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/* ========================================================================
* 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;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
public class BackSlash {
private static final char PRIVATE_BLOCK = '\uE000';
public static final String BS_BS_N = "\\n";
public static final String NEWLINE = "\n";
public static final char CHAR_NEWLINE = '\n';
public static char hiddenNewLine() {
return PRIVATE_BLOCK + BackSlash.CHAR_NEWLINE;
}
public static String convertHiddenNewLine(String s) {
s = s.replaceAll("(?<!\\\\)\\\\n", "" + hiddenNewLine());
s = s.replaceAll("\\\\\\\\n", "\\\\n");
return s;
}
public static List<String> splitHiddenNewLine(String s) {
return Arrays.asList(s.split("" + hiddenNewLine()));
}
public static String manageNewLine(String string) {
return string.replace(hiddenNewLine(), BackSlash.CHAR_NEWLINE);
}
public static List<String> getWithNewlines(CharSequence s) {
if (s == null) {
return null;
}
final List<String> result = new ArrayList<String>();
final StringBuilder current = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
final char c = s.charAt(i);
if (c == '\\' && i < s.length() - 1) {
final char c2 = s.charAt(i + 1);
i++;
if (c2 == 'n') {
result.add(current.toString());
current.setLength(0);
} else if (c2 == 't') {
current.append('\t');
} else if (c2 == '\\') {
current.append(c2);
}
} else {
current.append(c);
}
}
result.add(current.toString());
return Collections.unmodifiableList(result);
}
public static String translateBackSlashes(CharSequence s) {
if (s == null) {
return null;
}
// final String tmps = s.toString();
// if (tmps.indexOf('\\') == -1) {
// return tmps;
// }
final StringBuilder result = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
final char c = s.charAt(i);
if (c == '\\' && i < s.length() - 1 && isEnglishLetterOfBackSlash(s.charAt(i + 1))) {
result.append('\\');
result.append(translateChar(s.charAt(i + 1)));
i++;
} else {
result.append(c);
}
}
return result.toString();
}
private static boolean isEnglishLetterOfBackSlash(char c) {
return c == 'n';
// return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
}
public static String untranslateBackSlashes(CharSequence s) {
if (s == null) {
return null;
}
final StringBuilder result = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if (c > PRIVATE_BLOCK && c < '\uE07F') {
c = (char) (c - PRIVATE_BLOCK);
}
result.append(c);
}
return result.toString();
}
private static char translateChar(char c) {
if (c > 128) {
throw new IllegalArgumentException();
}
return (char) (PRIVATE_BLOCK + c);
}
}
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