Differential D2015 Diff 4746 src/backends/julia/juliahighlighter.cpp

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src/backends/julia/juliahighlighter.cpp

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		1		/*
		2		* This program is free software; you can redistribute it and/or
		3		* modify it under the terms of the GNU General Public License
		4		* as published by the Free Software Foundation; either version 2
		5		* of the License, or (at your option) any later version.
		6		*
		7		* This program is distributed in the hope that it will be useful,
		8		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		9		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		10		* GNU General Public License for more details.
		11		*
		12		* You should have received a copy of the GNU General Public License
		13		* along with this program; if not, write to the Free Software
		14		* Foundation, Inc., 51 Franklin Street, Fifth Floor,
		15		* Boston, MA 02110-1301, USA.
		16		*
		17		* ---
		18		* Copyright (C) 2016 Ivan Lakhtanov <ivan.lakhtanov@gmail.com>
		19		*/
		20
		21		#include "juliahighlighter.h"
		22		#include "juliakeywords.h"
		23
		24		#include <climits>
		25		#include <QTextEdit>
		26
		27		JuliaHighlighter::JuliaHighlighter(QObject *parent)
		28		: Cantor::DefaultHighlighter(parent)
		29		{
		30		addRule(QRegExp(QLatin1String("\\b\\w+(?=\\()")), functionFormat());
		31
		32		// Code highlighting the different keywords
		33		addKeywords(JuliaKeywords::instance()->keywords());
		34		addVariables(JuliaKeywords::instance()->variables());
		35		}
		36
		37		void JuliaHighlighter::highlightBlock(const QString &text)
		38		{
		39		if (skipHighlighting(text)) {
		40		return;
		41		}
		42
		43		// Do some backend independent highlighting (brackets etc.)
		44		DefaultHighlighter::highlightBlock(text);
		45
		46		const int IN_MULTILINE_COMMENT = 1;
		47		const int IN_CHARACTER = 2;
		48		const int IN_SINGLE_QUOTE_STRING = 4;
		49		const int IN_TRIPLE_QUOTE_STRING = 8;
		50
		51		QRegExp multiLineCommentStart(QLatin1String("#="));
		52		QRegExp multiLineCommentEnd(QLatin1String("=#"));
		53		QRegExp characterStartEnd(QLatin1String("'"));
		54		QRegExp singleQuoteStringStartEnd(QLatin1String("\""));
		55		QRegExp tripleQuoteStringStartEnd(QLatin1String("\"\"\""));
		56		QRegExp singleLineCommentStart(QLatin1String("#(?!=)"));
		57
		58		int state = previousBlockState();
		59		if (state == -1) {
		60		state = 0;
		61		}
		62
		63		QList<int> flags = {
		64		IN_TRIPLE_QUOTE_STRING,
		65		IN_SINGLE_QUOTE_STRING,
		66		IN_CHARACTER,
		67		IN_MULTILINE_COMMENT
		68		};
		69		QList<QRegExp> regexps_starts = {
		70		tripleQuoteStringStartEnd,
		71		singleQuoteStringStartEnd,
		72		characterStartEnd,
		73		multiLineCommentStart
		74		};
		75		QList<QRegExp> regexps_ends = {
		76		tripleQuoteStringStartEnd,
		77		singleQuoteStringStartEnd,
		78		characterStartEnd,
		79		multiLineCommentEnd
		80		};
		81		QList<QTextCharFormat> formats = {
		82		stringFormat(),
		83		stringFormat(),
		84		stringFormat(),
		85		commentFormat()
		86		};
		87
		88		int pos = 0;
		89		while (pos < text.length()) {
		90		// Trying to close current environments
		91		bool triggered = false;
		92		for (int i = 0; i < flags.size() and not triggered; i++) {
		93		int flag = flags[i];
		94		QRegExp &regexp = regexps_ends[i];
		95		QTextCharFormat &format = formats[i];
		96		if (state & flag) {
		97		int new_pos = regexp.indexIn(text, pos);
		98		int length;
		99		if (new_pos == -1) {
		100		length = text.length() - pos;
		101		} else {
		102		length = new_pos - pos + regexp.matchedLength();
		103		state -= flag;
		104		}
		105		setFormat(pos, length, format);
		106		pos = pos + length;
		107		triggered = true;
		108		}
		109		}
		110		if (triggered) {
		111		continue;
		112		}
		113
		114		QRegExp *minRegexp = nullptr;
		115		int minPos = INT_MAX;
		116		int minIdx = -1;
		117		for (int i = 0; i < regexps_starts.size(); i++) {
		118		QRegExp &regexp = regexps_starts[i];
		119		int newPos = regexp.indexIn(text, pos);
		120		if (newPos != -1) {
		121		minPos = qMin(minPos, newPos);
		122		minRegexp = &regexp;
		123		minIdx = i;
		124		}
		125		}
		126
		127		int singleLineCommentStartPos =
		128		singleLineCommentStart.indexIn(text, pos);
		129
		130		if (singleLineCommentStartPos != -1
		131		and singleLineCommentStartPos < minPos) {
		132		setFormat(pos, text.length() - pos, commentFormat());
		133		break;
		134		} else if (minRegexp) {
		135		state += flags[minIdx];
		136		pos = minPos + minRegexp->matchedLength();
		137		setFormat(minPos, minRegexp->matchedLength(), formats[minIdx]);
		138		} else {
		139		break;
		140		}
		141		}
		142
		143		setCurrentBlockState(state);
		144		}
		145
		146		void JuliaHighlighter::updateHighlight()
		147		{
		148		addVariables(JuliaKeywords::instance()->variables());
		149		rehighlight();
		150		}
		151
		152		QString JuliaHighlighter::nonSeparatingCharacters() const
		153		{
		154		return QLatin1String("[\\w\\u00A1-\\uFFFF!]");
		155		}