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- /***************************************************************************
- linewrapper.cpp - description
- -------------------
- begin : Sa Jan 00 2004
- copyright : (C) 2004 by Andre Simon
- email : andre.simon1@gmx.de
- ***************************************************************************/
-
- /***************************************************************************
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- ***************************************************************************/
-
- #include "linewrapper.h"
-
- namespace highlight {
-
- LineWrapper::LineWrapper(unsigned int maxlength, bool indentAfterOpenBraces):
- MAX_LINE_LENGTH(maxlength-1),
- index(0),
- wsPrefixLength(string::npos),
- hasMore(false),
- indentAfterOpenBraces(indentAfterOpenBraces),
- redefineWsPrefix(false)
- {
- }
-
- LineWrapper::LineWrapper():
- MAX_LINE_LENGTH(80),
- index(0),
- wsPrefixLength(string::npos),
- hasMore(false),
- indentAfterOpenBraces(true),
- redefineWsPrefix(false)
- {
- }
-
- LineWrapper::~LineWrapper()
- {
- }
-
- bool LineWrapper::hasMoreLines(){
- return hasMore;
- }
-
- bool LineWrapper::indentCode(){
- return indentAfterOpenBraces;
- }
-
- void LineWrapper::setLine(const std::string newLine){
- line=newLine;
- wsPrefix="";
- index=0;
- wsPrefixLength=string::npos;
- hasMore=true;
- redefineWsPrefix=false;
- }
-
- std::string LineWrapper::getNextLine(){
-
- if (!index && line.length() > MAX_LINE_LENGTH){ // erster Durchlauf...
- // wenn mglich an ffnender Klammer oder Geichheitszeichen ausrichten
- if (indentAfterOpenBraces){
- wsPrefixLength=line.find_first_of("{(=");
- }
- // sonst die Einrckung der Originalzeile beibehalten
- if (wsPrefixLength==string::npos || wsPrefixLength-index>MAX_LINE_LENGTH){
- wsPrefixLength=line.find_first_not_of(WS_CHARS);
- }
- else {
- // wsPrefix in allen neu umgebrochenen Zeilen durch Spaces ersetzen
- redefineWsPrefix=true;
- // Position hinter ffnende Klammer springen
- wsPrefixLength=line.find_first_not_of(WS_CHARS,wsPrefixLength+1);
- }
-
- if (wsPrefixLength!=string::npos){
- index = wsPrefixLength;
- // Falls Anzahl der Whitespaces am beginn der ersten zeile gr�r
- // als Max. Zeilenl�ge, Whitespaces verwerfen
- if (wsPrefixLength>MAX_LINE_LENGTH){
- wsPrefixLength=0;
- return string();
- }
- else{
- wsPrefix=line.substr(0, wsPrefixLength);
- }
- }
- // Zeile enthaelt nur Whitespace; verwerfen
- else {
- hasMore= false;
- return string();
- }
- } else {
- if (redefineWsPrefix){
- wsPrefix="";
- for (unsigned int i=0;i<wsPrefixLength;i++)
- wsPrefix += " ";
- }
- redefineWsPrefix=false;
- }
-
- string resultString;
-
- // Position, ab der rckwaerts nach Umbruchmglichkeit gesucht wird
- unsigned int searchEndPos=MAX_LINE_LENGTH-wsPrefixLength;
-
- // letztes Teilstueck der Zeile ausgeben; Parsen beenden
- if (line.length()-index < searchEndPos) {
- hasMore=false;
- resultString=(index>0)?wsPrefix + line.substr(index): line.substr(index);
- return resultString;
- }
-
- // Umbrechposition suchen
- unsigned int lbPos = line.find_last_of(LB_CHARS, index+searchEndPos);
- if (lbPos <= index || lbPos == string::npos) {
- // nichts gefunden, hart umbrechen
- lbPos = index + searchEndPos;
- }
- // Einrckung der Originalzeile erhalten
- resultString+=wsPrefix;
- // Neue Zeile erzeugen
- resultString += line.substr(index, lbPos-index+1);
-
- // Whitespace am neuen Zeilenbeginn ignorieren, ausser beim ersten Durchlauf
- //unsigned int newIndex=StringTools::getNextNonWsPos(line,lbPos+1);
- unsigned int newIndex=line.find_first_not_of(WS_CHARS, lbPos+1);
- index=(newIndex!=string::npos)?newIndex:line.length();
-
- hasMore=index!=line.length(); // unnoetigen Leerstring vermeiden
-
- return resultString;
- }
-
- }
-