mc/edit/editkeys.c

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/* Editor key translation.
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
2005, 2006, 2007 Free Software Foundation, Inc.
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Authors: 1996, 1997 Paul Sheer
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.
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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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
/** \file
* \brief Source: editor key translation
*/
#include <config.h>
#include <assert.h>
#include <stdio.h>
#include <stdarg.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <sys/stat.h>
#include <stdlib.h>
#include "../src/global.h"
#include "edit-impl.h"
#include "edit-widget.h" /* edit->macro_i */
#include "editcmd_dialogs.h"
#include "../src/tty/tty.h" /* keys */
#include "../src/tty/key.h" /* KEY_M_SHIFT */
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#include "../src/cmddef.h" /* list of commands */
#include "../src/keybind.h" /* lookup_keymap_command() */
#include "../src/charsets.h" /* convert_from_input_c() */
#include "../src/main.h" /* display_codepage */
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#include "../src/strutil.h" /* str_isutf8 () */
/*
* Translate the keycode into either 'command' or 'char_for_insertion'.
* 'command' is one of the editor commands from cmddef.h.
*/
int
edit_translate_key (WEdit *edit, long x_key, int *cmd, int *ch)
{
unsigned long command = (unsigned long) CK_Insert_Char;
int char_for_insertion = -1;
int c;
/* an ordinary insertable character */
if (x_key < 256) {
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#ifdef HAVE_CHARSET
if ( edit->charpoint >= 4 ) {
edit->charpoint = 0;
edit->charbuf[edit->charpoint] = '\0';
}
if ( edit->charpoint < 4 ) {
edit->charbuf[edit->charpoint++] = x_key;
edit->charbuf[edit->charpoint] = '\0';
}
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/* input from 8-bit locale */
if ( !utf8_display ) {
/* source in 8-bit codeset */
if (!edit->utf8) {
#endif /* HAVE_CHARSET */
c = convert_from_input_c (x_key);
if (is_printable (c)) {
char_for_insertion = c;
goto fin;
}
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#ifdef HAVE_CHARSET
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} else {
c = convert_from_input_c (x_key);
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if (is_printable (c)) {
char_for_insertion = convert_from_8bit_to_utf_c2((unsigned char) x_key);
goto fin;
}
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}
/* UTF-8 locale */
} else {
/* source in UTF-8 codeset */
if ( edit->utf8 ) {
int res = str_is_valid_char (edit->charbuf, edit->charpoint);
if (res < 0) {
if (res != -2) {
edit->charpoint = 0; /* broken multibyte char, skip */
goto fin;
}
char_for_insertion = x_key;
goto fin;
} else {
edit->charbuf[edit->charpoint]='\0';
edit->charpoint = 0;
if ( g_unichar_isprint (g_utf8_get_char(edit->charbuf))) {
char_for_insertion = x_key;
goto fin;
}
}
/* 8-bit source */
} else {
int res = str_is_valid_char (edit->charbuf, edit->charpoint);
if (res < 0) {
if (res != -2) {
edit->charpoint = 0; /* broken multibyte char, skip */
goto fin;
}
/* not finised multibyte input (in meddle multibyte utf-8 char) */
goto fin;
} else {
if ( g_unichar_isprint (g_utf8_get_char(edit->charbuf)) ) {
c = convert_from_utf_to_current ( edit->charbuf );
edit->charbuf[0] = '\0';
edit->charpoint = 0;
char_for_insertion = c;
goto fin;
}
/* unprinteble utf input, skip it */
edit->charbuf[0] = '\0';
edit->charpoint = 0;
}
}
}
#endif /* HAVE_CHARSET */
}
/* Commands specific to the key emulation */
if (edit->extmod) {
edit->extmod = 0;
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command = lookup_keymap_command (editor_x_map, x_key);
} else
command = lookup_keymap_command (editor_map, x_key);
if (command == CK_Ignore_Key)
command = CK_Insert_Char;
fin:
*cmd = (int) command; /* FIXME */
*ch = char_for_insertion;
return (command == (unsigned long) CK_Insert_Char && char_for_insertion == -1) ? 0 : 1;
}