1 /* 2 * Copyright (C) 2013 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef HTMLImportLoader_h 32 #define HTMLImportLoader_h 33 34 #include "core/dom/DocumentParserClient.h" 35 #include "core/fetch/RawResource.h" 36 #include "core/fetch/ResourceOwner.h" 37 #include "platform/heap/Handle.h" 38 #include "wtf/OwnPtr.h" 39 #include "wtf/PassOwnPtr.h" 40 #include "wtf/Vector.h" 41 42 namespace blink { 43 44 class CustomElementSyncMicrotaskQueue; 45 class Document; 46 class DocumentWriter; 47 class HTMLImportChild; 48 class HTMLImportsController; 49 50 51 // 52 // Owning imported Document lifetime. It also implements ResourceClient through ResourceOwner 53 // to feed fetched bytes to the DocumentWriter of the imported document. 54 // HTMLImportLoader is owned by HTMLImportsController. 55 // 56 // 57 class HTMLImportLoader FINAL : public NoBaseWillBeGarbageCollectedFinalized<HTMLImportLoader>, public ResourceOwner<RawResource>, public DocumentParserClient { 58 public: 59 enum State { 60 StateLoading, 61 StateWritten, 62 StateParsed, 63 StateLoaded, 64 StateError 65 }; 66 create(HTMLImportsController * controller)67 static PassOwnPtrWillBeRawPtr<HTMLImportLoader> create(HTMLImportsController* controller) 68 { 69 return adoptPtrWillBeNoop(new HTMLImportLoader(controller)); 70 } 71 72 virtual ~HTMLImportLoader(); 73 document()74 Document* document() const { return m_document.get(); } 75 void addImport(HTMLImportChild*); 76 #if !ENABLE(OILPAN) 77 void removeImport(HTMLImportChild*); 78 #endif 79 void moveToFirst(HTMLImportChild*); firstImport()80 HTMLImportChild* firstImport() const { return m_imports[0]; } isFirstImport(const HTMLImportChild * child)81 bool isFirstImport(const HTMLImportChild* child) const { return m_imports.size() ? firstImport() == child : false; } 82 isDone()83 bool isDone() const { return m_state == StateLoaded || m_state == StateError; } hasError()84 bool hasError() const { return m_state == StateError; } 85 bool shouldBlockScriptExecution() const; 86 87 #if !ENABLE(OILPAN) 88 void importDestroyed(); 89 #endif 90 void startLoading(const ResourcePtr<RawResource>&); 91 92 // Tells the loader that all of the import's stylesheets finished 93 // loading. 94 // Called by Document::didRemoveAllPendingStylesheet. 95 void didRemoveAllPendingStylesheet(); 96 97 PassRefPtrWillBeRawPtr<CustomElementSyncMicrotaskQueue> microtaskQueue() const; 98 99 virtual void trace(Visitor*); 100 101 private: 102 HTMLImportLoader(HTMLImportsController*); 103 104 // RawResourceClient 105 virtual void responseReceived(Resource*, const ResourceResponse&) OVERRIDE; 106 virtual void dataReceived(Resource*, const char* data, int length) OVERRIDE; 107 virtual void notifyFinished(Resource*) OVERRIDE; 108 109 // DocumentParserClient 110 111 // Called after document parse is complete after DOMContentLoaded was dispatched. 112 virtual void notifyParserStopped(); 113 114 State startWritingAndParsing(const ResourceResponse&); 115 State finishWriting(); 116 State finishParsing(); 117 State finishLoading(); 118 119 void setState(State); 120 void didFinishLoading(); 121 bool hasPendingResources() const; 122 #if !ENABLE(OILPAN) 123 void clear(); 124 #endif 125 126 RawPtrWillBeMember<HTMLImportsController> m_controller; 127 WillBeHeapVector<RawPtrWillBeMember<HTMLImportChild> > m_imports; 128 State m_state; 129 RefPtrWillBeMember<Document> m_document; 130 RefPtrWillBeMember<DocumentWriter> m_writer; 131 RefPtrWillBeMember<CustomElementSyncMicrotaskQueue> m_microtaskQueue; 132 }; 133 134 } // namespace blink 135 136 #endif // HTMLImportLoader_h 137