Keith Winstein
75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
/*
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Mosh: the mobile shell
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Copyright 2012 Keith Winstein
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <assert.h>
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#include "terminaluserinput.h"
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using namespace Terminal;
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using namespace std;
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string UserInput::input( const Parser::UserByte *act,
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bool application_mode_cursor_keys )
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{
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act->handled = true;
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/* The user will always be in application mode. If stm is not in
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application mode, convert user's cursor control function to an
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ANSI cursor control sequence */
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/* We need to look ahead one byte in the SS3 state to see if
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the next byte will be A, B, C, or D (cursor control keys). */
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switch ( state ) {
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case Ground:
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if ( act->c == 0x1b ) { /* ESC */
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state = ESC;
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}
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return string( &act->c, 1 );
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break;
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case ESC:
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if ( act->c == 'O' ) { /* ESC O = 7-bit SS3 */
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state = SS3;
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return string();
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} else {
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state = Ground;
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return string( &act->c, 1 );
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}
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break;
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case SS3:
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state = Ground;
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if ( (!application_mode_cursor_keys)
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&& (act->c >= 'A')
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&& (act->c <= 'D') ) {
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char translated_cursor[ 2 ] = { '[', act->c };
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return string( translated_cursor, 2 );
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} else {
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char original_cursor[ 2 ] = { 'O', act->c };
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return string( original_cursor, 2 );
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}
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break;
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}
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/* This doesn't handle the 8-bit SS3 C1 control, which would be
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two octets in UTF-8. Fortunately nobody seems to send this. */
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assert( false );
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return string();
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}
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