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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef WEBKIT_GLUE_WEBACCESSIBILITYMANAGER_IMPL_H_
#define WEBKIT_GLUE_WEBACCESSIBILITYMANAGER_IMPL_H_
#include "base/hash_tables.h"
#include "webkit/glue/webaccessibilitymanager.h"
class GlueAccessibilityObject;
////////////////////////////////////////////////////////////////////////////////
//
// WebAccessibilityManagerImpl
//
//
// Implements WebAccessibilityManager.
// Responds to incoming accessibility requests from the browser side. Retrieves
// the requested information from the active AccessibilityObject, through the
// GlueAccessibilityObject.
////////////////////////////////////////////////////////////////////////////////
namespace webkit_glue {
class WebAccessibilityManagerImpl : public WebAccessibilityManager {
public:
// From WebAccessibilityManager.
bool GetAccObjInfo(WebView* view, const WebAccessibility::InParams& in_params,
WebAccessibility::OutParams* out_params);
bool ClearAccObjMap(int acc_obj_id, bool clear_all);
int FocusAccObj(WebCore::AccessibilityObject* acc_obj);
protected:
// Needed so WebAccessibilityManager::Create can call our constructor.
friend class WebAccessibilityManager;
// Constructor creates a new GlueAccessibilityObjectRoot, and initializes
// the root |acc_obj_id_| to 1000, to avoid conflicts with platform-specific
// child ids.
WebAccessibilityManagerImpl();
~WebAccessibilityManagerImpl();
private:
// From WebAccessibilityManager.
bool InitAccObjRoot(WebView* view);
// Wrapper around the pointer that holds the root of the AccessibilityObject
// tree, to allow the use of a scoped_refptr.
struct GlueAccessibilityObjectRoot;
GlueAccessibilityObjectRoot* root_;
typedef base::hash_map<int, GlueAccessibilityObject*> IntToGlueAccObjMap;
typedef base::hash_map<WebCore::AccessibilityObject*, int> AccObjToIntMap;
// Hashmap for cashing of elements in use by the AT, mapping id (int) to a
// GlueAccessibilityObject pointer.
IntToGlueAccObjMap int_to_glue_acc_obj_map_;
// Hashmap for cashing 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
// IntToGlueAccObjMap (above) and for focus changes in WebKit.
AccObjToIntMap acc_obj_to_int_map_;
// 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 acc_obj_id_;
DISALLOW_COPY_AND_ASSIGN(WebAccessibilityManagerImpl);
};
} // namespace webkit_glue
#endif // WEBKIT_GLUE_WEBACCESSIBILITYMANAGER_IMPL_H_
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