desktop-shell: Split out exposay immplementation
diff --git a/desktop-shell/exposay.c b/desktop-shell/exposay.c
new file mode 100644
index 0000000..81da00a
--- /dev/null
+++ b/desktop-shell/exposay.c
@@ -0,0 +1,604 @@
+/*
+ * 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);
+}