[gtk+] wayland: Avoid negative size constraints

[Olivier Fourdan <ofourdan src gnome org>]

commit dbd0923b5f7b4a7cdea182c8d20085c013c4571c
Author: Olivier Fourdan <ofourdan redhat com>
Date:   Tue Sep 27 16:48:57 2016 +0200

    wayland: Avoid negative size constraints
    
    Setting the shadow width earlier as done with commit 4cb1b96 to address
    bug 771561 proved to cause unexpected side effects on size_allocate
    signal propagation.
    
    As the window is sized correctly earlier, the size_allocate signal is
    not emitted again in gtk_widget_size_allocate_with_baseline() which
    prevents clutter-gtk from relocating its child widget correctly.
    
    To avoid this issue, revert commit 4cb1b96 but make sure the values
    passed as min and max size is never negative in Wayland as this is a
    protocol error.
    
    With this, the min/max size will be wrong for a short amount of time,
    during the state transition, until the shadow width is updated from
    gdk_window_set_shadow_width().
    
    This approach is much safer and less intrusive than changing the
    size_allocate logic in gtk.
    
    This reverts commit 4cb1b9645e84054c059f174240e8e288c4befe05.
    
    Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=771915

 gdk/wayland/gdkwindow-wayland.c |    8 ++++----
 gtk/gtkwindow.c                 |   14 --------------
 2 files changed, 4 insertions(+), 18 deletions(-)
---
diff --git a/gdk/wayland/gdkwindow-wayland.c b/gdk/wayland/gdkwindow-wayland.c
index fa8dbe0..f35c4c8 100644
--- a/gdk/wayland/gdkwindow-wayland.c
+++ b/gdk/wayland/gdkwindow-wayland.c
@@ -2992,8 +2992,8 @@ gdk_wayland_window_set_geometry_hints (GdkWindow         *window,
 
   if (geom_mask & GDK_HINT_MIN_SIZE)
     {
-      width = geometry->min_width - (impl->margin_left + impl->margin_right);
-      height = geometry->min_height - (impl->margin_top + impl->margin_bottom);
+      width = MAX (0, geometry->min_width - (impl->margin_left + impl->margin_right));
+      height = MAX (0, geometry->min_height - (impl->margin_top + impl->margin_bottom));
     }
   else
     {
@@ -3005,8 +3005,8 @@ gdk_wayland_window_set_geometry_hints (GdkWindow         *window,
 
   if (geom_mask & GDK_HINT_MAX_SIZE)
     {
-      width = geometry->max_width - (impl->margin_left + impl->margin_right);
-      height = geometry->max_height - (impl->margin_top + impl->margin_bottom);
+      width = MAX (0, geometry->max_width - (impl->margin_left + impl->margin_right));
+      height = MAX (0, geometry->max_height - (impl->margin_top + impl->margin_bottom));
     }
   else
     {
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 14a11c3..1a4b14b 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -7529,19 +7529,6 @@ update_window_style_classes (GtkWindow *window)
 }
 
 static void
-update_window_borders (GtkWindow *window)
-{
-  GtkWindowPrivate *priv = window->priv;
-  GtkBorder window_border = { 0 };
-
-  if (priv->client_decorated && priv->use_client_shadow)
-    {
-      get_shadow_width (window, &window_border);
-      update_shadow_width (window, &window_border);
-    }
-}
-
-static void
 popover_size_allocate (GtkWidget        *widget,
                        GtkWindowPopover *popover,
                        GtkWindow        *window)
@@ -7811,7 +7798,6 @@ gtk_window_state_event (GtkWidget           *widget,
     {
       update_window_style_classes (window);
       update_window_buttons (window);
-      update_window_borders (window);
       gtk_widget_queue_resize (widget);
     }