forked from AuroraMiddleware/gtk
622 lines
18 KiB
C
622 lines
18 KiB
C
/* GAIL - The GNOME Accessibility Implementation Library
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* Copyright 2001, 2002, 2003 Sun Microsystems Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include <gtk/gtk.h>
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#include "gailutil.h"
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#include "gailtoplevel.h"
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#include "gailwindow.h"
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#include "gail-private-macros.h"
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static void gail_util_class_init (GailUtilClass *klass);
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static void gail_util_init (GailUtil *utils);
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/* atkutil.h */
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static guint gail_util_add_global_event_listener (GSignalEmissionHook listener,
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const gchar* event_type);
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static void gail_util_remove_global_event_listener (guint remove_listener);
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static guint gail_util_add_key_event_listener (AtkKeySnoopFunc listener,
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gpointer data);
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static void gail_util_remove_key_event_listener (guint remove_listener);
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static AtkObject* gail_util_get_root (void);
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static G_CONST_RETURN gchar *gail_util_get_toolkit_name (void);
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static G_CONST_RETURN gchar *gail_util_get_toolkit_version (void);
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/* gailmisc/AtkMisc */
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static void gail_misc_class_init (GailMiscClass *klass);
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static void gail_misc_init (GailMisc *misc);
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static void gail_misc_threads_enter (AtkMisc *misc);
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static void gail_misc_threads_leave (AtkMisc *misc);
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/* Misc */
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static void _listener_info_destroy (gpointer data);
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static guint add_listener (GSignalEmissionHook listener,
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const gchar *object_type,
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const gchar *signal,
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const gchar *hook_data);
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static void do_window_event_initialization (void);
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static gboolean state_event_watcher (GSignalInvocationHint *hint,
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guint n_param_values,
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const GValue *param_values,
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gpointer data);
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static void window_added (AtkObject *atk_obj,
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guint index,
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AtkObject *child);
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static void window_removed (AtkObject *atk_obj,
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guint index,
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AtkObject *child);
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static gboolean window_focus (GtkWidget *widget,
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GdkEventFocus *event);
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static gboolean configure_event_watcher (GSignalInvocationHint *hint,
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guint n_param_values,
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const GValue *param_values,
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gpointer data);
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static AtkObject* root = NULL;
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static GHashTable *listener_list = NULL;
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static gint listener_idx = 1;
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static GHashTable *key_listener_list = NULL;
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static guint key_snooper_id = 0;
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typedef struct _GailUtilListenerInfo GailUtilListenerInfo;
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typedef struct _GailKeyEventInfo GailKeyEventInfo;
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struct _GailUtilListenerInfo
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{
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gint key;
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guint signal_id;
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gulong hook_id;
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};
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struct _GailKeyEventInfo
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{
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AtkKeyEventStruct *key_event;
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gpointer func_data;
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};
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G_DEFINE_TYPE (GailUtil, gail_util, ATK_TYPE_UTIL)
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static void
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gail_util_class_init (GailUtilClass *klass)
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{
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AtkUtilClass *atk_class;
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gpointer data;
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data = g_type_class_peek (ATK_TYPE_UTIL);
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atk_class = ATK_UTIL_CLASS (data);
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atk_class->add_global_event_listener =
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gail_util_add_global_event_listener;
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atk_class->remove_global_event_listener =
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gail_util_remove_global_event_listener;
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atk_class->add_key_event_listener =
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gail_util_add_key_event_listener;
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atk_class->remove_key_event_listener =
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gail_util_remove_key_event_listener;
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atk_class->get_root = gail_util_get_root;
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atk_class->get_toolkit_name = gail_util_get_toolkit_name;
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atk_class->get_toolkit_version = gail_util_get_toolkit_version;
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listener_list = g_hash_table_new_full(g_int_hash, g_int_equal, NULL,
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_listener_info_destroy);
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}
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static void
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gail_util_init (GailUtil *utils)
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{
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}
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static guint
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gail_util_add_global_event_listener (GSignalEmissionHook listener,
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const gchar *event_type)
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{
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guint rc = 0;
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gchar **split_string;
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split_string = g_strsplit (event_type, ":", 3);
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if (split_string)
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{
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if (!strcmp ("window", split_string[0]))
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{
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static gboolean initialized = FALSE;
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if (!initialized)
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{
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do_window_event_initialization ();
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initialized = TRUE;
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}
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rc = add_listener (listener, "GailWindow", split_string[1], event_type);
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}
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else
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{
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rc = add_listener (listener, split_string[1], split_string[2], event_type);
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}
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g_strfreev (split_string);
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}
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return rc;
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}
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static void
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gail_util_remove_global_event_listener (guint remove_listener)
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{
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if (remove_listener > 0)
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{
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GailUtilListenerInfo *listener_info;
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gint tmp_idx = remove_listener;
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listener_info = (GailUtilListenerInfo *)
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g_hash_table_lookup(listener_list, &tmp_idx);
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if (listener_info != NULL)
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{
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/* Hook id of 0 and signal id of 0 are invalid */
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if (listener_info->hook_id != 0 && listener_info->signal_id != 0)
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{
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/* Remove the emission hook */
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g_signal_remove_emission_hook(listener_info->signal_id,
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listener_info->hook_id);
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/* Remove the element from the hash */
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g_hash_table_remove(listener_list, &tmp_idx);
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}
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else
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{
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g_warning("Invalid listener hook_id %ld or signal_id %d\n",
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listener_info->hook_id, listener_info->signal_id);
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}
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}
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else
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{
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g_warning("No listener with the specified listener id %d",
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remove_listener);
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}
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}
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else
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{
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g_warning("Invalid listener_id %d", remove_listener);
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}
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}
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static
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AtkKeyEventStruct *
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atk_key_event_from_gdk_event_key (GdkEventKey *key)
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{
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AtkKeyEventStruct *event = g_new0 (AtkKeyEventStruct, 1);
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switch (key->type)
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{
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case GDK_KEY_PRESS:
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event->type = ATK_KEY_EVENT_PRESS;
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break;
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case GDK_KEY_RELEASE:
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event->type = ATK_KEY_EVENT_RELEASE;
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break;
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default:
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g_assert_not_reached ();
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return NULL;
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}
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event->state = key->state;
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event->keyval = key->keyval;
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event->length = key->length;
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if (key->string && key->string [0] &&
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(key->state & GDK_CONTROL_MASK ||
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g_unichar_isgraph (g_utf8_get_char (key->string))))
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{
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event->string = key->string;
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}
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else if (key->type == GDK_KEY_PRESS ||
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key->type == GDK_KEY_RELEASE)
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{
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event->string = gdk_keyval_name (key->keyval);
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}
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event->keycode = key->hardware_keycode;
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event->timestamp = key->time;
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#ifdef GAIL_DEBUG
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g_print ("GailKey:\tsym %u\n\tmods %x\n\tcode %u\n\ttime %lx\n",
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(unsigned int) event->keyval,
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(unsigned int) event->state,
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(unsigned int) event->keycode,
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(unsigned long int) event->timestamp);
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#endif
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return event;
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}
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static gboolean
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notify_hf (gpointer key, gpointer value, gpointer data)
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{
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GailKeyEventInfo *info = (GailKeyEventInfo *) data;
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return (*(AtkKeySnoopFunc) value) (info->key_event, info->func_data) ? TRUE : FALSE;
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}
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static void
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insert_hf (gpointer key, gpointer value, gpointer data)
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{
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GHashTable *new_table = (GHashTable *) data;
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g_hash_table_insert (new_table, key, value);
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}
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static gint
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gail_key_snooper (GtkWidget *the_widget, GdkEventKey *event, gpointer func_data)
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{
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/* notify each AtkKeySnoopFunc in turn... */
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GailKeyEventInfo *info = g_new0 (GailKeyEventInfo, 1);
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gint consumed = 0;
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if (key_listener_list)
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{
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GHashTable *new_hash = g_hash_table_new (NULL, NULL);
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g_hash_table_foreach (key_listener_list, insert_hf, new_hash);
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info->key_event = atk_key_event_from_gdk_event_key (event);
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info->func_data = func_data;
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consumed = g_hash_table_foreach_steal (new_hash, notify_hf, info);
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g_hash_table_destroy (new_hash);
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}
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g_free (info->key_event);
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g_free (info);
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return (consumed ? 1 : 0);
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}
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static guint
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gail_util_add_key_event_listener (AtkKeySnoopFunc listener,
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gpointer data)
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{
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static guint key=0;
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if (!key_listener_list)
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{
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key_listener_list = g_hash_table_new (NULL, NULL);
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key_snooper_id = gtk_key_snooper_install (gail_key_snooper, data);
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}
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g_hash_table_insert (key_listener_list, GUINT_TO_POINTER (key++), (gpointer) listener);
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/* XXX: we don't check to see if n_listeners > MAXUINT */
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return key;
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}
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static void
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gail_util_remove_key_event_listener (guint remove_listener)
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{
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g_hash_table_remove (key_listener_list, GUINT_TO_POINTER (remove_listener));
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if (g_hash_table_size (key_listener_list) == 0)
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{
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gtk_key_snooper_remove (key_snooper_id);
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}
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}
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static AtkObject*
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gail_util_get_root (void)
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{
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if (!root)
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{
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root = g_object_new (GAIL_TYPE_TOPLEVEL, NULL);
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atk_object_initialize (root, NULL);
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}
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return root;
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}
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static G_CONST_RETURN gchar *
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gail_util_get_toolkit_name (void)
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{
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return "GAIL";
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}
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static G_CONST_RETURN gchar *
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gail_util_get_toolkit_version (void)
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{
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/*
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* Version is passed in as a -D flag when this file is
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* compiled.
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*/
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return GTK_VERSION;
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}
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static void
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_listener_info_destroy (gpointer data)
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{
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g_free(data);
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}
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static guint
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add_listener (GSignalEmissionHook listener,
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const gchar *object_type,
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const gchar *signal,
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const gchar *hook_data)
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{
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GType type;
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guint signal_id;
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gint rc = 0;
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type = g_type_from_name (object_type);
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if (type)
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{
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signal_id = g_signal_lookup (signal, type);
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if (signal_id > 0)
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{
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GailUtilListenerInfo *listener_info;
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rc = listener_idx;
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listener_info = g_malloc(sizeof(GailUtilListenerInfo));
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listener_info->key = listener_idx;
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listener_info->hook_id =
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g_signal_add_emission_hook (signal_id, 0, listener,
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g_strdup (hook_data),
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(GDestroyNotify) g_free);
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listener_info->signal_id = signal_id;
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g_hash_table_insert(listener_list, &(listener_info->key), listener_info);
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listener_idx++;
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}
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else
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{
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g_warning("Invalid signal type %s\n", signal);
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}
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}
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else
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{
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g_warning("Invalid object type %s\n", object_type);
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}
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return rc;
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}
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static void
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do_window_event_initialization (void)
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{
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AtkObject *root;
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/*
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* Ensure that GailWindowClass exists.
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*/
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g_type_class_ref (GAIL_TYPE_WINDOW);
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g_signal_add_emission_hook (g_signal_lookup ("window-state-event", GTK_TYPE_WIDGET),
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0, state_event_watcher, NULL, (GDestroyNotify) NULL);
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g_signal_add_emission_hook (g_signal_lookup ("configure-event", GTK_TYPE_WIDGET),
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0, configure_event_watcher, NULL, (GDestroyNotify) NULL);
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root = atk_get_root ();
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g_signal_connect (root, "children-changed::add",
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(GCallback) window_added, NULL);
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g_signal_connect (root, "children-changed::remove",
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(GCallback) window_removed, NULL);
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}
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static gboolean
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state_event_watcher (GSignalInvocationHint *hint,
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guint n_param_values,
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const GValue *param_values,
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gpointer data)
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{
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GObject *object;
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GtkWidget *widget;
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AtkObject *atk_obj;
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AtkObject *parent;
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GdkEventWindowState *event;
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gchar *signal_name;
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guint signal_id;
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object = g_value_get_object (param_values + 0);
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/*
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* The object can be a GtkMenu when it is popped up; we ignore this
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*/
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if (!GTK_IS_WINDOW (object))
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return FALSE;
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event = g_value_get_boxed (param_values + 1);
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gail_return_val_if_fail (event->type == GDK_WINDOW_STATE, FALSE);
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widget = GTK_WIDGET (object);
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if (event->new_window_state & GDK_WINDOW_STATE_MAXIMIZED)
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{
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signal_name = "maximize";
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}
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else if (event->new_window_state & GDK_WINDOW_STATE_ICONIFIED)
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{
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signal_name = "minimize";
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}
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else if (event->new_window_state == 0)
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{
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signal_name = "restore";
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}
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else
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return TRUE;
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atk_obj = gtk_widget_get_accessible (widget);
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if (GAIL_IS_WINDOW (atk_obj))
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{
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parent = atk_object_get_parent (atk_obj);
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if (parent == atk_get_root ())
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{
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signal_id = g_signal_lookup (signal_name, GAIL_TYPE_WINDOW);
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g_signal_emit (atk_obj, signal_id, 0);
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}
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return TRUE;
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}
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else
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{
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return FALSE;
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}
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}
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static void
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window_added (AtkObject *atk_obj,
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guint index,
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AtkObject *child)
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{
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GtkWidget *widget;
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if (!GAIL_IS_WINDOW (child)) return;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (child));
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gail_return_if_fail (widget);
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g_signal_connect (widget, "focus-in-event",
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(GCallback) window_focus, NULL);
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g_signal_connect (widget, "focus-out-event",
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(GCallback) window_focus, NULL);
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g_signal_emit (child, g_signal_lookup ("create", GAIL_TYPE_WINDOW), 0);
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}
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static void
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window_removed (AtkObject *atk_obj,
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guint index,
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AtkObject *child)
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{
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GtkWidget *widget;
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GtkWindow *window;
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if (!GAIL_IS_WINDOW (child)) return;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (child));
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gail_return_if_fail (widget);
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window = GTK_WINDOW (widget);
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/*
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* Deactivate window if it is still focused and we are removing it. This
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* can happen when a dialog displayed by gok is removed.
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*/
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if (gtk_window_is_active (window) &&
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gtk_window_has_toplevel_focus (window))
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{
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gchar *signal_name;
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AtkObject *atk_obj;
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atk_obj = gtk_widget_get_accessible (widget);
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signal_name = "deactivate";
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g_signal_emit (atk_obj, g_signal_lookup (signal_name, GAIL_TYPE_WINDOW), 0);
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}
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g_signal_handlers_disconnect_by_func (widget, (gpointer) window_focus, NULL);
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g_signal_emit (child, g_signal_lookup ("destroy", GAIL_TYPE_WINDOW), 0);
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}
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static gboolean
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window_focus (GtkWidget *widget,
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GdkEventFocus *event)
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{
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gchar *signal_name;
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AtkObject *atk_obj;
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g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
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|
|
atk_obj = gtk_widget_get_accessible (widget);
|
|
signal_name = (event->in) ? "activate" : "deactivate";
|
|
g_signal_emit (atk_obj, g_signal_lookup (signal_name, GAIL_TYPE_WINDOW), 0);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
configure_event_watcher (GSignalInvocationHint *hint,
|
|
guint n_param_values,
|
|
const GValue *param_values,
|
|
gpointer data)
|
|
{
|
|
GtkAllocation allocation;
|
|
GObject *object;
|
|
GtkWidget *widget;
|
|
AtkObject *atk_obj;
|
|
AtkObject *parent;
|
|
GdkEvent *event;
|
|
gchar *signal_name;
|
|
guint signal_id;
|
|
|
|
object = g_value_get_object (param_values + 0);
|
|
if (!GTK_IS_WINDOW (object))
|
|
/*
|
|
* GtkDrawingArea can send a GDK_CONFIGURE event but we ignore here
|
|
*/
|
|
return FALSE;
|
|
|
|
event = g_value_get_boxed (param_values + 1);
|
|
if (event->type != GDK_CONFIGURE)
|
|
return FALSE;
|
|
widget = GTK_WIDGET (object);
|
|
gtk_widget_get_allocation (widget, &allocation);
|
|
if (allocation.x == ((GdkEventConfigure *)event)->x &&
|
|
allocation.y == ((GdkEventConfigure *)event)->y &&
|
|
allocation.width == ((GdkEventConfigure *)event)->width &&
|
|
allocation.height == ((GdkEventConfigure *)event)->height)
|
|
return TRUE;
|
|
|
|
if (allocation.width != ((GdkEventConfigure *)event)->width ||
|
|
allocation.height != ((GdkEventConfigure *)event)->height)
|
|
{
|
|
signal_name = "resize";
|
|
}
|
|
else
|
|
{
|
|
signal_name = "move";
|
|
}
|
|
|
|
atk_obj = gtk_widget_get_accessible (widget);
|
|
if (GAIL_IS_WINDOW (atk_obj))
|
|
{
|
|
parent = atk_object_get_parent (atk_obj);
|
|
if (parent == atk_get_root ())
|
|
{
|
|
signal_id = g_signal_lookup (signal_name, GAIL_TYPE_WINDOW);
|
|
g_signal_emit (atk_obj, signal_id, 0);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
else
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
G_DEFINE_TYPE (GailMisc, gail_misc, ATK_TYPE_MISC)
|
|
|
|
static void
|
|
gail_misc_class_init (GailMiscClass *klass)
|
|
{
|
|
AtkMiscClass *miscclass = ATK_MISC_CLASS (klass);
|
|
miscclass->threads_enter =
|
|
gail_misc_threads_enter;
|
|
miscclass->threads_leave =
|
|
gail_misc_threads_leave;
|
|
atk_misc_instance = g_object_new (GAIL_TYPE_MISC, NULL);
|
|
}
|
|
|
|
static void
|
|
gail_misc_init (GailMisc *misc)
|
|
{
|
|
}
|
|
|
|
static void gail_misc_threads_enter (AtkMisc *misc)
|
|
{
|
|
GDK_THREADS_ENTER ();
|
|
}
|
|
|
|
static void gail_misc_threads_leave (AtkMisc *misc)
|
|
{
|
|
GDK_THREADS_LEAVE ();
|
|
}
|