1 files changed, 248 insertions, 0 deletions
diff --git a/src/shell-embedded-window.c b/src/shell-embedded-window.c
new file mode 100644
index 0000000..31e3506
--- /dev/null
+++ b/src/shell-embedded-window.c
@@ -0,0 +1,248 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+#include "config.h"
+
+#include <gdk/gdkx.h>
+#include <clutter/x11/clutter-x11.h>
+
+#include "shell-embedded-window-private.h"
+
+/* This type is a subclass of GtkWindow that ties the window to a
+ * ShellGtkEmbed; the resizing logic is bound to the clutter logic.
+ *
+ * The typical usage we might expect is
+ *
+ *  - ShellEmbeddedWindow is created and filled with content
+ *  - ShellEmbeddedWindow is shown with gtk_widget_show_all()
+ *  - ShellGtkEmbed is created for the ShellEmbeddedWindow
+ *  - actor is added to a stage
+ *
+ * The way it works is that the GtkWindow is mapped if and only if both:
+ *
+ * - gtk_widget_visible (window) [widget has been shown]
+ * - Actor is mapped [actor and all parents visible, actor in stage]
+ */
+
+enum {
+   PROP_0
+};
+
+typedef struct _ShellEmbeddedWindowPrivate ShellEmbeddedWindowPrivate;
+
+struct _ShellEmbeddedWindowPrivate {
+  ShellGtkEmbed *actor;
+
+  GdkRectangle position;
+};
+
+G_DEFINE_TYPE_WITH_PRIVATE (ShellEmbeddedWindow,
+                            shell_embedded_window,
+                            GTK_TYPE_WINDOW);
+
+/*
+ * The normal gtk_window_show() starts all of the complicated asynchronous
+ * window resizing code running; we don't want or need any of that.
+ * Bypassing the normal code does mean that the extra geometry management
+ * available on GtkWindow: gridding, maximum sizes, etc, is ignored; we
+ * don't really want that anyways - we just want a way of embedding a
+ * GtkWidget into a Clutter stage.
+ */
+static void
+shell_embedded_window_show (GtkWidget *widget)
+{
+  ShellEmbeddedWindow *window = SHELL_EMBEDDED_WINDOW (widget);
+  ShellEmbeddedWindowPrivate *priv;
+  GtkWidgetClass *widget_class;
+
+  priv = shell_embedded_window_get_instance_private (window);
+
+  /* Skip GtkWindow, but run the default GtkWidget handling which
+   * marks the widget visible */
+  widget_class = g_type_class_peek (GTK_TYPE_WIDGET);
+  widget_class->show (widget);
+
+  if (priv->actor)
+    {
+      /* Size is 0x0 if the GtkWindow is not shown */
+      clutter_actor_queue_relayout (CLUTTER_ACTOR (priv->actor));
+
+      if (clutter_actor_is_realized (CLUTTER_ACTOR (priv->actor)))
+        gtk_widget_map (widget);
+    }
+}
+
+static void
+shell_embedded_window_hide (GtkWidget *widget)
+{
+  ShellEmbeddedWindow *window = SHELL_EMBEDDED_WINDOW (widget);
+  ShellEmbeddedWindowPrivate *priv;
+
+  priv = shell_embedded_window_get_instance_private (window);
+
+  if (priv->actor)
+    clutter_actor_queue_relayout (CLUTTER_ACTOR (priv->actor));
+
+  GTK_WIDGET_CLASS (shell_embedded_window_parent_class)->hide (widget);
+}
+
+static gboolean
+shell_embedded_window_configure_event (GtkWidget         *widget,
+                                       GdkEventConfigure *event)
+{
+  /* Normally a configure event coming back from X triggers the
+   * resizing logic inside GtkWindow; we just ignore them
+   * since we are handling the resizing logic separately.
+   */
+  return FALSE;
+}
+
+static void
+shell_embedded_window_check_resize (GtkContainer *container)
+{
+  ShellEmbeddedWindow *window = SHELL_EMBEDDED_WINDOW (container);
+  ShellEmbeddedWindowPrivate *priv;
+
+  priv = shell_embedded_window_get_instance_private (window);
+
+  /* Check resize is called when a resize is queued on something
+   * inside the GtkWindow; we need to make sure that in response
+   * to this gtk_widget_size_request() and then
+   * gtk_widget_size_allocate() are called; we defer to the Clutter
+   * logic and assume it will do the right thing.
+   */
+  if (priv->actor)
+    clutter_actor_queue_relayout (CLUTTER_ACTOR (priv->actor));
+}
+
+static GObject *
+shell_embedded_window_constructor (GType                  gtype,
+                                   guint                  n_properties,
+                                   GObjectConstructParam *properties)
+{
+  GObject *object;
+  GObjectClass *parent_class;
+
+  parent_class = G_OBJECT_CLASS (shell_embedded_window_parent_class);
+  object = parent_class->constructor (gtype, n_properties, properties);
+
+  /* Setting the resize mode to immediate means that calling queue_resize()
+   * on a widget within the window will immediately call check_resize()
+   * to be called, instead of having it queued to an idle. From our perspective,
+   * this is ideal since we just are going to queue a resize to Clutter's
+   * idle resize anyways.
+   */
+  g_object_set (object,
+                "app-paintable", TRUE,
+                "resize-mode", GTK_RESIZE_IMMEDIATE,
+                "type", GTK_WINDOW_POPUP,
+                NULL);
+
+  return object;
+}
+
+static void
+shell_embedded_window_class_init (ShellEmbeddedWindowClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+  GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
+
+  object_class->constructor     = shell_embedded_window_constructor;
+
+  widget_class->show            = shell_embedded_window_show;
+  widget_class->hide            = shell_embedded_window_hide;
+  widget_class->configure_event = shell_embedded_window_configure_event;
+
+  container_class->check_resize    = shell_embedded_window_check_resize;
+}
+
+static void
+shell_embedded_window_init (ShellEmbeddedWindow *window)
+{
+}
+
+/*
+ * Private routines called by ShellGtkEmbed
+ */
+
+void
+_shell_embedded_window_set_actor (ShellEmbeddedWindow  *window,
+                                  ShellGtkEmbed        *actor)
+
+{
+  ShellEmbeddedWindowPrivate *priv;
+
+  g_return_if_fail (SHELL_IS_EMBEDDED_WINDOW (window));
+
+  priv = shell_embedded_window_get_instance_private (window);
+  priv->actor = actor;
+
+  if (actor &&
+      clutter_actor_is_mapped (CLUTTER_ACTOR (actor)) &&
+      gtk_widget_get_visible (GTK_WIDGET (window)))
+    gtk_widget_map (GTK_WIDGET (window));
+}
+
+void
+_shell_embedded_window_allocate (ShellEmbeddedWindow *window,
+                                 int                  x,
+                                 int                  y,
+                                 int                  width,
+                                 int                  height)
+{
+  ShellEmbeddedWindowPrivate *priv;
+  GtkAllocation allocation;
+
+  g_return_if_fail (SHELL_IS_EMBEDDED_WINDOW (window));
+
+  priv = shell_embedded_window_get_instance_private (window);
+
+  if (priv->position.x == x &&
+      priv->position.y == y &&
+      priv->position.width == width &&
+      priv->position.height == height)
+    return;
+
+  priv->position.x = x;
+  priv->position.y = y;
+  priv->position.width = width;
+  priv->position.height = height;
+
+  if (gtk_widget_get_realized (GTK_WIDGET (window)))
+    gdk_window_move_resize (gtk_widget_get_window (GTK_WIDGET (window)),
+                            x, y, width, height);
+
+  allocation.x = 0;
+  allocation.y = 0;
+  allocation.width = width;
+  allocation.height = height;
+
+  gtk_widget_size_allocate (GTK_WIDGET (window), &allocation);
+}
+
+void
+_shell_embedded_window_map (ShellEmbeddedWindow *window)
+{
+  g_return_if_fail (SHELL_IS_EMBEDDED_WINDOW (window));
+
+  if (gtk_widget_get_visible (GTK_WIDGET (window)))
+    gtk_widget_map (GTK_WIDGET (window));
+}
+
+void
+_shell_embedded_window_unmap (ShellEmbeddedWindow *window)
+{
+  g_return_if_fail (SHELL_IS_EMBEDDED_WINDOW (window));
+
+  gtk_widget_unmap (GTK_WIDGET (window));
+}
+
+/*
+ * Public API
+ */
+GtkWidget *
+shell_embedded_window_new (void)
+{
+  return g_object_new (SHELL_TYPE_EMBEDDED_WINDOW,
+                       NULL);
+}