/*
* Enter visual mode
*/
void
vop(void)
{
register int c;
#if 0
char atube[TUBESIZE + LBSIZE];
#endif
ttymode f; /* mjm: was register */
if (!CA && UP == NOSTR) {
if (initev) {
toopen:
merror("[Using open mode]");
putNFL();
oop();
return;
}
error("Visual needs addressible cursor or upline capability");
}
if (OS && !EO) {
if (initev)
goto toopen;
error("Can't use visual on a terminal which overstrikes");
}
if (!CL) {
if (initev)
goto toopen;
error("Visual requires clear screen capability");
}
if (NS && !SF) {
if (initev)
goto toopen;
error("Visual requires scrolling");
}
ovbeg();
bastate = VISUAL;
c = 0;
if (any(peekchar(), "+-^."))
c = ex_getchar();
pastwh();
vsetsiz(isdigit(peekchar()) ? getnum() : value(WINDOW));
setwind();
ex_newline();
vok(atube);
if (!inglobal)
savevis();
Outchar = vputchar;
vmoving = 0;
f = ostart();
if (initev == 0) {
vcontext(dot, c);
vnline(NOSTR);
}
vmain();
Command = "visual";
ovend(f);
}
/*
* Repaint the screen, with cursor at curs, aftern an arbitrary change.
* Handle notification on large changes.
*/
void
vrepaint(char *curs)
{
wdot = NOLINE;
/*
* In open want to notify first.
*/
noteit(0);
vscrap();
/*
* Deal with a totally useless display.
*/
if (vcnt == 0 || vcline < 0 || vcline > vcnt || holdupd && state != VISUAL) {
register line *odol = dol;
vcnt = 0;
if (holdupd)
if (state == VISUAL)
ignore(peekkey());
else
vup1();
holdupd = 0;
if (odol == zero)
fixzero();
vcontext(dot, '.');
noteit(1);
if (noteit(1) == 0 && odol == zero) {
CATCH
error(catgets(catd, 1, 220,
"No lines in buffer"));
ENDCATCH
linebuf[0] = 0;
splitw = 0;
}
vnline(curs);
return;
}
/*
* Have some useful displayed text; refresh it.
*/
getDOT();
/*
* This is for boundary conditions in open mode.
*/
if (FLAGS(0) & VDIRT)
vsync(WTOP);
/*
* If the current line is after the last displayed line
* or the bottom of the screen, then special effort is needed
* to get it on the screen. We first try a redraw at the
* last line on the screen, hoping it will fill in where @
* lines are now. If this doesn't work, then roll it onto
* the screen.
*/
if (vcline >= vcnt || LINE(vcline) > WBOT) {
short oldhold = hold;
hold |= HOLDAT, vredraw(LASTLINE), hold = oldhold;
if (vcline >= vcnt) {
register int i = vcline - vcnt + 1;
dot -= i;
vcline -= i;
vroll(i);
} else
vsyncCL();
} else
vsync(vcline > 0 ? LINE(vcline - 1) : WTOP);
/*
* Notification on large change for visual
* has to be done last or we may lose
* the echo area with redisplay.
*/
noteit(1);
/*
* Finally. Move the cursor onto the current line.
*/
vnline(curs);
}
