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      1 /*
      2  * Copyright (C) 2012 Google 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 are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef PageWidgetDelegate_h
     32 #define PageWidgetDelegate_h
     33 
     34 #include "public/platform/WebCanvas.h"
     35 #include "public/web/WebWidget.h"
     36 #include "wtf/OwnPtr.h"
     37 
     38 namespace blink {
     39 
     40 class LocalFrame;
     41 class Page;
     42 class PageOverlayList;
     43 class WebGestureEvent;
     44 class WebInputEvent;
     45 class WebKeyboardEvent;
     46 class WebMouseEvent;
     47 class WebMouseWheelEvent;
     48 class WebTouchEvent;
     49 
     50 class PageWidgetEventHandler {
     51 public:
     52     virtual void handleMouseMove(LocalFrame& mainFrame, const WebMouseEvent&);
     53     virtual void handleMouseLeave(LocalFrame& mainFrame, const WebMouseEvent&);
     54     virtual void handleMouseDown(LocalFrame& mainFrame, const WebMouseEvent&);
     55     virtual void handleMouseUp(LocalFrame& mainFrame, const WebMouseEvent&);
     56     virtual bool handleMouseWheel(LocalFrame& mainFrame, const WebMouseWheelEvent&);
     57     virtual bool handleKeyEvent(const WebKeyboardEvent&) = 0;
     58     virtual bool handleCharEvent(const WebKeyboardEvent&) = 0;
     59     virtual bool handleGestureEvent(const WebGestureEvent&) = 0;
     60     virtual bool handleTouchEvent(LocalFrame& mainFrame, const WebTouchEvent&);
     61     virtual ~PageWidgetEventHandler() { }
     62 };
     63 
     64 
     65 // Common implementation of WebViewImpl and WebPagePopupImpl.
     66 class PageWidgetDelegate {
     67 public:
     68     enum CanvasBackground {
     69         Opaque,
     70         Translucent,
     71     };
     72     // rootFrame arguments indicate a root localFrame from which to start performing the
     73     // specified operation. If rootFrame is 0, these methods will attempt to use the
     74     // Page's mainFrame(), if it is a LocalFrame.
     75     static void animate(Page*, double monotonicFrameBeginTime, LocalFrame* rootFrame = 0);
     76     static void layout(Page*, LocalFrame* rootFrame = 0);
     77     static void paint(Page*, PageOverlayList*, WebCanvas*, const WebRect&, CanvasBackground, LocalFrame* rootFrame = 0);
     78     static bool handleInputEvent(Page*, PageWidgetEventHandler&, const WebInputEvent&, LocalFrame* rootFrame = 0);
     79 
     80 private:
     81     PageWidgetDelegate() { }
     82 };
     83 
     84 }
     85 #endif
     86