Commit | Line | Data |
---|---|---|
7c4625ef | 1 | /* Copyright (c) 1980 Regents of the University of California */ |
31cef89c | 2 | static char *sccsid = "@(#)ex_v.c 6.1 10/18/80"; |
59ae3464 MH |
3 | #include "ex.h" |
4 | #include "ex_re.h" | |
5 | #include "ex_tty.h" | |
6 | #include "ex_vis.h" | |
7 | ||
8 | /* | |
9 | * Entry points to open and visual from command mode processor. | |
10 | * The open/visual code breaks down roughly as follows: | |
11 | * | |
12 | * ex_v.c entry points, checking of terminal characteristics | |
13 | * | |
14 | * ex_vadj.c logical screen control, use of intelligent operations | |
15 | * insert/delete line and coordination with screen image; | |
16 | * updating of screen after changes. | |
17 | * | |
18 | * ex_vget.c input of single keys and reading of input lines | |
19 | * from the echo area, handling of \ escapes on input for | |
20 | * uppercase only terminals, handling of memory for repeated | |
21 | * commands and small saved texts from inserts and partline | |
22 | * deletes, notification of multi line changes in the echo | |
23 | * area. | |
24 | * | |
25 | * ex_vmain.c main command decoding, some command processing. | |
26 | * | |
27 | * ex_voperate.c decoding of operator/operand sequences and | |
28 | * contextual scans, implementation of word motions. | |
29 | * | |
30 | * ex_vops.c major operator interfaces, undos, motions, deletes, | |
31 | * changes, opening new lines, shifts, replacements and yanks | |
32 | * coordinating logical and physical changes. | |
33 | * | |
34 | * ex_vops2.c subroutines for operator interfaces in ex_vops.c, | |
35 | * insert mode, read input line processing at lowest level. | |
36 | * | |
37 | * ex_vops3.c structured motion definitions of ( ) { } and [ ] operators, | |
38 | * indent for lisp routines, () and {} balancing. | |
39 | * | |
40 | * ex_vput.c output routines, clearing, physical mapping of logical cursor | |
41 | * positioning, cursor motions, handling of insert character | |
42 | * and delete character functions of intelligent and unintelligent | |
43 | * terminals, visual mode tracing routines (for debugging), | |
44 | * control of screen image and its updating. | |
45 | * | |
46 | * ex_vwind.c window level control of display, forward and backward rolls, | |
47 | * absolute motions, contextual displays, line depth determination | |
48 | */ | |
49 | ||
50 | /* | |
51 | * Enter open mode | |
52 | */ | |
53 | oop() | |
54 | { | |
55 | register char *ic; | |
56 | char atube[TUBESIZE + LBSIZE]; | |
d266c416 | 57 | register ttymode f; |
59ae3464 MH |
58 | |
59 | ovbeg(); | |
60 | if (peekchar() == '/') { | |
61 | ignore(compile(getchar(), 1)); | |
62 | savere(scanre); | |
63 | if (execute(0, dot) == 0) | |
64 | error("Fail|Pattern not found on addressed line"); | |
65 | ic = loc1; | |
66 | if (ic > linebuf && *ic == 0) | |
67 | ic--; | |
68 | } else { | |
69 | getDOT(); | |
70 | ic = vskipwh(linebuf); | |
71 | } | |
72 | newline(); | |
73 | ||
74 | /* | |
75 | * If overstrike then have to HARDOPEN | |
76 | * else if can move cursor up off current line can use CRTOPEN (~~vi1) | |
77 | * otherwise (ugh) have to use ONEOPEN (like adm3) | |
78 | */ | |
79 | if (OS && !EO) | |
80 | bastate = HARDOPEN; | |
81 | else if (CA || UP) | |
82 | bastate = CRTOPEN; | |
83 | else | |
84 | bastate = ONEOPEN; | |
85 | setwind(); | |
86 | ||
87 | /* | |
88 | * To avoid bombing on glass-crt's when the line is too long | |
89 | * pretend that such terminals are 160 columns wide. | |
90 | * If a line is too wide for display, we will dynamically | |
91 | * switch to hardcopy open mode. | |
92 | */ | |
93 | if (state != CRTOPEN) | |
94 | WCOLS = TUBECOLS; | |
95 | if (!inglobal) | |
96 | savevis(); | |
97 | vok(atube); | |
98 | if (state != CRTOPEN) | |
99 | COLUMNS = WCOLS; | |
100 | Outchar = vputchar; | |
101 | f = ostart(); | |
102 | if (state == CRTOPEN) { | |
103 | if (outcol == UKCOL) | |
104 | outcol = 0; | |
105 | vmoveitup(1, 1); | |
106 | } else | |
107 | outline = destline = WBOT; | |
108 | vshow(dot, NOLINE); | |
109 | vnline(ic); | |
110 | vmain(); | |
111 | if (state != CRTOPEN) | |
112 | vclean(); | |
113 | Command = "open"; | |
114 | ovend(f); | |
115 | } | |
116 | ||
117 | ovbeg() | |
118 | { | |
119 | ||
120 | if (!value(OPEN)) | |
121 | error("Can't use open/visual unless open option is set"); | |
122 | if (inopen) | |
123 | error("Recursive open/visual not allowed"); | |
124 | Vlines = lineDOL(); | |
125 | fixzero(); | |
126 | setdot(); | |
127 | pastwh(); | |
128 | dot = addr2; | |
129 | } | |
130 | ||
131 | ovend(f) | |
d266c416 | 132 | ttymode f; |
59ae3464 MH |
133 | { |
134 | ||
135 | splitw++; | |
136 | vgoto(WECHO, 0); | |
137 | vclreol(); | |
138 | vgoto(WECHO, 0); | |
139 | holdcm = 0; | |
140 | splitw = 0; | |
141 | ostop(f); | |
142 | setoutt(); | |
143 | undvis(); | |
144 | COLUMNS = OCOLUMNS; | |
145 | inopen = 0; | |
146 | flusho(); | |
147 | netchHAD(Vlines); | |
148 | } | |
149 | ||
150 | /* | |
151 | * Enter visual mode | |
152 | */ | |
153 | vop() | |
154 | { | |
155 | register int c; | |
156 | char atube[TUBESIZE + LBSIZE]; | |
d266c416 | 157 | register ttymode f; |
59ae3464 MH |
158 | |
159 | if (!CA && UP == NOSTR) { | |
160 | if (initev) { | |
161 | toopen: | |
162 | merror("[Using open mode]"); | |
163 | putNFL(); | |
164 | oop(); | |
165 | return; | |
166 | } | |
167 | error("Visual needs addressible cursor or upline capability"); | |
168 | } | |
169 | if (OS && !EO) { | |
170 | if (initev) | |
171 | goto toopen; | |
172 | error("Can't use visual on a terminal which overstrikes"); | |
173 | } | |
174 | if (!CL) { | |
175 | if (initev) | |
176 | goto toopen; | |
177 | error("Visual requires clear screen capability"); | |
178 | } | |
d266c416 MH |
179 | if (NS && !SF) { |
180 | if (initev) | |
181 | goto toopen; | |
182 | error("Visual requires scrolling"); | |
183 | } | |
59ae3464 MH |
184 | ovbeg(); |
185 | bastate = VISUAL; | |
186 | c = 0; | |
187 | if (any(peekchar(), "+-^.")) | |
188 | c = getchar(); | |
189 | pastwh(); | |
190 | vsetsiz(isdigit(peekchar()) ? getnum() : value(WINDOW)); | |
191 | setwind(); | |
192 | newline(); | |
193 | vok(atube); | |
194 | if (!inglobal) | |
195 | savevis(); | |
196 | Outchar = vputchar; | |
197 | vmoving = 0; | |
198 | f = ostart(); | |
199 | if (initev == 0) { | |
200 | vcontext(dot, c); | |
201 | vnline(NOSTR); | |
202 | } | |
203 | vmain(); | |
204 | Command = "visual"; | |
205 | ovend(f); | |
206 | } | |
207 | ||
208 | /* | |
209 | * Hack to allow entry to visual with | |
210 | * empty buffer since routines internally | |
211 | * demand at least one line. | |
212 | */ | |
213 | fixzero() | |
214 | { | |
215 | ||
216 | if (dol == zero) { | |
217 | register bool ochng = chng; | |
218 | ||
219 | vdoappend(""); | |
220 | if (!ochng) | |
221 | sync(); | |
222 | addr1 = addr2 = one; | |
223 | } else if (addr2 == zero) | |
224 | addr2 = one; | |
225 | } | |
226 | ||
227 | /* | |
228 | * Save lines before visual between unddol and truedol. | |
229 | * Accomplish this by throwing away current [unddol,truedol] | |
230 | * and then saving all the lines in the buffer and moving | |
231 | * unddol back to dol. Don't do this if in a global. | |
232 | * | |
233 | * If you do | |
234 | * g/xxx/vi. | |
235 | * and then do a | |
236 | * :e xxxx | |
237 | * at some point, and then quit from the visual and undo | |
238 | * you get the old file back. Somewhat weird. | |
239 | */ | |
240 | savevis() | |
241 | { | |
242 | ||
243 | if (inglobal) | |
244 | return; | |
245 | truedol = unddol; | |
246 | saveall(); | |
247 | unddol = dol; | |
248 | undkind = UNDNONE; | |
249 | } | |
250 | ||
251 | /* | |
252 | * Restore a sensible state after a visual/open, moving the saved | |
253 | * stuff back to [unddol,dol], and killing the partial line kill indicators. | |
254 | */ | |
255 | undvis() | |
256 | { | |
257 | ||
258 | if (ruptible) | |
259 | signal(SIGINT, onintr); | |
260 | squish(); | |
261 | pkill[0] = pkill[1] = 0; | |
262 | unddol = truedol; | |
263 | unddel = zero; | |
264 | undap1 = one; | |
265 | undap2 = dol + 1; | |
266 | undkind = UNDALL; | |
d266c416 MH |
267 | if (undadot <= zero || undadot > dol) |
268 | undadot = zero+1; | |
59ae3464 MH |
269 | } |
270 | ||
271 | /* | |
272 | * Set the window parameters based on the base state bastate | |
273 | * and the available buffer space. | |
274 | */ | |
275 | setwind() | |
276 | { | |
277 | ||
278 | WCOLS = COLUMNS; | |
279 | switch (bastate) { | |
280 | ||
281 | case ONEOPEN: | |
282 | if (AM) | |
283 | WCOLS--; | |
284 | /* fall into ... */ | |
285 | ||
286 | case HARDOPEN: | |
287 | basWTOP = WTOP = WBOT = WECHO = 0; | |
288 | ZERO = 0; | |
289 | holdcm++; | |
290 | break; | |
291 | ||
292 | case CRTOPEN: | |
293 | basWTOP = LINES - 2; | |
294 | /* fall into */ | |
295 | ||
296 | case VISUAL: | |
297 | ZERO = LINES - TUBESIZE / WCOLS; | |
298 | if (ZERO < 0) | |
299 | ZERO = 0; | |
300 | if (ZERO > basWTOP) | |
301 | error("Screen too large for internal buffer"); | |
302 | WTOP = basWTOP; WBOT = LINES - 2; WECHO = LINES - 1; | |
303 | break; | |
304 | } | |
305 | state = bastate; | |
306 | basWLINES = WLINES = WBOT - WTOP + 1; | |
307 | } | |
308 | ||
309 | /* | |
310 | * Can we hack an open/visual on this terminal? | |
311 | * If so, then divide the screen buffer up into lines, | |
312 | * and initialize a bunch of state variables before we start. | |
313 | */ | |
314 | vok(atube) | |
315 | register char *atube; | |
316 | { | |
317 | register int i; | |
318 | ||
319 | if (WCOLS == 1000) | |
320 | serror("Don't know enough about your terminal to use %s", Command); | |
321 | if (WCOLS > TUBECOLS) | |
322 | error("Terminal too wide"); | |
323 | if (WLINES >= TUBELINES || WCOLS * (WECHO - ZERO + 1) > TUBESIZE) | |
324 | error("Screen too large"); | |
325 | ||
326 | vtube0 = atube; | |
327 | vclrbyte(atube, WCOLS * (WECHO - ZERO + 1)); | |
328 | for (i = 0; i < ZERO; i++) | |
887e3e0d | 329 | vtube[i] = (char *) 0; |
59ae3464 MH |
330 | for (; i <= WECHO; i++) |
331 | vtube[i] = atube, atube += WCOLS; | |
332 | for (; i < TUBELINES; i++) | |
887e3e0d | 333 | vtube[i] = (char *) 0; |
59ae3464 MH |
334 | vutmp = atube; |
335 | vundkind = VNONE; | |
336 | vUNDdot = 0; | |
337 | OCOLUMNS = COLUMNS; | |
338 | inopen = 1; | |
339 | #ifdef CBREAK | |
340 | signal(SIGINT, vintr); | |
341 | #endif | |
342 | vmoving = 0; | |
343 | splitw = 0; | |
344 | doomed = 0; | |
345 | holdupd = 0; | |
346 | Peekkey = 0; | |
347 | vcnt = vcline = 0; | |
348 | if (vSCROLL == 0) | |
349 | vSCROLL = (value(WINDOW)+1)/2; /* round up so dft=6,11 */ | |
350 | } | |
351 | ||
352 | #ifdef CBREAK | |
353 | vintr() | |
354 | { | |
355 | ||
356 | signal(SIGINT, vintr); | |
357 | if (vcatch) | |
358 | onintr(); | |
359 | ungetkey(ATTN); | |
360 | draino(); | |
361 | } | |
362 | #endif | |
363 | ||
364 | /* | |
365 | * Set the size of the screen to size lines, to take effect the | |
366 | * next time the screen is redrawn. | |
367 | */ | |
368 | vsetsiz(size) | |
369 | int size; | |
370 | { | |
371 | register int b; | |
372 | ||
373 | if (bastate != VISUAL) | |
374 | return; | |
375 | b = LINES - 1 - size; | |
376 | if (b >= LINES - 1) | |
377 | b = LINES - 2; | |
378 | if (b < 0) | |
379 | b = 0; | |
380 | basWTOP = b; | |
381 | basWLINES = WBOT - b + 1; | |
382 | } |