Commit | Line | Data |
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7c4625ef | 1 | /* Copyright (c) 1980 Regents of the University of California */ |
b41bbcb5 | 2 | static char *sccsid = "@(#)ex_vadj.c 5.1 %G%"; |
4bfebc61 MH |
3 | #include "ex.h" |
4 | #include "ex_tty.h" | |
5 | #include "ex_vis.h" | |
6 | ||
7 | /* | |
8 | * Routines to deal with management of logical versus physical | |
9 | * display, opening and redisplaying lines on the screen, and | |
10 | * use of intelligent terminal operations. Routines to deal with | |
11 | * screen cleanup after a change. | |
12 | */ | |
13 | ||
14 | /* | |
15 | * Display a new line at physical line p, returning | |
16 | * the depth of the newly displayed line. We may decide | |
17 | * to expand the window on an intelligent terminal if it is | |
18 | * less than a full screen by deleting a line above the top of the | |
19 | * window before doing an insert line to keep all the good text | |
20 | * on the screen in which case the line may actually end up | |
21 | * somewhere other than line p. | |
22 | */ | |
23 | vopen(tp, p) | |
24 | line *tp; | |
25 | int p; | |
26 | { | |
27 | register int cnt; | |
28 | register struct vlinfo *vp, *vpc; | |
29 | ||
30 | #ifdef ADEBUG | |
31 | if (trace != NULL) | |
32 | tfixnl(), fprintf(trace, "vopen(%d, %d)\n", lineno(tp), p); | |
33 | #endif | |
34 | if (state != VISUAL) { | |
35 | if (vcnt) | |
36 | if (hold & HOLDROL) | |
37 | vup1(); | |
38 | else | |
39 | vclean(); | |
40 | ||
41 | /* | |
42 | * Forget all that we once knew. | |
43 | */ | |
44 | vcnt = vcline = 0; | |
45 | p = WBOT; LASTLINE = WBOT + 1; | |
46 | state = bastate; | |
47 | WTOP = basWTOP; | |
48 | WLINES = basWLINES; | |
49 | } | |
50 | vpc = &vlinfo[vcline]; | |
51 | for (vp = &vlinfo[vcnt]; vp >= vpc; vp--) | |
52 | vlcopy(vp[1], vp[0]); | |
53 | vcnt++; | |
54 | if (Pline == numbline) | |
55 | /* | |
56 | * Dirtying all the lines is rather inefficient | |
57 | * internally, but number mode is used rarely | |
58 | * and so its not worth optimizing. | |
59 | */ | |
60 | vdirty(vcline+1, WECHO); | |
61 | getline(*tp); | |
62 | ||
63 | /* | |
64 | * If we are opening at the top of the window, can try a window | |
65 | * expansion at the top. | |
66 | */ | |
67 | if (state == VISUAL && vcline == 0 && vcnt > 1 && p > ZERO) { | |
68 | cnt = p + vdepth() - LINE(1); | |
69 | if (cnt > 0) { | |
70 | p -= cnt; | |
71 | if (p < ZERO) | |
72 | p = ZERO; | |
73 | WTOP = p; | |
74 | WLINES = WBOT - WTOP + 1; | |
75 | } | |
76 | } | |
77 | vpc->vliny = p, vpc->vdepth = 0, vpc->vflags = 0; | |
78 | cnt = vreopen(p, lineno(tp), vcline); | |
79 | if (vcline + 1 == vcnt) | |
80 | LINE(vcnt) = LINE(vcline) + cnt; | |
81 | } | |
82 | ||
83 | /* | |
84 | * Redisplay logical line l at physical line p with line number lineno. | |
85 | */ | |
86 | vreopen(p, lineno, l) | |
87 | int p, lineno, l; | |
88 | { | |
89 | register int d; | |
90 | register struct vlinfo *vp = &vlinfo[l]; | |
91 | ||
92 | #ifdef ADEBUG | |
93 | if (trace) | |
94 | tfixnl(), fprintf(trace, "vreopen(%d, %d, %d)\n", p, lineno, l); | |
95 | #endif | |
96 | d = vp->vdepth; | |
97 | if (d == 0 || (vp->vflags & VDIRT)) | |
98 | vp->vdepth = d = vdepth(); | |
99 | vp->vliny = p, vp->vflags &= ~VDIRT; | |
100 | ||
101 | /* | |
102 | * Try to win by making the screen larger rather than inserting | |
103 | * a line and driving text off the bottom. | |
104 | */ | |
105 | p = vglitchup(l, 0); | |
106 | ||
107 | /* | |
108 | * BUG: Should consider using CE here to clear to end of line. | |
109 | * As it stands we always strike over the current text. | |
110 | * Since often the current text is the same as what | |
111 | * we are overstriking with, it tends not to show. | |
112 | * On the other hand if it is different and we end up | |
113 | * spacing out a lot of text, we could have won with | |
114 | * a CE. This is probably worthwhile at low speed | |
115 | * only however, since clearly computation will be | |
116 | * necessary to determine which way to go. | |
117 | */ | |
118 | vigoto(p, 0); | |
d266c416 MH |
119 | #ifdef TRACE |
120 | if (trace) | |
121 | fprintf(trace, "before pline in vreopen\n"); | |
122 | #endif | |
4bfebc61 | 123 | pline(lineno); |
d266c416 MH |
124 | #ifdef TRACE |
125 | if (trace) | |
126 | fprintf(trace, "after pline in vreopen\n"); | |
127 | #endif | |
4bfebc61 MH |
128 | |
129 | /* | |
130 | * When we are typing part of a line for hardcopy open, don't | |
131 | * want to type the '$' marking an end of line if in list mode. | |
132 | */ | |
133 | if (hold & HOLDDOL) | |
134 | return (d); | |
135 | if (Putchar == listchar) | |
136 | putchar('$'); | |
137 | ||
138 | /* | |
139 | * Optimization of cursor motion may prevent screen rollup if the | |
140 | * line has blanks/tabs at the end unless we force the cursor to appear | |
141 | * on the last line segment. | |
142 | */ | |
143 | if (vp->vliny + d - 1 > WBOT) | |
144 | vcsync(); | |
145 | ||
146 | /* | |
147 | * Switch into hardcopy open mode if we are in one line (adm3) | |
148 | * open mode and this line is now too long. If in hardcopy | |
149 | * open mode, then call sethard to move onto the next line | |
150 | * with appropriate positioning. | |
151 | */ | |
152 | if (state == ONEOPEN) { | |
153 | WCOLS = OCOLUMNS; | |
154 | if (vdepth() > 1) { | |
155 | WCOLS = TUBECOLS; | |
156 | sethard(); | |
157 | } else | |
158 | WCOLS = TUBECOLS; | |
159 | } else if (state == HARDOPEN) | |
160 | sethard(); | |
161 | ||
162 | /* | |
163 | * Unless we filled (completely) the last line we typed on, | |
164 | * we have to clear to the end of the line | |
165 | * in case stuff is left from before. | |
166 | */ | |
167 | if (vp->vliny + d > destline) { | |
168 | if (IN && destcol == WCOLS) | |
169 | vigoto(vp->vliny + d - 1, 0); | |
170 | vclreol(); | |
171 | } | |
172 | return (d); | |
173 | } | |
174 | ||
175 | /* | |
176 | * Real work for winning growing of window at top | |
177 | * when inserting in the middle of a partially full | |
178 | * screen on an intelligent terminal. We have as argument | |
179 | * the logical line number to be inserted after, and the offset | |
180 | * from that line where the insert will go. | |
181 | * We look at the picture of depths and positions, and if we can | |
182 | * delete some (blank) lines from the top of the screen so that | |
183 | * later inserts will not push stuff off the bottom. | |
184 | */ | |
185 | vglitchup(l, o) | |
186 | int l, o; | |
187 | { | |
188 | register struct vlinfo *vp = &vlinfo[l]; | |
189 | register int need; | |
190 | register int p = vp->vliny; | |
191 | short oldhold, oldheldech; | |
192 | bool glitched = 0; | |
193 | ||
194 | if (l < vcnt - 1) { | |
195 | need = p + vp->vdepth - (vp+1)->vliny; | |
196 | if (need > 0) { | |
197 | if (state == VISUAL && WTOP - ZERO >= need && AL && DL) { | |
198 | glitched++; | |
199 | WTOP -= need; | |
200 | WLINES = WBOT - WTOP + 1; | |
201 | p -= need; | |
202 | if (p + o == WTOP) { | |
203 | vp->vliny = WTOP; | |
204 | return (WTOP + o); | |
205 | } | |
206 | vdellin(WTOP, need, -1); | |
207 | oldheldech = heldech; | |
208 | oldhold = hold; | |
209 | hold |= HOLDECH; | |
210 | } | |
211 | vinslin((vp+1)->vliny, need, l); | |
212 | if (glitched) { | |
213 | hold = oldhold; | |
214 | heldech = oldheldech; | |
215 | } | |
216 | } | |
217 | } else | |
218 | vp[1].vliny = vp[0].vliny + vp->vdepth; | |
219 | return (p + o); | |
220 | } | |
221 | ||
222 | /* | |
223 | * Insert cnt blank lines before line p, | |
224 | * logically and (if supported) physically. | |
225 | */ | |
226 | vinslin(p, cnt, l) | |
227 | register int p, cnt; | |
228 | int l; | |
229 | { | |
230 | register int i; | |
231 | bool could = 1; | |
232 | ||
233 | #ifdef ADEBUG | |
234 | if (trace) | |
235 | tfixnl(), fprintf(trace, "vinslin(%d, %d, %d)\n", p, cnt, l); | |
236 | #endif | |
237 | if (p + cnt > WBOT && CD) { | |
238 | /* | |
239 | * Really quick -- clear to end of screen. | |
240 | */ | |
241 | cnt = WECHO + 1 - p; | |
242 | vgoto(p, 0), vputp(CD, cnt); | |
243 | vclrech(1); | |
244 | vadjAL(p, cnt); | |
245 | } else if (AL) { | |
246 | /* | |
247 | * Use insert line. | |
248 | */ | |
249 | vgoto(p, 0), vputp(AL, WECHO + 1 - p); | |
250 | for (i = cnt - 1; i > 0; i--) { | |
251 | vgoto(outline+1, 0), vputp(AL, WECHO + 1 - outline); | |
252 | if ((hold & HOLDAT) == 0) | |
253 | putchar('@'); | |
254 | } | |
255 | vadjAL(p, cnt); | |
256 | } else if (SR && p == WTOP) { | |
257 | /* | |
258 | * Use reverse scroll mode of the terminal, at | |
259 | * the top of the window. | |
260 | */ | |
261 | for (i = cnt; i > 0; i--) { | |
262 | vgoto(p, 0), vputp(SR, 0); | |
263 | if (i > 1 && (hold & HOLDAT) == 0) | |
264 | putchar('@'); | |
265 | /* | |
266 | * If we are at the top of the screen, and the | |
267 | * terminal retains display above, then we | |
268 | * should try to clear to end of line. | |
269 | * Have to use CE since we don't remember what is | |
270 | * actually on the line. | |
271 | */ | |
272 | if (CE && (DA || p != 0)) | |
273 | vputp(CE, 1); | |
274 | } | |
275 | vadjAL(p, cnt); | |
276 | } else | |
277 | could = 0; | |
278 | vopenup(cnt, could, l); | |
279 | } | |
280 | ||
281 | /* | |
282 | * Logically open up after line l, cnt of them. | |
283 | * We need to know if it was done ``physically'' since in this | |
284 | * case we accept what the hardware gives us. If we have to do | |
285 | * it ourselves (brute force) we will squish out @ lines in the process | |
286 | * if this will save us work. | |
287 | */ | |
288 | vopenup(cnt, could, l) | |
289 | int cnt; | |
290 | bool could; | |
291 | { | |
292 | register struct vlinfo *vc = &vlinfo[l + 1]; | |
293 | register struct vlinfo *ve = &vlinfo[vcnt]; | |
294 | ||
295 | #ifdef ADEBUG | |
296 | if (trace) | |
297 | tfixnl(), fprintf(trace, "vopenup(%d, %d, %d)\n", cnt, could, l); | |
298 | #endif | |
299 | if (could) | |
300 | /* | |
301 | * This will push @ lines down the screen, | |
302 | * just as the hardware did. Since the default | |
303 | * for intelligent terminals is to never have @ | |
304 | * lines on the screen, this should never happen, | |
305 | * and the code makes no special effort to be nice in this | |
306 | * case, e.g. squishing out the @ lines by delete lines | |
307 | * before doing append lines. | |
308 | */ | |
309 | for (; vc <= ve; vc++) | |
310 | vc->vliny += cnt; | |
311 | else { | |
312 | /* | |
313 | * Will have to clean up brute force eventually, | |
314 | * so push the line data around as little as possible. | |
315 | */ | |
316 | vc->vliny += cnt, vc->vflags |= VDIRT; | |
317 | while (vc < ve) { | |
318 | register int i = vc->vliny + vc->vdepth; | |
319 | ||
320 | vc++; | |
321 | if (i <= vc->vliny) | |
322 | break; | |
323 | vc->vliny = i, vc->vflags |= VDIRT; | |
324 | } | |
325 | } | |
326 | vscrap(); | |
327 | } | |
328 | ||
329 | /* | |
330 | * Adjust data structure internally to account for insertion of | |
331 | * blank lines on the screen. | |
332 | */ | |
333 | vadjAL(p, cnt) | |
334 | int p, cnt; | |
335 | { | |
336 | char *tlines[TUBELINES]; | |
337 | register int from, to; | |
338 | ||
339 | #ifdef ADEBUG | |
340 | if (trace) | |
341 | tfixnl(), fprintf(trace, "vadjal(%d, %d)\n", p, cnt); | |
342 | #endif | |
343 | copy(tlines, vtube, sizeof vtube); /*SASSIGN*/ | |
344 | for (from = p, to = p + cnt; to <= WECHO; from++, to++) | |
345 | vtube[to] = tlines[from]; | |
346 | for (to = p; from <= WECHO; from++, to++) { | |
347 | vtube[to] = tlines[from]; | |
348 | vclrbyte(vtube[to], WCOLS); | |
349 | } | |
350 | /* | |
351 | * Have to clear the echo area since its contents aren't | |
352 | * necessarily consistent with the rest of the display. | |
353 | */ | |
354 | vclrech(0); | |
355 | } | |
356 | ||
357 | /* | |
358 | * Roll the screen up logically and physically | |
359 | * so that line dl is the bottom line on the screen. | |
360 | */ | |
361 | vrollup(dl) | |
362 | int dl; | |
363 | { | |
364 | register int cnt; | |
365 | register int dc = destcol; | |
366 | ||
367 | #ifdef ADEBUG | |
368 | if (trace) | |
369 | tfixnl(), fprintf(trace, "vrollup(%d)\n", dl); | |
370 | #endif | |
371 | cnt = dl - (splitw ? WECHO : WBOT); | |
372 | if (splitw && (state == VISUAL || state == CRTOPEN)) | |
373 | holdupd = 1; | |
4bfebc61 | 374 | vmoveitup(cnt, 1); |
d266c416 | 375 | vscroll(cnt); |
4bfebc61 MH |
376 | destline = dl - cnt, destcol = dc; |
377 | } | |
378 | ||
379 | vup1() | |
380 | { | |
381 | ||
382 | vrollup(WBOT + 1); | |
383 | } | |
384 | ||
385 | /* | |
386 | * Scroll the screen up cnt lines physically. | |
387 | * If doclr is true, do a clear eol if the terminal | |
388 | * has standout (to prevent it from scrolling up) | |
389 | */ | |
390 | vmoveitup(cnt, doclr) | |
391 | register int cnt; | |
392 | bool doclr; | |
393 | { | |
394 | ||
395 | if (cnt == 0) | |
396 | return; | |
397 | #ifdef ADEBUG | |
398 | if (trace) | |
399 | tfixnl(), fprintf(trace, "vmoveitup(%d)\n", cnt); | |
400 | #endif | |
401 | if (doclr && (SO || SE)) | |
402 | vclrech(0); | |
403 | if (SF) { | |
404 | while (cnt > 0) | |
405 | vputp(SF, 0), cnt--; | |
406 | return; | |
407 | } | |
408 | destline = WECHO + cnt; | |
409 | destcol = (NONL ? 0 : outcol % WCOLS); | |
410 | fgoto(); | |
411 | if (state == ONEOPEN || state == HARDOPEN) { | |
412 | outline = destline = 0; | |
413 | vclrbyte(vtube[0], WCOLS); | |
414 | } | |
415 | } | |
416 | ||
417 | /* | |
418 | * Scroll the screen up cnt lines logically. | |
419 | */ | |
420 | vscroll(cnt) | |
421 | register int cnt; | |
422 | { | |
423 | register int from, to; | |
424 | char *tlines[TUBELINES]; | |
425 | ||
426 | #ifdef ADEBUG | |
427 | if (trace) | |
428 | fprintf(trace, "vscroll(%d)\n", cnt); | |
429 | #endif | |
430 | if (cnt < 0 || cnt > TUBELINES) | |
431 | error("Internal error: vscroll"); | |
432 | if (cnt == 0) | |
433 | return; | |
434 | copy(tlines, vtube, sizeof vtube); | |
435 | for (to = ZERO, from = ZERO + cnt; to <= WECHO - cnt; to++, from++) | |
436 | vtube[to] = tlines[from]; | |
437 | for (from = ZERO; to <= WECHO; to++, from++) { | |
438 | vtube[to] = tlines[from]; | |
439 | vclrbyte(vtube[to], WCOLS); | |
440 | } | |
441 | for (from = 0; from <= vcnt; from++) | |
442 | LINE(from) -= cnt; | |
443 | } | |
444 | ||
445 | /* | |
446 | * Discard logical lines due to physical wandering off the screen. | |
447 | */ | |
448 | vscrap() | |
449 | { | |
450 | register int i, j; | |
451 | ||
452 | #ifdef ADEBUG | |
453 | if (trace) | |
454 | tfixnl(), fprintf(trace, "vscrap\n"), tvliny(); | |
455 | #endif | |
456 | if (splitw) | |
457 | return; | |
458 | if (vcnt && WBOT != WECHO && LINE(0) < WTOP && LINE(0) >= ZERO) { | |
459 | WTOP = LINE(0); | |
460 | WLINES = WBOT - WTOP + 1; | |
461 | } | |
462 | for (j = 0; j < vcnt; j++) | |
463 | if (LINE(j) >= WTOP) { | |
464 | if (j == 0) | |
465 | break; | |
466 | /* | |
467 | * Discard the first j physical lines off the top. | |
468 | */ | |
469 | vcnt -= j, vcline -= j; | |
470 | for (i = 0; i <= vcnt; i++) | |
471 | vlcopy(vlinfo[i], vlinfo[i + j]); | |
472 | break; | |
473 | } | |
474 | /* | |
475 | * Discard lines off the bottom. | |
476 | */ | |
477 | if (vcnt) { | |
478 | for (j = 0; j <= vcnt; j++) | |
479 | if (LINE(j) > WBOT || LINE(j) + DEPTH(j) - 1 > WBOT) { | |
480 | vcnt = j; | |
481 | break; | |
482 | } | |
483 | LASTLINE = LINE(vcnt-1) + DEPTH(vcnt-1); | |
484 | } | |
485 | #ifdef ADEBUG | |
486 | if (trace) | |
487 | tvliny(); | |
488 | #endif | |
489 | /* | |
490 | * May have no lines! | |
491 | */ | |
492 | } | |
493 | ||
494 | /* | |
495 | * Repaint the screen, with cursor at curs, aftern an arbitrary change. | |
496 | * Handle notification on large changes. | |
497 | */ | |
498 | vrepaint(curs) | |
499 | char *curs; | |
500 | { | |
501 | ||
502 | wdot = NOLINE; | |
503 | /* | |
504 | * In open want to notify first. | |
505 | */ | |
506 | noteit(0); | |
507 | vscrap(); | |
508 | ||
509 | /* | |
510 | * Deal with a totally useless display. | |
511 | */ | |
512 | if (vcnt == 0 || vcline < 0 || vcline > vcnt || holdupd && state != VISUAL) { | |
513 | register line *odol = dol; | |
514 | ||
515 | vcnt = 0; | |
516 | if (holdupd) | |
517 | if (state == VISUAL) | |
518 | ignore(peekkey()); | |
519 | else | |
520 | vup1(); | |
521 | holdupd = 0; | |
522 | if (odol == zero) | |
523 | fixzero(); | |
524 | vcontext(dot, '.'); | |
525 | noteit(1); | |
526 | if (noteit(1) == 0 && odol == zero) { | |
527 | CATCH | |
528 | error("No lines in buffer"); | |
529 | ENDCATCH | |
530 | linebuf[0] = 0; | |
531 | splitw = 0; | |
532 | } | |
533 | vnline(curs); | |
534 | return; | |
535 | } | |
536 | ||
537 | /* | |
538 | * Have some useful displayed text; refresh it. | |
539 | */ | |
540 | getDOT(); | |
541 | ||
542 | /* | |
543 | * This is for boundary conditions in open mode. | |
544 | */ | |
545 | if (FLAGS(0) & VDIRT) | |
546 | vsync(WTOP); | |
547 | ||
548 | /* | |
549 | * If the current line is after the last displayed line | |
550 | * or the bottom of the screen, then special effort is needed | |
551 | * to get it on the screen. We first try a redraw at the | |
552 | * last line on the screen, hoping it will fill in where @ | |
553 | * lines are now. If this doesn't work, then roll it onto | |
554 | * the screen. | |
555 | */ | |
556 | if (vcline >= vcnt || LINE(vcline) > WBOT) { | |
557 | short oldhold = hold; | |
558 | hold |= HOLDAT, vredraw(LASTLINE), hold = oldhold; | |
559 | if (vcline >= vcnt) { | |
560 | register int i = vcline - vcnt + 1; | |
561 | ||
562 | dot -= i; | |
563 | vcline -= i; | |
564 | vroll(i); | |
565 | } else | |
566 | vsyncCL(); | |
567 | } else | |
568 | vsync(vcline > 0 ? LINE(vcline - 1) : WTOP); | |
569 | ||
570 | /* | |
571 | * Notification on large change for visual | |
572 | * has to be done last or we may lose | |
573 | * the echo area with redisplay. | |
574 | */ | |
575 | noteit(1); | |
576 | ||
577 | /* | |
578 | * Finally. Move the cursor onto the current line. | |
579 | */ | |
580 | vnline(curs); | |
581 | } | |
582 | ||
583 | /* | |
584 | * Fully cleanup the screen, leaving no @ lines except at end when | |
585 | * line after last won't completely fit. The routine vsync is | |
586 | * more conservative and much less work on dumb terminals. | |
587 | */ | |
588 | vredraw(p) | |
589 | register int p; | |
590 | { | |
591 | register int l; | |
592 | register line *tp; | |
593 | char temp[LBSIZE]; | |
594 | bool anydl = 0; | |
595 | short oldhold = hold; | |
596 | ||
597 | #ifdef ADEBUG | |
598 | if (trace) | |
599 | tfixnl(), fprintf(trace, "vredraw(%d)\n", p), tvliny(); | |
600 | #endif | |
601 | if (holdupd) { | |
602 | holdupd = 3; | |
603 | return; | |
604 | } | |
605 | if (state == HARDOPEN || splitw) | |
606 | return; | |
607 | if (p < 0 /* || p > WECHO */) | |
608 | error("Internal error: vredraw"); | |
609 | ||
610 | /* | |
611 | * Trim the ragged edges (lines which are off the screen but | |
612 | * not yet logically discarded), save the current line, and | |
613 | * search for first logical line affected by the redraw. | |
614 | */ | |
615 | vscrap(); | |
616 | CP(temp, linebuf); | |
617 | l = 0; | |
618 | tp = dot - vcline; | |
619 | if (vcnt == 0) | |
620 | LINE(0) = WTOP; | |
621 | while (l < vcnt && LINE(l) < p) | |
622 | l++, tp++; | |
623 | ||
624 | /* | |
625 | * We hold off echo area clearing during the redraw in deference | |
626 | * to a final clear of the echo area at the end if appropriate. | |
627 | */ | |
628 | heldech = 0; | |
629 | hold |= HOLDECH; | |
630 | for (; l < vcnt && Peekkey != ATTN; l++) { | |
631 | if (l == vcline) | |
632 | strcLIN(temp); | |
633 | else | |
634 | getline(*tp); | |
635 | ||
636 | /* | |
637 | * Delete junk between displayed lines. | |
638 | */ | |
639 | if (LINE(l) != LINE(l + 1) && LINE(l) != p) { | |
640 | if (anydl == 0 && DB && CD) { | |
641 | hold = oldhold; | |
642 | vclrech(0); | |
643 | anydl = 1; | |
644 | hold |= HOLDECH; | |
645 | heldech = 0; | |
646 | } | |
647 | vdellin(p, LINE(l) - p, l); | |
648 | } | |
649 | ||
650 | /* | |
651 | * If line image is not know to be up to date, then | |
652 | * redisplay it; else just skip onward. | |
653 | */ | |
654 | LINE(l) = p; | |
655 | if (FLAGS(l) & VDIRT) { | |
656 | DEPTH(l) = vdepth(); | |
657 | if (l != vcline && p + DEPTH(l) - 1 > WBOT) { | |
658 | vscrap(); | |
659 | break; | |
660 | } | |
661 | FLAGS(l) &= ~VDIRT; | |
662 | vreopen(p, lineno(tp), l); | |
663 | p = LINE(l) + DEPTH(l); | |
664 | } else | |
665 | p += DEPTH(l); | |
666 | tp++; | |
667 | } | |
668 | ||
669 | /* | |
670 | * That takes care of lines which were already partially displayed. | |
671 | * Now try to fill the rest of the screen with text. | |
672 | */ | |
673 | if (state == VISUAL && p <= WBOT) { | |
674 | int ovcline = vcline; | |
675 | ||
676 | vcline = l; | |
677 | for (; tp <= dol && Peekkey != ATTN; tp++) { | |
678 | getline(*tp); | |
679 | if (p + vdepth() - 1 > WBOT) | |
680 | break; | |
681 | vopen(tp, p); | |
682 | p += DEPTH(vcline); | |
683 | vcline++; | |
684 | } | |
685 | vcline = ovcline; | |
686 | } | |
687 | ||
688 | /* | |
689 | * Thats all the text we can get on. | |
690 | * Now rest of lines (if any) get either a ~ if they | |
691 | * are past end of file, or an @ if the next line won't fit. | |
692 | */ | |
693 | for (; p <= WBOT && Peekkey != ATTN; p++) | |
694 | vclrlin(p, tp); | |
695 | strcLIN(temp); | |
696 | hold = oldhold; | |
697 | if (heldech) | |
698 | vclrech(0); | |
699 | #ifdef ADEBUG | |
700 | if (trace) | |
701 | tvliny(); | |
702 | #endif | |
703 | } | |
704 | ||
705 | /* | |
706 | * Do the real work in deleting cnt lines starting at line p from | |
707 | * the display. First affected line is line l. | |
708 | */ | |
709 | vdellin(p, cnt, l) | |
710 | int p, cnt, l; | |
711 | { | |
712 | register int i; | |
713 | ||
714 | if (cnt == 0) | |
715 | return; | |
716 | if (DL == NOSTR || cnt < 0) { | |
717 | /* | |
718 | * Can't do it; just remember that line l is munged. | |
719 | */ | |
720 | FLAGS(l) |= VDIRT; | |
721 | return; | |
722 | } | |
723 | #ifdef ADEBUG | |
724 | if (trace) | |
725 | tfixnl(), fprintf(trace, "vdellin(%d, %d, %d)\n", p, cnt, l); | |
726 | #endif | |
727 | /* | |
728 | * Send the deletes to the screen and then adjust logical | |
729 | * and physical internal data structures. | |
730 | */ | |
731 | vgoto(p, 0); | |
732 | for (i = 0; i < cnt; i++) | |
733 | vputp(DL, WECHO - p); | |
734 | vadjDL(p, cnt); | |
735 | vcloseup(l, cnt); | |
736 | } | |
737 | /* | |
738 | * Adjust internal physical screen image to account for deleted lines. | |
739 | */ | |
740 | vadjDL(p, cnt) | |
741 | int p, cnt; | |
742 | { | |
743 | char *tlines[TUBELINES]; | |
744 | register int from, to; | |
745 | ||
746 | #ifdef ADEBUG | |
747 | if (trace) | |
748 | tfixnl(), fprintf(trace, "vadjDL(%d, %d)\n", p, cnt); | |
749 | #endif | |
750 | /* | |
751 | * Would like to use structured assignment but early | |
752 | * v7 compiler (released with phototypesetter for v6) | |
753 | * can't hack it. | |
754 | */ | |
755 | copy(tlines, vtube, sizeof vtube); /*SASSIGN*/ | |
756 | for (from = p + cnt, to = p; from <= WECHO; from++, to++) | |
757 | vtube[to] = tlines[from]; | |
758 | for (from = p; to <= WECHO; from++, to++) { | |
759 | vtube[to] = tlines[from]; | |
760 | vclrbyte(vtube[to], WCOLS); | |
761 | } | |
762 | } | |
763 | /* | |
764 | * Sync the screen, like redraw but more lazy and willing to leave | |
765 | * @ lines on the screen. VsyncCL syncs starting at the current line. | |
766 | * In any case, if the redraw option is set then all syncs map to redraws | |
767 | * as if vsync didn't exist. | |
768 | */ | |
769 | vsyncCL() | |
770 | { | |
771 | ||
772 | vsync(LINE(vcline)); | |
773 | } | |
774 | ||
775 | vsync(p) | |
776 | register int p; | |
777 | { | |
778 | ||
779 | if (value(REDRAW)) | |
780 | vredraw(p); | |
781 | else | |
782 | vsync1(p); | |
783 | } | |
784 | ||
785 | /* | |
786 | * The guts of a sync. Similar to redraw but | |
787 | * just less ambitous. | |
788 | */ | |
789 | vsync1(p) | |
790 | register int p; | |
791 | { | |
792 | register int l; | |
793 | char temp[LBSIZE]; | |
794 | register struct vlinfo *vp = &vlinfo[0]; | |
795 | short oldhold = hold; | |
796 | ||
797 | #ifdef ADEBUG | |
798 | if (trace) | |
799 | tfixnl(), fprintf(trace, "vsync1(%d)\n", p), tvliny(); | |
800 | #endif | |
801 | if (holdupd) { | |
802 | if (holdupd < 3) | |
803 | holdupd = 2; | |
804 | return; | |
805 | } | |
806 | if (state == HARDOPEN || splitw) | |
807 | return; | |
808 | vscrap(); | |
809 | CP(temp, linebuf); | |
810 | if (vcnt == 0) | |
811 | LINE(0) = WTOP; | |
812 | l = 0; | |
813 | while (l < vcnt && vp->vliny < p) | |
814 | l++, vp++; | |
815 | heldech = 0; | |
816 | hold |= HOLDECH; | |
817 | while (p <= WBOT && Peekkey != ATTN) { | |
818 | /* | |
819 | * Want to put a line here if not in visual and first line | |
820 | * or if there are lies left and this line starts before | |
821 | * the current line, or if this line is piled under the | |
822 | * next line (vreplace does this and we undo it). | |
823 | */ | |
824 | if (l == 0 && state != VISUAL || | |
825 | (l < vcnt && (vp->vliny <= p || vp[0].vliny == vp[1].vliny))) { | |
826 | if (l == 0 || vp->vliny < p || (vp->vflags & VDIRT)) { | |
827 | if (l == vcline) | |
828 | strcLIN(temp); | |
829 | else | |
830 | getline(dot[l - vcline]); | |
831 | /* | |
832 | * Be careful that a long line doesn't cause the | |
833 | * screen to shoot up. | |
834 | */ | |
835 | if (l != vcline && (vp->vflags & VDIRT)) { | |
836 | vp->vdepth = vdepth(); | |
837 | vp->vflags &= ~VDIRT; | |
838 | if (p + vp->vdepth - 1 > WBOT) | |
839 | break; | |
840 | } | |
841 | vreopen(p, lineDOT() + (l - vcline), l); | |
842 | } | |
843 | p = vp->vliny + vp->vdepth; | |
844 | vp++; | |
845 | l++; | |
846 | } else | |
847 | /* | |
848 | * A physical line between logical lines, | |
849 | * so we settle for an @ at the beginning. | |
850 | */ | |
851 | vclrlin(p, dot + (l - vcline)), p++; | |
852 | } | |
853 | strcLIN(temp); | |
854 | hold = oldhold; | |
855 | if (heldech) | |
856 | vclrech(0); | |
857 | } | |
858 | ||
859 | /* | |
860 | * Subtract (logically) cnt physical lines from the | |
861 | * displayed position of lines starting with line l. | |
862 | */ | |
863 | vcloseup(l, cnt) | |
864 | int l; | |
865 | register int cnt; | |
866 | { | |
867 | register int i; | |
868 | ||
869 | #ifdef ADEBUG | |
870 | if (trace) | |
871 | tfixnl(), fprintf(trace, "vcloseup(%d, %d)\n", l, cnt); | |
872 | #endif | |
873 | for (i = l + 1; i <= vcnt; i++) | |
874 | LINE(i) -= cnt; | |
875 | } | |
876 | ||
877 | /* | |
878 | * Workhorse for rearranging line descriptors on changes. | |
879 | * The idea here is that, starting with line l, cnt lines | |
880 | * have been replaced with newcnt lines. All of these may | |
881 | * be ridiculous, i.e. l may be -1000, cnt 50 and newcnt 0, | |
882 | * since we may be called from an undo after the screen has | |
883 | * moved a lot. Thus we have to be careful. | |
884 | * | |
885 | * Many boundary conditions here. | |
886 | */ | |
887 | vreplace(l, cnt, newcnt) | |
888 | int l, cnt, newcnt; | |
889 | { | |
890 | register int from, to, i; | |
891 | bool savenote = 0; | |
892 | ||
893 | #ifdef ADEBUG | |
894 | if (trace) { | |
895 | tfixnl(), fprintf(trace, "vreplace(%d, %d, %d)\n", l, cnt, newcnt); | |
896 | tvliny(); | |
897 | } | |
898 | #endif | |
899 | if (l >= vcnt) | |
900 | return; | |
901 | if (l < 0) { | |
902 | if (l + cnt < 0) { | |
903 | /* | |
904 | * Nothing on the screen is relevant. | |
905 | * Settle for redrawing from scratch (later). | |
906 | */ | |
907 | vcnt = 0; | |
908 | return; | |
909 | } | |
910 | /* | |
911 | * Normalize l to top of screen; the add is | |
912 | * really a subtract from cnt since l is negative. | |
913 | */ | |
914 | cnt += l; | |
915 | l = 0; | |
916 | ||
917 | /* | |
918 | * Unseen lines were affect so notify (later). | |
919 | */ | |
920 | savenote++; | |
921 | } | |
922 | ||
923 | /* | |
924 | * These shouldn't happen | |
925 | * but would cause great havoc. | |
926 | */ | |
927 | if (cnt < 0) | |
928 | cnt = 0; | |
929 | if (newcnt < 0) | |
930 | newcnt = 0; | |
931 | ||
932 | /* | |
933 | * Surely worthy of note if more than report | |
934 | * lines were changed. | |
935 | */ | |
936 | if (cnt > value(REPORT) || newcnt > value(REPORT)) | |
937 | savenote++; | |
938 | ||
939 | /* | |
940 | * Same number of lines affeted as on screen, and we | |
941 | * can insert and delete lines. Thus we just type | |
942 | * over them, since otherwise we will push them | |
943 | * slowly off the screen, a clear lose. | |
944 | */ | |
945 | if (cnt == newcnt || vcnt - l == newcnt && AL && DL) { | |
946 | if (cnt > 1 && l + cnt > vcnt) | |
947 | savenote++; | |
948 | vdirty(l, newcnt); | |
949 | } else { | |
950 | /* | |
951 | * Lines are going away, squish them out. | |
952 | */ | |
953 | if (cnt > 0) { | |
954 | /* | |
955 | * If non-displayed lines went away, | |
956 | * always notify. | |
957 | */ | |
958 | if (cnt > 1 && l + cnt > vcnt) | |
959 | savenote++; | |
960 | if (l + cnt >= vcnt) | |
961 | cnt = vcnt - l; | |
962 | else | |
963 | for (from = l + cnt, to = l; from <= vcnt; to++, from++) | |
964 | vlcopy(vlinfo[to], vlinfo[from]); | |
965 | vcnt -= cnt; | |
966 | } | |
967 | /* | |
968 | * Open up space for new lines appearing. | |
969 | * All new lines are piled in the same place, | |
970 | * and will be unpiled by vredraw/vsync, which | |
971 | * inserts lines in front as it unpiles. | |
972 | */ | |
973 | if (newcnt > 0) { | |
974 | /* | |
975 | * Newlines are appearing which may not show, | |
976 | * so notify (this is only approximately correct | |
977 | * when long lines are present). | |
978 | */ | |
979 | if (newcnt > 1 && l + newcnt > vcnt + 1) | |
980 | savenote++; | |
981 | ||
982 | /* | |
983 | * If there will be more lines than fit, then | |
984 | * just throw way the rest of the stuff on the screen. | |
985 | */ | |
986 | if (l + newcnt > WBOT && AL && DL) { | |
987 | vcnt = l; | |
988 | goto skip; | |
989 | } | |
990 | from = vcnt, to = vcnt + newcnt; | |
991 | i = TUBELINES - to; | |
992 | if (i < 0) | |
993 | from += i, to += i; | |
994 | vcnt = to; | |
995 | for (; from >= l; from--, to--) | |
996 | vlcopy(vlinfo[to], vlinfo[from]); | |
997 | for (from = to + 1, to = l; to < l + newcnt && to <= WBOT + 1; to++) { | |
998 | LINE(to) = LINE(from); | |
999 | DEPTH(to) = 0; | |
1000 | FLAGS(to) = VDIRT; | |
1001 | } | |
1002 | } | |
1003 | } | |
1004 | skip: | |
1005 | if (Pline == numbline && cnt != newcnt) | |
1006 | /* | |
1007 | * When lines positions are shifted, the numbers | |
1008 | * will be wrong. | |
1009 | */ | |
1010 | vdirty(l, WECHO); | |
1011 | if (!savenote) | |
1012 | notecnt = 0; | |
1013 | #ifdef ADEBUG | |
1014 | if (trace) | |
1015 | tvliny(); | |
1016 | #endif | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | * Start harcopy open. | |
1021 | * Print an image of the line to the left of the cursor | |
1022 | * under the full print of the line and position the cursor. | |
1023 | * If we are in a scroll ^D within hardcopy open then all this | |
1024 | * is suppressed. | |
1025 | */ | |
1026 | sethard() | |
1027 | { | |
1028 | ||
1029 | if (state == VISUAL) | |
1030 | return; | |
1031 | rubble = 0; | |
1032 | state = HARDOPEN; | |
1033 | if (hold & HOLDROL) | |
1034 | return; | |
1035 | vup1(); | |
1036 | LINE(0) = WBOT; | |
1037 | if (Pline == numbline) | |
1038 | vgoto(WBOT, 0), printf("%6d ", lineDOT()); | |
1039 | } | |
1040 | ||
1041 | /* | |
1042 | * Mark the lines starting at base for i lines | |
1043 | * as dirty so that they will be checked for correct | |
1044 | * display at next sync/redraw. | |
1045 | */ | |
1046 | vdirty(base, i) | |
1047 | register int base, i; | |
1048 | { | |
1049 | register int l; | |
1050 | ||
1051 | for (l = base; l < vcnt; l++) { | |
1052 | if (--i < 0) | |
1053 | return; | |
1054 | FLAGS(l) |= VDIRT; | |
1055 | } | |
1056 | } |