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+/*============================================================================
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+ CMake - Cross Platform Makefile Generator
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+ Copyright 2015 Kitware, Inc., Gregor Jasny
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+
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+ Distributed under the OSI-approved BSD License (the "License");
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+ see accompanying file Copyright.txt for details.
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+
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+ This software is distributed WITHOUT ANY WARRANTY; without even the
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+ implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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+ See the License for more information.
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+============================================================================*/
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+
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+#include "RegexExplorer.h"
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+
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+RegexExplorer::RegexExplorer(QWidget* p) : QDialog(p), m_matched(false)
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+{
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+ this->setupUi(this);
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+
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+ for(int i = 1; i < cmsys::RegularExpression::NSUBEXP; ++i)
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+ {
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+ matchNumber->addItem(
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+ QString("Match %1").arg(QString::number(i)),
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+ QVariant(i));
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+ }
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+ matchNumber->setCurrentIndex(0);
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+}
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+
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+void RegexExplorer::setStatusColor(QWidget* widget, bool successful)
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+{
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+ QColor color = successful ? QColor(0, 127, 0) : Qt::red;
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+
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+ QPalette palette = widget->palette();
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+ palette.setColor(QPalette::Foreground, color);
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+ widget->setPalette(palette);
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+}
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+
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+void RegexExplorer::on_regularExpression_textChanged(const QString& text)
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+{
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+#ifdef QT_NO_STL
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+ m_regex = text.toAscii().constData();
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+#else
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+ m_regex = text.toStdString();
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+#endif
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+
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+ bool validExpression =
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+ stripEscapes(m_regex) && m_regexParser.compile(m_regex);
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+ if(!validExpression)
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+ {
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+ m_regexParser.set_invalid();
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+ }
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+
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+ setStatusColor(labelRegexValid, validExpression);
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+
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+ on_inputText_textChanged();
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+}
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+
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+void RegexExplorer::on_inputText_textChanged()
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+{
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+ if(m_regexParser.is_valid())
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+ {
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+ QString plainText = inputText->toPlainText();
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+#ifdef QT_NO_STL
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+ m_text = plainText.toAscii().constData();
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+#else
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+ m_text = plainText.toStdString();
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+#endif
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+ m_matched = m_regexParser.find(m_text);
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+ }
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+ else
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+ {
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+ m_matched = false;
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+ }
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+
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+ setStatusColor(labelRegexMatch, m_matched);
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+
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+ if(!m_matched)
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+ {
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+ clearMatch();
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+ return;
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+ }
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+
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+#ifdef QT_NO_STL
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+ QString matchText = m_regexParser.match(0).c_str();
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+#else
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+ QString matchText = QString::fromStdString(m_regexParser.match(0));
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+#endif
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+ match0->setPlainText(matchText);
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+
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+ on_matchNumber_currentIndexChanged(matchNumber->currentIndex());
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+}
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+
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+void RegexExplorer::on_matchNumber_currentIndexChanged(int index)
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+{
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+ if(!m_matched)
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+ {
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+ return;
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+ }
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+
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+ QVariant itemData = matchNumber->itemData(index);
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+ int idx = itemData.toInt();
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+
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+ if(idx < 1 || idx >= cmsys::RegularExpression::NSUBEXP)
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+ {
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+ return;
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+ }
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+
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+#ifdef QT_NO_STL
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+ QString match = m_regexParser.match(idx).c_str();
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+#else
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+ QString match = QString::fromStdString(m_regexParser.match(idx));
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+#endif
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+ matchN->setPlainText(match);
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+}
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+
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+void RegexExplorer::clearMatch()
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+{
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+ match0->clear();
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+ matchN->clear();
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+}
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+
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+bool RegexExplorer::stripEscapes(std::string& source)
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+{
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+ const char* in = source.c_str();
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+
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+ std::string result;
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+ result.reserve(source.size());
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+
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+ for(char inc = *in; inc != '\0'; inc = *++in)
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+ {
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+ if(inc == '\\')
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+ {
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+ char nextc = in[1];
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+ if(nextc == 't')
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+ {
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+ result.append(1, '\t');
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+ in++;
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+ }
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+ else if(nextc == 'n')
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+ {
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+ result.append(1, '\n');
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+ in++;
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+ }
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+ else if(nextc == 't')
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+ {
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+ result.append(1, '\t');
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+ in++;
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+ }
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+ else if(isalnum(nextc) || nextc == '\0')
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+ {
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+ return false;
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+ }
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+ else
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+ {
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+ result.append(1, nextc);
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+ in++;
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+ }
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+ }
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+ else
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+ {
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+ result.append(1, inc);
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+ }
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+ }
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+
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+ source = result;
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+ return true;
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+}
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Gregor Jasny