auto import from //depot/cupcake/@135843

1 files changed, 420 insertions, 0 deletions

diff --git a/WebCore/html/HTMLTokenizer.h b/WebCore/html/HTMLTokenizer.h
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+/*
+    Copyright (C) 1997 Martin Jones (mjones@kde.org)
+              (C) 1997 Torben Weis (weis@kde.org)
+              (C) 1998 Waldo Bastian (bastian@kde.org)
+              (C) 2001 Dirk Mueller (mueller@kde.org)
+    Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#ifndef HTMLTokenizer_h
+#define HTMLTokenizer_h
+
+#include "CachedResourceClient.h"
+#include "CachedResourceHandle.h"
+#include "NamedMappedAttrMap.h"
+#include "SegmentedString.h"
+#include "Timer.h"
+#include "Tokenizer.h"
+#include <wtf/Deque.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+class CachedScript;
+class DocumentFragment;
+class Document;
+class HTMLDocument;
+class HTMLViewSourceDocument;
+class FrameView;
+class HTMLParser;
+class Node;
+class PreloadScanner;
+
+/**
+ * @internal
+ * represents one HTML tag. Consists of a numerical id, and the list
+ * of attributes. Can also represent text. In this case the id = 0 and
+ * text contains the text.
+ */
+class Token {
+public:
+    Token() : beginTag(true), flat(false), brokenXMLStyle(false), m_sourceInfo(0) { }
+    ~Token() { }
+
+    void addAttribute(Document*, AtomicString& attrName, const AtomicString& v, bool viewSourceMode);
+
+    bool isOpenTag(const QualifiedName& fullName) const { return beginTag && fullName.localName() == tagName; }
+    bool isCloseTag(const QualifiedName& fullName) const { return !beginTag && fullName.localName() == tagName; }
+
+    void reset()
+    {
+        attrs = 0;
+        text = 0;
+        tagName = nullAtom;
+        beginTag = true;
+        flat = false;
+        brokenXMLStyle = false;
+        if (m_sourceInfo)
+            m_sourceInfo->clear();
+    }
+
+    void addViewSourceChar(UChar c) { if (!m_sourceInfo.get()) m_sourceInfo.set(new Vector<UChar>); m_sourceInfo->append(c); }
+
+    RefPtr<NamedMappedAttrMap> attrs;
+    RefPtr<StringImpl> text;
+    AtomicString tagName;
+    bool beginTag;
+    bool flat;
+    bool brokenXMLStyle;
+    OwnPtr<Vector<UChar> > m_sourceInfo;
+};
+
+enum DoctypeState {
+    DoctypeBegin,
+    DoctypeBeforeName,
+    DoctypeName,
+    DoctypeAfterName,
+    DoctypeBeforePublicID,
+    DoctypePublicID,
+    DoctypeAfterPublicID,
+    DoctypeBeforeSystemID,
+    DoctypeSystemID,
+    DoctypeAfterSystemID,
+    DoctypeBogus
+};
+
+class DoctypeToken {
+public:
+    DoctypeToken() {}
+    
+    void reset()
+    {
+        m_name.clear();
+        m_publicID.clear();
+        m_systemID.clear();
+        m_state = DoctypeBegin;
+        m_source.clear();
+    }
+
+    DoctypeState state() { return m_state; }
+    void setState(DoctypeState s) { m_state = s; }
+
+    Vector<UChar> m_name;
+    Vector<UChar> m_publicID;
+    Vector<UChar> m_systemID;
+    DoctypeState m_state;
+    
+    Vector<UChar> m_source;
+};
+
+//-----------------------------------------------------------------------------
+
+class HTMLTokenizer : public Tokenizer, public CachedResourceClient {
+public:
+    HTMLTokenizer(HTMLDocument*, bool reportErrors);
+    HTMLTokenizer(HTMLViewSourceDocument*);
+    HTMLTokenizer(DocumentFragment*);
+    virtual ~HTMLTokenizer();
+
+    virtual bool write(const SegmentedString&, bool appendData);
+    virtual void finish();
+    virtual void setForceSynchronous(bool force);
+    virtual bool isWaitingForScripts() const;
+    virtual void stopParsing();
+    virtual bool processingData() const;
+    virtual int executingScript() const { return m_executingScript; }
+
+    virtual int lineNumber() const { return m_lineNumber; }
+    virtual int columnNumber() const { return 1; }
+
+    bool processingContentWrittenByScript() const { return src.excludeLineNumbers(); }
+    
+    virtual void executeScriptsWaitingForStylesheets();
+    
+    virtual bool isHTMLTokenizer() const { return true; }
+    HTMLParser* htmlParser() const { return parser; }
+
+private:
+    class State;
+
+    // Where we are in parsing a tag
+    void begin();
+    void end();
+
+    void reset();
+
+    PassRefPtr<Node> processToken();
+    void processDoctypeToken();
+
+    State processListing(SegmentedString, State);
+    State parseComment(SegmentedString&, State);
+    State parseDoctype(SegmentedString&, State);
+    State parseServer(SegmentedString&, State);
+    State parseText(SegmentedString&, State);
+    State parseSpecial(SegmentedString&, State);
+    State parseTag(SegmentedString&, State);
+    State parseEntity(SegmentedString&, UChar*& dest, State, unsigned& _cBufferPos, bool start, bool parsingTag);
+    State parseProcessingInstruction(SegmentedString&, State);
+    State scriptHandler(State);
+    State scriptExecution(const String& script, State, const String& scriptURL, int baseLine = 1);
+    void setSrc(const SegmentedString&);
+ 
+    // check if we have enough space in the buffer.
+    // if not enlarge it
+    inline void checkBuffer(int len = 10)
+    {
+        if ((dest - buffer) > size - len)
+            enlargeBuffer(len);
+    }
+
+    inline void checkScriptBuffer(int len = 10)
+    {
+        if (scriptCodeSize + len >= scriptCodeMaxSize)
+            enlargeScriptBuffer(len);
+    }
+
+    void enlargeBuffer(int len);
+    void enlargeScriptBuffer(int len);
+
+    bool continueProcessing(int& processedCount, double startTime, State&);
+    void timerFired(Timer<HTMLTokenizer>*);
+    void allDataProcessed();
+
+    // from CachedResourceClient
+    void notifyFinished(CachedResource *finishedObj);
+
+    // Internal buffers
+    ///////////////////
+    UChar* buffer;
+    UChar* dest;
+
+    Token currToken;
+
+    // the size of buffer
+    int size;
+
+    // Tokenizer flags
+    //////////////////
+    // are we in quotes within a html tag
+    enum { NoQuote, SingleQuote, DoubleQuote } tquote;
+
+    // Are we in a &... character entity description?
+    enum EntityState {
+        NoEntity = 0,
+        SearchEntity = 1,
+        NumericSearch = 2,
+        Hexadecimal = 3,
+        Decimal = 4,
+        EntityName = 5,
+        SearchSemicolon = 6
+    };
+    unsigned EntityUnicodeValue;
+
+    enum TagState {
+        NoTag = 0,
+        TagName = 1,
+        SearchAttribute = 2,
+        AttributeName = 3,
+        SearchEqual = 4,
+        SearchValue = 5,
+        QuotedValue = 6,
+        Value = 7,
+        SearchEnd = 8
+    };
+
+    class State {
+    public:
+        State() : m_bits(0) { }
+
+        TagState tagState() const { return static_cast<TagState>(m_bits & TagMask); }
+        void setTagState(TagState t) { m_bits = (m_bits & ~TagMask) | t; }
+        EntityState entityState() const { return static_cast<EntityState>((m_bits & EntityMask) >> EntityShift); }
+        void setEntityState(EntityState e) { m_bits = (m_bits & ~EntityMask) | (e << EntityShift); }
+
+        bool inScript() const { return testBit(InScript); }
+        void setInScript(bool v) { setBit(InScript, v); }
+        bool inStyle() const { return testBit(InStyle); }
+        void setInStyle(bool v) { setBit(InStyle, v); }
+        bool inXmp() const { return testBit(InXmp); }
+        void setInXmp(bool v) { setBit(InXmp, v); }
+        bool inTitle() const { return testBit(InTitle); }
+        void setInTitle(bool v) { setBit(InTitle, v); }
+        bool inIFrame() const { return testBit(InIFrame); }
+        void setInIFrame(bool v) { setBit(InIFrame, v); }
+        bool inPlainText() const { return testBit(InPlainText); }
+        void setInPlainText(bool v) { setBit(InPlainText, v); }
+        bool inProcessingInstruction() const { return testBit(InProcessingInstruction); }
+        void setInProcessingInstruction(bool v) { return setBit(InProcessingInstruction, v); }
+        bool inComment() const { return testBit(InComment); }
+        void setInComment(bool v) { setBit(InComment, v); }
+        bool inDoctype() const { return testBit(InDoctype); }
+        void setInDoctype(bool v) { setBit(InDoctype, v); }
+        bool inTextArea() const { return testBit(InTextArea); }
+        void setInTextArea(bool v) { setBit(InTextArea, v); }
+        bool escaped() const { return testBit(Escaped); }
+        void setEscaped(bool v) { setBit(Escaped, v); }
+        bool inServer() const { return testBit(InServer); }
+        void setInServer(bool v) { setBit(InServer, v); }
+        bool skipLF() const { return testBit(SkipLF); }
+        void setSkipLF(bool v) { setBit(SkipLF, v); }
+        bool startTag() const { return testBit(StartTag); }
+        void setStartTag(bool v) { setBit(StartTag, v); }
+        bool discardLF() const { return testBit(DiscardLF); }
+        void setDiscardLF(bool v) { setBit(DiscardLF, v); }
+        bool allowYield() const { return testBit(AllowYield); }
+        void setAllowYield(bool v) { setBit(AllowYield, v); }
+        bool loadingExtScript() const { return testBit(LoadingExtScript); }
+        void setLoadingExtScript(bool v) { setBit(LoadingExtScript, v); }
+        bool forceSynchronous() const { return testBit(ForceSynchronous); }
+        void setForceSynchronous(bool v) { setBit(ForceSynchronous, v); }
+
+        bool inAnySpecial() const { return m_bits & (InScript | InStyle | InXmp | InTextArea | InTitle | InIFrame); }
+        bool hasTagState() const { return m_bits & TagMask; }
+        bool hasEntityState() const { return m_bits & EntityMask; }
+
+        bool needsSpecialWriteHandling() const { return m_bits & (InScript | InStyle | InXmp | InTextArea | InTitle | InIFrame | TagMask | EntityMask | InPlainText | InComment | InDoctype | InServer | InProcessingInstruction | StartTag); }
+
+    private:
+        static const int EntityShift = 4;
+        enum StateBits {
+            TagMask = (1 << 4) - 1,
+            EntityMask = (1 << 7) - (1 << 4),
+            InScript = 1 << 7,
+            InStyle = 1 << 8,
+            // Bit 9 unused
+            InXmp = 1 << 10,
+            InTitle = 1 << 11,
+            InPlainText = 1 << 12,
+            InProcessingInstruction = 1 << 13,
+            InComment = 1 << 14,
+            InTextArea = 1 << 15,
+            Escaped = 1 << 16,
+            InServer = 1 << 17,
+            SkipLF = 1 << 18,
+            StartTag = 1 << 19,
+            DiscardLF = 1 << 20, // FIXME: should clarify difference between skip and discard
+            AllowYield = 1 << 21,
+            LoadingExtScript = 1 << 22,
+            ForceSynchronous = 1 << 23,
+            InIFrame = 1 << 24,
+            InDoctype = 1 << 25
+        };
+
+        void setBit(StateBits bit, bool value)
+        {
+            if (value)
+                m_bits |= bit;
+            else
+                m_bits &= ~bit;
+        }
+        bool testBit(StateBits bit) const { return m_bits & bit; }
+
+        unsigned m_bits;
+    };
+
+    State m_state;
+    
+    DoctypeToken m_doctypeToken;
+    int m_doctypeSearchCount;
+    int m_doctypeSecondarySearchCount;
+
+    bool brokenServer;
+
+    // Name of an attribute that we just scanned.
+    AtomicString attrName;
+
+    // Used to store the code of a scripting sequence
+    UChar* scriptCode;
+    // Size of the script sequenze stored in @ref #scriptCode
+    int scriptCodeSize;
+    // Maximal size that can be stored in @ref #scriptCode
+    int scriptCodeMaxSize;
+    // resync point of script code size
+    int scriptCodeResync;
+
+    // Stores characters if we are scanning for a string like "</script>"
+    UChar searchBuffer[10];
+    
+    // Counts where we are in the string we are scanning for
+    int searchCount;
+    // the stopper string
+    const char* searchStopper;
+    // the stopper len
+    int searchStopperLen;
+    
+    // if no more data is coming, just parse what we have (including ext scripts that
+    // may be still downloading) and finish
+    bool noMoreData;
+    // URL to get source code of script from
+    String scriptSrc;
+    String scriptSrcCharset;
+    // the HTML code we will parse after the external script we are waiting for has loaded
+    SegmentedString pendingSrc;
+
+    // the HTML code we will parse after this particular script has
+    // loaded, but before all pending HTML
+    SegmentedString *currentPrependingSrc;
+
+    // true if we are executing a script while parsing a document. This causes the parsing of
+    // the output of the script to be postponed until after the script has finished executing
+    int m_executingScript;
+    Deque<CachedResourceHandle<CachedScript> > pendingScripts;
+    RefPtr<Node> scriptNode;
+
+    bool m_requestingScript;
+    bool m_hasScriptsWaitingForStylesheets;
+
+    // if we found one broken comment, there are most likely others as well
+    // store a flag to get rid of the O(n^2) behaviour in such a case.
+    bool brokenComments;
+    // current line number
+    int m_lineNumber;
+    // line number at which the current <script> started
+    int scriptStartLineno;
+    int tagStartLineno;
+
+    double m_tokenizerTimeDelay;
+    int m_tokenizerChunkSize;
+
+    // The timer for continued processing.
+    Timer<HTMLTokenizer> m_timer;
+
+// This buffer can hold arbitrarily long user-defined attribute names, such as in EMBED tags.
+// So any fixed number might be too small, but rather than rewriting all usage of this buffer
+// we'll just make it large enough to handle all imaginable cases.
+#define CBUFLEN 1024
+    UChar cBuffer[CBUFLEN + 2];
+    unsigned int m_cBufferPos;
+
+    SegmentedString src;
+    Document* m_doc;
+    HTMLParser* parser;
+    bool inWrite;
+    bool m_fragment;
+
+    OwnPtr<PreloadScanner> m_preloadScanner;
+};
+
+void parseHTMLDocumentFragment(const String&, DocumentFragment*);
+
+UChar decodeNamedEntity(const char*);
+
+} // namespace WebCore
+
+#endif // HTMLTokenizer_h