| /* |
| * Copyright (C) 2009 Google Inc. All rights reserved. |
| * |
| * 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. |
| * * Neither the name of Google Inc. 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 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 "WebAccessibilityCacheImpl.h" |
| |
| #include "AccessibilityObject.h" |
| #include "AXObjectCache.h" |
| #include "Document.h" |
| #include "Frame.h" |
| |
| #include "WebAccessibilityObject.h" |
| #include "WebFrameImpl.h" |
| #include "WebViewImpl.h" |
| |
| using namespace WebCore; |
| |
| namespace WebKit { |
| |
| const int invalidObjectId = -1; |
| const int firstObjectId = 1000; |
| |
| static PassRefPtr<AccessibilityObject> toAccessibilityObject(const WebAccessibilityObject& object) |
| { |
| return object; |
| } |
| |
| // WebView ---------------------------------------------------------------- |
| |
| WebAccessibilityCache* WebAccessibilityCache::create() |
| { |
| return new WebAccessibilityCacheImpl(); |
| } |
| |
| // WeakHandle ------------------------------------------------------------- |
| |
| PassRefPtr<WebAccessibilityCacheImpl::WeakHandle> WebAccessibilityCacheImpl::WeakHandle::create(AccessibilityObject* object) |
| { |
| RefPtr<WebAccessibilityCacheImpl::WeakHandle> weakHandle = adoptRef(new WebAccessibilityCacheImpl::WeakHandle(object)); |
| weakHandle->m_object->setWrapper(weakHandle.get()); |
| |
| return weakHandle.release(); |
| } |
| |
| WebAccessibilityCacheImpl::WeakHandle::WeakHandle(AccessibilityObject* object) |
| : AccessibilityObjectWrapper(object) |
| { |
| } |
| |
| // WebAccessibilityCacheImpl ---------------------------------------- |
| |
| void WebAccessibilityCacheImpl::WeakHandle::detach() |
| { |
| if (m_object) |
| m_object = 0; |
| } |
| |
| WebAccessibilityCacheImpl::WebAccessibilityCacheImpl() |
| : m_nextNewId(firstObjectId) |
| , m_initialized(false) |
| { |
| } |
| |
| WebAccessibilityCacheImpl::~WebAccessibilityCacheImpl() |
| { |
| } |
| |
| void WebAccessibilityCacheImpl::initialize(WebView* view) |
| { |
| AXObjectCache::enableAccessibility(); |
| WebAccessibilityObject root = view->accessibilityObject(); |
| if (root.isNull()) |
| return; |
| |
| RefPtr<AccessibilityObject> rootObject = toAccessibilityObject(root); |
| |
| // Insert root in hashmaps. |
| m_objectMap.set(m_nextNewId, WeakHandle::create(rootObject.get())); |
| m_idMap.set(rootObject.get(), m_nextNewId++); |
| |
| m_initialized = true; |
| } |
| |
| WebAccessibilityObject WebAccessibilityCacheImpl::getObjectById(int id) |
| { |
| ObjectMap::iterator it = m_objectMap.find(id); |
| |
| if (it == m_objectMap.end() || !it->second) |
| return WebAccessibilityObject(); |
| |
| return WebAccessibilityObject(it->second->accessibilityObject()); |
| } |
| |
| void WebAccessibilityCacheImpl::remove(int id) |
| { |
| ObjectMap::iterator it = m_objectMap.find(id); |
| |
| if (it == m_objectMap.end()) |
| return; |
| |
| if (it->second) { |
| // Erase element from reverse hashmap. |
| IdMap::iterator it2 = m_idMap.find(it->second->accessibilityObject()); |
| if (it2 != m_idMap.end()) |
| m_idMap.remove(it2); |
| } |
| |
| m_objectMap.remove(it); |
| } |
| |
| void WebAccessibilityCacheImpl::clear() |
| { |
| m_objectMap.clear(); |
| m_idMap.clear(); |
| } |
| |
| int WebAccessibilityCacheImpl::addOrGetId(const WebAccessibilityObject& object) |
| { |
| if (!object.isValid()) |
| return invalidObjectId; |
| |
| RefPtr<AccessibilityObject> o = toAccessibilityObject(object); |
| |
| IdMap::iterator it = m_idMap.find(o.get()); |
| |
| if (it != m_idMap.end()) |
| return it->second; |
| |
| // Insert new accessibility object in hashmaps and return its newly |
| // assigned accessibility object id. |
| m_objectMap.set(m_nextNewId, WeakHandle::create(o.get())); |
| m_idMap.set(o.get(), m_nextNewId); |
| |
| return m_nextNewId++; |
| } |
| |
| bool WebAccessibilityCacheImpl::isCached(const WebAccessibilityObject& object) |
| { |
| if (!object.isValid()) |
| return false; |
| |
| RefPtr<AccessibilityObject> o = toAccessibilityObject(object); |
| IdMap::iterator it = m_idMap.find(o.get()); |
| if (it == m_idMap.end()) |
| return false; |
| |
| return true; |
| } |
| |
| } |