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qt-creator/shared/qscripthighlighter/qscripthighlighter.cpp

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Initial import
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/***************************************************************************
**
** This file is part of Qt Creator
**
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** Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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**
** Contact: Qt Software Information (qt-info@nokia.com)
**
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**
** Non-Open Source Usage
**
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** Licensees may use this file in accordance with the Qt Beta Version
** License Agreement, Agreement version 2.2 provided with the Software or,
** alternatively, in accordance with the terms contained in a written
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** agreement between you and Nokia.
**
** GNU General Public License Usage
**
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** Alternatively, this file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the packaging
** of this file. Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
**
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.
**
** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt GPL Exception
chancge Nokia GPL exception version from 1.2 to 1.3
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** version 1.3, included in the file GPL_EXCEPTION.txt in this package.
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**
***************************************************************************/
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Initial import
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#include "qscripthighlighter.h"
#include <QtCore/QSet>
#include <QtCore/QtAlgorithms>
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;
}
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namespace SharedTools {
Initial import
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QScriptHighlighter::QScriptHighlighter(QTextDocument *parent)
: QSyntaxHighlighter(parent)
{
setFormats(defaultFormats());
}
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 = onBlockStart();
if (text.isEmpty()) {
onBlockEnd(state, 0);
return;
}
int input = -1;
int i = 0;
bool lastWasBackSlash = false;
bool makeLastStandard = false;
static const QString alphabeth = QLatin1String("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
static const QString mathChars = QString::fromLatin1("xXeE");
static const QString numbers = QString::fromLatin1("0123456789");
bool questionMark = false;
QChar lastChar;
int firstNonSpace = -1;
int lastNonSpace = -1;
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
|| state == StateNumber
|| state == StatePreProcessor
|| state == StateCCommentEnd2
|| state == StateCCommentEnd1
|| state == StateString2End
|| state == StateStringEnd
)
onOpeningParenthesis(c, i);
break;
case ')': case ']': case '}':
input = InputParen;
if (state == StateStandard
|| state == StateNumber
|| state == StatePreProcessor
|| state == StateCCommentEnd2
|| state == StateCCommentEnd1
|| state == StateString2End
|| state == StateStringEnd
) {
onClosingParenthesis(c, i);
}
break;
case '#':
input = InputHash;
break;
case '"':
input = InputQuotation;
break;
case '\'':
input = InputApostrophe;
break;
case ' ':
input = InputSpace;
break;
case '1': case '2': case '3': case '4': case '5':
case '6': case '7': case '8': case '9': case '0':
if (alphabeth.contains(lastChar)
&& (!mathChars.contains(lastChar) || !numbers.contains(text.at(i - 1)))) {
input = InputAlpha;
} else {
if (input == InputAlpha && numbers.contains(lastChar))
input = InputAlpha;
else
input = InputNumber;
}
break;
case ':': {
input = InputAlpha;
QChar nextChar = ' ';
if (i < text.length() - 1)
nextChar = text.at(i + 1);
if (state == StateStandard && !questionMark &&
lastChar != ':' && nextChar != ':') {
for (int j = 0; j < i; ++j) {
if (format(j) == emptyFormat)
setFormat(j, 1, m_formats[LabelFormat]);
}
}
break;
}
default: {
if (!questionMark && c == QLatin1Char('?'))
questionMark = true;
if (c.isLetter() || c == QLatin1Char('_'))
input = InputAlpha;
else
input = InputSep;
} break;
}
}
if (input != InputSpace) {
if (firstNonSpace < 0)
firstNonSpace = i;
lastNonSpace = i;
}
lastWasBackSlash = !lastWasBackSlash && c == QLatin1Char('\\');
if (input == InputAlpha)
buffer += c;
state = table[state][input];
switch (state) {
case StateStandard: {
setFormat(i, 1, emptyFormat);
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
if (!buffer.isEmpty() && input != InputAlpha ) {
highlightKeyword(i, buffer);
buffer.clear();
}
} break;
case StateCommentStart1:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = true;
buffer.resize(0);
break;
case StateCCommentStart2:
setFormat(i - 1, 2, m_formats[CommentFormat]);
makeLastStandard = false;
buffer.resize(0);
break;
case StateCppCommentStart2:
setFormat(i - 1, 2, m_formats[CommentFormat]);
makeLastStandard = false;
buffer.resize(0);
break;
case StateCComment:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[CommentFormat]);
buffer.resize(0);
break;
case StateCppComment:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[CommentFormat]);
buffer.resize(0);
break;
case StateCCommentEnd1:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[CommentFormat]);
buffer.resize(0);
break;
case StateCCommentEnd2:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[CommentFormat]);
buffer.resize(0);
break;
case StateStringStart:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, emptyFormat);
buffer.resize(0);
break;
case StateString:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[StringFormat]);
buffer.resize(0);
break;
case StateStringEnd:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, emptyFormat);
buffer.resize(0);
break;
case StateString2Start:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, emptyFormat);
buffer.resize(0);
break;
case StateString2:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[StringFormat]);
buffer.resize(0);
break;
case StateString2End:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, emptyFormat);
buffer.resize(0);
break;
case StateNumber:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat( i, 1, m_formats[NumberFormat]);
buffer.resize(0);
break;
case StatePreProcessor:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[PreProcessorFormat]);
buffer.resize(0);
break;
}
lastChar = c;
i++;
if (i >= text.length())
break;
}
highlightKeyword(text.length(), buffer);
if (state == StateCComment
|| state == StateCCommentEnd1
|| state == StateCCommentStart2
) {
state = StateCComment;
} else if (state == StateString) {
state = StateString;
} else if (state == StateString2) {
state = StateString2;
} else {
state = StateStandard;
}
onBlockEnd(state, firstNonSpace);
}
void QScriptHighlighter::highlightKeyword(int currentPos, const QString &buffer)
{
if (buffer.isEmpty())
return;
if (buffer.at(0) == QLatin1Char('Q')) {
setFormat(currentPos - buffer.length(), buffer.length(), m_formats[TypeFormat]);
} else {
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if (qscriptKeywords().contains(buffer))
Initial import
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setFormat(currentPos - buffer.length(), buffer.length(), m_formats[KeywordFormat]);
}
}
const QVector<QTextCharFormat> &QScriptHighlighter::defaultFormats()
{
static QVector<QTextCharFormat> rc;
if (rc.empty()) {
rc.resize(NumFormats);
rc[NumberFormat].setForeground(Qt::blue);
rc[StringFormat].setForeground(Qt::darkGreen);
rc[TypeFormat].setForeground(Qt::darkMagenta);
rc[KeywordFormat].setForeground(Qt::darkYellow);
rc[LabelFormat].setForeground(Qt::darkRed);
rc[CommentFormat].setForeground(Qt::red);
rc[CommentFormat].setFontItalic(true);
rc[PreProcessorFormat].setForeground(Qt::darkBlue);
}
return rc;
}
void QScriptHighlighter::setFormats(const QVector<QTextCharFormat> &s)
{
qCopy(s.constBegin(), s.constEnd(), m_formats);
}
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int QScriptHighlighter::onBlockStart()
{
Initial import
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int state = 0;
int previousState = previousBlockState();
if (previousState != -1)
state = previousState;
return state;
}
void QScriptHighlighter::onOpeningParenthesis(QChar, int) {}
void QScriptHighlighter::onClosingParenthesis(QChar, int) {}
void QScriptHighlighter::onBlockEnd(int state, int) { return setCurrentBlockState(state); }
more cosmetic changes
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} // namespace SharedTools
Initial import
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