mirror of https://bitbucket.org/CPMADevs/cnq3
590 lines
15 KiB
C++
590 lines
15 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 <termios.h>
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#include <unistd.h>
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#include <signal.h>
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#include <errno.h>
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#include <fcntl.h>
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#include "linux_local.h"
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static qbool stdin_active = qtrue;
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// enable/disable tty input mode
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// NOTE TTimo this is used during startup, cannot be changed during run
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static cvar_t *ttycon = NULL;
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// general flag to tell about tty console mode
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static qbool ttycon_on = qfalse;
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// when printing general stuff to stdout stderr (Sys_Printf)
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// we need to disable the tty console stuff
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// this increments so we can recursively disable
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static int ttycon_hide = 0;
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// some key codes that the terminal may be using
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// TTimo NOTE: I'm not sure how relevant this is
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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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static cvar_t *ttycon_ansicolor = NULL;
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static history_t tty_history;
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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 console then it won't look good
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// so we provide tty_Clear and tty_Show to be called before and after a stdout or stderr output
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// =============================================================
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// flush stdin, I suspect some terminals are sending a LOT of shit
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// FIXME TTimo relevant?
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static void tty_FlushIn()
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{
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char key;
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while (read(0, &key, 1)!=-1);
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}
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// do a backspace
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// TTimo NOTE: it seems on some terminals just sending '\b' is not enough
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// so for now, in any case we send "\b \b" .. yeah well ..
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// (there may be a way to find out if '\b' alone would work though)
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static void tty_Back()
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{
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char key;
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key = '\b';
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write(STDOUT_FILENO, &key, 1);
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key = ' ';
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write(STDOUT_FILENO, &key, 1);
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key = '\b';
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write(STDOUT_FILENO, &key, 1);
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}
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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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void tty_Hide()
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{
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assert(ttycon_on);
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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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const int length = strlen(tty_con.buffer);
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if (length > 0)
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{
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const int stepsForward = length - tty_con.cursor;
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// a single write call for this didn't work on my terminal
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for (int i = 0; i < stepsForward; ++i)
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{
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write(STDOUT_FILENO, "\033[1C", 4);
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}
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for (int i = 0; i < length; ++i)
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{
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tty_Back();
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}
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}
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tty_Back(); // delete the leading "]"
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ttycon_hide++;
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}
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// show the current line
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// FIXME TTimo need to position the cursor if needed??
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static void tty_Show()
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{
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assert(ttycon_on);
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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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write(STDOUT_FILENO, "]", 1);
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const int length = strlen(tty_con.buffer);
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if (length > 0)
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{
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const int stepsBack = length - tty_con.cursor;
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write(STDOUT_FILENO, tty_con.buffer, length);
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// a single write call for this didn't work on my terminal
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for (int i = 0; i < stepsBack; ++i)
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{
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write(STDOUT_FILENO, "\033[1D", 4);
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}
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}
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}
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}
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// initialize the console input (tty mode if wanted and possible)
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void Lin_ConsoleInputInit()
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{
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struct termios tc;
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// TTimo
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// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=390
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// ttycon 0 or 1, if the process is backgrounded (running non interactively)
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// then SIGTTIN or SIGTOU is emitted, if not catched, turns into a SIGSTP
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signal(SIGTTIN, SIG_IGN);
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signal(SIGTTOU, SIG_IGN);
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// FIXME TTimo initialize this in Sys_Init or something?
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ttycon = Cvar_Get("ttycon", "1", 0);
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if (ttycon && ttycon->value)
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{
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if (isatty(STDIN_FILENO)!=1)
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{
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Com_Printf("stdin is not a tty, tty console mode failed: %s\n", strerror(errno));
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Cvar_Set("ttycon", "0");
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ttycon_on = qfalse;
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return;
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}
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Com_Printf("Started tty console (use +set ttycon 0 to disable)\n");
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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 signal
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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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ttycon_ansicolor = Cvar_Get( "ttycon_ansicolor", "0", CVAR_ARCHIVE );
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} else
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ttycon_on = qfalse;
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// make stdin non-blocking
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fcntl( STDIN_FILENO, F_SETFL, fcntl(STDIN_FILENO, F_GETFL, 0) | FNDELAY );
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}
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const char* Lin_ConsoleInput()
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{
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// we use this when sending back commands
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static char text[256];
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int avail;
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char key;
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field_t field;
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if (ttycon && ttycon->value)
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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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if (key != '\t')
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tty_con.acOffset = 0;
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if (key == tty_erase || key == 127 || key == 8) // backspace
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{
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const int length = strlen(tty_con.buffer);
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if (length > 0)
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{
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if (tty_con.cursor == length)
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{
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tty_con.buffer[length - 1] = '\0';
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tty_con.cursor--;
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tty_Back();
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}
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else if (tty_con.cursor > 0)
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{
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tty_Hide();
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const int toMove = length + 1 - tty_con.cursor; // with the null terminator
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memmove(tty_con.buffer + tty_con.cursor - 1, tty_con.buffer + tty_con.cursor, toMove);
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tty_con.cursor--;
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tty_Show();
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}
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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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#ifdef DEDICATED
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History_SaveCommand(&tty_history, &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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write(STDOUT_FILENO, "\n]", 2);
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#else
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// not in a game yet and no leading slash?
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if (cls.state != CA_ACTIVE &&
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tty_con.buffer[0] != '/' && tty_con.buffer[0] != '\\')
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{
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// there's no one to chat with, so we consider this a command
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const int length = strlen(tty_con.buffer);
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if (length > 0)
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{
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memmove(tty_con.buffer + 1, tty_con.buffer, length + 1);
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}
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else
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{
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tty_con.buffer[1] = '\0';
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}
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tty_con.buffer[0] = '\\';
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tty_con.cursor++;
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}
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// decide what the final command will be
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const int length = strlen(tty_con.buffer);
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if (tty_con.buffer[0] == '/' || tty_con.buffer[0] == '\\')
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Q_strncpyz(text, tty_con.buffer + 1, sizeof(text));
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else if (length > 0)
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Com_sprintf(text, sizeof(text), "say %s", tty_con.buffer);
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else
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*text = '\0';
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History_SaveCommand(&tty_history, &tty_con);
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tty_Hide();
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Com_Printf("tty]%s\n", tty_con.buffer);
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Field_Clear(&tty_con);
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tty_Show();
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#endif
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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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tty_Hide();
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#ifdef DEDICATED
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Field_AutoComplete( &tty_con, qfalse );
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#else
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Field_AutoComplete( &tty_con, qtrue );
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#endif
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tty_Show();
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return NULL;
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}
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avail = read(0, &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(0, &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': // up arrow (move cursor up)
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History_GetPreviousCommand(&field, &tty_history);
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if (field.buffer[0] != '\0')
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{
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tty_Hide();
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tty_con = field;
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tty_Show();
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}
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tty_FlushIn();
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return NULL;
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break;
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case 'B': // down arrow (move cursor down)
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History_GetNextCommand(&field, &tty_history, 0);
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tty_Hide();
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if (tty_con.buffer[0] != '\0')
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{
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tty_con = field;
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}
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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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tty_Show();
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tty_FlushIn();
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return NULL;
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break;
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case 'C': // right arrow (move cursor right)
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if (tty_con.cursor < strlen(tty_con.buffer))
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{
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write(STDOUT_FILENO, "\033[1C", 4);
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tty_con.cursor++;
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}
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return NULL;
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case 'D': // left arrow (move cursor left)
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if (tty_con.cursor > 0)
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{
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write(STDOUT_FILENO, "\033[1D", 4);
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tty_con.cursor--;
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}
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return NULL;
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case '3': // delete (might not work on all terminals)
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{
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const int length = strlen(tty_con.buffer);
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if (tty_con.cursor < length)
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{
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tty_Hide();
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const int toMove = length - tty_con.cursor; // with terminating NULL
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memmove(tty_con.buffer + tty_con.cursor, tty_con.buffer + tty_con.cursor + 1, toMove);
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tty_Show();
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}
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}
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tty_FlushIn();
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return NULL;
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case 'H': // home (move cursor to upper left corner)
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if (tty_con.cursor > 0)
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{
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tty_Hide();
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tty_con.cursor = 0;
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tty_Show();
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}
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return NULL;
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case 'F': // end (might not work on all terminals)
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{
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const int length = strlen(tty_con.buffer);
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if (tty_con.cursor < length)
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{
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tty_Hide();
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tty_con.cursor = length;
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tty_Show();
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}
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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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}
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Com_DPrintf("droping ISCTL sequence: %d, tty_erase: %d\n", key, tty_erase);
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tty_FlushIn();
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return NULL;
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}
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// if we get here, key is a regular character
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const int length = strlen(tty_con.buffer);
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if (tty_con.cursor == length)
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{
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write(STDOUT_FILENO, &key, 1);
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tty_con.buffer[tty_con.cursor + 0] = key;
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tty_con.buffer[tty_con.cursor + 1] = '\0';
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tty_con.cursor++;
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}
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else
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{
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tty_Hide();
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const int toMove = length + 1 - tty_con.cursor; // need to move the null terminator too
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memmove(tty_con.buffer + tty_con.cursor + 1, tty_con.buffer + tty_con.cursor, toMove);
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tty_con.buffer[tty_con.cursor] = key;
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tty_con.cursor++;
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tty_Show();
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}
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}
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return NULL;
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} else
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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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if (!com_dedicated || !com_dedicated->value)
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return NULL;
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if (!stdin_active)
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return NULL;
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FD_ZERO(&fdset);
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FD_SET(STDIN_FILENO, &fdset);
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timeout.tv_sec = 0;
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timeout.tv_usec = 0;
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if (select (1, &fdset, NULL, NULL, &timeout) == -1 || !FD_ISSET(STDIN_FILENO, &fdset))
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{
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return NULL;
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}
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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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}
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// never exit without calling this, or your terminal will be left in a pretty bad state
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void Lin_ConsoleInputShutdown()
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{
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if (ttycon_on)
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{
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tty_Back(); // delete the leading "]"
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tcsetattr (STDIN_FILENO, TCSADRAIN, &tty_tc);
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ttycon_on = qfalse;
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}
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// make stdin blocking
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fcntl( STDIN_FILENO, F_SETFL, fcntl(STDIN_FILENO, F_GETFL, 0) & (~FNDELAY) );
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}
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static struct Q3ToAnsiColorTable_s
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{
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char Q3color;
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const char* ANSIcolor;
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} const tty_colorTable[] =
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{
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{ COLOR_BLACK, "30" },
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{ COLOR_RED, "31" },
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{ COLOR_GREEN, "32" },
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{ COLOR_YELLOW, "33" },
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{ COLOR_BLUE, "34" },
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{ COLOR_CYAN, "36" },
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{ COLOR_MAGENTA, "35" },
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{ COLOR_WHITE, "0" }
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};
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static const int tty_colorTableSize = sizeof( tty_colorTable ) / sizeof( tty_colorTable[0] );
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static void ANSIColorify( const char *msg, char *buffer, int bufferSize )
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{
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int msgLength, pos;
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int i, j;
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const char* escapeCode;
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char tempBuffer[ 7 ];
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if( !msg || !buffer )
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return;
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msgLength = strlen( msg );
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pos = 0;
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i = 0;
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buffer[ 0 ] = '\0';
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while( i < msgLength )
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{
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if( msg[ i ] == '\n' )
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{
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Com_sprintf( tempBuffer, 7, "%c[0m\n", 0x1B );
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strncat( buffer, tempBuffer, bufferSize );
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i++;
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}
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else if( msg[ i ] == Q_COLOR_ESCAPE )
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{
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i++;
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if( i < msgLength )
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{
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escapeCode = NULL;
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for( j = 0; j < tty_colorTableSize; j++ )
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{
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if( msg[ i ] == tty_colorTable[ j ].Q3color )
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{
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escapeCode = tty_colorTable[ j ].ANSIcolor;
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break;
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}
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}
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if( escapeCode )
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{
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Com_sprintf( tempBuffer, 7, "%c[%sm", 0x1B, escapeCode );
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strncat( buffer, tempBuffer, bufferSize );
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}
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i++;
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}
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}
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else
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{
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Com_sprintf( tempBuffer, 7, "%c", msg[ i++ ] );
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strncat( buffer, tempBuffer, bufferSize );
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}
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}
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}
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static char* CleanTermStr( char* string )
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{
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char* s = string;
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char* d = string;
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char c;
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while ((c = *s) != 0 ) {
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if ( Q_IsColorString( s ) )
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s++;
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else
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*d++ = c;
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s++;
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}
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|
*d = '\0';
|
|
|
|
return string;
|
|
}
|
|
|
|
|
|
void Sys_Print( const char *msg )
|
|
{
|
|
static char finalMsg[ MAXPRINTMSG ];
|
|
|
|
if (ttycon_on)
|
|
{
|
|
tty_Hide();
|
|
}
|
|
|
|
if( ttycon_on && ttycon_ansicolor && ttycon_ansicolor->integer )
|
|
{
|
|
ANSIColorify( msg, finalMsg, sizeof(finalMsg) );
|
|
}
|
|
else
|
|
{
|
|
Q_strncpyz( finalMsg, msg, sizeof(finalMsg) );
|
|
CleanTermStr( finalMsg );
|
|
}
|
|
fputs( finalMsg, stdout );
|
|
|
|
if (ttycon_on)
|
|
{
|
|
tty_Show();
|
|
}
|
|
}
|
|
|
|
qbool tty_Enabled()
|
|
{
|
|
return ttycon_on;
|
|
}
|
|
|
|
history_t* tty_GetHistory()
|
|
{
|
|
return &tty_history;
|
|
}
|