Commit | Line | Data |
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299f2784 | 1 | /* Copyright (c) 1981 Regents of the University of California */ |
3c7b865a | 2 | static char *sccsid = "@(#)ex_v.c 7.2 %G%"; |
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 | */ | |
3c7b865a MH |
53 | #ifdef u370 |
54 | char atube[TUBESIZE+LBSIZE]; | |
55 | #endif | |
59ae3464 MH |
56 | oop() |
57 | { | |
58 | register char *ic; | |
3c7b865a | 59 | #ifndef u370 |
59ae3464 | 60 | char atube[TUBESIZE + LBSIZE]; |
3c7b865a | 61 | #endif |
299f2784 | 62 | ttymode f; /* mjm: was register */ |
59ae3464 MH |
63 | |
64 | ovbeg(); | |
65 | if (peekchar() == '/') { | |
66 | ignore(compile(getchar(), 1)); | |
67 | savere(scanre); | |
68 | if (execute(0, dot) == 0) | |
69 | error("Fail|Pattern not found on addressed line"); | |
70 | ic = loc1; | |
71 | if (ic > linebuf && *ic == 0) | |
72 | ic--; | |
73 | } else { | |
74 | getDOT(); | |
75 | ic = vskipwh(linebuf); | |
76 | } | |
77 | newline(); | |
78 | ||
79 | /* | |
80 | * If overstrike then have to HARDOPEN | |
81 | * else if can move cursor up off current line can use CRTOPEN (~~vi1) | |
82 | * otherwise (ugh) have to use ONEOPEN (like adm3) | |
83 | */ | |
84 | if (OS && !EO) | |
85 | bastate = HARDOPEN; | |
86 | else if (CA || UP) | |
87 | bastate = CRTOPEN; | |
88 | else | |
89 | bastate = ONEOPEN; | |
90 | setwind(); | |
91 | ||
92 | /* | |
93 | * To avoid bombing on glass-crt's when the line is too long | |
94 | * pretend that such terminals are 160 columns wide. | |
95 | * If a line is too wide for display, we will dynamically | |
96 | * switch to hardcopy open mode. | |
97 | */ | |
98 | if (state != CRTOPEN) | |
99 | WCOLS = TUBECOLS; | |
100 | if (!inglobal) | |
101 | savevis(); | |
102 | vok(atube); | |
103 | if (state != CRTOPEN) | |
104 | COLUMNS = WCOLS; | |
105 | Outchar = vputchar; | |
106 | f = ostart(); | |
107 | if (state == CRTOPEN) { | |
108 | if (outcol == UKCOL) | |
109 | outcol = 0; | |
110 | vmoveitup(1, 1); | |
111 | } else | |
112 | outline = destline = WBOT; | |
113 | vshow(dot, NOLINE); | |
114 | vnline(ic); | |
115 | vmain(); | |
116 | if (state != CRTOPEN) | |
117 | vclean(); | |
118 | Command = "open"; | |
119 | ovend(f); | |
120 | } | |
121 | ||
122 | ovbeg() | |
123 | { | |
124 | ||
125 | if (!value(OPEN)) | |
126 | error("Can't use open/visual unless open option is set"); | |
127 | if (inopen) | |
128 | error("Recursive open/visual not allowed"); | |
129 | Vlines = lineDOL(); | |
130 | fixzero(); | |
131 | setdot(); | |
132 | pastwh(); | |
133 | dot = addr2; | |
134 | } | |
135 | ||
136 | ovend(f) | |
d266c416 | 137 | ttymode f; |
59ae3464 MH |
138 | { |
139 | ||
140 | splitw++; | |
141 | vgoto(WECHO, 0); | |
142 | vclreol(); | |
143 | vgoto(WECHO, 0); | |
144 | holdcm = 0; | |
145 | splitw = 0; | |
146 | ostop(f); | |
147 | setoutt(); | |
148 | undvis(); | |
149 | COLUMNS = OCOLUMNS; | |
150 | inopen = 0; | |
151 | flusho(); | |
152 | netchHAD(Vlines); | |
153 | } | |
154 | ||
155 | /* | |
156 | * Enter visual mode | |
157 | */ | |
158 | vop() | |
159 | { | |
160 | register int c; | |
3c7b865a | 161 | #ifndef u370 |
59ae3464 | 162 | char atube[TUBESIZE + LBSIZE]; |
3c7b865a | 163 | #endif |
299f2784 | 164 | ttymode f; /* mjm: was register */ |
59ae3464 MH |
165 | |
166 | if (!CA && UP == NOSTR) { | |
167 | if (initev) { | |
168 | toopen: | |
169 | merror("[Using open mode]"); | |
170 | putNFL(); | |
171 | oop(); | |
172 | return; | |
173 | } | |
174 | error("Visual needs addressible cursor or upline capability"); | |
175 | } | |
176 | if (OS && !EO) { | |
177 | if (initev) | |
178 | goto toopen; | |
179 | error("Can't use visual on a terminal which overstrikes"); | |
180 | } | |
181 | if (!CL) { | |
182 | if (initev) | |
183 | goto toopen; | |
184 | error("Visual requires clear screen capability"); | |
185 | } | |
d266c416 MH |
186 | if (NS && !SF) { |
187 | if (initev) | |
188 | goto toopen; | |
189 | error("Visual requires scrolling"); | |
190 | } | |
59ae3464 MH |
191 | ovbeg(); |
192 | bastate = VISUAL; | |
193 | c = 0; | |
194 | if (any(peekchar(), "+-^.")) | |
195 | c = getchar(); | |
196 | pastwh(); | |
197 | vsetsiz(isdigit(peekchar()) ? getnum() : value(WINDOW)); | |
198 | setwind(); | |
199 | newline(); | |
200 | vok(atube); | |
201 | if (!inglobal) | |
202 | savevis(); | |
203 | Outchar = vputchar; | |
204 | vmoving = 0; | |
205 | f = ostart(); | |
206 | if (initev == 0) { | |
207 | vcontext(dot, c); | |
208 | vnline(NOSTR); | |
209 | } | |
210 | vmain(); | |
211 | Command = "visual"; | |
212 | ovend(f); | |
213 | } | |
214 | ||
215 | /* | |
216 | * Hack to allow entry to visual with | |
217 | * empty buffer since routines internally | |
218 | * demand at least one line. | |
219 | */ | |
220 | fixzero() | |
221 | { | |
222 | ||
223 | if (dol == zero) { | |
224 | register bool ochng = chng; | |
225 | ||
226 | vdoappend(""); | |
227 | if (!ochng) | |
228 | sync(); | |
229 | addr1 = addr2 = one; | |
230 | } else if (addr2 == zero) | |
231 | addr2 = one; | |
232 | } | |
233 | ||
234 | /* | |
235 | * Save lines before visual between unddol and truedol. | |
236 | * Accomplish this by throwing away current [unddol,truedol] | |
237 | * and then saving all the lines in the buffer and moving | |
238 | * unddol back to dol. Don't do this if in a global. | |
239 | * | |
240 | * If you do | |
241 | * g/xxx/vi. | |
242 | * and then do a | |
243 | * :e xxxx | |
244 | * at some point, and then quit from the visual and undo | |
245 | * you get the old file back. Somewhat weird. | |
246 | */ | |
247 | savevis() | |
248 | { | |
249 | ||
250 | if (inglobal) | |
251 | return; | |
252 | truedol = unddol; | |
253 | saveall(); | |
254 | unddol = dol; | |
255 | undkind = UNDNONE; | |
256 | } | |
257 | ||
258 | /* | |
259 | * Restore a sensible state after a visual/open, moving the saved | |
260 | * stuff back to [unddol,dol], and killing the partial line kill indicators. | |
261 | */ | |
262 | undvis() | |
263 | { | |
264 | ||
265 | if (ruptible) | |
266 | signal(SIGINT, onintr); | |
267 | squish(); | |
268 | pkill[0] = pkill[1] = 0; | |
269 | unddol = truedol; | |
270 | unddel = zero; | |
271 | undap1 = one; | |
272 | undap2 = dol + 1; | |
273 | undkind = UNDALL; | |
d266c416 MH |
274 | if (undadot <= zero || undadot > dol) |
275 | undadot = zero+1; | |
59ae3464 MH |
276 | } |
277 | ||
278 | /* | |
279 | * Set the window parameters based on the base state bastate | |
280 | * and the available buffer space. | |
281 | */ | |
282 | setwind() | |
283 | { | |
284 | ||
285 | WCOLS = COLUMNS; | |
286 | switch (bastate) { | |
287 | ||
288 | case ONEOPEN: | |
289 | if (AM) | |
290 | WCOLS--; | |
291 | /* fall into ... */ | |
292 | ||
293 | case HARDOPEN: | |
294 | basWTOP = WTOP = WBOT = WECHO = 0; | |
295 | ZERO = 0; | |
296 | holdcm++; | |
297 | break; | |
298 | ||
299 | case CRTOPEN: | |
300 | basWTOP = LINES - 2; | |
301 | /* fall into */ | |
302 | ||
303 | case VISUAL: | |
304 | ZERO = LINES - TUBESIZE / WCOLS; | |
305 | if (ZERO < 0) | |
306 | ZERO = 0; | |
307 | if (ZERO > basWTOP) | |
308 | error("Screen too large for internal buffer"); | |
309 | WTOP = basWTOP; WBOT = LINES - 2; WECHO = LINES - 1; | |
310 | break; | |
311 | } | |
312 | state = bastate; | |
313 | basWLINES = WLINES = WBOT - WTOP + 1; | |
314 | } | |
315 | ||
316 | /* | |
317 | * Can we hack an open/visual on this terminal? | |
318 | * If so, then divide the screen buffer up into lines, | |
319 | * and initialize a bunch of state variables before we start. | |
320 | */ | |
321 | vok(atube) | |
322 | register char *atube; | |
323 | { | |
324 | register int i; | |
325 | ||
326 | if (WCOLS == 1000) | |
327 | serror("Don't know enough about your terminal to use %s", Command); | |
328 | if (WCOLS > TUBECOLS) | |
329 | error("Terminal too wide"); | |
330 | if (WLINES >= TUBELINES || WCOLS * (WECHO - ZERO + 1) > TUBESIZE) | |
331 | error("Screen too large"); | |
332 | ||
333 | vtube0 = atube; | |
334 | vclrbyte(atube, WCOLS * (WECHO - ZERO + 1)); | |
335 | for (i = 0; i < ZERO; i++) | |
887e3e0d | 336 | vtube[i] = (char *) 0; |
59ae3464 MH |
337 | for (; i <= WECHO; i++) |
338 | vtube[i] = atube, atube += WCOLS; | |
339 | for (; i < TUBELINES; i++) | |
887e3e0d | 340 | vtube[i] = (char *) 0; |
59ae3464 MH |
341 | vutmp = atube; |
342 | vundkind = VNONE; | |
343 | vUNDdot = 0; | |
344 | OCOLUMNS = COLUMNS; | |
345 | inopen = 1; | |
346 | #ifdef CBREAK | |
347 | signal(SIGINT, vintr); | |
348 | #endif | |
349 | vmoving = 0; | |
350 | splitw = 0; | |
351 | doomed = 0; | |
352 | holdupd = 0; | |
353 | Peekkey = 0; | |
354 | vcnt = vcline = 0; | |
355 | if (vSCROLL == 0) | |
356 | vSCROLL = (value(WINDOW)+1)/2; /* round up so dft=6,11 */ | |
357 | } | |
358 | ||
359 | #ifdef CBREAK | |
360 | vintr() | |
361 | { | |
362 | ||
363 | signal(SIGINT, vintr); | |
364 | if (vcatch) | |
365 | onintr(); | |
366 | ungetkey(ATTN); | |
367 | draino(); | |
368 | } | |
369 | #endif | |
370 | ||
371 | /* | |
372 | * Set the size of the screen to size lines, to take effect the | |
373 | * next time the screen is redrawn. | |
374 | */ | |
375 | vsetsiz(size) | |
376 | int size; | |
377 | { | |
378 | register int b; | |
379 | ||
380 | if (bastate != VISUAL) | |
381 | return; | |
382 | b = LINES - 1 - size; | |
383 | if (b >= LINES - 1) | |
384 | b = LINES - 2; | |
385 | if (b < 0) | |
386 | b = 0; | |
387 | basWTOP = b; | |
388 | basWLINES = WBOT - b + 1; | |
389 | } |