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/*
* Copyright (C) 2012 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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 "AccessibilityController.h"
#if HAVE(ACCESSIBILITY)
#include "InjectedBundle.h"
#include "InjectedBundlePage.h"
#include <WebKit/WKBundlePagePrivate.h>
#include <atk/atk.h>
#include <cstdio>
#include <wtf/glib/GUniquePtr.h>
#include <wtf/text/StringBuilder.h>
namespace WTR {
void AccessibilityController::logAccessibilityEvents()
{
// No longer implemented for ATK. Use addNotificationListener() instead to
// check that relevant ATK signals are being emmitted in response to events.
}
void AccessibilityController::resetToConsistentState()
{
m_globalNotificationHandler = nullptr;
}
static AtkObject* childElementById(AtkObject* parent, const char* id)
{
if (!ATK_IS_OBJECT(parent))
return nullptr;
bool parentFound = false;
AtkAttributeSet* attributeSet = atk_object_get_attributes(parent);
for (AtkAttributeSet* attributes = attributeSet; attributes; attributes = attributes->next) {
AtkAttribute* attribute = static_cast<AtkAttribute*>(attributes->data);
if (!strcmp(attribute->name, "html-id")) {
if (!strcmp(attribute->value, id))
parentFound = true;
break;
}
}
atk_attribute_set_free(attributeSet);
if (parentFound)
return parent;
int childCount = atk_object_get_n_accessible_children(parent);
for (int i = 0; i < childCount; i++) {
AtkObject* result = childElementById(atk_object_ref_accessible_child(parent, i), id);
if (ATK_IS_OBJECT(result))
return result;
}
return nullptr;
}
PassRefPtr<AccessibilityUIElement> AccessibilityController::accessibleElementById(JSStringRef id)
{
AtkObject* root = ATK_OBJECT(WKAccessibilityRootObject(InjectedBundle::singleton().page()->page()));
if (!root)
return nullptr;
size_t bufferSize = JSStringGetMaximumUTF8CStringSize(id);
GUniquePtr<gchar> idBuffer(static_cast<gchar*>(g_malloc(bufferSize)));
JSStringGetUTF8CString(id, idBuffer.get(), bufferSize);
AtkObject* result = childElementById(root, idBuffer.get());
if (ATK_IS_OBJECT(result))
return AccessibilityUIElement::create(result);
return nullptr;
}
JSRetainPtr<JSStringRef> AccessibilityController::platformName()
{
JSRetainPtr<JSStringRef> platformName(Adopt, JSStringCreateWithUTF8CString("atk"));
return platformName;
}
PassRefPtr<AccessibilityUIElement> AccessibilityController::rootElement()
{
WKBundlePageRef page = InjectedBundle::singleton().page()->page();
void* root = WKAccessibilityRootObject(page);
return AccessibilityUIElement::create(static_cast<AtkObject*>(root));
}
PassRefPtr<AccessibilityUIElement> AccessibilityController::focusedElement()
{
WKBundlePageRef page = InjectedBundle::singleton().page()->page();
void* root = WKAccessibilityFocusedObject(page);
return AccessibilityUIElement::create(static_cast<AtkObject*>(root));
}
bool AccessibilityController::addNotificationListener(JSValueRef functionCallback)
{
if (!functionCallback)
return false;
// Only one global notification listener.
if (!m_globalNotificationHandler)
m_globalNotificationHandler = AccessibilityNotificationHandler::create();
m_globalNotificationHandler->setNotificationFunctionCallback(functionCallback);
return true;
}
bool AccessibilityController::removeNotificationListener()
{
// Programmers should not be trying to remove a listener that's already removed.
ASSERT(m_globalNotificationHandler);
m_globalNotificationHandler = nullptr;
return false;
}
} // namespace WTR
#endif // HAVE(ACCESSIBILITY)
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