1 files changed, 253 insertions, 0 deletions
diff --git a/kregexpeditor/emacsregexpconverter.cpp b/kregexpeditor/emacsregexpconverter.cpp
new file mode 100644
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--- /dev/null
+++ b/kregexpeditor/emacsregexpconverter.cpp
@@ -0,0 +1,253 @@
+/*
+ *  Copyright (c) 2002-2004 Jesper K. Pedersen <blackie@kde.org>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License version 2 as published by the Free Software Foundation.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ **/
+
+#include "emacsregexpconverter.h"
+#include "regexp.h"
+#include "altnregexp.h"
+#include "concregexp.h"
+#include "lookaheadregexp.h"
+#include "textrangeregexp.h"
+#include "textregexp.h"
+#include "compoundregexp.h"
+#include "dotregexp.h"
+#include "positionregexp.h"
+#include "repeatregexp.h"
+
+#include <kmessagebox.h>
+#include <klocale.h>
+bool EmacsRegExpConverter::canParse()
+{
+    return false;
+}
+
+QString EmacsRegExpConverter::toString( AltnRegExp* regexp, bool markSelection )
+{
+    QString res;
+
+	bool first = true;
+    RegExpList list = regexp->children();
+    for ( RegExpListIt it(list); *it; ++it ) {
+		if ( !first ) {
+			res += QString::fromLatin1("\\|");
+		}
+		first = false;
+        res += toStr( *it, markSelection );
+	}
+	return res;
+
+}
+
+QString EmacsRegExpConverter::toString( ConcRegExp* regexp, bool markSelection )
+{
+	QString res;
+
+    RegExpList list = regexp->children();
+	for ( RegExpListIt it(list); *it; ++it ) {
+        QString startPar = QString::fromLocal8Bit("");
+        QString endPar = QString::fromLocal8Bit("");
+        if ( (*it)->precedence() < regexp->precedence() ) {
+            startPar = QString::fromLatin1( "\\(" );
+            endPar = QString::fromLatin1( "\\)" );
+        }
+
+		res += startPar + toStr( *it, markSelection ) + endPar;
+	}
+
+	return res;
+
+}
+
+QString EmacsRegExpConverter::toString( LookAheadRegExp* /*regexp*/, bool /*markSelection*/ )
+{
+    static bool haveWarned = false;
+    if ( ! haveWarned ) {
+        KMessageBox::sorry( 0, i18n("Look ahead regular expressions not supported in Emacs style") );
+        haveWarned = true;
+    }
+
+    return QString::null;
+}
+
+QString EmacsRegExpConverter::toString( TextRangeRegExp* regexp, bool /*markSelection*/ )
+{
+	QString txt;
+
+	bool foundCarrot = false;
+	bool foundDash = false;
+	bool foundParenthesis = false;
+
+	// print the single characters, but keep "^" as the very
+	// last element of the characters.
+    QStringList chars = regexp->chars();
+	for (unsigned int i = 0; i< chars.count(); i++) {
+		if ( *chars.at(i) == QChar(']') ) {
+			foundParenthesis = true;
+		}
+		else if ( *chars.at(i) == QChar('-') ) {
+			foundDash = true;
+		}
+		else if ( *chars.at(i) == QChar('^') ) {
+			foundCarrot = true;
+		}
+		else {
+			txt.append( *chars.at(i) );
+		}
+	}
+
+	// Now insert the ranges.
+    QPtrList<StringPair> ranges = regexp->range();
+    for ( QPtrListIterator<StringPair> it(ranges); *it; ++it ) {
+		txt.append((*it)->first()+ QString::fromLatin1("-")+ (*it)->second());
+	}
+
+	// Ok, its time to build each part of the regexp, here comes the rule:
+	// if a ']' is one of the characters, then it must be the first one in the
+	// list (after then opening '[' and eventually negation '^')
+	// Next if a '-' is one of the characters, then it must come
+	// finally if '^' is one of the characters, then it must not be the first
+	// one!
+
+	QString res = QString::fromLatin1("[");
+
+	if ( regexp->negate() )
+		res.append(QString::fromLatin1("^"));
+
+
+	// a ']' must be the first character in teh range.
+	if ( foundParenthesis ) {
+		res.append(QString::fromLatin1("]"));
+	}
+
+	// a '-' must be the first character ( only coming after a ']')
+	if ( foundDash ) {
+		res.append(QString::fromLatin1("-"));
+	}
+
+	res += txt;
+
+	// Insert equivalents to \s,\S,\d,\D,\w, and \W
+    // non-digit, non-space, and non-word is not supported in Emacs style
+    if ( regexp->digit() )
+        res += QString::fromLocal8Bit("0-9");
+    if ( regexp->space() )
+        res += QString::fromLocal8Bit(" ") + QString( QChar( (char) 9 ) ); // Tab char
+    if ( regexp->wordChar() )
+        res += QString::fromLocal8Bit("a-zA-Z");
+
+	if ( foundCarrot ) {
+		res.append( QChar( '^' ) );
+	}
+
+	res.append(QString::fromLatin1("]"));
+
+	return res;
+}
+
+QString EmacsRegExpConverter::toString( CompoundRegExp* regexp, bool markSelection )
+{
+    return  toStr( regexp->child(), markSelection );
+}
+
+QString EmacsRegExpConverter::toString( DotRegExp* /*regexp*/, bool /*markSelection*/ )
+{
+    return QString::fromLatin1( "." );
+}
+
+QString EmacsRegExpConverter::toString( PositionRegExp* regexp, bool /*markSelection*/ )
+{
+    static bool haveWarned = false;
+    switch ( regexp->position()) {
+	case PositionRegExp::BEGLINE:
+		return QString::fromLatin1("^");
+	case PositionRegExp::ENDLINE:
+		return QString::fromLatin1("$");
+	case PositionRegExp::WORDBOUNDARY:
+    case PositionRegExp::NONWORDBOUNDARY:
+        if ( ! haveWarned ) {
+            KMessageBox::sorry( 0, i18n( "Word boundary and non word boundary is not supported in Emacs syntax" ) );
+            haveWarned = true;
+            return QString::fromLatin1("");
+        }
+    }
+    return QString::fromLatin1("");
+}
+
+QString EmacsRegExpConverter::toString( RepeatRegExp* regexp, bool markSelection )
+{
+    RegExp* child = regexp->child();
+    QString cText = toStr( child, markSelection );
+    QString startPar;
+    QString endPar;
+
+    if ( child->precedence() < regexp->precedence() ) {
+        startPar = QString::fromLatin1( "\\(" );
+        endPar = QString::fromLatin1( "\\)" );
+    }
+
+    if (regexp->min() == 0 && regexp->max() == -1) {
+        return startPar + cText +endPar + QString::fromLocal8Bit("*");
+    }
+    else if ( regexp->min() == 0 && regexp->max() == 1 ) {
+        return startPar + cText + endPar + QString::fromLocal8Bit("?");
+    }
+    else if ( regexp->min() == 1 && regexp->max() == -1 ) {
+        return startPar + cText + endPar + QString::fromLocal8Bit("+");
+    }
+    else {
+        QString res = QString::fromLatin1("");
+        for ( int i = 0; i < regexp->min(); ++i ) {
+            res += QString::fromLatin1( "\\(" ) + cText + QString::fromLatin1( "\\)" );
+        }
+        if ( regexp->max() != -1 ) {
+            for ( int i = regexp->min(); i < regexp->max(); ++i ) {
+                res += QString::fromLatin1("\\(") + cText + QString::fromLatin1("\\)?");
+            }
+        }
+        else
+            res += QString::fromLatin1("+");
+
+        return res;
+    }
+}
+
+QString EmacsRegExpConverter::toString( TextRegExp* regexp, bool /*markSelection*/ )
+{
+    QValueList<QChar> list;
+    list << QChar('$')
+         << QChar('^')
+         << QChar('.')
+         << QChar('*')
+         << QChar('+')
+         << QChar('?')
+         << QChar('[')
+         << QChar(']')
+         << QChar('\\');
+
+	QString res = escape( regexp->text(), list, QChar('\\') );
+	return res;
+}
+
+QString EmacsRegExpConverter::name()
+{
+    return QString::fromLatin1( "Emacs" );
+}
+
+int EmacsRegExpConverter::features()
+{
+    return WordStart | WordEnd;
+}