godot/editor/animation_track_editor.cpp

/**************************************************************************/
/*  animation_track_editor.cpp                                            */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
/*                                                                        */
/* Permission is hereby granted, free of charge, to any person obtaining  */
/* a copy of this software and associated documentation files (the        */
/* "Software"), to deal in the Software without restriction, including    */
/* without limitation the rights to use, copy, modify, merge, publish,    */
/* distribute, sublicense, and/or sell copies of the Software, and to     */
/* permit persons to whom the Software is furnished to do so, subject to  */
/* the following conditions:                                              */
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/* The above copyright notice and this permission notice shall be         */
/* included in all copies or substantial portions of the Software.        */
/*                                                                        */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
/**************************************************************************/

#include "animation_track_editor.h"

#include "animation_track_editor_plugins.h"
#include "core/error/error_macros.h"
#include "core/input/input.h"
#include "editor/animation_bezier_editor.h"
#include "editor/editor_node.h"
#include "editor/editor_settings.h"
#include "editor/editor_string_names.h"
#include "editor/editor_undo_redo_manager.h"
#include "editor/gui/editor_spin_slider.h"
#include "editor/gui/scene_tree_editor.h"
#include "editor/inspector_dock.h"
#include "editor/plugins/animation_player_editor_plugin.h"
#include "editor/themes/editor_scale.h"
#include "scene/animation/animation_player.h"
#include "scene/animation/tween.h"
#include "scene/gui/check_box.h"
#include "scene/gui/grid_container.h"
#include "scene/gui/option_button.h"
#include "scene/gui/panel_container.h"
#include "scene/gui/separator.h"
#include "scene/gui/slider.h"
#include "scene/gui/spin_box.h"
#include "scene/gui/texture_rect.h"
#include "scene/gui/view_panner.h"
#include "scene/main/window.h"
#include "servers/audio/audio_stream.h"

constexpr double FPS_DECIMAL = 1;
constexpr double SECOND_DECIMAL = 0.0001;

void AnimationTrackKeyEdit::_bind_methods() {
	ClassDB::bind_method(D_METHOD("_update_obj"), &AnimationTrackKeyEdit::_update_obj);
	ClassDB::bind_method(D_METHOD("_key_ofs_changed"), &AnimationTrackKeyEdit::_key_ofs_changed);
	ClassDB::bind_method(D_METHOD("_hide_script_from_inspector"), &AnimationTrackKeyEdit::_hide_script_from_inspector);
	ClassDB::bind_method(D_METHOD("_hide_metadata_from_inspector"), &AnimationTrackKeyEdit::_hide_metadata_from_inspector);
	ClassDB::bind_method(D_METHOD("get_root_path"), &AnimationTrackKeyEdit::get_root_path);
	ClassDB::bind_method(D_METHOD("_dont_undo_redo"), &AnimationTrackKeyEdit::_dont_undo_redo);
	ClassDB::bind_method(D_METHOD("_is_read_only"), &AnimationTrackKeyEdit::_is_read_only);
}

void AnimationTrackKeyEdit::_fix_node_path(Variant &value) {
	NodePath np = value;

	if (np == NodePath()) {
		return;
	}

	Node *root = EditorNode::get_singleton()->get_tree()->get_root();

	Node *np_node = root->get_node_or_null(np);
	ERR_FAIL_NULL(np_node);

	Node *edited_node = root->get_node_or_null(base);
	ERR_FAIL_NULL(edited_node);

	value = edited_node->get_path_to(np_node);
}

void AnimationTrackKeyEdit::_update_obj(const Ref<Animation> &p_anim) {
	if (setting || animation != p_anim) {
		return;
	}

	notify_change();
}

void AnimationTrackKeyEdit::_key_ofs_changed(const Ref<Animation> &p_anim, float from, float to) {
	if (animation != p_anim || from != key_ofs) {
		return;
	}

	key_ofs = to;

	if (setting) {
		return;
	}

	notify_change();
}

bool AnimationTrackKeyEdit::_set(const StringName &p_name, const Variant &p_value) {
	int key = animation->track_find_key(track, key_ofs, Animation::FIND_MODE_APPROX);
	ERR_FAIL_COND_V(key == -1, false);

	String name = p_name;
	if (name == "easing") {
		float val = p_value;
		float prev_val = animation->track_get_key_transition(track, key);
		setting = true;
		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
		undo_redo->create_action(TTR("Animation Change Transition"), UndoRedo::MERGE_ENDS);
		undo_redo->add_do_method(animation.ptr(), "track_set_key_transition", track, key, val);
		undo_redo->add_undo_method(animation.ptr(), "track_set_key_transition", track, key, prev_val);
		undo_redo->add_do_method(this, "_update_obj", animation);
		undo_redo->add_undo_method(this, "_update_obj", animation);
		undo_redo->commit_action();

		setting = false;
		return true;
	}

	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	switch (animation->track_get_type(track)) {
		case Animation::TYPE_POSITION_3D:
		case Animation::TYPE_ROTATION_3D:
		case Animation::TYPE_SCALE_3D: {
			if (name == "position" || name == "rotation" || name == "scale") {
				Variant old = animation->track_get_key_value(track, key);
				setting = true;
				String action_name;
				switch (animation->track_get_type(track)) {
					case Animation::TYPE_POSITION_3D:
						action_name = TTR("Animation Change Position3D");
						break;
					case Animation::TYPE_ROTATION_3D:
						action_name = TTR("Animation Change Rotation3D");
						break;
					case Animation::TYPE_SCALE_3D:
						action_name = TTR("Animation Change Scale3D");
						break;
					default: {
					}
				}

				undo_redo->create_action(action_name);
				undo_redo->add_do_method(animation.ptr(), "track_set_key_value", track, key, p_value);
				undo_redo->add_undo_method(animation.ptr(), "track_set_key_value", track, key, old);
				undo_redo->add_do_method(this, "_update_obj", animation);
				undo_redo->add_undo_method(this, "_update_obj", animation);
				undo_redo->commit_action();

				setting = false;
				return true;
			}

		} break;
		case Animation::TYPE_BLEND_SHAPE:
		case Animation::TYPE_VALUE: {
			if (name == "value") {
				Variant value = p_value;

				if (value.get_type() == Variant::NODE_PATH) {
					_fix_node_path(value);
				}

				setting = true;
				undo_redo->create_action(TTR("Animation Change Keyframe Value"), UndoRedo::MERGE_ENDS);
				Variant prev = animation->track_get_key_value(track, key);
				undo_redo->add_do_method(animation.ptr(), "track_set_key_value", track, key, value);
				undo_redo->add_undo_method(animation.ptr(), "track_set_key_value", track, key, prev);
				undo_redo->add_do_method(this, "_update_obj", animation);
				undo_redo->add_undo_method(this, "_update_obj", animation);
				undo_redo->commit_action();

				setting = false;
				return true;
			}
		} break;
		case Animation::TYPE_METHOD: {
			Dictionary d_old = animation->track_get_key_value(track, key);
			Dictionary d_new = d_old.duplicate();

			bool change_notify_deserved = false;
			bool mergeable = false;

			if (name == "name") {
				d_new["method"] = p_value;
			} else if (name == "arg_count") {
				Vector<Variant> args = d_old["args"];
				args.resize(p_value);
				d_new["args"] = args;
				change_notify_deserved = true;
			} else if (name.begins_with("args/")) {
				Vector<Variant> args = d_old["args"];
				int idx = name.get_slice("/", 1).to_int();
				ERR_FAIL_INDEX_V(idx, args.size(), false);

				String what = name.get_slice("/", 2);
				if (what == "type") {
					Variant::Type t = Variant::Type(int(p_value));

					if (t != args[idx].get_type()) {
						Callable::CallError err;
						if (Variant::can_convert_strict(args[idx].get_type(), t)) {
							Variant old = args[idx];
							Variant *ptrs[1] = { &old };
							Variant::construct(t, args.write[idx], (const Variant **)ptrs, 1, err);
						} else {
							Variant::construct(t, args.write[idx], nullptr, 0, err);
						}
						change_notify_deserved = true;
						d_new["args"] = args;
					}
				} else if (what == "value") {
					Variant value = p_value;
					if (value.get_type() == Variant::NODE_PATH) {
						_fix_node_path(value);
					}

					args.write[idx] = value;
					d_new["args"] = args;
					mergeable = true;
				}
			}

			if (mergeable) {
				undo_redo->create_action(TTR("Animation Change Call"), UndoRedo::MERGE_ENDS);
			} else {
				undo_redo->create_action(TTR("Animation Change Call"));
			}

			setting = true;
			undo_redo->add_do_method(animation.ptr(), "track_set_key_value", track, key, d_new);
			undo_redo->add_undo_method(animation.ptr(), "track_set_key_value", track, key, d_old);
			undo_redo->add_do_method(this, "_update_obj", animation);
			undo_redo->add_undo_method(this, "_update_obj", animation);
			undo_redo->commit_action();

			setting = false;
			if (change_notify_deserved) {
				notify_change();
			}
			return true;
		} break;
		case Animation::TYPE_BEZIER: {
			if (name == "value") {
				const Variant &value = p_value;

				setting = true;
				undo_redo->create_action(TTR("Animation Change Keyframe Value"), UndoRedo::MERGE_ENDS);
				float prev = animation->bezier_track_get_key_value(track, key);
				undo_redo->add_do_method(animation.ptr(), "bezier_track_set_key_value", track, key, value);
				undo_redo->add_undo_method(animation.ptr(), "bezier_track_set_key_value", track, key, prev);
				undo_redo->add_do_method(this, "_update_obj", animation);
				undo_redo->add_undo_method(this, "_update_obj", animation);
				undo_redo->commit_action();

				setting = false;
				return true;
			}

			if (name == "in_handle") {
				const Variant &value = p_value;

				setting = true;
				undo_redo->create_action(TTR("Animation Change Keyframe Value"), UndoRedo::MERGE_ENDS);
				Vector2 prev = animation->bezier_track_get_key_in_handle(track, key);
				undo_redo->add_do_method(animation.ptr(), "bezier_track_set_key_in_handle", track, key, value);
				undo_redo->add_undo_method(animation.ptr(), "bezier_track_set_key_in_handle", track, key, prev);
				undo_redo->add_do_method(this, "_update_obj", animation);
				undo_redo->add_undo_method(this, "_update_obj", animation);
				undo_redo->commit_action();

				setting = false;
				return true;
			}

			if (name == "out_handle") {
				const Variant &value = p_value;

				setting = true;
				undo_redo->create_action(TTR("Animation Change Keyframe Value"), UndoRedo::MERGE_ENDS);
				Vector2 prev = animation->bezier_track_get_key_out_handle(track, key);
				undo_redo->add_do_method(animation.ptr(), "bezier_track_set_key_out_handle", track, key, value);
				undo_redo->add_undo_method(animation.ptr(), "bezier_track_set_key_out_handle", track, key, prev);
				undo_redo->add_do_method(this, "_update_obj", animation);
				undo_redo->add_undo_method(this, "_update_obj", animation);
				undo_redo->commit_action();

				setting = false;
				return true;
			}

			if (name == "handle_mode") {
				const Variant &value = p_value;

				setting = true;
				undo_redo->create_action(TTR("Animation Change Keyframe Value"), UndoRedo::MERGE_ENDS, animation.ptr());
				int prev_mode = animation->bezier_track_get_key_handle_mode(track, key);
				Vector2 prev_in_handle = animation->bezier_track_get_key_in_handle(track, key);
				Vector2 prev_out_handle = animation->bezier_track_get_key_out_handle(track, key);
				undo_redo->add_do_method(editor, "_bezier_track_set_key_handle_mode", animation.ptr(), track, key, value);
				undo_redo->add_do_method(this, "_update_obj", animation);
				undo_redo->add_undo_method(editor, "_bezier_track_set_key_handle_mode", animation.ptr(), track, key, prev_mode);
				undo_redo->add_undo_method(animation.ptr(), "bezier_track_set_key_in_handle", track, key, prev_in_handle);
				undo_redo->add_undo_method(animation.ptr(), "bezier_track_set_key_out_handle", track, key, prev_out_handle);
				undo_redo->add_undo_method(this, "_update_obj", animation);
				undo_redo->commit_action();

				setting = false;
				return true;
			}
		} break;
		case Animation::TYPE_AUDIO: {
			if (name == "stream") {
				Ref<AudioStream> stream = p_value;

				setting = true;
				undo_redo->create_action(TTR("Animation Change Keyframe Value"), UndoRedo::MERGE_ENDS);
				Ref<Resource> prev = animation->audio_track_get_key_stream(track, key);
				undo_redo->add_do_method(animation.ptr(), "audio_track_set_key_stream", track, key, stream);
				undo_redo->add_undo_method(animation.ptr(), "audio_track_set_key_stream", track, key, prev);
				undo_redo->add_do_method(this, "_update_obj", animation);
				undo_redo->add_undo_method(this, "_update_obj", animation);
				undo_redo->commit_action();

				setting = false;
				notify_change(); // To update limits for `start_offset`/`end_offset` sliders (they depend on the stream length).
				return true;
			}

			if (name == "start_offset") {
				float value = p_value;

				setting = true;
				undo_redo->create_action(TTR("Animation Change Keyframe Value"), UndoRedo::MERGE_ENDS);
				float prev = animation->audio_track_get_key_start_offset(track, key);
				undo_redo->add_do_method(animation.ptr(), "audio_track_set_key_start_offset", track, key, value);
				undo_redo->add_undo_method(animation.ptr(), "audio_track_set_key_start_offset", track, key, prev);
				undo_redo->add_do_method(this, "_update_obj", animation);
				undo_redo->add_undo_method(this, "_update_obj", animation);
				undo_redo->commit_action();

				setting = false;
				return true;
			}

			if (name == "end_offset") {
				float value = p_value;

				setting = true;
				undo_redo->create_action(TTR("Animation Change Keyframe Value"), UndoRedo::MERGE_ENDS);
				float prev = animation->audio_track_get_key_end_offset(track, key);
				undo_redo->add_do_method(animation.ptr(), "audio_track_set_key_end_offset", track, key, value);
				undo_redo->add_undo_method(animation.ptr(), "audio_track_set_key_end_offset", track, key, prev);
				undo_redo->add_do_method(this, "_update_obj", animation);
				undo_redo->add_undo_method(this, "_update_obj", animation);
				undo_redo->commit_action();

				setting = false;
				return true;
			}
		} break;
		case Animation::TYPE_ANIMATION: {
			if (name == "animation") {
				StringName anim_name = p_value;

				setting = true;
				undo_redo->create_action(TTR("Animation Change Keyframe Value"), UndoRedo::MERGE_ENDS);
				StringName prev = animation->animation_track_get_key_animation(track, key);
				undo_redo->add_do_method(animation.ptr(), "animation_track_set_key_animation", track, key, anim_name);
				undo_redo->add_undo_method(animation.ptr(), "animation_track_set_key_animation", track, key, prev);
				undo_redo->add_do_method(this, "_update_obj", animation);
				undo_redo->add_undo_method(this, "_update_obj", animation);
				undo_redo->commit_action();

				setting = false;
				return true;
			}
		} break;
	}

	return false;
}

bool AnimationTrackKeyEdit::_get(const StringName &p_name, Variant &r_ret) const {
	int key = animation->track_find_key(track, key_ofs, Animation::FIND_MODE_APPROX);
	ERR_FAIL_COND_V(key == -1, false);

	String name = p_name;
	if (name == "easing") {
		r_ret = animation->track_get_key_transition(track, key);
		return true;
	}

	switch (animation->track_get_type(track)) {
		case Animation::TYPE_POSITION_3D:
		case Animation::TYPE_ROTATION_3D:
		case Animation::TYPE_SCALE_3D: {
			if (name == "position" || name == "rotation" || name == "scale") {
				r_ret = animation->track_get_key_value(track, key);
				return true;
			}
		} break;
		case Animation::TYPE_BLEND_SHAPE:
		case Animation::TYPE_VALUE: {
			if (name == "value") {
				r_ret = animation->track_get_key_value(track, key);
				return true;
			}

		} break;
		case Animation::TYPE_METHOD: {
			Dictionary d = animation->track_get_key_value(track, key);

			if (name == "name") {
				ERR_FAIL_COND_V(!d.has("method"), false);
				r_ret = d["method"];
				return true;
			}

			ERR_FAIL_COND_V(!d.has("args"), false);

			Vector<Variant> args = d["args"];

			if (name == "arg_count") {
				r_ret = args.size();
				return true;
			}

			if (name.begins_with("args/")) {
				int idx = name.get_slice("/", 1).to_int();
				ERR_FAIL_INDEX_V(idx, args.size(), false);

				String what = name.get_slice("/", 2);
				if (what == "type") {
					r_ret = args[idx].get_type();
					return true;
				}

				if (what == "value") {
					r_ret = args[idx];
					return true;
				}
			}

		} break;
		case Animation::TYPE_BEZIER: {
			if (name == "value") {
				r_ret = animation->bezier_track_get_key_value(track, key);
				return true;
			}

			if (name == "in_handle") {
				r_ret = animation->bezier_track_get_key_in_handle(track, key);
				return true;
			}

			if (name == "out_handle") {
				r_ret = animation->bezier_track_get_key_out_handle(track, key);
				return true;
			}

			if (name == "handle_mode") {
				r_ret = animation->bezier_track_get_key_handle_mode(track, key);
				return true;
			}

		} break;
		case Animation::TYPE_AUDIO: {
			if (name == "stream") {
				r_ret = animation->audio_track_get_key_stream(track, key);
				return true;
			}

			if (name == "start_offset") {
				r_ret = animation->audio_track_get_key_start_offset(track, key);
				return true;
			}

			if (name == "end_offset") {
				r_ret = animation->audio_track_get_key_end_offset(track, key);
				return true;
			}

		} break;
		case Animation::TYPE_ANIMATION: {
			if (name == "animation") {
				r_ret = animation->animation_track_get_key_animation(track, key);
				return true;
			}

		} break;
	}

	return false;
}

void AnimationTrackKeyEdit::_get_property_list(List<PropertyInfo> *p_list) const {
	if (animation.is_null()) {
		return;
	}

	ERR_FAIL_INDEX(track, animation->get_track_count());
	int key = animation->track_find_key(track, key_ofs, Animation::FIND_MODE_APPROX);
	ERR_FAIL_COND(key == -1);

	switch (animation->track_get_type(track)) {
		case Animation::TYPE_POSITION_3D: {
			p_list->push_back(PropertyInfo(Variant::VECTOR3, PNAME("position")));
		} break;
		case Animation::TYPE_ROTATION_3D: {
			p_list->push_back(PropertyInfo(Variant::QUATERNION, PNAME("rotation")));
		} break;
		case Animation::TYPE_SCALE_3D: {
			p_list->push_back(PropertyInfo(Variant::VECTOR3, PNAME("scale")));
		} break;
		case Animation::TYPE_BLEND_SHAPE: {
			p_list->push_back(PropertyInfo(Variant::FLOAT, PNAME("value")));
		} break;
		case Animation::TYPE_VALUE: {
			Variant v = animation->track_get_key_value(track, key);

			if (hint.type != Variant::NIL) {
				PropertyInfo pi = hint;
				pi.name = PNAME("value");
				p_list->push_back(pi);
			} else {
				PropertyHint val_hint = PROPERTY_HINT_NONE;
				String val_hint_string;

				if (v.get_type() == Variant::OBJECT) {
					// Could actually check the object property if exists..? Yes I will!
					Ref<Resource> res = v;
					if (res.is_valid()) {
						val_hint = PROPERTY_HINT_RESOURCE_TYPE;
						val_hint_string = res->get_class();
					}
				}

				if (v.get_type() != Variant::NIL) {
					p_list->push_back(PropertyInfo(v.get_type(), PNAME("value"), val_hint, val_hint_string));
				}
			}

		} break;
		case Animation::TYPE_METHOD: {
			p_list->push_back(PropertyInfo(Variant::STRING_NAME, PNAME("name")));
			p_list->push_back(PropertyInfo(Variant::INT, PNAME("arg_count"), PROPERTY_HINT_RANGE, "0,32,1,or_greater"));

			Dictionary d = animation->track_get_key_value(track, key);
			ERR_FAIL_COND(!d.has("args"));
			Vector<Variant> args = d["args"];
			String vtypes;
			for (int i = 0; i < Variant::VARIANT_MAX; i++) {
				if (i > 0) {
					vtypes += ",";
				}
				vtypes += Variant::get_type_name(Variant::Type(i));
			}

			for (int i = 0; i < args.size(); i++) {
				p_list->push_back(PropertyInfo(Variant::INT, vformat("%s/%d/%s", PNAME("args"), i, PNAME("type")), PROPERTY_HINT_ENUM, vtypes));
				if (args[i].get_type() != Variant::NIL) {
					p_list->push_back(PropertyInfo(args[i].get_type(), vformat("%s/%d/%s", PNAME("args"), i, PNAME("value"))));
				}
			}

		} break;
		case Animation::TYPE_BEZIER: {
			Animation::HandleMode hm = animation->bezier_track_get_key_handle_mode(track, key);
			p_list->push_back(PropertyInfo(Variant::FLOAT, PNAME("value")));
			if (hm == Animation::HANDLE_MODE_LINEAR) {
				p_list->push_back(PropertyInfo(Variant::VECTOR2, PNAME("in_handle"), PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_READ_ONLY));
				p_list->push_back(PropertyInfo(Variant::VECTOR2, PNAME("out_handle"), PROPERTY_HINT_NONE, "", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_READ_ONLY));
			} else {
				p_list->push_back(PropertyInfo(Variant::VECTOR2, PNAME("in_handle")));
				p_list->push_back(PropertyInfo(Variant::VECTOR2, PNAME("out_handle")));
			}
			p_list->push_back(PropertyInfo(Variant::INT, PNAME("handle_mode"), PROPERTY_HINT_ENUM, "Free,Linear,Balanced,Mirrored"));

		} break;
		case Animation::TYPE_AUDIO: {
			p_list->push_back(PropertyInfo(Variant::OBJECT, PNAME("stream"), PROPERTY_HINT_RESOURCE_TYPE, "AudioStream"));
			Ref<AudioStream> audio_stream = animation->audio_track_get_key_stream(track, key);
			String hint_string = vformat("0,%.4f,0.0001,or_greater", audio_stream.is_valid() ? audio_stream->get_length() : 3600.0);
			p_list->push_back(PropertyInfo(Variant::FLOAT, PNAME("start_offset"), PROPERTY_HINT_RANGE, hint_string));
			p_list->push_back(PropertyInfo(Variant::FLOAT, PNAME("end_offset"), PROPERTY_HINT_RANGE, hint_string));

		} break;
		case Animation::TYPE_ANIMATION: {
			String animations;

			if (root_path) {
				AnimationPlayer *ap = Object::cast_to<AnimationPlayer>(root_path->get_node_or_null(animation->track_get_path(track)));
				if (ap) {
					List<StringName> anims;
					ap->get_animation_list(&anims);
					for (const StringName &E : anims) {
						if (!animations.is_empty()) {
							animations += ",";
						}

						animations += String(E);
					}
				}
			}

			if (!animations.is_empty()) {
				animations += ",";
			}
			animations += "[stop]";

			p_list->push_back(PropertyInfo(Variant::STRING_NAME, PNAME("animation"), PROPERTY_HINT_ENUM, animations));

		} break;
	}

	if (animation->track_get_type(track) == Animation::TYPE_VALUE) {
		p_list->push_back(PropertyInfo(Variant::FLOAT, PNAME("easing"), PROPERTY_HINT_EXP_EASING));
	}
}

void AnimationTrackKeyEdit::notify_change() {
	notify_property_list_changed();
}

Node *AnimationTrackKeyEdit::get_root_path() {
	return root_path;
}

void AnimationTrackKeyEdit::set_use_fps(bool p_enable) {
	use_fps = p_enable;
	notify_property_list_changed();
}

void AnimationMultiTrackKeyEdit::_bind_methods() {
	ClassDB::bind_method(D_METHOD("_update_obj"), &AnimationMultiTrackKeyEdit::_update_obj);
	ClassDB::bind_method(D_METHOD("_key_ofs_changed"), &AnimationMultiTrackKeyEdit::_key_ofs_changed);
	ClassDB::bind_method(D_METHOD("_hide_script_from_inspector"), &AnimationMultiTrackKeyEdit::_hide_script_from_inspector);
	ClassDB::bind_method(D_METHOD("_hide_metadata_from_inspector"), &AnimationMultiTrackKeyEdit::_hide_metadata_from_inspector);
	ClassDB::bind_method(D_METHOD("get_root_path"), &AnimationMultiTrackKeyEdit::get_root_path);
	ClassDB::bind_method(D_METHOD("_dont_undo_redo"), &AnimationMultiTrackKeyEdit::_dont_undo_redo);
	ClassDB::bind_method(D_METHOD("_is_read_only"), &AnimationMultiTrackKeyEdit::_is_read_only);
}

void AnimationMultiTrackKeyEdit::_fix_node_path(Variant &value, NodePath &base) {
	NodePath np = value;

	if (np == NodePath()) {
		return;
	}

	Node *root = EditorNode::get_singleton()->get_tree()->get_root();

	Node *np_node = root->get_node_or_null(np);
	ERR_FAIL_NULL(np_node);

	Node *edited_node = root->get_node_or_null(base);
	ERR_FAIL_NULL(edited_node);

	value = edited_node->get_path_to(np_node);
}

void AnimationMultiTrackKeyEdit::_update_obj(const Ref<Animation> &p_anim) {
	if (setting || animation != p_anim) {
		return;
	}

	notify_change();
}

void AnimationMultiTrackKeyEdit::_key_ofs_changed(const Ref<Animation> &p_anim, float from, float to) {
	if (animation != p_anim) {
		return;
	}

	for (const KeyValue<int, List<float>> &E : key_ofs_map) {
		int key = 0;
		for (const float &key_ofs : E.value) {
			if (from != key_ofs) {
				key++;
				continue;
			}

			int track = E.key;
			key_ofs_map[track].get(key) = to;

			if (setting) {
				return;
			}

			notify_change();

			return;
		}
	}
}

bool AnimationMultiTrackKeyEdit::_set(const StringName &p_name, const Variant &p_value) {
	bool update_obj = false;
	bool change_notify_deserved = false;
	for (const KeyValue<int, List<float>> &E : key_ofs_map) {
		int track = E.key;
		for (const float &key_ofs : E.value) {
			int key = animation->track_find_key(track, key_ofs, Animation::FIND_MODE_APPROX);
			ERR_FAIL_COND_V(key == -1, false);

			String name = p_name;
			if (name == "easing") {
				float val = p_value;
				float prev_val = animation->track_get_key_transition(track, key);

				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
				if (!setting) {
					setting = true;
					undo_redo->create_action(TTR("Animation Multi Change Transition"), UndoRedo::MERGE_ENDS);
				}
				undo_redo->add_do_method(animation.ptr(), "track_set_key_transition", track, key, val);
				undo_redo->add_undo_method(animation.ptr(), "track_set_key_transition", track, key, prev_val);
				update_obj = true;
			}

			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			switch (animation->track_get_type(track)) {
				case Animation::TYPE_POSITION_3D:
				case Animation::TYPE_ROTATION_3D:
				case Animation::TYPE_SCALE_3D: {
					Variant old = animation->track_get_key_value(track, key);
					if (!setting) {
						String action_name;
						switch (animation->track_get_type(track)) {
							case Animation::TYPE_POSITION_3D:
								action_name = TTR("Animation Multi Change Position3D");
								break;
							case Animation::TYPE_ROTATION_3D:
								action_name = TTR("Animation Multi Change Rotation3D");
								break;
							case Animation::TYPE_SCALE_3D:
								action_name = TTR("Animation Multi Change Scale3D");
								break;
							default: {
							}
						}

						setting = true;
						undo_redo->create_action(action_name);
					}
					undo_redo->add_do_method(animation.ptr(), "track_set_key_value", track, key, p_value);
					undo_redo->add_undo_method(animation.ptr(), "track_set_key_value", track, key, old);
					update_obj = true;
				} break;
				case Animation::TYPE_BLEND_SHAPE:
				case Animation::TYPE_VALUE: {
					if (name == "value") {
						Variant value = p_value;

						if (value.get_type() == Variant::NODE_PATH) {
							_fix_node_path(value, base_map[track]);
						}

						if (!setting) {
							setting = true;
							undo_redo->create_action(TTR("Animation Multi Change Keyframe Value"), UndoRedo::MERGE_ENDS);
						}
						Variant prev = animation->track_get_key_value(track, key);
						undo_redo->add_do_method(animation.ptr(), "track_set_key_value", track, key, value);
						undo_redo->add_undo_method(animation.ptr(), "track_set_key_value", track, key, prev);
						update_obj = true;
					}
				} break;
				case Animation::TYPE_METHOD: {
					Dictionary d_old = animation->track_get_key_value(track, key);
					Dictionary d_new = d_old.duplicate();

					bool mergeable = false;

					if (name == "name") {
						d_new["method"] = p_value;
					} else if (name == "arg_count") {
						Vector<Variant> args = d_old["args"];
						args.resize(p_value);
						d_new["args"] = args;
						change_notify_deserved = true;
					} else if (name.begins_with("args/")) {
						Vector<Variant> args = d_old["args"];
						int idx = name.get_slice("/", 1).to_int();
						ERR_FAIL_INDEX_V(idx, args.size(), false);

						String what = name.get_slice("/", 2);
						if (what == "type") {
							Variant::Type t = Variant::Type(int(p_value));

							if (t != args[idx].get_type()) {
								Callable::CallError err;
								if (Variant::can_convert_strict(args[idx].get_type(), t)) {
									Variant old = args[idx];
									Variant *ptrs[1] = { &old };
									Variant::construct(t, args.write[idx], (const Variant **)ptrs, 1, err);
								} else {
									Variant::construct(t, args.write[idx], nullptr, 0, err);
								}
								change_notify_deserved = true;
								d_new["args"] = args;
							}
						} else if (what == "value") {
							Variant value = p_value;
							if (value.get_type() == Variant::NODE_PATH) {
								_fix_node_path(value, base_map[track]);
							}

							args.write[idx] = value;
							d_new["args"] = args;
							mergeable = true;
						}
					}

					Variant prev = animation->track_get_key_value(track, key);

					if (!setting) {
						if (mergeable) {
							undo_redo->create_action(TTR("Animation Multi Change Call"), UndoRedo::MERGE_ENDS);
						} else {
							undo_redo->create_action(TTR("Animation Multi Change Call"));
						}

						setting = true;
					}

					undo_redo->add_do_method(animation.ptr(), "track_set_key_value", track, key, d_new);
					undo_redo->add_undo_method(animation.ptr(), "track_set_key_value", track, key, d_old);
					update_obj = true;
				} break;
				case Animation::TYPE_BEZIER: {
					if (name == "value") {
						const Variant &value = p_value;

						if (!setting) {
							setting = true;
							undo_redo->create_action(TTR("Animation Multi Change Keyframe Value"), UndoRedo::MERGE_ENDS);
						}
						float prev = animation->bezier_track_get_key_value(track, key);
						undo_redo->add_do_method(animation.ptr(), "bezier_track_set_key_value", track, key, value);
						undo_redo->add_undo_method(animation.ptr(), "bezier_track_set_key_value", track, key, prev);
						update_obj = true;
					} else if (name == "in_handle") {
						const Variant &value = p_value;

						if (!setting) {
							setting = true;
							undo_redo->create_action(TTR("Animation Multi Change Keyframe Value"), UndoRedo::MERGE_ENDS);
						}
						Vector2 prev = animation->bezier_track_get_key_in_handle(track, key);
						undo_redo->add_do_method(animation.ptr(), "bezier_track_set_key_in_handle", track, key, value);
						undo_redo->add_undo_method(animation.ptr(), "bezier_track_set_key_in_handle", track, key, prev);
						update_obj = true;
					} else if (name == "out_handle") {
						const Variant &value = p_value;

						if (!setting) {
							setting = true;
							undo_redo->create_action(TTR("Animation Multi Change Keyframe Value"), UndoRedo::MERGE_ENDS);
						}
						Vector2 prev = animation->bezier_track_get_key_out_handle(track, key);
						undo_redo->add_do_method(this, "_bezier_track_set_key_out_handle", track, key, value);
						undo_redo->add_undo_method(this, "_bezier_track_set_key_out_handle", track, key, prev);
						update_obj = true;
					} else if (name == "handle_mode") {
						const Variant &value = p_value;

						if (!setting) {
							setting = true;
							undo_redo->create_action(TTR("Animation Multi Change Keyframe Value"), UndoRedo::MERGE_ENDS);
						}
						int prev_mode = animation->bezier_track_get_key_handle_mode(track, key);
						Vector2 prev_in_handle = animation->bezier_track_get_key_in_handle(track, key);
						Vector2 prev_out_handle = animation->bezier_track_get_key_out_handle(track, key);
						undo_redo->add_do_method(editor, "_bezier_track_set_key_handle_mode", animation.ptr(), track, key, value);
						undo_redo->add_undo_method(editor, "_bezier_track_set_key_handle_mode", animation.ptr(), track, key, prev_mode);
						undo_redo->add_undo_method(animation.ptr(), "bezier_track_set_key_in_handle", track, key, prev_in_handle);
						undo_redo->add_undo_method(animation.ptr(), "bezier_track_set_key_out_handle", track, key, prev_out_handle);
						update_obj = true;
					}
				} break;
				case Animation::TYPE_AUDIO: {
					if (name == "stream") {
						Ref<AudioStream> stream = p_value;

						if (!setting) {
							setting = true;
							undo_redo->create_action(TTR("Animation Multi Change Keyframe Value"), UndoRedo::MERGE_ENDS);
						}
						Ref<Resource> prev = animation->audio_track_get_key_stream(track, key);
						undo_redo->add_do_method(animation.ptr(), "audio_track_set_key_stream", track, key, stream);
						undo_redo->add_undo_method(animation.ptr(), "audio_track_set_key_stream", track, key, prev);
						update_obj = true;
					} else if (name == "start_offset") {
						float value = p_value;

						if (!setting) {
							setting = true;
							undo_redo->create_action(TTR("Animation Multi Change Keyframe Value"), UndoRedo::MERGE_ENDS);
						}
						float prev = animation->audio_track_get_key_start_offset(track, key);
						undo_redo->add_do_method(animation.ptr(), "audio_track_set_key_start_offset", track, key, value);
						undo_redo->add_undo_method(animation.ptr(), "audio_track_set_key_start_offset", track, key, prev);
						update_obj = true;
					} else if (name == "end_offset") {
						float value = p_value;

						if (!setting) {
							setting = true;
							undo_redo->create_action(TTR("Animation Multi Change Keyframe Value"), UndoRedo::MERGE_ENDS);
						}
						float prev = animation->audio_track_get_key_end_offset(track, key);
						undo_redo->add_do_method(animation.ptr(), "audio_track_set_key_end_offset", track, key, value);
						undo_redo->add_undo_method(animation.ptr(), "audio_track_set_key_end_offset", track, key, prev);
						update_obj = true;
					}
				} break;
				case Animation::TYPE_ANIMATION: {
					if (name == "animation") {
						StringName anim_name = p_value;

						if (!setting) {
							setting = true;
							undo_redo->create_action(TTR("Animation Multi Change Keyframe Value"), UndoRedo::MERGE_ENDS);
						}
						StringName prev = animation->animation_track_get_key_animation(track, key);
						undo_redo->add_do_method(animation.ptr(), "animation_track_set_key_animation", track, key, anim_name);
						undo_redo->add_undo_method(animation.ptr(), "animation_track_set_key_animation", track, key, prev);
						update_obj = true;
					}
				} break;
			}
		}
	}

	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	if (setting) {
		if (update_obj) {
			undo_redo->add_do_method(this, "_update_obj", animation);
			undo_redo->add_undo_method(this, "_update_obj", animation);
		}

		undo_redo->commit_action();
		setting = false;

		if (change_notify_deserved) {
			notify_change();
		}

		return true;
	}

	return false;
}

bool AnimationMultiTrackKeyEdit::_get(const StringName &p_name, Variant &r_ret) const {
	for (const KeyValue<int, List<float>> &E : key_ofs_map) {
		int track = E.key;
		for (const float &key_ofs : E.value) {
			int key = animation->track_find_key(track, key_ofs, Animation::FIND_MODE_APPROX);
			ERR_CONTINUE(key == -1);

			String name = p_name;
			if (name == "easing") {
				r_ret = animation->track_get_key_transition(track, key);
				return true;
			}

			switch (animation->track_get_type(track)) {
				case Animation::TYPE_POSITION_3D:
				case Animation::TYPE_ROTATION_3D:
				case Animation::TYPE_SCALE_3D: {
					if (name == "position" || name == "rotation" || name == "scale") {
						r_ret = animation->track_get_key_value(track, key);
						return true;
					}

				} break;
				case Animation::TYPE_BLEND_SHAPE:
				case Animation::TYPE_VALUE: {
					if (name == "value") {
						r_ret = animation->track_get_key_value(track, key);
						return true;
					}

				} break;
				case Animation::TYPE_METHOD: {
					Dictionary d = animation->track_get_key_value(track, key);

					if (name == "name") {
						ERR_FAIL_COND_V(!d.has("method"), false);
						r_ret = d["method"];
						return true;
					}

					ERR_FAIL_COND_V(!d.has("args"), false);

					Vector<Variant> args = d["args"];

					if (name == "arg_count") {
						r_ret = args.size();
						return true;
					}

					if (name.begins_with("args/")) {
						int idx = name.get_slice("/", 1).to_int();
						ERR_FAIL_INDEX_V(idx, args.size(), false);

						String what = name.get_slice("/", 2);
						if (what == "type") {
							r_ret = args[idx].get_type();
							return true;
						}

						if (what == "value") {
							r_ret = args[idx];
							return true;
						}
					}

				} break;
				case Animation::TYPE_BEZIER: {
					if (name == "value") {
						r_ret = animation->bezier_track_get_key_value(track, key);
						return true;
					}

					if (name == "in_handle") {
						r_ret = animation->bezier_track_get_key_in_handle(track, key);
						return true;
					}

					if (name == "out_handle") {
						r_ret = animation->bezier_track_get_key_out_handle(track, key);
						return true;
					}

					if (name == "handle_mode") {
						r_ret = animation->bezier_track_get_key_handle_mode(track, key);
						return true;
					}

				} break;
				case Animation::TYPE_AUDIO: {
					if (name == "stream") {
						r_ret = animation->audio_track_get_key_stream(track, key);
						return true;
					}

					if (name == "start_offset") {
						r_ret = animation->audio_track_get_key_start_offset(track, key);
						return true;
					}

					if (name == "end_offset") {
						r_ret = animation->audio_track_get_key_end_offset(track, key);
						return true;
					}

				} break;
				case Animation::TYPE_ANIMATION: {
					if (name == "animation") {
						r_ret = animation->animation_track_get_key_animation(track, key);
						return true;
					}

				} break;
			}
		}
	}

	return false;
}

void AnimationMultiTrackKeyEdit::_get_property_list(List<PropertyInfo> *p_list) const {
	if (animation.is_null()) {
		return;
	}

	int first_track = -1;
	float first_key = -1.0;

	bool same_track_type = true;
	bool same_key_type = true;
	for (const KeyValue<int, List<float>> &E : key_ofs_map) {
		int track = E.key;
		ERR_FAIL_INDEX(track, animation->get_track_count());

		if (first_track < 0) {
			first_track = track;
		}

		if (same_track_type) {
			if (animation->track_get_type(first_track) != animation->track_get_type(track)) {
				same_track_type = false;
				same_key_type = false;
			}

			for (const float &F : E.value) {
				int key = animation->track_find_key(track, F, Animation::FIND_MODE_APPROX);
				ERR_FAIL_COND(key == -1);
				if (first_key < 0) {
					first_key = key;
				}

				if (animation->track_get_key_value(first_track, first_key).get_type() != animation->track_get_key_value(track, key).get_type()) {
					same_key_type = false;
				}
			}
		}
	}

	if (same_track_type) {
		switch (animation->track_get_type(first_track)) {
			case Animation::TYPE_POSITION_3D: {
				p_list->push_back(PropertyInfo(Variant::VECTOR3, "position"));
			} break;
			case Animation::TYPE_ROTATION_3D: {
				p_list->push_back(PropertyInfo(Variant::QUATERNION, "rotation"));
			} break;
			case Animation::TYPE_SCALE_3D: {
				p_list->push_back(PropertyInfo(Variant::VECTOR3, "scale"));
			} break;
			case Animation::TYPE_BLEND_SHAPE: {
				p_list->push_back(PropertyInfo(Variant::FLOAT, "value"));
			} break;
			case Animation::TYPE_VALUE: {
				if (same_key_type) {
					Variant v = animation->track_get_key_value(first_track, first_key);

					if (hint.type != Variant::NIL) {
						PropertyInfo pi = hint;
						pi.name = "value";
						p_list->push_back(pi);
					} else {
						PropertyHint val_hint = PROPERTY_HINT_NONE;
						String val_hint_string;

						if (v.get_type() == Variant::OBJECT) {
							// Could actually check the object property if exists..? Yes I will!
							Ref<Resource> res = v;
							if (res.is_valid()) {
								val_hint = PROPERTY_HINT_RESOURCE_TYPE;
								val_hint_string = res->get_class();
							}
						}

						if (v.get_type() != Variant::NIL) {
							p_list->push_back(PropertyInfo(v.get_type(), "value", val_hint, val_hint_string));
						}
					}
				}

				p_list->push_back(PropertyInfo(Variant::FLOAT, "easing", PROPERTY_HINT_EXP_EASING));
			} break;
			case Animation::TYPE_METHOD: {
				p_list->push_back(PropertyInfo(Variant::STRING_NAME, "name"));

				p_list->push_back(PropertyInfo(Variant::INT, "arg_count", PROPERTY_HINT_RANGE, "0,32,1,or_greater"));

				Dictionary d = animation->track_get_key_value(first_track, first_key);
				ERR_FAIL_COND(!d.has("args"));
				Vector<Variant> args = d["args"];
				String vtypes;
				for (int i = 0; i < Variant::VARIANT_MAX; i++) {
					if (i > 0) {
						vtypes += ",";
					}
					vtypes += Variant::get_type_name(Variant::Type(i));
				}

				for (int i = 0; i < args.size(); i++) {
					p_list->push_back(PropertyInfo(Variant::INT, "args/" + itos(i) + "/type", PROPERTY_HINT_ENUM, vtypes));
					if (args[i].get_type() != Variant::NIL) {
						p_list->push_back(PropertyInfo(args[i].get_type(), "args/" + itos(i) + "/value"));
					}
				}
			} break;
			case Animation::TYPE_BEZIER: {
				p_list->push_back(PropertyInfo(Variant::FLOAT, "value"));
				p_list->push_back(PropertyInfo(Variant::VECTOR2, "in_handle"));
				p_list->push_back(PropertyInfo(Variant::VECTOR2, "out_handle"));
				p_list->push_back(PropertyInfo(Variant::INT, "handle_mode", PROPERTY_HINT_ENUM, "Free,Linear,Balanced,Mirrored"));
			} break;
			case Animation::TYPE_AUDIO: {
				p_list->push_back(PropertyInfo(Variant::OBJECT, "stream", PROPERTY_HINT_RESOURCE_TYPE, "AudioStream"));
				p_list->push_back(PropertyInfo(Variant::FLOAT, "start_offset", PROPERTY_HINT_RANGE, "0,3600,0.0001,or_greater"));
				p_list->push_back(PropertyInfo(Variant::FLOAT, "end_offset", PROPERTY_HINT_RANGE, "0,3600,0.0001,or_greater"));
			} break;
			case Animation::TYPE_ANIMATION: {
				if (key_ofs_map.size() > 1) {
					break;
				}

				String animations;

				if (root_path) {
					AnimationPlayer *ap = Object::cast_to<AnimationPlayer>(root_path->get_node_or_null(animation->track_get_path(first_track)));
					if (ap) {
						List<StringName> anims;
						ap->get_animation_list(&anims);
						for (List<StringName>::Element *G = anims.front(); G; G = G->next()) {
							if (!animations.is_empty()) {
								animations += ",";
							}

							animations += String(G->get());
						}
					}
				}

				if (!animations.is_empty()) {
					animations += ",";
				}
				animations += "[stop]";

				p_list->push_back(PropertyInfo(Variant::STRING_NAME, "animation", PROPERTY_HINT_ENUM, animations));
			} break;
		}
	}
}

void AnimationMultiTrackKeyEdit::notify_change() {
	notify_property_list_changed();
}

Node *AnimationMultiTrackKeyEdit::get_root_path() {
	return root_path;
}

void AnimationMultiTrackKeyEdit::set_use_fps(bool p_enable) {
	use_fps = p_enable;
	notify_property_list_changed();
}

void AnimationTimelineEdit::_zoom_changed(double) {
	double zoom_pivot = 0; // Point on timeline to stay fixed.
	double zoom_pivot_delta = 0; // Delta seconds from left-most point on timeline to zoom pivot.

	int timeline_width_pixels = get_size().width - get_buttons_width() - get_name_limit();
	double timeline_width_seconds = timeline_width_pixels / last_zoom_scale; // Length (in seconds) of visible part of timeline before zoom.
	double updated_timeline_width_seconds = timeline_width_pixels / get_zoom_scale(); // Length after zoom.
	double updated_timeline_half_width = updated_timeline_width_seconds / 2.0;
	bool zooming = updated_timeline_width_seconds < timeline_width_seconds;

	double timeline_left = get_value();
	double timeline_right = timeline_left + timeline_width_seconds;
	double timeline_center = timeline_left + timeline_width_seconds / 2.0;

	if (zoom_callback_occured) { // Zooming with scroll wheel will focus on the position of the mouse.
		double zoom_scroll_origin_norm = (zoom_scroll_origin.x - get_name_limit()) / timeline_width_pixels;
		zoom_scroll_origin_norm = MAX(zoom_scroll_origin_norm, 0);
		zoom_pivot = timeline_left + timeline_width_seconds * zoom_scroll_origin_norm;
		zoom_pivot_delta = updated_timeline_width_seconds * zoom_scroll_origin_norm;
		zoom_callback_occured = false;
	} else { // Zooming with slider will depend on the current play position.
		// If the play position is not in range, or exactly in the center, zoom in on the center.
		if (get_play_position() < timeline_left || get_play_position() > timeline_left + timeline_width_seconds || get_play_position() == timeline_center) {
			zoom_pivot = timeline_center;
			zoom_pivot_delta = updated_timeline_half_width;
		}
		// Zoom from right if play position is right of center,
		// and shrink from right if play position is left of center.
		else if ((get_play_position() > timeline_center) == zooming) {
			// If play position crosses to other side of center, center it.
			bool center_passed = (get_play_position() < timeline_right - updated_timeline_half_width) == zooming;
			zoom_pivot = center_passed ? get_play_position() : timeline_right;
			double center_offset = CMP_EPSILON * (zooming ? 1 : -1); // Small offset to prevent crossover.
			zoom_pivot_delta = center_passed ? updated_timeline_half_width + center_offset : updated_timeline_width_seconds;
		}
		// Zoom from left if play position is left of center,
		// and shrink from left if play position is right of center.
		else if ((get_play_position() <= timeline_center) == zooming) {
			// If play position crosses to other side of center, center it.
			bool center_passed = (get_play_position() > timeline_left + updated_timeline_half_width) == zooming;
			zoom_pivot = center_passed ? get_play_position() : timeline_left;
			double center_offset = CMP_EPSILON * (zooming ? -1 : 1); // Small offset to prevent crossover.
			zoom_pivot_delta = center_passed ? updated_timeline_half_width + center_offset : 0;
		}
	}

	double hscroll_pos = zoom_pivot - zoom_pivot_delta;
	hscroll_pos = CLAMP(hscroll_pos, hscroll->get_min(), hscroll->get_max());

	hscroll->set_value(hscroll_pos);
	hscroll_on_zoom_buffer = hscroll_pos; // In case of page update.
	last_zoom_scale = get_zoom_scale();

	queue_redraw();
	play_position->queue_redraw();
	emit_signal(SNAME("zoom_changed"));
}

float AnimationTimelineEdit::get_zoom_scale() const {
	return _get_zoom_scale(zoom->get_value());
}

float AnimationTimelineEdit::_get_zoom_scale(double p_zoom_value) const {
	float zv = zoom->get_max() - p_zoom_value;
	if (zv < 1) {
		zv = 1.0 - zv;
		return Math::pow(1.0f + zv, 8.0f) * 100;
	} else {
		return 1.0 / Math::pow(zv, 8.0f) * 100;
	}
}

void AnimationTimelineEdit::_anim_length_changed(double p_new_len) {
	if (editing) {
		return;
	}

	p_new_len = MAX(SECOND_DECIMAL, p_new_len);
	if (use_fps && animation->get_step() > 0) {
		p_new_len *= animation->get_step();
	}

	editing = true;
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Change Animation Length"), UndoRedo::MERGE_ENDS);
	undo_redo->add_do_method(animation.ptr(), "set_length", p_new_len);
	undo_redo->add_undo_method(animation.ptr(), "set_length", animation->get_length());
	undo_redo->commit_action();
	editing = false;
	queue_redraw();

	emit_signal(SNAME("length_changed"), p_new_len);
}

void AnimationTimelineEdit::_anim_loop_pressed() {
	if (!read_only) {
		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
		undo_redo->create_action(TTR("Change Animation Loop"));
		switch (animation->get_loop_mode()) {
			case Animation::LOOP_NONE: {
				undo_redo->add_do_method(animation.ptr(), "set_loop_mode", Animation::LOOP_LINEAR);
			} break;
			case Animation::LOOP_LINEAR: {
				undo_redo->add_do_method(animation.ptr(), "set_loop_mode", Animation::LOOP_PINGPONG);
			} break;
			case Animation::LOOP_PINGPONG: {
				undo_redo->add_do_method(animation.ptr(), "set_loop_mode", Animation::LOOP_NONE);
			} break;
			default:
				break;
		}
		undo_redo->add_do_method(this, "update_values");
		undo_redo->add_undo_method(animation.ptr(), "set_loop_mode", animation->get_loop_mode());
		undo_redo->add_undo_method(this, "update_values");
		undo_redo->commit_action();
	} else {
		String base_path = animation->get_path();
		if (FileAccess::exists(base_path + ".import")) {
			EditorNode::get_singleton()->show_warning(TTR("Can't change loop mode on animation instanced from imported scene."));
		} else {
			EditorNode::get_singleton()->show_warning(TTR("Can't change loop mode on animation embedded in another scene."));
		}
		update_values();
	}
}

int AnimationTimelineEdit::get_buttons_width() const {
	Ref<Texture2D> interp_mode = get_editor_theme_icon(SNAME("TrackContinuous"));
	Ref<Texture2D> interp_type = get_editor_theme_icon(SNAME("InterpRaw"));
	Ref<Texture2D> loop_type = get_editor_theme_icon(SNAME("InterpWrapClamp"));
	Ref<Texture2D> remove_icon = get_editor_theme_icon(SNAME("Remove"));
	Ref<Texture2D> down_icon = get_theme_icon(SNAME("select_arrow"), SNAME("Tree"));

	int total_w = interp_mode->get_width() + interp_type->get_width() + loop_type->get_width() + remove_icon->get_width();
	total_w += (down_icon->get_width() + 4 * EDSCALE) * 4;

	return total_w;
}

int AnimationTimelineEdit::get_name_limit() const {
	Ref<Texture2D> hsize_icon = get_editor_theme_icon(SNAME("Hsize"));

	int limit = MAX(name_limit, add_track->get_minimum_size().width + hsize_icon->get_width());

	limit = MIN(limit, get_size().width - get_buttons_width() - 1);

	return limit;
}

void AnimationTimelineEdit::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_ENTER_TREE:
		case NOTIFICATION_THEME_CHANGED: {
			add_track->set_icon(get_editor_theme_icon(SNAME("Add")));
			loop->set_icon(get_editor_theme_icon(SNAME("Loop")));
			time_icon->set_texture(get_editor_theme_icon(SNAME("Time")));

			add_track->get_popup()->clear();
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyValue")), TTR("Property Track..."));
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyXPosition")), TTR("3D Position Track..."));
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyXRotation")), TTR("3D Rotation Track..."));
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyXScale")), TTR("3D Scale Track..."));
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyBlendShape")), TTR("Blend Shape Track..."));
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyCall")), TTR("Call Method Track..."));
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyBezier")), TTR("Bezier Curve Track..."));
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyAudio")), TTR("Audio Playback Track..."));
			add_track->get_popup()->add_icon_item(get_editor_theme_icon(SNAME("KeyAnimation")), TTR("Animation Playback Track..."));
		} break;

		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
			if (EditorSettings::get_singleton()->check_changed_settings_in_group("editors/panning")) {
				panner->setup((ViewPanner::ControlScheme)EDITOR_GET("editors/panning/animation_editors_panning_scheme").operator int(), ED_GET_SHORTCUT("canvas_item_editor/pan_view"), bool(EDITOR_GET("editors/panning/simple_panning")));
			}
		} break;

		case NOTIFICATION_RESIZED: {
			len_hb->set_position(Vector2(get_size().width - get_buttons_width(), 0));
			len_hb->set_size(Size2(get_buttons_width(), get_size().height));
		} break;

		case NOTIFICATION_DRAW: {
			int key_range = get_size().width - get_buttons_width() - get_name_limit();

			if (!animation.is_valid()) {
				return;
			}

			Ref<Font> font = get_theme_font(SceneStringName(font), SNAME("Label"));
			int font_size = get_theme_font_size(SceneStringName(font_size), SNAME("Label"));
			Color color = get_theme_color(SceneStringName(font_color), SNAME("Label"));

			int zoomw = key_range;
			float scale = get_zoom_scale();
			int h = get_size().height;

			float l = animation->get_length();
			if (l <= 0) {
				l = SECOND_DECIMAL; // Avoid crashor.
			}

			Ref<Texture2D> hsize_icon = get_editor_theme_icon(SNAME("Hsize"));
			hsize_rect = Rect2(get_name_limit() - hsize_icon->get_width() - 2 * EDSCALE, (get_size().height - hsize_icon->get_height()) / 2, hsize_icon->get_width(), hsize_icon->get_height());
			draw_texture(hsize_icon, hsize_rect.position);

			{
				float time_min = 0;
				float time_max = animation->get_length();
				for (int i = 0; i < animation->get_track_count(); i++) {
					if (animation->track_get_key_count(i) > 0) {
						float beg = animation->track_get_key_time(i, 0);

						if (beg < time_min) {
							time_min = beg;
						}

						float end = animation->track_get_key_time(i, animation->track_get_key_count(i) - 1);

						if (end > time_max) {
							time_max = end;
						}
					}
				}

				float extra = (zoomw / scale) * 0.5;

				time_max += extra;
				set_min(time_min);
				set_max(time_max);

				if (zoomw / scale < (time_max - time_min)) {
					hscroll->show();

				} else {
					hscroll->hide();
				}
			}

			set_page(zoomw / scale);

			if (hscroll->is_visible() && hscroll_on_zoom_buffer >= 0) {
				hscroll->set_value(hscroll_on_zoom_buffer);
				hscroll_on_zoom_buffer = -1.0;
			}

			int end_px = (l - get_value()) * scale;
			int begin_px = -get_value() * scale;
			Color notimecol = get_theme_color(SNAME("dark_color_2"), EditorStringName(Editor));
			Color timecolor = color;
			timecolor.a = 0.2;
			Color linecolor = color;
			linecolor.a = 0.2;

			{
				draw_rect(Rect2(Point2(get_name_limit(), 0), Point2(zoomw - 1, h)), notimecol);

				if (begin_px < zoomw && end_px > 0) {
					if (begin_px < 0) {
						begin_px = 0;
					}
					if (end_px > zoomw) {
						end_px = zoomw;
					}

					draw_rect(Rect2(Point2(get_name_limit() + begin_px, 0), Point2(end_px - begin_px, h)), timecolor);
				}
			}

			Color color_time_sec = color;
			Color color_time_dec = color;
			color_time_dec.a *= 0.5;
#define SC_ADJ 100
			int dec = 1;
			int step = 1;
			int decimals = 2;
			bool step_found = false;

			const float period_width = font->get_char_size('.', font_size).width;
			float max_digit_width = font->get_char_size('0', font_size).width;
			for (int i = 1; i <= 9; i++) {
				const float digit_width = font->get_char_size('0' + i, font_size).width;
				max_digit_width = MAX(digit_width, max_digit_width);
			}
			const int max_sc = int(Math::ceil(zoomw / scale));
			const int max_sc_width = String::num(max_sc).length() * max_digit_width;

			while (!step_found) {
				int min = max_sc_width;
				if (decimals > 0) {
					min += period_width + max_digit_width * decimals;
				}

				static const int _multp[3] = { 1, 2, 5 };
				for (int i = 0; i < 3; i++) {
					step = (_multp[i] * dec);
					if (step * scale / SC_ADJ > min) {
						step_found = true;
						break;
					}
				}
				if (step_found) {
					break;
				}
				dec *= 10;
				decimals--;
				if (decimals < 0) {
					decimals = 0;
				}
			}

			if (use_fps) {
				float step_size = animation->get_step();
				if (step_size > 0) {
					int prev_frame_ofs = -10000000;

					for (int i = 0; i < zoomw; i++) {
						float pos = get_value() + double(i) / scale;
						float prev = get_value() + (double(i) - 1.0) / scale;

						int frame = pos / step_size;
						int prev_frame = prev / step_size;

						bool sub = Math::floor(prev) == Math::floor(pos);

						if (frame != prev_frame && i >= prev_frame_ofs) {
							draw_line(Point2(get_name_limit() + i, 0), Point2(get_name_limit() + i, h), linecolor, Math::round(EDSCALE));

							draw_string(font, Point2(get_name_limit() + i + 3 * EDSCALE, (h - font->get_height(font_size)) / 2 + font->get_ascent(font_size)).floor(), itos(frame), HORIZONTAL_ALIGNMENT_LEFT, zoomw - i, font_size, sub ? color_time_dec : color_time_sec);
							prev_frame_ofs = i + font->get_string_size(itos(frame), HORIZONTAL_ALIGNMENT_LEFT, -1, font_size).x + 5 * EDSCALE;
						}
					}
				}

			} else {
				for (int i = 0; i < zoomw; i++) {
					float pos = get_value() + double(i) / scale;
					float prev = get_value() + (double(i) - 1.0) / scale;

					int sc = int(Math::floor(pos * SC_ADJ));
					int prev_sc = int(Math::floor(prev * SC_ADJ));
					bool sub = (sc % SC_ADJ);

					if ((sc / step) != (prev_sc / step) || (prev_sc < 0 && sc >= 0)) {
						int scd = sc < 0 ? prev_sc : sc;
						draw_line(Point2(get_name_limit() + i, 0), Point2(get_name_limit() + i, h), linecolor, Math::round(EDSCALE));
						draw_string(font, Point2(get_name_limit() + i + 3, (h - font->get_height(font_size)) / 2 + font->get_ascent(font_size)).floor(), String::num((scd - (scd % step)) / double(SC_ADJ), decimals), HORIZONTAL_ALIGNMENT_LEFT, zoomw - i, font_size, sub ? color_time_dec : color_time_sec);
					}
				}
			}

			draw_line(Vector2(0, get_size().height), get_size(), linecolor, Math::round(EDSCALE));
			update_values();
		} break;
	}
}

void AnimationTimelineEdit::set_animation(const Ref<Animation> &p_animation, bool p_read_only) {
	animation = p_animation;
	read_only = p_read_only;

	length->set_read_only(read_only);

	if (animation.is_valid()) {
		len_hb->show();
		if (read_only) {
			add_track->hide();
		} else {
			add_track->show();
		}
		play_position->show();
	} else {
		len_hb->hide();
		add_track->hide();
		play_position->hide();
	}
	queue_redraw();
}

Size2 AnimationTimelineEdit::get_minimum_size() const {
	Size2 ms = add_track->get_minimum_size();
	Ref<Font> font = get_theme_font(SceneStringName(font), SNAME("Label"));
	int font_size = get_theme_font_size(SceneStringName(font_size), SNAME("Label"));
	ms.height = MAX(ms.height, font->get_height(font_size));
	ms.width = get_buttons_width() + add_track->get_minimum_size().width + get_editor_theme_icon(SNAME("Hsize"))->get_width() + 2;
	return ms;
}

void AnimationTimelineEdit::set_zoom(Range *p_zoom) {
	zoom = p_zoom;
	zoom->connect(SceneStringName(value_changed), callable_mp(this, &AnimationTimelineEdit::_zoom_changed));
}

void AnimationTimelineEdit::auto_fit() {
	if (!animation.is_valid()) {
		return;
	}

	float anim_end = animation->get_length();
	float anim_start = 0;

	// Search for keyframe outside animation boundaries to include keyframes before animation start and after animation length.
	int track_count = animation->get_track_count();
	for (int track = 0; track < track_count; ++track) {
		for (int i = 0; i < animation->track_get_key_count(track); i++) {
			float key_time = animation->track_get_key_time(track, i);
			if (key_time > anim_end) {
				anim_end = key_time;
			}
			if (key_time < anim_start) {
				anim_start = key_time;
			}
		}
	}

	float anim_length = anim_end - anim_start;
	int timeline_width_pixels = get_size().width - get_buttons_width() - get_name_limit();

	// I want a little buffer at the end... (5% looks nice and we should keep some space for the bezier handles)
	timeline_width_pixels *= 0.95;

	// The technique is to reuse the _get_zoom_scale function directly to be sure that the auto_fit is always calculated
	// the same way as the zoom slider. It's a little bit more calculation then doing the inverse of get_zoom_scale but
	// it's really easier to understand and should always be accurate.
	float new_zoom = zoom->get_max();
	while (true) {
		double test_zoom_scale = _get_zoom_scale(new_zoom);

		if (anim_length * test_zoom_scale <= timeline_width_pixels) {
			// It fits...
			break;
		}

		new_zoom -= zoom->get_step();

		if (new_zoom <= zoom->get_min()) {
			new_zoom = zoom->get_min();
			break;
		}
	}

	// Horizontal scroll to get_min which should include keyframes that are before the animation start.
	hscroll->set_value(hscroll->get_min());
	// Set the zoom value... the signal value_changed will be emitted and the timeline will be refreshed correctly!
	zoom->set_value(new_zoom);
	// The new zoom value must be applied correctly so the scrollbar are updated before we move the scrollbar to
	// the beginning of the animation, hence the call deferred.
	callable_mp(this, &AnimationTimelineEdit::_scroll_to_start).call_deferred();
}

void AnimationTimelineEdit::_scroll_to_start() {
	// Horizontal scroll to get_min which should include keyframes that are before the animation start.
	hscroll->set_value(hscroll->get_min());
}

void AnimationTimelineEdit::set_track_edit(AnimationTrackEdit *p_track_edit) {
	track_edit = p_track_edit;
}

void AnimationTimelineEdit::set_play_position(float p_pos) {
	play_position_pos = p_pos;
	play_position->queue_redraw();
}

float AnimationTimelineEdit::get_play_position() const {
	return play_position_pos;
}

void AnimationTimelineEdit::update_play_position() {
	play_position->queue_redraw();
}

void AnimationTimelineEdit::update_values() {
	if (!animation.is_valid() || editing) {
		return;
	}

	editing = true;
	if (use_fps && animation->get_step() > 0) {
		length->set_value(animation->get_length() / animation->get_step());
		length->set_step(FPS_DECIMAL);
		length->set_tooltip_text(TTR("Animation length (frames)"));
		time_icon->set_tooltip_text(TTR("Animation length (frames)"));
		if (track_edit) {
			track_edit->editor->_update_key_edit();
		}
	} else {
		length->set_value(animation->get_length());
		length->set_step(SECOND_DECIMAL);
		length->set_tooltip_text(TTR("Animation length (seconds)"));
		time_icon->set_tooltip_text(TTR("Animation length (seconds)"));
	}

	switch (animation->get_loop_mode()) {
		case Animation::LOOP_NONE: {
			loop->set_icon(get_editor_theme_icon(SNAME("Loop")));
			loop->set_pressed(false);
		} break;
		case Animation::LOOP_LINEAR: {
			loop->set_icon(get_editor_theme_icon(SNAME("Loop")));
			loop->set_pressed(true);
		} break;
		case Animation::LOOP_PINGPONG: {
			loop->set_icon(get_editor_theme_icon(SNAME("PingPongLoop")));
			loop->set_pressed(true);
		} break;
		default:
			break;
	}

	editing = false;
}

void AnimationTimelineEdit::_play_position_draw() {
	if (!animation.is_valid() || play_position_pos < 0) {
		return;
	}

	float scale = get_zoom_scale();
	int h = play_position->get_size().height;

	int px = (-get_value() + play_position_pos) * scale + get_name_limit();

	if (px >= get_name_limit() && px < (play_position->get_size().width - get_buttons_width())) {
		Color color = get_theme_color(SNAME("accent_color"), EditorStringName(Editor));
		play_position->draw_line(Point2(px, 0), Point2(px, h), color, Math::round(2 * EDSCALE));
		play_position->draw_texture(
				get_editor_theme_icon(SNAME("TimelineIndicator")),
				Point2(px - get_editor_theme_icon(SNAME("TimelineIndicator"))->get_width() * 0.5, 0),
				color);
	}
}

void AnimationTimelineEdit::gui_input(const Ref<InputEvent> &p_event) {
	ERR_FAIL_COND(p_event.is_null());

	if (panner->gui_input(p_event)) {
		accept_event();
		return;
	}

	const Ref<InputEventMouseButton> mb = p_event;

	if (mb.is_valid() && mb->is_pressed() && mb->is_alt_pressed() && mb->get_button_index() == MouseButton::WHEEL_UP) {
		if (track_edit) {
			track_edit->get_editor()->goto_prev_step(true);
		}
		accept_event();
	}

	if (mb.is_valid() && mb->is_pressed() && mb->is_alt_pressed() && mb->get_button_index() == MouseButton::WHEEL_DOWN) {
		if (track_edit) {
			track_edit->get_editor()->goto_next_step(true);
		}
		accept_event();
	}

	if (mb.is_valid() && mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT && hsize_rect.has_point(mb->get_position())) {
		dragging_hsize = true;
		dragging_hsize_from = mb->get_position().x;
		dragging_hsize_at = name_limit;
	}

	if (mb.is_valid() && !mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT && dragging_hsize) {
		dragging_hsize = false;
	}
	if (mb.is_valid() && mb->get_position().x > get_name_limit() && mb->get_position().x < (get_size().width - get_buttons_width())) {
		if (!panner->is_panning() && mb->get_button_index() == MouseButton::LEFT) {
			int x = mb->get_position().x - get_name_limit();

			float ofs = x / get_zoom_scale() + get_value();
			emit_signal(SNAME("timeline_changed"), ofs, mb->is_alt_pressed());
			dragging_timeline = true;
		}
	}

	if (dragging_timeline && mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && !mb->is_pressed()) {
		dragging_timeline = false;
	}

	Ref<InputEventMouseMotion> mm = p_event;

	if (mm.is_valid()) {
		if (dragging_hsize) {
			int ofs = mm->get_position().x - dragging_hsize_from;
			name_limit = dragging_hsize_at + ofs;
			queue_redraw();
			emit_signal(SNAME("name_limit_changed"));
			play_position->queue_redraw();
		}
		if (dragging_timeline) {
			int x = mm->get_position().x - get_name_limit();
			float ofs = x / get_zoom_scale() + get_value();
			emit_signal(SNAME("timeline_changed"), ofs, mm->is_alt_pressed());
		}
	}
}

Control::CursorShape AnimationTimelineEdit::get_cursor_shape(const Point2 &p_pos) const {
	if (dragging_hsize || hsize_rect.has_point(p_pos)) {
		// Indicate that the track name column's width can be adjusted
		return Control::CURSOR_HSIZE;
	} else {
		return get_default_cursor_shape();
	}
}

void AnimationTimelineEdit::_pan_callback(Vector2 p_scroll_vec, Ref<InputEvent> p_event) {
	set_value(get_value() - p_scroll_vec.x / get_zoom_scale());
}

void AnimationTimelineEdit::_zoom_callback(float p_zoom_factor, Vector2 p_origin, Ref<InputEvent> p_event) {
	double current_zoom_value = get_zoom()->get_value();
	zoom_scroll_origin = p_origin;
	zoom_callback_occured = true;
	get_zoom()->set_value(MAX(0.01, current_zoom_value - (1.0 - p_zoom_factor)));
}

void AnimationTimelineEdit::set_use_fps(bool p_use_fps) {
	use_fps = p_use_fps;
	queue_redraw();
}

bool AnimationTimelineEdit::is_using_fps() const {
	return use_fps;
}

void AnimationTimelineEdit::set_hscroll(HScrollBar *p_hscroll) {
	hscroll = p_hscroll;
}

void AnimationTimelineEdit::_track_added(int p_track) {
	emit_signal(SNAME("track_added"), p_track);
}

void AnimationTimelineEdit::_bind_methods() {
	ADD_SIGNAL(MethodInfo("zoom_changed"));
	ADD_SIGNAL(MethodInfo("name_limit_changed"));
	ADD_SIGNAL(MethodInfo("timeline_changed", PropertyInfo(Variant::FLOAT, "position"), PropertyInfo(Variant::BOOL, "timeline_only")));
	ADD_SIGNAL(MethodInfo("track_added", PropertyInfo(Variant::INT, "track")));
	ADD_SIGNAL(MethodInfo("length_changed", PropertyInfo(Variant::FLOAT, "size")));

	ClassDB::bind_method(D_METHOD("update_values"), &AnimationTimelineEdit::update_values);
}

AnimationTimelineEdit::AnimationTimelineEdit() {
	name_limit = 150 * EDSCALE;

	play_position = memnew(Control);
	play_position->set_mouse_filter(MOUSE_FILTER_PASS);
	add_child(play_position);
	play_position->set_anchors_and_offsets_preset(PRESET_FULL_RECT);
	play_position->connect(SceneStringName(draw), callable_mp(this, &AnimationTimelineEdit::_play_position_draw));

	add_track = memnew(MenuButton);
	add_track->set_position(Vector2(0, 0));
	add_child(add_track);
	add_track->set_text(TTR("Add Track"));

	len_hb = memnew(HBoxContainer);

	Control *expander = memnew(Control);
	expander->set_h_size_flags(SIZE_EXPAND_FILL);
	len_hb->add_child(expander);
	time_icon = memnew(TextureRect);
	time_icon->set_v_size_flags(SIZE_SHRINK_CENTER);
	time_icon->set_tooltip_text(TTR("Animation length (seconds)"));
	len_hb->add_child(time_icon);
	length = memnew(EditorSpinSlider);
	length->set_min(SECOND_DECIMAL);
	length->set_max(36000);
	length->set_step(SECOND_DECIMAL);
	length->set_allow_greater(true);
	length->set_custom_minimum_size(Vector2(70 * EDSCALE, 0));
	length->set_hide_slider(true);
	length->set_tooltip_text(TTR("Animation length (seconds)"));
	length->connect(SceneStringName(value_changed), callable_mp(this, &AnimationTimelineEdit::_anim_length_changed));
	len_hb->add_child(length);
	loop = memnew(Button);
	loop->set_flat(true);
	loop->set_tooltip_text(TTR("Animation Looping"));
	loop->connect(SceneStringName(pressed), callable_mp(this, &AnimationTimelineEdit::_anim_loop_pressed));
	loop->set_toggle_mode(true);
	len_hb->add_child(loop);
	add_child(len_hb);

	add_track->hide();
	add_track->get_popup()->connect("index_pressed", callable_mp(this, &AnimationTimelineEdit::_track_added));
	len_hb->hide();

	panner.instantiate();
	panner->set_scroll_zoom_factor(SCROLL_ZOOM_FACTOR_IN);
	panner->set_callbacks(callable_mp(this, &AnimationTimelineEdit::_pan_callback), callable_mp(this, &AnimationTimelineEdit::_zoom_callback));
	panner->set_pan_axis(ViewPanner::PAN_AXIS_HORIZONTAL);

	set_layout_direction(Control::LAYOUT_DIRECTION_LTR);
}

////////////////////////////////////

void AnimationTrackEdit::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_THEME_CHANGED: {
			if (animation.is_null()) {
				return;
			}
			ERR_FAIL_INDEX(track, animation->get_track_count());

			type_icon = _get_key_type_icon();
			selected_icon = get_editor_theme_icon(SNAME("KeySelected"));
		} break;

		case NOTIFICATION_DRAW: {
			if (animation.is_null()) {
				return;
			}
			ERR_FAIL_INDEX(track, animation->get_track_count());

			int limit = timeline->get_name_limit();

			if (track % 2 == 1) {
				// Draw a background over odd lines to make long lists of tracks easier to read.
				draw_rect(Rect2(Point2(1 * EDSCALE, 0), get_size() - Size2(1 * EDSCALE, 0)), Color(0.5, 0.5, 0.5, 0.05));
			}

			if (hovered) {
				// Draw hover feedback.
				draw_rect(Rect2(Point2(1 * EDSCALE, 0), get_size() - Size2(1 * EDSCALE, 0)), Color(0.5, 0.5, 0.5, 0.1));
			}

			if (has_focus()) {
				Color accent = get_theme_color(SNAME("accent_color"), EditorStringName(Editor));
				accent.a *= 0.7;
				// Offside so the horizontal sides aren't cutoff.
				draw_style_box(get_theme_stylebox(SNAME("Focus"), EditorStringName(EditorStyles)), Rect2(Point2(1 * EDSCALE, 0), get_size() - Size2(1 * EDSCALE, 0)));
			}

			Ref<Font> font = get_theme_font(SceneStringName(font), SNAME("Label"));
			int font_size = get_theme_font_size(SceneStringName(font_size), SNAME("Label"));
			Color color = get_theme_color(SceneStringName(font_color), SNAME("Label"));
			int hsep = get_theme_constant(SNAME("h_separation"), SNAME("ItemList"));
			Color linecolor = color;
			linecolor.a = 0.2;

			Color dc = get_theme_color(SNAME("font_disabled_color"), EditorStringName(Editor));

			// NAMES AND ICONS //

			{
				Ref<Texture2D> check = animation->track_is_enabled(track) ? get_theme_icon(SNAME("checked"), SNAME("CheckBox")) : get_theme_icon(SNAME("unchecked"), SNAME("CheckBox"));

				int ofs = in_group ? check->get_width() : 0; // Not the best reference for margin but..

				check_rect = Rect2(Point2(ofs, int(get_size().height - check->get_height()) / 2), check->get_size());
				draw_texture(check, check_rect.position);
				ofs += check->get_width() + hsep;

				Ref<Texture2D> key_type_icon = _get_key_type_icon();
				draw_texture(key_type_icon, Point2(ofs, int(get_size().height - key_type_icon->get_height()) / 2));
				ofs += key_type_icon->get_width() + hsep;

				NodePath anim_path = animation->track_get_path(track);
				Node *node = nullptr;
				if (root) {
					node = root->get_node_or_null(anim_path);
				}

				String text;
				Color text_color = color;
				if (node && EditorNode::get_singleton()->get_editor_selection()->is_selected(node)) {
					text_color = get_theme_color(SNAME("accent_color"), EditorStringName(Editor));
				}

				if (in_group) {
					if (animation->track_get_type(track) == Animation::TYPE_METHOD) {
						text = TTR("Functions:");
					} else if (animation->track_get_type(track) == Animation::TYPE_AUDIO) {
						text = TTR("Audio Clips:");
					} else if (animation->track_get_type(track) == Animation::TYPE_ANIMATION) {
						text = TTR("Animation Clips:");
					} else {
						text += anim_path.get_concatenated_subnames();
					}
					text_color.a *= 0.7;
				} else if (node) {
					Ref<Texture2D> icon = EditorNode::get_singleton()->get_object_icon(node, "Node");
					const Vector2 icon_size = Vector2(1, 1) * get_theme_constant(SNAME("class_icon_size"), EditorStringName(Editor));

					draw_texture_rect(icon, Rect2(Point2(ofs, int(get_size().height - icon_size.y) / 2), icon_size));
					icon_cache = icon;

					text = String() + node->get_name() + ":" + anim_path.get_concatenated_subnames();
					ofs += hsep;
					ofs += icon_size.x;

				} else {
					icon_cache = key_type_icon;

					text = anim_path;
				}

				path_cache = text;

				path_rect = Rect2(ofs, 0, limit - ofs - hsep, get_size().height);

				Vector2 string_pos = Point2(ofs, (get_size().height - font->get_height(font_size)) / 2 + font->get_ascent(font_size));
				string_pos = string_pos.floor();
				draw_string(font, string_pos, text, HORIZONTAL_ALIGNMENT_LEFT, limit - ofs - hsep, font_size, text_color);

				draw_line(Point2(limit, 0), Point2(limit, get_size().height), linecolor, Math::round(EDSCALE));
			}

			// KEYFRAMES //

			draw_bg(limit, get_size().width - timeline->get_buttons_width());

			{
				float scale = timeline->get_zoom_scale();
				int limit_end = get_size().width - timeline->get_buttons_width();

				for (int i = 0; i < animation->track_get_key_count(track); i++) {
					float offset = animation->track_get_key_time(track, i) - timeline->get_value();
					if (editor->is_key_selected(track, i) && editor->is_moving_selection()) {
						offset = offset + editor->get_moving_selection_offset();
					}
					offset = offset * scale + limit;
					if (i < animation->track_get_key_count(track) - 1) {
						float offset_n = animation->track_get_key_time(track, i + 1) - timeline->get_value();
						if (editor->is_key_selected(track, i + 1) && editor->is_moving_selection()) {
							offset_n = offset_n + editor->get_moving_selection_offset();
						}
						offset_n = offset_n * scale + limit;

						draw_key_link(i, scale, int(offset), int(offset_n), limit, limit_end);
					}

					draw_key(i, scale, int(offset), editor->is_key_selected(track, i), limit, limit_end);
				}
			}

			draw_fg(limit, get_size().width - timeline->get_buttons_width());

			// BUTTONS //

			{
				Ref<Texture2D> wrap_icon[2] = {
					get_editor_theme_icon(SNAME("InterpWrapClamp")),
					get_editor_theme_icon(SNAME("InterpWrapLoop")),
				};
				Ref<Texture2D> interp_icon[5] = {
					get_editor_theme_icon(SNAME("InterpRaw")),
					get_editor_theme_icon(SNAME("InterpLinear")),
					get_editor_theme_icon(SNAME("InterpCubic")),
					get_editor_theme_icon(SNAME("InterpLinearAngle")),
					get_editor_theme_icon(SNAME("InterpCubicAngle")),
				};
				Ref<Texture2D> cont_icon[3] = {
					get_editor_theme_icon(SNAME("TrackContinuous")),
					get_editor_theme_icon(SNAME("TrackDiscrete")),
					get_editor_theme_icon(SNAME("TrackCapture"))
				};
				Ref<Texture2D> blend_icon[2] = {
					get_editor_theme_icon(SNAME("UseBlendEnable")),
					get_editor_theme_icon(SNAME("UseBlendDisable")),
				};

				int ofs = get_size().width - timeline->get_buttons_width();

				Ref<Texture2D> down_icon = get_theme_icon(SNAME("select_arrow"), SNAME("Tree"));

				draw_line(Point2(ofs, 0), Point2(ofs, get_size().height), linecolor, Math::round(EDSCALE));

				ofs += hsep;
				{
					// Callmode.

					Animation::UpdateMode update_mode;

					if (animation->track_get_type(track) == Animation::TYPE_VALUE) {
						update_mode = animation->value_track_get_update_mode(track);
					} else {
						update_mode = Animation::UPDATE_CONTINUOUS;
					}

					Ref<Texture2D> update_icon = cont_icon[update_mode];

					update_mode_rect.position.x = ofs;
					update_mode_rect.position.y = int(get_size().height - update_icon->get_height()) / 2;
					update_mode_rect.size = update_icon->get_size();

					if (!animation->track_is_compressed(track) && animation->track_get_type(track) == Animation::TYPE_VALUE) {
						draw_texture(update_icon, update_mode_rect.position);
					}
					if (animation->track_get_type(track) == Animation::TYPE_AUDIO) {
						Ref<Texture2D> use_blend_icon = blend_icon[animation->audio_track_is_use_blend(track) ? 0 : 1];
						Vector2 use_blend_icon_pos = update_mode_rect.position + (update_mode_rect.size - use_blend_icon->get_size()) / 2;
						draw_texture(use_blend_icon, use_blend_icon_pos);
					}
					// Make it easier to click.
					update_mode_rect.position.y = 0;
					update_mode_rect.size.y = get_size().height;

					ofs += update_icon->get_width() + hsep / 2;
					update_mode_rect.size.x += hsep / 2;

					if (!read_only) {
						if (animation->track_get_type(track) == Animation::TYPE_VALUE || animation->track_get_type(track) == Animation::TYPE_AUDIO) {
							draw_texture(down_icon, Vector2(ofs, int(get_size().height - down_icon->get_height()) / 2));
							update_mode_rect.size.x += down_icon->get_width();
						} else if (animation->track_get_type(track) == Animation::TYPE_BEZIER) {
							update_mode_rect.size.x += down_icon->get_width();
							update_mode_rect = Rect2();
						} else {
							update_mode_rect = Rect2();
						}
					} else {
						update_mode_rect = Rect2();
					}

					ofs += down_icon->get_width();
					draw_line(Point2(ofs + hsep * 0.5, 0), Point2(ofs + hsep * 0.5, get_size().height), linecolor, Math::round(EDSCALE));
					ofs += hsep;
				}

				{
					// Interp.

					Animation::InterpolationType interp_mode = animation->track_get_interpolation_type(track);

					Ref<Texture2D> icon = interp_icon[interp_mode];

					interp_mode_rect.position.x = ofs;
					interp_mode_rect.position.y = int(get_size().height - icon->get_height()) / 2;
					interp_mode_rect.size = icon->get_size();

					if (!animation->track_is_compressed(track) && (animation->track_get_type(track) == Animation::TYPE_VALUE || animation->track_get_type(track) == Animation::TYPE_BLEND_SHAPE || animation->track_get_type(track) == Animation::TYPE_POSITION_3D || animation->track_get_type(track) == Animation::TYPE_SCALE_3D || animation->track_get_type(track) == Animation::TYPE_ROTATION_3D)) {
						draw_texture(icon, interp_mode_rect.position);
					}
					// Make it easier to click.
					interp_mode_rect.position.y = 0;
					interp_mode_rect.size.y = get_size().height;

					ofs += icon->get_width() + hsep / 2;
					interp_mode_rect.size.x += hsep / 2;

					if (!read_only && !animation->track_is_compressed(track) && (animation->track_get_type(track) == Animation::TYPE_VALUE || animation->track_get_type(track) == Animation::TYPE_BLEND_SHAPE || animation->track_get_type(track) == Animation::TYPE_POSITION_3D || animation->track_get_type(track) == Animation::TYPE_SCALE_3D || animation->track_get_type(track) == Animation::TYPE_ROTATION_3D)) {
						draw_texture(down_icon, Vector2(ofs, int(get_size().height - down_icon->get_height()) / 2));
						interp_mode_rect.size.x += down_icon->get_width();
					} else {
						interp_mode_rect = Rect2();
					}

					ofs += down_icon->get_width();
					draw_line(Point2(ofs + hsep * 0.5, 0), Point2(ofs + hsep * 0.5, get_size().height), linecolor, Math::round(EDSCALE));
					ofs += hsep;
				}

				{
					// Loop.

					bool loop_wrap = animation->track_get_interpolation_loop_wrap(track);

					Ref<Texture2D> icon = wrap_icon[loop_wrap ? 1 : 0];

					loop_wrap_rect.position.x = ofs;
					loop_wrap_rect.position.y = int(get_size().height - icon->get_height()) / 2;
					loop_wrap_rect.size = icon->get_size();

					if (!animation->track_is_compressed(track) && (animation->track_get_type(track) == Animation::TYPE_VALUE || animation->track_get_type(track) == Animation::TYPE_BLEND_SHAPE || animation->track_get_type(track) == Animation::TYPE_POSITION_3D || animation->track_get_type(track) == Animation::TYPE_SCALE_3D || animation->track_get_type(track) == Animation::TYPE_ROTATION_3D)) {
						draw_texture(icon, loop_wrap_rect.position);
					}

					loop_wrap_rect.position.y = 0;
					loop_wrap_rect.size.y = get_size().height;

					ofs += icon->get_width() + hsep / 2;
					loop_wrap_rect.size.x += hsep / 2;

					if (!read_only && !animation->track_is_compressed(track) && (animation->track_get_type(track) == Animation::TYPE_VALUE || animation->track_get_type(track) == Animation::TYPE_BLEND_SHAPE || animation->track_get_type(track) == Animation::TYPE_POSITION_3D || animation->track_get_type(track) == Animation::TYPE_SCALE_3D || animation->track_get_type(track) == Animation::TYPE_ROTATION_3D)) {
						draw_texture(down_icon, Vector2(ofs, int(get_size().height - down_icon->get_height()) / 2));
						loop_wrap_rect.size.x += down_icon->get_width();
					} else {
						loop_wrap_rect = Rect2();
					}

					ofs += down_icon->get_width();
					draw_line(Point2(ofs + hsep * 0.5, 0), Point2(ofs + hsep * 0.5, get_size().height), linecolor, Math::round(EDSCALE));
					ofs += hsep;
				}

				{
					// Erase.

					Ref<Texture2D> icon = get_editor_theme_icon(animation->track_is_compressed(track) ? SNAME("Lock") : SNAME("Remove"));

					remove_rect.position.x = ofs + ((get_size().width - ofs) - icon->get_width());
					remove_rect.position.y = int(get_size().height - icon->get_height()) / 2;
					remove_rect.size = icon->get_size();

					if (read_only) {
						draw_texture(icon, remove_rect.position, dc);
					} else {
						draw_texture(icon, remove_rect.position);
					}
				}
			}

			if (in_group) {
				draw_line(Vector2(timeline->get_name_limit(), get_size().height), get_size(), linecolor, Math::round(EDSCALE));
			} else {
				draw_line(Vector2(0, get_size().height), get_size(), linecolor, Math::round(EDSCALE));
			}

			if (dropping_at != 0) {
				Color drop_color = get_theme_color(SNAME("accent_color"), EditorStringName(Editor));
				if (dropping_at < 0) {
					draw_line(Vector2(0, 0), Vector2(get_size().width, 0), drop_color, Math::round(EDSCALE));
				} else {
					draw_line(Vector2(0, get_size().height), get_size(), drop_color, Math::round(EDSCALE));
				}
			}
		} break;

		case NOTIFICATION_MOUSE_ENTER:
			hovered = true;
			queue_redraw();
			break;
		case NOTIFICATION_MOUSE_EXIT:
			hovered = false;
			// When the mouse cursor exits the track, we're no longer hovering any keyframe.
			hovering_key_idx = -1;
			queue_redraw();
			[[fallthrough]];
		case NOTIFICATION_DRAG_END: {
			cancel_drop();
		} break;
	}
}

int AnimationTrackEdit::get_key_height() const {
	if (!animation.is_valid()) {
		return 0;
	}

	return type_icon->get_height();
}

Rect2 AnimationTrackEdit::get_key_rect(int p_index, float p_pixels_sec) {
	if (!animation.is_valid()) {
		return Rect2();
	}
	Rect2 rect = Rect2(-type_icon->get_width() / 2, 0, type_icon->get_width(), get_size().height);

	// Make it a big easier to click.
	rect.position.x -= rect.size.x * 0.5;
	rect.size.x *= 2;
	return rect;
}

bool AnimationTrackEdit::is_key_selectable_by_distance() const {
	return true;
}

void AnimationTrackEdit::draw_key_link(int p_index, float p_pixels_sec, int p_x, int p_next_x, int p_clip_left, int p_clip_right) {
	if (p_next_x < p_clip_left) {
		return;
	}
	if (p_x > p_clip_right) {
		return;
	}

	Variant current = animation->track_get_key_value(get_track(), p_index);
	Variant next = animation->track_get_key_value(get_track(), p_index + 1);
	if (current != next || animation->track_get_type(get_track()) == Animation::TrackType::TYPE_METHOD) {
		return;
	}

	Color color = get_theme_color(SceneStringName(font_color), SNAME("Label"));
	color.a = 0.5;

	int from_x = MAX(p_x, p_clip_left);
	int to_x = MIN(p_next_x, p_clip_right);

	draw_line(Point2(from_x + 1, get_size().height / 2), Point2(to_x, get_size().height / 2), color, Math::round(2 * EDSCALE));
}

void AnimationTrackEdit::draw_key(int p_index, float p_pixels_sec, int p_x, bool p_selected, int p_clip_left, int p_clip_right) {
	if (!animation.is_valid()) {
		return;
	}

	if (p_x < p_clip_left || p_x > p_clip_right) {
		return;
	}

	Ref<Texture2D> icon_to_draw = p_selected ? selected_icon : type_icon;

	if (animation->track_get_type(track) == Animation::TYPE_VALUE && !Math::is_equal_approx(animation->track_get_key_transition(track, p_index), real_t(1.0))) {
		// Use a different icon for keys with non-linear easing.
		icon_to_draw = get_editor_theme_icon(p_selected ? SNAME("KeyEasedSelected") : SNAME("KeyValueEased"));
	}

	// Override type icon for invalid value keys, unless selected.
	if (!p_selected && animation->track_get_type(track) == Animation::TYPE_VALUE) {
		const Variant &v = animation->track_get_key_value(track, p_index);
		Variant::Type valid_type = Variant::NIL;
		if (!_is_value_key_valid(v, valid_type)) {
			icon_to_draw = get_editor_theme_icon(SNAME("KeyInvalid"));
		}
	}

	Vector2 ofs(p_x - icon_to_draw->get_width() / 2, int(get_size().height - icon_to_draw->get_height()) / 2);

	if (animation->track_get_type(track) == Animation::TYPE_METHOD) {
		Ref<Font> font = get_theme_font(SceneStringName(font), SNAME("Label"));
		int font_size = get_theme_font_size(SceneStringName(font_size), SNAME("Label"));
		Color color = get_theme_color(SceneStringName(font_color), SNAME("Label"));
		color.a = 0.5;

		Dictionary d = animation->track_get_key_value(track, p_index);
		String text;

		if (d.has("method")) {
			text += String(d["method"]);
		}
		text += "(";
		Vector<Variant> args;
		if (d.has("args")) {
			args = d["args"];
		}
		for (int i = 0; i < args.size(); i++) {
			if (i > 0) {
				text += ", ";
			}
			text += args[i].get_construct_string();
		}
		text += ")";

		int limit = MAX(0, p_clip_right - p_x - icon_to_draw->get_width());
		if (limit > 0) {
			draw_string(font, Vector2(p_x + icon_to_draw->get_width(), int(get_size().height - font->get_height(font_size)) / 2 + font->get_ascent(font_size)), text, HORIZONTAL_ALIGNMENT_LEFT, limit, font_size, color);
		}
	}

	// Use a different color for the currently hovered key.
	// The color multiplier is chosen to work with both dark and light editor themes,
	// and on both unselected and selected key icons.
	draw_texture(
			icon_to_draw,
			ofs,
			p_index == hovering_key_idx ? get_theme_color(SNAME("folder_icon_color"), SNAME("FileDialog")) : Color(1, 1, 1));
}

// Helper.
void AnimationTrackEdit::draw_rect_clipped(const Rect2 &p_rect, const Color &p_color, bool p_filled) {
	int clip_left = timeline->get_name_limit();
	int clip_right = get_size().width - timeline->get_buttons_width();

	if (p_rect.position.x > clip_right) {
		return;
	}
	if (p_rect.position.x + p_rect.size.x < clip_left) {
		return;
	}
	Rect2 clip = Rect2(clip_left, 0, clip_right - clip_left, get_size().height);
	draw_rect(clip.intersection(p_rect), p_color, p_filled);
}

void AnimationTrackEdit::draw_bg(int p_clip_left, int p_clip_right) {
}

void AnimationTrackEdit::draw_fg(int p_clip_left, int p_clip_right) {
}

void AnimationTrackEdit::draw_texture_region_clipped(const Ref<Texture2D> &p_texture, const Rect2 &p_rect, const Rect2 &p_region) {
	int clip_left = timeline->get_name_limit();
	int clip_right = get_size().width - timeline->get_buttons_width();

	// Clip left and right.
	if (clip_left > p_rect.position.x + p_rect.size.x) {
		return;
	}
	if (clip_right < p_rect.position.x) {
		return;
	}

	Rect2 rect = p_rect;
	Rect2 region = p_region;

	if (clip_left > rect.position.x) {
		int rect_pixels = (clip_left - rect.position.x);
		int region_pixels = rect_pixels * region.size.x / rect.size.x;

		rect.position.x += rect_pixels;
		rect.size.x -= rect_pixels;

		region.position.x += region_pixels;
		region.size.x -= region_pixels;
	}

	if (clip_right < rect.position.x + rect.size.x) {
		int rect_pixels = rect.position.x + rect.size.x - clip_right;
		int region_pixels = rect_pixels * region.size.x / rect.size.x;

		rect.size.x -= rect_pixels;
		region.size.x -= region_pixels;
	}

	draw_texture_rect_region(p_texture, rect, region);
}

int AnimationTrackEdit::get_track() const {
	return track;
}

Ref<Animation> AnimationTrackEdit::get_animation() const {
	return animation;
}

void AnimationTrackEdit::set_animation_and_track(const Ref<Animation> &p_animation, int p_track, bool p_read_only) {
	animation = p_animation;
	read_only = p_read_only;

	track = p_track;
	queue_redraw();

	ERR_FAIL_INDEX(track, animation->get_track_count());

	node_path = animation->track_get_path(p_track);
	type_icon = _get_key_type_icon();
	selected_icon = get_editor_theme_icon(SNAME("KeySelected"));
}

NodePath AnimationTrackEdit::get_path() const {
	return node_path;
}

Size2 AnimationTrackEdit::get_minimum_size() const {
	Ref<Texture2D> texture = get_editor_theme_icon(SNAME("Object"));
	Ref<Font> font = get_theme_font(SceneStringName(font), SNAME("Label"));
	int font_size = get_theme_font_size(SceneStringName(font_size), SNAME("Label"));
	int separation = get_theme_constant(SNAME("v_separation"), SNAME("ItemList"));

	int max_h = MAX(texture->get_height(), font->get_height(font_size));
	max_h = MAX(max_h, get_key_height());

	return Vector2(1, max_h + separation);
}

void AnimationTrackEdit::set_timeline(AnimationTimelineEdit *p_timeline) {
	timeline = p_timeline;
	timeline->set_track_edit(this);
	timeline->connect("zoom_changed", callable_mp(this, &AnimationTrackEdit::_zoom_changed));
	timeline->connect("name_limit_changed", callable_mp(this, &AnimationTrackEdit::_zoom_changed));
}

void AnimationTrackEdit::set_editor(AnimationTrackEditor *p_editor) {
	editor = p_editor;
}

void AnimationTrackEdit::_play_position_draw() {
	if (!animation.is_valid() || play_position_pos < 0) {
		return;
	}

	float scale = timeline->get_zoom_scale();
	int h = get_size().height;

	int px = (-timeline->get_value() + play_position_pos) * scale + timeline->get_name_limit();

	if (px >= timeline->get_name_limit() && px < (get_size().width - timeline->get_buttons_width())) {
		Color color = get_theme_color(SNAME("accent_color"), EditorStringName(Editor));
		play_position->draw_line(Point2(px, 0), Point2(px, h), color, Math::round(2 * EDSCALE));
	}
}

void AnimationTrackEdit::set_play_position(float p_pos) {
	play_position_pos = p_pos;
	play_position->queue_redraw();
}

void AnimationTrackEdit::update_play_position() {
	play_position->queue_redraw();
}

void AnimationTrackEdit::set_root(Node *p_root) {
	root = p_root;
}

void AnimationTrackEdit::_zoom_changed() {
	queue_redraw();
	play_position->queue_redraw();
}

void AnimationTrackEdit::_path_submitted(const String &p_text) {
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Change Track Path"));
	undo_redo->add_do_method(animation.ptr(), "track_set_path", track, p_text);
	undo_redo->add_undo_method(animation.ptr(), "track_set_path", track, animation->track_get_path(track));
	undo_redo->commit_action();
	path_popup->hide();
}

bool AnimationTrackEdit::_is_value_key_valid(const Variant &p_key_value, Variant::Type &r_valid_type) const {
	if (root == nullptr || !root->has_node_and_resource(animation->track_get_path(track))) {
		return false;
	}
	Ref<Resource> res;
	Vector<StringName> leftover_path;
	Node *node = root->get_node_and_resource(animation->track_get_path(track), res, leftover_path);

	Object *obj = nullptr;
	if (res.is_valid()) {
		obj = res.ptr();
	} else if (node) {
		obj = node;
	}

	bool prop_exists = false;
	if (obj) {
		r_valid_type = obj->get_static_property_type_indexed(leftover_path, &prop_exists);
	}

	return (!prop_exists || Variant::can_convert(p_key_value.get_type(), r_valid_type));
}

Ref<Texture2D> AnimationTrackEdit::_get_key_type_icon() const {
	const Ref<Texture2D> type_icons[9] = {
		get_editor_theme_icon(SNAME("KeyValue")),
		get_editor_theme_icon(SNAME("KeyTrackPosition")),
		get_editor_theme_icon(SNAME("KeyTrackRotation")),
		get_editor_theme_icon(SNAME("KeyTrackScale")),
		get_editor_theme_icon(SNAME("KeyTrackBlendShape")),
		get_editor_theme_icon(SNAME("KeyCall")),
		get_editor_theme_icon(SNAME("KeyBezier")),
		get_editor_theme_icon(SNAME("KeyAudio")),
		get_editor_theme_icon(SNAME("KeyAnimation"))
	};
	return type_icons[animation->track_get_type(track)];
}

String AnimationTrackEdit::get_tooltip(const Point2 &p_pos) const {
	if (check_rect.has_point(p_pos)) {
		return TTR("Toggle this track on/off.");
	}

	// Don't overlap track keys if they start at 0.
	if (path_rect.has_point(p_pos + Size2(type_icon->get_width(), 0))) {
		return animation->track_get_path(track);
	}

	if (update_mode_rect.has_point(p_pos)) {
		if (animation->track_get_type(track) == Animation::TYPE_AUDIO) {
			return TTR("Use Blend");
		} else {
			return TTR("Update Mode (How this property is set)");
		}
	}

	if (interp_mode_rect.has_point(p_pos)) {
		return TTR("Interpolation Mode");
	}

	if (loop_wrap_rect.has_point(p_pos)) {
		return TTR("Loop Wrap Mode (Interpolate end with beginning on loop)");
	}

	if (remove_rect.has_point(p_pos)) {
		return TTR("Remove this track.");
	}

	int limit = timeline->get_name_limit();
	int limit_end = get_size().width - timeline->get_buttons_width();
	// Left Border including space occupied by keyframes on t=0.
	int limit_start_hitbox = limit - type_icon->get_width();

	if (p_pos.x >= limit_start_hitbox && p_pos.x <= limit_end) {
		int key_idx = -1;
		float key_distance = 1e20;

		// Select should happen in the opposite order of drawing for more accurate overlap select.
		for (int i = animation->track_get_key_count(track) - 1; i >= 0; i--) {
			Rect2 rect = const_cast<AnimationTrackEdit *>(this)->get_key_rect(i, timeline->get_zoom_scale());
			float offset = animation->track_get_key_time(track, i) - timeline->get_value();
			offset = offset * timeline->get_zoom_scale() + limit;
			rect.position.x += offset;

			if (rect.has_point(p_pos)) {
				if (const_cast<AnimationTrackEdit *>(this)->is_key_selectable_by_distance()) {
					float distance = ABS(offset - p_pos.x);
					if (key_idx == -1 || distance < key_distance) {
						key_idx = i;
						key_distance = distance;
					}
				} else {
					// First one does it.
					break;
				}
			}
		}

		if (key_idx != -1) {
			String text = TTR("Time (s):") + " " + TS->format_number(rtos(Math::snapped(animation->track_get_key_time(track, key_idx), SECOND_DECIMAL))) + "\n";
			switch (animation->track_get_type(track)) {
				case Animation::TYPE_POSITION_3D: {
					Vector3 t = animation->track_get_key_value(track, key_idx);
					text += TTR("Position:") + " " + String(t) + "\n";
				} break;
				case Animation::TYPE_ROTATION_3D: {
					Quaternion t = animation->track_get_key_value(track, key_idx);
					text += TTR("Rotation:") + " " + String(t) + "\n";
				} break;
				case Animation::TYPE_SCALE_3D: {
					Vector3 t = animation->track_get_key_value(track, key_idx);
					text += TTR("Scale:") + " " + String(t) + "\n";
				} break;
				case Animation::TYPE_BLEND_SHAPE: {
					float t = animation->track_get_key_value(track, key_idx);
					text += TTR("Blend Shape:") + " " + itos(t) + "\n";
				} break;
				case Animation::TYPE_VALUE: {
					const Variant &v = animation->track_get_key_value(track, key_idx);
					text += TTR("Type:") + " " + Variant::get_type_name(v.get_type()) + "\n";
					Variant::Type valid_type = Variant::NIL;
					text += TTR("Value:") + " " + String(v);
					if (!_is_value_key_valid(v, valid_type)) {
						text += " " + vformat(TTR("(Invalid, expected type: %s)"), Variant::get_type_name(valid_type));
					}
					text += "\n" + TTR("Easing:") + " " + rtos(animation->track_get_key_transition(track, key_idx));

				} break;
				case Animation::TYPE_METHOD: {
					Dictionary d = animation->track_get_key_value(track, key_idx);
					if (d.has("method")) {
						text += String(d["method"]);
					}
					text += "(";
					Vector<Variant> args;
					if (d.has("args")) {
						args = d["args"];
					}
					for (int i = 0; i < args.size(); i++) {
						if (i > 0) {
							text += ", ";
						}
						text += args[i].get_construct_string();
					}
					text += ")\n";

				} break;
				case Animation::TYPE_BEZIER: {
					float h = animation->bezier_track_get_key_value(track, key_idx);
					text += TTR("Value:") + " " + rtos(h) + "\n";
					Vector2 ih = animation->bezier_track_get_key_in_handle(track, key_idx);
					text += TTR("In-Handle:") + " " + ih + "\n";
					Vector2 oh = animation->bezier_track_get_key_out_handle(track, key_idx);
					text += TTR("Out-Handle:") + " " + oh + "\n";
					int hm = animation->bezier_track_get_key_handle_mode(track, key_idx);
					switch (hm) {
						case Animation::HANDLE_MODE_FREE: {
							text += TTR("Handle mode: Free\n");
						} break;
						case Animation::HANDLE_MODE_LINEAR: {
							text += TTR("Handle mode: Linear\n");
						} break;
						case Animation::HANDLE_MODE_BALANCED: {
							text += TTR("Handle mode: Balanced\n");
						} break;
						case Animation::HANDLE_MODE_MIRRORED: {
							text += TTR("Handle mode: Mirrored\n");
						} break;
					}
				} break;
				case Animation::TYPE_AUDIO: {
					String stream_name = "null";
					Ref<Resource> stream = animation->audio_track_get_key_stream(track, key_idx);
					if (stream.is_valid()) {
						if (stream->get_path().is_resource_file()) {
							stream_name = stream->get_path().get_file();
						} else if (!stream->get_name().is_empty()) {
							stream_name = stream->get_name();
						} else {
							stream_name = stream->get_class();
						}
					}

					text += TTR("Stream:") + " " + stream_name + "\n";
					float so = animation->audio_track_get_key_start_offset(track, key_idx);
					text += TTR("Start (s):") + " " + rtos(so) + "\n";
					float eo = animation->audio_track_get_key_end_offset(track, key_idx);
					text += TTR("End (s):") + " " + rtos(eo) + "\n";
				} break;
				case Animation::TYPE_ANIMATION: {
					String name = animation->animation_track_get_key_animation(track, key_idx);
					text += TTR("Animation Clip:") + " " + name + "\n";
				} break;
			}
			return text;
		}
	}

	return Control::get_tooltip(p_pos);
}

void AnimationTrackEdit::gui_input(const Ref<InputEvent> &p_event) {
	ERR_FAIL_COND(p_event.is_null());

	if (p_event->is_pressed()) {
		if (ED_IS_SHORTCUT("animation_editor/duplicate_selected_keys", p_event)) {
			if (!read_only) {
				emit_signal(SNAME("duplicate_request"), -1.0, false);
			}
			accept_event();
		}
		if (ED_IS_SHORTCUT("animation_editor/cut_selected_keys", p_event)) {
			if (!read_only) {
				emit_signal(SNAME("cut_request"));
			}
			accept_event();
		}
		if (ED_IS_SHORTCUT("animation_editor/copy_selected_keys", p_event)) {
			if (!read_only) {
				emit_signal(SNAME("copy_request"));
			}
			accept_event();
		}

		if (ED_IS_SHORTCUT("animation_editor/paste_keys", p_event)) {
			if (!read_only) {
				emit_signal(SNAME("paste_request"), -1.0, false);
			}
			accept_event();
		}

		if (ED_IS_SHORTCUT("animation_editor/delete_selection", p_event)) {
			if (!read_only) {
				emit_signal(SNAME("delete_request"));
			}
			accept_event();
		}
	}

	Ref<InputEventMouseButton> mb = p_event;
	if (mb.is_valid() && mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT) {
		Point2 pos = mb->get_position();

		if (!read_only) {
			if (check_rect.has_point(pos)) {
				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
				undo_redo->create_action(TTR("Toggle Track Enabled"));
				undo_redo->add_do_method(animation.ptr(), "track_set_enabled", track, !animation->track_is_enabled(track));
				undo_redo->add_undo_method(animation.ptr(), "track_set_enabled", track, animation->track_is_enabled(track));
				undo_redo->commit_action();
				queue_redraw();
				accept_event();
			}

			// Don't overlap track keys if they start at 0.
			if (path_rect.has_point(pos + Size2(type_icon->get_width(), 0))) {
				clicking_on_name = true;
				accept_event();
			}

			if (update_mode_rect.has_point(pos)) {
				if (!menu) {
					menu = memnew(PopupMenu);
					add_child(menu);
					menu->connect(SceneStringName(id_pressed), callable_mp(this, &AnimationTrackEdit::_menu_selected));
				}
				menu->clear();
				if (animation->track_get_type(track) == Animation::TYPE_AUDIO) {
					menu->add_icon_item(get_editor_theme_icon(SNAME("UseBlendEnable")), TTR("Use Blend"), MENU_USE_BLEND_ENABLED);
					menu->add_icon_item(get_editor_theme_icon(SNAME("UseBlendDisable")), TTR("Don't Use Blend"), MENU_USE_BLEND_DISABLED);
				} else {
					menu->add_icon_item(get_editor_theme_icon(SNAME("TrackContinuous")), TTR("Continuous"), MENU_CALL_MODE_CONTINUOUS);
					menu->add_icon_item(get_editor_theme_icon(SNAME("TrackDiscrete")), TTR("Discrete"), MENU_CALL_MODE_DISCRETE);
					menu->add_icon_item(get_editor_theme_icon(SNAME("TrackCapture")), TTR("Capture"), MENU_CALL_MODE_CAPTURE);
				}
				menu->reset_size();

				moving_selection_attempt = false;
				moving_selection = false;

				Vector2 popup_pos = get_screen_position() + update_mode_rect.position + Vector2(0, update_mode_rect.size.height);
				menu->set_position(popup_pos);
				menu->popup();
				accept_event();
			}

			if (interp_mode_rect.has_point(pos)) {
				if (!menu) {
					menu = memnew(PopupMenu);
					add_child(menu);
					menu->connect(SceneStringName(id_pressed), callable_mp(this, &AnimationTrackEdit::_menu_selected));
				}
				menu->clear();
				menu->add_icon_item(get_editor_theme_icon(SNAME("InterpRaw")), TTR("Nearest"), MENU_INTERPOLATION_NEAREST);
				menu->add_icon_item(get_editor_theme_icon(SNAME("InterpLinear")), TTR("Linear"), MENU_INTERPOLATION_LINEAR);
				menu->add_icon_item(get_editor_theme_icon(SNAME("InterpCubic")), TTR("Cubic"), MENU_INTERPOLATION_CUBIC);
				// Check whether it is angle property.
				AnimationPlayerEditor *ape = AnimationPlayerEditor::get_singleton();
				if (ape) {
					AnimationPlayer *ap = ape->get_player();
					if (ap) {
						NodePath npath = animation->track_get_path(track);
						Node *a_ap_root_node = ap->get_node_or_null(ap->get_root_node());
						Node *nd = nullptr;
						// We must test that we have a valid a_ap_root_node before trying to access its content to init the nd Node.
						if (a_ap_root_node) {
							nd = a_ap_root_node->get_node_or_null(NodePath(npath.get_concatenated_names()));
						}
						if (nd) {
							StringName prop = npath.get_concatenated_subnames();
							PropertyInfo prop_info;
							ClassDB::get_property_info(nd->get_class(), prop, &prop_info);
#ifdef DISABLE_DEPRECATED
							bool is_angle = prop_info.type == Variant::FLOAT && prop_info.hint_string.contains("radians_as_degrees");
#else
							bool is_angle = prop_info.type == Variant::FLOAT && prop_info.hint_string.contains("radians");
#endif // DISABLE_DEPRECATED
							if (is_angle) {
								menu->add_icon_item(get_editor_theme_icon(SNAME("InterpLinearAngle")), TTR("Linear Angle"), MENU_INTERPOLATION_LINEAR_ANGLE);
								menu->add_icon_item(get_editor_theme_icon(SNAME("InterpCubicAngle")), TTR("Cubic Angle"), MENU_INTERPOLATION_CUBIC_ANGLE);
							}
						}
					}
				}
				menu->reset_size();

				moving_selection_attempt = false;
				moving_selection = false;

				Vector2 popup_pos = get_screen_position() + interp_mode_rect.position + Vector2(0, interp_mode_rect.size.height);
				menu->set_position(popup_pos);
				menu->popup();
				accept_event();
			}

			if (loop_wrap_rect.has_point(pos)) {
				if (!menu) {
					menu = memnew(PopupMenu);
					add_child(menu);
					menu->connect(SceneStringName(id_pressed), callable_mp(this, &AnimationTrackEdit::_menu_selected));
				}
				menu->clear();
				menu->add_icon_item(get_editor_theme_icon(SNAME("InterpWrapClamp")), TTR("Clamp Loop Interp"), MENU_LOOP_CLAMP);
				menu->add_icon_item(get_editor_theme_icon(SNAME("InterpWrapLoop")), TTR("Wrap Loop Interp"), MENU_LOOP_WRAP);
				menu->reset_size();

				moving_selection_attempt = false;
				moving_selection = false;

				Vector2 popup_pos = get_screen_position() + loop_wrap_rect.position + Vector2(0, loop_wrap_rect.size.height);
				menu->set_position(popup_pos);
				menu->popup();
				accept_event();
			}

			if (remove_rect.has_point(pos)) {
				emit_signal(SNAME("remove_request"), track);
				accept_event();
				return;
			}
		}

		if (_try_select_at_ui_pos(pos, mb->is_command_or_control_pressed() || mb->is_shift_pressed(), true)) {
			accept_event();
		}
	}

	if (mb.is_valid() && mb->is_pressed() && mb->get_button_index() == MouseButton::RIGHT) {
		Point2 pos = mb->get_position();
		if (pos.x >= timeline->get_name_limit() && pos.x <= get_size().width - timeline->get_buttons_width()) {
			// Can do something with menu too! show insert key.
			float offset = (pos.x - timeline->get_name_limit()) / timeline->get_zoom_scale();
			if (!read_only) {
				if (!menu) {
					menu = memnew(PopupMenu);
					add_child(menu);
					menu->connect(SceneStringName(id_pressed), callable_mp(this, &AnimationTrackEdit::_menu_selected));
				}

				bool selected = _try_select_at_ui_pos(pos, mb->is_command_or_control_pressed() || mb->is_shift_pressed(), false);

				menu->clear();
				menu->add_icon_item(get_editor_theme_icon(SNAME("Key")), TTR("Insert Key..."), MENU_KEY_INSERT);
				if (selected || editor->is_selection_active()) {
					menu->add_separator();
					menu->add_icon_item(get_editor_theme_icon(SNAME("Duplicate")), TTR("Duplicate Key(s)"), MENU_KEY_DUPLICATE);
					menu->add_icon_item(get_editor_theme_icon(SNAME("ActionCut")), TTR("Cut Key(s)"), MENU_KEY_CUT);
					menu->add_icon_item(get_editor_theme_icon(SNAME("ActionCopy")), TTR("Copy Key(s)"), MENU_KEY_COPY);
				}
				if (editor->is_key_clipboard_active()) {
					menu->add_icon_item(get_editor_theme_icon(SNAME("ActionPaste")), TTR("Paste Key(s)"), MENU_KEY_PASTE);
				}
				if (selected || editor->is_selection_active()) {
					AnimationPlayer *player = AnimationPlayerEditor::get_singleton()->get_player();
					if ((!player->has_animation(SceneStringName(RESET)) || animation != player->get_animation(SceneStringName(RESET))) && editor->can_add_reset_key()) {
						menu->add_icon_item(get_editor_theme_icon(SNAME("Reload")), TTR("Add RESET Value(s)"), MENU_KEY_ADD_RESET);
					}

					menu->add_separator();
					menu->add_icon_item(get_editor_theme_icon(SNAME("Remove")), TTR("Delete Key(s)"), MENU_KEY_DELETE);
				}
				menu->reset_size();

				moving_selection_attempt = false;
				moving_selection = false;

				menu->set_position(get_screen_position() + get_local_mouse_position());
				menu->popup();

				insert_at_pos = offset + timeline->get_value();
				accept_event();
			}
		}
	}

	if (mb.is_valid() && !mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT && clicking_on_name) {
		if (!path) {
			path_popup = memnew(Popup);
			path_popup->set_wrap_controls(true);
			add_child(path_popup);
			path = memnew(LineEdit);
			path_popup->add_child(path);
			path->set_anchors_and_offsets_preset(PRESET_FULL_RECT);
			path->connect("text_submitted", callable_mp(this, &AnimationTrackEdit::_path_submitted));
		}

		path->set_text(animation->track_get_path(track));
		Vector2 theme_ofs = path->get_theme_stylebox(CoreStringName(normal), SNAME("LineEdit"))->get_offset();

		moving_selection_attempt = false;
		moving_selection = false;

		path_popup->set_position(get_screen_position() + path_rect.position - theme_ofs);
		path_popup->set_size(path_rect.size);
		path_popup->popup();
		path->grab_focus();
		path->set_caret_column(path->get_text().length());
		clicking_on_name = false;
	}

	if (mb.is_valid() && moving_selection_attempt) {
		if (!mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT) {
			moving_selection_attempt = false;
			if (moving_selection && moving_selection_effective) {
				if (abs(editor->get_moving_selection_offset()) > CMP_EPSILON) {
					emit_signal(SNAME("move_selection_commit"));
				}
			} else if (select_single_attempt != -1) {
				emit_signal(SNAME("select_key"), select_single_attempt, true);
			}
			moving_selection = false;
			select_single_attempt = -1;
		}

		if (moving_selection && mb->is_pressed() && mb->get_button_index() == MouseButton::RIGHT) {
			moving_selection_attempt = false;
			moving_selection = false;
			emit_signal(SNAME("move_selection_cancel"));
		}
	}

	Ref<InputEventMouseMotion> mm = p_event;
	if (mm.is_valid()) {
		const int previous_hovering_key_idx = hovering_key_idx;

		// Hovering compressed keyframes for editing is not possible.
		if (!animation->track_is_compressed(track)) {
			const float scale = timeline->get_zoom_scale();
			const int limit = timeline->get_name_limit();
			const int limit_end = get_size().width - timeline->get_buttons_width();
			// Left Border including space occupied by keyframes on t=0.
			const int limit_start_hitbox = limit - type_icon->get_width();
			const Point2 pos = mm->get_position();

			if (pos.x >= limit_start_hitbox && pos.x <= limit_end) {
				// Use the same logic as key selection to ensure that hovering accurately represents
				// which key will be selected when clicking.
				int key_idx = -1;
				float key_distance = 1e20;

				hovering_key_idx = -1;

				// Hovering should happen in the opposite order of drawing for more accurate overlap hovering.
				for (int i = animation->track_get_key_count(track) - 1; i >= 0; i--) {
					Rect2 rect = get_key_rect(i, scale);
					float offset = animation->track_get_key_time(track, i) - timeline->get_value();
					offset = offset * scale + limit;
					rect.position.x += offset;

					if (rect.has_point(pos)) {
						if (is_key_selectable_by_distance()) {
							const float distance = ABS(offset - pos.x);
							if (key_idx == -1 || distance < key_distance) {
								key_idx = i;
								key_distance = distance;
								hovering_key_idx = i;
							}
						} else {
							// First one does it.
							hovering_key_idx = i;
							break;
						}
					}
				}

				if (hovering_key_idx != previous_hovering_key_idx) {
					// Required to draw keyframe hover feedback on the correct keyframe.
					queue_redraw();
				}
			}
		}
	}

	if (mm.is_valid() && mm->get_button_mask().has_flag(MouseButtonMask::LEFT) && moving_selection_attempt) {
		if (!moving_selection) {
			moving_selection = true;
			emit_signal(SNAME("move_selection_begin"));
		}

		float moving_begin_time = ((moving_selection_mouse_begin_x - timeline->get_name_limit()) / timeline->get_zoom_scale()) + timeline->get_value();
		float new_time = ((mm->get_position().x - timeline->get_name_limit()) / timeline->get_zoom_scale()) + timeline->get_value();
		float delta = new_time - moving_begin_time;
		float snapped_time = editor->snap_time(moving_selection_pivot + delta);

		float offset = 0.0;
		if (abs(editor->get_moving_selection_offset()) > CMP_EPSILON || (snapped_time > moving_selection_pivot && delta > CMP_EPSILON) || (snapped_time < moving_selection_pivot && delta < -CMP_EPSILON)) {
			offset = snapped_time - moving_selection_pivot;
			moving_selection_effective = true;
		}

		emit_signal(SNAME("move_selection"), offset);
	}
}

bool AnimationTrackEdit::_try_select_at_ui_pos(const Point2 &p_pos, bool p_aggregate, bool p_deselectable) {
	if (!animation->track_is_compressed(track)) { // Selecting compressed keyframes for editing is not possible.
		float scale = timeline->get_zoom_scale();
		int limit = timeline->get_name_limit();
		int limit_end = get_size().width - timeline->get_buttons_width();
		// Left Border including space occupied by keyframes on t=0.
		int limit_start_hitbox = limit - type_icon->get_width();

		if (p_pos.x >= limit_start_hitbox && p_pos.x <= limit_end) {
			int key_idx = -1;
			float key_distance = 1e20;

			// Select should happen in the opposite order of drawing for more accurate overlap select.
			for (int i = animation->track_get_key_count(track) - 1; i >= 0; i--) {
				Rect2 rect = get_key_rect(i, scale);
				float offset = animation->track_get_key_time(track, i) - timeline->get_value();
				offset = offset * scale + limit;
				rect.position.x += offset;

				if (rect.has_point(p_pos)) {
					if (is_key_selectable_by_distance()) {
						float distance = ABS(offset - p_pos.x);
						if (key_idx == -1 || distance < key_distance) {
							key_idx = i;
							key_distance = distance;
						}
					} else {
						// First one does it.
						key_idx = i;
						break;
					}
				}
			}

			if (key_idx != -1) {
				if (p_aggregate) {
					if (editor->is_key_selected(track, key_idx)) {
						if (p_deselectable) {
							emit_signal(SNAME("deselect_key"), key_idx);
							moving_selection_pivot = 0.0f;
							moving_selection_mouse_begin_x = 0.0f;
						}
					} else {
						emit_signal(SNAME("select_key"), key_idx, false);
						moving_selection_attempt = true;
						moving_selection_effective = false;
						select_single_attempt = -1;
						moving_selection_pivot = animation->track_get_key_time(track, key_idx);
						moving_selection_mouse_begin_x = p_pos.x;
					}
				} else {
					if (!editor->is_key_selected(track, key_idx)) {
						emit_signal(SNAME("select_key"), key_idx, true);
						select_single_attempt = -1;
					} else {
						select_single_attempt = key_idx;
					}

					moving_selection_attempt = true;
					moving_selection_effective = false;
					moving_selection_pivot = animation->track_get_key_time(track, key_idx);
					moving_selection_mouse_begin_x = p_pos.x;
				}

				if (read_only) {
					moving_selection_attempt = false;
					moving_selection_pivot = 0.0f;
					moving_selection_mouse_begin_x = 0.0f;
				}
				return true;
			}
		}
	}
	return false;
}

Variant AnimationTrackEdit::get_drag_data(const Point2 &p_point) {
	if (!clicking_on_name) {
		return Variant();
	}

	Dictionary drag_data;
	drag_data["type"] = "animation_track";
	String base_path = animation->track_get_path(track);
	base_path = base_path.get_slice(":", 0); // Remove sub-path.
	drag_data["group"] = base_path;
	drag_data["index"] = track;

	Button *tb = memnew(Button);
	tb->set_flat(true);
	tb->set_text(path_cache);
	tb->set_icon(icon_cache);
	tb->add_theme_constant_override("icon_max_width", get_theme_constant("class_icon_size", EditorStringName(Editor)));
	set_drag_preview(tb);

	clicking_on_name = false;

	return drag_data;
}

bool AnimationTrackEdit::can_drop_data(const Point2 &p_point, const Variant &p_data) const {
	Dictionary d = p_data;
	if (!d.has("type")) {
		return false;
	}

	String type = d["type"];
	if (type != "animation_track") {
		return false;
	}

	// Don't allow moving tracks outside their groups.
	if (get_editor()->is_grouping_tracks()) {
		String base_path = animation->track_get_path(track);
		base_path = base_path.get_slice(":", 0); // Remove sub-path.
		if (d["group"] != base_path) {
			return false;
		}
	}

	if (p_point.y < get_size().height / 2) {
		dropping_at = -1;
	} else {
		dropping_at = 1;
	}

	const_cast<AnimationTrackEdit *>(this)->queue_redraw();

	return true;
}

void AnimationTrackEdit::drop_data(const Point2 &p_point, const Variant &p_data) {
	Dictionary d = p_data;
	if (!d.has("type")) {
		return;
	}

	String type = d["type"];
	if (type != "animation_track") {
		return;
	}

	// Don't allow moving tracks outside their groups.
	if (get_editor()->is_grouping_tracks()) {
		String base_path = animation->track_get_path(track);
		base_path = base_path.get_slice(":", 0); // Remove sub-path.
		if (d["group"] != base_path) {
			return;
		}
	}

	int from_track = d["index"];

	if (dropping_at < 0) {
		emit_signal(SNAME("dropped"), from_track, track);
	} else {
		emit_signal(SNAME("dropped"), from_track, track + 1);
	}
}

void AnimationTrackEdit::_menu_selected(int p_index) {
	switch (p_index) {
		case MENU_CALL_MODE_CONTINUOUS:
		case MENU_CALL_MODE_DISCRETE:
		case MENU_CALL_MODE_CAPTURE: {
			Animation::UpdateMode update_mode = Animation::UpdateMode(p_index);
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Change Animation Update Mode"));
			undo_redo->add_do_method(animation.ptr(), "value_track_set_update_mode", track, update_mode);
			undo_redo->add_undo_method(animation.ptr(), "value_track_set_update_mode", track, animation->value_track_get_update_mode(track));
			undo_redo->commit_action();
			queue_redraw();

		} break;
		case MENU_INTERPOLATION_NEAREST:
		case MENU_INTERPOLATION_LINEAR:
		case MENU_INTERPOLATION_CUBIC:
		case MENU_INTERPOLATION_LINEAR_ANGLE:
		case MENU_INTERPOLATION_CUBIC_ANGLE: {
			Animation::InterpolationType interp_mode = Animation::InterpolationType(p_index - MENU_INTERPOLATION_NEAREST);
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Change Animation Interpolation Mode"));
			undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_type", track, interp_mode);
			undo_redo->add_undo_method(animation.ptr(), "track_set_interpolation_type", track, animation->track_get_interpolation_type(track));
			undo_redo->commit_action();
			queue_redraw();
		} break;
		case MENU_LOOP_WRAP:
		case MENU_LOOP_CLAMP: {
			bool loop_wrap = p_index == MENU_LOOP_WRAP;
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Change Animation Loop Mode"));
			undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_loop_wrap", track, loop_wrap);
			undo_redo->add_undo_method(animation.ptr(), "track_set_interpolation_loop_wrap", track, animation->track_get_interpolation_loop_wrap(track));
			undo_redo->commit_action();
			queue_redraw();

		} break;
		case MENU_KEY_INSERT: {
			emit_signal(SNAME("insert_key"), insert_at_pos);
		} break;
		case MENU_KEY_DUPLICATE: {
			emit_signal(SNAME("duplicate_request"), insert_at_pos, true);
		} break;
		case MENU_KEY_CUT: {
			emit_signal(SNAME("cut_request"));
		} break;
		case MENU_KEY_COPY: {
			emit_signal(SNAME("copy_request"));
		} break;
		case MENU_KEY_PASTE: {
			emit_signal(SNAME("paste_request"), insert_at_pos, true);
		} break;
		case MENU_KEY_ADD_RESET: {
			emit_signal(SNAME("create_reset_request"));

		} break;
		case MENU_KEY_DELETE: {
			emit_signal(SNAME("delete_request"));

		} break;
		case MENU_USE_BLEND_ENABLED:
		case MENU_USE_BLEND_DISABLED: {
			bool use_blend = p_index == MENU_USE_BLEND_ENABLED;
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Change Animation Use Blend"));
			undo_redo->add_do_method(animation.ptr(), "audio_track_set_use_blend", track, use_blend);
			undo_redo->add_undo_method(animation.ptr(), "audio_track_set_use_blend", track, animation->audio_track_is_use_blend(track));
			undo_redo->commit_action();
			queue_redraw();
		} break;
	}
}

void AnimationTrackEdit::cancel_drop() {
	if (dropping_at != 0) {
		dropping_at = 0;
		queue_redraw();
	}
}

void AnimationTrackEdit::set_in_group(bool p_enable) {
	in_group = p_enable;
	queue_redraw();
}

void AnimationTrackEdit::append_to_selection(const Rect2 &p_box, bool p_deselection) {
	if (animation->track_is_compressed(track)) {
		return; // Compressed keyframes can't be edited
	}
	// Left Border including space occupied by keyframes on t=0.
	int limit_start_hitbox = timeline->get_name_limit() - type_icon->get_width();
	Rect2 select_rect(limit_start_hitbox, 0, get_size().width - timeline->get_name_limit() - timeline->get_buttons_width(), get_size().height);
	select_rect = select_rect.intersection(p_box);

	// Select should happen in the opposite order of drawing for more accurate overlap select.
	for (int i = animation->track_get_key_count(track) - 1; i >= 0; i--) {
		Rect2 rect = const_cast<AnimationTrackEdit *>(this)->get_key_rect(i, timeline->get_zoom_scale());
		float offset = animation->track_get_key_time(track, i) - timeline->get_value();
		offset = offset * timeline->get_zoom_scale() + timeline->get_name_limit();
		rect.position.x += offset;

		if (select_rect.intersects(rect)) {
			if (p_deselection) {
				emit_signal(SNAME("deselect_key"), i);
			} else {
				emit_signal(SNAME("select_key"), i, false);
			}
		}
	}
}

void AnimationTrackEdit::_bind_methods() {
	ADD_SIGNAL(MethodInfo("timeline_changed", PropertyInfo(Variant::FLOAT, "position"), PropertyInfo(Variant::BOOL, "timeline_only")));
	ADD_SIGNAL(MethodInfo("remove_request", PropertyInfo(Variant::INT, "track")));
	ADD_SIGNAL(MethodInfo("dropped", PropertyInfo(Variant::INT, "from_track"), PropertyInfo(Variant::INT, "to_track")));
	ADD_SIGNAL(MethodInfo("insert_key", PropertyInfo(Variant::FLOAT, "offset")));
	ADD_SIGNAL(MethodInfo("select_key", PropertyInfo(Variant::INT, "index"), PropertyInfo(Variant::BOOL, "single")));
	ADD_SIGNAL(MethodInfo("deselect_key", PropertyInfo(Variant::INT, "index")));

	ADD_SIGNAL(MethodInfo("move_selection_begin"));
	ADD_SIGNAL(MethodInfo("move_selection", PropertyInfo(Variant::FLOAT, "offset")));
	ADD_SIGNAL(MethodInfo("move_selection_commit"));
	ADD_SIGNAL(MethodInfo("move_selection_cancel"));

	ADD_SIGNAL(MethodInfo("duplicate_request", PropertyInfo(Variant::FLOAT, "offset"), PropertyInfo(Variant::BOOL, "is_offset_valid")));
	ADD_SIGNAL(MethodInfo("create_reset_request"));
	ADD_SIGNAL(MethodInfo("copy_request"));
	ADD_SIGNAL(MethodInfo("cut_request"));
	ADD_SIGNAL(MethodInfo("paste_request", PropertyInfo(Variant::FLOAT, "offset"), PropertyInfo(Variant::BOOL, "is_offset_valid")));
	ADD_SIGNAL(MethodInfo("delete_request"));
}

AnimationTrackEdit::AnimationTrackEdit() {
	play_position = memnew(Control);
	play_position->set_mouse_filter(MOUSE_FILTER_PASS);
	add_child(play_position);
	play_position->set_anchors_and_offsets_preset(PRESET_FULL_RECT);
	play_position->connect(SceneStringName(draw), callable_mp(this, &AnimationTrackEdit::_play_position_draw));
	set_focus_mode(FOCUS_CLICK);
	set_mouse_filter(MOUSE_FILTER_PASS); // Scroll has to work too for selection.
}

//////////////////////////////////////

AnimationTrackEdit *AnimationTrackEditPlugin::create_value_track_edit(Object *p_object, Variant::Type p_type, const String &p_property, PropertyHint p_hint, const String &p_hint_string, int p_usage) {
	if (get_script_instance()) {
		return Object::cast_to<AnimationTrackEdit>(get_script_instance()->call("create_value_track_edit", p_object, p_type, p_property, p_hint, p_hint_string, p_usage));
	}
	return nullptr;
}

AnimationTrackEdit *AnimationTrackEditPlugin::create_audio_track_edit() {
	if (get_script_instance()) {
		return Object::cast_to<AnimationTrackEdit>(get_script_instance()->call("create_audio_track_edit").operator Object *());
	}
	return nullptr;
}

AnimationTrackEdit *AnimationTrackEditPlugin::create_animation_track_edit(Object *p_object) {
	if (get_script_instance()) {
		return Object::cast_to<AnimationTrackEdit>(get_script_instance()->call("create_animation_track_edit", p_object).operator Object *());
	}
	return nullptr;
}

///////////////////////////////////////

void AnimationTrackEditGroup::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_THEME_CHANGED: {
			icon_size = Vector2(1, 1) * get_theme_constant(SNAME("class_icon_size"), EditorStringName(Editor));
		} break;

		case NOTIFICATION_DRAW: {
			Ref<Font> font = get_theme_font(SceneStringName(font), SNAME("Label"));
			int font_size = get_theme_font_size(SceneStringName(font_size), SNAME("Label"));
			int separation = get_theme_constant(SNAME("h_separation"), SNAME("ItemList"));
			Color color = get_theme_color(SceneStringName(font_color), SNAME("Label"));

			if (root) {
				Node *n = root->get_node_or_null(node);
				if (n && EditorNode::get_singleton()->get_editor_selection()->is_selected(n)) {
					color = get_theme_color(SNAME("accent_color"), EditorStringName(Editor));
				}
			}

			Color bgcol = get_theme_color(SNAME("dark_color_2"), EditorStringName(Editor));
			bgcol.a *= 0.6;
			draw_rect(Rect2(Point2(), get_size()), bgcol);
			Color linecolor = color;
			linecolor.a = 0.2;

			draw_line(Point2(), Point2(get_size().width, 0), linecolor, Math::round(EDSCALE));
			draw_line(Point2(timeline->get_name_limit(), 0), Point2(timeline->get_name_limit(), get_size().height), linecolor, Math::round(EDSCALE));
			draw_line(Point2(get_size().width - timeline->get_buttons_width(), 0), Point2(get_size().width - timeline->get_buttons_width(), get_size().height), linecolor, Math::round(EDSCALE));

			int ofs = 0;
			draw_texture_rect(icon, Rect2(Point2(ofs, int(get_size().height - icon_size.y) / 2), icon_size));
			ofs += separation + icon_size.x;
			draw_string(font, Point2(ofs, int(get_size().height - font->get_height(font_size)) / 2 + font->get_ascent(font_size)), node_name, HORIZONTAL_ALIGNMENT_LEFT, timeline->get_name_limit() - ofs, font_size, color);

			int px = (-timeline->get_value() + timeline->get_play_position()) * timeline->get_zoom_scale() + timeline->get_name_limit();

			if (px >= timeline->get_name_limit() && px < (get_size().width - timeline->get_buttons_width())) {
				Color accent = get_theme_color(SNAME("accent_color"), EditorStringName(Editor));
				draw_line(Point2(px, 0), Point2(px, get_size().height), accent, Math::round(2 * EDSCALE));
			}
		} break;
	}
}

void AnimationTrackEditGroup::gui_input(const Ref<InputEvent> &p_event) {
	ERR_FAIL_COND(p_event.is_null());

	Ref<InputEventMouseButton> mb = p_event;
	if (mb.is_valid() && mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT) {
		Point2 pos = mb->get_position();
		Rect2 node_name_rect = Rect2(0, 0, timeline->get_name_limit(), get_size().height);

		if (node_name_rect.has_point(pos)) {
			EditorSelection *editor_selection = EditorNode::get_singleton()->get_editor_selection();
			editor_selection->clear();
			Node *n = root->get_node_or_null(node);
			if (n) {
				editor_selection->add_node(n);
			}
		}
	}
}

void AnimationTrackEditGroup::set_type_and_name(const Ref<Texture2D> &p_type, const String &p_name, const NodePath &p_node) {
	icon = p_type;
	node_name = p_name;
	node = p_node;
	queue_redraw();
	update_minimum_size();
}

Size2 AnimationTrackEditGroup::get_minimum_size() const {
	Ref<Font> font = get_theme_font(SceneStringName(font), SNAME("Label"));
	int font_size = get_theme_font_size(SceneStringName(font_size), SNAME("Label"));
	int separation = get_theme_constant(SNAME("v_separation"), SNAME("ItemList"));

	return Vector2(0, MAX(font->get_height(font_size), icon_size.y) + separation);
}

void AnimationTrackEditGroup::set_timeline(AnimationTimelineEdit *p_timeline) {
	timeline = p_timeline;
	timeline->connect("zoom_changed", callable_mp(this, &AnimationTrackEditGroup::_zoom_changed));
	timeline->connect("name_limit_changed", callable_mp(this, &AnimationTrackEditGroup::_zoom_changed));
}

void AnimationTrackEditGroup::set_root(Node *p_root) {
	root = p_root;
	queue_redraw();
}

void AnimationTrackEditGroup::_zoom_changed() {
	queue_redraw();
}

AnimationTrackEditGroup::AnimationTrackEditGroup() {
	set_mouse_filter(MOUSE_FILTER_PASS);
}

//////////////////////////////////////

void AnimationTrackEditor::add_track_edit_plugin(const Ref<AnimationTrackEditPlugin> &p_plugin) {
	if (track_edit_plugins.has(p_plugin)) {
		return;
	}
	track_edit_plugins.push_back(p_plugin);
}

void AnimationTrackEditor::remove_track_edit_plugin(const Ref<AnimationTrackEditPlugin> &p_plugin) {
	track_edit_plugins.erase(p_plugin);
}

void AnimationTrackEditor::set_animation(const Ref<Animation> &p_anim, bool p_read_only) {
	if (animation != p_anim && _get_track_selected() >= 0) {
		track_edits[_get_track_selected()]->release_focus();
	}
	if (animation.is_valid()) {
		animation->disconnect_changed(callable_mp(this, &AnimationTrackEditor::_animation_changed));
		_clear_selection();
	}
	animation = p_anim;
	read_only = p_read_only;
	timeline->set_animation(p_anim, read_only);

	_cancel_bezier_edit();
	_update_tracks();

	if (animation.is_valid()) {
		animation->connect_changed(callable_mp(this, &AnimationTrackEditor::_animation_changed));

		hscroll->show();
		edit->set_disabled(read_only);
		step->set_block_signals(true);

		_update_step_spinbox();
		step->set_block_signals(false);
		step->set_read_only(false);
		snap->set_disabled(false);
		snap_mode->set_disabled(false);
		auto_fit->set_disabled(false);
		auto_fit_bezier->set_disabled(false);

		imported_anim_warning->hide();
		for (int i = 0; i < animation->get_track_count(); i++) {
			if (animation->track_is_imported(i)) {
				imported_anim_warning->show();
				break;
			}
		}

		_check_bezier_exist();
	} else {
		hscroll->hide();
		edit->set_disabled(true);
		step->set_block_signals(true);
		step->set_value(0);
		step->set_block_signals(false);
		step->set_read_only(true);
		snap->set_disabled(true);
		snap_mode->set_disabled(true);
		bezier_edit_icon->set_disabled(true);
		auto_fit->set_disabled(true);
		auto_fit_bezier->set_disabled(true);
	}
}

void AnimationTrackEditor::_check_bezier_exist() {
	bool is_exist = false;
	for (int i = 0; i < animation->get_track_count(); i++) {
		if (animation->track_get_type(i) == Animation::TrackType::TYPE_BEZIER) {
			is_exist = true;
			break;
		}
	}
	if (is_exist) {
		bezier_edit_icon->set_disabled(false);
	} else {
		if (bezier_edit->is_visible()) {
			_cancel_bezier_edit();
		}
		bezier_edit_icon->set_disabled(true);
	}
}

Ref<Animation> AnimationTrackEditor::get_current_animation() const {
	return animation;
}

void AnimationTrackEditor::_root_removed() {
	root = nullptr;
}

void AnimationTrackEditor::set_root(Node *p_root) {
	if (root) {
		root->disconnect(SceneStringName(tree_exiting), callable_mp(this, &AnimationTrackEditor::_root_removed));
	}

	root = p_root;

	if (root) {
		root->connect(SceneStringName(tree_exiting), callable_mp(this, &AnimationTrackEditor::_root_removed), CONNECT_ONE_SHOT);
	}

	_update_tracks();
}

Node *AnimationTrackEditor::get_root() const {
	return root;
}

void AnimationTrackEditor::update_keying() {
	bool keying_enabled = false;

	EditorSelectionHistory *editor_history = EditorNode::get_singleton()->get_editor_selection_history();
	if (is_visible_in_tree() && animation.is_valid() && editor_history->get_path_size() > 0) {
		Object *obj = ObjectDB::get_instance(editor_history->get_path_object(0));
		keying_enabled = Object::cast_to<Node>(obj) != nullptr;
	}

	if (keying_enabled == keying) {
		return;
	}

	keying = keying_enabled;

	emit_signal(SNAME("keying_changed"));
}

bool AnimationTrackEditor::has_keying() const {
	return keying;
}

Dictionary AnimationTrackEditor::get_state() const {
	Dictionary state;
	state["fps_mode"] = timeline->is_using_fps();
	state["zoom"] = zoom->get_value();
	state["offset"] = timeline->get_value();
	state["v_scroll"] = scroll->get_v_scroll_bar()->get_value();
	return state;
}

void AnimationTrackEditor::set_state(const Dictionary &p_state) {
	if (p_state.has("fps_mode")) {
		bool fps_mode = p_state["fps_mode"];
		if (fps_mode) {
			snap_mode->select(1);
		} else {
			snap_mode->select(0);
		}
		_snap_mode_changed(snap_mode->get_selected());
	} else {
		snap_mode->select(0);
		_snap_mode_changed(snap_mode->get_selected());
	}
	if (p_state.has("zoom")) {
		zoom->set_value(p_state["zoom"]);
	} else {
		zoom->set_value(1.0);
	}
	if (p_state.has("offset")) {
		timeline->set_value(p_state["offset"]);
	} else {
		timeline->set_value(0);
	}
	if (p_state.has("v_scroll")) {
		scroll->get_v_scroll_bar()->set_value(p_state["v_scroll"]);
	} else {
		scroll->get_v_scroll_bar()->set_value(0);
	}
}

void AnimationTrackEditor::cleanup() {
	set_animation(Ref<Animation>(), read_only);
}

void AnimationTrackEditor::_name_limit_changed() {
	_redraw_tracks();
}

void AnimationTrackEditor::_timeline_changed(float p_new_pos, bool p_timeline_only) {
	emit_signal(SNAME("timeline_changed"), p_new_pos, p_timeline_only);
}

void AnimationTrackEditor::_track_remove_request(int p_track) {
	_animation_track_remove_request(p_track, animation);
}

void AnimationTrackEditor::_animation_track_remove_request(int p_track, Ref<Animation> p_from_animation) {
	if (p_from_animation->track_is_compressed(p_track)) {
		EditorNode::get_singleton()->show_warning(TTR("Compressed tracks can't be edited or removed. Re-import the animation with compression disabled in order to edit."));
		return;
	}
	int idx = p_track;
	if (idx >= 0 && idx < p_from_animation->get_track_count()) {
		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
		undo_redo->create_action(TTR("Remove Anim Track"), UndoRedo::MERGE_DISABLE, p_from_animation.ptr());

		// Remove corresponding reset tracks if they are no longer needed.
		AnimationPlayer *player = AnimationPlayerEditor::get_singleton()->get_player();
		if (player->has_animation(SceneStringName(RESET))) {
			Ref<Animation> reset = player->get_animation(SceneStringName(RESET));
			if (reset != p_from_animation) {
				for (int i = 0; i < reset->get_track_count(); i++) {
					if (reset->track_get_path(i) == p_from_animation->track_get_path(p_track)) {
						// Check if the reset track isn't used by other animations.
						bool used = false;
						List<StringName> animation_list;
						player->get_animation_list(&animation_list);

						for (const StringName &anim_name : animation_list) {
							Ref<Animation> anim = player->get_animation(anim_name);
							if (anim == p_from_animation || anim == reset) {
								continue;
							}

							for (int j = 0; j < anim->get_track_count(); j++) {
								if (anim->track_get_path(j) == reset->track_get_path(i)) {
									used = true;
									break;
								}
							}

							if (used) {
								break;
							}
						}

						if (!used) {
							_animation_track_remove_request(i, reset);
						}
						break;
					}
				}
			}
		}

		undo_redo->add_do_method(this, "_clear_selection", false);
		undo_redo->add_do_method(p_from_animation.ptr(), "remove_track", idx);
		undo_redo->add_undo_method(p_from_animation.ptr(), "add_track", p_from_animation->track_get_type(idx), idx);
		undo_redo->add_undo_method(p_from_animation.ptr(), "track_set_path", idx, p_from_animation->track_get_path(idx));

		// TODO interpolation.
		for (int i = 0; i < p_from_animation->track_get_key_count(idx); i++) {
			Variant v = p_from_animation->track_get_key_value(idx, i);
			float time = p_from_animation->track_get_key_time(idx, i);
			float trans = p_from_animation->track_get_key_transition(idx, i);

			undo_redo->add_undo_method(p_from_animation.ptr(), "track_insert_key", idx, time, v);
			undo_redo->add_undo_method(p_from_animation.ptr(), "track_set_key_transition", idx, i, trans);
		}

		undo_redo->add_undo_method(p_from_animation.ptr(), "track_set_interpolation_type", idx, p_from_animation->track_get_interpolation_type(idx));
		if (p_from_animation->track_get_type(idx) == Animation::TYPE_VALUE) {
			undo_redo->add_undo_method(p_from_animation.ptr(), "value_track_set_update_mode", idx, p_from_animation->value_track_get_update_mode(idx));
		}
		if (animation->track_get_type(idx) == Animation::TYPE_AUDIO) {
			undo_redo->add_undo_method(animation.ptr(), "audio_track_set_use_blend", idx, animation->audio_track_is_use_blend(idx));
		}

		undo_redo->commit_action();
	}
}

void AnimationTrackEditor::_track_grab_focus(int p_track) {
	// Don't steal focus if not working with the track editor.
	if (Object::cast_to<AnimationTrackEdit>(get_viewport()->gui_get_focus_owner())) {
		track_edits[p_track]->grab_focus();
	}
}

void AnimationTrackEditor::set_anim_pos(float p_pos) {
	timeline->set_play_position(p_pos);
	for (int i = 0; i < track_edits.size(); i++) {
		track_edits[i]->set_play_position(p_pos);
	}
	_redraw_groups();
	bezier_edit->set_play_position(p_pos);
}

static bool track_type_is_resettable(Animation::TrackType p_type) {
	switch (p_type) {
		case Animation::TYPE_VALUE:
			[[fallthrough]];
		case Animation::TYPE_BLEND_SHAPE:
			[[fallthrough]];
		case Animation::TYPE_BEZIER:
			[[fallthrough]];
		case Animation::TYPE_POSITION_3D:
			[[fallthrough]];
		case Animation::TYPE_ROTATION_3D:
			[[fallthrough]];
		case Animation::TYPE_SCALE_3D:
			return true;
		default:
			return false;
	}
}

void AnimationTrackEditor::make_insert_queue() {
	insert_data.clear();
	insert_queue = true;
}

void AnimationTrackEditor::commit_insert_queue() {
	bool reset_allowed = true;
	AnimationPlayer *player = AnimationPlayerEditor::get_singleton()->get_player();
	if (player->has_animation(SceneStringName(RESET)) && player->get_animation(SceneStringName(RESET)) == animation) {
		// Avoid messing with the reset animation itself.
		reset_allowed = false;
	} else {
		bool some_resettable = false;
		for (const AnimationTrackEditor::InsertData &E : insert_data) {
			if (track_type_is_resettable(E.type)) {
				some_resettable = true;
				break;
			}
		}
		if (!some_resettable) {
			reset_allowed = false;
		}
	}

	// Organize insert data.
	int num_tracks = 0;
	String last_track_query;
	bool all_bezier = true;
	for (const AnimationTrackEditor::InsertData &E : insert_data) {
		if (E.type != Animation::TYPE_VALUE && E.type != Animation::TYPE_BEZIER) {
			all_bezier = false;
		}

		if (E.track_idx == -1) {
			++num_tracks;
			last_track_query = E.query;
		}

		if (E.type != Animation::TYPE_VALUE) {
			continue;
		}

		switch (E.value.get_type()) {
			case Variant::INT:
			case Variant::FLOAT:
			case Variant::VECTOR2:
			case Variant::VECTOR3:
			case Variant::QUATERNION:
			case Variant::PLANE:
			case Variant::COLOR: {
				// Valid.
			} break;
			default: {
				all_bezier = false;
			}
		}
	}

	// Skip the confirmation dialog if the user holds Shift while clicking the key icon.
	if (!Input::get_singleton()->is_key_pressed(Key::SHIFT) && num_tracks > 0) {
		String shortcut_hint = TTR("Hold Shift when clicking the key icon to skip this dialog.");
		// Potentially a new key, does not exist.
		if (num_tracks == 1) {
			// TRANSLATORS: %s will be replaced by a phrase describing the target of track.
			insert_confirm_text->set_text(vformat(TTR("Create new track for %s and insert key?") + "\n\n" + shortcut_hint, last_track_query));
		} else {
			insert_confirm_text->set_text(vformat(TTR("Create %d new tracks and insert keys?") + "\n\n" + shortcut_hint, num_tracks));
		}

		insert_confirm_bezier->set_visible(all_bezier);
		insert_confirm_reset->set_visible(reset_allowed);

		insert_confirm->set_ok_button_text(TTR("Create"));
		insert_confirm->popup_centered();
	} else {
		_insert_track(reset_allowed && EDITOR_GET("editors/animation/default_create_reset_tracks"), all_bezier && EDITOR_GET("editors/animation/default_create_bezier_tracks"));
	}

	insert_queue = false;
}

void AnimationTrackEditor::_query_insert(const InsertData &p_id) {
	if (!insert_queue) {
		insert_data.clear();
	}

	for (const InsertData &E : insert_data) {
		// Prevent insertion of multiple tracks.
		if (E.path == p_id.path && E.type == p_id.type) {
			return; // Already inserted a track this frame.
		}
	}

	insert_data.push_back(p_id);

	// Without queue, commit immediately.
	if (!insert_queue) {
		commit_insert_queue();
	}
}

void AnimationTrackEditor::_insert_track(bool p_reset_wanted, bool p_create_beziers) {
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Animation Insert Key"));

	Ref<Animation> reset_anim;
	if (p_reset_wanted) {
		reset_anim = _create_and_get_reset_animation();
	}

	TrackIndices next_tracks(animation.ptr(), reset_anim.ptr());
	bool advance = false;
	while (insert_data.size()) {
		if (insert_data.front()->get().advance) {
			advance = true;
		}
		next_tracks = _confirm_insert(insert_data.front()->get(), next_tracks, p_reset_wanted, reset_anim, p_create_beziers);
		insert_data.pop_front();
	}

	undo_redo->commit_action();

	if (advance) {
		_edit_menu_pressed(EDIT_GOTO_NEXT_STEP_TIMELINE_ONLY);
	}
}

void AnimationTrackEditor::insert_transform_key(Node3D *p_node, const String &p_sub, const Animation::TrackType p_type, const Variant &p_value) {
	ERR_FAIL_NULL(root);
	ERR_FAIL_COND_MSG(
			(p_type != Animation::TYPE_POSITION_3D && p_type != Animation::TYPE_ROTATION_3D && p_type != Animation::TYPE_SCALE_3D),
			"Track type must be Position/Rotation/Scale 3D.");
	if (!keying) {
		return;
	}
	if (!animation.is_valid()) {
		return;
	}

	// Let's build a node path.
	String path = root->get_path_to(p_node, true);
	if (!p_sub.is_empty()) {
		path += ":" + p_sub;
	}

	NodePath np = path;

	int track_idx = -1;

	for (int i = 0; i < animation->get_track_count(); i++) {
		if (animation->track_get_path(i) != np) {
			continue;
		}
		if (animation->track_get_type(i) != p_type) {
			continue;
		}
		track_idx = i;
	}

	InsertData id;
	id.path = np;
	// TRANSLATORS: This describes the target of new animation track, will be inserted into another string.
	id.query = vformat(TTR("node '%s'"), p_node->get_name());
	id.advance = false;
	id.track_idx = track_idx;
	id.value = p_value;
	id.type = p_type;
	_query_insert(id);
}

bool AnimationTrackEditor::has_track(Node3D *p_node, const String &p_sub, const Animation::TrackType p_type) {
	ERR_FAIL_NULL_V(root, false);
	if (!keying) {
		return false;
	}
	if (!animation.is_valid()) {
		return false;
	}

	// Let's build a node path.
	String path = root->get_path_to(p_node, true);
	if (!p_sub.is_empty()) {
		path += ":" + p_sub;
	}

	int track_id = animation->find_track(path, p_type);
	if (track_id >= 0) {
		return true;
	}
	return false;
}

void AnimationTrackEditor::_insert_animation_key(NodePath p_path, const Variant &p_value) {
	String path = p_path;

	// Animation property is a special case, always creates an animation track.
	for (int i = 0; i < animation->get_track_count(); i++) {
		String np = animation->track_get_path(i);

		if (path == np && animation->track_get_type(i) == Animation::TYPE_ANIMATION) {
			// Exists.
			InsertData id;
			id.path = path;
			id.track_idx = i;
			id.value = p_value;
			id.type = Animation::TYPE_ANIMATION;
			// TRANSLATORS: This describes the target of new animation track, will be inserted into another string.
			id.query = TTR("animation");
			id.advance = false;
			// Dialog insert.
			_query_insert(id);
			return;
		}
	}

	InsertData id;
	id.path = path;
	id.track_idx = -1;
	id.value = p_value;
	id.type = Animation::TYPE_ANIMATION;
	id.query = TTR("animation");
	id.advance = false;
	// Dialog insert.
	_query_insert(id);
}

void AnimationTrackEditor::insert_node_value_key(Node *p_node, const String &p_property, const Variant &p_value, bool p_only_if_exists) {
	ERR_FAIL_NULL(root);

	// Let's build a node path.
	Node *node = p_node;
	String path = root->get_path_to(node, true);

	if (Object::cast_to<AnimationPlayer>(node) && p_property == "current_animation") {
		if (node == AnimationPlayerEditor::get_singleton()->get_player()) {
			EditorNode::get_singleton()->show_warning(TTR("AnimationPlayer can't animate itself, only other players."));
			return;
		}
		_insert_animation_key(path, p_value);
		return;
	}

	EditorSelectionHistory *history = EditorNode::get_singleton()->get_editor_selection_history();
	for (int i = 1; i < history->get_path_size(); i++) {
		String prop = history->get_path_property(i);
		ERR_FAIL_COND(prop.is_empty());
		path += ":" + prop;
	}

	path += ":" + p_property;

	NodePath np = path;

	// Locate track.

	bool inserted = false;

	for (int i = 0; i < animation->get_track_count(); i++) {
		if (animation->track_get_type(i) == Animation::TYPE_VALUE) {
			if (animation->track_get_path(i) != np) {
				continue;
			}

			InsertData id;
			id.path = np;
			id.track_idx = i;
			id.value = p_value;
			id.type = Animation::TYPE_VALUE;
			// TRANSLATORS: This describes the target of new animation track, will be inserted into another string.
			id.query = vformat(TTR("property '%s'"), p_property);
			id.advance = false;
			// Dialog insert.
			_query_insert(id);
			inserted = true;
		} else if (animation->track_get_type(i) == Animation::TYPE_BEZIER) {
			Variant value;
			String track_path = animation->track_get_path(i);
			if (track_path == np) {
				value = p_value; // All good.
			} else {
				int sep = track_path.rfind(":");
				if (sep != -1) {
					String base_path = track_path.substr(0, sep);
					if (base_path == np) {
						String value_name = track_path.substr(sep + 1);
						value = p_value.get(value_name);
					} else {
						continue;
					}
				} else {
					continue;
				}
			}

			InsertData id;
			id.path = animation->track_get_path(i);
			id.track_idx = i;
			id.value = value;
			id.type = Animation::TYPE_BEZIER;
			id.query = vformat(TTR("property '%s'"), p_property);
			id.advance = false;
			// Dialog insert.
			_query_insert(id);
			inserted = true;
		}
	}

	if (inserted || p_only_if_exists) {
		return;
	}
	InsertData id;
	id.path = np;
	id.track_idx = -1;
	id.value = p_value;
	id.type = Animation::TYPE_VALUE;
	id.query = vformat(TTR("property '%s'"), p_property);
	id.advance = false;
	// Dialog insert.
	_query_insert(id);
}

void AnimationTrackEditor::insert_value_key(const String &p_property, const Variant &p_value, bool p_advance) {
	EditorSelectionHistory *history = EditorNode::get_singleton()->get_editor_selection_history();

	ERR_FAIL_NULL(root);
	ERR_FAIL_COND(history->get_path_size() == 0);
	Object *obj = ObjectDB::get_instance(history->get_path_object(0));
	ERR_FAIL_NULL(Object::cast_to<Node>(obj));

	// Let's build a node path.
	Node *node = Object::cast_to<Node>(obj);
	String path = root->get_path_to(node, true);

	if (Object::cast_to<AnimationPlayer>(node) && p_property == "current_animation") {
		if (node == AnimationPlayerEditor::get_singleton()->get_player()) {
			EditorNode::get_singleton()->show_warning(TTR("AnimationPlayer can't animate itself, only other players."));
			return;
		}
		_insert_animation_key(path, p_value);
		return;
	}

	for (int i = 1; i < history->get_path_size(); i++) {
		String prop = history->get_path_property(i);
		ERR_FAIL_COND(prop.is_empty());
		path += ":" + prop;
	}

	path += ":" + p_property;

	NodePath np = path;

	// Locate track.

	bool inserted = false;

	make_insert_queue();
	for (int i = 0; i < animation->get_track_count(); i++) {
		if (animation->track_get_type(i) == Animation::TYPE_VALUE) {
			if (animation->track_get_path(i) != np) {
				continue;
			}

			InsertData id;
			id.path = np;
			id.track_idx = i;
			id.value = p_value;
			id.type = Animation::TYPE_VALUE;
			id.query = vformat(TTR("property '%s'"), p_property);
			id.advance = p_advance;
			// Dialog insert.
			_query_insert(id);
			inserted = true;
		} else if (animation->track_get_type(i) == Animation::TYPE_BEZIER) {
			Variant value;
			if (animation->track_get_path(i) == np) {
				value = p_value; // All good.
			} else {
				String tpath = animation->track_get_path(i);
				int index = tpath.rfind(":");
				if (NodePath(tpath.substr(0, index + 1)) == np) {
					String subindex = tpath.substr(index + 1, tpath.length() - index);
					value = p_value.get(subindex);
				} else {
					continue;
				}
			}

			InsertData id;
			id.path = animation->track_get_path(i);
			id.track_idx = i;
			id.value = value;
			id.type = Animation::TYPE_BEZIER;
			id.query = vformat(TTR("property '%s'"), p_property);
			id.advance = p_advance;
			// Dialog insert.
			_query_insert(id);
			inserted = true;
		}
	}
	commit_insert_queue();

	if (!inserted) {
		InsertData id;
		id.path = np;
		id.track_idx = -1;
		id.value = p_value;
		id.type = Animation::TYPE_VALUE;
		id.query = vformat(TTR("property '%s'"), p_property);
		id.advance = p_advance;
		// Dialog insert.
		_query_insert(id);
	}
}

Ref<Animation> AnimationTrackEditor::_create_and_get_reset_animation() {
	AnimationPlayer *player = AnimationPlayerEditor::get_singleton()->get_player();
	if (player->has_animation(SceneStringName(RESET))) {
		return player->get_animation(SceneStringName(RESET));
	} else {
		Ref<AnimationLibrary> al;
		AnimationMixer *mixer = AnimationPlayerEditor::get_singleton()->fetch_mixer_for_library();
		if (mixer) {
			if (!mixer->has_animation_library("")) {
				al.instantiate();
				mixer->add_animation_library("", al);
			} else {
				al = mixer->get_animation_library("");
			}
		}
		Ref<Animation> reset_anim;
		reset_anim.instantiate();
		reset_anim->set_length(ANIM_MIN_LENGTH);
		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
		undo_redo->add_do_method(al.ptr(), "add_animation", SceneStringName(RESET), reset_anim);
		undo_redo->add_do_method(AnimationPlayerEditor::get_singleton(), "_animation_player_changed", player);
		undo_redo->add_undo_method(al.ptr(), "remove_animation", SceneStringName(RESET));
		undo_redo->add_undo_method(AnimationPlayerEditor::get_singleton(), "_animation_player_changed", player);
		return reset_anim;
	}
}

void AnimationTrackEditor::_confirm_insert_list() {
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Animation Insert Key"));

	bool create_reset = insert_confirm_reset->is_visible() && insert_confirm_reset->is_pressed();
	Ref<Animation> reset_anim;
	if (create_reset) {
		reset_anim = _create_and_get_reset_animation();
	}

	TrackIndices next_tracks(animation.ptr(), reset_anim.ptr());
	bool advance = false;
	while (insert_data.size()) {
		if (insert_data.front()->get().advance) {
			advance = true;
		}
		next_tracks = _confirm_insert(insert_data.front()->get(), next_tracks, create_reset, reset_anim, insert_confirm_bezier->is_pressed());
		insert_data.pop_front();
	}

	undo_redo->commit_action();

	if (advance) {
		_edit_menu_pressed(EDIT_GOTO_NEXT_STEP_TIMELINE_ONLY);
	}
}

PropertyInfo AnimationTrackEditor::_find_hint_for_track(int p_idx, NodePath &r_base_path, Variant *r_current_val) {
	r_base_path = NodePath();
	ERR_FAIL_COND_V(!animation.is_valid(), PropertyInfo());
	ERR_FAIL_INDEX_V(p_idx, animation->get_track_count(), PropertyInfo());

	if (!root) {
		return PropertyInfo();
	}

	NodePath path = animation->track_get_path(p_idx);

	if (!root->has_node_and_resource(path)) {
		return PropertyInfo();
	}

	Ref<Resource> res;
	Vector<StringName> leftover_path;
	Node *node = root->get_node_and_resource(path, res, leftover_path, true);

	if (node) {
		r_base_path = node->get_path();
	}

	if (leftover_path.is_empty()) {
		if (r_current_val) {
			if (res.is_valid()) {
				*r_current_val = res;
			} else if (node) {
				*r_current_val = node;
			}
		}
		return PropertyInfo();
	}

	Variant property_info_base;
	if (res.is_valid()) {
		property_info_base = res;
		if (r_current_val) {
			*r_current_val = res->get_indexed(leftover_path);
		}
	} else if (node) {
		property_info_base = node;
		if (r_current_val) {
			*r_current_val = node->get_indexed(leftover_path);
		}
	}

	for (int i = 0; i < leftover_path.size() - 1; i++) {
		bool valid;
		property_info_base = property_info_base.get_named(leftover_path[i], valid);
	}

	if (property_info_base.is_null()) {
		WARN_PRINT(vformat("Could not determine track hint for '%s:%s' because its base property is null.",
				String(path.get_concatenated_names()), String(path.get_concatenated_subnames())));
		return PropertyInfo();
	}

	List<PropertyInfo> pinfo;
	property_info_base.get_property_list(&pinfo);

	for (const PropertyInfo &E : pinfo) {
		if (E.name == leftover_path[leftover_path.size() - 1]) {
			return E;
		}
	}

	return PropertyInfo();
}

static Vector<String> _get_bezier_subindices_for_type(Variant::Type p_type, bool *r_valid = nullptr) {
	Vector<String> subindices;
	if (r_valid) {
		*r_valid = true;
	}
	switch (p_type) {
		case Variant::INT: {
			subindices.push_back("");
		} break;
		case Variant::FLOAT: {
			subindices.push_back("");
		} break;
		case Variant::VECTOR2: {
			subindices.push_back(":x");
			subindices.push_back(":y");
		} break;
		case Variant::VECTOR3: {
			subindices.push_back(":x");
			subindices.push_back(":y");
			subindices.push_back(":z");
		} break;
		case Variant::QUATERNION: {
			subindices.push_back(":x");
			subindices.push_back(":y");
			subindices.push_back(":z");
			subindices.push_back(":w");
		} break;
		case Variant::COLOR: {
			subindices.push_back(":r");
			subindices.push_back(":g");
			subindices.push_back(":b");
			subindices.push_back(":a");
		} break;
		case Variant::PLANE: {
			subindices.push_back(":x");
			subindices.push_back(":y");
			subindices.push_back(":z");
			subindices.push_back(":d");
		} break;
		default: {
			if (r_valid) {
				*r_valid = false;
			}
		}
	}

	return subindices;
}

AnimationTrackEditor::TrackIndices AnimationTrackEditor::_confirm_insert(InsertData p_id, TrackIndices p_next_tracks, bool p_reset_wanted, Ref<Animation> p_reset_anim, bool p_create_beziers) {
	bool created = false;

	bool create_normal_track = p_id.track_idx < 0;
	bool create_reset_track = p_reset_wanted && track_type_is_resettable(p_id.type);

	Animation::UpdateMode update_mode = Animation::UPDATE_DISCRETE;
	Animation::InterpolationType interp_type = Animation::INTERPOLATION_LINEAR;
	bool loop_wrap = true;
	if (create_normal_track || create_reset_track) {
		if (p_id.type == Animation::TYPE_VALUE || p_id.type == Animation::TYPE_BEZIER) {
			_fetch_value_track_options(p_id.path, &update_mode, &interp_type, &loop_wrap);
		}
	}

	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	if (create_normal_track) {
		if (p_create_beziers) {
			bool valid;
			Vector<String> subindices = _get_bezier_subindices_for_type(p_id.value.get_type(), &valid);
			if (valid) {
				for (int i = 0; i < subindices.size(); i++) {
					InsertData id = p_id;
					id.type = Animation::TYPE_BEZIER;
					id.value = p_id.value.get(subindices[i].substr(1, subindices[i].length()));
					id.path = String(p_id.path) + subindices[i];
					p_next_tracks = _confirm_insert(id, p_next_tracks, p_reset_wanted, p_reset_anim, false);
				}

				return p_next_tracks;
			}
		}
		created = true;

		p_id.track_idx = p_next_tracks.normal;

		undo_redo->add_do_method(animation.ptr(), "add_track", p_id.type);
		undo_redo->add_do_method(animation.ptr(), "track_set_path", p_id.track_idx, p_id.path);
		undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_type", p_id.track_idx, interp_type);
		undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_loop_wrap", p_id.track_idx, loop_wrap);
		if (p_id.type == Animation::TYPE_VALUE) {
			undo_redo->add_do_method(animation.ptr(), "value_track_set_update_mode", p_id.track_idx, update_mode);
		}
	}

	float time = p_id.time == FLT_MAX ? timeline->get_play_position() : p_id.time;
	Variant value;

	switch (p_id.type) {
		case Animation::TYPE_POSITION_3D:
		case Animation::TYPE_ROTATION_3D:
		case Animation::TYPE_SCALE_3D:
		case Animation::TYPE_BLEND_SHAPE:
		case Animation::TYPE_VALUE:
		case Animation::TYPE_AUDIO:
		case Animation::TYPE_ANIMATION: {
			value = p_id.value;

		} break;
		case Animation::TYPE_BEZIER: {
			Array array;
			array.resize(5);
			array[0] = p_id.value;
			array[1] = -0.25;
			array[2] = 0;
			array[3] = 0.25;
			array[4] = 0;
			value = array;
			bezier_edit_icon->set_disabled(false);

		} break;
		default: {
			// Other track types shouldn't use this code path.
			DEV_ASSERT(false);
		}
	}

	undo_redo->add_do_method(animation.ptr(), "track_insert_key", p_id.track_idx, time, value);

	if (created) {
		// Just remove the track.
		undo_redo->add_undo_method(this, "_clear_selection", false);
		undo_redo->add_undo_method(animation.ptr(), "remove_track", animation->get_track_count());
		p_next_tracks.normal++;
	} else {
		undo_redo->add_undo_method(animation.ptr(), "track_remove_key_at_time", p_id.track_idx, time);
		int existing = animation->track_find_key(p_id.track_idx, time, Animation::FIND_MODE_APPROX);
		if (existing != -1) {
			Variant v = animation->track_get_key_value(p_id.track_idx, existing);
			float trans = animation->track_get_key_transition(p_id.track_idx, existing);
			undo_redo->add_undo_method(animation.ptr(), "track_insert_key", p_id.track_idx, time, v, trans);
		}
	}

	if (create_reset_track) {
		Animation *reset_anim = p_reset_anim.ptr();
		for (int i = 0; i < reset_anim->get_track_count(); i++) {
			if (reset_anim->track_get_path(i) == p_id.path) {
				create_reset_track = false;
				break;
			}
		}
		if (create_reset_track) {
			undo_redo->add_do_method(reset_anim, "add_track", p_id.type);
			undo_redo->add_do_method(reset_anim, "track_set_path", p_next_tracks.reset, p_id.path);
			if (p_id.type == Animation::TYPE_VALUE) {
				undo_redo->add_do_method(reset_anim, "value_track_set_update_mode", p_next_tracks.reset, update_mode);
			}
			undo_redo->add_do_method(reset_anim, "track_set_interpolation_type", p_next_tracks.reset, interp_type);
			undo_redo->add_do_method(reset_anim, "track_insert_key", p_next_tracks.reset, 0.0f, value);
			undo_redo->add_undo_method(reset_anim, "remove_track", reset_anim->get_track_count());
			p_next_tracks.reset++;
		}
	}

	return p_next_tracks;
}

void AnimationTrackEditor::show_select_node_warning(bool p_show) {
	info_message->set_visible(p_show);
}

void AnimationTrackEditor::show_dummy_player_warning(bool p_show) {
	dummy_player_warning->set_visible(p_show);
}

void AnimationTrackEditor::show_inactive_player_warning(bool p_show) {
	inactive_player_warning->set_visible(p_show);
}

bool AnimationTrackEditor::is_key_selected(int p_track, int p_key) const {
	SelectedKey sk;
	sk.key = p_key;
	sk.track = p_track;

	return selection.has(sk);
}

bool AnimationTrackEditor::is_selection_active() const {
	return selection.size();
}

bool AnimationTrackEditor::is_key_clipboard_active() const {
	return key_clipboard.keys.size();
}

bool AnimationTrackEditor::is_snap_enabled() const {
	return snap->is_pressed() ^ Input::get_singleton()->is_key_pressed(Key::CMD_OR_CTRL);
}

bool AnimationTrackEditor::can_add_reset_key() const {
	for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
		const Animation::TrackType track_type = animation->track_get_type(E.key.track);
		if (track_type != Animation::TYPE_ANIMATION && track_type != Animation::TYPE_AUDIO && track_type != Animation::TYPE_METHOD) {
			return true;
		}
	}
	return false;
}

void AnimationTrackEditor::_update_tracks() {
	int selected = _get_track_selected();

	while (track_vbox->get_child_count()) {
		memdelete(track_vbox->get_child(0));
	}

	timeline->set_track_edit(nullptr);

	track_edits.clear();
	groups.clear();

	if (animation.is_null()) {
		return;
	}

	bool file_read_only = false;
	if (!animation->get_path().is_resource_file()) {
		int srpos = animation->get_path().find("::");
		if (srpos != -1) {
			String base = animation->get_path().substr(0, srpos);
			if (ResourceLoader::get_resource_type(base) == "PackedScene") {
				if (!get_tree()->get_edited_scene_root() || get_tree()->get_edited_scene_root()->get_scene_file_path() != base) {
					file_read_only = true;
				}
			} else {
				if (FileAccess::exists(base + ".import")) {
					file_read_only = true;
				}
			}
		}
	} else {
		if (FileAccess::exists(animation->get_path() + ".import")) {
			file_read_only = true;
		}
	}

	RBMap<String, VBoxContainer *> group_sort;

	bool use_grouping = !view_group->is_pressed();
	bool use_filter = selected_filter->is_pressed();

	for (int i = 0; i < animation->get_track_count(); i++) {
		AnimationTrackEdit *track_edit = nullptr;

		// Find hint and info for plugin.

		if (use_filter) {
			NodePath path = animation->track_get_path(i);

			if (root) {
				Node *node = root->get_node_or_null(path);
				if (!node) {
					continue; // No node, no filter.
				}
				if (!EditorNode::get_singleton()->get_editor_selection()->is_selected(node)) {
					continue; // Skip track due to not selected.
				}
			}
		}

		if (animation->track_get_type(i) == Animation::TYPE_VALUE) {
			NodePath path = animation->track_get_path(i);

			if (root && root->has_node_and_resource(path)) {
				Ref<Resource> res;
				NodePath base_path;
				Vector<StringName> leftover_path;
				Node *node = root->get_node_and_resource(path, res, leftover_path, true);
				PropertyInfo pinfo = _find_hint_for_track(i, base_path);

				Object *object = node;
				if (res.is_valid()) {
					object = res.ptr();
				}

				if (object && !leftover_path.is_empty()) {
					if (pinfo.name.is_empty()) {
						pinfo.name = leftover_path[leftover_path.size() - 1];
					}

					for (int j = 0; j < track_edit_plugins.size(); j++) {
						track_edit = track_edit_plugins.write[j]->create_value_track_edit(object, pinfo.type, pinfo.name, pinfo.hint, pinfo.hint_string, pinfo.usage);
						if (track_edit) {
							break;
						}
					}
				}
			}
		}
		if (animation->track_get_type(i) == Animation::TYPE_AUDIO) {
			for (int j = 0; j < track_edit_plugins.size(); j++) {
				track_edit = track_edit_plugins.write[j]->create_audio_track_edit();
				if (track_edit) {
					break;
				}
			}
		}

		if (animation->track_get_type(i) == Animation::TYPE_ANIMATION) {
			NodePath path = animation->track_get_path(i);

			Node *node = nullptr;
			if (root) {
				node = root->get_node_or_null(path);
			}

			if (node && Object::cast_to<AnimationPlayer>(node)) {
				for (int j = 0; j < track_edit_plugins.size(); j++) {
					track_edit = track_edit_plugins.write[j]->create_animation_track_edit(node);
					if (track_edit) {
						break;
					}
				}
			}
		}

		if (track_edit == nullptr) {
			// No valid plugin_found.
			track_edit = memnew(AnimationTrackEdit);
		}

		track_edits.push_back(track_edit);

		if (use_grouping) {
			String base_path = animation->track_get_path(i);
			base_path = base_path.get_slice(":", 0); // Remove sub-path.

			if (!group_sort.has(base_path)) {
				AnimationTrackEditGroup *g = memnew(AnimationTrackEditGroup);
				Ref<Texture2D> icon = get_editor_theme_icon(SNAME("Node"));
				String name = base_path;
				String tooltip;
				if (root) {
					Node *n = root->get_node_or_null(base_path);
					if (n) {
						icon = EditorNode::get_singleton()->get_object_icon(n, "Node");
						name = n->get_name();
						tooltip = root->get_path_to(n);
					}
				}

				g->set_type_and_name(icon, name, animation->track_get_path(i));
				g->set_root(root);
				g->set_tooltip_text(tooltip);
				g->set_timeline(timeline);
				groups.push_back(g);
				VBoxContainer *vb = memnew(VBoxContainer);
				vb->add_theme_constant_override("separation", 0);
				vb->add_child(g);
				track_vbox->add_child(vb);
				group_sort[base_path] = vb;
			}

			track_edit->set_in_group(true);
			group_sort[base_path]->add_child(track_edit);

		} else {
			track_edit->set_in_group(false);
			track_vbox->add_child(track_edit);
		}

		track_edit->set_timeline(timeline);
		track_edit->set_root(root);
		track_edit->set_animation_and_track(animation, i, file_read_only);
		track_edit->set_play_position(timeline->get_play_position());
		track_edit->set_editor(this);

		if (selected == i) {
			track_edit->grab_focus();
		}

		track_edit->connect("timeline_changed", callable_mp(this, &AnimationTrackEditor::_timeline_changed));
		track_edit->connect("remove_request", callable_mp(this, &AnimationTrackEditor::_track_remove_request), CONNECT_DEFERRED);
		track_edit->connect("dropped", callable_mp(this, &AnimationTrackEditor::_dropped_track), CONNECT_DEFERRED);
		track_edit->connect("insert_key", callable_mp(this, &AnimationTrackEditor::_insert_key_from_track).bind(i), CONNECT_DEFERRED);
		track_edit->connect("select_key", callable_mp(this, &AnimationTrackEditor::_key_selected).bind(i), CONNECT_DEFERRED);
		track_edit->connect("deselect_key", callable_mp(this, &AnimationTrackEditor::_key_deselected).bind(i), CONNECT_DEFERRED);
		track_edit->connect("move_selection_begin", callable_mp(this, &AnimationTrackEditor::_move_selection_begin));
		track_edit->connect("move_selection", callable_mp(this, &AnimationTrackEditor::_move_selection));
		track_edit->connect("move_selection_commit", callable_mp(this, &AnimationTrackEditor::_move_selection_commit));
		track_edit->connect("move_selection_cancel", callable_mp(this, &AnimationTrackEditor::_move_selection_cancel));

		track_edit->connect("duplicate_request", callable_mp(this, &AnimationTrackEditor::_anim_duplicate_keys).bind(i), CONNECT_DEFERRED);
		track_edit->connect("cut_request", callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed).bind(EDIT_CUT_KEYS), CONNECT_DEFERRED);
		track_edit->connect("copy_request", callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed).bind(EDIT_COPY_KEYS), CONNECT_DEFERRED);
		track_edit->connect("paste_request", callable_mp(this, &AnimationTrackEditor::_anim_paste_keys).bind(i), CONNECT_DEFERRED);
		track_edit->connect("create_reset_request", callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed).bind(EDIT_ADD_RESET_KEY), CONNECT_DEFERRED);
		track_edit->connect("delete_request", callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed).bind(EDIT_DELETE_SELECTION), CONNECT_DEFERRED);
	}
}

void AnimationTrackEditor::_redraw_tracks() {
	for (int i = 0; i < track_edits.size(); i++) {
		track_edits[i]->queue_redraw();
	}
}

void AnimationTrackEditor::_redraw_groups() {
	for (int i = 0; i < groups.size(); i++) {
		groups[i]->queue_redraw();
	}
}

void AnimationTrackEditor::_animation_changed() {
	if (animation_changing_awaiting_update) {
		return; // All will be updated, don't bother with anything.
	}

	_check_bezier_exist();

	if (key_edit) {
		if (key_edit->setting) {
			// If editing a key, just redraw the edited track, makes refresh less costly.
			if (key_edit->track < track_edits.size()) {
				if (animation->track_get_type(key_edit->track) == Animation::TYPE_BEZIER) {
					bezier_edit->queue_redraw();
				} else {
					track_edits[key_edit->track]->queue_redraw();
				}
			}
			return;
		} else {
			_update_key_edit();
		}
	}

	animation_changing_awaiting_update = true;
	callable_mp(this, &AnimationTrackEditor::_animation_update).call_deferred();
}

void AnimationTrackEditor::_snap_mode_changed(int p_mode) {
	bool use_fps = p_mode == 1;
	timeline->set_use_fps(use_fps);
	if (key_edit) {
		key_edit->set_use_fps(use_fps);
	}
	step->set_step(use_fps ? FPS_DECIMAL : SECOND_DECIMAL);
	_update_step_spinbox();
}

void AnimationTrackEditor::_update_step_spinbox() {
	if (!animation.is_valid()) {
		return;
	}
	step->set_block_signals(true);

	if (timeline->is_using_fps()) {
		if (animation->get_step() == 0) {
			step->set_value(0);
		} else {
			// The value stored within tscn cannot restored the original FPS due to lack of precision,
			// so the value should be limited to integer.
			step->set_value(Math::round(1.0 / animation->get_step()));
		}

	} else {
		step->set_value(animation->get_step());
	}

	step->set_block_signals(false);
	_update_snap_unit();
}

void AnimationTrackEditor::_animation_update() {
	timeline->queue_redraw();
	timeline->update_values();

	bool same = true;

	if (animation.is_null()) {
		return;
	}

	if (track_edits.size() == animation->get_track_count()) {
		// Check tracks are the same.

		for (int i = 0; i < track_edits.size(); i++) {
			if (track_edits[i]->get_path() != animation->track_get_path(i)) {
				same = false;
				break;
			}
		}
	} else {
		same = false;
	}

	if (same) {
		_redraw_tracks();
		_redraw_groups();
	} else {
		_update_tracks();
	}

	bezier_edit->queue_redraw();

	_update_step_spinbox();
	emit_signal(SNAME("animation_step_changed"), animation->get_step());
	emit_signal(SNAME("animation_len_changed"), animation->get_length());

	animation_changing_awaiting_update = false;
}

MenuButton *AnimationTrackEditor::get_edit_menu() {
	return edit;
}

void AnimationTrackEditor::_notification(int p_what) {
	switch (p_what) {
		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
			if (!EditorSettings::get_singleton()->check_changed_settings_in_group("editors/panning")) {
				break;
			}
			[[fallthrough]];
		}

		case NOTIFICATION_ENTER_TREE: {
			panner->setup((ViewPanner::ControlScheme)EDITOR_GET("editors/panning/animation_editors_panning_scheme").operator int(), ED_GET_SHORTCUT("canvas_item_editor/pan_view"), bool(EDITOR_GET("editors/panning/simple_panning")));
			[[fallthrough]];
		}
		case NOTIFICATION_THEME_CHANGED: {
			zoom_icon->set_texture(get_editor_theme_icon(SNAME("Zoom")));
			bezier_edit_icon->set_icon(get_editor_theme_icon(SNAME("EditBezier")));
			snap->set_icon(get_editor_theme_icon(SNAME("Snap")));
			view_group->set_icon(get_editor_theme_icon(view_group->is_pressed() ? SNAME("AnimationTrackList") : SNAME("AnimationTrackGroup")));
			selected_filter->set_icon(get_editor_theme_icon(SNAME("AnimationFilter")));
			imported_anim_warning->set_icon(get_editor_theme_icon(SNAME("NodeWarning")));
			dummy_player_warning->set_icon(get_editor_theme_icon(SNAME("NodeWarning")));
			inactive_player_warning->set_icon(get_editor_theme_icon(SNAME("NodeWarning")));
			main_panel->add_theme_style_override(SceneStringName(panel), get_theme_stylebox(SceneStringName(panel), SNAME("Tree")));
			edit->get_popup()->set_item_icon(edit->get_popup()->get_item_index(EDIT_APPLY_RESET), get_editor_theme_icon(SNAME("Reload")));
			auto_fit->set_icon(get_editor_theme_icon(SNAME("AnimationAutoFit")));
			auto_fit_bezier->set_icon(get_editor_theme_icon(SNAME("AnimationAutoFitBezier")));
		} break;

		case NOTIFICATION_READY: {
			EditorNode::get_singleton()->get_editor_selection()->connect("selection_changed", callable_mp(this, &AnimationTrackEditor::_selection_changed));
		} break;

		case NOTIFICATION_VISIBILITY_CHANGED: {
			update_keying();
		} break;
	}
}

void AnimationTrackEditor::_update_scroll(double) {
	_redraw_tracks();
	_redraw_groups();
}

void AnimationTrackEditor::_update_step(double p_new_step) {
	if (animation.is_null()) {
		return;
	}

	_update_snap_unit();

	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Change Animation Step"));
	float step_value = p_new_step;
	if (timeline->is_using_fps()) {
		if (step_value != 0.0) {
			step_value = 1.0 / step_value;
		}
		timeline->queue_redraw();
	}
	undo_redo->add_do_method(animation.ptr(), "set_step", step_value);
	undo_redo->add_undo_method(animation.ptr(), "set_step", animation->get_step());
	step->set_block_signals(true);
	undo_redo->commit_action();
	step->set_block_signals(false);
	emit_signal(SNAME("animation_step_changed"), step_value);
}

void AnimationTrackEditor::_update_length(double p_new_len) {
	emit_signal(SNAME("animation_len_changed"), p_new_len);
}

void AnimationTrackEditor::_dropped_track(int p_from_track, int p_to_track) {
	if (p_from_track == p_to_track || p_from_track == p_to_track - 1) {
		return;
	}

	_clear_selection(true);
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Rearrange Tracks"));
	undo_redo->add_do_method(animation.ptr(), "track_move_to", p_from_track, p_to_track);
	// Take into account that the position of the tracks that come after the one removed will change.
	int to_track_real = p_to_track > p_from_track ? p_to_track - 1 : p_to_track;
	undo_redo->add_undo_method(animation.ptr(), "track_move_to", to_track_real, p_to_track > p_from_track ? p_from_track : p_from_track + 1);
	undo_redo->add_do_method(this, "_track_grab_focus", to_track_real);
	undo_redo->add_undo_method(this, "_track_grab_focus", p_from_track);
	undo_redo->commit_action();
}

void AnimationTrackEditor::_new_track_node_selected(NodePath p_path) {
	ERR_FAIL_NULL(root);
	Node *node = get_node_or_null(p_path);
	ERR_FAIL_NULL(node);
	NodePath path_to = root->get_path_to(node, true);

	if (adding_track_type == Animation::TYPE_BLEND_SHAPE && !node->is_class("MeshInstance3D")) {
		EditorNode::get_singleton()->show_warning(TTR("Blend Shape tracks only apply to MeshInstance3D nodes."));
		return;
	}

	if ((adding_track_type == Animation::TYPE_POSITION_3D || adding_track_type == Animation::TYPE_ROTATION_3D || adding_track_type == Animation::TYPE_SCALE_3D) && !node->is_class("Node3D")) {
		EditorNode::get_singleton()->show_warning(TTR("Position/Rotation/Scale 3D tracks only apply to 3D-based nodes."));
		return;
	}

	switch (adding_track_type) {
		case Animation::TYPE_VALUE: {
			adding_track_path = path_to;
			prop_selector->set_type_filter(Vector<Variant::Type>());
			prop_selector->select_property_from_instance(node);
		} break;
		case Animation::TYPE_BLEND_SHAPE: {
			adding_track_path = path_to;
			Vector<Variant::Type> filter;
			filter.push_back(Variant::FLOAT);
			prop_selector->set_type_filter(filter);
			prop_selector->select_property_from_instance(node);
		} break;
		case Animation::TYPE_POSITION_3D:
		case Animation::TYPE_ROTATION_3D:
		case Animation::TYPE_SCALE_3D:
		case Animation::TYPE_METHOD: {
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Add Track"));
			undo_redo->add_do_method(animation.ptr(), "add_track", adding_track_type);
			undo_redo->add_do_method(animation.ptr(), "track_set_path", animation->get_track_count(), path_to);
			undo_redo->add_undo_method(animation.ptr(), "remove_track", animation->get_track_count());
			undo_redo->commit_action();

		} break;
		case Animation::TYPE_BEZIER: {
			Vector<Variant::Type> filter;
			filter.push_back(Variant::INT);
			filter.push_back(Variant::FLOAT);
			filter.push_back(Variant::VECTOR2);
			filter.push_back(Variant::VECTOR3);
			filter.push_back(Variant::QUATERNION);
			filter.push_back(Variant::PLANE);
			filter.push_back(Variant::COLOR);

			adding_track_path = path_to;
			prop_selector->set_type_filter(filter);
			prop_selector->select_property_from_instance(node);
		} break;
		case Animation::TYPE_AUDIO: {
			if (!node->is_class("AudioStreamPlayer") && !node->is_class("AudioStreamPlayer2D") && !node->is_class("AudioStreamPlayer3D")) {
				EditorNode::get_singleton()->show_warning(TTR("Audio tracks can only point to nodes of type:\n-AudioStreamPlayer\n-AudioStreamPlayer2D\n-AudioStreamPlayer3D"));
				return;
			}

			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Add Track"));
			undo_redo->add_do_method(animation.ptr(), "add_track", adding_track_type);
			undo_redo->add_do_method(animation.ptr(), "track_set_path", animation->get_track_count(), path_to);
			undo_redo->add_undo_method(animation.ptr(), "remove_track", animation->get_track_count());
			undo_redo->commit_action();

		} break;
		case Animation::TYPE_ANIMATION: {
			if (!node->is_class("AnimationPlayer")) {
				EditorNode::get_singleton()->show_warning(TTR("Animation tracks can only point to AnimationPlayer nodes."));
				return;
			}

			if (node == AnimationPlayerEditor::get_singleton()->get_player()) {
				EditorNode::get_singleton()->show_warning(TTR("AnimationPlayer can't animate itself, only other players."));
				return;
			}

			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Add Track"));
			undo_redo->add_do_method(animation.ptr(), "add_track", adding_track_type);
			undo_redo->add_do_method(animation.ptr(), "track_set_path", animation->get_track_count(), path_to);
			undo_redo->add_undo_method(animation.ptr(), "remove_track", animation->get_track_count());
			undo_redo->commit_action();

		} break;
	}
}

void AnimationTrackEditor::_add_track(int p_type) {
	AnimationPlayer *ap = AnimationPlayerEditor::get_singleton()->get_player();
	if (!ap) {
		ERR_FAIL_EDMSG("No AnimationPlayer is currently being edited.");
	}
	Node *root_node = ap->get_node_or_null(ap->get_root_node());
	if (!root_node) {
		EditorNode::get_singleton()->show_warning(TTR("Not possible to add a new track without a root"));
		return;
	}
	adding_track_type = p_type;
	pick_track->popup_scenetree_dialog(nullptr, root_node);
	pick_track->get_filter_line_edit()->clear();
	pick_track->get_filter_line_edit()->grab_focus();
}

void AnimationTrackEditor::_fetch_value_track_options(const NodePath &p_path, Animation::UpdateMode *r_update_mode, Animation::InterpolationType *r_interpolation_type, bool *r_loop_wrap) {
	AnimationPlayer *player = AnimationPlayerEditor::get_singleton()->get_player();
	if (player->has_animation(SceneStringName(RESET))) {
		Ref<Animation> reset_anim = player->get_animation(SceneStringName(RESET));
		int rt = reset_anim->find_track(p_path, Animation::TrackType::TYPE_VALUE);
		if (rt >= 0) {
			*r_update_mode = reset_anim->value_track_get_update_mode(rt);
			*r_interpolation_type = reset_anim->track_get_interpolation_type(rt);
			*r_loop_wrap = reset_anim->track_get_interpolation_loop_wrap(rt);
			return;
		}
		rt = reset_anim->find_track(p_path, Animation::TrackType::TYPE_BEZIER);
		if (rt >= 0) {
			*r_interpolation_type = reset_anim->track_get_interpolation_type(rt);
			*r_loop_wrap = reset_anim->track_get_interpolation_loop_wrap(rt);
			return;
		}
	}

	// Hack.
	NodePath np;
	animation->add_track(Animation::TYPE_VALUE);
	animation->track_set_path(animation->get_track_count() - 1, p_path);
	PropertyInfo h = _find_hint_for_track(animation->get_track_count() - 1, np);
	animation->remove_track(animation->get_track_count() - 1); // Hack.
	switch (h.type) {
		case Variant::FLOAT: {
#ifdef DISABLE_DEPRECATED
			bool is_angle = h.type == Variant::FLOAT && h.hint_string.contains("radians_as_degrees");
#else
			bool is_angle = h.type == Variant::FLOAT && h.hint_string.contains("radians");
#endif // DISABLE_DEPRECATED
			if (is_angle) {
				*r_interpolation_type = Animation::INTERPOLATION_LINEAR_ANGLE;
			}
			[[fallthrough]];
		}
		case Variant::VECTOR2:
		case Variant::RECT2:
		case Variant::VECTOR3:
		case Variant::TRANSFORM2D:
		case Variant::VECTOR4:
		case Variant::PLANE:
		case Variant::QUATERNION:
		case Variant::AABB:
		case Variant::BASIS:
		case Variant::TRANSFORM3D:
		case Variant::PROJECTION:
		case Variant::COLOR:
		case Variant::PACKED_FLOAT32_ARRAY:
		case Variant::PACKED_FLOAT64_ARRAY:
		case Variant::PACKED_VECTOR2_ARRAY:
		case Variant::PACKED_VECTOR3_ARRAY:
		case Variant::PACKED_COLOR_ARRAY:
		case Variant::PACKED_VECTOR4_ARRAY: {
			*r_update_mode = Animation::UPDATE_CONTINUOUS;
		} break;
		default: {
		}
	}
}

void AnimationTrackEditor::_new_track_property_selected(const String &p_name) {
	String full_path = String(adding_track_path) + ":" + p_name;

	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();

	Animation::UpdateMode update_mode = Animation::UPDATE_DISCRETE;
	Animation::InterpolationType interp_type = Animation::INTERPOLATION_LINEAR;
	bool loop_wrap = true;
	_fetch_value_track_options(full_path, &update_mode, &interp_type, &loop_wrap);
	if (adding_track_type == Animation::TYPE_VALUE) {
		undo_redo->create_action(TTR("Add Track"));
		undo_redo->add_do_method(animation.ptr(), "add_track", adding_track_type);
		undo_redo->add_do_method(animation.ptr(), "track_set_path", animation->get_track_count(), full_path);
		undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_type", animation->get_track_count(), interp_type);
		undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_loop_wrap", animation->get_track_count(), loop_wrap);
		undo_redo->add_do_method(animation.ptr(), "value_track_set_update_mode", animation->get_track_count(), update_mode);
		undo_redo->add_undo_method(animation.ptr(), "remove_track", animation->get_track_count());
		undo_redo->commit_action();
	} else {
		Vector<String> subindices;
		{
			// Hack.
			NodePath np;
			animation->add_track(Animation::TYPE_VALUE);
			animation->track_set_path(animation->get_track_count() - 1, full_path);
			PropertyInfo h = _find_hint_for_track(animation->get_track_count() - 1, np);
			animation->remove_track(animation->get_track_count() - 1); // Hack.
			bool valid;
			subindices = _get_bezier_subindices_for_type(h.type, &valid);
			if (!valid) {
				EditorNode::get_singleton()->show_warning(TTR("Invalid track for Bezier (no suitable sub-properties)"));
				return;
			}
		}

		undo_redo->create_action(TTR("Add Bezier Track"));
		int base_track = animation->get_track_count();
		for (int i = 0; i < subindices.size(); i++) {
			int track_idx = base_track + i;
			undo_redo->add_do_method(animation.ptr(), "add_track", adding_track_type);
			undo_redo->add_do_method(animation.ptr(), "track_set_path", track_idx, full_path + subindices[i]);
			undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_type", track_idx, interp_type);
			undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_loop_wrap", track_idx, loop_wrap);
			undo_redo->add_undo_method(animation.ptr(), "remove_track", base_track);
		}
		undo_redo->commit_action();
	}
}

void AnimationTrackEditor::_timeline_value_changed(double) {
	timeline->update_play_position();

	_redraw_tracks();
	for (int i = 0; i < track_edits.size(); i++) {
		track_edits[i]->update_play_position();
	}
	_redraw_groups();

	bezier_edit->queue_redraw();
	bezier_edit->update_play_position();
}

int AnimationTrackEditor::_get_track_selected() {
	for (int i = 0; i < track_edits.size(); i++) {
		if (track_edits[i]->has_focus()) {
			return i;
		}
	}

	return -1;
}

void AnimationTrackEditor::_insert_key_from_track(float p_ofs, int p_track) {
	ERR_FAIL_INDEX(p_track, animation->get_track_count());

	if (snap->is_pressed() && step->get_value() != 0) {
		p_ofs = snap_time(p_ofs);
	}
	while (animation->track_find_key(p_track, p_ofs, Animation::FIND_MODE_APPROX) != -1) { // Make sure insertion point is valid.
		p_ofs += SECOND_DECIMAL;
	}

	Node *node = root->get_node_or_null(animation->track_get_path(p_track));
	if (!node) {
		EditorNode::get_singleton()->show_warning(TTR("Track path is invalid, so can't add a key."));
		return;
	}

	// Special handling for this one.
	if (animation->track_get_type(p_track) == Animation::TYPE_METHOD) {
		method_selector->select_method_from_instance(node);

		insert_key_from_track_call_ofs = p_ofs;
		insert_key_from_track_call_track = p_track;
		return;
	}

	InsertData id;
	id.path = animation->track_get_path(p_track);
	id.advance = false;
	id.track_idx = p_track;
	id.type = animation->track_get_type(p_track);
	// TRANSLATORS: This describes the target of new animation track, will be inserted into another string.
	id.query = vformat(TTR("node '%s'"), node->get_name());
	id.time = p_ofs;
	// id.value is filled in each case handled below.

	switch (animation->track_get_type(p_track)) {
		case Animation::TYPE_POSITION_3D: {
			Node3D *base = Object::cast_to<Node3D>(node);

			if (!base) {
				EditorNode::get_singleton()->show_warning(TTR("Track is not of type Node3D, can't insert key"));
				return;
			}

			id.value = base->get_position();
		} break;
		case Animation::TYPE_ROTATION_3D: {
			Node3D *base = Object::cast_to<Node3D>(node);

			if (!base) {
				EditorNode::get_singleton()->show_warning(TTR("Track is not of type Node3D, can't insert key"));
				return;
			}

			id.value = base->get_transform().basis.operator Quaternion();
		} break;
		case Animation::TYPE_SCALE_3D: {
			Node3D *base = Object::cast_to<Node3D>(node);

			if (!base) {
				EditorNode::get_singleton()->show_warning(TTR("Track is not of type Node3D, can't insert key"));
				return;
			}

			id.value = base->get_scale();
		} break;
		case Animation::TYPE_BLEND_SHAPE:
		case Animation::TYPE_VALUE: {
			NodePath bp;
			_find_hint_for_track(p_track, bp, &id.value);
		} break;
		case Animation::TYPE_METHOD: {
			Node *base = root->get_node_or_null(animation->track_get_path(p_track));
			ERR_FAIL_NULL(base);

			method_selector->select_method_from_instance(base);

			insert_key_from_track_call_ofs = p_ofs;
			insert_key_from_track_call_track = p_track;

		} break;
		case Animation::TYPE_BEZIER: {
			NodePath bp;
			Variant value;
			_find_hint_for_track(p_track, bp, &value);
			Array arr;
			arr.resize(5);
			arr[0] = value;
			arr[1] = -0.25;
			arr[2] = 0;
			arr[3] = 0.25;
			arr[4] = 0;

			id.value = arr;
		} break;
		case Animation::TYPE_AUDIO: {
			Dictionary ak;
			ak["stream"] = Ref<Resource>();
			ak["start_offset"] = 0;
			ak["end_offset"] = 0;

			id.value = ak;
		} break;
		case Animation::TYPE_ANIMATION: {
			id.value = StringName("[stop]");
		} break;
		default: {
			// All track types should be handled by now.
			DEV_ASSERT(false);
		}
	}

	_query_insert(id);
}

void AnimationTrackEditor::_add_method_key(const String &p_method) {
	if (!root->has_node(animation->track_get_path(insert_key_from_track_call_track))) {
		EditorNode::get_singleton()->show_warning(TTR("Track path is invalid, so can't add a method key."));
		return;
	}
	Node *base = root->get_node_or_null(animation->track_get_path(insert_key_from_track_call_track));
	ERR_FAIL_NULL(base);

	List<MethodInfo> minfo;
	base->get_method_list(&minfo);

	for (const MethodInfo &E : minfo) {
		if (E.name == p_method) {
			Dictionary d;
			d["method"] = p_method;
			Array params;
			int first_defarg = E.arguments.size() - E.default_arguments.size();

			int i = 0;
			for (List<PropertyInfo>::ConstIterator itr = E.arguments.begin(); itr != E.arguments.end(); ++itr, ++i) {
				if (i >= first_defarg) {
					Variant arg = E.default_arguments[i - first_defarg];
					params.push_back(arg);
				} else {
					Callable::CallError ce;
					Variant arg;
					Variant::construct(itr->type, arg, nullptr, 0, ce);
					params.push_back(arg);
				}
			}
			d["args"] = params;

			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Add Method Track Key"));
			undo_redo->add_do_method(animation.ptr(), "track_insert_key", insert_key_from_track_call_track, insert_key_from_track_call_ofs, d);
			undo_redo->add_undo_method(this, "_clear_selection_for_anim", animation);
			undo_redo->add_undo_method(animation.ptr(), "track_remove_key_at_time", insert_key_from_track_call_track, insert_key_from_track_call_ofs);
			undo_redo->commit_action();

			return;
		}
	}

	EditorNode::get_singleton()->show_warning(TTR("Method not found in object:") + " " + p_method);
}

void AnimationTrackEditor::_key_selected(int p_key, bool p_single, int p_track) {
	ERR_FAIL_INDEX(p_track, animation->get_track_count());
	ERR_FAIL_INDEX(p_key, animation->track_get_key_count(p_track));

	SelectedKey sk;
	sk.key = p_key;
	sk.track = p_track;

	if (p_single) {
		_clear_selection();
	}

	KeyInfo ki;
	ki.pos = animation->track_get_key_time(p_track, p_key);
	selection[sk] = ki;

	_redraw_tracks();
	_update_key_edit();
}

void AnimationTrackEditor::_key_deselected(int p_key, int p_track) {
	ERR_FAIL_INDEX(p_track, animation->get_track_count());
	ERR_FAIL_INDEX(p_key, animation->track_get_key_count(p_track));

	SelectedKey sk;
	sk.key = p_key;
	sk.track = p_track;

	selection.erase(sk);

	_redraw_tracks();
	_update_key_edit();
}

void AnimationTrackEditor::_move_selection_begin() {
	moving_selection = true;
	moving_selection_offset = 0;
}

void AnimationTrackEditor::_move_selection(float p_offset) {
	moving_selection_offset = p_offset;
	_redraw_tracks();
}

struct _AnimMoveRestore {
	int track = 0;
	float time = 0;
	Variant key;
	float transition = 0;
};
// Used for undo/redo.

void AnimationTrackEditor::_clear_key_edit() {
	if (key_edit) {
		// If key edit is the object being inspected, remove it first.
		if (InspectorDock::get_inspector_singleton()->get_edited_object() == key_edit) {
			EditorNode::get_singleton()->push_item(nullptr);
		}

		// Then actually delete it.
		memdelete(key_edit);
		key_edit = nullptr;
	}

	if (multi_key_edit) {
		if (InspectorDock::get_inspector_singleton()->get_edited_object() == multi_key_edit) {
			EditorNode::get_singleton()->push_item(nullptr);
		}

		memdelete(multi_key_edit);
		multi_key_edit = nullptr;
	}
}

void AnimationTrackEditor::_clear_selection(bool p_update) {
	selection.clear();

	if (p_update) {
		_redraw_tracks();
	}

	_clear_key_edit();
}

void AnimationTrackEditor::_update_key_edit() {
	_clear_key_edit();
	if (!animation.is_valid()) {
		return;
	}

	if (selection.size() == 1) {
		key_edit = memnew(AnimationTrackKeyEdit);
		key_edit->animation = animation;
		key_edit->animation_read_only = read_only;
		key_edit->track = selection.front()->key().track;
		key_edit->use_fps = timeline->is_using_fps();
		key_edit->editor = this;

		int key_id = selection.front()->key().key;
		if (key_id >= animation->track_get_key_count(key_edit->track)) {
			_clear_key_edit();
			return; // Probably in the process of rearranging the keys.
		}
		float ofs = animation->track_get_key_time(key_edit->track, key_id);
		key_edit->key_ofs = ofs;
		key_edit->root_path = root;

		NodePath np;
		key_edit->hint = _find_hint_for_track(key_edit->track, np);
		key_edit->base = np;

		EditorNode::get_singleton()->push_item(key_edit);
	} else if (selection.size() > 1) {
		multi_key_edit = memnew(AnimationMultiTrackKeyEdit);
		multi_key_edit->animation = animation;
		multi_key_edit->animation_read_only = read_only;
		multi_key_edit->editor = this;

		RBMap<int, List<float>> key_ofs_map;
		RBMap<int, NodePath> base_map;
		int first_track = -1;
		for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
			int track = E.key.track;
			if (first_track < 0) {
				first_track = track;
			}

			if (!key_ofs_map.has(track)) {
				key_ofs_map[track] = List<float>();
				base_map[track] = NodePath();
			}

			int key_id = E.key.key;
			if (key_id >= animation->track_get_key_count(track)) {
				_clear_key_edit();
				return; // Probably in the process of rearranging the keys.
			}
			key_ofs_map[track].push_back(animation->track_get_key_time(track, E.key.key));
		}
		multi_key_edit->key_ofs_map = key_ofs_map;
		multi_key_edit->base_map = base_map;
		multi_key_edit->hint = _find_hint_for_track(first_track, base_map[first_track]);
		multi_key_edit->use_fps = timeline->is_using_fps();
		multi_key_edit->root_path = root;

		EditorNode::get_singleton()->push_item(multi_key_edit);
	}
}

void AnimationTrackEditor::_clear_selection_for_anim(const Ref<Animation> &p_anim) {
	if (animation != p_anim) {
		return;
	}

	_clear_selection();
}

void AnimationTrackEditor::_select_at_anim(const Ref<Animation> &p_anim, int p_track, float p_pos) {
	if (animation != p_anim) {
		return;
	}

	int idx = animation->track_find_key(p_track, p_pos, Animation::FIND_MODE_APPROX);
	ERR_FAIL_COND(idx < 0);

	SelectedKey sk;
	sk.track = p_track;
	sk.key = idx;
	KeyInfo ki;
	ki.pos = p_pos;

	selection.insert(sk, ki);
	_update_key_edit();
}

void AnimationTrackEditor::_move_selection_commit() {
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Animation Move Keys"));

	List<_AnimMoveRestore> to_restore;

	float motion = moving_selection_offset;
	// 1 - remove the keys.
	for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
		undo_redo->add_do_method(animation.ptr(), "track_remove_key", E->key().track, E->key().key);
	}
	// 2 - Remove overlapped keys.
	for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
		float newtime = E->get().pos + motion;
		int idx = animation->track_find_key(E->key().track, newtime, Animation::FIND_MODE_APPROX);
		if (idx == -1) {
			continue;
		}
		SelectedKey sk;
		sk.key = idx;
		sk.track = E->key().track;
		if (selection.has(sk)) {
			continue; // Already in selection, don't save.
		}

		undo_redo->add_do_method(animation.ptr(), "track_remove_key_at_time", E->key().track, newtime);
		_AnimMoveRestore amr;

		amr.key = animation->track_get_key_value(E->key().track, idx);
		amr.track = E->key().track;
		amr.time = newtime;
		amr.transition = animation->track_get_key_transition(E->key().track, idx);

		to_restore.push_back(amr);
	}

	// 3 - Move the keys (Reinsert them).
	for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
		float newpos = E->get().pos + motion;
		undo_redo->add_do_method(animation.ptr(), "track_insert_key", E->key().track, newpos, animation->track_get_key_value(E->key().track, E->key().key), animation->track_get_key_transition(E->key().track, E->key().key));
	}

	// 4 - (Undo) Remove inserted keys.
	for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
		float newpos = E->get().pos + motion;
		undo_redo->add_undo_method(animation.ptr(), "track_remove_key_at_time", E->key().track, newpos);
	}

	// 5 - (Undo) Reinsert keys.
	for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
		undo_redo->add_undo_method(animation.ptr(), "track_insert_key", E->key().track, E->get().pos, animation->track_get_key_value(E->key().track, E->key().key), animation->track_get_key_transition(E->key().track, E->key().key));
	}

	// 6 - (Undo) Reinsert overlapped keys.
	for (_AnimMoveRestore &amr : to_restore) {
		undo_redo->add_undo_method(animation.ptr(), "track_insert_key", amr.track, amr.time, amr.key, amr.transition);
	}

	undo_redo->add_do_method(this, "_clear_selection_for_anim", animation);
	undo_redo->add_undo_method(this, "_clear_selection_for_anim", animation);

	// 7 - Reselect.
	for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
		float oldpos = E->get().pos;
		float newpos = oldpos + motion;

		undo_redo->add_do_method(this, "_select_at_anim", animation, E->key().track, newpos);
		undo_redo->add_undo_method(this, "_select_at_anim", animation, E->key().track, oldpos);
	}

	moving_selection = false;
	undo_redo->add_do_method(this, "_redraw_tracks");
	undo_redo->add_undo_method(this, "_redraw_tracks");
	undo_redo->commit_action();
}

void AnimationTrackEditor::_move_selection_cancel() {
	moving_selection = false;
	_redraw_tracks();
}

bool AnimationTrackEditor::is_moving_selection() const {
	return moving_selection;
}

float AnimationTrackEditor::get_moving_selection_offset() const {
	return moving_selection_offset;
}

void AnimationTrackEditor::_box_selection_draw() {
	const Rect2 selection_rect = Rect2(Point2(), box_selection->get_size());
	box_selection->draw_rect(selection_rect, get_theme_color(SNAME("box_selection_fill_color"), EditorStringName(Editor)));
	box_selection->draw_rect(selection_rect, get_theme_color(SNAME("box_selection_stroke_color"), EditorStringName(Editor)), false, Math::round(EDSCALE));
}

void AnimationTrackEditor::_scroll_input(const Ref<InputEvent> &p_event) {
	if (panner->gui_input(p_event)) {
		scroll->accept_event();
		return;
	}

	Ref<InputEventMouseButton> mb = p_event;

	if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT) {
		if (mb->is_pressed()) {
			box_selecting = true;
			box_selecting_from = scroll->get_global_transform().xform(mb->get_position());
			box_select_rect = Rect2();
		} else if (box_selecting) {
			if (box_selection->is_visible_in_tree()) {
				// Only if moved.
				for (int i = 0; i < track_edits.size(); i++) {
					Rect2 local_rect = box_select_rect;
					local_rect.position -= track_edits[i]->get_global_position();
					track_edits[i]->append_to_selection(local_rect, mb->is_command_or_control_pressed());
				}

				if (_get_track_selected() == -1 && track_edits.size() > 0) { // Minimal hack to make shortcuts work.
					track_edits[track_edits.size() - 1]->grab_focus();
				}
			} else if (!mb->is_command_or_control_pressed() && !mb->is_shift_pressed()) {
				_clear_selection(true); // Clear it.
			}

			box_selection->hide();
			box_selecting = false;
		}
	}

	Ref<InputEventMouseMotion> mm = p_event;

	if (mm.is_valid() && box_selecting) {
		if (!mm->get_button_mask().has_flag(MouseButtonMask::LEFT)) {
			// No longer.
			box_selection->hide();
			box_selecting = false;
			return;
		}

		if (!box_selection->is_visible_in_tree()) {
			if (!mm->is_command_or_control_pressed() && !mm->is_shift_pressed()) {
				_clear_selection(true);
			}
			box_selection->show();
		}

		Vector2 from = box_selecting_from;
		Vector2 to = scroll->get_global_transform().xform(mm->get_position());

		if (from.x > to.x) {
			SWAP(from.x, to.x);
		}

		if (from.y > to.y) {
			SWAP(from.y, to.y);
		}

		Rect2 rect(from, to - from);
		Rect2 scroll_rect = Rect2(scroll->get_global_position(), scroll->get_size());
		rect = scroll_rect.intersection(rect);
		box_selection->set_position(rect.position);
		box_selection->set_size(rect.size);

		box_select_rect = rect;
	}
}

void AnimationTrackEditor::_toggle_bezier_edit() {
	if (bezier_edit->is_visible()) {
		_cancel_bezier_edit();
	} else {
		int track_count = animation->get_track_count();
		for (int i = 0; i < track_count; ++i) {
			if (animation->track_get_type(i) == Animation::TrackType::TYPE_BEZIER) {
				_bezier_edit(i);
				return;
			}
		}
	}
}

void AnimationTrackEditor::_pan_callback(Vector2 p_scroll_vec, Ref<InputEvent> p_event) {
	Ref<InputEventWithModifiers> iewm = p_event;
	if (iewm.is_valid() && iewm->is_alt_pressed()) {
		if (p_scroll_vec.x < 0 || p_scroll_vec.y < 0) {
			goto_prev_step(true);
		} else {
			goto_next_step(true);
		}
	} else {
		timeline->set_value(timeline->get_value() - p_scroll_vec.x / timeline->get_zoom_scale());
		scroll->set_v_scroll(scroll->get_v_scroll() - p_scroll_vec.y);
	}
}

void AnimationTrackEditor::_zoom_callback(float p_zoom_factor, Vector2 p_origin, Ref<InputEvent> p_event) {
	timeline->_zoom_callback(p_zoom_factor, p_origin, p_event);
}

void AnimationTrackEditor::_cancel_bezier_edit() {
	bezier_edit->hide();
	scroll->show();
	bezier_edit_icon->set_pressed(false);
	auto_fit->show();
	auto_fit_bezier->hide();
}

void AnimationTrackEditor::_bezier_edit(int p_for_track) {
	_clear_selection(); // Bezier probably wants to use a separate selection mode.
	bezier_edit->set_root(root);
	bezier_edit->set_animation_and_track(animation, p_for_track, read_only);
	scroll->hide();
	bezier_edit->show();
	auto_fit->hide();
	auto_fit_bezier->show();
	// Search everything within the track and curve - edit it.
}

void AnimationTrackEditor::_bezier_track_set_key_handle_mode(Animation *p_anim, int p_track, int p_index, Animation::HandleMode p_mode, Animation::HandleSetMode p_set_mode) {
	if (!p_anim) {
		return;
	}
	p_anim->bezier_track_set_key_handle_mode(p_track, p_index, p_mode, p_set_mode);
}

void AnimationTrackEditor::_anim_duplicate_keys(float p_ofs, bool p_ofs_valid, int p_track) {
	if (selection.size() && animation.is_valid()) {
		int top_track = 0x7FFFFFFF;
		float top_time = 1e10;
		for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
			const SelectedKey &sk = E->key();

			float t = animation->track_get_key_time(sk.track, sk.key);
			if (t < top_time) {
				top_time = t;
			}
			if (sk.track < top_track) {
				top_track = sk.track;
			}
		}
		ERR_FAIL_COND(top_track == 0x7FFFFFFF || top_time == 1e10);

		int start_track = p_track;
		if (p_track == -1) { // Duplicating from shortcut or Edit menu.
			bool is_valid_track_selected = _get_track_selected() >= 0 && _get_track_selected() < animation->get_track_count();
			start_track = is_valid_track_selected ? _get_track_selected() : top_track;
		}

		bool all_compatible = true;

		for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
			const SelectedKey &sk = E->key();
			int dst_track = sk.track + (start_track - top_track);

			if (dst_track < 0 || dst_track >= animation->get_track_count()) {
				all_compatible = false;
				break;
			}

			Variant::Type value_type = animation->track_get_key_value(sk.track, sk.key).get_type();
			Animation::TrackType track_type = animation->track_get_type(sk.track);
			if (!_is_track_compatible(dst_track, value_type, track_type)) {
				all_compatible = false;
				break;
			}
		}

		ERR_FAIL_COND_MSG(!all_compatible, "Duplicate failed: Not all animation keys were compatible with their target tracks");

		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
		undo_redo->create_action(TTR("Animation Duplicate Keys"));

		List<Pair<int, float>> new_selection_values;

		for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
			const SelectedKey &sk = E->key();

			float t = animation->track_get_key_time(sk.track, sk.key);
			float insert_pos = p_ofs_valid ? p_ofs : timeline->get_play_position();

			if (p_ofs_valid) {
				if (snap->is_pressed() && step->get_value() != 0) {
					insert_pos = snap_time(insert_pos);
				}
			}

			float dst_time = t + (insert_pos - top_time);
			int dst_track = sk.track + (start_track - top_track);

			if (dst_track < 0 || dst_track >= animation->get_track_count()) {
				continue;
			}

			int existing_idx = animation->track_find_key(dst_track, dst_time, Animation::FIND_MODE_APPROX);

			Variant value = animation->track_get_key_value(sk.track, sk.key);
			bool key_is_bezier = animation->track_get_type(sk.track) == Animation::TYPE_BEZIER;
			bool track_is_bezier = animation->track_get_type(dst_track) == Animation::TYPE_BEZIER;
			if (key_is_bezier && !track_is_bezier) {
				value = AnimationBezierTrackEdit::get_bezier_key_value(value);
			} else if (!key_is_bezier && track_is_bezier) {
				value = AnimationBezierTrackEdit::make_default_bezier_key(value);
			}

			undo_redo->add_do_method(animation.ptr(), "track_insert_key", dst_track, dst_time, value, animation->track_get_key_transition(E->key().track, E->key().key));
			undo_redo->add_undo_method(animation.ptr(), "track_remove_key_at_time", dst_track, dst_time);

			Pair<int, float> p;
			p.first = dst_track;
			p.second = dst_time;
			new_selection_values.push_back(p);

			if (existing_idx != -1) {
				undo_redo->add_undo_method(animation.ptr(), "track_insert_key", dst_track, dst_time, animation->track_get_key_value(dst_track, existing_idx), animation->track_get_key_transition(dst_track, existing_idx));
			}
		}

		undo_redo->add_do_method(this, "_clear_selection_for_anim", animation);
		undo_redo->add_undo_method(this, "_clear_selection_for_anim", animation);

		// Reselect duplicated.
		RBMap<SelectedKey, KeyInfo> new_selection;
		for (const Pair<int, float> &E : new_selection_values) {
			undo_redo->add_do_method(this, "_select_at_anim", animation, E.first, E.second);
		}
		for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
			undo_redo->add_undo_method(this, "_select_at_anim", animation, E->key().track, E->get().pos);
		}

		undo_redo->add_do_method(this, "_redraw_tracks");
		undo_redo->add_undo_method(this, "_redraw_tracks");
		undo_redo->commit_action();
	}
}

void AnimationTrackEditor::_anim_copy_keys(bool p_cut) {
	if (is_selection_active() && animation.is_valid()) {
		int top_track = 0x7FFFFFFF;
		float top_time = 1e10;

		for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
			const SelectedKey &sk = E->key();

			float t = animation->track_get_key_time(sk.track, sk.key);
			if (t < top_time) {
				top_time = t;
			}
			if (sk.track < top_track) {
				top_track = sk.track;
			}
		}

		ERR_FAIL_COND(top_track == 0x7FFFFFFF || top_time == 1e10);

		_set_key_clipboard(top_track, top_time, selection);

		if (p_cut) {
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Animation Cut Keys"), UndoRedo::MERGE_DISABLE, animation.ptr());
			undo_redo->add_do_method(this, "_clear_selection_for_anim", animation);
			undo_redo->add_undo_method(this, "_clear_selection_for_anim", animation);
			for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
				int track_idx = E->key().track;
				int key_idx = E->key().key;
				float time = E->value().pos;
				undo_redo->add_do_method(animation.ptr(), "track_remove_key_at_time", track_idx, time);
				undo_redo->add_undo_method(animation.ptr(), "track_insert_key", track_idx, time, animation->track_get_key_value(track_idx, key_idx), animation->track_get_key_transition(track_idx, key_idx));
			}
			for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
				undo_redo->add_undo_method(this, "_select_at_anim", animation, E->key().track, E->value().pos);
			}
			undo_redo->commit_action();
		}
	}
}

void AnimationTrackEditor::_set_key_clipboard(int p_top_track, float p_top_time, RBMap<SelectedKey, KeyInfo> &p_keys) {
	key_clipboard.keys.clear();
	key_clipboard.top_track = p_top_track;
	for (RBMap<SelectedKey, KeyInfo>::Element *E = p_keys.back(); E; E = E->prev()) {
		KeyClipboard::Key k;
		k.value = animation->track_get_key_value(E->key().track, E->key().key);
		k.transition = animation->track_get_key_transition(E->key().track, E->key().key);
		k.time = E->value().pos - p_top_time;
		k.track = E->key().track - p_top_track;
		k.track_type = animation->track_get_type(E->key().track);

		key_clipboard.keys.push_back(k);
	}
}

void AnimationTrackEditor::_anim_paste_keys(float p_ofs, bool p_ofs_valid, int p_track) {
	if (is_key_clipboard_active() && animation.is_valid()) {
		int start_track = p_track;
		if (p_track == -1) { // Pasting from shortcut or Edit menu.
			bool is_valid_track_selected = _get_track_selected() >= 0 && _get_track_selected() < animation->get_track_count();
			start_track = is_valid_track_selected ? _get_track_selected() : key_clipboard.top_track;
		}

		bool all_compatible = true;

		for (int i = 0; i < key_clipboard.keys.size(); i++) {
			const KeyClipboard::Key key = key_clipboard.keys[i];

			int dst_track = key.track + start_track;

			if (dst_track < 0 || dst_track >= animation->get_track_count()) {
				all_compatible = false;
				break;
			}

			if (!_is_track_compatible(dst_track, key.value.get_type(), key.track_type)) {
				all_compatible = false;
				break;
			}
		}

		ERR_FAIL_COND_MSG(!all_compatible, "Paste failed: Not all animation keys were compatible with their target tracks");

		EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
		undo_redo->create_action(TTR("Animation Paste Keys"));
		List<Pair<int, float>> new_selection_values;

		for (int i = 0; i < key_clipboard.keys.size(); i++) {
			const KeyClipboard::Key key = key_clipboard.keys[i];

			float insert_pos = p_ofs_valid ? p_ofs : timeline->get_play_position();

			if (p_ofs_valid) {
				if (snap->is_pressed() && step->get_value() != 0) {
					insert_pos = snap_time(insert_pos);
				}
			}

			float dst_time = key.time + insert_pos;
			int dst_track = key.track + start_track;

			int existing_idx = animation->track_find_key(dst_track, dst_time, Animation::FIND_MODE_APPROX);

			Variant value = key.value;
			bool key_is_bezier = key.track_type == Animation::TYPE_BEZIER;
			bool track_is_bezier = animation->track_get_type(dst_track) == Animation::TYPE_BEZIER;
			if (key_is_bezier && !track_is_bezier) {
				value = AnimationBezierTrackEdit::get_bezier_key_value(value);
			} else if (!key_is_bezier && track_is_bezier) {
				value = AnimationBezierTrackEdit::make_default_bezier_key(value);
			}

			undo_redo->add_do_method(animation.ptr(), "track_insert_key", dst_track, dst_time, value, key.transition);
			undo_redo->add_undo_method(animation.ptr(), "track_remove_key_at_time", dst_track, dst_time);

			Pair<int, float> p;
			p.first = dst_track;
			p.second = dst_time;
			new_selection_values.push_back(p);

			if (existing_idx != -1) {
				undo_redo->add_undo_method(animation.ptr(), "track_insert_key", dst_track, dst_time, animation->track_get_key_value(dst_track, existing_idx), animation->track_get_key_transition(dst_track, existing_idx));
			}
		}

		undo_redo->add_do_method(this, "_clear_selection_for_anim", animation);
		undo_redo->add_undo_method(this, "_clear_selection_for_anim", animation);

		// Reselect pasted.
		for (const Pair<int, float> &E : new_selection_values) {
			undo_redo->add_do_method(this, "_select_at_anim", animation, E.first, E.second);
		}
		for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
			undo_redo->add_undo_method(this, "_select_at_anim", animation, E->key().track, E->get().pos);
		}

		undo_redo->add_do_method(this, "_redraw_tracks");
		undo_redo->add_undo_method(this, "_redraw_tracks");
		undo_redo->commit_action();
	}
}

bool AnimationTrackEditor::_is_track_compatible(int p_target_track_idx, Variant::Type p_source_value_type, Animation::TrackType p_source_track_type) {
	if (animation.is_valid()) {
		Animation::TrackType target_track_type = animation->track_get_type(p_target_track_idx);
		bool track_types_equal = target_track_type == p_source_track_type;
		bool is_source_vector3_type = p_source_track_type == Animation::TYPE_POSITION_3D || p_source_track_type == Animation::TYPE_SCALE_3D || p_source_track_type == Animation::TYPE_ROTATION_3D;
		bool is_source_bezier = p_source_track_type == Animation::TYPE_BEZIER;
		switch (target_track_type) {
			case Animation::TYPE_POSITION_3D:
			case Animation::TYPE_SCALE_3D:
				return p_source_value_type == Variant::VECTOR3;
			case Animation::TYPE_ROTATION_3D:
				return p_source_value_type == Variant::QUATERNION;
			case Animation::TYPE_BEZIER:
				return track_types_equal || p_source_value_type == Variant::FLOAT;
			case Animation::TYPE_VALUE:
				if (track_types_equal || is_source_vector3_type || is_source_bezier) {
					bool path_valid = false;
					Variant::Type property_type = Variant::NIL;

					AnimationPlayerEditor *ape = AnimationPlayerEditor::get_singleton();
					if (ape) {
						AnimationPlayer *ap = ape->get_player();
						if (ap) {
							NodePath npath = animation->track_get_path(p_target_track_idx);
							Node *a_ap_root_node = ap->get_node(ap->get_root_node());
							Node *nd = nullptr;
							// We must test that we have a valid a_ap_root_node before trying to access its content to init the nd Node.
							if (a_ap_root_node) {
								nd = a_ap_root_node->get_node(NodePath(npath.get_concatenated_names()));
							}
							if (nd) {
								StringName prop = npath.get_concatenated_subnames();
								PropertyInfo prop_info;
								path_valid = ClassDB::get_property_info(nd->get_class(), prop, &prop_info);
								property_type = prop_info.type;
							}
						}
					}

					if (path_valid) {
						if (is_source_bezier)
							p_source_value_type = Variant::FLOAT;
						return property_type == p_source_value_type;
					} else {
						if (animation->track_get_key_count(p_target_track_idx) > 0) {
							Variant::Type first_key_type = animation->track_get_key_value(p_target_track_idx, 0).get_type();
							return first_key_type == p_source_value_type;
						}
						return true; // Type is Undefined.
					}
				}
				return false;
			default: // Works for TYPE_ANIMATION; TYPE_AUDIO; TYPE_CALL_METHOD; BLEND_SHAPE.
				return track_types_equal;
		}
	}
	return false;
}

void AnimationTrackEditor::_edit_menu_about_to_popup() {
	AnimationPlayer *player = AnimationPlayerEditor::get_singleton()->get_player();
	edit->get_popup()->set_item_disabled(edit->get_popup()->get_item_index(EDIT_APPLY_RESET), !player->can_apply_reset());

	bool has_length = false;
	for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
		if (animation->track_get_type(E.key.track) == Animation::TYPE_AUDIO && animation->audio_track_get_key_stream(E.key.track, E.key.key).is_valid()) {
			has_length = true;
			break;
		}
	}
	edit->get_popup()->set_item_disabled(edit->get_popup()->get_item_index(EDIT_SET_START_OFFSET), !has_length);
	edit->get_popup()->set_item_disabled(edit->get_popup()->get_item_index(EDIT_SET_END_OFFSET), !has_length);
}

void AnimationTrackEditor::goto_prev_step(bool p_from_mouse_event) {
	if (animation.is_null()) {
		return;
	}
	float anim_step = animation->get_step();
	if (anim_step == 0) {
		anim_step = 1;
	}
	if (p_from_mouse_event && Input::get_singleton()->is_key_pressed(Key::SHIFT)) {
		// Use more precise snapping when holding Shift.
		// This is used when scrobbling the timeline using Alt + Mouse wheel.
		anim_step *= 0.25;
	}

	float pos = timeline->get_play_position();
	pos = Math::snapped(pos - anim_step, anim_step);
	if (pos < 0) {
		pos = 0;
	}
	set_anim_pos(pos);
	emit_signal(SNAME("timeline_changed"), pos, false);
}

void AnimationTrackEditor::goto_next_step(bool p_from_mouse_event, bool p_timeline_only) {
	if (animation.is_null()) {
		return;
	}
	float anim_step = animation->get_step();
	if (anim_step == 0) {
		anim_step = 1;
	}
	if (p_from_mouse_event && Input::get_singleton()->is_key_pressed(Key::SHIFT)) {
		// Use more precise snapping when holding Shift.
		// This is used when scrobbling the timeline using Alt + Mouse wheel.
		// Do not use precise snapping when using the menu action or keyboard shortcut,
		// as the default keyboard shortcut requires pressing Shift.
		anim_step *= 0.25;
	}

	float pos = timeline->get_play_position();

	pos = Math::snapped(pos + anim_step, anim_step);
	if (pos > animation->get_length()) {
		pos = animation->get_length();
	}
	set_anim_pos(pos);

	emit_signal(SNAME("timeline_changed"), pos, p_timeline_only);
}

void AnimationTrackEditor::_edit_menu_pressed(int p_option) {
	last_menu_track_opt = p_option;
	switch (p_option) {
		case EDIT_COPY_TRACKS: {
			track_copy_select->clear();
			TreeItem *troot = track_copy_select->create_item();

			for (int i = 0; i < animation->get_track_count(); i++) {
				NodePath path = animation->track_get_path(i);
				Node *node = nullptr;

				if (root) {
					node = root->get_node_or_null(path);
				}

				String text;
				Ref<Texture2D> icon = get_editor_theme_icon(SNAME("Node"));
				if (node) {
					if (has_theme_icon(node->get_class(), EditorStringName(EditorIcons))) {
						icon = get_editor_theme_icon(node->get_class());
					}

					text = node->get_name();
					Vector<StringName> sn = path.get_subnames();
					for (int j = 0; j < sn.size(); j++) {
						text += ".";
						text += sn[j];
					}

					path = NodePath(node->get_path().get_names(), path.get_subnames(), true); // Store full path instead for copying.
				} else {
					text = path;
					int sep = text.find(":");
					if (sep != -1) {
						text = text.substr(sep + 1, text.length());
					}
				}

				String track_type;
				switch (animation->track_get_type(i)) {
					case Animation::TYPE_POSITION_3D:
						track_type = TTR("Position");
						break;
					case Animation::TYPE_ROTATION_3D:
						track_type = TTR("Rotation");
						break;
					case Animation::TYPE_SCALE_3D:
						track_type = TTR("Scale");
						break;
					case Animation::TYPE_BLEND_SHAPE:
						track_type = TTR("BlendShape");
						break;
					case Animation::TYPE_METHOD:
						track_type = TTR("Methods");
						break;
					case Animation::TYPE_BEZIER:
						track_type = TTR("Bezier");
						break;
					case Animation::TYPE_AUDIO:
						track_type = TTR("Audio");
						break;
					default: {
					};
				}
				if (!track_type.is_empty()) {
					text += vformat(" (%s)", track_type);
				}

				TreeItem *it = track_copy_select->create_item(troot);
				it->set_editable(0, true);
				it->set_selectable(0, true);
				it->set_cell_mode(0, TreeItem::CELL_MODE_CHECK);
				it->set_icon(0, icon);
				it->set_text(0, text);
				Dictionary md;
				md["track_idx"] = i;
				md["path"] = path;
				it->set_metadata(0, md);
			}

			track_copy_dialog->popup_centered(Size2(350, 500) * EDSCALE);
		} break;
		case EDIT_COPY_TRACKS_CONFIRM: {
			track_clipboard.clear();
			TreeItem *tree_root = track_copy_select->get_root();
			if (tree_root) {
				TreeItem *it = tree_root->get_first_child();
				while (it) {
					Dictionary md = it->get_metadata(0);
					int idx = md["track_idx"];
					if (it->is_checked(0) && idx >= 0 && idx < animation->get_track_count()) {
						TrackClipboard tc;
						tc.base_path = animation->track_get_path(idx);
						tc.full_path = md["path"];
						tc.track_type = animation->track_get_type(idx);
						tc.interp_type = animation->track_get_interpolation_type(idx);
						if (tc.track_type == Animation::TYPE_VALUE) {
							tc.update_mode = animation->value_track_get_update_mode(idx);
						}
						if (tc.track_type == Animation::TYPE_AUDIO) {
							tc.use_blend = animation->audio_track_is_use_blend(idx);
						}
						tc.loop_wrap = animation->track_get_interpolation_loop_wrap(idx);
						tc.enabled = animation->track_is_enabled(idx);
						for (int i = 0; i < animation->track_get_key_count(idx); i++) {
							TrackClipboard::Key k;
							k.time = animation->track_get_key_time(idx, i);
							k.value = animation->track_get_key_value(idx, i);
							k.transition = animation->track_get_key_transition(idx, i);
							tc.keys.push_back(k);
						}
						track_clipboard.push_back(tc);
					}
					it = it->get_next();
				}
			}
		} break;
		case EDIT_PASTE_TRACKS: {
			if (track_clipboard.size() == 0) {
				EditorNode::get_singleton()->show_warning(TTR("Clipboard is empty!"));
				break;
			}

			int base_track = animation->get_track_count();
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Paste Tracks"));
			for (int i = 0; i < track_clipboard.size(); i++) {
				undo_redo->add_do_method(animation.ptr(), "add_track", track_clipboard[i].track_type);
				Node *exists = nullptr;
				NodePath path = track_clipboard[i].base_path;

				if (root) {
					NodePath np = track_clipboard[i].full_path;
					exists = root->get_node_or_null(np);
					if (exists) {
						path = NodePath(root->get_path_to(exists).get_names(), track_clipboard[i].full_path.get_subnames(), false);
					}
				}

				undo_redo->add_do_method(animation.ptr(), "track_set_path", base_track, path);
				undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_type", base_track, track_clipboard[i].interp_type);
				undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_loop_wrap", base_track, track_clipboard[i].loop_wrap);
				undo_redo->add_do_method(animation.ptr(), "track_set_enabled", base_track, track_clipboard[i].enabled);
				if (track_clipboard[i].track_type == Animation::TYPE_VALUE) {
					undo_redo->add_do_method(animation.ptr(), "value_track_set_update_mode", base_track, track_clipboard[i].update_mode);
				}
				if (track_clipboard[i].track_type == Animation::TYPE_AUDIO) {
					undo_redo->add_do_method(animation.ptr(), "audio_track_set_use_blend", base_track, track_clipboard[i].use_blend);
				}

				for (int j = 0; j < track_clipboard[i].keys.size(); j++) {
					undo_redo->add_do_method(animation.ptr(), "track_insert_key", base_track, track_clipboard[i].keys[j].time, track_clipboard[i].keys[j].value, track_clipboard[i].keys[j].transition);
				}

				undo_redo->add_undo_method(animation.ptr(), "remove_track", animation->get_track_count());

				base_track++;
			}

			undo_redo->commit_action();
		} break;

		case EDIT_SCALE_SELECTION:
		case EDIT_SCALE_FROM_CURSOR: {
			scale_dialog->popup_centered(Size2(200, 100) * EDSCALE);
		} break;
		case EDIT_SCALE_CONFIRM: {
			if (selection.is_empty()) {
				return;
			}

			float from_t = 1e20;
			float to_t = -1e20;
			float len = -1e20;
			float pivot = 0;

			for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
				float t = animation->track_get_key_time(E.key.track, E.key.key);
				if (t < from_t) {
					from_t = t;
				}
				if (t > to_t) {
					to_t = t;
				}
			}

			len = to_t - from_t;
			if (last_menu_track_opt == EDIT_SCALE_FROM_CURSOR) {
				pivot = timeline->get_play_position();

			} else {
				pivot = from_t;
			}

			float s = scale->get_value();
			ERR_FAIL_COND_MSG(s == 0, "Can't scale to 0.");

			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Animation Scale Keys"));

			List<_AnimMoveRestore> to_restore;

			// 1 - Remove the keys.
			for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
				undo_redo->add_do_method(animation.ptr(), "track_remove_key", E->key().track, E->key().key);
			}
			// 2 - Remove overlapped keys.
			for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
				float newtime = (E->get().pos - from_t) * s + from_t;
				int idx = animation->track_find_key(E->key().track, newtime, Animation::FIND_MODE_APPROX);
				if (idx == -1) {
					continue;
				}
				SelectedKey sk;
				sk.key = idx;
				sk.track = E->key().track;
				if (selection.has(sk)) {
					continue; // Already in selection, don't save.
				}

				undo_redo->add_do_method(animation.ptr(), "track_remove_key_at_time", E->key().track, newtime);
				_AnimMoveRestore amr;

				amr.key = animation->track_get_key_value(E->key().track, idx);
				amr.track = E->key().track;
				amr.time = newtime;
				amr.transition = animation->track_get_key_transition(E->key().track, idx);

				to_restore.push_back(amr);
			}

#define NEW_POS(m_ofs) (((s > 0) ? m_ofs : from_t + (len - (m_ofs - from_t))) - pivot) * ABS(s) + from_t
			// 3 - Move the keys (re insert them).
			for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
				float newpos = NEW_POS(E->get().pos);
				undo_redo->add_do_method(animation.ptr(), "track_insert_key", E->key().track, newpos, animation->track_get_key_value(E->key().track, E->key().key), animation->track_get_key_transition(E->key().track, E->key().key));
			}

			// 4 - (Undo) Remove inserted keys.
			for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
				float newpos = NEW_POS(E->get().pos);
				undo_redo->add_undo_method(animation.ptr(), "track_remove_key_at_time", E->key().track, newpos);
			}

			// 5 - (Undo) Reinsert keys.
			for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
				undo_redo->add_undo_method(animation.ptr(), "track_insert_key", E->key().track, E->get().pos, animation->track_get_key_value(E->key().track, E->key().key), animation->track_get_key_transition(E->key().track, E->key().key));
			}

			// 6 - (Undo) Reinsert overlapped keys.
			for (_AnimMoveRestore &amr : to_restore) {
				undo_redo->add_undo_method(animation.ptr(), "track_insert_key", amr.track, amr.time, amr.key, amr.transition);
			}

			undo_redo->add_do_method(this, "_clear_selection_for_anim", animation);
			undo_redo->add_undo_method(this, "_clear_selection_for_anim", animation);

			// 7-reselect.
			for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
				float oldpos = E->get().pos;
				float newpos = NEW_POS(oldpos);
				if (newpos >= 0) {
					undo_redo->add_do_method(this, "_select_at_anim", animation, E->key().track, newpos);
				}
				undo_redo->add_undo_method(this, "_select_at_anim", animation, E->key().track, oldpos);
			}
#undef NEW_POS

			undo_redo->add_do_method(this, "_redraw_tracks");
			undo_redo->add_undo_method(this, "_redraw_tracks");
			undo_redo->commit_action();
		} break;

		case EDIT_SET_START_OFFSET: {
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Animation Set Start Offset"), UndoRedo::MERGE_ENDS);
			for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
				if (animation->track_get_type(E.key.track) != Animation::TYPE_AUDIO) {
					continue;
				}
				Ref<AudioStream> stream = animation->audio_track_get_key_stream(E.key.track, E.key.key);
				if (stream.is_null()) {
					continue;
				}
				double len = stream->get_length() - animation->audio_track_get_key_end_offset(E.key.track, E.key.key);
				real_t prev_offset = animation->audio_track_get_key_start_offset(E.key.track, E.key.key);
				double prev_time = animation->track_get_key_time(E.key.track, E.key.key);
				float cur_time = timeline->get_play_position();
				float diff = prev_offset + cur_time - prev_time;
				float destination = cur_time - MIN(0, diff);
				if (diff >= len || animation->track_find_key(E.key.track, destination, Animation::FIND_MODE_EXACT) >= 0) {
					continue;
				}
				undo_redo->add_do_method(animation.ptr(), "audio_track_set_key_start_offset", E.key.track, E.key.key, diff);
				undo_redo->add_do_method(animation.ptr(), "track_set_key_time", E.key.track, E.key.key, destination);
				undo_redo->add_undo_method(animation.ptr(), "track_set_key_time", E.key.track, E.key.key, prev_time);
				undo_redo->add_undo_method(animation.ptr(), "audio_track_set_key_start_offset", E.key.track, E.key.key, prev_offset);
			}
			undo_redo->add_do_method(this, "_clear_selection_for_anim", animation);
			undo_redo->add_undo_method(this, "_clear_selection_for_anim", animation);
			undo_redo->commit_action();
		} break;
		case EDIT_SET_END_OFFSET: {
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Animation Set End Offset"), UndoRedo::MERGE_ENDS);
			for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
				if (animation->track_get_type(E.key.track) != Animation::TYPE_AUDIO) {
					continue;
				}
				Ref<AudioStream> stream = animation->audio_track_get_key_stream(E.key.track, E.key.key);
				if (stream.is_null()) {
					continue;
				}
				double len = stream->get_length() - animation->audio_track_get_key_start_offset(E.key.track, E.key.key);
				real_t prev_offset = animation->audio_track_get_key_end_offset(E.key.track, E.key.key);
				double prev_time = animation->track_get_key_time(E.key.track, E.key.key);
				float cur_time = timeline->get_play_position();
				float diff = prev_time + len - cur_time;
				if (diff >= len) {
					continue;
				}
				undo_redo->add_do_method(animation.ptr(), "audio_track_set_key_end_offset", E.key.track, E.key.key, diff);
				undo_redo->add_undo_method(animation.ptr(), "audio_track_set_key_end_offset", E.key.track, E.key.key, prev_offset);
			}
			undo_redo->add_do_method(this, "_clear_selection_for_anim", animation);
			undo_redo->add_undo_method(this, "_clear_selection_for_anim", animation);
			undo_redo->commit_action();
		} break;

		case EDIT_EASE_SELECTION: {
			ease_dialog->popup_centered(Size2(200, 100) * EDSCALE);
		} break;
		case EDIT_EASE_CONFIRM: {
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Make Easing Keys"));

			Tween::TransitionType transition_type = static_cast<Tween::TransitionType>(transition_selection->get_selected_id());
			Tween::EaseType ease_type = static_cast<Tween::EaseType>(ease_selection->get_selected_id());
			float fps = ease_fps->get_value();
			double dur_step = 1.0 / fps;

			// Organize track and key.
			HashMap<int, Vector<int>> keymap;
			Vector<int> tracks;
			for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
				if (!tracks.has(E.key.track)) {
					tracks.append(E.key.track);
				}
			}
			for (int i = 0; i < tracks.size(); i++) {
				switch (animation->track_get_type(tracks[i])) {
					case Animation::TYPE_VALUE:
					case Animation::TYPE_POSITION_3D:
					case Animation::TYPE_ROTATION_3D:
					case Animation::TYPE_SCALE_3D:
					case Animation::TYPE_BLEND_SHAPE: {
						Vector<int> keys;
						for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
							if (E.key.track == tracks[i]) {
								keys.append(E.key.key);
							}
						}
						keys.sort();
						keymap.insert(tracks[i], keys);
					} break;
					default: {
					} break;
				}
			}

			// Make easing.
			HashMap<int, Vector<int>>::Iterator E = keymap.begin();
			while (E) {
				int track = E->key;
				Vector<int> keys = E->value;
				int len = keys.size() - 1;

				// Special case for angle interpolation.
				bool is_using_angle = animation->track_get_interpolation_type(track) == Animation::INTERPOLATION_LINEAR_ANGLE || animation->track_get_interpolation_type(track) == Animation::INTERPOLATION_CUBIC_ANGLE;

				// Make insert queue.
				Vector<Pair<real_t, Variant>> insert_queue_new;
				for (int i = 0; i < len; i++) {
					// Check neighboring keys.
					if (keys[i] + 1 == keys[i + 1]) {
						double from_t = animation->track_get_key_time(track, keys[i]);
						double to_t = animation->track_get_key_time(track, keys[i + 1]);
						Variant from_v = animation->track_get_key_value(track, keys[i]);
						Variant to_v = animation->track_get_key_value(track, keys[i + 1]);
						if (is_using_angle) {
							real_t a = from_v;
							real_t b = to_v;
							real_t to_diff = fmod(b - a, Math_TAU);
							to_v = a + fmod(2.0 * to_diff, Math_TAU) - to_diff;
						}
						Variant delta_v = Animation::subtract_variant(to_v, from_v);
						double duration = to_t - from_t;
						double fixed_duration = duration - UNIT_EPSILON; // Prevent to overwrap keys...
						for (double delta_t = dur_step; delta_t < fixed_duration; delta_t += dur_step) {
							Pair<real_t, Variant> keydata;
							keydata.first = from_t + delta_t;
							keydata.second = Tween::interpolate_variant(from_v, delta_v, delta_t, duration, transition_type, ease_type);
							insert_queue_new.append(keydata);
						}
					}
				}

				// Do insertion.
				for (int i = 0; i < insert_queue_new.size(); i++) {
					undo_redo->add_do_method(animation.ptr(), "track_insert_key", track, insert_queue_new[i].first, insert_queue_new[i].second);
					undo_redo->add_undo_method(animation.ptr(), "track_remove_key_at_time", track, insert_queue_new[i].first);
				}

				++E;
			}

			undo_redo->add_do_method(this, "_clear_selection_for_anim", animation);
			undo_redo->add_undo_method(this, "_clear_selection_for_anim", animation);
			undo_redo->add_do_method(this, "_redraw_tracks");
			undo_redo->add_undo_method(this, "_redraw_tracks");
			undo_redo->commit_action();
			_update_key_edit();

		} break;

		case EDIT_DUPLICATE_SELECTED_KEYS: {
			if (bezier_edit->is_visible()) {
				bezier_edit->duplicate_selected_keys(-1.0, false);
				break;
			}
			_anim_duplicate_keys(-1.0, false, -1.0);
		} break;
		case EDIT_CUT_KEYS: {
			if (bezier_edit->is_visible()) {
				bezier_edit->copy_selected_keys(true);
				break;
			}
			_anim_copy_keys(true);
		} break;
		case EDIT_COPY_KEYS: {
			if (bezier_edit->is_visible()) {
				bezier_edit->copy_selected_keys(false);
				break;
			}
			_anim_copy_keys(false);
		} break;
		case EDIT_PASTE_KEYS: {
			_anim_paste_keys(-1.0, false, -1.0);
		} break;
		case EDIT_MOVE_FIRST_SELECTED_KEY_TO_CURSOR: {
			if (moving_selection || selection.is_empty()) {
				break;
			}
			real_t from_t = 1e20;
			for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
				real_t t = animation->track_get_key_time(E.key.track, E.key.key);
				if (t < from_t) {
					from_t = t;
				}
			}
			_move_selection_begin();
			_move_selection(timeline->get_play_position() - from_t);
			_move_selection_commit();
		} break;
		case EDIT_MOVE_LAST_SELECTED_KEY_TO_CURSOR: {
			if (moving_selection || selection.is_empty()) {
				break;
			}
			real_t to_t = -1e20;
			for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
				real_t t = animation->track_get_key_time(E.key.track, E.key.key);
				if (t > to_t) {
					to_t = t;
				}
			}
			_move_selection_begin();
			_move_selection(timeline->get_play_position() - to_t);
			_move_selection_commit();
		} break;
		case EDIT_ADD_RESET_KEY: {
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Animation Add RESET Keys"));

			Ref<Animation> reset = _create_and_get_reset_animation();
			int reset_tracks = reset->get_track_count();
			HashSet<int> tracks_added;

			for (const KeyValue<SelectedKey, KeyInfo> &E : selection) {
				const SelectedKey &sk = E.key;

				const Animation::TrackType track_type = animation->track_get_type(E.key.track);
				if (track_type == Animation::TYPE_ANIMATION || track_type == Animation::TYPE_AUDIO || track_type == Animation::TYPE_METHOD) {
					continue;
				}

				// Only add one key per track.
				if (tracks_added.has(sk.track)) {
					continue;
				}
				tracks_added.insert(sk.track);

				int dst_track = -1;

				const NodePath &path = animation->track_get_path(sk.track);
				for (int i = 0; i < reset->get_track_count(); i++) {
					if (reset->track_get_path(i) == path) {
						dst_track = i;
						break;
					}
				}

				int existing_idx = -1;
				if (dst_track == -1) {
					// If adding multiple tracks, make sure that correct track is referenced.
					dst_track = reset_tracks;
					reset_tracks++;

					undo_redo->add_do_method(reset.ptr(), "add_track", animation->track_get_type(sk.track));
					undo_redo->add_do_method(reset.ptr(), "track_set_path", dst_track, path);
					undo_redo->add_undo_method(reset.ptr(), "remove_track", dst_track);
				} else {
					existing_idx = reset->track_find_key(dst_track, 0, Animation::FIND_MODE_APPROX);
				}

				if (animation->track_get_type(sk.track) == Animation::TYPE_VALUE) {
					undo_redo->add_do_method(reset.ptr(), "value_track_set_update_mode", dst_track, animation->value_track_get_update_mode(sk.track));
				}
				if (animation->track_get_type(sk.track) == Animation::TYPE_AUDIO) {
					undo_redo->add_do_method(reset.ptr(), "audio_track_set_use_blend", dst_track, animation->audio_track_is_use_blend(sk.track));
				}
				undo_redo->add_do_method(reset.ptr(), "track_set_interpolation_type", dst_track, animation->track_get_interpolation_type(sk.track));
				undo_redo->add_do_method(reset.ptr(), "track_set_interpolation_loop_wrap", dst_track, animation->track_get_interpolation_loop_wrap(sk.track));

				undo_redo->add_do_method(reset.ptr(), "track_insert_key", dst_track, 0, animation->track_get_key_value(sk.track, sk.key), animation->track_get_key_transition(sk.track, sk.key));
				undo_redo->add_undo_method(reset.ptr(), "track_remove_key_at_time", dst_track, 0);

				if (existing_idx != -1) {
					undo_redo->add_undo_method(reset.ptr(), "track_insert_key", dst_track, 0, reset->track_get_key_value(dst_track, existing_idx), reset->track_get_key_transition(dst_track, existing_idx));
				}
			}

			undo_redo->add_do_method(this, "_clear_selection_for_anim", animation);
			undo_redo->add_undo_method(this, "_clear_selection_for_anim", animation);
			undo_redo->add_do_method(this, "_redraw_tracks");
			undo_redo->add_undo_method(this, "_redraw_tracks");
			undo_redo->commit_action();

		} break;
		case EDIT_DELETE_SELECTION: {
			if (bezier_edit->is_visible()) {
				bezier_edit->delete_selection();
				break;
			}

			if (selection.size()) {
				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
				undo_redo->create_action(TTR("Animation Delete Keys"));

				for (RBMap<SelectedKey, KeyInfo>::Element *E = selection.back(); E; E = E->prev()) {
					undo_redo->add_do_method(animation.ptr(), "track_remove_key", E->key().track, E->key().key);
					undo_redo->add_undo_method(animation.ptr(), "track_insert_key", E->key().track, E->get().pos, animation->track_get_key_value(E->key().track, E->key().key), animation->track_get_key_transition(E->key().track, E->key().key));
				}
				undo_redo->add_do_method(this, "_clear_selection_for_anim", animation);
				undo_redo->add_undo_method(this, "_clear_selection_for_anim", animation);
				undo_redo->add_do_method(this, "_redraw_tracks");
				undo_redo->add_undo_method(this, "_redraw_tracks");
				undo_redo->commit_action();
				_update_key_edit();
			}
		} break;
		case EDIT_GOTO_NEXT_STEP_TIMELINE_ONLY:
		case EDIT_GOTO_NEXT_STEP: {
			goto_next_step(false, p_option == EDIT_GOTO_NEXT_STEP_TIMELINE_ONLY);
		} break;
		case EDIT_GOTO_PREV_STEP: {
			goto_prev_step(false);
		} break;

		case EDIT_APPLY_RESET: {
			AnimationPlayerEditor::get_singleton()->get_player()->apply_reset(true);
		} break;

		case EDIT_BAKE_ANIMATION: {
			bake_dialog->popup_centered(Size2(200, 100) * EDSCALE);
		} break;
		case EDIT_BAKE_ANIMATION_CONFIRM: {
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->create_action(TTR("Bake Animation as Linear Keys"));

			int track_len = animation->get_track_count();
			bool b_trs = bake_trs->is_pressed();
			bool b_bs = bake_blendshape->is_pressed();
			bool b_v = bake_value->is_pressed();

			double anim_len = animation->get_length() + CMP_EPSILON; // For end key.
			float fps = bake_fps->get_value();
			double dur_step = 1.0 / fps;

			for (int i = 0; i < track_len; i++) {
				bool do_bake = false;
				Animation::TrackType type = animation->track_get_type(i);
				do_bake |= b_trs && (type == Animation::TYPE_POSITION_3D || type == Animation::TYPE_ROTATION_3D || type == Animation::TYPE_SCALE_3D);
				do_bake |= b_bs && type == Animation::TYPE_BLEND_SHAPE;
				do_bake |= b_v && type == Animation::TYPE_VALUE;
				if (do_bake && !animation->track_is_compressed(i)) {
					Animation::InterpolationType it = animation->track_get_interpolation_type(i);
					if (it == Animation::INTERPOLATION_NEAREST) {
						continue; // Nearest interpolation cannot be baked.
					}

					// Special case for angle interpolation.
					bool is_using_angle = it == Animation::INTERPOLATION_LINEAR_ANGLE || it == Animation::INTERPOLATION_CUBIC_ANGLE;

					// Make insert queue.
					Vector<Pair<real_t, Variant>> insert_queue_new;

					switch (type) {
						case Animation::TYPE_POSITION_3D: {
							for (double delta_t = 0.0; delta_t <= anim_len; delta_t += dur_step) {
								Pair<real_t, Variant> keydata;
								keydata.first = delta_t;
								Vector3 v;
								animation->try_position_track_interpolate(i, delta_t, &v);
								keydata.second = v;
								insert_queue_new.append(keydata);
							}
						} break;
						case Animation::TYPE_ROTATION_3D: {
							for (double delta_t = 0.0; delta_t <= anim_len; delta_t += dur_step) {
								Pair<real_t, Variant> keydata;
								keydata.first = delta_t;
								Quaternion v;
								animation->try_rotation_track_interpolate(i, delta_t, &v);
								keydata.second = v;
								insert_queue_new.append(keydata);
							}
						} break;
						case Animation::TYPE_SCALE_3D: {
							for (double delta_t = 0.0; delta_t <= anim_len; delta_t += dur_step) {
								Pair<real_t, Variant> keydata;
								keydata.first = delta_t;
								Vector3 v;
								animation->try_scale_track_interpolate(i, delta_t, &v);
								keydata.second = v;
								insert_queue_new.append(keydata);
							}
						} break;
						case Animation::TYPE_BLEND_SHAPE: {
							for (double delta_t = 0.0; delta_t <= anim_len; delta_t += dur_step) {
								Pair<real_t, Variant> keydata;
								keydata.first = delta_t;
								float v;
								animation->try_blend_shape_track_interpolate(i, delta_t, &v);
								keydata.second = v;
								insert_queue_new.append(keydata);
							}
						} break;
						case Animation::TYPE_VALUE: {
							for (double delta_t = 0.0; delta_t < anim_len; delta_t += dur_step) {
								Pair<real_t, Variant> keydata;
								keydata.first = delta_t;
								keydata.second = animation->value_track_interpolate(i, delta_t);
								insert_queue_new.append(keydata);
							}
						} break;
						default: {
						} break;
					}

					// Cleanup keys.
					int key_len = animation->track_get_key_count(i);
					for (int j = key_len - 1; j >= 0; j--) {
						undo_redo->add_do_method(animation.ptr(), "track_remove_key", i, j);
					}

					// Insert keys.
					undo_redo->add_do_method(animation.ptr(), "track_set_interpolation_type", i, is_using_angle ? Animation::INTERPOLATION_LINEAR_ANGLE : Animation::INTERPOLATION_LINEAR);
					for (int j = insert_queue_new.size() - 1; j >= 0; j--) {
						undo_redo->add_do_method(animation.ptr(), "track_insert_key", i, insert_queue_new[j].first, insert_queue_new[j].second);
						undo_redo->add_undo_method(animation.ptr(), "track_remove_key_at_time", i, insert_queue_new[j].first);
					}

					// Undo methods.
					undo_redo->add_undo_method(animation.ptr(), "track_set_interpolation_type", i, animation->track_get_interpolation_type(i));
					for (int j = key_len - 1; j >= 0; j--) {
						undo_redo->add_undo_method(animation.ptr(), "track_insert_key", i, animation->track_get_key_time(i, j), animation->track_get_key_value(i, j), animation->track_get_key_transition(i, j));
					}
				}
			}

			undo_redo->add_do_method(this, "_clear_selection_for_anim", animation);
			undo_redo->add_undo_method(this, "_clear_selection_for_anim", animation);
			undo_redo->add_do_method(this, "_redraw_tracks");
			undo_redo->add_undo_method(this, "_redraw_tracks");
			undo_redo->commit_action();
			_update_key_edit();

		} break;

		case EDIT_OPTIMIZE_ANIMATION: {
			optimize_dialog->popup_centered(Size2(250, 180) * EDSCALE);

		} break;
		case EDIT_OPTIMIZE_ANIMATION_CONFIRM: {
			animation->optimize(optimize_velocity_error->get_value(), optimize_angular_error->get_value(), optimize_precision_error->get_value());
			_redraw_tracks();
			_update_key_edit();
			EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
			undo_redo->clear_history(true, undo_redo->get_history_id_for_object(animation.ptr()));
			undo_redo->clear_history(true, undo_redo->get_history_id_for_object(this));

		} break;
		case EDIT_CLEAN_UP_ANIMATION: {
			cleanup_dialog->popup_centered(Size2(300, 0) * EDSCALE);

		} break;
		case EDIT_CLEAN_UP_ANIMATION_CONFIRM: {
			if (cleanup_all->is_pressed()) {
				List<StringName> names;
				AnimationPlayerEditor::get_singleton()->get_player()->get_animation_list(&names);
				for (const StringName &E : names) {
					_cleanup_animation(AnimationPlayerEditor::get_singleton()->get_player()->get_animation(E));
				}
			} else {
				_cleanup_animation(animation);
			}

		} break;
	}
}

void AnimationTrackEditor::_cleanup_animation(Ref<Animation> p_animation) {
	_clear_selection();
	for (int i = 0; i < p_animation->get_track_count(); i++) {
		if (!root->has_node_and_resource(p_animation->track_get_path(i))) {
			continue;
		}
		Ref<Resource> res;
		Vector<StringName> leftover_path;
		Node *node = root->get_node_and_resource(p_animation->track_get_path(i), res, leftover_path);

		bool prop_exists = false;
		Variant::Type valid_type = Variant::NIL;
		Object *obj = nullptr;

		if (res.is_valid()) {
			obj = res.ptr();
		} else if (node) {
			obj = node;
		}

		if (obj && p_animation->track_get_type(i) == Animation::TYPE_VALUE) {
			valid_type = obj->get_static_property_type_indexed(leftover_path, &prop_exists);
		}

		if (!obj && cleanup_tracks->is_pressed()) {
			p_animation->remove_track(i);
			i--;
			continue;
		}

		if (cleanup_keys_with_trimming_head->is_pressed()) {
			// Check is necessary because if there is already a key in position 0, it should not be replaced.
			if (p_animation->track_get_type(i) == Animation::TYPE_AUDIO && p_animation->track_find_key(i, 0, Animation::FIND_MODE_EXACT) < 0) {
				for (int j = 0; j < p_animation->track_get_key_count(i); j++) {
					double t = p_animation->track_get_key_time(i, j);
					if (t < 0) {
						if (j == p_animation->track_get_key_count(i) - 1 || (j + 1 < p_animation->track_get_key_count(i) && p_animation->track_get_key_time(i, j + 1) > 0)) {
							Ref<AudioStream> stream = p_animation->audio_track_get_key_stream(i, j);
							double len = stream->get_length() - p_animation->audio_track_get_key_end_offset(i, j);
							double prev_offset = p_animation->audio_track_get_key_start_offset(i, j);
							double prev_time = p_animation->track_get_key_time(i, j);
							double diff = prev_offset - prev_time;
							if (diff >= len) {
								p_animation->track_remove_key(i, j);
								j--;
								continue;
							}
							p_animation->audio_track_set_key_start_offset(i, j, diff);
							p_animation->track_set_key_time(i, j, 0);
						} else {
							p_animation->track_remove_key(i, j);
							j--;
						}
					}
				}
			} else {
				for (int j = 0; j < p_animation->track_get_key_count(i); j++) {
					double t = p_animation->track_get_key_time(i, j);
					if (t < 0) {
						p_animation->track_remove_key(i, j);
						j--;
					}
				}
			}
		}

		if (cleanup_keys_with_trimming_end->is_pressed()) {
			if (p_animation->track_get_type(i) == Animation::TYPE_AUDIO) {
				for (int j = 0; j < p_animation->track_get_key_count(i); j++) {
					double t = p_animation->track_get_key_time(i, j);
					if (t <= p_animation->get_length() && (j == p_animation->track_get_key_count(i) - 1 || (j + 1 < p_animation->track_get_key_count(i) && p_animation->track_get_key_time(i, j + 1) > p_animation->get_length()))) {
						Ref<AudioStream> stream = animation->audio_track_get_key_stream(i, j);
						double len = stream->get_length() - animation->audio_track_get_key_start_offset(i, j);
						if (t + len < p_animation->get_length()) {
							continue;
						}
						double prev_time = animation->track_get_key_time(i, j);
						double diff = prev_time + len - p_animation->get_length();
						if (diff >= len) {
							p_animation->track_remove_key(i, j);
							j--;
							continue;
						}
						p_animation->audio_track_set_key_end_offset(i, j, diff);
					} else if (t > p_animation->get_length()) {
						p_animation->track_remove_key(i, j);
						j--;
					}
				}
			} else {
				for (int j = 0; j < p_animation->track_get_key_count(i); j++) {
					double t = p_animation->track_get_key_time(i, j);
					if (t > p_animation->get_length()) {
						p_animation->track_remove_key(i, j);
						j--;
					}
				}
			}
		}

		if (!prop_exists || p_animation->track_get_type(i) != Animation::TYPE_VALUE || !cleanup_keys->is_pressed()) {
			continue;
		}

		for (int j = 0; j < p_animation->track_get_key_count(i); j++) {
			Variant v = p_animation->track_get_key_value(i, j);

			if (!Variant::can_convert(v.get_type(), valid_type)) {
				p_animation->track_remove_key(i, j);
				j--;
			}
		}

		if (p_animation->track_get_key_count(i) == 0 && cleanup_tracks->is_pressed()) {
			p_animation->remove_track(i);
			i--;
		}
	}

	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->clear_history(true, undo_redo->get_history_id_for_object(animation.ptr()));
	undo_redo->clear_history(true, undo_redo->get_history_id_for_object(this));
	_update_tracks();
}

void AnimationTrackEditor::_view_group_toggle() {
	_update_tracks();
	view_group->set_icon(get_editor_theme_icon(view_group->is_pressed() ? SNAME("AnimationTrackList") : SNAME("AnimationTrackGroup")));
	bezier_edit->set_filtered(selected_filter->is_pressed());
}

bool AnimationTrackEditor::is_grouping_tracks() {
	if (!view_group) {
		return false;
	}

	return !view_group->is_pressed();
}

void AnimationTrackEditor::_auto_fit() {
	timeline->auto_fit();
}

void AnimationTrackEditor::_auto_fit_bezier() {
	timeline->auto_fit();

	if (bezier_edit->is_visible()) {
		bezier_edit->auto_fit_vertically();
	}
}

void AnimationTrackEditor::_selection_changed() {
	if (selected_filter->is_pressed()) {
		_update_tracks(); // Needs updating.
	} else {
		_redraw_tracks();
		_redraw_groups();
	}
}

void AnimationTrackEditor::_update_snap_unit() {
	if (step->get_value() <= 0) {
		snap_unit = 0;
		return; // Avoid zero div.
	}

	if (timeline->is_using_fps()) {
		snap_unit = 1.0 / step->get_value();
	} else {
		snap_unit = 1.0 / Math::round(1.0 / step->get_value()); // Follow the snap behavior of the timeline editor.
	}
}

float AnimationTrackEditor::snap_time(float p_value, bool p_relative) {
	if (is_snap_enabled()) {
		if (Input::get_singleton()->is_key_pressed(Key::SHIFT)) {
			// Use more precise snapping when holding Shift.
			snap_unit *= 0.25;
		}

		if (p_relative) {
			double rel = Math::fmod(timeline->get_value(), snap_unit);
			p_value = Math::snapped(p_value + rel, snap_unit) - rel;
		} else {
			p_value = Math::snapped(p_value, snap_unit);
		}
	}

	return p_value;
}

void AnimationTrackEditor::_show_imported_anim_warning() {
	// It looks terrible on a single line but the TTR extractor doesn't support line breaks yet.
	EditorNode::get_singleton()->show_warning(
			TTR("This animation belongs to an imported scene, so changes to imported tracks will not be saved.\n\nTo modify this animation, navigate to the scene's Advanced Import settings and select the animation.\nSome options, including looping, are available here. To add custom tracks, enable \"Save To File\" and\n\"Keep Custom Tracks\"."));
}

void AnimationTrackEditor::_show_dummy_player_warning() {
	EditorNode::get_singleton()->show_warning(
			TTR("Some AnimationPlayerEditor's options are disabled since this is the dummy AnimationPlayer for preview.\n\nThe dummy player is forced active, non-deterministic and doesn't have the root motion track. Furthermore, the original node is inactive temporary."));
}

void AnimationTrackEditor::_show_inactive_player_warning() {
	EditorNode::get_singleton()->show_warning(
			TTR("AnimationPlayer is inactive. The playback will not be processed."));
}

void AnimationTrackEditor::_select_all_tracks_for_copy() {
	TreeItem *track = track_copy_select->get_root()->get_first_child();
	if (!track) {
		return;
	}

	bool all_selected = true;
	while (track) {
		if (!track->is_checked(0)) {
			all_selected = false;
		}

		track = track->get_next();
	}

	track = track_copy_select->get_root()->get_first_child();
	while (track) {
		track->set_checked(0, !all_selected);
		track = track->get_next();
	}
}

void AnimationTrackEditor::_bind_methods() {
	ClassDB::bind_method("_track_grab_focus", &AnimationTrackEditor::_track_grab_focus);
	ClassDB::bind_method("_redraw_tracks", &AnimationTrackEditor::_redraw_tracks);
	ClassDB::bind_method("_clear_selection_for_anim", &AnimationTrackEditor::_clear_selection_for_anim);
	ClassDB::bind_method("_select_at_anim", &AnimationTrackEditor::_select_at_anim);
	ClassDB::bind_method("_clear_selection", &AnimationTrackEditor::_clear_selection);

	ClassDB::bind_method(D_METHOD("_bezier_track_set_key_handle_mode", "animation", "track_idx", "key_idx", "key_handle_mode", "key_handle_set_mode"), &AnimationTrackEditor::_bezier_track_set_key_handle_mode, DEFVAL(Animation::HANDLE_SET_MODE_NONE));

	ADD_SIGNAL(MethodInfo("timeline_changed", PropertyInfo(Variant::FLOAT, "position"), PropertyInfo(Variant::BOOL, "timeline_only")));
	ADD_SIGNAL(MethodInfo("keying_changed"));
	ADD_SIGNAL(MethodInfo("animation_len_changed", PropertyInfo(Variant::FLOAT, "len")));
	ADD_SIGNAL(MethodInfo("animation_step_changed", PropertyInfo(Variant::FLOAT, "step")));
}

void AnimationTrackEditor::_pick_track_filter_text_changed(const String &p_newtext) {
	TreeItem *root_item = pick_track->get_scene_tree()->get_scene_tree()->get_root();

	Vector<Node *> select_candidates;
	Node *to_select = nullptr;

	String filter = pick_track->get_filter_line_edit()->get_text();

	_pick_track_select_recursive(root_item, filter, select_candidates);

	if (!select_candidates.is_empty()) {
		for (int i = 0; i < select_candidates.size(); ++i) {
			Node *candidate = select_candidates[i];

			if (((String)candidate->get_name()).to_lower().begins_with(filter.to_lower())) {
				to_select = candidate;
				break;
			}
		}

		if (!to_select) {
			to_select = select_candidates[0];
		}
	}

	pick_track->get_scene_tree()->set_selected(to_select);
}

void AnimationTrackEditor::_pick_track_select_recursive(TreeItem *p_item, const String &p_filter, Vector<Node *> &p_select_candidates) {
	if (!p_item) {
		return;
	}

	NodePath np = p_item->get_metadata(0);
	Node *node = get_node_or_null(np);

	if (node && !p_filter.is_empty() && ((String)node->get_name()).containsn(p_filter)) {
		p_select_candidates.push_back(node);
	}

	TreeItem *c = p_item->get_first_child();

	while (c) {
		_pick_track_select_recursive(c, p_filter, p_select_candidates);
		c = c->get_next();
	}
}

void AnimationTrackEditor::_pick_track_filter_input(const Ref<InputEvent> &p_ie) {
	Ref<InputEventKey> k = p_ie;

	if (k.is_valid()) {
		switch (k->get_keycode()) {
			case Key::UP:
			case Key::DOWN:
			case Key::PAGEUP:
			case Key::PAGEDOWN: {
				pick_track->get_scene_tree()->get_scene_tree()->gui_input(k);
				pick_track->get_filter_line_edit()->accept_event();
			} break;
			default:
				break;
		}
	}
}

AnimationTrackEditor::AnimationTrackEditor() {
	main_panel = memnew(PanelContainer);
	main_panel->set_focus_mode(FOCUS_ALL); // Allow panel to have focus so that shortcuts work as expected.
	add_child(main_panel);
	main_panel->set_v_size_flags(SIZE_EXPAND_FILL);
	HBoxContainer *timeline_scroll = memnew(HBoxContainer);
	main_panel->add_child(timeline_scroll);
	timeline_scroll->set_v_size_flags(SIZE_EXPAND_FILL);

	VBoxContainer *timeline_vbox = memnew(VBoxContainer);
	timeline_scroll->add_child(timeline_vbox);
	timeline_vbox->set_v_size_flags(SIZE_EXPAND_FILL);
	timeline_vbox->set_h_size_flags(SIZE_EXPAND_FILL);
	timeline_vbox->add_theme_constant_override("separation", 0);

	info_message = memnew(Label);
	info_message->set_text(TTR("Select an AnimationPlayer node to create and edit animations."));
	info_message->set_vertical_alignment(VERTICAL_ALIGNMENT_CENTER);
	info_message->set_horizontal_alignment(HORIZONTAL_ALIGNMENT_CENTER);
	info_message->set_autowrap_mode(TextServer::AUTOWRAP_WORD_SMART);
	info_message->set_custom_minimum_size(Size2(100 * EDSCALE, 0));
	info_message->set_anchors_and_offsets_preset(PRESET_FULL_RECT, PRESET_MODE_KEEP_SIZE, 8 * EDSCALE);
	main_panel->add_child(info_message);

	timeline = memnew(AnimationTimelineEdit);
	timeline_vbox->add_child(timeline);
	timeline->connect("timeline_changed", callable_mp(this, &AnimationTrackEditor::_timeline_changed));
	timeline->connect("name_limit_changed", callable_mp(this, &AnimationTrackEditor::_name_limit_changed));
	timeline->connect("track_added", callable_mp(this, &AnimationTrackEditor::_add_track));
	timeline->connect(SceneStringName(value_changed), callable_mp(this, &AnimationTrackEditor::_timeline_value_changed));
	timeline->connect("length_changed", callable_mp(this, &AnimationTrackEditor::_update_length));

	panner.instantiate();
	panner->set_scroll_zoom_factor(AnimationTimelineEdit::SCROLL_ZOOM_FACTOR_IN);
	panner->set_callbacks(callable_mp(this, &AnimationTrackEditor::_pan_callback), callable_mp(this, &AnimationTrackEditor::_zoom_callback));

	scroll = memnew(ScrollContainer);
	timeline_vbox->add_child(scroll);
	scroll->set_v_size_flags(SIZE_EXPAND_FILL);
	VScrollBar *sb = scroll->get_v_scroll_bar();
	scroll->remove_child(sb);
	timeline_scroll->add_child(sb); // Move here so timeline and tracks are always aligned.
	scroll->set_focus_mode(FOCUS_CLICK);
	scroll->connect(SceneStringName(gui_input), callable_mp(this, &AnimationTrackEditor::_scroll_input));
	scroll->connect(SceneStringName(focus_exited), callable_mp(panner.ptr(), &ViewPanner::release_pan_key));

	bezier_edit = memnew(AnimationBezierTrackEdit);
	timeline_vbox->add_child(bezier_edit);
	bezier_edit->set_editor(this);
	bezier_edit->set_timeline(timeline);
	bezier_edit->hide();
	bezier_edit->set_v_size_flags(SIZE_EXPAND_FILL);

	timeline_vbox->set_custom_minimum_size(Size2(0, 150) * EDSCALE);

	hscroll = memnew(HScrollBar);
	hscroll->share(timeline);
	hscroll->hide();
	hscroll->connect(SceneStringName(value_changed), callable_mp(this, &AnimationTrackEditor::_update_scroll));
	timeline_vbox->add_child(hscroll);
	timeline->set_hscroll(hscroll);

	track_vbox = memnew(VBoxContainer);
	scroll->add_child(track_vbox);
	track_vbox->set_h_size_flags(SIZE_EXPAND_FILL);
	scroll->set_horizontal_scroll_mode(ScrollContainer::SCROLL_MODE_DISABLED);
	track_vbox->add_theme_constant_override("separation", 0);

	HBoxContainer *bottom_hb = memnew(HBoxContainer);
	add_child(bottom_hb);

	imported_anim_warning = memnew(Button);
	imported_anim_warning->hide();
	imported_anim_warning->set_text(TTR("Imported Scene"));
	imported_anim_warning->set_tooltip_text(TTR("Warning: Editing imported animation"));
	imported_anim_warning->connect(SceneStringName(pressed), callable_mp(this, &AnimationTrackEditor::_show_imported_anim_warning));
	bottom_hb->add_child(imported_anim_warning);

	dummy_player_warning = memnew(Button);
	dummy_player_warning->hide();
	dummy_player_warning->set_text(TTR("Dummy Player"));
	dummy_player_warning->set_tooltip_text(TTR("Warning: Editing dummy AnimationPlayer"));
	dummy_player_warning->connect(SceneStringName(pressed), callable_mp(this, &AnimationTrackEditor::_show_dummy_player_warning));
	bottom_hb->add_child(dummy_player_warning);

	inactive_player_warning = memnew(Button);
	inactive_player_warning->hide();
	inactive_player_warning->set_text(TTR("Inactive Player"));
	inactive_player_warning->set_tooltip_text(TTR("Warning: AnimationPlayer is inactive"));
	inactive_player_warning->connect(SceneStringName(pressed), callable_mp(this, &AnimationTrackEditor::_show_inactive_player_warning));
	bottom_hb->add_child(inactive_player_warning);

	bottom_hb->add_spacer();

	bezier_edit_icon = memnew(Button);
	bezier_edit_icon->set_flat(true);
	bezier_edit_icon->set_disabled(true);
	bezier_edit_icon->set_toggle_mode(true);
	bezier_edit_icon->connect(SceneStringName(pressed), callable_mp(this, &AnimationTrackEditor::_toggle_bezier_edit));
	bezier_edit_icon->set_tooltip_text(TTR("Toggle between the bezier curve editor and track editor."));

	bottom_hb->add_child(bezier_edit_icon);

	selected_filter = memnew(Button);
	selected_filter->set_flat(true);
	selected_filter->connect(SceneStringName(pressed), callable_mp(this, &AnimationTrackEditor::_view_group_toggle)); // Same function works the same.
	selected_filter->set_toggle_mode(true);
	selected_filter->set_tooltip_text(TTR("Only show tracks from nodes selected in tree."));

	bottom_hb->add_child(selected_filter);

	view_group = memnew(Button);
	view_group->set_flat(true);
	view_group->connect(SceneStringName(pressed), callable_mp(this, &AnimationTrackEditor::_view_group_toggle));
	view_group->set_toggle_mode(true);
	view_group->set_tooltip_text(TTR("Group tracks by node or display them as plain list."));

	bottom_hb->add_child(view_group);
	bottom_hb->add_child(memnew(VSeparator));

	snap = memnew(Button);
	snap->set_flat(true);
	snap->set_text(TTR("Snap:") + " ");
	bottom_hb->add_child(snap);
	snap->set_disabled(true);
	snap->set_toggle_mode(true);
	snap->set_pressed(true);

	step = memnew(EditorSpinSlider);
	step->set_min(0);
	step->set_max(1000000);
	step->set_step(SECOND_DECIMAL);
	step->set_hide_slider(true);
	step->set_custom_minimum_size(Size2(100, 0) * EDSCALE);
	step->set_tooltip_text(TTR("Animation step value."));
	bottom_hb->add_child(step);
	step->connect(SceneStringName(value_changed), callable_mp(this, &AnimationTrackEditor::_update_step));
	step->set_read_only(true);

	snap_mode = memnew(OptionButton);
	snap_mode->add_item(TTR("Seconds"));
	snap_mode->add_item(TTR("FPS"));
	bottom_hb->add_child(snap_mode);
	snap_mode->connect(SceneStringName(item_selected), callable_mp(this, &AnimationTrackEditor::_snap_mode_changed));
	snap_mode->set_disabled(true);

	bottom_hb->add_child(memnew(VSeparator));

	zoom_icon = memnew(TextureRect);
	zoom_icon->set_v_size_flags(SIZE_SHRINK_CENTER);
	bottom_hb->add_child(zoom_icon);
	zoom = memnew(HSlider);
	zoom->set_step(0.01);
	zoom->set_min(0.0);
	zoom->set_max(2.0);
	zoom->set_value(1.0);
	zoom->set_custom_minimum_size(Size2(200, 0) * EDSCALE);
	zoom->set_v_size_flags(SIZE_SHRINK_CENTER);
	bottom_hb->add_child(zoom);
	timeline->set_zoom(zoom);

	ED_SHORTCUT("animation_editor/auto_fit", TTR("Fit to panel"), KeyModifierMask::ALT | Key::F);

	auto_fit = memnew(Button);
	auto_fit->set_flat(true);
	auto_fit->connect(SceneStringName(pressed), callable_mp(this, &AnimationTrackEditor::_auto_fit));
	auto_fit->set_shortcut(ED_GET_SHORTCUT("animation_editor/auto_fit"));
	bottom_hb->add_child(auto_fit);

	auto_fit_bezier = memnew(Button);
	auto_fit_bezier->set_flat(true);
	auto_fit_bezier->set_visible(false);
	auto_fit_bezier->connect(SceneStringName(pressed), callable_mp(this, &AnimationTrackEditor::_auto_fit_bezier));
	auto_fit_bezier->set_shortcut(ED_GET_SHORTCUT("animation_editor/auto_fit"));
	bottom_hb->add_child(auto_fit_bezier);

	edit = memnew(MenuButton);
	edit->set_shortcut_context(this);
	edit->set_text(TTR("Edit"));
	edit->set_flat(false);
	edit->set_disabled(true);
	edit->set_tooltip_text(TTR("Animation properties."));
	edit->get_popup()->add_item(TTR("Copy Tracks..."), EDIT_COPY_TRACKS);
	edit->get_popup()->add_item(TTR("Paste Tracks"), EDIT_PASTE_TRACKS);
	edit->get_popup()->add_separator();
	edit->get_popup()->add_item(TTR("Scale Selection..."), EDIT_SCALE_SELECTION);
	edit->get_popup()->add_item(TTR("Scale From Cursor..."), EDIT_SCALE_FROM_CURSOR);
	edit->get_popup()->add_separator();
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/set_start_offset", TTR("Set Start Offset (Audio)"), KeyModifierMask::CMD_OR_CTRL | Key::BRACKETLEFT), EDIT_SET_START_OFFSET);
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/set_end_offset", TTR("Set End Offset (Audio)"), KeyModifierMask::CMD_OR_CTRL | Key::BRACKETRIGHT), EDIT_SET_END_OFFSET);
	edit->get_popup()->add_separator();
	edit->get_popup()->add_item(TTR("Make Easing Selection..."), EDIT_EASE_SELECTION);
	edit->get_popup()->add_separator();
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/duplicate_selected_keys", TTR("Duplicate Selected Keys"), KeyModifierMask::CMD_OR_CTRL | Key::D), EDIT_DUPLICATE_SELECTED_KEYS);
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/cut_selected_keys", TTR("Cut Selected Keys"), KeyModifierMask::CMD_OR_CTRL | Key::X), EDIT_CUT_KEYS);
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/copy_selected_keys", TTR("Copy Selected Keys"), KeyModifierMask::CMD_OR_CTRL | Key::C), EDIT_COPY_KEYS);
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/paste_keys", TTR("Paste Keys"), KeyModifierMask::CMD_OR_CTRL | Key::V), EDIT_PASTE_KEYS);
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/add_reset_value", TTR("Add RESET Value(s)")));
	edit->get_popup()->add_separator();
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/move_first_selected_key_to_cursor", TTR("Move First Selected Key to Cursor"), Key::BRACKETLEFT), EDIT_MOVE_FIRST_SELECTED_KEY_TO_CURSOR);
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/move_last_selected_key_to_cursor", TTR("Move Last Selected Key to Cursor"), Key::BRACKETRIGHT), EDIT_MOVE_LAST_SELECTED_KEY_TO_CURSOR);
	edit->get_popup()->add_separator();
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/delete_selection", TTR("Delete Selection"), Key::KEY_DELETE), EDIT_DELETE_SELECTION);

	edit->get_popup()->add_separator();
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/goto_next_step", TTR("Go to Next Step"), KeyModifierMask::CMD_OR_CTRL | Key::RIGHT), EDIT_GOTO_NEXT_STEP);
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/goto_prev_step", TTR("Go to Previous Step"), KeyModifierMask::CMD_OR_CTRL | Key::LEFT), EDIT_GOTO_PREV_STEP);
	edit->get_popup()->add_separator();
	edit->get_popup()->add_shortcut(ED_SHORTCUT("animation_editor/apply_reset", TTR("Apply Reset")), EDIT_APPLY_RESET);
	edit->get_popup()->add_separator();
	edit->get_popup()->add_item(TTR("Bake Animation..."), EDIT_BAKE_ANIMATION);
	edit->get_popup()->add_item(TTR("Optimize Animation (no undo)..."), EDIT_OPTIMIZE_ANIMATION);
	edit->get_popup()->add_item(TTR("Clean-Up Animation (no undo)..."), EDIT_CLEAN_UP_ANIMATION);

	edit->get_popup()->connect(SceneStringName(id_pressed), callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed));
	edit->get_popup()->connect("about_to_popup", callable_mp(this, &AnimationTrackEditor::_edit_menu_about_to_popup));

	pick_track = memnew(SceneTreeDialog);
	add_child(pick_track);
	pick_track->register_text_enter(pick_track->get_filter_line_edit());
	pick_track->set_title(TTR("Pick a node to animate:"));
	pick_track->connect("selected", callable_mp(this, &AnimationTrackEditor::_new_track_node_selected));
	pick_track->get_filter_line_edit()->connect(SceneStringName(text_changed), callable_mp(this, &AnimationTrackEditor::_pick_track_filter_text_changed));
	pick_track->get_filter_line_edit()->connect(SceneStringName(gui_input), callable_mp(this, &AnimationTrackEditor::_pick_track_filter_input));

	prop_selector = memnew(PropertySelector);
	add_child(prop_selector);
	prop_selector->connect("selected", callable_mp(this, &AnimationTrackEditor::_new_track_property_selected));

	method_selector = memnew(PropertySelector);
	add_child(method_selector);
	method_selector->connect("selected", callable_mp(this, &AnimationTrackEditor::_add_method_key));

	insert_confirm = memnew(ConfirmationDialog);
	add_child(insert_confirm);
	insert_confirm->connect(SceneStringName(confirmed), callable_mp(this, &AnimationTrackEditor::_confirm_insert_list));
	VBoxContainer *icvb = memnew(VBoxContainer);
	insert_confirm->add_child(icvb);
	insert_confirm_text = memnew(Label);
	icvb->add_child(insert_confirm_text);
	HBoxContainer *ichb = memnew(HBoxContainer);
	icvb->add_child(ichb);
	insert_confirm_bezier = memnew(CheckBox);
	insert_confirm_bezier->set_text(TTR("Use Bezier Curves"));
	insert_confirm_bezier->set_pressed(EDITOR_GET("editors/animation/default_create_bezier_tracks"));
	ichb->add_child(insert_confirm_bezier);
	insert_confirm_reset = memnew(CheckBox);
	insert_confirm_reset->set_text(TTR("Create RESET Track(s)", ""));
	insert_confirm_reset->set_pressed(EDITOR_GET("editors/animation/default_create_reset_tracks"));
	ichb->add_child(insert_confirm_reset);

	box_selection = memnew(Control);
	add_child(box_selection);
	box_selection->set_as_top_level(true);
	box_selection->set_mouse_filter(MOUSE_FILTER_IGNORE);
	box_selection->hide();
	box_selection->connect(SceneStringName(draw), callable_mp(this, &AnimationTrackEditor::_box_selection_draw));

	// Default Plugins.

	Ref<AnimationTrackEditDefaultPlugin> def_plugin;
	def_plugin.instantiate();
	add_track_edit_plugin(def_plugin);

	// Dialogs.

	optimize_dialog = memnew(ConfirmationDialog);
	add_child(optimize_dialog);
	optimize_dialog->set_title(TTR("Animation Optimizer"));
	VBoxContainer *optimize_vb = memnew(VBoxContainer);
	optimize_dialog->add_child(optimize_vb);

	optimize_velocity_error = memnew(SpinBox);
	optimize_velocity_error->set_max(1.0);
	optimize_velocity_error->set_min(0.001);
	optimize_velocity_error->set_step(0.001);
	optimize_velocity_error->set_value(0.01);
	optimize_vb->add_margin_child(TTR("Max Velocity Error:"), optimize_velocity_error);
	optimize_angular_error = memnew(SpinBox);
	optimize_angular_error->set_max(1.0);
	optimize_angular_error->set_min(0.001);
	optimize_angular_error->set_step(0.001);
	optimize_angular_error->set_value(0.01);
	optimize_vb->add_margin_child(TTR("Max Angular Error:"), optimize_angular_error);
	optimize_precision_error = memnew(SpinBox);
	optimize_precision_error->set_max(6);
	optimize_precision_error->set_min(1);
	optimize_precision_error->set_step(1);
	optimize_precision_error->set_value(3);
	optimize_vb->add_margin_child(TTR("Max Precision Error:"), optimize_precision_error);

	optimize_dialog->set_ok_button_text(TTR("Optimize"));
	optimize_dialog->connect(SceneStringName(confirmed), callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed).bind(EDIT_OPTIMIZE_ANIMATION_CONFIRM));

	//
	cleanup_dialog = memnew(ConfirmationDialog);
	add_child(cleanup_dialog);
	VBoxContainer *cleanup_vb = memnew(VBoxContainer);
	cleanup_dialog->add_child(cleanup_vb);

	cleanup_keys_with_trimming_head = memnew(CheckBox);
	cleanup_keys_with_trimming_head->set_text(TTR("Trim keys placed in negative time"));
	cleanup_keys_with_trimming_head->set_pressed(true);
	cleanup_vb->add_child(cleanup_keys_with_trimming_head);

	cleanup_keys_with_trimming_end = memnew(CheckBox);
	cleanup_keys_with_trimming_end->set_text(TTR("Trim keys placed exceed the animation length"));
	cleanup_keys_with_trimming_end->set_pressed(true);
	cleanup_vb->add_child(cleanup_keys_with_trimming_end);

	cleanup_keys = memnew(CheckBox);
	cleanup_keys->set_text(TTR("Remove invalid keys"));
	cleanup_keys->set_pressed(true);
	cleanup_vb->add_child(cleanup_keys);

	cleanup_tracks = memnew(CheckBox);
	cleanup_tracks->set_text(TTR("Remove unresolved and empty tracks"));
	cleanup_tracks->set_pressed(true);
	cleanup_vb->add_child(cleanup_tracks);

	cleanup_all = memnew(CheckBox);
	cleanup_all->set_text(TTR("Clean-up all animations"));
	cleanup_vb->add_child(cleanup_all);

	cleanup_dialog->set_title(TTR("Clean-Up Animation(s) (NO UNDO!)"));
	cleanup_dialog->set_ok_button_text(TTR("Clean-Up"));

	cleanup_dialog->connect(SceneStringName(confirmed), callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed).bind(EDIT_CLEAN_UP_ANIMATION_CONFIRM));

	//
	scale_dialog = memnew(ConfirmationDialog);
	VBoxContainer *vbc = memnew(VBoxContainer);
	scale_dialog->add_child(vbc);

	scale = memnew(SpinBox);
	scale->set_min(-99999);
	scale->set_max(99999);
	scale->set_step(0.001);
	vbc->add_margin_child(TTR("Scale Ratio:"), scale);
	scale_dialog->connect(SceneStringName(confirmed), callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed).bind(EDIT_SCALE_CONFIRM));
	add_child(scale_dialog);

	//
	ease_dialog = memnew(ConfirmationDialog);
	ease_dialog->set_title(TTR("Select Transition and Easing"));
	ease_dialog->connect(SceneStringName(confirmed), callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed).bind(EDIT_EASE_CONFIRM));
	add_child(ease_dialog);
	GridContainer *ease_grid = memnew(GridContainer);
	ease_grid->set_columns(2);
	ease_dialog->add_child(ease_grid);
	transition_selection = memnew(OptionButton);
	transition_selection->add_item(TTR("Linear", "Transition Type"), Tween::TRANS_LINEAR);
	transition_selection->add_item(TTR("Sine", "Transition Type"), Tween::TRANS_SINE);
	transition_selection->add_item(TTR("Quint", "Transition Type"), Tween::TRANS_QUINT);
	transition_selection->add_item(TTR("Quart", "Transition Type"), Tween::TRANS_QUART);
	transition_selection->add_item(TTR("Quad", "Transition Type"), Tween::TRANS_QUAD);
	transition_selection->add_item(TTR("Expo", "Transition Type"), Tween::TRANS_EXPO);
	transition_selection->add_item(TTR("Elastic", "Transition Type"), Tween::TRANS_ELASTIC);
	transition_selection->add_item(TTR("Cubic", "Transition Type"), Tween::TRANS_CUBIC);
	transition_selection->add_item(TTR("Circ", "Transition Type"), Tween::TRANS_CIRC);
	transition_selection->add_item(TTR("Bounce", "Transition Type"), Tween::TRANS_BOUNCE);
	transition_selection->add_item(TTR("Back", "Transition Type"), Tween::TRANS_BACK);
	transition_selection->add_item(TTR("Spring", "Transition Type"), Tween::TRANS_SPRING);
	transition_selection->select(Tween::TRANS_LINEAR); // Default
	transition_selection->set_auto_translate_mode(AUTO_TRANSLATE_MODE_DISABLED); // Translation context is needed.
	ease_selection = memnew(OptionButton);
	ease_selection->add_item(TTR("In", "Ease Type"), Tween::EASE_IN);
	ease_selection->add_item(TTR("Out", "Ease Type"), Tween::EASE_OUT);
	ease_selection->add_item(TTR("InOut", "Ease Type"), Tween::EASE_IN_OUT);
	ease_selection->add_item(TTR("OutIn", "Ease Type"), Tween::EASE_OUT_IN);
	ease_selection->select(Tween::EASE_IN_OUT); // Default
	ease_selection->set_auto_translate_mode(AUTO_TRANSLATE_MODE_DISABLED); // Translation context is needed.
	ease_fps = memnew(SpinBox);
	ease_fps->set_min(FPS_DECIMAL);
	ease_fps->set_max(999);
	ease_fps->set_step(FPS_DECIMAL);
	ease_fps->set_value(30); // Default
	ease_grid->add_child(memnew(Label(TTR("Transition Type:"))));
	ease_grid->add_child(transition_selection);
	ease_grid->add_child(memnew(Label(TTR("Ease Type:"))));
	ease_grid->add_child(ease_selection);
	ease_grid->add_child(memnew(Label(TTR("FPS:"))));
	ease_grid->add_child(ease_fps);

	//
	bake_dialog = memnew(ConfirmationDialog);
	bake_dialog->set_title(TTR("Animation Baker"));
	bake_dialog->connect(SceneStringName(confirmed), callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed).bind(EDIT_BAKE_ANIMATION_CONFIRM));
	add_child(bake_dialog);
	GridContainer *bake_grid = memnew(GridContainer);
	bake_grid->set_columns(2);
	bake_dialog->add_child(bake_grid);
	bake_trs = memnew(CheckBox);
	bake_trs->set_pressed(true);
	bake_blendshape = memnew(CheckBox);
	bake_blendshape->set_pressed(true);
	bake_value = memnew(CheckBox);
	bake_value->set_pressed(true);
	bake_fps = memnew(SpinBox);
	bake_fps->set_min(FPS_DECIMAL);
	bake_fps->set_max(999);
	bake_fps->set_step(FPS_DECIMAL);
	bake_fps->set_value(30); // Default
	bake_grid->add_child(memnew(Label(TTR("3D Pos/Rot/Scl Track:"))));
	bake_grid->add_child(bake_trs);
	bake_grid->add_child(memnew(Label(TTR("Blendshape Track:"))));
	bake_grid->add_child(bake_blendshape);
	bake_grid->add_child(memnew(Label(TTR("Value Track:"))));
	bake_grid->add_child(bake_value);
	bake_grid->add_child(memnew(Label(TTR("FPS:"))));
	bake_grid->add_child(bake_fps);

	//
	track_copy_dialog = memnew(ConfirmationDialog);
	add_child(track_copy_dialog);
	track_copy_dialog->set_title(TTR("Select Tracks to Copy"));
	track_copy_dialog->set_ok_button_text(TTR("Copy"));

	VBoxContainer *track_copy_vbox = memnew(VBoxContainer);
	track_copy_dialog->add_child(track_copy_vbox);

	Button *select_all_button = memnew(Button);
	select_all_button->set_text(TTR("Select All/None"));
	select_all_button->connect(SceneStringName(pressed), callable_mp(this, &AnimationTrackEditor::_select_all_tracks_for_copy));
	track_copy_vbox->add_child(select_all_button);

	track_copy_select = memnew(Tree);
	track_copy_select->set_auto_translate_mode(AUTO_TRANSLATE_MODE_DISABLED);
	track_copy_select->set_h_size_flags(SIZE_EXPAND_FILL);
	track_copy_select->set_v_size_flags(SIZE_EXPAND_FILL);
	track_copy_select->set_hide_root(true);
	track_copy_vbox->add_child(track_copy_select);
	track_copy_dialog->connect(SceneStringName(confirmed), callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed).bind(EDIT_COPY_TRACKS_CONFIRM));
}

AnimationTrackEditor::~AnimationTrackEditor() {
	if (key_edit) {
		memdelete(key_edit);
	}
	if (multi_key_edit) {
		memdelete(multi_key_edit);
	}
}

// AnimationTrackKeyEditEditorPlugin

void AnimationTrackKeyEditEditor::_time_edit_entered() {
	int key = animation->track_find_key(track, key_ofs, Animation::FIND_MODE_APPROX);
	if (key == -1) {
		return;
	}
	key_data_cache.time = animation->track_get_key_time(track, key);
	key_data_cache.transition = animation->track_get_key_transition(track, key);
	key_data_cache.value = animation->track_get_key_value(track, key);
}

void AnimationTrackKeyEditEditor::_time_edit_exited() {
	real_t new_time = spinner->get_value();

	if (use_fps) {
		real_t fps = animation->get_step();
		if (fps > 0) {
			fps = 1.0 / fps;
		}
		new_time /= fps;
	}

	if (Math::is_equal_approx(new_time, key_data_cache.time)) {
		return; // No change.
	}

	int existing = animation->track_find_key(track, new_time, Animation::FIND_MODE_APPROX);
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Animation Change Keyframe Time"), UndoRedo::MERGE_ENDS);

	if (existing != -1) {
		undo_redo->add_do_method(animation.ptr(), "track_remove_key_at_time", track, animation->track_get_key_time(track, existing));
	}
	undo_redo->add_do_method(animation.ptr(), "track_remove_key_at_time", track, key_data_cache.time);
	undo_redo->add_do_method(animation.ptr(), "track_insert_key", track, new_time, key_data_cache.value, key_data_cache.transition);
	undo_redo->add_undo_method(animation.ptr(), "track_remove_key_at_time", track, new_time);
	undo_redo->add_undo_method(animation.ptr(), "track_insert_key", track, key_data_cache.time, key_data_cache.value, key_data_cache.transition);
	if (existing != -1) {
		undo_redo->add_undo_method(animation.ptr(), "track_insert_key", track, animation->track_get_key_time(track, existing), animation->track_get_key_value(track, existing), animation->track_get_key_transition(track, existing));
	}

	// Reselect key.
	AnimationPlayerEditor *ape = AnimationPlayerEditor::get_singleton();
	if (ape) {
		AnimationTrackEditor *ate = ape->get_track_editor();
		if (ate) {
			undo_redo->add_do_method(ate, "_clear_selection_for_anim", animation);
			undo_redo->add_undo_method(ate, "_clear_selection_for_anim", animation);
			undo_redo->add_do_method(ate, "_select_at_anim", animation, track, new_time);
			undo_redo->add_undo_method(ate, "_select_at_anim", animation, track, key_data_cache.time);
		}
	}

	undo_redo->commit_action();
}

AnimationTrackKeyEditEditor::AnimationTrackKeyEditEditor(Ref<Animation> p_animation, int p_track, real_t p_key_ofs, bool p_use_fps) {
	if (!p_animation.is_valid()) {
		return;
	}

	animation = p_animation;
	track = p_track;
	key_ofs = p_key_ofs;
	use_fps = p_use_fps;

	set_label("Time");

	spinner = memnew(EditorSpinSlider);
	spinner->set_focus_mode(Control::FOCUS_CLICK);
	spinner->set_min(0);
	spinner->set_allow_greater(true);
	spinner->set_allow_lesser(true);

	if (use_fps) {
		spinner->set_step(FPS_DECIMAL);
		real_t fps = animation->get_step();
		if (fps > 0) {
			fps = 1.0 / fps;
		}
		spinner->set_value(key_ofs * fps);
	} else {
		spinner->set_step(SECOND_DECIMAL);
		spinner->set_value(key_ofs);
		spinner->set_max(animation->get_length());
	}

	add_child(spinner);

	spinner->connect("grabbed", callable_mp(this, &AnimationTrackKeyEditEditor::_time_edit_entered), CONNECT_DEFERRED);
	spinner->connect("ungrabbed", callable_mp(this, &AnimationTrackKeyEditEditor::_time_edit_exited), CONNECT_DEFERRED);
	spinner->connect("value_focus_entered", callable_mp(this, &AnimationTrackKeyEditEditor::_time_edit_entered), CONNECT_DEFERRED);
	spinner->connect("value_focus_exited", callable_mp(this, &AnimationTrackKeyEditEditor::_time_edit_exited), CONNECT_DEFERRED);
}

AnimationTrackKeyEditEditor::~AnimationTrackKeyEditEditor() {
}