/*
* Ensures a buffer has not been modified elsewhere; e.g. on disk.
* Prompt the user if it has.
* Returns TRUE if it has NOT (i.e. buffer is ok to edit).
* FALSE or ABORT otherwise
*/
int
checkdirty(struct buffer *bp)
{
int s;
if ((bp->b_flag & (BFCHG | BFDIRTY)) == 0)
if (fchecktime(bp) != TRUE)
bp->b_flag |= BFDIRTY;
if ((bp->b_flag & (BFDIRTY | BFIGNDIRTY)) == BFDIRTY) {
s = eynorr("File changed on disk; really edit the buffer");
switch (s) {
case TRUE:
bp->b_flag &= ~BFDIRTY;
bp->b_flag |= BFIGNDIRTY;
return (TRUE);
case REVERT:
dorevert();
return (FALSE);
default:
return (s);
}
}
return (TRUE);
}
/*
* Display the given buffer in the given window. Flags indicated
* action on redisplay. Update modified flag so insert loop can check it.
*/
int
showbuffer(struct buffer *bp, struct mgwin *wp, int flags)
{
struct buffer *obp;
struct mgwin *owp;
/* Ensure file has not been modified elsewhere */
if (fchecktime(bp) != TRUE)
bp->b_flag |= BFDIRTY;
if (wp->w_bufp == bp) { /* Easy case! */
wp->w_rflag |= flags;
return (TRUE);
}
/* First, detach the old buffer from the window */
if ((bp->b_altb = obp = wp->w_bufp) != NULL) {
if (--obp->b_nwnd == 0) {
obp->b_dotp = wp->w_dotp;
obp->b_doto = wp->w_doto;
obp->b_markp = wp->w_markp;
obp->b_marko = wp->w_marko;
obp->b_dotline = wp->w_dotline;
obp->b_markline = wp->w_markline;
}
}
/* Now, attach the new buffer to the window */
wp->w_bufp = bp;
if (bp->b_nwnd++ == 0) { /* First use. */
wp->w_dotp = bp->b_dotp;
wp->w_doto = bp->b_doto;
wp->w_markp = bp->b_markp;
wp->w_marko = bp->b_marko;
wp->w_dotline = bp->b_dotline;
wp->w_markline = bp->b_markline;
} else
/* already on screen, steal values from other window */
for (owp = wheadp; owp != NULL; owp = wp->w_wndp)
if (wp->w_bufp == bp && owp != wp) {
wp->w_dotp = owp->w_dotp;
wp->w_doto = owp->w_doto;
wp->w_markp = owp->w_markp;
wp->w_marko = owp->w_marko;
wp->w_dotline = owp->w_dotline;
wp->w_markline = owp->w_markline;
break;
}
wp->w_rflag |= WFMODE | flags;
return (TRUE);
}
/*
* Save the contents of the buffer argument into its associated file. Do
* nothing if there have been no changes (is this a bug, or a feature?).
* Error if there is no remembered file name. If this is the first write
* since the read or visit, then a backup copy of the file is made.
* Allow user to select whether or not to make backup files by looking at
* the value of makebackup.
*/
int
buffsave(struct buffer *bp)
{
int s;
FILE *ffp;
/* return, no changes */
if ((bp->b_flag & BFCHG) == 0) {
ewprintf("(No changes need to be saved)");
return (TRUE);
}
/* must have a name */
if (bp->b_fname[0] == '\0') {
dobeep();
ewprintf("No file name");
return (FALSE);
}
/* Ensure file has not been modified elsewhere */
/* We don't use the ignore flag here */
if (fchecktime(bp) != TRUE) {
if ((s = eyesno("File has changed on disk since last save. "
"Save anyway")) != TRUE)
return (s);
}
if (makebackup && (bp->b_flag & BFBAK)) {
s = fbackupfile(bp->b_fname);
/* hard error */
if (s == ABORT)
return (FALSE);
/* softer error */
if (s == FALSE &&
(s = eyesno("Backup error, save anyway")) != TRUE)
return (s);
}
if ((s = writeout(&ffp, bp, bp->b_fname)) == TRUE) {
(void)fupdstat(bp);
bp->b_flag &= ~(BFCHG | BFBAK);
upmodes(bp);
undo_add_boundary(FFRAND, 1);
undo_add_modified();
}
return (s);
}
/*
* Re-initialize the terminal when the editor is resumed.
* The keypad_xmit doesn't really belong here but...
*/
void
ttreinit(void)
{
/* check if file was modified while we were gone */
if (fchecktime(curbp) != TRUE) {
curbp->b_flag |= BFDIRTY;
}
if (enter_ca_mode)
/* enter application mode */
putpad(enter_ca_mode, 1);
if (keypad_xmit)
/* turn on keypad */
putpad(keypad_xmit, 1);
ttresize();
}
