Use dictionaries for context creation attributes. Eliminate custom bindings.

Source/bindings/core/v8/custom/V8HTMLCanvasElementCustom.cpp

 /*
  * Copyright (C) 2007-2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 29 matching lines @@
 #include "core/html/HTMLCanvasElement.h"
 #include "core/html/canvas/Canvas2DContextAttributes.h"
 #include "core/html/canvas/CanvasRenderingContext.h"
 #include "core/html/canvas/WebGLContextAttributes.h"
 #include "core/inspector/InspectorCanvasInstrumentation.h"
 #include "wtf/MathExtras.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
-void V8HTMLCanvasElement::getContextMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
-{
-    v8::Handle<v8::Object> holder = info.Holder();
-    v8::Isolate* isolate = info.GetIsolate();
-    HTMLCanvasElement* impl = V8HTMLCanvasElement::toImpl(holder);
-    TOSTRING_VOID(V8StringResource<>, contextIdResource, info[0]);
-    String contextId = contextIdResource;
-    RefPtrWillBeRawPtr<CanvasContextAttributes> attributes = nullptr;
-    if (contextId == "webgl" || contextId == "experimental-webgl") {
-        RefPtrWillBeRawPtr<WebGLContextAttributes> webGLAttributes = WebGLContextAttributes::create();
-        if (info.Length() > 1 && info[1]->IsObject()) {
-            v8::Handle<v8::Object> jsAttributes = info[1]->ToObject(isolate);
-            v8::Handle<v8::String> alpha = v8AtomicString(isolate, "alpha");
-            if (jsAttributes->Has(alpha) && !isUndefinedOrNull(jsAttributes->Get(alpha)))
-                webGLAttributes->setAlpha(jsAttributes->Get(alpha)->BooleanValue());
-            v8::Handle<v8::String> depth = v8AtomicString(isolate, "depth");
-            if (jsAttributes->Has(depth) && !isUndefinedOrNull(jsAttributes->Get(depth)))
-                webGLAttributes->setDepth(jsAttributes->Get(depth)->BooleanValue());
-            v8::Handle<v8::String> stencil = v8AtomicString(isolate, "stencil");
-            if (jsAttributes->Has(stencil) && !isUndefinedOrNull(jsAttributes->Get(stencil)))
-                webGLAttributes->setStencil(jsAttributes->Get(stencil)->BooleanValue());
-            v8::Handle<v8::String> antialias = v8AtomicString(isolate, "antialias");
-            if (jsAttributes->Has(antialias) && !isUndefinedOrNull(jsAttributes->Get(antialias)))
-                webGLAttributes->setAntialias(jsAttributes->Get(antialias)->BooleanValue());
-            v8::Handle<v8::String> premultipliedAlpha = v8AtomicString(isolate, "premultipliedAlpha");
-            if (jsAttributes->Has(premultipliedAlpha) && !isUndefinedOrNull(jsAttributes->Get(premultipliedAlpha)))
-                webGLAttributes->setPremultipliedAlpha(jsAttributes->Get(premultipliedAlpha)->BooleanValue());
-            v8::Handle<v8::String> preserveDrawingBuffer = v8AtomicString(isolate, "preserveDrawingBuffer");
-            if (jsAttributes->Has(preserveDrawingBuffer) && !isUndefinedOrNull(jsAttributes->Get(preserveDrawingBuffer)))
-                webGLAttributes->setPreserveDrawingBuffer(jsAttributes->Get(preserveDrawingBuffer)->BooleanValue());
-            v8::Handle<v8::String> failIfMajorPerformanceCaveat = v8AtomicString(isolate, "failIfMajorPerformanceCaveat");
-            if (jsAttributes->Has(failIfMajorPerformanceCaveat) && !isUndefinedOrNull(jsAttributes->Get(failIfMajorPerformanceCaveat)))
-                webGLAttributes->setFailIfMajorPerformanceCaveat(jsAttributes->Get(failIfMajorPerformanceCaveat)->BooleanValue());
-        }
-        attributes = webGLAttributes;
-    } else {
-        RefPtrWillBeRawPtr<Canvas2DContextAttributes> canvas2DAttributes = Canvas2DContextAttributes::create();
-        if (info.Length() > 1 && info[1]->IsObject()) {
-            v8::Handle<v8::Object> jsAttributes = info[1]->ToObject(isolate);
-            v8::Handle<v8::String> alpha = v8AtomicString(isolate, "alpha");
-            if (jsAttributes->Has(alpha) && !isUndefinedOrNull(jsAttributes->Get(alpha)))
-                canvas2DAttributes->setAlpha(jsAttributes->Get(alpha)->BooleanValue());
-        }
-        attributes = canvas2DAttributes;
-    }
-    CanvasRenderingContext* result = impl->getContext(contextId, attributes.get());
-    if (!result) {
-        v8SetReturnValueNull(info);
-        return;
-    }
-    if (result->is2d()) {
-        v8::Handle<v8::Value> v8Result = toV8(toCanvasRenderingContext2D(result), info.Holder(), info.GetIsolate());
-        if (InspectorInstrumentation::canvasAgentEnabled(&impl->document())) {
-            ScriptState* scriptState = ScriptState::current(isolate);
-            ScriptValue context(scriptState, v8Result);
-            ScriptValue wrapped = InspectorInstrumentation::wrapCanvas2DRenderingContextForInstrumentation(&impl->document(), context);
-            if (!wrapped.isEmpty()) {
-                v8SetReturnValue(info, wrapped.v8Value());
-                return;
-            }
-        }
-        v8SetReturnValue(info, v8Result);
-        return;
-    }
-    if (result->is3d()) {
-        v8::Handle<v8::Value> v8Result = toV8(toWebGLRenderingContext(result), info.Holder(), info.GetIsolate());
-        if (InspectorInstrumentation::canvasAgentEnabled(&impl->document())) {
-            ScriptState* scriptState = ScriptState::current(isolate);
-            ScriptValue glContext(scriptState, v8Result);
-            ScriptValue wrapped = InspectorInstrumentation::wrapWebGLRenderingContextForInstrumentation(&impl->document(), glContext);
-            if (!wrapped.isEmpty()) {
-                v8SetReturnValue(info, wrapped.v8Value());
-                return;
-            }
-        }
-        v8SetReturnValue(info, v8Result);
-        return;
-    }
-    ASSERT_NOT_REACHED();
-    v8SetReturnValueNull(info);
-}
-
 void V8HTMLCanvasElement::toDataURLMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     HTMLCanvasElement* canvas = V8HTMLCanvasElement::toImpl(holder);
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "toDataURL", "HTMLCanvasElement", info.Holder(), info.GetIsolate());
 
     TOSTRING_VOID(V8StringResource<>, type, info[0]);
     double quality;
     double* qualityPtr = 0;
     if (info.Length() > 1 && info[1]->IsNumber()) {
         quality = info[1]->NumberValue();
         qualityPtr = &quality;
     }
 
     String result = canvas->toDataURL(type, qualityPtr, exceptionState);
     exceptionState.throwIfNeeded();
     v8SetReturnValueStringOrUndefined(info, result, info.GetIsolate());
 }
 
 } // namespace blink