Mercurial > vim
annotate src/move.c @ 2154:7c8c7c95a865 vim73
First step in the Vim 7.3 branch. Changed version numbers.
| author | Bram Moolenaar <bram@zimbu.org> |
|---|---|
| date | Sat, 15 May 2010 13:56:02 +0200 |
| parents | 8ca3c9ad0bee |
| children | 733f0dc510c3 c6f1aa1e9f32 |
| 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)); | |
| 532 | 23 static int scrolljump_value __ARGS((void)); |
| 7 | 24 static int check_top_offset __ARGS((void)); |
| 25 static void curs_rows __ARGS((win_T *wp, int do_botline)); | |
| 26 static void validate_botline_win __ARGS((win_T *wp)); | |
| 27 static void validate_cheight __ARGS((void)); | |
| 28 | |
| 29 typedef struct | |
| 30 { | |
| 31 linenr_T lnum; /* line number */ | |
| 32 #ifdef FEAT_DIFF | |
| 33 int fill; /* filler lines */ | |
| 34 #endif | |
| 35 int height; /* height of added line */ | |
| 36 } lineoff_T; | |
| 37 | |
| 38 static void topline_back __ARGS((lineoff_T *lp)); | |
| 39 static void botline_forw __ARGS((lineoff_T *lp)); | |
| 40 #ifdef FEAT_DIFF | |
| 41 static void botline_topline __ARGS((lineoff_T *lp)); | |
| 42 static void topline_botline __ARGS((lineoff_T *lp)); | |
| 43 static void max_topfill __ARGS((void)); | |
| 44 #endif | |
| 45 | |
| 46 /* | |
| 47 * Compute wp->w_botline for the current wp->w_topline. Can be called after | |
| 48 * wp->w_topline changed. | |
| 49 */ | |
| 50 static void | |
| 51 comp_botline(wp) | |
| 52 win_T *wp; | |
| 53 { | |
| 54 int n; | |
| 55 linenr_T lnum; | |
| 56 int done; | |
| 57 #ifdef FEAT_FOLDING | |
| 58 linenr_T last; | |
| 59 int folded; | |
| 60 #endif | |
| 61 | |
| 62 /* | |
| 63 * If w_cline_row is valid, start there. | |
| 64 * Otherwise have to start at w_topline. | |
| 65 */ | |
| 66 check_cursor_moved(wp); | |
| 67 if (wp->w_valid & VALID_CROW) | |
| 68 { | |
| 69 lnum = wp->w_cursor.lnum; | |
| 70 done = wp->w_cline_row; | |
| 71 } | |
| 72 else | |
| 73 { | |
| 74 lnum = wp->w_topline; | |
| 75 done = 0; | |
| 76 } | |
| 77 | |
| 78 for ( ; lnum <= wp->w_buffer->b_ml.ml_line_count; ++lnum) | |
| 79 { | |
| 80 #ifdef FEAT_FOLDING | |
| 81 last = lnum; | |
| 82 folded = FALSE; | |
| 83 if (hasFoldingWin(wp, lnum, NULL, &last, TRUE, NULL)) | |
| 84 { | |
| 85 n = 1; | |
| 86 folded = TRUE; | |
| 87 } | |
| 88 else | |
| 89 #endif | |
| 90 #ifdef FEAT_DIFF | |
| 91 if (lnum == wp->w_topline) | |
| 92 n = plines_win_nofill(wp, lnum, TRUE) + wp->w_topfill; | |
| 93 else | |
| 94 #endif | |
| 95 n = plines_win(wp, lnum, TRUE); | |
| 96 if ( | |
| 97 #ifdef FEAT_FOLDING | |
| 98 lnum <= wp->w_cursor.lnum && last >= wp->w_cursor.lnum | |
| 99 #else | |
| 100 lnum == wp->w_cursor.lnum | |
| 101 #endif | |
| 102 ) | |
| 103 { | |
| 104 wp->w_cline_row = done; | |
| 105 wp->w_cline_height = n; | |
| 106 #ifdef FEAT_FOLDING | |
| 107 wp->w_cline_folded = folded; | |
| 108 #endif | |
| 109 wp->w_valid |= (VALID_CROW|VALID_CHEIGHT); | |
| 110 } | |
| 111 if (done + n > wp->w_height) | |
| 112 break; | |
| 113 done += n; | |
| 114 #ifdef FEAT_FOLDING | |
| 115 lnum = last; | |
| 116 #endif | |
| 117 } | |
| 118 | |
| 119 /* wp->w_botline is the line that is just below the window */ | |
| 120 wp->w_botline = lnum; | |
| 121 wp->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP; | |
| 122 | |
| 123 set_empty_rows(wp, done); | |
| 124 } | |
| 125 | |
| 126 /* | |
| 127 * Update curwin->w_topline and redraw if necessary. | |
| 128 * Used to update the screen before printing a message. | |
| 129 */ | |
| 130 void | |
| 131 update_topline_redraw() | |
| 132 { | |
| 133 update_topline(); | |
| 134 if (must_redraw) | |
| 135 update_screen(0); | |
| 136 } | |
| 137 | |
| 138 /* | |
| 139 * Update curwin->w_topline to move the cursor onto the screen. | |
| 140 */ | |
| 141 void | |
| 142 update_topline() | |
| 143 { | |
| 144 long line_count; | |
| 145 int halfheight; | |
| 146 int n; | |
| 147 linenr_T old_topline; | |
| 148 #ifdef FEAT_DIFF | |
| 149 int old_topfill; | |
| 150 #endif | |
| 151 #ifdef FEAT_FOLDING | |
| 152 linenr_T lnum; | |
| 153 #endif | |
| 154 int check_topline = FALSE; | |
| 155 int check_botline = FALSE; | |
| 156 #ifdef FEAT_MOUSE | |
| 157 int save_so = p_so; | |
| 158 #endif | |
| 159 | |
| 160 if (!screen_valid(TRUE)) | |
| 161 return; | |
| 162 | |
| 163 check_cursor_moved(curwin); | |
| 164 if (curwin->w_valid & VALID_TOPLINE) | |
| 165 return; | |
| 166 | |
| 167 #ifdef FEAT_MOUSE | |
| 168 /* When dragging with the mouse, don't scroll that quickly */ | |
| 1121 | 169 if (mouse_dragging > 0) |
| 7 | 170 p_so = mouse_dragging - 1; |
| 171 #endif | |
| 172 | |
| 173 old_topline = curwin->w_topline; | |
| 174 #ifdef FEAT_DIFF | |
| 175 old_topfill = curwin->w_topfill; | |
| 176 #endif | |
| 177 | |
| 178 /* | |
| 179 * If the buffer is empty, always set topline to 1. | |
| 180 */ | |
| 181 if (bufempty()) /* special case - file is empty */ | |
| 182 { | |
| 183 if (curwin->w_topline != 1) | |
| 184 redraw_later(NOT_VALID); | |
| 185 curwin->w_topline = 1; | |
| 186 curwin->w_botline = 2; | |
| 187 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP; | |
| 188 #ifdef FEAT_SCROLLBIND | |
| 189 curwin->w_scbind_pos = 1; | |
| 190 #endif | |
| 191 } | |
| 192 | |
| 193 /* | |
| 194 * If the cursor is above or near the top of the window, scroll the window | |
| 195 * to show the line the cursor is in, with 'scrolloff' context. | |
| 196 */ | |
| 197 else | |
| 198 { | |
| 199 if (curwin->w_topline > 1) | |
| 200 { | |
| 201 /* If the cursor is above topline, scrolling is always needed. | |
| 202 * If the cursor is far below topline and there is no folding, | |
| 203 * scrolling down is never needed. */ | |
| 204 if (curwin->w_cursor.lnum < curwin->w_topline) | |
| 205 check_topline = TRUE; | |
| 206 else if (check_top_offset()) | |
| 207 check_topline = TRUE; | |
| 208 } | |
| 209 #ifdef FEAT_DIFF | |
| 210 /* Check if there are more filler lines than allowed. */ | |
| 211 if (!check_topline && curwin->w_topfill > diff_check_fill(curwin, | |
| 212 curwin->w_topline)) | |
| 213 check_topline = TRUE; | |
| 214 #endif | |
| 215 | |
| 216 if (check_topline) | |
| 217 { | |
| 218 halfheight = curwin->w_height / 2 - 1; | |
| 219 if (halfheight < 2) | |
| 220 halfheight = 2; | |
| 221 | |
| 222 #ifdef FEAT_FOLDING | |
| 223 if (hasAnyFolding(curwin)) | |
| 224 { | |
| 225 /* Count the number of logical lines between the cursor and | |
| 226 * topline + p_so (approximation of how much will be | |
| 227 * scrolled). */ | |
| 228 n = 0; | |
| 229 for (lnum = curwin->w_cursor.lnum; | |
| 230 lnum < curwin->w_topline + p_so; ++lnum) | |
| 231 { | |
| 232 ++n; | |
| 233 /* stop at end of file or when we know we are far off */ | |
| 234 if (lnum >= curbuf->b_ml.ml_line_count || n >= halfheight) | |
| 235 break; | |
| 236 (void)hasFolding(lnum, NULL, &lnum); | |
| 237 } | |
| 238 } | |
| 239 else | |
| 240 #endif | |
| 241 n = curwin->w_topline + p_so - curwin->w_cursor.lnum; | |
| 242 | |
| 243 /* If we weren't very close to begin with, we scroll to put the | |
| 244 * cursor in the middle of the window. Otherwise put the cursor | |
| 245 * near the top of the window. */ | |
| 246 if (n >= halfheight) | |
| 247 scroll_cursor_halfway(FALSE); | |
| 248 else | |
| 249 { | |
| 532 | 250 scroll_cursor_top(scrolljump_value(), FALSE); |
| 7 | 251 check_botline = TRUE; |
| 252 } | |
| 253 } | |
| 254 | |
| 255 else | |
| 256 { | |
| 257 #ifdef FEAT_FOLDING | |
| 258 /* Make sure topline is the first line of a fold. */ | |
| 259 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 260 #endif | |
| 261 check_botline = TRUE; | |
| 262 } | |
| 263 } | |
| 264 | |
| 265 /* | |
| 266 * If the cursor is below the bottom of the window, scroll the window | |
| 267 * to put the cursor on the window. | |
| 268 * When w_botline is invalid, recompute it first, to avoid a redraw later. | |
| 269 * If w_botline was approximated, we might need a redraw later in a few | |
| 270 * cases, but we don't want to spend (a lot of) time recomputing w_botline | |
| 271 * for every small change. | |
| 272 */ | |
| 273 if (check_botline) | |
| 274 { | |
| 275 if (!(curwin->w_valid & VALID_BOTLINE_AP)) | |
| 276 validate_botline(); | |
| 277 | |
| 278 if (curwin->w_botline <= curbuf->b_ml.ml_line_count) | |
| 279 { | |
| 1744 | 280 if (curwin->w_cursor.lnum < curwin->w_botline) |
| 281 { | |
| 282 if (((long)curwin->w_cursor.lnum | |
| 7 | 283 >= (long)curwin->w_botline - p_so |
| 284 #ifdef FEAT_FOLDING | |
| 285 || hasAnyFolding(curwin) | |
| 286 #endif | |
| 287 )) | |
| 1744 | 288 { |
| 7 | 289 lineoff_T loff; |
| 290 | |
| 1744 | 291 /* Cursor is (a few lines) above botline, check if there are |
| 292 * 'scrolloff' window lines below the cursor. If not, need to | |
| 293 * scroll. */ | |
| 7 | 294 n = curwin->w_empty_rows; |
| 295 loff.lnum = curwin->w_cursor.lnum; | |
| 296 #ifdef FEAT_FOLDING | |
| 297 /* In a fold go to its last line. */ | |
| 298 (void)hasFolding(loff.lnum, NULL, &loff.lnum); | |
| 299 #endif | |
| 300 #ifdef FEAT_DIFF | |
| 301 loff.fill = 0; | |
| 302 n += curwin->w_filler_rows; | |
| 303 #endif | |
| 304 loff.height = 0; | |
| 305 while (loff.lnum < curwin->w_botline | |
| 306 #ifdef FEAT_DIFF | |
| 307 && (loff.lnum + 1 < curwin->w_botline || loff.fill == 0) | |
| 308 #endif | |
| 309 ) | |
| 310 { | |
| 311 n += loff.height; | |
| 312 if (n >= p_so) | |
| 313 break; | |
| 314 botline_forw(&loff); | |
| 315 } | |
| 316 if (n >= p_so) | |
| 317 /* sufficient context, no need to scroll */ | |
| 318 check_botline = FALSE; | |
| 1744 | 319 } |
| 320 else | |
| 321 /* sufficient context, no need to scroll */ | |
| 322 check_botline = FALSE; | |
| 7 | 323 } |
| 324 if (check_botline) | |
| 325 { | |
| 326 #ifdef FEAT_FOLDING | |
| 327 if (hasAnyFolding(curwin)) | |
| 328 { | |
| 329 /* Count the number of logical lines between the cursor and | |
| 330 * botline - p_so (approximation of how much will be | |
| 331 * scrolled). */ | |
| 332 line_count = 0; | |
| 333 for (lnum = curwin->w_cursor.lnum; | |
| 334 lnum >= curwin->w_botline - p_so; --lnum) | |
| 335 { | |
| 336 ++line_count; | |
| 337 /* stop at end of file or when we know we are far off */ | |
| 338 if (lnum <= 0 || line_count > curwin->w_height + 1) | |
| 339 break; | |
| 340 (void)hasFolding(lnum, &lnum, NULL); | |
| 341 } | |
| 342 } | |
| 343 else | |
| 344 #endif | |
| 345 line_count = curwin->w_cursor.lnum - curwin->w_botline | |
| 346 + 1 + p_so; | |
| 347 if (line_count <= curwin->w_height + 1) | |
| 532 | 348 scroll_cursor_bot(scrolljump_value(), FALSE); |
| 7 | 349 else |
| 350 scroll_cursor_halfway(FALSE); | |
| 351 } | |
| 352 } | |
| 353 } | |
| 354 curwin->w_valid |= VALID_TOPLINE; | |
| 355 | |
| 356 /* | |
| 357 * Need to redraw when topline changed. | |
| 358 */ | |
| 359 if (curwin->w_topline != old_topline | |
| 360 #ifdef FEAT_DIFF | |
| 361 || curwin->w_topfill != old_topfill | |
| 362 #endif | |
| 363 ) | |
| 364 { | |
| 365 dollar_vcol = 0; | |
| 740 | 366 if (curwin->w_skipcol != 0) |
| 7 | 367 { |
| 368 curwin->w_skipcol = 0; | |
| 369 redraw_later(NOT_VALID); | |
| 370 } | |
| 371 else | |
| 372 redraw_later(VALID); | |
| 373 /* May need to set w_skipcol when cursor in w_topline. */ | |
| 374 if (curwin->w_cursor.lnum == curwin->w_topline) | |
| 375 validate_cursor(); | |
| 376 } | |
| 377 | |
| 378 #ifdef FEAT_MOUSE | |
| 379 p_so = save_so; | |
| 380 #endif | |
| 381 } | |
| 382 | |
| 383 /* | |
| 532 | 384 * Return the scrolljump value to use for the current window. |
| 385 * When 'scrolljump' is positive use it as-is. | |
| 386 * When 'scrolljump' is negative use it as a percentage of the window height. | |
| 387 */ | |
| 388 static int | |
| 389 scrolljump_value() | |
| 390 { | |
| 391 if (p_sj >= 0) | |
| 392 return (int)p_sj; | |
| 393 return (curwin->w_height * -p_sj) / 100; | |
| 394 } | |
| 395 | |
| 396 /* | |
| 7 | 397 * Return TRUE when there are not 'scrolloff' lines above the cursor for the |
| 398 * current window. | |
| 399 */ | |
| 400 static int | |
| 401 check_top_offset() | |
| 402 { | |
| 403 lineoff_T loff; | |
| 404 int n; | |
| 405 | |
| 406 if (curwin->w_cursor.lnum < curwin->w_topline + p_so | |
| 407 #ifdef FEAT_FOLDING | |
| 408 || hasAnyFolding(curwin) | |
| 409 #endif | |
| 410 ) | |
| 411 { | |
| 412 loff.lnum = curwin->w_cursor.lnum; | |
| 413 #ifdef FEAT_DIFF | |
| 414 loff.fill = 0; | |
| 415 n = curwin->w_topfill; /* always have this context */ | |
| 416 #else | |
| 417 n = 0; | |
| 418 #endif | |
| 419 /* Count the visible screen lines above the cursor line. */ | |
| 420 while (n < p_so) | |
| 421 { | |
| 422 topline_back(&loff); | |
| 423 /* Stop when included a line above the window. */ | |
| 424 if (loff.lnum < curwin->w_topline | |
| 425 #ifdef FEAT_DIFF | |
| 426 || (loff.lnum == curwin->w_topline && loff.fill > 0) | |
| 427 #endif | |
| 428 ) | |
| 429 break; | |
| 430 n += loff.height; | |
| 431 } | |
| 432 if (n < p_so) | |
| 433 return TRUE; | |
| 434 } | |
| 435 return FALSE; | |
| 436 } | |
| 437 | |
| 438 void | |
| 439 update_curswant() | |
| 440 { | |
| 441 if (curwin->w_set_curswant) | |
| 442 { | |
| 443 validate_virtcol(); | |
| 444 curwin->w_curswant = curwin->w_virtcol; | |
| 445 curwin->w_set_curswant = FALSE; | |
| 446 } | |
| 447 } | |
| 448 | |
| 449 /* | |
| 450 * Check if the cursor has moved. Set the w_valid flag accordingly. | |
| 451 */ | |
| 452 void | |
| 453 check_cursor_moved(wp) | |
| 454 win_T *wp; | |
| 455 { | |
| 456 if (wp->w_cursor.lnum != wp->w_valid_cursor.lnum) | |
| 457 { | |
| 458 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL | |
| 459 |VALID_CHEIGHT|VALID_CROW|VALID_TOPLINE); | |
| 460 wp->w_valid_cursor = wp->w_cursor; | |
| 461 wp->w_valid_leftcol = wp->w_leftcol; | |
| 462 } | |
| 463 else if (wp->w_cursor.col != wp->w_valid_cursor.col | |
| 464 || wp->w_leftcol != wp->w_valid_leftcol | |
| 465 #ifdef FEAT_VIRTUALEDIT | |
| 466 || wp->w_cursor.coladd != wp->w_valid_cursor.coladd | |
| 467 #endif | |
| 468 ) | |
| 469 { | |
| 470 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL); | |
| 471 wp->w_valid_cursor.col = wp->w_cursor.col; | |
| 472 wp->w_valid_leftcol = wp->w_leftcol; | |
| 473 #ifdef FEAT_VIRTUALEDIT | |
| 474 wp->w_valid_cursor.coladd = wp->w_cursor.coladd; | |
| 475 #endif | |
| 476 } | |
| 477 } | |
| 478 | |
| 479 /* | |
| 480 * Call this function when some window settings have changed, which require | |
| 481 * the cursor position, botline and topline to be recomputed and the window to | |
| 482 * be redrawn. E.g, when changing the 'wrap' option or folding. | |
| 483 */ | |
| 484 void | |
| 485 changed_window_setting() | |
| 486 { | |
| 487 changed_window_setting_win(curwin); | |
| 488 } | |
| 489 | |
| 490 void | |
| 491 changed_window_setting_win(wp) | |
| 492 win_T *wp; | |
| 493 { | |
| 494 wp->w_lines_valid = 0; | |
| 495 changed_line_abv_curs_win(wp); | |
| 496 wp->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP|VALID_TOPLINE); | |
| 497 redraw_win_later(wp, NOT_VALID); | |
| 498 } | |
| 499 | |
| 500 /* | |
| 501 * Set wp->w_topline to a certain number. | |
| 502 */ | |
| 503 void | |
| 504 set_topline(wp, lnum) | |
| 505 win_T *wp; | |
| 506 linenr_T lnum; | |
| 507 { | |
| 508 #ifdef FEAT_FOLDING | |
| 509 /* go to first of folded lines */ | |
| 510 (void)hasFoldingWin(wp, lnum, &lnum, NULL, TRUE, NULL); | |
| 511 #endif | |
| 512 /* Approximate the value of w_botline */ | |
| 513 wp->w_botline += lnum - wp->w_topline; | |
| 514 wp->w_topline = lnum; | |
| 1744 | 515 #ifdef FEAT_AUTOCMD |
| 516 wp->w_topline_was_set = TRUE; | |
| 517 #endif | |
| 7 | 518 #ifdef FEAT_DIFF |
| 519 wp->w_topfill = 0; | |
| 520 #endif | |
| 521 wp->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_TOPLINE); | |
| 522 /* Don't set VALID_TOPLINE here, 'scrolloff' needs to be checked. */ | |
| 523 redraw_later(VALID); | |
| 524 } | |
| 525 | |
| 526 /* | |
| 527 * Call this function when the length of the cursor line (in screen | |
| 528 * characters) has changed, and the change is before the cursor. | |
| 529 * Need to take care of w_botline separately! | |
| 530 */ | |
| 531 void | |
| 532 changed_cline_bef_curs() | |
| 533 { | |
| 534 curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL | |
| 535 |VALID_CHEIGHT|VALID_TOPLINE); | |
| 536 } | |
| 537 | |
| 538 void | |
| 539 changed_cline_bef_curs_win(wp) | |
| 540 win_T *wp; | |
| 541 { | |
| 542 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL | |
| 543 |VALID_CHEIGHT|VALID_TOPLINE); | |
| 544 } | |
| 545 | |
| 546 #if 0 /* not used */ | |
| 547 /* | |
| 548 * Call this function when the length of the cursor line (in screen | |
| 549 * characters) has changed, and the position of the cursor doesn't change. | |
| 550 * Need to take care of w_botline separately! | |
| 551 */ | |
| 552 void | |
| 553 changed_cline_aft_curs() | |
| 554 { | |
| 555 curwin->w_valid &= ~VALID_CHEIGHT; | |
| 556 } | |
| 557 #endif | |
| 558 | |
| 559 /* | |
| 560 * Call this function when the length of a line (in screen characters) above | |
| 561 * the cursor have changed. | |
| 562 * Need to take care of w_botline separately! | |
| 563 */ | |
| 564 void | |
| 565 changed_line_abv_curs() | |
| 566 { | |
| 567 curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW | |
| 568 |VALID_CHEIGHT|VALID_TOPLINE); | |
| 569 } | |
| 570 | |
| 571 void | |
| 572 changed_line_abv_curs_win(wp) | |
| 573 win_T *wp; | |
| 574 { | |
| 575 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW | |
| 576 |VALID_CHEIGHT|VALID_TOPLINE); | |
| 577 } | |
| 578 | |
| 579 /* | |
| 580 * Make sure the value of curwin->w_botline is valid. | |
| 581 */ | |
| 582 void | |
| 583 validate_botline() | |
| 584 { | |
| 585 if (!(curwin->w_valid & VALID_BOTLINE)) | |
| 586 comp_botline(curwin); | |
| 587 } | |
| 588 | |
| 589 /* | |
| 590 * Make sure the value of wp->w_botline is valid. | |
| 591 */ | |
| 592 static void | |
| 593 validate_botline_win(wp) | |
| 594 win_T *wp; | |
| 595 { | |
| 596 if (!(wp->w_valid & VALID_BOTLINE)) | |
| 597 comp_botline(wp); | |
| 598 } | |
| 599 | |
| 600 /* | |
| 601 * Mark curwin->w_botline as invalid (because of some change in the buffer). | |
| 602 */ | |
| 603 void | |
| 604 invalidate_botline() | |
| 605 { | |
| 606 curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 607 } | |
| 608 | |
| 609 void | |
| 610 invalidate_botline_win(wp) | |
| 611 win_T *wp; | |
| 612 { | |
| 613 wp->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 614 } | |
| 615 | |
| 616 #if 0 /* never used */ | |
| 617 /* | |
| 618 * Mark curwin->w_botline as approximated (because of some small change in the | |
| 619 * buffer). | |
| 620 */ | |
| 621 void | |
| 622 approximate_botline() | |
| 623 { | |
| 624 curwin->w_valid &= ~VALID_BOTLINE; | |
| 625 } | |
| 626 #endif | |
| 627 | |
| 628 void | |
| 629 approximate_botline_win(wp) | |
| 630 win_T *wp; | |
| 631 { | |
| 632 wp->w_valid &= ~VALID_BOTLINE; | |
| 633 } | |
| 634 | |
| 635 #if 0 /* not used */ | |
| 636 /* | |
| 637 * Return TRUE if curwin->w_botline is valid. | |
| 638 */ | |
| 639 int | |
| 640 botline_valid() | |
| 641 { | |
| 642 return (curwin->w_valid & VALID_BOTLINE); | |
| 643 } | |
| 644 #endif | |
| 645 | |
| 646 #if 0 /* not used */ | |
| 647 /* | |
| 648 * Return TRUE if curwin->w_botline is valid or approximated. | |
| 649 */ | |
| 650 int | |
| 651 botline_approximated() | |
| 652 { | |
| 653 return (curwin->w_valid & VALID_BOTLINE_AP); | |
| 654 } | |
| 655 #endif | |
| 656 | |
| 657 /* | |
| 658 * Return TRUE if curwin->w_wrow and curwin->w_wcol are valid. | |
| 659 */ | |
| 660 int | |
| 661 cursor_valid() | |
| 662 { | |
| 663 check_cursor_moved(curwin); | |
| 664 return ((curwin->w_valid & (VALID_WROW|VALID_WCOL)) == | |
| 665 (VALID_WROW|VALID_WCOL)); | |
| 666 } | |
| 667 | |
| 668 /* | |
| 669 * Validate cursor position. Makes sure w_wrow and w_wcol are valid. | |
| 670 * w_topline must be valid, you may need to call update_topline() first! | |
| 671 */ | |
| 672 void | |
| 673 validate_cursor() | |
| 674 { | |
| 675 check_cursor_moved(curwin); | |
| 676 if ((curwin->w_valid & (VALID_WCOL|VALID_WROW)) != (VALID_WCOL|VALID_WROW)) | |
| 677 curs_columns(TRUE); | |
| 678 } | |
| 679 | |
| 680 #if defined(FEAT_GUI) || defined(PROTO) | |
| 681 /* | |
| 682 * validate w_cline_row. | |
| 683 */ | |
| 684 void | |
| 685 validate_cline_row() | |
| 686 { | |
| 687 /* | |
| 688 * First make sure that w_topline is valid (after moving the cursor). | |
| 689 */ | |
| 690 update_topline(); | |
| 691 check_cursor_moved(curwin); | |
| 692 if (!(curwin->w_valid & VALID_CROW)) | |
| 693 curs_rows(curwin, FALSE); | |
| 694 } | |
| 695 #endif | |
| 696 | |
| 697 /* | |
| 698 * Compute wp->w_cline_row and wp->w_cline_height, based on the current value | |
|
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699 * of wp->w_topline. |
| 7 | 700 * |
| 701 * Returns OK when cursor is in the window, FAIL when it isn't. | |
| 702 */ | |
| 703 static void | |
| 704 curs_rows(wp, do_botline) | |
| 705 win_T *wp; | |
| 706 int do_botline; /* also compute w_botline */ | |
| 707 { | |
| 708 linenr_T lnum; | |
| 709 int i; | |
| 710 int all_invalid; | |
| 711 int valid; | |
| 712 #ifdef FEAT_FOLDING | |
| 713 long fold_count; | |
| 714 #endif | |
| 715 | |
| 716 /* Check if wp->w_lines[].wl_size is invalid */ | |
| 717 all_invalid = (!redrawing() | |
| 718 || wp->w_lines_valid == 0 | |
| 719 || wp->w_lines[0].wl_lnum > wp->w_topline); | |
| 720 i = 0; | |
| 721 wp->w_cline_row = 0; | |
| 722 for (lnum = wp->w_topline; lnum < wp->w_cursor.lnum; ++i) | |
| 723 { | |
| 724 valid = FALSE; | |
| 725 if (!all_invalid && i < wp->w_lines_valid) | |
| 726 { | |
| 727 if (wp->w_lines[i].wl_lnum < lnum || !wp->w_lines[i].wl_valid) | |
| 728 continue; /* skip changed or deleted lines */ | |
| 729 if (wp->w_lines[i].wl_lnum == lnum) | |
| 730 { | |
| 731 #ifdef FEAT_FOLDING | |
| 732 /* Check for newly inserted lines below this row, in which | |
| 733 * case we need to check for folded lines. */ | |
| 734 if (!wp->w_buffer->b_mod_set | |
| 735 || wp->w_lines[i].wl_lastlnum < wp->w_cursor.lnum | |
| 736 || wp->w_buffer->b_mod_top | |
| 737 > wp->w_lines[i].wl_lastlnum + 1) | |
| 738 #endif | |
| 739 valid = TRUE; | |
| 740 } | |
| 741 else if (wp->w_lines[i].wl_lnum > lnum) | |
| 742 --i; /* hold at inserted lines */ | |
| 743 } | |
| 744 if (valid | |
| 745 #ifdef FEAT_DIFF | |
| 746 && (lnum != wp->w_topline || !wp->w_p_diff) | |
| 747 #endif | |
| 748 ) | |
| 749 { | |
| 750 #ifdef FEAT_FOLDING | |
| 751 lnum = wp->w_lines[i].wl_lastlnum + 1; | |
| 752 /* Cursor inside folded lines, don't count this row */ | |
| 753 if (lnum > wp->w_cursor.lnum) | |
| 754 break; | |
| 755 #else | |
| 756 ++lnum; | |
| 757 #endif | |
| 758 wp->w_cline_row += wp->w_lines[i].wl_size; | |
| 759 } | |
| 760 else | |
| 761 { | |
| 762 #ifdef FEAT_FOLDING | |
| 763 fold_count = foldedCount(wp, lnum, NULL); | |
| 764 if (fold_count) | |
| 765 { | |
| 766 lnum += fold_count; | |
| 767 if (lnum > wp->w_cursor.lnum) | |
| 768 break; | |
| 769 ++wp->w_cline_row; | |
| 770 } | |
| 771 else | |
| 772 #endif | |
| 773 #ifdef FEAT_DIFF | |
| 774 if (lnum == wp->w_topline) | |
| 775 wp->w_cline_row += plines_win_nofill(wp, lnum++, TRUE) | |
| 776 + wp->w_topfill; | |
| 777 else | |
| 778 #endif | |
| 779 wp->w_cline_row += plines_win(wp, lnum++, TRUE); | |
| 780 } | |
| 781 } | |
| 782 | |
| 783 check_cursor_moved(wp); | |
| 784 if (!(wp->w_valid & VALID_CHEIGHT)) | |
| 785 { | |
| 786 if (all_invalid | |
| 787 || i == wp->w_lines_valid | |
| 788 || (i < wp->w_lines_valid | |
| 789 && (!wp->w_lines[i].wl_valid | |
| 790 || wp->w_lines[i].wl_lnum != wp->w_cursor.lnum))) | |
| 791 { | |
| 792 #ifdef FEAT_DIFF | |
| 793 if (wp->w_cursor.lnum == wp->w_topline) | |
| 794 wp->w_cline_height = plines_win_nofill(wp, wp->w_cursor.lnum, | |
| 795 TRUE) + wp->w_topfill; | |
| 796 else | |
| 797 #endif | |
| 798 wp->w_cline_height = plines_win(wp, wp->w_cursor.lnum, TRUE); | |
| 799 #ifdef FEAT_FOLDING | |
| 800 wp->w_cline_folded = hasFoldingWin(wp, wp->w_cursor.lnum, | |
| 801 NULL, NULL, TRUE, NULL); | |
| 802 #endif | |
| 803 } | |
| 804 else if (i > wp->w_lines_valid) | |
| 805 { | |
| 806 /* a line that is too long to fit on the last screen line */ | |
| 807 wp->w_cline_height = 0; | |
| 808 #ifdef FEAT_FOLDING | |
| 809 wp->w_cline_folded = hasFoldingWin(wp, wp->w_cursor.lnum, | |
| 810 NULL, NULL, TRUE, NULL); | |
| 811 #endif | |
| 812 } | |
| 813 else | |
| 814 { | |
| 815 wp->w_cline_height = wp->w_lines[i].wl_size; | |
| 816 #ifdef FEAT_FOLDING | |
| 817 wp->w_cline_folded = wp->w_lines[i].wl_folded; | |
| 818 #endif | |
| 819 } | |
| 820 } | |
| 821 | |
| 822 wp->w_valid |= VALID_CROW|VALID_CHEIGHT; | |
| 823 | |
| 824 /* validate botline too, if update_screen doesn't do it */ | |
| 825 if (do_botline && all_invalid) | |
| 826 validate_botline_win(wp); | |
| 827 } | |
| 828 | |
| 829 /* | |
| 830 * Validate curwin->w_virtcol only. | |
| 831 */ | |
| 832 void | |
| 833 validate_virtcol() | |
| 834 { | |
| 835 validate_virtcol_win(curwin); | |
| 836 } | |
| 837 | |
| 838 /* | |
| 839 * Validate wp->w_virtcol only. | |
| 840 */ | |
| 841 void | |
| 842 validate_virtcol_win(wp) | |
| 843 win_T *wp; | |
| 844 { | |
| 845 check_cursor_moved(wp); | |
| 846 if (!(wp->w_valid & VALID_VIRTCOL)) | |
| 847 { | |
| 848 getvvcol(wp, &wp->w_cursor, NULL, &(wp->w_virtcol), NULL); | |
| 849 wp->w_valid |= VALID_VIRTCOL; | |
| 740 | 850 #ifdef FEAT_SYN_HL |
| 752 | 851 if (wp->w_p_cuc |
| 852 # ifdef FEAT_INS_EXPAND | |
| 853 && !pum_visible() | |
| 854 # endif | |
| 855 ) | |
| 740 | 856 redraw_win_later(wp, SOME_VALID); |
| 857 #endif | |
| 7 | 858 } |
| 859 } | |
| 860 | |
| 861 /* | |
| 862 * Validate curwin->w_cline_height only. | |
| 863 */ | |
| 864 static void | |
| 865 validate_cheight() | |
| 866 { | |
| 867 check_cursor_moved(curwin); | |
| 868 if (!(curwin->w_valid & VALID_CHEIGHT)) | |
| 869 { | |
| 870 #ifdef FEAT_DIFF | |
| 871 if (curwin->w_cursor.lnum == curwin->w_topline) | |
| 872 curwin->w_cline_height = plines_nofill(curwin->w_cursor.lnum) | |
| 873 + curwin->w_topfill; | |
| 874 else | |
| 875 #endif | |
| 876 curwin->w_cline_height = plines(curwin->w_cursor.lnum); | |
| 877 #ifdef FEAT_FOLDING | |
| 878 curwin->w_cline_folded = hasFolding(curwin->w_cursor.lnum, NULL, NULL); | |
| 879 #endif | |
| 880 curwin->w_valid |= VALID_CHEIGHT; | |
| 881 } | |
| 882 } | |
| 883 | |
| 884 /* | |
| 1668 | 885 * Validate w_wcol and w_virtcol only. |
| 7 | 886 */ |
| 887 void | |
| 888 validate_cursor_col() | |
| 889 { | |
| 890 colnr_T off; | |
| 891 colnr_T col; | |
|
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|
892 int width; |
| 7 | 893 |
| 894 validate_virtcol(); | |
| 895 if (!(curwin->w_valid & VALID_WCOL)) | |
| 896 { | |
| 897 col = curwin->w_virtcol; | |
| 898 off = curwin_col_off(); | |
| 899 col += off; | |
|
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|
900 width = W_WIDTH(curwin) - off + curwin_col_off2(); |
| 7 | 901 |
| 902 /* long line wrapping, adjust curwin->w_wrow */ | |
| 1668 | 903 if (curwin->w_p_wrap |
| 904 && col >= (colnr_T)W_WIDTH(curwin) | |
|
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|
905 && width > 0) |
|
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1980
diff
changeset
|
906 /* use same formula as what is used in curs_columns() */ |
|
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diff
changeset
|
907 col -= ((col - W_WIDTH(curwin)) / width + 1) * width; |
| 1668 | 908 if (col > (int)curwin->w_leftcol) |
| 909 col -= curwin->w_leftcol; | |
| 910 else | |
| 911 col = 0; | |
| 7 | 912 curwin->w_wcol = col; |
| 1668 | 913 |
| 7 | 914 curwin->w_valid |= VALID_WCOL; |
| 915 } | |
| 916 } | |
| 917 | |
| 918 /* | |
| 919 * Compute offset of a window, occupied by line number, fold column and sign | |
| 920 * column (these don't move when scrolling horizontally). | |
| 921 */ | |
| 922 int | |
| 923 win_col_off(wp) | |
| 924 win_T *wp; | |
| 925 { | |
| 13 | 926 return ((wp->w_p_nu ? number_width(wp) + 1 : 0) |
| 7 | 927 #ifdef FEAT_CMDWIN |
| 928 + (cmdwin_type == 0 || wp != curwin ? 0 : 1) | |
| 929 #endif | |
| 930 #ifdef FEAT_FOLDING | |
| 931 + wp->w_p_fdc | |
| 932 #endif | |
| 933 #ifdef FEAT_SIGNS | |
| 934 + ( | |
| 935 # ifdef FEAT_NETBEANS_INTG | |
| 936 /* always show glyph gutter in netbeans */ | |
| 937 usingNetbeans || | |
| 938 # endif | |
| 939 wp->w_buffer->b_signlist != NULL ? 2 : 0) | |
| 940 #endif | |
| 941 ); | |
| 942 } | |
| 943 | |
| 944 int | |
| 945 curwin_col_off() | |
| 946 { | |
| 947 return win_col_off(curwin); | |
| 948 } | |
| 949 | |
| 950 /* | |
| 951 * Return the difference in column offset for the second screen line of a | |
| 952 * wrapped line. It's 8 if 'number' is on and 'n' is in 'cpoptions'. | |
| 953 */ | |
| 954 int | |
| 955 win_col_off2(wp) | |
| 956 win_T *wp; | |
| 957 { | |
| 958 if (wp->w_p_nu && vim_strchr(p_cpo, CPO_NUMCOL) != NULL) | |
| 13 | 959 return number_width(wp) + 1; |
| 7 | 960 return 0; |
| 961 } | |
| 962 | |
| 963 int | |
| 964 curwin_col_off2() | |
| 965 { | |
| 966 return win_col_off2(curwin); | |
| 967 } | |
| 968 | |
| 969 /* | |
| 970 * compute curwin->w_wcol and curwin->w_virtcol. | |
| 971 * Also updates curwin->w_wrow and curwin->w_cline_row. | |
| 972 * Also updates curwin->w_leftcol. | |
| 973 */ | |
| 974 void | |
| 975 curs_columns(scroll) | |
| 976 int scroll; /* when TRUE, may scroll horizontally */ | |
| 977 { | |
| 978 int diff; | |
| 979 int extra; /* offset for first screen line */ | |
| 980 int off_left, off_right; | |
| 981 int n; | |
| 982 int p_lines; | |
| 983 int width = 0; | |
| 984 int textwidth; | |
| 985 int new_leftcol; | |
| 986 colnr_T startcol; | |
| 987 colnr_T endcol; | |
| 988 colnr_T prev_skipcol; | |
| 989 | |
| 990 /* | |
| 991 * First make sure that w_topline is valid (after moving the cursor). | |
| 992 */ | |
| 993 update_topline(); | |
| 994 | |
| 995 /* | |
| 996 * Next make sure that w_cline_row is valid. | |
| 997 */ | |
| 998 if (!(curwin->w_valid & VALID_CROW)) | |
| 999 curs_rows(curwin, FALSE); | |
| 1000 | |
| 1001 /* | |
| 1002 * Compute the number of virtual columns. | |
| 1003 */ | |
| 1004 #ifdef FEAT_FOLDING | |
| 1005 if (curwin->w_cline_folded) | |
| 1006 /* In a folded line the cursor is always in the first column */ | |
| 1007 startcol = curwin->w_virtcol = endcol = curwin->w_leftcol; | |
| 1008 else | |
| 1009 #endif | |
| 1010 getvvcol(curwin, &curwin->w_cursor, | |
| 1011 &startcol, &(curwin->w_virtcol), &endcol); | |
| 1012 | |
| 1013 /* remove '$' from change command when cursor moves onto it */ | |
| 1014 if (startcol > dollar_vcol) | |
| 1015 dollar_vcol = 0; | |
| 1016 | |
| 1017 extra = curwin_col_off(); | |
| 1018 curwin->w_wcol = curwin->w_virtcol + extra; | |
| 1019 endcol += extra; | |
| 1020 | |
| 1021 /* | |
| 1022 * Now compute w_wrow, counting screen lines from w_cline_row. | |
| 1023 */ | |
| 1024 curwin->w_wrow = curwin->w_cline_row; | |
| 1025 | |
| 1026 textwidth = W_WIDTH(curwin) - extra; | |
| 1027 if (textwidth <= 0) | |
| 1028 { | |
| 1029 /* No room for text, put cursor in last char of window. */ | |
| 1030 curwin->w_wcol = W_WIDTH(curwin) - 1; | |
| 1031 curwin->w_wrow = curwin->w_height - 1; | |
| 1032 } | |
| 1033 else if (curwin->w_p_wrap | |
| 1034 #ifdef FEAT_VERTSPLIT | |
| 1035 && curwin->w_width != 0 | |
| 1036 #endif | |
| 1037 ) | |
| 1038 { | |
| 1039 width = textwidth + curwin_col_off2(); | |
| 1040 | |
| 1041 /* long line wrapping, adjust curwin->w_wrow */ | |
| 1042 if (curwin->w_wcol >= W_WIDTH(curwin)) | |
| 1043 { | |
|
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changeset
|
1044 /* this same formula is used in validate_cursor_col() */ |
| 7 | 1045 n = (curwin->w_wcol - W_WIDTH(curwin)) / width + 1; |
| 1046 curwin->w_wcol -= n * width; | |
| 1047 curwin->w_wrow += n; | |
| 1048 | |
| 1049 #ifdef FEAT_LINEBREAK | |
| 1050 /* When cursor wraps to first char of next line in Insert | |
| 1051 * mode, the 'showbreak' string isn't shown, backup to first | |
| 1052 * column */ | |
| 1053 if (*p_sbr && *ml_get_cursor() == NUL | |
| 1054 && curwin->w_wcol == (int)vim_strsize(p_sbr)) | |
| 1055 curwin->w_wcol = 0; | |
| 1056 #endif | |
| 1057 } | |
| 1058 } | |
| 1059 | |
| 1060 /* No line wrapping: compute curwin->w_leftcol if scrolling is on and line | |
| 1061 * is not folded. | |
| 1062 * If scrolling is off, curwin->w_leftcol is assumed to be 0 */ | |
| 1063 else if (scroll | |
| 1064 #ifdef FEAT_FOLDING | |
| 1065 && !curwin->w_cline_folded | |
| 1066 #endif | |
| 1067 ) | |
| 1068 { | |
| 1069 /* | |
| 1070 * If Cursor is left of the screen, scroll rightwards. | |
| 1071 * If Cursor is right of the screen, scroll leftwards | |
| 1072 * If we get closer to the edge than 'sidescrolloff', scroll a little | |
| 1073 * extra | |
| 1074 */ | |
| 1075 off_left = (int)startcol - (int)curwin->w_leftcol - p_siso; | |
| 1076 off_right = (int)endcol - (int)(curwin->w_leftcol + W_WIDTH(curwin) | |
| 1077 - p_siso) + 1; | |
| 1078 if (off_left < 0 || off_right > 0) | |
| 1079 { | |
| 1080 if (off_left < 0) | |
| 1081 diff = -off_left; | |
| 1082 else | |
| 1083 diff = off_right; | |
| 1084 | |
| 1085 /* When far off or not enough room on either side, put cursor in | |
| 1086 * middle of window. */ | |
| 1087 if (p_ss == 0 || diff >= textwidth / 2 || off_right >= off_left) | |
| 1088 new_leftcol = curwin->w_wcol - extra - textwidth / 2; | |
| 1089 else | |
| 1090 { | |
| 1091 if (diff < p_ss) | |
| 1092 diff = p_ss; | |
| 1093 if (off_left < 0) | |
| 1094 new_leftcol = curwin->w_leftcol - diff; | |
| 1095 else | |
| 1096 new_leftcol = curwin->w_leftcol + diff; | |
| 1097 } | |
| 1098 if (new_leftcol < 0) | |
| 1099 new_leftcol = 0; | |
| 1100 if (new_leftcol != (int)curwin->w_leftcol) | |
| 1101 { | |
| 1102 curwin->w_leftcol = new_leftcol; | |
| 1103 /* screen has to be redrawn with new curwin->w_leftcol */ | |
| 1104 redraw_later(NOT_VALID); | |
| 1105 } | |
| 1106 } | |
| 1107 curwin->w_wcol -= curwin->w_leftcol; | |
| 1108 } | |
| 1109 else if (curwin->w_wcol > (int)curwin->w_leftcol) | |
| 1110 curwin->w_wcol -= curwin->w_leftcol; | |
| 1111 else | |
| 1112 curwin->w_wcol = 0; | |
| 1113 | |
| 1114 #ifdef FEAT_DIFF | |
| 1115 /* Skip over filler lines. At the top use w_topfill, there | |
| 1116 * may be some filler lines above the window. */ | |
| 1117 if (curwin->w_cursor.lnum == curwin->w_topline) | |
| 1118 curwin->w_wrow += curwin->w_topfill; | |
| 1119 else | |
| 1120 curwin->w_wrow += diff_check_fill(curwin, curwin->w_cursor.lnum); | |
| 1121 #endif | |
| 1122 | |
| 1123 prev_skipcol = curwin->w_skipcol; | |
| 1124 | |
| 1125 p_lines = 0; | |
| 1126 if ((curwin->w_wrow >= curwin->w_height | |
| 1127 || ((prev_skipcol > 0 | |
| 1128 || curwin->w_wrow + p_so >= curwin->w_height) | |
| 1129 && (p_lines = | |
| 1130 #ifdef FEAT_DIFF | |
| 1131 plines_win_nofill | |
| 1132 #else | |
| 1133 plines_win | |
| 1134 #endif | |
| 1135 (curwin, curwin->w_cursor.lnum, FALSE)) | |
| 1136 - 1 >= curwin->w_height)) | |
| 1137 && curwin->w_height != 0 | |
| 1138 && curwin->w_cursor.lnum == curwin->w_topline | |
| 1139 && width > 0 | |
| 1140 #ifdef FEAT_VERTSPLIT | |
| 1141 && curwin->w_width != 0 | |
| 1142 #endif | |
| 1143 ) | |
| 1144 { | |
| 1145 /* Cursor past end of screen. Happens with a single line that does | |
| 1146 * not fit on screen. Find a skipcol to show the text around the | |
| 1147 * cursor. Avoid scrolling all the time. compute value of "extra": | |
| 1148 * 1: Less than "p_so" lines above | |
| 1149 * 2: Less than "p_so" lines below | |
| 1150 * 3: both of them */ | |
| 1151 extra = 0; | |
| 1152 if (curwin->w_skipcol + p_so * width > curwin->w_virtcol) | |
| 1153 extra = 1; | |
| 1154 /* Compute last display line of the buffer line that we want at the | |
| 1155 * bottom of the window. */ | |
| 1156 if (p_lines == 0) | |
| 1157 p_lines = plines_win(curwin, curwin->w_cursor.lnum, FALSE); | |
| 1158 --p_lines; | |
| 1159 if (p_lines > curwin->w_wrow + p_so) | |
| 1160 n = curwin->w_wrow + p_so; | |
| 1161 else | |
| 1162 n = p_lines; | |
| 1163 if ((colnr_T)n >= curwin->w_height + curwin->w_skipcol / width) | |
| 1164 extra += 2; | |
| 1165 | |
| 1166 if (extra == 3 || p_lines < p_so * 2) | |
| 1167 { | |
| 1168 /* not enough room for 'scrolloff', put cursor in the middle */ | |
| 1169 n = curwin->w_virtcol / width; | |
| 1170 if (n > curwin->w_height / 2) | |
| 1171 n -= curwin->w_height / 2; | |
| 1172 else | |
| 1173 n = 0; | |
| 1174 /* don't skip more than necessary */ | |
| 1175 if (n > p_lines - curwin->w_height + 1) | |
| 1176 n = p_lines - curwin->w_height + 1; | |
| 1177 curwin->w_skipcol = n * width; | |
| 1178 } | |
| 1179 else if (extra == 1) | |
| 1180 { | |
| 1181 /* less then 'scrolloff' lines above, decrease skipcol */ | |
| 1182 extra = (curwin->w_skipcol + p_so * width - curwin->w_virtcol | |
| 1183 + width - 1) / width; | |
| 1184 if (extra > 0) | |
| 1185 { | |
| 1186 if ((colnr_T)(extra * width) > curwin->w_skipcol) | |
| 1187 extra = curwin->w_skipcol / width; | |
| 1188 curwin->w_skipcol -= extra * width; | |
| 1189 } | |
| 1190 } | |
| 1191 else if (extra == 2) | |
| 1192 { | |
| 1193 /* less then 'scrolloff' lines below, increase skipcol */ | |
| 1194 endcol = (n - curwin->w_height + 1) * width; | |
| 1195 while (endcol > curwin->w_virtcol) | |
| 1196 endcol -= width; | |
| 1197 if (endcol > curwin->w_skipcol) | |
| 1198 curwin->w_skipcol = endcol; | |
| 1199 } | |
| 1200 | |
| 1201 curwin->w_wrow -= curwin->w_skipcol / width; | |
| 1202 if (curwin->w_wrow >= curwin->w_height) | |
| 1203 { | |
| 1204 /* small window, make sure cursor is in it */ | |
| 1205 extra = curwin->w_wrow - curwin->w_height + 1; | |
| 1206 curwin->w_skipcol += extra * width; | |
| 1207 curwin->w_wrow -= extra; | |
| 1208 } | |
| 1209 | |
| 1210 extra = ((int)prev_skipcol - (int)curwin->w_skipcol) / width; | |
| 1211 if (extra > 0) | |
| 1212 win_ins_lines(curwin, 0, extra, FALSE, FALSE); | |
| 1213 else if (extra < 0) | |
| 1214 win_del_lines(curwin, 0, -extra, FALSE, FALSE); | |
| 1215 } | |
| 1216 else | |
| 1217 curwin->w_skipcol = 0; | |
| 1218 if (prev_skipcol != curwin->w_skipcol) | |
| 1219 redraw_later(NOT_VALID); | |
| 1220 | |
| 740 | 1221 #ifdef FEAT_SYN_HL |
| 1222 /* Redraw when w_virtcol changes and 'cursorcolumn' is set, or when w_row | |
| 1223 * changes and 'cursorline' is set. */ | |
| 752 | 1224 if (((curwin->w_p_cuc && (curwin->w_valid & VALID_VIRTCOL) == 0) |
| 1225 || (curwin->w_p_cul && (curwin->w_valid & VALID_WROW) == 0)) | |
| 1226 # ifdef FEAT_INS_EXPAND | |
| 1227 && !pum_visible() | |
| 1228 # endif | |
| 1229 ) | |
| 740 | 1230 redraw_later(SOME_VALID); |
| 1231 #endif | |
| 1232 | |
| 7 | 1233 curwin->w_valid |= VALID_WCOL|VALID_WROW|VALID_VIRTCOL; |
| 1234 } | |
| 1235 | |
| 1236 /* | |
| 1237 * Scroll the current window down by "line_count" logical lines. "CTRL-Y" | |
| 1238 */ | |
| 1239 void | |
| 1240 scrolldown(line_count, byfold) | |
| 1241 long line_count; | |
| 1877 | 1242 int byfold UNUSED; /* TRUE: count a closed fold as one line */ |
| 7 | 1243 { |
| 1244 long done = 0; /* total # of physical lines done */ | |
| 1245 int wrow; | |
| 1246 int moved = FALSE; | |
| 1247 | |
| 1248 #ifdef FEAT_FOLDING | |
| 1249 linenr_T first; | |
| 1250 | |
| 1251 /* Make sure w_topline is at the first of a sequence of folded lines. */ | |
| 1252 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 1253 #endif | |
| 1254 validate_cursor(); /* w_wrow needs to be valid */ | |
| 1255 while (line_count-- > 0) | |
| 1256 { | |
| 1257 #ifdef FEAT_DIFF | |
| 1980 | 1258 if (curwin->w_topfill < diff_check(curwin, curwin->w_topline) |
| 1259 && curwin->w_topfill < curwin->w_height - 1) | |
| 7 | 1260 { |
| 1261 ++curwin->w_topfill; | |
| 1262 ++done; | |
| 1263 } | |
| 1264 else | |
| 1265 #endif | |
| 1266 { | |
| 1267 if (curwin->w_topline == 1) | |
| 1268 break; | |
| 1269 --curwin->w_topline; | |
| 1270 #ifdef FEAT_DIFF | |
| 1271 curwin->w_topfill = 0; | |
| 1272 #endif | |
| 1273 #ifdef FEAT_FOLDING | |
| 1274 /* A sequence of folded lines only counts for one logical line */ | |
| 1275 if (hasFolding(curwin->w_topline, &first, NULL)) | |
| 1276 { | |
| 1277 ++done; | |
| 1278 if (!byfold) | |
| 1279 line_count -= curwin->w_topline - first - 1; | |
| 1280 curwin->w_botline -= curwin->w_topline - first; | |
| 1281 curwin->w_topline = first; | |
| 1282 } | |
| 1283 else | |
| 1284 #endif | |
| 1285 #ifdef FEAT_DIFF | |
| 1286 done += plines_nofill(curwin->w_topline); | |
| 1287 #else | |
| 1288 done += plines(curwin->w_topline); | |
| 1289 #endif | |
| 1290 } | |
| 1291 --curwin->w_botline; /* approximate w_botline */ | |
| 1292 invalidate_botline(); | |
| 1293 } | |
| 1294 curwin->w_wrow += done; /* keep w_wrow updated */ | |
| 1295 curwin->w_cline_row += done; /* keep w_cline_row updated */ | |
| 1296 | |
| 1297 #ifdef FEAT_DIFF | |
| 1298 if (curwin->w_cursor.lnum == curwin->w_topline) | |
| 1299 curwin->w_cline_row = 0; | |
| 1300 check_topfill(curwin, TRUE); | |
| 1301 #endif | |
| 1302 | |
| 1303 /* | |
| 1304 * Compute the row number of the last row of the cursor line | |
| 1305 * and move the cursor onto the displayed part of the window. | |
| 1306 */ | |
| 1307 wrow = curwin->w_wrow; | |
| 1308 if (curwin->w_p_wrap | |
| 1309 #ifdef FEAT_VERTSPLIT | |
| 1310 && curwin->w_width != 0 | |
| 1311 #endif | |
| 1312 ) | |
| 1313 { | |
| 1314 validate_virtcol(); | |
| 1315 validate_cheight(); | |
| 1316 wrow += curwin->w_cline_height - 1 - | |
| 1317 curwin->w_virtcol / W_WIDTH(curwin); | |
| 1318 } | |
| 1319 while (wrow >= curwin->w_height && curwin->w_cursor.lnum > 1) | |
| 1320 { | |
| 1321 #ifdef FEAT_FOLDING | |
| 1322 if (hasFolding(curwin->w_cursor.lnum, &first, NULL)) | |
| 1323 { | |
| 1324 --wrow; | |
| 1325 if (first == 1) | |
| 1326 curwin->w_cursor.lnum = 1; | |
| 1327 else | |
| 1328 curwin->w_cursor.lnum = first - 1; | |
| 1329 } | |
| 1330 else | |
| 1331 #endif | |
| 1332 wrow -= plines(curwin->w_cursor.lnum--); | |
| 1333 curwin->w_valid &= | |
| 1334 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL); | |
| 1335 moved = TRUE; | |
| 1336 } | |
| 1337 if (moved) | |
| 1338 { | |
| 1339 #ifdef FEAT_FOLDING | |
| 1340 /* Move cursor to first line of closed fold. */ | |
| 1341 foldAdjustCursor(); | |
| 1342 #endif | |
| 1343 coladvance(curwin->w_curswant); | |
| 1344 } | |
| 1345 } | |
| 1346 | |
| 1347 /* | |
| 1348 * Scroll the current window up by "line_count" logical lines. "CTRL-E" | |
| 1349 */ | |
| 1350 void | |
| 1351 scrollup(line_count, byfold) | |
| 1352 long line_count; | |
| 1877 | 1353 int byfold UNUSED; /* TRUE: count a closed fold as one line */ |
| 7 | 1354 { |
| 1355 #if defined(FEAT_FOLDING) || defined(FEAT_DIFF) | |
| 1356 linenr_T lnum; | |
| 1357 | |
| 1358 if ( | |
| 1359 # ifdef FEAT_FOLDING | |
| 1360 (byfold && hasAnyFolding(curwin)) | |
| 1361 # ifdef FEAT_DIFF | |
| 1362 || | |
| 1363 # endif | |
| 1364 # endif | |
| 1365 # ifdef FEAT_DIFF | |
| 1366 curwin->w_p_diff | |
| 1367 # endif | |
| 1368 ) | |
| 1369 { | |
| 1370 /* count each sequence of folded lines as one logical line */ | |
| 1371 lnum = curwin->w_topline; | |
| 1372 while (line_count--) | |
| 1373 { | |
| 1374 # ifdef FEAT_DIFF | |
| 1375 if (curwin->w_topfill > 0) | |
| 1376 --curwin->w_topfill; | |
| 1377 else | |
| 1378 # endif | |
| 1379 { | |
| 1380 # ifdef FEAT_FOLDING | |
| 1381 if (byfold) | |
| 1382 (void)hasFolding(lnum, NULL, &lnum); | |
| 1383 # endif | |
| 1384 if (lnum >= curbuf->b_ml.ml_line_count) | |
| 1385 break; | |
| 1386 ++lnum; | |
| 1387 # ifdef FEAT_DIFF | |
| 1388 curwin->w_topfill = diff_check_fill(curwin, lnum); | |
| 1389 # endif | |
| 1390 } | |
| 1391 } | |
| 1392 /* approximate w_botline */ | |
| 1393 curwin->w_botline += lnum - curwin->w_topline; | |
| 1394 curwin->w_topline = lnum; | |
| 1395 } | |
| 1396 else | |
| 1397 #endif | |
| 1398 { | |
| 1399 curwin->w_topline += line_count; | |
| 1400 curwin->w_botline += line_count; /* approximate w_botline */ | |
| 1401 } | |
| 1402 | |
| 1403 if (curwin->w_topline > curbuf->b_ml.ml_line_count) | |
| 1404 curwin->w_topline = curbuf->b_ml.ml_line_count; | |
| 1405 if (curwin->w_botline > curbuf->b_ml.ml_line_count + 1) | |
| 1406 curwin->w_botline = curbuf->b_ml.ml_line_count + 1; | |
| 1407 | |
| 1408 #ifdef FEAT_DIFF | |
| 1409 check_topfill(curwin, FALSE); | |
| 1410 #endif | |
| 1411 | |
| 1412 #ifdef FEAT_FOLDING | |
| 1413 if (hasAnyFolding(curwin)) | |
| 1414 /* Make sure w_topline is at the first of a sequence of folded lines. */ | |
| 1415 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 1416 #endif | |
| 1417 | |
| 1418 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 1419 if (curwin->w_cursor.lnum < curwin->w_topline) | |
| 1420 { | |
| 1421 curwin->w_cursor.lnum = curwin->w_topline; | |
| 1422 curwin->w_valid &= | |
| 1423 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL); | |
| 1424 coladvance(curwin->w_curswant); | |
| 1425 } | |
| 1426 } | |
| 1427 | |
| 1428 #ifdef FEAT_DIFF | |
| 1429 /* | |
| 1430 * Don't end up with too many filler lines in the window. | |
| 1431 */ | |
| 1432 void | |
| 1433 check_topfill(wp, down) | |
| 1434 win_T *wp; | |
| 1435 int down; /* when TRUE scroll down when not enough space */ | |
| 1436 { | |
| 1437 int n; | |
| 1438 | |
| 1439 if (wp->w_topfill > 0) | |
| 1440 { | |
| 1441 n = plines_win_nofill(wp, wp->w_topline, TRUE); | |
| 1442 if (wp->w_topfill + n > wp->w_height) | |
| 1443 { | |
| 1444 if (down && wp->w_topline > 1) | |
| 1445 { | |
| 1446 --wp->w_topline; | |
| 1447 wp->w_topfill = 0; | |
| 1448 } | |
| 1449 else | |
| 1450 { | |
| 1451 wp->w_topfill = wp->w_height - n; | |
| 1452 if (wp->w_topfill < 0) | |
| 1453 wp->w_topfill = 0; | |
| 1454 } | |
| 1455 } | |
| 1456 } | |
| 1457 } | |
| 1458 | |
| 1459 /* | |
| 1460 * Use as many filler lines as possible for w_topline. Make sure w_topline | |
| 1461 * is still visible. | |
| 1462 */ | |
| 1463 static void | |
| 1464 max_topfill() | |
| 1465 { | |
| 1466 int n; | |
| 1467 | |
| 1468 n = plines_nofill(curwin->w_topline); | |
| 1469 if (n >= curwin->w_height) | |
| 1470 curwin->w_topfill = 0; | |
| 1471 else | |
| 1472 { | |
| 1473 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline); | |
| 1474 if (curwin->w_topfill + n > curwin->w_height) | |
| 1475 curwin->w_topfill = curwin->w_height - n; | |
| 1476 } | |
| 1477 } | |
| 1478 #endif | |
| 1479 | |
| 1480 #if defined(FEAT_INS_EXPAND) || defined(PROTO) | |
| 1481 /* | |
| 1482 * Scroll the screen one line down, but don't do it if it would move the | |
| 1483 * cursor off the screen. | |
| 1484 */ | |
| 1485 void | |
| 1486 scrolldown_clamp() | |
| 1487 { | |
| 1488 int end_row; | |
| 1489 #ifdef FEAT_DIFF | |
| 1490 int can_fill = (curwin->w_topfill | |
| 1491 < diff_check_fill(curwin, curwin->w_topline)); | |
| 1492 #endif | |
| 1493 | |
| 1494 if (curwin->w_topline <= 1 | |
| 1495 #ifdef FEAT_DIFF | |
| 1496 && !can_fill | |
| 1497 #endif | |
| 1498 ) | |
| 1499 return; | |
| 1500 | |
| 1501 validate_cursor(); /* w_wrow needs to be valid */ | |
| 1502 | |
| 1503 /* | |
| 1504 * Compute the row number of the last row of the cursor line | |
| 1505 * and make sure it doesn't go off the screen. Make sure the cursor | |
| 1506 * doesn't go past 'scrolloff' lines from the screen end. | |
| 1507 */ | |
| 1508 end_row = curwin->w_wrow; | |
| 1509 #ifdef FEAT_DIFF | |
| 1510 if (can_fill) | |
| 1511 ++end_row; | |
| 1512 else | |
| 1513 end_row += plines_nofill(curwin->w_topline - 1); | |
| 1514 #else | |
| 1515 end_row += plines(curwin->w_topline - 1); | |
| 1516 #endif | |
| 1517 if (curwin->w_p_wrap | |
| 1518 #ifdef FEAT_VERTSPLIT | |
| 1519 && curwin->w_width != 0 | |
| 1520 #endif | |
| 1521 ) | |
| 1522 { | |
| 1523 validate_cheight(); | |
| 1524 validate_virtcol(); | |
| 1525 end_row += curwin->w_cline_height - 1 - | |
| 1526 curwin->w_virtcol / W_WIDTH(curwin); | |
| 1527 } | |
| 1528 if (end_row < curwin->w_height - p_so) | |
| 1529 { | |
| 1530 #ifdef FEAT_DIFF | |
| 1531 if (can_fill) | |
| 1532 { | |
| 1533 ++curwin->w_topfill; | |
| 1534 check_topfill(curwin, TRUE); | |
| 1535 } | |
| 1536 else | |
| 1537 { | |
| 1538 --curwin->w_topline; | |
| 1539 curwin->w_topfill = 0; | |
| 1540 } | |
| 1541 #else | |
| 1542 --curwin->w_topline; | |
| 1543 #endif | |
| 1544 #ifdef FEAT_FOLDING | |
| 1545 hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 1546 #endif | |
| 1547 --curwin->w_botline; /* approximate w_botline */ | |
| 1548 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 1549 } | |
| 1550 } | |
| 1551 | |
| 1552 /* | |
| 1553 * Scroll the screen one line up, but don't do it if it would move the cursor | |
| 1554 * off the screen. | |
| 1555 */ | |
| 1556 void | |
| 1557 scrollup_clamp() | |
| 1558 { | |
| 1559 int start_row; | |
| 1560 | |
| 1561 if (curwin->w_topline == curbuf->b_ml.ml_line_count | |
| 1562 #ifdef FEAT_DIFF | |
| 1563 && curwin->w_topfill == 0 | |
| 1564 #endif | |
| 1565 ) | |
| 1566 return; | |
| 1567 | |
| 1568 validate_cursor(); /* w_wrow needs to be valid */ | |
| 1569 | |
| 1570 /* | |
| 1571 * Compute the row number of the first row of the cursor line | |
| 1572 * and make sure it doesn't go off the screen. Make sure the cursor | |
| 1573 * doesn't go before 'scrolloff' lines from the screen start. | |
| 1574 */ | |
| 1575 #ifdef FEAT_DIFF | |
| 1576 start_row = curwin->w_wrow - plines_nofill(curwin->w_topline) | |
| 1577 - curwin->w_topfill; | |
| 1578 #else | |
| 1579 start_row = curwin->w_wrow - plines(curwin->w_topline); | |
| 1580 #endif | |
| 1581 if (curwin->w_p_wrap | |
| 1582 #ifdef FEAT_VERTSPLIT | |
| 1583 && curwin->w_width != 0 | |
| 1584 #endif | |
| 1585 ) | |
| 1586 { | |
| 1587 validate_virtcol(); | |
| 1588 start_row -= curwin->w_virtcol / W_WIDTH(curwin); | |
| 1589 } | |
| 1590 if (start_row >= p_so) | |
| 1591 { | |
| 1592 #ifdef FEAT_DIFF | |
| 1593 if (curwin->w_topfill > 0) | |
| 1594 --curwin->w_topfill; | |
| 1595 else | |
| 1596 #endif | |
| 36 | 1597 { |
| 1598 #ifdef FEAT_FOLDING | |
| 1599 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline); | |
| 1600 #endif | |
| 7 | 1601 ++curwin->w_topline; |
| 36 | 1602 } |
| 7 | 1603 ++curwin->w_botline; /* approximate w_botline */ |
| 1604 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 1605 } | |
| 1606 } | |
| 1607 #endif /* FEAT_INS_EXPAND */ | |
| 1608 | |
| 1609 /* | |
| 1610 * Add one line above "lp->lnum". This can be a filler line, a closed fold or | |
| 1611 * a (wrapped) text line. Uses and sets "lp->fill". | |
| 1612 * Returns the height of the added line in "lp->height". | |
|
2082
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
1613 * Lines above the first one are incredibly high: MAXCOL. |
| 7 | 1614 */ |
| 1615 static void | |
| 1616 topline_back(lp) | |
| 1617 lineoff_T *lp; | |
| 1618 { | |
| 1619 #ifdef FEAT_DIFF | |
| 1620 if (lp->fill < diff_check_fill(curwin, lp->lnum)) | |
| 1621 { | |
| 1622 /* Add a filler line. */ | |
| 1623 ++lp->fill; | |
| 1624 lp->height = 1; | |
| 1625 } | |
| 1626 else | |
| 1627 #endif | |
| 1628 { | |
| 1629 --lp->lnum; | |
| 1630 #ifdef FEAT_DIFF | |
| 1631 lp->fill = 0; | |
| 1632 #endif | |
| 1633 if (lp->lnum < 1) | |
| 1634 lp->height = MAXCOL; | |
| 1635 else | |
| 1636 #ifdef FEAT_FOLDING | |
| 1637 if (hasFolding(lp->lnum, &lp->lnum, NULL)) | |
| 1638 /* Add a closed fold */ | |
| 1639 lp->height = 1; | |
| 1640 else | |
| 1641 #endif | |
| 1642 { | |
| 1643 #ifdef FEAT_DIFF | |
| 1644 lp->height = plines_nofill(lp->lnum); | |
| 1645 #else | |
| 1646 lp->height = plines(lp->lnum); | |
| 1647 #endif | |
| 1648 } | |
| 1649 } | |
| 1650 } | |
| 1651 | |
| 1652 /* | |
| 1653 * Add one line below "lp->lnum". This can be a filler line, a closed fold or | |
| 1654 * a (wrapped) text line. Uses and sets "lp->fill". | |
| 1655 * Returns the height of the added line in "lp->height". | |
| 1656 * Lines below the last one are incredibly high. | |
| 1657 */ | |
| 1658 static void | |
| 1659 botline_forw(lp) | |
| 1660 lineoff_T *lp; | |
| 1661 { | |
| 1662 #ifdef FEAT_DIFF | |
| 1663 if (lp->fill < diff_check_fill(curwin, lp->lnum + 1)) | |
| 1664 { | |
| 1665 /* Add a filler line. */ | |
| 1666 ++lp->fill; | |
| 1667 lp->height = 1; | |
| 1668 } | |
| 1669 else | |
| 1670 #endif | |
| 1671 { | |
| 1672 ++lp->lnum; | |
| 1673 #ifdef FEAT_DIFF | |
| 1674 lp->fill = 0; | |
| 1675 #endif | |
| 1676 if (lp->lnum > curbuf->b_ml.ml_line_count) | |
| 1677 lp->height = MAXCOL; | |
| 1678 else | |
| 1679 #ifdef FEAT_FOLDING | |
| 1680 if (hasFolding(lp->lnum, NULL, &lp->lnum)) | |
| 1681 /* Add a closed fold */ | |
| 1682 lp->height = 1; | |
| 1683 else | |
| 1684 #endif | |
| 1685 { | |
| 1686 #ifdef FEAT_DIFF | |
| 1687 lp->height = plines_nofill(lp->lnum); | |
| 1688 #else | |
| 1689 lp->height = plines(lp->lnum); | |
| 1690 #endif | |
| 1691 } | |
| 1692 } | |
| 1693 } | |
| 1694 | |
| 1695 #ifdef FEAT_DIFF | |
| 1696 /* | |
| 1697 * Switch from including filler lines below lp->lnum to including filler | |
| 1698 * lines above loff.lnum + 1. This keeps pointing to the same line. | |
| 1699 * When there are no filler lines nothing changes. | |
| 1700 */ | |
| 1701 static void | |
| 1702 botline_topline(lp) | |
| 1703 lineoff_T *lp; | |
| 1704 { | |
| 1705 if (lp->fill > 0) | |
| 1706 { | |
| 1707 ++lp->lnum; | |
| 1708 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1; | |
| 1709 } | |
| 1710 } | |
| 1711 | |
| 1712 /* | |
| 1713 * Switch from including filler lines above lp->lnum to including filler | |
| 1714 * lines below loff.lnum - 1. This keeps pointing to the same line. | |
| 1715 * When there are no filler lines nothing changes. | |
| 1716 */ | |
| 1717 static void | |
| 1718 topline_botline(lp) | |
| 1719 lineoff_T *lp; | |
| 1720 { | |
| 1721 if (lp->fill > 0) | |
| 1722 { | |
| 1723 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1; | |
| 1724 --lp->lnum; | |
| 1725 } | |
| 1726 } | |
| 1727 #endif | |
| 1728 | |
| 1729 /* | |
| 1730 * Recompute topline to put the cursor at the top of the window. | |
| 1731 * Scroll at least "min_scroll" lines. | |
| 1732 * If "always" is TRUE, always set topline (for "zt"). | |
| 1733 */ | |
| 1734 void | |
| 1735 scroll_cursor_top(min_scroll, always) | |
| 1736 int min_scroll; | |
| 1737 int always; | |
| 1738 { | |
| 1739 int scrolled = 0; | |
| 1740 int extra = 0; | |
| 1741 int used; | |
| 1742 int i; | |
| 1743 linenr_T top; /* just above displayed lines */ | |
| 1744 linenr_T bot; /* just below displayed lines */ | |
| 1745 linenr_T old_topline = curwin->w_topline; | |
| 1746 #ifdef FEAT_DIFF | |
| 1747 linenr_T old_topfill = curwin->w_topfill; | |
| 1748 #endif | |
| 1749 linenr_T new_topline; | |
| 1750 int off = p_so; | |
| 1751 | |
| 1752 #ifdef FEAT_MOUSE | |
| 1753 if (mouse_dragging > 0) | |
| 1754 off = mouse_dragging - 1; | |
| 1755 #endif | |
| 1756 | |
| 1757 /* | |
| 1758 * Decrease topline until: | |
| 1759 * - it has become 1 | |
| 1760 * - (part of) the cursor line is moved off the screen or | |
| 1761 * - moved at least 'scrolljump' lines and | |
| 1762 * - at least 'scrolloff' lines above and below the cursor | |
| 1763 */ | |
| 1764 validate_cheight(); | |
| 1765 used = curwin->w_cline_height; | |
| 1766 if (curwin->w_cursor.lnum < curwin->w_topline) | |
| 1767 scrolled = used; | |
| 1768 | |
| 1769 #ifdef FEAT_FOLDING | |
| 1770 if (hasFolding(curwin->w_cursor.lnum, &top, &bot)) | |
| 1771 { | |
| 1772 --top; | |
| 1773 ++bot; | |
| 1774 } | |
| 1775 else | |
| 1776 #endif | |
| 1777 { | |
| 1778 top = curwin->w_cursor.lnum - 1; | |
| 1779 bot = curwin->w_cursor.lnum + 1; | |
| 1780 } | |
| 1781 new_topline = top + 1; | |
| 1782 | |
| 1783 #ifdef FEAT_DIFF | |
| 1784 /* count filler lines of the cursor window as context */ | |
| 1785 i = diff_check_fill(curwin, curwin->w_cursor.lnum); | |
| 1786 used += i; | |
| 1787 extra += i; | |
| 1788 #endif | |
| 1789 | |
| 1790 /* | |
| 1791 * Check if the lines from "top" to "bot" fit in the window. If they do, | |
| 1792 * set new_topline and advance "top" and "bot" to include more lines. | |
| 1793 */ | |
| 1794 while (top > 0) | |
| 1795 { | |
| 1796 #ifdef FEAT_FOLDING | |
| 1797 if (hasFolding(top, &top, NULL)) | |
| 1798 /* count one logical line for a sequence of folded lines */ | |
| 1799 i = 1; | |
| 1800 else | |
| 1801 #endif | |
| 1802 i = plines(top); | |
| 1803 used += i; | |
| 1804 if (extra + i <= off && bot < curbuf->b_ml.ml_line_count) | |
| 1805 { | |
| 1806 #ifdef FEAT_FOLDING | |
| 1807 if (hasFolding(bot, NULL, &bot)) | |
| 1808 /* count one logical line for a sequence of folded lines */ | |
| 1809 ++used; | |
| 1810 else | |
| 1811 #endif | |
| 1812 used += plines(bot); | |
| 1813 } | |
| 1814 if (used > curwin->w_height) | |
| 1815 break; | |
| 1816 if (top < curwin->w_topline) | |
| 1817 scrolled += i; | |
| 1818 | |
| 1819 /* | |
| 1820 * If scrolling is needed, scroll at least 'sj' lines. | |
| 1821 */ | |
| 1822 if ((new_topline >= curwin->w_topline || scrolled > min_scroll) | |
| 1823 && extra >= off) | |
| 1824 break; | |
| 1825 | |
| 1826 extra += i; | |
| 1827 new_topline = top; | |
| 1828 --top; | |
| 1829 ++bot; | |
| 1830 } | |
| 1831 | |
| 1832 /* | |
| 1833 * If we don't have enough space, put cursor in the middle. | |
| 1834 * This makes sure we get the same position when using "k" and "j" | |
| 1835 * in a small window. | |
| 1836 */ | |
| 1837 if (used > curwin->w_height) | |
| 1838 scroll_cursor_halfway(FALSE); | |
| 1839 else | |
| 1840 { | |
| 1841 /* | |
| 1842 * If "always" is FALSE, only adjust topline to a lower value, higher | |
| 1843 * value may happen with wrapping lines | |
| 1844 */ | |
| 1845 if (new_topline < curwin->w_topline || always) | |
| 1846 curwin->w_topline = new_topline; | |
| 1847 if (curwin->w_topline > curwin->w_cursor.lnum) | |
| 1848 curwin->w_topline = curwin->w_cursor.lnum; | |
| 1849 #ifdef FEAT_DIFF | |
| 1850 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline); | |
| 1851 if (curwin->w_topfill > 0 && extra > off) | |
| 1852 { | |
| 1853 curwin->w_topfill -= extra - off; | |
| 1854 if (curwin->w_topfill < 0) | |
| 1855 curwin->w_topfill = 0; | |
| 1856 } | |
| 1857 check_topfill(curwin, FALSE); | |
| 1858 #endif | |
| 1859 if (curwin->w_topline != old_topline | |
| 1860 #ifdef FEAT_DIFF | |
| 1861 || curwin->w_topfill != old_topfill | |
| 1862 #endif | |
| 1863 ) | |
| 1864 curwin->w_valid &= | |
| 1865 ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 1866 curwin->w_valid |= VALID_TOPLINE; | |
| 1867 } | |
| 1868 } | |
| 1869 | |
| 1870 /* | |
| 1871 * Set w_empty_rows and w_filler_rows for window "wp", having used up "used" | |
| 1872 * screen lines for text lines. | |
| 1873 */ | |
| 1874 void | |
| 1875 set_empty_rows(wp, used) | |
| 1876 win_T *wp; | |
| 1877 int used; | |
| 1878 { | |
| 1879 #ifdef FEAT_DIFF | |
| 1880 wp->w_filler_rows = 0; | |
| 1881 #endif | |
| 1882 if (used == 0) | |
| 1883 wp->w_empty_rows = 0; /* single line that doesn't fit */ | |
| 1884 else | |
| 1885 { | |
| 1886 wp->w_empty_rows = wp->w_height - used; | |
| 1887 #ifdef FEAT_DIFF | |
| 1888 if (wp->w_botline <= wp->w_buffer->b_ml.ml_line_count) | |
| 1889 { | |
| 1890 wp->w_filler_rows = diff_check_fill(wp, wp->w_botline); | |
| 1891 if (wp->w_empty_rows > wp->w_filler_rows) | |
| 1892 wp->w_empty_rows -= wp->w_filler_rows; | |
| 1893 else | |
| 1894 { | |
| 1895 wp->w_filler_rows = wp->w_empty_rows; | |
| 1896 wp->w_empty_rows = 0; | |
| 1897 } | |
| 1898 } | |
| 1899 #endif | |
| 1900 } | |
| 1901 } | |
| 1902 | |
| 1903 /* | |
| 1904 * Recompute topline to put the cursor at the bottom of the window. | |
| 1905 * Scroll at least "min_scroll" lines. | |
| 1906 * If "set_topbot" is TRUE, set topline and botline first (for "zb"). | |
| 1907 * This is messy stuff!!! | |
| 1908 */ | |
| 1909 void | |
| 1910 scroll_cursor_bot(min_scroll, set_topbot) | |
| 1911 int min_scroll; | |
| 1912 int set_topbot; | |
| 1913 { | |
| 1914 int used; | |
| 1915 int scrolled = 0; | |
| 1916 int extra = 0; | |
| 1917 int i; | |
| 1918 linenr_T line_count; | |
| 1919 linenr_T old_topline = curwin->w_topline; | |
| 1920 lineoff_T loff; | |
| 1921 lineoff_T boff; | |
| 1922 #ifdef FEAT_DIFF | |
| 1923 int old_topfill = curwin->w_topfill; | |
| 1924 int fill_below_window; | |
| 1925 #endif | |
| 1926 linenr_T old_botline = curwin->w_botline; | |
| 1927 linenr_T old_valid = curwin->w_valid; | |
| 1928 int old_empty_rows = curwin->w_empty_rows; | |
| 1929 linenr_T cln; /* Cursor Line Number */ | |
| 1930 | |
| 1931 cln = curwin->w_cursor.lnum; | |
| 1932 if (set_topbot) | |
| 1933 { | |
| 1934 used = 0; | |
| 1935 curwin->w_botline = cln + 1; | |
| 1936 #ifdef FEAT_DIFF | |
| 1937 loff.fill = 0; | |
| 1938 #endif | |
| 1939 for (curwin->w_topline = curwin->w_botline; | |
| 1940 curwin->w_topline > 1; | |
| 1941 curwin->w_topline = loff.lnum) | |
| 1942 { | |
| 1943 loff.lnum = curwin->w_topline; | |
| 1944 topline_back(&loff); | |
|
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1945 if (loff.height == MAXCOL || used + loff.height > curwin->w_height) |
| 7 | 1946 break; |
| 1947 used += loff.height; | |
| 1948 #ifdef FEAT_DIFF | |
| 1949 curwin->w_topfill = loff.fill; | |
| 1950 #endif | |
| 1951 } | |
| 1952 set_empty_rows(curwin, used); | |
| 1953 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP; | |
| 1954 if (curwin->w_topline != old_topline | |
| 1955 #ifdef FEAT_DIFF | |
| 1956 || curwin->w_topfill != old_topfill | |
| 1957 #endif | |
| 1958 ) | |
| 1959 curwin->w_valid &= ~(VALID_WROW|VALID_CROW); | |
| 1960 } | |
| 1961 else | |
| 1962 validate_botline(); | |
| 1963 | |
| 1964 /* The lines of the cursor line itself are always used. */ | |
| 1965 #ifdef FEAT_DIFF | |
| 1966 used = plines_nofill(cln); | |
| 1967 #else | |
| 1968 validate_cheight(); | |
| 1969 used = curwin->w_cline_height; | |
| 1970 #endif | |
| 1971 | |
| 1972 /* If the cursor is below botline, we will at least scroll by the height | |
| 1973 * of the cursor line. Correct for empty lines, which are really part of | |
| 1974 * botline. */ | |
| 1975 if (cln >= curwin->w_botline) | |
| 1976 { | |
| 1977 scrolled = used; | |
| 1978 if (cln == curwin->w_botline) | |
| 1979 scrolled -= curwin->w_empty_rows; | |
| 1980 } | |
| 1981 | |
| 1982 /* | |
| 1983 * Stop counting lines to scroll when | |
| 1984 * - hitting start of the file | |
| 1985 * - scrolled nothing or at least 'sj' lines | |
| 1986 * - at least 'so' lines below the cursor | |
| 1987 * - lines between botline and cursor have been counted | |
| 1988 */ | |
| 1989 #ifdef FEAT_FOLDING | |
| 1990 if (!hasFolding(curwin->w_cursor.lnum, &loff.lnum, &boff.lnum)) | |
| 1991 #endif | |
| 1992 { | |
| 1993 loff.lnum = cln; | |
| 1994 boff.lnum = cln; | |
| 1995 } | |
| 1996 #ifdef FEAT_DIFF | |
| 1997 loff.fill = 0; | |
| 1998 boff.fill = 0; | |
| 1999 fill_below_window = diff_check_fill(curwin, curwin->w_botline) | |
| 2000 - curwin->w_filler_rows; | |
| 2001 #endif | |
| 2002 | |
| 2003 while (loff.lnum > 1) | |
| 2004 { | |
| 2005 /* Stop when scrolled nothing or at least "min_scroll", found "extra" | |
| 2006 * context for 'scrolloff' and counted all lines below the window. */ | |
| 2007 if ((((scrolled <= 0 || scrolled >= min_scroll) | |
| 2008 && extra >= ( | |
| 2009 #ifdef FEAT_MOUSE | |
| 1121 | 2010 mouse_dragging > 0 ? mouse_dragging - 1 : |
| 7 | 2011 #endif |
| 2012 p_so)) | |
| 2013 || boff.lnum + 1 > curbuf->b_ml.ml_line_count) | |
| 2014 && loff.lnum <= curwin->w_botline | |
| 2015 #ifdef FEAT_DIFF | |
| 2016 && (loff.lnum < curwin->w_botline | |
| 2017 || loff.fill >= fill_below_window) | |
| 2018 #endif | |
| 2019 ) | |
| 2020 break; | |
| 2021 | |
| 2022 /* Add one line above */ | |
| 2023 topline_back(&loff); | |
|
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2024 if (loff.height == MAXCOL) |
|
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2025 used = MAXCOL; |
|
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2026 else |
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|
2027 used += loff.height; |
| 7 | 2028 if (used > curwin->w_height) |
| 2029 break; | |
| 2030 if (loff.lnum >= curwin->w_botline | |
| 2031 #ifdef FEAT_DIFF | |
| 2032 && (loff.lnum > curwin->w_botline | |
| 2033 || loff.fill <= fill_below_window) | |
| 2034 #endif | |
| 2035 ) | |
| 2036 { | |
| 2037 /* Count screen lines that are below the window. */ | |
| 2038 scrolled += loff.height; | |
| 2039 if (loff.lnum == curwin->w_botline | |
| 2040 #ifdef FEAT_DIFF | |
| 2041 && boff.fill == 0 | |
| 2042 #endif | |
| 2043 ) | |
| 2044 scrolled -= curwin->w_empty_rows; | |
| 2045 } | |
| 2046 | |
| 2047 if (boff.lnum < curbuf->b_ml.ml_line_count) | |
| 2048 { | |
| 2049 /* Add one line below */ | |
| 2050 botline_forw(&boff); | |
| 2051 used += boff.height; | |
| 2052 if (used > curwin->w_height) | |
| 2053 break; | |
| 2054 if (extra < ( | |
| 2055 #ifdef FEAT_MOUSE | |
| 2056 mouse_dragging > 0 ? mouse_dragging - 1 : | |
| 2057 #endif | |
| 2058 p_so) || scrolled < min_scroll) | |
| 2059 { | |
| 2060 extra += boff.height; | |
| 2061 if (boff.lnum >= curwin->w_botline | |
| 2062 #ifdef FEAT_DIFF | |
| 2063 || (boff.lnum + 1 == curwin->w_botline | |
| 2064 && boff.fill > curwin->w_filler_rows) | |
| 2065 #endif | |
| 2066 ) | |
| 2067 { | |
| 2068 /* Count screen lines that are below the window. */ | |
| 2069 scrolled += boff.height; | |
| 2070 if (boff.lnum == curwin->w_botline | |
| 2071 #ifdef FEAT_DIFF | |
| 2072 && boff.fill == 0 | |
| 2073 #endif | |
| 2074 ) | |
| 2075 scrolled -= curwin->w_empty_rows; | |
| 2076 } | |
| 2077 } | |
| 2078 } | |
| 2079 } | |
| 2080 | |
| 2081 /* curwin->w_empty_rows is larger, no need to scroll */ | |
| 2082 if (scrolled <= 0) | |
| 2083 line_count = 0; | |
| 2084 /* more than a screenfull, don't scroll but redraw */ | |
| 2085 else if (used > curwin->w_height) | |
| 2086 line_count = used; | |
| 2087 /* scroll minimal number of lines */ | |
| 2088 else | |
| 2089 { | |
| 2090 line_count = 0; | |
| 2091 #ifdef FEAT_DIFF | |
| 2092 boff.fill = curwin->w_topfill; | |
| 2093 #endif | |
| 2094 boff.lnum = curwin->w_topline - 1; | |
| 2095 for (i = 0; i < scrolled && boff.lnum < curwin->w_botline; ) | |
| 2096 { | |
| 2097 botline_forw(&boff); | |
| 2098 i += boff.height; | |
| 2099 ++line_count; | |
| 2100 } | |
| 2101 if (i < scrolled) /* below curwin->w_botline, don't scroll */ | |
| 2102 line_count = 9999; | |
| 2103 } | |
| 2104 | |
| 2105 /* | |
| 2106 * Scroll up if the cursor is off the bottom of the screen a bit. | |
| 2107 * Otherwise put it at 1/2 of the screen. | |
| 2108 */ | |
| 2109 if (line_count >= curwin->w_height && line_count > min_scroll) | |
| 2110 scroll_cursor_halfway(FALSE); | |
| 2111 else | |
| 2112 scrollup(line_count, TRUE); | |
| 2113 | |
| 2114 /* | |
| 2115 * If topline didn't change we need to restore w_botline and w_empty_rows | |
| 2116 * (we changed them). | |
| 2117 * If topline did change, update_screen() will set botline. | |
| 2118 */ | |
| 2119 if (curwin->w_topline == old_topline && set_topbot) | |
| 2120 { | |
| 2121 curwin->w_botline = old_botline; | |
| 2122 curwin->w_empty_rows = old_empty_rows; | |
| 2123 curwin->w_valid = old_valid; | |
| 2124 } | |
| 2125 curwin->w_valid |= VALID_TOPLINE; | |
| 2126 } | |
| 2127 | |
| 2128 /* | |
| 2129 * Recompute topline to put the cursor halfway the window | |
| 2130 * If "atend" is TRUE, also put it halfway at the end of the file. | |
| 2131 */ | |
| 2132 void | |
| 2133 scroll_cursor_halfway(atend) | |
| 2134 int atend; | |
| 2135 { | |
| 2136 int above = 0; | |
| 2137 linenr_T topline; | |
| 2138 #ifdef FEAT_DIFF | |
| 2139 int topfill = 0; | |
| 2140 #endif | |
| 2141 int below = 0; | |
| 2142 int used; | |
| 2143 lineoff_T loff; | |
| 2144 lineoff_T boff; | |
| 2145 | |
| 2146 loff.lnum = boff.lnum = curwin->w_cursor.lnum; | |
| 2147 #ifdef FEAT_FOLDING | |
| 2148 (void)hasFolding(loff.lnum, &loff.lnum, &boff.lnum); | |
| 2149 #endif | |
| 2150 #ifdef FEAT_DIFF | |
| 2151 used = plines_nofill(loff.lnum); | |
| 2152 loff.fill = 0; | |
| 2153 boff.fill = 0; | |
| 2154 #else | |
| 2155 used = plines(loff.lnum); | |
| 2156 #endif | |
| 2157 topline = loff.lnum; | |
| 2158 while (topline > 1) | |
| 2159 { | |
| 2160 if (below <= above) /* add a line below the cursor first */ | |
| 2161 { | |
| 2162 if (boff.lnum < curbuf->b_ml.ml_line_count) | |
| 2163 { | |
| 2164 botline_forw(&boff); | |
| 2165 used += boff.height; | |
| 2166 if (used > curwin->w_height) | |
| 2167 break; | |
| 2168 below += boff.height; | |
| 2169 } | |
| 2170 else | |
| 2171 { | |
| 2172 ++below; /* count a "~" line */ | |
| 2173 if (atend) | |
| 2174 ++used; | |
| 2175 } | |
| 2176 } | |
| 2177 | |
| 2178 if (below > above) /* add a line above the cursor */ | |
| 2179 { | |
| 2180 topline_back(&loff); | |
|
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2181 if (loff.height == MAXCOL) |
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2182 used = MAXCOL; |
|
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2183 else |
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2184 used += loff.height; |
| 7 | 2185 if (used > curwin->w_height) |
| 2186 break; | |
| 2187 above += loff.height; | |
| 2188 topline = loff.lnum; | |
| 2189 #ifdef FEAT_DIFF | |
| 2190 topfill = loff.fill; | |
| 2191 #endif | |
| 2192 } | |
| 2193 } | |
| 2194 #ifdef FEAT_FOLDING | |
| 2195 if (!hasFolding(topline, &curwin->w_topline, NULL)) | |
| 2196 #endif | |
| 2197 curwin->w_topline = topline; | |
| 2198 #ifdef FEAT_DIFF | |
| 2199 curwin->w_topfill = topfill; | |
| 2200 check_topfill(curwin, FALSE); | |
| 2201 #endif | |
| 2202 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 2203 curwin->w_valid |= VALID_TOPLINE; | |
| 2204 } | |
| 2205 | |
| 2206 /* | |
| 2207 * Correct the cursor position so that it is in a part of the screen at least | |
| 2208 * 'so' lines from the top and bottom, if possible. | |
| 2209 * If not possible, put it at the same position as scroll_cursor_halfway(). | |
| 2210 * When called topline must be valid! | |
| 2211 */ | |
| 2212 void | |
| 2213 cursor_correct() | |
| 2214 { | |
| 2215 int above = 0; /* screen lines above topline */ | |
| 2216 linenr_T topline; | |
| 2217 int below = 0; /* screen lines below botline */ | |
| 2218 linenr_T botline; | |
| 2219 int above_wanted, below_wanted; | |
| 2220 linenr_T cln; /* Cursor Line Number */ | |
| 2221 int max_off; | |
| 2222 | |
| 2223 /* | |
| 2224 * How many lines we would like to have above/below the cursor depends on | |
| 2225 * whether the first/last line of the file is on screen. | |
| 2226 */ | |
| 2227 above_wanted = p_so; | |
| 2228 below_wanted = p_so; | |
| 2229 #ifdef FEAT_MOUSE | |
| 1121 | 2230 if (mouse_dragging > 0) |
| 7 | 2231 { |
| 2232 above_wanted = mouse_dragging - 1; | |
| 2233 below_wanted = mouse_dragging - 1; | |
| 2234 } | |
| 2235 #endif | |
| 2236 if (curwin->w_topline == 1) | |
| 2237 { | |
| 2238 above_wanted = 0; | |
| 2239 max_off = curwin->w_height / 2; | |
| 2240 if (below_wanted > max_off) | |
| 2241 below_wanted = max_off; | |
| 2242 } | |
| 2243 validate_botline(); | |
| 2244 if (curwin->w_botline == curbuf->b_ml.ml_line_count + 1 | |
| 2245 #ifdef FEAT_MOUSE | |
| 1121 | 2246 && mouse_dragging == 0 |
| 7 | 2247 #endif |
| 2248 ) | |
| 2249 { | |
| 2250 below_wanted = 0; | |
| 2251 max_off = (curwin->w_height - 1) / 2; | |
| 2252 if (above_wanted > max_off) | |
| 2253 above_wanted = max_off; | |
| 2254 } | |
| 2255 | |
| 2256 /* | |
| 2257 * If there are sufficient file-lines above and below the cursor, we can | |
| 2258 * return now. | |
| 2259 */ | |
| 2260 cln = curwin->w_cursor.lnum; | |
| 2261 if (cln >= curwin->w_topline + above_wanted | |
| 2262 && cln < curwin->w_botline - below_wanted | |
| 2263 #ifdef FEAT_FOLDING | |
| 2264 && !hasAnyFolding(curwin) | |
| 2265 #endif | |
| 2266 ) | |
| 2267 return; | |
| 2268 | |
| 2269 /* | |
| 2270 * Narrow down the area where the cursor can be put by taking lines from | |
| 2271 * the top and the bottom until: | |
| 2272 * - the desired context lines are found | |
| 2273 * - the lines from the top is past the lines from the bottom | |
| 2274 */ | |
| 2275 topline = curwin->w_topline; | |
| 2276 botline = curwin->w_botline - 1; | |
| 2277 #ifdef FEAT_DIFF | |
| 2278 /* count filler lines as context */ | |
| 2279 above = curwin->w_topfill; | |
| 2280 below = curwin->w_filler_rows; | |
| 2281 #endif | |
| 2282 while ((above < above_wanted || below < below_wanted) && topline < botline) | |
| 2283 { | |
| 2284 if (below < below_wanted && (below <= above || above >= above_wanted)) | |
| 2285 { | |
| 2286 #ifdef FEAT_FOLDING | |
| 2287 if (hasFolding(botline, &botline, NULL)) | |
| 2288 ++below; | |
| 2289 else | |
| 2290 #endif | |
| 2291 below += plines(botline); | |
| 2292 --botline; | |
| 2293 } | |
| 2294 if (above < above_wanted && (above < below || below >= below_wanted)) | |
| 2295 { | |
| 2296 #ifdef FEAT_FOLDING | |
| 2297 if (hasFolding(topline, NULL, &topline)) | |
| 2298 ++above; | |
| 2299 else | |
| 2300 #endif | |
| 2301 #ifndef FEAT_DIFF | |
| 2302 above += plines(topline); | |
| 2303 #else | |
| 2304 above += plines_nofill(topline); | |
| 2305 | |
| 2306 /* Count filler lines below this line as context. */ | |
| 2307 if (topline < botline) | |
| 2308 above += diff_check_fill(curwin, topline + 1); | |
| 2309 #endif | |
| 2310 ++topline; | |
| 2311 } | |
| 2312 } | |
| 2313 if (topline == botline || botline == 0) | |
| 2314 curwin->w_cursor.lnum = topline; | |
| 2315 else if (topline > botline) | |
| 2316 curwin->w_cursor.lnum = botline; | |
| 2317 else | |
| 2318 { | |
| 2319 if (cln < topline && curwin->w_topline > 1) | |
| 2320 { | |
| 2321 curwin->w_cursor.lnum = topline; | |
| 2322 curwin->w_valid &= | |
| 2323 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW); | |
| 2324 } | |
| 2325 if (cln > botline && curwin->w_botline <= curbuf->b_ml.ml_line_count) | |
| 2326 { | |
| 2327 curwin->w_cursor.lnum = botline; | |
| 2328 curwin->w_valid &= | |
| 2329 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW); | |
| 2330 } | |
| 2331 } | |
| 2332 curwin->w_valid |= VALID_TOPLINE; | |
| 2333 } | |
| 2334 | |
| 2335 static void get_scroll_overlap __ARGS((lineoff_T *lp, int dir)); | |
| 2336 | |
| 2337 /* | |
| 2338 * move screen 'count' pages up or down and update screen | |
| 2339 * | |
| 2340 * return FAIL for failure, OK otherwise | |
| 2341 */ | |
| 2342 int | |
| 2343 onepage(dir, count) | |
| 2344 int dir; | |
| 2345 long count; | |
| 2346 { | |
| 2347 long n; | |
| 2348 int retval = OK; | |
| 2349 lineoff_T loff; | |
| 2350 linenr_T old_topline = curwin->w_topline; | |
| 2351 | |
| 2352 if (curbuf->b_ml.ml_line_count == 1) /* nothing to do */ | |
| 2353 { | |
| 2354 beep_flush(); | |
| 2355 return FAIL; | |
| 2356 } | |
| 2357 | |
| 2358 for ( ; count > 0; --count) | |
| 2359 { | |
| 2360 validate_botline(); | |
| 2361 /* | |
| 2362 * It's an error to move a page up when the first line is already on | |
| 2363 * the screen. It's an error to move a page down when the last line | |
| 2364 * is on the screen and the topline is 'scrolloff' lines from the | |
| 2365 * last line. | |
| 2366 */ | |
| 2367 if (dir == FORWARD | |
| 2368 ? ((curwin->w_topline >= curbuf->b_ml.ml_line_count - p_so) | |
| 2369 && curwin->w_botline > curbuf->b_ml.ml_line_count) | |
| 2370 : (curwin->w_topline == 1 | |
| 2371 #ifdef FEAT_DIFF | |
| 2372 && curwin->w_topfill == | |
| 2373 diff_check_fill(curwin, curwin->w_topline) | |
| 2374 #endif | |
| 2375 )) | |
| 2376 { | |
| 2377 beep_flush(); | |
| 2378 retval = FAIL; | |
| 2379 break; | |
| 2380 } | |
| 2381 | |
| 2382 #ifdef FEAT_DIFF | |
| 2383 loff.fill = 0; | |
| 2384 #endif | |
| 2385 if (dir == FORWARD) | |
| 2386 { | |
| 164 | 2387 if (firstwin == lastwin && p_window > 0 && p_window < Rows - 1) |
| 7 | 2388 { |
| 164 | 2389 /* Vi compatible scrolling */ |
| 2390 if (p_window <= 2) | |
| 2391 ++curwin->w_topline; | |
| 2392 else | |
| 2393 curwin->w_topline += p_window - 2; | |
| 2394 if (curwin->w_topline > curbuf->b_ml.ml_line_count) | |
| 2395 curwin->w_topline = curbuf->b_ml.ml_line_count; | |
| 2396 curwin->w_cursor.lnum = curwin->w_topline; | |
| 2397 } | |
| 2398 else if (curwin->w_botline > curbuf->b_ml.ml_line_count) | |
| 2399 { | |
| 2400 /* at end of file */ | |
| 7 | 2401 curwin->w_topline = curbuf->b_ml.ml_line_count; |
| 2402 #ifdef FEAT_DIFF | |
| 2403 curwin->w_topfill = 0; | |
| 2404 #endif | |
| 2405 curwin->w_valid &= ~(VALID_WROW|VALID_CROW); | |
| 2406 } | |
| 2407 else | |
| 2408 { | |
| 2409 /* For the overlap, start with the line just below the window | |
| 2410 * and go upwards. */ | |
| 2411 loff.lnum = curwin->w_botline; | |
| 2412 #ifdef FEAT_DIFF | |
| 2413 loff.fill = diff_check_fill(curwin, loff.lnum) | |
| 2414 - curwin->w_filler_rows; | |
| 2415 #endif | |
| 2416 get_scroll_overlap(&loff, -1); | |
| 2417 curwin->w_topline = loff.lnum; | |
| 2418 #ifdef FEAT_DIFF | |
| 2419 curwin->w_topfill = loff.fill; | |
| 2420 check_topfill(curwin, FALSE); | |
| 2421 #endif | |
| 2422 curwin->w_cursor.lnum = curwin->w_topline; | |
| 2423 curwin->w_valid &= ~(VALID_WCOL|VALID_CHEIGHT|VALID_WROW| | |
| 2424 VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 2425 } | |
| 2426 } | |
| 2427 else /* dir == BACKWARDS */ | |
| 2428 { | |
| 2429 #ifdef FEAT_DIFF | |
| 2430 if (curwin->w_topline == 1) | |
| 2431 { | |
| 2432 /* Include max number of filler lines */ | |
| 2433 max_topfill(); | |
| 2434 continue; | |
| 2435 } | |
| 2436 #endif | |
| 164 | 2437 if (firstwin == lastwin && p_window > 0 && p_window < Rows - 1) |
| 2438 { | |
| 2439 /* Vi compatible scrolling (sort of) */ | |
| 2440 if (p_window <= 2) | |
| 2441 --curwin->w_topline; | |
| 2442 else | |
| 2443 curwin->w_topline -= p_window - 2; | |
| 2444 if (curwin->w_topline < 1) | |
| 2445 curwin->w_topline = 1; | |
| 2446 curwin->w_cursor.lnum = curwin->w_topline + p_window - 1; | |
| 2447 if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count) | |
| 2448 curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count; | |
| 2449 continue; | |
| 2450 } | |
| 2451 | |
| 7 | 2452 /* Find the line at the top of the window that is going to be the |
| 2453 * line at the bottom of the window. Make sure this results in | |
| 2454 * the same line as before doing CTRL-F. */ | |
| 2455 loff.lnum = curwin->w_topline - 1; | |
| 2456 #ifdef FEAT_DIFF | |
| 2457 loff.fill = diff_check_fill(curwin, loff.lnum + 1) | |
| 2458 - curwin->w_topfill; | |
| 2459 #endif | |
| 2460 get_scroll_overlap(&loff, 1); | |
| 2461 | |
| 2462 if (loff.lnum >= curbuf->b_ml.ml_line_count) | |
| 2463 { | |
| 2464 loff.lnum = curbuf->b_ml.ml_line_count; | |
| 2465 #ifdef FEAT_DIFF | |
| 2466 loff.fill = 0; | |
| 2467 } | |
| 2468 else | |
| 2469 { | |
| 2470 botline_topline(&loff); | |
| 2471 #endif | |
| 2472 } | |
| 2473 curwin->w_cursor.lnum = loff.lnum; | |
| 2474 | |
| 2475 /* Find the line just above the new topline to get the right line | |
| 2476 * at the bottom of the window. */ | |
| 2477 n = 0; | |
| 2478 while (n <= curwin->w_height && loff.lnum >= 1) | |
| 2479 { | |
| 2480 topline_back(&loff); | |
|
2082
8ca3c9ad0bee
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Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2481 if (loff.height == MAXCOL) |
|
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2482 n = MAXCOL; |
|
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2483 else |
|
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2484 n += loff.height; |
| 7 | 2485 } |
|
2082
8ca3c9ad0bee
updated for version 7.2.366
Bram Moolenaar <bram@zimbu.org>
parents:
2070
diff
changeset
|
2486 if (loff.lnum < 1) /* at begin of file */ |
| 7 | 2487 { |
| 2488 curwin->w_topline = 1; | |
| 2489 #ifdef FEAT_DIFF | |
| 2490 max_topfill(); | |
| 2491 #endif | |
| 2492 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 2493 } | |
| 2494 else | |
| 2495 { | |
| 2496 /* Go two lines forward again. */ | |
| 2497 #ifdef FEAT_DIFF | |
| 2498 topline_botline(&loff); | |
| 2499 #endif | |
| 2500 botline_forw(&loff); | |
| 2501 botline_forw(&loff); | |
| 2502 #ifdef FEAT_DIFF | |
| 2503 botline_topline(&loff); | |
| 2504 #endif | |
| 2505 #ifdef FEAT_FOLDING | |
| 2506 /* We're at the wrong end of a fold now. */ | |
| 2507 (void)hasFolding(loff.lnum, &loff.lnum, NULL); | |
| 2508 #endif | |
| 2509 | |
| 2510 /* Always scroll at least one line. Avoid getting stuck on | |
| 2511 * very long lines. */ | |
| 2512 if (loff.lnum >= curwin->w_topline | |
| 2513 #ifdef FEAT_DIFF | |
| 2514 && (loff.lnum > curwin->w_topline | |
| 2515 || loff.fill >= curwin->w_topfill) | |
| 2516 #endif | |
| 2517 ) | |
| 2518 { | |
| 2519 #ifdef FEAT_DIFF | |
| 2520 /* First try using the maximum number of filler lines. If | |
| 2521 * that's not enough, backup one line. */ | |
| 2522 loff.fill = curwin->w_topfill; | |
| 2523 if (curwin->w_topfill < diff_check_fill(curwin, | |
| 2524 curwin->w_topline)) | |
| 2525 max_topfill(); | |
| 2526 if (curwin->w_topfill == loff.fill) | |
| 2527 #endif | |
| 2528 { | |
| 2529 --curwin->w_topline; | |
| 2530 #ifdef FEAT_DIFF | |
| 2531 curwin->w_topfill = 0; | |
| 2532 #endif | |
| 2533 } | |
| 2534 comp_botline(curwin); | |
| 2535 curwin->w_cursor.lnum = curwin->w_botline - 1; | |
| 2536 curwin->w_valid &= ~(VALID_WCOL|VALID_CHEIGHT| | |
| 2537 VALID_WROW|VALID_CROW); | |
| 2538 } | |
| 2539 else | |
| 2540 { | |
| 2541 curwin->w_topline = loff.lnum; | |
| 2542 #ifdef FEAT_DIFF | |
| 2543 curwin->w_topfill = loff.fill; | |
| 2544 check_topfill(curwin, FALSE); | |
| 2545 #endif | |
| 2546 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE); | |
| 2547 } | |
| 2548 } | |
| 2549 } | |
| 2550 } | |
| 2551 #ifdef FEAT_FOLDING | |
| 2552 foldAdjustCursor(); | |
| 2553 #endif | |
| 2554 cursor_correct(); | |
| 161 | 2555 if (retval == OK) |
| 2556 beginline(BL_SOL | BL_FIX); | |
| 7 | 2557 curwin->w_valid &= ~(VALID_WCOL|VALID_WROW|VALID_VIRTCOL); |
| 2558 | |
| 2559 /* | |
| 2560 * Avoid the screen jumping up and down when 'scrolloff' is non-zero. | |
| 2561 * But make sure we scroll at least one line (happens with mix of long | |
| 2562 * wrapping lines and non-wrapping line). | |
| 2563 */ | |
| 2564 if (retval == OK && dir == FORWARD && check_top_offset()) | |
| 2565 { | |
| 2566 scroll_cursor_top(1, FALSE); | |
| 2567 if (curwin->w_topline <= old_topline | |
| 2568 && old_topline < curbuf->b_ml.ml_line_count) | |
| 2569 { | |
| 2570 curwin->w_topline = old_topline + 1; | |
| 2571 #ifdef FEAT_FOLDING | |
| 2572 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 2573 #endif | |
| 2574 } | |
| 2575 } | |
| 2576 | |
| 2577 redraw_later(VALID); | |
| 2578 return retval; | |
| 2579 } | |
| 2580 | |
| 2581 /* | |
| 2582 * Decide how much overlap to use for page-up or page-down scrolling. | |
| 2583 * This is symmetric, so that doing both keeps the same lines displayed. | |
| 2584 * Three lines are examined: | |
| 2585 * | |
| 2586 * before CTRL-F after CTRL-F / before CTRL-B | |
| 2587 * etc. l1 | |
| 2588 * l1 last but one line ------------ | |
| 2589 * l2 last text line l2 top text line | |
| 2590 * ------------- l3 second text line | |
| 2591 * l3 etc. | |
| 2592 */ | |
| 2593 static void | |
| 2594 get_scroll_overlap(lp, dir) | |
| 2595 lineoff_T *lp; | |
| 2596 int dir; | |
| 2597 { | |
| 2598 int h1, h2, h3, h4; | |
| 2599 int min_height = curwin->w_height - 2; | |
| 2600 lineoff_T loff0, loff1, loff2; | |
| 2601 | |
| 2602 #ifdef FEAT_DIFF | |
| 2603 if (lp->fill > 0) | |
| 2604 lp->height = 1; | |
| 2605 else | |
| 2606 lp->height = plines_nofill(lp->lnum); | |
| 2607 #else | |
| 2608 lp->height = plines(lp->lnum); | |
| 2609 #endif | |
| 2610 h1 = lp->height; | |
| 2611 if (h1 > min_height) | |
| 2612 return; /* no overlap */ | |
| 2613 | |
| 2614 loff0 = *lp; | |
| 2615 if (dir > 0) | |
| 2616 botline_forw(lp); | |
| 2617 else | |
| 2618 topline_back(lp); | |
| 2619 h2 = lp->height; | |
| 2620 if (h2 + h1 > min_height) | |
| 2621 { | |
| 2622 *lp = loff0; /* no overlap */ | |
| 2623 return; | |
| 2624 } | |
| 2625 | |
| 2626 loff1 = *lp; | |
| 2627 if (dir > 0) | |
| 2628 botline_forw(lp); | |
| 2629 else | |
| 2630 topline_back(lp); | |
| 2631 h3 = lp->height; | |
| 2632 if (h3 + h2 > min_height) | |
| 2633 { | |
| 2634 *lp = loff0; /* no overlap */ | |
| 2635 return; | |
| 2636 } | |
| 2637 | |
| 2638 loff2 = *lp; | |
| 2639 if (dir > 0) | |
| 2640 botline_forw(lp); | |
| 2641 else | |
| 2642 topline_back(lp); | |
| 2643 h4 = lp->height; | |
| 2644 if (h4 + h3 + h2 > min_height || h3 + h2 + h1 > min_height) | |
| 2645 *lp = loff1; /* 1 line overlap */ | |
| 2646 else | |
| 2647 *lp = loff2; /* 2 lines overlap */ | |
| 2648 return; | |
| 2649 } | |
| 2650 | |
| 2651 /* #define KEEP_SCREEN_LINE */ | |
| 2652 /* | |
| 2653 * Scroll 'scroll' lines up or down. | |
| 2654 */ | |
| 2655 void | |
| 2656 halfpage(flag, Prenum) | |
| 2657 int flag; | |
| 2658 linenr_T Prenum; | |
| 2659 { | |
| 2660 long scrolled = 0; | |
| 2661 int i; | |
| 2662 int n; | |
| 2663 int room; | |
| 2664 | |
| 2665 if (Prenum) | |
| 2666 curwin->w_p_scr = (Prenum > curwin->w_height) ? | |
| 2667 curwin->w_height : Prenum; | |
| 2668 n = (curwin->w_p_scr <= curwin->w_height) ? | |
| 2669 curwin->w_p_scr : curwin->w_height; | |
| 2670 | |
| 2671 validate_botline(); | |
| 2672 room = curwin->w_empty_rows; | |
| 2673 #ifdef FEAT_DIFF | |
| 2674 room += curwin->w_filler_rows; | |
| 2675 #endif | |
| 2676 if (flag) | |
| 2677 { | |
| 2678 /* | |
| 2679 * scroll the text up | |
| 2680 */ | |
| 2681 while (n > 0 && curwin->w_botline <= curbuf->b_ml.ml_line_count) | |
| 2682 { | |
| 2683 #ifdef FEAT_DIFF | |
| 2684 if (curwin->w_topfill > 0) | |
| 2685 { | |
| 2686 i = 1; | |
| 2687 if (--n < 0 && scrolled > 0) | |
| 2688 break; | |
| 2689 --curwin->w_topfill; | |
| 2690 } | |
| 2691 else | |
| 2692 #endif | |
| 2693 { | |
| 2694 #ifdef FEAT_DIFF | |
| 2695 i = plines_nofill(curwin->w_topline); | |
| 2696 #else | |
| 2697 i = plines(curwin->w_topline); | |
| 2698 #endif | |
| 2699 n -= i; | |
| 2700 if (n < 0 && scrolled > 0) | |
| 2701 break; | |
| 2702 #ifdef FEAT_FOLDING | |
| 2703 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline); | |
| 2704 #endif | |
| 2705 ++curwin->w_topline; | |
| 2706 #ifdef FEAT_DIFF | |
| 2707 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline); | |
| 2708 #endif | |
| 2709 | |
| 2710 #ifndef KEEP_SCREEN_LINE | |
| 2711 if (curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count) | |
| 2712 { | |
| 2713 ++curwin->w_cursor.lnum; | |
| 2714 curwin->w_valid &= | |
| 2715 ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL); | |
| 2716 } | |
| 2717 #endif | |
| 2718 } | |
| 2719 curwin->w_valid &= ~(VALID_CROW|VALID_WROW); | |
| 2720 scrolled += i; | |
| 2721 | |
| 2722 /* | |
| 2723 * Correct w_botline for changed w_topline. | |
| 2724 * Won't work when there are filler lines. | |
| 2725 */ | |
| 2726 #ifdef FEAT_DIFF | |
| 2727 if (curwin->w_p_diff) | |
| 2728 curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 2729 else | |
| 2730 #endif | |
| 2731 { | |
| 2732 room += i; | |
| 2733 do | |
| 2734 { | |
| 2735 i = plines(curwin->w_botline); | |
| 2736 if (i > room) | |
| 2737 break; | |
| 2738 #ifdef FEAT_FOLDING | |
| 2739 (void)hasFolding(curwin->w_botline, NULL, | |
| 2740 &curwin->w_botline); | |
| 2741 #endif | |
| 2742 ++curwin->w_botline; | |
| 2743 room -= i; | |
| 2744 } while (curwin->w_botline <= curbuf->b_ml.ml_line_count); | |
| 2745 } | |
| 2746 } | |
| 2747 | |
| 2748 #ifndef KEEP_SCREEN_LINE | |
| 2749 /* | |
| 2750 * When hit bottom of the file: move cursor down. | |
| 2751 */ | |
| 2752 if (n > 0) | |
| 2753 { | |
| 2754 # ifdef FEAT_FOLDING | |
| 2755 if (hasAnyFolding(curwin)) | |
| 2756 { | |
| 2757 while (--n >= 0 | |
| 2758 && curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count) | |
| 2759 { | |
| 2760 (void)hasFolding(curwin->w_cursor.lnum, NULL, | |
| 2761 &curwin->w_cursor.lnum); | |
| 2762 ++curwin->w_cursor.lnum; | |
| 2763 } | |
| 2764 } | |
| 2765 else | |
| 2766 # endif | |
| 2767 curwin->w_cursor.lnum += n; | |
| 2768 check_cursor_lnum(); | |
| 2769 } | |
| 2770 #else | |
| 2771 /* try to put the cursor in the same screen line */ | |
| 2772 while ((curwin->w_cursor.lnum < curwin->w_topline || scrolled > 0) | |
| 2773 && curwin->w_cursor.lnum < curwin->w_botline - 1) | |
| 2774 { | |
| 2775 scrolled -= plines(curwin->w_cursor.lnum); | |
| 2776 if (scrolled < 0 && curwin->w_cursor.lnum >= curwin->w_topline) | |
| 2777 break; | |
| 2778 # ifdef FEAT_FOLDING | |
| 2779 (void)hasFolding(curwin->w_cursor.lnum, NULL, | |
| 2780 &curwin->w_cursor.lnum); | |
| 2781 # endif | |
| 2782 ++curwin->w_cursor.lnum; | |
| 2783 } | |
| 2784 #endif | |
| 2785 } | |
| 2786 else | |
| 2787 { | |
| 2788 /* | |
| 2789 * scroll the text down | |
| 2790 */ | |
| 2791 while (n > 0 && curwin->w_topline > 1) | |
| 2792 { | |
| 2793 #ifdef FEAT_DIFF | |
| 2794 if (curwin->w_topfill < diff_check_fill(curwin, curwin->w_topline)) | |
| 2795 { | |
| 2796 i = 1; | |
| 2797 if (--n < 0 && scrolled > 0) | |
| 2798 break; | |
| 2799 ++curwin->w_topfill; | |
| 2800 } | |
| 2801 else | |
| 2802 #endif | |
| 2803 { | |
| 2804 #ifdef FEAT_DIFF | |
| 2805 i = plines_nofill(curwin->w_topline - 1); | |
| 2806 #else | |
| 2807 i = plines(curwin->w_topline - 1); | |
| 2808 #endif | |
| 2809 n -= i; | |
| 2810 if (n < 0 && scrolled > 0) | |
| 2811 break; | |
| 2812 --curwin->w_topline; | |
| 2813 #ifdef FEAT_FOLDING | |
| 2814 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL); | |
| 2815 #endif | |
| 2816 #ifdef FEAT_DIFF | |
| 2817 curwin->w_topfill = 0; | |
| 2818 #endif | |
| 2819 } | |
| 2820 curwin->w_valid &= ~(VALID_CROW|VALID_WROW| | |
| 2821 VALID_BOTLINE|VALID_BOTLINE_AP); | |
| 2822 scrolled += i; | |
| 2823 #ifndef KEEP_SCREEN_LINE | |
| 2824 if (curwin->w_cursor.lnum > 1) | |
| 2825 { | |
| 2826 --curwin->w_cursor.lnum; | |
| 2827 curwin->w_valid &= ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL); | |
| 2828 } | |
| 2829 #endif | |
| 2830 } | |
| 2831 #ifndef KEEP_SCREEN_LINE | |
| 2832 /* | |
| 2833 * When hit top of the file: move cursor up. | |
| 2834 */ | |
| 2835 if (n > 0) | |
| 2836 { | |
| 2837 if (curwin->w_cursor.lnum <= (linenr_T)n) | |
| 2838 curwin->w_cursor.lnum = 1; | |
| 2839 else | |
| 2840 # ifdef FEAT_FOLDING | |
| 2841 if (hasAnyFolding(curwin)) | |
| 2842 { | |
| 2843 while (--n >= 0 && curwin->w_cursor.lnum > 1) | |
| 2844 { | |
| 2845 --curwin->w_cursor.lnum; | |
| 2846 (void)hasFolding(curwin->w_cursor.lnum, | |
| 2847 &curwin->w_cursor.lnum, NULL); | |
| 2848 } | |
| 2849 } | |
| 2850 else | |
| 2851 # endif | |
| 2852 curwin->w_cursor.lnum -= n; | |
| 2853 } | |
| 2854 #else | |
| 2855 /* try to put the cursor in the same screen line */ | |
| 2856 scrolled += n; /* move cursor when topline is 1 */ | |
| 2857 while (curwin->w_cursor.lnum > curwin->w_topline | |
| 2858 && (scrolled > 0 || curwin->w_cursor.lnum >= curwin->w_botline)) | |
| 2859 { | |
| 2860 scrolled -= plines(curwin->w_cursor.lnum - 1); | |
| 2861 if (scrolled < 0 && curwin->w_cursor.lnum < curwin->w_botline) | |
| 2862 break; | |
| 2863 --curwin->w_cursor.lnum; | |
| 2864 # ifdef FEAT_FOLDING | |
| 2865 foldAdjustCursor(); | |
| 2866 # endif | |
| 2867 } | |
| 2868 #endif | |
| 2869 } | |
| 2870 # ifdef FEAT_FOLDING | |
| 2871 /* Move cursor to first line of closed fold. */ | |
| 2872 foldAdjustCursor(); | |
| 2873 # endif | |
| 2874 #ifdef FEAT_DIFF | |
| 2875 check_topfill(curwin, !flag); | |
| 2876 #endif | |
| 2877 cursor_correct(); | |
| 2878 beginline(BL_SOL | BL_FIX); | |
| 2879 redraw_later(VALID); | |
| 2880 } |