18e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project/* 28e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de) 38e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Copyright (C) 2001 Dirk Mueller (mueller@kde.org) 48e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Copyright (C) 2002 Waldo Bastian (bastian@kde.org) 58e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) 68e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. 78e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 88e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project This library is free software; you can redistribute it and/or 98e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project modify it under the terms of the GNU Library General Public 108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project License as published by the Free Software Foundation; either 118e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project version 2 of the License, or (at your option) any later version. 128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project This library is distributed in the hope that it will be useful, 148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project but WITHOUT ANY WARRANTY; without even the implied warranty of 158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 168e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Library General Public License for more details. 178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project You should have received a copy of the GNU Library General Public License 198e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project along with this library; see the file COPYING.LIB. If not, write to 208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 218e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project Boston, MA 02110-1301, USA. 228e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 238e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project This class provides all functionality needed for loading images, style sheets and html 248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project pages from the web. It has a memory cache for these objects. 258e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project*/ 268e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "config.h" 288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "CachedCSSStyleSheet.h" 298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 3028040489d744e0c5d475a88663056c9040ed5320Teng-Hui Zhu#include "MemoryCache.h" 318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "CachedResourceClient.h" 328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "CachedResourceClientWalker.h" 335f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian#include "HTTPParsers.h" 348e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "TextResourceDecoder.h" 35dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block#include "SharedBuffer.h" 368e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include <wtf/Vector.h> 378e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 388e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectnamespace WebCore { 398e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 408e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source ProjectCachedCSSStyleSheet::CachedCSSStyleSheet(const String& url, const String& charset) 418e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project : CachedResource(url, CSSStyleSheet) 428e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project , m_decoder(TextResourceDecoder::create("text/css", charset)) 438e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 448e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // Prefer text/css but accept any type (dell.com serves a stylesheet 458e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project // as text/html; see <http://bugs.webkit.org/show_bug.cgi?id=11451>). 468e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project setAccept("text/css,*/*;q=0.1"); 478e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 488e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 498e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source ProjectCachedCSSStyleSheet::~CachedCSSStyleSheet() 508e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 518e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 528e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 530bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdochvoid CachedCSSStyleSheet::didAddClient(CachedResourceClient *c) 548e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 555d6f8ef31d11ee66598999b1b749ba9ff767e4d5Leon Clarke if (!isLoading()) 56d0825bca7fe65beaee391d30da42e937db621564Steve Block c->setCSSStyleSheet(m_url, m_response.url(), m_decoder->encoding().name(), this); 578e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 58d0825bca7fe65beaee391d30da42e937db621564Steve Block 59635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Projectvoid CachedCSSStyleSheet::allClientsRemoved() 60635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project{ 6128040489d744e0c5d475a88663056c9040ed5320Teng-Hui Zhu if (!MemoryCache::shouldMakeResourcePurgeableOnEviction() && isSafeToMakePurgeable()) 62635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project makePurgeable(true); 63635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project} 648e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 658e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectvoid CachedCSSStyleSheet::setEncoding(const String& chs) 668e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 678e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_decoder->setEncoding(chs, TextResourceDecoder::EncodingFromHTTPHeader); 688e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 698e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 708e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source ProjectString CachedCSSStyleSheet::encoding() const 718e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 728e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return m_decoder->encoding().name(); 738e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 74635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project 75d0825bca7fe65beaee391d30da42e937db621564Steve Blockconst String CachedCSSStyleSheet::sheetText(bool enforceMIMEType, bool* hasValidMIMEType) const 76635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project{ 77635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project ASSERT(!isPurgeable()); 78635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project 79d0825bca7fe65beaee391d30da42e937db621564Steve Block if (!m_data || m_data->isEmpty() || !canUseSheet(enforceMIMEType, hasValidMIMEType)) 80635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project return String(); 81635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project 82635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project if (!m_decodedSheetText.isNull()) 83635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project return m_decodedSheetText; 84635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project 85635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project // Don't cache the decoded text, regenerating is cheap and it can use quite a bit of memory 86635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project String sheetText = m_decoder->decode(m_data->data(), m_data->size()); 87635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project sheetText += m_decoder->flush(); 88635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project return sheetText; 89635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project} 908e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 918e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectvoid CachedCSSStyleSheet::data(PassRefPtr<SharedBuffer> data, bool allDataReceived) 928e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 938e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (!allDataReceived) 948e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return; 958e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 968e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project m_data = data; 978e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project setEncodedSize(m_data.get() ? m_data->size() : 0); 98635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project // Decode the data to find out the encoding and keep the sheet text around during checkNotify() 99635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project if (m_data) { 100635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project m_decodedSheetText = m_decoder->decode(m_data->data(), m_data->size()); 101635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project m_decodedSheetText += m_decoder->flush(); 1028e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project } 1036c2af9490927c3c5959b5cb07461b646f8b32f6cKristian Monsen setLoading(false); 1048e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project checkNotify(); 105635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project // Clear the decoded text as it is unlikely to be needed immediately again and is cheap to regenerate. 106635860845790a19bf50bbc51ba8fb66a96dde068The Android Open Source Project m_decodedSheetText = String(); 1078e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 1088e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1098e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Projectvoid CachedCSSStyleSheet::checkNotify() 1108e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 1116c2af9490927c3c5959b5cb07461b646f8b32f6cKristian Monsen if (isLoading()) 1128e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return; 1138e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1148e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project CachedResourceClientWalker w(m_clients); 1158e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project while (CachedResourceClient *c = w.next()) 116d0825bca7fe65beaee391d30da42e937db621564Steve Block c->setCSSStyleSheet(m_url, m_response.url(), m_decoder->encoding().name(), this); 1178e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 1188e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1196b70adc33054f8aee8c54d0f460458a9df11b8a5Russell Brennervoid CachedCSSStyleSheet::error(CachedResource::Status status) 1208e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 1216b70adc33054f8aee8c54d0f460458a9df11b8a5Russell Brenner setStatus(status); 1226b70adc33054f8aee8c54d0f460458a9df11b8a5Russell Brenner ASSERT(errorOccurred()); 1236c2af9490927c3c5959b5cb07461b646f8b32f6cKristian Monsen setLoading(false); 1248e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project checkNotify(); 1258e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 1268e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 127d0825bca7fe65beaee391d30da42e937db621564Steve Blockbool CachedCSSStyleSheet::canUseSheet(bool enforceMIMEType, bool* hasValidMIMEType) const 1288e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 1298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project if (errorOccurred()) 1308e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return false; 1318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 132d0825bca7fe65beaee391d30da42e937db621564Steve Block if (!enforceMIMEType && !hasValidMIMEType) 1338e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project return true; 1348e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1355f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian // This check exactly matches Firefox. Note that we grab the Content-Type 1365f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian // header directly because we want to see what the value is BEFORE content 1375f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian // sniffing. Firefox does this by setting a "type hint" on the channel. 1385f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian // This implementation should be observationally equivalent. 1395f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian // 1405f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian // This code defaults to allowing the stylesheet for non-HTTP protocols so 1415f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian // folks can use standards mode for local HTML documents. 1425f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian String mimeType = extractMIMETypeFromMediaType(response().httpHeaderField("Content-Type")); 143d0825bca7fe65beaee391d30da42e937db621564Steve Block bool typeOK = mimeType.isEmpty() || equalIgnoringCase(mimeType, "text/css") || equalIgnoringCase(mimeType, "application/x-unknown-content-type"); 144d0825bca7fe65beaee391d30da42e937db621564Steve Block if (hasValidMIMEType) 145d0825bca7fe65beaee391d30da42e937db621564Steve Block *hasValidMIMEType = typeOK; 146d0825bca7fe65beaee391d30da42e937db621564Steve Block if (!enforceMIMEType) 147d0825bca7fe65beaee391d30da42e937db621564Steve Block return true; 148d0825bca7fe65beaee391d30da42e937db621564Steve Block return typeOK; 1498e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 1508e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1518e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 152