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-rw-r--r--V8Binding/v8/V8WorkerCustom.cpp282
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diff --git a/V8Binding/v8/V8WorkerCustom.cpp b/V8Binding/v8/V8WorkerCustom.cpp
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+// 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)
generated by cgit v1.1 at 2025-09-19 20:49:48 +0000