[gtk+/wip/otte/snapshot: 9/30] container: Add snapshot() implementation

[Benjamin Otte <otte src gnome org>]

commit 706215912a49c9063390baf2af925f80e73de1ac
Author: Benjamin Otte <otte redhat com>
Date:   Sun Nov 13 16:50:24 2016 +0100

    container: Add snapshot() implementation
    
    Note that this implementation does not respect GDK windows at all. If
    your widget requires respecting them, you should write your own
    snapshot implementation and not chain up.

 gtk/gtkcontainer.c |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkcontainer.c b/gtk/gtkcontainer.c
index e82f86c..673135f 100644
--- a/gtk/gtkcontainer.c
+++ b/gtk/gtkcontainer.c
@@ -325,6 +325,8 @@ static void     gtk_container_children_callback    (GtkWidget         *widget,
 static void     gtk_container_show_all             (GtkWidget         *widget);
 static gint     gtk_container_draw                 (GtkWidget         *widget,
                                                     cairo_t           *cr);
+static void     gtk_container_snapshot             (GtkWidget         *widget,
+                                                    GtkSnapshot       *snapshot);
 static void     gtk_container_map                  (GtkWidget         *widget);
 static void     gtk_container_unmap                (GtkWidget         *widget);
 static GtkSizeRequestMode gtk_container_get_request_mode (GtkWidget   *widget);
@@ -462,6 +464,7 @@ gtk_container_class_init (GtkContainerClass *class)
   widget_class->destroy = gtk_container_destroy;
   widget_class->compute_expand = gtk_container_compute_expand;
   widget_class->show_all = gtk_container_show_all;
+  widget_class->snapshot = gtk_container_snapshot;
   widget_class->draw = gtk_container_draw;
   widget_class->map = gtk_container_map;
   widget_class->unmap = gtk_container_unmap;
@@ -3079,6 +3082,26 @@ gtk_container_draw (GtkWidget *widget,
 }
 
 static void
+gtk_container_snapshot_forall (GtkWidget *child,
+                               gpointer   snapshot)
+{
+  gtk_container_snapshot_child (GTK_CONTAINER (_gtk_widget_get_parent (child)),
+                                child,
+                                snapshot);
+}
+
+static void
+gtk_container_snapshot (GtkWidget   *widget,
+                        GtkSnapshot *snapshot)
+{
+  GtkContainer *container = GTK_CONTAINER (widget);
+  
+  gtk_container_forall (container,
+                        gtk_container_snapshot_forall,
+                        snapshot);
+}
+
+static void
 gtk_container_map_child (GtkWidget *child,
                          gpointer   client_data)
 {