Initial checkin of the out of process worker implementation.

WebWorkerClient/WebWorker are parallel interfaces of WebCore::{WorkerObjectProxy, WorkerContextProxy} that use Chrome data types.  When WebKit requests a WorkerObjectProxy, we create an instance of WebWorkerClientImpl.  This class creates an object that implements a Chromium version of WorkerObjectProxy (i.e. with Chrome data types) through WebViewDelegate.  That object is a WebWorkerProxy and talks over IPC to a WebWorker object in the worker process.  The WebWorker object creates the actual WebCore::Worker object using another class in glue: WebWorkerImpl.

When the WebCore::Worker object running in the worker process wants to talk back to the code running in the renderer, it talks to WebWorkerImpl which implements WebCore::WorkerObjectProxy.  WebWorkerImpl converts the data types to Chrome compatible ones, and then calls the WebWorkerClient version which does IPC to get to the renderer process.  This ends up at WebWorkerProxy, which calls WebWorkerClientImpl (the original class).

In future changes, sandboxing, multiple worker processes etc will be added.  Note that I also had to make two small changes to WebKit, since WorkerMessagingProxy couldn't be created as is for the nested worker case.  I'll either check it in myself or work with Jian to do so.
Review URL: http://codereview.chromium.org/27157

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@10847 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 91 insertions, 0 deletions

diff --git a/webkit/glue/webworker_impl.cc b/webkit/glue/webworker_impl.cc
new file mode 100644
index 0000000..3bb5d20
--- /dev/null
+++ b/webkit/glue/webworker_impl.cc
@@ -0,0 +1,91 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+
+#include "base/compiler_specific.h"
+#include "webkit/glue/glue_util.h"
+#include "webkit/glue/webworkerclient.h"
+#include "webkit/glue/webworker_impl.h"
+
+#if ENABLE(WORKERS)
+
+
+WebWorker* WebWorker::Create(WebWorkerClient* client) {
+  return new WebWorkerImpl(client);
+}
+
+
+WebWorkerImpl::WebWorkerImpl(WebWorkerClient* client) : client_(client) {
+}
+
+WebWorkerImpl::~WebWorkerImpl() {
+}
+
+void WebWorkerImpl::StartWorkerContext(const GURL& script_url,
+                                       const string16& user_agent,
+                                       const string16& source_code) {
+  // TODO(jianli): implement WorkerContextProxy here (i.e. create WorkerThread
+  // etc).  The WebKit code uses worker_object_proxy_ when it wants to talk to
+  // code running in the renderer process.
+}
+
+void WebWorkerImpl::TerminateWorkerContext() {
+}
+
+void WebWorkerImpl::PostMessageToWorkerContext(const string16& message) {
+}
+
+void WebWorkerImpl::WorkerObjectDestroyed() {
+}
+
+void WebWorkerImpl::postMessageToWorkerObject(const WebCore::String& message) {
+  client_->PostMessageToWorkerObject(webkit_glue::StringToString16(message));
+}
+
+void WebWorkerImpl::postExceptionToWorkerObject(
+    const WebCore::String& errorMessage,
+    int lineNumber,
+    const WebCore::String& sourceURL) {
+  client_->PostExceptionToWorkerObject(
+      webkit_glue::StringToString16(errorMessage),
+      lineNumber,
+      webkit_glue::StringToString16(sourceURL));
+}
+
+void WebWorkerImpl::postConsoleMessageToWorkerObject(
+    WebCore::MessageDestination destination,
+    WebCore::MessageSource source,
+    WebCore::MessageLevel level,
+    const WebCore::String& message,
+    int lineNumber,
+    const WebCore::String& sourceURL) {
+  client_->PostConsoleMessageToWorkerObject(
+      destination,
+      source,
+      level,
+      webkit_glue::StringToString16(message),
+      lineNumber,
+      webkit_glue::StringToString16(sourceURL));
+}
+
+void WebWorkerImpl::confirmMessageFromWorkerObject(bool hasPendingActivity) {
+  client_->ConfirmMessageFromWorkerObject(hasPendingActivity);
+}
+
+void WebWorkerImpl::reportPendingActivity(bool hasPendingActivity) {
+  client_->ReportPendingActivity(hasPendingActivity);
+}
+
+void WebWorkerImpl::workerContextDestroyed() {
+  client_->WorkerContextDestroyed();
+}
+
+#else
+
+WebWorker* WebWorker::Create(WebWorkerClient* client) {
+  return NULL;
+}
+
+#endif