Commit | Line | Data |
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59ae3464 MH |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
2 | #include "ex.h" | |
3 | #include "ex_re.h" | |
4 | #include "ex_tty.h" | |
5 | #include "ex_vis.h" | |
6 | ||
7 | /* | |
8 | * Entry points to open and visual from command mode processor. | |
9 | * The open/visual code breaks down roughly as follows: | |
10 | * | |
11 | * ex_v.c entry points, checking of terminal characteristics | |
12 | * | |
13 | * ex_vadj.c logical screen control, use of intelligent operations | |
14 | * insert/delete line and coordination with screen image; | |
15 | * updating of screen after changes. | |
16 | * | |
17 | * ex_vget.c input of single keys and reading of input lines | |
18 | * from the echo area, handling of \ escapes on input for | |
19 | * uppercase only terminals, handling of memory for repeated | |
20 | * commands and small saved texts from inserts and partline | |
21 | * deletes, notification of multi line changes in the echo | |
22 | * area. | |
23 | * | |
24 | * ex_vmain.c main command decoding, some command processing. | |
25 | * | |
26 | * ex_voperate.c decoding of operator/operand sequences and | |
27 | * contextual scans, implementation of word motions. | |
28 | * | |
29 | * ex_vops.c major operator interfaces, undos, motions, deletes, | |
30 | * changes, opening new lines, shifts, replacements and yanks | |
31 | * coordinating logical and physical changes. | |
32 | * | |
33 | * ex_vops2.c subroutines for operator interfaces in ex_vops.c, | |
34 | * insert mode, read input line processing at lowest level. | |
35 | * | |
36 | * ex_vops3.c structured motion definitions of ( ) { } and [ ] operators, | |
37 | * indent for lisp routines, () and {} balancing. | |
38 | * | |
39 | * ex_vput.c output routines, clearing, physical mapping of logical cursor | |
40 | * positioning, cursor motions, handling of insert character | |
41 | * and delete character functions of intelligent and unintelligent | |
42 | * terminals, visual mode tracing routines (for debugging), | |
43 | * control of screen image and its updating. | |
44 | * | |
45 | * ex_vwind.c window level control of display, forward and backward rolls, | |
46 | * absolute motions, contextual displays, line depth determination | |
47 | */ | |
48 | ||
49 | /* | |
50 | * Enter open mode | |
51 | */ | |
52 | oop() | |
53 | { | |
54 | register char *ic; | |
55 | char atube[TUBESIZE + LBSIZE]; | |
56 | register int f; | |
57 | ||
58 | ovbeg(); | |
59 | if (peekchar() == '/') { | |
60 | ignore(compile(getchar(), 1)); | |
61 | savere(scanre); | |
62 | if (execute(0, dot) == 0) | |
63 | error("Fail|Pattern not found on addressed line"); | |
64 | ic = loc1; | |
65 | if (ic > linebuf && *ic == 0) | |
66 | ic--; | |
67 | } else { | |
68 | getDOT(); | |
69 | ic = vskipwh(linebuf); | |
70 | } | |
71 | newline(); | |
72 | ||
73 | /* | |
74 | * If overstrike then have to HARDOPEN | |
75 | * else if can move cursor up off current line can use CRTOPEN (~~vi1) | |
76 | * otherwise (ugh) have to use ONEOPEN (like adm3) | |
77 | */ | |
78 | if (OS && !EO) | |
79 | bastate = HARDOPEN; | |
80 | else if (CA || UP) | |
81 | bastate = CRTOPEN; | |
82 | else | |
83 | bastate = ONEOPEN; | |
84 | setwind(); | |
85 | ||
86 | /* | |
87 | * To avoid bombing on glass-crt's when the line is too long | |
88 | * pretend that such terminals are 160 columns wide. | |
89 | * If a line is too wide for display, we will dynamically | |
90 | * switch to hardcopy open mode. | |
91 | */ | |
92 | if (state != CRTOPEN) | |
93 | WCOLS = TUBECOLS; | |
94 | if (!inglobal) | |
95 | savevis(); | |
96 | vok(atube); | |
97 | if (state != CRTOPEN) | |
98 | COLUMNS = WCOLS; | |
99 | Outchar = vputchar; | |
100 | f = ostart(); | |
101 | if (state == CRTOPEN) { | |
102 | if (outcol == UKCOL) | |
103 | outcol = 0; | |
104 | vmoveitup(1, 1); | |
105 | } else | |
106 | outline = destline = WBOT; | |
107 | vshow(dot, NOLINE); | |
108 | vnline(ic); | |
109 | vmain(); | |
110 | if (state != CRTOPEN) | |
111 | vclean(); | |
112 | Command = "open"; | |
113 | ovend(f); | |
114 | } | |
115 | ||
116 | ovbeg() | |
117 | { | |
118 | ||
119 | if (!value(OPEN)) | |
120 | error("Can't use open/visual unless open option is set"); | |
121 | if (inopen) | |
122 | error("Recursive open/visual not allowed"); | |
123 | Vlines = lineDOL(); | |
124 | fixzero(); | |
125 | setdot(); | |
126 | pastwh(); | |
127 | dot = addr2; | |
128 | } | |
129 | ||
130 | ovend(f) | |
131 | int f; | |
132 | { | |
133 | ||
134 | splitw++; | |
135 | vgoto(WECHO, 0); | |
136 | vclreol(); | |
137 | vgoto(WECHO, 0); | |
138 | holdcm = 0; | |
139 | splitw = 0; | |
140 | ostop(f); | |
141 | setoutt(); | |
142 | undvis(); | |
143 | COLUMNS = OCOLUMNS; | |
144 | inopen = 0; | |
145 | flusho(); | |
146 | netchHAD(Vlines); | |
147 | } | |
148 | ||
149 | /* | |
150 | * Enter visual mode | |
151 | */ | |
152 | vop() | |
153 | { | |
154 | register int c; | |
155 | char atube[TUBESIZE + LBSIZE]; | |
156 | register int f; | |
157 | ||
158 | if (!CA && UP == NOSTR) { | |
159 | if (initev) { | |
160 | toopen: | |
161 | merror("[Using open mode]"); | |
162 | putNFL(); | |
163 | oop(); | |
164 | return; | |
165 | } | |
166 | error("Visual needs addressible cursor or upline capability"); | |
167 | } | |
168 | if (OS && !EO) { | |
169 | if (initev) | |
170 | goto toopen; | |
171 | error("Can't use visual on a terminal which overstrikes"); | |
172 | } | |
173 | if (!CL) { | |
174 | if (initev) | |
175 | goto toopen; | |
176 | error("Visual requires clear screen capability"); | |
177 | } | |
178 | ovbeg(); | |
179 | bastate = VISUAL; | |
180 | c = 0; | |
181 | if (any(peekchar(), "+-^.")) | |
182 | c = getchar(); | |
183 | pastwh(); | |
184 | vsetsiz(isdigit(peekchar()) ? getnum() : value(WINDOW)); | |
185 | setwind(); | |
186 | newline(); | |
187 | vok(atube); | |
188 | if (!inglobal) | |
189 | savevis(); | |
190 | Outchar = vputchar; | |
191 | vmoving = 0; | |
192 | f = ostart(); | |
193 | if (initev == 0) { | |
194 | vcontext(dot, c); | |
195 | vnline(NOSTR); | |
196 | } | |
197 | vmain(); | |
198 | Command = "visual"; | |
199 | ovend(f); | |
200 | } | |
201 | ||
202 | /* | |
203 | * Hack to allow entry to visual with | |
204 | * empty buffer since routines internally | |
205 | * demand at least one line. | |
206 | */ | |
207 | fixzero() | |
208 | { | |
209 | ||
210 | if (dol == zero) { | |
211 | register bool ochng = chng; | |
212 | ||
213 | vdoappend(""); | |
214 | if (!ochng) | |
215 | sync(); | |
216 | addr1 = addr2 = one; | |
217 | } else if (addr2 == zero) | |
218 | addr2 = one; | |
219 | } | |
220 | ||
221 | /* | |
222 | * Save lines before visual between unddol and truedol. | |
223 | * Accomplish this by throwing away current [unddol,truedol] | |
224 | * and then saving all the lines in the buffer and moving | |
225 | * unddol back to dol. Don't do this if in a global. | |
226 | * | |
227 | * If you do | |
228 | * g/xxx/vi. | |
229 | * and then do a | |
230 | * :e xxxx | |
231 | * at some point, and then quit from the visual and undo | |
232 | * you get the old file back. Somewhat weird. | |
233 | */ | |
234 | savevis() | |
235 | { | |
236 | ||
237 | if (inglobal) | |
238 | return; | |
239 | truedol = unddol; | |
240 | saveall(); | |
241 | unddol = dol; | |
242 | undkind = UNDNONE; | |
243 | } | |
244 | ||
245 | /* | |
246 | * Restore a sensible state after a visual/open, moving the saved | |
247 | * stuff back to [unddol,dol], and killing the partial line kill indicators. | |
248 | */ | |
249 | undvis() | |
250 | { | |
251 | ||
252 | if (ruptible) | |
253 | signal(SIGINT, onintr); | |
254 | squish(); | |
255 | pkill[0] = pkill[1] = 0; | |
256 | unddol = truedol; | |
257 | unddel = zero; | |
258 | undap1 = one; | |
259 | undap2 = dol + 1; | |
260 | undkind = UNDALL; | |
261 | } | |
262 | ||
263 | /* | |
264 | * Set the window parameters based on the base state bastate | |
265 | * and the available buffer space. | |
266 | */ | |
267 | setwind() | |
268 | { | |
269 | ||
270 | WCOLS = COLUMNS; | |
271 | switch (bastate) { | |
272 | ||
273 | case ONEOPEN: | |
274 | if (AM) | |
275 | WCOLS--; | |
276 | /* fall into ... */ | |
277 | ||
278 | case HARDOPEN: | |
279 | basWTOP = WTOP = WBOT = WECHO = 0; | |
280 | ZERO = 0; | |
281 | holdcm++; | |
282 | break; | |
283 | ||
284 | case CRTOPEN: | |
285 | basWTOP = LINES - 2; | |
286 | /* fall into */ | |
287 | ||
288 | case VISUAL: | |
289 | ZERO = LINES - TUBESIZE / WCOLS; | |
290 | if (ZERO < 0) | |
291 | ZERO = 0; | |
292 | if (ZERO > basWTOP) | |
293 | error("Screen too large for internal buffer"); | |
294 | WTOP = basWTOP; WBOT = LINES - 2; WECHO = LINES - 1; | |
295 | break; | |
296 | } | |
297 | state = bastate; | |
298 | basWLINES = WLINES = WBOT - WTOP + 1; | |
299 | } | |
300 | ||
301 | /* | |
302 | * Can we hack an open/visual on this terminal? | |
303 | * If so, then divide the screen buffer up into lines, | |
304 | * and initialize a bunch of state variables before we start. | |
305 | */ | |
306 | vok(atube) | |
307 | register char *atube; | |
308 | { | |
309 | register int i; | |
310 | ||
311 | if (WCOLS == 1000) | |
312 | serror("Don't know enough about your terminal to use %s", Command); | |
313 | if (WCOLS > TUBECOLS) | |
314 | error("Terminal too wide"); | |
315 | if (WLINES >= TUBELINES || WCOLS * (WECHO - ZERO + 1) > TUBESIZE) | |
316 | error("Screen too large"); | |
317 | ||
318 | vtube0 = atube; | |
319 | vclrbyte(atube, WCOLS * (WECHO - ZERO + 1)); | |
320 | for (i = 0; i < ZERO; i++) | |
887e3e0d | 321 | vtube[i] = (char *) 0; |
59ae3464 MH |
322 | for (; i <= WECHO; i++) |
323 | vtube[i] = atube, atube += WCOLS; | |
324 | for (; i < TUBELINES; i++) | |
887e3e0d | 325 | vtube[i] = (char *) 0; |
59ae3464 MH |
326 | vutmp = atube; |
327 | vundkind = VNONE; | |
328 | vUNDdot = 0; | |
329 | OCOLUMNS = COLUMNS; | |
330 | inopen = 1; | |
331 | #ifdef CBREAK | |
332 | signal(SIGINT, vintr); | |
333 | #endif | |
334 | vmoving = 0; | |
335 | splitw = 0; | |
336 | doomed = 0; | |
337 | holdupd = 0; | |
338 | Peekkey = 0; | |
339 | vcnt = vcline = 0; | |
340 | if (vSCROLL == 0) | |
341 | vSCROLL = (value(WINDOW)+1)/2; /* round up so dft=6,11 */ | |
342 | } | |
343 | ||
344 | #ifdef CBREAK | |
345 | vintr() | |
346 | { | |
347 | ||
348 | signal(SIGINT, vintr); | |
349 | if (vcatch) | |
350 | onintr(); | |
351 | ungetkey(ATTN); | |
352 | draino(); | |
353 | } | |
354 | #endif | |
355 | ||
356 | /* | |
357 | * Set the size of the screen to size lines, to take effect the | |
358 | * next time the screen is redrawn. | |
359 | */ | |
360 | vsetsiz(size) | |
361 | int size; | |
362 | { | |
363 | register int b; | |
364 | ||
365 | if (bastate != VISUAL) | |
366 | return; | |
367 | b = LINES - 1 - size; | |
368 | if (b >= LINES - 1) | |
369 | b = LINES - 2; | |
370 | if (b < 0) | |
371 | b = 0; | |
372 | basWTOP = b; | |
373 | basWLINES = WBOT - b + 1; | |
374 | } |