////  ScriptHighlighting.cpp//  interface/src////  Created by Thijs Wenker on 4/15/14.//  Copyright 2014 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include "ScriptHighlighting.h"#include <QTextDocument> ScriptHighlighting::ScriptHighlighting(QTextDocument* parent) :    QSyntaxHighlighter(parent){    _keywordRegex = QRegExp("\\b(break|case|catch|continue|debugger|default|delete|do|else|finally|for|function|if|in|instanceof|new|return|switch|this|throw|try|typeof|var|void|while|with)\\b");    _quotedTextRegex = QRegExp("(\"[^\"]*(\"){0,1}|\'[^\']*(\'){0,1})");    _multiLineCommentBegin = QRegExp("/\\*");    _multiLineCommentEnd = QRegExp("\\*/");    _numberRegex = QRegExp("[0-9]+(\\.[0-9]+){0,1}");    _singleLineComment = QRegExp("//[^\n]*");    _truefalseRegex = QRegExp("\\b(true|false)\\b");    _alphacharRegex = QRegExp("[A-Za-z]");} void ScriptHighlighting::highlightBlock(const QString& text) {    this->highlightKeywords(text);    this->formatNumbers(text);    this->formatTrueFalse(text);    this->formatQuotedText(text);    this->formatComments(text);} void ScriptHighlighting::highlightKeywords(const QString& text) {    int index = _keywordRegex.indexIn(text);    while (index >= 0) {        int length = _keywordRegex.matchedLength();        setFormat(index, length, Qt::blue);        index = _keywordRegex.indexIn(text, index + length);    }} void ScriptHighlighting::formatComments(const QString& text) {     setCurrentBlockState(BlockStateClean);     int start = (previousBlockState() != BlockStateInMultiComment) ? text.indexOf(_multiLineCommentBegin) : 0;     while (start > -1) {        int end = text.indexOf(_multiLineCommentEnd, start);        int length = (end == -1 ? text.length() : (end + _multiLineCommentEnd.matchedLength())) - start;        setFormat(start, length, Qt::lightGray);        start = text.indexOf(_multiLineCommentBegin, start + length);        if (end == -1) {            setCurrentBlockState(BlockStateInMultiComment);        }    }     int index = _singleLineComment.indexIn(text);    while (index >= 0) {        int length = _singleLineComment.matchedLength();        int quoted_index = _quotedTextRegex.indexIn(text);        bool valid = true;        while (quoted_index >= 0 && valid) {            int quoted_length = _quotedTextRegex.matchedLength();            if (quoted_index <= index && index <= (quoted_index + quoted_length)) {                valid = false;            }            quoted_index = _quotedTextRegex.indexIn(text, quoted_index + quoted_length);        }         if (valid) {            setFormat(index, length, Qt::lightGray);        }        index = _singleLineComment.indexIn(text, index + length);    }} void ScriptHighlighting::formatQuotedText(const QString& text){    int index = _quotedTextRegex.indexIn(text);    while (index >= 0) {        int length = _quotedTextRegex.matchedLength();        setFormat(index, length, Qt::red);        index = _quotedTextRegex.indexIn(text, index + length);    }} void ScriptHighlighting::formatNumbers(const QString& text){    int index = _numberRegex.indexIn(text);    while (index >= 0) {        int length = _numberRegex.matchedLength();        if (index == 0 || _alphacharRegex.indexIn(text, index - 1) != (index - 1)) {            setFormat(index, length, Qt::green);        }        index = _numberRegex.indexIn(text, index + length);    }} void ScriptHighlighting::formatTrueFalse(const QString& text){    int index = _truefalseRegex.indexIn(text);    while (index >= 0) {        int length = _truefalseRegex.matchedLength();        QFont* font = new QFont(this->document()->defaultFont());        font->setBold(true);        setFormat(index, length, *font);        index = _truefalseRegex.indexIn(text, index + length);    }}