Adding upstream version 43.9.upstream/43.9upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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;
+}