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daa4106c | 1 | /* |
0d47c546 KL |
2 | * Jexer - Java Text User Interface |
3 | * | |
4 | * License: LGPLv3 or later | |
5 | * | |
6 | * This module is licensed under the GNU Lesser General Public License | |
7 | * Version 3. Please see the file "COPYING" in this directory for more | |
8 | * information about the GNU Lesser General Public License Version 3. | |
9 | * | |
10 | * Copyright (C) 2015 Kevin Lamonte | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU Lesser General Public License | |
14 | * as published by the Free Software Foundation; either version 3 of | |
15 | * the License, or (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU Lesser General Public | |
23 | * License along with this program; if not, see | |
24 | * http://www.gnu.org/licenses/, or write to the Free Software | |
25 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
26 | * 02110-1301 USA | |
27 | * | |
28 | * @author Kevin Lamonte [kevin.lamonte@gmail.com] | |
29 | * @version 1 | |
30 | */ | |
31 | package jexer; | |
32 | ||
33 | import java.io.File; | |
34 | import java.util.ArrayList; | |
35 | import java.util.List; | |
36 | ||
37 | import jexer.bits.CellAttributes; | |
38 | import jexer.event.TKeypressEvent; | |
39 | import jexer.event.TMouseEvent; | |
40 | import static jexer.TKeypress.*; | |
41 | ||
42 | /** | |
43 | * TDirectoryList shows the files within a directory. | |
44 | */ | |
a043164f | 45 | public final class TDirectoryList extends TWidget { |
0d47c546 KL |
46 | |
47 | /** | |
48 | * Files in the directory. | |
49 | */ | |
50 | private List<File> files; | |
51 | ||
52 | /** | |
53 | * Selected file. | |
54 | */ | |
55 | private int selectedFile = -1; | |
56 | ||
57 | /** | |
58 | * Root path containing files to display. | |
59 | */ | |
a043164f KL |
60 | private File path; |
61 | ||
62 | /** | |
63 | * Set the new path to display. | |
64 | * | |
65 | * @param path new path to list files for | |
66 | */ | |
67 | public void setPath(String path) { | |
68 | this.path = new File(path); | |
69 | reflow(); | |
70 | } | |
71 | ||
72 | /** | |
73 | * Get the path that is being displayed. | |
74 | * | |
75 | * @return the path | |
76 | */ | |
77 | public File getPath() { | |
78 | return path; | |
79 | } | |
0d47c546 KL |
80 | |
81 | /** | |
82 | * Vertical scrollbar. | |
83 | */ | |
84 | private TVScroller vScroller; | |
85 | ||
86 | /** | |
87 | * Horizontal scrollbar. | |
88 | */ | |
89 | private THScroller hScroller; | |
90 | ||
91 | /** | |
92 | * Maximum width of a single line. | |
93 | */ | |
94 | private int maxLineWidth; | |
95 | ||
96 | /** | |
97 | * The action to perform when the user selects an item. | |
98 | */ | |
99 | private TAction action = null; | |
100 | ||
101 | /** | |
102 | * Perform user selection action. | |
103 | */ | |
104 | public void dispatch() { | |
105 | assert (selectedFile >= 0); | |
106 | assert (selectedFile < files.size()); | |
107 | if (action != null) { | |
108 | action.DO(); | |
109 | } | |
110 | } | |
111 | ||
112 | /** | |
113 | * Format one of the entries for drawing on the screen. | |
114 | * | |
115 | * @param index index into files | |
116 | * @return the line to draw | |
117 | */ | |
118 | private String renderFile(int index) { | |
119 | File file = files.get(index); | |
120 | String name = file.getName(); | |
121 | if (name.length() > 20) { | |
122 | name = name.substring(0, 17) + "..."; | |
123 | } | |
124 | return String.format("%-20s %5dk", name, (file.length() / 1024)); | |
125 | } | |
126 | ||
127 | /** | |
128 | * Resize for a new width/height. | |
129 | */ | |
130 | public void reflow() { | |
131 | ||
132 | // Reset the lines | |
133 | selectedFile = -1; | |
134 | maxLineWidth = 0; | |
135 | files.clear(); | |
136 | ||
137 | // Build a list of files in this directory | |
138 | File [] newFiles = path.listFiles(); | |
a043164f KL |
139 | if (newFiles != null) { |
140 | for (int i = 0; i < newFiles.length; i++) { | |
141 | if (newFiles[i].getName().startsWith(".")) { | |
142 | continue; | |
143 | } | |
144 | if (newFiles[i].isDirectory()) { | |
145 | continue; | |
146 | } | |
147 | files.add(newFiles[i]); | |
0d47c546 | 148 | } |
0d47c546 KL |
149 | } |
150 | ||
151 | for (int i = 0; i < files.size(); i++) { | |
152 | String line = renderFile(i); | |
153 | if (line.length() > maxLineWidth) { | |
154 | maxLineWidth = line.length(); | |
155 | } | |
156 | } | |
157 | ||
158 | // Start at the top | |
159 | if (vScroller == null) { | |
160 | vScroller = new TVScroller(this, getWidth() - 1, 0, | |
161 | getHeight() - 1); | |
162 | } else { | |
163 | vScroller.setX(getWidth() - 1); | |
164 | vScroller.setHeight(getHeight() - 1); | |
165 | } | |
166 | vScroller.setBottomValue(files.size() - getHeight() - 1); | |
167 | vScroller.setTopValue(0); | |
168 | vScroller.setValue(0); | |
169 | if (vScroller.getBottomValue() < 0) { | |
170 | vScroller.setBottomValue(0); | |
171 | } | |
172 | vScroller.setBigChange(getHeight() - 1); | |
173 | ||
174 | // Start at the left | |
175 | if (hScroller == null) { | |
176 | hScroller = new THScroller(this, 0, getHeight() - 1, | |
177 | getWidth() - 1); | |
178 | } else { | |
179 | hScroller.setY(getHeight() - 1); | |
180 | hScroller.setWidth(getWidth() - 1); | |
181 | } | |
182 | hScroller.setRightValue(maxLineWidth - getWidth() + 1); | |
183 | hScroller.setLeftValue(0); | |
184 | hScroller.setValue(0); | |
185 | if (hScroller.getRightValue() < 0) { | |
186 | hScroller.setRightValue(0); | |
187 | } | |
188 | hScroller.setBigChange(getWidth() - 1); | |
189 | } | |
190 | ||
191 | /** | |
192 | * Public constructor. | |
193 | * | |
194 | * @param parent parent widget | |
195 | * @param path directory path, must be a directory | |
196 | * @param x column relative to parent | |
197 | * @param y row relative to parent | |
198 | * @param width width of text area | |
199 | * @param height height of text area | |
200 | */ | |
201 | public TDirectoryList(final TWidget parent, final String path, final int x, | |
202 | final int y, final int width, final int height) { | |
203 | ||
204 | this(parent, path, x, y, width, height, null); | |
205 | } | |
206 | ||
207 | /** | |
208 | * Public constructor. | |
209 | * | |
210 | * @param parent parent widget | |
211 | * @param path directory path, must be a directory | |
212 | * @param x column relative to parent | |
213 | * @param y row relative to parent | |
214 | * @param width width of text area | |
215 | * @param height height of text area | |
216 | * @param action action to perform when an item is selected | |
217 | */ | |
218 | public TDirectoryList(final TWidget parent, final String path, final int x, | |
219 | final int y, final int width, final int height, final TAction action) { | |
220 | ||
a043164f | 221 | super(parent, x, y, width, height); |
0d47c546 KL |
222 | this.path = new File(path); |
223 | this.action = action; | |
224 | files = new ArrayList<File>(); | |
225 | reflow(); | |
226 | } | |
227 | ||
228 | /** | |
229 | * Draw the files list. | |
230 | */ | |
231 | @Override | |
232 | public void draw() { | |
233 | CellAttributes color = null; | |
234 | int begin = vScroller.getValue(); | |
235 | int topY = 0; | |
a043164f | 236 | for (int i = begin; i < files.size(); i++) { |
0d47c546 KL |
237 | String line = renderFile(i); |
238 | if (hScroller.getValue() < line.length()) { | |
239 | line = line.substring(hScroller.getValue()); | |
240 | } else { | |
241 | line = ""; | |
242 | } | |
243 | if (i == selectedFile) { | |
244 | color = getTheme().getColor("tdirectorylist.selected"); | |
245 | } else if (isAbsoluteActive()) { | |
246 | color = getTheme().getColor("tdirectorylist"); | |
247 | } else { | |
248 | color = getTheme().getColor("tdirectorylist.inactive"); | |
249 | } | |
250 | String formatString = "%-" + Integer.toString(getWidth() - 1) + "s"; | |
251 | getScreen().putStringXY(0, topY, String.format(formatString, line), | |
252 | color); | |
253 | topY++; | |
254 | if (topY >= getHeight() - 1) { | |
255 | break; | |
256 | } | |
257 | } | |
258 | ||
a043164f KL |
259 | if (isAbsoluteActive()) { |
260 | color = getTheme().getColor("tdirectorylist"); | |
261 | } else { | |
262 | color = getTheme().getColor("tdirectorylist.inactive"); | |
263 | } | |
264 | ||
0d47c546 KL |
265 | // Pad the rest with blank lines |
266 | for (int i = topY; i < getHeight() - 1; i++) { | |
267 | getScreen().hLineXY(0, i, getWidth() - 1, ' ', color); | |
268 | } | |
269 | } | |
270 | ||
271 | /** | |
272 | * Handle mouse press events. | |
273 | * | |
274 | * @param mouse mouse button press event | |
275 | */ | |
276 | @Override | |
277 | public void onMouseDown(final TMouseEvent mouse) { | |
278 | if (mouse.isMouseWheelUp()) { | |
279 | vScroller.decrement(); | |
280 | return; | |
281 | } | |
282 | if (mouse.isMouseWheelDown()) { | |
283 | vScroller.increment(); | |
284 | return; | |
285 | } | |
286 | ||
287 | if ((mouse.getX() < getWidth() - 1) | |
288 | && (mouse.getY() < getHeight() - 1)) { | |
289 | if (vScroller.getValue() + mouse.getY() < files.size()) { | |
290 | selectedFile = vScroller.getValue() + mouse.getY(); | |
291 | } | |
292 | path = files.get(selectedFile); | |
293 | dispatch(); | |
294 | return; | |
295 | } | |
296 | ||
297 | // Pass to children | |
298 | super.onMouseDown(mouse); | |
299 | } | |
300 | ||
301 | /** | |
302 | * Handle mouse release events. | |
303 | * | |
304 | * @param mouse mouse button release event | |
305 | */ | |
306 | @Override | |
307 | public void onMouseUp(final TMouseEvent mouse) { | |
308 | // Pass to children | |
309 | super.onMouseDown(mouse); | |
310 | } | |
311 | ||
312 | /** | |
313 | * Handle keystrokes. | |
314 | * | |
315 | * @param keypress keystroke event | |
316 | */ | |
317 | @Override | |
318 | public void onKeypress(final TKeypressEvent keypress) { | |
319 | if (keypress.equals(kbLeft)) { | |
320 | hScroller.decrement(); | |
321 | } else if (keypress.equals(kbRight)) { | |
322 | hScroller.increment(); | |
323 | } else if (keypress.equals(kbUp)) { | |
a043164f KL |
324 | if (files.size() > 0) { |
325 | if (selectedFile >= 0) { | |
326 | if (selectedFile > 0) { | |
327 | selectedFile--; | |
328 | } | |
329 | } else { | |
330 | selectedFile = files.size() - 1; | |
331 | } | |
332 | path = files.get(selectedFile); | |
333 | } | |
0d47c546 | 334 | } else if (keypress.equals(kbDown)) { |
a043164f KL |
335 | if (files.size() > 0) { |
336 | if (selectedFile >= 0) { | |
337 | if (selectedFile < files.size() - 1) { | |
338 | selectedFile++; | |
339 | } | |
340 | } else { | |
341 | selectedFile = 0; | |
342 | } | |
343 | path = files.get(selectedFile); | |
344 | } | |
0d47c546 KL |
345 | } else if (keypress.equals(kbPgUp)) { |
346 | vScroller.bigDecrement(); | |
347 | } else if (keypress.equals(kbPgDn)) { | |
348 | vScroller.bigIncrement(); | |
349 | } else if (keypress.equals(kbHome)) { | |
350 | vScroller.toTop(); | |
a043164f KL |
351 | if (files.size() > 0) { |
352 | selectedFile = 0; | |
353 | path = files.get(selectedFile); | |
354 | } | |
0d47c546 KL |
355 | } else if (keypress.equals(kbEnd)) { |
356 | vScroller.toBottom(); | |
a043164f KL |
357 | if (files.size() > 0) { |
358 | selectedFile = files.size() - 1; | |
359 | path = files.get(selectedFile); | |
360 | } | |
361 | } else if (keypress.equals(kbTab)) { | |
362 | getParent().switchWidget(true); | |
363 | } else if (keypress.equals(kbShiftTab) || keypress.equals(kbBackTab)) { | |
364 | getParent().switchWidget(false); | |
365 | } else if (keypress.equals(kbEnter)) { | |
366 | if (selectedFile >= 0) { | |
367 | path = files.get(selectedFile); | |
368 | dispatch(); | |
369 | } | |
0d47c546 KL |
370 | } else { |
371 | // Pass other keys (tab etc.) on | |
372 | super.onKeypress(keypress); | |
373 | } | |
374 | } | |
375 | ||
376 | } |