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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 "platform/Supplementable.h"
41 #include "platform/heap/Handle.h"
42 #include "platform/weborigin/KURL.h"
43 #include "wtf/Functional.h"
44 #include "wtf/OwnPtr.h"
45 #include "wtf/PassOwnPtr.h"
53 class ContextLifecycleNotifier;
58 class ExecutionContextTask;
60 class PublicURLManager;
62 class ScriptCallStack;
64 class ExecutionContext
65 : public WillBeGarbageCollectedMixin
66 , public LifecycleContext<ExecutionContext>
67 , public Supplementable<ExecutionContext> {
69 virtual void trace(Visitor*);
71 // Delegating to ExecutionContextClient
72 bool isDocument() const { return m_client && m_client->isDocument(); }
73 bool isWorkerGlobalScope() const { return m_client && m_client->isWorkerGlobalScope(); }
74 bool isJSExecutionForbidden() { return m_client && m_client->isJSExecutionForbidden(); }
75 SecurityOrigin* securityOrigin() const;
76 ContentSecurityPolicy* contentSecurityPolicy() const;
77 const KURL& url() const;
78 KURL completeURL(const String& url) const;
79 void disableEval(const String& errorMessage);
80 LocalDOMWindow* executingWindow() const;
81 String userAgent(const KURL&) const;
82 void postTask(PassOwnPtr<ExecutionContextTask>);
83 void postTask(const Closure&);
84 double timerAlignmentInterval() const;
86 virtual void reportBlockedScriptExecutionToInspector(const String& directiveText) = 0;
88 virtual SecurityContext& securityContext() = 0;
89 KURL contextURL() const { return virtualURL(); }
90 KURL contextCompleteURL(const String& url) const { return virtualCompleteURL(url); }
92 bool shouldSanitizeScriptError(const String& sourceURL, AccessControlStatus);
93 void reportException(PassRefPtrWillBeRawPtr<ErrorEvent>, PassRefPtrWillBeRawPtr<ScriptCallStack>, AccessControlStatus);
95 void addConsoleMessage(MessageSource, MessageLevel, const String& message, const String& sourceURL, unsigned lineNumber);
96 void addConsoleMessage(MessageSource, MessageLevel, const String& message, ScriptState* = 0);
98 PublicURLManager& publicURLManager();
100 // Active objects are not garbage collected even if inaccessible, e.g. because their activity may result in callbacks being invoked.
101 bool hasPendingActivity();
103 void suspendActiveDOMObjects();
104 void resumeActiveDOMObjects();
105 void stopActiveDOMObjects();
106 unsigned activeDOMObjectCount();
108 virtual void suspendScheduledTasks();
109 virtual void resumeScheduledTasks();
110 virtual bool tasksNeedSuspension() { return false; }
112 bool activeDOMObjectsAreSuspended() const { return m_activeDOMObjectsAreSuspended; }
113 bool activeDOMObjectsAreStopped() const { return m_activeDOMObjectsAreStopped; }
114 bool isIteratingOverObservers() const;
116 // Called after the construction of an ActiveDOMObject to synchronize suspend state.
117 void suspendActiveDOMObjectIfNeeded(ActiveDOMObject*);
119 void ref() { refExecutionContext(); }
120 void deref() { derefExecutionContext(); }
123 // Gets the next id in a circular sequence from 1 to 2^31-1.
124 int circularSequentialID();
126 void didChangeTimerAlignmentInterval();
128 SandboxFlags sandboxFlags() const { return m_sandboxFlags; }
129 bool isSandboxed(SandboxFlags mask) const { return m_sandboxFlags & mask; }
130 void enforceSandboxFlags(SandboxFlags mask);
132 PassOwnPtr<LifecycleNotifier<ExecutionContext> > createLifecycleNotifier();
134 virtual EventQueue* eventQueue() const = 0;
138 virtual ~ExecutionContext();
140 void setClient(ExecutionContextClient* client) { m_client = client; }
142 virtual const KURL& virtualURL() const = 0;
143 virtual KURL virtualCompleteURL(const String&) const = 0;
145 ContextLifecycleNotifier& lifecycleNotifier();
148 friend class DOMTimer; // For installNewTimeout() and removeTimeoutByID() below.
150 bool dispatchErrorEvent(PassRefPtrWillBeRawPtr<ErrorEvent>, AccessControlStatus);
153 virtual void refExecutionContext() = 0;
154 virtual void derefExecutionContext() = 0;
156 // LifecycleContext implementation.
158 // Implementation details for DOMTimer. No other classes should call these functions.
159 int installNewTimeout(PassOwnPtr<ScheduledAction>, int timeout, bool singleShot);
160 void removeTimeoutByID(int timeoutID); // This makes underlying DOMTimer instance destructed.
162 ExecutionContextClient* m_client;
163 SandboxFlags m_sandboxFlags;
165 int m_circularSequentialID;
166 typedef HashMap<int, OwnPtr<DOMTimer> > TimeoutMap;
167 TimeoutMap m_timeouts;
169 bool m_inDispatchErrorEvent;
170 class PendingException;
171 OwnPtrWillBeMember<WillBeHeapVector<OwnPtrWillBeMember<PendingException> > > m_pendingExceptions;
173 bool m_activeDOMObjectsAreSuspended;
174 bool m_activeDOMObjectsAreStopped;
176 OwnPtr<PublicURLManager> m_publicURLManager;
178 // The location of this member is important; to make sure contextDestroyed() notification on
179 // ExecutionContext's members (notably m_timeouts) is called before they are destructed,
180 // m_lifecycleNotifer should be placed *after* such members.
181 OwnPtr<ContextLifecycleNotifier> m_lifecycleNotifier;
184 } // namespace WebCore
186 #endif // ExecutionContext_h