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3 * Copyright (C) 2012 Google Inc. All Rights Reserved.
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28 #ifndef ExecutionContext_h
29 #define ExecutionContext_h
31 #include "core/dom/ActiveDOMObject.h"
32 #include "core/dom/ExecutionContextClient.h"
33 #include "core/dom/SandboxFlags.h"
34 #include "core/dom/SecurityContext.h"
35 #include "core/events/ErrorEvent.h"
36 #include "core/fetch/CrossOriginAccessControl.h"
37 #include "core/frame/ConsoleTypes.h"
38 #include "core/frame/DOMTimer.h"
39 #include "platform/LifecycleContext.h"
40 #include "weborigin/KURL.h"
41 #include "wtf/HashSet.h"
42 #include "wtf/OwnPtr.h"
43 #include "wtf/PassOwnPtr.h"
51 class ContextLifecycleNotifier;
56 class ExecutionContextTask;
58 class PublicURLManager;
60 class ScriptCallStack;
63 class ExecutionContext : public LifecycleContext<ExecutionContext> {
66 virtual ~ExecutionContext();
68 // Delegating to ExecutionContextClient
69 void setClient(ExecutionContextClient* client) { m_client = client; }
70 bool isDocument() const { return m_client && m_client->isDocument(); }
71 bool isWorkerGlobalScope() { return m_client && m_client->isWorkerGlobalScope(); }
72 bool isJSExecutionForbidden() { return m_client && m_client->isJSExecutionForbidden(); }
73 SecurityOrigin* securityOrigin() const;
74 ContentSecurityPolicy* contentSecurityPolicy() const;
75 const KURL& url() const;
76 KURL completeURL(const String& url) const;
77 void userEventWasHandled();
78 void disableEval(const String& errorMessage);
79 DOMWindow* executingWindow() const;
80 String userAgent(const KURL&) const;
81 void postTask(PassOwnPtr<ExecutionContextTask>);
82 double timerAlignmentInterval() const;
84 bool shouldSanitizeScriptError(const String& sourceURL, AccessControlStatus);
85 void reportException(PassRefPtr<ErrorEvent>, PassRefPtr<ScriptCallStack>, AccessControlStatus);
87 void addConsoleMessage(MessageSource, MessageLevel, const String& message, const String& sourceURL, unsigned lineNumber);
88 void addConsoleMessage(MessageSource, MessageLevel, const String& message, ScriptState* = 0);
90 PublicURLManager& publicURLManager();
92 // Active objects are not garbage collected even if inaccessible, e.g. because their activity may result in callbacks being invoked.
93 bool hasPendingActivity();
95 void suspendActiveDOMObjects();
96 void resumeActiveDOMObjects();
97 void stopActiveDOMObjects();
99 bool activeDOMObjectsAreSuspended() const { return m_activeDOMObjectsAreSuspended; }
100 bool activeDOMObjectsAreStopped() const { return m_activeDOMObjectsAreStopped; }
101 bool isIteratingOverObservers() const;
103 // Called after the construction of an ActiveDOMObject to synchronize suspend state.
104 void suspendActiveDOMObjectIfNeeded(ActiveDOMObject*);
106 // MessagePort is conceptually a kind of ActiveDOMObject, but it needs to be tracked separately for message dispatch.
107 void processMessagePortMessagesSoon();
108 void dispatchMessagePortEvents();
109 void createdMessagePort(MessagePort*);
110 void destroyedMessagePort(MessagePort*);
111 const HashSet<MessagePort*>& messagePorts() const { return m_messagePorts; }
113 void ref() { refExecutionContext(); }
114 void deref() { derefExecutionContext(); }
116 // Gets the next id in a circular sequence from 1 to 2^31-1.
117 int circularSequentialID();
119 void didChangeTimerAlignmentInterval();
121 SandboxFlags sandboxFlags() const { return m_sandboxFlags; }
122 bool isSandboxed(SandboxFlags mask) const { return m_sandboxFlags & mask; }
123 void enforceSandboxFlags(SandboxFlags mask);
125 PassOwnPtr<LifecycleNotifier<ExecutionContext> > createLifecycleNotifier();
127 virtual EventQueue* eventQueue() const = 0;
131 ContextLifecycleNotifier& lifecycleNotifier();
134 friend class DOMTimer; // For installNewTimeout() and removeTimeoutByID() below.
136 bool dispatchErrorEvent(PassRefPtr<ErrorEvent>, AccessControlStatus);
138 void closeMessagePorts();
140 virtual void refExecutionContext() = 0;
141 virtual void derefExecutionContext() = 0;
142 // LifecycleContext implementation.
144 // Implementation details for DOMTimer. No other classes should call these functions.
145 int installNewTimeout(PassOwnPtr<ScheduledAction>, int timeout, bool singleShot);
146 void removeTimeoutByID(int timeoutID); // This makes underlying DOMTimer instance destructed.
148 ExecutionContextClient* m_client;
149 SandboxFlags m_sandboxFlags;
150 HashSet<MessagePort*> m_messagePorts;
152 int m_circularSequentialID;
153 typedef HashMap<int, OwnPtr<DOMTimer> > TimeoutMap;
154 TimeoutMap m_timeouts;
156 bool m_inDispatchErrorEvent;
157 class PendingException;
158 OwnPtr<Vector<OwnPtr<PendingException> > > m_pendingExceptions;
160 bool m_activeDOMObjectsAreSuspended;
161 bool m_activeDOMObjectsAreStopped;
163 OwnPtr<PublicURLManager> m_publicURLManager;
165 // The location of this member is important; to make sure contextDestroyed() notification on
166 // ExecutionContext's members (notably m_timeouts) is called before they are destructed,
167 // m_lifecycleNotifer should be placed *after* such members.
168 OwnPtr<ContextLifecycleNotifier> m_lifecycleNotifier;
171 } // namespace WebCore
173 #endif // ExecutionContext_h