focuscontroller.h

来自「linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自Web」· C头文件 代码 · 共 65 行

/*
 * Copyright (C) 2006, 2007 Apple 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:
 * 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 COMPUTER, INC. ``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 COMPUTER, INC. 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 FocusController_h
#define FocusController_h

#include "FocusDirection.h"
#include <wtf/Forward.h>
#include <wtf/RefPtr.h>

namespace WebCore {

    class Frame;
    class KeyboardEvent;
    class Node;
    class Page;

    class FocusController {
    public:
        FocusController(Page*);

        void setFocusedFrame(PassRefPtr<Frame>);
        Frame* focusedFrame() const { return m_focusedFrame.get(); }
        Frame* focusedOrMainFrame();

        bool setInitialFocus(FocusDirection, KeyboardEvent*);
        bool advanceFocus(FocusDirection, KeyboardEvent*, bool initialFocus = false);
        
        bool setFocusedNode(Node*, PassRefPtr<Frame>);

        void setActive(bool);
        bool isActive() const { return m_isActive; }

    private:
        Page* m_page;
        RefPtr<Frame> m_focusedFrame;
        bool m_isActive;
    };

} // namespace WebCore
    
#endif // FocusController_h