forked from AuroraMiddleware/gtk
473 lines
12 KiB
C
473 lines
12 KiB
C
/* GAIL - The GNOME Accessibility Implementation Library
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* Copyright 2011, F123 Consulting & Mais Diferenças
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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 <gtk/gtk.h>
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#include "gailutil.h"
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#include "gtktoplevelaccessible.h"
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#include "gtkwindowaccessible.h"
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static GHashTable *listener_list = NULL;
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static gint listener_idx = 1;
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static GSList *key_listener_list = NULL;
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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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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_name,
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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_name, 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_new (GailUtilListenerInfo, 1);
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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_name);
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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 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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object = g_value_get_object (param_values + 0);
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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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if (event->type == GDK_WINDOW_STATE)
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return 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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signal_name = "maximize";
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else if (event->new_window_state & GDK_WINDOW_STATE_ICONIFIED)
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signal_name = "minimize";
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else if (event->new_window_state == 0)
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signal_name = "restore";
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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 (GTK_IS_WINDOW_ACCESSIBLE (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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g_signal_emit_by_name (atk_obj, signal_name);
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return TRUE;
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}
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return FALSE;
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}
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static gboolean
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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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{
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GtkAllocation allocation;
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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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GdkEvent *event;
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gchar *signal_name;
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object = g_value_get_object (param_values + 0);
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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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if (event->type != GDK_CONFIGURE)
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return FALSE;
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widget = GTK_WIDGET (object);
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gtk_widget_get_allocation (widget, &allocation);
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if (allocation.x == ((GdkEventConfigure *)event)->x &&
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allocation.y == ((GdkEventConfigure *)event)->y &&
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allocation.width == ((GdkEventConfigure *)event)->width &&
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allocation.height == ((GdkEventConfigure *)event)->height)
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return TRUE;
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if (allocation.width != ((GdkEventConfigure *)event)->width ||
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allocation.height != ((GdkEventConfigure *)event)->height)
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signal_name = "resize";
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else
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signal_name = "move";
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atk_obj = gtk_widget_get_accessible (widget);
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if (GTK_IS_WINDOW_ACCESSIBLE (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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g_signal_emit_by_name (atk_obj, signal_name);
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return TRUE;
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}
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return FALSE;
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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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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);
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g_signal_emit_by_name (atk_obj, event->in ? "activate" : "deactivate");
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return FALSE;
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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 (!GTK_IS_WINDOW_ACCESSIBLE (child))
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return;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (child));
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if (!widget)
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return;
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g_signal_connect (widget, "focus-in-event", (GCallback) window_focus, NULL);
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g_signal_connect (widget, "focus-out-event", (GCallback) window_focus, NULL);
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g_signal_emit_by_name (child, "create");
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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 (!GTK_IS_WINDOW_ACCESSIBLE (child))
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return;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (child));
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if (!widget)
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return;
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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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g_signal_emit_by_name (child, "deactivate");
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g_signal_handlers_disconnect_by_func (widget, (gpointer) window_focus, NULL);
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g_signal_emit_by_name (child, "destroy");
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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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g_type_class_ref (GTK_TYPE_WINDOW_ACCESSIBLE);
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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 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 (g_strv_length (split_string) == 3)
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rc = add_listener (listener, split_string[1], split_string[2], event_type);
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g_strfreev (split_string);
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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 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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typedef struct {
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AtkKeySnoopFunc func;
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gpointer data;
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guint key;
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} KeyEventListener;
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gboolean
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_gail_util_key_snooper (GtkWidget *the_widget,
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GdkEventKey *event)
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{
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GSList *l;
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AtkKeyEventStruct *atk_event;
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gboolean result;
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atk_event = atk_key_event_from_gdk_event_key (event);
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result = FALSE;
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for (l = key_listener_list; l; l = l->next)
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{
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KeyEventListener *listener = l->data;
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result |= listener->func (atk_event, listener->data);
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}
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g_free (atk_event);
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return result;
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}
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static guint
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gail_util_add_key_event_listener (AtkKeySnoopFunc listener_func,
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gpointer listener_data)
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{
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static guint key = 0;
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KeyEventListener *listener;
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key++;
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listener = g_slice_new0 (KeyEventListener);
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listener->func = listener_func;
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listener->data = listener_data;
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listener->key = key;
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key_listener_list = g_slist_append (key_listener_list, listener);
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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 listener_key)
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{
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GSList *l;
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for (l = key_listener_list; l; l = l->next)
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{
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KeyEventListener *listener = l->data;
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if (listener->key == listener_key)
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{
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g_slice_free (KeyEventListener, listener);
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key_listener_list = g_slist_delete_link (key_listener_list, l);
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break;
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}
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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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static AtkObject *root = NULL;
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if (!root)
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{
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root = g_object_new (GTK_TYPE_TOPLEVEL_ACCESSIBLE, 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 const gchar *
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gail_util_get_toolkit_name (void)
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{
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return "gtk";
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}
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static const gchar *
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gail_util_get_toolkit_version (void)
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{
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return GTK_VERSION;
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}
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void
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_gail_util_install (void)
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{
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AtkUtilClass *atk_class = ATK_UTIL_CLASS (g_type_class_ref (ATK_TYPE_UTIL));
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atk_class->add_global_event_listener = gail_util_add_global_event_listener;
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atk_class->remove_global_event_listener = gail_util_remove_global_event_listener;
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atk_class->add_key_event_listener = gail_util_add_key_event_listener;
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atk_class->remove_key_event_listener = 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, g_free);
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do_window_event_initialization ();
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}
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