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#include <wtf/text/WTFString.h> 28 29namespace WebCore { 30 31class CachedScript; 32class ContainerNode; 33class Element; 34class ScriptElement; 35class ScriptSourceCode; 36 37class ScriptElement : private CachedResourceClient { 38public: 39 virtual ~ScriptElement(); 40 41 Element& element() { return m_element; } 42 const Element& element() const { return m_element; } 43 44 enum LegacyTypeSupport { DisallowLegacyTypeInTypeAttribute, AllowLegacyTypeInTypeAttribute }; 45 bool prepareScript(const TextPosition& scriptStartPosition = TextPosition::minimumPosition(), LegacyTypeSupport = DisallowLegacyTypeInTypeAttribute); 46 47 String scriptCharset() const { return m_characterEncoding; } 48 String scriptContent() const; 49 void executeScript(const ScriptSourceCode&); 50 void execute(CachedScript*); 51 52 // XML parser calls these 53 virtual void dispatchLoadEvent() = 0; 54 void dispatchErrorEvent(); 55 bool isScriptTypeSupported(LegacyTypeSupport) const; 56 57 bool haveFiredLoadEvent() const { return m_haveFiredLoad; } 58 bool willBeParserExecuted() const { return m_willBeParserExecuted; } 59 bool readyToBeParserExecuted() const { return m_readyToBeParserExecuted; } 60 bool willExecuteWhenDocumentFinishedParsing() const { return m_willExecuteWhenDocumentFinishedParsing; } 61 CachedResourceHandle<CachedScript> cachedScript() { return m_cachedScript; } 62 63protected: 64 ScriptElement(Element&, bool createdByParser, bool isEvaluated); 65 66 void setHaveFiredLoadEvent(bool haveFiredLoad) { m_haveFiredLoad = haveFiredLoad; } 67 bool isParserInserted() const { return m_parserInserted; } 68 bool alreadyStarted() const { return m_alreadyStarted; } 69 bool forceAsync() const { return m_forceAsync; } 70 71 // Helper functions used by our parent classes. 72 void insertedInto(ContainerNode&); 73 void childrenChanged(); 74 void handleSourceAttribute(const String& sourceUrl); 75 void handleAsyncAttribute(); 76 77private: 78 bool ignoresLoadRequest() const; 79 bool isScriptForEventSupported() const; 80 81 bool requestScript(const String& sourceUrl); 82 void stopLoadRequest(); 83 84 virtual void notifyFinished(CachedResource*) override; 85 86 virtual String sourceAttributeValue() const = 0; 87 virtual String charsetAttributeValue() const = 0; 88 virtual String typeAttributeValue() const = 0; 89 virtual String languageAttributeValue() const = 0; 90 virtual String forAttributeValue() const = 0; 91 virtual String eventAttributeValue() const = 0; 92 virtual bool asyncAttributeValue() const = 0; 93 virtual bool deferAttributeValue() const = 0; 94 virtual bool hasSourceAttribute() const = 0; 95 96 Element& m_element; 97 CachedResourceHandle<CachedScript> m_cachedScript; 98 WTF::OrdinalNumber m_startLineNumber; 99 bool m_parserInserted : 1; 100 bool m_isExternalScript : 1; 101 bool m_alreadyStarted : 1; 102 bool m_haveFiredLoad : 1; 103 bool m_willBeParserExecuted : 1; // Same as "The parser will handle executing the script." 104 bool m_readyToBeParserExecuted : 1; 105 bool m_willExecuteWhenDocumentFinishedParsing : 1; 106 bool m_forceAsync : 1; 107 bool m_willExecuteInOrder : 1; 108 bool m_requestUsesAccessControl : 1; 109 String m_characterEncoding; 110 String m_fallbackCharacterEncoding; 111}; 112 113ScriptElement* toScriptElementIfPossible(Element*); 114 115} 116 117#endif 118