1/* 2 Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de) 3 Copyright (C) 2001 Dirk Mueller (mueller@kde.org) 4 Copyright (C) 2002 Waldo Bastian (bastian@kde.org) 5 Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) 6 Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. 7 8 This library is free software; you can redistribute it and/or 9 modify it under the terms of the GNU Library General Public 10 License as published by the Free Software Foundation; either 11 version 2 of the License, or (at your option) any later version. 12 13 This library is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 Library General Public License for more details. 17 18 You should have received a copy of the GNU Library General Public License 19 along with this library; see the file COPYING.LIB. If not, write to 20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 21 Boston, MA 02110-1301, USA. 22 23 This class provides all functionality needed for loading images, style sheets and html 24 pages from the web. It has a memory cache for these objects. 25*/ 26 27#include "config.h" 28#include "CachedScript.h" 29 30#include "MemoryCache.h" 31#include "CachedResourceClient.h" 32#include "CachedResourceClientWalker.h" 33#include "SharedBuffer.h" 34#include "TextResourceDecoder.h" 35#include <wtf/Vector.h> 36 37#if USE(JSC) 38#include <parser/SourceProvider.h> 39#endif 40 41namespace WebCore { 42 43CachedScript::CachedScript(const String& url, const String& charset) 44 : CachedResource(url, Script) 45 , m_decoder(TextResourceDecoder::create("application/javascript", charset)) 46 , m_decodedDataDeletionTimer(this, &CachedScript::decodedDataDeletionTimerFired) 47{ 48 // It's javascript we want. 49 // But some websites think their scripts are <some wrong mimetype here> 50 // and refuse to serve them if we only accept application/x-javascript. 51 setAccept("*/*"); 52} 53 54CachedScript::~CachedScript() 55{ 56} 57 58void CachedScript::didAddClient(CachedResourceClient* c) 59{ 60 if (m_decodedDataDeletionTimer.isActive()) 61 m_decodedDataDeletionTimer.stop(); 62 63 CachedResource::didAddClient(c); 64} 65 66void CachedScript::allClientsRemoved() 67{ 68 if (double interval = memoryCache()->deadDecodedDataDeletionInterval()) 69 m_decodedDataDeletionTimer.startOneShot(interval); 70} 71 72void CachedScript::setEncoding(const String& chs) 73{ 74 m_decoder->setEncoding(chs, TextResourceDecoder::EncodingFromHTTPHeader); 75} 76 77String CachedScript::encoding() const 78{ 79 return m_decoder->encoding().name(); 80} 81 82const String& CachedScript::script() 83{ 84 ASSERT(!isPurgeable()); 85 86 if (!m_script && m_data) { 87 m_script = m_decoder->decode(m_data->data(), encodedSize()); 88 m_script += m_decoder->flush(); 89 setDecodedSize(m_script.length() * sizeof(UChar)); 90 } 91 m_decodedDataDeletionTimer.startOneShot(0); 92 93 return m_script; 94} 95 96void CachedScript::data(PassRefPtr<SharedBuffer> data, bool allDataReceived) 97{ 98 if (!allDataReceived) 99 return; 100 101 m_data = data; 102 setEncodedSize(m_data.get() ? m_data->size() : 0); 103 setLoading(false); 104 checkNotify(); 105} 106 107void CachedScript::error(CachedResource::Status status) 108{ 109 setStatus(status); 110 ASSERT(errorOccurred()); 111 setLoading(false); 112 checkNotify(); 113} 114 115void CachedScript::destroyDecodedData() 116{ 117 m_script = String(); 118 unsigned extraSize = 0; 119#if USE(JSC) 120 if (m_sourceProviderCache && m_clients.isEmpty()) 121 m_sourceProviderCache->clear(); 122 123 extraSize = m_sourceProviderCache ? m_sourceProviderCache->byteSize() : 0; 124#endif 125 setDecodedSize(extraSize); 126 if (!MemoryCache::shouldMakeResourcePurgeableOnEviction() && isSafeToMakePurgeable()) 127 makePurgeable(true); 128} 129 130void CachedScript::decodedDataDeletionTimerFired(Timer<CachedScript>*) 131{ 132 destroyDecodedData(); 133} 134 135#if USE(JSC) 136JSC::SourceProviderCache* CachedScript::sourceProviderCache() const 137{ 138 if (!m_sourceProviderCache) 139 m_sourceProviderCache = adoptPtr(new JSC::SourceProviderCache); 140 return m_sourceProviderCache.get(); 141} 142 143void CachedScript::sourceProviderCacheSizeChanged(int delta) 144{ 145 setDecodedSize(decodedSize() + delta); 146} 147#endif 148 149} // namespace WebCore 150