compositor-worker: Create a separate CompositorWorkerGlobalScope for compositor workers.

Source/modules/compositorworker/CompositorWorkerGlobalScope.cpp

+// Copyright 2015 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 "modules/compositorworker/CompositorWorkerGlobalScope.h"
+
+#include "core/dom/RequestAnimationFrameCallback.h"
+#include "core/workers/WorkerThreadStartupData.h"
+#include "modules/EventTargetModules.h"
+#include "modules/compositorworker/CompositorWorkerThread.h"
+
+namespace blink {
+
+PassRefPtrWillBeRawPtr<CompositorWorkerGlobalScope> CompositorWorkerGlobalScope::create(CompositorWorkerThread* thread, PassOwnPtrWillBeRawPtr<WorkerThreadStartupData> startupData, double timeOrigin)
+{
+    RefPtrWillBeRawPtr<CompositorWorkerGlobalScope> context = adoptRefWillBeNoop(new CompositorWorkerGlobalScope(startupData->m_scriptURL, startupData->m_userAgent, thread, timeOrigin, startupData->m_starterOrigin, startupData->m_workerClients.release()));
+    context->applyContentSecurityPolicyFromString(startupData->m_contentSecurityPolicy, startupData->m_contentSecurityPolicyType);
+    return context.release();
+}
+
+CompositorWorkerGlobalScope::CompositorWorkerGlobalScope(const KURL& url, const String& userAgent, CompositorWorkerThread* thread, double timeOrigin, const SecurityOrigin* starterOrigin, PassOwnPtrWillBeRawPtr<WorkerClients> workerClients)
+    : DedicatedWorkerGlobalScope(url, userAgent, thread, timeOrigin, starterOrigin, workerClients)
+    , m_nextCallbackId(0)
+{
+}
+
+CompositorWorkerGlobalScope::~CompositorWorkerGlobalScope()
+{
+}
+
+// EventTarget
+const AtomicString& CompositorWorkerGlobalScope::interfaceName() const
+{
+    return EventTargetNames::CompositorWorkerGlobalScope;
+}
+
+int CompositorWorkerGlobalScope::requestCompositorFrame(RequestAnimationFrameCallback* callback)
+{
+    callback->m_cancelled = false;
+    callback->m_id = ++m_nextCallbackId;
+    m_callbacks.append(callback);
+    return callback->m_id;
+}
+
+void CompositorWorkerGlobalScope::cancelCompositorFrame(int id)
+{
+    for (size_t i = 0; i < m_callbacks.size(); ++i) {
+        if (m_callbacks[i]->m_id == id) {
+            m_callbacks.remove(i);
+            return;
+        }
+    }
+    for (size_t i = 0; i < m_callbacksToInvoke.size(); ++i) {
+        if (m_callbacksToInvoke[i]->m_id == id) {
+            m_callbacksToInvoke[i]->m_cancelled = true;
+            // will be removed at the end of executeCallbacks()
+            return;
+        }
+    }
+}
+
+void CompositorWorkerGlobalScope::executeCompositorFrameCallbacks(double monotonicTimeNow)
+{
+    if (!m_callbacks.size())
+        return;
+    // First, generate a list of callbacks to consider.  Callbacks registered from this point
+    // on are considered only for the "next" frame, not this one.
+    ASSERT(m_callbacksToInvoke.isEmpty());
+    m_callbacksToInvoke.swap(m_callbacks);
+
+    for (size_t i = 0; i < m_callbacksToInvoke.size(); ++i) {
+        RequestAnimationFrameCallback* callback = m_callbacksToInvoke[i].get();
+        if (!callback->m_cancelled)
+            callback->handleEvent(monotonicTimeNow);
+    }
+
+    m_callbacksToInvoke.clear();
+}
+
+DEFINE_TRACE(CompositorWorkerGlobalScope)
+{
+    DedicatedWorkerGlobalScope::trace(visitor);
+}
+
+} // namespace blink