mirror of
https://github.com/DrBeef/ioq3quest.git
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476 lines
9.7 KiB
C
476 lines
9.7 KiB
C
/*
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===========================================================================
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Copyright (C) 1999-2005 Id Software, Inc.
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, 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 Quake III Arena source code; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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*/
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#include "../qcommon/q_shared.h"
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#include "../qcommon/qcommon.h"
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#include "sys_local.h"
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#include <unistd.h>
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#include <signal.h>
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#include <termios.h>
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#include <fcntl.h>
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#include <sys/time.h>
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/*
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=============================================================
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tty console routines
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NOTE: if the user is editing a line when something gets printed to the early
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console then it won't look good so we provide CON_Hide and CON_Show to be
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called before and after a stdout or stderr output
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=============================================================
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*/
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extern qboolean stdinIsATTY;
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static qboolean stdin_active;
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// general flag to tell about tty console mode
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static qboolean ttycon_on = qfalse;
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static int ttycon_hide = 0;
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// some key codes that the terminal may be using, initialised on start up
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static int TTY_erase;
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static int TTY_eof;
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static struct termios TTY_tc;
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static field_t TTY_con;
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// This is somewhat of aduplicate of the graphical console history
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// but it's safer more modular to have our own here
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#define CON_HISTORY 32
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static field_t ttyEditLines[ CON_HISTORY ];
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static int hist_current = -1, hist_count = 0;
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/*
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==================
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CON_FlushIn
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Flush stdin, I suspect some terminals are sending a LOT of shit
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FIXME relevant?
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==================
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*/
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static void CON_FlushIn( void )
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{
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char key;
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while (read(STDIN_FILENO, &key, 1)!=-1);
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}
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/*
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==================
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CON_Back
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Output a backspace
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NOTE: it seems on some terminals just sending '\b' is not enough so instead we
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send "\b \b"
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(FIXME there may be a way to find out if '\b' alone would work though)
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==================
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*/
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static void CON_Back( void )
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{
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char key;
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size_t size;
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key = '\b';
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size = write(STDOUT_FILENO, &key, 1);
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key = ' ';
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size = write(STDOUT_FILENO, &key, 1);
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key = '\b';
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size = write(STDOUT_FILENO, &key, 1);
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}
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/*
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==================
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CON_Hide
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Clear the display of the line currently edited
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bring cursor back to beginning of line
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==================
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*/
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static void CON_Hide( void )
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{
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if( ttycon_on )
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{
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int i;
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if (ttycon_hide)
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{
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ttycon_hide++;
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return;
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}
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if (TTY_con.cursor>0)
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{
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for (i=0; i<TTY_con.cursor; i++)
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{
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CON_Back();
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}
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}
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CON_Back(); // Delete "]"
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ttycon_hide++;
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}
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}
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/*
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==================
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CON_Show
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Show the current line
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FIXME need to position the cursor if needed?
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==================
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*/
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static void CON_Show( void )
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{
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if( ttycon_on )
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{
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int i;
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assert(ttycon_hide>0);
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ttycon_hide--;
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if (ttycon_hide == 0)
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{
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size_t size;
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size = write(STDOUT_FILENO, "]", 1);
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if (TTY_con.cursor)
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{
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for (i=0; i<TTY_con.cursor; i++)
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{
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size = write(STDOUT_FILENO, TTY_con.buffer+i, 1);
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}
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}
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}
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}
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}
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/*
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==================
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CON_Shutdown
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Never exit without calling this, or your terminal will be left in a pretty bad state
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==================
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*/
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void CON_Shutdown( void )
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{
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if (ttycon_on)
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{
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CON_Back(); // Delete "]"
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tcsetattr (STDIN_FILENO, TCSADRAIN, &TTY_tc);
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}
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// Restore blocking to stdin reads
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fcntl(STDIN_FILENO, F_SETFL, fcntl(STDIN_FILENO, F_GETFL, 0) & ~O_NONBLOCK);
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}
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/*
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==================
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Hist_Add
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==================
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*/
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void Hist_Add(field_t *field)
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{
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int i;
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assert(hist_count <= CON_HISTORY);
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assert(hist_count >= 0);
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assert(hist_current >= -1);
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assert(hist_current <= hist_count);
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// make some room
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for (i=CON_HISTORY-1; i>0; i--)
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{
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ttyEditLines[i] = ttyEditLines[i-1];
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}
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ttyEditLines[0] = *field;
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if (hist_count<CON_HISTORY)
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{
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hist_count++;
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}
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hist_current = -1; // re-init
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}
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/*
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==================
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Hist_Prev
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==================
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*/
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field_t *Hist_Prev( void )
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{
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int hist_prev;
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assert(hist_count <= CON_HISTORY);
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assert(hist_count >= 0);
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assert(hist_current >= -1);
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assert(hist_current <= hist_count);
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hist_prev = hist_current + 1;
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if (hist_prev >= hist_count)
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{
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return NULL;
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}
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hist_current++;
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return &(ttyEditLines[hist_current]);
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}
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/*
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==================
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Hist_Next
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==================
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*/
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field_t *Hist_Next( void )
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{
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assert(hist_count <= CON_HISTORY);
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assert(hist_count >= 0);
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assert(hist_current >= -1);
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assert(hist_current <= hist_count);
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if (hist_current >= 0)
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{
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hist_current--;
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}
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if (hist_current == -1)
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{
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return NULL;
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}
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return &(ttyEditLines[hist_current]);
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}
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/*
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==================
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CON_SigCont
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Reinitialize console input after receiving SIGCONT, as on Linux the terminal seems to lose all
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set attributes if user did CTRL+Z and then does fg again.
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==================
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*/
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void CON_SigCont(int signum)
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{
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CON_Init();
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}
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/*
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==================
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CON_Init
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Initialize the console input (tty mode if possible)
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==================
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*/
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void CON_Init( void )
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{
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struct termios tc;
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// If the process is backgrounded (running non interactively)
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// then SIGTTIN or SIGTOU is emitted, if not caught, turns into a SIGSTP
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signal(SIGTTIN, SIG_IGN);
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signal(SIGTTOU, SIG_IGN);
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// If SIGCONT is received, reinitialize console
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signal(SIGCONT, CON_SigCont);
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// Make stdin reads non-blocking
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fcntl(STDIN_FILENO, F_SETFL, fcntl(STDIN_FILENO, F_GETFL, 0) | O_NONBLOCK );
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if (!stdinIsATTY)
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{
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Com_Printf("tty console mode disabled\n");
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ttycon_on = qfalse;
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stdin_active = qtrue;
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return;
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}
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Field_Clear(&TTY_con);
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tcgetattr (STDIN_FILENO, &TTY_tc);
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TTY_erase = TTY_tc.c_cc[VERASE];
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TTY_eof = TTY_tc.c_cc[VEOF];
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tc = TTY_tc;
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/*
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ECHO: don't echo input characters
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ICANON: enable canonical mode. This enables the special
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characters EOF, EOL, EOL2, ERASE, KILL, REPRINT,
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STATUS, and WERASE, and buffers by lines.
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ISIG: when any of the characters INTR, QUIT, SUSP, or
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DSUSP are received, generate the corresponding sig<69>
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nal
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*/
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tc.c_lflag &= ~(ECHO | ICANON);
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/*
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ISTRIP strip off bit 8
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INPCK enable input parity checking
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*/
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tc.c_iflag &= ~(ISTRIP | INPCK);
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tc.c_cc[VMIN] = 1;
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tc.c_cc[VTIME] = 0;
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tcsetattr (STDIN_FILENO, TCSADRAIN, &tc);
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ttycon_on = qtrue;
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}
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/*
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==================
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CON_Input
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==================
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*/
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char *CON_Input( void )
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{
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// we use this when sending back commands
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static char text[MAX_EDIT_LINE];
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int avail;
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char key;
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field_t *history;
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size_t size;
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if(ttycon_on)
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{
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avail = read(STDIN_FILENO, &key, 1);
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if (avail != -1)
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{
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// we have something
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// backspace?
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// NOTE TTimo testing a lot of values .. seems it's the only way to get it to work everywhere
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if ((key == TTY_erase) || (key == 127) || (key == 8))
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{
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if (TTY_con.cursor > 0)
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{
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TTY_con.cursor--;
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TTY_con.buffer[TTY_con.cursor] = '\0';
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CON_Back();
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}
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return NULL;
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}
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// check if this is a control char
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if ((key) && (key) < ' ')
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{
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if (key == '\n')
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{
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// push it in history
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Hist_Add(&TTY_con);
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Q_strncpyz(text, TTY_con.buffer, sizeof(text));
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Field_Clear(&TTY_con);
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key = '\n';
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size = write(1, &key, 1);
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size = write( 1, "]", 1 );
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return text;
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}
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if (key == '\t')
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{
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CON_Hide();
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Field_AutoComplete( &TTY_con );
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CON_Show();
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return NULL;
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}
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avail = read(STDIN_FILENO, &key, 1);
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if (avail != -1)
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{
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// VT 100 keys
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if (key == '[' || key == 'O')
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{
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avail = read(STDIN_FILENO, &key, 1);
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if (avail != -1)
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{
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switch (key)
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{
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case 'A':
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history = Hist_Prev();
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if (history)
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{
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CON_Hide();
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TTY_con = *history;
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CON_Show();
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}
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CON_FlushIn();
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return NULL;
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break;
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case 'B':
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history = Hist_Next();
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CON_Hide();
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if (history)
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{
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TTY_con = *history;
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} else
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{
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Field_Clear(&TTY_con);
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}
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CON_Show();
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CON_FlushIn();
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return NULL;
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break;
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case 'C':
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return NULL;
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case 'D':
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return NULL;
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}
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}
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}
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}
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Com_DPrintf("droping ISCTL sequence: %d, TTY_erase: %d\n", key, TTY_erase);
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CON_FlushIn();
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return NULL;
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}
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if (TTY_con.cursor >= sizeof(text) - 1)
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return NULL;
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// push regular character
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TTY_con.buffer[TTY_con.cursor] = key;
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TTY_con.cursor++;
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// print the current line (this is differential)
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size = write(STDOUT_FILENO, &key, 1);
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}
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return NULL;
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}
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else if (stdin_active)
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{
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int len;
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fd_set fdset;
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struct timeval timeout;
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FD_ZERO(&fdset);
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FD_SET(STDIN_FILENO, &fdset); // stdin
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timeout.tv_sec = 0;
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timeout.tv_usec = 0;
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if(select (STDIN_FILENO + 1, &fdset, NULL, NULL, &timeout) == -1 || !FD_ISSET(STDIN_FILENO, &fdset))
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return NULL;
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len = read(STDIN_FILENO, text, sizeof(text));
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if (len == 0)
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{ // eof!
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stdin_active = qfalse;
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return NULL;
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}
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if (len < 1)
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return NULL;
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text[len-1] = 0; // rip off the /n and terminate
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return text;
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}
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return NULL;
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}
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/*
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==================
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CON_Print
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==================
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*/
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void CON_Print( const char *msg )
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{
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CON_Hide( );
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if( com_ansiColor && com_ansiColor->integer )
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Sys_AnsiColorPrint( msg );
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else
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fputs( msg, stderr );
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CON_Show( );
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}
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