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/*
* Copyright (C) 2012, 2019 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 "WebKitWebPageAccessibilityObject.h"
#if ENABLE(ACCESSIBILITY)
#include "WebPage.h"
#include <WebCore/AXObjectCache.h>
#include <WebCore/AccessibilityScrollView.h>
#include <WebCore/Document.h>
#include <WebCore/Frame.h>
#include <WebCore/Page.h>
#include <WebCore/ScrollView.h>
#include <wtf/glib/WTFGType.h>
using namespace WebKit;
using namespace WebCore;
struct _WebKitWebPageAccessibilityObjectPrivate {
WebPage* page;
};
WEBKIT_DEFINE_TYPE(WebKitWebPageAccessibilityObject, webkit_web_page_accessibility_object, ATK_TYPE_PLUG)
static void coreRootObjectWrapperDetachedCallback(AtkObject* wrapper, const char*, gboolean value, AtkObject* atkObject)
{
if (!value)
return;
g_signal_emit_by_name(atkObject, "children-changed::remove", 0, wrapper);
}
static AccessibilityObjectWrapper* rootWebAreaWrapper(AXCoreObject& rootObject)
{
if (!rootObject.isScrollView())
return nullptr;
if (auto* webAreaObject = rootObject.webAreaObject())
return webAreaObject->wrapper();
return nullptr;
}
static AtkObject* accessibilityRootObjectWrapper(AtkObject* atkObject)
{
if (!AXObjectCache::accessibilityEnabled())
AXObjectCache::enableAccessibility();
auto* accessible = WEBKIT_WEB_PAGE_ACCESSIBILITY_OBJECT(atkObject);
if (!accessible->priv->page)
return nullptr;
Page* corePage = accessible->priv->page->corePage();
if (!corePage)
return nullptr;
Frame& coreFrame = corePage->mainFrame();
if (!coreFrame.document())
return nullptr;
AXObjectCache* cache = coreFrame.document()->axObjectCache();
if (!cache)
return nullptr;
AXCoreObject* coreRootObject = cache->rootObject();
if (!coreRootObject)
return nullptr;
auto* wrapper = ATK_OBJECT(coreRootObject->wrapper());
if (!wrapper)
return nullptr;
if (atk_object_peek_parent(wrapper) != ATK_OBJECT(accessible)) {
atk_object_set_parent(wrapper, ATK_OBJECT(accessible));
g_signal_emit_by_name(accessible, "children-changed::add", 0, wrapper);
if (auto* webAreaWrapper = rootWebAreaWrapper(*coreRootObject)) {
g_signal_connect_object(webAreaWrapper, "state-change::defunct",
G_CALLBACK(coreRootObjectWrapperDetachedCallback), accessible, static_cast<GConnectFlags>(0));
}
}
return wrapper;
}
static void webkitWebPageAccessibilityObjectInitialize(AtkObject* atkObject, gpointer data)
{
if (ATK_OBJECT_CLASS(webkit_web_page_accessibility_object_parent_class)->initialize)
ATK_OBJECT_CLASS(webkit_web_page_accessibility_object_parent_class)->initialize(atkObject, data);
WEBKIT_WEB_PAGE_ACCESSIBILITY_OBJECT(atkObject)->priv->page = reinterpret_cast<WebPage*>(data);
atk_object_set_role(atkObject, ATK_ROLE_FILLER);
}
static gint webkitWebPageAccessibilityObjectGetIndexInParent(AtkObject*)
{
// An AtkPlug is the only child an AtkSocket can have.
return 0;
}
static gint webkitWebPageAccessibilityObjectGetNChildren(AtkObject* atkObject)
{
return accessibilityRootObjectWrapper(atkObject) ? 1 : 0;
}
static AtkObject* webkitWebPageAccessibilityObjectRefChild(AtkObject* atkObject, gint index)
{
// It's supposed to have either one child or zero.
if (index && index != 1)
return nullptr;
if (auto* rootObjectWrapper = accessibilityRootObjectWrapper(atkObject))
return ATK_OBJECT(g_object_ref(rootObjectWrapper));
return nullptr;
}
static AtkStateSet* webkitWebPageAccessibilityObjectRefStateSet(AtkObject* atkObject)
{
if (auto* rootObjectWrapper = accessibilityRootObjectWrapper(atkObject))
return atk_object_ref_state_set(rootObjectWrapper);
return atk_state_set_new();
}
static void webkit_web_page_accessibility_object_class_init(WebKitWebPageAccessibilityObjectClass* 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 = webkitWebPageAccessibilityObjectInitialize;
atkObjectClass->get_index_in_parent = webkitWebPageAccessibilityObjectGetIndexInParent;
atkObjectClass->get_n_children = webkitWebPageAccessibilityObjectGetNChildren;
atkObjectClass->ref_child = webkitWebPageAccessibilityObjectRefChild;
atkObjectClass->ref_state_set = webkitWebPageAccessibilityObjectRefStateSet;
}
AtkObject* webkitWebPageAccessibilityObjectNew(WebPage* page)
{
AtkObject* object = ATK_OBJECT(g_object_new(WEBKIT_TYPE_WEB_PAGE_ACCESSIBILITY_OBJECT, nullptr));
atk_object_initialize(object, page);
return object;
}
#endif // ENABLE(ACCESSIBILITY)
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