int
viundochange(char **args)
{
handleundo();
if(curchange->next) {
do {
applychange(curchange);
curchange = curchange->next;
} while(curchange->next);
setlastline();
return 0;
} else
return undo(args);
}
int
redo(UNUSED(char **args))
{
handleundo();
do {
if(!curchange->next)
return 1;
if (applychange(curchange))
curchange = curchange->next;
else
break;
} while(curchange->prev->flags & CH_NEXT);
setlastline();
return 0;
}
int
undo(UNUSED(char **args))
{
handleundo();
do {
if(!curchange->prev)
return 1;
if (unapplychange(curchange->prev))
curchange = curchange->prev;
else
break;
} while(curchange->flags & CH_PREV);
setlastline();
return 0;
}
mod_export void
handleundo(void)
{
int remetafy;
/*
* Yuk: we call this from within the completion system,
* so we need to convert back to the form which can be
* copied into undo entries.
*/
if (zlemetaline != NULL) {
unmetafy_line();
remetafy = 1;
} else
remetafy = 0;
mkundoent();
if(nextchanges) {
setlastline();
if(curchange->next) {
freechanges(curchange->next);
curchange->next = NULL;
free(curchange->del);
free(curchange->ins);
curchange->del = curchange->ins = NULL;
curchange->dell = curchange->insl = 0;
}
nextchanges->prev = curchange->prev;
if(curchange->prev)
curchange->prev->next = nextchanges;
else
changes = nextchanges;
curchange->prev = endnextchanges;
endnextchanges->next = curchange;
nextchanges = endnextchanges = NULL;
}
if (remetafy)
metafy_line();
}
int
undo(char **args)
{
zlong last_change = (zlong)0;
if (*args)
{
last_change = zstrtol(*args, NULL, 0);
}
handleundo();
do {
if(!curchange->prev)
return 1;
if (unapplychange(curchange->prev))
curchange = curchange->prev;
else
break;
} while (*args ? curchange->changeno != last_change :
(curchange->flags & CH_PREV));
setlastline();
return 0;
}