|
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
|
|
|
699 * of wp->w_topine.
|
|
|
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;
|
|
|
892
|
|
|
893 validate_virtcol();
|
|
|
894 if (!(curwin->w_valid & VALID_WCOL))
|
|
|
895 {
|
|
|
896 col = curwin->w_virtcol;
|
|
|
897 off = curwin_col_off();
|
|
|
898 col += off;
|
|
|
899
|
|
|
900 /* long line wrapping, adjust curwin->w_wrow */
|
|
1668
|
901 if (curwin->w_p_wrap
|
|
|
902 && col >= (colnr_T)W_WIDTH(curwin)
|
|
119
|
903 && W_WIDTH(curwin) - off + curwin_col_off2() > 0)
|
|
7
|
904 {
|
|
|
905 col -= W_WIDTH(curwin);
|
|
|
906 col = col % (W_WIDTH(curwin) - off + curwin_col_off2());
|
|
|
907 }
|
|
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 {
|
|
|
1044 n = (curwin->w_wcol - W_WIDTH(curwin)) / width + 1;
|
|
|
1045 curwin->w_wcol -= n * width;
|
|
|
1046 curwin->w_wrow += n;
|
|
|
1047
|
|
|
1048 #ifdef FEAT_LINEBREAK
|
|
|
1049 /* When cursor wraps to first char of next line in Insert
|
|
|
1050 * mode, the 'showbreak' string isn't shown, backup to first
|
|
|
1051 * column */
|
|
|
1052 if (*p_sbr && *ml_get_cursor() == NUL
|
|
|
1053 && curwin->w_wcol == (int)vim_strsize(p_sbr))
|
|
|
1054 curwin->w_wcol = 0;
|
|
|
1055 #endif
|
|
|
1056 }
|
|
|
1057 }
|
|
|
1058
|
|
|
1059 /* No line wrapping: compute curwin->w_leftcol if scrolling is on and line
|
|
|
1060 * is not folded.
|
|
|
1061 * If scrolling is off, curwin->w_leftcol is assumed to be 0 */
|
|
|
1062 else if (scroll
|
|
|
1063 #ifdef FEAT_FOLDING
|
|
|
1064 && !curwin->w_cline_folded
|
|
|
1065 #endif
|
|
|
1066 )
|
|
|
1067 {
|
|
|
1068 /*
|
|
|
1069 * If Cursor is left of the screen, scroll rightwards.
|
|
|
1070 * If Cursor is right of the screen, scroll leftwards
|
|
|
1071 * If we get closer to the edge than 'sidescrolloff', scroll a little
|
|
|
1072 * extra
|
|
|
1073 */
|
|
|
1074 off_left = (int)startcol - (int)curwin->w_leftcol - p_siso;
|
|
|
1075 off_right = (int)endcol - (int)(curwin->w_leftcol + W_WIDTH(curwin)
|
|
|
1076 - p_siso) + 1;
|
|
|
1077 if (off_left < 0 || off_right > 0)
|
|
|
1078 {
|
|
|
1079 if (off_left < 0)
|
|
|
1080 diff = -off_left;
|
|
|
1081 else
|
|
|
1082 diff = off_right;
|
|
|
1083
|
|
|
1084 /* When far off or not enough room on either side, put cursor in
|
|
|
1085 * middle of window. */
|
|
|
1086 if (p_ss == 0 || diff >= textwidth / 2 || off_right >= off_left)
|
|
|
1087 new_leftcol = curwin->w_wcol - extra - textwidth / 2;
|
|
|
1088 else
|
|
|
1089 {
|
|
|
1090 if (diff < p_ss)
|
|
|
1091 diff = p_ss;
|
|
|
1092 if (off_left < 0)
|
|
|
1093 new_leftcol = curwin->w_leftcol - diff;
|
|
|
1094 else
|
|
|
1095 new_leftcol = curwin->w_leftcol + diff;
|
|
|
1096 }
|
|
|
1097 if (new_leftcol < 0)
|
|
|
1098 new_leftcol = 0;
|
|
|
1099 if (new_leftcol != (int)curwin->w_leftcol)
|
|
|
1100 {
|
|
|
1101 curwin->w_leftcol = new_leftcol;
|
|
|
1102 /* screen has to be redrawn with new curwin->w_leftcol */
|
|
|
1103 redraw_later(NOT_VALID);
|
|
|
1104 }
|
|
|
1105 }
|
|
|
1106 curwin->w_wcol -= curwin->w_leftcol;
|
|
|
1107 }
|
|
|
1108 else if (curwin->w_wcol > (int)curwin->w_leftcol)
|
|
|
1109 curwin->w_wcol -= curwin->w_leftcol;
|
|
|
1110 else
|
|
|
1111 curwin->w_wcol = 0;
|
|
|
1112
|
|
|
1113 #ifdef FEAT_DIFF
|
|
|
1114 /* Skip over filler lines. At the top use w_topfill, there
|
|
|
1115 * may be some filler lines above the window. */
|
|
|
1116 if (curwin->w_cursor.lnum == curwin->w_topline)
|
|
|
1117 curwin->w_wrow += curwin->w_topfill;
|
|
|
1118 else
|
|
|
1119 curwin->w_wrow += diff_check_fill(curwin, curwin->w_cursor.lnum);
|
|
|
1120 #endif
|
|
|
1121
|
|
|
1122 prev_skipcol = curwin->w_skipcol;
|
|
|
1123
|
|
|
1124 p_lines = 0;
|
|
|
1125 if ((curwin->w_wrow >= curwin->w_height
|
|
|
1126 || ((prev_skipcol > 0
|
|
|
1127 || curwin->w_wrow + p_so >= curwin->w_height)
|
|
|
1128 && (p_lines =
|
|
|
1129 #ifdef FEAT_DIFF
|
|
|
1130 plines_win_nofill
|
|
|
1131 #else
|
|
|
1132 plines_win
|
|
|
1133 #endif
|
|
|
1134 (curwin, curwin->w_cursor.lnum, FALSE))
|
|
|
1135 - 1 >= curwin->w_height))
|
|
|
1136 && curwin->w_height != 0
|
|
|
1137 && curwin->w_cursor.lnum == curwin->w_topline
|
|
|
1138 && width > 0
|
|
|
1139 #ifdef FEAT_VERTSPLIT
|
|
|
1140 && curwin->w_width != 0
|
|
|
1141 #endif
|
|
|
1142 )
|
|
|
1143 {
|
|
|
1144 /* Cursor past end of screen. Happens with a single line that does
|
|
|
1145 * not fit on screen. Find a skipcol to show the text around the
|
|
|
1146 * cursor. Avoid scrolling all the time. compute value of "extra":
|
|
|
1147 * 1: Less than "p_so" lines above
|
|
|
1148 * 2: Less than "p_so" lines below
|
|
|
1149 * 3: both of them */
|
|
|
1150 extra = 0;
|
|
|
1151 if (curwin->w_skipcol + p_so * width > curwin->w_virtcol)
|
|
|
1152 extra = 1;
|
|
|
1153 /* Compute last display line of the buffer line that we want at the
|
|
|
1154 * bottom of the window. */
|
|
|
1155 if (p_lines == 0)
|
|
|
1156 p_lines = plines_win(curwin, curwin->w_cursor.lnum, FALSE);
|
|
|
1157 --p_lines;
|
|
|
1158 if (p_lines > curwin->w_wrow + p_so)
|
|
|
1159 n = curwin->w_wrow + p_so;
|
|
|
1160 else
|
|
|
1161 n = p_lines;
|
|
|
1162 if ((colnr_T)n >= curwin->w_height + curwin->w_skipcol / width)
|
|
|
1163 extra += 2;
|
|
|
1164
|
|
|
1165 if (extra == 3 || p_lines < p_so * 2)
|
|
|
1166 {
|
|
|
1167 /* not enough room for 'scrolloff', put cursor in the middle */
|
|
|
1168 n = curwin->w_virtcol / width;
|
|
|
1169 if (n > curwin->w_height / 2)
|
|
|
1170 n -= curwin->w_height / 2;
|
|
|
1171 else
|
|
|
1172 n = 0;
|
|
|
1173 /* don't skip more than necessary */
|
|
|
1174 if (n > p_lines - curwin->w_height + 1)
|
|
|
1175 n = p_lines - curwin->w_height + 1;
|
|
|
1176 curwin->w_skipcol = n * width;
|
|
|
1177 }
|
|
|
1178 else if (extra == 1)
|
|
|
1179 {
|
|
|
1180 /* less then 'scrolloff' lines above, decrease skipcol */
|
|
|
1181 extra = (curwin->w_skipcol + p_so * width - curwin->w_virtcol
|
|
|
1182 + width - 1) / width;
|
|
|
1183 if (extra > 0)
|
|
|
1184 {
|
|
|
1185 if ((colnr_T)(extra * width) > curwin->w_skipcol)
|
|
|
1186 extra = curwin->w_skipcol / width;
|
|
|
1187 curwin->w_skipcol -= extra * width;
|
|
|
1188 }
|
|
|
1189 }
|
|
|
1190 else if (extra == 2)
|
|
|
1191 {
|
|
|
1192 /* less then 'scrolloff' lines below, increase skipcol */
|
|
|
1193 endcol = (n - curwin->w_height + 1) * width;
|
|
|
1194 while (endcol > curwin->w_virtcol)
|
|
|
1195 endcol -= width;
|
|
|
1196 if (endcol > curwin->w_skipcol)
|
|
|
1197 curwin->w_skipcol = endcol;
|
|
|
1198 }
|
|
|
1199
|
|
|
1200 curwin->w_wrow -= curwin->w_skipcol / width;
|
|
|
1201 if (curwin->w_wrow >= curwin->w_height)
|
|
|
1202 {
|
|
|
1203 /* small window, make sure cursor is in it */
|
|
|
1204 extra = curwin->w_wrow - curwin->w_height + 1;
|
|
|
1205 curwin->w_skipcol += extra * width;
|
|
|
1206 curwin->w_wrow -= extra;
|
|
|
1207 }
|
|
|
1208
|
|
|
1209 extra = ((int)prev_skipcol - (int)curwin->w_skipcol) / width;
|
|
|
1210 if (extra > 0)
|
|
|
1211 win_ins_lines(curwin, 0, extra, FALSE, FALSE);
|
|
|
1212 else if (extra < 0)
|
|
|
1213 win_del_lines(curwin, 0, -extra, FALSE, FALSE);
|
|
|
1214 }
|
|
|
1215 else
|
|
|
1216 curwin->w_skipcol = 0;
|
|
|
1217 if (prev_skipcol != curwin->w_skipcol)
|
|
|
1218 redraw_later(NOT_VALID);
|
|
|
1219
|
|
740
|
1220 #ifdef FEAT_SYN_HL
|
|
|
1221 /* Redraw when w_virtcol changes and 'cursorcolumn' is set, or when w_row
|
|
|
1222 * changes and 'cursorline' is set. */
|
|
752
|
1223 if (((curwin->w_p_cuc && (curwin->w_valid & VALID_VIRTCOL) == 0)
|
|
|
1224 || (curwin->w_p_cul && (curwin->w_valid & VALID_WROW) == 0))
|
|
|
1225 # ifdef FEAT_INS_EXPAND
|
|
|
1226 && !pum_visible()
|
|
|
1227 # endif
|
|
|
1228 )
|
|
740
|
1229 redraw_later(SOME_VALID);
|
|
|
1230 #endif
|
|
|
1231
|
|
7
|
1232 curwin->w_valid |= VALID_WCOL|VALID_WROW|VALID_VIRTCOL;
|
|
|
1233 }
|
|
|
1234
|
|
|
1235 /*
|
|
|
1236 * Scroll the current window down by "line_count" logical lines. "CTRL-Y"
|
|
|
1237 */
|
|
|
1238 void
|
|
|
1239 scrolldown(line_count, byfold)
|
|
|
1240 long line_count;
|
|
1877
|
1241 int byfold UNUSED; /* TRUE: count a closed fold as one line */
|
|
7
|
1242 {
|
|
|
1243 long done = 0; /* total # of physical lines done */
|
|
|
1244 int wrow;
|
|
|
1245 int moved = FALSE;
|
|
|
1246
|
|
|
1247 #ifdef FEAT_FOLDING
|
|
|
1248 linenr_T first;
|
|
|
1249
|
|
|
1250 /* Make sure w_topline is at the first of a sequence of folded lines. */
|
|
|
1251 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
1252 #endif
|
|
|
1253 validate_cursor(); /* w_wrow needs to be valid */
|
|
|
1254 while (line_count-- > 0)
|
|
|
1255 {
|
|
|
1256 #ifdef FEAT_DIFF
|
|
1980
|
1257 if (curwin->w_topfill < diff_check(curwin, curwin->w_topline)
|
|
|
1258 && curwin->w_topfill < curwin->w_height - 1)
|
|
7
|
1259 {
|
|
|
1260 ++curwin->w_topfill;
|
|
|
1261 ++done;
|
|
|
1262 }
|
|
|
1263 else
|
|
|
1264 #endif
|
|
|
1265 {
|
|
|
1266 if (curwin->w_topline == 1)
|
|
|
1267 break;
|
|
|
1268 --curwin->w_topline;
|
|
|
1269 #ifdef FEAT_DIFF
|
|
|
1270 curwin->w_topfill = 0;
|
|
|
1271 #endif
|
|
|
1272 #ifdef FEAT_FOLDING
|
|
|
1273 /* A sequence of folded lines only counts for one logical line */
|
|
|
1274 if (hasFolding(curwin->w_topline, &first, NULL))
|
|
|
1275 {
|
|
|
1276 ++done;
|
|
|
1277 if (!byfold)
|
|
|
1278 line_count -= curwin->w_topline - first - 1;
|
|
|
1279 curwin->w_botline -= curwin->w_topline - first;
|
|
|
1280 curwin->w_topline = first;
|
|
|
1281 }
|
|
|
1282 else
|
|
|
1283 #endif
|
|
|
1284 #ifdef FEAT_DIFF
|
|
|
1285 done += plines_nofill(curwin->w_topline);
|
|
|
1286 #else
|
|
|
1287 done += plines(curwin->w_topline);
|
|
|
1288 #endif
|
|
|
1289 }
|
|
|
1290 --curwin->w_botline; /* approximate w_botline */
|
|
|
1291 invalidate_botline();
|
|
|
1292 }
|
|
|
1293 curwin->w_wrow += done; /* keep w_wrow updated */
|
|
|
1294 curwin->w_cline_row += done; /* keep w_cline_row updated */
|
|
|
1295
|
|
|
1296 #ifdef FEAT_DIFF
|
|
|
1297 if (curwin->w_cursor.lnum == curwin->w_topline)
|
|
|
1298 curwin->w_cline_row = 0;
|
|
|
1299 check_topfill(curwin, TRUE);
|
|
|
1300 #endif
|
|
|
1301
|
|
|
1302 /*
|
|
|
1303 * Compute the row number of the last row of the cursor line
|
|
|
1304 * and move the cursor onto the displayed part of the window.
|
|
|
1305 */
|
|
|
1306 wrow = curwin->w_wrow;
|
|
|
1307 if (curwin->w_p_wrap
|
|
|
1308 #ifdef FEAT_VERTSPLIT
|
|
|
1309 && curwin->w_width != 0
|
|
|
1310 #endif
|
|
|
1311 )
|
|
|
1312 {
|
|
|
1313 validate_virtcol();
|
|
|
1314 validate_cheight();
|
|
|
1315 wrow += curwin->w_cline_height - 1 -
|
|
|
1316 curwin->w_virtcol / W_WIDTH(curwin);
|
|
|
1317 }
|
|
|
1318 while (wrow >= curwin->w_height && curwin->w_cursor.lnum > 1)
|
|
|
1319 {
|
|
|
1320 #ifdef FEAT_FOLDING
|
|
|
1321 if (hasFolding(curwin->w_cursor.lnum, &first, NULL))
|
|
|
1322 {
|
|
|
1323 --wrow;
|
|
|
1324 if (first == 1)
|
|
|
1325 curwin->w_cursor.lnum = 1;
|
|
|
1326 else
|
|
|
1327 curwin->w_cursor.lnum = first - 1;
|
|
|
1328 }
|
|
|
1329 else
|
|
|
1330 #endif
|
|
|
1331 wrow -= plines(curwin->w_cursor.lnum--);
|
|
|
1332 curwin->w_valid &=
|
|
|
1333 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL);
|
|
|
1334 moved = TRUE;
|
|
|
1335 }
|
|
|
1336 if (moved)
|
|
|
1337 {
|
|
|
1338 #ifdef FEAT_FOLDING
|
|
|
1339 /* Move cursor to first line of closed fold. */
|
|
|
1340 foldAdjustCursor();
|
|
|
1341 #endif
|
|
|
1342 coladvance(curwin->w_curswant);
|
|
|
1343 }
|
|
|
1344 }
|
|
|
1345
|
|
|
1346 /*
|
|
|
1347 * Scroll the current window up by "line_count" logical lines. "CTRL-E"
|
|
|
1348 */
|
|
|
1349 void
|
|
|
1350 scrollup(line_count, byfold)
|
|
|
1351 long line_count;
|
|
1877
|
1352 int byfold UNUSED; /* TRUE: count a closed fold as one line */
|
|
7
|
1353 {
|
|
|
1354 #if defined(FEAT_FOLDING) || defined(FEAT_DIFF)
|
|
|
1355 linenr_T lnum;
|
|
|
1356
|
|
|
1357 if (
|
|
|
1358 # ifdef FEAT_FOLDING
|
|
|
1359 (byfold && hasAnyFolding(curwin))
|
|
|
1360 # ifdef FEAT_DIFF
|
|
|
1361 ||
|
|
|
1362 # endif
|
|
|
1363 # endif
|
|
|
1364 # ifdef FEAT_DIFF
|
|
|
1365 curwin->w_p_diff
|
|
|
1366 # endif
|
|
|
1367 )
|
|
|
1368 {
|
|
|
1369 /* count each sequence of folded lines as one logical line */
|
|
|
1370 lnum = curwin->w_topline;
|
|
|
1371 while (line_count--)
|
|
|
1372 {
|
|
|
1373 # ifdef FEAT_DIFF
|
|
|
1374 if (curwin->w_topfill > 0)
|
|
|
1375 --curwin->w_topfill;
|
|
|
1376 else
|
|
|
1377 # endif
|
|
|
1378 {
|
|
|
1379 # ifdef FEAT_FOLDING
|
|
|
1380 if (byfold)
|
|
|
1381 (void)hasFolding(lnum, NULL, &lnum);
|
|
|
1382 # endif
|
|
|
1383 if (lnum >= curbuf->b_ml.ml_line_count)
|
|
|
1384 break;
|
|
|
1385 ++lnum;
|
|
|
1386 # ifdef FEAT_DIFF
|
|
|
1387 curwin->w_topfill = diff_check_fill(curwin, lnum);
|
|
|
1388 # endif
|
|
|
1389 }
|
|
|
1390 }
|
|
|
1391 /* approximate w_botline */
|
|
|
1392 curwin->w_botline += lnum - curwin->w_topline;
|
|
|
1393 curwin->w_topline = lnum;
|
|
|
1394 }
|
|
|
1395 else
|
|
|
1396 #endif
|
|
|
1397 {
|
|
|
1398 curwin->w_topline += line_count;
|
|
|
1399 curwin->w_botline += line_count; /* approximate w_botline */
|
|
|
1400 }
|
|
|
1401
|
|
|
1402 if (curwin->w_topline > curbuf->b_ml.ml_line_count)
|
|
|
1403 curwin->w_topline = curbuf->b_ml.ml_line_count;
|
|
|
1404 if (curwin->w_botline > curbuf->b_ml.ml_line_count + 1)
|
|
|
1405 curwin->w_botline = curbuf->b_ml.ml_line_count + 1;
|
|
|
1406
|
|
|
1407 #ifdef FEAT_DIFF
|
|
|
1408 check_topfill(curwin, FALSE);
|
|
|
1409 #endif
|
|
|
1410
|
|
|
1411 #ifdef FEAT_FOLDING
|
|
|
1412 if (hasAnyFolding(curwin))
|
|
|
1413 /* Make sure w_topline is at the first of a sequence of folded lines. */
|
|
|
1414 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
1415 #endif
|
|
|
1416
|
|
|
1417 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
1418 if (curwin->w_cursor.lnum < curwin->w_topline)
|
|
|
1419 {
|
|
|
1420 curwin->w_cursor.lnum = curwin->w_topline;
|
|
|
1421 curwin->w_valid &=
|
|
|
1422 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL);
|
|
|
1423 coladvance(curwin->w_curswant);
|
|
|
1424 }
|
|
|
1425 }
|
|
|
1426
|
|
|
1427 #ifdef FEAT_DIFF
|
|
|
1428 /*
|
|
|
1429 * Don't end up with too many filler lines in the window.
|
|
|
1430 */
|
|
|
1431 void
|
|
|
1432 check_topfill(wp, down)
|
|
|
1433 win_T *wp;
|
|
|
1434 int down; /* when TRUE scroll down when not enough space */
|
|
|
1435 {
|
|
|
1436 int n;
|
|
|
1437
|
|
|
1438 if (wp->w_topfill > 0)
|
|
|
1439 {
|
|
|
1440 n = plines_win_nofill(wp, wp->w_topline, TRUE);
|
|
|
1441 if (wp->w_topfill + n > wp->w_height)
|
|
|
1442 {
|
|
|
1443 if (down && wp->w_topline > 1)
|
|
|
1444 {
|
|
|
1445 --wp->w_topline;
|
|
|
1446 wp->w_topfill = 0;
|
|
|
1447 }
|
|
|
1448 else
|
|
|
1449 {
|
|
|
1450 wp->w_topfill = wp->w_height - n;
|
|
|
1451 if (wp->w_topfill < 0)
|
|
|
1452 wp->w_topfill = 0;
|
|
|
1453 }
|
|
|
1454 }
|
|
|
1455 }
|
|
|
1456 }
|
|
|
1457
|
|
|
1458 /*
|
|
|
1459 * Use as many filler lines as possible for w_topline. Make sure w_topline
|
|
|
1460 * is still visible.
|
|
|
1461 */
|
|
|
1462 static void
|
|
|
1463 max_topfill()
|
|
|
1464 {
|
|
|
1465 int n;
|
|
|
1466
|
|
|
1467 n = plines_nofill(curwin->w_topline);
|
|
|
1468 if (n >= curwin->w_height)
|
|
|
1469 curwin->w_topfill = 0;
|
|
|
1470 else
|
|
|
1471 {
|
|
|
1472 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline);
|
|
|
1473 if (curwin->w_topfill + n > curwin->w_height)
|
|
|
1474 curwin->w_topfill = curwin->w_height - n;
|
|
|
1475 }
|
|
|
1476 }
|
|
|
1477 #endif
|
|
|
1478
|
|
|
1479 #if defined(FEAT_INS_EXPAND) || defined(PROTO)
|
|
|
1480 /*
|
|
|
1481 * Scroll the screen one line down, but don't do it if it would move the
|
|
|
1482 * cursor off the screen.
|
|
|
1483 */
|
|
|
1484 void
|
|
|
1485 scrolldown_clamp()
|
|
|
1486 {
|
|
|
1487 int end_row;
|
|
|
1488 #ifdef FEAT_DIFF
|
|
|
1489 int can_fill = (curwin->w_topfill
|
|
|
1490 < diff_check_fill(curwin, curwin->w_topline));
|
|
|
1491 #endif
|
|
|
1492
|
|
|
1493 if (curwin->w_topline <= 1
|
|
|
1494 #ifdef FEAT_DIFF
|
|
|
1495 && !can_fill
|
|
|
1496 #endif
|
|
|
1497 )
|
|
|
1498 return;
|
|
|
1499
|
|
|
1500 validate_cursor(); /* w_wrow needs to be valid */
|
|
|
1501
|
|
|
1502 /*
|
|
|
1503 * Compute the row number of the last row of the cursor line
|
|
|
1504 * and make sure it doesn't go off the screen. Make sure the cursor
|
|
|
1505 * doesn't go past 'scrolloff' lines from the screen end.
|
|
|
1506 */
|
|
|
1507 end_row = curwin->w_wrow;
|
|
|
1508 #ifdef FEAT_DIFF
|
|
|
1509 if (can_fill)
|
|
|
1510 ++end_row;
|
|
|
1511 else
|
|
|
1512 end_row += plines_nofill(curwin->w_topline - 1);
|
|
|
1513 #else
|
|
|
1514 end_row += plines(curwin->w_topline - 1);
|
|
|
1515 #endif
|
|
|
1516 if (curwin->w_p_wrap
|
|
|
1517 #ifdef FEAT_VERTSPLIT
|
|
|
1518 && curwin->w_width != 0
|
|
|
1519 #endif
|
|
|
1520 )
|
|
|
1521 {
|
|
|
1522 validate_cheight();
|
|
|
1523 validate_virtcol();
|
|
|
1524 end_row += curwin->w_cline_height - 1 -
|
|
|
1525 curwin->w_virtcol / W_WIDTH(curwin);
|
|
|
1526 }
|
|
|
1527 if (end_row < curwin->w_height - p_so)
|
|
|
1528 {
|
|
|
1529 #ifdef FEAT_DIFF
|
|
|
1530 if (can_fill)
|
|
|
1531 {
|
|
|
1532 ++curwin->w_topfill;
|
|
|
1533 check_topfill(curwin, TRUE);
|
|
|
1534 }
|
|
|
1535 else
|
|
|
1536 {
|
|
|
1537 --curwin->w_topline;
|
|
|
1538 curwin->w_topfill = 0;
|
|
|
1539 }
|
|
|
1540 #else
|
|
|
1541 --curwin->w_topline;
|
|
|
1542 #endif
|
|
|
1543 #ifdef FEAT_FOLDING
|
|
|
1544 hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
1545 #endif
|
|
|
1546 --curwin->w_botline; /* approximate w_botline */
|
|
|
1547 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
1548 }
|
|
|
1549 }
|
|
|
1550
|
|
|
1551 /*
|
|
|
1552 * Scroll the screen one line up, but don't do it if it would move the cursor
|
|
|
1553 * off the screen.
|
|
|
1554 */
|
|
|
1555 void
|
|
|
1556 scrollup_clamp()
|
|
|
1557 {
|
|
|
1558 int start_row;
|
|
|
1559
|
|
|
1560 if (curwin->w_topline == curbuf->b_ml.ml_line_count
|
|
|
1561 #ifdef FEAT_DIFF
|
|
|
1562 && curwin->w_topfill == 0
|
|
|
1563 #endif
|
|
|
1564 )
|
|
|
1565 return;
|
|
|
1566
|
|
|
1567 validate_cursor(); /* w_wrow needs to be valid */
|
|
|
1568
|
|
|
1569 /*
|
|
|
1570 * Compute the row number of the first row of the cursor line
|
|
|
1571 * and make sure it doesn't go off the screen. Make sure the cursor
|
|
|
1572 * doesn't go before 'scrolloff' lines from the screen start.
|
|
|
1573 */
|
|
|
1574 #ifdef FEAT_DIFF
|
|
|
1575 start_row = curwin->w_wrow - plines_nofill(curwin->w_topline)
|
|
|
1576 - curwin->w_topfill;
|
|
|
1577 #else
|
|
|
1578 start_row = curwin->w_wrow - plines(curwin->w_topline);
|
|
|
1579 #endif
|
|
|
1580 if (curwin->w_p_wrap
|
|
|
1581 #ifdef FEAT_VERTSPLIT
|
|
|
1582 && curwin->w_width != 0
|
|
|
1583 #endif
|
|
|
1584 )
|
|
|
1585 {
|
|
|
1586 validate_virtcol();
|
|
|
1587 start_row -= curwin->w_virtcol / W_WIDTH(curwin);
|
|
|
1588 }
|
|
|
1589 if (start_row >= p_so)
|
|
|
1590 {
|
|
|
1591 #ifdef FEAT_DIFF
|
|
|
1592 if (curwin->w_topfill > 0)
|
|
|
1593 --curwin->w_topfill;
|
|
|
1594 else
|
|
|
1595 #endif
|
|
36
|
1596 {
|
|
|
1597 #ifdef FEAT_FOLDING
|
|
|
1598 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline);
|
|
|
1599 #endif
|
|
7
|
1600 ++curwin->w_topline;
|
|
36
|
1601 }
|
|
7
|
1602 ++curwin->w_botline; /* approximate w_botline */
|
|
|
1603 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
1604 }
|
|
|
1605 }
|
|
|
1606 #endif /* FEAT_INS_EXPAND */
|
|
|
1607
|
|
|
1608 /*
|
|
|
1609 * Add one line above "lp->lnum". This can be a filler line, a closed fold or
|
|
|
1610 * a (wrapped) text line. Uses and sets "lp->fill".
|
|
|
1611 * Returns the height of the added line in "lp->height".
|
|
|
1612 * Lines above the first one are incredibly high.
|
|
|
1613 */
|
|
|
1614 static void
|
|
|
1615 topline_back(lp)
|
|
|
1616 lineoff_T *lp;
|
|
|
1617 {
|
|
|
1618 #ifdef FEAT_DIFF
|
|
|
1619 if (lp->fill < diff_check_fill(curwin, lp->lnum))
|
|
|
1620 {
|
|
|
1621 /* Add a filler line. */
|
|
|
1622 ++lp->fill;
|
|
|
1623 lp->height = 1;
|
|
|
1624 }
|
|
|
1625 else
|
|
|
1626 #endif
|
|
|
1627 {
|
|
|
1628 --lp->lnum;
|
|
|
1629 #ifdef FEAT_DIFF
|
|
|
1630 lp->fill = 0;
|
|
|
1631 #endif
|
|
|
1632 if (lp->lnum < 1)
|
|
|
1633 lp->height = MAXCOL;
|
|
|
1634 else
|
|
|
1635 #ifdef FEAT_FOLDING
|
|
|
1636 if (hasFolding(lp->lnum, &lp->lnum, NULL))
|
|
|
1637 /* Add a closed fold */
|
|
|
1638 lp->height = 1;
|
|
|
1639 else
|
|
|
1640 #endif
|
|
|
1641 {
|
|
|
1642 #ifdef FEAT_DIFF
|
|
|
1643 lp->height = plines_nofill(lp->lnum);
|
|
|
1644 #else
|
|
|
1645 lp->height = plines(lp->lnum);
|
|
|
1646 #endif
|
|
|
1647 }
|
|
|
1648 }
|
|
|
1649 }
|
|
|
1650
|
|
|
1651 /*
|
|
|
1652 * Add one line below "lp->lnum". This can be a filler line, a closed fold or
|
|
|
1653 * a (wrapped) text line. Uses and sets "lp->fill".
|
|
|
1654 * Returns the height of the added line in "lp->height".
|
|
|
1655 * Lines below the last one are incredibly high.
|
|
|
1656 */
|
|
|
1657 static void
|
|
|
1658 botline_forw(lp)
|
|
|
1659 lineoff_T *lp;
|
|
|
1660 {
|
|
|
1661 #ifdef FEAT_DIFF
|
|
|
1662 if (lp->fill < diff_check_fill(curwin, lp->lnum + 1))
|
|
|
1663 {
|
|
|
1664 /* Add a filler line. */
|
|
|
1665 ++lp->fill;
|
|
|
1666 lp->height = 1;
|
|
|
1667 }
|
|
|
1668 else
|
|
|
1669 #endif
|
|
|
1670 {
|
|
|
1671 ++lp->lnum;
|
|
|
1672 #ifdef FEAT_DIFF
|
|
|
1673 lp->fill = 0;
|
|
|
1674 #endif
|
|
|
1675 if (lp->lnum > curbuf->b_ml.ml_line_count)
|
|
|
1676 lp->height = MAXCOL;
|
|
|
1677 else
|
|
|
1678 #ifdef FEAT_FOLDING
|
|
|
1679 if (hasFolding(lp->lnum, NULL, &lp->lnum))
|
|
|
1680 /* Add a closed fold */
|
|
|
1681 lp->height = 1;
|
|
|
1682 else
|
|
|
1683 #endif
|
|
|
1684 {
|
|
|
1685 #ifdef FEAT_DIFF
|
|
|
1686 lp->height = plines_nofill(lp->lnum);
|
|
|
1687 #else
|
|
|
1688 lp->height = plines(lp->lnum);
|
|
|
1689 #endif
|
|
|
1690 }
|
|
|
1691 }
|
|
|
1692 }
|
|
|
1693
|
|
|
1694 #ifdef FEAT_DIFF
|
|
|
1695 /*
|
|
|
1696 * Switch from including filler lines below lp->lnum to including filler
|
|
|
1697 * lines above loff.lnum + 1. This keeps pointing to the same line.
|
|
|
1698 * When there are no filler lines nothing changes.
|
|
|
1699 */
|
|
|
1700 static void
|
|
|
1701 botline_topline(lp)
|
|
|
1702 lineoff_T *lp;
|
|
|
1703 {
|
|
|
1704 if (lp->fill > 0)
|
|
|
1705 {
|
|
|
1706 ++lp->lnum;
|
|
|
1707 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1;
|
|
|
1708 }
|
|
|
1709 }
|
|
|
1710
|
|
|
1711 /*
|
|
|
1712 * Switch from including filler lines above lp->lnum to including filler
|
|
|
1713 * lines below loff.lnum - 1. This keeps pointing to the same line.
|
|
|
1714 * When there are no filler lines nothing changes.
|
|
|
1715 */
|
|
|
1716 static void
|
|
|
1717 topline_botline(lp)
|
|
|
1718 lineoff_T *lp;
|
|
|
1719 {
|
|
|
1720 if (lp->fill > 0)
|
|
|
1721 {
|
|
|
1722 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1;
|
|
|
1723 --lp->lnum;
|
|
|
1724 }
|
|
|
1725 }
|
|
|
1726 #endif
|
|
|
1727
|
|
|
1728 /*
|
|
|
1729 * Recompute topline to put the cursor at the top of the window.
|
|
|
1730 * Scroll at least "min_scroll" lines.
|
|
|
1731 * If "always" is TRUE, always set topline (for "zt").
|
|
|
1732 */
|
|
|
1733 void
|
|
|
1734 scroll_cursor_top(min_scroll, always)
|
|
|
1735 int min_scroll;
|
|
|
1736 int always;
|
|
|
1737 {
|
|
|
1738 int scrolled = 0;
|
|
|
1739 int extra = 0;
|
|
|
1740 int used;
|
|
|
1741 int i;
|
|
|
1742 linenr_T top; /* just above displayed lines */
|
|
|
1743 linenr_T bot; /* just below displayed lines */
|
|
|
1744 linenr_T old_topline = curwin->w_topline;
|
|
|
1745 #ifdef FEAT_DIFF
|
|
|
1746 linenr_T old_topfill = curwin->w_topfill;
|
|
|
1747 #endif
|
|
|
1748 linenr_T new_topline;
|
|
|
1749 int off = p_so;
|
|
|
1750
|
|
|
1751 #ifdef FEAT_MOUSE
|
|
|
1752 if (mouse_dragging > 0)
|
|
|
1753 off = mouse_dragging - 1;
|
|
|
1754 #endif
|
|
|
1755
|
|
|
1756 /*
|
|
|
1757 * Decrease topline until:
|
|
|
1758 * - it has become 1
|
|
|
1759 * - (part of) the cursor line is moved off the screen or
|
|
|
1760 * - moved at least 'scrolljump' lines and
|
|
|
1761 * - at least 'scrolloff' lines above and below the cursor
|
|
|
1762 */
|
|
|
1763 validate_cheight();
|
|
|
1764 used = curwin->w_cline_height;
|
|
|
1765 if (curwin->w_cursor.lnum < curwin->w_topline)
|
|
|
1766 scrolled = used;
|
|
|
1767
|
|
|
1768 #ifdef FEAT_FOLDING
|
|
|
1769 if (hasFolding(curwin->w_cursor.lnum, &top, &bot))
|
|
|
1770 {
|
|
|
1771 --top;
|
|
|
1772 ++bot;
|
|
|
1773 }
|
|
|
1774 else
|
|
|
1775 #endif
|
|
|
1776 {
|
|
|
1777 top = curwin->w_cursor.lnum - 1;
|
|
|
1778 bot = curwin->w_cursor.lnum + 1;
|
|
|
1779 }
|
|
|
1780 new_topline = top + 1;
|
|
|
1781
|
|
|
1782 #ifdef FEAT_DIFF
|
|
|
1783 /* count filler lines of the cursor window as context */
|
|
|
1784 i = diff_check_fill(curwin, curwin->w_cursor.lnum);
|
|
|
1785 used += i;
|
|
|
1786 extra += i;
|
|
|
1787 #endif
|
|
|
1788
|
|
|
1789 /*
|
|
|
1790 * Check if the lines from "top" to "bot" fit in the window. If they do,
|
|
|
1791 * set new_topline and advance "top" and "bot" to include more lines.
|
|
|
1792 */
|
|
|
1793 while (top > 0)
|
|
|
1794 {
|
|
|
1795 #ifdef FEAT_FOLDING
|
|
|
1796 if (hasFolding(top, &top, NULL))
|
|
|
1797 /* count one logical line for a sequence of folded lines */
|
|
|
1798 i = 1;
|
|
|
1799 else
|
|
|
1800 #endif
|
|
|
1801 i = plines(top);
|
|
|
1802 used += i;
|
|
|
1803 if (extra + i <= off && bot < curbuf->b_ml.ml_line_count)
|
|
|
1804 {
|
|
|
1805 #ifdef FEAT_FOLDING
|
|
|
1806 if (hasFolding(bot, NULL, &bot))
|
|
|
1807 /* count one logical line for a sequence of folded lines */
|
|
|
1808 ++used;
|
|
|
1809 else
|
|
|
1810 #endif
|
|
|
1811 used += plines(bot);
|
|
|
1812 }
|
|
|
1813 if (used > curwin->w_height)
|
|
|
1814 break;
|
|
|
1815 if (top < curwin->w_topline)
|
|
|
1816 scrolled += i;
|
|
|
1817
|
|
|
1818 /*
|
|
|
1819 * If scrolling is needed, scroll at least 'sj' lines.
|
|
|
1820 */
|
|
|
1821 if ((new_topline >= curwin->w_topline || scrolled > min_scroll)
|
|
|
1822 && extra >= off)
|
|
|
1823 break;
|
|
|
1824
|
|
|
1825 extra += i;
|
|
|
1826 new_topline = top;
|
|
|
1827 --top;
|
|
|
1828 ++bot;
|
|
|
1829 }
|
|
|
1830
|
|
|
1831 /*
|
|
|
1832 * If we don't have enough space, put cursor in the middle.
|
|
|
1833 * This makes sure we get the same position when using "k" and "j"
|
|
|
1834 * in a small window.
|
|
|
1835 */
|
|
|
1836 if (used > curwin->w_height)
|
|
|
1837 scroll_cursor_halfway(FALSE);
|
|
|
1838 else
|
|
|
1839 {
|
|
|
1840 /*
|
|
|
1841 * If "always" is FALSE, only adjust topline to a lower value, higher
|
|
|
1842 * value may happen with wrapping lines
|
|
|
1843 */
|
|
|
1844 if (new_topline < curwin->w_topline || always)
|
|
|
1845 curwin->w_topline = new_topline;
|
|
|
1846 if (curwin->w_topline > curwin->w_cursor.lnum)
|
|
|
1847 curwin->w_topline = curwin->w_cursor.lnum;
|
|
|
1848 #ifdef FEAT_DIFF
|
|
|
1849 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline);
|
|
|
1850 if (curwin->w_topfill > 0 && extra > off)
|
|
|
1851 {
|
|
|
1852 curwin->w_topfill -= extra - off;
|
|
|
1853 if (curwin->w_topfill < 0)
|
|
|
1854 curwin->w_topfill = 0;
|
|
|
1855 }
|
|
|
1856 check_topfill(curwin, FALSE);
|
|
|
1857 #endif
|
|
|
1858 if (curwin->w_topline != old_topline
|
|
|
1859 #ifdef FEAT_DIFF
|
|
|
1860 || curwin->w_topfill != old_topfill
|
|
|
1861 #endif
|
|
|
1862 )
|
|
|
1863 curwin->w_valid &=
|
|
|
1864 ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
1865 curwin->w_valid |= VALID_TOPLINE;
|
|
|
1866 }
|
|
|
1867 }
|
|
|
1868
|
|
|
1869 /*
|
|
|
1870 * Set w_empty_rows and w_filler_rows for window "wp", having used up "used"
|
|
|
1871 * screen lines for text lines.
|
|
|
1872 */
|
|
|
1873 void
|
|
|
1874 set_empty_rows(wp, used)
|
|
|
1875 win_T *wp;
|
|
|
1876 int used;
|
|
|
1877 {
|
|
|
1878 #ifdef FEAT_DIFF
|
|
|
1879 wp->w_filler_rows = 0;
|
|
|
1880 #endif
|
|
|
1881 if (used == 0)
|
|
|
1882 wp->w_empty_rows = 0; /* single line that doesn't fit */
|
|
|
1883 else
|
|
|
1884 {
|
|
|
1885 wp->w_empty_rows = wp->w_height - used;
|
|
|
1886 #ifdef FEAT_DIFF
|
|
|
1887 if (wp->w_botline <= wp->w_buffer->b_ml.ml_line_count)
|
|
|
1888 {
|
|
|
1889 wp->w_filler_rows = diff_check_fill(wp, wp->w_botline);
|
|
|
1890 if (wp->w_empty_rows > wp->w_filler_rows)
|
|
|
1891 wp->w_empty_rows -= wp->w_filler_rows;
|
|
|
1892 else
|
|
|
1893 {
|
|
|
1894 wp->w_filler_rows = wp->w_empty_rows;
|
|
|
1895 wp->w_empty_rows = 0;
|
|
|
1896 }
|
|
|
1897 }
|
|
|
1898 #endif
|
|
|
1899 }
|
|
|
1900 }
|
|
|
1901
|
|
|
1902 /*
|
|
|
1903 * Recompute topline to put the cursor at the bottom of the window.
|
|
|
1904 * Scroll at least "min_scroll" lines.
|
|
|
1905 * If "set_topbot" is TRUE, set topline and botline first (for "zb").
|
|
|
1906 * This is messy stuff!!!
|
|
|
1907 */
|
|
|
1908 void
|
|
|
1909 scroll_cursor_bot(min_scroll, set_topbot)
|
|
|
1910 int min_scroll;
|
|
|
1911 int set_topbot;
|
|
|
1912 {
|
|
|
1913 int used;
|
|
|
1914 int scrolled = 0;
|
|
|
1915 int extra = 0;
|
|
|
1916 int i;
|
|
|
1917 linenr_T line_count;
|
|
|
1918 linenr_T old_topline = curwin->w_topline;
|
|
|
1919 lineoff_T loff;
|
|
|
1920 lineoff_T boff;
|
|
|
1921 #ifdef FEAT_DIFF
|
|
|
1922 int old_topfill = curwin->w_topfill;
|
|
|
1923 int fill_below_window;
|
|
|
1924 #endif
|
|
|
1925 linenr_T old_botline = curwin->w_botline;
|
|
|
1926 linenr_T old_valid = curwin->w_valid;
|
|
|
1927 int old_empty_rows = curwin->w_empty_rows;
|
|
|
1928 linenr_T cln; /* Cursor Line Number */
|
|
|
1929
|
|
|
1930 cln = curwin->w_cursor.lnum;
|
|
|
1931 if (set_topbot)
|
|
|
1932 {
|
|
|
1933 used = 0;
|
|
|
1934 curwin->w_botline = cln + 1;
|
|
|
1935 #ifdef FEAT_DIFF
|
|
|
1936 loff.fill = 0;
|
|
|
1937 #endif
|
|
|
1938 for (curwin->w_topline = curwin->w_botline;
|
|
|
1939 curwin->w_topline > 1;
|
|
|
1940 curwin->w_topline = loff.lnum)
|
|
|
1941 {
|
|
|
1942 loff.lnum = curwin->w_topline;
|
|
|
1943 topline_back(&loff);
|
|
|
1944 if (used + loff.height > curwin->w_height)
|
|
|
1945 break;
|
|
|
1946 used += loff.height;
|
|
|
1947 #ifdef FEAT_DIFF
|
|
|
1948 curwin->w_topfill = loff.fill;
|
|
|
1949 #endif
|
|
|
1950 }
|
|
|
1951 set_empty_rows(curwin, used);
|
|
|
1952 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP;
|
|
|
1953 if (curwin->w_topline != old_topline
|
|
|
1954 #ifdef FEAT_DIFF
|
|
|
1955 || curwin->w_topfill != old_topfill
|
|
|
1956 #endif
|
|
|
1957 )
|
|
|
1958 curwin->w_valid &= ~(VALID_WROW|VALID_CROW);
|
|
|
1959 }
|
|
|
1960 else
|
|
|
1961 validate_botline();
|
|
|
1962
|
|
|
1963 /* The lines of the cursor line itself are always used. */
|
|
|
1964 #ifdef FEAT_DIFF
|
|
|
1965 used = plines_nofill(cln);
|
|
|
1966 #else
|
|
|
1967 validate_cheight();
|
|
|
1968 used = curwin->w_cline_height;
|
|
|
1969 #endif
|
|
|
1970
|
|
|
1971 /* If the cursor is below botline, we will at least scroll by the height
|
|
|
1972 * of the cursor line. Correct for empty lines, which are really part of
|
|
|
1973 * botline. */
|
|
|
1974 if (cln >= curwin->w_botline)
|
|
|
1975 {
|
|
|
1976 scrolled = used;
|
|
|
1977 if (cln == curwin->w_botline)
|
|
|
1978 scrolled -= curwin->w_empty_rows;
|
|
|
1979 }
|
|
|
1980
|
|
|
1981 /*
|
|
|
1982 * Stop counting lines to scroll when
|
|
|
1983 * - hitting start of the file
|
|
|
1984 * - scrolled nothing or at least 'sj' lines
|
|
|
1985 * - at least 'so' lines below the cursor
|
|
|
1986 * - lines between botline and cursor have been counted
|
|
|
1987 */
|
|
|
1988 #ifdef FEAT_FOLDING
|
|
|
1989 if (!hasFolding(curwin->w_cursor.lnum, &loff.lnum, &boff.lnum))
|
|
|
1990 #endif
|
|
|
1991 {
|
|
|
1992 loff.lnum = cln;
|
|
|
1993 boff.lnum = cln;
|
|
|
1994 }
|
|
|
1995 #ifdef FEAT_DIFF
|
|
|
1996 loff.fill = 0;
|
|
|
1997 boff.fill = 0;
|
|
|
1998 fill_below_window = diff_check_fill(curwin, curwin->w_botline)
|
|
|
1999 - curwin->w_filler_rows;
|
|
|
2000 #endif
|
|
|
2001
|
|
|
2002 while (loff.lnum > 1)
|
|
|
2003 {
|
|
|
2004 /* Stop when scrolled nothing or at least "min_scroll", found "extra"
|
|
|
2005 * context for 'scrolloff' and counted all lines below the window. */
|
|
|
2006 if ((((scrolled <= 0 || scrolled >= min_scroll)
|
|
|
2007 && extra >= (
|
|
|
2008 #ifdef FEAT_MOUSE
|
|
1121
|
2009 mouse_dragging > 0 ? mouse_dragging - 1 :
|
|
7
|
2010 #endif
|
|
|
2011 p_so))
|
|
|
2012 || boff.lnum + 1 > curbuf->b_ml.ml_line_count)
|
|
|
2013 && loff.lnum <= curwin->w_botline
|
|
|
2014 #ifdef FEAT_DIFF
|
|
|
2015 && (loff.lnum < curwin->w_botline
|
|
|
2016 || loff.fill >= fill_below_window)
|
|
|
2017 #endif
|
|
|
2018 )
|
|
|
2019 break;
|
|
|
2020
|
|
|
2021 /* Add one line above */
|
|
|
2022 topline_back(&loff);
|
|
|
2023 used += loff.height;
|
|
|
2024 if (used > curwin->w_height)
|
|
|
2025 break;
|
|
|
2026 if (loff.lnum >= curwin->w_botline
|
|
|
2027 #ifdef FEAT_DIFF
|
|
|
2028 && (loff.lnum > curwin->w_botline
|
|
|
2029 || loff.fill <= fill_below_window)
|
|
|
2030 #endif
|
|
|
2031 )
|
|
|
2032 {
|
|
|
2033 /* Count screen lines that are below the window. */
|
|
|
2034 scrolled += loff.height;
|
|
|
2035 if (loff.lnum == curwin->w_botline
|
|
|
2036 #ifdef FEAT_DIFF
|
|
|
2037 && boff.fill == 0
|
|
|
2038 #endif
|
|
|
2039 )
|
|
|
2040 scrolled -= curwin->w_empty_rows;
|
|
|
2041 }
|
|
|
2042
|
|
|
2043 if (boff.lnum < curbuf->b_ml.ml_line_count)
|
|
|
2044 {
|
|
|
2045 /* Add one line below */
|
|
|
2046 botline_forw(&boff);
|
|
|
2047 used += boff.height;
|
|
|
2048 if (used > curwin->w_height)
|
|
|
2049 break;
|
|
|
2050 if (extra < (
|
|
|
2051 #ifdef FEAT_MOUSE
|
|
|
2052 mouse_dragging > 0 ? mouse_dragging - 1 :
|
|
|
2053 #endif
|
|
|
2054 p_so) || scrolled < min_scroll)
|
|
|
2055 {
|
|
|
2056 extra += boff.height;
|
|
|
2057 if (boff.lnum >= curwin->w_botline
|
|
|
2058 #ifdef FEAT_DIFF
|
|
|
2059 || (boff.lnum + 1 == curwin->w_botline
|
|
|
2060 && boff.fill > curwin->w_filler_rows)
|
|
|
2061 #endif
|
|
|
2062 )
|
|
|
2063 {
|
|
|
2064 /* Count screen lines that are below the window. */
|
|
|
2065 scrolled += boff.height;
|
|
|
2066 if (boff.lnum == curwin->w_botline
|
|
|
2067 #ifdef FEAT_DIFF
|
|
|
2068 && boff.fill == 0
|
|
|
2069 #endif
|
|
|
2070 )
|
|
|
2071 scrolled -= curwin->w_empty_rows;
|
|
|
2072 }
|
|
|
2073 }
|
|
|
2074 }
|
|
|
2075 }
|
|
|
2076
|
|
|
2077 /* curwin->w_empty_rows is larger, no need to scroll */
|
|
|
2078 if (scrolled <= 0)
|
|
|
2079 line_count = 0;
|
|
|
2080 /* more than a screenfull, don't scroll but redraw */
|
|
|
2081 else if (used > curwin->w_height)
|
|
|
2082 line_count = used;
|
|
|
2083 /* scroll minimal number of lines */
|
|
|
2084 else
|
|
|
2085 {
|
|
|
2086 line_count = 0;
|
|
|
2087 #ifdef FEAT_DIFF
|
|
|
2088 boff.fill = curwin->w_topfill;
|
|
|
2089 #endif
|
|
|
2090 boff.lnum = curwin->w_topline - 1;
|
|
|
2091 for (i = 0; i < scrolled && boff.lnum < curwin->w_botline; )
|
|
|
2092 {
|
|
|
2093 botline_forw(&boff);
|
|
|
2094 i += boff.height;
|
|
|
2095 ++line_count;
|
|
|
2096 }
|
|
|
2097 if (i < scrolled) /* below curwin->w_botline, don't scroll */
|
|
|
2098 line_count = 9999;
|
|
|
2099 }
|
|
|
2100
|
|
|
2101 /*
|
|
|
2102 * Scroll up if the cursor is off the bottom of the screen a bit.
|
|
|
2103 * Otherwise put it at 1/2 of the screen.
|
|
|
2104 */
|
|
|
2105 if (line_count >= curwin->w_height && line_count > min_scroll)
|
|
|
2106 scroll_cursor_halfway(FALSE);
|
|
|
2107 else
|
|
|
2108 scrollup(line_count, TRUE);
|
|
|
2109
|
|
|
2110 /*
|
|
|
2111 * If topline didn't change we need to restore w_botline and w_empty_rows
|
|
|
2112 * (we changed them).
|
|
|
2113 * If topline did change, update_screen() will set botline.
|
|
|
2114 */
|
|
|
2115 if (curwin->w_topline == old_topline && set_topbot)
|
|
|
2116 {
|
|
|
2117 curwin->w_botline = old_botline;
|
|
|
2118 curwin->w_empty_rows = old_empty_rows;
|
|
|
2119 curwin->w_valid = old_valid;
|
|
|
2120 }
|
|
|
2121 curwin->w_valid |= VALID_TOPLINE;
|
|
|
2122 }
|
|
|
2123
|
|
|
2124 /*
|
|
|
2125 * Recompute topline to put the cursor halfway the window
|
|
|
2126 * If "atend" is TRUE, also put it halfway at the end of the file.
|
|
|
2127 */
|
|
|
2128 void
|
|
|
2129 scroll_cursor_halfway(atend)
|
|
|
2130 int atend;
|
|
|
2131 {
|
|
|
2132 int above = 0;
|
|
|
2133 linenr_T topline;
|
|
|
2134 #ifdef FEAT_DIFF
|
|
|
2135 int topfill = 0;
|
|
|
2136 #endif
|
|
|
2137 int below = 0;
|
|
|
2138 int used;
|
|
|
2139 lineoff_T loff;
|
|
|
2140 lineoff_T boff;
|
|
|
2141
|
|
|
2142 loff.lnum = boff.lnum = curwin->w_cursor.lnum;
|
|
|
2143 #ifdef FEAT_FOLDING
|
|
|
2144 (void)hasFolding(loff.lnum, &loff.lnum, &boff.lnum);
|
|
|
2145 #endif
|
|
|
2146 #ifdef FEAT_DIFF
|
|
|
2147 used = plines_nofill(loff.lnum);
|
|
|
2148 loff.fill = 0;
|
|
|
2149 boff.fill = 0;
|
|
|
2150 #else
|
|
|
2151 used = plines(loff.lnum);
|
|
|
2152 #endif
|
|
|
2153 topline = loff.lnum;
|
|
|
2154 while (topline > 1)
|
|
|
2155 {
|
|
|
2156 if (below <= above) /* add a line below the cursor first */
|
|
|
2157 {
|
|
|
2158 if (boff.lnum < curbuf->b_ml.ml_line_count)
|
|
|
2159 {
|
|
|
2160 botline_forw(&boff);
|
|
|
2161 used += boff.height;
|
|
|
2162 if (used > curwin->w_height)
|
|
|
2163 break;
|
|
|
2164 below += boff.height;
|
|
|
2165 }
|
|
|
2166 else
|
|
|
2167 {
|
|
|
2168 ++below; /* count a "~" line */
|
|
|
2169 if (atend)
|
|
|
2170 ++used;
|
|
|
2171 }
|
|
|
2172 }
|
|
|
2173
|
|
|
2174 if (below > above) /* add a line above the cursor */
|
|
|
2175 {
|
|
|
2176 topline_back(&loff);
|
|
|
2177 used += loff.height;
|
|
|
2178 if (used > curwin->w_height)
|
|
|
2179 break;
|
|
|
2180 above += loff.height;
|
|
|
2181 topline = loff.lnum;
|
|
|
2182 #ifdef FEAT_DIFF
|
|
|
2183 topfill = loff.fill;
|
|
|
2184 #endif
|
|
|
2185 }
|
|
|
2186 }
|
|
|
2187 #ifdef FEAT_FOLDING
|
|
|
2188 if (!hasFolding(topline, &curwin->w_topline, NULL))
|
|
|
2189 #endif
|
|
|
2190 curwin->w_topline = topline;
|
|
|
2191 #ifdef FEAT_DIFF
|
|
|
2192 curwin->w_topfill = topfill;
|
|
|
2193 check_topfill(curwin, FALSE);
|
|
|
2194 #endif
|
|
|
2195 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
2196 curwin->w_valid |= VALID_TOPLINE;
|
|
|
2197 }
|
|
|
2198
|
|
|
2199 /*
|
|
|
2200 * Correct the cursor position so that it is in a part of the screen at least
|
|
|
2201 * 'so' lines from the top and bottom, if possible.
|
|
|
2202 * If not possible, put it at the same position as scroll_cursor_halfway().
|
|
|
2203 * When called topline must be valid!
|
|
|
2204 */
|
|
|
2205 void
|
|
|
2206 cursor_correct()
|
|
|
2207 {
|
|
|
2208 int above = 0; /* screen lines above topline */
|
|
|
2209 linenr_T topline;
|
|
|
2210 int below = 0; /* screen lines below botline */
|
|
|
2211 linenr_T botline;
|
|
|
2212 int above_wanted, below_wanted;
|
|
|
2213 linenr_T cln; /* Cursor Line Number */
|
|
|
2214 int max_off;
|
|
|
2215
|
|
|
2216 /*
|
|
|
2217 * How many lines we would like to have above/below the cursor depends on
|
|
|
2218 * whether the first/last line of the file is on screen.
|
|
|
2219 */
|
|
|
2220 above_wanted = p_so;
|
|
|
2221 below_wanted = p_so;
|
|
|
2222 #ifdef FEAT_MOUSE
|
|
1121
|
2223 if (mouse_dragging > 0)
|
|
7
|
2224 {
|
|
|
2225 above_wanted = mouse_dragging - 1;
|
|
|
2226 below_wanted = mouse_dragging - 1;
|
|
|
2227 }
|
|
|
2228 #endif
|
|
|
2229 if (curwin->w_topline == 1)
|
|
|
2230 {
|
|
|
2231 above_wanted = 0;
|
|
|
2232 max_off = curwin->w_height / 2;
|
|
|
2233 if (below_wanted > max_off)
|
|
|
2234 below_wanted = max_off;
|
|
|
2235 }
|
|
|
2236 validate_botline();
|
|
|
2237 if (curwin->w_botline == curbuf->b_ml.ml_line_count + 1
|
|
|
2238 #ifdef FEAT_MOUSE
|
|
1121
|
2239 && mouse_dragging == 0
|
|
7
|
2240 #endif
|
|
|
2241 )
|
|
|
2242 {
|
|
|
2243 below_wanted = 0;
|
|
|
2244 max_off = (curwin->w_height - 1) / 2;
|
|
|
2245 if (above_wanted > max_off)
|
|
|
2246 above_wanted = max_off;
|
|
|
2247 }
|
|
|
2248
|
|
|
2249 /*
|
|
|
2250 * If there are sufficient file-lines above and below the cursor, we can
|
|
|
2251 * return now.
|
|
|
2252 */
|
|
|
2253 cln = curwin->w_cursor.lnum;
|
|
|
2254 if (cln >= curwin->w_topline + above_wanted
|
|
|
2255 && cln < curwin->w_botline - below_wanted
|
|
|
2256 #ifdef FEAT_FOLDING
|
|
|
2257 && !hasAnyFolding(curwin)
|
|
|
2258 #endif
|
|
|
2259 )
|
|
|
2260 return;
|
|
|
2261
|
|
|
2262 /*
|
|
|
2263 * Narrow down the area where the cursor can be put by taking lines from
|
|
|
2264 * the top and the bottom until:
|
|
|
2265 * - the desired context lines are found
|
|
|
2266 * - the lines from the top is past the lines from the bottom
|
|
|
2267 */
|
|
|
2268 topline = curwin->w_topline;
|
|
|
2269 botline = curwin->w_botline - 1;
|
|
|
2270 #ifdef FEAT_DIFF
|
|
|
2271 /* count filler lines as context */
|
|
|
2272 above = curwin->w_topfill;
|
|
|
2273 below = curwin->w_filler_rows;
|
|
|
2274 #endif
|
|
|
2275 while ((above < above_wanted || below < below_wanted) && topline < botline)
|
|
|
2276 {
|
|
|
2277 if (below < below_wanted && (below <= above || above >= above_wanted))
|
|
|
2278 {
|
|
|
2279 #ifdef FEAT_FOLDING
|
|
|
2280 if (hasFolding(botline, &botline, NULL))
|
|
|
2281 ++below;
|
|
|
2282 else
|
|
|
2283 #endif
|
|
|
2284 below += plines(botline);
|
|
|
2285 --botline;
|
|
|
2286 }
|
|
|
2287 if (above < above_wanted && (above < below || below >= below_wanted))
|
|
|
2288 {
|
|
|
2289 #ifdef FEAT_FOLDING
|
|
|
2290 if (hasFolding(topline, NULL, &topline))
|
|
|
2291 ++above;
|
|
|
2292 else
|
|
|
2293 #endif
|
|
|
2294 #ifndef FEAT_DIFF
|
|
|
2295 above += plines(topline);
|
|
|
2296 #else
|
|
|
2297 above += plines_nofill(topline);
|
|
|
2298
|
|
|
2299 /* Count filler lines below this line as context. */
|
|
|
2300 if (topline < botline)
|
|
|
2301 above += diff_check_fill(curwin, topline + 1);
|
|
|
2302 #endif
|
|
|
2303 ++topline;
|
|
|
2304 }
|
|
|
2305 }
|
|
|
2306 if (topline == botline || botline == 0)
|
|
|
2307 curwin->w_cursor.lnum = topline;
|
|
|
2308 else if (topline > botline)
|
|
|
2309 curwin->w_cursor.lnum = botline;
|
|
|
2310 else
|
|
|
2311 {
|
|
|
2312 if (cln < topline && curwin->w_topline > 1)
|
|
|
2313 {
|
|
|
2314 curwin->w_cursor.lnum = topline;
|
|
|
2315 curwin->w_valid &=
|
|
|
2316 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW);
|
|
|
2317 }
|
|
|
2318 if (cln > botline && curwin->w_botline <= curbuf->b_ml.ml_line_count)
|
|
|
2319 {
|
|
|
2320 curwin->w_cursor.lnum = botline;
|
|
|
2321 curwin->w_valid &=
|
|
|
2322 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW);
|
|
|
2323 }
|
|
|
2324 }
|
|
|
2325 curwin->w_valid |= VALID_TOPLINE;
|
|
|
2326 }
|
|
|
2327
|
|
|
2328 static void get_scroll_overlap __ARGS((lineoff_T *lp, int dir));
|
|
|
2329
|
|
|
2330 /*
|
|
|
2331 * move screen 'count' pages up or down and update screen
|
|
|
2332 *
|
|
|
2333 * return FAIL for failure, OK otherwise
|
|
|
2334 */
|
|
|
2335 int
|
|
|
2336 onepage(dir, count)
|
|
|
2337 int dir;
|
|
|
2338 long count;
|
|
|
2339 {
|
|
|
2340 long n;
|
|
|
2341 int retval = OK;
|
|
|
2342 lineoff_T loff;
|
|
|
2343 linenr_T old_topline = curwin->w_topline;
|
|
|
2344
|
|
|
2345 if (curbuf->b_ml.ml_line_count == 1) /* nothing to do */
|
|
|
2346 {
|
|
|
2347 beep_flush();
|
|
|
2348 return FAIL;
|
|
|
2349 }
|
|
|
2350
|
|
|
2351 for ( ; count > 0; --count)
|
|
|
2352 {
|
|
|
2353 validate_botline();
|
|
|
2354 /*
|
|
|
2355 * It's an error to move a page up when the first line is already on
|
|
|
2356 * the screen. It's an error to move a page down when the last line
|
|
|
2357 * is on the screen and the topline is 'scrolloff' lines from the
|
|
|
2358 * last line.
|
|
|
2359 */
|
|
|
2360 if (dir == FORWARD
|
|
|
2361 ? ((curwin->w_topline >= curbuf->b_ml.ml_line_count - p_so)
|
|
|
2362 && curwin->w_botline > curbuf->b_ml.ml_line_count)
|
|
|
2363 : (curwin->w_topline == 1
|
|
|
2364 #ifdef FEAT_DIFF
|
|
|
2365 && curwin->w_topfill ==
|
|
|
2366 diff_check_fill(curwin, curwin->w_topline)
|
|
|
2367 #endif
|
|
|
2368 ))
|
|
|
2369 {
|
|
|
2370 beep_flush();
|
|
|
2371 retval = FAIL;
|
|
|
2372 break;
|
|
|
2373 }
|
|
|
2374
|
|
|
2375 #ifdef FEAT_DIFF
|
|
|
2376 loff.fill = 0;
|
|
|
2377 #endif
|
|
|
2378 if (dir == FORWARD)
|
|
|
2379 {
|
|
164
|
2380 if (firstwin == lastwin && p_window > 0 && p_window < Rows - 1)
|
|
7
|
2381 {
|
|
164
|
2382 /* Vi compatible scrolling */
|
|
|
2383 if (p_window <= 2)
|
|
|
2384 ++curwin->w_topline;
|
|
|
2385 else
|
|
|
2386 curwin->w_topline += p_window - 2;
|
|
|
2387 if (curwin->w_topline > curbuf->b_ml.ml_line_count)
|
|
|
2388 curwin->w_topline = curbuf->b_ml.ml_line_count;
|
|
|
2389 curwin->w_cursor.lnum = curwin->w_topline;
|
|
|
2390 }
|
|
|
2391 else if (curwin->w_botline > curbuf->b_ml.ml_line_count)
|
|
|
2392 {
|
|
|
2393 /* at end of file */
|
|
7
|
2394 curwin->w_topline = curbuf->b_ml.ml_line_count;
|
|
|
2395 #ifdef FEAT_DIFF
|
|
|
2396 curwin->w_topfill = 0;
|
|
|
2397 #endif
|
|
|
2398 curwin->w_valid &= ~(VALID_WROW|VALID_CROW);
|
|
|
2399 }
|
|
|
2400 else
|
|
|
2401 {
|
|
|
2402 /* For the overlap, start with the line just below the window
|
|
|
2403 * and go upwards. */
|
|
|
2404 loff.lnum = curwin->w_botline;
|
|
|
2405 #ifdef FEAT_DIFF
|
|
|
2406 loff.fill = diff_check_fill(curwin, loff.lnum)
|
|
|
2407 - curwin->w_filler_rows;
|
|
|
2408 #endif
|
|
|
2409 get_scroll_overlap(&loff, -1);
|
|
|
2410 curwin->w_topline = loff.lnum;
|
|
|
2411 #ifdef FEAT_DIFF
|
|
|
2412 curwin->w_topfill = loff.fill;
|
|
|
2413 check_topfill(curwin, FALSE);
|
|
|
2414 #endif
|
|
|
2415 curwin->w_cursor.lnum = curwin->w_topline;
|
|
|
2416 curwin->w_valid &= ~(VALID_WCOL|VALID_CHEIGHT|VALID_WROW|
|
|
|
2417 VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
2418 }
|
|
|
2419 }
|
|
|
2420 else /* dir == BACKWARDS */
|
|
|
2421 {
|
|
|
2422 #ifdef FEAT_DIFF
|
|
|
2423 if (curwin->w_topline == 1)
|
|
|
2424 {
|
|
|
2425 /* Include max number of filler lines */
|
|
|
2426 max_topfill();
|
|
|
2427 continue;
|
|
|
2428 }
|
|
|
2429 #endif
|
|
164
|
2430 if (firstwin == lastwin && p_window > 0 && p_window < Rows - 1)
|
|
|
2431 {
|
|
|
2432 /* Vi compatible scrolling (sort of) */
|
|
|
2433 if (p_window <= 2)
|
|
|
2434 --curwin->w_topline;
|
|
|
2435 else
|
|
|
2436 curwin->w_topline -= p_window - 2;
|
|
|
2437 if (curwin->w_topline < 1)
|
|
|
2438 curwin->w_topline = 1;
|
|
|
2439 curwin->w_cursor.lnum = curwin->w_topline + p_window - 1;
|
|
|
2440 if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
|
|
|
2441 curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
|
|
|
2442 continue;
|
|
|
2443 }
|
|
|
2444
|
|
7
|
2445 /* Find the line at the top of the window that is going to be the
|
|
|
2446 * line at the bottom of the window. Make sure this results in
|
|
|
2447 * the same line as before doing CTRL-F. */
|
|
|
2448 loff.lnum = curwin->w_topline - 1;
|
|
|
2449 #ifdef FEAT_DIFF
|
|
|
2450 loff.fill = diff_check_fill(curwin, loff.lnum + 1)
|
|
|
2451 - curwin->w_topfill;
|
|
|
2452 #endif
|
|
|
2453 get_scroll_overlap(&loff, 1);
|
|
|
2454
|
|
|
2455 if (loff.lnum >= curbuf->b_ml.ml_line_count)
|
|
|
2456 {
|
|
|
2457 loff.lnum = curbuf->b_ml.ml_line_count;
|
|
|
2458 #ifdef FEAT_DIFF
|
|
|
2459 loff.fill = 0;
|
|
|
2460 }
|
|
|
2461 else
|
|
|
2462 {
|
|
|
2463 botline_topline(&loff);
|
|
|
2464 #endif
|
|
|
2465 }
|
|
|
2466 curwin->w_cursor.lnum = loff.lnum;
|
|
|
2467
|
|
|
2468 /* Find the line just above the new topline to get the right line
|
|
|
2469 * at the bottom of the window. */
|
|
|
2470 n = 0;
|
|
|
2471 while (n <= curwin->w_height && loff.lnum >= 1)
|
|
|
2472 {
|
|
|
2473 topline_back(&loff);
|
|
|
2474 n += loff.height;
|
|
|
2475 }
|
|
|
2476 if (n <= curwin->w_height) /* at begin of file */
|
|
|
2477 {
|
|
|
2478 curwin->w_topline = 1;
|
|
|
2479 #ifdef FEAT_DIFF
|
|
|
2480 max_topfill();
|
|
|
2481 #endif
|
|
|
2482 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
2483 }
|
|
|
2484 else
|
|
|
2485 {
|
|
|
2486 /* Go two lines forward again. */
|
|
|
2487 #ifdef FEAT_DIFF
|
|
|
2488 topline_botline(&loff);
|
|
|
2489 #endif
|
|
|
2490 botline_forw(&loff);
|
|
|
2491 botline_forw(&loff);
|
|
|
2492 #ifdef FEAT_DIFF
|
|
|
2493 botline_topline(&loff);
|
|
|
2494 #endif
|
|
|
2495 #ifdef FEAT_FOLDING
|
|
|
2496 /* We're at the wrong end of a fold now. */
|
|
|
2497 (void)hasFolding(loff.lnum, &loff.lnum, NULL);
|
|
|
2498 #endif
|
|
|
2499
|
|
|
2500 /* Always scroll at least one line. Avoid getting stuck on
|
|
|
2501 * very long lines. */
|
|
|
2502 if (loff.lnum >= curwin->w_topline
|
|
|
2503 #ifdef FEAT_DIFF
|
|
|
2504 && (loff.lnum > curwin->w_topline
|
|
|
2505 || loff.fill >= curwin->w_topfill)
|
|
|
2506 #endif
|
|
|
2507 )
|
|
|
2508 {
|
|
|
2509 #ifdef FEAT_DIFF
|
|
|
2510 /* First try using the maximum number of filler lines. If
|
|
|
2511 * that's not enough, backup one line. */
|
|
|
2512 loff.fill = curwin->w_topfill;
|
|
|
2513 if (curwin->w_topfill < diff_check_fill(curwin,
|
|
|
2514 curwin->w_topline))
|
|
|
2515 max_topfill();
|
|
|
2516 if (curwin->w_topfill == loff.fill)
|
|
|
2517 #endif
|
|
|
2518 {
|
|
|
2519 --curwin->w_topline;
|
|
|
2520 #ifdef FEAT_DIFF
|
|
|
2521 curwin->w_topfill = 0;
|
|
|
2522 #endif
|
|
|
2523 }
|
|
|
2524 comp_botline(curwin);
|
|
|
2525 curwin->w_cursor.lnum = curwin->w_botline - 1;
|
|
|
2526 curwin->w_valid &= ~(VALID_WCOL|VALID_CHEIGHT|
|
|
|
2527 VALID_WROW|VALID_CROW);
|
|
|
2528 }
|
|
|
2529 else
|
|
|
2530 {
|
|
|
2531 curwin->w_topline = loff.lnum;
|
|
|
2532 #ifdef FEAT_DIFF
|
|
|
2533 curwin->w_topfill = loff.fill;
|
|
|
2534 check_topfill(curwin, FALSE);
|
|
|
2535 #endif
|
|
|
2536 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
2537 }
|
|
|
2538 }
|
|
|
2539 }
|
|
|
2540 }
|
|
|
2541 #ifdef FEAT_FOLDING
|
|
|
2542 foldAdjustCursor();
|
|
|
2543 #endif
|
|
|
2544 cursor_correct();
|
|
161
|
2545 if (retval == OK)
|
|
|
2546 beginline(BL_SOL | BL_FIX);
|
|
7
|
2547 curwin->w_valid &= ~(VALID_WCOL|VALID_WROW|VALID_VIRTCOL);
|
|
|
2548
|
|
|
2549 /*
|
|
|
2550 * Avoid the screen jumping up and down when 'scrolloff' is non-zero.
|
|
|
2551 * But make sure we scroll at least one line (happens with mix of long
|
|
|
2552 * wrapping lines and non-wrapping line).
|
|
|
2553 */
|
|
|
2554 if (retval == OK && dir == FORWARD && check_top_offset())
|
|
|
2555 {
|
|
|
2556 scroll_cursor_top(1, FALSE);
|
|
|
2557 if (curwin->w_topline <= old_topline
|
|
|
2558 && old_topline < curbuf->b_ml.ml_line_count)
|
|
|
2559 {
|
|
|
2560 curwin->w_topline = old_topline + 1;
|
|
|
2561 #ifdef FEAT_FOLDING
|
|
|
2562 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
2563 #endif
|
|
|
2564 }
|
|
|
2565 }
|
|
|
2566
|
|
|
2567 redraw_later(VALID);
|
|
|
2568 return retval;
|
|
|
2569 }
|
|
|
2570
|
|
|
2571 /*
|
|
|
2572 * Decide how much overlap to use for page-up or page-down scrolling.
|
|
|
2573 * This is symmetric, so that doing both keeps the same lines displayed.
|
|
|
2574 * Three lines are examined:
|
|
|
2575 *
|
|
|
2576 * before CTRL-F after CTRL-F / before CTRL-B
|
|
|
2577 * etc. l1
|
|
|
2578 * l1 last but one line ------------
|
|
|
2579 * l2 last text line l2 top text line
|
|
|
2580 * ------------- l3 second text line
|
|
|
2581 * l3 etc.
|
|
|
2582 */
|
|
|
2583 static void
|
|
|
2584 get_scroll_overlap(lp, dir)
|
|
|
2585 lineoff_T *lp;
|
|
|
2586 int dir;
|
|
|
2587 {
|
|
|
2588 int h1, h2, h3, h4;
|
|
|
2589 int min_height = curwin->w_height - 2;
|
|
|
2590 lineoff_T loff0, loff1, loff2;
|
|
|
2591
|
|
|
2592 #ifdef FEAT_DIFF
|
|
|
2593 if (lp->fill > 0)
|
|
|
2594 lp->height = 1;
|
|
|
2595 else
|
|
|
2596 lp->height = plines_nofill(lp->lnum);
|
|
|
2597 #else
|
|
|
2598 lp->height = plines(lp->lnum);
|
|
|
2599 #endif
|
|
|
2600 h1 = lp->height;
|
|
|
2601 if (h1 > min_height)
|
|
|
2602 return; /* no overlap */
|
|
|
2603
|
|
|
2604 loff0 = *lp;
|
|
|
2605 if (dir > 0)
|
|
|
2606 botline_forw(lp);
|
|
|
2607 else
|
|
|
2608 topline_back(lp);
|
|
|
2609 h2 = lp->height;
|
|
|
2610 if (h2 + h1 > min_height)
|
|
|
2611 {
|
|
|
2612 *lp = loff0; /* no overlap */
|
|
|
2613 return;
|
|
|
2614 }
|
|
|
2615
|
|
|
2616 loff1 = *lp;
|
|
|
2617 if (dir > 0)
|
|
|
2618 botline_forw(lp);
|
|
|
2619 else
|
|
|
2620 topline_back(lp);
|
|
|
2621 h3 = lp->height;
|
|
|
2622 if (h3 + h2 > min_height)
|
|
|
2623 {
|
|
|
2624 *lp = loff0; /* no overlap */
|
|
|
2625 return;
|
|
|
2626 }
|
|
|
2627
|
|
|
2628 loff2 = *lp;
|
|
|
2629 if (dir > 0)
|
|
|
2630 botline_forw(lp);
|
|
|
2631 else
|
|
|
2632 topline_back(lp);
|
|
|
2633 h4 = lp->height;
|
|
|
2634 if (h4 + h3 + h2 > min_height || h3 + h2 + h1 > min_height)
|
|
|
2635 *lp = loff1; /* 1 line overlap */
|
|
|
2636 else
|
|
|
2637 *lp = loff2; /* 2 lines overlap */
|
|
|
2638 return;
|
|
|
2639 }
|
|
|
2640
|
|
|
2641 /* #define KEEP_SCREEN_LINE */
|
|
|
2642 /*
|
|
|
2643 * Scroll 'scroll' lines up or down.
|
|
|
2644 */
|
|
|
2645 void
|
|
|
2646 halfpage(flag, Prenum)
|
|
|
2647 int flag;
|
|
|
2648 linenr_T Prenum;
|
|
|
2649 {
|
|
|
2650 long scrolled = 0;
|
|
|
2651 int i;
|
|
|
2652 int n;
|
|
|
2653 int room;
|
|
|
2654
|
|
|
2655 if (Prenum)
|
|
|
2656 curwin->w_p_scr = (Prenum > curwin->w_height) ?
|
|
|
2657 curwin->w_height : Prenum;
|
|
|
2658 n = (curwin->w_p_scr <= curwin->w_height) ?
|
|
|
2659 curwin->w_p_scr : curwin->w_height;
|
|
|
2660
|
|
|
2661 validate_botline();
|
|
|
2662 room = curwin->w_empty_rows;
|
|
|
2663 #ifdef FEAT_DIFF
|
|
|
2664 room += curwin->w_filler_rows;
|
|
|
2665 #endif
|
|
|
2666 if (flag)
|
|
|
2667 {
|
|
|
2668 /*
|
|
|
2669 * scroll the text up
|
|
|
2670 */
|
|
|
2671 while (n > 0 && curwin->w_botline <= curbuf->b_ml.ml_line_count)
|
|
|
2672 {
|
|
|
2673 #ifdef FEAT_DIFF
|
|
|
2674 if (curwin->w_topfill > 0)
|
|
|
2675 {
|
|
|
2676 i = 1;
|
|
|
2677 if (--n < 0 && scrolled > 0)
|
|
|
2678 break;
|
|
|
2679 --curwin->w_topfill;
|
|
|
2680 }
|
|
|
2681 else
|
|
|
2682 #endif
|
|
|
2683 {
|
|
|
2684 #ifdef FEAT_DIFF
|
|
|
2685 i = plines_nofill(curwin->w_topline);
|
|
|
2686 #else
|
|
|
2687 i = plines(curwin->w_topline);
|
|
|
2688 #endif
|
|
|
2689 n -= i;
|
|
|
2690 if (n < 0 && scrolled > 0)
|
|
|
2691 break;
|
|
|
2692 #ifdef FEAT_FOLDING
|
|
|
2693 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline);
|
|
|
2694 #endif
|
|
|
2695 ++curwin->w_topline;
|
|
|
2696 #ifdef FEAT_DIFF
|
|
|
2697 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline);
|
|
|
2698 #endif
|
|
|
2699
|
|
|
2700 #ifndef KEEP_SCREEN_LINE
|
|
|
2701 if (curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
|
|
|
2702 {
|
|
|
2703 ++curwin->w_cursor.lnum;
|
|
|
2704 curwin->w_valid &=
|
|
|
2705 ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL);
|
|
|
2706 }
|
|
|
2707 #endif
|
|
|
2708 }
|
|
|
2709 curwin->w_valid &= ~(VALID_CROW|VALID_WROW);
|
|
|
2710 scrolled += i;
|
|
|
2711
|
|
|
2712 /*
|
|
|
2713 * Correct w_botline for changed w_topline.
|
|
|
2714 * Won't work when there are filler lines.
|
|
|
2715 */
|
|
|
2716 #ifdef FEAT_DIFF
|
|
|
2717 if (curwin->w_p_diff)
|
|
|
2718 curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
2719 else
|
|
|
2720 #endif
|
|
|
2721 {
|
|
|
2722 room += i;
|
|
|
2723 do
|
|
|
2724 {
|
|
|
2725 i = plines(curwin->w_botline);
|
|
|
2726 if (i > room)
|
|
|
2727 break;
|
|
|
2728 #ifdef FEAT_FOLDING
|
|
|
2729 (void)hasFolding(curwin->w_botline, NULL,
|
|
|
2730 &curwin->w_botline);
|
|
|
2731 #endif
|
|
|
2732 ++curwin->w_botline;
|
|
|
2733 room -= i;
|
|
|
2734 } while (curwin->w_botline <= curbuf->b_ml.ml_line_count);
|
|
|
2735 }
|
|
|
2736 }
|
|
|
2737
|
|
|
2738 #ifndef KEEP_SCREEN_LINE
|
|
|
2739 /*
|
|
|
2740 * When hit bottom of the file: move cursor down.
|
|
|
2741 */
|
|
|
2742 if (n > 0)
|
|
|
2743 {
|
|
|
2744 # ifdef FEAT_FOLDING
|
|
|
2745 if (hasAnyFolding(curwin))
|
|
|
2746 {
|
|
|
2747 while (--n >= 0
|
|
|
2748 && curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
|
|
|
2749 {
|
|
|
2750 (void)hasFolding(curwin->w_cursor.lnum, NULL,
|
|
|
2751 &curwin->w_cursor.lnum);
|
|
|
2752 ++curwin->w_cursor.lnum;
|
|
|
2753 }
|
|
|
2754 }
|
|
|
2755 else
|
|
|
2756 # endif
|
|
|
2757 curwin->w_cursor.lnum += n;
|
|
|
2758 check_cursor_lnum();
|
|
|
2759 }
|
|
|
2760 #else
|
|
|
2761 /* try to put the cursor in the same screen line */
|
|
|
2762 while ((curwin->w_cursor.lnum < curwin->w_topline || scrolled > 0)
|
|
|
2763 && curwin->w_cursor.lnum < curwin->w_botline - 1)
|
|
|
2764 {
|
|
|
2765 scrolled -= plines(curwin->w_cursor.lnum);
|
|
|
2766 if (scrolled < 0 && curwin->w_cursor.lnum >= curwin->w_topline)
|
|
|
2767 break;
|
|
|
2768 # ifdef FEAT_FOLDING
|
|
|
2769 (void)hasFolding(curwin->w_cursor.lnum, NULL,
|
|
|
2770 &curwin->w_cursor.lnum);
|
|
|
2771 # endif
|
|
|
2772 ++curwin->w_cursor.lnum;
|
|
|
2773 }
|
|
|
2774 #endif
|
|
|
2775 }
|
|
|
2776 else
|
|
|
2777 {
|
|
|
2778 /*
|
|
|
2779 * scroll the text down
|
|
|
2780 */
|
|
|
2781 while (n > 0 && curwin->w_topline > 1)
|
|
|
2782 {
|
|
|
2783 #ifdef FEAT_DIFF
|
|
|
2784 if (curwin->w_topfill < diff_check_fill(curwin, curwin->w_topline))
|
|
|
2785 {
|
|
|
2786 i = 1;
|
|
|
2787 if (--n < 0 && scrolled > 0)
|
|
|
2788 break;
|
|
|
2789 ++curwin->w_topfill;
|
|
|
2790 }
|
|
|
2791 else
|
|
|
2792 #endif
|
|
|
2793 {
|
|
|
2794 #ifdef FEAT_DIFF
|
|
|
2795 i = plines_nofill(curwin->w_topline - 1);
|
|
|
2796 #else
|
|
|
2797 i = plines(curwin->w_topline - 1);
|
|
|
2798 #endif
|
|
|
2799 n -= i;
|
|
|
2800 if (n < 0 && scrolled > 0)
|
|
|
2801 break;
|
|
|
2802 --curwin->w_topline;
|
|
|
2803 #ifdef FEAT_FOLDING
|
|
|
2804 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
2805 #endif
|
|
|
2806 #ifdef FEAT_DIFF
|
|
|
2807 curwin->w_topfill = 0;
|
|
|
2808 #endif
|
|
|
2809 }
|
|
|
2810 curwin->w_valid &= ~(VALID_CROW|VALID_WROW|
|
|
|
2811 VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
2812 scrolled += i;
|
|
|
2813 #ifndef KEEP_SCREEN_LINE
|
|
|
2814 if (curwin->w_cursor.lnum > 1)
|
|
|
2815 {
|
|
|
2816 --curwin->w_cursor.lnum;
|
|
|
2817 curwin->w_valid &= ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL);
|
|
|
2818 }
|
|
|
2819 #endif
|
|
|
2820 }
|
|
|
2821 #ifndef KEEP_SCREEN_LINE
|
|
|
2822 /*
|
|
|
2823 * When hit top of the file: move cursor up.
|
|
|
2824 */
|
|
|
2825 if (n > 0)
|
|
|
2826 {
|
|
|
2827 if (curwin->w_cursor.lnum <= (linenr_T)n)
|
|
|
2828 curwin->w_cursor.lnum = 1;
|
|
|
2829 else
|
|
|
2830 # ifdef FEAT_FOLDING
|
|
|
2831 if (hasAnyFolding(curwin))
|
|
|
2832 {
|
|
|
2833 while (--n >= 0 && curwin->w_cursor.lnum > 1)
|
|
|
2834 {
|
|
|
2835 --curwin->w_cursor.lnum;
|
|
|
2836 (void)hasFolding(curwin->w_cursor.lnum,
|
|
|
2837 &curwin->w_cursor.lnum, NULL);
|
|
|
2838 }
|
|
|
2839 }
|
|
|
2840 else
|
|
|
2841 # endif
|
|
|
2842 curwin->w_cursor.lnum -= n;
|
|
|
2843 }
|
|
|
2844 #else
|
|
|
2845 /* try to put the cursor in the same screen line */
|
|
|
2846 scrolled += n; /* move cursor when topline is 1 */
|
|
|
2847 while (curwin->w_cursor.lnum > curwin->w_topline
|
|
|
2848 && (scrolled > 0 || curwin->w_cursor.lnum >= curwin->w_botline))
|
|
|
2849 {
|
|
|
2850 scrolled -= plines(curwin->w_cursor.lnum - 1);
|
|
|
2851 if (scrolled < 0 && curwin->w_cursor.lnum < curwin->w_botline)
|
|
|
2852 break;
|
|
|
2853 --curwin->w_cursor.lnum;
|
|
|
2854 # ifdef FEAT_FOLDING
|
|
|
2855 foldAdjustCursor();
|
|
|
2856 # endif
|
|
|
2857 }
|
|
|
2858 #endif
|
|
|
2859 }
|
|
|
2860 # ifdef FEAT_FOLDING
|
|
|
2861 /* Move cursor to first line of closed fold. */
|
|
|
2862 foldAdjustCursor();
|
|
|
2863 # endif
|
|
|
2864 #ifdef FEAT_DIFF
|
|
|
2865 check_topfill(curwin, !flag);
|
|
|
2866 #endif
|
|
|
2867 cursor_correct();
|
|
|
2868 beginline(BL_SOL | BL_FIX);
|
|
|
2869 redraw_later(VALID);
|
|
|
2870 }
|
