forked from qt-creator/qt-creator
Moved the QScriptHighlighter & friends into the QmlJS library.
This commit is contained in:
Erik Verbruggen
268
src/libs/qmljs/qscripthighlighter.cpp
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268
src/libs/qmljs/qscripthighlighter.cpp
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/**************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at http://qt.nokia.com/contact.
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**
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**************************************************************************/
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#include "qscripthighlighter.h"
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#include <QtCore/QSet>
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#include <QtCore/QtAlgorithms>
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using namespace SharedTools;
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QScriptHighlighter::QScriptHighlighter(bool duiEnabled, QTextDocument *parent):
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QSyntaxHighlighter(parent),
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m_duiEnabled(duiEnabled)
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{
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QVector<QTextCharFormat> rc;
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rc.resize(NumFormats);
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rc[NumberFormat].setForeground(Qt::blue);
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rc[StringFormat].setForeground(Qt::darkGreen);
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rc[TypeFormat].setForeground(Qt::darkMagenta);
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rc[KeywordFormat].setForeground(Qt::darkYellow);
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rc[LabelFormat].setForeground(Qt::darkRed);
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rc[CommentFormat].setForeground(Qt::red); rc[CommentFormat].setFontItalic(true);
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rc[PreProcessorFormat].setForeground(Qt::darkBlue);
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rc[VisualWhitespace].setForeground(Qt::lightGray); // for debug: rc[VisualWhitespace].setBackground(Qt::red);
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setFormats(rc);
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m_scanner.setKeywords(keywords());
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}
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bool QScriptHighlighter::isDuiEnabled() const
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{ return m_duiEnabled; }
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void QScriptHighlighter::highlightBlock(const QString &text)
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{
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m_scanner(text, onBlockStart());
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QTextCharFormat emptyFormat;
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int lastEnd = 0;
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const QList<QScriptIncrementalScanner::Token> tokens = m_scanner.tokens();
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for (int i = 0; i < tokens.size(); ++i) {
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const QScriptIncrementalScanner::Token token = tokens.at(i);
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if (token.offset != lastEnd)
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setFormat(lastEnd, token.offset - lastEnd, m_formats[VisualWhitespace]);
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switch (token.kind) {
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case QScriptIncrementalScanner::Token::Keyword:
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setFormat(token.offset, token.length, m_formats[KeywordFormat]);
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break;
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case QScriptIncrementalScanner::Token::String:
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highlightWhitespace(token, text, StringFormat);
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break;
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case QScriptIncrementalScanner::Token::Comment:
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highlightWhitespace(token, text, CommentFormat);
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break;
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case QScriptIncrementalScanner::Token::Number:
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highlightWhitespace(token, text, NumberFormat);
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break;
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case QScriptIncrementalScanner::Token::LeftParenthesis:
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onOpeningParenthesis('(', token.offset);
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break;
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case QScriptIncrementalScanner::Token::RightParenthesis:
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onClosingParenthesis(')', token.offset);
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break;
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case QScriptIncrementalScanner::Token::LeftBrace:
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onOpeningParenthesis('{', token.offset);
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break;
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case QScriptIncrementalScanner::Token::RightBrace:
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onClosingParenthesis('}', token.offset);
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break;
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case QScriptIncrementalScanner::Token::LeftBracket:
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onOpeningParenthesis('[', token.offset);
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break;
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case QScriptIncrementalScanner::Token::RightBracket:
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onClosingParenthesis(']', token.offset);
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break;
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case QScriptIncrementalScanner::Token::Identifier:
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if (m_duiEnabled && (i + 1 != tokens.size()) && tokens.at(i + 1).kind == QScriptIncrementalScanner::Token::Colon) {
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int j = i;
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for (; j != -1; --j) {
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const QScriptIncrementalScanner::Token &tok = tokens.at(j);
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if (tok.is(QScriptIncrementalScanner::Token::Dot) || tok.is(QScriptIncrementalScanner::Token::Identifier)) {
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setFormat(tok.offset, tok.length, m_formats[LabelFormat]);
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} else {
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break;
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}
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}
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} else {
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const QChar c = text.at(token.offset);
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if ((m_duiEnabled && c.isUpper()) || (!m_duiEnabled && c == QLatin1Char('Q')))
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setFormat(token.offset, token.length, m_formats[TypeFormat]);
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else
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setFormat(token.offset, token.length, emptyFormat);
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}
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break;
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case QScriptIncrementalScanner::Token::Colon:
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if (m_duiEnabled && i > 0 && tokens.at(i - 1).kind == QScriptIncrementalScanner::Token::Identifier)
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setFormat(token.offset, token.length, m_formats[LabelFormat]);
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else
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setFormat(token.offset, token.length, emptyFormat);
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break;
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case QScriptIncrementalScanner::Token::Operator:
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case QScriptIncrementalScanner::Token::Dot:
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setFormat(token.offset, token.length, emptyFormat);
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break;
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default:
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break;
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}
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lastEnd = token.end();
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}
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const int firstNonSpace = m_scanner.firstNonSpace();
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if (firstNonSpace > lastEnd)
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setFormat(lastEnd, firstNonSpace - lastEnd, m_formats[VisualWhitespace]);
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else if (text.length() > lastEnd)
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setFormat(lastEnd, text.length() - lastEnd, m_formats[VisualWhitespace]);
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onBlockEnd(m_scanner.endState(), firstNonSpace);
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}
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void QScriptHighlighter::setFormats(const QVector<QTextCharFormat> &s)
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{
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Q_ASSERT(s.size() == NumFormats);
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qCopy(s.constBegin(), s.constEnd(), m_formats);
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}
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QSet<QString> QScriptHighlighter::keywords()
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{
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QSet<QString> keywords;
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keywords << QLatin1String("Infinity");
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keywords << QLatin1String("NaN");
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keywords << QLatin1String("abstract");
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keywords << QLatin1String("boolean");
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keywords << QLatin1String("break");
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keywords << QLatin1String("byte");
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keywords << QLatin1String("case");
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keywords << QLatin1String("catch");
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keywords << QLatin1String("char");
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keywords << QLatin1String("class");
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keywords << QLatin1String("const");
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keywords << QLatin1String("constructor");
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keywords << QLatin1String("continue");
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keywords << QLatin1String("debugger");
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keywords << QLatin1String("default");
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keywords << QLatin1String("delete");
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keywords << QLatin1String("do");
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keywords << QLatin1String("double");
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keywords << QLatin1String("else");
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keywords << QLatin1String("enum");
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keywords << QLatin1String("export");
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keywords << QLatin1String("extends");
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keywords << QLatin1String("false");
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keywords << QLatin1String("final");
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keywords << QLatin1String("finally");
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keywords << QLatin1String("float");
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keywords << QLatin1String("for");
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keywords << QLatin1String("function");
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keywords << QLatin1String("goto");
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keywords << QLatin1String("if");
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keywords << QLatin1String("implements");
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keywords << QLatin1String("import");
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keywords << QLatin1String("in");
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keywords << QLatin1String("instanceof");
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keywords << QLatin1String("int");
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keywords << QLatin1String("interface");
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keywords << QLatin1String("long");
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keywords << QLatin1String("native");
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keywords << QLatin1String("new");
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keywords << QLatin1String("package");
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keywords << QLatin1String("private");
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keywords << QLatin1String("protected");
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keywords << QLatin1String("public");
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keywords << QLatin1String("return");
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keywords << QLatin1String("short");
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keywords << QLatin1String("static");
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keywords << QLatin1String("super");
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keywords << QLatin1String("switch");
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keywords << QLatin1String("synchronized");
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keywords << QLatin1String("this");
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keywords << QLatin1String("throw");
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keywords << QLatin1String("throws");
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keywords << QLatin1String("transient");
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keywords << QLatin1String("true");
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keywords << QLatin1String("try");
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keywords << QLatin1String("typeof");
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keywords << QLatin1String("undefined");
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keywords << QLatin1String("var");
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keywords << QLatin1String("void");
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keywords << QLatin1String("volatile");
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keywords << QLatin1String("while");
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keywords << QLatin1String("with");
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return keywords;
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}
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int QScriptHighlighter::onBlockStart()
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{
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int state = 0;
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int previousState = previousBlockState();
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if (previousState != -1)
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state = previousState;
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return state;
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}
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void QScriptHighlighter::onOpeningParenthesis(QChar, int) {}
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void QScriptHighlighter::onClosingParenthesis(QChar, int) {}
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void QScriptHighlighter::onBlockEnd(int state, int) { return setCurrentBlockState(state); }
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void QScriptHighlighter::highlightWhitespace(const QScriptIncrementalScanner::Token &token, const QString &text, int nonWhitespaceFormat)
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{
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const QTextCharFormat normalFormat = m_formats[nonWhitespaceFormat];
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const QTextCharFormat visualSpaceFormat = m_formats[VisualWhitespace];
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const int end = token.end();
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int index = token.offset;
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while (index != end) {
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const bool isSpace = text.at(index).isSpace();
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const int start = index;
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do { ++index; }
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while (index != end && text.at(index).isSpace() == isSpace);
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const int tokenLength = index - start;
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setFormat(start, tokenLength, isSpace ? visualSpaceFormat : normalFormat);
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}
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}
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