qscripthighlighter.cpp

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**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the Qt Designer of the Qt Toolkit.
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#include "qscripthighlighter_p.h"

#include <QtCore/QSet>

static const QSet<QString> &qscriptKeywords() {
    static QSet<QString> keywords;
    if (keywords.empty()) {
        keywords.insert(QLatin1String("Infinity"));
        keywords.insert(QLatin1String("NaN"));
        keywords.insert(QLatin1String("abstract"));
        keywords.insert(QLatin1String("boolean"));
        keywords.insert(QLatin1String("break"));
        keywords.insert(QLatin1String("byte"));
        keywords.insert(QLatin1String("case"));
        keywords.insert(QLatin1String("catch"));
        keywords.insert(QLatin1String("char"));
        keywords.insert(QLatin1String("class"));
        keywords.insert(QLatin1String("const"));
        keywords.insert(QLatin1String("constructor"));
        keywords.insert(QLatin1String("continue"));
        keywords.insert(QLatin1String("debugger"));
        keywords.insert(QLatin1String("default"));
        keywords.insert(QLatin1String("delete"));
        keywords.insert(QLatin1String("do"));
        keywords.insert(QLatin1String("double"));
        keywords.insert(QLatin1String("else"));
        keywords.insert(QLatin1String("enum"));
        keywords.insert(QLatin1String("export"));
        keywords.insert(QLatin1String("extends"));
        keywords.insert(QLatin1String("false"));
        keywords.insert(QLatin1String("final"));
        keywords.insert(QLatin1String("finally"));
        keywords.insert(QLatin1String("float"));
        keywords.insert(QLatin1String("for"));
        keywords.insert(QLatin1String("function"));
        keywords.insert(QLatin1String("goto"));
        keywords.insert(QLatin1String("if"));
        keywords.insert(QLatin1String("implements"));
        keywords.insert(QLatin1String("import"));
        keywords.insert(QLatin1String("in"));
        keywords.insert(QLatin1String("instanceof"));
        keywords.insert(QLatin1String("int"));
        keywords.insert(QLatin1String("interface"));
        keywords.insert(QLatin1String("long"));
        keywords.insert(QLatin1String("native"));
        keywords.insert(QLatin1String("new"));
        keywords.insert(QLatin1String("package"));
        keywords.insert(QLatin1String("private"));
        keywords.insert(QLatin1String("protected"));
        keywords.insert(QLatin1String("public"));
        keywords.insert(QLatin1String("return"));
        keywords.insert(QLatin1String("short"));
        keywords.insert(QLatin1String("static"));
        keywords.insert(QLatin1String("super"));
        keywords.insert(QLatin1String("switch"));
        keywords.insert(QLatin1String("synchronized"));
        keywords.insert(QLatin1String("this"));
        keywords.insert(QLatin1String("throw"));
        keywords.insert(QLatin1String("throws"));
        keywords.insert(QLatin1String("transient"));
        keywords.insert(QLatin1String("true"));
        keywords.insert(QLatin1String("try"));
        keywords.insert(QLatin1String("typeof"));
        keywords.insert(QLatin1String("undefined"));
        keywords.insert(QLatin1String("var"));
        keywords.insert(QLatin1String("void"));
        keywords.insert(QLatin1String("volatile"));
        keywords.insert(QLatin1String("while"));
        keywords.insert(QLatin1String("with"));    // end
    }
    return keywords;
}

static QSet<QChar> alphaChars() {
    QSet<QChar> rc;
    const QString alpha = QLatin1String("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
    foreach (QChar chr, alpha)
        rc.insert(chr);
    return rc;
}

namespace qdesigner_internal {

QScriptHighlighter::QScriptHighlighter(QTextDocument *parent)
    : QSyntaxHighlighter(parent)
{
    m_numberFormat.setForeground(Qt::blue);
    m_stringFormat.setForeground(Qt::darkGreen);
    m_typeFormat.setForeground(Qt::darkMagenta);
    m_keywordFormat.setForeground(Qt::darkYellow);
    m_labelFormat.setForeground(Qt::darkRed);
    m_commentFormat.setForeground(Qt::red);
    //m_commentFormat.setFontFamily("times");
    m_commentFormat.setFontItalic(true);
    m_preProcessorFormat.setForeground(Qt::darkBlue);
}

void QScriptHighlighter::highlightBlock(const QString &text)
{
    // states
    enum {
        StateStandard,
        StateCommentStart1,
        StateCCommentStart2,
        StateCppCommentStart2,
        StateCComment,
        StateCppComment,
        StateCCommentEnd1,
        StateCCommentEnd2,
        StateStringStart,
        StateString,
        StateStringEnd,
        StateString2Start,
        StateString2,
        StateString2End,
        StateNumber,
        StatePreProcessor,
        NumStates
    };
    // tokens
    enum {
        InputAlpha,
        InputNumber,
        InputAsterix,
        InputSlash,
        InputParen,
        InputSpace,
        InputHash,
        InputQuotation,
        InputApostrophe,
        InputSep,
        NumInputs
    };

    static const uchar table[NumStates][NumInputs] = {
        { StateStandard,      StateNumber,     StateStandard,       StateCommentStart1,    StateStandard,   StateStandard,   StatePreProcessor, StateStringStart, StateString2Start, StateStandard }, // StateStandard
        { StateStandard,      StateNumber,   StateCCommentStart2, StateCppCommentStart2, StateStandard,   StateStandard,   StatePreProcessor, StateStringStart, StateString2Start, StateStandard }, // StateCommentStart1
        { StateCComment,      StateCComment,   StateCCommentEnd1,   StateCComment,         StateCComment,   StateCComment,   StateCComment,     StateCComment,    StateCComment,     StateCComment }, // StateCCommentStart2
        { StateCppComment,    StateCppComment, StateCppComment,     StateCppComment,       StateCppComment, StateCppComment, StateCppComment,   StateCppComment,  StateCppComment,   StateCppComment }, // CppCommentStart2
        { StateCComment,      StateCComment,   StateCCommentEnd1,   StateCComment,         StateCComment,   StateCComment,   StateCComment,     StateCComment,    StateCComment,     StateCComment }, // StateCComment
        { StateCppComment,    StateCppComment, StateCppComment,     StateCppComment,       StateCppComment, StateCppComment, StateCppComment,   StateCppComment,  StateCppComment,   StateCppComment }, // StateCppComment
        { StateCComment,      StateCComment,   StateCCommentEnd1,   StateCCommentEnd2,     StateCComment,   StateCComment,   StateCComment,     StateCComment,    StateCComment,     StateCComment }, // StateCCommentEnd1
        { StateStandard,      StateNumber,     StateStandard,       StateCommentStart1,    StateStandard,   StateStandard,   StatePreProcessor, StateStringStart, StateString2Start, StateStandard }, // StateCCommentEnd2
        { StateString,        StateString,     StateString,         StateString,           StateString,     StateString,     StateString,       StateStringEnd,   StateString,       StateString }, // StateStringStart
        { StateString,        StateString,     StateString,         StateString,           StateString,     StateString,     StateString,       StateStringEnd,   StateString,       StateString }, // StateString
        { StateStandard,      StateStandard,   StateStandard,       StateCommentStart1,    StateStandard,   StateStandard,   StatePreProcessor, StateStringStart, StateString2Start, StateStandard }, // StateStringEnd
        { StateString2,       StateString2,    StateString2,        StateString2,          StateString2,    StateString2,    StateString2,      StateString2,     StateString2End,   StateString2 }, // StateString2Start
        { StateString2,       StateString2,    StateString2,        StateString2,          StateString2,    StateString2,    StateString2,      StateString2,     StateString2End,   StateString2 }, // StateString2
        { StateStandard,      StateStandard,   StateStandard,       StateCommentStart1,    StateStandard,   StateStandard,   StatePreProcessor, StateStringStart, StateString2Start, StateStandard }, // StateString2End
        { StateNumber,        StateNumber,     StateStandard,       StateCommentStart1,    StateStandard,   StateStandard,   StatePreProcessor, StateStringStart, StateString2Start, StateStandard }, // StateNumber
        { StatePreProcessor,  StateStandard,   StateStandard,       StateCommentStart1,    StateStandard,   StateStandard,   StatePreProcessor, StateStringStart, StateString2Start, StateStandard } // StatePreProcessor
    };

    QString buffer;
    buffer.reserve(text.length());
    QTextCharFormat emptyFormat;

    int state = StateStandard;
    const int previousState = previousBlockState();
    if (previousState != -1)
        state = previousState;

    if (text.isEmpty()) {
        setCurrentBlockState(previousState);
        return;
    }

    int input = -1;
    int i = 0;
    bool lastWasBackSlash = false;
    bool makeLastStandard = false;

    static const QSet<QChar> alphabeth = alphaChars();
    static const QString mathChars = QString::fromLatin1("xXeE");
    static const QString numbers = QString::fromLatin1("0123456789");
    bool questionMark = false;
    QChar lastChar;
    QString firstWord;
    forever {
        const QChar c = text.at(i);

        if (lastWasBackSlash) {
            input = InputSep;
        } else {
            switch (c.toLatin1()) {
                case '*':
                    input = InputAsterix;
                    break;
                case '/':
                    input = InputSlash;
                    break;
                case '(': case '[': case '{':
                    input = InputParen;
                    if (state == StateStandard