plantuml/src/net/sourceforge/plantuml/preproc/UncommentReadLine.java

93 lines
2.7 KiB
Java

/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* (C) Copyright 2009-2020, Arnaud Roques
*
* Project Info: http://plantuml.com
*
* If you like this project or if you find it useful, you can support us at:
*
* http://plantuml.com/patreon (only 1$ per month!)
* http://plantuml.com/paypal
*
* This file is part of PlantUML.
*
* PlantUML 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 3 of the License, or
* (at your option) any later version.
*
* PlantUML 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 General Public
* License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
*
* Original Author: Arnaud Roques
*
*
*/
package net.sourceforge.plantuml.preproc;
import java.io.IOException;
import net.sourceforge.plantuml.StringLocated;
import net.sourceforge.plantuml.command.regex.Matcher2;
import net.sourceforge.plantuml.command.regex.MyPattern;
import net.sourceforge.plantuml.command.regex.Pattern2;
import net.sourceforge.plantuml.utils.StartUtils;
public class UncommentReadLine implements ReadLine {
private static final Pattern2 unpause = MyPattern.cmpile(StartUtils.PAUSE_PATTERN);
private final ReadLine raw;
private String headerToRemove;
private boolean paused;
public UncommentReadLine(ReadLine source) {
this.raw = source;
}
public StringLocated readLine() throws IOException {
final StringLocated result = raw.readLine();
if (result == null) {
return null;
}
final String tmp = StartUtils.beforeStartUml(result.getString());
if (tmp != null) {
headerToRemove = tmp;
}
if (paused) {
final Matcher2 m2 = unpause.matcher(result.getString());
if (m2.find()) {
headerToRemove = m2.group(1);
}
}
if (headerToRemove != null && headerToRemove.startsWith(result.getString())) {
return new StringLocated("", result.getLocation());
}
if (headerToRemove != null && result.getString().startsWith(headerToRemove)) {
return result.sub(headerToRemove.length(), result.getString().length());
}
return result;
}
public void close() throws IOException {
this.raw.close();
}
public void setPaused(boolean paused) {
this.paused = paused;
}
}