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https://gitlab.freedesktop.org/wayland/weston
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![Quentin Glidic](/assets/img/avatar_default.png)
libweston-desktop is an abstraction library for compositors wanting to support desktop-like shells. The API is designed from xdg_shell features, as it will eventually be the recommended shell for modern applications to use. In the future, adding new shell protocols support will be easier, as limited to libweston-desktop. The library versioning is the same as libweston. If one of them break ABI compatibility, the other will too. The compositor will only ever see toplevel surfaces (“windows”), with all the other being internal implementation details. Thus, popups and associated grabs are handled entirely in libweston-desktop. Xwayland special surfaces (override-redirect) are special-cased to a dedicated layer, as the compositor should not know about them. All the shell error checking is taken care of too, as well as some specification rules (e.g. sizes constraint for maximized and fullscreen surfaces). All the compositor has to do is define a few callbacks in the interface struct, and manage toplevel surfaces. Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net> Reviewed-by: Jonas Ådahl <jadahl@gmail.com> Acked-by: Giulio Camuffo <giulio.camuffo@kdab.com> Differential Revision: https://phabricator.freedesktop.org/D1207
369 lines
11 KiB
C
369 lines
11 KiB
C
/*
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* Copyright © 2010-2012 Intel Corporation
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* Copyright © 2011-2012 Collabora, Ltd.
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* Copyright © 2013 Raspberry Pi Foundation
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* Copyright © 2016 Quentin "Sardem FF7" Glidic
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "config.h"
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#include <assert.h>
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#include <wayland-server.h>
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#include "compositor.h"
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#include "zalloc.h"
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#include "libweston-desktop.h"
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#include "internal.h"
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struct weston_desktop_seat {
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struct wl_listener seat_destroy_listener;
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struct weston_seat *seat;
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struct {
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struct weston_keyboard_grab keyboard;
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struct weston_pointer_grab pointer;
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struct weston_touch_grab touch;
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bool initial_up;
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struct wl_client *client;
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struct wl_list surfaces;
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} popup_grab;
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};
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static void weston_desktop_seat_popup_grab_end(struct weston_desktop_seat *seat);
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static void
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weston_desktop_seat_popup_grab_keyboard_key(struct weston_keyboard_grab *grab,
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uint32_t time, uint32_t key,
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enum wl_keyboard_key_state state)
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{
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weston_keyboard_send_key(grab->keyboard, time, key, state);
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}
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static void
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weston_desktop_seat_popup_grab_keyboard_modifiers(struct weston_keyboard_grab *grab,
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uint32_t serial,
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uint32_t mods_depressed,
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uint32_t mods_latched,
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uint32_t mods_locked,
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uint32_t group)
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{
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weston_keyboard_send_modifiers(grab->keyboard, serial, mods_depressed,
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mods_latched, mods_locked, group);
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}
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static void
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weston_desktop_seat_popup_grab_keyboard_cancel(struct weston_keyboard_grab *grab)
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{
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struct weston_desktop_seat *seat =
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wl_container_of(grab, seat, popup_grab.keyboard);
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weston_desktop_seat_popup_grab_end(seat);
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}
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static const struct weston_keyboard_grab_interface weston_desktop_seat_keyboard_popup_grab_interface = {
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.key = weston_desktop_seat_popup_grab_keyboard_key,
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.modifiers = weston_desktop_seat_popup_grab_keyboard_modifiers,
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.cancel = weston_desktop_seat_popup_grab_keyboard_cancel,
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};
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static void
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weston_desktop_seat_popup_grab_pointer_focus(struct weston_pointer_grab *grab)
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{
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struct weston_desktop_seat *seat =
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wl_container_of(grab, seat, popup_grab.pointer);
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struct weston_pointer *pointer = grab->pointer;
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struct weston_view *view;
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wl_fixed_t sx, sy;
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view = weston_compositor_pick_view(pointer->seat->compositor,
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pointer->x, pointer->y, &sx, &sy);
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if (view != NULL &&
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view->surface->resource != NULL &&
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wl_resource_get_client(view->surface->resource) == seat->popup_grab.client)
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weston_pointer_set_focus(pointer, view, sx, sy);
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else
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weston_pointer_clear_focus(pointer);
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}
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static void
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weston_desktop_seat_popup_grab_pointer_motion(struct weston_pointer_grab *grab,
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uint32_t time,
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struct weston_pointer_motion_event *event)
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{
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weston_pointer_send_motion(grab->pointer, time, event);
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}
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static void
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weston_desktop_seat_popup_grab_pointer_button(struct weston_pointer_grab *grab,
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uint32_t time, uint32_t button,
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enum wl_pointer_button_state state)
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{
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struct weston_desktop_seat *seat =
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wl_container_of(grab, seat, popup_grab.pointer);
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struct weston_pointer *pointer = grab->pointer;
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bool initial_up = seat->popup_grab.initial_up;
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if (state == WL_POINTER_BUTTON_STATE_RELEASED)
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seat->popup_grab.initial_up = true;
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if (weston_pointer_has_focus_resource(pointer))
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weston_pointer_send_button(pointer, time, button, state);
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else if (state == WL_POINTER_BUTTON_STATE_RELEASED &&
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(initial_up || (time - grab->pointer->grab_time) > 500))
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weston_desktop_seat_popup_grab_end(seat);
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}
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static void
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weston_desktop_seat_popup_grab_pointer_axis(struct weston_pointer_grab *grab,
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uint32_t time,
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struct weston_pointer_axis_event *event)
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{
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weston_pointer_send_axis(grab->pointer, time, event);
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}
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static void
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weston_desktop_seat_popup_grab_pointer_axis_source(struct weston_pointer_grab *grab,
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uint32_t source)
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{
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weston_pointer_send_axis_source(grab->pointer, source);
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}
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static void
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weston_desktop_seat_popup_grab_pointer_frame(struct weston_pointer_grab *grab)
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{
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weston_pointer_send_frame(grab->pointer);
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}
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static void
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weston_desktop_seat_popup_grab_pointer_cancel(struct weston_pointer_grab *grab)
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{
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struct weston_desktop_seat *seat =
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wl_container_of(grab, seat, popup_grab.pointer);
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weston_desktop_seat_popup_grab_end(seat);
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}
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static const struct weston_pointer_grab_interface weston_desktop_seat_pointer_popup_grab_interface = {
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.focus = weston_desktop_seat_popup_grab_pointer_focus,
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.motion = weston_desktop_seat_popup_grab_pointer_motion,
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.button = weston_desktop_seat_popup_grab_pointer_button,
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.axis = weston_desktop_seat_popup_grab_pointer_axis,
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.axis_source = weston_desktop_seat_popup_grab_pointer_axis_source,
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.frame = weston_desktop_seat_popup_grab_pointer_frame,
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.cancel = weston_desktop_seat_popup_grab_pointer_cancel,
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};
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static void
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weston_desktop_seat_popup_grab_touch_down(struct weston_touch_grab *grab,
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uint32_t time, int touch_id,
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wl_fixed_t sx, wl_fixed_t sy)
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{
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weston_touch_send_down(grab->touch, time, touch_id, sx, sy);
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}
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static void
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weston_desktop_seat_popup_grab_touch_up(struct weston_touch_grab *grab,
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uint32_t time, int touch_id)
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{
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weston_touch_send_up(grab->touch, time, touch_id);
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}
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static void
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weston_desktop_seat_popup_grab_touch_motion(struct weston_touch_grab *grab,
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uint32_t time, int touch_id,
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wl_fixed_t sx, wl_fixed_t sy)
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{
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weston_touch_send_motion(grab->touch, time, touch_id, sx, sy);
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}
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static void
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weston_desktop_seat_popup_grab_touch_frame(struct weston_touch_grab *grab)
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{
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weston_touch_send_frame(grab->touch);
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}
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static void
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weston_desktop_seat_popup_grab_touch_cancel(struct weston_touch_grab *grab)
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{
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struct weston_desktop_seat *seat =
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wl_container_of(grab, seat, popup_grab.touch);
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weston_desktop_seat_popup_grab_end(seat);
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}
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static const struct weston_touch_grab_interface weston_desktop_seat_touch_popup_grab_interface = {
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.down = weston_desktop_seat_popup_grab_touch_down,
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.up = weston_desktop_seat_popup_grab_touch_up,
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.motion = weston_desktop_seat_popup_grab_touch_motion,
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.frame = weston_desktop_seat_popup_grab_touch_frame,
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.cancel = weston_desktop_seat_popup_grab_touch_cancel,
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};
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static void
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weston_desktop_seat_destroy(struct wl_listener *listener, void *data)
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{
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struct weston_desktop_seat *seat =
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wl_container_of(listener, seat, seat_destroy_listener);
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free(seat);
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}
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struct weston_desktop_seat *
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weston_desktop_seat_from_seat(struct weston_seat *wseat)
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{
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struct wl_listener *listener;
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struct weston_desktop_seat *seat;
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listener = wl_signal_get(&wseat->destroy_signal,
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weston_desktop_seat_destroy);
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if (listener != NULL)
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return wl_container_of(listener, seat, seat_destroy_listener);
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seat = zalloc(sizeof(struct weston_desktop_seat));
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if (seat == NULL)
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return NULL;
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seat->seat = wseat;
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seat->seat_destroy_listener.notify = weston_desktop_seat_destroy;
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wl_signal_add(&wseat->destroy_signal, &seat->seat_destroy_listener);
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seat->popup_grab.keyboard.interface =
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&weston_desktop_seat_keyboard_popup_grab_interface;
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seat->popup_grab.pointer.interface =
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&weston_desktop_seat_pointer_popup_grab_interface;
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seat->popup_grab.touch.interface =
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&weston_desktop_seat_touch_popup_grab_interface;
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wl_list_init(&seat->popup_grab.surfaces);
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return seat;
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}
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struct weston_desktop_surface *
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weston_desktop_seat_popup_grab_get_topmost_surface(struct weston_desktop_seat *seat)
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{
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if (wl_list_empty(&seat->popup_grab.surfaces))
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return NULL;
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struct wl_list *grab_link = seat->popup_grab.surfaces.next;
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return weston_desktop_surface_from_grab_link(grab_link);
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}
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bool
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weston_desktop_seat_popup_grab_start(struct weston_desktop_seat *seat,
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struct wl_client *client, uint32_t serial)
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{
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assert(seat->popup_grab.client == NULL || seat->popup_grab.client == client);
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struct weston_keyboard *keyboard = weston_seat_get_keyboard(seat->seat);
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struct weston_pointer *pointer = weston_seat_get_pointer(seat->seat);
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struct weston_touch *touch = weston_seat_get_touch(seat->seat);
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if ((keyboard == NULL || keyboard->grab_serial != serial) &&
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(pointer == NULL || pointer->grab_serial != serial) &&
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(touch == NULL || touch->grab_serial != serial)) {
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return false;
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}
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if (keyboard != NULL &&
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keyboard->grab->interface != &weston_desktop_seat_keyboard_popup_grab_interface)
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weston_keyboard_start_grab(keyboard, &seat->popup_grab.keyboard);
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if (pointer != NULL &&
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pointer->grab->interface != &weston_desktop_seat_pointer_popup_grab_interface)
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weston_pointer_start_grab(pointer, &seat->popup_grab.pointer);
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if (touch != NULL &&
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touch->grab->interface != &weston_desktop_seat_touch_popup_grab_interface)
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weston_touch_start_grab(touch, &seat->popup_grab.touch);
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seat->popup_grab.initial_up =
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(pointer == NULL || pointer->button_count == 0);
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seat->popup_grab.client = client;
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return true;
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}
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static void
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weston_desktop_seat_popup_grab_end(struct weston_desktop_seat *seat)
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{
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struct weston_keyboard *keyboard = weston_seat_get_keyboard(seat->seat);
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struct weston_pointer *pointer = weston_seat_get_pointer(seat->seat);
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struct weston_touch *touch = weston_seat_get_touch(seat->seat);
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while (!wl_list_empty(&seat->popup_grab.surfaces)) {
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struct wl_list *link = seat->popup_grab.surfaces.prev;
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struct weston_desktop_surface *surface =
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weston_desktop_surface_from_grab_link(link);
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wl_list_remove(link);
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wl_list_init(link);
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weston_desktop_surface_popup_dismiss(surface);
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}
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if (keyboard != NULL &&
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keyboard->grab->interface == &weston_desktop_seat_keyboard_popup_grab_interface)
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weston_keyboard_end_grab(keyboard);
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if (pointer != NULL &&
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pointer->grab->interface == &weston_desktop_seat_pointer_popup_grab_interface)
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weston_pointer_end_grab(pointer);
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if (touch != NULL &&
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touch->grab->interface == &weston_desktop_seat_touch_popup_grab_interface)
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weston_touch_end_grab(touch);
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seat->popup_grab.client = NULL;
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}
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void
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weston_desktop_seat_popup_grab_add_surface(struct weston_desktop_seat *seat,
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struct wl_list *link)
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{
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assert(seat->popup_grab.client != NULL);
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wl_list_insert(&seat->popup_grab.surfaces, link);
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}
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void
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weston_desktop_seat_popup_grab_remove_surface(struct weston_desktop_seat *seat,
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struct wl_list *link)
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{
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assert(seat->popup_grab.client != NULL);
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wl_list_remove(link);
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wl_list_init(link);
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if (wl_list_empty(&seat->popup_grab.surfaces))
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weston_desktop_seat_popup_grab_end(seat);
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}
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WL_EXPORT void
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weston_seat_break_desktop_grabs(struct weston_seat *wseat)
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{
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struct weston_desktop_seat *seat = weston_desktop_seat_from_seat(wseat);
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weston_desktop_seat_popup_grab_end(seat);
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}
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