Mac-4.7.4/src/3rdparty/webkit/WebCore/platform/HostWindow.h

/*
 * Copyright (C) 2008 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 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 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
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#ifndef HostWindow_h
#define HostWindow_h

#include <wtf/Noncopyable.h>
#include "Widget.h"

namespace WebCore {

class HostWindow : public Noncopyable {
public:
    virtual ~HostWindow() { }

    // Requests the host invalidate the window, not the contents.  If immediate is true do so synchronously, otherwise async.
    virtual void invalidateWindow(const IntRect& updateRect, bool immediate) = 0;

    // Requests the host invalidate the contents and the window.  If immediate is true do so synchronously, otherwise async.
    virtual void invalidateContentsAndWindow(const IntRect& updateRect, bool immediate) = 0;

    // Requests the host scroll backingstore by the specified delta, rect to scroll, and clip rect.
    virtual void scroll(const IntSize& scrollDelta, const IntRect& rectToScroll, const IntRect& clipRect) = 0;

    // Requests the host invalidate the contents, not the window.  This is the slow path for scrolling.
    virtual void invalidateContentsForSlowScroll(const IntRect& updateRect, bool immediate) = 0;
    
    // Methods for doing coordinate conversions to and from screen coordinates.
    virtual IntPoint screenToWindow(const IntPoint&) const = 0;
    virtual IntRect windowToScreen(const IntRect&) const = 0;

    // Method for retrieving the native client of the page.
    virtual PlatformPageClient platformPageClient() const = 0;
    
    // For scrolling a rect into view recursively.  Useful in the cases where a WebView is embedded inside some containing
    // platform-specific ScrollView.
    virtual void scrollRectIntoView(const IntRect&, const ScrollView*) const = 0;

    // To notify WebKit of scrollbar mode changes.
    virtual void scrollbarsModeDidChange() const = 0;
};

} // namespace WebCore

#endif // HostWindow_h