Commit | Line | Data |
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19d73a0e DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
70190965 | 8 | static char *sccsid = "@(#)ex_vadj.c 7.9 (Berkeley) %G%"; |
19d73a0e DF |
9 | #endif not lint |
10 | ||
4bfebc61 MH |
11 | #include "ex.h" |
12 | #include "ex_tty.h" | |
13 | #include "ex_vis.h" | |
14 | ||
15 | /* | |
16 | * Routines to deal with management of logical versus physical | |
17 | * display, opening and redisplaying lines on the screen, and | |
18 | * use of intelligent terminal operations. Routines to deal with | |
19 | * screen cleanup after a change. | |
20 | */ | |
21 | ||
22 | /* | |
23 | * Display a new line at physical line p, returning | |
24 | * the depth of the newly displayed line. We may decide | |
25 | * to expand the window on an intelligent terminal if it is | |
26 | * less than a full screen by deleting a line above the top of the | |
27 | * window before doing an insert line to keep all the good text | |
28 | * on the screen in which case the line may actually end up | |
29 | * somewhere other than line p. | |
30 | */ | |
31 | vopen(tp, p) | |
32 | line *tp; | |
33 | int p; | |
34 | { | |
35 | register int cnt; | |
36 | register struct vlinfo *vp, *vpc; | |
37 | ||
38 | #ifdef ADEBUG | |
39 | if (trace != NULL) | |
40 | tfixnl(), fprintf(trace, "vopen(%d, %d)\n", lineno(tp), p); | |
41 | #endif | |
42 | if (state != VISUAL) { | |
43 | if (vcnt) | |
44 | if (hold & HOLDROL) | |
45 | vup1(); | |
46 | else | |
47 | vclean(); | |
48 | ||
49 | /* | |
50 | * Forget all that we once knew. | |
51 | */ | |
52 | vcnt = vcline = 0; | |
53 | p = WBOT; LASTLINE = WBOT + 1; | |
54 | state = bastate; | |
55 | WTOP = basWTOP; | |
56 | WLINES = basWLINES; | |
57 | } | |
58 | vpc = &vlinfo[vcline]; | |
59 | for (vp = &vlinfo[vcnt]; vp >= vpc; vp--) | |
60 | vlcopy(vp[1], vp[0]); | |
61 | vcnt++; | |
62 | if (Pline == numbline) | |
63 | /* | |
64 | * Dirtying all the lines is rather inefficient | |
65 | * internally, but number mode is used rarely | |
66 | * and so its not worth optimizing. | |
67 | */ | |
68 | vdirty(vcline+1, WECHO); | |
69 | getline(*tp); | |
70 | ||
71 | /* | |
72 | * If we are opening at the top of the window, can try a window | |
73 | * expansion at the top. | |
74 | */ | |
75 | if (state == VISUAL && vcline == 0 && vcnt > 1 && p > ZERO) { | |
76 | cnt = p + vdepth() - LINE(1); | |
77 | if (cnt > 0) { | |
78 | p -= cnt; | |
79 | if (p < ZERO) | |
80 | p = ZERO; | |
81 | WTOP = p; | |
82 | WLINES = WBOT - WTOP + 1; | |
83 | } | |
84 | } | |
85 | vpc->vliny = p, vpc->vdepth = 0, vpc->vflags = 0; | |
86 | cnt = vreopen(p, lineno(tp), vcline); | |
87 | if (vcline + 1 == vcnt) | |
88 | LINE(vcnt) = LINE(vcline) + cnt; | |
89 | } | |
90 | ||
91 | /* | |
92 | * Redisplay logical line l at physical line p with line number lineno. | |
93 | */ | |
94 | vreopen(p, lineno, l) | |
95 | int p, lineno, l; | |
96 | { | |
97 | register int d; | |
98 | register struct vlinfo *vp = &vlinfo[l]; | |
99 | ||
4bfebc61 MH |
100 | d = vp->vdepth; |
101 | if (d == 0 || (vp->vflags & VDIRT)) | |
102 | vp->vdepth = d = vdepth(); | |
103 | vp->vliny = p, vp->vflags &= ~VDIRT; | |
104 | ||
105 | /* | |
106 | * Try to win by making the screen larger rather than inserting | |
107 | * a line and driving text off the bottom. | |
108 | */ | |
109 | p = vglitchup(l, 0); | |
110 | ||
111 | /* | |
112 | * BUG: Should consider using CE here to clear to end of line. | |
113 | * As it stands we always strike over the current text. | |
114 | * Since often the current text is the same as what | |
115 | * we are overstriking with, it tends not to show. | |
116 | * On the other hand if it is different and we end up | |
117 | * spacing out a lot of text, we could have won with | |
118 | * a CE. This is probably worthwhile at low speed | |
119 | * only however, since clearly computation will be | |
120 | * necessary to determine which way to go. | |
121 | */ | |
122 | vigoto(p, 0); | |
123 | pline(lineno); | |
124 | ||
125 | /* | |
126 | * When we are typing part of a line for hardcopy open, don't | |
127 | * want to type the '$' marking an end of line if in list mode. | |
128 | */ | |
129 | if (hold & HOLDDOL) | |
130 | return (d); | |
131 | if (Putchar == listchar) | |
132 | putchar('$'); | |
133 | ||
134 | /* | |
135 | * Optimization of cursor motion may prevent screen rollup if the | |
136 | * line has blanks/tabs at the end unless we force the cursor to appear | |
137 | * on the last line segment. | |
138 | */ | |
139 | if (vp->vliny + d - 1 > WBOT) | |
140 | vcsync(); | |
141 | ||
142 | /* | |
143 | * Switch into hardcopy open mode if we are in one line (adm3) | |
144 | * open mode and this line is now too long. If in hardcopy | |
145 | * open mode, then call sethard to move onto the next line | |
146 | * with appropriate positioning. | |
147 | */ | |
148 | if (state == ONEOPEN) { | |
149 | WCOLS = OCOLUMNS; | |
150 | if (vdepth() > 1) { | |
151 | WCOLS = TUBECOLS; | |
152 | sethard(); | |
153 | } else | |
154 | WCOLS = TUBECOLS; | |
155 | } else if (state == HARDOPEN) | |
156 | sethard(); | |
157 | ||
158 | /* | |
159 | * Unless we filled (completely) the last line we typed on, | |
160 | * we have to clear to the end of the line | |
161 | * in case stuff is left from before. | |
162 | */ | |
163 | if (vp->vliny + d > destline) { | |
164 | if (IN && destcol == WCOLS) | |
165 | vigoto(vp->vliny + d - 1, 0); | |
166 | vclreol(); | |
167 | } | |
168 | return (d); | |
169 | } | |
170 | ||
171 | /* | |
172 | * Real work for winning growing of window at top | |
173 | * when inserting in the middle of a partially full | |
174 | * screen on an intelligent terminal. We have as argument | |
175 | * the logical line number to be inserted after, and the offset | |
176 | * from that line where the insert will go. | |
177 | * We look at the picture of depths and positions, and if we can | |
178 | * delete some (blank) lines from the top of the screen so that | |
179 | * later inserts will not push stuff off the bottom. | |
180 | */ | |
181 | vglitchup(l, o) | |
182 | int l, o; | |
183 | { | |
184 | register struct vlinfo *vp = &vlinfo[l]; | |
185 | register int need; | |
186 | register int p = vp->vliny; | |
187 | short oldhold, oldheldech; | |
188 | bool glitched = 0; | |
189 | ||
190 | if (l < vcnt - 1) { | |
191 | need = p + vp->vdepth - (vp+1)->vliny; | |
192 | if (need > 0) { | |
193 | if (state == VISUAL && WTOP - ZERO >= need && AL && DL) { | |
194 | glitched++; | |
195 | WTOP -= need; | |
196 | WLINES = WBOT - WTOP + 1; | |
197 | p -= need; | |
198 | if (p + o == WTOP) { | |
199 | vp->vliny = WTOP; | |
200 | return (WTOP + o); | |
201 | } | |
202 | vdellin(WTOP, need, -1); | |
203 | oldheldech = heldech; | |
204 | oldhold = hold; | |
205 | hold |= HOLDECH; | |
206 | } | |
207 | vinslin((vp+1)->vliny, need, l); | |
208 | if (glitched) { | |
209 | hold = oldhold; | |
210 | heldech = oldheldech; | |
211 | } | |
212 | } | |
213 | } else | |
214 | vp[1].vliny = vp[0].vliny + vp->vdepth; | |
215 | return (p + o); | |
216 | } | |
217 | ||
218 | /* | |
219 | * Insert cnt blank lines before line p, | |
220 | * logically and (if supported) physically. | |
221 | */ | |
222 | vinslin(p, cnt, l) | |
223 | register int p, cnt; | |
224 | int l; | |
225 | { | |
226 | register int i; | |
227 | bool could = 1; | |
228 | ||
229 | #ifdef ADEBUG | |
230 | if (trace) | |
231 | tfixnl(), fprintf(trace, "vinslin(%d, %d, %d)\n", p, cnt, l); | |
232 | #endif | |
233 | if (p + cnt > WBOT && CD) { | |
234 | /* | |
235 | * Really quick -- clear to end of screen. | |
236 | */ | |
237 | cnt = WECHO + 1 - p; | |
238 | vgoto(p, 0), vputp(CD, cnt); | |
239 | vclrech(1); | |
240 | vadjAL(p, cnt); | |
04379bab | 241 | } else if (SR && p == WTOP && costSR < costAL) { |
4bfebc61 MH |
242 | /* |
243 | * Use reverse scroll mode of the terminal, at | |
04379bab MH |
244 | * the top of the window. Reverse linefeed works |
245 | * too, since we only use it from line WTOP. | |
4bfebc61 MH |
246 | */ |
247 | for (i = cnt; i > 0; i--) { | |
248 | vgoto(p, 0), vputp(SR, 0); | |
249 | if (i > 1 && (hold & HOLDAT) == 0) | |
250 | putchar('@'); | |
251 | /* | |
252 | * If we are at the top of the screen, and the | |
253 | * terminal retains display above, then we | |
254 | * should try to clear to end of line. | |
255 | * Have to use CE since we don't remember what is | |
256 | * actually on the line. | |
257 | */ | |
258 | if (CE && (DA || p != 0)) | |
259 | vputp(CE, 1); | |
260 | } | |
261 | vadjAL(p, cnt); | |
04379bab MH |
262 | } else if (AL) { |
263 | /* | |
264 | * Use insert line. | |
265 | */ | |
299f2784 | 266 | vgoto(p, 0); |
17687128 MH |
267 | if (AL_PARM && (cnt>1 || *AL==0)) { |
268 | /* insert cnt lines. Should do @'s too. */ | |
269 | vputp(tgoto(AL_PARM, p, cnt), WECHO+1-p); | |
270 | } | |
271 | else if (CS && *AL==0) { | |
272 | /* vt100 change scrolling region to fake AL */ | |
273 | vputp(SC, 1); | |
274 | vputp(tgoto(CS, LINES-1,p), 1); | |
275 | vputp(RC, 1); /* CS homes stupid cursor */ | |
276 | for (i=cnt; i>0; i--) | |
277 | vputp(SR, 1); /* should do @'s */ | |
278 | vputp(tgoto(CS, LINES-1,0), 1); | |
279 | vputp(RC, 1); /* Once again put it back */ | |
280 | } | |
281 | else { | |
299f2784 | 282 | vputp(AL, WECHO + 1 - p); |
17687128 MH |
283 | for (i = cnt - 1; i > 0; i--) { |
284 | vgoto(outline+1, 0); | |
299f2784 | 285 | vputp(AL, WECHO + 1 - outline); |
17687128 MH |
286 | if ((hold & HOLDAT) == 0) |
287 | putchar('@'); | |
288 | } | |
04379bab MH |
289 | } |
290 | vadjAL(p, cnt); | |
4bfebc61 MH |
291 | } else |
292 | could = 0; | |
293 | vopenup(cnt, could, l); | |
294 | } | |
295 | ||
296 | /* | |
297 | * Logically open up after line l, cnt of them. | |
298 | * We need to know if it was done ``physically'' since in this | |
299 | * case we accept what the hardware gives us. If we have to do | |
300 | * it ourselves (brute force) we will squish out @ lines in the process | |
301 | * if this will save us work. | |
302 | */ | |
303 | vopenup(cnt, could, l) | |
304 | int cnt; | |
305 | bool could; | |
306 | { | |
307 | register struct vlinfo *vc = &vlinfo[l + 1]; | |
308 | register struct vlinfo *ve = &vlinfo[vcnt]; | |
309 | ||
310 | #ifdef ADEBUG | |
311 | if (trace) | |
312 | tfixnl(), fprintf(trace, "vopenup(%d, %d, %d)\n", cnt, could, l); | |
313 | #endif | |
314 | if (could) | |
315 | /* | |
316 | * This will push @ lines down the screen, | |
317 | * just as the hardware did. Since the default | |
318 | * for intelligent terminals is to never have @ | |
319 | * lines on the screen, this should never happen, | |
320 | * and the code makes no special effort to be nice in this | |
321 | * case, e.g. squishing out the @ lines by delete lines | |
322 | * before doing append lines. | |
323 | */ | |
324 | for (; vc <= ve; vc++) | |
325 | vc->vliny += cnt; | |
326 | else { | |
327 | /* | |
328 | * Will have to clean up brute force eventually, | |
329 | * so push the line data around as little as possible. | |
330 | */ | |
331 | vc->vliny += cnt, vc->vflags |= VDIRT; | |
332 | while (vc < ve) { | |
333 | register int i = vc->vliny + vc->vdepth; | |
334 | ||
335 | vc++; | |
336 | if (i <= vc->vliny) | |
337 | break; | |
338 | vc->vliny = i, vc->vflags |= VDIRT; | |
339 | } | |
340 | } | |
341 | vscrap(); | |
342 | } | |
343 | ||
344 | /* | |
345 | * Adjust data structure internally to account for insertion of | |
346 | * blank lines on the screen. | |
347 | */ | |
348 | vadjAL(p, cnt) | |
349 | int p, cnt; | |
350 | { | |
351 | char *tlines[TUBELINES]; | |
352 | register int from, to; | |
353 | ||
354 | #ifdef ADEBUG | |
355 | if (trace) | |
356 | tfixnl(), fprintf(trace, "vadjal(%d, %d)\n", p, cnt); | |
357 | #endif | |
358 | copy(tlines, vtube, sizeof vtube); /*SASSIGN*/ | |
359 | for (from = p, to = p + cnt; to <= WECHO; from++, to++) | |
360 | vtube[to] = tlines[from]; | |
361 | for (to = p; from <= WECHO; from++, to++) { | |
362 | vtube[to] = tlines[from]; | |
363 | vclrbyte(vtube[to], WCOLS); | |
364 | } | |
365 | /* | |
366 | * Have to clear the echo area since its contents aren't | |
367 | * necessarily consistent with the rest of the display. | |
368 | */ | |
369 | vclrech(0); | |
370 | } | |
371 | ||
372 | /* | |
373 | * Roll the screen up logically and physically | |
374 | * so that line dl is the bottom line on the screen. | |
375 | */ | |
376 | vrollup(dl) | |
377 | int dl; | |
378 | { | |
379 | register int cnt; | |
380 | register int dc = destcol; | |
381 | ||
382 | #ifdef ADEBUG | |
383 | if (trace) | |
384 | tfixnl(), fprintf(trace, "vrollup(%d)\n", dl); | |
385 | #endif | |
386 | cnt = dl - (splitw ? WECHO : WBOT); | |
387 | if (splitw && (state == VISUAL || state == CRTOPEN)) | |
388 | holdupd = 1; | |
4bfebc61 | 389 | vmoveitup(cnt, 1); |
d266c416 | 390 | vscroll(cnt); |
4bfebc61 MH |
391 | destline = dl - cnt, destcol = dc; |
392 | } | |
393 | ||
394 | vup1() | |
395 | { | |
396 | ||
397 | vrollup(WBOT + 1); | |
398 | } | |
399 | ||
400 | /* | |
401 | * Scroll the screen up cnt lines physically. | |
402 | * If doclr is true, do a clear eol if the terminal | |
403 | * has standout (to prevent it from scrolling up) | |
404 | */ | |
405 | vmoveitup(cnt, doclr) | |
406 | register int cnt; | |
407 | bool doclr; | |
408 | { | |
409 | ||
410 | if (cnt == 0) | |
411 | return; | |
412 | #ifdef ADEBUG | |
413 | if (trace) | |
414 | tfixnl(), fprintf(trace, "vmoveitup(%d)\n", cnt); | |
415 | #endif | |
416 | if (doclr && (SO || SE)) | |
417 | vclrech(0); | |
418 | if (SF) { | |
9943bf55 MH |
419 | destline = WECHO; |
420 | destcol = (NONL ? 0 : outcol % WCOLS); | |
421 | fgoto(); | |
4bfebc61 MH |
422 | while (cnt > 0) |
423 | vputp(SF, 0), cnt--; | |
424 | return; | |
425 | } | |
426 | destline = WECHO + cnt; | |
427 | destcol = (NONL ? 0 : outcol % WCOLS); | |
428 | fgoto(); | |
429 | if (state == ONEOPEN || state == HARDOPEN) { | |
430 | outline = destline = 0; | |
431 | vclrbyte(vtube[0], WCOLS); | |
432 | } | |
433 | } | |
434 | ||
435 | /* | |
436 | * Scroll the screen up cnt lines logically. | |
437 | */ | |
438 | vscroll(cnt) | |
439 | register int cnt; | |
440 | { | |
441 | register int from, to; | |
442 | char *tlines[TUBELINES]; | |
443 | ||
444 | #ifdef ADEBUG | |
445 | if (trace) | |
446 | fprintf(trace, "vscroll(%d)\n", cnt); | |
447 | #endif | |
448 | if (cnt < 0 || cnt > TUBELINES) | |
449 | error("Internal error: vscroll"); | |
450 | if (cnt == 0) | |
451 | return; | |
452 | copy(tlines, vtube, sizeof vtube); | |
453 | for (to = ZERO, from = ZERO + cnt; to <= WECHO - cnt; to++, from++) | |
454 | vtube[to] = tlines[from]; | |
455 | for (from = ZERO; to <= WECHO; to++, from++) { | |
456 | vtube[to] = tlines[from]; | |
457 | vclrbyte(vtube[to], WCOLS); | |
458 | } | |
459 | for (from = 0; from <= vcnt; from++) | |
460 | LINE(from) -= cnt; | |
461 | } | |
462 | ||
463 | /* | |
464 | * Discard logical lines due to physical wandering off the screen. | |
465 | */ | |
466 | vscrap() | |
467 | { | |
468 | register int i, j; | |
469 | ||
470 | #ifdef ADEBUG | |
471 | if (trace) | |
472 | tfixnl(), fprintf(trace, "vscrap\n"), tvliny(); | |
473 | #endif | |
474 | if (splitw) | |
475 | return; | |
476 | if (vcnt && WBOT != WECHO && LINE(0) < WTOP && LINE(0) >= ZERO) { | |
477 | WTOP = LINE(0); | |
478 | WLINES = WBOT - WTOP + 1; | |
479 | } | |
480 | for (j = 0; j < vcnt; j++) | |
481 | if (LINE(j) >= WTOP) { | |
482 | if (j == 0) | |
483 | break; | |
484 | /* | |
485 | * Discard the first j physical lines off the top. | |
486 | */ | |
487 | vcnt -= j, vcline -= j; | |
488 | for (i = 0; i <= vcnt; i++) | |
489 | vlcopy(vlinfo[i], vlinfo[i + j]); | |
490 | break; | |
491 | } | |
492 | /* | |
493 | * Discard lines off the bottom. | |
494 | */ | |
495 | if (vcnt) { | |
496 | for (j = 0; j <= vcnt; j++) | |
497 | if (LINE(j) > WBOT || LINE(j) + DEPTH(j) - 1 > WBOT) { | |
498 | vcnt = j; | |
499 | break; | |
500 | } | |
501 | LASTLINE = LINE(vcnt-1) + DEPTH(vcnt-1); | |
502 | } | |
503 | #ifdef ADEBUG | |
504 | if (trace) | |
505 | tvliny(); | |
506 | #endif | |
507 | /* | |
508 | * May have no lines! | |
509 | */ | |
510 | } | |
511 | ||
512 | /* | |
513 | * Repaint the screen, with cursor at curs, aftern an arbitrary change. | |
514 | * Handle notification on large changes. | |
515 | */ | |
516 | vrepaint(curs) | |
517 | char *curs; | |
518 | { | |
519 | ||
520 | wdot = NOLINE; | |
521 | /* | |
522 | * In open want to notify first. | |
523 | */ | |
524 | noteit(0); | |
525 | vscrap(); | |
526 | ||
527 | /* | |
528 | * Deal with a totally useless display. | |
529 | */ | |
530 | if (vcnt == 0 || vcline < 0 || vcline > vcnt || holdupd && state != VISUAL) { | |
531 | register line *odol = dol; | |
532 | ||
533 | vcnt = 0; | |
534 | if (holdupd) | |
535 | if (state == VISUAL) | |
536 | ignore(peekkey()); | |
537 | else | |
538 | vup1(); | |
539 | holdupd = 0; | |
540 | if (odol == zero) | |
541 | fixzero(); | |
542 | vcontext(dot, '.'); | |
543 | noteit(1); | |
544 | if (noteit(1) == 0 && odol == zero) { | |
545 | CATCH | |
546 | error("No lines in buffer"); | |
547 | ENDCATCH | |
548 | linebuf[0] = 0; | |
549 | splitw = 0; | |
550 | } | |
551 | vnline(curs); | |
552 | return; | |
553 | } | |
554 | ||
555 | /* | |
556 | * Have some useful displayed text; refresh it. | |
557 | */ | |
558 | getDOT(); | |
559 | ||
560 | /* | |
561 | * This is for boundary conditions in open mode. | |
562 | */ | |
563 | if (FLAGS(0) & VDIRT) | |
564 | vsync(WTOP); | |
565 | ||
566 | /* | |
567 | * If the current line is after the last displayed line | |
568 | * or the bottom of the screen, then special effort is needed | |
569 | * to get it on the screen. We first try a redraw at the | |
570 | * last line on the screen, hoping it will fill in where @ | |
571 | * lines are now. If this doesn't work, then roll it onto | |
572 | * the screen. | |
573 | */ | |
574 | if (vcline >= vcnt || LINE(vcline) > WBOT) { | |
575 | short oldhold = hold; | |
576 | hold |= HOLDAT, vredraw(LASTLINE), hold = oldhold; | |
577 | if (vcline >= vcnt) { | |
578 | register int i = vcline - vcnt + 1; | |
579 | ||
580 | dot -= i; | |
581 | vcline -= i; | |
582 | vroll(i); | |
583 | } else | |
584 | vsyncCL(); | |
585 | } else | |
586 | vsync(vcline > 0 ? LINE(vcline - 1) : WTOP); | |
587 | ||
588 | /* | |
589 | * Notification on large change for visual | |
590 | * has to be done last or we may lose | |
591 | * the echo area with redisplay. | |
592 | */ | |
593 | noteit(1); | |
594 | ||
595 | /* | |
596 | * Finally. Move the cursor onto the current line. | |
597 | */ | |
598 | vnline(curs); | |
599 | } | |
600 | ||
601 | /* | |
602 | * Fully cleanup the screen, leaving no @ lines except at end when | |
603 | * line after last won't completely fit. The routine vsync is | |
604 | * more conservative and much less work on dumb terminals. | |
605 | */ | |
606 | vredraw(p) | |
607 | register int p; | |
608 | { | |
609 | register int l; | |
610 | register line *tp; | |
611 | char temp[LBSIZE]; | |
612 | bool anydl = 0; | |
613 | short oldhold = hold; | |
614 | ||
615 | #ifdef ADEBUG | |
616 | if (trace) | |
617 | tfixnl(), fprintf(trace, "vredraw(%d)\n", p), tvliny(); | |
618 | #endif | |
619 | if (holdupd) { | |
620 | holdupd = 3; | |
621 | return; | |
622 | } | |
623 | if (state == HARDOPEN || splitw) | |
624 | return; | |
625 | if (p < 0 /* || p > WECHO */) | |
626 | error("Internal error: vredraw"); | |
627 | ||
628 | /* | |
629 | * Trim the ragged edges (lines which are off the screen but | |
630 | * not yet logically discarded), save the current line, and | |
631 | * search for first logical line affected by the redraw. | |
632 | */ | |
633 | vscrap(); | |
634 | CP(temp, linebuf); | |
635 | l = 0; | |
636 | tp = dot - vcline; | |
637 | if (vcnt == 0) | |
638 | LINE(0) = WTOP; | |
639 | while (l < vcnt && LINE(l) < p) | |
640 | l++, tp++; | |
641 | ||
642 | /* | |
643 | * We hold off echo area clearing during the redraw in deference | |
644 | * to a final clear of the echo area at the end if appropriate. | |
645 | */ | |
646 | heldech = 0; | |
647 | hold |= HOLDECH; | |
648 | for (; l < vcnt && Peekkey != ATTN; l++) { | |
649 | if (l == vcline) | |
650 | strcLIN(temp); | |
651 | else | |
652 | getline(*tp); | |
653 | ||
654 | /* | |
655 | * Delete junk between displayed lines. | |
656 | */ | |
657 | if (LINE(l) != LINE(l + 1) && LINE(l) != p) { | |
658 | if (anydl == 0 && DB && CD) { | |
659 | hold = oldhold; | |
660 | vclrech(0); | |
661 | anydl = 1; | |
662 | hold |= HOLDECH; | |
663 | heldech = 0; | |
664 | } | |
665 | vdellin(p, LINE(l) - p, l); | |
666 | } | |
667 | ||
668 | /* | |
669 | * If line image is not know to be up to date, then | |
670 | * redisplay it; else just skip onward. | |
671 | */ | |
672 | LINE(l) = p; | |
673 | if (FLAGS(l) & VDIRT) { | |
674 | DEPTH(l) = vdepth(); | |
675 | if (l != vcline && p + DEPTH(l) - 1 > WBOT) { | |
676 | vscrap(); | |
677 | break; | |
678 | } | |
679 | FLAGS(l) &= ~VDIRT; | |
680 | vreopen(p, lineno(tp), l); | |
681 | p = LINE(l) + DEPTH(l); | |
682 | } else | |
683 | p += DEPTH(l); | |
684 | tp++; | |
685 | } | |
686 | ||
687 | /* | |
688 | * That takes care of lines which were already partially displayed. | |
689 | * Now try to fill the rest of the screen with text. | |
690 | */ | |
691 | if (state == VISUAL && p <= WBOT) { | |
692 | int ovcline = vcline; | |
693 | ||
694 | vcline = l; | |
695 | for (; tp <= dol && Peekkey != ATTN; tp++) { | |
696 | getline(*tp); | |
697 | if (p + vdepth() - 1 > WBOT) | |
698 | break; | |
699 | vopen(tp, p); | |
700 | p += DEPTH(vcline); | |
701 | vcline++; | |
702 | } | |
703 | vcline = ovcline; | |
704 | } | |
705 | ||
706 | /* | |
707 | * Thats all the text we can get on. | |
708 | * Now rest of lines (if any) get either a ~ if they | |
709 | * are past end of file, or an @ if the next line won't fit. | |
710 | */ | |
711 | for (; p <= WBOT && Peekkey != ATTN; p++) | |
712 | vclrlin(p, tp); | |
713 | strcLIN(temp); | |
714 | hold = oldhold; | |
715 | if (heldech) | |
716 | vclrech(0); | |
717 | #ifdef ADEBUG | |
718 | if (trace) | |
719 | tvliny(); | |
720 | #endif | |
721 | } | |
722 | ||
723 | /* | |
724 | * Do the real work in deleting cnt lines starting at line p from | |
725 | * the display. First affected line is line l. | |
726 | */ | |
727 | vdellin(p, cnt, l) | |
728 | int p, cnt, l; | |
729 | { | |
730 | register int i; | |
731 | ||
732 | if (cnt == 0) | |
733 | return; | |
734 | if (DL == NOSTR || cnt < 0) { | |
735 | /* | |
736 | * Can't do it; just remember that line l is munged. | |
737 | */ | |
738 | FLAGS(l) |= VDIRT; | |
739 | return; | |
740 | } | |
741 | #ifdef ADEBUG | |
742 | if (trace) | |
743 | tfixnl(), fprintf(trace, "vdellin(%d, %d, %d)\n", p, cnt, l); | |
744 | #endif | |
745 | /* | |
746 | * Send the deletes to the screen and then adjust logical | |
747 | * and physical internal data structures. | |
748 | */ | |
749 | vgoto(p, 0); | |
17687128 MH |
750 | if (DL_PARM && (cnt>1 || *DL==0)) { |
751 | vputp(tgoto(DL_PARM, p, cnt), WECHO-p); | |
752 | } | |
753 | else if (CS && *DL==0) { | |
754 | /* vt100: fake DL by changing scrolling region */ | |
755 | vputp(SC, 1); /* Save since CS homes stupid cursor */ | |
756 | vputp(tgoto(CS, LINES-1, p), 1); | |
526d8a20 | 757 | vputp(tgoto(CM, 0, LINES-1), 1);/* Go to lower left corner */ |
17687128 | 758 | for (i=0; i<cnt; i++) /* .. and scroll cnt times */ |
f642eebc | 759 | putch('\n'); /* should check NL too */ |
17687128 MH |
760 | vputp(tgoto(CS, LINES-1, 0), 1);/* restore scrolling region */ |
761 | vputp(RC, 1); /* put cursor back */ | |
762 | } | |
763 | else { | |
764 | for (i = 0; i < cnt; i++) | |
299f2784 | 765 | vputp(DL, WECHO - p); |
17687128 | 766 | } |
4bfebc61 MH |
767 | vadjDL(p, cnt); |
768 | vcloseup(l, cnt); | |
769 | } | |
770 | /* | |
771 | * Adjust internal physical screen image to account for deleted lines. | |
772 | */ | |
773 | vadjDL(p, cnt) | |
774 | int p, cnt; | |
775 | { | |
776 | char *tlines[TUBELINES]; | |
777 | register int from, to; | |
778 | ||
779 | #ifdef ADEBUG | |
780 | if (trace) | |
781 | tfixnl(), fprintf(trace, "vadjDL(%d, %d)\n", p, cnt); | |
782 | #endif | |
783 | /* | |
784 | * Would like to use structured assignment but early | |
785 | * v7 compiler (released with phototypesetter for v6) | |
786 | * can't hack it. | |
787 | */ | |
788 | copy(tlines, vtube, sizeof vtube); /*SASSIGN*/ | |
789 | for (from = p + cnt, to = p; from <= WECHO; from++, to++) | |
790 | vtube[to] = tlines[from]; | |
791 | for (from = p; to <= WECHO; from++, to++) { | |
792 | vtube[to] = tlines[from]; | |
793 | vclrbyte(vtube[to], WCOLS); | |
794 | } | |
795 | } | |
796 | /* | |
797 | * Sync the screen, like redraw but more lazy and willing to leave | |
798 | * @ lines on the screen. VsyncCL syncs starting at the current line. | |
799 | * In any case, if the redraw option is set then all syncs map to redraws | |
800 | * as if vsync didn't exist. | |
801 | */ | |
802 | vsyncCL() | |
803 | { | |
804 | ||
805 | vsync(LINE(vcline)); | |
806 | } | |
807 | ||
808 | vsync(p) | |
809 | register int p; | |
810 | { | |
811 | ||
812 | if (value(REDRAW)) | |
813 | vredraw(p); | |
814 | else | |
815 | vsync1(p); | |
816 | } | |
817 | ||
818 | /* | |
819 | * The guts of a sync. Similar to redraw but | |
820 | * just less ambitous. | |
821 | */ | |
822 | vsync1(p) | |
823 | register int p; | |
824 | { | |
825 | register int l; | |
826 | char temp[LBSIZE]; | |
827 | register struct vlinfo *vp = &vlinfo[0]; | |
828 | short oldhold = hold; | |
829 | ||
830 | #ifdef ADEBUG | |
831 | if (trace) | |
832 | tfixnl(), fprintf(trace, "vsync1(%d)\n", p), tvliny(); | |
833 | #endif | |
834 | if (holdupd) { | |
835 | if (holdupd < 3) | |
836 | holdupd = 2; | |
837 | return; | |
838 | } | |
839 | if (state == HARDOPEN || splitw) | |
840 | return; | |
841 | vscrap(); | |
842 | CP(temp, linebuf); | |
843 | if (vcnt == 0) | |
844 | LINE(0) = WTOP; | |
845 | l = 0; | |
846 | while (l < vcnt && vp->vliny < p) | |
847 | l++, vp++; | |
848 | heldech = 0; | |
849 | hold |= HOLDECH; | |
850 | while (p <= WBOT && Peekkey != ATTN) { | |
851 | /* | |
852 | * Want to put a line here if not in visual and first line | |
853 | * or if there are lies left and this line starts before | |
854 | * the current line, or if this line is piled under the | |
855 | * next line (vreplace does this and we undo it). | |
856 | */ | |
857 | if (l == 0 && state != VISUAL || | |
858 | (l < vcnt && (vp->vliny <= p || vp[0].vliny == vp[1].vliny))) { | |
859 | if (l == 0 || vp->vliny < p || (vp->vflags & VDIRT)) { | |
860 | if (l == vcline) | |
861 | strcLIN(temp); | |
862 | else | |
863 | getline(dot[l - vcline]); | |
864 | /* | |
865 | * Be careful that a long line doesn't cause the | |
866 | * screen to shoot up. | |
867 | */ | |
868 | if (l != vcline && (vp->vflags & VDIRT)) { | |
869 | vp->vdepth = vdepth(); | |
870 | vp->vflags &= ~VDIRT; | |
871 | if (p + vp->vdepth - 1 > WBOT) | |
872 | break; | |
873 | } | |
874 | vreopen(p, lineDOT() + (l - vcline), l); | |
875 | } | |
876 | p = vp->vliny + vp->vdepth; | |
877 | vp++; | |
878 | l++; | |
879 | } else | |
880 | /* | |
881 | * A physical line between logical lines, | |
882 | * so we settle for an @ at the beginning. | |
883 | */ | |
884 | vclrlin(p, dot + (l - vcline)), p++; | |
885 | } | |
886 | strcLIN(temp); | |
887 | hold = oldhold; | |
888 | if (heldech) | |
889 | vclrech(0); | |
890 | } | |
891 | ||
892 | /* | |
893 | * Subtract (logically) cnt physical lines from the | |
894 | * displayed position of lines starting with line l. | |
895 | */ | |
896 | vcloseup(l, cnt) | |
897 | int l; | |
898 | register int cnt; | |
899 | { | |
900 | register int i; | |
901 | ||
902 | #ifdef ADEBUG | |
903 | if (trace) | |
904 | tfixnl(), fprintf(trace, "vcloseup(%d, %d)\n", l, cnt); | |
905 | #endif | |
906 | for (i = l + 1; i <= vcnt; i++) | |
907 | LINE(i) -= cnt; | |
908 | } | |
909 | ||
910 | /* | |
911 | * Workhorse for rearranging line descriptors on changes. | |
912 | * The idea here is that, starting with line l, cnt lines | |
913 | * have been replaced with newcnt lines. All of these may | |
914 | * be ridiculous, i.e. l may be -1000, cnt 50 and newcnt 0, | |
915 | * since we may be called from an undo after the screen has | |
916 | * moved a lot. Thus we have to be careful. | |
917 | * | |
918 | * Many boundary conditions here. | |
919 | */ | |
920 | vreplace(l, cnt, newcnt) | |
921 | int l, cnt, newcnt; | |
922 | { | |
923 | register int from, to, i; | |
924 | bool savenote = 0; | |
925 | ||
926 | #ifdef ADEBUG | |
927 | if (trace) { | |
928 | tfixnl(), fprintf(trace, "vreplace(%d, %d, %d)\n", l, cnt, newcnt); | |
929 | tvliny(); | |
930 | } | |
931 | #endif | |
932 | if (l >= vcnt) | |
933 | return; | |
934 | if (l < 0) { | |
935 | if (l + cnt < 0) { | |
936 | /* | |
937 | * Nothing on the screen is relevant. | |
938 | * Settle for redrawing from scratch (later). | |
939 | */ | |
940 | vcnt = 0; | |
941 | return; | |
942 | } | |
943 | /* | |
944 | * Normalize l to top of screen; the add is | |
945 | * really a subtract from cnt since l is negative. | |
946 | */ | |
947 | cnt += l; | |
948 | l = 0; | |
949 | ||
950 | /* | |
951 | * Unseen lines were affect so notify (later). | |
952 | */ | |
953 | savenote++; | |
954 | } | |
955 | ||
956 | /* | |
957 | * These shouldn't happen | |
958 | * but would cause great havoc. | |
959 | */ | |
960 | if (cnt < 0) | |
961 | cnt = 0; | |
962 | if (newcnt < 0) | |
963 | newcnt = 0; | |
964 | ||
965 | /* | |
966 | * Surely worthy of note if more than report | |
967 | * lines were changed. | |
968 | */ | |
969 | if (cnt > value(REPORT) || newcnt > value(REPORT)) | |
970 | savenote++; | |
971 | ||
972 | /* | |
973 | * Same number of lines affeted as on screen, and we | |
974 | * can insert and delete lines. Thus we just type | |
975 | * over them, since otherwise we will push them | |
976 | * slowly off the screen, a clear lose. | |
977 | */ | |
978 | if (cnt == newcnt || vcnt - l == newcnt && AL && DL) { | |
979 | if (cnt > 1 && l + cnt > vcnt) | |
980 | savenote++; | |
981 | vdirty(l, newcnt); | |
982 | } else { | |
983 | /* | |
984 | * Lines are going away, squish them out. | |
985 | */ | |
986 | if (cnt > 0) { | |
987 | /* | |
988 | * If non-displayed lines went away, | |
989 | * always notify. | |
990 | */ | |
991 | if (cnt > 1 && l + cnt > vcnt) | |
992 | savenote++; | |
993 | if (l + cnt >= vcnt) | |
994 | cnt = vcnt - l; | |
995 | else | |
996 | for (from = l + cnt, to = l; from <= vcnt; to++, from++) | |
997 | vlcopy(vlinfo[to], vlinfo[from]); | |
998 | vcnt -= cnt; | |
999 | } | |
1000 | /* | |
1001 | * Open up space for new lines appearing. | |
1002 | * All new lines are piled in the same place, | |
1003 | * and will be unpiled by vredraw/vsync, which | |
1004 | * inserts lines in front as it unpiles. | |
1005 | */ | |
1006 | if (newcnt > 0) { | |
1007 | /* | |
1008 | * Newlines are appearing which may not show, | |
1009 | * so notify (this is only approximately correct | |
1010 | * when long lines are present). | |
1011 | */ | |
1012 | if (newcnt > 1 && l + newcnt > vcnt + 1) | |
1013 | savenote++; | |
1014 | ||
1015 | /* | |
1016 | * If there will be more lines than fit, then | |
1017 | * just throw way the rest of the stuff on the screen. | |
1018 | */ | |
1019 | if (l + newcnt > WBOT && AL && DL) { | |
1020 | vcnt = l; | |
1021 | goto skip; | |
1022 | } | |
1023 | from = vcnt, to = vcnt + newcnt; | |
1024 | i = TUBELINES - to; | |
1025 | if (i < 0) | |
1026 | from += i, to += i; | |
1027 | vcnt = to; | |
1028 | for (; from >= l; from--, to--) | |
1029 | vlcopy(vlinfo[to], vlinfo[from]); | |
1030 | for (from = to + 1, to = l; to < l + newcnt && to <= WBOT + 1; to++) { | |
1031 | LINE(to) = LINE(from); | |
1032 | DEPTH(to) = 0; | |
1033 | FLAGS(to) = VDIRT; | |
1034 | } | |
1035 | } | |
1036 | } | |
1037 | skip: | |
1038 | if (Pline == numbline && cnt != newcnt) | |
1039 | /* | |
1040 | * When lines positions are shifted, the numbers | |
1041 | * will be wrong. | |
1042 | */ | |
1043 | vdirty(l, WECHO); | |
1044 | if (!savenote) | |
1045 | notecnt = 0; | |
1046 | #ifdef ADEBUG | |
1047 | if (trace) | |
1048 | tvliny(); | |
1049 | #endif | |
1050 | } | |
1051 | ||
1052 | /* | |
1053 | * Start harcopy open. | |
1054 | * Print an image of the line to the left of the cursor | |
1055 | * under the full print of the line and position the cursor. | |
1056 | * If we are in a scroll ^D within hardcopy open then all this | |
1057 | * is suppressed. | |
1058 | */ | |
1059 | sethard() | |
1060 | { | |
1061 | ||
1062 | if (state == VISUAL) | |
1063 | return; | |
1064 | rubble = 0; | |
1065 | state = HARDOPEN; | |
1066 | if (hold & HOLDROL) | |
1067 | return; | |
1068 | vup1(); | |
1069 | LINE(0) = WBOT; | |
1070 | if (Pline == numbline) | |
1071 | vgoto(WBOT, 0), printf("%6d ", lineDOT()); | |
1072 | } | |
1073 | ||
1074 | /* | |
1075 | * Mark the lines starting at base for i lines | |
1076 | * as dirty so that they will be checked for correct | |
1077 | * display at next sync/redraw. | |
1078 | */ | |
1079 | vdirty(base, i) | |
1080 | register int base, i; | |
1081 | { | |
1082 | register int l; | |
1083 | ||
1084 | for (l = base; l < vcnt; l++) { | |
1085 | if (--i < 0) | |
1086 | return; | |
1087 | FLAGS(l) |= VDIRT; | |
1088 | } | |
1089 | } |