[gtk+] size-request: Clamp size requests to screen size

[Benjamin Otte <otte src gnome org>]

commit 544146b9be4078009c35695b1744431c98a81a40
Author: Benjamin Otte <otte redhat com>
Date:   Wed Dec 15 10:33:02 2010 +0100

    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.

 gtk/gtksizerequest.c |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtksizerequest.c b/gtk/gtksizerequest.c
index c5e49e7..41ec259 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)