1 files changed, 182 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/WebCore/dom/ScriptExecutionContext.cpp b/src/3rdparty/webkit/WebCore/dom/ScriptExecutionContext.cpp
new file mode 100644
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+++ b/src/3rdparty/webkit/WebCore/dom/ScriptExecutionContext.cpp
@@ -0,0 +1,182 @@
+/*
+ * Copyright (C) 2008 Apple 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 "ScriptExecutionContext.h"
+
+#include "ActiveDOMObject.h"
+#include "Document.h"
+#include "MessagePort.h"
+#include "SecurityOrigin.h"
+#include "WorkerContext.h"
+#include "WorkerThread.h"
+#include <wtf/MainThread.h>
+#include <wtf/PassRefPtr.h>
+
+namespace WebCore {
+
+class ProcessMessagesSoonTask : public ScriptExecutionContext::Task {
+public:
+    static PassRefPtr<ProcessMessagesSoonTask> create()
+    {
+        return adoptRef(new ProcessMessagesSoonTask);
+    }
+
+    virtual void performTask(ScriptExecutionContext* context)
+    {
+        context->dispatchMessagePortEvents();
+    }
+};
+
+ScriptExecutionContext::ScriptExecutionContext()
+{
+}
+
+ScriptExecutionContext::~ScriptExecutionContext()
+{
+    HashMap<ActiveDOMObject*, void*>::iterator activeObjectsEnd = m_activeDOMObjects.end();
+    for (HashMap<ActiveDOMObject*, void*>::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
+        ASSERT(iter->first->scriptExecutionContext() == this);
+        iter->first->contextDestroyed();
+    }
+
+    HashSet<MessagePort*>::iterator messagePortsEnd = m_messagePorts.end();
+    for (HashSet<MessagePort*>::iterator iter = m_messagePorts.begin(); iter != messagePortsEnd; ++iter) {
+        ASSERT((*iter)->scriptExecutionContext() == this);
+        (*iter)->contextDestroyed();
+    }
+}
+
+void ScriptExecutionContext::processMessagePortMessagesSoon()
+{
+    postTask(ProcessMessagesSoonTask::create());
+}
+
+void ScriptExecutionContext::dispatchMessagePortEvents()
+{
+    RefPtr<ScriptExecutionContext> protect(this);
+
+    // Make a frozen copy.
+    Vector<MessagePort*> ports;
+    copyToVector(m_messagePorts, ports);
+
+    unsigned portCount = ports.size();
+    for (unsigned i = 0; i < portCount; ++i) {
+        MessagePort* port = ports[i];
+        // The port may be destroyed, and another one created at the same address, but this is safe, as the worst that can happen
+        // as a result is that dispatchMessages() will be called needlessly.
+        if (m_messagePorts.contains(port) && port->queueIsOpen())
+            port->dispatchMessages();
+    }
+}
+
+void ScriptExecutionContext::createdMessagePort(MessagePort* port)
+{
+    ASSERT(port);
+#if ENABLE(WORKERS)
+    ASSERT((isDocument() && isMainThread())
+        || (isWorkerContext() && currentThread() == static_cast<WorkerContext*>(this)->thread()->threadID()));
+#endif
+
+    m_messagePorts.add(port);
+}
+
+void ScriptExecutionContext::destroyedMessagePort(MessagePort* port)
+{
+    ASSERT(port);
+#if ENABLE(WORKERS)
+    ASSERT((isDocument() && isMainThread())
+        || (isWorkerContext() && currentThread() == static_cast<WorkerContext*>(this)->thread()->threadID()));
+#endif
+
+    m_messagePorts.remove(port);
+}
+
+bool ScriptExecutionContext::canSuspendActiveDOMObjects()
+{
+    // No protection against m_activeDOMObjects changing during iteration: canSuspend() shouldn't execute arbitrary JS.
+    HashMap<ActiveDOMObject*, void*>::iterator activeObjectsEnd = m_activeDOMObjects.end();
+    for (HashMap<ActiveDOMObject*, void*>::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
+        ASSERT(iter->first->scriptExecutionContext() == this);
+        if (!iter->first->canSuspend())
+            return false;
+    }
+    return true;
+}
+
+void ScriptExecutionContext::suspendActiveDOMObjects()
+{
+    // No protection against m_activeDOMObjects changing during iteration: suspend() shouldn't execute arbitrary JS.
+    HashMap<ActiveDOMObject*, void*>::iterator activeObjectsEnd = m_activeDOMObjects.end();
+    for (HashMap<ActiveDOMObject*, void*>::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
+        ASSERT(iter->first->scriptExecutionContext() == this);
+        iter->first->suspend();
+    }
+}
+
+void ScriptExecutionContext::resumeActiveDOMObjects()
+{
+    // No protection against m_activeDOMObjects changing during iteration: resume() shouldn't execute arbitrary JS.
+    HashMap<ActiveDOMObject*, void*>::iterator activeObjectsEnd = m_activeDOMObjects.end();
+    for (HashMap<ActiveDOMObject*, void*>::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
+        ASSERT(iter->first->scriptExecutionContext() == this);
+        iter->first->resume();
+    }
+}
+
+void ScriptExecutionContext::stopActiveDOMObjects()
+{
+    // No protection against m_activeDOMObjects changing during iteration: stop() shouldn't execute arbitrary JS.
+    HashMap<ActiveDOMObject*, void*>::iterator activeObjectsEnd = m_activeDOMObjects.end();
+    for (HashMap<ActiveDOMObject*, void*>::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
+        ASSERT(iter->first->scriptExecutionContext() == this);
+        iter->first->stop();
+    }
+}
+
+void ScriptExecutionContext::createdActiveDOMObject(ActiveDOMObject* object, void* upcastPointer)
+{
+    ASSERT(object);
+    ASSERT(upcastPointer);
+    m_activeDOMObjects.add(object, upcastPointer);
+}
+
+void ScriptExecutionContext::destroyedActiveDOMObject(ActiveDOMObject* object)
+{
+    ASSERT(object);
+    m_activeDOMObjects.remove(object);
+}
+
+void ScriptExecutionContext::setSecurityOrigin(PassRefPtr<SecurityOrigin> securityOrigin)
+{
+    m_securityOrigin = securityOrigin;
+}
+
+ScriptExecutionContext::Task::~Task()
+{
+}
+
+} // namespace WebCore