Mercurial > vim
annotate src/move.c @ 6247:fe1827921d50 v7.4.458
updated for version 7.4.458
Problem: Issue 252: Cursor moves in a zero-height window.
Solution: Check for zero height. (idea by Christian Brabandt)
| author | Bram Moolenaar <bram@vim.org> |
|---|---|
| date | Tue, 23 Sep 2014 18:37:56 +0200 |
| parents | b650f2db8f96 |
| children | 7cda721eadb0 |
| rev | line source |
|---|---|
| 7 | 1 /* vi:set ts=8 sts=4 sw=4: |
| 2 * | |
| 3 * VIM - Vi IMproved by Bram Moolenaar | |
| 4 * | |
| 5 * Do ":help uganda" in Vim to read copying and usage conditions. | |
| 6 * Do ":help credits" in Vim to see a list of people who contributed. | |
| 7 * See README.txt for an overview of the Vim source code. | |
| 8 */ | |
| 9 /* | |
| 10 * move.c: Functions for moving the cursor and scrolling text. | |
| 11 * | |
| 12 * There are two ways to move the cursor: | |
| 13 * 1. Move the cursor directly, the text is scrolled to keep the cursor in the | |
| 14 * window. | |
| 15 * 2. Scroll the text, the cursor is moved into the text visible in the | |
| 16 * window. | |
| 17 * The 'scrolloff' option makes this a bit complicated. | |
| 18 */ | |
| 19 | |
| 20 #include "vim.h" | |
| 21 | |
| 22 static void comp_botline __ARGS((win_T *wp)); | |
| 5764 | 23 static void redraw_for_cursorline __ARGS((win_T *wp)); |
| 532 | 24 static int scrolljump_value __ARGS((void)); |
| 7 | 25 static int check_top_offset __ARGS((void)); |
| 26 static void curs_rows __ARGS((win_T *wp, int do_botline)); | |
| 27 static void validate_botline_win __ARGS((win_T *wp)); | |
| 28 static void validate_cheight __ARGS((void)); | |
| 29 | |
| 30 typedef struct | |
| 31 { | |
| 32 linenr_T lnum; /* line number */ | |
| 33 #ifdef FEAT_DIFF | |
| 34 int fill; /* filler lines */ | |
| 35 #endif | |
| 36 int height; /* height of added line */ | |
| 37 } lineoff_T; | |
| 38 | |
| 39 static void topline_back __ARGS((lineoff_T *lp)); | |
| 40 static void botline_forw __ARGS((lineoff_T *lp)); | |
| 41 #ifdef FEAT_DIFF | |
| 42 static void botline_topline __ARGS((lineoff_T *lp)); | |
| 43 static void topline_botline __ARGS((lineoff_T *lp)); | |
| 44 static void max_topfill __ARGS((void)); | |
| 45 #endif | |
| 46 | |
| 47 /* | |
| 48 * Compute wp->w_botline for the current wp->w_topline. Can be called after | |
| 49 * wp->w_topline changed. | |
| 50 */ | |
| 51 static void | |
| 52 comp_botline(wp) | |
| 53 win_T *wp; | |
| 54 { | |
| 55 int n; | |
| 56 linenr_T lnum; | |
| 57 int done; | |
| 58 #ifdef FEAT_FOLDING | |
| 59 linenr_T last; | |
| 60 int folded; | |
| 61 #endif | |
| 62 | |
| 63 /* | |
| 64 * If w_cline_row is valid, start there. | |
| 65 * Otherwise have to start at w_topline. | |
| 66 */ | |
| 67 check_cursor_moved(wp); | |
| 68 if (wp->w_valid & VALID_CROW) | |
| 69 { | |
| 70 lnum = wp->w_cursor.lnum; | |
| 71 done = wp->w_cline_row; | |
| 72 } | |
| 73 else | |
| 74 { | |
| 75 lnum = wp->w_topline; | |
| 76 done = 0; | |
| 77 } | |
| 78 | |
| 79 for ( ; lnum <= wp->w_buffer->b_ml.ml_line_count; ++lnum) | |
| 80 { | |
| 81 #ifdef FEAT_FOLDING | |
| 82 last = lnum; | |
| 83 folded = FALSE; | |
| 84 if (hasFoldingWin(wp, lnum, NULL, &last, TRUE, NULL)) | |
| 85 { | |
| 86 n = 1; | |
| 87 folded = TRUE; | |
| 88 } | |
| 89 else | |
| 90 #endif | |
| 91 #ifdef FEAT_DIFF | |
| 92 if (lnum == wp->w_topline) | |
| 93 n = plines_win_nofill(wp, lnum, TRUE) + wp->w_topfill; | |
| 94 else | |
| 95 #endif | |
| 96 n = plines_win(wp, lnum, TRUE); | |
| 97 if ( | |
| 98 #ifdef FEAT_FOLDING | |
| 99 lnum <= wp->w_cursor.lnum && last >= wp->w_cursor.lnum | |
| 100 #else | |
| 101 lnum == wp->w_cursor.lnum | |
| 102 #endif | |
| 103 ) | |
| 104 { | |
| 105 wp->w_cline_row = done; | |
| 106 wp->w_cline_height = n; | |
| 107 #ifdef FEAT_FOLDING | |
| 108 wp->w_cline_folded = folded; | |
| 109 #endif | |
| 5764 | 110 redraw_for_cursorline(wp); |
| 7 | 111 wp->w_valid |= (VALID_CROW|VALID_CHEIGHT); |
| 112 } | |
| 113 if (done + n > wp->w_height) | |
| 114 break; | |
| 115 done += n; | |
| 116 #ifdef FEAT_FOLDING | |
| 117 lnum = last; | |
| 118 #endif | |
| 119 } | |
| 120 | |
| 121 /* wp->w_botline is the line that is just below the window */ | |
| 122 wp->w_botline = lnum; | |
| 123 wp->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP; | |
| 124 | |
| 125 set_empty_rows(wp, done); | |
| 126 } | |
| 127 | |
| 128 /* | |
| 5764 | 129 * Redraw when w_cline_row changes and 'relativenumber' or 'cursorline' is |
| 130 * set. | |
| 131 */ | |
| 132 static void | |
| 133 redraw_for_cursorline(wp) | |
| 134 win_T *wp; | |
| 135 { | |
| 136 if ((wp->w_p_rnu | |
| 137 #ifdef FEAT_SYN_HL | |
| 138 || wp->w_p_cul | |
| 139 #endif | |
| 140 ) | |
| 141 && (wp->w_valid & VALID_CROW) == 0 | |
| 142 # ifdef FEAT_INS_EXPAND | |
| 143 && !pum_visible() | |
| 144 # endif | |
| 145 ) | |
| 146 redraw_win_later(wp, SOME_VALID); | |
| 147 } | |
| 148 | |
| 149 /* | |
| 7 | 150 * Update curwin->w_topline and redraw if necessary. |
| 151 * Used to update the screen before printing a message. | |
| 152 */ | |
| 153 void | |
| 154 update_topline_redraw() | |
| 155 { | |
| 156 update_topline(); | |
| 157 if (must_redraw) | |
| 158 update_screen(0); | |
| 159 } | |
| 160 | |
| 161 /* | |
| 162 * Update curwin->w_topline to move the cursor onto the screen. | |
| 163 */ | |
| 164 void | |
| 165 update_topline() | |
| 166 { | |
| 167 long line_count; | |
| 168 int halfheight; | |
| 169 int n; | |
| 170 linenr_T old_topline; | |
| 171 #ifdef FEAT_DIFF | |
| 172 int old_topfill; | |
| 173 #endif | |
| 174 #ifdef FEAT_FOLDING | |
| 175 linenr_T lnum; | |
| 176 #endif | |
| 177 int check_topline = FALSE; | |
| 178 int check_botline = FALSE; | |
| 179 #ifdef FEAT_MOUSE | |
| 180 int save_so = p_so; | |
| 181 #endif | |
| 182 | |
| 183 if (!screen_valid(TRUE)) | |
| 184 return; | |
| 185 | |
| 6247 | 186 /* If the window height is zero just use the cursor line. */ |
| 187 if (curwin->w_height == 0) | |
| 188 { | |
| 189 curwin->w_topline = curwin->w_cursor.lnum; | |
| 190 curwin->w_botline = curwin->w_topline; | |
| 191 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP; | |
| 192 #ifdef FEAT_SCROLLBIND | |
| 193 curwin->w_scbind_pos = 1; | |
| 194 #endif | |
| 195 return; | |
| 196 } | |
| 197 | |
| 7 | 198 check_cursor_moved(curwin); |
| 199 if (curwin->w_valid & VALID_TOPLINE) | |
| 200 return; | |
| 201 | |
| 202 #ifdef FEAT_MOUSE | |
| 203 /* When dragging with the mouse, don't scroll that quickly */ | |
| 1121 | 204 if (mouse_dragging > 0) |
| 7 | 205 p_so = mouse_dragging - 1; |
| 206 #endif | |
| 207 | |
| 208 old_topline = curwin->w_topline; | |
| 209 #ifdef FEAT_DIFF | |
| 210 old_topfill = curwin->w_topfill; | |
| 211 #endif | |
| 212 | |
| 213 /* | |
| 214 * If the buffer is empty, always set topline to 1. | |
| 215 */ | |
| 216 if (bufempty()) /* special case - file is empty */ | |
| 217 { | |
| 218 if (curwin->w_topline != 1) | |
| 219 redraw_later(NOT_VALID); | |
| 220 curwin->w_topline = 1; | |
| 221 curwin->w_botline = 2; | |
| 222 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP; | |
| 223 #ifdef FEAT_SCROLLBIND | |
| 224 curwin->w_scbind_pos = 1; | |
| 225 #endif | |
| 226 } | |
| 227 | |
| 228 /* | |
| 229 * If the cursor is above or near the top of the window, scroll the window | |
| 230 * to show the line the cursor is in, with 'scrolloff' context. | |
| 231 */ | |
| 232 else | |
| 233 { | |
| 234 if (curwin->w_topline > 1) | |
| 235 { | |
| 236 /* If the cursor is above topline, scrolling is always needed. | |
| 237 * If the cursor is far below topline and there is no folding, | |
| 238 * scrolling down is never needed. */ | |
| 239 if (curwin->w_cursor.lnum < curwin->w_topline) | |
| 240 check_topline = TRUE; | |
| 241 else if (check_top_offset()) | |
| 242 check_topline = TRUE; | |
| 243 } | |
| 244 #ifdef FEAT_DIFF | |
| 245 /* Check if there are more filler lines than allowed. */ | |
| 246 if (!check_topline && curwin->w_topfill > diff_check_fill(curwin, | |
| 247 curwin->w_topline)) | |
| 248 check_topline = TRUE; | |
| 249 #endif | |
| 250 | |
| 251 if (check_topline) | |
| 252 { | |
| 253 halfheight = curwin->w_height / 2 - 1; | |
| 254 if (halfheight < 2) | |
| 255 halfheight = 2; | |
| 256 | |
| 257 #ifdef FEAT_FOLDING | |
| 258 if (hasAnyFolding(curwin)) | |
| 259 { | |
| 260 /* Count the number of logical lines between the cursor and | |
| 261 * topline + p_so (approximation of how much will be | |
| 262 * scrolled). */ | |
| 263 n = 0; | |
| 264 for (lnum = curwin->w_cursor.lnum; | |
| 265 lnum < curwin->w_topline + p_so; ++lnum) | |
| 266 { | |
| 267 ++n; | |
| 268 /* stop at end of file or when we know we are far off */ | |
| 269 if (lnum >= curbuf->b_ml.ml_line_count || n >= halfheight) | |
| 270 break; | |
| 271 (void)hasFolding(lnum, NULL, &lnum); | |
| 272 } | |
| 273 } | |
| 274 else | |
| 275 #endif | |
| 276 n = curwin->w_topline + p_so - curwin->w_cursor.lnum; | |
| 277 | |
| 278 /* If we weren't very close to begin with, we scroll to put the | |
| 279 * cursor in the middle of the window. Otherwise put the cursor | |
| 280 * near the top of the window. */ | |
| 281 if (n >= halfheight) | |
| 282 scroll_cursor_halfway(FALSE); | |
| 283 else | |
| 284 { | |
| 532 | 285 scroll_cursor_top(scrolljump_value(), FALSE); |
| 7 | 286 check_botline = TRUE; |
| 287 } | |
| 288 } | |
| 289 | |
| 290 else | |
| 291 { | |
| 292 #ifdef FEAT_FOLDING | |
| 293 /* Make sure topline is the first line of a fold. */ | |
| 294 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 295 #endif | |
| 296 check_botline = TRUE; | |
| 297 } | |
| 298 } | |
| 299 | |
| 300 /* | |
| 301 * If the cursor is below the bottom of the window, scroll the window | |
| 302 * to put the cursor on the window. | |
| 303 * When w_botline is invalid, recompute it first, to avoid a redraw later. | |
| 304 * If w_botline was approximated, we might need a redraw later in a few | |
| 305 * cases, but we don't want to spend (a lot of) time recomputing w_botline | |
| 306 * for every small change. | |
| 307 */ | |
| 308 if (check_botline) | |
| 309 { | |
| 310 if (!(curwin->w_valid & VALID_BOTLINE_AP)) | |
| 311 validate_botline(); | |
| 312 | |
| 313 if (curwin->w_botline <= curbuf->b_ml.ml_line_count) | |
| 314 { | |
| 1744 | 315 if (curwin->w_cursor.lnum < curwin->w_botline) |
| 316 { | |
| 317 if (((long)curwin->w_cursor.lnum | |
| 7 | 318 >= (long)curwin->w_botline - p_so |
| 319 #ifdef FEAT_FOLDING | |
| 320 || hasAnyFolding(curwin) | |
| 321 #endif | |
| 322 )) | |
| 1744 | 323 { |
| 7 | 324 lineoff_T loff; |
| 325 | |
| 1744 | 326 /* Cursor is (a few lines) above botline, check if there are |
| 327 * 'scrolloff' window lines below the cursor. If not, need to | |
| 328 * scroll. */ | |
| 7 | 329 n = curwin->w_empty_rows; |
| 330 loff.lnum = curwin->w_cursor.lnum; | |
| 331 #ifdef FEAT_FOLDING | |
| 332 /* In a fold go to its last line. */ | |
| 333 (void)hasFolding(loff.lnum, NULL, &loff.lnum); | |
| 334 #endif | |
| 335 #ifdef FEAT_DIFF | |
| 336 loff.fill = 0; | |
| 337 n += curwin->w_filler_rows; | |
| 338 #endif | |
| 339 loff.height = 0; | |
| 340 while (loff.lnum < curwin->w_botline | |
| 341 #ifdef FEAT_DIFF | |
| 342 && (loff.lnum + 1 < curwin->w_botline || loff.fill == 0) | |
| 343 #endif | |
| 344 ) | |
| 345 { | |
| 346 n += loff.height; | |
| 347 if (n >= p_so) | |
| 348 break; | |
| 349 botline_forw(&loff); | |
| 350 } | |
| 351 if (n >= p_so) | |
| 352 /* sufficient context, no need to scroll */ | |
| 353 check_botline = FALSE; | |
| 1744 | 354 } |
| 355 else | |
| 356 /* sufficient context, no need to scroll */ | |
| 357 check_botline = FALSE; | |
| 7 | 358 } |
| 359 if (check_botline) | |
| 360 { | |
| 361 #ifdef FEAT_FOLDING | |
| 362 if (hasAnyFolding(curwin)) | |
| 363 { | |
| 364 /* Count the number of logical lines between the cursor and | |
| 365 * botline - p_so (approximation of how much will be | |
| 366 * scrolled). */ | |
| 367 line_count = 0; | |
| 368 for (lnum = curwin->w_cursor.lnum; | |
| 369 lnum >= curwin->w_botline - p_so; --lnum) | |
| 370 { | |
| 371 ++line_count; | |
| 372 /* stop at end of file or when we know we are far off */ | |
| 373 if (lnum <= 0 || line_count > curwin->w_height + 1) | |
| 374 break; | |
| 375 (void)hasFolding(lnum, &lnum, NULL); | |
| 376 } | |
| 377 } | |
| 378 else | |
| 379 #endif | |
| 380 line_count = curwin->w_cursor.lnum - curwin->w_botline | |
| 381 + 1 + p_so; | |
| 382 if (line_count <= curwin->w_height + 1) | |
| 532 | 383 scroll_cursor_bot(scrolljump_value(), FALSE); |
| 7 | 384 else |
| 385 scroll_cursor_halfway(FALSE); | |
| 386 } | |
| 387 } | |
| 388 } | |
| 389 curwin->w_valid |= VALID_TOPLINE; | |
| 390 | |
| 391 /* | |
| 392 * Need to redraw when topline changed. | |
| 393 */ | |
| 394 if (curwin->w_topline != old_topline | |
| 395 #ifdef FEAT_DIFF | |
| 396 || curwin->w_topfill != old_topfill | |
| 397 #endif | |
| 398 ) | |
| 399 { | |
| 3318 | 400 dollar_vcol = -1; |
| 740 | 401 if (curwin->w_skipcol != 0) |
| 7 | 402 { |
| 403 curwin->w_skipcol = 0; | |
| 404 redraw_later(NOT_VALID); | |
| 405 } | |
| 406 else | |
| 407 redraw_later(VALID); | |
| 408 /* May need to set w_skipcol when cursor in w_topline. */ | |
| 409 if (curwin->w_cursor.lnum == curwin->w_topline) | |
| 410 validate_cursor(); | |
| 411 } | |
| 412 | |
| 413 #ifdef FEAT_MOUSE | |
| 414 p_so = save_so; | |
| 415 #endif | |
| 416 } | |
| 417 | |
| 418 /* | |
| 532 | 419 * Return the scrolljump value to use for the current window. |
| 420 * When 'scrolljump' is positive use it as-is. | |
| 421 * When 'scrolljump' is negative use it as a percentage of the window height. | |
| 422 */ | |
| 423 static int | |
| 424 scrolljump_value() | |
| 425 { | |
| 426 if (p_sj >= 0) | |
| 427 return (int)p_sj; | |
| 428 return (curwin->w_height * -p_sj) / 100; | |
| 429 } | |
| 430 | |
| 431 /* | |
| 7 | 432 * Return TRUE when there are not 'scrolloff' lines above the cursor for the |
| 433 * current window. | |
| 434 */ | |
| 435 static int | |
| 436 check_top_offset() | |
| 437 { | |
| 438 lineoff_T loff; | |
| 439 int n; | |
| 440 | |
| 441 if (curwin->w_cursor.lnum < curwin->w_topline + p_so | |
| 442 #ifdef FEAT_FOLDING | |
| 443 || hasAnyFolding(curwin) | |
| 444 #endif | |
| 445 ) | |
| 446 { | |
| 447 loff.lnum = curwin->w_cursor.lnum; | |
| 448 #ifdef FEAT_DIFF | |
| 449 loff.fill = 0; | |
| 450 n = curwin->w_topfill; /* always have this context */ | |
| 451 #else | |
| 452 n = 0; | |
| 453 #endif | |
| 454 /* Count the visible screen lines above the cursor line. */ | |
| 455 while (n < p_so) | |
| 456 { | |
| 457 topline_back(&loff); | |
| 458 /* Stop when included a line above the window. */ | |
| 459 if (loff.lnum < curwin->w_topline | |
| 460 #ifdef FEAT_DIFF | |
| 461 || (loff.lnum == curwin->w_topline && loff.fill > 0) | |
| 462 #endif | |
| 463 ) | |
| 464 break; | |
| 465 n += loff.height; | |
| 466 } | |
| 467 if (n < p_so) | |
| 468 return TRUE; | |
| 469 } | |
| 470 return FALSE; | |
| 471 } | |
| 472 | |
| 473 void | |
| 474 update_curswant() | |
| 475 { | |
| 476 if (curwin->w_set_curswant) | |
| 477 { | |
| 478 validate_virtcol(); | |
| 479 curwin->w_curswant = curwin->w_virtcol; | |
| 480 curwin->w_set_curswant = FALSE; | |
| 481 } | |
| 482 } | |
| 483 | |
| 484 /* | |
| 485 * Check if the cursor has moved. Set the w_valid flag accordingly. | |
| 486 */ | |
| 487 void | |
| 488 check_cursor_moved(wp) | |
| 489 win_T *wp; | |
| 490 { | |
| 491 if (wp->w_cursor.lnum != wp->w_valid_cursor.lnum) | |
| 492 { | |
| 493 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL | |
| 494 |VALID_CHEIGHT|VALID_CROW|VALID_TOPLINE); | |
| 495 wp->w_valid_cursor = wp->w_cursor; | |
| 496 wp->w_valid_leftcol = wp->w_leftcol; | |
| 497 } | |
| 498 else if (wp->w_cursor.col != wp->w_valid_cursor.col | |
| 499 || wp->w_leftcol != wp->w_valid_leftcol | |
| 500 #ifdef FEAT_VIRTUALEDIT | |
| 501 || wp->w_cursor.coladd != wp->w_valid_cursor.coladd | |
| 502 #endif | |
| 503 ) | |
| 504 { | |
| 505 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL); | |
| 506 wp->w_valid_cursor.col = wp->w_cursor.col; | |
| 507 wp->w_valid_leftcol = wp->w_leftcol; | |
| 508 #ifdef FEAT_VIRTUALEDIT | |
| 509 wp->w_valid_cursor.coladd = wp->w_cursor.coladd; | |
| 510 #endif | |
| 511 } | |
| 512 } | |
| 513 | |
| 514 /* | |
| 515 * Call this function when some window settings have changed, which require | |
| 516 * the cursor position, botline and topline to be recomputed and the window to | |
| 517 * be redrawn. E.g, when changing the 'wrap' option or folding. | |
| 518 */ | |
| 519 void | |
| 520 changed_window_setting() | |
| 521 { | |
| 522 changed_window_setting_win(curwin); | |
| 523 } | |
| 524 | |
| 525 void | |
| 526 changed_window_setting_win(wp) | |
| 527 win_T *wp; | |
| 528 { | |
| 529 wp->w_lines_valid = 0; | |
| 530 changed_line_abv_curs_win(wp); | |
| 531 wp->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP|VALID_TOPLINE); | |
| 532 redraw_win_later(wp, NOT_VALID); | |
| 533 } | |
| 534 | |
| 535 /* | |
| 536 * Set wp->w_topline to a certain number. | |
| 537 */ | |
| 538 void | |
| 539 set_topline(wp, lnum) | |
| 540 win_T *wp; | |
| 541 linenr_T lnum; | |
| 542 { | |
| 543 #ifdef FEAT_FOLDING | |
| 544 /* go to first of folded lines */ | |
| 545 (void)hasFoldingWin(wp, lnum, &lnum, NULL, TRUE, NULL); | |
| 546 #endif | |
| 547 /* Approximate the value of w_botline */ | |
| 548 wp->w_botline += lnum - wp->w_topline; | |
| 549 wp->w_topline = lnum; | |
| 1744 | 550 #ifdef FEAT_AUTOCMD |
| 551 wp->w_topline_was_set = TRUE; | |
| 552 #endif | |
| 7 | 553 #ifdef FEAT_DIFF |
| 554 wp->w_topfill = 0; | |
| 555 #endif | |
| 556 wp->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_TOPLINE); | |
| 557 /* Don't set VALID_TOPLINE here, 'scrolloff' needs to be checked. */ | |
| 558 redraw_later(VALID); | |
| 559 } | |
| 560 | |
| 561 /* | |
| 562 * Call this function when the length of the cursor line (in screen | |
| 563 * characters) has changed, and the change is before the cursor. | |
| 564 * Need to take care of w_botline separately! | |
| 565 */ | |
| 566 void | |
| 567 changed_cline_bef_curs() | |
| 568 { | |
| 569 curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL | |
| 570 |VALID_CHEIGHT|VALID_TOPLINE); | |
| 571 } | |
| 572 | |
| 573 void | |
| 574 changed_cline_bef_curs_win(wp) | |
| 575 win_T *wp; | |
| 576 { | |
| 577 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL | |
| 578 |VALID_CHEIGHT|VALID_TOPLINE); | |
| 579 } | |
| 580 | |
| 581 /* | |
| 582 * Call this function when the length of a line (in screen characters) above | |
| 583 * the cursor have changed. | |
| 584 * Need to take care of w_botline separately! | |
| 585 */ | |
| 586 void | |
| 587 changed_line_abv_curs() | |
| 588 { | |
| 589 curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW | |
| 590 |VALID_CHEIGHT|VALID_TOPLINE); | |
| 591 } | |
| 592 | |
| 593 void | |
| 594 changed_line_abv_curs_win(wp) | |
| 595 win_T *wp; | |
| 596 { | |
| 597 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW | |
| 598 |VALID_CHEIGHT|VALID_TOPLINE); | |
| 599 } | |
| 600 | |
| 601 /* | |
| 602 * Make sure the value of curwin->w_botline is valid. | |
| 603 */ | |
| 604 void | |
| 605 validate_botline() | |
| 606 { | |
| 607 if (!(curwin->w_valid & VALID_BOTLINE)) | |
| 608 comp_botline(curwin); | |
| 609 } | |
| 610 | |
| 611 /* | |
| 612 * Make sure the value of wp->w_botline is valid. | |
| 613 */ | |
| 614 static void | |
| 615 validate_botline_win(wp) | |
| 616 win_T *wp; | |
| 617 { | |
| 618 if (!(wp->w_valid & VALID_BOTLINE)) | |
| 619 comp_botline(wp); | |
| 620 } | |
| 621 | |
| 622 /* | |
| 623 * Mark curwin->w_botline as invalid (because of some change in the buffer). | |
| 624 */ | |
| 625 void | |
| 626 invalidate_botline() | |
| 627 { | |
| 628 curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 629 } | |
| 630 | |
| 631 void | |
| 632 invalidate_botline_win(wp) | |
| 633 win_T *wp; | |
| 634 { | |
| 635 wp->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 636 } | |
| 637 | |
| 638 void | |
| 639 approximate_botline_win(wp) | |
| 640 win_T *wp; | |
| 641 { | |
| 642 wp->w_valid &= ~VALID_BOTLINE; | |
| 643 } | |
| 644 | |
| 645 /* | |
| 646 * Return TRUE if curwin->w_wrow and curwin->w_wcol are valid. | |
| 647 */ | |
| 648 int | |
| 649 cursor_valid() | |
| 650 { | |
| 651 check_cursor_moved(curwin); | |
| 652 return ((curwin->w_valid & (VALID_WROW|VALID_WCOL)) == | |
| 653 (VALID_WROW|VALID_WCOL)); | |
| 654 } | |
| 655 | |
| 656 /* | |
| 657 * Validate cursor position. Makes sure w_wrow and w_wcol are valid. | |
| 658 * w_topline must be valid, you may need to call update_topline() first! | |
| 659 */ | |
| 660 void | |
| 661 validate_cursor() | |
| 662 { | |
| 663 check_cursor_moved(curwin); | |
| 664 if ((curwin->w_valid & (VALID_WCOL|VALID_WROW)) != (VALID_WCOL|VALID_WROW)) | |
| 665 curs_columns(TRUE); | |
| 666 } | |
| 667 | |
| 668 #if defined(FEAT_GUI) || defined(PROTO) | |
| 669 /* | |
| 670 * validate w_cline_row. | |
| 671 */ | |
| 672 void | |
| 673 validate_cline_row() | |
| 674 { | |
| 675 /* | |
| 676 * First make sure that w_topline is valid (after moving the cursor). | |
| 677 */ | |
| 678 update_topline(); | |
| 679 check_cursor_moved(curwin); | |
| 680 if (!(curwin->w_valid & VALID_CROW)) | |
| 681 curs_rows(curwin, FALSE); | |
| 682 } | |
| 683 #endif | |
| 684 | |
| 685 /* | |
| 686 * Compute wp->w_cline_row and wp->w_cline_height, based on the current value | |
|
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|
687 * of wp->w_topline. |
| 7 | 688 * |
| 689 * Returns OK when cursor is in the window, FAIL when it isn't. | |
| 690 */ | |
| 691 static void | |
| 692 curs_rows(wp, do_botline) | |
| 693 win_T *wp; | |
| 694 int do_botline; /* also compute w_botline */ | |
| 695 { | |
| 696 linenr_T lnum; | |
| 697 int i; | |
| 698 int all_invalid; | |
| 699 int valid; | |
| 700 #ifdef FEAT_FOLDING | |
| 701 long fold_count; | |
| 702 #endif | |
| 703 | |
| 704 /* Check if wp->w_lines[].wl_size is invalid */ | |
| 705 all_invalid = (!redrawing() | |
| 706 || wp->w_lines_valid == 0 | |
| 707 || wp->w_lines[0].wl_lnum > wp->w_topline); | |
| 708 i = 0; | |
| 709 wp->w_cline_row = 0; | |
| 710 for (lnum = wp->w_topline; lnum < wp->w_cursor.lnum; ++i) | |
| 711 { | |
| 712 valid = FALSE; | |
| 713 if (!all_invalid && i < wp->w_lines_valid) | |
| 714 { | |
| 715 if (wp->w_lines[i].wl_lnum < lnum || !wp->w_lines[i].wl_valid) | |
| 716 continue; /* skip changed or deleted lines */ | |
| 717 if (wp->w_lines[i].wl_lnum == lnum) | |
| 718 { | |
| 719 #ifdef FEAT_FOLDING | |
| 720 /* Check for newly inserted lines below this row, in which | |
| 721 * case we need to check for folded lines. */ | |
| 722 if (!wp->w_buffer->b_mod_set | |
| 723 || wp->w_lines[i].wl_lastlnum < wp->w_cursor.lnum | |
| 724 || wp->w_buffer->b_mod_top | |
| 725 > wp->w_lines[i].wl_lastlnum + 1) | |
| 726 #endif | |
| 727 valid = TRUE; | |
| 728 } | |
| 729 else if (wp->w_lines[i].wl_lnum > lnum) | |
| 730 --i; /* hold at inserted lines */ | |
| 731 } | |
| 732 if (valid | |
| 733 #ifdef FEAT_DIFF | |
| 734 && (lnum != wp->w_topline || !wp->w_p_diff) | |
| 735 #endif | |
| 736 ) | |
| 737 { | |
| 738 #ifdef FEAT_FOLDING | |
| 739 lnum = wp->w_lines[i].wl_lastlnum + 1; | |
| 740 /* Cursor inside folded lines, don't count this row */ | |
| 741 if (lnum > wp->w_cursor.lnum) | |
| 742 break; | |
| 743 #else | |
| 744 ++lnum; | |
| 745 #endif | |
| 746 wp->w_cline_row += wp->w_lines[i].wl_size; | |
| 747 } | |
| 748 else | |
| 749 { | |
| 750 #ifdef FEAT_FOLDING | |
| 751 fold_count = foldedCount(wp, lnum, NULL); | |
| 752 if (fold_count) | |
| 753 { | |
| 754 lnum += fold_count; | |
| 755 if (lnum > wp->w_cursor.lnum) | |
| 756 break; | |
| 757 ++wp->w_cline_row; | |
| 758 } | |
| 759 else | |
| 760 #endif | |
| 761 #ifdef FEAT_DIFF | |
| 762 if (lnum == wp->w_topline) | |
| 763 wp->w_cline_row += plines_win_nofill(wp, lnum++, TRUE) | |
| 764 + wp->w_topfill; | |
| 765 else | |
| 766 #endif | |
| 767 wp->w_cline_row += plines_win(wp, lnum++, TRUE); | |
| 768 } | |
| 769 } | |
| 770 | |
| 771 check_cursor_moved(wp); | |
| 772 if (!(wp->w_valid & VALID_CHEIGHT)) | |
| 773 { | |
| 774 if (all_invalid | |
| 775 || i == wp->w_lines_valid | |
| 776 || (i < wp->w_lines_valid | |
| 777 && (!wp->w_lines[i].wl_valid | |
| 778 || wp->w_lines[i].wl_lnum != wp->w_cursor.lnum))) | |
| 779 { | |
| 780 #ifdef FEAT_DIFF | |
| 781 if (wp->w_cursor.lnum == wp->w_topline) | |
| 782 wp->w_cline_height = plines_win_nofill(wp, wp->w_cursor.lnum, | |
| 783 TRUE) + wp->w_topfill; | |
| 784 else | |
| 785 #endif | |
| 786 wp->w_cline_height = plines_win(wp, wp->w_cursor.lnum, TRUE); | |
| 787 #ifdef FEAT_FOLDING | |
| 788 wp->w_cline_folded = hasFoldingWin(wp, wp->w_cursor.lnum, | |
| 789 NULL, NULL, TRUE, NULL); | |
| 790 #endif | |
| 791 } | |
| 792 else if (i > wp->w_lines_valid) | |
| 793 { | |
| 794 /* a line that is too long to fit on the last screen line */ | |
| 795 wp->w_cline_height = 0; | |
| 796 #ifdef FEAT_FOLDING | |
| 797 wp->w_cline_folded = hasFoldingWin(wp, wp->w_cursor.lnum, | |
| 798 NULL, NULL, TRUE, NULL); | |
| 799 #endif | |
| 800 } | |
| 801 else | |
| 802 { | |
| 803 wp->w_cline_height = wp->w_lines[i].wl_size; | |
| 804 #ifdef FEAT_FOLDING | |
| 805 wp->w_cline_folded = wp->w_lines[i].wl_folded; | |
| 806 #endif | |
| 807 } | |
| 808 } | |
| 809 | |
| 5764 | 810 redraw_for_cursorline(curwin); |
| 7 | 811 wp->w_valid |= VALID_CROW|VALID_CHEIGHT; |
| 812 | |
| 813 /* validate botline too, if update_screen doesn't do it */ | |
| 814 if (do_botline && all_invalid) | |
| 815 validate_botline_win(wp); | |
| 816 } | |
| 817 | |
| 818 /* | |
| 819 * Validate curwin->w_virtcol only. | |
| 820 */ | |
| 821 void | |
| 822 validate_virtcol() | |
| 823 { | |
| 824 validate_virtcol_win(curwin); | |
| 825 } | |
| 826 | |
| 827 /* | |
| 828 * Validate wp->w_virtcol only. | |
| 829 */ | |
| 830 void | |
| 831 validate_virtcol_win(wp) | |
| 832 win_T *wp; | |
| 833 { | |
| 834 check_cursor_moved(wp); | |
| 835 if (!(wp->w_valid & VALID_VIRTCOL)) | |
| 836 { | |
| 837 getvvcol(wp, &wp->w_cursor, NULL, &(wp->w_virtcol), NULL); | |
| 838 wp->w_valid |= VALID_VIRTCOL; | |
| 740 | 839 #ifdef FEAT_SYN_HL |
| 752 | 840 if (wp->w_p_cuc |
| 841 # ifdef FEAT_INS_EXPAND | |
| 842 && !pum_visible() | |
| 843 # endif | |
| 844 ) | |
| 740 | 845 redraw_win_later(wp, SOME_VALID); |
| 846 #endif | |
| 7 | 847 } |
| 848 } | |
| 849 | |
| 850 /* | |
| 851 * Validate curwin->w_cline_height only. | |
| 852 */ | |
| 853 static void | |
| 854 validate_cheight() | |
| 855 { | |
| 856 check_cursor_moved(curwin); | |
| 857 if (!(curwin->w_valid & VALID_CHEIGHT)) | |
| 858 { | |
| 859 #ifdef FEAT_DIFF | |
| 860 if (curwin->w_cursor.lnum == curwin->w_topline) | |
| 861 curwin->w_cline_height = plines_nofill(curwin->w_cursor.lnum) | |
| 862 + curwin->w_topfill; | |
| 863 else | |
| 864 #endif | |
| 865 curwin->w_cline_height = plines(curwin->w_cursor.lnum); | |
| 866 #ifdef FEAT_FOLDING | |
| 867 curwin->w_cline_folded = hasFolding(curwin->w_cursor.lnum, NULL, NULL); | |
| 868 #endif | |
| 869 curwin->w_valid |= VALID_CHEIGHT; | |
| 870 } | |
| 871 } | |
| 872 | |
| 873 /* | |
| 1668 | 874 * Validate w_wcol and w_virtcol only. |
| 7 | 875 */ |
| 876 void | |
| 877 validate_cursor_col() | |
| 878 { | |
| 879 colnr_T off; | |
| 880 colnr_T col; | |
|
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diff
changeset
|
881 int width; |
| 7 | 882 |
| 883 validate_virtcol(); | |
| 884 if (!(curwin->w_valid & VALID_WCOL)) | |
| 885 { | |
| 886 col = curwin->w_virtcol; | |
| 887 off = curwin_col_off(); | |
| 888 col += off; | |
|
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diff
changeset
|
889 width = W_WIDTH(curwin) - off + curwin_col_off2(); |
| 7 | 890 |
| 891 /* long line wrapping, adjust curwin->w_wrow */ | |
| 1668 | 892 if (curwin->w_p_wrap |
| 893 && col >= (colnr_T)W_WIDTH(curwin) | |
|
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diff
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|
894 && width > 0) |
|
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parents:
1980
diff
changeset
|
895 /* use same formula as what is used in curs_columns() */ |
|
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diff
changeset
|
896 col -= ((col - W_WIDTH(curwin)) / width + 1) * width; |
| 1668 | 897 if (col > (int)curwin->w_leftcol) |
| 898 col -= curwin->w_leftcol; | |
| 899 else | |
| 900 col = 0; | |
| 7 | 901 curwin->w_wcol = col; |
| 1668 | 902 |
| 7 | 903 curwin->w_valid |= VALID_WCOL; |
| 904 } | |
| 905 } | |
| 906 | |
| 907 /* | |
|
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parents:
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diff
changeset
|
908 * Compute offset of a window, occupied by absolute or relative line number, |
|
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parents:
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|
909 * fold column and sign column (these don't move when scrolling horizontally). |
| 7 | 910 */ |
| 911 int | |
| 912 win_col_off(wp) | |
| 913 win_T *wp; | |
| 914 { | |
|
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parents:
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diff
changeset
|
915 return (((wp->w_p_nu || wp->w_p_rnu) ? number_width(wp) + 1 : 0) |
| 7 | 916 #ifdef FEAT_CMDWIN |
| 917 + (cmdwin_type == 0 || wp != curwin ? 0 : 1) | |
| 918 #endif | |
| 919 #ifdef FEAT_FOLDING | |
| 920 + wp->w_p_fdc | |
| 921 #endif | |
| 922 #ifdef FEAT_SIGNS | |
| 923 + ( | |
| 924 # ifdef FEAT_NETBEANS_INTG | |
| 2210 | 925 /* show glyph gutter in netbeans */ |
| 926 netbeans_active() || | |
| 7 | 927 # endif |
| 928 wp->w_buffer->b_signlist != NULL ? 2 : 0) | |
| 929 #endif | |
| 930 ); | |
| 931 } | |
| 932 | |
| 933 int | |
| 934 curwin_col_off() | |
| 935 { | |
| 936 return win_col_off(curwin); | |
| 937 } | |
| 938 | |
| 939 /* | |
| 940 * Return the difference in column offset for the second screen line of a | |
|
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parents:
2154
diff
changeset
|
941 * wrapped line. It's 8 if 'number' or 'relativenumber' is on and 'n' is in |
|
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2154
diff
changeset
|
942 * 'cpoptions'. |
| 7 | 943 */ |
| 944 int | |
| 945 win_col_off2(wp) | |
| 946 win_T *wp; | |
| 947 { | |
|
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2154
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changeset
|
948 if ((wp->w_p_nu || wp->w_p_rnu) && vim_strchr(p_cpo, CPO_NUMCOL) != NULL) |
| 13 | 949 return number_width(wp) + 1; |
| 7 | 950 return 0; |
| 951 } | |
| 952 | |
| 953 int | |
| 954 curwin_col_off2() | |
| 955 { | |
| 956 return win_col_off2(curwin); | |
| 957 } | |
| 958 | |
| 959 /* | |
| 960 * compute curwin->w_wcol and curwin->w_virtcol. | |
| 961 * Also updates curwin->w_wrow and curwin->w_cline_row. | |
| 962 * Also updates curwin->w_leftcol. | |
| 963 */ | |
| 964 void | |
| 3263 | 965 curs_columns(may_scroll) |
| 966 int may_scroll; /* when TRUE, may scroll horizontally */ | |
| 7 | 967 { |
| 968 int diff; | |
| 969 int extra; /* offset for first screen line */ | |
| 970 int off_left, off_right; | |
| 971 int n; | |
| 972 int p_lines; | |
| 973 int width = 0; | |
| 974 int textwidth; | |
| 975 int new_leftcol; | |
| 976 colnr_T startcol; | |
| 977 colnr_T endcol; | |
| 978 colnr_T prev_skipcol; | |
| 979 | |
| 980 /* | |
| 981 * First make sure that w_topline is valid (after moving the cursor). | |
| 982 */ | |
| 983 update_topline(); | |
| 984 | |
| 985 /* | |
| 986 * Next make sure that w_cline_row is valid. | |
| 987 */ | |
| 988 if (!(curwin->w_valid & VALID_CROW)) | |
| 989 curs_rows(curwin, FALSE); | |
| 990 | |
| 991 /* | |
| 992 * Compute the number of virtual columns. | |
| 993 */ | |
| 994 #ifdef FEAT_FOLDING | |
| 995 if (curwin->w_cline_folded) | |
| 996 /* In a folded line the cursor is always in the first column */ | |
| 997 startcol = curwin->w_virtcol = endcol = curwin->w_leftcol; | |
| 998 else | |
| 999 #endif | |
| 1000 getvvcol(curwin, &curwin->w_cursor, | |
| 1001 &startcol, &(curwin->w_virtcol), &endcol); | |
| 1002 | |
| 1003 /* remove '$' from change command when cursor moves onto it */ | |
| 1004 if (startcol > dollar_vcol) | |
| 3318 | 1005 dollar_vcol = -1; |
| 7 | 1006 |
| 1007 extra = curwin_col_off(); | |
| 1008 curwin->w_wcol = curwin->w_virtcol + extra; | |
| 1009 endcol += extra; | |
| 1010 | |
| 1011 /* | |
| 1012 * Now compute w_wrow, counting screen lines from w_cline_row. | |
| 1013 */ | |
| 1014 curwin->w_wrow = curwin->w_cline_row; | |
| 1015 | |
| 1016 textwidth = W_WIDTH(curwin) - extra; | |
| 1017 if (textwidth <= 0) | |
| 1018 { | |
| 1019 /* No room for text, put cursor in last char of window. */ | |
| 1020 curwin->w_wcol = W_WIDTH(curwin) - 1; | |
| 1021 curwin->w_wrow = curwin->w_height - 1; | |
| 1022 } | |
| 1023 else if (curwin->w_p_wrap | |
| 1024 #ifdef FEAT_VERTSPLIT | |
| 1025 && curwin->w_width != 0 | |
| 1026 #endif | |
| 1027 ) | |
| 1028 { | |
| 1029 width = textwidth + curwin_col_off2(); | |
| 1030 | |
| 1031 /* long line wrapping, adjust curwin->w_wrow */ | |
| 1032 if (curwin->w_wcol >= W_WIDTH(curwin)) | |
| 1033 { | |
|
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diff
changeset
|
1034 /* this same formula is used in validate_cursor_col() */ |
| 7 | 1035 n = (curwin->w_wcol - W_WIDTH(curwin)) / width + 1; |
| 1036 curwin->w_wcol -= n * width; | |
| 1037 curwin->w_wrow += n; | |
| 1038 | |
| 1039 #ifdef FEAT_LINEBREAK | |
| 1040 /* When cursor wraps to first char of next line in Insert | |
| 1041 * mode, the 'showbreak' string isn't shown, backup to first | |
| 1042 * column */ | |
| 1043 if (*p_sbr && *ml_get_cursor() == NUL | |
| 1044 && curwin->w_wcol == (int)vim_strsize(p_sbr)) | |
| 1045 curwin->w_wcol = 0; | |
| 1046 #endif | |
| 1047 } | |
| 1048 } | |
| 1049 | |
| 1050 /* No line wrapping: compute curwin->w_leftcol if scrolling is on and line | |
| 1051 * is not folded. | |
| 1052 * If scrolling is off, curwin->w_leftcol is assumed to be 0 */ | |
| 3263 | 1053 else if (may_scroll |
| 7 | 1054 #ifdef FEAT_FOLDING |
| 1055 && !curwin->w_cline_folded | |
| 1056 #endif | |
| 1057 ) | |
| 1058 { | |
| 1059 /* | |
| 1060 * If Cursor is left of the screen, scroll rightwards. | |
| 1061 * If Cursor is right of the screen, scroll leftwards | |
| 1062 * If we get closer to the edge than 'sidescrolloff', scroll a little | |
| 1063 * extra | |
| 1064 */ | |
| 1065 off_left = (int)startcol - (int)curwin->w_leftcol - p_siso; | |
| 1066 off_right = (int)endcol - (int)(curwin->w_leftcol + W_WIDTH(curwin) | |
| 1067 - p_siso) + 1; | |
| 1068 if (off_left < 0 || off_right > 0) | |
| 1069 { | |
| 1070 if (off_left < 0) | |
| 1071 diff = -off_left; | |
| 1072 else | |
| 1073 diff = off_right; | |
| 1074 | |
| 1075 /* When far off or not enough room on either side, put cursor in | |
| 1076 * middle of window. */ | |
| 1077 if (p_ss == 0 || diff >= textwidth / 2 || off_right >= off_left) | |
| 1078 new_leftcol = curwin->w_wcol - extra - textwidth / 2; | |
| 1079 else | |
| 1080 { | |
| 1081 if (diff < p_ss) | |
| 1082 diff = p_ss; | |
| 1083 if (off_left < 0) | |
| 1084 new_leftcol = curwin->w_leftcol - diff; | |
| 1085 else | |
| 1086 new_leftcol = curwin->w_leftcol + diff; | |
| 1087 } | |
| 1088 if (new_leftcol < 0) | |
| 1089 new_leftcol = 0; | |
| 1090 if (new_leftcol != (int)curwin->w_leftcol) | |
| 1091 { | |
| 1092 curwin->w_leftcol = new_leftcol; | |
| 1093 /* screen has to be redrawn with new curwin->w_leftcol */ | |
| 1094 redraw_later(NOT_VALID); | |
| 1095 } | |
| 1096 } | |
| 1097 curwin->w_wcol -= curwin->w_leftcol; | |
| 1098 } | |
| 1099 else if (curwin->w_wcol > (int)curwin->w_leftcol) | |
| 1100 curwin->w_wcol -= curwin->w_leftcol; | |
| 1101 else | |
| 1102 curwin->w_wcol = 0; | |
| 1103 | |
| 1104 #ifdef FEAT_DIFF | |
| 1105 /* Skip over filler lines. At the top use w_topfill, there | |
| 1106 * may be some filler lines above the window. */ | |
| 1107 if (curwin->w_cursor.lnum == curwin->w_topline) | |
| 1108 curwin->w_wrow += curwin->w_topfill; | |
| 1109 else | |
| 1110 curwin->w_wrow += diff_check_fill(curwin, curwin->w_cursor.lnum); | |
| 1111 #endif | |
| 1112 | |
| 1113 prev_skipcol = curwin->w_skipcol; | |
| 1114 | |
| 1115 p_lines = 0; | |
| 1116 if ((curwin->w_wrow >= curwin->w_height | |
| 1117 || ((prev_skipcol > 0 | |
| 1118 || curwin->w_wrow + p_so >= curwin->w_height) | |
| 1119 && (p_lines = | |
| 1120 #ifdef FEAT_DIFF | |
| 1121 plines_win_nofill | |
| 1122 #else | |
| 1123 plines_win | |
| 1124 #endif | |
| 1125 (curwin, curwin->w_cursor.lnum, FALSE)) | |
| 1126 - 1 >= curwin->w_height)) | |
| 1127 && curwin->w_height != 0 | |
| 1128 && curwin->w_cursor.lnum == curwin->w_topline | |
| 1129 && width > 0 | |
| 1130 #ifdef FEAT_VERTSPLIT | |
| 1131 && curwin->w_width != 0 | |
| 1132 #endif | |
| 1133 ) | |
| 1134 { | |
| 1135 /* Cursor past end of screen. Happens with a single line that does | |
| 1136 * not fit on screen. Find a skipcol to show the text around the | |
| 1137 * cursor. Avoid scrolling all the time. compute value of "extra": | |
| 1138 * 1: Less than "p_so" lines above | |
| 1139 * 2: Less than "p_so" lines below | |
| 1140 * 3: both of them */ | |
| 1141 extra = 0; | |
| 1142 if (curwin->w_skipcol + p_so * width > curwin->w_virtcol) | |
| 1143 extra = 1; | |
| 1144 /* Compute last display line of the buffer line that we want at the | |
| 1145 * bottom of the window. */ | |
| 1146 if (p_lines == 0) | |
| 1147 p_lines = plines_win(curwin, curwin->w_cursor.lnum, FALSE); | |
| 1148 --p_lines; | |
| 1149 if (p_lines > curwin->w_wrow + p_so) | |
| 1150 n = curwin->w_wrow + p_so; | |
| 1151 else | |
| 1152 n = p_lines; | |
| 1153 if ((colnr_T)n >= curwin->w_height + curwin->w_skipcol / width) | |
| 1154 extra += 2; | |
| 1155 | |
| 1156 if (extra == 3 || p_lines < p_so * 2) | |
| 1157 { | |
| 1158 /* not enough room for 'scrolloff', put cursor in the middle */ | |
| 1159 n = curwin->w_virtcol / width; | |
| 1160 if (n > curwin->w_height / 2) | |
| 1161 n -= curwin->w_height / 2; | |
| 1162 else | |
| 1163 n = 0; | |
| 1164 /* don't skip more than necessary */ | |
| 1165 if (n > p_lines - curwin->w_height + 1) | |
| 1166 n = p_lines - curwin->w_height + 1; | |
| 1167 curwin->w_skipcol = n * width; | |
| 1168 } | |
| 1169 else if (extra == 1) | |
| 1170 { | |
| 1171 /* less then 'scrolloff' lines above, decrease skipcol */ | |
| 1172 extra = (curwin->w_skipcol + p_so * width - curwin->w_virtcol | |
| 1173 + width - 1) / width; | |
| 1174 if (extra > 0) | |
| 1175 { | |
| 1176 if ((colnr_T)(extra * width) > curwin->w_skipcol) | |
| 1177 extra = curwin->w_skipcol / width; | |
| 1178 curwin->w_skipcol -= extra * width; | |
| 1179 } | |
| 1180 } | |
| 1181 else if (extra == 2) | |
| 1182 { | |
| 1183 /* less then 'scrolloff' lines below, increase skipcol */ | |
| 1184 endcol = (n - curwin->w_height + 1) * width; | |
| 1185 while (endcol > curwin->w_virtcol) | |
| 1186 endcol -= width; | |
| 1187 if (endcol > curwin->w_skipcol) | |
| 1188 curwin->w_skipcol = endcol; | |
| 1189 } | |
| 1190 | |
| 1191 curwin->w_wrow -= curwin->w_skipcol / width; | |
| 1192 if (curwin->w_wrow >= curwin->w_height) | |
| 1193 { | |
| 1194 /* small window, make sure cursor is in it */ | |
| 1195 extra = curwin->w_wrow - curwin->w_height + 1; | |
| 1196 curwin->w_skipcol += extra * width; | |
| 1197 curwin->w_wrow -= extra; | |
| 1198 } | |
| 1199 | |
| 1200 extra = ((int)prev_skipcol - (int)curwin->w_skipcol) / width; | |
| 1201 if (extra > 0) | |
| 1202 win_ins_lines(curwin, 0, extra, FALSE, FALSE); | |
| 1203 else if (extra < 0) | |
| 1204 win_del_lines(curwin, 0, -extra, FALSE, FALSE); | |
| 1205 } | |
| 1206 else | |
| 1207 curwin->w_skipcol = 0; | |
| 1208 if (prev_skipcol != curwin->w_skipcol) | |
| 1209 redraw_later(NOT_VALID); | |
| 1210 | |
| 740 | 1211 #ifdef FEAT_SYN_HL |
| 5749 | 1212 /* Redraw when w_virtcol changes and 'cursorcolumn' is set */ |
| 1213 if (curwin->w_p_cuc && (curwin->w_valid & VALID_VIRTCOL) == 0 | |
| 1214 # ifdef FEAT_INS_EXPAND | |
| 1215 && !pum_visible() | |
| 1216 # endif | |
| 1217 ) | |
| 1218 redraw_later(SOME_VALID); | |
|
2178
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Add 'relativenumber' patch from Markus Heidelberg.
Bram Moolenaar <bram@vim.org>
parents:
2154
diff
changeset
|
1219 #endif |
| 740 | 1220 |
| 7 | 1221 curwin->w_valid |= VALID_WCOL|VALID_WROW|VALID_VIRTCOL; |
| 1222 } | |
| 1223 | |
| 1224 /* | |
| 1225 * Scroll the current window down by "line_count" logical lines. "CTRL-Y" | |
| 1226 */ | |
| 1227 void | |
| 1228 scrolldown(line_count, byfold) | |
| 1229 long line_count; | |
| 1877 | 1230 int byfold UNUSED; /* TRUE: count a closed fold as one line */ |
| 7 | 1231 { |
| 1232 long done = 0; /* total # of physical lines done */ | |
| 1233 int wrow; | |
| 1234 int moved = FALSE; | |
| 1235 | |
| 1236 #ifdef FEAT_FOLDING | |
| 1237 linenr_T first; | |
| 1238 | |
| 1239 /* Make sure w_topline is at the first of a sequence of folded lines. */ | |
| 1240 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 1241 #endif | |
| 1242 validate_cursor(); /* w_wrow needs to be valid */ | |
| 1243 while (line_count-- > 0) | |
| 1244 { | |
| 1245 #ifdef FEAT_DIFF | |
| 1980 | 1246 if (curwin->w_topfill < diff_check(curwin, curwin->w_topline) |
| 1247 && curwin->w_topfill < curwin->w_height - 1) | |
| 7 | 1248 { |
| 1249 ++curwin->w_topfill; | |
| 1250 ++done; | |
| 1251 } | |
| 1252 else | |
| 1253 #endif | |
| 1254 { | |
| 1255 if (curwin->w_topline == 1) | |
| 1256 break; | |
| 1257 --curwin->w_topline; | |
| 1258 #ifdef FEAT_DIFF | |
| 1259 curwin->w_topfill = 0; | |
| 1260 #endif | |
| 1261 #ifdef FEAT_FOLDING | |
| 1262 /* A sequence of folded lines only counts for one logical line */ | |
| 1263 if (hasFolding(curwin->w_topline, &first, NULL)) | |
| 1264 { | |
| 1265 ++done; | |
| 1266 if (!byfold) | |
| 1267 line_count -= curwin->w_topline - first - 1; | |
| 1268 curwin->w_botline -= curwin->w_topline - first; | |
| 1269 curwin->w_topline = first; | |
| 1270 } | |
| 1271 else | |
| 1272 #endif | |
| 1273 #ifdef FEAT_DIFF | |
| 1274 done += plines_nofill(curwin->w_topline); | |
| 1275 #else | |
| 1276 done += plines(curwin->w_topline); | |
| 1277 #endif | |
| 1278 } | |
| 1279 --curwin->w_botline; /* approximate w_botline */ | |
| 1280 invalidate_botline(); | |
| 1281 } | |
| 1282 curwin->w_wrow += done; /* keep w_wrow updated */ | |
| 1283 curwin->w_cline_row += done; /* keep w_cline_row updated */ | |
| 1284 | |
| 1285 #ifdef FEAT_DIFF | |
| 1286 if (curwin->w_cursor.lnum == curwin->w_topline) | |
| 1287 curwin->w_cline_row = 0; | |
| 1288 check_topfill(curwin, TRUE); | |
| 1289 #endif | |
| 1290 | |
| 1291 /* | |
| 1292 * Compute the row number of the last row of the cursor line | |
| 1293 * and move the cursor onto the displayed part of the window. | |
| 1294 */ | |
| 1295 wrow = curwin->w_wrow; | |
| 1296 if (curwin->w_p_wrap | |
| 1297 #ifdef FEAT_VERTSPLIT | |
| 1298 && curwin->w_width != 0 | |
| 1299 #endif | |
| 1300 ) | |
| 1301 { | |
| 1302 validate_virtcol(); | |
| 1303 validate_cheight(); | |
| 1304 wrow += curwin->w_cline_height - 1 - | |
| 1305 curwin->w_virtcol / W_WIDTH(curwin); | |
| 1306 } | |
| 1307 while (wrow >= curwin->w_height && curwin->w_cursor.lnum > 1) | |
| 1308 { | |
| 1309 #ifdef FEAT_FOLDING | |
| 1310 if (hasFolding(curwin->w_cursor.lnum, &first, NULL)) | |
| 1311 { | |
| 1312 --wrow; | |
| 1313 if (first == 1) | |
| 1314 curwin->w_cursor.lnum = 1; | |
| 1315 else | |
| 1316 curwin->w_cursor.lnum = first - 1; | |
| 1317 } | |
| 1318 else | |
| 1319 #endif | |
| 1320 wrow -= plines(curwin->w_cursor.lnum--); | |
| 1321 curwin->w_valid &= | |
| 1322 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL); | |
| 1323 moved = TRUE; | |
| 1324 } | |
| 1325 if (moved) | |
| 1326 { | |
| 1327 #ifdef FEAT_FOLDING | |
| 1328 /* Move cursor to first line of closed fold. */ | |
| 1329 foldAdjustCursor(); | |
| 1330 #endif | |
| 1331 coladvance(curwin->w_curswant); | |
| 1332 } | |
| 1333 } | |
| 1334 | |
| 1335 /* | |
| 1336 * Scroll the current window up by "line_count" logical lines. "CTRL-E" | |
| 1337 */ | |
| 1338 void | |
| 1339 scrollup(line_count, byfold) | |
| 1340 long line_count; | |
| 1877 | 1341 int byfold UNUSED; /* TRUE: count a closed fold as one line */ |
| 7 | 1342 { |
| 1343 #if defined(FEAT_FOLDING) || defined(FEAT_DIFF) | |
| 1344 linenr_T lnum; | |
| 1345 | |
| 1346 if ( | |
| 1347 # ifdef FEAT_FOLDING | |
| 1348 (byfold && hasAnyFolding(curwin)) | |
| 1349 # ifdef FEAT_DIFF | |
| 1350 || | |
| 1351 # endif | |
| 1352 # endif | |
| 1353 # ifdef FEAT_DIFF | |
| 1354 curwin->w_p_diff | |
| 1355 # endif | |
| 1356 ) | |
| 1357 { | |
| 1358 /* count each sequence of folded lines as one logical line */ | |
| 1359 lnum = curwin->w_topline; | |
| 1360 while (line_count--) | |
| 1361 { | |
| 1362 # ifdef FEAT_DIFF | |
| 1363 if (curwin->w_topfill > 0) | |
| 1364 --curwin->w_topfill; | |
| 1365 else | |
| 1366 # endif | |
| 1367 { | |
| 1368 # ifdef FEAT_FOLDING | |
| 1369 if (byfold) | |
| 1370 (void)hasFolding(lnum, NULL, &lnum); | |
| 1371 # endif | |
| 1372 if (lnum >= curbuf->b_ml.ml_line_count) | |
| 1373 break; | |
| 1374 ++lnum; | |
| 1375 # ifdef FEAT_DIFF | |
| 1376 curwin->w_topfill = diff_check_fill(curwin, lnum); | |
| 1377 # endif | |
| 1378 } | |
| 1379 } | |
| 1380 /* approximate w_botline */ | |
| 1381 curwin->w_botline += lnum - curwin->w_topline; | |
| 1382 curwin->w_topline = lnum; | |
| 1383 } | |
| 1384 else | |
| 1385 #endif | |
| 1386 { | |
| 1387 curwin->w_topline += line_count; | |
| 1388 curwin->w_botline += line_count; /* approximate w_botline */ | |
| 1389 } | |
| 1390 | |
| 1391 if (curwin->w_topline > curbuf->b_ml.ml_line_count) | |
| 1392 curwin->w_topline = curbuf->b_ml.ml_line_count; | |
| 1393 if (curwin->w_botline > curbuf->b_ml.ml_line_count + 1) | |
| 1394 curwin->w_botline = curbuf->b_ml.ml_line_count + 1; | |
| 1395 | |
| 1396 #ifdef FEAT_DIFF | |
| 1397 check_topfill(curwin, FALSE); | |
| 1398 #endif | |
| 1399 | |
| 1400 #ifdef FEAT_FOLDING | |
| 1401 if (hasAnyFolding(curwin)) | |
| 1402 /* Make sure w_topline is at the first of a sequence of folded lines. */ | |
| 1403 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 1404 #endif | |
| 1405 | |
| 1406 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 1407 if (curwin->w_cursor.lnum < curwin->w_topline) | |
| 1408 { | |
| 1409 curwin->w_cursor.lnum = curwin->w_topline; | |
| 1410 curwin->w_valid &= | |
| 1411 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL); | |
| 1412 coladvance(curwin->w_curswant); | |
| 1413 } | |
| 1414 } | |
| 1415 | |
| 1416 #ifdef FEAT_DIFF | |
| 1417 /* | |
| 1418 * Don't end up with too many filler lines in the window. | |
| 1419 */ | |
| 1420 void | |
| 1421 check_topfill(wp, down) | |
| 1422 win_T *wp; | |
| 1423 int down; /* when TRUE scroll down when not enough space */ | |
| 1424 { | |
| 1425 int n; | |
| 1426 | |
| 1427 if (wp->w_topfill > 0) | |
| 1428 { | |
| 1429 n = plines_win_nofill(wp, wp->w_topline, TRUE); | |
| 1430 if (wp->w_topfill + n > wp->w_height) | |
| 1431 { | |
| 1432 if (down && wp->w_topline > 1) | |
| 1433 { | |
| 1434 --wp->w_topline; | |
| 1435 wp->w_topfill = 0; | |
| 1436 } | |
| 1437 else | |
| 1438 { | |
| 1439 wp->w_topfill = wp->w_height - n; | |
| 1440 if (wp->w_topfill < 0) | |
| 1441 wp->w_topfill = 0; | |
| 1442 } | |
| 1443 } | |
| 1444 } | |
| 1445 } | |
| 1446 | |
| 1447 /* | |
| 1448 * Use as many filler lines as possible for w_topline. Make sure w_topline | |
| 1449 * is still visible. | |
| 1450 */ | |
| 1451 static void | |
| 1452 max_topfill() | |
| 1453 { | |
| 1454 int n; | |
| 1455 | |
| 1456 n = plines_nofill(curwin->w_topline); | |
| 1457 if (n >= curwin->w_height) | |
| 1458 curwin->w_topfill = 0; | |
| 1459 else | |
| 1460 { | |
| 1461 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline); | |
| 1462 if (curwin->w_topfill + n > curwin->w_height) | |
| 1463 curwin->w_topfill = curwin->w_height - n; | |
| 1464 } | |
| 1465 } | |
| 1466 #endif | |
| 1467 | |
| 1468 #if defined(FEAT_INS_EXPAND) || defined(PROTO) | |
| 1469 /* | |
| 1470 * Scroll the screen one line down, but don't do it if it would move the | |
| 1471 * cursor off the screen. | |
| 1472 */ | |
| 1473 void | |
| 1474 scrolldown_clamp() | |
| 1475 { | |
| 1476 int end_row; | |
| 1477 #ifdef FEAT_DIFF | |
| 1478 int can_fill = (curwin->w_topfill | |
| 1479 < diff_check_fill(curwin, curwin->w_topline)); | |
| 1480 #endif | |
| 1481 | |
| 1482 if (curwin->w_topline <= 1 | |
| 1483 #ifdef FEAT_DIFF | |
| 1484 && !can_fill | |
| 1485 #endif | |
| 1486 ) | |
| 1487 return; | |
| 1488 | |
| 1489 validate_cursor(); /* w_wrow needs to be valid */ | |
| 1490 | |
| 1491 /* | |
| 1492 * Compute the row number of the last row of the cursor line | |
| 1493 * and make sure it doesn't go off the screen. Make sure the cursor | |
| 1494 * doesn't go past 'scrolloff' lines from the screen end. | |
| 1495 */ | |
| 1496 end_row = curwin->w_wrow; | |
| 1497 #ifdef FEAT_DIFF | |
| 1498 if (can_fill) | |
| 1499 ++end_row; | |
| 1500 else | |
| 1501 end_row += plines_nofill(curwin->w_topline - 1); | |
| 1502 #else | |
| 1503 end_row += plines(curwin->w_topline - 1); | |
| 1504 #endif | |
| 1505 if (curwin->w_p_wrap | |
| 1506 #ifdef FEAT_VERTSPLIT | |
| 1507 && curwin->w_width != 0 | |
| 1508 #endif | |
| 1509 ) | |
| 1510 { | |
| 1511 validate_cheight(); | |
| 1512 validate_virtcol(); | |
| 1513 end_row += curwin->w_cline_height - 1 - | |
| 1514 curwin->w_virtcol / W_WIDTH(curwin); | |
| 1515 } | |
| 1516 if (end_row < curwin->w_height - p_so) | |
| 1517 { | |
| 1518 #ifdef FEAT_DIFF | |
| 1519 if (can_fill) | |
| 1520 { | |
| 1521 ++curwin->w_topfill; | |
| 1522 check_topfill(curwin, TRUE); | |
| 1523 } | |
| 1524 else | |
| 1525 { | |
| 1526 --curwin->w_topline; | |
| 1527 curwin->w_topfill = 0; | |
| 1528 } | |
| 1529 #else | |
| 1530 --curwin->w_topline; | |
| 1531 #endif | |
| 1532 #ifdef FEAT_FOLDING | |
| 1533 hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 1534 #endif | |
| 1535 --curwin->w_botline; /* approximate w_botline */ | |
| 1536 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 1537 } | |
| 1538 } | |
| 1539 | |
| 1540 /* | |
| 1541 * Scroll the screen one line up, but don't do it if it would move the cursor | |
| 1542 * off the screen. | |
| 1543 */ | |
| 1544 void | |
| 1545 scrollup_clamp() | |
| 1546 { | |
| 1547 int start_row; | |
| 1548 | |
| 1549 if (curwin->w_topline == curbuf->b_ml.ml_line_count | |
| 1550 #ifdef FEAT_DIFF | |
| 1551 && curwin->w_topfill == 0 | |
| 1552 #endif | |
| 1553 ) | |
| 1554 return; | |
| 1555 | |
| 1556 validate_cursor(); /* w_wrow needs to be valid */ | |
| 1557 | |
| 1558 /* | |
| 1559 * Compute the row number of the first row of the cursor line | |
| 1560 * and make sure it doesn't go off the screen. Make sure the cursor | |
| 1561 * doesn't go before 'scrolloff' lines from the screen start. | |
| 1562 */ | |
| 1563 #ifdef FEAT_DIFF | |
| 1564 start_row = curwin->w_wrow - plines_nofill(curwin->w_topline) | |
| 1565 - curwin->w_topfill; | |
| 1566 #else | |
| 1567 start_row = curwin->w_wrow - plines(curwin->w_topline); | |
| 1568 #endif | |
| 1569 if (curwin->w_p_wrap | |
| 1570 #ifdef FEAT_VERTSPLIT | |
| 1571 && curwin->w_width != 0 | |
| 1572 #endif | |
| 1573 ) | |
| 1574 { | |
| 1575 validate_virtcol(); | |
| 1576 start_row -= curwin->w_virtcol / W_WIDTH(curwin); | |
| 1577 } | |
| 1578 if (start_row >= p_so) | |
| 1579 { | |
| 1580 #ifdef FEAT_DIFF | |
| 1581 if (curwin->w_topfill > 0) | |
| 1582 --curwin->w_topfill; | |
| 1583 else | |
| 1584 #endif | |
| 36 | 1585 { |
| 1586 #ifdef FEAT_FOLDING | |
| 1587 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline); | |
| 1588 #endif | |
| 7 | 1589 ++curwin->w_topline; |
| 36 | 1590 } |
| 7 | 1591 ++curwin->w_botline; /* approximate w_botline */ |
| 1592 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 1593 } | |
| 1594 } | |
| 1595 #endif /* FEAT_INS_EXPAND */ | |
| 1596 | |
| 1597 /* | |
| 1598 * Add one line above "lp->lnum". This can be a filler line, a closed fold or | |
| 1599 * a (wrapped) text line. Uses and sets "lp->fill". | |
| 1600 * Returns the height of the added line in "lp->height". | |
|
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8ca3c9ad0bee
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Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
1601 * Lines above the first one are incredibly high: MAXCOL. |
| 7 | 1602 */ |
| 1603 static void | |
| 1604 topline_back(lp) | |
| 1605 lineoff_T *lp; | |
| 1606 { | |
| 1607 #ifdef FEAT_DIFF | |
| 1608 if (lp->fill < diff_check_fill(curwin, lp->lnum)) | |
| 1609 { | |
| 1610 /* Add a filler line. */ | |
| 1611 ++lp->fill; | |
| 1612 lp->height = 1; | |
| 1613 } | |
| 1614 else | |
| 1615 #endif | |
| 1616 { | |
| 1617 --lp->lnum; | |
| 1618 #ifdef FEAT_DIFF | |
| 1619 lp->fill = 0; | |
| 1620 #endif | |
| 1621 if (lp->lnum < 1) | |
| 1622 lp->height = MAXCOL; | |
| 1623 else | |
| 1624 #ifdef FEAT_FOLDING | |
| 1625 if (hasFolding(lp->lnum, &lp->lnum, NULL)) | |
| 1626 /* Add a closed fold */ | |
| 1627 lp->height = 1; | |
| 1628 else | |
| 1629 #endif | |
| 1630 { | |
| 1631 #ifdef FEAT_DIFF | |
| 1632 lp->height = plines_nofill(lp->lnum); | |
| 1633 #else | |
| 1634 lp->height = plines(lp->lnum); | |
| 1635 #endif | |
| 1636 } | |
| 1637 } | |
| 1638 } | |
| 1639 | |
| 1640 /* | |
| 1641 * Add one line below "lp->lnum". This can be a filler line, a closed fold or | |
| 1642 * a (wrapped) text line. Uses and sets "lp->fill". | |
| 1643 * Returns the height of the added line in "lp->height". | |
| 1644 * Lines below the last one are incredibly high. | |
| 1645 */ | |
| 1646 static void | |
| 1647 botline_forw(lp) | |
| 1648 lineoff_T *lp; | |
| 1649 { | |
| 1650 #ifdef FEAT_DIFF | |
| 1651 if (lp->fill < diff_check_fill(curwin, lp->lnum + 1)) | |
| 1652 { | |
| 1653 /* Add a filler line. */ | |
| 1654 ++lp->fill; | |
| 1655 lp->height = 1; | |
| 1656 } | |
| 1657 else | |
| 1658 #endif | |
| 1659 { | |
| 1660 ++lp->lnum; | |
| 1661 #ifdef FEAT_DIFF | |
| 1662 lp->fill = 0; | |
| 1663 #endif | |
| 1664 if (lp->lnum > curbuf->b_ml.ml_line_count) | |
| 1665 lp->height = MAXCOL; | |
| 1666 else | |
| 1667 #ifdef FEAT_FOLDING | |
| 1668 if (hasFolding(lp->lnum, NULL, &lp->lnum)) | |
| 1669 /* Add a closed fold */ | |
| 1670 lp->height = 1; | |
| 1671 else | |
| 1672 #endif | |
| 1673 { | |
| 1674 #ifdef FEAT_DIFF | |
| 1675 lp->height = plines_nofill(lp->lnum); | |
| 1676 #else | |
| 1677 lp->height = plines(lp->lnum); | |
| 1678 #endif | |
| 1679 } | |
| 1680 } | |
| 1681 } | |
| 1682 | |
| 1683 #ifdef FEAT_DIFF | |
| 1684 /* | |
| 1685 * Switch from including filler lines below lp->lnum to including filler | |
| 1686 * lines above loff.lnum + 1. This keeps pointing to the same line. | |
| 1687 * When there are no filler lines nothing changes. | |
| 1688 */ | |
| 1689 static void | |
| 1690 botline_topline(lp) | |
| 1691 lineoff_T *lp; | |
| 1692 { | |
| 1693 if (lp->fill > 0) | |
| 1694 { | |
| 1695 ++lp->lnum; | |
| 1696 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1; | |
| 1697 } | |
| 1698 } | |
| 1699 | |
| 1700 /* | |
| 1701 * Switch from including filler lines above lp->lnum to including filler | |
| 1702 * lines below loff.lnum - 1. This keeps pointing to the same line. | |
| 1703 * When there are no filler lines nothing changes. | |
| 1704 */ | |
| 1705 static void | |
| 1706 topline_botline(lp) | |
| 1707 lineoff_T *lp; | |
| 1708 { | |
| 1709 if (lp->fill > 0) | |
| 1710 { | |
| 1711 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1; | |
| 1712 --lp->lnum; | |
| 1713 } | |
| 1714 } | |
| 1715 #endif | |
| 1716 | |
| 1717 /* | |
| 1718 * Recompute topline to put the cursor at the top of the window. | |
| 1719 * Scroll at least "min_scroll" lines. | |
| 1720 * If "always" is TRUE, always set topline (for "zt"). | |
| 1721 */ | |
| 1722 void | |
| 1723 scroll_cursor_top(min_scroll, always) | |
| 1724 int min_scroll; | |
| 1725 int always; | |
| 1726 { | |
| 1727 int scrolled = 0; | |
| 1728 int extra = 0; | |
| 1729 int used; | |
| 1730 int i; | |
| 1731 linenr_T top; /* just above displayed lines */ | |
| 1732 linenr_T bot; /* just below displayed lines */ | |
| 1733 linenr_T old_topline = curwin->w_topline; | |
| 1734 #ifdef FEAT_DIFF | |
| 1735 linenr_T old_topfill = curwin->w_topfill; | |
| 1736 #endif | |
| 1737 linenr_T new_topline; | |
| 1738 int off = p_so; | |
| 1739 | |
| 1740 #ifdef FEAT_MOUSE | |
| 1741 if (mouse_dragging > 0) | |
| 1742 off = mouse_dragging - 1; | |
| 1743 #endif | |
| 1744 | |
| 1745 /* | |
| 1746 * Decrease topline until: | |
| 1747 * - it has become 1 | |
| 1748 * - (part of) the cursor line is moved off the screen or | |
| 1749 * - moved at least 'scrolljump' lines and | |
| 1750 * - at least 'scrolloff' lines above and below the cursor | |
| 1751 */ | |
| 1752 validate_cheight(); | |
| 1753 used = curwin->w_cline_height; | |
| 1754 if (curwin->w_cursor.lnum < curwin->w_topline) | |
| 1755 scrolled = used; | |
| 1756 | |
| 1757 #ifdef FEAT_FOLDING | |
| 1758 if (hasFolding(curwin->w_cursor.lnum, &top, &bot)) | |
| 1759 { | |
| 1760 --top; | |
| 1761 ++bot; | |
| 1762 } | |
| 1763 else | |
| 1764 #endif | |
| 1765 { | |
| 1766 top = curwin->w_cursor.lnum - 1; | |
| 1767 bot = curwin->w_cursor.lnum + 1; | |
| 1768 } | |
| 1769 new_topline = top + 1; | |
| 1770 | |
| 1771 #ifdef FEAT_DIFF | |
| 1772 /* count filler lines of the cursor window as context */ | |
| 1773 i = diff_check_fill(curwin, curwin->w_cursor.lnum); | |
| 1774 used += i; | |
| 1775 extra += i; | |
| 1776 #endif | |
| 1777 | |
| 1778 /* | |
| 1779 * Check if the lines from "top" to "bot" fit in the window. If they do, | |
| 1780 * set new_topline and advance "top" and "bot" to include more lines. | |
| 1781 */ | |
| 1782 while (top > 0) | |
| 1783 { | |
| 1784 #ifdef FEAT_FOLDING | |
| 1785 if (hasFolding(top, &top, NULL)) | |
| 1786 /* count one logical line for a sequence of folded lines */ | |
| 1787 i = 1; | |
| 1788 else | |
| 1789 #endif | |
| 1790 i = plines(top); | |
| 1791 used += i; | |
| 1792 if (extra + i <= off && bot < curbuf->b_ml.ml_line_count) | |
| 1793 { | |
| 1794 #ifdef FEAT_FOLDING | |
| 1795 if (hasFolding(bot, NULL, &bot)) | |
| 1796 /* count one logical line for a sequence of folded lines */ | |
| 1797 ++used; | |
| 1798 else | |
| 1799 #endif | |
| 1800 used += plines(bot); | |
| 1801 } | |
| 1802 if (used > curwin->w_height) | |
| 1803 break; | |
| 1804 if (top < curwin->w_topline) | |
| 1805 scrolled += i; | |
| 1806 | |
| 1807 /* | |
| 1808 * If scrolling is needed, scroll at least 'sj' lines. | |
| 1809 */ | |
| 1810 if ((new_topline >= curwin->w_topline || scrolled > min_scroll) | |
| 1811 && extra >= off) | |
| 1812 break; | |
| 1813 | |
| 1814 extra += i; | |
| 1815 new_topline = top; | |
| 1816 --top; | |
| 1817 ++bot; | |
| 1818 } | |
| 1819 | |
| 1820 /* | |
| 1821 * If we don't have enough space, put cursor in the middle. | |
| 1822 * This makes sure we get the same position when using "k" and "j" | |
| 1823 * in a small window. | |
| 1824 */ | |
| 1825 if (used > curwin->w_height) | |
| 1826 scroll_cursor_halfway(FALSE); | |
| 1827 else | |
| 1828 { | |
| 1829 /* | |
| 1830 * If "always" is FALSE, only adjust topline to a lower value, higher | |
| 1831 * value may happen with wrapping lines | |
| 1832 */ | |
| 1833 if (new_topline < curwin->w_topline || always) | |
| 1834 curwin->w_topline = new_topline; | |
| 1835 if (curwin->w_topline > curwin->w_cursor.lnum) | |
| 1836 curwin->w_topline = curwin->w_cursor.lnum; | |
| 1837 #ifdef FEAT_DIFF | |
| 1838 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline); | |
| 1839 if (curwin->w_topfill > 0 && extra > off) | |
| 1840 { | |
| 1841 curwin->w_topfill -= extra - off; | |
| 1842 if (curwin->w_topfill < 0) | |
| 1843 curwin->w_topfill = 0; | |
| 1844 } | |
| 1845 check_topfill(curwin, FALSE); | |
| 1846 #endif | |
| 1847 if (curwin->w_topline != old_topline | |
| 1848 #ifdef FEAT_DIFF | |
| 1849 || curwin->w_topfill != old_topfill | |
| 1850 #endif | |
| 1851 ) | |
| 1852 curwin->w_valid &= | |
| 1853 ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 1854 curwin->w_valid |= VALID_TOPLINE; | |
| 1855 } | |
| 1856 } | |
| 1857 | |
| 1858 /* | |
| 1859 * Set w_empty_rows and w_filler_rows for window "wp", having used up "used" | |
| 1860 * screen lines for text lines. | |
| 1861 */ | |
| 1862 void | |
| 1863 set_empty_rows(wp, used) | |
| 1864 win_T *wp; | |
| 1865 int used; | |
| 1866 { | |
| 1867 #ifdef FEAT_DIFF | |
| 1868 wp->w_filler_rows = 0; | |
| 1869 #endif | |
| 1870 if (used == 0) | |
| 1871 wp->w_empty_rows = 0; /* single line that doesn't fit */ | |
| 1872 else | |
| 1873 { | |
| 1874 wp->w_empty_rows = wp->w_height - used; | |
| 1875 #ifdef FEAT_DIFF | |
| 1876 if (wp->w_botline <= wp->w_buffer->b_ml.ml_line_count) | |
| 1877 { | |
| 1878 wp->w_filler_rows = diff_check_fill(wp, wp->w_botline); | |
| 1879 if (wp->w_empty_rows > wp->w_filler_rows) | |
| 1880 wp->w_empty_rows -= wp->w_filler_rows; | |
| 1881 else | |
| 1882 { | |
| 1883 wp->w_filler_rows = wp->w_empty_rows; | |
| 1884 wp->w_empty_rows = 0; | |
| 1885 } | |
| 1886 } | |
| 1887 #endif | |
| 1888 } | |
| 1889 } | |
| 1890 | |
| 1891 /* | |
| 1892 * Recompute topline to put the cursor at the bottom of the window. | |
| 1893 * Scroll at least "min_scroll" lines. | |
| 1894 * If "set_topbot" is TRUE, set topline and botline first (for "zb"). | |
| 1895 * This is messy stuff!!! | |
| 1896 */ | |
| 1897 void | |
| 1898 scroll_cursor_bot(min_scroll, set_topbot) | |
| 1899 int min_scroll; | |
| 1900 int set_topbot; | |
| 1901 { | |
| 1902 int used; | |
| 1903 int scrolled = 0; | |
| 1904 int extra = 0; | |
| 1905 int i; | |
| 1906 linenr_T line_count; | |
| 1907 linenr_T old_topline = curwin->w_topline; | |
| 1908 lineoff_T loff; | |
| 1909 lineoff_T boff; | |
| 1910 #ifdef FEAT_DIFF | |
| 1911 int old_topfill = curwin->w_topfill; | |
| 1912 int fill_below_window; | |
| 1913 #endif | |
| 1914 linenr_T old_botline = curwin->w_botline; | |
| 1915 linenr_T old_valid = curwin->w_valid; | |
| 1916 int old_empty_rows = curwin->w_empty_rows; | |
| 1917 linenr_T cln; /* Cursor Line Number */ | |
| 1918 | |
| 1919 cln = curwin->w_cursor.lnum; | |
| 1920 if (set_topbot) | |
| 1921 { | |
| 1922 used = 0; | |
| 1923 curwin->w_botline = cln + 1; | |
| 1924 #ifdef FEAT_DIFF | |
| 1925 loff.fill = 0; | |
| 1926 #endif | |
| 1927 for (curwin->w_topline = curwin->w_botline; | |
| 1928 curwin->w_topline > 1; | |
| 1929 curwin->w_topline = loff.lnum) | |
| 1930 { | |
| 1931 loff.lnum = curwin->w_topline; | |
| 1932 topline_back(&loff); | |
|
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1933 if (loff.height == MAXCOL || used + loff.height > curwin->w_height) |
| 7 | 1934 break; |
| 1935 used += loff.height; | |
| 1936 #ifdef FEAT_DIFF | |
| 1937 curwin->w_topfill = loff.fill; | |
| 1938 #endif | |
| 1939 } | |
| 1940 set_empty_rows(curwin, used); | |
| 1941 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP; | |
| 1942 if (curwin->w_topline != old_topline | |
| 1943 #ifdef FEAT_DIFF | |
| 1944 || curwin->w_topfill != old_topfill | |
| 1945 #endif | |
| 1946 ) | |
| 1947 curwin->w_valid &= ~(VALID_WROW|VALID_CROW); | |
| 1948 } | |
| 1949 else | |
| 1950 validate_botline(); | |
| 1951 | |
| 1952 /* The lines of the cursor line itself are always used. */ | |
| 1953 #ifdef FEAT_DIFF | |
| 1954 used = plines_nofill(cln); | |
| 1955 #else | |
| 1956 validate_cheight(); | |
| 1957 used = curwin->w_cline_height; | |
| 1958 #endif | |
| 1959 | |
| 1960 /* If the cursor is below botline, we will at least scroll by the height | |
| 1961 * of the cursor line. Correct for empty lines, which are really part of | |
| 1962 * botline. */ | |
| 1963 if (cln >= curwin->w_botline) | |
| 1964 { | |
| 1965 scrolled = used; | |
| 1966 if (cln == curwin->w_botline) | |
| 1967 scrolled -= curwin->w_empty_rows; | |
| 1968 } | |
| 1969 | |
| 1970 /* | |
| 1971 * Stop counting lines to scroll when | |
| 1972 * - hitting start of the file | |
| 1973 * - scrolled nothing or at least 'sj' lines | |
| 1974 * - at least 'so' lines below the cursor | |
| 1975 * - lines between botline and cursor have been counted | |
| 1976 */ | |
| 1977 #ifdef FEAT_FOLDING | |
| 1978 if (!hasFolding(curwin->w_cursor.lnum, &loff.lnum, &boff.lnum)) | |
| 1979 #endif | |
| 1980 { | |
| 1981 loff.lnum = cln; | |
| 1982 boff.lnum = cln; | |
| 1983 } | |
| 1984 #ifdef FEAT_DIFF | |
| 1985 loff.fill = 0; | |
| 1986 boff.fill = 0; | |
| 1987 fill_below_window = diff_check_fill(curwin, curwin->w_botline) | |
| 1988 - curwin->w_filler_rows; | |
| 1989 #endif | |
| 1990 | |
| 1991 while (loff.lnum > 1) | |
| 1992 { | |
| 1993 /* Stop when scrolled nothing or at least "min_scroll", found "extra" | |
| 1994 * context for 'scrolloff' and counted all lines below the window. */ | |
| 1995 if ((((scrolled <= 0 || scrolled >= min_scroll) | |
| 1996 && extra >= ( | |
| 1997 #ifdef FEAT_MOUSE | |
| 1121 | 1998 mouse_dragging > 0 ? mouse_dragging - 1 : |
| 7 | 1999 #endif |
| 2000 p_so)) | |
| 2001 || boff.lnum + 1 > curbuf->b_ml.ml_line_count) | |
| 2002 && loff.lnum <= curwin->w_botline | |
| 2003 #ifdef FEAT_DIFF | |
| 2004 && (loff.lnum < curwin->w_botline | |
| 2005 || loff.fill >= fill_below_window) | |
| 2006 #endif | |
| 2007 ) | |
| 2008 break; | |
| 2009 | |
| 2010 /* Add one line above */ | |
| 2011 topline_back(&loff); | |
|
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2012 if (loff.height == MAXCOL) |
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2013 used = MAXCOL; |
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2014 else |
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2015 used += loff.height; |
| 7 | 2016 if (used > curwin->w_height) |
| 2017 break; | |
| 2018 if (loff.lnum >= curwin->w_botline | |
| 2019 #ifdef FEAT_DIFF | |
| 2020 && (loff.lnum > curwin->w_botline | |
| 2021 || loff.fill <= fill_below_window) | |
| 2022 #endif | |
| 2023 ) | |
| 2024 { | |
| 2025 /* Count screen lines that are below the window. */ | |
| 2026 scrolled += loff.height; | |
| 2027 if (loff.lnum == curwin->w_botline | |
| 2028 #ifdef FEAT_DIFF | |
| 2029 && boff.fill == 0 | |
| 2030 #endif | |
| 2031 ) | |
| 2032 scrolled -= curwin->w_empty_rows; | |
| 2033 } | |
| 2034 | |
| 2035 if (boff.lnum < curbuf->b_ml.ml_line_count) | |
| 2036 { | |
| 2037 /* Add one line below */ | |
| 2038 botline_forw(&boff); | |
| 2039 used += boff.height; | |
| 2040 if (used > curwin->w_height) | |
| 2041 break; | |
| 2042 if (extra < ( | |
| 2043 #ifdef FEAT_MOUSE | |
| 2044 mouse_dragging > 0 ? mouse_dragging - 1 : | |
| 2045 #endif | |
| 2046 p_so) || scrolled < min_scroll) | |
| 2047 { | |
| 2048 extra += boff.height; | |
| 2049 if (boff.lnum >= curwin->w_botline | |
| 2050 #ifdef FEAT_DIFF | |
| 2051 || (boff.lnum + 1 == curwin->w_botline | |
| 2052 && boff.fill > curwin->w_filler_rows) | |
| 2053 #endif | |
| 2054 ) | |
| 2055 { | |
| 2056 /* Count screen lines that are below the window. */ | |
| 2057 scrolled += boff.height; | |
| 2058 if (boff.lnum == curwin->w_botline | |
| 2059 #ifdef FEAT_DIFF | |
| 2060 && boff.fill == 0 | |
| 2061 #endif | |
| 2062 ) | |
| 2063 scrolled -= curwin->w_empty_rows; | |
| 2064 } | |
| 2065 } | |
| 2066 } | |
| 2067 } | |
| 2068 | |
| 2069 /* curwin->w_empty_rows is larger, no need to scroll */ | |
| 2070 if (scrolled <= 0) | |
| 2071 line_count = 0; | |
| 2072 /* more than a screenfull, don't scroll but redraw */ | |
| 2073 else if (used > curwin->w_height) | |
| 2074 line_count = used; | |
| 2075 /* scroll minimal number of lines */ | |
| 2076 else | |
| 2077 { | |
| 2078 line_count = 0; | |
| 2079 #ifdef FEAT_DIFF | |
| 2080 boff.fill = curwin->w_topfill; | |
| 2081 #endif | |
| 2082 boff.lnum = curwin->w_topline - 1; | |
| 2083 for (i = 0; i < scrolled && boff.lnum < curwin->w_botline; ) | |
| 2084 { | |
| 2085 botline_forw(&boff); | |
| 2086 i += boff.height; | |
| 2087 ++line_count; | |
| 2088 } | |
| 2089 if (i < scrolled) /* below curwin->w_botline, don't scroll */ | |
| 2090 line_count = 9999; | |
| 2091 } | |
| 2092 | |
| 2093 /* | |
| 2094 * Scroll up if the cursor is off the bottom of the screen a bit. | |
| 2095 * Otherwise put it at 1/2 of the screen. | |
| 2096 */ | |
| 2097 if (line_count >= curwin->w_height && line_count > min_scroll) | |
| 2098 scroll_cursor_halfway(FALSE); | |
| 2099 else | |
| 2100 scrollup(line_count, TRUE); | |
| 2101 | |
| 2102 /* | |
| 2103 * If topline didn't change we need to restore w_botline and w_empty_rows | |
| 2104 * (we changed them). | |
| 2105 * If topline did change, update_screen() will set botline. | |
| 2106 */ | |
| 2107 if (curwin->w_topline == old_topline && set_topbot) | |
| 2108 { | |
| 2109 curwin->w_botline = old_botline; | |
| 2110 curwin->w_empty_rows = old_empty_rows; | |
| 2111 curwin->w_valid = old_valid; | |
| 2112 } | |
| 2113 curwin->w_valid |= VALID_TOPLINE; | |
| 2114 } | |
| 2115 | |
| 2116 /* | |
| 2117 * Recompute topline to put the cursor halfway the window | |
| 2118 * If "atend" is TRUE, also put it halfway at the end of the file. | |
| 2119 */ | |
| 2120 void | |
| 2121 scroll_cursor_halfway(atend) | |
| 2122 int atend; | |
| 2123 { | |
| 2124 int above = 0; | |
| 2125 linenr_T topline; | |
| 2126 #ifdef FEAT_DIFF | |
| 2127 int topfill = 0; | |
| 2128 #endif | |
| 2129 int below = 0; | |
| 2130 int used; | |
| 2131 lineoff_T loff; | |
| 2132 lineoff_T boff; | |
| 5661 | 2133 #ifdef FEAT_DIFF |
| 5653 | 2134 linenr_T old_topline = curwin->w_topline; |
| 5661 | 2135 #endif |
| 7 | 2136 |
| 2137 loff.lnum = boff.lnum = curwin->w_cursor.lnum; | |
| 2138 #ifdef FEAT_FOLDING | |
| 2139 (void)hasFolding(loff.lnum, &loff.lnum, &boff.lnum); | |
| 2140 #endif | |
| 2141 #ifdef FEAT_DIFF | |
| 2142 used = plines_nofill(loff.lnum); | |
| 2143 loff.fill = 0; | |
| 2144 boff.fill = 0; | |
| 2145 #else | |
| 2146 used = plines(loff.lnum); | |
| 2147 #endif | |
| 2148 topline = loff.lnum; | |
| 2149 while (topline > 1) | |
| 2150 { | |
| 2151 if (below <= above) /* add a line below the cursor first */ | |
| 2152 { | |
| 2153 if (boff.lnum < curbuf->b_ml.ml_line_count) | |
| 2154 { | |
| 2155 botline_forw(&boff); | |
| 2156 used += boff.height; | |
| 2157 if (used > curwin->w_height) | |
| 2158 break; | |
| 2159 below += boff.height; | |
| 2160 } | |
| 2161 else | |
| 2162 { | |
| 2163 ++below; /* count a "~" line */ | |
| 2164 if (atend) | |
| 2165 ++used; | |
| 2166 } | |
| 2167 } | |
| 2168 | |
| 2169 if (below > above) /* add a line above the cursor */ | |
| 2170 { | |
| 2171 topline_back(&loff); | |
|
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2172 if (loff.height == MAXCOL) |
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2173 used = MAXCOL; |
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2174 else |
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2175 used += loff.height; |
| 7 | 2176 if (used > curwin->w_height) |
| 2177 break; | |
| 2178 above += loff.height; | |
| 2179 topline = loff.lnum; | |
| 2180 #ifdef FEAT_DIFF | |
| 2181 topfill = loff.fill; | |
| 2182 #endif | |
| 2183 } | |
| 2184 } | |
| 2185 #ifdef FEAT_FOLDING | |
| 2186 if (!hasFolding(topline, &curwin->w_topline, NULL)) | |
| 2187 #endif | |
| 2188 curwin->w_topline = topline; | |
| 2189 #ifdef FEAT_DIFF | |
| 2190 curwin->w_topfill = topfill; | |
| 5653 | 2191 if (old_topline > curwin->w_topline + curwin->w_height) |
| 2192 curwin->w_botfill = FALSE; | |
| 7 | 2193 check_topfill(curwin, FALSE); |
| 2194 #endif | |
| 2195 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 2196 curwin->w_valid |= VALID_TOPLINE; | |
| 2197 } | |
| 2198 | |
| 2199 /* | |
| 2200 * Correct the cursor position so that it is in a part of the screen at least | |
| 2201 * 'so' lines from the top and bottom, if possible. | |
| 2202 * If not possible, put it at the same position as scroll_cursor_halfway(). | |
| 2203 * When called topline must be valid! | |
| 2204 */ | |
| 2205 void | |
| 2206 cursor_correct() | |
| 2207 { | |
| 2208 int above = 0; /* screen lines above topline */ | |
| 2209 linenr_T topline; | |
| 2210 int below = 0; /* screen lines below botline */ | |
| 2211 linenr_T botline; | |
| 2212 int above_wanted, below_wanted; | |
| 2213 linenr_T cln; /* Cursor Line Number */ | |
| 2214 int max_off; | |
| 2215 | |
| 2216 /* | |
| 2217 * How many lines we would like to have above/below the cursor depends on | |
| 2218 * whether the first/last line of the file is on screen. | |
| 2219 */ | |
| 2220 above_wanted = p_so; | |
| 2221 below_wanted = p_so; | |
| 2222 #ifdef FEAT_MOUSE | |
| 1121 | 2223 if (mouse_dragging > 0) |
| 7 | 2224 { |
| 2225 above_wanted = mouse_dragging - 1; | |
| 2226 below_wanted = mouse_dragging - 1; | |
| 2227 } | |
| 2228 #endif | |
| 2229 if (curwin->w_topline == 1) | |
| 2230 { | |
| 2231 above_wanted = 0; | |
| 2232 max_off = curwin->w_height / 2; | |
| 2233 if (below_wanted > max_off) | |
| 2234 below_wanted = max_off; | |
| 2235 } | |
| 2236 validate_botline(); | |
| 2237 if (curwin->w_botline == curbuf->b_ml.ml_line_count + 1 | |
| 2238 #ifdef FEAT_MOUSE | |
| 1121 | 2239 && mouse_dragging == 0 |
| 7 | 2240 #endif |
| 2241 ) | |
| 2242 { | |
| 2243 below_wanted = 0; | |
| 2244 max_off = (curwin->w_height - 1) / 2; | |
| 2245 if (above_wanted > max_off) | |
| 2246 above_wanted = max_off; | |
| 2247 } | |
| 2248 | |
| 2249 /* | |
| 2250 * If there are sufficient file-lines above and below the cursor, we can | |
| 2251 * return now. | |
| 2252 */ | |
| 2253 cln = curwin->w_cursor.lnum; | |
| 2254 if (cln >= curwin->w_topline + above_wanted | |
| 2255 && cln < curwin->w_botline - below_wanted | |
| 2256 #ifdef FEAT_FOLDING | |
| 2257 && !hasAnyFolding(curwin) | |
| 2258 #endif | |
| 2259 ) | |
| 2260 return; | |
| 2261 | |
| 2262 /* | |
| 2263 * Narrow down the area where the cursor can be put by taking lines from | |
| 2264 * the top and the bottom until: | |
| 2265 * - the desired context lines are found | |
| 2266 * - the lines from the top is past the lines from the bottom | |
| 2267 */ | |
| 2268 topline = curwin->w_topline; | |
| 2269 botline = curwin->w_botline - 1; | |
| 2270 #ifdef FEAT_DIFF | |
| 2271 /* count filler lines as context */ | |
| 2272 above = curwin->w_topfill; | |
| 2273 below = curwin->w_filler_rows; | |
| 2274 #endif | |
| 2275 while ((above < above_wanted || below < below_wanted) && topline < botline) | |
| 2276 { | |
| 2277 if (below < below_wanted && (below <= above || above >= above_wanted)) | |
| 2278 { | |
| 2279 #ifdef FEAT_FOLDING | |
| 2280 if (hasFolding(botline, &botline, NULL)) | |
| 2281 ++below; | |
| 2282 else | |
| 2283 #endif | |
| 2284 below += plines(botline); | |
| 2285 --botline; | |
| 2286 } | |
| 2287 if (above < above_wanted && (above < below || below >= below_wanted)) | |
| 2288 { | |
| 2289 #ifdef FEAT_FOLDING | |
| 2290 if (hasFolding(topline, NULL, &topline)) | |
| 2291 ++above; | |
| 2292 else | |
| 2293 #endif | |
| 2294 #ifndef FEAT_DIFF | |
| 2295 above += plines(topline); | |
| 2296 #else | |
| 2297 above += plines_nofill(topline); | |
| 2298 | |
| 2299 /* Count filler lines below this line as context. */ | |
| 2300 if (topline < botline) | |
| 2301 above += diff_check_fill(curwin, topline + 1); | |
| 2302 #endif | |
| 2303 ++topline; | |
| 2304 } | |
| 2305 } | |
| 2306 if (topline == botline || botline == 0) | |
| 2307 curwin->w_cursor.lnum = topline; | |
| 2308 else if (topline > botline) | |
| 2309 curwin->w_cursor.lnum = botline; | |
| 2310 else | |
| 2311 { | |
| 2312 if (cln < topline && curwin->w_topline > 1) | |
| 2313 { | |
| 2314 curwin->w_cursor.lnum = topline; | |
| 2315 curwin->w_valid &= | |
| 2316 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW); | |
| 2317 } | |
| 2318 if (cln > botline && curwin->w_botline <= curbuf->b_ml.ml_line_count) | |
| 2319 { | |
| 2320 curwin->w_cursor.lnum = botline; | |
| 2321 curwin->w_valid &= | |
| 2322 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW); | |
| 2323 } | |
| 2324 } | |
| 2325 curwin->w_valid |= VALID_TOPLINE; | |
| 2326 } | |
| 2327 | |
| 2328 static void get_scroll_overlap __ARGS((lineoff_T *lp, int dir)); | |
| 2329 | |
| 2330 /* | |
| 2331 * move screen 'count' pages up or down and update screen | |
| 2332 * | |
| 2333 * return FAIL for failure, OK otherwise | |
| 2334 */ | |
| 2335 int | |
| 2336 onepage(dir, count) | |
| 2337 int dir; | |
| 2338 long count; | |
| 2339 { | |
| 2340 long n; | |
| 2341 int retval = OK; | |
| 2342 lineoff_T loff; | |
| 2343 linenr_T old_topline = curwin->w_topline; | |
| 2344 | |
| 2345 if (curbuf->b_ml.ml_line_count == 1) /* nothing to do */ | |
| 2346 { | |
| 2347 beep_flush(); | |
| 2348 return FAIL; | |
| 2349 } | |
| 2350 | |
| 2351 for ( ; count > 0; --count) | |
| 2352 { | |
| 2353 validate_botline(); | |
| 2354 /* | |
| 2355 * It's an error to move a page up when the first line is already on | |
| 2356 * the screen. It's an error to move a page down when the last line | |
| 2357 * is on the screen and the topline is 'scrolloff' lines from the | |
| 2358 * last line. | |
| 2359 */ | |
| 2360 if (dir == FORWARD | |
| 2361 ? ((curwin->w_topline >= curbuf->b_ml.ml_line_count - p_so) | |
| 2362 && curwin->w_botline > curbuf->b_ml.ml_line_count) | |
| 2363 : (curwin->w_topline == 1 | |
| 2364 #ifdef FEAT_DIFF | |
| 2365 && curwin->w_topfill == | |
| 2366 diff_check_fill(curwin, curwin->w_topline) | |
| 2367 #endif | |
| 2368 )) | |
| 2369 { | |
| 2370 beep_flush(); | |
| 2371 retval = FAIL; | |
| 2372 break; | |
| 2373 } | |
| 2374 | |
| 2375 #ifdef FEAT_DIFF | |
| 2376 loff.fill = 0; | |
| 2377 #endif | |
| 2378 if (dir == FORWARD) | |
| 2379 { | |
| 164 | 2380 if (firstwin == lastwin && p_window > 0 && p_window < Rows - 1) |
| 7 | 2381 { |
| 164 | 2382 /* Vi compatible scrolling */ |
| 2383 if (p_window <= 2) | |
| 2384 ++curwin->w_topline; | |
| 2385 else | |
| 2386 curwin->w_topline += p_window - 2; | |
| 2387 if (curwin->w_topline > curbuf->b_ml.ml_line_count) | |
| 2388 curwin->w_topline = curbuf->b_ml.ml_line_count; | |
| 2389 curwin->w_cursor.lnum = curwin->w_topline; | |
| 2390 } | |
| 2391 else if (curwin->w_botline > curbuf->b_ml.ml_line_count) | |
| 2392 { | |
| 2393 /* at end of file */ | |
| 7 | 2394 curwin->w_topline = curbuf->b_ml.ml_line_count; |
| 2395 #ifdef FEAT_DIFF | |
| 2396 curwin->w_topfill = 0; | |
| 2397 #endif | |
| 2398 curwin->w_valid &= ~(VALID_WROW|VALID_CROW); | |
| 2399 } | |
| 2400 else | |
| 2401 { | |
| 2402 /* For the overlap, start with the line just below the window | |
| 2403 * and go upwards. */ | |
| 2404 loff.lnum = curwin->w_botline; | |
| 2405 #ifdef FEAT_DIFF | |
| 2406 loff.fill = diff_check_fill(curwin, loff.lnum) | |
| 2407 - curwin->w_filler_rows; | |
| 2408 #endif | |
| 2409 get_scroll_overlap(&loff, -1); | |
| 2410 curwin->w_topline = loff.lnum; | |
| 2411 #ifdef FEAT_DIFF | |
| 2412 curwin->w_topfill = loff.fill; | |
| 2413 check_topfill(curwin, FALSE); | |
| 2414 #endif | |
| 2415 curwin->w_cursor.lnum = curwin->w_topline; | |
| 2416 curwin->w_valid &= ~(VALID_WCOL|VALID_CHEIGHT|VALID_WROW| | |
| 2417 VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 2418 } | |
| 2419 } | |
| 2420 else /* dir == BACKWARDS */ | |
| 2421 { | |
| 2422 #ifdef FEAT_DIFF | |
| 2423 if (curwin->w_topline == 1) | |
| 2424 { | |
| 2425 /* Include max number of filler lines */ | |
| 2426 max_topfill(); | |
| 2427 continue; | |
| 2428 } | |
| 2429 #endif | |
| 164 | 2430 if (firstwin == lastwin && p_window > 0 && p_window < Rows - 1) |
| 2431 { | |
| 2432 /* Vi compatible scrolling (sort of) */ | |
| 2433 if (p_window <= 2) | |
| 2434 --curwin->w_topline; | |
| 2435 else | |
| 2436 curwin->w_topline -= p_window - 2; | |
| 2437 if (curwin->w_topline < 1) | |
| 2438 curwin->w_topline = 1; | |
| 2439 curwin->w_cursor.lnum = curwin->w_topline + p_window - 1; | |
| 2440 if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count) | |
| 2441 curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count; | |
| 2442 continue; | |
| 2443 } | |
| 2444 | |
| 7 | 2445 /* Find the line at the top of the window that is going to be the |
| 2446 * line at the bottom of the window. Make sure this results in | |
| 2447 * the same line as before doing CTRL-F. */ | |
| 2448 loff.lnum = curwin->w_topline - 1; | |
| 2449 #ifdef FEAT_DIFF | |
| 2450 loff.fill = diff_check_fill(curwin, loff.lnum + 1) | |
| 2451 - curwin->w_topfill; | |
| 2452 #endif | |
| 2453 get_scroll_overlap(&loff, 1); | |
| 2454 | |
| 2455 if (loff.lnum >= curbuf->b_ml.ml_line_count) | |
| 2456 { | |
| 2457 loff.lnum = curbuf->b_ml.ml_line_count; | |
| 2458 #ifdef FEAT_DIFF | |
| 2459 loff.fill = 0; | |
| 2460 } | |
| 2461 else | |
| 2462 { | |
| 2463 botline_topline(&loff); | |
| 2464 #endif | |
| 2465 } | |
| 2466 curwin->w_cursor.lnum = loff.lnum; | |
| 2467 | |
| 2468 /* Find the line just above the new topline to get the right line | |
| 2469 * at the bottom of the window. */ | |
| 2470 n = 0; | |
| 2471 while (n <= curwin->w_height && loff.lnum >= 1) | |
| 2472 { | |
| 2473 topline_back(&loff); | |
|
2082
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2474 if (loff.height == MAXCOL) |
|
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2475 n = MAXCOL; |
|
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2476 else |
|
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2477 n += loff.height; |
| 7 | 2478 } |
|
2082
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2479 if (loff.lnum < 1) /* at begin of file */ |
| 7 | 2480 { |
| 2481 curwin->w_topline = 1; | |
| 2482 #ifdef FEAT_DIFF | |
| 2483 max_topfill(); | |
| 2484 #endif | |
| 2485 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 2486 } | |
| 2487 else | |
| 2488 { | |
| 2489 /* Go two lines forward again. */ | |
| 2490 #ifdef FEAT_DIFF | |
| 2491 topline_botline(&loff); | |
| 2492 #endif | |
| 2493 botline_forw(&loff); | |
| 2494 botline_forw(&loff); | |
| 2495 #ifdef FEAT_DIFF | |
| 2496 botline_topline(&loff); | |
| 2497 #endif | |
| 2498 #ifdef FEAT_FOLDING | |
| 2499 /* We're at the wrong end of a fold now. */ | |
| 2500 (void)hasFolding(loff.lnum, &loff.lnum, NULL); | |
| 2501 #endif | |
| 2502 | |
| 2503 /* Always scroll at least one line. Avoid getting stuck on | |
| 2504 * very long lines. */ | |
| 2505 if (loff.lnum >= curwin->w_topline | |
| 2506 #ifdef FEAT_DIFF | |
| 2507 && (loff.lnum > curwin->w_topline | |
| 2508 || loff.fill >= curwin->w_topfill) | |
| 2509 #endif | |
| 2510 ) | |
| 2511 { | |
| 2512 #ifdef FEAT_DIFF | |
| 2513 /* First try using the maximum number of filler lines. If | |
| 2514 * that's not enough, backup one line. */ | |
| 2515 loff.fill = curwin->w_topfill; | |
| 2516 if (curwin->w_topfill < diff_check_fill(curwin, | |
| 2517 curwin->w_topline)) | |
| 2518 max_topfill(); | |
| 2519 if (curwin->w_topfill == loff.fill) | |
| 2520 #endif | |
| 2521 { | |
| 2522 --curwin->w_topline; | |
| 2523 #ifdef FEAT_DIFF | |
| 2524 curwin->w_topfill = 0; | |
| 2525 #endif | |
| 2526 } | |
| 2527 comp_botline(curwin); | |
| 2528 curwin->w_cursor.lnum = curwin->w_botline - 1; | |
| 5764 | 2529 curwin->w_valid &= |
| 2530 ~(VALID_WCOL|VALID_CHEIGHT|VALID_WROW|VALID_CROW); | |
| 7 | 2531 } |
| 2532 else | |
| 2533 { | |
| 2534 curwin->w_topline = loff.lnum; | |
| 2535 #ifdef FEAT_DIFF | |
| 2536 curwin->w_topfill = loff.fill; | |
| 2537 check_topfill(curwin, FALSE); | |
| 2538 #endif | |
| 2539 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 2540 } | |
| 2541 } | |
| 2542 } | |
| 2543 } | |
| 2544 #ifdef FEAT_FOLDING | |
| 2545 foldAdjustCursor(); | |
| 2546 #endif | |
| 2547 cursor_correct(); | |
| 161 | 2548 if (retval == OK) |
| 2549 beginline(BL_SOL | BL_FIX); | |
| 7 | 2550 curwin->w_valid &= ~(VALID_WCOL|VALID_WROW|VALID_VIRTCOL); |
| 2551 | |
| 2552 /* | |
| 2553 * Avoid the screen jumping up and down when 'scrolloff' is non-zero. | |
| 2554 * But make sure we scroll at least one line (happens with mix of long | |
| 2555 * wrapping lines and non-wrapping line). | |
| 2556 */ | |
| 2557 if (retval == OK && dir == FORWARD && check_top_offset()) | |
| 2558 { | |
| 2559 scroll_cursor_top(1, FALSE); | |
| 2560 if (curwin->w_topline <= old_topline | |
| 2561 && old_topline < curbuf->b_ml.ml_line_count) | |
| 2562 { | |
| 2563 curwin->w_topline = old_topline + 1; | |
| 2564 #ifdef FEAT_FOLDING | |
| 2565 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 2566 #endif | |
| 2567 } | |
| 2568 } | |
| 2569 | |
| 2570 redraw_later(VALID); | |
| 2571 return retval; | |
| 2572 } | |
| 2573 | |
| 2574 /* | |
| 2575 * Decide how much overlap to use for page-up or page-down scrolling. | |
| 2576 * This is symmetric, so that doing both keeps the same lines displayed. | |
| 2577 * Three lines are examined: | |
| 2578 * | |
| 2579 * before CTRL-F after CTRL-F / before CTRL-B | |
| 2580 * etc. l1 | |
| 2581 * l1 last but one line ------------ | |
| 2582 * l2 last text line l2 top text line | |
| 2583 * ------------- l3 second text line | |
| 2584 * l3 etc. | |
| 2585 */ | |
| 2586 static void | |
| 2587 get_scroll_overlap(lp, dir) | |
| 2588 lineoff_T *lp; | |
| 2589 int dir; | |
| 2590 { | |
| 2591 int h1, h2, h3, h4; | |
| 2592 int min_height = curwin->w_height - 2; | |
| 2593 lineoff_T loff0, loff1, loff2; | |
| 2594 | |
| 2595 #ifdef FEAT_DIFF | |
| 2596 if (lp->fill > 0) | |
| 2597 lp->height = 1; | |
| 2598 else | |
| 2599 lp->height = plines_nofill(lp->lnum); | |
| 2600 #else | |
| 2601 lp->height = plines(lp->lnum); | |
| 2602 #endif | |
| 2603 h1 = lp->height; | |
| 2604 if (h1 > min_height) | |
| 2605 return; /* no overlap */ | |
| 2606 | |
| 2607 loff0 = *lp; | |
| 2608 if (dir > 0) | |
| 2609 botline_forw(lp); | |
| 2610 else | |
| 2611 topline_back(lp); | |
| 2612 h2 = lp->height; | |
| 3968 | 2613 if (h2 == MAXCOL || h2 + h1 > min_height) |
| 7 | 2614 { |
| 2615 *lp = loff0; /* no overlap */ | |
| 2616 return; | |
| 2617 } | |
| 2618 | |
| 2619 loff1 = *lp; | |
| 2620 if (dir > 0) | |
| 2621 botline_forw(lp); | |
| 2622 else | |
| 2623 topline_back(lp); | |
| 2624 h3 = lp->height; | |
| 3968 | 2625 if (h3 == MAXCOL || h3 + h2 > min_height) |
| 7 | 2626 { |
| 2627 *lp = loff0; /* no overlap */ | |
| 2628 return; | |
| 2629 } | |
| 2630 | |
| 2631 loff2 = *lp; | |
| 2632 if (dir > 0) | |
| 2633 botline_forw(lp); | |
| 2634 else | |
| 2635 topline_back(lp); | |
| 2636 h4 = lp->height; | |
| 3968 | 2637 if (h4 == MAXCOL || h4 + h3 + h2 > min_height || h3 + h2 + h1 > min_height) |
| 7 | 2638 *lp = loff1; /* 1 line overlap */ |
| 2639 else | |
| 2640 *lp = loff2; /* 2 lines overlap */ | |
| 2641 return; | |
| 2642 } | |
| 2643 | |
| 2644 /* #define KEEP_SCREEN_LINE */ | |
| 2645 /* | |
| 2646 * Scroll 'scroll' lines up or down. | |
| 2647 */ | |
| 2648 void | |
| 2649 halfpage(flag, Prenum) | |
| 2650 int flag; | |
| 2651 linenr_T Prenum; | |
| 2652 { | |
| 2653 long scrolled = 0; | |
| 2654 int i; | |
| 2655 int n; | |
| 2656 int room; | |
| 2657 | |
| 2658 if (Prenum) | |
| 2659 curwin->w_p_scr = (Prenum > curwin->w_height) ? | |
| 2660 curwin->w_height : Prenum; | |
| 2661 n = (curwin->w_p_scr <= curwin->w_height) ? | |
| 2662 curwin->w_p_scr : curwin->w_height; | |
| 2663 | |
| 2664 validate_botline(); | |
| 2665 room = curwin->w_empty_rows; | |
| 2666 #ifdef FEAT_DIFF | |
| 2667 room += curwin->w_filler_rows; | |
| 2668 #endif | |
| 2669 if (flag) | |
| 2670 { | |
| 2671 /* | |
| 2672 * scroll the text up | |
| 2673 */ | |
| 2674 while (n > 0 && curwin->w_botline <= curbuf->b_ml.ml_line_count) | |
| 2675 { | |
| 2676 #ifdef FEAT_DIFF | |
| 2677 if (curwin->w_topfill > 0) | |
| 2678 { | |
| 2679 i = 1; | |
| 2680 if (--n < 0 && scrolled > 0) | |
| 2681 break; | |
| 2682 --curwin->w_topfill; | |
| 2683 } | |
| 2684 else | |
| 2685 #endif | |
| 2686 { | |
| 2687 #ifdef FEAT_DIFF | |
| 2688 i = plines_nofill(curwin->w_topline); | |
| 2689 #else | |
| 2690 i = plines(curwin->w_topline); | |
| 2691 #endif | |
| 2692 n -= i; | |
| 2693 if (n < 0 && scrolled > 0) | |
| 2694 break; | |
| 2695 #ifdef FEAT_FOLDING | |
| 2696 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline); | |
| 2697 #endif | |
| 2698 ++curwin->w_topline; | |
| 2699 #ifdef FEAT_DIFF | |
| 2700 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline); | |
| 2701 #endif | |
| 2702 | |
| 2703 #ifndef KEEP_SCREEN_LINE | |
| 2704 if (curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count) | |
| 2705 { | |
| 2706 ++curwin->w_cursor.lnum; | |
| 2707 curwin->w_valid &= | |
| 2708 ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL); | |
| 2709 } | |
| 2710 #endif | |
| 2711 } | |
| 2712 curwin->w_valid &= ~(VALID_CROW|VALID_WROW); | |
| 2713 scrolled += i; | |
| 2714 | |
| 2715 /* | |
| 2716 * Correct w_botline for changed w_topline. | |
| 2717 * Won't work when there are filler lines. | |
| 2718 */ | |
| 2719 #ifdef FEAT_DIFF | |
| 2720 if (curwin->w_p_diff) | |
| 2721 curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 2722 else | |
| 2723 #endif | |
| 2724 { | |
| 2725 room += i; | |
| 2726 do | |
| 2727 { | |
| 2728 i = plines(curwin->w_botline); | |
| 2729 if (i > room) | |
| 2730 break; | |
| 2731 #ifdef FEAT_FOLDING | |
| 2732 (void)hasFolding(curwin->w_botline, NULL, | |
| 2733 &curwin->w_botline); | |
| 2734 #endif | |
| 2735 ++curwin->w_botline; | |
| 2736 room -= i; | |
| 2737 } while (curwin->w_botline <= curbuf->b_ml.ml_line_count); | |
| 2738 } | |
| 2739 } | |
| 2740 | |
| 2741 #ifndef KEEP_SCREEN_LINE | |
| 2742 /* | |
| 2743 * When hit bottom of the file: move cursor down. | |
| 2744 */ | |
| 2745 if (n > 0) | |
| 2746 { | |
| 2747 # ifdef FEAT_FOLDING | |
| 2748 if (hasAnyFolding(curwin)) | |
| 2749 { | |
| 2750 while (--n >= 0 | |
| 2751 && curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count) | |
| 2752 { | |
| 2753 (void)hasFolding(curwin->w_cursor.lnum, NULL, | |
| 2754 &curwin->w_cursor.lnum); | |
| 2755 ++curwin->w_cursor.lnum; | |
| 2756 } | |
| 2757 } | |
| 2758 else | |
| 2759 # endif | |
| 2760 curwin->w_cursor.lnum += n; | |
| 2761 check_cursor_lnum(); | |
| 2762 } | |
| 2763 #else | |
| 2764 /* try to put the cursor in the same screen line */ | |
| 2765 while ((curwin->w_cursor.lnum < curwin->w_topline || scrolled > 0) | |
| 2766 && curwin->w_cursor.lnum < curwin->w_botline - 1) | |
| 2767 { | |
| 2768 scrolled -= plines(curwin->w_cursor.lnum); | |
| 2769 if (scrolled < 0 && curwin->w_cursor.lnum >= curwin->w_topline) | |
| 2770 break; | |
| 2771 # ifdef FEAT_FOLDING | |
| 2772 (void)hasFolding(curwin->w_cursor.lnum, NULL, | |
| 2773 &curwin->w_cursor.lnum); | |
| 2774 # endif | |
| 2775 ++curwin->w_cursor.lnum; | |
| 2776 } | |
| 2777 #endif | |
| 2778 } | |
| 2779 else | |
| 2780 { | |
| 2781 /* | |
| 2782 * scroll the text down | |
| 2783 */ | |
| 2784 while (n > 0 && curwin->w_topline > 1) | |
| 2785 { | |
| 2786 #ifdef FEAT_DIFF | |
| 2787 if (curwin->w_topfill < diff_check_fill(curwin, curwin->w_topline)) | |
| 2788 { | |
| 2789 i = 1; | |
| 2790 if (--n < 0 && scrolled > 0) | |
| 2791 break; | |
| 2792 ++curwin->w_topfill; | |
| 2793 } | |
| 2794 else | |
| 2795 #endif | |
| 2796 { | |
| 2797 #ifdef FEAT_DIFF | |
| 2798 i = plines_nofill(curwin->w_topline - 1); | |
| 2799 #else | |
| 2800 i = plines(curwin->w_topline - 1); | |
| 2801 #endif | |
| 2802 n -= i; | |
| 2803 if (n < 0 && scrolled > 0) | |
| 2804 break; | |
| 2805 --curwin->w_topline; | |
| 2806 #ifdef FEAT_FOLDING | |
| 2807 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 2808 #endif | |
| 2809 #ifdef FEAT_DIFF | |
| 2810 curwin->w_topfill = 0; | |
| 2811 #endif | |
| 2812 } | |
| 2813 curwin->w_valid &= ~(VALID_CROW|VALID_WROW| | |
| 2814 VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 2815 scrolled += i; | |
| 2816 #ifndef KEEP_SCREEN_LINE | |
| 2817 if (curwin->w_cursor.lnum > 1) | |
| 2818 { | |
| 2819 --curwin->w_cursor.lnum; | |
| 2820 curwin->w_valid &= ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL); | |
| 2821 } | |
| 2822 #endif | |
| 2823 } | |
| 2824 #ifndef KEEP_SCREEN_LINE | |
| 2825 /* | |
| 2826 * When hit top of the file: move cursor up. | |
| 2827 */ | |
| 2828 if (n > 0) | |
| 2829 { | |
| 2830 if (curwin->w_cursor.lnum <= (linenr_T)n) | |
| 2831 curwin->w_cursor.lnum = 1; | |
| 2832 else | |
| 2833 # ifdef FEAT_FOLDING | |
| 2834 if (hasAnyFolding(curwin)) | |
| 2835 { | |
| 2836 while (--n >= 0 && curwin->w_cursor.lnum > 1) | |
| 2837 { | |
| 2838 --curwin->w_cursor.lnum; | |
| 2839 (void)hasFolding(curwin->w_cursor.lnum, | |
| 2840 &curwin->w_cursor.lnum, NULL); | |
| 2841 } | |
| 2842 } | |
| 2843 else | |
| 2844 # endif | |
| 2845 curwin->w_cursor.lnum -= n; | |
| 2846 } | |
| 2847 #else | |
| 2848 /* try to put the cursor in the same screen line */ | |
| 2849 scrolled += n; /* move cursor when topline is 1 */ | |
| 2850 while (curwin->w_cursor.lnum > curwin->w_topline | |
| 2851 && (scrolled > 0 || curwin->w_cursor.lnum >= curwin->w_botline)) | |
| 2852 { | |
| 2853 scrolled -= plines(curwin->w_cursor.lnum - 1); | |
| 2854 if (scrolled < 0 && curwin->w_cursor.lnum < curwin->w_botline) | |
| 2855 break; | |
| 2856 --curwin->w_cursor.lnum; | |
| 2857 # ifdef FEAT_FOLDING | |
| 2858 foldAdjustCursor(); | |
| 2859 # endif | |
| 2860 } | |
| 2861 #endif | |
| 2862 } | |
| 2863 # ifdef FEAT_FOLDING | |
| 2864 /* Move cursor to first line of closed fold. */ | |
| 2865 foldAdjustCursor(); | |
| 2866 # endif | |
| 2867 #ifdef FEAT_DIFF | |
| 2868 check_topfill(curwin, !flag); | |
| 2869 #endif | |
| 2870 cursor_correct(); | |
| 2871 beginline(BL_SOL | BL_FIX); | |
| 2872 redraw_later(VALID); | |
| 2873 } | |
|
2250
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Add the conceal patch from Vince Negri.
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|
2874 |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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|
2875 #if defined(FEAT_CURSORBIND) || defined(PROTO) |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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|
2876 void |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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|
2877 do_check_cursorbind() |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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|
2878 { |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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diff
changeset
|
2879 linenr_T line = curwin->w_cursor.lnum; |
| 3415 | 2880 colnr_T col = curwin->w_cursor.col; |
| 2881 # ifdef FEAT_VIRTUALEDIT | |
| 2882 colnr_T coladd = curwin->w_cursor.coladd; | |
| 2883 # endif | |
| 3433 | 2884 colnr_T curswant = curwin->w_curswant; |
| 2885 int set_curswant = curwin->w_set_curswant; | |
|
2250
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Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
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diff
changeset
|
2886 win_T *old_curwin = curwin; |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
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diff
changeset
|
2887 buf_T *old_curbuf = curbuf; |
| 2693 | 2888 int restart_edit_save; |
|
2250
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Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
2210
diff
changeset
|
2889 int old_VIsual_select = VIsual_select; |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
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diff
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|
2890 int old_VIsual_active = VIsual_active; |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
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diff
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|
2891 |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
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diff
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|
2892 /* |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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diff
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|
2893 * loop through the cursorbound windows |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
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diff
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|
2894 */ |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
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diff
changeset
|
2895 VIsual_select = VIsual_active = 0; |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
2210
diff
changeset
|
2896 for (curwin = firstwin; curwin; curwin = curwin->w_next) |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
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diff
changeset
|
2897 { |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
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diff
changeset
|
2898 curbuf = curwin->w_buffer; |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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diff
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|
2899 /* skip original window and windows with 'noscrollbind' */ |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
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diff
changeset
|
2900 if (curwin != old_curwin && curwin->w_p_crb) |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
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diff
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|
2901 { |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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diff
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|
2902 # ifdef FEAT_DIFF |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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|
2903 if (curwin->w_p_diff) |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
2210
diff
changeset
|
2904 curwin->w_cursor.lnum |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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diff
changeset
|
2905 = diff_get_corresponding_line(old_curbuf, |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
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diff
changeset
|
2906 line, |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
2210
diff
changeset
|
2907 curbuf, |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
Bram Moolenaar <bram@vim.org>
parents:
2210
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|
2908 curwin->w_cursor.lnum); |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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diff
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|
2909 else |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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diff
changeset
|
2910 # endif |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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|
2911 curwin->w_cursor.lnum = line; |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
2210
diff
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|
2912 curwin->w_cursor.col = col; |
| 3415 | 2913 # ifdef FEAT_VIRTUALEDIT |
| 2914 curwin->w_cursor.coladd = coladd; | |
| 2915 # endif | |
| 3433 | 2916 curwin->w_curswant = curswant; |
| 2917 curwin->w_set_curswant = set_curswant; | |
|
2250
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diff
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|
2918 |
| 2693 | 2919 /* Make sure the cursor is in a valid position. Temporarily set |
| 2920 * "restart_edit" to allow the cursor to be beyond the EOL. */ | |
| 2921 restart_edit_save = restart_edit; | |
| 2922 restart_edit = TRUE; | |
|
2250
1bac28a53fae
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diff
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|
2923 check_cursor(); |
| 2693 | 2924 restart_edit = restart_edit_save; |
|
2250
1bac28a53fae
Add the conceal patch from Vince Negri.
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|
2925 # ifdef FEAT_MBYTE |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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|
2926 /* Correct cursor for multi-byte character. */ |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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|
2927 if (has_mbyte) |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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diff
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|
2928 mb_adjust_cursor(); |
|
1bac28a53fae
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|
2929 # endif |
| 2688 | 2930 redraw_later(VALID); |
|
2250
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|
2931 |
| 2688 | 2932 /* Only scroll when 'scrollbind' hasn't done this. */ |
| 2933 if (!curwin->w_p_scb) | |
| 2934 update_topline(); | |
|
2250
1bac28a53fae
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|
2935 # ifdef FEAT_WINDOWS |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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|
2936 curwin->w_redr_status = TRUE; |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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|
2937 # endif |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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diff
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|
2938 } |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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diff
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|
2939 } |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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|
2940 |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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diff
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|
2941 /* |
|
1bac28a53fae
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parents:
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|
2942 * reset current-window |
|
1bac28a53fae
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|
2943 */ |
|
1bac28a53fae
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|
2944 VIsual_select = old_VIsual_select; |
|
1bac28a53fae
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|
2945 VIsual_active = old_VIsual_active; |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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|
2946 curwin = old_curwin; |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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|
2947 curbuf = old_curbuf; |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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parents:
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|
2948 } |
|
1bac28a53fae
Add the conceal patch from Vince Negri.
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changeset
|
2949 #endif /* FEAT_CURSORBIND */ |