[gtk+/gtk-3-16] a11y: Only emit signals when cells change; not upon creation

[Benjamin Otte <otte src gnome org>]

commit 06efce6fa2de8d7b77050a37a22ec20e355e2914
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Apr 8 20:08:25 2015 -0400

    a11y: Only emit signals when cells change; not upon creation
    
    This is a workaround for atspi-atk behaviour.
    
    atspi-atk uses signal emission hooks. So it to already catches
    signal emissions on creation of objects, before anyone could even
    think of g_signal_connect()ing.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=746706

 gtk/a11y/gtkbooleancellaccessible.c   |    9 ++++++---
 gtk/a11y/gtkcellaccessible.c          |   10 +++++++---
 gtk/a11y/gtkcellaccessible.h          |    3 ++-
 gtk/a11y/gtkcellaccessibleprivate.h   |    3 ++-
 gtk/a11y/gtkcontainercellaccessible.c |    5 +++--
 gtk/a11y/gtktextcellaccessible.c      |   12 +++++++-----
 gtk/a11y/gtktreeviewaccessible.c      |    4 ++--
 7 files changed, 29 insertions(+), 17 deletions(-)
---
diff --git a/gtk/a11y/gtkbooleancellaccessible.c b/gtk/a11y/gtkbooleancellaccessible.c
index f12ff31..694f867 100644
--- a/gtk/a11y/gtkbooleancellaccessible.c
+++ b/gtk/a11y/gtkbooleancellaccessible.c
@@ -113,7 +113,8 @@ gtk_boolean_cell_accessible_ref_state_set (AtkObject *accessible)
 }
 
 static void
-gtk_boolean_cell_accessible_update_cache (GtkCellAccessible *cell)
+gtk_boolean_cell_accessible_update_cache (GtkCellAccessible *cell,
+                                          gboolean            emit_signal)
 {
   GtkBooleanCellAccessible *boolean_cell = GTK_BOOLEAN_CELL_ACCESSIBLE (cell);
   gboolean active;
@@ -131,14 +132,16 @@ gtk_boolean_cell_accessible_update_cache (GtkCellAccessible *cell)
     {
       boolean_cell->priv->cell_value = !boolean_cell->priv->cell_value;
 
-      atk_object_notify_state_change (ATK_OBJECT (cell), ATK_STATE_CHECKED, active);
+      if (emit_signal)
+        atk_object_notify_state_change (ATK_OBJECT (cell), ATK_STATE_CHECKED, active);
     }
 
   if (boolean_cell->priv->cell_sensitive != sensitive)
     {
       boolean_cell->priv->cell_sensitive = !boolean_cell->priv->cell_sensitive;
 
-      atk_object_notify_state_change (ATK_OBJECT (cell), ATK_STATE_SENSITIVE, sensitive);
+      if (emit_signal)
+        atk_object_notify_state_change (ATK_OBJECT (cell), ATK_STATE_SENSITIVE, sensitive);
     }
 }
 
diff --git a/gtk/a11y/gtkcellaccessible.c b/gtk/a11y/gtkcellaccessible.c
index 11775e4..ad76014 100644
--- a/gtk/a11y/gtkcellaccessible.c
+++ b/gtk/a11y/gtkcellaccessible.c
@@ -419,19 +419,23 @@ _gtk_cell_accessible_state_changed (GtkCellAccessible    *cell,
 /*
  * gtk_cell_accessible_update_cache:
  * @cell: the cell that is changed
+ * @emit_signal: whether or not to notify the ATK bridge
  *
  * Notifies the cell that the values in the data in the row that
  * is used to feed the cell renderer with has changed. The
  * cell_changed function of @cell is called to send update
  * notifications for the properties it takes from its cell
- * renderer.
+ * renderer. If @emit_signal is TRUE, also notify the ATK bridge
+ * of the change. The bridge should be notified when an existing
+ * cell changes; not when a newly-created cell is being set up.
  *
  * Note that there is no higher granularity available about which
  * properties changed, so you will need to make do with this
  * function.
  **/
 void
-_gtk_cell_accessible_update_cache (GtkCellAccessible *cell)
+_gtk_cell_accessible_update_cache (GtkCellAccessible *cell,
+                                   gboolean           emit_signal)
 {
   GtkCellAccessibleClass *klass;
 
@@ -440,5 +444,5 @@ _gtk_cell_accessible_update_cache (GtkCellAccessible *cell)
   klass = GTK_CELL_ACCESSIBLE_GET_CLASS (cell);
 
   if (klass->update_cache)
-    klass->update_cache (cell);
+    klass->update_cache (cell, emit_signal);
 }
diff --git a/gtk/a11y/gtkcellaccessible.h b/gtk/a11y/gtkcellaccessible.h
index 169216f..1195a38 100644
--- a/gtk/a11y/gtkcellaccessible.h
+++ b/gtk/a11y/gtkcellaccessible.h
@@ -48,7 +48,8 @@ struct _GtkCellAccessible
 struct _GtkCellAccessibleClass
 {
   GtkAccessibleClass parent_class;
-  void (*update_cache) (GtkCellAccessible *cell);
+  void (*update_cache) (GtkCellAccessible *cell,
+                        gboolean           emit_signal);
 };
 
 GDK_AVAILABLE_IN_ALL
diff --git a/gtk/a11y/gtkcellaccessibleprivate.h b/gtk/a11y/gtkcellaccessibleprivate.h
index e4417fa..80fb143 100644
--- a/gtk/a11y/gtkcellaccessibleprivate.h
+++ b/gtk/a11y/gtkcellaccessibleprivate.h
@@ -25,7 +25,8 @@ G_BEGIN_DECLS
 void     _gtk_cell_accessible_state_changed (GtkCellAccessible *cell,
                                              GtkCellRendererState added,
                                              GtkCellRendererState removed);
-void     _gtk_cell_accessible_update_cache  (GtkCellAccessible *cell);
+void     _gtk_cell_accessible_update_cache  (GtkCellAccessible *cell,
+                                             gboolean           emit_signal);
 void     _gtk_cell_accessible_initialize    (GtkCellAccessible *cell,
                                              GtkWidget         *widget,
                                              AtkObject         *parent);
diff --git a/gtk/a11y/gtkcontainercellaccessible.c b/gtk/a11y/gtkcontainercellaccessible.c
index ad9fb81..a756e3c 100644
--- a/gtk/a11y/gtkcontainercellaccessible.c
+++ b/gtk/a11y/gtkcontainercellaccessible.c
@@ -64,13 +64,14 @@ gtk_container_cell_accessible_ref_child (AtkObject *obj,
 }
 
 static void
-gtk_container_cell_accessible_update_cache (GtkCellAccessible *cell)
+gtk_container_cell_accessible_update_cache (GtkCellAccessible *cell,
+                                            gboolean           emit_signal)
 {
   GtkContainerCellAccessible *container = GTK_CONTAINER_CELL_ACCESSIBLE (cell);
   GList *l;
 
   for (l = container->priv->children; l; l = l->next)
-    _gtk_cell_accessible_update_cache (l->data);
+    _gtk_cell_accessible_update_cache (l->data, emit_signal);
 }
 
 static void
diff --git a/gtk/a11y/gtktextcellaccessible.c b/gtk/a11y/gtktextcellaccessible.c
index aca9693..e6a0df2 100644
--- a/gtk/a11y/gtktextcellaccessible.c
+++ b/gtk/a11y/gtktextcellaccessible.c
@@ -87,7 +87,8 @@ static void             add_attr                        (PangoAttrList  *attr_li
 
 /* Misc */
 
-static void gtk_text_cell_accessible_update_cache       (GtkCellAccessible *cell);
+static void gtk_text_cell_accessible_update_cache       (GtkCellAccessible *cell,
+                                                         gboolean           emit_signal);
 
 static void atk_text_interface_init (AtkTextIface *iface);
 
@@ -132,7 +133,8 @@ gtk_text_cell_accessible_get_name (AtkObject *atk_obj)
 }
 
 static void
-gtk_text_cell_accessible_update_cache (GtkCellAccessible *cell)
+gtk_text_cell_accessible_update_cache (GtkCellAccessible *cell,
+                                       gboolean           emit_signal)
 {
   GtkTextCellAccessible *text_cell = GTK_TEXT_CELL_ACCESSIBLE (cell);
   AtkObject *obj = ATK_OBJECT (cell);
@@ -154,7 +156,7 @@ gtk_text_cell_accessible_update_cache (GtkCellAccessible *cell)
 
   if (g_strcmp0 (text_cell->priv->cell_text, text) != 0)
     {
-      if (text_cell->priv->cell_length)
+      if (text_cell->priv->cell_length && emit_signal)
         {
           g_signal_emit_by_name (cell, "text-changed::delete",
                                  0, text_cell->priv->cell_length);
@@ -164,13 +166,13 @@ gtk_text_cell_accessible_update_cache (GtkCellAccessible *cell)
       text_cell->priv->cell_text = g_strdup (text);
       text_cell->priv->cell_length = text_length;
 
-      if (text_length)
+      if (text_length && emit_signal)
         {
           g_signal_emit_by_name (cell, "text-changed::insert",
                                  0, text_cell->priv->cell_length);
         }
 
-      if (obj->name == NULL)
+      if (obj->name == NULL && emit_signal)
         g_object_notify (G_OBJECT (obj), "accessible-name");
     }
 
diff --git a/gtk/a11y/gtktreeviewaccessible.c b/gtk/a11y/gtktreeviewaccessible.c
index cba51c4..a95054d 100644
--- a/gtk/a11y/gtktreeviewaccessible.c
+++ b/gtk/a11y/gtktreeviewaccessible.c
@@ -425,7 +425,7 @@ create_cell (GtkTreeView           *treeview,
   cell_info_new (accessible, tree, node, column, cell);
 
   set_cell_data (treeview, accessible, cell);
-  _gtk_cell_accessible_update_cache (cell);
+  _gtk_cell_accessible_update_cache (cell, FALSE);
 
   return cell;
 }
@@ -1705,7 +1705,7 @@ _gtk_tree_view_accessible_changed (GtkTreeView *treeview,
         continue;
 
       set_cell_data (treeview, accessible, cell);
-      _gtk_cell_accessible_update_cache (cell);
+      _gtk_cell_accessible_update_cache (cell, TRUE);
     }
 
   g_signal_emit_by_name (accessible, "visible-data-changed");