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      1 /*
      2  * Copyright 2006, The Android Open Source Project
      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  *  * Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  *  * Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef RenderSkinAndroid_h
     27 #define RenderSkinAndroid_h
     28 
     29 #include "PlatformString.h"
     30 
     31 namespace android {
     32     class AssetManager;
     33 }
     34 
     35 class SkBitmap;
     36 
     37 namespace WebCore {
     38 class Node;
     39 class PlatformGraphicsContext;
     40 
     41 /*  RenderSkinAndroid is the base class for all RenderSkins.  Form elements each have a
     42  *  subclass for drawing themselves.
     43  */
     44 class RenderSkinAndroid
     45 {
     46 public:
     47     RenderSkinAndroid();
     48     virtual ~RenderSkinAndroid() {}
     49 
     50     enum State {
     51         kDisabled,
     52         kNormal,
     53         kFocused,
     54         kPressed,
     55 
     56         kNumStates
     57     };
     58 
     59     /**
     60      * Initialize the Android skinning system. The AssetManager may be used to find resources used
     61      * in rendering.
     62      */
     63     static void Init(android::AssetManager*, String drawableDirectory);
     64 
     65     /* DecodeBitmap determines which file to use, with the given fileName of the form
     66      * "images/bitmap.png", and uses the asset manager to select the exact one.  It
     67      * returns true if it successfully decoded the bitmap, false otherwise.
     68      */
     69     static bool DecodeBitmap(android::AssetManager* am, const char* fileName, SkBitmap* bitmap);
     70 
     71     /*  draw() tells the skin to draw itself, and returns true if the skin needs
     72      *  a redraw to animations, false otherwise
     73      */
     74     virtual bool draw(PlatformGraphicsContext*) { return false; }
     75 
     76     /*  notifyState() checks to see if the element is checked, focused, and enabled
     77      *  it must be implemented in the subclass
     78      */
     79     virtual void notifyState(Node* element) { }
     80 
     81     /*  setDim() tells the skin its width and height
     82      */
     83     virtual void setDim(int width, int height) { m_width = width; m_height = height; }
     84 
     85 protected:
     86     int                     m_height;
     87     int                     m_width;
     88 
     89 };
     90 
     91 } // WebCore
     92 
     93 #endif
     94