[gtk+/wip/gbsneto/other-locations] cssnode: Only invalidate sibling nodes if changed node is visible

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit c29e1711b9b856bc083097ea30ed0da50a48c696
Author: Benjamin Otte <otte redhat com>
Date:   Fri Jul 10 21:34:06 2015 +0200

    cssnode: Only invalidate sibling nodes if changed node is visible

 gtk/gtkcssnode.c |   35 +++++++++++++++++++++++++----------
 1 files changed, 25 insertions(+), 10 deletions(-)
---
diff --git a/gtk/gtkcssnode.c b/gtk/gtkcssnode.c
index 29301eb..7bae9d5 100644
--- a/gtk/gtkcssnode.c
+++ b/gtk/gtkcssnode.c
@@ -657,7 +657,7 @@ gtk_css_node_reposition (GtkCssNode *node,
   if (old_parent != NULL)
     {
       g_signal_emit (old_parent, cssnode_signals[NODE_REMOVED], 0, node, node->previous_sibling);
-      if (old_parent->first_child)
+      if (old_parent->first_child && node->visible)
         gtk_css_node_invalidate (old_parent->first_child, GTK_CSS_CHANGE_NTH_LAST_CHILD);
     }
 
@@ -694,19 +694,28 @@ gtk_css_node_reposition (GtkCssNode *node,
   if (new_parent)
     {
       g_signal_emit (new_parent, cssnode_signals[NODE_ADDED], 0, node, previous);
-      gtk_css_node_invalidate (new_parent->first_child, GTK_CSS_CHANGE_NTH_LAST_CHILD);
+      if (node->visible)
+        gtk_css_node_invalidate (new_parent->first_child, GTK_CSS_CHANGE_NTH_LAST_CHILD);
     }
 
-  if (node->next_sibling)
+  if (node->visible)
     {
-      if (node->previous_sibling == NULL)
-        gtk_css_node_invalidate (node->next_sibling, GTK_CSS_CHANGE_FIRST_CHILD);
-      else
-        gtk_css_node_invalidate_style (node->next_sibling);
+      if (node->next_sibling)
+        {
+          if (node->previous_sibling == NULL)
+            gtk_css_node_invalidate (node->next_sibling, GTK_CSS_CHANGE_FIRST_CHILD);
+          else
+            gtk_css_node_invalidate_style (node->next_sibling);
+        }
+      else if (node->previous_sibling)
+        {
+          gtk_css_node_invalidate (node->previous_sibling, GTK_CSS_CHANGE_LAST_CHILD);
+        }
     }
-  else if (node->previous_sibling)
+  else
     {
-      gtk_css_node_invalidate (node->previous_sibling, GTK_CSS_CHANGE_LAST_CHILD);
+      if (node->next_sibling)
+        gtk_css_node_invalidate_style (node->next_sibling);
     }
 
   gtk_css_node_invalidate (node, GTK_CSS_CHANGE_ANY_PARENT
@@ -888,7 +897,13 @@ gtk_css_node_set_visible (GtkCssNode *cssnode,
   g_object_notify_by_pspec (G_OBJECT (cssnode), cssnode_properties[PROP_VISIBLE]);
 
   if (cssnode->next_sibling)
-    gtk_css_node_invalidate (cssnode->next_sibling, GTK_CSS_CHANGE_POSITION | GTK_CSS_CHANGE_ANY_SIBLING);
+    gtk_css_node_invalidate (cssnode->next_sibling, GTK_CSS_CHANGE_ANY_SIBLING
+                                                    | GTK_CSS_CHANGE_NTH_CHILD
+                                                    | (cssnode->previous_sibling ? 0 : 
GTK_CSS_CHANGE_FIRST_CHILD));
+
+  if (cssnode->previous_sibling)
+    gtk_css_node_invalidate (cssnode->previous_sibling, GTK_CSS_CHANGE_NTH_LAST_CHILD
+                                                        | (cssnode->next_sibling ? 0 : 
GTK_CSS_CHANGE_LAST_CHILD));
 }
 
 gboolean