mirror of https://github.com/octoleo/plantuml.git
103 lines
2.8 KiB
Java
103 lines
2.8 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* (C) Copyright 2009-2020, Arnaud Roques
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*
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* Project Info: http://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* http://plantuml.com/patreon (only 1$ per month!)
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* http://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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*
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* Original Author: Arnaud Roques
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*
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*
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*/
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package net.sourceforge.plantuml.utils;
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public class CharHidder {
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public static String addTileAtBegin(String s) {
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return "~" + s;
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}
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public static String hide(String s) {
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// System.err.println("hide " + s);
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final StringBuilder result = new StringBuilder();
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for (int i = 0; i < s.length(); i++) {
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final char c = s.charAt(i);
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if (c == '\\' && i + 1 < s.length() && s.charAt(i + 1) == '~') {
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result.append(hideChar('~'));
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i++;
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} else if (c == '~' && i + 1 < s.length()) {
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i++;
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final char c2 = s.charAt(i);
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if (isToBeHidden(c2)) {
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result.append(hideChar(c2));
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} else {
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result.append(c);
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result.append(c2);
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}
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} else {
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result.append(c);
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}
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}
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// System.err.println("---> " + result);
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return result.toString();
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}
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private static boolean isToBeHidden(final char c) {
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if (c == '_' || c == '-' || c == '\"' || c == '#' || c == ']' || c == '[' || c == '*' || c == '.' || c == '/'
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|| c == '<') {
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return true;
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}
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return false;
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}
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private static char hideChar(char c) {
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if (c > 255) {
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throw new IllegalArgumentException();
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}
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return (char) ('\uE000' + c);
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}
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private static char unhideChar(char c) {
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if (c >= '\uE000' && c <= '\uE0FF') {
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return (char) (c - '\uE000');
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}
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return c;
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}
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public static String unhide(String s) {
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final StringBuilder result = new StringBuilder();
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for (int i = 0; i < s.length(); i++) {
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final char c = s.charAt(i);
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result.append(unhideChar(c));
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}
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// System.err.println("unhide " + result);
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return result.toString();
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}
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}
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