Introduce WebAccessibilityControllerImpl.

Removes accessibility-related WebCore dependencies from glue.

R=darin
TEST=none
BUG=24616

Review URL: http://codereview.chromium.org/348063

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30986 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 95 insertions, 0 deletions

diff --git a/webkit/api/src/WebAccessibilityCacheImpl.h b/webkit/api/src/WebAccessibilityCacheImpl.h
new file mode 100644
index 0000000..1173a41
--- /dev/null
+++ b/webkit/api/src/WebAccessibilityCacheImpl.h
@@ -0,0 +1,95 @@
+/*
+ * 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.
+ */
+
+#ifndef WebAccessibilityCacheImpl_h
+#define WebAccessibilityCacheImpl_h
+
+// FIXME: Move wtf/RefCounted.h include to AccessibilityObjectWrapper.h
+// once this file is upstream.
+#include <wtf/RefCounted.h>
+#include "AccessibilityObjectWrapper.h"
+#include "WebAccessibilityCache.h"
+#include <wtf/HashMap.h>
+#include <wtf/PassRefPtr.h>
+
+namespace WebKit {
+
+// FIXME: Should be eliminated to use AXObjectCache instead.
+class WebAccessibilityCacheImpl : public WebKit::WebAccessibilityCache {
+public:
+    virtual void initialize(WebView* view);
+    virtual bool isInitialized() const { return m_initialized; }
+
+    virtual WebAccessibilityObject getObjectById(int);
+    virtual bool isValidId(int) const;
+    virtual int addOrGetId(const WebKit::WebAccessibilityObject&);
+
+    virtual void remove(int);
+    virtual void clear();
+
+protected:
+    friend class WebKit::WebAccessibilityCache;
+
+    WebAccessibilityCacheImpl();
+    ~WebAccessibilityCacheImpl();
+
+private:
+    // FIXME: This can be just part of Chromium's AccessibilityObjectWrapper.
+    class WeakHandle : public WebCore::AccessibilityObjectWrapper {
+    public:
+        static PassRefPtr<WeakHandle> create(WebCore::AccessibilityObject*);
+        virtual void detach();
+    private:
+        WeakHandle(WebCore::AccessibilityObject*);
+    };
+
+    typedef HashMap<int, RefPtr<WeakHandle> > ObjectMap;
+    typedef HashMap<WebCore::AccessibilityObject*, int> IdMap;
+
+    // Hashmap for caching of elements in use by the AT, mapping id (int) to
+    // WebAccessibilityObject.
+    ObjectMap m_objectMap;
+    // Hashmap for caching of elements in use by the AT, mapping a
+    // AccessibilityObject pointer to its id (int). Needed for reverse lookup,
+    // to ensure unnecessary duplicate entries are not created in the
+    // ObjectMap and for focus changes in WebKit.
+    IdMap m_idMap;
+
+    // Unique identifier for retrieving an accessibility object from the page's
+    // hashmaps. Id is always 0 for the root of the accessibility object
+    // hierarchy (on a per-renderer process basis).
+    int m_nextNewId;
+
+    bool m_initialized;
+};
+
+}
+
+#endif