Long live Qt!

1 files changed, 111 insertions, 0 deletions

diff --git a/src/3rdparty/webkit/WebCore/dom/ScriptExecutionContext.h b/src/3rdparty/webkit/WebCore/dom/ScriptExecutionContext.h
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+++ b/src/3rdparty/webkit/WebCore/dom/ScriptExecutionContext.h
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+/*
+ * 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. 
+ *
+ */
+
+#ifndef ScriptExecutionContext_h
+#define ScriptExecutionContext_h
+
+#include "KURL.h"
+#include <wtf/HashMap.h>
+#include <wtf/HashSet.h>
+#include <wtf/PassRefPtr.h>
+#include <wtf/Threading.h>
+
+namespace WebCore {
+
+    class ActiveDOMObject;
+    class MessagePort;
+    class SecurityOrigin;
+    class String;
+
+    class ScriptExecutionContext {
+    public:
+        ScriptExecutionContext();
+        virtual ~ScriptExecutionContext();
+
+        virtual bool isDocument() const { return false; }
+        virtual bool isWorkerContext() const { return false; }
+
+        const KURL& url() const { return virtualURL(); }
+        KURL completeURL(const String& url) const { return virtualCompleteURL(url); }
+
+        SecurityOrigin* securityOrigin() const { return m_securityOrigin.get(); }
+
+        virtual void reportException(const String& errorMessage, int lineNumber, const String& sourceURL) = 0;
+
+        // Active objects are not garbage collected even if inaccessible, e.g. because their activity may result in callbacks being invoked.
+        bool canSuspendActiveDOMObjects();
+        // Active objects can be asked to suspend even if canSuspendActiveDOMObjects() returns 'false' -
+        // step-by-step JS debugging is one example.
+        void suspendActiveDOMObjects();
+        void resumeActiveDOMObjects();
+        void stopActiveDOMObjects();
+        void createdActiveDOMObject(ActiveDOMObject*, void* upcastPointer);
+        void destroyedActiveDOMObject(ActiveDOMObject*);
+        typedef const HashMap<ActiveDOMObject*, void*> ActiveDOMObjectsMap;
+        ActiveDOMObjectsMap& activeDOMObjects() const { return m_activeDOMObjects; }
+
+        // MessagePort is conceptually a kind of ActiveDOMObject, but it needs to be tracked separately for message dispatch.
+        void processMessagePortMessagesSoon();
+        void dispatchMessagePortEvents();
+        void createdMessagePort(MessagePort*);
+        void destroyedMessagePort(MessagePort*);
+        const HashSet<MessagePort*>& messagePorts() const { return m_messagePorts; }
+
+        void ref() { refScriptExecutionContext(); }
+        void deref() { derefScriptExecutionContext(); }
+
+        class Task : public ThreadSafeShared<Task> {
+        public:
+            virtual ~Task();
+            virtual void performTask(ScriptExecutionContext*) = 0;
+        };
+
+        virtual void postTask(PassRefPtr<Task>) = 0; // Executes the task on context's thread asynchronously.
+
+    protected:
+        // Explicitly override the security origin for this script context.
+        // Note: It is dangerous to change the security origin of a script context
+        //       that already contains content.
+        void setSecurityOrigin(PassRefPtr<SecurityOrigin>);
+
+    private:
+        virtual const KURL& virtualURL() const = 0;
+        virtual KURL virtualCompleteURL(const String&) const = 0;
+
+        RefPtr<SecurityOrigin> m_securityOrigin;
+
+        HashSet<MessagePort*> m_messagePorts;
+
+        HashMap<ActiveDOMObject*, void*> m_activeDOMObjects;
+
+        virtual void refScriptExecutionContext() = 0;
+        virtual void derefScriptExecutionContext() = 0;
+    };
+
+} // namespace WebCore
+
+
+#endif // ScriptExecutionContext_h