| /* |
| * Copyright (C) 2008, 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. |
| */ |
| |
| #include "config.h" |
| #include "bindings/v8/V8Utilities.h" |
| |
| #include "V8MessagePort.h" |
| #include "bindings/v8/ExceptionMessages.h" |
| #include "bindings/v8/ScriptState.h" |
| #include "bindings/v8/V8AbstractEventListener.h" |
| #include "bindings/v8/V8Binding.h" |
| #include "bindings/v8/custom/V8ArrayBufferCustom.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/ExceptionCode.h" |
| #include "core/dom/ExecutionContext.h" |
| #include "core/dom/MessagePort.h" |
| #include "core/frame/Frame.h" |
| #include "core/workers/WorkerGlobalScope.h" |
| #include "wtf/ArrayBuffer.h" |
| #include "wtf/text/WTFString.h" |
| #include <v8.h> |
| |
| |
| namespace WebCore { |
| |
| // Use an array to hold dependents. It works like a ref-counted scheme. |
| // A value can be added more than once to the DOM object. |
| void createHiddenDependency(v8::Handle<v8::Object> object, v8::Local<v8::Value> value, int cacheIndex, v8::Isolate* isolate) |
| { |
| v8::Local<v8::Value> cache = object->GetInternalField(cacheIndex); |
| if (cache->IsNull() || cache->IsUndefined()) { |
| cache = v8::Array::New(); |
| object->SetInternalField(cacheIndex, cache); |
| } |
| |
| v8::Local<v8::Array> cacheArray = v8::Local<v8::Array>::Cast(cache); |
| cacheArray->Set(v8::Integer::New(cacheArray->Length(), isolate), value); |
| } |
| |
| bool extractTransferables(v8::Local<v8::Value> value, MessagePortArray& ports, ArrayBufferArray& arrayBuffers, bool& notASequence, v8::Isolate* isolate) |
| { |
| if (isUndefinedOrNull(value)) { |
| ports.resize(0); |
| arrayBuffers.resize(0); |
| return true; |
| } |
| |
| uint32_t length = 0; |
| if (value->IsArray()) { |
| v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(value); |
| length = array->Length(); |
| } else { |
| if (toV8Sequence(value, length, notASequence, isolate).IsEmpty()) |
| return false; |
| } |
| |
| v8::Local<v8::Object> transferrables = v8::Local<v8::Object>::Cast(value); |
| |
| // Validate the passed array of transferrables. |
| for (unsigned int i = 0; i < length; ++i) { |
| v8::Local<v8::Value> transferrable = transferrables->Get(i); |
| // Validation of non-null objects, per HTML5 spec 10.3.3. |
| if (isUndefinedOrNull(transferrable)) { |
| setDOMException(DataCloneError, isolate); |
| return false; |
| } |
| // Validation of Objects implementing an interface, per WebIDL spec 4.1.15. |
| if (V8MessagePort::HasInstance(transferrable, isolate, worldType(isolate))) { |
| RefPtr<MessagePort> port = V8MessagePort::toNative(v8::Handle<v8::Object>::Cast(transferrable)); |
| // Check for duplicate MessagePorts. |
| if (ports.contains(port)) { |
| setDOMException(DataCloneError, isolate); |
| return false; |
| } |
| ports.append(port.release()); |
| } else if (V8ArrayBuffer::HasInstance(transferrable, isolate, worldType(isolate))) |
| arrayBuffers.append(V8ArrayBuffer::toNative(v8::Handle<v8::Object>::Cast(transferrable))); |
| else { |
| setDOMException(DataCloneError, isolate); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool getMessagePortArray(v8::Local<v8::Value> value, const String& propertyName, MessagePortArray& ports, v8::Isolate* isolate) |
| { |
| if (isUndefinedOrNull(value)) { |
| ports.resize(0); |
| return true; |
| } |
| if (!value->IsArray()) { |
| throwTypeError(ExceptionMessages::notASequenceTypeProperty(propertyName), isolate); |
| return false; |
| } |
| bool success = false; |
| ports = toRefPtrNativeArray<MessagePort, V8MessagePort>(value, propertyName, isolate, &success); |
| return success; |
| } |
| |
| bool getMessagePortArray(v8::Local<v8::Value> value, int argumentIndex, MessagePortArray& ports, v8::Isolate* isolate) |
| { |
| if (isUndefinedOrNull(value)) { |
| ports.resize(0); |
| return true; |
| } |
| if (!value->IsArray()) { |
| throwTypeError(ExceptionMessages::notAnArrayTypeArgumentOrValue(argumentIndex), isolate); |
| return false; |
| } |
| bool success = false; |
| ports = toRefPtrNativeArray<MessagePort, V8MessagePort>(value, argumentIndex, isolate, &success); |
| return success; |
| } |
| |
| void removeHiddenDependency(v8::Handle<v8::Object> object, v8::Local<v8::Value> value, int cacheIndex, v8::Isolate* isolate) |
| { |
| v8::Local<v8::Value> cache = object->GetInternalField(cacheIndex); |
| if (!cache->IsArray()) |
| return; |
| v8::Local<v8::Array> cacheArray = v8::Local<v8::Array>::Cast(cache); |
| for (int i = cacheArray->Length() - 1; i >= 0; --i) { |
| v8::Local<v8::Value> cached = cacheArray->Get(v8::Integer::New(i, isolate)); |
| if (cached->StrictEquals(value)) { |
| cacheArray->Delete(i); |
| return; |
| } |
| } |
| } |
| |
| void transferHiddenDependency(v8::Handle<v8::Object> object, EventListener* oldValue, v8::Local<v8::Value> newValue, int cacheIndex, v8::Isolate* isolate) |
| { |
| if (oldValue) { |
| V8AbstractEventListener* oldListener = V8AbstractEventListener::cast(oldValue); |
| if (oldListener) { |
| v8::Local<v8::Object> oldListenerObject = oldListener->getExistingListenerObject(); |
| if (!oldListenerObject.IsEmpty()) |
| removeHiddenDependency(object, oldListenerObject, cacheIndex, isolate); |
| } |
| } |
| // Non-callable input is treated as null and ignored |
| if (newValue->IsFunction()) |
| createHiddenDependency(object, newValue, cacheIndex, isolate); |
| } |
| |
| ExecutionContext* getExecutionContext() |
| { |
| if (WorkerScriptController* controller = WorkerScriptController::controllerForContext()) |
| return &controller->workerGlobalScope(); |
| |
| return currentDocument(); |
| } |
| |
| } // namespace WebCore |