weston/desktop-shell/exposay.c
2013-12-04 10:20:02 -08:00

605 lines
18 KiB
C

/*
* Copyright © 2010-2012 Intel Corporation
* Copyright © 2011-2012 Collabora, Ltd.
* Copyright © 2013 Raspberry Pi Foundation
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#include <linux/input.h>
#include "shell.h"
struct exposay_surface {
struct desktop_shell *shell;
struct weston_surface *surface;
struct weston_view *view;
struct wl_list link;
int x;
int y;
int width;
int height;
double scale;
int row;
int column;
/* The animations only apply a transformation for their own lifetime,
* and don't have an option to indefinitely maintain the
* transformation in a steady state - so, we apply our own once the
* animation has finished. */
struct weston_transform transform;
};
static void exposay_set_state(struct desktop_shell *shell,
enum exposay_target_state state,
struct weston_seat *seat);
static void exposay_check_state(struct desktop_shell *shell);
static void
exposay_in_flight_inc(struct desktop_shell *shell)
{
shell->exposay.in_flight++;
}
static void
exposay_in_flight_dec(struct desktop_shell *shell)
{
if (--shell->exposay.in_flight > 0)
return;
exposay_check_state(shell);
}
static void
exposay_animate_in_done(struct weston_view_animation *animation, void *data)
{
struct exposay_surface *esurface = data;
wl_list_insert(&esurface->view->geometry.transformation_list,
&esurface->transform.link);
weston_matrix_init(&esurface->transform.matrix);
weston_matrix_scale(&esurface->transform.matrix,
esurface->scale, esurface->scale, 1.0f);
weston_matrix_translate(&esurface->transform.matrix,
esurface->x - esurface->view->geometry.x,
esurface->y - esurface->view->geometry.y,
0);
weston_view_geometry_dirty(esurface->view);
weston_compositor_schedule_repaint(esurface->view->surface->compositor);
exposay_in_flight_dec(esurface->shell);
}
static void
exposay_animate_in(struct exposay_surface *esurface)
{
exposay_in_flight_inc(esurface->shell);
weston_move_scale_run(esurface->view,
esurface->x - esurface->view->geometry.x,
esurface->y - esurface->view->geometry.y,
1.0, esurface->scale, 0,
exposay_animate_in_done, esurface);
}
static void
exposay_animate_out_done(struct weston_view_animation *animation, void *data)
{
struct exposay_surface *esurface = data;
struct desktop_shell *shell = esurface->shell;
wl_list_remove(&esurface->link);
free(esurface);
exposay_in_flight_dec(shell);
}
static void
exposay_animate_out(struct exposay_surface *esurface)
{
exposay_in_flight_inc(esurface->shell);
/* Remove the static transformation set up by
* exposay_transform_in_done(). */
wl_list_remove(&esurface->transform.link);
weston_view_geometry_dirty(esurface->view);
weston_move_scale_run(esurface->view,
esurface->x - esurface->view->geometry.x,
esurface->y - esurface->view->geometry.y,
1.0, esurface->scale, 1,
exposay_animate_out_done, esurface);
}
static void
exposay_highlight_surface(struct desktop_shell *shell,
struct exposay_surface *esurface)
{
struct weston_view *view = NULL;
if (esurface) {
shell->exposay.row_current = esurface->row;
shell->exposay.column_current = esurface->column;
view = esurface->view;
}
activate(shell, view->surface, shell->exposay.seat);
shell->exposay.focus_current = view;
}
static int
exposay_is_animating(struct desktop_shell *shell)
{
if (shell->exposay.state_cur == EXPOSAY_LAYOUT_INACTIVE ||
shell->exposay.state_cur == EXPOSAY_LAYOUT_OVERVIEW)
return 0;
return (shell->exposay.in_flight > 0);
}
static void
exposay_pick(struct desktop_shell *shell, int x, int y)
{
struct exposay_surface *esurface;
if (exposay_is_animating(shell))
return;
wl_list_for_each(esurface, &shell->exposay.surface_list, link) {
if (x < esurface->x || x > esurface->x + esurface->width)
continue;
if (y < esurface->y || y > esurface->y + esurface->height)
continue;
exposay_highlight_surface(shell, esurface);
return;
}
}
/* Pretty lame layout for now; just tries to make a square. Should take
* aspect ratio into account really. Also needs to be notified of surface
* addition and removal and adjust layout/animate accordingly. */
static enum exposay_layout_state
exposay_layout(struct desktop_shell *shell)
{
struct workspace *workspace = shell->exposay.workspace;
struct weston_compositor *compositor = shell->compositor;
struct weston_output *output = get_default_output(compositor);
struct weston_view *view;
struct exposay_surface *esurface;
int w, h;
int i;
int last_row_removed = 0;
wl_list_init(&shell->exposay.surface_list);
shell->exposay.num_surfaces = 0;
wl_list_for_each(view, &workspace->layer.view_list, layer_link) {
if (!get_shell_surface(view->surface))
continue;
shell->exposay.num_surfaces++;
}
if (shell->exposay.num_surfaces == 0) {
shell->exposay.grid_size = 0;
shell->exposay.hpadding_outer = 0;
shell->exposay.vpadding_outer = 0;
shell->exposay.padding_inner = 0;
shell->exposay.surface_size = 0;
return EXPOSAY_LAYOUT_OVERVIEW;
}
/* Lay the grid out as square as possible, losing surfaces from the
* bottom row if required. Start with fixed padding of a 10% margin
* around the outside and 80px internal padding between surfaces, and
* maximise the area made available to surfaces after this, but only
* to a maximum of 1/3rd the total output size.
*
* If we can't make a square grid, add one extra row at the bottom
* which will have a smaller number of columns.
*
* XXX: Surely there has to be a better way to express this maths,
* right?!
*/
shell->exposay.grid_size = floor(sqrtf(shell->exposay.num_surfaces));
if (pow(shell->exposay.grid_size, 2) != shell->exposay.num_surfaces)
shell->exposay.grid_size++;
last_row_removed = pow(shell->exposay.grid_size, 2) - shell->exposay.num_surfaces;
shell->exposay.hpadding_outer = (output->width / 10);
shell->exposay.vpadding_outer = (output->height / 10);
shell->exposay.padding_inner = 80;
w = output->width - (shell->exposay.hpadding_outer * 2);
w -= shell->exposay.padding_inner * (shell->exposay.grid_size - 1);
w /= shell->exposay.grid_size;
h = output->height - (shell->exposay.vpadding_outer * 2);
h -= shell->exposay.padding_inner * (shell->exposay.grid_size - 1);
h /= shell->exposay.grid_size;
shell->exposay.surface_size = (w < h) ? w : h;
if (shell->exposay.surface_size > (output->width / 2))
shell->exposay.surface_size = output->width / 2;
if (shell->exposay.surface_size > (output->height / 2))
shell->exposay.surface_size = output->height / 2;
i = 0;
wl_list_for_each(view, &workspace->layer.view_list, layer_link) {
int pad;
pad = shell->exposay.surface_size + shell->exposay.padding_inner;
if (!get_shell_surface(view->surface))
continue;
esurface = malloc(sizeof(*esurface));
if (!esurface) {
exposay_set_state(shell, EXPOSAY_TARGET_CANCEL,
shell->exposay.seat);
break;
}
wl_list_insert(&shell->exposay.surface_list, &esurface->link);
esurface->shell = shell;
esurface->view = view;
esurface->row = i / shell->exposay.grid_size;
esurface->column = i % shell->exposay.grid_size;
esurface->x = shell->exposay.hpadding_outer;
esurface->x += pad * esurface->column;
esurface->y = shell->exposay.vpadding_outer;
esurface->y += pad * esurface->row;
if (esurface->row == shell->exposay.grid_size - 1)
esurface->x += (shell->exposay.surface_size + shell->exposay.padding_inner) * last_row_removed / 2;
if (view->surface->width > view->surface->height)
esurface->scale = shell->exposay.surface_size / (float) view->surface->width;
else
esurface->scale = shell->exposay.surface_size / (float) view->surface->height;
esurface->width = view->surface->width * esurface->scale;
esurface->height = view->surface->height * esurface->scale;
if (shell->exposay.focus_current == esurface->view)
exposay_highlight_surface(shell, esurface);
exposay_animate_in(esurface);
i++;
}
weston_compositor_schedule_repaint(shell->compositor);
return EXPOSAY_LAYOUT_ANIMATE_TO_OVERVIEW;
}
static void
exposay_focus(struct weston_pointer_grab *grab)
{
}
static void
exposay_motion(struct weston_pointer_grab *grab, uint32_t time,
wl_fixed_t x, wl_fixed_t y)
{
struct desktop_shell *shell =
container_of(grab, struct desktop_shell, exposay.grab_ptr);
weston_pointer_move(grab->pointer, x, y);
exposay_pick(shell,
wl_fixed_to_int(grab->pointer->x),
wl_fixed_to_int(grab->pointer->y));
}
static void
exposay_button(struct weston_pointer_grab *grab, uint32_t time, uint32_t button,
uint32_t state_w)
{
struct desktop_shell *shell =
container_of(grab, struct desktop_shell, exposay.grab_ptr);
struct weston_seat *seat = grab->pointer->seat;
enum wl_pointer_button_state state = state_w;
if (button != BTN_LEFT)
return;
/* Store the surface we clicked on, and don't do anything if we end up
* releasing on a different surface. */
if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
shell->exposay.clicked = shell->exposay.focus_current;
return;
}
if (shell->exposay.focus_current == shell->exposay.clicked)
exposay_set_state(shell, EXPOSAY_TARGET_SWITCH, seat);
else
shell->exposay.clicked = NULL;
}
static void
exposay_pointer_grab_cancel(struct weston_pointer_grab *grab)
{
struct desktop_shell *shell =
container_of(grab, struct desktop_shell, exposay.grab_ptr);
exposay_set_state(shell, EXPOSAY_TARGET_CANCEL, shell->exposay.seat);
}
static const struct weston_pointer_grab_interface exposay_ptr_grab = {
exposay_focus,
exposay_motion,
exposay_button,
exposay_pointer_grab_cancel,
};
static int
exposay_maybe_move(struct desktop_shell *shell, int row, int column)
{
struct exposay_surface *esurface;
wl_list_for_each(esurface, &shell->exposay.surface_list, link) {
if (esurface->row != row || esurface->column != column)
continue;
exposay_highlight_surface(shell, esurface);
return 1;
}
return 0;
}
static void
exposay_key(struct weston_keyboard_grab *grab, uint32_t time, uint32_t key,
uint32_t state_w)
{
struct weston_seat *seat = grab->keyboard->seat;
struct desktop_shell *shell =
container_of(grab, struct desktop_shell, exposay.grab_kbd);
enum wl_keyboard_key_state state = state_w;
if (state != WL_KEYBOARD_KEY_STATE_RELEASED)
return;
switch (key) {
case KEY_ESC:
exposay_set_state(shell, EXPOSAY_TARGET_CANCEL, seat);
break;
case KEY_ENTER:
exposay_set_state(shell, EXPOSAY_TARGET_SWITCH, seat);
break;
case KEY_UP:
exposay_maybe_move(shell, shell->exposay.row_current - 1,
shell->exposay.column_current);
break;
case KEY_DOWN:
/* Special case for trying to move to the bottom row when it
* has fewer items than all the others. */
if (!exposay_maybe_move(shell, shell->exposay.row_current + 1,
shell->exposay.column_current) &&
shell->exposay.row_current < (shell->exposay.grid_size - 1)) {
exposay_maybe_move(shell, shell->exposay.row_current + 1,
(shell->exposay.num_surfaces %
shell->exposay.grid_size) - 1);
}
break;
case KEY_LEFT:
exposay_maybe_move(shell, shell->exposay.row_current,
shell->exposay.column_current - 1);
break;
case KEY_RIGHT:
exposay_maybe_move(shell, shell->exposay.row_current,
shell->exposay.column_current + 1);
break;
case KEY_TAB:
/* Try to move right, then down (and to the leftmost column),
* then if all else fails, to the top left. */
if (!exposay_maybe_move(shell, shell->exposay.row_current,
shell->exposay.column_current + 1) &&
!exposay_maybe_move(shell, shell->exposay.row_current + 1, 0))
exposay_maybe_move(shell, 0, 0);
break;
default:
break;
}
}
static void
exposay_modifier(struct weston_keyboard_grab *grab, uint32_t serial,
uint32_t mods_depressed, uint32_t mods_latched,
uint32_t mods_locked, uint32_t group)
{
struct desktop_shell *shell =
container_of(grab, struct desktop_shell, exposay.grab_kbd);
struct weston_seat *seat = (struct weston_seat *) grab->keyboard->seat;
/* We want to know when mod has been pressed and released.
* FIXME: There is a problem here: if mod is pressed, then a key
* is pressed and released, then mod is released, we will treat that
* as if only mod had been pressed and released. */
if (seat->modifier_state) {
if (seat->modifier_state == shell->binding_modifier) {
shell->exposay.mod_pressed = true;
} else {
shell->exposay.mod_invalid = true;
}
} else {
if (shell->exposay.mod_pressed && !shell->exposay.mod_invalid)
exposay_set_state(shell, EXPOSAY_TARGET_CANCEL, seat);
shell->exposay.mod_invalid = false;
shell->exposay.mod_pressed = false;
}
return;
}
static void
exposay_cancel(struct weston_keyboard_grab *grab)
{
struct desktop_shell *shell =
container_of(grab, struct desktop_shell, exposay.grab_kbd);
exposay_set_state(shell, EXPOSAY_TARGET_CANCEL, shell->exposay.seat);
}
static const struct weston_keyboard_grab_interface exposay_kbd_grab = {
exposay_key,
exposay_modifier,
exposay_cancel,
};
/**
* Called when the transition from overview -> inactive has completed.
*/
static enum exposay_layout_state
exposay_set_inactive(struct desktop_shell *shell)
{
struct weston_seat *seat = shell->exposay.seat;
weston_keyboard_end_grab(seat->keyboard);
weston_pointer_end_grab(seat->pointer);
if (seat->keyboard->input_method_resource)
seat->keyboard->grab = &seat->keyboard->input_method_grab;
return EXPOSAY_LAYOUT_INACTIVE;
}
/**
* Begins the transition from overview to inactive. */
static enum exposay_layout_state
exposay_transition_inactive(struct desktop_shell *shell, int switch_focus)
{
struct exposay_surface *esurface;
/* Call activate() before we start the animations to avoid
* animating back the old state and then immediately transitioning
* to the new. */
if (switch_focus && shell->exposay.focus_current)
activate(shell, shell->exposay.focus_current->surface,
shell->exposay.seat);
else if (shell->exposay.focus_prev)
activate(shell, shell->exposay.focus_prev->surface,
shell->exposay.seat);
wl_list_for_each(esurface, &shell->exposay.surface_list, link)
exposay_animate_out(esurface);
weston_compositor_schedule_repaint(shell->compositor);
return EXPOSAY_LAYOUT_ANIMATE_TO_INACTIVE;
}
static enum exposay_layout_state
exposay_transition_active(struct desktop_shell *shell)
{
struct weston_seat *seat = shell->exposay.seat;
shell->exposay.workspace = get_current_workspace(shell);
shell->exposay.focus_prev = get_default_view (seat->keyboard->focus);
shell->exposay.focus_current = get_default_view (seat->keyboard->focus);
shell->exposay.clicked = NULL;
wl_list_init(&shell->exposay.surface_list);
lower_fullscreen_layer(shell);
shell->exposay.grab_kbd.interface = &exposay_kbd_grab;
weston_keyboard_start_grab(seat->keyboard,
&shell->exposay.grab_kbd);
weston_keyboard_set_focus(seat->keyboard, NULL);
shell->exposay.grab_ptr.interface = &exposay_ptr_grab;
weston_pointer_start_grab(seat->pointer,
&shell->exposay.grab_ptr);
weston_pointer_set_focus(seat->pointer, NULL,
seat->pointer->x, seat->pointer->y);
return exposay_layout(shell);
}
static void
exposay_check_state(struct desktop_shell *shell)
{
enum exposay_layout_state state_new = shell->exposay.state_cur;
int do_switch = 0;
/* Don't do anything whilst animations are running, just store up
* target state changes and only act on them when the animations have
* completed. */
if (exposay_is_animating(shell))
return;
switch (shell->exposay.state_target) {
case EXPOSAY_TARGET_OVERVIEW:
switch (shell->exposay.state_cur) {
case EXPOSAY_LAYOUT_OVERVIEW:
goto out;
case EXPOSAY_LAYOUT_ANIMATE_TO_OVERVIEW:
state_new = EXPOSAY_LAYOUT_OVERVIEW;
break;
default:
state_new = exposay_transition_active(shell);
break;
}
break;
case EXPOSAY_TARGET_SWITCH:
do_switch = 1; /* fallthrough */
case EXPOSAY_TARGET_CANCEL:
switch (shell->exposay.state_cur) {
case EXPOSAY_LAYOUT_INACTIVE:
goto out;
case EXPOSAY_LAYOUT_ANIMATE_TO_INACTIVE:
state_new = exposay_set_inactive(shell);
break;
default:
state_new = exposay_transition_inactive(shell, do_switch);
break;
}
break;
}
out:
shell->exposay.state_cur = state_new;
}
static void
exposay_set_state(struct desktop_shell *shell, enum exposay_target_state state,
struct weston_seat *seat)
{
shell->exposay.state_target = state;
shell->exposay.seat = seat;
exposay_check_state(shell);
}
void
exposay_binding(struct weston_seat *seat, enum weston_keyboard_modifier modifier,
void *data)
{
struct desktop_shell *shell = data;
exposay_set_state(shell, EXPOSAY_TARGET_OVERVIEW, seat);
}