| // Copyright (c) 2008, 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" |
| |
| #if ENABLE(WORKERS) |
| |
| #include "v8_binding.h" |
| #include "v8_custom.h" |
| #include "v8_proxy.h" |
| |
| #include "ExceptionCode.h" |
| #include "Frame.h" |
| #include "MessagePort.h" |
| #include "V8Document.h" |
| #include "V8HTMLDocument.h" |
| #include "V8ObjectEventListener.h" |
| #include "Worker.h" |
| #include "WorkerContextExecutionProxy.h" |
| |
| namespace WebCore { |
| |
| CALLBACK_FUNC_DECL(WorkerConstructor) { |
| INC_STATS(L"DOM.Worker.Constructor"); |
| |
| if (!WorkerContextExecutionProxy::isWebWorkersEnabled()) { |
| V8Proxy::ThrowError(V8Proxy::SYNTAX_ERROR, "Worker is not enabled."); |
| return v8::Undefined(); |
| } |
| |
| if (!args.IsConstructCall()) { |
| V8Proxy::ThrowError(V8Proxy::TYPE_ERROR, |
| "DOM object constructor cannot be called as a function."); |
| return v8::Undefined(); |
| } |
| |
| if (args.Length() == 0) { |
| V8Proxy::ThrowError(V8Proxy::SYNTAX_ERROR, "Not enough arguments"); |
| return v8::Undefined(); |
| } |
| |
| v8::TryCatch try_catch; |
| v8::Handle<v8::String> script_url = args[0]->ToString(); |
| if (try_catch.HasCaught()) { |
| v8::ThrowException(try_catch.Exception()); |
| return v8::Undefined(); |
| } |
| if (script_url.IsEmpty()) { |
| return v8::Undefined(); |
| } |
| |
| // Get the document. |
| Frame* frame = V8Proxy::retrieveFrame(); |
| if (!frame) |
| return v8::Undefined(); |
| Document* document = frame->document(); |
| |
| // Create the worker object. |
| // Note: it's OK to let this RefPtr go out of scope because we also call |
| // SetDOMWrapper(), which effectively holds a reference to obj. |
| ExceptionCode ec = 0; |
| RefPtr<Worker> obj = Worker::create( |
| ToWebCoreString(script_url), document, ec); |
| |
| // Setup the standard wrapper object internal fields. |
| v8::Handle<v8::Object> wrapper_object = args.Holder(); |
| V8Proxy::SetDOMWrapper( |
| wrapper_object, V8ClassIndex::WORKER, obj.get()); |
| |
| obj->ref(); |
| V8Proxy::SetJSWrapperForActiveDOMObject( |
| obj.get(), v8::Persistent<v8::Object>::New(wrapper_object)); |
| |
| return wrapper_object; |
| } |
| |
| // TODO(mbelshe) - merge these with XHR's CreateHiddenXHRDependency |
| |
| // Use an array to hold dependents. It works like a ref-counted scheme. |
| // A value can be added more than once to the xhr object. |
| static void CreateHiddenDependency(v8::Local<v8::Object> object, |
| v8::Local<v8::Value> value) { |
| ASSERT(V8Proxy::GetDOMWrapperType(object) == |
| V8ClassIndex::WORKER); |
| v8::Local<v8::Value> cache = |
| object->GetInternalField(V8Custom::kWorkerRequestCacheIndex); |
| if (cache->IsNull() || cache->IsUndefined()) { |
| cache = v8::Array::New(); |
| object->SetInternalField(V8Custom::kWorkerRequestCacheIndex, cache); |
| } |
| |
| v8::Local<v8::Array> cache_array = v8::Local<v8::Array>::Cast(cache); |
| cache_array->Set(v8::Integer::New(cache_array->Length()), value); |
| } |
| |
| static void RemoveHiddenDependency(v8::Local<v8::Object> object, |
| v8::Local<v8::Value> value) { |
| ASSERT(V8Proxy::GetDOMWrapperType(object) == V8ClassIndex::WORKER); |
| v8::Local<v8::Value> cache = |
| object->GetInternalField(V8Custom::kWorkerRequestCacheIndex); |
| ASSERT(cache->IsArray()); |
| v8::Local<v8::Array> cache_array = v8::Local<v8::Array>::Cast(cache); |
| for (int i = cache_array->Length() - 1; i >= 0; i--) { |
| v8::Local<v8::Value> cached = cache_array->Get(v8::Integer::New(i)); |
| if (cached->StrictEquals(value)) { |
| cache_array->Delete(i); |
| return; |
| } |
| } |
| |
| // We should only get here if we try to remove an event listener that was |
| // never added. |
| } |
| |
| ACCESSOR_GETTER(WorkerOnmessage) { |
| INC_STATS(L"DOM.Worker.onmessage._get"); |
| Worker* imp = V8Proxy::ToNativeObject<Worker>( |
| V8ClassIndex::WORKER, info.Holder()); |
| if (imp->onmessage()) { |
| V8ObjectEventListener* listener = |
| static_cast<V8ObjectEventListener*>(imp->onmessage()); |
| v8::Local<v8::Object> v8_listener = listener->getListenerObject(); |
| return v8_listener; |
| } |
| return v8::Undefined(); |
| } |
| |
| ACCESSOR_SETTER(WorkerOnmessage) { |
| INC_STATS(L"DOM.Worker.onmessage._set"); |
| Worker* imp = V8Proxy::ToNativeObject<Worker>( |
| V8ClassIndex::WORKER, info.Holder()); |
| V8ObjectEventListener* old_listener = |
| static_cast<V8ObjectEventListener*>(imp->onmessage()); |
| if (value->IsNull()) { |
| if (old_listener) { |
| v8::Local<v8::Object> old_v8_listener = old_listener->getListenerObject(); |
| RemoveHiddenDependency(info.Holder(), old_v8_listener); |
| } |
| |
| // Clear the listener |
| imp->setOnmessage(0); |
| |
| } else { |
| V8Proxy* proxy = V8Proxy::retrieve(imp->scriptExecutionContext()); |
| if (!proxy) |
| return; |
| |
| RefPtr<EventListener> listener = |
| proxy->FindOrCreateObjectEventListener(value, false); |
| if (listener) { |
| if (old_listener) { |
| v8::Local<v8::Object> old_v8_listener = |
| old_listener->getListenerObject(); |
| RemoveHiddenDependency(info.Holder(), old_v8_listener); |
| } |
| |
| imp->setOnmessage(listener); |
| CreateHiddenDependency(info.Holder(), value); |
| } |
| } |
| } |
| |
| ACCESSOR_GETTER(WorkerOnerror) { |
| INC_STATS(L"DOM.Worker.onerror._get"); |
| Worker* imp = V8Proxy::ToNativeObject<Worker>( |
| V8ClassIndex::WORKER, info.Holder()); |
| if (imp->onerror()) { |
| V8ObjectEventListener* listener = |
| static_cast<V8ObjectEventListener*>(imp->onerror()); |
| v8::Local<v8::Object> v8_listener = listener->getListenerObject(); |
| return v8_listener; |
| } |
| return v8::Undefined(); |
| } |
| |
| ACCESSOR_SETTER(WorkerOnerror) { |
| INC_STATS(L"DOM.Worker.onerror._set"); |
| Worker* imp = V8Proxy::ToNativeObject<Worker>( |
| V8ClassIndex::WORKER, info.Holder()); |
| V8ObjectEventListener* old_listener = |
| static_cast<V8ObjectEventListener*>(imp->onerror()); |
| if (value->IsNull()) { |
| if (old_listener) { |
| v8::Local<v8::Object> old_v8_listener = |
| old_listener->getListenerObject(); |
| RemoveHiddenDependency(info.Holder(), old_v8_listener); |
| } |
| |
| // Clear the listener |
| imp->setOnerror(0); |
| } else { |
| V8Proxy* proxy = V8Proxy::retrieve(imp->scriptExecutionContext()); |
| if (!proxy) |
| return; |
| |
| RefPtr<EventListener> listener = |
| proxy->FindOrCreateObjectEventListener(value, false); |
| if (listener) { |
| if (old_listener) { |
| v8::Local<v8::Object> old_v8_listener = old_listener->getListenerObject(); |
| RemoveHiddenDependency(info.Holder(), old_v8_listener); |
| } |
| |
| imp->setOnerror(listener); |
| CreateHiddenDependency(info.Holder(), value); |
| } |
| } |
| } |
| |
| CALLBACK_FUNC_DECL(WorkerAddEventListener) { |
| INC_STATS(L"DOM.Worker.addEventListener()"); |
| Worker* imp = V8Proxy::ToNativeObject<Worker>( |
| V8ClassIndex::WORKER, args.Holder()); |
| |
| V8Proxy* proxy = V8Proxy::retrieve(imp->scriptExecutionContext()); |
| if (!proxy) |
| return v8::Undefined(); |
| |
| RefPtr<EventListener> listener = |
| proxy->FindOrCreateObjectEventListener(args[1], false); |
| if (listener) { |
| String type = ToWebCoreString(args[0]); |
| bool useCapture = args[2]->BooleanValue(); |
| imp->addEventListener(type, listener, useCapture); |
| |
| CreateHiddenDependency(args.Holder(), args[1]); |
| } |
| return v8::Undefined(); |
| } |
| |
| CALLBACK_FUNC_DECL(WorkerRemoveEventListener) { |
| INC_STATS(L"DOM.Worker.removeEventListener()"); |
| Worker* imp = V8Proxy::ToNativeObject<Worker>( |
| V8ClassIndex::WORKER, args.Holder()); |
| |
| V8Proxy* proxy = V8Proxy::retrieve(imp->scriptExecutionContext()); |
| if (!proxy) |
| return v8::Undefined(); // probably leaked |
| |
| RefPtr<EventListener> listener = |
| proxy->FindObjectEventListener(args[1], false); |
| |
| if (listener) { |
| String type = ToWebCoreString(args[0]); |
| bool useCapture = args[2]->BooleanValue(); |
| imp->removeEventListener(type, listener.get(), useCapture); |
| |
| RemoveHiddenDependency(args.Holder(), args[1]); |
| } |
| |
| return v8::Undefined(); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(WORKERS) |