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author | Steve Block <steveblock@google.com> | 2011-05-06 11:45:16 +0100 |
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committer | Steve Block <steveblock@google.com> | 2011-05-12 13:44:10 +0100 |
commit | cad810f21b803229eb11403f9209855525a25d57 (patch) | |
tree | 29a6fd0279be608e0fe9ffe9841f722f0f4e4269 /Source/WebCore/dom/ScriptExecutionContext.h | |
parent | 121b0cf4517156d0ac5111caf9830c51b69bae8f (diff) | |
download | external_webkit-cad810f21b803229eb11403f9209855525a25d57.zip external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.gz external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.bz2 |
Merge WebKit at r75315: Initial merge by git.
Change-Id: I570314b346ce101c935ed22a626b48c2af266b84
Diffstat (limited to 'Source/WebCore/dom/ScriptExecutionContext.h')
-rw-r--r-- | Source/WebCore/dom/ScriptExecutionContext.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/Source/WebCore/dom/ScriptExecutionContext.h b/Source/WebCore/dom/ScriptExecutionContext.h new file mode 100644 index 0000000..12eb776 --- /dev/null +++ b/Source/WebCore/dom/ScriptExecutionContext.h @@ -0,0 +1,187 @@ +/* + * 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 "ActiveDOMObject.h" +#include "Console.h" +#include "KURL.h" +#include <wtf/Forward.h> +#include <wtf/HashMap.h> +#include <wtf/HashSet.h> +#include <wtf/PassOwnPtr.h> +#include <wtf/PassRefPtr.h> +#include <wtf/RefPtr.h> +#include <wtf/Threading.h> +#include <wtf/text/StringHash.h> + +#if USE(JSC) +#include <runtime/JSGlobalData.h> +#endif + +namespace WebCore { + + class Blob; +#if ENABLE(DATABASE) + class Database; + class DatabaseTaskSynchronizer; + class DatabaseThread; +#endif + class DOMTimer; +#if ENABLE(BLOB) || ENABLE(FILE_SYSTEM) + class FileThread; +#endif + class MessagePort; + class SecurityOrigin; +#if ENABLE(INSPECTOR) + class InspectorController; +#endif + + class ScriptExecutionContext { + public: + ScriptExecutionContext(); + virtual ~ScriptExecutionContext(); + + virtual bool isDocument() const { return false; } + virtual bool isWorkerContext() const { return false; } + +#if ENABLE(DATABASE) + virtual bool allowDatabaseAccess() const = 0; + virtual void databaseExceededQuota(const String& name) = 0; + DatabaseThread* databaseThread(); + void setHasOpenDatabases() { m_hasOpenDatabases = true; } + bool hasOpenDatabases() const { return m_hasOpenDatabases; } + // When the database cleanup is done, cleanupSync will be signalled. + void stopDatabases(DatabaseTaskSynchronizer*); +#endif + virtual bool isContextThread() const = 0; + virtual bool isJSExecutionTerminated() const = 0; + + const KURL& url() const { return virtualURL(); } + KURL completeURL(const String& url) const { return virtualCompleteURL(url); } + + virtual String userAgent(const KURL&) const = 0; + + SecurityOrigin* securityOrigin() const { return m_securityOrigin.get(); } +#if ENABLE(INSPECTOR) + virtual InspectorController* inspectorController() const { return 0; } +#endif + + virtual void reportException(const String& errorMessage, int lineNumber, const String& sourceURL) = 0; + virtual void addMessage(MessageSource, MessageType, MessageLevel, const String& message, unsigned 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(ActiveDOMObject::ReasonForSuspension); + 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 Noncopyable { + public: + virtual ~Task(); + virtual void performTask(ScriptExecutionContext*) = 0; + // Certain tasks get marked specially so that they aren't discarded, and are executed, when the context is shutting down its message queue. + virtual bool isCleanupTask() const { return false; } + }; + + virtual void postTask(PassOwnPtr<Task>) = 0; // Executes the task on context's thread asynchronously. + + void addTimeout(int timeoutId, DOMTimer*); + void removeTimeout(int timeoutId); + DOMTimer* findTimeout(int timeoutId); + +#if ENABLE(BLOB) + KURL createPublicBlobURL(Blob*); + void revokePublicBlobURL(const KURL&); +#endif + +#if USE(JSC) + JSC::JSGlobalData* globalData(); +#endif + +#if ENABLE(BLOB) || ENABLE(FILE_SYSTEM) + FileThread* fileThread(); + void stopFileThread(); +#endif + + 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; + + void closeMessagePorts(); + + RefPtr<SecurityOrigin> m_securityOrigin; + + HashSet<MessagePort*> m_messagePorts; + + HashMap<ActiveDOMObject*, void*> m_activeDOMObjects; + + HashMap<int, DOMTimer*> m_timeouts; + +#if ENABLE(BLOB) + HashSet<String> m_publicBlobURLs; +#endif + + virtual void refScriptExecutionContext() = 0; + virtual void derefScriptExecutionContext() = 0; + +#if ENABLE(DATABASE) + RefPtr<DatabaseThread> m_databaseThread; + bool m_hasOpenDatabases; // This never changes back to false, even after the database thread is closed. +#endif + +#if ENABLE(BLOB) || ENABLE(FILE_SYSTEM) + RefPtr<FileThread> m_fileThread; +#endif + }; + +} // namespace WebCore + + +#endif // ScriptExecutionContext_h |