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vi: fix backspace over tab in commands

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Colon and search commands are entered on the status line.  Since
the cursor position wasn't being tracked backspacing over a tab
resulted in a mismatch between the actual and apparent content
of the command.

function                                             old     new   delta
get_input_line                                       178     180      +2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 2/0)                 Total: 2 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
This commit is contained in:
Ron Yorston 2022-04-20 09:23:30 +01:00 committed by Bernhard Reutner-Fischer
parent 57fea029cc
commit c93eb1a95b
1 changed files with 2 additions and 1 deletions
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3
editors/vi.c
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@ -1217,10 +1217,11 @@ static char *get_input_line(const char *prompt)
break; // this is end of input break; // this is end of input
if (isbackspace(c)) { if (isbackspace(c)) {
// user wants to erase prev char // user wants to erase prev char
write1("\b \b"); // erase char on screen
buf[--i] = '\0'; buf[--i] = '\0';
go_bottom_and_clear_to_eol();
if (i <= 0) // user backs up before b-o-l, exit if (i <= 0) // user backs up before b-o-l, exit
break; break;
write1(buf);
} else if (c > 0 && c < 256) { // exclude Unicode } else if (c > 0 && c < 256) { // exclude Unicode
// (TODO: need to handle Unicode) // (TODO: need to handle Unicode)
buf[i] = c; buf[i] = c;