StartUtils.java
/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* (C) Copyright 2009-2024, Arnaud Roques
*
* Project Info: https://plantuml.com
*
* If you like this project or if you find it useful, you can support us at:
*
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*
* 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.utils;
import net.sourceforge.plantuml.StringUtils;
import net.sourceforge.plantuml.core.DiagramType;
import net.sourceforge.plantuml.regex.Matcher2;
import net.sourceforge.plantuml.regex.Pattern2;
import net.sourceforge.plantuml.text.StringLocated;
public class StartUtils {
// ::remove file when __HAXE__
public static final Pattern2 patternFilename = Pattern2
.cmpile("^[@\\\\]start[^%s{}%g]+[%s{][%s%g]*([^%g]*?)[%s}%g]*$");
public static final String PAUSE_PATTERN = "((?:\\W|\\<[^<>]*\\>)*)[@\\\\]unpause";
public static final String START_PATTERN = "((?:[^\\w~]|\\<[^<>]*\\>)*)[@\\\\]start";
public static String beforeStartUml(final String s) {
boolean inside = false;
for (int i = 0; i < s.length(); i++) {
final String tmp = s.substring(i, s.length());
if (startsWithSymbolAnd("start", tmp))
return s.substring(0, i);
final String single = s.substring(i, i + 1);
if (inside) {
if (single.equals(">"))
inside = false;
continue;
}
if (single.equals("<"))
inside = true;
else if (single.matches("[\\w~]"))
return null;
}
return null;
}
public static boolean isArobaseStartDiagram(String s) {
return DiagramType.getTypeFromArobaseStart(s) != DiagramType.UNKNOWN;
}
private static boolean startsWithSymbolAnd(String keyword, String text) {
for (int i = 0; i < text.length(); i++) {
final char c = text.charAt(i);
if (Character.isWhitespace(c))
continue;
if (c != '@' && c != '\\')
return false;
if (text.length() - i - 1 < keyword.length())
return false;
return text.regionMatches(i + 1, keyword, 0, keyword.length());
}
return false;
}
public static boolean isArobaseEndDiagram(String s) {
return startsWithSymbolAnd("end", s);
}
public static boolean isArobasePauseDiagram(String s) {
return startsWithSymbolAnd("pause", s);
}
public static boolean isArobaseUnpauseDiagram(String s) {
return startsWithSymbolAnd("unpause", s);
}
public static boolean isExit(CharSequence s) {
final int len = s.length();
int start = 0;
int end = len - 1;
while (start < len && Character.isWhitespace(s.charAt(start)))
start++;
while (end >= start && Character.isWhitespace(s.charAt(end)))
end--;
if (end - start + 1 != 5)
return false;
return s.charAt(start) == '!' && //
s.charAt(start + 1) == 'e' && //
s.charAt(start + 2) == 'x' && //
s.charAt(start + 3) == 'i' && //
s.charAt(start + 4) == 't';
}
private static final Pattern2 append = Pattern2.cmpile("^\\W*[@\\\\](append|a)\\b");
public static StringLocated getPossibleAppend(StringLocated cs) {
final String s = cs.getString();
final Matcher2 m = append.matcher(s);
if (m.find()) {
final String tmp = s.substring(m.group(0).length(), s.length());
return new StringLocated(StringUtils.trin(tmp), cs.getLocation(), cs.getPreprocessorError());
}
return null;
}
}