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12b55d76 KL |
1 | /* |
2 | * Jexer - Java Text User Interface | |
3 | * | |
4 | * The MIT License (MIT) | |
5 | * | |
a69ed767 | 6 | * Copyright (C) 2019 Kevin Lamonte |
12b55d76 KL |
7 | * |
8 | * Permission is hereby granted, free of charge, to any person obtaining a | |
9 | * copy of this software and associated documentation files (the "Software"), | |
10 | * to deal in the Software without restriction, including without limitation | |
11 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
12 | * and/or sell copies of the Software, and to permit persons to whom the | |
13 | * Software is furnished to do so, subject to the following conditions: | |
14 | * | |
15 | * The above copyright notice and this permission notice shall be included in | |
16 | * all copies or substantial portions of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
23 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
24 | * DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | * @author Kevin Lamonte [kevin.lamonte@gmail.com] | |
27 | * @version 1 | |
28 | */ | |
29 | package jexer; | |
30 | ||
71a389c9 KL |
31 | import java.io.IOException; |
32 | ||
12b55d76 | 33 | import jexer.bits.CellAttributes; |
43ee96da | 34 | import jexer.bits.StringUtils; |
101bc589 | 35 | import jexer.event.TCommandEvent; |
12b55d76 KL |
36 | import jexer.event.TKeypressEvent; |
37 | import jexer.event.TMouseEvent; | |
e8a11f98 | 38 | import jexer.event.TResizeEvent; |
12b55d76 KL |
39 | import jexer.teditor.Document; |
40 | import jexer.teditor.Line; | |
41 | import jexer.teditor.Word; | |
101bc589 | 42 | import static jexer.TCommand.*; |
12b55d76 KL |
43 | import static jexer.TKeypress.*; |
44 | ||
45 | /** | |
46 | * TEditorWidget displays an editable text document. It is unaware of | |
47 | * scrolling behavior, but can respond to mouse and keyboard events. | |
48 | */ | |
101bc589 | 49 | public class TEditorWidget extends TWidget implements EditMenuUser { |
12b55d76 | 50 | |
615a0d99 KL |
51 | // ------------------------------------------------------------------------ |
52 | // Constants -------------------------------------------------------------- | |
53 | // ------------------------------------------------------------------------ | |
54 | ||
b1a8acec KL |
55 | /** |
56 | * The number of lines to scroll on mouse wheel up/down. | |
57 | */ | |
58 | private static final int wheelScrollSize = 3; | |
59 | ||
615a0d99 KL |
60 | // ------------------------------------------------------------------------ |
61 | // Variables -------------------------------------------------------------- | |
62 | // ------------------------------------------------------------------------ | |
63 | ||
12b55d76 KL |
64 | /** |
65 | * The document being edited. | |
66 | */ | |
67 | private Document document; | |
68 | ||
e8a11f98 KL |
69 | /** |
70 | * The default color for the TEditor class. | |
71 | */ | |
72 | private CellAttributes defaultColor = null; | |
73 | ||
74 | /** | |
75 | * The topmost line number in the visible area. 0-based. | |
76 | */ | |
77 | private int topLine = 0; | |
78 | ||
79 | /** | |
80 | * The leftmost column number in the visible area. 0-based. | |
81 | */ | |
82 | private int leftColumn = 0; | |
83 | ||
101bc589 KL |
84 | /** |
85 | * If true, the mouse is dragging a selection. | |
86 | */ | |
87 | private boolean inSelection = false; | |
88 | ||
89 | /** | |
90 | * Selection starting column. | |
91 | */ | |
92 | private int selectionColumn0; | |
93 | ||
94 | /** | |
95 | * Selection starting line. | |
96 | */ | |
97 | private int selectionLine0; | |
98 | ||
99 | /** | |
100 | * Selection ending column. | |
101 | */ | |
102 | private int selectionColumn1; | |
103 | ||
104 | /** | |
105 | * Selection ending line. | |
106 | */ | |
107 | private int selectionLine1; | |
108 | ||
615a0d99 KL |
109 | // ------------------------------------------------------------------------ |
110 | // Constructors ----------------------------------------------------------- | |
111 | // ------------------------------------------------------------------------ | |
112 | ||
12b55d76 KL |
113 | /** |
114 | * Public constructor. | |
115 | * | |
116 | * @param parent parent widget | |
117 | * @param text text on the screen | |
118 | * @param x column relative to parent | |
119 | * @param y row relative to parent | |
120 | * @param width width of text area | |
121 | * @param height height of text area | |
122 | */ | |
123 | public TEditorWidget(final TWidget parent, final String text, final int x, | |
124 | final int y, final int width, final int height) { | |
125 | ||
126 | // Set parent and window | |
127 | super(parent, x, y, width, height); | |
128 | ||
129 | setCursorVisible(true); | |
e8a11f98 KL |
130 | |
131 | defaultColor = getTheme().getColor("teditor"); | |
132 | document = new Document(text, defaultColor); | |
12b55d76 KL |
133 | } |
134 | ||
615a0d99 | 135 | // ------------------------------------------------------------------------ |
101bc589 | 136 | // Event handlers --------------------------------------------------------- |
615a0d99 KL |
137 | // ------------------------------------------------------------------------ |
138 | ||
12b55d76 KL |
139 | /** |
140 | * Handle mouse press events. | |
141 | * | |
142 | * @param mouse mouse button press event | |
143 | */ | |
144 | @Override | |
145 | public void onMouseDown(final TMouseEvent mouse) { | |
146 | if (mouse.isMouseWheelUp()) { | |
b1a8acec KL |
147 | for (int i = 0; i < wheelScrollSize; i++) { |
148 | if (topLine > 0) { | |
149 | topLine--; | |
150 | alignDocument(false); | |
151 | } | |
e8a11f98 | 152 | } |
12b55d76 KL |
153 | return; |
154 | } | |
155 | if (mouse.isMouseWheelDown()) { | |
b1a8acec KL |
156 | for (int i = 0; i < wheelScrollSize; i++) { |
157 | if (topLine < document.getLineCount() - 1) { | |
158 | topLine++; | |
159 | alignDocument(true); | |
160 | } | |
e8a11f98 | 161 | } |
12b55d76 KL |
162 | return; |
163 | } | |
164 | ||
e8a11f98 | 165 | if (mouse.isMouse1()) { |
101bc589 | 166 | // Selection. |
20c416a0 KL |
167 | inSelection = true; |
168 | selectionColumn0 = leftColumn + mouse.getX(); | |
169 | selectionLine0 = topLine + mouse.getY(); | |
170 | selectionColumn1 = selectionColumn0; | |
171 | selectionLine1 = selectionLine0; | |
101bc589 KL |
172 | |
173 | // Set the row and column | |
174 | int newLine = topLine + mouse.getY(); | |
175 | int newX = leftColumn + mouse.getX(); | |
176 | if (newLine > document.getLineCount() - 1) { | |
177 | // Go to the end | |
178 | document.setLineNumber(document.getLineCount() - 1); | |
179 | document.end(); | |
180 | if (newLine > document.getLineCount() - 1) { | |
181 | setCursorY(document.getLineCount() - 1 - topLine); | |
182 | } else { | |
183 | setCursorY(mouse.getY()); | |
184 | } | |
185 | alignCursor(); | |
186 | if (inSelection) { | |
187 | selectionColumn1 = document.getCursor(); | |
188 | selectionLine1 = document.getLineNumber(); | |
101bc589 KL |
189 | } |
190 | return; | |
191 | } | |
192 | ||
193 | document.setLineNumber(newLine); | |
194 | setCursorY(mouse.getY()); | |
195 | if (newX >= document.getCurrentLine().getDisplayLength()) { | |
196 | document.end(); | |
197 | alignCursor(); | |
198 | } else { | |
199 | document.setCursor(newX); | |
200 | setCursorX(mouse.getX()); | |
201 | } | |
202 | if (inSelection) { | |
203 | selectionColumn1 = document.getCursor(); | |
204 | selectionLine1 = document.getLineNumber(); | |
101bc589 KL |
205 | } |
206 | return; | |
207 | } else { | |
208 | inSelection = false; | |
209 | } | |
210 | ||
211 | // Pass to children | |
212 | super.onMouseDown(mouse); | |
213 | } | |
214 | ||
215 | /** | |
216 | * Handle mouse motion events. | |
217 | * | |
218 | * @param mouse mouse motion event | |
219 | */ | |
220 | @Override | |
221 | public void onMouseMotion(final TMouseEvent mouse) { | |
222 | ||
223 | if (mouse.isMouse1()) { | |
224 | // Selection. | |
225 | if (inSelection) { | |
226 | selectionColumn1 = leftColumn + mouse.getX(); | |
227 | selectionLine1 = topLine + mouse.getY(); | |
20c416a0 | 228 | } else { |
101bc589 KL |
229 | inSelection = true; |
230 | selectionColumn0 = leftColumn + mouse.getX(); | |
231 | selectionLine0 = topLine + mouse.getY(); | |
232 | selectionColumn1 = selectionColumn0; | |
233 | selectionLine1 = selectionLine0; | |
101bc589 KL |
234 | } |
235 | ||
e8a11f98 KL |
236 | // Set the row and column |
237 | int newLine = topLine + mouse.getY(); | |
238 | int newX = leftColumn + mouse.getX(); | |
df602ccf | 239 | if (newLine > document.getLineCount() - 1) { |
e8a11f98 KL |
240 | // Go to the end |
241 | document.setLineNumber(document.getLineCount() - 1); | |
242 | document.end(); | |
df602ccf KL |
243 | if (newLine > document.getLineCount() - 1) { |
244 | setCursorY(document.getLineCount() - 1 - topLine); | |
e8a11f98 | 245 | } else { |
df602ccf | 246 | setCursorY(mouse.getY()); |
e8a11f98 KL |
247 | } |
248 | alignCursor(); | |
101bc589 KL |
249 | if (inSelection) { |
250 | selectionColumn1 = document.getCursor(); | |
251 | selectionLine1 = document.getLineNumber(); | |
101bc589 | 252 | } |
e8a11f98 KL |
253 | return; |
254 | } | |
255 | ||
256 | document.setLineNumber(newLine); | |
257 | setCursorY(mouse.getY()); | |
4297b49b | 258 | if (newX >= document.getCurrentLine().getDisplayLength()) { |
e8a11f98 KL |
259 | document.end(); |
260 | alignCursor(); | |
261 | } else { | |
df602ccf | 262 | document.setCursor(newX); |
e8a11f98 KL |
263 | setCursorX(mouse.getX()); |
264 | } | |
101bc589 KL |
265 | if (inSelection) { |
266 | selectionColumn1 = document.getCursor(); | |
267 | selectionLine1 = document.getLineNumber(); | |
101bc589 | 268 | } |
e8a11f98 KL |
269 | return; |
270 | } | |
12b55d76 KL |
271 | |
272 | // Pass to children | |
273 | super.onMouseDown(mouse); | |
274 | } | |
275 | ||
276 | /** | |
277 | * Handle keystrokes. | |
278 | * | |
279 | * @param keypress keystroke event | |
280 | */ | |
281 | @Override | |
282 | public void onKeypress(final TKeypressEvent keypress) { | |
43ee96da | 283 | if (keypress.getKey().isShift()) { |
101bc589 KL |
284 | // Selection. |
285 | if (!inSelection) { | |
286 | inSelection = true; | |
287 | selectionColumn0 = document.getCursor(); | |
288 | selectionLine0 = document.getLineNumber(); | |
289 | selectionColumn1 = selectionColumn0; | |
290 | selectionLine1 = selectionLine0; | |
101bc589 KL |
291 | } |
292 | } else { | |
43ee96da KL |
293 | if (keypress.equals(kbLeft) |
294 | || keypress.equals(kbRight) | |
295 | || keypress.equals(kbUp) | |
296 | || keypress.equals(kbDown) | |
297 | || keypress.equals(kbPgDn) | |
298 | || keypress.equals(kbPgUp) | |
299 | || keypress.equals(kbHome) | |
300 | || keypress.equals(kbEnd) | |
301 | ) { | |
302 | // Non-shifted navigation keys disable selection. | |
303 | inSelection = false; | |
304 | } | |
101bc589 KL |
305 | } |
306 | ||
307 | if (keypress.equals(kbLeft) | |
308 | || keypress.equals(kbShiftLeft) | |
309 | ) { | |
df602ccf KL |
310 | document.left(); |
311 | alignTopLine(false); | |
101bc589 KL |
312 | } else if (keypress.equals(kbRight) |
313 | || keypress.equals(kbShiftRight) | |
314 | ) { | |
df602ccf KL |
315 | document.right(); |
316 | alignTopLine(true); | |
e23989a4 KL |
317 | } else if (keypress.equals(kbAltLeft) |
318 | || keypress.equals(kbCtrlLeft) | |
43ee96da KL |
319 | || keypress.equals(kbAltShiftLeft) |
320 | || keypress.equals(kbCtrlShiftLeft) | |
e23989a4 KL |
321 | ) { |
322 | document.backwardsWord(); | |
323 | alignTopLine(false); | |
324 | } else if (keypress.equals(kbAltRight) | |
325 | || keypress.equals(kbCtrlRight) | |
43ee96da KL |
326 | || keypress.equals(kbAltShiftRight) |
327 | || keypress.equals(kbCtrlShiftRight) | |
e23989a4 KL |
328 | ) { |
329 | document.forwardsWord(); | |
330 | alignTopLine(true); | |
101bc589 KL |
331 | } else if (keypress.equals(kbUp) |
332 | || keypress.equals(kbShiftUp) | |
333 | ) { | |
71a389c9 KL |
334 | document.up(); |
335 | alignTopLine(false); | |
101bc589 KL |
336 | } else if (keypress.equals(kbDown) |
337 | || keypress.equals(kbShiftDown) | |
338 | ) { | |
71a389c9 KL |
339 | document.down(); |
340 | alignTopLine(true); | |
43ee96da KL |
341 | } else if (keypress.equals(kbPgUp) |
342 | || keypress.equals(kbShiftPgUp) | |
343 | ) { | |
71a389c9 KL |
344 | document.up(getHeight() - 1); |
345 | alignTopLine(false); | |
43ee96da KL |
346 | } else if (keypress.equals(kbPgDn) |
347 | || keypress.equals(kbShiftPgDn) | |
348 | ) { | |
71a389c9 KL |
349 | document.down(getHeight() - 1); |
350 | alignTopLine(true); | |
43ee96da KL |
351 | } else if (keypress.equals(kbHome) |
352 | || keypress.equals(kbShiftHome) | |
353 | ) { | |
e8a11f98 KL |
354 | if (document.home()) { |
355 | leftColumn = 0; | |
356 | if (leftColumn < 0) { | |
357 | leftColumn = 0; | |
358 | } | |
359 | setCursorX(0); | |
360 | } | |
43ee96da KL |
361 | } else if (keypress.equals(kbEnd) |
362 | || keypress.equals(kbShiftEnd) | |
363 | ) { | |
e8a11f98 KL |
364 | if (document.end()) { |
365 | alignCursor(); | |
366 | } | |
43ee96da KL |
367 | } else if (keypress.equals(kbCtrlHome) |
368 | || keypress.equals(kbCtrlShiftHome) | |
369 | ) { | |
12b55d76 KL |
370 | document.setLineNumber(0); |
371 | document.home(); | |
e8a11f98 KL |
372 | topLine = 0; |
373 | leftColumn = 0; | |
374 | setCursorX(0); | |
375 | setCursorY(0); | |
43ee96da KL |
376 | } else if (keypress.equals(kbCtrlEnd) |
377 | || keypress.equals(kbCtrlShiftEnd) | |
378 | ) { | |
12b55d76 KL |
379 | document.setLineNumber(document.getLineCount() - 1); |
380 | document.end(); | |
71a389c9 | 381 | alignTopLine(false); |
12b55d76 KL |
382 | } else if (keypress.equals(kbIns)) { |
383 | document.setOverwrite(!document.getOverwrite()); | |
384 | } else if (keypress.equals(kbDel)) { | |
43ee96da KL |
385 | if (inSelection) { |
386 | deleteSelection(); | |
387 | } else { | |
388 | document.del(); | |
389 | } | |
71a389c9 | 390 | alignCursor(); |
39e86397 KL |
391 | } else if (keypress.equals(kbBackspace) |
392 | || keypress.equals(kbBackspaceDel) | |
393 | ) { | |
43ee96da KL |
394 | if (inSelection) { |
395 | deleteSelection(); | |
396 | } else { | |
397 | document.backspace(); | |
398 | } | |
df602ccf KL |
399 | alignTopLine(false); |
400 | } else if (keypress.equals(kbTab)) { | |
43ee96da | 401 | deleteSelection(); |
101bc589 | 402 | // Add spaces until we hit modulo 8. |
df602ccf KL |
403 | for (int i = document.getCursor(); (i + 1) % 8 != 0; i++) { |
404 | document.addChar(' '); | |
405 | } | |
e8a11f98 | 406 | alignCursor(); |
71a389c9 | 407 | } else if (keypress.equals(kbEnter)) { |
43ee96da | 408 | deleteSelection(); |
df602ccf KL |
409 | document.enter(); |
410 | alignTopLine(true); | |
12b55d76 KL |
411 | } else if (!keypress.getKey().isFnKey() |
412 | && !keypress.getKey().isAlt() | |
413 | && !keypress.getKey().isCtrl() | |
414 | ) { | |
415 | // Plain old keystroke, process it | |
43ee96da | 416 | deleteSelection(); |
2d3f60d8 | 417 | document.addChar(keypress.getKey().getChar()); |
71a389c9 | 418 | alignCursor(); |
12b55d76 KL |
419 | } else { |
420 | // Pass other keys (tab etc.) on to TWidget | |
421 | super.onKeypress(keypress); | |
422 | } | |
101bc589 KL |
423 | |
424 | if (inSelection) { | |
425 | selectionColumn1 = document.getCursor(); | |
426 | selectionLine1 = document.getLineNumber(); | |
101bc589 | 427 | } |
12b55d76 KL |
428 | } |
429 | ||
e8a11f98 KL |
430 | /** |
431 | * Method that subclasses can override to handle window/screen resize | |
432 | * events. | |
433 | * | |
434 | * @param resize resize event | |
435 | */ | |
436 | @Override | |
437 | public void onResize(final TResizeEvent resize) { | |
438 | // Change my width/height, and pull the cursor in as needed. | |
439 | if (resize.getType() == TResizeEvent.Type.WIDGET) { | |
440 | setWidth(resize.getWidth()); | |
441 | setHeight(resize.getHeight()); | |
442 | // See if the cursor is now outside the window, and if so move | |
443 | // things. | |
444 | if (getCursorX() >= getWidth()) { | |
445 | leftColumn += getCursorX() - (getWidth() - 1); | |
446 | setCursorX(getWidth() - 1); | |
447 | } | |
448 | if (getCursorY() >= getHeight()) { | |
449 | topLine += getCursorY() - (getHeight() - 1); | |
450 | setCursorY(getHeight() - 1); | |
451 | } | |
452 | } else { | |
453 | // Let superclass handle it | |
454 | super.onResize(resize); | |
455 | } | |
456 | } | |
457 | ||
101bc589 KL |
458 | /** |
459 | * Handle posted command events. | |
460 | * | |
461 | * @param command command event | |
462 | */ | |
463 | @Override | |
464 | public void onCommand(final TCommandEvent command) { | |
465 | if (command.equals(cmCut)) { | |
466 | // Copy text to clipboard, and then remove it. | |
43ee96da | 467 | copySelection(); |
101bc589 KL |
468 | deleteSelection(); |
469 | return; | |
470 | } | |
471 | ||
472 | if (command.equals(cmCopy)) { | |
473 | // Copy text to clipboard. | |
43ee96da | 474 | copySelection(); |
101bc589 KL |
475 | return; |
476 | } | |
477 | ||
478 | if (command.equals(cmPaste)) { | |
479 | // Delete selected text, then paste text from clipboard. | |
480 | deleteSelection(); | |
481 | ||
482 | String text = getClipboard().pasteText(); | |
483 | if (text != null) { | |
484 | for (int i = 0; i < text.length(); ) { | |
485 | int ch = text.codePointAt(i); | |
486 | onKeypress(new TKeypressEvent(false, 0, ch, false, false, | |
487 | false)); | |
488 | i += Character.charCount(ch); | |
489 | } | |
490 | } | |
491 | return; | |
492 | } | |
493 | ||
494 | if (command.equals(cmClear)) { | |
495 | // Remove text. | |
496 | deleteSelection(); | |
497 | return; | |
498 | } | |
499 | ||
500 | } | |
501 | ||
502 | // ------------------------------------------------------------------------ | |
503 | // TWidget ---------------------------------------------------------------- | |
504 | // ------------------------------------------------------------------------ | |
505 | ||
506 | /** | |
507 | * Draw the text box. | |
508 | */ | |
509 | @Override | |
510 | public void draw() { | |
43ee96da KL |
511 | CellAttributes selectedColor = getTheme().getColor("teditor.selected"); |
512 | ||
513 | int startCol = selectionColumn0; | |
514 | int startRow = selectionLine0; | |
515 | int endCol = selectionColumn1; | |
516 | int endRow = selectionLine1; | |
517 | ||
518 | if (((selectionColumn1 < selectionColumn0) | |
519 | && (selectionLine1 <= selectionLine0)) | |
520 | || ((selectionColumn1 <= selectionColumn0) | |
521 | && (selectionLine1 < selectionLine0)) | |
522 | ) { | |
523 | // The user selected from bottom-right to top-left. Reverse the | |
524 | // coordinates for the inverted section. | |
525 | startCol = selectionColumn1; | |
526 | startRow = selectionLine1; | |
527 | endCol = selectionColumn0; | |
528 | endRow = selectionLine0; | |
529 | } | |
530 | ||
101bc589 KL |
531 | for (int i = 0; i < getHeight(); i++) { |
532 | // Background line | |
533 | getScreen().hLineXY(0, i, getWidth(), ' ', defaultColor); | |
534 | ||
535 | // Now draw document's line | |
536 | if (topLine + i < document.getLineCount()) { | |
537 | Line line = document.getLine(topLine + i); | |
538 | int x = 0; | |
539 | for (Word word: line.getWords()) { | |
540 | // For now, we are cheating: draw outside the left region | |
541 | // if needed and let screen do the clipping. | |
542 | getScreen().putStringXY(x - leftColumn, i, word.getText(), | |
543 | word.getColor()); | |
544 | x += word.getDisplayLength(); | |
545 | if (x - leftColumn > getWidth()) { | |
546 | break; | |
547 | } | |
548 | } | |
101bc589 | 549 | |
43ee96da KL |
550 | // Highlight selected region |
551 | if (inSelection) { | |
552 | if (startRow == endRow) { | |
553 | if (topLine + i == startRow) { | |
554 | for (x = startCol; x <= endCol; x++) { | |
555 | putAttrXY(x - leftColumn, i, selectedColor); | |
556 | } | |
557 | } | |
558 | } else { | |
559 | if (topLine + i == startRow) { | |
560 | for (x = startCol; x < line.getDisplayLength(); x++) { | |
561 | putAttrXY(x - leftColumn, i, selectedColor); | |
562 | } | |
563 | } else if (topLine + i == endRow) { | |
564 | for (x = 0; x <= endCol; x++) { | |
565 | putAttrXY(x - leftColumn, i, selectedColor); | |
566 | } | |
567 | } else if ((topLine + i >= startRow) | |
568 | && (topLine + i <= endRow) | |
569 | ) { | |
570 | for (x = 0; x < getWidth(); x++) { | |
571 | putAttrXY(x, i, selectedColor); | |
572 | } | |
573 | } | |
574 | } | |
575 | } | |
576 | ||
577 | } | |
101bc589 KL |
578 | } |
579 | } | |
580 | ||
615a0d99 KL |
581 | // ------------------------------------------------------------------------ |
582 | // TEditorWidget ---------------------------------------------------------- | |
583 | // ------------------------------------------------------------------------ | |
584 | ||
585 | /** | |
586 | * Align visible area with document current line. | |
587 | * | |
588 | * @param topLineIsTop if true, make the top visible line the document | |
589 | * current line if it was off-screen. If false, make the bottom visible | |
590 | * line the document current line. | |
591 | */ | |
592 | private void alignTopLine(final boolean topLineIsTop) { | |
593 | int line = document.getLineNumber(); | |
594 | ||
595 | if ((line < topLine) || (line > topLine + getHeight() - 1)) { | |
596 | // Need to move topLine to bring document back into view. | |
597 | if (topLineIsTop) { | |
598 | topLine = line - (getHeight() - 1); | |
599 | if (topLine < 0) { | |
600 | topLine = 0; | |
601 | } | |
602 | assert (topLine >= 0); | |
603 | } else { | |
604 | topLine = line; | |
605 | assert (topLine >= 0); | |
606 | } | |
607 | } | |
608 | ||
609 | /* | |
610 | System.err.println("line " + line + " topLine " + topLine); | |
611 | */ | |
612 | ||
613 | // Document is in view, let's set cursorY | |
614 | assert (line >= topLine); | |
615 | setCursorY(line - topLine); | |
616 | alignCursor(); | |
617 | } | |
618 | ||
619 | /** | |
620 | * Align document current line with visible area. | |
621 | * | |
622 | * @param topLineIsTop if true, make the top visible line the document | |
623 | * current line if it was off-screen. If false, make the bottom visible | |
624 | * line the document current line. | |
625 | */ | |
626 | private void alignDocument(final boolean topLineIsTop) { | |
627 | int line = document.getLineNumber(); | |
628 | int cursor = document.getCursor(); | |
629 | ||
630 | if ((line < topLine) || (line > topLine + getHeight() - 1)) { | |
631 | // Need to move document to ensure it fits view. | |
632 | if (topLineIsTop) { | |
633 | document.setLineNumber(topLine); | |
634 | } else { | |
635 | document.setLineNumber(topLine + (getHeight() - 1)); | |
636 | } | |
637 | if (cursor < document.getCurrentLine().getDisplayLength()) { | |
638 | document.setCursor(cursor); | |
639 | } | |
640 | } | |
641 | ||
642 | /* | |
643 | System.err.println("getLineNumber() " + document.getLineNumber() + | |
644 | " topLine " + topLine); | |
645 | */ | |
646 | ||
647 | // Document is in view, let's set cursorY | |
648 | setCursorY(document.getLineNumber() - topLine); | |
649 | alignCursor(); | |
650 | } | |
651 | ||
652 | /** | |
653 | * Align visible cursor with document cursor. | |
654 | */ | |
655 | private void alignCursor() { | |
656 | int width = getWidth(); | |
657 | ||
658 | int desiredX = document.getCursor() - leftColumn; | |
659 | if (desiredX < 0) { | |
660 | // We need to push the screen to the left. | |
661 | leftColumn = document.getCursor(); | |
662 | } else if (desiredX > width - 1) { | |
663 | // We need to push the screen to the right. | |
664 | leftColumn = document.getCursor() - (width - 1); | |
665 | } | |
666 | ||
667 | /* | |
668 | System.err.println("document cursor " + document.getCursor() + | |
669 | " leftColumn " + leftColumn); | |
670 | */ | |
671 | ||
672 | ||
673 | setCursorX(document.getCursor() - leftColumn); | |
674 | } | |
675 | ||
71a389c9 KL |
676 | /** |
677 | * Get the number of lines in the underlying Document. | |
678 | * | |
679 | * @return the number of lines | |
680 | */ | |
681 | public int getLineCount() { | |
682 | return document.getLineCount(); | |
683 | } | |
684 | ||
b6faeac0 KL |
685 | /** |
686 | * Get the current visible top row number. 1-based. | |
687 | * | |
688 | * @return the visible top row number. Row 1 is the first row. | |
689 | */ | |
690 | public int getVisibleRowNumber() { | |
691 | return topLine + 1; | |
692 | } | |
693 | ||
694 | /** | |
695 | * Set the current visible row number. 1-based. | |
696 | * | |
697 | * @param row the new visible row number. Row 1 is the first row. | |
698 | */ | |
699 | public void setVisibleRowNumber(final int row) { | |
700 | assert (row > 0); | |
701 | if ((row > 0) && (row < document.getLineCount())) { | |
702 | topLine = row - 1; | |
703 | alignDocument(true); | |
704 | } | |
705 | } | |
706 | ||
71a389c9 KL |
707 | /** |
708 | * Get the current editing row number. 1-based. | |
709 | * | |
710 | * @return the editing row number. Row 1 is the first row. | |
711 | */ | |
712 | public int getEditingRowNumber() { | |
713 | return document.getLineNumber() + 1; | |
714 | } | |
715 | ||
716 | /** | |
717 | * Set the current editing row number. 1-based. | |
718 | * | |
719 | * @param row the new editing row number. Row 1 is the first row. | |
720 | */ | |
721 | public void setEditingRowNumber(final int row) { | |
fe0770f9 KL |
722 | assert (row > 0); |
723 | if ((row > 0) && (row < document.getLineCount())) { | |
724 | document.setLineNumber(row - 1); | |
725 | alignTopLine(true); | |
726 | } | |
71a389c9 KL |
727 | } |
728 | ||
1bc08f18 KL |
729 | /** |
730 | * Set the current visible column number. 1-based. | |
731 | * | |
732 | * @return the visible column number. Column 1 is the first column. | |
733 | */ | |
734 | public int getVisibleColumnNumber() { | |
735 | return leftColumn + 1; | |
736 | } | |
737 | ||
738 | /** | |
739 | * Set the current visible column number. 1-based. | |
740 | * | |
741 | * @param column the new visible column number. Column 1 is the first | |
742 | * column. | |
743 | */ | |
744 | public void setVisibleColumnNumber(final int column) { | |
745 | assert (column > 0); | |
746 | if ((column > 0) && (column < document.getLineLengthMax())) { | |
747 | leftColumn = column - 1; | |
748 | alignDocument(true); | |
749 | } | |
750 | } | |
751 | ||
71a389c9 KL |
752 | /** |
753 | * Get the current editing column number. 1-based. | |
754 | * | |
755 | * @return the editing column number. Column 1 is the first column. | |
756 | */ | |
757 | public int getEditingColumnNumber() { | |
758 | return document.getCursor() + 1; | |
759 | } | |
760 | ||
761 | /** | |
762 | * Set the current editing column number. 1-based. | |
763 | * | |
764 | * @param column the new editing column number. Column 1 is the first | |
765 | * column. | |
766 | */ | |
767 | public void setEditingColumnNumber(final int column) { | |
fe0770f9 KL |
768 | if ((column > 0) && (column < document.getLineLength())) { |
769 | document.setCursor(column - 1); | |
770 | alignCursor(); | |
771 | } | |
71a389c9 KL |
772 | } |
773 | ||
774 | /** | |
775 | * Get the maximum possible row number. 1-based. | |
776 | * | |
777 | * @return the maximum row number. Row 1 is the first row. | |
778 | */ | |
779 | public int getMaximumRowNumber() { | |
780 | return document.getLineCount() + 1; | |
781 | } | |
782 | ||
783 | /** | |
784 | * Get the maximum possible column number. 1-based. | |
785 | * | |
786 | * @return the maximum column number. Column 1 is the first column. | |
787 | */ | |
788 | public int getMaximumColumnNumber() { | |
789 | return document.getLineLengthMax() + 1; | |
790 | } | |
791 | ||
792 | /** | |
793 | * Get the dirty value. | |
794 | * | |
795 | * @return true if the buffer is dirty | |
796 | */ | |
797 | public boolean isDirty() { | |
798 | return document.isDirty(); | |
799 | } | |
800 | ||
801 | /** | |
802 | * Save contents to file. | |
803 | * | |
804 | * @param filename file to save to | |
805 | * @throws IOException if a java.io operation throws | |
806 | */ | |
807 | public void saveToFilename(final String filename) throws IOException { | |
808 | document.saveToFilename(filename); | |
809 | } | |
810 | ||
101bc589 KL |
811 | /** |
812 | * Delete text within the selection bounds. | |
813 | */ | |
814 | private void deleteSelection() { | |
815 | if (inSelection == false) { | |
816 | return; | |
817 | } | |
43ee96da KL |
818 | inSelection = false; |
819 | ||
820 | int startCol = selectionColumn0; | |
821 | int startRow = selectionLine0; | |
822 | int endCol = selectionColumn1; | |
823 | int endRow = selectionLine1; | |
824 | ||
825 | if (((selectionColumn1 < selectionColumn0) | |
826 | && (selectionLine1 <= selectionLine0)) | |
827 | || ((selectionColumn1 <= selectionColumn0) | |
828 | && (selectionLine1 < selectionLine0)) | |
829 | ) { | |
830 | // The user selected from bottom-right to top-left. Reverse the | |
831 | // coordinates for the inverted section. | |
832 | startCol = selectionColumn1; | |
833 | startRow = selectionLine1; | |
834 | endCol = selectionColumn0; | |
835 | endRow = selectionLine0; | |
836 | } | |
837 | ||
838 | // Place the cursor on the selection end, and "press backspace" until | |
839 | // the cursor matches the selection start. | |
840 | document.setLineNumber(endRow); | |
841 | document.setCursor(endCol + 1); | |
842 | while (!((document.getLineNumber() == startRow) | |
843 | && (document.getCursor() == startCol)) | |
844 | ) { | |
845 | document.backspace(); | |
846 | } | |
847 | alignTopLine(true); | |
848 | } | |
849 | ||
850 | /** | |
851 | * Copy text within the selection bounds to clipboard. | |
852 | */ | |
853 | private void copySelection() { | |
854 | if (inSelection == false) { | |
855 | return; | |
856 | } | |
857 | ||
858 | int startCol = selectionColumn0; | |
859 | int startRow = selectionLine0; | |
860 | int endCol = selectionColumn1; | |
861 | int endRow = selectionLine1; | |
862 | ||
863 | if (((selectionColumn1 < selectionColumn0) | |
864 | && (selectionLine1 <= selectionLine0)) | |
865 | || ((selectionColumn1 <= selectionColumn0) | |
866 | && (selectionLine1 < selectionLine0)) | |
867 | ) { | |
868 | // The user selected from bottom-right to top-left. Reverse the | |
869 | // coordinates for the inverted section. | |
870 | startCol = selectionColumn1; | |
871 | startRow = selectionLine1; | |
872 | endCol = selectionColumn0; | |
873 | endRow = selectionLine0; | |
874 | } | |
875 | ||
876 | StringBuilder sb = new StringBuilder(); | |
877 | ||
878 | if (endRow > startRow) { | |
879 | // First line | |
880 | String line = document.getLine(startRow).getRawString(); | |
881 | int x = 0; | |
882 | for (int i = 0; i < line.length(); ) { | |
883 | int ch = line.codePointAt(i); | |
884 | ||
885 | if (x >= startCol) { | |
886 | sb.append(Character.toChars(ch)); | |
887 | } | |
888 | x += StringUtils.width(ch); | |
889 | i += Character.charCount(ch); | |
890 | } | |
891 | sb.append("\n"); | |
892 | ||
893 | // Middle lines | |
894 | for (int y = startRow + 1; y < endRow; y++) { | |
895 | sb.append(document.getLine(y).getRawString()); | |
896 | sb.append("\n"); | |
897 | } | |
898 | ||
899 | // Final line | |
900 | line = document.getLine(endRow).getRawString(); | |
901 | x = 0; | |
902 | for (int i = 0; i < line.length(); ) { | |
903 | int ch = line.codePointAt(i); | |
904 | ||
905 | if (x > endCol) { | |
906 | break; | |
907 | } | |
908 | ||
909 | sb.append(Character.toChars(ch)); | |
910 | x += StringUtils.width(ch); | |
911 | i += Character.charCount(ch); | |
912 | } | |
913 | } else { | |
914 | assert (startRow == endRow); | |
915 | ||
916 | // Only one line | |
917 | String line = document.getLine(startRow).getRawString(); | |
918 | int x = 0; | |
919 | for (int i = 0; i < line.length(); ) { | |
920 | int ch = line.codePointAt(i); | |
921 | ||
922 | if ((x >= startCol) && (x <= endCol)) { | |
923 | sb.append(Character.toChars(ch)); | |
924 | } | |
925 | ||
926 | x += StringUtils.width(ch); | |
927 | i += Character.charCount(ch); | |
928 | } | |
929 | } | |
101bc589 | 930 | |
43ee96da | 931 | getClipboard().copyText(sb.toString()); |
101bc589 KL |
932 | } |
933 | ||
934 | // ------------------------------------------------------------------------ | |
935 | // EditMenuUser ----------------------------------------------------------- | |
936 | // ------------------------------------------------------------------------ | |
937 | ||
938 | /** | |
939 | * Check if the cut menu item should be enabled. | |
940 | * | |
941 | * @return true if the cut menu item should be enabled | |
942 | */ | |
943 | public boolean isEditMenuCut() { | |
944 | return true; | |
945 | } | |
946 | ||
947 | /** | |
948 | * Check if the copy menu item should be enabled. | |
949 | * | |
950 | * @return true if the copy menu item should be enabled | |
951 | */ | |
952 | public boolean isEditMenuCopy() { | |
953 | return true; | |
954 | } | |
955 | ||
956 | /** | |
957 | * Check if the paste menu item should be enabled. | |
958 | * | |
959 | * @return true if the paste menu item should be enabled | |
960 | */ | |
961 | public boolean isEditMenuPaste() { | |
962 | return true; | |
963 | } | |
964 | ||
965 | /** | |
966 | * Check if the clear menu item should be enabled. | |
967 | * | |
968 | * @return true if the clear menu item should be enabled | |
969 | */ | |
970 | public boolean isEditMenuClear() { | |
971 | return true; | |
972 | } | |
973 | ||
12b55d76 | 974 | } |