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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 #include "config.h"
     27 #include "RenderSkinRadio.h"
     28 
     29 #include "android_graphics.h"
     30 #include "Document.h"
     31 #include "Element.h"
     32 #include "InputElement.h"
     33 #include "IntRect.h"
     34 #include "Node.h"
     35 #include "RenderSkinAndroid.h"
     36 #include "SkBitmap.h"
     37 #include "SkCanvas.h"
     38 #include "SkRect.h"
     39 #include <utils/AssetManager.h>
     40 #include <wtf/text/CString.h>
     41 
     42 extern android::AssetManager* globalAssetManager();
     43 
     44 static const char* checks[] = { "btn_check_off_holo.png",
     45                                 "btn_check_on_holo.png",
     46                                 "btn_radio_off_holo.png",
     47                                 "btn_radio_on_holo.png"};
     48 // Matches the width of the bitmap
     49 static SkScalar s_bitmapWidth;
     50 
     51 namespace WebCore {
     52 
     53 static SkBitmap s_bitmap[4];
     54 static bool s_decodingAttempted = false;
     55 static bool s_decoded = false;
     56 
     57 void RenderSkinRadio::Decode() {
     58     if (s_decodingAttempted)
     59         return;
     60 
     61     s_decodingAttempted = true;
     62     s_decoded = false;
     63 
     64     android::AssetManager* am = globalAssetManager();
     65     String drawableDir = RenderSkinAndroid::DrawableDirectory();
     66     for (int i = 0; i < 4; i++) {
     67         String path = drawableDir + checks[i];
     68         if (!RenderSkinAndroid::DecodeBitmap(am, path.utf8().data(), &s_bitmap[i]))
     69             return;
     70     }
     71     s_decoded = true;
     72     s_bitmapWidth = SkIntToScalar(s_bitmap[0].width());
     73 }
     74 
     75 void RenderSkinRadio::Draw(SkCanvas* canvas, Node* element, const IntRect& ir,
     76         bool isCheckBox)
     77 {
     78     if (!element)
     79         return;
     80 
     81     if (!s_decodingAttempted)
     82         Decode();
     83 
     84     if (!s_decoded)
     85         return;
     86 
     87     SkRect r(ir);
     88     // Set up a paint to with filtering to look better.
     89     SkPaint paint;
     90     paint.setFlags(SkPaint::kFilterBitmap_Flag);
     91     int saveScaleCount = 0;
     92 
     93     if (!element->isElementNode() ||
     94         !static_cast<Element*>(element)->isEnabledFormControl()) {
     95         paint.setAlpha(0x80);
     96     }
     97     SkScalar width = r.width();
     98     SkScalar scale = SkScalarDiv(width, s_bitmapWidth);
     99     saveScaleCount = canvas->save();
    100     canvas->translate(r.fLeft, r.fTop);
    101     canvas->scale(scale, scale);
    102 
    103     bool checked = false;
    104     if (InputElement* inputElement = element->toInputElement()) {
    105         checked = inputElement->isChecked();
    106     }
    107 
    108     canvas->drawBitmap(s_bitmap[checked + 2*(!isCheckBox)],
    109             0, 0, &paint);
    110     canvas->restoreToCount(saveScaleCount);
    111 }
    112 
    113 } //WebCore
    114