/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the QtSCriptTools module of the Qt Toolkit.
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** No Commercial Usage
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** contained in the Technology Preview License Agreement accompanying
** this package.
**
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** General Public License version 2.1 as published by the Free Software
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** packaging of this file. Please review the following information to
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**
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****************************************************************************/
#include "qscriptsyntaxhighlighter_p.h"
#include "private/qfunctions_p.h"
#ifndef QT_NO_SYNTAXHIGHLIGHTER
QT_BEGIN_NAMESPACE
enum ScriptIds {
Comment = 1,
Number,
String,
Type,
Keyword,
PreProcessor,
Label
};
#define MAX_KEYWORD 63
static const char *const keywords[MAX_KEYWORD] = {
"Infinity",
"NaN",
"abstract",
"boolean",
"break",
"byte",
"case",
"catch",
"char",
"class",
"const",
"constructor",
"continue",
"debugger",
"default",
"delete",
"do",
"double",
"else",
"enum",
"export",
"extends",
"false",
"final",
"finally",
"float",
"for",
"function",
"goto",
"if",
"implements",
"import",
"in",
"instanceof",
"int",
"interface",
"long",
"native",
"new",
"package",
"private",
"protected",
"public",
"return",
"short",
"static",
"super",
"switch",
"synchronized",
"this",
"throw",
"throws",
"transient",
"true",
"try",
"typeof",
"undefined",
"var",
"void",
"volatile",
"while",
"with", // end of array
0
};
struct KeywordHelper
{
inline KeywordHelper(const QString &word) : needle(word) {}
const QString needle;
};
Q_STATIC_GLOBAL_OPERATOR bool operator<(const KeywordHelper &helper, const char *kw)
{
return helper.needle < QLatin1String(kw);
}
Q_STATIC_GLOBAL_OPERATOR bool operator<(const char *kw, const KeywordHelper &helper)
{
return QLatin1String(kw) < helper.needle;
}
static bool isKeyword(const QString &word)
{
const char * const *start = &keywords[0];
const char * const *end = &keywords[MAX_KEYWORD - 1];
const char * const *kw = qBinaryFind(start, end, KeywordHelper(word));
return kw != end;
}
QScriptSyntaxHighlighter::QScriptSyntaxHighlighter(QTextDocument *document)
: QSyntaxHighlighter(document)
{
m_formats[ScriptNumberFormat].setForeground(Qt::darkBlue);
m_formats[ScriptStringFormat].setForeground(Qt::darkGreen);
m_formats[ScriptTypeFormat].setForeground(Qt::darkMagenta);
m_formats[ScriptKeywordFormat].setForeground(Qt::darkYellow);
m_formats[ScriptPreprocessorFormat].setForeground(Qt::darkBlue);
m_formats[ScriptLabelFormat].setForeground(Qt::darkRed);
m_formats[ScriptCommentFormat].setForeground(Qt::darkGreen);
m_formats[ScriptCommentFormat].setFontItalic(true);
}
QScriptSyntaxHighlighter::~QScriptSyntaxHighlighter()
{
}
void QScriptSyntaxHighlighter::highlightBlock(const QString &text)
{
// states
enum States { StateStandard, StateCommentStart1, StateCCommentStart2,
StateScriptCommentStart2, StateCComment, StateScriptComment, StateCCommentEnd1,
StateCCommentEnd2, StateStringStart, StateString, StateStringEnd,
StateString2Start, StateString2, StateString2End,
StateNumber, StatePreProcessor, NumStates };
// tokens
enum Tokens { InputAlpha, InputNumber, InputAsterix, InputSlash, InputParen,
InputSpace, InputHash, InputQuotation, InputApostrophe, InputSep, NumTokens };
static uchar table[NumStates][NumTokens] = {
{ StateStandard, StateNumber, StateStandard, StateCommentStart1, StateStandard, StateStandard, StatePreProcessor, StateStringStart, StateString2Start, StateStandard }, // StateStandard
{ StateStandard, StateNumber, StateCCommentStart2, StateScriptCommentStart2, StateStandard, StateStandard, StatePreProcessor, StateStringStart, StateString2Start, StateStandard }, // StateCommentStart1
{ StateCComment, StateCComment, StateCCommentEnd1, StateCComment, StateCComment, StateCComment, StateCComment, StateCComment, StateCComment, StateCComment }, // StateCCommentStart2
{ StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment }, // ScriptCommentStart2
{ StateCComment, StateCComment, StateCCommentEnd1, StateCComment, StateCComment, StateCComment, StateCComment, StateCComment, StateCComment, StateCComment }, // StateCComment
{ StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment, StateScriptComment }, // StateScriptComment
{ 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;
int braceDepth = 0;
const int previousState = previousBlockState();
if (previousState != -1) {
state = previousState & 0xff;
braceDepth = previousState >> 8;
}
if (text.isEmpty()) {
setCurrentBlockState(previousState);
#if 0
TextEditDocumentLayout::clearParentheses(currentBlock());
#endif
return;
}
#if 0
Parentheses parentheses;
parentheses.reserve(20); // assume wizard level ;-)
#endif
int input = -1;
int i = 0;
bool lastWasBackSlash = false;
bool makeLastStandard = false;
static const QString alphabeth = QLatin1String("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
static const QString mathChars = QLatin1String("xXeE");
static const QString numbers = QLatin1String("0123456789");
bool questionMark = false;
QChar lastChar;
int firstNonSpace = -1;
int lastNonSpace = -1;
for (;;) {
const QChar c = text.at(i);
if (lastWasBackSlash) {
input = InputSep;
} else {
switch (c.toAscii()) {
case '*':
input = InputAsterix;
break;
case '/':
input = InputSlash;
break;
case '{':
braceDepth++;
// fall through
case '(': case '[':
input = InputParen;
switch (state) {
case StateStandard:
case StateNumber:
case StatePreProcessor:
case StateCCommentEnd2:
case StateCCommentEnd1:
case StateString2End:
case StateStringEnd:
// parentheses.push_back(Parenthesis(Parenthesis::Opened, c, i));
break;
default:
break;
}
break;
case '}':
if (--braceDepth < 0)
braceDepth = 0;
// fall through
case ')': case ']':
input = InputParen;
switch (state) {
case StateStandard:
case StateNumber:
case StatePreProcessor:
case StateCCommentEnd2:
case StateCCommentEnd1:
case StateString2End:
case StateStringEnd:
// parentheses.push_back(Parenthesis(Parenthesis::Closed, c, i));
break;
default:
break;
}
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;
const QChar colon = QLatin1Char(':');
if (state == StateStandard && !questionMark && lastChar != colon) {
const QChar nextChar = i < text.length() - 1 ? text.at(i + 1) : QLatin1Char(' ');
if (nextChar != colon)
for (int j = 0; j < i; ++j) {
if (format(j) == emptyFormat )
setFormat(j, 1, m_formats[ScriptLabelFormat]);
}
}
} 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 (input != InputAlpha) {
highlightWord(i, buffer);
buffer = QString::null;
}
} break;
case StateCommentStart1:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = true;
buffer = QString::null;
break;
case StateCCommentStart2:
setFormat(i - 1, 2, m_formats[ScriptCommentFormat]);
makeLastStandard = false;
// parentheses.push_back(Parenthesis(Parenthesis::Opened, QLatin1Char('/'), i-1));
buffer = QString::null;
break;
case StateScriptCommentStart2:
setFormat(i - 1, 2, m_formats[ScriptCommentFormat]);
makeLastStandard = false;
buffer = QString::null;
break;
case StateCComment:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[ScriptCommentFormat]);
buffer = QString::null;
break;
case StateScriptComment:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[ScriptCommentFormat]);
buffer = QString::null;
break;
case StateCCommentEnd1:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[ScriptCommentFormat]);
buffer = QString::null;
break;
case StateCCommentEnd2:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[ScriptCommentFormat]);
// parentheses.push_back(Parenthesis(Parenthesis::Closed, QLatin1Char('/'), i));
buffer = QString::null;
break;
case StateStringStart:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, emptyFormat);
buffer = QString::null;
break;
case StateString:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[ScriptStringFormat]);
buffer = QString::null;
break;
case StateStringEnd:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, emptyFormat);
buffer = QString::null;
break;
case StateString2Start:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, emptyFormat);
buffer = QString::null;
break;
case StateString2:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[ScriptStringFormat]);
buffer = QString::null;
break;
case StateString2End:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, emptyFormat);
buffer = QString::null;
break;
case StateNumber:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[ScriptNumberFormat]);
buffer = QString::null;
break;
case StatePreProcessor:
if (makeLastStandard)
setFormat(i - 1, 1, emptyFormat);
makeLastStandard = false;
setFormat(i, 1, m_formats[ScriptPreprocessorFormat]);
buffer = QString::null;
break;
}
lastChar = c;
i++;
if (i >= text.length()) {
#if 0
if (TextBlockUserData *userData = TextEditDocumentLayout::testUserData(currentBlock())) {
userData->setHasClosingCollapse(false);
userData->setCollapseMode(TextBlockUserData::NoCollapse);
}
int collapse = Parenthesis::collapseAtPos(parentheses);
if (collapse >= 0) {
if (collapse == firstNonSpace)
TextEditDocumentLayout::userData(currentBlock())->setCollapseMode(TextBlockUserData::CollapseThis);
else
TextEditDocumentLayout::userData(currentBlock())->setCollapseMode(TextBlockUserData::CollapseAfter);
}
if (Parenthesis::hasClosingCollapse(parentheses)) {
TextEditDocumentLayout::userData(currentBlock())->setHasClosingCollapse(true);
}
#endif
break;
}
}
highlightWord(text.length(), buffer);
switch (state) {
case StateCComment:
case StateCCommentEnd1:
case StateCCommentStart2:
state = StateCComment;
break;
case StateString:
// quotes cannot span multiple lines, so if somebody starts
// typing a quoted string we don't need to look for the ending
// quote in another line (or highlight until the end of the
// document) and therefore slow down editing.
state = StateStandard;
break;
case StateString2:
state = StateStandard;
break;
default:
state = StateStandard;
break;
}
#if 0
TextEditDocumentLayout::setParentheses(currentBlock(), parentheses);
#endif
setCurrentBlockState((braceDepth << 8) | state);
}
void QScriptSyntaxHighlighter::highlightWord(int currentPos, const QString &buffer)
{
if (buffer.isEmpty())
return;
// try to highlight Qt 'identifiers' like QObject and Q_PROPERTY
// but don't highlight words like 'Query'
if (buffer.length() > 1
&& buffer.at(0) == QLatin1Char('Q')
&& (buffer.at(1).isUpper()
|| buffer.at(1) == QLatin1Char('_')
|| buffer.at(1) == QLatin1Char('t'))) {
setFormat(currentPos - buffer.length(), buffer.length(), m_formats[ScriptTypeFormat]);
} else {
if (isKeyword(buffer))
setFormat(currentPos - buffer.length(), buffer.length(), m_formats[ScriptKeywordFormat]);
}
}
QT_END_NAMESPACE
#endif // QT_NO_SYNTAXHIGHLIGHTER