| /* |
| * Copyright (C) 2009 Google Inc. 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. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef V8ArrayBufferViewCustom_h |
| #define V8ArrayBufferViewCustom_h |
| |
| #include "ArrayBuffer.h" |
| |
| #include "V8ArrayBuffer.h" |
| #include "V8Binding.h" |
| #include "V8Proxy.h" |
| |
| namespace WebCore { |
| |
| // Template function used by the ArrayBufferView*Constructor callbacks. |
| template<class ArrayClass, class ElementType> |
| v8::Handle<v8::Value> constructWebGLArrayWithArrayBufferArgument(const v8::Arguments& args, WrapperTypeInfo* type, v8::ExternalArrayType arrayType, bool hasIndexer) |
| { |
| ArrayBuffer* buf = V8ArrayBuffer::toNative(args[0]->ToObject()); |
| if (!buf) |
| return throwError("Could not convert argument 0 to a ArrayBuffer"); |
| bool ok; |
| uint32_t offset = 0; |
| int argLen = args.Length(); |
| if (argLen > 1) { |
| offset = toUInt32(args[1], ok); |
| if (!ok) |
| return throwError("Could not convert argument 1 to a number"); |
| } |
| if ((buf->byteLength() - offset) % sizeof(ElementType)) |
| return throwError("ArrayBuffer length minus the byteOffset is not a multiple of the element size.", V8Proxy::RangeError); |
| uint32_t length = (buf->byteLength() - offset) / sizeof(ElementType); |
| if (argLen > 2) { |
| length = toUInt32(args[2], ok); |
| if (!ok) |
| return throwError("Could not convert argument 2 to a number"); |
| } |
| |
| RefPtr<ArrayClass> array = ArrayClass::create(buf, offset, length); |
| if (!array) { |
| V8Proxy::setDOMException(INDEX_SIZE_ERR); |
| return notHandledByInterceptor(); |
| } |
| // Transform the holder into a wrapper object for the array. |
| V8DOMWrapper::setDOMWrapper(args.Holder(), type, array.get()); |
| if (hasIndexer) |
| args.Holder()->SetIndexedPropertiesToExternalArrayData(array.get()->baseAddress(), arrayType, array.get()->length()); |
| return toV8(array.release(), args.Holder()); |
| } |
| |
| // Template function used by the ArrayBufferView*Constructor callbacks. |
| template<class ArrayClass, class ElementType> |
| v8::Handle<v8::Value> constructWebGLArray(const v8::Arguments& args, WrapperTypeInfo* type, v8::ExternalArrayType arrayType) |
| { |
| if (!args.IsConstructCall()) |
| return throwError("DOM object constructor cannot be called as a function."); |
| |
| int argLen = args.Length(); |
| if (!argLen) { |
| // This happens when we return a previously constructed |
| // ArrayBufferView, e.g. from the call to <Type>Array.subset(). |
| // The V8DOMWrapper will set the internal pointer in the |
| // created object. Unfortunately it doesn't look like it's |
| // possible to distinguish between this case and that where |
| // the user calls "new <Type>Array()" from JavaScript. We must |
| // construct an empty view to avoid crashes when fetching the |
| // length. |
| RefPtr<ArrayClass> array = ArrayClass::create(0); |
| // Transform the holder into a wrapper object for the array. |
| V8DOMWrapper::setDOMWrapper(args.Holder(), type, array.get()); |
| // Do not call SetIndexedPropertiesToExternalArrayData on this |
| // object. Not only is there no point from a performance |
| // perspective, but doing so causes errors in the subset() case. |
| return toV8(array.release(), args.Holder()); |
| } |
| |
| // Supported constructors: |
| // WebGL<T>Array(n) where n is an integer: |
| // -- create an empty array of n elements |
| // WebGL<T>Array(arr) where arr is an array: |
| // -- create a WebGL<T>Array containing the contents of "arr" |
| // WebGL<T>Array(buf, offset, length) |
| // -- create a WebGL<T>Array pointing to the ArrayBuffer |
| // "buf", starting at the specified offset, for the given |
| // length |
| |
| if (args[0]->IsNull()) { |
| // Invalid first argument |
| // FIXME: use forthcoming V8Proxy::throwTypeError(). |
| return V8Proxy::throwError(V8Proxy::TypeError, "Type error"); |
| } |
| |
| // See whether the first argument is a ArrayBuffer. |
| if (V8ArrayBuffer::HasInstance(args[0])) |
| return constructWebGLArrayWithArrayBufferArgument<ArrayClass, ElementType>(args, type, arrayType, true); |
| |
| uint32_t len = 0; |
| v8::Handle<v8::Object> srcArray; |
| bool doInstantiation = false; |
| |
| if (args[0]->IsObject()) { |
| srcArray = args[0]->ToObject(); |
| if (srcArray.IsEmpty()) |
| return throwError("Could not convert argument 0 to an array"); |
| len = toUInt32(srcArray->Get(v8::String::New("length"))); |
| doInstantiation = true; |
| } else { |
| bool ok = false; |
| int32_t tempLength = toInt32(args[0], ok); // NaN/+inf/-inf returns 0, this is intended by WebIDL |
| if (ok && tempLength >= 0) { |
| len = static_cast<uint32_t>(tempLength); |
| doInstantiation = true; |
| } |
| } |
| |
| RefPtr<ArrayClass> array; |
| if (doInstantiation) |
| array = ArrayClass::create(len); |
| if (!array.get()) |
| return throwError("ArrayBufferView size is not a small enough positive integer.", V8Proxy::RangeError); |
| |
| if (!srcArray.IsEmpty()) { |
| // Need to copy the incoming array into the newly created ArrayBufferView. |
| for (unsigned i = 0; i < len; i++) { |
| v8::Local<v8::Value> val = srcArray->Get(v8::Integer::NewFromUnsigned(i)); |
| array->set(i, val->NumberValue()); |
| } |
| } |
| |
| // Transform the holder into a wrapper object for the array. |
| V8DOMWrapper::setDOMWrapper(args.Holder(), type, array.get()); |
| args.Holder()->SetIndexedPropertiesToExternalArrayData(array.get()->baseAddress(), arrayType, array.get()->length()); |
| return toV8(array.release(), args.Holder()); |
| } |
| |
| template <class CPlusPlusArrayType, class JavaScriptWrapperArrayType> |
| v8::Handle<v8::Value> setWebGLArrayHelper(const v8::Arguments& args) |
| { |
| if (args.Length() < 1) { |
| V8Proxy::setDOMException(SYNTAX_ERR); |
| return notHandledByInterceptor(); |
| } |
| |
| CPlusPlusArrayType* impl = JavaScriptWrapperArrayType::toNative(args.Holder()); |
| |
| if (JavaScriptWrapperArrayType::HasInstance(args[0])) { |
| // void set(in WebGL<T>Array array, [Optional] in unsigned long offset); |
| CPlusPlusArrayType* src = JavaScriptWrapperArrayType::toNative(args[0]->ToObject()); |
| uint32_t offset = 0; |
| if (args.Length() == 2) |
| offset = toUInt32(args[1]); |
| ExceptionCode ec = 0; |
| impl->set(src, offset, ec); |
| V8Proxy::setDOMException(ec); |
| return v8::Undefined(); |
| } |
| |
| if (args[0]->IsObject()) { |
| // void set(in sequence<long> array, [Optional] in unsigned long offset); |
| v8::Local<v8::Object> array = args[0]->ToObject(); |
| uint32_t offset = 0; |
| if (args.Length() == 2) |
| offset = toUInt32(args[1]); |
| uint32_t length = toUInt32(array->Get(v8::String::New("length"))); |
| if (offset > impl->length() |
| || offset + length > impl->length() |
| || offset + length < offset) |
| // Out of range offset or overflow |
| V8Proxy::setDOMException(INDEX_SIZE_ERR); |
| else |
| for (uint32_t i = 0; i < length; i++) |
| impl->set(offset + i, array->Get(v8::Integer::NewFromUnsigned(i))->NumberValue()); |
| |
| return v8::Undefined(); |
| } |
| |
| V8Proxy::setDOMException(SYNTAX_ERR); |
| return notHandledByInterceptor(); |
| } |
| |
| } |
| |
| #endif // V8ArrayBufferViewCustom_h |
