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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/weborigin/KURL.h"
42 #include "wtf/Functional.h"
43 #include "wtf/OwnPtr.h"
44 #include "wtf/PassOwnPtr.h"
52 class ContextLifecycleNotifier;
57 class ExecutionContextTask;
59 class PublicURLManager;
61 class ScriptCallStack;
63 class ExecutionContext : public LifecycleContext<ExecutionContext>, public Supplementable<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() const { 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 disableEval(const String& errorMessage);
78 DOMWindow* executingWindow() const;
79 String userAgent(const KURL&) const;
80 void postTask(PassOwnPtr<ExecutionContextTask>);
81 void postTask(const Closure&);
82 double timerAlignmentInterval() const;
84 bool shouldSanitizeScriptError(const String& sourceURL, AccessControlStatus);
85 void reportException(PassRefPtrWillBeRawPtr<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();
98 unsigned activeDOMObjectCount();
100 virtual void suspendScheduledTasks();
101 virtual void resumeScheduledTasks();
102 virtual bool tasksNeedSuspension() { return false; }
104 bool activeDOMObjectsAreSuspended() const { return m_activeDOMObjectsAreSuspended; }
105 bool activeDOMObjectsAreStopped() const { return m_activeDOMObjectsAreStopped; }
106 bool isIteratingOverObservers() const;
108 // Called after the construction of an ActiveDOMObject to synchronize suspend state.
109 void suspendActiveDOMObjectIfNeeded(ActiveDOMObject*);
111 void ref() { refExecutionContext(); }
112 void deref() { derefExecutionContext(); }
114 // Gets the next id in a circular sequence from 1 to 2^31-1.
115 int circularSequentialID();
117 void didChangeTimerAlignmentInterval();
119 SandboxFlags sandboxFlags() const { return m_sandboxFlags; }
120 bool isSandboxed(SandboxFlags mask) const { return m_sandboxFlags & mask; }
121 void enforceSandboxFlags(SandboxFlags mask);
123 PassOwnPtr<LifecycleNotifier<ExecutionContext> > createLifecycleNotifier();
125 virtual EventQueue* eventQueue() const = 0;
129 ContextLifecycleNotifier& lifecycleNotifier();
132 friend class DOMTimer; // For installNewTimeout() and removeTimeoutByID() below.
134 bool dispatchErrorEvent(PassRefPtrWillBeRawPtr<ErrorEvent>, AccessControlStatus);
136 virtual void refExecutionContext() = 0;
137 virtual void derefExecutionContext() = 0;
138 // LifecycleContext implementation.
140 // Implementation details for DOMTimer. No other classes should call these functions.
141 int installNewTimeout(PassOwnPtr<ScheduledAction>, int timeout, bool singleShot);
142 void removeTimeoutByID(int timeoutID); // This makes underlying DOMTimer instance destructed.
144 ExecutionContextClient* m_client;
145 SandboxFlags m_sandboxFlags;
147 int m_circularSequentialID;
148 typedef HashMap<int, OwnPtr<DOMTimer> > TimeoutMap;
149 TimeoutMap m_timeouts;
151 bool m_inDispatchErrorEvent;
152 class PendingException;
153 OwnPtr<Vector<OwnPtr<PendingException> > > m_pendingExceptions;
155 bool m_activeDOMObjectsAreSuspended;
156 bool m_activeDOMObjectsAreStopped;
158 OwnPtr<PublicURLManager> m_publicURLManager;
160 // The location of this member is important; to make sure contextDestroyed() notification on
161 // ExecutionContext's members (notably m_timeouts) is called before they are destructed,
162 // m_lifecycleNotifer should be placed *after* such members.
163 OwnPtr<ContextLifecycleNotifier> m_lifecycleNotifier;
166 } // namespace WebCore
168 #endif // ExecutionContext_h