/*
* vs_update --
* Update a command.
*
* PUBLIC: void vs_update __P((SCR *, const char *, const CHAR_T *));
*/
void
vs_update(SCR *sp, const char *m1, const CHAR_T *m2)
{
GS *gp;
size_t len, mlen, oldx, oldy;
const char *np;
size_t nlen;
gp = sp->gp;
/*
* This routine displays a message on the bottom line of the screen,
* without updating any of the command structures that would keep it
* there for any period of time, i.e. it is overwritten immediately.
*
* It's used by the ex read and ! commands when the user's command is
* expanded, and by the ex substitution confirmation prompt.
*/
if (F_ISSET(sp, SC_SCR_EXWROTE)) {
if (m2 != NULL)
INT2CHAR(sp, m2, STRLEN(m2) + 1, np, nlen);
(void)ex_printf(sp,
"%s%s\n", m1 == NULL? "" : m1, m2 == NULL ? "" : np);
(void)ex_fflush(sp);
}
/*
* Save the cursor position, the substitute-with-confirmation code
* will have already set it correctly.
*/
(void)gp->scr_cursor(sp, &oldy, &oldx);
/* Clear the bottom line. */
(void)gp->scr_move(sp, LASTLINE(sp), 0);
(void)gp->scr_clrtoeol(sp);
/*
* XXX
* Don't let long file names screw up the screen.
*/
if (m1 != NULL) {
mlen = len = strlen(m1);
if (len > sp->cols - 2)
mlen = len = sp->cols - 2;
(void)gp->scr_addstr(sp, m1, mlen);
} else
len = 0;
if (m2 != NULL) {
mlen = STRLEN(m2);
if (len + mlen > sp->cols - 2)
mlen = (sp->cols - 2) - len;
(void)gp->scr_waddstr(sp, m2, mlen);
}
(void)gp->scr_move(sp, oldy, oldx);
(void)gp->scr_refresh(sp, 0);
}
/*
* vs_wait --
* Prompt the user to continue.
*/
static void
vs_wait(SCR *sp, int *continuep, sw_t wtype)
{
EVENT ev;
VI_PRIVATE *vip;
const char *p;
GS *gp;
size_t len;
gp = sp->gp;
vip = VIP(sp);
(void)gp->scr_move(sp, LASTLINE(sp), 0);
if (IS_ONELINE(sp))
p = msg_cmsg(sp, CMSG_CONT_S, &len);
else
switch (wtype) {
case SCROLL_W_QUIT:
p = msg_cmsg(sp, CMSG_CONT_Q, &len);
break;
case SCROLL_W_EX:
p = msg_cmsg(sp, CMSG_CONT_EX, &len);
break;
case SCROLL_W:
p = msg_cmsg(sp, CMSG_CONT, &len);
break;
default:
abort();
/* NOTREACHED */
}
(void)gp->scr_addstr(sp, p, len);
++vip->totalcount;
vip->linecount = 0;
(void)gp->scr_clrtoeol(sp);
(void)gp->scr_refresh(sp, 0);
/* Get a single character from the terminal. */
if (continuep != NULL)
*continuep = 0;
for (;;) {
if (v_event_get(sp, &ev, 0, 0))
return;
if (ev.e_event == E_CHARACTER)
break;
if (ev.e_event == E_INTERRUPT) {
ev.e_c = CH_QUIT;
F_SET(gp, G_INTERRUPTED);
break;
}
(void)gp->scr_bell(sp);
}
switch (wtype) {
case SCROLL_W_QUIT:
if (ev.e_c == CH_QUIT)
F_SET(gp, G_INTERRUPTED);
break;
case SCROLL_W_EX:
if (ev.e_c == ':' && continuep != NULL)
*continuep = 1;
break;
case SCROLL_W:
break;
}
}
/*
* vs_busy --
* Display, update or clear a busy message.
*
* This routine is the default editor interface for vi busy messages. It
* implements a standard strategy of stealing lines from the bottom of the
* vi text screen. Screens using an alternate method of displaying busy
* messages, e.g. X11 clock icons, should set their scr_busy function to the
* correct function before calling the main editor routine.
*
* PUBLIC: void vs_busy __P((SCR *, const char *, busy_t));
*/
void
vs_busy(SCR *sp, const char *msg, busy_t btype)
{
GS *gp;
VI_PRIVATE *vip;
static const char flagc[] = "|/-\\";
struct timeval tv;
size_t len, notused;
const char *p;
/* Ex doesn't display busy messages. */
if (F_ISSET(sp, SC_EX | SC_SCR_EXWROTE))
return;
gp = sp->gp;
vip = VIP(sp);
/*
* Most of this routine is to deal with the screen sharing real estate
* between the normal edit messages and the busy messages. Logically,
* all that's needed is something that puts up a message, periodically
* updates it, and then goes away.
*/
switch (btype) {
case BUSY_ON:
++vip->busy_ref;
if (vip->totalcount != 0 || vip->busy_ref != 1)
break;
/* Initialize state for updates. */
vip->busy_ch = 0;
(void)gettimeofday(&vip->busy_tv, NULL);
/* Save the current cursor. */
(void)gp->scr_cursor(sp, &vip->busy_oldy, &vip->busy_oldx);
/* Display the busy message. */
p = msg_cat(sp, msg, &len);
(void)gp->scr_move(sp, LASTLINE(sp), 0);
(void)gp->scr_addstr(sp, p, len);
(void)gp->scr_cursor(sp, ¬used, &vip->busy_fx);
(void)gp->scr_clrtoeol(sp);
(void)gp->scr_move(sp, LASTLINE(sp), vip->busy_fx);
break;
case BUSY_OFF:
if (vip->busy_ref == 0)
break;
--vip->busy_ref;
/*
* If the line isn't in use for another purpose, clear it.
* Always return to the original position.
*/
if (vip->totalcount == 0 && vip->busy_ref == 0) {
(void)gp->scr_move(sp, LASTLINE(sp), 0);
(void)gp->scr_clrtoeol(sp);
}
(void)gp->scr_move(sp, vip->busy_oldy, vip->busy_oldx);
break;
case BUSY_UPDATE:
if (vip->totalcount != 0 || vip->busy_ref == 0)
break;
/* Update no more than every 1/8 of a second. */
(void)gettimeofday(&tv, NULL);
if (((tv.tv_sec - vip->busy_tv.tv_sec) * 1000000 +
(tv.tv_usec - vip->busy_tv.tv_usec)) < 125000)
return;
vip->busy_tv = tv;
/* Display the update. */
if (vip->busy_ch == sizeof(flagc) - 1)
vip->busy_ch = 0;
(void)gp->scr_move(sp, LASTLINE(sp), vip->busy_fx);
(void)gp->scr_addstr(sp, flagc + vip->busy_ch++, 1);
(void)gp->scr_move(sp, LASTLINE(sp), vip->busy_fx);
break;
}
(void)gp->scr_refresh(sp, 0);
}
/*
* vs_msg --
* Display ex output or error messages for the screen.
*
* This routine is the default editor interface for all ex output, and all ex
* and vi error/informational messages. It implements the standard strategy
* of stealing lines from the bottom of the vi text screen. Screens using an
* alternate method of displaying messages, e.g. dialog boxes, should set their
* scr_msg function to the correct function before calling the editor.
*
* PUBLIC: void vs_msg __P((SCR *, mtype_t, char *, size_t));
*/
void
vs_msg(SCR *sp, mtype_t mtype, char *line, size_t len)
{
GS *gp;
VI_PRIVATE *vip;
size_t maxcols, oldx, oldy, padding;
const char *e, *s, *t;
gp = sp->gp;
vip = VIP(sp);
/*
* Ring the bell if it's scheduled.
*
* XXX
* Shouldn't we save this, too?
*/
if (F_ISSET(sp, SC_TINPUT_INFO) || F_ISSET(gp, G_BELLSCHED)) {
if (F_ISSET(sp, SC_SCR_VI)) {
F_CLR(gp, G_BELLSCHED);
(void)gp->scr_bell(sp);
} else
F_SET(gp, G_BELLSCHED);
}
/*
* If vi is using the error line for text input, there's no screen
* real-estate for the error message. Nothing to do without some
* information as to how important the error message is.
*/
if (F_ISSET(sp, SC_TINPUT_INFO))
return;
/*
* Ex or ex controlled screen output.
*
* If output happens during startup, e.g., a .exrc file, we may be
* in ex mode but haven't initialized the screen. Initialize here,
* and in this case, stay in ex mode.
*
* If the SC_SCR_EXWROTE bit is set, then we're switching back and
* forth between ex and vi, but the screen is trashed and we have
* to respect that. Switch to ex mode long enough to put out the
* message.
*
* If the SC_EX_WAIT_NO bit is set, turn it off -- we're writing to
* the screen, so previous opinions are ignored.
*/
if (F_ISSET(sp, SC_EX | SC_SCR_EXWROTE)) {
if (!F_ISSET(sp, SC_SCR_EX)) {
if (F_ISSET(sp, SC_SCR_EXWROTE)) {
if (sp->gp->scr_screen(sp, SC_EX))
return;
} else
if (ex_init(sp))
return;
}
if (mtype == M_ERR)
(void)gp->scr_attr(sp, SA_INVERSE, 1);
(void)printf("%.*s", (int)len, line);
if (mtype == M_ERR)
(void)gp->scr_attr(sp, SA_INVERSE, 0);
(void)fflush(stdout);
F_CLR(sp, SC_EX_WAIT_NO);
if (!F_ISSET(sp, SC_SCR_EX))
(void)sp->gp->scr_screen(sp, SC_VI);
return;
}
/* If the vi screen isn't ready, save the message. */
if (!F_ISSET(sp, SC_SCR_VI)) {
(void)vs_msgsave(sp, mtype, line, len);
return;
}
/* Save the cursor position. */
(void)gp->scr_cursor(sp, &oldy, &oldx);
/* If it's an ex output message, just write it out. */
if (mtype == M_NONE) {
vs_output(sp, mtype, line, len);
goto ret;
}
/*
* If it's a vi message, strip the trailing <newline> so we can
* try and paste messages together.
*/
if (line[len - 1] == '\n')
--len;
/*
* If a message won't fit on a single line, try to split on a <blank>.
* If a subsequent message fits on the same line, write a separator
* and output it. Otherwise, put out a newline.
*
* Need up to two padding characters normally; a semi-colon and a
* separating space. If only a single line on the screen, add some
* more for the trailing continuation message.
*
* XXX
* Assume that periods and semi-colons take up a single column on the
* screen.
*
* XXX
* There are almost certainly pathological cases that will break this
* code.
*/
if (IS_ONELINE(sp))
(void)msg_cmsg(sp, CMSG_CONT_S, &padding);
else
padding = 0;
padding += 2;
maxcols = sp->cols - 1;
if (vip->lcontinue != 0) {
if (len + vip->lcontinue + padding > maxcols)
vs_output(sp, vip->mtype, ".\n", 2);
else {
vs_output(sp, vip->mtype, ";", 1);
vs_output(sp, M_NONE, " ", 1);
}
}
vip->mtype = mtype;
for (s = line;; s = t) {
for (; len > 0 && isblank((unsigned char)*s); --len, ++s);
if (len == 0)
break;
if (len + vip->lcontinue > maxcols) {
for (e = s + (maxcols - vip->lcontinue);
e > s && !isblank((unsigned char)*e); --e);
if (e == s)
e = t = s + (maxcols - vip->lcontinue);
else
for (t = e; isblank((unsigned char)e[-1]); --e);
} else
e = t = s + len;
/*
* If the message ends in a period, discard it, we want to
* gang messages where possible.
*/
len -= t - s;
if (len == 0 && (e - s) > 1 && s[(e - s) - 1] == '.')
--e;
vs_output(sp, mtype, s, e - s);
if (len != 0)
vs_output(sp, M_NONE, "\n", 1);
if (INTERRUPTED(sp))
break;
}
ret: (void)gp->scr_move(sp, oldy, oldx);
(void)gp->scr_refresh(sp, 0);
}
