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/*
* deltochar.c - ZLE module implementing Emacs' zap-to-char
*
* This file is part of zsh, the Z shell.
*
* Copyright (c) 1996-1997 Peter Stephenson
* All rights reserved.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and to distribute modified versions of this software for any
* purpose, provided that the above copyright notice and the following
* two paragraphs appear in all copies of this software.
*
* In no event shall Peter Stephenson or the Zsh Development Group be liable
* to any party for direct, indirect, special, incidental, or consequential
* damages arising out of the use of this software and its documentation,
* even if Peter Stephenson and the Zsh Development Group have been advised of
* the possibility of such damage.
*
* Peter Stephenson and the Zsh Development Group specifically disclaim any
* warranties, including, but not limited to, the implied warranties of
* merchantability and fitness for a particular purpose. The software
* provided hereunder is on an "as is" basis, and Peter Stephenson and the
* Zsh Development Group have no obligation to provide maintenance,
* support, updates, enhancements, or modifications.
*
*/
#include "deltochar.mdh"
#include "deltochar.pro"
static Widget w_deletetochar;
static Widget w_zaptochar;
/**/
static int
deltochar(UNUSED(char **args))
{
ZLE_INT_T c = getfullchar(0);
int dest = zlecs, ok = 0, n = zmult;
int zap = (bindk->widget == w_zaptochar);
if (n > 0) {
while (n-- && dest != zlell) {
while (dest != zlell && (ZLE_INT_T)zleline[dest] != c)
dest++;
if (dest != zlell) {
if (!zap || n > 0)
dest++;
if (!n) {
forekill(dest - zlecs, 0);
ok++;
}
}
}
} else {
/* ignore character cursor is on when scanning backwards */
if (dest)
dest--;
while (n++ && dest != 0) {
while (dest != 0 && (ZLE_INT_T)zleline[dest] != c)
dest--;
if ((ZLE_INT_T)zleline[dest] == c) {
if (!n) {
backkill(zlecs - dest - zap, 1);
ok++;
}
if (dest)
dest--;
}
}
}
return !ok;
}
/**/
int
setup_(UNUSED(Module m))
{
return 0;
}
/**/
int
boot_(Module m)
{
w_deletetochar = addzlefunction("delete-to-char", deltochar,
ZLE_KILL | ZLE_KEEPSUFFIX);
if (w_deletetochar) {
w_zaptochar = addzlefunction("zap-to-char", deltochar,
ZLE_KILL | ZLE_KEEPSUFFIX);
if (w_zaptochar)
return 0;
deletezlefunction(w_deletetochar);
}
zwarnnam(m->nam, "deltochar: name clash when adding ZLE functions");
return -1;
}
/**/
int
cleanup_(UNUSED(Module m))
{
deletezlefunction(w_deletetochar);
deletezlefunction(w_zaptochar);
return 0;
}
/**/
int
finish_(UNUSED(Module m))
{
return 0;
}
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