diff options
Diffstat (limited to 'Src/Zle/zle_utils.c')
| -rw-r--r-- | Src/Zle/zle_utils.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/Src/Zle/zle_utils.c b/Src/Zle/zle_utils.c index 06e458190..198c0baa3 100644 --- a/Src/Zle/zle_utils.c +++ b/Src/Zle/zle_utils.c @@ -1405,6 +1405,10 @@ static struct change *nextchanges, *endnextchanges; /**/ zlong undo_changeno; +/* If positive, don't undo beyond this point */ + +zlong undo_limitno; + /* If non-zero, the last increment to undo_changeno was for the variable */ static int undo_set_by_variable; @@ -1418,7 +1422,7 @@ initundo(void) curchange->prev = curchange->next = NULL; curchange->del = curchange->ins = NULL; curchange->dell = curchange->insl = 0; - curchange->changeno = undo_changeno = 0; + curchange->changeno = undo_changeno = undo_limitno = 0; undo_set_by_variable = 0; lastline = zalloc((lastlinesz = linesz) * ZLE_CHAR_SIZE); ZS_memcpy(lastline, zleline, (lastll = zlell)); @@ -1582,6 +1586,8 @@ undo(char **args) return 1; if (prev->changeno < last_change) break; + if (prev->changeno < undo_limitno && !*args) + break; if (unapplychange(prev)) curchange = prev; else @@ -1744,7 +1750,21 @@ get_undo_current_change(UNUSED(Param pm)) * Increment the number in case a change is in progress; * we don't want to back off what's already been done when * we return to this change number. This eliminates any - * problem about the point where a change is numbered. + * problem about the point where a change is numbered */ return ++undo_changeno; } + +/**/ +zlong +get_undo_limit_change(UNUSED(Param pm)) +{ + return undo_limitno; +} + +/**/ +void +set_undo_limit_change(UNUSED(Param pm), zlong value) +{ + undo_limitno = value; +} |