| 1 | /* |
| 2 | * Jexer - Java Text User Interface |
| 3 | * |
| 4 | * The MIT License (MIT) |
| 5 | * |
| 6 | * Copyright (C) 2019 Kevin Lamonte |
| 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 | |
| 31 | import java.io.IOException; |
| 32 | import java.util.ArrayList; |
| 33 | import java.util.List; |
| 34 | |
| 35 | import jexer.bits.CellAttributes; |
| 36 | import jexer.bits.StringUtils; |
| 37 | import jexer.event.TCommandEvent; |
| 38 | import jexer.event.TKeypressEvent; |
| 39 | import jexer.event.TMouseEvent; |
| 40 | import jexer.event.TResizeEvent; |
| 41 | import jexer.teditor.Document; |
| 42 | import jexer.teditor.Line; |
| 43 | import jexer.teditor.Word; |
| 44 | import static jexer.TCommand.*; |
| 45 | import static jexer.TKeypress.*; |
| 46 | |
| 47 | /** |
| 48 | * TEditorWidget displays an editable text document. It is unaware of |
| 49 | * scrolling behavior, but can respond to mouse and keyboard events. |
| 50 | */ |
| 51 | public class TEditorWidget extends TWidget implements EditMenuUser { |
| 52 | |
| 53 | // ------------------------------------------------------------------------ |
| 54 | // Constants -------------------------------------------------------------- |
| 55 | // ------------------------------------------------------------------------ |
| 56 | |
| 57 | /** |
| 58 | * The number of lines to scroll on mouse wheel up/down. |
| 59 | */ |
| 60 | private static final int wheelScrollSize = 3; |
| 61 | |
| 62 | // ------------------------------------------------------------------------ |
| 63 | // Variables -------------------------------------------------------------- |
| 64 | // ------------------------------------------------------------------------ |
| 65 | |
| 66 | /** |
| 67 | * The document being edited. |
| 68 | */ |
| 69 | protected Document document; |
| 70 | |
| 71 | /** |
| 72 | * The default color for the editable text. |
| 73 | */ |
| 74 | private CellAttributes defaultColor = null; |
| 75 | |
| 76 | /** |
| 77 | * The topmost line number in the visible area. 0-based. |
| 78 | */ |
| 79 | private int topLine = 0; |
| 80 | |
| 81 | /** |
| 82 | * The leftmost column number in the visible area. 0-based. |
| 83 | */ |
| 84 | private int leftColumn = 0; |
| 85 | |
| 86 | /** |
| 87 | * If true, the mouse is dragging a selection. |
| 88 | */ |
| 89 | private boolean inSelection = false; |
| 90 | |
| 91 | /** |
| 92 | * Selection starting column. |
| 93 | */ |
| 94 | private int selectionColumn0; |
| 95 | |
| 96 | /** |
| 97 | * Selection starting line. |
| 98 | */ |
| 99 | private int selectionLine0; |
| 100 | |
| 101 | /** |
| 102 | * Selection ending column. |
| 103 | */ |
| 104 | private int selectionColumn1; |
| 105 | |
| 106 | /** |
| 107 | * Selection ending line. |
| 108 | */ |
| 109 | private int selectionLine1; |
| 110 | |
| 111 | /** |
| 112 | * The list of undo/redo states. |
| 113 | */ |
| 114 | private List<SavedState> undoList = new ArrayList<SavedState>(); |
| 115 | |
| 116 | /** |
| 117 | * The position in undoList for undo/redo. |
| 118 | */ |
| 119 | private int undoListI = 0; |
| 120 | |
| 121 | /** |
| 122 | * The maximum size of the undo list. |
| 123 | */ |
| 124 | private int undoLevel = 50; |
| 125 | |
| 126 | /** |
| 127 | * The saved state for an undo/redo operation. |
| 128 | */ |
| 129 | private class SavedState { |
| 130 | /** |
| 131 | * The Document state. |
| 132 | */ |
| 133 | public Document document; |
| 134 | |
| 135 | /** |
| 136 | * The topmost line number in the visible area. 0-based. |
| 137 | */ |
| 138 | public int topLine = 0; |
| 139 | |
| 140 | /** |
| 141 | * The leftmost column number in the visible area. 0-based. |
| 142 | */ |
| 143 | public int leftColumn = 0; |
| 144 | |
| 145 | } |
| 146 | |
| 147 | // ------------------------------------------------------------------------ |
| 148 | // Constructors ----------------------------------------------------------- |
| 149 | // ------------------------------------------------------------------------ |
| 150 | |
| 151 | /** |
| 152 | * Public constructor. |
| 153 | * |
| 154 | * @param parent parent widget |
| 155 | * @param text text on the screen |
| 156 | * @param x column relative to parent |
| 157 | * @param y row relative to parent |
| 158 | * @param width width of text area |
| 159 | * @param height height of text area |
| 160 | */ |
| 161 | public TEditorWidget(final TWidget parent, final String text, final int x, |
| 162 | final int y, final int width, final int height) { |
| 163 | |
| 164 | // Set parent and window |
| 165 | super(parent, x, y, width, height); |
| 166 | |
| 167 | setCursorVisible(true); |
| 168 | |
| 169 | defaultColor = getTheme().getColor("teditor"); |
| 170 | document = new Document(text, defaultColor); |
| 171 | } |
| 172 | |
| 173 | // ------------------------------------------------------------------------ |
| 174 | // Event handlers --------------------------------------------------------- |
| 175 | // ------------------------------------------------------------------------ |
| 176 | |
| 177 | /** |
| 178 | * Handle mouse press events. |
| 179 | * |
| 180 | * @param mouse mouse button press event |
| 181 | */ |
| 182 | @Override |
| 183 | public void onMouseDown(final TMouseEvent mouse) { |
| 184 | if (mouse.isMouseWheelUp()) { |
| 185 | for (int i = 0; i < wheelScrollSize; i++) { |
| 186 | if (topLine > 0) { |
| 187 | topLine--; |
| 188 | alignDocument(false); |
| 189 | } |
| 190 | } |
| 191 | return; |
| 192 | } |
| 193 | if (mouse.isMouseWheelDown()) { |
| 194 | for (int i = 0; i < wheelScrollSize; i++) { |
| 195 | if (topLine < document.getLineCount() - 1) { |
| 196 | topLine++; |
| 197 | alignDocument(true); |
| 198 | } |
| 199 | } |
| 200 | return; |
| 201 | } |
| 202 | |
| 203 | if (mouse.isMouse1()) { |
| 204 | // Selection. |
| 205 | int newLine = topLine + mouse.getY(); |
| 206 | int newX = leftColumn + mouse.getX(); |
| 207 | |
| 208 | inSelection = true; |
| 209 | if (newLine > document.getLineCount() - 1) { |
| 210 | selectionLine0 = document.getLineCount() - 1; |
| 211 | } else { |
| 212 | selectionLine0 = topLine + mouse.getY(); |
| 213 | } |
| 214 | selectionColumn0 = leftColumn + mouse.getX(); |
| 215 | selectionColumn0 = Math.max(0, Math.min(selectionColumn0, |
| 216 | document.getLine(selectionLine0).getDisplayLength() - 1)); |
| 217 | selectionColumn1 = selectionColumn0; |
| 218 | selectionLine1 = selectionLine0; |
| 219 | |
| 220 | // Set the row and column |
| 221 | if (newLine > document.getLineCount() - 1) { |
| 222 | // Go to the end |
| 223 | document.setLineNumber(document.getLineCount() - 1); |
| 224 | document.end(); |
| 225 | if (newLine > document.getLineCount() - 1) { |
| 226 | setCursorY(document.getLineCount() - 1 - topLine); |
| 227 | } else { |
| 228 | setCursorY(mouse.getY()); |
| 229 | } |
| 230 | alignCursor(); |
| 231 | if (inSelection) { |
| 232 | selectionColumn1 = document.getCursor(); |
| 233 | selectionLine1 = document.getLineNumber(); |
| 234 | } |
| 235 | return; |
| 236 | } |
| 237 | |
| 238 | document.setLineNumber(newLine); |
| 239 | setCursorY(mouse.getY()); |
| 240 | if (newX >= document.getCurrentLine().getDisplayLength()) { |
| 241 | document.end(); |
| 242 | alignCursor(); |
| 243 | } else { |
| 244 | document.setCursor(newX); |
| 245 | setCursorX(mouse.getX()); |
| 246 | } |
| 247 | if (inSelection) { |
| 248 | selectionColumn1 = document.getCursor(); |
| 249 | selectionLine1 = document.getLineNumber(); |
| 250 | } |
| 251 | return; |
| 252 | } else { |
| 253 | inSelection = false; |
| 254 | } |
| 255 | |
| 256 | // Pass to children |
| 257 | super.onMouseDown(mouse); |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * Handle mouse motion events. |
| 262 | * |
| 263 | * @param mouse mouse motion event |
| 264 | */ |
| 265 | @Override |
| 266 | public void onMouseMotion(final TMouseEvent mouse) { |
| 267 | |
| 268 | if (mouse.isMouse1()) { |
| 269 | // Set the row and column |
| 270 | int newLine = topLine + mouse.getY(); |
| 271 | int newX = leftColumn + mouse.getX(); |
| 272 | if ((newLine < 0) || (newX < 0)) { |
| 273 | return; |
| 274 | } |
| 275 | |
| 276 | // Selection. |
| 277 | if (inSelection) { |
| 278 | selectionColumn1 = newX; |
| 279 | selectionLine1 = newLine; |
| 280 | } else { |
| 281 | inSelection = true; |
| 282 | selectionColumn0 = newX; |
| 283 | selectionLine0 = newLine; |
| 284 | selectionColumn1 = selectionColumn0; |
| 285 | selectionLine1 = selectionLine0; |
| 286 | } |
| 287 | |
| 288 | if (newLine > document.getLineCount() - 1) { |
| 289 | // Go to the end |
| 290 | document.setLineNumber(document.getLineCount() - 1); |
| 291 | document.end(); |
| 292 | if (newLine > document.getLineCount() - 1) { |
| 293 | setCursorY(document.getLineCount() - 1 - topLine); |
| 294 | } else { |
| 295 | setCursorY(mouse.getY()); |
| 296 | } |
| 297 | alignCursor(); |
| 298 | if (inSelection) { |
| 299 | selectionColumn1 = document.getCursor(); |
| 300 | selectionLine1 = document.getLineNumber(); |
| 301 | } |
| 302 | return; |
| 303 | } |
| 304 | document.setLineNumber(newLine); |
| 305 | setCursorY(mouse.getY()); |
| 306 | if (newX >= document.getCurrentLine().getDisplayLength()) { |
| 307 | document.end(); |
| 308 | alignCursor(); |
| 309 | } else { |
| 310 | document.setCursor(newX); |
| 311 | setCursorX(mouse.getX()); |
| 312 | } |
| 313 | if (inSelection) { |
| 314 | selectionColumn1 = document.getCursor(); |
| 315 | selectionLine1 = document.getLineNumber(); |
| 316 | } |
| 317 | return; |
| 318 | } |
| 319 | |
| 320 | // Pass to children |
| 321 | super.onMouseDown(mouse); |
| 322 | } |
| 323 | |
| 324 | /** |
| 325 | * Handle keystrokes. |
| 326 | * |
| 327 | * @param keypress keystroke event |
| 328 | */ |
| 329 | @Override |
| 330 | public void onKeypress(final TKeypressEvent keypress) { |
| 331 | if (keypress.getKey().isShift()) { |
| 332 | if (keypress.equals(kbShiftLeft) |
| 333 | || keypress.equals(kbShiftRight) |
| 334 | || keypress.equals(kbShiftUp) |
| 335 | || keypress.equals(kbShiftDown) |
| 336 | || keypress.equals(kbShiftPgDn) |
| 337 | || keypress.equals(kbShiftPgUp) |
| 338 | || keypress.equals(kbShiftHome) |
| 339 | || keypress.equals(kbShiftEnd) |
| 340 | ) { |
| 341 | // Shifted navigation keys enable selection |
| 342 | if (!inSelection) { |
| 343 | inSelection = true; |
| 344 | selectionColumn0 = document.getCursor(); |
| 345 | selectionLine0 = document.getLineNumber(); |
| 346 | selectionColumn1 = selectionColumn0; |
| 347 | selectionLine1 = selectionLine0; |
| 348 | } |
| 349 | } |
| 350 | } else { |
| 351 | if (keypress.equals(kbLeft) |
| 352 | || keypress.equals(kbRight) |
| 353 | || keypress.equals(kbUp) |
| 354 | || keypress.equals(kbDown) |
| 355 | || keypress.equals(kbPgDn) |
| 356 | || keypress.equals(kbPgUp) |
| 357 | || keypress.equals(kbHome) |
| 358 | || keypress.equals(kbEnd) |
| 359 | ) { |
| 360 | // Non-shifted navigation keys disable selection. |
| 361 | inSelection = false; |
| 362 | } |
| 363 | if ((selectionColumn0 == selectionColumn1) |
| 364 | && (selectionLine0 == selectionLine1) |
| 365 | ) { |
| 366 | // The user clicked a spot and started typing. |
| 367 | inSelection = false; |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | if (keypress.equals(kbLeft) |
| 372 | || keypress.equals(kbShiftLeft) |
| 373 | ) { |
| 374 | document.left(); |
| 375 | alignTopLine(false); |
| 376 | } else if (keypress.equals(kbRight) |
| 377 | || keypress.equals(kbShiftRight) |
| 378 | ) { |
| 379 | document.right(); |
| 380 | alignTopLine(true); |
| 381 | } else if (keypress.equals(kbAltLeft) |
| 382 | || keypress.equals(kbCtrlLeft) |
| 383 | || keypress.equals(kbAltShiftLeft) |
| 384 | || keypress.equals(kbCtrlShiftLeft) |
| 385 | ) { |
| 386 | document.backwardsWord(); |
| 387 | alignTopLine(false); |
| 388 | } else if (keypress.equals(kbAltRight) |
| 389 | || keypress.equals(kbCtrlRight) |
| 390 | || keypress.equals(kbAltShiftRight) |
| 391 | || keypress.equals(kbCtrlShiftRight) |
| 392 | ) { |
| 393 | document.forwardsWord(); |
| 394 | alignTopLine(true); |
| 395 | } else if (keypress.equals(kbUp) |
| 396 | || keypress.equals(kbShiftUp) |
| 397 | ) { |
| 398 | document.up(); |
| 399 | alignTopLine(false); |
| 400 | } else if (keypress.equals(kbDown) |
| 401 | || keypress.equals(kbShiftDown) |
| 402 | ) { |
| 403 | document.down(); |
| 404 | alignTopLine(true); |
| 405 | } else if (keypress.equals(kbPgUp) |
| 406 | || keypress.equals(kbShiftPgUp) |
| 407 | ) { |
| 408 | document.up(getHeight() - 1); |
| 409 | alignTopLine(false); |
| 410 | } else if (keypress.equals(kbPgDn) |
| 411 | || keypress.equals(kbShiftPgDn) |
| 412 | ) { |
| 413 | document.down(getHeight() - 1); |
| 414 | alignTopLine(true); |
| 415 | } else if (keypress.equals(kbHome) |
| 416 | || keypress.equals(kbShiftHome) |
| 417 | ) { |
| 418 | if (document.home()) { |
| 419 | leftColumn = 0; |
| 420 | if (leftColumn < 0) { |
| 421 | leftColumn = 0; |
| 422 | } |
| 423 | setCursorX(0); |
| 424 | } |
| 425 | } else if (keypress.equals(kbEnd) |
| 426 | || keypress.equals(kbShiftEnd) |
| 427 | ) { |
| 428 | if (document.end()) { |
| 429 | alignCursor(); |
| 430 | } |
| 431 | } else if (keypress.equals(kbCtrlHome) |
| 432 | || keypress.equals(kbCtrlShiftHome) |
| 433 | ) { |
| 434 | document.setLineNumber(0); |
| 435 | document.home(); |
| 436 | topLine = 0; |
| 437 | leftColumn = 0; |
| 438 | setCursorX(0); |
| 439 | setCursorY(0); |
| 440 | } else if (keypress.equals(kbCtrlEnd) |
| 441 | || keypress.equals(kbCtrlShiftEnd) |
| 442 | ) { |
| 443 | document.setLineNumber(document.getLineCount() - 1); |
| 444 | document.end(); |
| 445 | alignTopLine(false); |
| 446 | } else if (keypress.equals(kbIns)) { |
| 447 | document.setOverwrite(!document.isOverwrite()); |
| 448 | } else if (keypress.equals(kbDel)) { |
| 449 | if (inSelection) { |
| 450 | deleteSelection(); |
| 451 | alignCursor(); |
| 452 | } else { |
| 453 | saveUndo(); |
| 454 | document.del(); |
| 455 | alignCursor(); |
| 456 | } |
| 457 | } else if (keypress.equals(kbBackspace) |
| 458 | || keypress.equals(kbBackspaceDel) |
| 459 | ) { |
| 460 | if (inSelection) { |
| 461 | deleteSelection(); |
| 462 | alignTopLine(false); |
| 463 | } else { |
| 464 | saveUndo(); |
| 465 | document.backspace(); |
| 466 | alignTopLine(false); |
| 467 | } |
| 468 | } else if (keypress.equals(kbTab)) { |
| 469 | deleteSelection(); |
| 470 | saveUndo(); |
| 471 | document.tab(); |
| 472 | alignCursor(); |
| 473 | } else if (keypress.equals(kbShiftTab)) { |
| 474 | deleteSelection(); |
| 475 | saveUndo(); |
| 476 | document.backTab(); |
| 477 | alignCursor(); |
| 478 | } else if (keypress.equals(kbEnter)) { |
| 479 | deleteSelection(); |
| 480 | saveUndo(); |
| 481 | document.enter(); |
| 482 | alignTopLine(true); |
| 483 | } else if (!keypress.getKey().isFnKey() |
| 484 | && !keypress.getKey().isAlt() |
| 485 | && !keypress.getKey().isCtrl() |
| 486 | ) { |
| 487 | // Plain old keystroke, process it |
| 488 | deleteSelection(); |
| 489 | saveUndo(); |
| 490 | document.addChar(keypress.getKey().getChar()); |
| 491 | alignCursor(); |
| 492 | } else { |
| 493 | // Pass other keys (tab etc.) on to TWidget |
| 494 | super.onKeypress(keypress); |
| 495 | } |
| 496 | |
| 497 | if (inSelection) { |
| 498 | selectionColumn1 = document.getCursor(); |
| 499 | selectionLine1 = document.getLineNumber(); |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | /** |
| 504 | * Method that subclasses can override to handle window/screen resize |
| 505 | * events. |
| 506 | * |
| 507 | * @param resize resize event |
| 508 | */ |
| 509 | @Override |
| 510 | public void onResize(final TResizeEvent resize) { |
| 511 | // Change my width/height, and pull the cursor in as needed. |
| 512 | if (resize.getType() == TResizeEvent.Type.WIDGET) { |
| 513 | setWidth(resize.getWidth()); |
| 514 | setHeight(resize.getHeight()); |
| 515 | // See if the cursor is now outside the window, and if so move |
| 516 | // things. |
| 517 | if (getCursorX() >= getWidth()) { |
| 518 | leftColumn += getCursorX() - (getWidth() - 1); |
| 519 | setCursorX(getWidth() - 1); |
| 520 | } |
| 521 | if (getCursorY() >= getHeight()) { |
| 522 | topLine += getCursorY() - (getHeight() - 1); |
| 523 | setCursorY(getHeight() - 1); |
| 524 | } |
| 525 | } else { |
| 526 | // Let superclass handle it |
| 527 | super.onResize(resize); |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | /** |
| 532 | * Handle posted command events. |
| 533 | * |
| 534 | * @param command command event |
| 535 | */ |
| 536 | @Override |
| 537 | public void onCommand(final TCommandEvent command) { |
| 538 | if (command.equals(cmCut)) { |
| 539 | // Copy text to clipboard, and then remove it. |
| 540 | copySelection(); |
| 541 | deleteSelection(); |
| 542 | return; |
| 543 | } |
| 544 | |
| 545 | if (command.equals(cmCopy)) { |
| 546 | // Copy text to clipboard. |
| 547 | copySelection(); |
| 548 | return; |
| 549 | } |
| 550 | |
| 551 | if (command.equals(cmPaste)) { |
| 552 | // Delete selected text, then paste text from clipboard. |
| 553 | deleteSelection(); |
| 554 | |
| 555 | String text = getClipboard().pasteText(); |
| 556 | if (text != null) { |
| 557 | for (int i = 0; i < text.length(); ) { |
| 558 | int ch = text.codePointAt(i); |
| 559 | switch (ch) { |
| 560 | case '\n': |
| 561 | onKeypress(new TKeypressEvent(kbEnter)); |
| 562 | break; |
| 563 | case '\t': |
| 564 | onKeypress(new TKeypressEvent(kbTab)); |
| 565 | break; |
| 566 | default: |
| 567 | if ((ch >= 0x20) && (ch != 0x7F)) { |
| 568 | onKeypress(new TKeypressEvent(false, 0, ch, |
| 569 | false, false, false)); |
| 570 | } |
| 571 | break; |
| 572 | } |
| 573 | |
| 574 | i += Character.charCount(ch); |
| 575 | } |
| 576 | } |
| 577 | return; |
| 578 | } |
| 579 | |
| 580 | if (command.equals(cmClear)) { |
| 581 | // Remove text. |
| 582 | deleteSelection(); |
| 583 | return; |
| 584 | } |
| 585 | |
| 586 | } |
| 587 | |
| 588 | // ------------------------------------------------------------------------ |
| 589 | // TWidget ---------------------------------------------------------------- |
| 590 | // ------------------------------------------------------------------------ |
| 591 | |
| 592 | /** |
| 593 | * Draw the text box. |
| 594 | */ |
| 595 | @Override |
| 596 | public void draw() { |
| 597 | CellAttributes selectedColor = getTheme().getColor("teditor.selected"); |
| 598 | |
| 599 | boolean drawSelection = true; |
| 600 | |
| 601 | int startCol = selectionColumn0; |
| 602 | int startRow = selectionLine0; |
| 603 | int endCol = selectionColumn1; |
| 604 | int endRow = selectionLine1; |
| 605 | |
| 606 | if (((selectionColumn1 < selectionColumn0) |
| 607 | && (selectionLine1 == selectionLine0)) |
| 608 | || (selectionLine1 < selectionLine0) |
| 609 | ) { |
| 610 | // The user selected from bottom-to-top and/or right-to-left. |
| 611 | // Reverse the coordinates for the inverted section. |
| 612 | startCol = selectionColumn1; |
| 613 | startRow = selectionLine1; |
| 614 | endCol = selectionColumn0; |
| 615 | endRow = selectionLine0; |
| 616 | } |
| 617 | if ((startCol == endCol) && (startRow == endRow)) { |
| 618 | drawSelection = false; |
| 619 | } |
| 620 | |
| 621 | for (int i = 0; i < getHeight(); i++) { |
| 622 | // Background line |
| 623 | getScreen().hLineXY(0, i, getWidth(), ' ', defaultColor); |
| 624 | |
| 625 | // Now draw document's line |
| 626 | if (topLine + i < document.getLineCount()) { |
| 627 | Line line = document.getLine(topLine + i); |
| 628 | int x = 0; |
| 629 | for (Word word: line.getWords()) { |
| 630 | // For now, we are cheating: draw outside the left region |
| 631 | // if needed and let screen do the clipping. |
| 632 | getScreen().putStringXY(x - leftColumn, i, word.getText(), |
| 633 | word.getColor()); |
| 634 | x += word.getDisplayLength(); |
| 635 | if (x - leftColumn > getWidth()) { |
| 636 | break; |
| 637 | } |
| 638 | } |
| 639 | |
| 640 | // Highlight selected region |
| 641 | if (inSelection && drawSelection) { |
| 642 | if (startRow == endRow) { |
| 643 | if (topLine + i == startRow) { |
| 644 | for (x = startCol; x <= endCol; x++) { |
| 645 | putAttrXY(x - leftColumn, i, selectedColor); |
| 646 | } |
| 647 | } |
| 648 | } else { |
| 649 | if (topLine + i == startRow) { |
| 650 | for (x = startCol; x < line.getDisplayLength(); x++) { |
| 651 | putAttrXY(x - leftColumn, i, selectedColor); |
| 652 | } |
| 653 | } else if (topLine + i == endRow) { |
| 654 | for (x = 0; x <= endCol; x++) { |
| 655 | putAttrXY(x - leftColumn, i, selectedColor); |
| 656 | } |
| 657 | } else if ((topLine + i >= startRow) |
| 658 | && (topLine + i <= endRow) |
| 659 | ) { |
| 660 | for (x = 0; x < getWidth(); x++) { |
| 661 | putAttrXY(x, i, selectedColor); |
| 662 | } |
| 663 | } |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | } |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | // ------------------------------------------------------------------------ |
| 672 | // TEditorWidget ---------------------------------------------------------- |
| 673 | // ------------------------------------------------------------------------ |
| 674 | |
| 675 | /** |
| 676 | * Set the undo level. |
| 677 | * |
| 678 | * @param undoLevel the maximum number of undo operations |
| 679 | */ |
| 680 | public void setUndoLevel(final int undoLevel) { |
| 681 | this.undoLevel = undoLevel; |
| 682 | } |
| 683 | |
| 684 | /** |
| 685 | * Align visible area with document current line. |
| 686 | * |
| 687 | * @param topLineIsTop if true, make the top visible line the document |
| 688 | * current line if it was off-screen. If false, make the bottom visible |
| 689 | * line the document current line. |
| 690 | */ |
| 691 | private void alignTopLine(final boolean topLineIsTop) { |
| 692 | int line = document.getLineNumber(); |
| 693 | |
| 694 | if ((line < topLine) || (line > topLine + getHeight() - 1)) { |
| 695 | // Need to move topLine to bring document back into view. |
| 696 | if (topLineIsTop) { |
| 697 | topLine = line - (getHeight() - 1); |
| 698 | if (topLine < 0) { |
| 699 | topLine = 0; |
| 700 | } |
| 701 | assert (topLine >= 0); |
| 702 | } else { |
| 703 | topLine = line; |
| 704 | assert (topLine >= 0); |
| 705 | } |
| 706 | } |
| 707 | |
| 708 | /* |
| 709 | System.err.println("line " + line + " topLine " + topLine); |
| 710 | */ |
| 711 | |
| 712 | // Document is in view, let's set cursorY |
| 713 | assert (line >= topLine); |
| 714 | setCursorY(line - topLine); |
| 715 | alignCursor(); |
| 716 | } |
| 717 | |
| 718 | /** |
| 719 | * Align document current line with visible area. |
| 720 | * |
| 721 | * @param topLineIsTop if true, make the top visible line the document |
| 722 | * current line if it was off-screen. If false, make the bottom visible |
| 723 | * line the document current line. |
| 724 | */ |
| 725 | private void alignDocument(final boolean topLineIsTop) { |
| 726 | int line = document.getLineNumber(); |
| 727 | int cursor = document.getCursor(); |
| 728 | |
| 729 | if ((line < topLine) || (line > topLine + getHeight() - 1)) { |
| 730 | // Need to move document to ensure it fits view. |
| 731 | if (topLineIsTop) { |
| 732 | document.setLineNumber(topLine); |
| 733 | } else { |
| 734 | document.setLineNumber(topLine + (getHeight() - 1)); |
| 735 | } |
| 736 | if (cursor < document.getCurrentLine().getDisplayLength()) { |
| 737 | document.setCursor(cursor); |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | /* |
| 742 | System.err.println("getLineNumber() " + document.getLineNumber() + |
| 743 | " topLine " + topLine); |
| 744 | */ |
| 745 | |
| 746 | // Document is in view, let's set cursorY |
| 747 | setCursorY(document.getLineNumber() - topLine); |
| 748 | alignCursor(); |
| 749 | } |
| 750 | |
| 751 | /** |
| 752 | * Align visible cursor with document cursor. |
| 753 | */ |
| 754 | private void alignCursor() { |
| 755 | int width = getWidth(); |
| 756 | |
| 757 | int desiredX = document.getCursor() - leftColumn; |
| 758 | if (desiredX < 0) { |
| 759 | // We need to push the screen to the left. |
| 760 | leftColumn = document.getCursor(); |
| 761 | } else if (desiredX > width - 1) { |
| 762 | // We need to push the screen to the right. |
| 763 | leftColumn = document.getCursor() - (width - 1); |
| 764 | } |
| 765 | |
| 766 | /* |
| 767 | System.err.println("document cursor " + document.getCursor() + |
| 768 | " leftColumn " + leftColumn); |
| 769 | */ |
| 770 | |
| 771 | |
| 772 | setCursorX(document.getCursor() - leftColumn); |
| 773 | } |
| 774 | |
| 775 | /** |
| 776 | * Get the number of lines in the underlying Document. |
| 777 | * |
| 778 | * @return the number of lines |
| 779 | */ |
| 780 | public int getLineCount() { |
| 781 | return document.getLineCount(); |
| 782 | } |
| 783 | |
| 784 | /** |
| 785 | * Get the current visible top row number. 1-based. |
| 786 | * |
| 787 | * @return the visible top row number. Row 1 is the first row. |
| 788 | */ |
| 789 | public int getVisibleRowNumber() { |
| 790 | return topLine + 1; |
| 791 | } |
| 792 | |
| 793 | /** |
| 794 | * Set the current visible row number. 1-based. |
| 795 | * |
| 796 | * @param row the new visible row number. Row 1 is the first row. |
| 797 | */ |
| 798 | public void setVisibleRowNumber(final int row) { |
| 799 | assert (row > 0); |
| 800 | if ((row > 0) && (row < document.getLineCount())) { |
| 801 | topLine = row - 1; |
| 802 | alignDocument(true); |
| 803 | } |
| 804 | } |
| 805 | |
| 806 | /** |
| 807 | * Get the current editing row number. 1-based. |
| 808 | * |
| 809 | * @return the editing row number. Row 1 is the first row. |
| 810 | */ |
| 811 | public int getEditingRowNumber() { |
| 812 | return document.getLineNumber() + 1; |
| 813 | } |
| 814 | |
| 815 | /** |
| 816 | * Set the current editing row number. 1-based. |
| 817 | * |
| 818 | * @param row the new editing row number. Row 1 is the first row. |
| 819 | */ |
| 820 | public void setEditingRowNumber(final int row) { |
| 821 | assert (row > 0); |
| 822 | if ((row > 0) && (row < document.getLineCount())) { |
| 823 | document.setLineNumber(row - 1); |
| 824 | alignTopLine(true); |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | /** |
| 829 | * Set the current visible column number. 1-based. |
| 830 | * |
| 831 | * @return the visible column number. Column 1 is the first column. |
| 832 | */ |
| 833 | public int getVisibleColumnNumber() { |
| 834 | return leftColumn + 1; |
| 835 | } |
| 836 | |
| 837 | /** |
| 838 | * Set the current visible column number. 1-based. |
| 839 | * |
| 840 | * @param column the new visible column number. Column 1 is the first |
| 841 | * column. |
| 842 | */ |
| 843 | public void setVisibleColumnNumber(final int column) { |
| 844 | assert (column > 0); |
| 845 | if ((column > 0) && (column < document.getLineLengthMax())) { |
| 846 | leftColumn = column - 1; |
| 847 | alignDocument(true); |
| 848 | } |
| 849 | } |
| 850 | |
| 851 | /** |
| 852 | * Get the current editing column number. 1-based. |
| 853 | * |
| 854 | * @return the editing column number. Column 1 is the first column. |
| 855 | */ |
| 856 | public int getEditingColumnNumber() { |
| 857 | return document.getCursor() + 1; |
| 858 | } |
| 859 | |
| 860 | /** |
| 861 | * Set the current editing column number. 1-based. |
| 862 | * |
| 863 | * @param column the new editing column number. Column 1 is the first |
| 864 | * column. |
| 865 | */ |
| 866 | public void setEditingColumnNumber(final int column) { |
| 867 | if ((column > 0) && (column < document.getLineLength())) { |
| 868 | document.setCursor(column - 1); |
| 869 | alignCursor(); |
| 870 | } |
| 871 | } |
| 872 | |
| 873 | /** |
| 874 | * Get the maximum possible row number. 1-based. |
| 875 | * |
| 876 | * @return the maximum row number. Row 1 is the first row. |
| 877 | */ |
| 878 | public int getMaximumRowNumber() { |
| 879 | return document.getLineCount() + 1; |
| 880 | } |
| 881 | |
| 882 | /** |
| 883 | * Get the maximum possible column number. 1-based. |
| 884 | * |
| 885 | * @return the maximum column number. Column 1 is the first column. |
| 886 | */ |
| 887 | public int getMaximumColumnNumber() { |
| 888 | return document.getLineLengthMax() + 1; |
| 889 | } |
| 890 | |
| 891 | /** |
| 892 | * Get the current editing row plain text. 1-based. |
| 893 | * |
| 894 | * @param row the editing row number. Row 1 is the first row. |
| 895 | * @return the plain text of the row |
| 896 | */ |
| 897 | public String getEditingRawLine(final int row) { |
| 898 | Line line = document.getLine(row - 1); |
| 899 | return line.getRawString(); |
| 900 | } |
| 901 | |
| 902 | /** |
| 903 | * Get the dirty value. |
| 904 | * |
| 905 | * @return true if the buffer is dirty |
| 906 | */ |
| 907 | public boolean isDirty() { |
| 908 | return document.isDirty(); |
| 909 | } |
| 910 | |
| 911 | /** |
| 912 | * Unset the dirty flag. |
| 913 | */ |
| 914 | public void setNotDirty() { |
| 915 | document.setNotDirty(); |
| 916 | } |
| 917 | |
| 918 | /** |
| 919 | * Get the overwrite value. |
| 920 | * |
| 921 | * @return true if new text will overwrite old text |
| 922 | */ |
| 923 | public boolean isOverwrite() { |
| 924 | return document.isOverwrite(); |
| 925 | } |
| 926 | |
| 927 | /** |
| 928 | * Save contents to file. |
| 929 | * |
| 930 | * @param filename file to save to |
| 931 | * @throws IOException if a java.io operation throws |
| 932 | */ |
| 933 | public void saveToFilename(final String filename) throws IOException { |
| 934 | document.saveToFilename(filename); |
| 935 | } |
| 936 | |
| 937 | /** |
| 938 | * Delete text within the selection bounds. |
| 939 | */ |
| 940 | private void deleteSelection() { |
| 941 | if (!inSelection) { |
| 942 | return; |
| 943 | } |
| 944 | |
| 945 | saveUndo(); |
| 946 | |
| 947 | inSelection = false; |
| 948 | |
| 949 | int startCol = selectionColumn0; |
| 950 | int startRow = selectionLine0; |
| 951 | int endCol = selectionColumn1; |
| 952 | int endRow = selectionLine1; |
| 953 | |
| 954 | /* |
| 955 | System.err.println("INITIAL: " + startRow + " " + startCol + " " + |
| 956 | endRow + " " + endCol + " " + |
| 957 | document.getLineNumber() + " " + document.getCursor()); |
| 958 | */ |
| 959 | |
| 960 | if (((selectionColumn1 < selectionColumn0) |
| 961 | && (selectionLine1 == selectionLine0)) |
| 962 | || (selectionLine1 < selectionLine0) |
| 963 | ) { |
| 964 | // The user selected from bottom-to-top and/or right-to-left. |
| 965 | // Reverse the coordinates for the inverted section. |
| 966 | startCol = selectionColumn1; |
| 967 | startRow = selectionLine1; |
| 968 | endCol = selectionColumn0; |
| 969 | endRow = selectionLine0; |
| 970 | |
| 971 | if (endRow >= document.getLineCount()) { |
| 972 | // The selection started beyond EOF, trim it to EOF. |
| 973 | endRow = document.getLineCount() - 1; |
| 974 | endCol = document.getLine(endRow).getDisplayLength(); |
| 975 | } else if (endRow == document.getLineCount() - 1) { |
| 976 | // The selection started beyond EOF, trim it to EOF. |
| 977 | if (endCol >= document.getLine(endRow).getDisplayLength()) { |
| 978 | endCol = document.getLine(endRow).getDisplayLength() - 1; |
| 979 | } |
| 980 | } |
| 981 | } |
| 982 | /* |
| 983 | System.err.println("FLIP: " + startRow + " " + startCol + " " + |
| 984 | endRow + " " + endCol + " " + |
| 985 | document.getLineNumber() + " " + document.getCursor()); |
| 986 | System.err.println(" --END: " + endRow + " " + document.getLineCount() + |
| 987 | " " + document.getLine(endRow).getDisplayLength()); |
| 988 | */ |
| 989 | |
| 990 | assert (endRow < document.getLineCount()); |
| 991 | if (endCol >= document.getLine(endRow).getDisplayLength()) { |
| 992 | endCol = document.getLine(endRow).getDisplayLength() - 1; |
| 993 | } |
| 994 | if (endCol < 0) { |
| 995 | endCol = 0; |
| 996 | } |
| 997 | if (startCol >= document.getLine(startRow).getDisplayLength()) { |
| 998 | startCol = document.getLine(startRow).getDisplayLength() - 1; |
| 999 | } |
| 1000 | if (startCol < 0) { |
| 1001 | startCol = 0; |
| 1002 | } |
| 1003 | |
| 1004 | // Place the cursor on the selection end, and "press backspace" until |
| 1005 | // the cursor matches the selection start. |
| 1006 | /* |
| 1007 | System.err.println("BEFORE: " + startRow + " " + startCol + " " + |
| 1008 | endRow + " " + endCol + " " + |
| 1009 | document.getLineNumber() + " " + document.getCursor()); |
| 1010 | */ |
| 1011 | document.setLineNumber(endRow); |
| 1012 | document.setCursor(endCol + 1); |
| 1013 | while (!((document.getLineNumber() == startRow) |
| 1014 | && (document.getCursor() == startCol)) |
| 1015 | ) { |
| 1016 | /* |
| 1017 | System.err.println("DURING: " + startRow + " " + startCol + " " + |
| 1018 | endRow + " " + endCol + " " + |
| 1019 | document.getLineNumber() + " " + document.getCursor()); |
| 1020 | */ |
| 1021 | |
| 1022 | document.backspace(); |
| 1023 | } |
| 1024 | alignTopLine(true); |
| 1025 | } |
| 1026 | |
| 1027 | /** |
| 1028 | * Copy text within the selection bounds to clipboard. |
| 1029 | */ |
| 1030 | private void copySelection() { |
| 1031 | if (!inSelection) { |
| 1032 | return; |
| 1033 | } |
| 1034 | getClipboard().copyText(getSelection()); |
| 1035 | } |
| 1036 | |
| 1037 | /** |
| 1038 | * Set the selection. |
| 1039 | * |
| 1040 | * @param startRow the starting row number. 0-based: row 0 is the first |
| 1041 | * row. |
| 1042 | * @param startColumn the starting column number. 0-based: column 0 is |
| 1043 | * the first column. |
| 1044 | * @param endRow the ending row number. 0-based: row 0 is the first row. |
| 1045 | * @param endColumn the ending column number. 0-based: column 0 is the |
| 1046 | * first column. |
| 1047 | */ |
| 1048 | public void setSelection(final int startRow, final int startColumn, |
| 1049 | final int endRow, final int endColumn) { |
| 1050 | |
| 1051 | inSelection = true; |
| 1052 | selectionLine0 = startRow; |
| 1053 | selectionColumn0 = startColumn; |
| 1054 | selectionLine1 = endRow; |
| 1055 | selectionColumn1 = endColumn; |
| 1056 | } |
| 1057 | |
| 1058 | /** |
| 1059 | * Copy text within the selection bounds to a string. |
| 1060 | * |
| 1061 | * @return the selection as a string, or null if there is no selection |
| 1062 | */ |
| 1063 | public String getSelection() { |
| 1064 | if (!inSelection) { |
| 1065 | return null; |
| 1066 | } |
| 1067 | |
| 1068 | int startCol = selectionColumn0; |
| 1069 | int startRow = selectionLine0; |
| 1070 | int endCol = selectionColumn1; |
| 1071 | int endRow = selectionLine1; |
| 1072 | |
| 1073 | if (((selectionColumn1 < selectionColumn0) |
| 1074 | && (selectionLine1 == selectionLine0)) |
| 1075 | || (selectionLine1 < selectionLine0) |
| 1076 | ) { |
| 1077 | // The user selected from bottom-to-top and/or right-to-left. |
| 1078 | // Reverse the coordinates for the inverted section. |
| 1079 | startCol = selectionColumn1; |
| 1080 | startRow = selectionLine1; |
| 1081 | endCol = selectionColumn0; |
| 1082 | endRow = selectionLine0; |
| 1083 | } |
| 1084 | |
| 1085 | StringBuilder sb = new StringBuilder(); |
| 1086 | |
| 1087 | if (endRow > startRow) { |
| 1088 | // First line |
| 1089 | String line = document.getLine(startRow).getRawString(); |
| 1090 | int x = 0; |
| 1091 | for (int i = 0; i < line.length(); ) { |
| 1092 | int ch = line.codePointAt(i); |
| 1093 | |
| 1094 | if (x >= startCol) { |
| 1095 | sb.append(Character.toChars(ch)); |
| 1096 | } |
| 1097 | x += StringUtils.width(ch); |
| 1098 | i += Character.charCount(ch); |
| 1099 | } |
| 1100 | sb.append("\n"); |
| 1101 | |
| 1102 | // Middle lines |
| 1103 | for (int y = startRow + 1; y < endRow; y++) { |
| 1104 | sb.append(document.getLine(y).getRawString()); |
| 1105 | sb.append("\n"); |
| 1106 | } |
| 1107 | |
| 1108 | // Final line |
| 1109 | line = document.getLine(endRow).getRawString(); |
| 1110 | x = 0; |
| 1111 | for (int i = 0; i < line.length(); ) { |
| 1112 | int ch = line.codePointAt(i); |
| 1113 | |
| 1114 | if (x > endCol) { |
| 1115 | break; |
| 1116 | } |
| 1117 | |
| 1118 | sb.append(Character.toChars(ch)); |
| 1119 | x += StringUtils.width(ch); |
| 1120 | i += Character.charCount(ch); |
| 1121 | } |
| 1122 | } else { |
| 1123 | assert (startRow == endRow); |
| 1124 | |
| 1125 | // Only one line |
| 1126 | String line = document.getLine(startRow).getRawString(); |
| 1127 | int x = 0; |
| 1128 | for (int i = 0; i < line.length(); ) { |
| 1129 | int ch = line.codePointAt(i); |
| 1130 | |
| 1131 | if ((x >= startCol) && (x <= endCol)) { |
| 1132 | sb.append(Character.toChars(ch)); |
| 1133 | } |
| 1134 | |
| 1135 | x += StringUtils.width(ch); |
| 1136 | i += Character.charCount(ch); |
| 1137 | } |
| 1138 | } |
| 1139 | return sb.toString(); |
| 1140 | } |
| 1141 | |
| 1142 | /** |
| 1143 | * Get the selection starting row number. |
| 1144 | * |
| 1145 | * @return the starting row number, or -1 if there is no selection. |
| 1146 | * 0-based: row 0 is the first row. |
| 1147 | */ |
| 1148 | public int getSelectionStartRow() { |
| 1149 | if (!inSelection) { |
| 1150 | return -1; |
| 1151 | } |
| 1152 | |
| 1153 | int startCol = selectionColumn0; |
| 1154 | int startRow = selectionLine0; |
| 1155 | int endCol = selectionColumn1; |
| 1156 | int endRow = selectionLine1; |
| 1157 | |
| 1158 | if (((selectionColumn1 < selectionColumn0) |
| 1159 | && (selectionLine1 == selectionLine0)) |
| 1160 | || (selectionLine1 < selectionLine0) |
| 1161 | ) { |
| 1162 | // The user selected from bottom-to-top and/or right-to-left. |
| 1163 | // Reverse the coordinates for the inverted section. |
| 1164 | startCol = selectionColumn1; |
| 1165 | startRow = selectionLine1; |
| 1166 | endCol = selectionColumn0; |
| 1167 | endRow = selectionLine0; |
| 1168 | } |
| 1169 | return startRow; |
| 1170 | } |
| 1171 | |
| 1172 | /** |
| 1173 | * Get the selection starting column number. |
| 1174 | * |
| 1175 | * @return the starting column number, or -1 if there is no selection. |
| 1176 | * 0-based: column 0 is the first column. |
| 1177 | */ |
| 1178 | public int getSelectionStartColumn() { |
| 1179 | if (!inSelection) { |
| 1180 | return -1; |
| 1181 | } |
| 1182 | |
| 1183 | int startCol = selectionColumn0; |
| 1184 | int startRow = selectionLine0; |
| 1185 | int endCol = selectionColumn1; |
| 1186 | int endRow = selectionLine1; |
| 1187 | |
| 1188 | if (((selectionColumn1 < selectionColumn0) |
| 1189 | && (selectionLine1 == selectionLine0)) |
| 1190 | || (selectionLine1 < selectionLine0) |
| 1191 | ) { |
| 1192 | // The user selected from bottom-to-top and/or right-to-left. |
| 1193 | // Reverse the coordinates for the inverted section. |
| 1194 | startCol = selectionColumn1; |
| 1195 | startRow = selectionLine1; |
| 1196 | endCol = selectionColumn0; |
| 1197 | endRow = selectionLine0; |
| 1198 | } |
| 1199 | return startCol; |
| 1200 | } |
| 1201 | |
| 1202 | /** |
| 1203 | * Get the selection ending row number. |
| 1204 | * |
| 1205 | * @return the ending row number, or -1 if there is no selection. |
| 1206 | * 0-based: row 0 is the first row. |
| 1207 | */ |
| 1208 | public int getSelectionEndRow() { |
| 1209 | if (!inSelection) { |
| 1210 | return -1; |
| 1211 | } |
| 1212 | |
| 1213 | int startCol = selectionColumn0; |
| 1214 | int startRow = selectionLine0; |
| 1215 | int endCol = selectionColumn1; |
| 1216 | int endRow = selectionLine1; |
| 1217 | |
| 1218 | if (((selectionColumn1 < selectionColumn0) |
| 1219 | && (selectionLine1 == selectionLine0)) |
| 1220 | || (selectionLine1 < selectionLine0) |
| 1221 | ) { |
| 1222 | // The user selected from bottom-to-top and/or right-to-left. |
| 1223 | // Reverse the coordinates for the inverted section. |
| 1224 | startCol = selectionColumn1; |
| 1225 | startRow = selectionLine1; |
| 1226 | endCol = selectionColumn0; |
| 1227 | endRow = selectionLine0; |
| 1228 | } |
| 1229 | return endRow; |
| 1230 | } |
| 1231 | |
| 1232 | /** |
| 1233 | * Get the selection ending column number. |
| 1234 | * |
| 1235 | * @return the ending column number, or -1 if there is no selection. |
| 1236 | * 0-based: column 0 is the first column. |
| 1237 | */ |
| 1238 | public int getSelectionEndColumn() { |
| 1239 | if (!inSelection) { |
| 1240 | return -1; |
| 1241 | } |
| 1242 | |
| 1243 | int startCol = selectionColumn0; |
| 1244 | int startRow = selectionLine0; |
| 1245 | int endCol = selectionColumn1; |
| 1246 | int endRow = selectionLine1; |
| 1247 | |
| 1248 | if (((selectionColumn1 < selectionColumn0) |
| 1249 | && (selectionLine1 == selectionLine0)) |
| 1250 | || (selectionLine1 < selectionLine0) |
| 1251 | ) { |
| 1252 | // The user selected from bottom-to-top and/or right-to-left. |
| 1253 | // Reverse the coordinates for the inverted section. |
| 1254 | startCol = selectionColumn1; |
| 1255 | startRow = selectionLine1; |
| 1256 | endCol = selectionColumn0; |
| 1257 | endRow = selectionLine0; |
| 1258 | } |
| 1259 | return endCol; |
| 1260 | } |
| 1261 | |
| 1262 | /** |
| 1263 | * Unset the selection. |
| 1264 | */ |
| 1265 | public void unsetSelection() { |
| 1266 | inSelection = false; |
| 1267 | } |
| 1268 | |
| 1269 | /** |
| 1270 | * Replace whatever is being selected with new text. If not in |
| 1271 | * selection, nothing is replaced. |
| 1272 | * |
| 1273 | * @param text the new replacement text |
| 1274 | */ |
| 1275 | public void replaceSelection(final String text) { |
| 1276 | if (!inSelection) { |
| 1277 | return; |
| 1278 | } |
| 1279 | |
| 1280 | // Delete selected text, then paste text from clipboard. |
| 1281 | deleteSelection(); |
| 1282 | |
| 1283 | for (int i = 0; i < text.length(); ) { |
| 1284 | int ch = text.codePointAt(i); |
| 1285 | switch (ch) { |
| 1286 | case '\n': |
| 1287 | onKeypress(new TKeypressEvent(kbEnter)); |
| 1288 | break; |
| 1289 | case '\t': |
| 1290 | onKeypress(new TKeypressEvent(kbTab)); |
| 1291 | break; |
| 1292 | default: |
| 1293 | if ((ch >= 0x20) && (ch != 0x7F)) { |
| 1294 | onKeypress(new TKeypressEvent(false, 0, ch, |
| 1295 | false, false, false)); |
| 1296 | } |
| 1297 | break; |
| 1298 | } |
| 1299 | i += Character.charCount(ch); |
| 1300 | } |
| 1301 | } |
| 1302 | |
| 1303 | /** |
| 1304 | * Check if selection is available. |
| 1305 | * |
| 1306 | * @return true if a selection has been made |
| 1307 | */ |
| 1308 | public boolean hasSelection() { |
| 1309 | return inSelection; |
| 1310 | } |
| 1311 | |
| 1312 | /** |
| 1313 | * Get the entire contents of the editor as one string. |
| 1314 | * |
| 1315 | * @return the editor contents |
| 1316 | */ |
| 1317 | public String getText() { |
| 1318 | return document.getText(); |
| 1319 | } |
| 1320 | |
| 1321 | /** |
| 1322 | * Set the entire contents of the editor from one string. |
| 1323 | * |
| 1324 | * @param text the new contents |
| 1325 | */ |
| 1326 | public void setText(final String text) { |
| 1327 | document = new Document(text, defaultColor); |
| 1328 | unsetSelection(); |
| 1329 | topLine = 0; |
| 1330 | leftColumn = 0; |
| 1331 | } |
| 1332 | |
| 1333 | // ------------------------------------------------------------------------ |
| 1334 | // EditMenuUser ----------------------------------------------------------- |
| 1335 | // ------------------------------------------------------------------------ |
| 1336 | |
| 1337 | /** |
| 1338 | * Check if the cut menu item should be enabled. |
| 1339 | * |
| 1340 | * @return true if the cut menu item should be enabled |
| 1341 | */ |
| 1342 | public boolean isEditMenuCut() { |
| 1343 | return true; |
| 1344 | } |
| 1345 | |
| 1346 | /** |
| 1347 | * Check if the copy menu item should be enabled. |
| 1348 | * |
| 1349 | * @return true if the copy menu item should be enabled |
| 1350 | */ |
| 1351 | public boolean isEditMenuCopy() { |
| 1352 | return true; |
| 1353 | } |
| 1354 | |
| 1355 | /** |
| 1356 | * Check if the paste menu item should be enabled. |
| 1357 | * |
| 1358 | * @return true if the paste menu item should be enabled |
| 1359 | */ |
| 1360 | public boolean isEditMenuPaste() { |
| 1361 | return true; |
| 1362 | } |
| 1363 | |
| 1364 | /** |
| 1365 | * Check if the clear menu item should be enabled. |
| 1366 | * |
| 1367 | * @return true if the clear menu item should be enabled |
| 1368 | */ |
| 1369 | public boolean isEditMenuClear() { |
| 1370 | return true; |
| 1371 | } |
| 1372 | |
| 1373 | /** |
| 1374 | * Save undo state. |
| 1375 | */ |
| 1376 | private void saveUndo() { |
| 1377 | SavedState state = new SavedState(); |
| 1378 | state.document = document.dup(); |
| 1379 | state.topLine = topLine; |
| 1380 | state.leftColumn = leftColumn; |
| 1381 | if (undoLevel > 0) { |
| 1382 | while (undoList.size() > undoLevel) { |
| 1383 | undoList.remove(0); |
| 1384 | } |
| 1385 | } |
| 1386 | undoList.add(state); |
| 1387 | undoListI = undoList.size() - 1; |
| 1388 | } |
| 1389 | |
| 1390 | /** |
| 1391 | * Undo an edit. |
| 1392 | */ |
| 1393 | public void undo() { |
| 1394 | inSelection = false; |
| 1395 | if ((undoListI >= 0) && (undoListI < undoList.size())) { |
| 1396 | SavedState state = undoList.get(undoListI); |
| 1397 | document = state.document.dup(); |
| 1398 | topLine = state.topLine; |
| 1399 | leftColumn = state.leftColumn; |
| 1400 | undoListI--; |
| 1401 | setCursorY(document.getLineNumber() - topLine); |
| 1402 | alignCursor(); |
| 1403 | } |
| 1404 | } |
| 1405 | |
| 1406 | /** |
| 1407 | * Redo an edit. |
| 1408 | */ |
| 1409 | public void redo() { |
| 1410 | inSelection = false; |
| 1411 | if ((undoListI >= 0) && (undoListI < undoList.size())) { |
| 1412 | SavedState state = undoList.get(undoListI); |
| 1413 | document = state.document.dup(); |
| 1414 | topLine = state.topLine; |
| 1415 | leftColumn = state.leftColumn; |
| 1416 | undoListI++; |
| 1417 | setCursorY(document.getLineNumber() - topLine); |
| 1418 | alignCursor(); |
| 1419 | } |
| 1420 | } |
| 1421 | |
| 1422 | /** |
| 1423 | * Trim trailing whitespace from lines and trailing empty |
| 1424 | * lines from the document. |
| 1425 | */ |
| 1426 | public void cleanWhitespace() { |
| 1427 | document.cleanWhitespace(); |
| 1428 | setCursorY(document.getLineNumber() - topLine); |
| 1429 | alignCursor(); |
| 1430 | } |
| 1431 | |
| 1432 | /** |
| 1433 | * Set keyword highlighting. |
| 1434 | * |
| 1435 | * @param enabled if true, enable keyword highlighting |
| 1436 | */ |
| 1437 | public void setHighlighting(final boolean enabled) { |
| 1438 | document.setHighlighting(enabled); |
| 1439 | } |
| 1440 | |
| 1441 | } |