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cc3e7291 NR |
1 | /* |
2 | * This file was taken from: | |
3 | * Jexer - Java Text User Interface | |
4 | * | |
5 | * The MIT License (MIT) | |
6 | * | |
7 | * Copyright (C) 2017 Kevin Lamonte | |
8 | * | |
9 | * Permission is hereby granted, free of charge, to any person obtaining a | |
10 | * copy of this software and associated documentation files (the "Software"), | |
11 | * to deal in the Software without restriction, including without limitation | |
12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
13 | * and/or sell copies of the Software, and to permit persons to whom the | |
14 | * Software is furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice shall be included in | |
17 | * all copies or substantial portions of the Software. | |
18 | * | |
19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
22 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
24 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
25 | * DEALINGS IN THE SOFTWARE. | |
26 | * | |
27 | * @author Kevin Lamonte [kevin.lamonte@gmail.com] | |
28 | * @version 1 | |
29 | */ | |
30 | package be.nikiroo.utils; | |
31 | ||
32 | import java.util.LinkedList; | |
33 | import java.util.List; | |
34 | ||
35 | /** | |
36 | * StringJustifier contains methods to convert one or more long lines of strings | |
37 | * into justified text paragraphs. | |
38 | */ | |
39 | class StringJustifier { | |
6a493e05 NR |
40 | /** |
41 | * Process the given text into a list of left-justified lines of a given | |
42 | * max-width. | |
43 | * | |
44 | * @param data | |
45 | * the text to justify | |
46 | * @param width | |
47 | * the maximum width of a line | |
48 | * | |
49 | * @return the list of justified lines | |
50 | */ | |
771c4ba4 NR |
51 | static List<String> left(final String data, final int width) { |
52 | List<String> lines = new LinkedList<String>(); | |
6a493e05 | 53 | |
771c4ba4 NR |
54 | for (String dataLine : data.split("\n")) { |
55 | String line = rightTrim(dataLine.replace("\t", " ")); | |
cc3e7291 | 56 | |
771c4ba4 NR |
57 | if (width > 0 && line.length() > width) { |
58 | while (line.length() > 0) { | |
59 | int i = Math.min(line.length(), width - 1); // -1 for "-" | |
cc3e7291 | 60 | |
771c4ba4 NR |
61 | boolean needDash = true; |
62 | // find the best space if any and if needed | |
63 | int prevSpace = 0; | |
64 | if (i < line.length()) { | |
65 | prevSpace = -1; | |
66 | int space = line.indexOf(' '); | |
cc3e7291 | 67 | |
771c4ba4 NR |
68 | while (space > -1 && space <= i) { |
69 | prevSpace = space; | |
70 | space = line.indexOf(' ', space + 1); | |
cc3e7291 | 71 | } |
771c4ba4 NR |
72 | |
73 | if (prevSpace > 0) { | |
74 | i = prevSpace; | |
75 | needDash = false; | |
76 | } | |
77 | } | |
78 | // | |
79 | ||
80 | // no dash before space/dash | |
81 | if ((i + 1) < line.length()) { | |
82 | char car = line.charAt(i); | |
83 | char nextCar = line.charAt(i + 1); | |
84 | if (nextCar == ' ' || car == '-' || nextCar == '-') { | |
85 | needDash = false; | |
cc3e7291 | 86 | } |
cc3e7291 | 87 | } |
771c4ba4 NR |
88 | |
89 | // if the space freed by the removed dash allows it, or if | |
90 | // it is the last char, add the next char | |
91 | if (!needDash || i >= line.length() - 1) { | |
92 | int checkI = Math.min(i + 1, line.length()); | |
93 | if (checkI == i || checkI <= width) { | |
94 | needDash = false; | |
95 | i = checkI; | |
96 | } | |
97 | } | |
98 | ||
99 | // no dash before parenthesis (but cannot add one more | |
100 | // after) | |
101 | if ((i + 1) < line.length()) { | |
102 | char car = line.charAt(i + 1); | |
103 | if (car == '(' || car == ')') { | |
104 | needDash = false; | |
105 | } | |
106 | } | |
107 | ||
108 | if (needDash) { | |
109 | lines.add(rightTrim(line.substring(0, i)) + "-"); | |
cc3e7291 | 110 | } else { |
771c4ba4 | 111 | lines.add(rightTrim(line.substring(0, i))); |
cc3e7291 | 112 | } |
cc3e7291 | 113 | |
771c4ba4 NR |
114 | // full trim (remove spaces when cutting) |
115 | line = line.substring(i).trim(); | |
116 | } | |
cc3e7291 | 117 | } else { |
771c4ba4 | 118 | lines.add(line); |
cc3e7291 | 119 | } |
771c4ba4 | 120 | } |
cc3e7291 | 121 | |
771c4ba4 | 122 | return lines; |
cc3e7291 NR |
123 | } |
124 | ||
125 | /** | |
126 | * Right-justify a string into a list of lines. | |
127 | * | |
128 | * @param str | |
129 | * the string | |
130 | * @param n | |
131 | * the maximum number of characters in a line | |
132 | * @return the list of lines | |
133 | */ | |
134 | static List<String> right(final String str, final int n) { | |
135 | List<String> result = new LinkedList<String>(); | |
136 | ||
137 | /* | |
138 | * Same as left(), but preceed each line with spaces to make it n chars | |
139 | * long. | |
140 | */ | |
141 | List<String> lines = left(str, n); | |
142 | for (String line : lines) { | |
143 | StringBuilder sb = new StringBuilder(); | |
144 | for (int i = 0; i < n - line.length(); i++) { | |
145 | sb.append(' '); | |
146 | } | |
147 | sb.append(line); | |
148 | result.add(sb.toString()); | |
149 | } | |
150 | ||
151 | return result; | |
152 | } | |
153 | ||
154 | /** | |
155 | * Center a string into a list of lines. | |
156 | * | |
157 | * @param str | |
158 | * the string | |
159 | * @param n | |
160 | * the maximum number of characters in a line | |
161 | * @return the list of lines | |
162 | */ | |
163 | static List<String> center(final String str, final int n) { | |
164 | List<String> result = new LinkedList<String>(); | |
165 | ||
166 | /* | |
167 | * Same as left(), but preceed/succeed each line with spaces to make it | |
168 | * n chars long. | |
169 | */ | |
170 | List<String> lines = left(str, n); | |
171 | for (String line : lines) { | |
172 | StringBuilder sb = new StringBuilder(); | |
173 | int l = (n - line.length()) / 2; | |
174 | int r = n - line.length() - l; | |
175 | for (int i = 0; i < l; i++) { | |
176 | sb.append(' '); | |
177 | } | |
178 | sb.append(line); | |
179 | for (int i = 0; i < r; i++) { | |
180 | sb.append(' '); | |
181 | } | |
182 | result.add(sb.toString()); | |
183 | } | |
184 | ||
185 | return result; | |
186 | } | |
187 | ||
188 | /** | |
189 | * Fully-justify a string into a list of lines. | |
190 | * | |
191 | * @param str | |
192 | * the string | |
193 | * @param n | |
194 | * the maximum number of characters in a line | |
195 | * @return the list of lines | |
196 | */ | |
197 | static List<String> full(final String str, final int n) { | |
198 | List<String> result = new LinkedList<String>(); | |
199 | ||
200 | /* | |
201 | * Same as left(), but insert spaces between words to make each line n | |
202 | * chars long. The "algorithm" here is pretty dumb: it performs a split | |
203 | * on space and then re-inserts multiples of n between words. | |
204 | */ | |
205 | List<String> lines = left(str, n); | |
206 | for (int lineI = 0; lineI < lines.size() - 1; lineI++) { | |
207 | String line = lines.get(lineI); | |
208 | String[] words = line.split(" "); | |
209 | if (words.length > 1) { | |
210 | int charCount = 0; | |
211 | for (int i = 0; i < words.length; i++) { | |
212 | charCount += words[i].length(); | |
213 | } | |
214 | int spaceCount = n - charCount; | |
215 | int q = spaceCount / (words.length - 1); | |
216 | int r = spaceCount % (words.length - 1); | |
217 | StringBuilder sb = new StringBuilder(); | |
218 | for (int i = 0; i < words.length - 1; i++) { | |
219 | sb.append(words[i]); | |
220 | for (int j = 0; j < q; j++) { | |
221 | sb.append(' '); | |
222 | } | |
223 | if (r > 0) { | |
224 | sb.append(' '); | |
225 | r--; | |
226 | } | |
227 | } | |
228 | for (int j = 0; j < r; j++) { | |
229 | sb.append(' '); | |
230 | } | |
231 | sb.append(words[words.length - 1]); | |
232 | result.add(sb.toString()); | |
233 | } else { | |
234 | result.add(line); | |
235 | } | |
236 | } | |
237 | if (lines.size() > 0) { | |
238 | result.add(lines.get(lines.size() - 1)); | |
239 | } | |
240 | ||
241 | return result; | |
242 | } | |
771c4ba4 NR |
243 | |
244 | /** | |
245 | * Trim the given {@link String} on the right only. | |
246 | * | |
247 | * @param data | |
248 | * the source {@link String} | |
249 | * @return the right-trimmed String or Empty if it was NULL | |
250 | */ | |
251 | static private String rightTrim(String data) { | |
252 | if (data == null) | |
253 | return ""; | |
254 | ||
255 | return ("|" + data).trim().substring(1); | |
256 | } | |
cc3e7291 | 257 | } |