| 14 |
|
#include "selcall.h" |
| 15 |
|
#include <ctype.h> |
| 16 |
|
|
| 17 |
+ |
#ifndef VIEWHISTLEN |
| 18 |
+ |
#define VIEWHISTLEN 2 /* number of remembered views */ |
| 19 |
+ |
#endif |
| 20 |
+ |
|
| 21 |
|
HOLO *hdlist[HDMAX+1]; /* global holodeck list */ |
| 22 |
|
|
| 23 |
|
char cmdlist[DC_NCMDS][8] = DC_INIT; |
| 62 |
|
printview(); |
| 63 |
|
if (inp & DEV_NEWVIEW) |
| 64 |
|
new_view(&odev.v); |
| 65 |
+ |
if (inp & DEV_LASTVIEW) |
| 66 |
+ |
new_view(NULL); |
| 67 |
|
if (inp & DEV_SHUTDOWN) |
| 68 |
|
serv_request(DR_SHUTDOWN, 0, NULL); |
| 69 |
< |
if (inp & DEV_REDRAW) { |
| 70 |
< |
imm_mode = 1; /* preempt updates */ |
| 65 |
< |
beam_sync(); |
| 66 |
< |
} |
| 69 |
> |
if (inp & DEV_REDRAW) |
| 70 |
> |
imm_mode = beam_sync() > 0; |
| 71 |
|
if (inp & DEV_WAIT) |
| 72 |
|
pause = 1; |
| 73 |
|
if (inp & DEV_RESUME) { |
| 194 |
|
|
| 195 |
|
|
| 196 |
|
new_view(v) /* change view parameters */ |
| 197 |
< |
VIEW *v; |
| 197 |
> |
register VIEW *v; |
| 198 |
|
{ |
| 199 |
+ |
static VIEW viewhist[VIEWHISTLEN]; |
| 200 |
+ |
static unsigned nhist; |
| 201 |
|
char *err; |
| 202 |
< |
|
| 203 |
< |
do { |
| 204 |
< |
if ((err = setview(v)) != NULL) { |
| 205 |
< |
error(COMMAND, err); |
| 202 |
> |
/* restore previous view? */ |
| 203 |
> |
if (v == NULL) { |
| 204 |
> |
if (nhist < 2) { |
| 205 |
> |
error(COMMAND, "no previous view"); |
| 206 |
|
return; |
| 207 |
|
} |
| 208 |
< |
if (v->type == VT_PAR) { |
| 209 |
< |
error(COMMAND, "cannot handle parallel views"); |
| 210 |
< |
return; |
| 211 |
< |
} |
| 212 |
< |
dev_view(v); /* update display driver */ |
| 213 |
< |
dev_flush(); /* update screen */ |
| 214 |
< |
} while (!beam_view(v)); /* update beam list */ |
| 208 |
> |
nhist--; /* get one before last setting */ |
| 209 |
> |
v = viewhist + ((nhist-1)%VIEWHISTLEN); |
| 210 |
> |
} else if ((err = setview(v)) != NULL) { |
| 211 |
> |
error(COMMAND, err); |
| 212 |
> |
return; |
| 213 |
> |
} |
| 214 |
> |
again: |
| 215 |
> |
if (v->type == VT_PAR) { |
| 216 |
> |
error(COMMAND, "cannot handle parallel views"); |
| 217 |
> |
return; |
| 218 |
> |
} |
| 219 |
> |
if (!dev_view(v)) /* update display driver */ |
| 220 |
> |
goto again; |
| 221 |
> |
dev_flush(); /* update screen */ |
| 222 |
> |
if (!beam_view(v)) /* update beam list */ |
| 223 |
> |
goto again; |
| 224 |
> |
/* record new view */ |
| 225 |
> |
if (v < viewhist || v >= viewhist+VIEWHISTLEN) { |
| 226 |
> |
copystruct(viewhist + (nhist%VIEWHISTLEN), v); |
| 227 |
> |
nhist++; |
| 228 |
> |
} |
| 229 |
|
} |
| 230 |
|
|
| 231 |
|
|
| 265 |
|
break; |
| 266 |
|
case DC_GETVIEW: /* print the current view */ |
| 267 |
|
printview(); |
| 268 |
+ |
break; |
| 269 |
+ |
case DC_LASTVIEW: /* restore previous view */ |
| 270 |
+ |
new_view(NULL); |
| 271 |
|
break; |
| 272 |
|
case DC_PAUSE: /* pause the current calculation */ |
| 273 |
|
case DC_RESUME: /* resume the calculation */ |
