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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:
* 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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 "WebPageAccessibilityObject.h"
#if HAVE(ACCESSIBILITY)
#include "WebPage.h"
#include <WebCore/AXObjectCache.h>
#include <WebCore/Document.h>
#include <WebCore/MainFrame.h>
#include <WebCore/Page.h>
using namespace WebKit;
using namespace WebCore;
G_DEFINE_TYPE(WebPageAccessibilityObject, web_page_accessibility_object, ATK_TYPE_PLUG)
static AtkObject* accessibilityRootObjectWrapper(AtkObject* atkObject)
{
if (!AXObjectCache::accessibilityEnabled())
AXObjectCache::enableAccessibility();
WebPageAccessibilityObject* accessible = WEB_PAGE_ACCESSIBILITY_OBJECT(atkObject);
if (!accessible->m_page)
return 0;
Page* corePage = accessible->m_page->corePage();
if (!corePage)
return 0;
Frame& coreFrame = corePage->mainFrame();
if (!coreFrame.document())
return 0;
AXObjectCache* cache = coreFrame.document()->axObjectCache();
if (!cache)
return nullptr;
AccessibilityObject* coreRootObject = cache->rootObject();
if (!coreRootObject)
return 0;
AtkObject* rootObject = coreRootObject->wrapper();
if (!rootObject || !ATK_IS_OBJECT(rootObject))
return 0;
return rootObject;
}
static void webPageAccessibilityObjectInitialize(AtkObject* atkObject, gpointer data)
{
if (ATK_OBJECT_CLASS(web_page_accessibility_object_parent_class)->initialize)
ATK_OBJECT_CLASS(web_page_accessibility_object_parent_class)->initialize(atkObject, data);
WEB_PAGE_ACCESSIBILITY_OBJECT(atkObject)->m_page = reinterpret_cast<WebPage*>(data);
atk_object_set_role(atkObject, ATK_ROLE_FILLER);
}
static gint webPageAccessibilityObjectGetIndexInParent(AtkObject*)
{
// An AtkPlug is the only child an AtkSocket can have.
return 0;
}
static gint webPageAccessibilityObjectGetNChildren(AtkObject* atkObject)
{
AtkObject* rootObject = accessibilityRootObjectWrapper(atkObject);
if (!rootObject)
return 0;
return 1;
}
static AtkObject* webPageAccessibilityObjectRefChild(AtkObject* atkObject, gint index)
{
// It's supposed to have either one child or zero.
if (index && index != 1)
return 0;
AtkObject* rootObject = accessibilityRootObjectWrapper(atkObject);
if (!rootObject)
return 0;
atk_object_set_parent(rootObject, atkObject);
g_object_ref(rootObject);
return rootObject;
}
static void web_page_accessibility_object_init(WebPageAccessibilityObject*)
{
}
static void web_page_accessibility_object_class_init(WebPageAccessibilityObjectClass* klass)
{
AtkObjectClass* atkObjectClass = ATK_OBJECT_CLASS(klass);
// No need to implement get_parent() here since this is a subclass
// of AtkPlug and all the logic related to that function will be
// implemented by the ATK bridge.
atkObjectClass->initialize = webPageAccessibilityObjectInitialize;
atkObjectClass->get_index_in_parent = webPageAccessibilityObjectGetIndexInParent;
atkObjectClass->get_n_children = webPageAccessibilityObjectGetNChildren;
atkObjectClass->ref_child = webPageAccessibilityObjectRefChild;
}
WebPageAccessibilityObject* webPageAccessibilityObjectNew(WebPage* page)
{
AtkObject* object = ATK_OBJECT(g_object_new(WEB_TYPE_PAGE_ACCESSIBILITY_OBJECT, NULL));
atk_object_initialize(object, page);
return WEB_PAGE_ACCESSIBILITY_OBJECT(object);
}
void webPageAccessibilityObjectRefresh(WebPageAccessibilityObject* accessible)
{
// We just need to ensure that there's a connection in the ATK
// world between this accessibility object and the AtkObject of
// the accessibility object for the root of the DOM tree.
AtkObject* rootObject = accessibilityRootObjectWrapper(ATK_OBJECT(accessible));
if (!rootObject)
return;
atk_object_set_parent(rootObject, ATK_OBJECT(accessible));
}
#endif
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