1 /* 2 * Copyright (C) 2008 Nikolas Zimmermann <zimmermann@kde.org> 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 * 19 */ 20 21 #ifndef ScriptElement_h 22 #define ScriptElement_h 23 24 #include "CachedResourceClient.h" 25 #include "CachedResourceHandle.h" 26 #include <wtf/text/TextPosition.h> 27 28 namespace WebCore { 29 30 class CachedScript; 31 class Element; 32 class ScriptElement; 33 class ScriptSourceCode; 34 35 class ScriptElement : private CachedResourceClient { 36 WTF_MAKE_FAST_ALLOCATED; 37 public: 38 ScriptElement(Element*, bool createdByParser, bool isEvaluated); 39 virtual ~ScriptElement(); 40 element()41 Element* element() const { return m_element; } 42 43 enum LegacyTypeSupport { DisallowLegacyTypeInTypeAttribute, AllowLegacyTypeInTypeAttribute }; 44 bool prepareScript(const TextPosition1& scriptStartPosition = TextPosition1::minimumPosition(), LegacyTypeSupport = DisallowLegacyTypeInTypeAttribute); 45 scriptCharset()46 String scriptCharset() const { return m_characterEncoding; } 47 String scriptContent() const; 48 void executeScript(const ScriptSourceCode&); 49 void execute(CachedScript*); 50 51 // XML parser calls these 52 virtual void dispatchLoadEvent() = 0; 53 virtual void dispatchErrorEvent() = 0; 54 bool isScriptTypeSupported(LegacyTypeSupport) const; 55 haveFiredLoadEvent()56 bool haveFiredLoadEvent() const { return m_haveFiredLoad; } willBeParserExecuted()57 bool willBeParserExecuted() const { return m_willBeParserExecuted; } readyToBeParserExecuted()58 bool readyToBeParserExecuted() const { return m_readyToBeParserExecuted; } willExecuteWhenDocumentFinishedParsing()59 bool willExecuteWhenDocumentFinishedParsing() const { return m_willExecuteWhenDocumentFinishedParsing; } cachedScript()60 CachedResourceHandle<CachedScript> cachedScript() { return m_cachedScript; } 61 62 protected: setHaveFiredLoadEvent(bool haveFiredLoad)63 void setHaveFiredLoadEvent(bool haveFiredLoad) { m_haveFiredLoad = haveFiredLoad; } isParserInserted()64 bool isParserInserted() const { return m_parserInserted; } alreadyStarted()65 bool alreadyStarted() const { return m_alreadyStarted; } forceAsync()66 bool forceAsync() const { return m_forceAsync; } 67 68 // Helper functions used by our parent classes. 69 void insertedIntoDocument(); 70 void removedFromDocument(); 71 void childrenChanged(); 72 void handleSourceAttribute(const String& sourceUrl); 73 void handleAsyncAttribute(); 74 75 private: 76 bool ignoresLoadRequest() const; 77 bool isScriptForEventSupported() const; 78 79 bool requestScript(const String& sourceUrl); 80 void stopLoadRequest(); 81 82 virtual void notifyFinished(CachedResource*); 83 84 virtual String sourceAttributeValue() const = 0; 85 virtual String charsetAttributeValue() const = 0; 86 virtual String typeAttributeValue() const = 0; 87 virtual String languageAttributeValue() const = 0; 88 virtual String forAttributeValue() const = 0; 89 virtual String eventAttributeValue() const = 0; 90 virtual bool asyncAttributeValue() const = 0; 91 virtual bool deferAttributeValue() const = 0; 92 virtual bool hasSourceAttribute() const = 0; 93 94 Element* m_element; 95 CachedResourceHandle<CachedScript> m_cachedScript; 96 bool m_parserInserted : 1; 97 bool m_isExternalScript : 1; 98 bool m_alreadyStarted : 1; 99 bool m_haveFiredLoad : 1; 100 bool m_willBeParserExecuted : 1; // Same as "The parser will handle executing the script." 101 bool m_readyToBeParserExecuted : 1; 102 bool m_willExecuteWhenDocumentFinishedParsing : 1; 103 bool m_forceAsync : 1; 104 bool m_willExecuteInOrder : 1; 105 String m_characterEncoding; 106 String m_fallbackCharacterEncoding; 107 }; 108 109 ScriptElement* toScriptElement(Element*); 110 111 } 112 113 #endif 114