Source/WebKit/chromium/public/WebWidgetClient.h

/*
 * 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.
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 * 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
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 */

#ifndef WebWidgetClient_h
#define WebWidgetClient_h

#include "WebCommon.h"
#include "WebNavigationPolicy.h"
#include "WebRect.h"
#include "WebScreenInfo.h"

namespace WebKit {

class WebWidget;
struct WebCursorInfo;

class WebWidgetClient {
public:
    // Called when a region of the WebWidget needs to be re-painted.
    virtual void didInvalidateRect(const WebRect&) { }

    // Called when a region of the WebWidget, given by clipRect, should be
    // scrolled by the specified dx and dy amounts.
    virtual void didScrollRect(int dx, int dy, const WebRect& clipRect) { }

    // Called when the compositor enables or disables.
    virtual void didActivateAcceleratedCompositing(bool active) { }

    // Called when a call to WebWidget::composite is required
    virtual void scheduleComposite() { }

    // Called when a call to WebWidget::animate is required
    virtual void scheduleAnimation() { }

    // Called when the widget acquires or loses focus, respectively.
    virtual void didFocus() { }
    virtual void didBlur() { }

    // Called when the cursor for the widget changes.
    virtual void didChangeCursor(const WebCursorInfo&) { }

    // Called when the widget should be closed.  WebWidget::close() should
    // be called asynchronously as a result of this notification.
    virtual void closeWidgetSoon() { }

    // Called to show the widget according to the given policy.
    virtual void show(WebNavigationPolicy) { }

    // Called to block execution of the current thread until the widget is
    // closed.
    virtual void runModal() { }

    // Called to get/set the position of the widget in screen coordinates.
    virtual WebRect windowRect() { return WebRect(); }
    virtual void setWindowRect(const WebRect&) { }

    // Called to get the position of the resizer rect in window coordinates.
    virtual WebRect windowResizerRect() { return WebRect(); }

    // Called to get the position of the root window containing the widget
    // in screen coordinates.
    virtual WebRect rootWindowRect() { return WebRect(); }

    // Called to query information about the screen where this widget is
    // displayed.
    virtual WebScreenInfo screenInfo() { return WebScreenInfo(); }

    // When this method gets called, WebWidgetClient implementation should
    // reset the input method by cancelling any ongoing composition.
    virtual void resetInputMethod() { }

protected:
    ~WebWidgetClient() { }
};

} // namespace WebKit

#endif