| /* |
| * 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 <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(AccessibilityObject& rootObject) |
| { |
| if (!rootObject.isAccessibilityScrollView()) |
| return nullptr; |
| |
| if (auto* webAreaObject = downcast<AccessibilityScrollView>(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; |
| |
| AccessibilityObject* 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 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; |
| } |
| |
| 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) |