Commit | Line | Data |
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4bfebc61 MH |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
2 | #include "ex.h" | |
3 | #include "ex_tty.h" | |
4 | #include "ex_vis.h" | |
5 | ||
6 | /* | |
7 | * Routines to deal with management of logical versus physical | |
8 | * display, opening and redisplaying lines on the screen, and | |
9 | * use of intelligent terminal operations. Routines to deal with | |
10 | * screen cleanup after a change. | |
11 | */ | |
12 | ||
13 | /* | |
14 | * Display a new line at physical line p, returning | |
15 | * the depth of the newly displayed line. We may decide | |
16 | * to expand the window on an intelligent terminal if it is | |
17 | * less than a full screen by deleting a line above the top of the | |
18 | * window before doing an insert line to keep all the good text | |
19 | * on the screen in which case the line may actually end up | |
20 | * somewhere other than line p. | |
21 | */ | |
22 | vopen(tp, p) | |
23 | line *tp; | |
24 | int p; | |
25 | { | |
26 | register int cnt; | |
27 | register struct vlinfo *vp, *vpc; | |
28 | ||
29 | #ifdef ADEBUG | |
30 | if (trace != NULL) | |
31 | tfixnl(), fprintf(trace, "vopen(%d, %d)\n", lineno(tp), p); | |
32 | #endif | |
33 | if (state != VISUAL) { | |
34 | if (vcnt) | |
35 | if (hold & HOLDROL) | |
36 | vup1(); | |
37 | else | |
38 | vclean(); | |
39 | ||
40 | /* | |
41 | * Forget all that we once knew. | |
42 | */ | |
43 | vcnt = vcline = 0; | |
44 | p = WBOT; LASTLINE = WBOT + 1; | |
45 | state = bastate; | |
46 | WTOP = basWTOP; | |
47 | WLINES = basWLINES; | |
48 | } | |
49 | vpc = &vlinfo[vcline]; | |
50 | for (vp = &vlinfo[vcnt]; vp >= vpc; vp--) | |
51 | vlcopy(vp[1], vp[0]); | |
52 | vcnt++; | |
53 | if (Pline == numbline) | |
54 | /* | |
55 | * Dirtying all the lines is rather inefficient | |
56 | * internally, but number mode is used rarely | |
57 | * and so its not worth optimizing. | |
58 | */ | |
59 | vdirty(vcline+1, WECHO); | |
60 | getline(*tp); | |
61 | ||
62 | /* | |
63 | * If we are opening at the top of the window, can try a window | |
64 | * expansion at the top. | |
65 | */ | |
66 | if (state == VISUAL && vcline == 0 && vcnt > 1 && p > ZERO) { | |
67 | cnt = p + vdepth() - LINE(1); | |
68 | if (cnt > 0) { | |
69 | p -= cnt; | |
70 | if (p < ZERO) | |
71 | p = ZERO; | |
72 | WTOP = p; | |
73 | WLINES = WBOT - WTOP + 1; | |
74 | } | |
75 | } | |
76 | vpc->vliny = p, vpc->vdepth = 0, vpc->vflags = 0; | |
77 | cnt = vreopen(p, lineno(tp), vcline); | |
78 | if (vcline + 1 == vcnt) | |
79 | LINE(vcnt) = LINE(vcline) + cnt; | |
80 | } | |
81 | ||
82 | /* | |
83 | * Redisplay logical line l at physical line p with line number lineno. | |
84 | */ | |
85 | vreopen(p, lineno, l) | |
86 | int p, lineno, l; | |
87 | { | |
88 | register int d; | |
89 | register struct vlinfo *vp = &vlinfo[l]; | |
90 | ||
91 | #ifdef ADEBUG | |
92 | if (trace) | |
93 | tfixnl(), fprintf(trace, "vreopen(%d, %d, %d)\n", p, lineno, l); | |
94 | #endif | |
95 | d = vp->vdepth; | |
96 | if (d == 0 || (vp->vflags & VDIRT)) | |
97 | vp->vdepth = d = vdepth(); | |
98 | vp->vliny = p, vp->vflags &= ~VDIRT; | |
99 | ||
100 | /* | |
101 | * Try to win by making the screen larger rather than inserting | |
102 | * a line and driving text off the bottom. | |
103 | */ | |
104 | p = vglitchup(l, 0); | |
105 | ||
106 | /* | |
107 | * BUG: Should consider using CE here to clear to end of line. | |
108 | * As it stands we always strike over the current text. | |
109 | * Since often the current text is the same as what | |
110 | * we are overstriking with, it tends not to show. | |
111 | * On the other hand if it is different and we end up | |
112 | * spacing out a lot of text, we could have won with | |
113 | * a CE. This is probably worthwhile at low speed | |
114 | * only however, since clearly computation will be | |
115 | * necessary to determine which way to go. | |
116 | */ | |
117 | vigoto(p, 0); | |
118 | pline(lineno); | |
119 | ||
120 | /* | |
121 | * When we are typing part of a line for hardcopy open, don't | |
122 | * want to type the '$' marking an end of line if in list mode. | |
123 | */ | |
124 | if (hold & HOLDDOL) | |
125 | return (d); | |
126 | if (Putchar == listchar) | |
127 | putchar('$'); | |
128 | ||
129 | /* | |
130 | * Optimization of cursor motion may prevent screen rollup if the | |
131 | * line has blanks/tabs at the end unless we force the cursor to appear | |
132 | * on the last line segment. | |
133 | */ | |
134 | if (vp->vliny + d - 1 > WBOT) | |
135 | vcsync(); | |
136 | ||
137 | /* | |
138 | * Switch into hardcopy open mode if we are in one line (adm3) | |
139 | * open mode and this line is now too long. If in hardcopy | |
140 | * open mode, then call sethard to move onto the next line | |
141 | * with appropriate positioning. | |
142 | */ | |
143 | if (state == ONEOPEN) { | |
144 | WCOLS = OCOLUMNS; | |
145 | if (vdepth() > 1) { | |
146 | WCOLS = TUBECOLS; | |
147 | sethard(); | |
148 | } else | |
149 | WCOLS = TUBECOLS; | |
150 | } else if (state == HARDOPEN) | |
151 | sethard(); | |
152 | ||
153 | /* | |
154 | * Unless we filled (completely) the last line we typed on, | |
155 | * we have to clear to the end of the line | |
156 | * in case stuff is left from before. | |
157 | */ | |
158 | if (vp->vliny + d > destline) { | |
159 | if (IN && destcol == WCOLS) | |
160 | vigoto(vp->vliny + d - 1, 0); | |
161 | vclreol(); | |
162 | } | |
163 | return (d); | |
164 | } | |
165 | ||
166 | /* | |
167 | * Real work for winning growing of window at top | |
168 | * when inserting in the middle of a partially full | |
169 | * screen on an intelligent terminal. We have as argument | |
170 | * the logical line number to be inserted after, and the offset | |
171 | * from that line where the insert will go. | |
172 | * We look at the picture of depths and positions, and if we can | |
173 | * delete some (blank) lines from the top of the screen so that | |
174 | * later inserts will not push stuff off the bottom. | |
175 | */ | |
176 | vglitchup(l, o) | |
177 | int l, o; | |
178 | { | |
179 | register struct vlinfo *vp = &vlinfo[l]; | |
180 | register int need; | |
181 | register int p = vp->vliny; | |
182 | short oldhold, oldheldech; | |
183 | bool glitched = 0; | |
184 | ||
185 | if (l < vcnt - 1) { | |
186 | need = p + vp->vdepth - (vp+1)->vliny; | |
187 | if (need > 0) { | |
188 | if (state == VISUAL && WTOP - ZERO >= need && AL && DL) { | |
189 | glitched++; | |
190 | WTOP -= need; | |
191 | WLINES = WBOT - WTOP + 1; | |
192 | p -= need; | |
193 | if (p + o == WTOP) { | |
194 | vp->vliny = WTOP; | |
195 | return (WTOP + o); | |
196 | } | |
197 | vdellin(WTOP, need, -1); | |
198 | oldheldech = heldech; | |
199 | oldhold = hold; | |
200 | hold |= HOLDECH; | |
201 | } | |
202 | vinslin((vp+1)->vliny, need, l); | |
203 | if (glitched) { | |
204 | hold = oldhold; | |
205 | heldech = oldheldech; | |
206 | } | |
207 | } | |
208 | } else | |
209 | vp[1].vliny = vp[0].vliny + vp->vdepth; | |
210 | return (p + o); | |
211 | } | |
212 | ||
213 | /* | |
214 | * Insert cnt blank lines before line p, | |
215 | * logically and (if supported) physically. | |
216 | */ | |
217 | vinslin(p, cnt, l) | |
218 | register int p, cnt; | |
219 | int l; | |
220 | { | |
221 | register int i; | |
222 | bool could = 1; | |
223 | ||
224 | #ifdef ADEBUG | |
225 | if (trace) | |
226 | tfixnl(), fprintf(trace, "vinslin(%d, %d, %d)\n", p, cnt, l); | |
227 | #endif | |
228 | if (p + cnt > WBOT && CD) { | |
229 | /* | |
230 | * Really quick -- clear to end of screen. | |
231 | */ | |
232 | cnt = WECHO + 1 - p; | |
233 | vgoto(p, 0), vputp(CD, cnt); | |
234 | vclrech(1); | |
235 | vadjAL(p, cnt); | |
236 | } else if (AL) { | |
237 | /* | |
238 | * Use insert line. | |
239 | */ | |
240 | vgoto(p, 0), vputp(AL, WECHO + 1 - p); | |
241 | for (i = cnt - 1; i > 0; i--) { | |
242 | vgoto(outline+1, 0), vputp(AL, WECHO + 1 - outline); | |
243 | if ((hold & HOLDAT) == 0) | |
244 | putchar('@'); | |
245 | } | |
246 | vadjAL(p, cnt); | |
247 | } else if (SR && p == WTOP) { | |
248 | /* | |
249 | * Use reverse scroll mode of the terminal, at | |
250 | * the top of the window. | |
251 | */ | |
252 | for (i = cnt; i > 0; i--) { | |
253 | vgoto(p, 0), vputp(SR, 0); | |
254 | if (i > 1 && (hold & HOLDAT) == 0) | |
255 | putchar('@'); | |
256 | /* | |
257 | * If we are at the top of the screen, and the | |
258 | * terminal retains display above, then we | |
259 | * should try to clear to end of line. | |
260 | * Have to use CE since we don't remember what is | |
261 | * actually on the line. | |
262 | */ | |
263 | if (CE && (DA || p != 0)) | |
264 | vputp(CE, 1); | |
265 | } | |
266 | vadjAL(p, cnt); | |
267 | } else | |
268 | could = 0; | |
269 | vopenup(cnt, could, l); | |
270 | } | |
271 | ||
272 | /* | |
273 | * Logically open up after line l, cnt of them. | |
274 | * We need to know if it was done ``physically'' since in this | |
275 | * case we accept what the hardware gives us. If we have to do | |
276 | * it ourselves (brute force) we will squish out @ lines in the process | |
277 | * if this will save us work. | |
278 | */ | |
279 | vopenup(cnt, could, l) | |
280 | int cnt; | |
281 | bool could; | |
282 | { | |
283 | register struct vlinfo *vc = &vlinfo[l + 1]; | |
284 | register struct vlinfo *ve = &vlinfo[vcnt]; | |
285 | ||
286 | #ifdef ADEBUG | |
287 | if (trace) | |
288 | tfixnl(), fprintf(trace, "vopenup(%d, %d, %d)\n", cnt, could, l); | |
289 | #endif | |
290 | if (could) | |
291 | /* | |
292 | * This will push @ lines down the screen, | |
293 | * just as the hardware did. Since the default | |
294 | * for intelligent terminals is to never have @ | |
295 | * lines on the screen, this should never happen, | |
296 | * and the code makes no special effort to be nice in this | |
297 | * case, e.g. squishing out the @ lines by delete lines | |
298 | * before doing append lines. | |
299 | */ | |
300 | for (; vc <= ve; vc++) | |
301 | vc->vliny += cnt; | |
302 | else { | |
303 | /* | |
304 | * Will have to clean up brute force eventually, | |
305 | * so push the line data around as little as possible. | |
306 | */ | |
307 | vc->vliny += cnt, vc->vflags |= VDIRT; | |
308 | while (vc < ve) { | |
309 | register int i = vc->vliny + vc->vdepth; | |
310 | ||
311 | vc++; | |
312 | if (i <= vc->vliny) | |
313 | break; | |
314 | vc->vliny = i, vc->vflags |= VDIRT; | |
315 | } | |
316 | } | |
317 | vscrap(); | |
318 | } | |
319 | ||
320 | /* | |
321 | * Adjust data structure internally to account for insertion of | |
322 | * blank lines on the screen. | |
323 | */ | |
324 | vadjAL(p, cnt) | |
325 | int p, cnt; | |
326 | { | |
327 | char *tlines[TUBELINES]; | |
328 | register int from, to; | |
329 | ||
330 | #ifdef ADEBUG | |
331 | if (trace) | |
332 | tfixnl(), fprintf(trace, "vadjal(%d, %d)\n", p, cnt); | |
333 | #endif | |
334 | copy(tlines, vtube, sizeof vtube); /*SASSIGN*/ | |
335 | for (from = p, to = p + cnt; to <= WECHO; from++, to++) | |
336 | vtube[to] = tlines[from]; | |
337 | for (to = p; from <= WECHO; from++, to++) { | |
338 | vtube[to] = tlines[from]; | |
339 | vclrbyte(vtube[to], WCOLS); | |
340 | } | |
341 | /* | |
342 | * Have to clear the echo area since its contents aren't | |
343 | * necessarily consistent with the rest of the display. | |
344 | */ | |
345 | vclrech(0); | |
346 | } | |
347 | ||
348 | /* | |
349 | * Roll the screen up logically and physically | |
350 | * so that line dl is the bottom line on the screen. | |
351 | */ | |
352 | vrollup(dl) | |
353 | int dl; | |
354 | { | |
355 | register int cnt; | |
356 | register int dc = destcol; | |
357 | ||
358 | #ifdef ADEBUG | |
359 | if (trace) | |
360 | tfixnl(), fprintf(trace, "vrollup(%d)\n", dl); | |
361 | #endif | |
362 | cnt = dl - (splitw ? WECHO : WBOT); | |
363 | if (splitw && (state == VISUAL || state == CRTOPEN)) | |
364 | holdupd = 1; | |
365 | vscroll(cnt); | |
366 | vmoveitup(cnt, 1); | |
367 | destline = dl - cnt, destcol = dc; | |
368 | } | |
369 | ||
370 | vup1() | |
371 | { | |
372 | ||
373 | vrollup(WBOT + 1); | |
374 | } | |
375 | ||
376 | /* | |
377 | * Scroll the screen up cnt lines physically. | |
378 | * If doclr is true, do a clear eol if the terminal | |
379 | * has standout (to prevent it from scrolling up) | |
380 | */ | |
381 | vmoveitup(cnt, doclr) | |
382 | register int cnt; | |
383 | bool doclr; | |
384 | { | |
385 | ||
386 | if (cnt == 0) | |
387 | return; | |
388 | #ifdef ADEBUG | |
389 | if (trace) | |
390 | tfixnl(), fprintf(trace, "vmoveitup(%d)\n", cnt); | |
391 | #endif | |
392 | if (doclr && (SO || SE)) | |
393 | vclrech(0); | |
394 | if (SF) { | |
395 | while (cnt > 0) | |
396 | vputp(SF, 0), cnt--; | |
397 | return; | |
398 | } | |
399 | destline = WECHO + cnt; | |
400 | destcol = (NONL ? 0 : outcol % WCOLS); | |
401 | fgoto(); | |
402 | if (state == ONEOPEN || state == HARDOPEN) { | |
403 | outline = destline = 0; | |
404 | vclrbyte(vtube[0], WCOLS); | |
405 | } | |
406 | } | |
407 | ||
408 | /* | |
409 | * Scroll the screen up cnt lines logically. | |
410 | */ | |
411 | vscroll(cnt) | |
412 | register int cnt; | |
413 | { | |
414 | register int from, to; | |
415 | char *tlines[TUBELINES]; | |
416 | ||
417 | #ifdef ADEBUG | |
418 | if (trace) | |
419 | fprintf(trace, "vscroll(%d)\n", cnt); | |
420 | #endif | |
421 | if (cnt < 0 || cnt > TUBELINES) | |
422 | error("Internal error: vscroll"); | |
423 | if (cnt == 0) | |
424 | return; | |
425 | copy(tlines, vtube, sizeof vtube); | |
426 | for (to = ZERO, from = ZERO + cnt; to <= WECHO - cnt; to++, from++) | |
427 | vtube[to] = tlines[from]; | |
428 | for (from = ZERO; to <= WECHO; to++, from++) { | |
429 | vtube[to] = tlines[from]; | |
430 | vclrbyte(vtube[to], WCOLS); | |
431 | } | |
432 | for (from = 0; from <= vcnt; from++) | |
433 | LINE(from) -= cnt; | |
434 | } | |
435 | ||
436 | /* | |
437 | * Discard logical lines due to physical wandering off the screen. | |
438 | */ | |
439 | vscrap() | |
440 | { | |
441 | register int i, j; | |
442 | ||
443 | #ifdef ADEBUG | |
444 | if (trace) | |
445 | tfixnl(), fprintf(trace, "vscrap\n"), tvliny(); | |
446 | #endif | |
447 | if (splitw) | |
448 | return; | |
449 | if (vcnt && WBOT != WECHO && LINE(0) < WTOP && LINE(0) >= ZERO) { | |
450 | WTOP = LINE(0); | |
451 | WLINES = WBOT - WTOP + 1; | |
452 | } | |
453 | for (j = 0; j < vcnt; j++) | |
454 | if (LINE(j) >= WTOP) { | |
455 | if (j == 0) | |
456 | break; | |
457 | /* | |
458 | * Discard the first j physical lines off the top. | |
459 | */ | |
460 | vcnt -= j, vcline -= j; | |
461 | for (i = 0; i <= vcnt; i++) | |
462 | vlcopy(vlinfo[i], vlinfo[i + j]); | |
463 | break; | |
464 | } | |
465 | /* | |
466 | * Discard lines off the bottom. | |
467 | */ | |
468 | if (vcnt) { | |
469 | for (j = 0; j <= vcnt; j++) | |
470 | if (LINE(j) > WBOT || LINE(j) + DEPTH(j) - 1 > WBOT) { | |
471 | vcnt = j; | |
472 | break; | |
473 | } | |
474 | LASTLINE = LINE(vcnt-1) + DEPTH(vcnt-1); | |
475 | } | |
476 | #ifdef ADEBUG | |
477 | if (trace) | |
478 | tvliny(); | |
479 | #endif | |
480 | /* | |
481 | * May have no lines! | |
482 | */ | |
483 | } | |
484 | ||
485 | /* | |
486 | * Repaint the screen, with cursor at curs, aftern an arbitrary change. | |
487 | * Handle notification on large changes. | |
488 | */ | |
489 | vrepaint(curs) | |
490 | char *curs; | |
491 | { | |
492 | ||
493 | wdot = NOLINE; | |
494 | /* | |
495 | * In open want to notify first. | |
496 | */ | |
497 | noteit(0); | |
498 | vscrap(); | |
499 | ||
500 | /* | |
501 | * Deal with a totally useless display. | |
502 | */ | |
503 | if (vcnt == 0 || vcline < 0 || vcline > vcnt || holdupd && state != VISUAL) { | |
504 | register line *odol = dol; | |
505 | ||
506 | vcnt = 0; | |
507 | if (holdupd) | |
508 | if (state == VISUAL) | |
509 | ignore(peekkey()); | |
510 | else | |
511 | vup1(); | |
512 | holdupd = 0; | |
513 | if (odol == zero) | |
514 | fixzero(); | |
515 | vcontext(dot, '.'); | |
516 | noteit(1); | |
517 | if (noteit(1) == 0 && odol == zero) { | |
518 | CATCH | |
519 | error("No lines in buffer"); | |
520 | ENDCATCH | |
521 | linebuf[0] = 0; | |
522 | splitw = 0; | |
523 | } | |
524 | vnline(curs); | |
525 | return; | |
526 | } | |
527 | ||
528 | /* | |
529 | * Have some useful displayed text; refresh it. | |
530 | */ | |
531 | getDOT(); | |
532 | ||
533 | /* | |
534 | * This is for boundary conditions in open mode. | |
535 | */ | |
536 | if (FLAGS(0) & VDIRT) | |
537 | vsync(WTOP); | |
538 | ||
539 | /* | |
540 | * If the current line is after the last displayed line | |
541 | * or the bottom of the screen, then special effort is needed | |
542 | * to get it on the screen. We first try a redraw at the | |
543 | * last line on the screen, hoping it will fill in where @ | |
544 | * lines are now. If this doesn't work, then roll it onto | |
545 | * the screen. | |
546 | */ | |
547 | if (vcline >= vcnt || LINE(vcline) > WBOT) { | |
548 | short oldhold = hold; | |
549 | hold |= HOLDAT, vredraw(LASTLINE), hold = oldhold; | |
550 | if (vcline >= vcnt) { | |
551 | register int i = vcline - vcnt + 1; | |
552 | ||
553 | dot -= i; | |
554 | vcline -= i; | |
555 | vroll(i); | |
556 | } else | |
557 | vsyncCL(); | |
558 | } else | |
559 | vsync(vcline > 0 ? LINE(vcline - 1) : WTOP); | |
560 | ||
561 | /* | |
562 | * Notification on large change for visual | |
563 | * has to be done last or we may lose | |
564 | * the echo area with redisplay. | |
565 | */ | |
566 | noteit(1); | |
567 | ||
568 | /* | |
569 | * Finally. Move the cursor onto the current line. | |
570 | */ | |
571 | vnline(curs); | |
572 | } | |
573 | ||
574 | /* | |
575 | * Fully cleanup the screen, leaving no @ lines except at end when | |
576 | * line after last won't completely fit. The routine vsync is | |
577 | * more conservative and much less work on dumb terminals. | |
578 | */ | |
579 | vredraw(p) | |
580 | register int p; | |
581 | { | |
582 | register int l; | |
583 | register line *tp; | |
584 | char temp[LBSIZE]; | |
585 | bool anydl = 0; | |
586 | short oldhold = hold; | |
587 | ||
588 | #ifdef ADEBUG | |
589 | if (trace) | |
590 | tfixnl(), fprintf(trace, "vredraw(%d)\n", p), tvliny(); | |
591 | #endif | |
592 | if (holdupd) { | |
593 | holdupd = 3; | |
594 | return; | |
595 | } | |
596 | if (state == HARDOPEN || splitw) | |
597 | return; | |
598 | if (p < 0 /* || p > WECHO */) | |
599 | error("Internal error: vredraw"); | |
600 | ||
601 | /* | |
602 | * Trim the ragged edges (lines which are off the screen but | |
603 | * not yet logically discarded), save the current line, and | |
604 | * search for first logical line affected by the redraw. | |
605 | */ | |
606 | vscrap(); | |
607 | CP(temp, linebuf); | |
608 | l = 0; | |
609 | tp = dot - vcline; | |
610 | if (vcnt == 0) | |
611 | LINE(0) = WTOP; | |
612 | while (l < vcnt && LINE(l) < p) | |
613 | l++, tp++; | |
614 | ||
615 | /* | |
616 | * We hold off echo area clearing during the redraw in deference | |
617 | * to a final clear of the echo area at the end if appropriate. | |
618 | */ | |
619 | heldech = 0; | |
620 | hold |= HOLDECH; | |
621 | for (; l < vcnt && Peekkey != ATTN; l++) { | |
622 | if (l == vcline) | |
623 | strcLIN(temp); | |
624 | else | |
625 | getline(*tp); | |
626 | ||
627 | /* | |
628 | * Delete junk between displayed lines. | |
629 | */ | |
630 | if (LINE(l) != LINE(l + 1) && LINE(l) != p) { | |
631 | if (anydl == 0 && DB && CD) { | |
632 | hold = oldhold; | |
633 | vclrech(0); | |
634 | anydl = 1; | |
635 | hold |= HOLDECH; | |
636 | heldech = 0; | |
637 | } | |
638 | vdellin(p, LINE(l) - p, l); | |
639 | } | |
640 | ||
641 | /* | |
642 | * If line image is not know to be up to date, then | |
643 | * redisplay it; else just skip onward. | |
644 | */ | |
645 | LINE(l) = p; | |
646 | if (FLAGS(l) & VDIRT) { | |
647 | DEPTH(l) = vdepth(); | |
648 | if (l != vcline && p + DEPTH(l) - 1 > WBOT) { | |
649 | vscrap(); | |
650 | break; | |
651 | } | |
652 | FLAGS(l) &= ~VDIRT; | |
653 | vreopen(p, lineno(tp), l); | |
654 | p = LINE(l) + DEPTH(l); | |
655 | } else | |
656 | p += DEPTH(l); | |
657 | tp++; | |
658 | } | |
659 | ||
660 | /* | |
661 | * That takes care of lines which were already partially displayed. | |
662 | * Now try to fill the rest of the screen with text. | |
663 | */ | |
664 | if (state == VISUAL && p <= WBOT) { | |
665 | int ovcline = vcline; | |
666 | ||
667 | vcline = l; | |
668 | for (; tp <= dol && Peekkey != ATTN; tp++) { | |
669 | getline(*tp); | |
670 | if (p + vdepth() - 1 > WBOT) | |
671 | break; | |
672 | vopen(tp, p); | |
673 | p += DEPTH(vcline); | |
674 | vcline++; | |
675 | } | |
676 | vcline = ovcline; | |
677 | } | |
678 | ||
679 | /* | |
680 | * Thats all the text we can get on. | |
681 | * Now rest of lines (if any) get either a ~ if they | |
682 | * are past end of file, or an @ if the next line won't fit. | |
683 | */ | |
684 | for (; p <= WBOT && Peekkey != ATTN; p++) | |
685 | vclrlin(p, tp); | |
686 | strcLIN(temp); | |
687 | hold = oldhold; | |
688 | if (heldech) | |
689 | vclrech(0); | |
690 | #ifdef ADEBUG | |
691 | if (trace) | |
692 | tvliny(); | |
693 | #endif | |
694 | } | |
695 | ||
696 | /* | |
697 | * Do the real work in deleting cnt lines starting at line p from | |
698 | * the display. First affected line is line l. | |
699 | */ | |
700 | vdellin(p, cnt, l) | |
701 | int p, cnt, l; | |
702 | { | |
703 | register int i; | |
704 | ||
705 | if (cnt == 0) | |
706 | return; | |
707 | if (DL == NOSTR || cnt < 0) { | |
708 | /* | |
709 | * Can't do it; just remember that line l is munged. | |
710 | */ | |
711 | FLAGS(l) |= VDIRT; | |
712 | return; | |
713 | } | |
714 | #ifdef ADEBUG | |
715 | if (trace) | |
716 | tfixnl(), fprintf(trace, "vdellin(%d, %d, %d)\n", p, cnt, l); | |
717 | #endif | |
718 | /* | |
719 | * Send the deletes to the screen and then adjust logical | |
720 | * and physical internal data structures. | |
721 | */ | |
722 | vgoto(p, 0); | |
723 | for (i = 0; i < cnt; i++) | |
724 | vputp(DL, WECHO - p); | |
725 | vadjDL(p, cnt); | |
726 | vcloseup(l, cnt); | |
727 | } | |
728 | /* | |
729 | * Adjust internal physical screen image to account for deleted lines. | |
730 | */ | |
731 | vadjDL(p, cnt) | |
732 | int p, cnt; | |
733 | { | |
734 | char *tlines[TUBELINES]; | |
735 | register int from, to; | |
736 | ||
737 | #ifdef ADEBUG | |
738 | if (trace) | |
739 | tfixnl(), fprintf(trace, "vadjDL(%d, %d)\n", p, cnt); | |
740 | #endif | |
741 | /* | |
742 | * Would like to use structured assignment but early | |
743 | * v7 compiler (released with phototypesetter for v6) | |
744 | * can't hack it. | |
745 | */ | |
746 | copy(tlines, vtube, sizeof vtube); /*SASSIGN*/ | |
747 | for (from = p + cnt, to = p; from <= WECHO; from++, to++) | |
748 | vtube[to] = tlines[from]; | |
749 | for (from = p; to <= WECHO; from++, to++) { | |
750 | vtube[to] = tlines[from]; | |
751 | vclrbyte(vtube[to], WCOLS); | |
752 | } | |
753 | } | |
754 | /* | |
755 | * Sync the screen, like redraw but more lazy and willing to leave | |
756 | * @ lines on the screen. VsyncCL syncs starting at the current line. | |
757 | * In any case, if the redraw option is set then all syncs map to redraws | |
758 | * as if vsync didn't exist. | |
759 | */ | |
760 | vsyncCL() | |
761 | { | |
762 | ||
763 | vsync(LINE(vcline)); | |
764 | } | |
765 | ||
766 | vsync(p) | |
767 | register int p; | |
768 | { | |
769 | ||
770 | if (value(REDRAW)) | |
771 | vredraw(p); | |
772 | else | |
773 | vsync1(p); | |
774 | } | |
775 | ||
776 | /* | |
777 | * The guts of a sync. Similar to redraw but | |
778 | * just less ambitous. | |
779 | */ | |
780 | vsync1(p) | |
781 | register int p; | |
782 | { | |
783 | register int l; | |
784 | char temp[LBSIZE]; | |
785 | register struct vlinfo *vp = &vlinfo[0]; | |
786 | short oldhold = hold; | |
787 | ||
788 | #ifdef ADEBUG | |
789 | if (trace) | |
790 | tfixnl(), fprintf(trace, "vsync1(%d)\n", p), tvliny(); | |
791 | #endif | |
792 | if (holdupd) { | |
793 | if (holdupd < 3) | |
794 | holdupd = 2; | |
795 | return; | |
796 | } | |
797 | if (state == HARDOPEN || splitw) | |
798 | return; | |
799 | vscrap(); | |
800 | CP(temp, linebuf); | |
801 | if (vcnt == 0) | |
802 | LINE(0) = WTOP; | |
803 | l = 0; | |
804 | while (l < vcnt && vp->vliny < p) | |
805 | l++, vp++; | |
806 | heldech = 0; | |
807 | hold |= HOLDECH; | |
808 | while (p <= WBOT && Peekkey != ATTN) { | |
809 | /* | |
810 | * Want to put a line here if not in visual and first line | |
811 | * or if there are lies left and this line starts before | |
812 | * the current line, or if this line is piled under the | |
813 | * next line (vreplace does this and we undo it). | |
814 | */ | |
815 | if (l == 0 && state != VISUAL || | |
816 | (l < vcnt && (vp->vliny <= p || vp[0].vliny == vp[1].vliny))) { | |
817 | if (l == 0 || vp->vliny < p || (vp->vflags & VDIRT)) { | |
818 | if (l == vcline) | |
819 | strcLIN(temp); | |
820 | else | |
821 | getline(dot[l - vcline]); | |
822 | /* | |
823 | * Be careful that a long line doesn't cause the | |
824 | * screen to shoot up. | |
825 | */ | |
826 | if (l != vcline && (vp->vflags & VDIRT)) { | |
827 | vp->vdepth = vdepth(); | |
828 | vp->vflags &= ~VDIRT; | |
829 | if (p + vp->vdepth - 1 > WBOT) | |
830 | break; | |
831 | } | |
832 | vreopen(p, lineDOT() + (l - vcline), l); | |
833 | } | |
834 | p = vp->vliny + vp->vdepth; | |
835 | vp++; | |
836 | l++; | |
837 | } else | |
838 | /* | |
839 | * A physical line between logical lines, | |
840 | * so we settle for an @ at the beginning. | |
841 | */ | |
842 | vclrlin(p, dot + (l - vcline)), p++; | |
843 | } | |
844 | strcLIN(temp); | |
845 | hold = oldhold; | |
846 | if (heldech) | |
847 | vclrech(0); | |
848 | } | |
849 | ||
850 | /* | |
851 | * Subtract (logically) cnt physical lines from the | |
852 | * displayed position of lines starting with line l. | |
853 | */ | |
854 | vcloseup(l, cnt) | |
855 | int l; | |
856 | register int cnt; | |
857 | { | |
858 | register int i; | |
859 | ||
860 | #ifdef ADEBUG | |
861 | if (trace) | |
862 | tfixnl(), fprintf(trace, "vcloseup(%d, %d)\n", l, cnt); | |
863 | #endif | |
864 | for (i = l + 1; i <= vcnt; i++) | |
865 | LINE(i) -= cnt; | |
866 | } | |
867 | ||
868 | /* | |
869 | * Workhorse for rearranging line descriptors on changes. | |
870 | * The idea here is that, starting with line l, cnt lines | |
871 | * have been replaced with newcnt lines. All of these may | |
872 | * be ridiculous, i.e. l may be -1000, cnt 50 and newcnt 0, | |
873 | * since we may be called from an undo after the screen has | |
874 | * moved a lot. Thus we have to be careful. | |
875 | * | |
876 | * Many boundary conditions here. | |
877 | */ | |
878 | vreplace(l, cnt, newcnt) | |
879 | int l, cnt, newcnt; | |
880 | { | |
881 | register int from, to, i; | |
882 | bool savenote = 0; | |
883 | ||
884 | #ifdef ADEBUG | |
885 | if (trace) { | |
886 | tfixnl(), fprintf(trace, "vreplace(%d, %d, %d)\n", l, cnt, newcnt); | |
887 | tvliny(); | |
888 | } | |
889 | #endif | |
890 | if (l >= vcnt) | |
891 | return; | |
892 | if (l < 0) { | |
893 | if (l + cnt < 0) { | |
894 | /* | |
895 | * Nothing on the screen is relevant. | |
896 | * Settle for redrawing from scratch (later). | |
897 | */ | |
898 | vcnt = 0; | |
899 | return; | |
900 | } | |
901 | /* | |
902 | * Normalize l to top of screen; the add is | |
903 | * really a subtract from cnt since l is negative. | |
904 | */ | |
905 | cnt += l; | |
906 | l = 0; | |
907 | ||
908 | /* | |
909 | * Unseen lines were affect so notify (later). | |
910 | */ | |
911 | savenote++; | |
912 | } | |
913 | ||
914 | /* | |
915 | * These shouldn't happen | |
916 | * but would cause great havoc. | |
917 | */ | |
918 | if (cnt < 0) | |
919 | cnt = 0; | |
920 | if (newcnt < 0) | |
921 | newcnt = 0; | |
922 | ||
923 | /* | |
924 | * Surely worthy of note if more than report | |
925 | * lines were changed. | |
926 | */ | |
927 | if (cnt > value(REPORT) || newcnt > value(REPORT)) | |
928 | savenote++; | |
929 | ||
930 | /* | |
931 | * Same number of lines affeted as on screen, and we | |
932 | * can insert and delete lines. Thus we just type | |
933 | * over them, since otherwise we will push them | |
934 | * slowly off the screen, a clear lose. | |
935 | */ | |
936 | if (cnt == newcnt || vcnt - l == newcnt && AL && DL) { | |
937 | if (cnt > 1 && l + cnt > vcnt) | |
938 | savenote++; | |
939 | vdirty(l, newcnt); | |
940 | } else { | |
941 | /* | |
942 | * Lines are going away, squish them out. | |
943 | */ | |
944 | if (cnt > 0) { | |
945 | /* | |
946 | * If non-displayed lines went away, | |
947 | * always notify. | |
948 | */ | |
949 | if (cnt > 1 && l + cnt > vcnt) | |
950 | savenote++; | |
951 | if (l + cnt >= vcnt) | |
952 | cnt = vcnt - l; | |
953 | else | |
954 | for (from = l + cnt, to = l; from <= vcnt; to++, from++) | |
955 | vlcopy(vlinfo[to], vlinfo[from]); | |
956 | vcnt -= cnt; | |
957 | } | |
958 | /* | |
959 | * Open up space for new lines appearing. | |
960 | * All new lines are piled in the same place, | |
961 | * and will be unpiled by vredraw/vsync, which | |
962 | * inserts lines in front as it unpiles. | |
963 | */ | |
964 | if (newcnt > 0) { | |
965 | /* | |
966 | * Newlines are appearing which may not show, | |
967 | * so notify (this is only approximately correct | |
968 | * when long lines are present). | |
969 | */ | |
970 | if (newcnt > 1 && l + newcnt > vcnt + 1) | |
971 | savenote++; | |
972 | ||
973 | /* | |
974 | * If there will be more lines than fit, then | |
975 | * just throw way the rest of the stuff on the screen. | |
976 | */ | |
977 | if (l + newcnt > WBOT && AL && DL) { | |
978 | vcnt = l; | |
979 | goto skip; | |
980 | } | |
981 | from = vcnt, to = vcnt + newcnt; | |
982 | i = TUBELINES - to; | |
983 | if (i < 0) | |
984 | from += i, to += i; | |
985 | vcnt = to; | |
986 | for (; from >= l; from--, to--) | |
987 | vlcopy(vlinfo[to], vlinfo[from]); | |
988 | for (from = to + 1, to = l; to < l + newcnt && to <= WBOT + 1; to++) { | |
989 | LINE(to) = LINE(from); | |
990 | DEPTH(to) = 0; | |
991 | FLAGS(to) = VDIRT; | |
992 | } | |
993 | } | |
994 | } | |
995 | skip: | |
996 | if (Pline == numbline && cnt != newcnt) | |
997 | /* | |
998 | * When lines positions are shifted, the numbers | |
999 | * will be wrong. | |
1000 | */ | |
1001 | vdirty(l, WECHO); | |
1002 | if (!savenote) | |
1003 | notecnt = 0; | |
1004 | #ifdef ADEBUG | |
1005 | if (trace) | |
1006 | tvliny(); | |
1007 | #endif | |
1008 | } | |
1009 | ||
1010 | /* | |
1011 | * Start harcopy open. | |
1012 | * Print an image of the line to the left of the cursor | |
1013 | * under the full print of the line and position the cursor. | |
1014 | * If we are in a scroll ^D within hardcopy open then all this | |
1015 | * is suppressed. | |
1016 | */ | |
1017 | sethard() | |
1018 | { | |
1019 | ||
1020 | if (state == VISUAL) | |
1021 | return; | |
1022 | rubble = 0; | |
1023 | state = HARDOPEN; | |
1024 | if (hold & HOLDROL) | |
1025 | return; | |
1026 | vup1(); | |
1027 | LINE(0) = WBOT; | |
1028 | if (Pline == numbline) | |
1029 | vgoto(WBOT, 0), printf("%6d ", lineDOT()); | |
1030 | } | |
1031 | ||
1032 | /* | |
1033 | * Mark the lines starting at base for i lines | |
1034 | * as dirty so that they will be checked for correct | |
1035 | * display at next sync/redraw. | |
1036 | */ | |
1037 | vdirty(base, i) | |
1038 | register int base, i; | |
1039 | { | |
1040 | register int l; | |
1041 | ||
1042 | for (l = base; l < vcnt; l++) { | |
1043 | if (--i < 0) | |
1044 | return; | |
1045 | FLAGS(l) |= VDIRT; | |
1046 | } | |
1047 | } |