1 files changed, 177 insertions, 0 deletions
diff --git a/src/shell-window-preview.c b/src/shell-window-preview.c
new file mode 100644
index 0000000..47a11c5
--- /dev/null
+++ b/src/shell-window-preview.c
@@ -0,0 +1,177 @@
+#include "config.h"
+
+#include "shell-window-preview.h"
+
+enum
+{
+  PROP_0,
+
+  PROP_WINDOW_CONTAINER,
+
+  PROP_LAST
+};
+
+static GParamSpec *obj_props[PROP_LAST] = { NULL, };
+
+struct _ShellWindowPreview
+{
+  /*< private >*/
+  StWidget parent_instance;
+
+  ClutterActor *window_container;
+};
+
+G_DEFINE_TYPE (ShellWindowPreview, shell_window_preview, ST_TYPE_WIDGET);
+
+static void
+shell_window_preview_get_property (GObject      *gobject,
+                                   unsigned int  property_id,
+                                   GValue       *value,
+                                   GParamSpec   *pspec)
+{
+  ShellWindowPreview *self = SHELL_WINDOW_PREVIEW (gobject);
+
+  switch (property_id)
+    {
+    case PROP_WINDOW_CONTAINER:
+      g_value_set_object (value, self->window_container);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, property_id, pspec);
+    }
+}
+
+static void
+shell_window_preview_set_property (GObject      *gobject,
+                                   unsigned int  property_id,
+                                   const GValue *value,
+                                   GParamSpec   *pspec)
+{
+  ShellWindowPreview *self = SHELL_WINDOW_PREVIEW (gobject);
+
+  switch (property_id)
+    {
+    case PROP_WINDOW_CONTAINER:
+      if (g_set_object (&self->window_container, g_value_get_object (value)))
+        g_object_notify_by_pspec (gobject, obj_props[PROP_WINDOW_CONTAINER]);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, property_id, pspec);
+    }
+}
+
+static void
+shell_window_preview_get_preferred_width (ClutterActor *actor,
+                                          float         for_height,
+                                          float        *min_width_p,
+                                          float        *natural_width_p)
+{
+  ShellWindowPreview *self = SHELL_WINDOW_PREVIEW (actor);
+  StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (self));
+  float min_width, nat_width;
+
+  st_theme_node_adjust_for_height (theme_node, &for_height);
+
+  clutter_actor_get_preferred_width (self->window_container, for_height,
+                                     &min_width, &nat_width);
+
+  st_theme_node_adjust_preferred_width (theme_node, &min_width, &nat_width);
+
+  if (min_width_p)
+    *min_width_p = min_width;
+
+  if (natural_width_p)
+    *natural_width_p = nat_width;
+}
+
+static void
+shell_window_preview_get_preferred_height (ClutterActor *actor,
+                                           float         for_width,
+                                           float        *min_height_p,
+                                           float        *natural_height_p)
+{
+  ShellWindowPreview *self = SHELL_WINDOW_PREVIEW (actor);
+  StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (self));
+  float min_height, nat_height;
+
+  st_theme_node_adjust_for_width (theme_node, &for_width);
+
+  clutter_actor_get_preferred_height (self->window_container, for_width,
+                                      &min_height, &nat_height);
+
+  st_theme_node_adjust_preferred_height (theme_node, &min_height, &nat_height);
+
+  if (min_height_p)
+    *min_height_p = min_height;
+
+  if (natural_height_p)
+    *natural_height_p = nat_height;
+}
+
+static void
+shell_window_preview_allocate (ClutterActor          *actor,
+                               const ClutterActorBox *box)
+{
+  StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor));
+  ClutterActorBox content_box;
+  float x, y, max_width, max_height;
+  ClutterActorIter iter;
+  ClutterActor *child;
+
+  clutter_actor_set_allocation (actor, box);
+
+  st_theme_node_get_content_box (theme_node, box, &content_box);
+
+  clutter_actor_box_get_origin (&content_box, &x, &y);
+  clutter_actor_box_get_size (&content_box, &max_width, &max_height);
+
+  clutter_actor_iter_init (&iter, actor);
+  while (clutter_actor_iter_next (&iter, &child))
+    clutter_actor_allocate_available_size (child, x, y, max_width, max_height);
+}
+
+static void
+shell_window_preview_dispose (GObject *gobject)
+{
+  ShellWindowPreview *self = SHELL_WINDOW_PREVIEW (gobject);
+
+  g_clear_object (&self->window_container);
+
+  G_OBJECT_CLASS (shell_window_preview_parent_class)->dispose (gobject);
+}
+
+static void
+shell_window_preview_init (ShellWindowPreview *self)
+{
+}
+
+static void
+shell_window_preview_class_init (ShellWindowPreviewClass *klass)
+{
+  ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+  actor_class->get_preferred_width = shell_window_preview_get_preferred_width;
+  actor_class->get_preferred_height = shell_window_preview_get_preferred_height;
+  actor_class->allocate = shell_window_preview_allocate;
+
+  gobject_class->dispose = shell_window_preview_dispose;
+  gobject_class->get_property = shell_window_preview_get_property;
+  gobject_class->set_property = shell_window_preview_set_property;
+
+  /**
+   * ShellWindowPreview:window-container:
+   */
+  obj_props[PROP_WINDOW_CONTAINER] =
+    g_param_spec_object ("window-container",
+                         "window-container",
+                         "window-container",
+                         CLUTTER_TYPE_ACTOR,
+                         G_PARAM_READWRITE |
+                         G_PARAM_EXPLICIT_NOTIFY |
+                         G_PARAM_STATIC_STRINGS);
+
+  g_object_class_install_properties (gobject_class, PROP_LAST, obj_props);
+}