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/*
* 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;
}
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