--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKit/chromium/src/WebAccessibilityCacheImpl.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,170 @@
+/*
+ * 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)
+{
+    // FIXME: Remove resetting ref-count from AccessibilityObjectWrapper
+    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());
+}
+
+bool WebAccessibilityCacheImpl::isValidId(int id) const
+{
+    return id >= firstObjectId;
+}
+
+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.isNull())
+        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++;
+}
+
+}