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      1 /*
      2  * Copyright (C) 2007 Apple Inc.  All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef WebNodeHighlight_h
     30 #define WebNodeHighlight_h
     31 
     32 #include <WebCore/WindowMessageListener.h>
     33 #include <windows.h>
     34 
     35 class WebView;
     36 
     37 class WebNodeHighlight : WebCore::WindowMessageListener {
     38 public:
     39     WebNodeHighlight(WebView*);
     40     ~WebNodeHighlight();
     41 
     42     void setShowsWhileWebViewIsVisible(bool);
     43 
     44     bool isShowing() const;
     45 
     46     void update();
     47 
     48     void placeBehindWindow(HWND);
     49 
     50 private:
     51     void show();
     52     void hide();
     53 
     54     bool isWebViewVisible() const;
     55 
     56     virtual void windowReceivedMessage(HWND, UINT message, WPARAM, LPARAM);
     57 
     58     void onWebViewShowWindow(bool showing);
     59     void onWebViewWindowPosChanged(WINDOWPOS*);
     60     void onRootWindowPosChanged(WINDOWPOS*);
     61 
     62     WebView* m_inspectedWebView;
     63     HWND m_inspectedWebViewWindow;
     64     HWND m_overlay;
     65     HWND m_observedWindow;
     66     bool m_showsWhileWebViewIsVisible;
     67 
     68     friend static LRESULT CALLBACK OverlayWndProc(HWND, UINT, WPARAM, LPARAM);
     69 };
     70 
     71 #endif // !defined(WebNodeHighlight_h)
     72