[epiphany-extensions/tabs-reloaded: 13/16] [tabs-reloaded] Only cause redraws when relevant properties change

[Benjamin Otte <otte src gnome org>]

commit e5a25df472ed35089adc52df5addbcc040fd3b68
Author: Benjamin Otte <otte gnome org>
Date:   Fri Aug 7 23:55:35 2009 +0200

    [tabs-reloaded] Only cause redraws when relevant properties change
    
    Previously we redrew whenever a notify signal happened. That was very
    often, so it felt slow.

 extensions/tabs-reloaded/ephy-cell-renderer-tab.c |   48 +++++++++++++++++++++
 extensions/tabs-reloaded/ephy-cell-renderer-tab.h |    7 ++-
 extensions/tabs-reloaded/ephy-tabs-manager.c      |   10 +++-
 3 files changed, 59 insertions(+), 6 deletions(-)
---
diff --git a/extensions/tabs-reloaded/ephy-cell-renderer-tab.c b/extensions/tabs-reloaded/ephy-cell-renderer-tab.c
index 46e1584..8b8e3c6 100644
--- a/extensions/tabs-reloaded/ephy-cell-renderer-tab.c
+++ b/extensions/tabs-reloaded/ephy-cell-renderer-tab.c
@@ -414,3 +414,51 @@ ephy_cell_renderer_tab_new (void)
   return g_object_new (EPHY_TYPE_CELL_RENDERER_TAB, NULL);
 }
 
+/**
+ * ephy_cell_renderer_needs_invalidation:
+ * @property_name: interned name of the property
+ *
+ * Checks if a #EphyCellRendererTab would need a repaint if the 
+ * property with the given @property_name would have been changed 
+ * on the #EphyWebView asociated to the #EphyEmbed of its tab. In 
+ * that case, you should likely call gtk_tree_model_row_changed()
+ * on the row that represents the node that changed to cause this 
+ * repaint.
+ *
+ * Returns: %TRUE if a tab would need a repaint, %FALSE if not.
+ **/
+gboolean 
+ephy_cell_renderer_needs_invalidation (const char *property_name)
+{
+  static struct {
+    const char *property_name;
+    const char *interned_name;
+  } properties[] = {
+    /* EphyWebView */
+    { "embed-title", NULL },
+    { "icon", NULL },
+    /* WebKitWebView */
+    { "progress", NULL },
+    { "load-status", NULL },
+  };
+  guint i;
+
+  g_return_val_if_fail (property_name != NULL, TRUE);
+
+  if (properties[0].interned_name == NULL)
+    {
+      for (i = 0; i < G_N_ELEMENTS (properties); i++)
+        {
+          properties[i].interned_name = g_intern_string (properties[i].property_name);
+        }
+    }
+
+  for (i = 0; i < G_N_ELEMENTS (properties); i++)
+    {
+      if (properties[i].interned_name == property_name)
+        return TRUE;
+    }
+
+  return FALSE;
+}
+
diff --git a/extensions/tabs-reloaded/ephy-cell-renderer-tab.h b/extensions/tabs-reloaded/ephy-cell-renderer-tab.h
index 5250306..d4e1b48 100644
--- a/extensions/tabs-reloaded/ephy-cell-renderer-tab.h
+++ b/extensions/tabs-reloaded/ephy-cell-renderer-tab.h
@@ -47,11 +47,12 @@ struct _EphyCellRendererTabClass
   GtkCellRendererClass parent_class;
 };
 
-GType            ephy_cell_renderer_tab_get_type (void) G_GNUC_CONST;
-void             ephy_cell_renderer_tab_register (GTypeModule *module);
+GType            ephy_cell_renderer_tab_get_type        (void) G_GNUC_CONST;
+void             ephy_cell_renderer_tab_register        (GTypeModule *    module);
 
-GtkCellRenderer *ephy_cell_renderer_tab_new      (void);
+GtkCellRenderer *ephy_cell_renderer_tab_new             (void);
 
+gboolean         ephy_cell_renderer_needs_invalidation  (const char *     property_name);
 
 G_END_DECLS
 
diff --git a/extensions/tabs-reloaded/ephy-tabs-manager.c b/extensions/tabs-reloaded/ephy-tabs-manager.c
index 6fa22d6..7bac2ff 100644
--- a/extensions/tabs-reloaded/ephy-tabs-manager.c
+++ b/extensions/tabs-reloaded/ephy-tabs-manager.c
@@ -19,9 +19,9 @@
 #include "config.h"
 
 #include "ephy-tabs-manager.h"
-#include "ephy-debug.h"
 
-#include <epiphany/epiphany.h>
+#include "ephy-cell-renderer-tab.h"
+#include "ephy-debug.h"
 
 G_DEFINE_DYNAMIC_TYPE (EphyTabsManager, ephy_tabs_manager, GTK_TYPE_TREE_STORE)
 
@@ -97,13 +97,17 @@ ephy_tabs_manager_new (void)
 }
 
 static void
-ephy_tabs_manager_view_changed (GObject *view, GParamSpec *psepc, EphyTabsManager *manager)
+ephy_tabs_manager_view_changed (GObject *view, GParamSpec *pspec, EphyTabsManager *manager)
 {
   GtkTreeModel *model = GTK_TREE_MODEL (manager);
   GtkTreeIter iter;
   EphyEmbed *embed;
   GtkTreePath *path;
 
+  /* remove the interning code once bug 591106 is fixed */
+  if (!ephy_cell_renderer_needs_invalidation (g_intern_string (pspec->name)))
+    return;
+
   embed = EPHY_EMBED (gtk_widget_get_parent (GTK_WIDGET (view)));
   if (!ephy_tabs_manager_find_tab (manager, &iter, embed))
     {