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 | |
5a6c967e | 8 | static char *sccsid = "@(#)ex_v.c 7.9 (Berkeley) %G%"; |
19d73a0e DF |
9 | #endif not lint |
10 | ||
59ae3464 MH |
11 | #include "ex.h" |
12 | #include "ex_re.h" | |
13 | #include "ex_tty.h" | |
14 | #include "ex_vis.h" | |
15 | ||
16 | /* | |
17 | * Entry points to open and visual from command mode processor. | |
18 | * The open/visual code breaks down roughly as follows: | |
19 | * | |
20 | * ex_v.c entry points, checking of terminal characteristics | |
21 | * | |
22 | * ex_vadj.c logical screen control, use of intelligent operations | |
23 | * insert/delete line and coordination with screen image; | |
24 | * updating of screen after changes. | |
25 | * | |
26 | * ex_vget.c input of single keys and reading of input lines | |
27 | * from the echo area, handling of \ escapes on input for | |
28 | * uppercase only terminals, handling of memory for repeated | |
29 | * commands and small saved texts from inserts and partline | |
30 | * deletes, notification of multi line changes in the echo | |
31 | * area. | |
32 | * | |
33 | * ex_vmain.c main command decoding, some command processing. | |
34 | * | |
35 | * ex_voperate.c decoding of operator/operand sequences and | |
36 | * contextual scans, implementation of word motions. | |
37 | * | |
38 | * ex_vops.c major operator interfaces, undos, motions, deletes, | |
39 | * changes, opening new lines, shifts, replacements and yanks | |
40 | * coordinating logical and physical changes. | |
41 | * | |
42 | * ex_vops2.c subroutines for operator interfaces in ex_vops.c, | |
43 | * insert mode, read input line processing at lowest level. | |
44 | * | |
45 | * ex_vops3.c structured motion definitions of ( ) { } and [ ] operators, | |
46 | * indent for lisp routines, () and {} balancing. | |
47 | * | |
48 | * ex_vput.c output routines, clearing, physical mapping of logical cursor | |
49 | * positioning, cursor motions, handling of insert character | |
50 | * and delete character functions of intelligent and unintelligent | |
51 | * terminals, visual mode tracing routines (for debugging), | |
52 | * control of screen image and its updating. | |
53 | * | |
54 | * ex_vwind.c window level control of display, forward and backward rolls, | |
55 | * absolute motions, contextual displays, line depth determination | |
56 | */ | |
57 | ||
2de97448 JB |
58 | jmp_buf venv; |
59 | int winch(); | |
60 | ||
59ae3464 MH |
61 | /* |
62 | * Enter open mode | |
63 | */ | |
3c7b865a MH |
64 | #ifdef u370 |
65 | char atube[TUBESIZE+LBSIZE]; | |
66 | #endif | |
59ae3464 MH |
67 | oop() |
68 | { | |
69 | register char *ic; | |
3c7b865a | 70 | #ifndef u370 |
59ae3464 | 71 | char atube[TUBESIZE + LBSIZE]; |
3c7b865a | 72 | #endif |
299f2784 | 73 | ttymode f; /* mjm: was register */ |
59ae3464 | 74 | |
5a6c967e | 75 | if (setjmp(venv)) { |
2de97448 JB |
76 | setsize(); |
77 | initev = (char *)0; | |
78 | inopen = 0; | |
79 | addr1 = addr2 = dot; | |
80 | } | |
5a6c967e | 81 | #ifdef SIGWINCH |
2de97448 | 82 | (void)signal(SIGWINCH, winch); |
5a6c967e | 83 | #endif |
59ae3464 MH |
84 | ovbeg(); |
85 | if (peekchar() == '/') { | |
5a6c967e | 86 | ignore(compile(ex_getchar(), 1)); |
59ae3464 MH |
87 | savere(scanre); |
88 | if (execute(0, dot) == 0) | |
89 | error("Fail|Pattern not found on addressed line"); | |
90 | ic = loc1; | |
91 | if (ic > linebuf && *ic == 0) | |
92 | ic--; | |
93 | } else { | |
94 | getDOT(); | |
95 | ic = vskipwh(linebuf); | |
96 | } | |
97 | newline(); | |
98 | ||
99 | /* | |
100 | * If overstrike then have to HARDOPEN | |
101 | * else if can move cursor up off current line can use CRTOPEN (~~vi1) | |
102 | * otherwise (ugh) have to use ONEOPEN (like adm3) | |
103 | */ | |
104 | if (OS && !EO) | |
105 | bastate = HARDOPEN; | |
106 | else if (CA || UP) | |
107 | bastate = CRTOPEN; | |
108 | else | |
109 | bastate = ONEOPEN; | |
110 | setwind(); | |
111 | ||
112 | /* | |
113 | * To avoid bombing on glass-crt's when the line is too long | |
114 | * pretend that such terminals are 160 columns wide. | |
115 | * If a line is too wide for display, we will dynamically | |
116 | * switch to hardcopy open mode. | |
117 | */ | |
118 | if (state != CRTOPEN) | |
119 | WCOLS = TUBECOLS; | |
120 | if (!inglobal) | |
121 | savevis(); | |
122 | vok(atube); | |
123 | if (state != CRTOPEN) | |
124 | COLUMNS = WCOLS; | |
125 | Outchar = vputchar; | |
126 | f = ostart(); | |
127 | if (state == CRTOPEN) { | |
128 | if (outcol == UKCOL) | |
129 | outcol = 0; | |
130 | vmoveitup(1, 1); | |
131 | } else | |
132 | outline = destline = WBOT; | |
133 | vshow(dot, NOLINE); | |
134 | vnline(ic); | |
135 | vmain(); | |
136 | if (state != CRTOPEN) | |
137 | vclean(); | |
138 | Command = "open"; | |
139 | ovend(f); | |
5a6c967e | 140 | #ifdef SIGWINCH |
2de97448 | 141 | (void)signal(SIGWINCH, SIG_DFL); |
5a6c967e | 142 | #endif |
59ae3464 MH |
143 | } |
144 | ||
145 | ovbeg() | |
146 | { | |
147 | ||
148 | if (!value(OPEN)) | |
149 | error("Can't use open/visual unless open option is set"); | |
150 | if (inopen) | |
151 | error("Recursive open/visual not allowed"); | |
152 | Vlines = lineDOL(); | |
153 | fixzero(); | |
154 | setdot(); | |
155 | pastwh(); | |
156 | dot = addr2; | |
157 | } | |
158 | ||
159 | ovend(f) | |
d266c416 | 160 | ttymode f; |
59ae3464 MH |
161 | { |
162 | ||
163 | splitw++; | |
164 | vgoto(WECHO, 0); | |
165 | vclreol(); | |
166 | vgoto(WECHO, 0); | |
167 | holdcm = 0; | |
168 | splitw = 0; | |
169 | ostop(f); | |
170 | setoutt(); | |
171 | undvis(); | |
172 | COLUMNS = OCOLUMNS; | |
173 | inopen = 0; | |
174 | flusho(); | |
175 | netchHAD(Vlines); | |
176 | } | |
177 | ||
178 | /* | |
179 | * Enter visual mode | |
180 | */ | |
181 | vop() | |
182 | { | |
183 | register int c; | |
3c7b865a | 184 | #ifndef u370 |
59ae3464 | 185 | char atube[TUBESIZE + LBSIZE]; |
3c7b865a | 186 | #endif |
299f2784 | 187 | ttymode f; /* mjm: was register */ |
59ae3464 MH |
188 | |
189 | if (!CA && UP == NOSTR) { | |
190 | if (initev) { | |
191 | toopen: | |
192 | merror("[Using open mode]"); | |
193 | putNFL(); | |
194 | oop(); | |
195 | return; | |
196 | } | |
197 | error("Visual needs addressible cursor or upline capability"); | |
198 | } | |
199 | if (OS && !EO) { | |
200 | if (initev) | |
201 | goto toopen; | |
202 | error("Can't use visual on a terminal which overstrikes"); | |
203 | } | |
204 | if (!CL) { | |
205 | if (initev) | |
206 | goto toopen; | |
207 | error("Visual requires clear screen capability"); | |
208 | } | |
d266c416 MH |
209 | if (NS && !SF) { |
210 | if (initev) | |
211 | goto toopen; | |
212 | error("Visual requires scrolling"); | |
213 | } | |
5a6c967e | 214 | if (setjmp(venv)) { |
2de97448 JB |
215 | setsize(); |
216 | initev = (char *)0; | |
217 | inopen = 0; | |
218 | addr1 = addr2 = dot; | |
219 | } | |
5a6c967e | 220 | #ifdef SIGWINCH |
2de97448 | 221 | (void)signal(SIGWINCH, winch); |
5a6c967e | 222 | #endif |
59ae3464 MH |
223 | ovbeg(); |
224 | bastate = VISUAL; | |
225 | c = 0; | |
226 | if (any(peekchar(), "+-^.")) | |
5a6c967e | 227 | c = ex_getchar(); |
59ae3464 MH |
228 | pastwh(); |
229 | vsetsiz(isdigit(peekchar()) ? getnum() : value(WINDOW)); | |
230 | setwind(); | |
231 | newline(); | |
232 | vok(atube); | |
233 | if (!inglobal) | |
234 | savevis(); | |
235 | Outchar = vputchar; | |
236 | vmoving = 0; | |
237 | f = ostart(); | |
238 | if (initev == 0) { | |
239 | vcontext(dot, c); | |
240 | vnline(NOSTR); | |
241 | } | |
242 | vmain(); | |
243 | Command = "visual"; | |
244 | ovend(f); | |
5a6c967e | 245 | #ifdef SIGWINCH |
2de97448 | 246 | (void)signal(SIGWINCH, SIG_DFL); |
5a6c967e | 247 | #endif |
59ae3464 MH |
248 | } |
249 | ||
250 | /* | |
251 | * Hack to allow entry to visual with | |
252 | * empty buffer since routines internally | |
253 | * demand at least one line. | |
254 | */ | |
255 | fixzero() | |
256 | { | |
257 | ||
258 | if (dol == zero) { | |
259 | register bool ochng = chng; | |
260 | ||
261 | vdoappend(""); | |
262 | if (!ochng) | |
5a6c967e | 263 | ex_sync(); |
59ae3464 MH |
264 | addr1 = addr2 = one; |
265 | } else if (addr2 == zero) | |
266 | addr2 = one; | |
267 | } | |
268 | ||
269 | /* | |
270 | * Save lines before visual between unddol and truedol. | |
271 | * Accomplish this by throwing away current [unddol,truedol] | |
272 | * and then saving all the lines in the buffer and moving | |
273 | * unddol back to dol. Don't do this if in a global. | |
274 | * | |
275 | * If you do | |
276 | * g/xxx/vi. | |
277 | * and then do a | |
278 | * :e xxxx | |
279 | * at some point, and then quit from the visual and undo | |
280 | * you get the old file back. Somewhat weird. | |
281 | */ | |
282 | savevis() | |
283 | { | |
284 | ||
285 | if (inglobal) | |
286 | return; | |
287 | truedol = unddol; | |
288 | saveall(); | |
289 | unddol = dol; | |
290 | undkind = UNDNONE; | |
291 | } | |
292 | ||
293 | /* | |
294 | * Restore a sensible state after a visual/open, moving the saved | |
295 | * stuff back to [unddol,dol], and killing the partial line kill indicators. | |
296 | */ | |
297 | undvis() | |
298 | { | |
299 | ||
300 | if (ruptible) | |
301 | signal(SIGINT, onintr); | |
302 | squish(); | |
303 | pkill[0] = pkill[1] = 0; | |
304 | unddol = truedol; | |
305 | unddel = zero; | |
306 | undap1 = one; | |
307 | undap2 = dol + 1; | |
308 | undkind = UNDALL; | |
d266c416 MH |
309 | if (undadot <= zero || undadot > dol) |
310 | undadot = zero+1; | |
59ae3464 MH |
311 | } |
312 | ||
313 | /* | |
314 | * Set the window parameters based on the base state bastate | |
315 | * and the available buffer space. | |
316 | */ | |
317 | setwind() | |
318 | { | |
319 | ||
320 | WCOLS = COLUMNS; | |
321 | switch (bastate) { | |
322 | ||
323 | case ONEOPEN: | |
324 | if (AM) | |
325 | WCOLS--; | |
326 | /* fall into ... */ | |
327 | ||
328 | case HARDOPEN: | |
329 | basWTOP = WTOP = WBOT = WECHO = 0; | |
5a6c967e | 330 | ex_ZERO = 0; |
59ae3464 MH |
331 | holdcm++; |
332 | break; | |
333 | ||
334 | case CRTOPEN: | |
335 | basWTOP = LINES - 2; | |
336 | /* fall into */ | |
337 | ||
338 | case VISUAL: | |
5a6c967e CH |
339 | ex_ZERO = LINES - TUBESIZE / WCOLS; |
340 | if (ex_ZERO < 0) | |
341 | ex_ZERO = 0; | |
342 | if (ex_ZERO > basWTOP) | |
59ae3464 MH |
343 | error("Screen too large for internal buffer"); |
344 | WTOP = basWTOP; WBOT = LINES - 2; WECHO = LINES - 1; | |
345 | break; | |
346 | } | |
347 | state = bastate; | |
348 | basWLINES = WLINES = WBOT - WTOP + 1; | |
349 | } | |
350 | ||
351 | /* | |
352 | * Can we hack an open/visual on this terminal? | |
353 | * If so, then divide the screen buffer up into lines, | |
354 | * and initialize a bunch of state variables before we start. | |
355 | */ | |
356 | vok(atube) | |
357 | register char *atube; | |
358 | { | |
359 | register int i; | |
360 | ||
361 | if (WCOLS == 1000) | |
362 | serror("Don't know enough about your terminal to use %s", Command); | |
363 | if (WCOLS > TUBECOLS) | |
364 | error("Terminal too wide"); | |
5a6c967e | 365 | if (WLINES >= TUBELINES || WCOLS * (WECHO - ex_ZERO + 1) > TUBESIZE) |
59ae3464 MH |
366 | error("Screen too large"); |
367 | ||
368 | vtube0 = atube; | |
5a6c967e CH |
369 | vclrbyte(atube, WCOLS * (WECHO - ex_ZERO + 1)); |
370 | for (i = 0; i < ex_ZERO; i++) | |
887e3e0d | 371 | vtube[i] = (char *) 0; |
59ae3464 MH |
372 | for (; i <= WECHO; i++) |
373 | vtube[i] = atube, atube += WCOLS; | |
374 | for (; i < TUBELINES; i++) | |
887e3e0d | 375 | vtube[i] = (char *) 0; |
59ae3464 MH |
376 | vutmp = atube; |
377 | vundkind = VNONE; | |
378 | vUNDdot = 0; | |
379 | OCOLUMNS = COLUMNS; | |
380 | inopen = 1; | |
381 | #ifdef CBREAK | |
382 | signal(SIGINT, vintr); | |
383 | #endif | |
384 | vmoving = 0; | |
385 | splitw = 0; | |
386 | doomed = 0; | |
387 | holdupd = 0; | |
5a6c967e | 388 | Peek_key = 0; |
59ae3464 | 389 | vcnt = vcline = 0; |
5a6c967e CH |
390 | if (ex_vSCROLL == 0) |
391 | ex_vSCROLL = (value(WINDOW)+1)/2; /* round up so dft=6,11 */ | |
59ae3464 MH |
392 | } |
393 | ||
394 | #ifdef CBREAK | |
395 | vintr() | |
396 | { | |
b3c5103a | 397 | extern jmp_buf readbuf; |
47bdd628 | 398 | extern int doingread; |
59ae3464 MH |
399 | |
400 | signal(SIGINT, vintr); | |
401 | if (vcatch) | |
402 | onintr(); | |
403 | ungetkey(ATTN); | |
404 | draino(); | |
47bdd628 SL |
405 | if (doingread) { |
406 | doingread = 0; | |
407 | longjmp(readbuf, 1); | |
408 | } | |
59ae3464 MH |
409 | } |
410 | #endif | |
411 | ||
412 | /* | |
413 | * Set the size of the screen to size lines, to take effect the | |
414 | * next time the screen is redrawn. | |
415 | */ | |
416 | vsetsiz(size) | |
417 | int size; | |
418 | { | |
419 | register int b; | |
420 | ||
421 | if (bastate != VISUAL) | |
422 | return; | |
423 | b = LINES - 1 - size; | |
424 | if (b >= LINES - 1) | |
425 | b = LINES - 2; | |
426 | if (b < 0) | |
427 | b = 0; | |
428 | basWTOP = b; | |
429 | basWLINES = WBOT - b + 1; | |
430 | } | |
2de97448 | 431 | |
5a6c967e | 432 | #ifdef SIGWINCH |
2de97448 JB |
433 | winch() |
434 | { | |
435 | vsave(); | |
5a6c967e | 436 | ignore(setty(normf)); |
2de97448 JB |
437 | longjmp(venv, 1); |
438 | } | |
5a6c967e | 439 | #endif |