diff options
Diffstat (limited to 'src/shell-window-preview-layout.c')
| -rw-r--r-- | src/shell-window-preview-layout.c | 495 |
1 files changed, 495 insertions, 0 deletions
diff --git a/src/shell-window-preview-layout.c b/src/shell-window-preview-layout.c new file mode 100644 index 0000000..fa3cc1f --- /dev/null +++ b/src/shell-window-preview-layout.c @@ -0,0 +1,495 @@ +#include "config.h" + +#include <clutter/clutter.h> +#include <meta/window.h> +#include "shell-window-preview-layout.h" + +typedef struct _ShellWindowPreviewLayoutPrivate ShellWindowPreviewLayoutPrivate; +struct _ShellWindowPreviewLayoutPrivate +{ + ClutterActor *container; + GHashTable *windows; + + ClutterActorBox bounding_box; +}; + +enum +{ + PROP_0, + + PROP_BOUNDING_BOX, + + PROP_LAST +}; + +static GParamSpec *obj_props[PROP_LAST] = { NULL, }; + +G_DEFINE_TYPE_WITH_PRIVATE (ShellWindowPreviewLayout, shell_window_preview_layout, + CLUTTER_TYPE_LAYOUT_MANAGER); + +typedef struct _WindowInfo +{ + MetaWindow *window; + ClutterActor *window_actor; + + gulong size_changed_id; + gulong position_changed_id; + gulong window_actor_destroy_id; + gulong destroy_id; +} WindowInfo; + +static void +shell_window_preview_layout_get_property (GObject *object, + unsigned int property_id, + GValue *value, + GParamSpec *pspec) +{ + ShellWindowPreviewLayout *self = SHELL_WINDOW_PREVIEW_LAYOUT (object); + ShellWindowPreviewLayoutPrivate *priv; + + priv = shell_window_preview_layout_get_instance_private (self); + + switch (property_id) + { + case PROP_BOUNDING_BOX: + g_value_set_boxed (value, &priv->bounding_box); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + } +} + +static void +shell_window_preview_layout_set_container (ClutterLayoutManager *layout, + ClutterContainer *container) +{ + ShellWindowPreviewLayout *self = SHELL_WINDOW_PREVIEW_LAYOUT (layout); + ShellWindowPreviewLayoutPrivate *priv; + ClutterLayoutManagerClass *parent_class; + + priv = shell_window_preview_layout_get_instance_private (self); + + priv->container = CLUTTER_ACTOR (container); + + parent_class = CLUTTER_LAYOUT_MANAGER_CLASS (shell_window_preview_layout_parent_class); + parent_class->set_container (layout, container); +} + +static void +shell_window_preview_layout_get_preferred_width (ClutterLayoutManager *layout, + ClutterContainer *container, + float for_height, + float *min_width_p, + float *natural_width_p) +{ + ShellWindowPreviewLayout *self = SHELL_WINDOW_PREVIEW_LAYOUT (layout); + ShellWindowPreviewLayoutPrivate *priv; + + priv = shell_window_preview_layout_get_instance_private (self); + + if (min_width_p) + *min_width_p = 0; + + if (natural_width_p) + *natural_width_p = clutter_actor_box_get_width (&priv->bounding_box); +} + +static void +shell_window_preview_layout_get_preferred_height (ClutterLayoutManager *layout, + ClutterContainer *container, + float for_width, + float *min_height_p, + float *natural_height_p) +{ + ShellWindowPreviewLayout *self = SHELL_WINDOW_PREVIEW_LAYOUT (layout); + ShellWindowPreviewLayoutPrivate *priv; + + priv = shell_window_preview_layout_get_instance_private (self); + + if (min_height_p) + *min_height_p = 0; + + if (natural_height_p) + *natural_height_p = clutter_actor_box_get_height (&priv->bounding_box); +} + + +static void +shell_window_preview_layout_allocate (ClutterLayoutManager *layout, + ClutterContainer *container, + const ClutterActorBox *box) +{ + ShellWindowPreviewLayout *self = SHELL_WINDOW_PREVIEW_LAYOUT (layout); + ShellWindowPreviewLayoutPrivate *priv; + float scale_x, scale_y; + float bounding_box_width, bounding_box_height; + ClutterActorIter iter; + ClutterActor *child; + + priv = shell_window_preview_layout_get_instance_private (self); + + bounding_box_width = clutter_actor_box_get_width (&priv->bounding_box); + bounding_box_height = clutter_actor_box_get_height (&priv->bounding_box); + + if (bounding_box_width == 0) + scale_x = 1.f; + else + scale_x = clutter_actor_box_get_width (box) / bounding_box_width; + + if (bounding_box_height == 0) + scale_y = 1.f; + else + scale_y = clutter_actor_box_get_height (box) / bounding_box_height; + + clutter_actor_iter_init (&iter, CLUTTER_ACTOR (container)); + while (clutter_actor_iter_next (&iter, &child)) + { + ClutterActorBox child_box = { 0, }; + WindowInfo *window_info; + + if (!clutter_actor_is_visible (child)) + continue; + + window_info = g_hash_table_lookup (priv->windows, child); + + if (window_info) + { + MetaRectangle buffer_rect; + float child_nat_width, child_nat_height; + + meta_window_get_buffer_rect (window_info->window, &buffer_rect); + + clutter_actor_box_set_origin (&child_box, + buffer_rect.x - priv->bounding_box.x1, + buffer_rect.y - priv->bounding_box.y1); + + clutter_actor_get_preferred_size (child, NULL, NULL, + &child_nat_width, &child_nat_height); + + clutter_actor_box_set_size (&child_box, child_nat_width, child_nat_height); + + child_box.x1 *= scale_x; + child_box.x2 *= scale_x; + child_box.y1 *= scale_y; + child_box.y2 *= scale_y; + + clutter_actor_allocate (child, &child_box); + } + else + { + float x, y; + + clutter_actor_get_fixed_position (child, &x, &y); + clutter_actor_allocate_preferred_size (child, x, y); + } + } +} + +static void +on_layout_changed (ShellWindowPreviewLayout *self) +{ + ShellWindowPreviewLayoutPrivate *priv; + GHashTableIter iter; + gpointer value; + gboolean first_rect = TRUE; + MetaRectangle bounding_rect = { 0, }; + ClutterActorBox old_bounding_box; + + priv = shell_window_preview_layout_get_instance_private (self); + + old_bounding_box = + (ClutterActorBox) CLUTTER_ACTOR_BOX_INIT (priv->bounding_box.x1, + priv->bounding_box.y1, + priv->bounding_box.x2, + priv->bounding_box.y2); + + g_hash_table_iter_init (&iter, priv->windows); + while (g_hash_table_iter_next (&iter, NULL, &value)) + { + WindowInfo *window_info = value; + MetaRectangle frame_rect; + + meta_window_get_frame_rect (window_info->window, &frame_rect); + + if (first_rect) + { + bounding_rect = frame_rect; + first_rect = FALSE; + continue; + } + + meta_rectangle_union (&frame_rect, &bounding_rect, &bounding_rect); + } + + clutter_actor_box_set_origin (&priv->bounding_box, + (float) bounding_rect.x, + (float) bounding_rect.y); + clutter_actor_box_set_size (&priv->bounding_box, + (float) bounding_rect.width, + (float) bounding_rect.height); + + if (!clutter_actor_box_equal (&priv->bounding_box, &old_bounding_box)) + g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_BOUNDING_BOX]); + + clutter_layout_manager_layout_changed (CLUTTER_LAYOUT_MANAGER (self)); +} + +static void +on_window_size_position_changed (MetaWindow *window, + ShellWindowPreviewLayout *self) +{ + on_layout_changed (self); +} + +static void +on_window_destroyed (ClutterActor *actor) +{ + clutter_actor_destroy (actor); +} + +static void +on_actor_destroyed (ClutterActor *actor, + ShellWindowPreviewLayout *self) +{ + ShellWindowPreviewLayoutPrivate *priv; + WindowInfo *window_info; + + priv = shell_window_preview_layout_get_instance_private (self); + + window_info = g_hash_table_lookup (priv->windows, actor); + g_assert (window_info != NULL); + + shell_window_preview_layout_remove_window (self, window_info->window); +} + +static void +shell_window_preview_layout_dispose (GObject *gobject) +{ + ShellWindowPreviewLayout *self = SHELL_WINDOW_PREVIEW_LAYOUT (gobject); + ShellWindowPreviewLayoutPrivate *priv; + GHashTableIter iter; + gpointer key, value; + + priv = shell_window_preview_layout_get_instance_private (self); + + g_hash_table_iter_init (&iter, priv->windows); + while (g_hash_table_iter_next (&iter, &key, &value)) + { + ClutterActor *actor = key; + WindowInfo *info = value; + + g_clear_signal_handler (&info->size_changed_id, info->window); + g_clear_signal_handler (&info->position_changed_id, info->window); + g_clear_signal_handler (&info->window_actor_destroy_id, info->window_actor); + g_clear_signal_handler (&info->destroy_id, actor); + + clutter_actor_remove_child (priv->container, actor); + } + + g_hash_table_remove_all (priv->windows); + + G_OBJECT_CLASS (shell_window_preview_layout_parent_class)->dispose (gobject); +} + +static void +shell_window_preview_layout_finalize (GObject *gobject) +{ + ShellWindowPreviewLayout *self = SHELL_WINDOW_PREVIEW_LAYOUT (gobject); + ShellWindowPreviewLayoutPrivate *priv; + + priv = shell_window_preview_layout_get_instance_private (self); + + g_hash_table_destroy (priv->windows); + + G_OBJECT_CLASS (shell_window_preview_layout_parent_class)->finalize (gobject); +} + +static void +shell_window_preview_layout_init (ShellWindowPreviewLayout *self) +{ + ShellWindowPreviewLayoutPrivate *priv; + + priv = shell_window_preview_layout_get_instance_private (self); + + priv->windows = g_hash_table_new_full (NULL, NULL, NULL, + (GDestroyNotify) g_free); +} + +static void +shell_window_preview_layout_class_init (ShellWindowPreviewLayoutClass *klass) +{ + ClutterLayoutManagerClass *layout_class = CLUTTER_LAYOUT_MANAGER_CLASS (klass); + GObjectClass *gobject_class = G_OBJECT_CLASS (klass); + + layout_class->get_preferred_width = shell_window_preview_layout_get_preferred_width; + layout_class->get_preferred_height = shell_window_preview_layout_get_preferred_height; + layout_class->allocate = shell_window_preview_layout_allocate; + layout_class->set_container = shell_window_preview_layout_set_container; + + gobject_class->dispose = shell_window_preview_layout_dispose; + gobject_class->finalize = shell_window_preview_layout_finalize; + gobject_class->get_property = shell_window_preview_layout_get_property; + + /** + * ShellWindowPreviewLayout:bounding-box: + */ + obj_props[PROP_BOUNDING_BOX] = + g_param_spec_boxed ("bounding-box", + "Bounding Box", + "Bounding Box", + CLUTTER_TYPE_ACTOR_BOX, + G_PARAM_READABLE | + G_PARAM_STATIC_STRINGS); + + g_object_class_install_properties (gobject_class, PROP_LAST, obj_props); +} + +/** + * shell_window_preview_layout_add_window: + * @self: a #ShellWindowPreviewLayout + * @window: the #MetaWindow + * + * Creates a ClutterActor drawing the texture of @window and adds it + * to the container. If @window is already part of the preview, this + * function will do nothing. + * + * Returns: (nullable) (transfer none): The newly created actor drawing @window + */ +ClutterActor * +shell_window_preview_layout_add_window (ShellWindowPreviewLayout *self, + MetaWindow *window) +{ + ShellWindowPreviewLayoutPrivate *priv; + ClutterActor *window_actor, *actor; + WindowInfo *window_info; + GHashTableIter iter; + gpointer value; + + g_return_val_if_fail (SHELL_IS_WINDOW_PREVIEW_LAYOUT (self), NULL); + g_return_val_if_fail (META_IS_WINDOW (window), NULL); + + priv = shell_window_preview_layout_get_instance_private (self); + + g_hash_table_iter_init (&iter, priv->windows); + while (g_hash_table_iter_next (&iter, NULL, &value)) + { + WindowInfo *info = value; + + if (info->window == window) + return NULL; + } + + window_actor = CLUTTER_ACTOR (meta_window_get_compositor_private (window)); + actor = clutter_clone_new (window_actor); + + window_info = g_new0 (WindowInfo, 1); + + window_info->window = window; + window_info->window_actor = window_actor; + window_info->size_changed_id = + g_signal_connect (window, "size-changed", + G_CALLBACK (on_window_size_position_changed), self); + window_info->position_changed_id = + g_signal_connect (window, "position-changed", + G_CALLBACK (on_window_size_position_changed), self); + window_info->window_actor_destroy_id = + g_signal_connect_swapped (window_actor, "destroy", + G_CALLBACK (on_window_destroyed), actor); + window_info->destroy_id = + g_signal_connect (actor, "destroy", + G_CALLBACK (on_actor_destroyed), self); + + g_hash_table_insert (priv->windows, actor, window_info); + + clutter_actor_add_child (priv->container, actor); + + on_layout_changed (self); + + return actor; +} + +/** + * shell_window_preview_layout_remove_window: + * @self: a #ShellWindowPreviewLayout + * @window: the #MetaWindow + * + * Removes a MetaWindow @window from the preview which has been added + * previously using shell_window_preview_layout_add_window(). + * If @window is not part of preview, this function will do nothing. + */ +void +shell_window_preview_layout_remove_window (ShellWindowPreviewLayout *self, + MetaWindow *window) +{ + ShellWindowPreviewLayoutPrivate *priv; + ClutterActor *actor; + WindowInfo *window_info = NULL; + GHashTableIter iter; + gpointer key, value; + + g_return_if_fail (SHELL_IS_WINDOW_PREVIEW_LAYOUT (self)); + g_return_if_fail (META_IS_WINDOW (window)); + + priv = shell_window_preview_layout_get_instance_private (self); + + g_hash_table_iter_init (&iter, priv->windows); + while (g_hash_table_iter_next (&iter, &key, &value)) + { + WindowInfo *info = value; + + if (info->window == window) + { + actor = CLUTTER_ACTOR (key); + window_info = info; + break; + } + } + + if (window_info == NULL) + return; + + g_clear_signal_handler (&window_info->size_changed_id, window); + g_clear_signal_handler (&window_info->position_changed_id, window); + g_clear_signal_handler (&window_info->window_actor_destroy_id, window_info->window_actor); + g_clear_signal_handler (&window_info->destroy_id, actor); + + g_hash_table_remove (priv->windows, actor); + + clutter_actor_remove_child (priv->container, actor); + + on_layout_changed (self); +} + +/** + * shell_window_preview_layout_get_windows: + * @self: a #ShellWindowPreviewLayout + * + * Gets an array of all MetaWindows that were added to the layout + * using shell_window_preview_layout_add_window(), ordered by the + * insertion order. + * + * Returns: (transfer container) (element-type Meta.Window): The list of windows + */ +GList * +shell_window_preview_layout_get_windows (ShellWindowPreviewLayout *self) +{ + ShellWindowPreviewLayoutPrivate *priv; + GList *windows = NULL; + GHashTableIter iter; + gpointer value; + + g_return_val_if_fail (SHELL_IS_WINDOW_PREVIEW_LAYOUT (self), NULL); + + priv = shell_window_preview_layout_get_instance_private (self); + + g_hash_table_iter_init (&iter, priv->windows); + while (g_hash_table_iter_next (&iter, NULL, &value)) + { + WindowInfo *window_info = value; + + windows = g_list_prepend (windows, window_info->window); + } + + return windows; +} |