Initial revision

1 files changed, 116 insertions, 0 deletions

diff --git a/atk/atkutil.c b/atk/atkutil.c
new file mode 100755
index 0000000..e9317f5
--- /dev/null
+++ b/atk/atkutil.c
@@ -0,0 +1,116 @@
+/* ATK -  Accessibility Toolkit
+ * Copyright 2001 Sun Microsystems Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "atkutil.h"
+
+/*
+ * This file supports the addition and removal of multiple focus handlers
+ * as long as they are all called in the same thread.
+ */
+static AtkFocusTrackerInit  focus_tracker_init = NULL;
+
+static gboolean init_done = FALSE;
+
+/*
+ * Array of FocusTracker structs
+ */
+static GArray *trackers = NULL;
+static guint  index = 0;
+
+struct _FocusTracker {
+  guint index;
+  AtkFocusTracker func;
+};
+typedef struct _FocusTracker FocusTracker;
+  
+void
+atk_focus_tracker_init (AtkFocusTrackerInit    init)
+{
+  if (focus_tracker_init == NULL)
+    focus_tracker_init = init;
+}
+
+guint
+atk_add_focus_tracker (AtkFocusTracker   focus_tracker)
+{
+  g_return_val_if_fail ((focus_tracker != NULL), 0);
+
+  if (!init_done)
+  {
+    if (focus_tracker_init != NULL)
+    {
+      focus_tracker_init ();
+    }
+    trackers = g_array_sized_new (FALSE, TRUE, sizeof (FocusTracker), 0);
+    init_done = TRUE;
+  }
+  if (init_done)
+  {
+    FocusTracker item;
+
+    item.index = ++index;
+    item.func = focus_tracker;
+    trackers = g_array_append_val (trackers, item); 
+    return index;
+  }
+  else
+  {
+    return 0;
+  }
+}
+
+void
+atk_remove_focus_tracker (guint            tracker_id)
+{
+  FocusTracker *item;
+  guint i;
+
+  if (trackers == NULL)
+    return;
+
+  if (tracker_id == 0)
+    return;
+
+  for (i = 0; i < trackers->len; i++)
+  {
+    item = &g_array_index (trackers, FocusTracker, i);
+    if (item->index == tracker_id)
+    {
+      trackers = g_array_remove_index (trackers, i);
+      break;
+    }
+  }
+}
+
+void
+atk_focus_tracker_notify (AtkObject       *object)
+{
+  FocusTracker *item;
+  guint i;
+
+  if (trackers == NULL)
+    return;
+
+  for (i = 0; i < trackers->len; i++)
+  {
+    item = &g_array_index (trackers, FocusTracker, i);
+    g_return_if_fail (item != NULL);
+    item->func (object);
+  }
+}