size-request: Clamp size requests to screen size

Size requests should only ever need to return the screen's width/height
and max. This way, potentially large widgets (tree view or icon view)
don't need to do so many computations, but can stop when their computed
size has reached the screen size.

1 files changed, 16 insertions, 0 deletions

diff --git a/gtk/gtksizerequest.c b/gtk/gtksizerequest.c
index c5e49e7db3..41ec2599f4 100644
--- a/gtk/gtksizerequest.c
+++ b/gtk/gtksizerequest.c
@@ -239,6 +239,14 @@ compute_size_for_orientation (GtkWidget         *widget,
 									     &min_size, &nat_size);
 	      pop_recursion_check (widget, orientation);
             }
+#ifndef G_DISABLE_CHECKS
+          if (gtk_widget_get_screen (widget))
+            {
+              guint screen_width = gdk_screen_get_width (gtk_widget_get_screen (widget));
+              min_size = MIN (min_size, screen_width);
+              nat_size = MIN (nat_size, screen_width);
+            }
+#endif
         }
       else
         {
@@ -272,6 +280,14 @@ compute_size_for_orientation (GtkWidget         *widget,
 									     &min_size, &nat_size);
 	      pop_recursion_check (widget, orientation);
             }
+#ifndef G_DISABLE_CHECKS
+          if (gtk_widget_get_screen (widget))
+            {
+              guint screen_height = gdk_screen_get_height (gtk_widget_get_screen (widget));
+              min_size = MIN (min_size, screen_height);
+              nat_size = MIN (nat_size, screen_height);
+            }
+#endif
         }
 
       if (min_size > nat_size)