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/*
* Copyright 2008-2013 Various Authors
* Copyright 2005 Timo Hirvonen
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "cmdline.h"
#include "uchar.h"
#include "xmalloc.h"
struct cmdline cmdline;
const char cmdline_word_delimiters[] = " ";
const char cmdline_filename_delimiters[] = "/";
void cmdline_init(void)
{
cmdline.blen = 0;
cmdline.clen = 0;
cmdline.bpos = 0;
cmdline.cpos = 0;
cmdline.size = 128;
cmdline.line = xnew(char, cmdline.size);
cmdline.line[0] = 0;
}
void cmdline_insert_ch(uchar ch)
{
int size;
size = u_char_size(ch);
if (cmdline.blen + size > cmdline.size) {
cmdline.size *= 2;
cmdline.line = xrenew(char, cmdline.line, cmdline.size);
}
memmove(cmdline.line + cmdline.bpos + size,
cmdline.line + cmdline.bpos,
cmdline.blen - cmdline.bpos + 1);
u_set_char_raw(cmdline.line, &cmdline.bpos, ch);
cmdline.cpos++;
cmdline.blen += size;
cmdline.clen++;
}
void cmdline_backspace(void)
{
int bpos, size;
if (cmdline.bpos == 0)
return;
bpos = cmdline.bpos;
u_prev_char_pos(cmdline.line, &bpos);
size = cmdline.bpos - bpos;
memmove(cmdline.line + bpos,
cmdline.line + cmdline.bpos,
cmdline.blen - cmdline.bpos + 1);
cmdline.bpos -= size;
cmdline.cpos--;
cmdline.blen -= size;
cmdline.clen--;
}
void cmdline_backspace_to_bol(void)
{
while (cmdline.bpos)
cmdline_backspace();
}
void cmdline_delete_ch(void)
{
uchar ch;
int size, bpos;
if (cmdline.bpos == cmdline.blen)
return;
bpos = cmdline.bpos;
ch = u_get_char(cmdline.line, &bpos);
size = u_char_size(ch);
cmdline.blen -= size;
cmdline.clen--;
memmove(cmdline.line + cmdline.bpos,
cmdline.line + cmdline.bpos + size,
cmdline.blen - cmdline.bpos + 1);
}
void cmdline_set_text(const char *text)
{
int len = strlen(text);
if (len >= cmdline.size) {
while (len >= cmdline.size)
cmdline.size *= 2;
cmdline.line = xrenew(char, cmdline.line, cmdline.size);
}
memcpy(cmdline.line, text, len + 1);
cmdline.cpos = u_strlen_safe(cmdline.line);
cmdline.bpos = len;
cmdline.clen = cmdline.cpos;
cmdline.blen = len;
}
void cmdline_clear(void)
{
cmdline.blen = 0;
cmdline.clen = 0;
cmdline.bpos = 0;
cmdline.cpos = 0;
cmdline.line[0] = 0;
}
void cmdline_clear_end(void)
{
cmdline.line[cmdline.bpos] = 0;
cmdline.clen = u_strlen_safe(cmdline.line);
cmdline.blen = strlen(cmdline.line);
}
void cmdline_move_left(void)
{
if (cmdline.bpos > 0) {
cmdline.cpos--;
u_prev_char_pos(cmdline.line, &cmdline.bpos);
}
}
void cmdline_move_right(void)
{
if (cmdline.bpos < cmdline.blen) {
u_get_char(cmdline.line, &cmdline.bpos);
cmdline.cpos++;
}
}
void cmdline_move_home(void)
{
cmdline.cpos = 0;
cmdline.bpos = 0;
}
void cmdline_move_end(void)
{
cmdline.cpos = cmdline.clen;
cmdline.bpos = cmdline.blen;
}
static int next_word(const char *str, int bpos, int *cdiff, const char *delim, int direction)
{
int skip_delim = 1;
while ((direction > 0) ? str[bpos] : (bpos > 0)) {
uchar ch;
int oldp = bpos;
if (direction > 0) {
ch = u_get_char(str, &bpos);
} else {
u_prev_char_pos(str, &bpos);
oldp = bpos;
ch = u_get_char(str, &oldp);
}
if (u_strchr(delim, ch)) {
if (!skip_delim) {
bpos -= bpos - oldp;
break;
}
} else
skip_delim = 0;
*cdiff += direction;
}
return bpos;
}
void cmdline_forward_word(const char *delim)
{
cmdline.bpos = next_word(cmdline.line, cmdline.bpos, &cmdline.cpos, delim, +1);
}
void cmdline_backward_word(const char *delim)
{
cmdline.bpos = next_word(cmdline.line, cmdline.bpos, &cmdline.cpos, delim, -1);
}
void cmdline_delete_word(const char *delim)
{
int bpos, cdiff = 0;
bpos = next_word(cmdline.line, cmdline.bpos, &cdiff, delim, +1);
memmove(cmdline.line + cmdline.bpos,
cmdline.line + bpos,
cmdline.blen - bpos + 1);
cmdline.blen -= bpos - cmdline.bpos;
cmdline.clen -= cdiff;
}
void cmdline_backward_delete_word(const char *delim)
{
int bpos, cdiff = 0;
bpos = next_word(cmdline.line, cmdline.bpos, &cdiff, delim, -1);
cmdline.blen += bpos - cmdline.bpos;
memmove(cmdline.line + bpos,
cmdline.line + cmdline.bpos,
cmdline.blen - bpos + 1);
cmdline.bpos = bpos;
cmdline.clen += cdiff;
cmdline.cpos += cdiff;
}
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