| /* |
| * Copyright (C) 2008 Apple Inc. All Rights Reserved. |
| * Copyright (C) 2010 Google Inc. All Rights Reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef HTMLPreloadScanner_h |
| #define HTMLPreloadScanner_h |
| |
| #include "core/CoreExport.h" |
| #include "core/css/MediaValuesCached.h" |
| #include "core/dom/ViewportDescription.h" |
| #include "core/html/parser/CSSPreloadScanner.h" |
| #include "core/html/parser/CompactHTMLToken.h" |
| #include "core/html/parser/HTMLToken.h" |
| #include "platform/text/SegmentedString.h" |
| #include "wtf/PtrUtil.h" |
| #include "wtf/Vector.h" |
| #include <memory> |
| |
| namespace blink { |
| |
| typedef size_t TokenPreloadScannerCheckpoint; |
| |
| class HTMLParserOptions; |
| class HTMLTokenizer; |
| class SegmentedString; |
| |
| struct ViewportDescriptionWrapper { |
| ViewportDescription description; |
| bool set; |
| ViewportDescriptionWrapper() |
| : set(false) |
| { |
| } |
| }; |
| |
| struct CORE_EXPORT CachedDocumentParameters { |
| USING_FAST_MALLOC(CachedDocumentParameters); |
| public: |
| static std::unique_ptr<CachedDocumentParameters> create(Document* document) |
| { |
| return wrapUnique(new CachedDocumentParameters(document)); |
| } |
| |
| bool doHtmlPreloadScanning; |
| bool doDocumentWritePreloadScanning; |
| Length defaultViewportMinWidth; |
| bool viewportMetaZeroValuesQuirk; |
| bool viewportMetaEnabled; |
| ReferrerPolicy referrerPolicy; |
| |
| private: |
| explicit CachedDocumentParameters(Document*); |
| }; |
| |
| class TokenPreloadScanner { |
| WTF_MAKE_NONCOPYABLE(TokenPreloadScanner); USING_FAST_MALLOC(TokenPreloadScanner); |
| public: |
| TokenPreloadScanner(const KURL& documentURL, std::unique_ptr<CachedDocumentParameters>, const MediaValuesCached::MediaValuesCachedData&); |
| ~TokenPreloadScanner(); |
| |
| void scan(const HTMLToken&, const SegmentedString&, PreloadRequestStream& requests, ViewportDescriptionWrapper*); |
| void scan(const CompactHTMLToken&, const SegmentedString&, PreloadRequestStream& requests, ViewportDescriptionWrapper*, bool* likelyDocumentWriteScript); |
| |
| void setPredictedBaseElementURL(const KURL& url) { m_predictedBaseElementURL = url; } |
| |
| // A TokenPreloadScannerCheckpoint is valid until the next call to rewindTo, |
| // at which point all outstanding checkpoints are invalidated. |
| TokenPreloadScannerCheckpoint createCheckpoint(); |
| void rewindTo(TokenPreloadScannerCheckpoint); |
| |
| private: |
| class StartTagScanner; |
| |
| bool shouldEvaluateForDocumentWrite(const String& source); |
| bool shouldEvaluateForDocumentWrite(const HTMLToken::DataVector& source) { return false; } |
| |
| template <typename Token> |
| inline void scanCommon(const Token&, const SegmentedString&, PreloadRequestStream& requests, ViewportDescriptionWrapper*, bool* likelyDocumentWriteScript); |
| |
| template<typename Token> |
| void updatePredictedBaseURL(const Token&); |
| |
| struct Checkpoint { |
| Checkpoint(const KURL& predictedBaseElementURL, bool inStyle, bool inScript, bool isAppCacheEnabled, bool isCSPEnabled, size_t templateCount) |
| : predictedBaseElementURL(predictedBaseElementURL) |
| , inStyle(inStyle) |
| , inScript(inScript) |
| , isAppCacheEnabled(isAppCacheEnabled) |
| , isCSPEnabled(isCSPEnabled) |
| , templateCount(templateCount) |
| { |
| } |
| |
| KURL predictedBaseElementURL; |
| bool inStyle; |
| bool inScript; |
| bool isAppCacheEnabled; |
| bool isCSPEnabled; |
| size_t templateCount; |
| }; |
| |
| struct PictureData { |
| PictureData() |
| : sourceSize(0.0) |
| , sourceSizeSet(false) |
| , picked(false) |
| { |
| } |
| String sourceURL; |
| float sourceSize; |
| bool sourceSizeSet; |
| bool picked; |
| }; |
| |
| CSSPreloadScanner m_cssScanner; |
| const KURL m_documentURL; |
| KURL m_predictedBaseElementURL; |
| bool m_inStyle; |
| bool m_inPicture; |
| bool m_inScript; |
| bool m_isAppCacheEnabled; |
| bool m_isCSPEnabled; |
| PictureData m_pictureData; |
| size_t m_templateCount; |
| std::unique_ptr<CachedDocumentParameters> m_documentParameters; |
| Persistent<MediaValuesCached> m_mediaValues; |
| ClientHintsPreferences m_clientHintsPreferences; |
| |
| bool m_didRewind = false; |
| |
| Vector<Checkpoint> m_checkpoints; |
| }; |
| |
| class CORE_EXPORT HTMLPreloadScanner { |
| WTF_MAKE_NONCOPYABLE(HTMLPreloadScanner); USING_FAST_MALLOC(HTMLPreloadScanner); |
| public: |
| static std::unique_ptr<HTMLPreloadScanner> create(const HTMLParserOptions& options, const KURL& documentURL, std::unique_ptr<CachedDocumentParameters> documentParameters, const MediaValuesCached::MediaValuesCachedData& mediaValuesCachedData) |
| { |
| return wrapUnique(new HTMLPreloadScanner(options, documentURL, std::move(documentParameters), mediaValuesCachedData)); |
| } |
| |
| |
| ~HTMLPreloadScanner(); |
| |
| void appendToEnd(const SegmentedString&); |
| void scanAndPreload(ResourcePreloader*, const KURL& documentBaseElementURL, ViewportDescriptionWrapper*); |
| |
| private: |
| HTMLPreloadScanner(const HTMLParserOptions&, const KURL& documentURL, std::unique_ptr<CachedDocumentParameters>, const MediaValuesCached::MediaValuesCachedData&); |
| |
| TokenPreloadScanner m_scanner; |
| SegmentedString m_source; |
| HTMLToken m_token; |
| std::unique_ptr<HTMLTokenizer> m_tokenizer; |
| }; |
| |
| } // namespace blink |
| |
| #endif |