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      1 /*
      2  * Copyright (C) 2009 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 #include "config.h"
     32 #include "bindings/core/v8/V8CanvasRenderingContext2D.h"
     33 
     34 #include "bindings/core/v8/V8CanvasGradient.h"
     35 #include "bindings/core/v8/V8CanvasPattern.h"
     36 #include "bindings/core/v8/V8HTMLCanvasElement.h"
     37 #include "bindings/core/v8/V8HTMLImageElement.h"
     38 #include "bindings/core/v8/V8HTMLVideoElement.h"
     39 #include "bindings/core/v8/V8ImageData.h"
     40 #include "bindings/v8/V8Binding.h"
     41 #include "core/html/canvas/CanvasGradient.h"
     42 #include "core/html/canvas/CanvasPattern.h"
     43 #include "core/html/canvas/CanvasRenderingContext2D.h"
     44 #include "core/html/canvas/CanvasStyle.h"
     45 #include "platform/geometry/FloatRect.h"
     46 
     47 namespace WebCore {
     48 
     49 static v8::Handle<v8::Value> toV8Object(CanvasStyle* style, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
     50 {
     51     if (style->canvasGradient())
     52         return toV8(style->canvasGradient(), creationContext, isolate);
     53 
     54     if (style->canvasPattern())
     55         return toV8(style->canvasPattern(), creationContext, isolate);
     56 
     57     return v8String(isolate, style->color());
     58 }
     59 
     60 static PassRefPtr<CanvasStyle> toCanvasStyle(v8::Handle<v8::Value> value, v8::Isolate* isolate)
     61 {
     62     RefPtr<CanvasStyle> canvasStyle = CanvasStyle::createFromGradient(V8CanvasGradient::toNativeWithTypeCheck(isolate, value));
     63     if (canvasStyle)
     64         return canvasStyle;
     65     return CanvasStyle::createFromPattern(V8CanvasPattern::toNativeWithTypeCheck(isolate, value));
     66 }
     67 
     68 void V8CanvasRenderingContext2D::strokeStyleAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
     69 {
     70     CanvasRenderingContext2D* impl = V8CanvasRenderingContext2D::toNative(info.Holder());
     71     v8SetReturnValue(info, toV8Object(impl->strokeStyle(), info.Holder(), info.GetIsolate()));
     72 }
     73 
     74 void V8CanvasRenderingContext2D::strokeStyleAttributeSetterCustom(v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<void>& info)
     75 {
     76     CanvasRenderingContext2D* impl = V8CanvasRenderingContext2D::toNative(info.Holder());
     77     if (RefPtr<CanvasStyle> canvasStyle = toCanvasStyle(value, info.GetIsolate())) {
     78         impl->setStrokeStyle(canvasStyle);
     79     } else {
     80         TOSTRING_VOID(V8StringResource<>, colorString, value);
     81         impl->setStrokeColor(colorString);
     82     }
     83 }
     84 
     85 void V8CanvasRenderingContext2D::fillStyleAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
     86 {
     87     CanvasRenderingContext2D* impl = V8CanvasRenderingContext2D::toNative(info.Holder());
     88     v8SetReturnValue(info, toV8Object(impl->fillStyle(), info.Holder(), info.GetIsolate()));
     89 }
     90 
     91 void V8CanvasRenderingContext2D::fillStyleAttributeSetterCustom(v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<void>& info)
     92 {
     93     CanvasRenderingContext2D* impl = V8CanvasRenderingContext2D::toNative(info.Holder());
     94     if (RefPtr<CanvasStyle> canvasStyle = toCanvasStyle(value, info.GetIsolate())) {
     95         impl->setFillStyle(canvasStyle);
     96     } else {
     97         TOSTRING_VOID(V8StringResource<>, colorString, value);
     98         impl->setFillColor(colorString);
     99     }
    100 }
    101 
    102 } // namespace WebCore
    103