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/*
* Copyright (C) 2011 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "AccessibilityCallbacks.h"
#if HAVE(ACCESSIBILITY)
#include "AccessibilityController.h"
#include "DumpRenderTree.h"
#include <atk/atk.h>
#include <wtf/gobject/GOwnPtr.h>
#if PLATFORM(GTK)
#include "WebCoreSupport/DumpRenderTreeSupportGtk.h"
#include <webkit/webkit.h>
#endif
#if PLATFORM(EFL)
#include "DumpRenderTreeChrome.h"
#include "WebCoreSupport/DumpRenderTreeSupportEfl.h"
#endif
static guint stateChangeListenerId = 0;
static guint focusEventListenerId = 0;
static guint activeDescendantChangedListenerId = 0;
static guint childrenChangedListenerId = 0;
static guint propertyChangedListenerId = 0;
static guint visibleDataChangedListenerId = 0;
static void printAccessibilityEvent(AtkObject* accessible, const gchar* signalName, const gchar* signalValue)
{
// Do not handle state-change:defunct signals, as the AtkObject
// associated to them will not be valid at this point already.
if (!signalName || !g_strcmp0(signalName, "state-change:defunct"))
return;
if (!accessible || !ATK_IS_OBJECT(accessible))
return;
const gchar* objectName = atk_object_get_name(accessible);
AtkRole objectRole = atk_object_get_role(accessible);
// Try to always provide a name to be logged for the object.
if (!objectName || *objectName == '\0')
objectName = "(No name)";
GOwnPtr<gchar> signalNameAndValue(signalValue ? g_strdup_printf("%s = %s", signalName, signalValue) : g_strdup(signalName));
printf("Accessibility object emitted \"%s\" / Name: \"%s\" / Role: %d\n", signalNameAndValue.get(), objectName, objectRole);
}
static gboolean axObjectEventListener(GSignalInvocationHint *signalHint, guint numParamValues, const GValue *paramValues, gpointer data)
{
// At least we should receive the instance emitting the signal.
if (numParamValues < 1)
return TRUE;
AtkObject* accessible = ATK_OBJECT(g_value_get_object(¶mValues[0]));
if (!accessible || !ATK_IS_OBJECT(accessible))
return TRUE;
GSignalQuery signalQuery;
GOwnPtr<gchar> signalName;
GOwnPtr<gchar> signalValue;
g_signal_query(signalHint->signal_id, &signalQuery);
if (!g_strcmp0(signalQuery.signal_name, "state-change")) {
signalName.set(g_strdup_printf("state-change:%s", g_value_get_string(¶mValues[1])));
signalValue.set(g_strdup_printf("%d", g_value_get_boolean(¶mValues[2])));
} else if (!g_strcmp0(signalQuery.signal_name, "focus-event")) {
signalName.set(g_strdup("focus-event"));
signalValue.set(g_strdup_printf("%d", g_value_get_boolean(¶mValues[1])));
} else if (!g_strcmp0(signalQuery.signal_name, "children-changed")) {
signalName.set(g_strdup("children-changed"));
signalValue.set(g_strdup_printf("%d", g_value_get_uint(¶mValues[1])));
} else if (!g_strcmp0(signalQuery.signal_name, "property-change"))
signalName.set(g_strdup_printf("property-change:%s", g_quark_to_string(signalHint->detail)));
else
signalName.set(g_strdup(signalQuery.signal_name));
printAccessibilityEvent(accessible, signalName.get(), signalValue.get());
return TRUE;
}
void connectAccessibilityCallbacks()
{
// Ensure no callbacks are connected before.
disconnectAccessibilityCallbacks();
// Ensure that accessibility is initialized for the WebView by querying for
// the root accessible object, which will create the full hierarchy.
#if PLATFORM(GTK)
DumpRenderTreeSupportGtk::getRootAccessibleElement(mainFrame);
#elif PLATFORM(EFL)
DumpRenderTreeSupportEfl::rootAccessibleElement(browser->mainFrame());
#endif
// Add global listeners for AtkObject's signals.
stateChangeListenerId = atk_add_global_event_listener(axObjectEventListener, "ATK:AtkObject:state-change");
focusEventListenerId = atk_add_global_event_listener(axObjectEventListener, "ATK:AtkObject:focus-event");
activeDescendantChangedListenerId = atk_add_global_event_listener(axObjectEventListener, "ATK:AtkObject:active-descendant-changed");
childrenChangedListenerId = atk_add_global_event_listener(axObjectEventListener, "ATK:AtkObject:children-changed");
propertyChangedListenerId = atk_add_global_event_listener(axObjectEventListener, "ATK:AtkObject:property-change");
visibleDataChangedListenerId = atk_add_global_event_listener(axObjectEventListener, "ATK:AtkObject:visible-data-changed");
// Ensure the Atk interface types are registered, otherwise
// the AtkDocument signal handlers below won't get registered.
GObject* dummyAxObject = G_OBJECT(g_object_new(ATK_TYPE_OBJECT, 0));
AtkObject* dummyNoOpAxObject = atk_no_op_object_new(dummyAxObject);
g_object_unref(G_OBJECT(dummyNoOpAxObject));
g_object_unref(dummyAxObject);
}
void disconnectAccessibilityCallbacks()
{
// AtkObject signals.
if (stateChangeListenerId) {
atk_remove_global_event_listener(stateChangeListenerId);
stateChangeListenerId = 0;
}
if (focusEventListenerId) {
atk_remove_global_event_listener(focusEventListenerId);
focusEventListenerId = 0;
}
if (activeDescendantChangedListenerId) {
atk_remove_global_event_listener(activeDescendantChangedListenerId);
activeDescendantChangedListenerId = 0;
}
if (childrenChangedListenerId) {
atk_remove_global_event_listener(childrenChangedListenerId);
childrenChangedListenerId = 0;
}
if (propertyChangedListenerId) {
atk_remove_global_event_listener(propertyChangedListenerId);
propertyChangedListenerId = 0;
}
if (visibleDataChangedListenerId) {
atk_remove_global_event_listener(visibleDataChangedListenerId);
visibleDataChangedListenerId = 0;
}
}
#endif
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