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ckTerminal.c
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ckTerminal.c
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/*
*
* This module implements "terminal" widgets for the
* toolkit. Terminals are windows with a background color
* and possibly border, but no other attributes.
*
* A terminal forks a subprocess bound to a fresh pty
*
* Copyright (c) 1990-1994 The Regents of the University of California.
* Copyright (c) 1994-1995 Sun Microsystems, Inc.
* Copyright (c) 1995 Christian Werner
* Copyright (c) 2019 VCA
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "ckPort.h"
#include "ck.h"
#include "default.h"
extern int setenv (const char *__string, const char *__value, int __overwrite);
/*
* Code below is taken form MTM
*/
/* Copyright 2017 - 2019 Rob King <jking@deadpixi.com>
*
* 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 3 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 <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <locale.h>
#include <pwd.h>
#include <signal.h>
#include <stddef.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/types.h>
#include <unistd.h>
#include <wchar.h>
#include <wctype.h>
/**** CONFIGURATION
* VTPARSER_BAD_CHAR is the character that will be displayed when
* an application sends an invalid multibyte sequence to the terminal.
*/
#ifndef VTPARSER_BAD_CHAR
#ifdef __STDC_ISO_10646__
#define VTPARSER_BAD_CHAR ((wchar_t)0xfffd)
#else
#define VTPARSER_BAD_CHAR L'?'
#endif
#endif
/**** DATA TYPES */
#define MAXPARAM 16
#define MAXCALLBACK 128
#define MAXOSC 100
#define MAXBUF 100
typedef struct VTPARSER VTPARSER;
typedef struct STATE STATE;
typedef void (*VTCALLBACK)(VTPARSER *v, void *p, wchar_t w, wchar_t iw,
int argc, int *argv, const wchar_t *osc);
struct VTPARSER {
STATE *s;
int narg;
int nosc;
int args[MAXPARAM];
int inter;
wchar_t oscbuf[MAXOSC + 1];
mbstate_t ms;
void *p;
VTCALLBACK print;
VTCALLBACK osc;
VTCALLBACK cons[MAXCALLBACK];
VTCALLBACK escs[MAXCALLBACK];
VTCALLBACK csis[MAXCALLBACK];
};
typedef enum
{
VTPARSER_CONTROL,
VTPARSER_ESCAPE,
VTPARSER_CSI,
VTPARSER_OSC,
VTPARSER_PRINT
} VtEvent;
/**** FUNCTIONS */
VTCALLBACK
vtonevent(VTPARSER *vp, VtEvent t, wchar_t w, VTCALLBACK cb);
void
vtwrite(VTPARSER *vp, const char *s, size_t n);
/*** CONFIGURATION */
/* mtm by default will advertise itself as a "screen-bce" terminal.
* This is the terminal type advertised by such programs as
* screen(1) and tmux(1) and is a widely-supported terminal type.
* mtm supports emulating the "screen-bce" terminal very well, and this
* is a reasonable default.
*
* However, you can change the default terminal that mtm will
* advertise itself as. There's the "mtm" terminal type that is
* recommended for use if you know it will be available in all the
* environments in which mtm will be used. It advertises a few
* features that mtm has that the default "screen-bce" terminfo doesn't
* list, meaning that terminfo-aware programs may get a small
* speed boost.
*/
#define DEFAULT_TERMINAL "screen-bce"
#define DEFAULT_256_COLOR_TERMINAL "screen-256color-bce"
/* mtm supports a scrollback buffer, allowing users to scroll back
* through the output history of a virtual terminal. The SCROLLBACK
* knob controls how many lines are saved (minus however many are
* currently displayed). 1000 seems like a good number.
*
* Note that every virtual terminal is sized to be at least this big,
* so setting a huge number here might waste memory. It is recommended
* that this number be at least as large as the largest terminal you
* expect to use is tall.
*/
#define SCROLLBACK 1000
/* The default command prefix key, when modified by cntrl.
* This can be changed at runtime using the '-c' flag.
*/
#define COMMAND_KEY 'b'
/* The change focus keys. */
#define MOVE_UP CODE(KEY_UP)
#define MOVE_DOWN CODE(KEY_DOWN)
#define MOVE_RIGHT CODE(KEY_RIGHT)
#define MOVE_LEFT CODE(KEY_LEFT)
#define MOVE_OTHER KEY(L'o')
/* The split terminal keys. */
#define HSPLIT KEY(L'h')
#define VSPLIT KEY(L'v')
/* The delete terminal key. */
#define DELETE_NODE KEY(L'w')
/* The force redraw key. */
#define REDRAW KEY(L'l')
/* The scrollback keys. */
#define SCROLLUP CODE(KEY_PPAGE)
#define SCROLLDOWN CODE(KEY_NPAGE)
#define RECENTER CODE(KEY_END)
/* The path for the wide-character curses library. */
#ifndef NCURSESW_INCLUDE_H
#if defined(__APPLE__) || !defined(__linux__) || defined(__FreeBSD__)
#define NCURSESW_INCLUDE_H <curses.h>
#else
#define NCURSESW_INCLUDE_H <ncursesw/curses.h>
#endif
#endif
#include NCURSESW_INCLUDE_H
/* Includes needed to make forkpty(3) work. */
#ifndef FORKPTY_INCLUDE_H
#if defined(__APPLE__)
#define FORKPTY_INCLUDE_H <util.h>
#elif defined(__FreeBSD__)
#define FORKPTY_INCLUDE_H <libutil.h>
#else
#define FORKPTY_INCLUDE_H <pty.h>
#endif
#endif
#include FORKPTY_INCLUDE_H
/* You probably don't need to alter these much, but if you do,
* here is where you can define alternate character sets.
*
* Note that if your system's wide-character implementation
* maps directly to Unicode, the preferred Unicode characters
* will be used automatically if your system declares such
* support. If it doesn't declare it, define WCHAR_IS_UNICODE to
* force Unicode to be used.
*/
#define MAXMAP 0x7f
static wchar_t CSET_US[MAXMAP]; /* "USASCII"...really just the null table */
#if defined(__STDC_ISO_10646__) || defined(WCHAR_IS_UNICODE)
static wchar_t CSET_UK[MAXMAP] ={ /* "United Kingdom"...really just Pound Sterling */
[L'#'] = 0x00a3
};
static wchar_t CSET_GRAPH[MAXMAP] =
{ /* Graphics Set One */
[L'-'] = 0x2191,
[L'}'] = 0x00a3,
[L'~'] = 0x00b7,
[L'{'] = 0x03c0,
[L','] = 0x2190,
[L'+'] = 0x2192,
[L'.'] = 0x2193,
[L'|'] = 0x2260,
[L'>'] = 0x2265,
[L'`'] = 0x25c6,
[L'a'] = 0x2592,
[L'b'] = 0x2409,
[L'c'] = 0x240c,
[L'd'] = 0x240d,
[L'e'] = 0x240a,
[L'f'] = 0x00b0,
[L'g'] = 0x00b1,
[L'h'] = 0x2592,
[L'i'] = 0x2603,
[L'j'] = 0x2518,
[L'k'] = 0x2510,
[L'l'] = 0x250c,
[L'm'] = 0x2514,
[L'n'] = 0x253c,
[L'o'] = 0x23ba,
[L'p'] = 0x23bb,
[L'q'] = 0x2500,
[L'r'] = 0x23bc,
[L's'] = 0x23bd,
[L't'] = 0x251c,
[L'u'] = 0x2524,
[L'v'] = 0x2534,
[L'w'] = 0x252c,
[L'x'] = 0x2502,
[L'y'] = 0x2264,
[L'z'] = 0x2265,
[L'_'] = L' ',
[L'0'] = 0x25ae
};
#else /* wchar_t doesn't map to Unicode... */
static wchar_t CSET_UK[] =
{ /* "United Kingdom"...really just Pound Sterling */
[L'#'] = L'&'
};
static wchar_t CSET_GRAPH[] =
{ /* Graphics Set One */
[L'-'] = '^',
[L'}'] = L'&',
[L'~'] = L'o',
[L'{'] = L'p',
[L','] = L'<',
[L'+'] = L'>',
[L'.'] = L'v',
[L'|'] = L'!',
[L'>'] = L'>',
[L'`'] = L'+',
[L'a'] = L':',
[L'b'] = L' ',
[L'c'] = L' ',
[L'd'] = L' ',
[L'e'] = L' ',
[L'f'] = L'\'',
[L'g'] = L'#',
[L'h'] = L'#',
[L'i'] = L'i',
[L'j'] = L'+',
[L'k'] = L'+',
[L'l'] = L'+',
[L'm'] = L'+',
[L'n'] = '+',
[L'o'] = L'-',
[L'p'] = L'-',
[L'q'] = L'-',
[L'r'] = L'-',
[L's'] = L'_',
[L't'] = L'+',
[L'u'] = L'+',
[L'v'] = L'+',
[L'w'] = L'+',
[L'x'] = L'|',
[L'y'] = L'<',
[L'z'] = L'>',
[L'_'] = L' ',
[L'0'] = L'#',
};
#endif
#define MIN(x, y) ((x) < (y)? (x) : (y))
#define MAX(x, y) ((x) > (y)? (x) : (y))
#define CTL(x) ((x) & 0x1f)
/*** DATA TYPES */
typedef struct SCRN SCRN;
struct SCRN {
int sy; /* saved cursor y position */
int sx; /* saved cursor x position */
int vis;
int tos; /* Top os screen */
int off; /* Offset */
short wbg; /* window background */
short wfg; /* window foreground */
short fg; /* current foreground color */
short bg; /* current background color */
short sfg; /* saved foreground */
short sbg; /* saved background */
short sp;
bool insert;
bool oxenl; /* saved xenl */
bool xenl;
bool saved; /* if true saved cursor done */
attr_t sattr; /* saved attributes */
WINDOW *win; /* curses window - it is a pad */
};
typedef struct NODE NODE;
struct NODE {
int h; /* height of terminal */
int w; /* width of terminal */
int pt; /* Pseudo-TTY bound to subprocess (i.e. shell) */
int ntabs; /* number of tabs */
bool *tabs; /* dynamically allocated tab stops array */
bool pnm;
bool decom;
bool am;
bool lnm;
wchar_t repc; /* char to repeat */
SCRN pri; /* primary screen */
SCRN alt; /* alternate screen */
SCRN *s; /* active screen , points to pri or alt member */
wchar_t *g0, *g1, *g2, *g3, *gc, *gs, *sgc, *sgs;
VTPARSER vp; /* used to parse input stream from bound pseudo-TTY */
char iobuf[BUFSIZ]; /* buffer for character input */
bool cmd; /* true if in command mode */
void *clientData; /* pointer to extra data */
};
// --------------------------------------------------------------------------
/*
* A data structure of the following type is kept for each
* terminal that currently exists for this process:
*/
typedef struct Terminal_s {
CkWindow *winPtr; /* Window that embodies the terminal. NULL
* means that the window has been destroyed
* but the data structures haven't yet been
* cleaned up.*/
Tcl_Interp *interp; /* Interpreter associated with widget.
* Used to delete widget command. */
Tcl_Command widgetCmd; /* Token for terminal's widget command. */
CkBorder *borderPtr; /* Structure used to draw border. */
int fg, bg; /* Foreground/background colors. */
int attr; /* Video attributes. */
int width; /* Width to request for window. <= 0 means
* don't request any size. */
int height; /* Height to request for window. <= 0 means
* don't request any size. */
char *takeFocus; /* Value of -takefocus option. */
char *commandkey; /* Value of -commandkey option. */
char *banner; /* Welcome banner to display */
char *title; /* Title of terminal */
int flags; /* Various flags; see below for
* definitions. */
char *term; /* terminal type a default value is computed */
char *exec; /* command to execute - default to user $SHELL
environment variable */
int nexec; /* number of elements in splitted version of exec */
char **aexec; /* splitted version of exec - used for process fork */
int scrollback; /* size of terminal scrollback buffer */
char *yscrollcommand; /* y-scroll command */
int redisplayPolicy; /* update display policy
* POLICY_NONE : widget will be updated once
* all the pending input from pty
* has been preocessed.
* POLICY_LINE : widget will be updated
* each time a newline is received.
* number > 0 : widget is updated each time
* this amount of bytes has been read
* from the pty channel. */
int count; /* received characters counter used for redisplay */
int yview; /* used while scrolling through the buffer */
Tcl_Channel tee; /* channel where pty input stream gets duplicated */
Ck_Uid bindings[0x7f]; /* binding table for terminal commands
* indexed by ASCII keycode, value id not 0
* is the virtual event to emit. */
NODE *node; /* pointer to terminal object */
} Terminal;
/*
* Flag bits for terminals:
*
* REDRAW_PENDING: Non-zero means a DoWhenIdle handler
* has already been queued to redraw
* this window.
*
* DISCONNECTED: Bound subprocess (shell) is finished
*
* MODE_INTERACT: The user interacts with the terminal
* using mouse and keyboard. Keys and mouse events
* are sent to the subprocess (through opened pty)
*
* MODE_COMMAND: The user interacts with the terminal
* using mouse and keyboard. BUT Keys and mouse events
* are not sent to the forked subprocess.
* They are interpreted to move around in the buffer.
*
*/
#define REDRAW_PENDING 1
#define DISCONNECTED 2
#define MODE_INTERACT 4
#define MODE_COMMAND 8
#define HAS_FOCUS 16
#define DISPLAY_BANNER 32
#define DISPLAY_TRAILER 64
#define MOUSE_REPORT_1000 128 /* if set mouse buttons events are forwarded */
#define MOUSE_REPORT_1001 256 /* unsupported mouse mode */
#define MOUSE_REPORT_1002 512 /* if set mouse motion & buttons events are forwarded */
#define MOUSE_REPORT_1003 (MOUSE_REPORT_1000 | MOUSE_REPORT_1002)
#define MOUSE_REPORT (MOUSE_REPORT_1000 | MOUSE_REPORT_1002 | MOUSE_REPORT_1003)
#define BINDING_IGNORE ((char*)0x01)
static int ExecParseProc(ClientData clientData,
Tcl_Interp *interp, CkWindow *winPtr,
char *value, char *widgRec, int offset);
static char *ExecPrintProc(ClientData clientData,
CkWindow *winPtr, char *widgRec, int offset,
Tcl_FreeProc **freeProcPtr);
static Ck_CustomOption ExecCustomOption =
{ ExecParseProc, ExecPrintProc, NULL };
static int TermParseProc(ClientData clientData,
Tcl_Interp *interp, CkWindow *winPtr,
char *value, char *widgRec, int offset);
static char *TermPrintProc(ClientData clientData,
CkWindow *winPtr, char *widgRec, int offset,
Tcl_FreeProc **freeProcPtr);
static Ck_CustomOption TermCustomOption =
{ TermParseProc, TermPrintProc, NULL };
static int RedisplayPolicyParseProc(ClientData clientData,
Tcl_Interp *interp, CkWindow *winPtr,
char *value, char *widgRec, int offset);
static char *RedisplayPolicyPrintProc(ClientData clientData,
CkWindow *winPtr, char *widgRec, int offset,
Tcl_FreeProc **freeProcPtr);
static Ck_CustomOption RedisplayPolicyCustomOption =
{ RedisplayPolicyParseProc, RedisplayPolicyPrintProc, NULL };
static Ck_ConfigSpec configSpecs[] = {
{CK_CONFIG_ATTR, "-attributes", "attributes", "Attributes",
DEF_TERMINAL_ATTRIB, Ck_Offset(Terminal, attr), 0},
{CK_CONFIG_COLOR, "-background", "background", "Background",
DEF_TERMINAL_BG_COLOR, Ck_Offset(Terminal, bg), CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_COLOR, "-background", "background", "Background",
DEF_TERMINAL_BG_MONO, Ck_Offset(Terminal, bg), CK_CONFIG_MONO_ONLY},
{CK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
(char *) NULL, 0, 0},
{CK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
DEF_TERMINAL_FG_COLOR, Ck_Offset(Terminal, fg), CK_CONFIG_COLOR_ONLY},
{CK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
DEF_TERMINAL_FG_MONO, Ck_Offset(Terminal, fg), CK_CONFIG_MONO_ONLY},
{CK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
(char *) NULL, 0, 0},
{CK_CONFIG_BORDER, "-border", "border", "Border",
DEF_TERMINAL_BORDER, Ck_Offset(Terminal, borderPtr), CK_CONFIG_NULL_OK},
{CK_CONFIG_COORD, "-height", "height", "Height",
DEF_TERMINAL_HEIGHT, Ck_Offset(Terminal, height), 0},
{CK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
DEF_TERMINAL_TAKE_FOCUS, Ck_Offset(Terminal, takeFocus),
CK_CONFIG_NULL_OK},
{CK_CONFIG_COORD, "-width", "width", "Width",
DEF_TERMINAL_WIDTH, Ck_Offset(Terminal, width), 0},
{CK_CONFIG_CUSTOM, "-exec", "exec", "Exec",
DEF_TERMINAL_EXEC, Ck_Offset(Terminal, exec),
CK_CONFIG_NULL_OK, &ExecCustomOption },
{CK_CONFIG_CUSTOM, "-term", "term", "Term",
DEF_TERMINAL_TERM, Ck_Offset(Terminal, term),
CK_CONFIG_NULL_OK, &TermCustomOption },
{CK_CONFIG_CUSTOM, "-redisplay", "redisplay", "Redisplay",
DEF_TERMINAL_REDISPLAY, Ck_Offset(Terminal, redisplayPolicy),
CK_CONFIG_NULL_OK, &RedisplayPolicyCustomOption },
{CK_CONFIG_INT, "-scrollback", "scrollback", "Scrollback",
DEF_TERMINAL_SCROLLBACK, Ck_Offset(Terminal, scrollback), 0},
{CK_CONFIG_STRING, "-yscrollcommand", "yscrollcommand", "YScrollCommand",
(char*) NULL, Ck_Offset(Terminal, yscrollcommand), CK_CONFIG_NULL_OK},
{CK_CONFIG_STRING, "-commandkey", "commandkey", "CommandKey",
DEF_TERMINAL_COMMANDKEY, Ck_Offset(Terminal, commandkey), 0},
{CK_CONFIG_STRING, "-banner", "banner", "Banner",
DEF_TERMINAL_COMMANDKEY, Ck_Offset(Terminal, banner), 0},
{CK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
(char *) NULL, 0, 0}
};
/*
* Forward declarations for procedures defined later in this file:
*/
static int ConfigureTerminal _ANSI_ARGS_((Tcl_Interp *interp,
Terminal *terminalPtr, int argc, char **argv, int flags));
static void DestroyTerminal _ANSI_ARGS_((ClientData clientData));
static void TerminalCmdDeletedProc _ANSI_ARGS_((ClientData clientData));
static void DisplayTerminal _ANSI_ARGS_((ClientData clientData));
static void TerminalEventProc _ANSI_ARGS_((ClientData clientData,
CkEvent *eventPtr));
static int TerminalWidgetCmd _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, char **argv));
static void TerminalKeyEventProc _ANSI_ARGS_((ClientData clientData,
CkEvent *eventPtr));
static void TerminalMouseEventProc _ANSI_ARGS_((ClientData clientData,
CkEvent *eventPtr));
static void TerminalPtyProc _ANSI_ARGS_((ClientData clientData, int flags));
static void SendToTerminal _ANSI_ARGS_((Terminal *terminalPtr, char *text));
static void TerminalPostRedisplay _ANSI_ARGS_((Terminal *terminalPtr));
static void TerminalYScrollCommand _ANSI_ARGS_((ClientData clientData));
static int TerminalYView _ANSI_ARGS_((Terminal *terminalPtr,
int argc, char **argv));
static int TerminalTee _ANSI_ARGS_((Terminal *terminalPtr,
int argc, char **argv));
// --------------------------------------------------------------------------
/*** GLOBALS AND PROTOTYPES */
static void setupevents(NODE *n);
static void reshape(NODE *n, int h, int w);
static void draw(NODE *n);
static void freenode(NODE *n);
static void fixcursor(NODE *n);
static int
safewrite(int fd, const char *b, size_t n) /* Write, checking for errors. */
{
size_t w = 0;
if ( fd<0 ) return 0;
while (w < n){
ssize_t s = write(fd, b + w, n - w);
if (s < 0 && errno != EINTR)
return w;
else if (s < 0)
s = 0;
w += (size_t)s;
}
return w;
}
/*** TERMINAL EMULATION HANDLERS
* These functions implement the various terminal commands activated by
* escape sequences and printing to the terminal. Large amounts of boilerplate
* code is shared among all these functions, and is factored out into the
* macros below:
* PD(n, d) - Parameter n, with default d.
* P0(n) - Parameter n, default 0.
* P1(n) - Parameter n, default 1.
* CALL(h) - Call handler h with no arguments.
* SENDN(n, s, c) - Write string c bytes of s to n.
* SEND(n, s) - Write string s to node n's host.
* (END)HANDLER - Declare/end a handler function
* COMMONVARS - All of the common variables for a handler.
* x, y - cursor position
* mx, my - max possible values for x and y
* px, py - physical cursor position in scrollback
* n - the current node
* win - the current window
* top, bot - the scrolling region
* tos - top of the screen in the pad
* s - the current SCRN buffer
* The funny names for handlers are from their ANSI/ECMA/DEC mnemonics.
*/
#define PD(x, d) (argc < (x) || !argv? (d) : argv[(x)])
#define P0(x) PD(x, 0)
#define P1(x) (!P0(x)? 1 : P0(x))
#define CALL(x) (x)(v, n, 0, 0, 0, NULL, NULL)
#define SENDN(n, s, c) safewrite(n->pt, s, c)
#define SEND(n, s) SENDN(n, s, strlen(s))
#define COMMONVARS \
NODE *n = (NODE *)p; \
SCRN *s = n->s; \
WINDOW *win = s->win; \
Terminal *term = (Terminal *) n->clientData; \
WINDOW *winterm = term->winPtr->window; \
int py, px, y, x, my, mx, top = 0, bot = 0, tos = s->tos; \
(void)v; (void)p; (void)w; (void)iw; (void)argc; (void)argv; \
(void)win; (void)y; (void)x; (void)my; (void)mx; (void)osc; \
(void)tos; \
getyx(win, py, px); y = py - s->tos; x = px; \
getmaxyx(win, my, mx); my -= s->tos; \
wgetscrreg(win, &top, &bot); \
bot++; bot -= s->tos; \
top = top <= tos? 0 : top - tos; \
#define HANDLER(name) \
static void \
name (VTPARSER *v, void *p, wchar_t w, wchar_t iw, \
int argc, int *argv, const wchar_t *osc) \
{ COMMONVARS
#define ENDHANDLER n->repc = 0; } /* control sequences aren't repeated */
/*
*--------------------------------------------------------------------------
* Terminal bell.
*--------------------------------------------------------------------------
*/
HANDLER(bell) {
beep();
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* Application/Numeric Keypad Mode
*--------------------------------------------------------------------------
*/
HANDLER(numkp) {
n->pnm = (w == L'=');
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* Cursor visibility
*--------------------------------------------------------------------------
*/
HANDLER(vis) {
s->vis = iw == L'6'? 0 : 1;
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* CUP - Cursor Position
*--------------------------------------------------------------------------
*/
HANDLER(cup) {
s->xenl = false;
wmove(win, tos + (n->decom? top : 0) + P1(0) - 1, P1(1) - 1);
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* DCH - Delete Character
*--------------------------------------------------------------------------
*/
HANDLER(dch) {
for (int i = 0; i < P1(0); i++) {
wdelch(win);
}
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* ICH - Insert Character
*--------------------------------------------------------------------------
*/
HANDLER(ich) {
for (int i = 0; i < P1(0); i++) {
wins_nwstr(win, L" ", 1);
}
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* CUU - Cursor Up
*--------------------------------------------------------------------------
*/
HANDLER(cuu) {
wmove(win, MAX(py - P1(0), tos + top), x);
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* CUD - Cursor Down
*--------------------------------------------------------------------------
*/
HANDLER(cud) {
wmove(win, MIN(py + P1(0), tos + bot - 1), x);
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* CUF - Cursor Forward
*--------------------------------------------------------------------------
*/
HANDLER(cuf) {
wmove(win, py, MIN(x + P1(0), mx - 1));
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* ACK - Acknowledge Enquiry
*--------------------------------------------------------------------------
*/
HANDLER(ack) {
SEND(n, "\006");
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* HTS - Horizontal Tab Set
*--------------------------------------------------------------------------
*/
HANDLER(hts) {
if (x < n->ntabs && x > 0)
n->tabs[x] = true;
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* RI - Reverse Index
*--------------------------------------------------------------------------
*/
HANDLER(ri) {
int otop = 0, obot = 0;
wgetscrreg(win, &otop, &obot);
wsetscrreg(win, otop >= tos? otop : tos, obot);
y == top? wscrl(win, -1) : wmove(win, MAX(tos, py - 1), x);
wsetscrreg(win, otop, obot);
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* DECID - Send Terminal Identification
*--------------------------------------------------------------------------
*/
HANDLER(decid) {
if (w == L'c') {
SEND(n, iw == L'>'? "\033[>1;10;0c" : "\033[?1;2c");
} else if (w == L'Z') {
SEND(n, "\033[?6c");
}
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* HPA - Cursor Horizontal Absolute
*--------------------------------------------------------------------------
*/
HANDLER(hpa) {
wmove(win, py, MIN(P1(0) - 1, mx - 1));
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* HPR - Cursor Horizontal Relative
*--------------------------------------------------------------------------
*/
HANDLER(hpr) {
wmove(win, py, MIN(px + P1(0), mx - 1));
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* VPA - Cursor Vertical Absolute
*--------------------------------------------------------------------------
*/
HANDLER(vpa) {
wmove(win, MIN(tos + bot - 1, MAX(tos + top, tos + P1(0) - 1)), x);
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* VPR - Cursor Vertical Relative
*--------------------------------------------------------------------------
*/
HANDLER(vpr) {
wmove(win, MIN(tos + bot - 1, MAX(tos + top, py + P1(0))), x);
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* CBT - Cursor Backwards Tab
*--------------------------------------------------------------------------
*/
HANDLER(cbt) {
for (int i = x - 1; i < n->ntabs && i >= 0; i--) {
if (n->tabs[i]) {
wmove(win, py, i);
fixcursor(n);
return;
}
}
wmove(win, py, 0);
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* HT - Horizontal Tab
*--------------------------------------------------------------------------
*/
HANDLER(ht) {
for (int i = x + 1; i < n->w && i < n->ntabs; i++) {
if (n->tabs[i]) {
wmove(win, py, i);
fixcursor(n);
return;
}
}
wmove(win, py, mx - 1);
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* Tab forwards or backwards
*--------------------------------------------------------------------------
*/
HANDLER(tab) {
for (int i = 0; i < P1(0); i++) {
switch (w) {
case L'I': CALL(ht); break;
case L'\t': CALL(ht); break;
case L'Z': CALL(cbt); break;
}
}
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* DECALN - Screen Alignment Test
*--------------------------------------------------------------------------
*/
HANDLER(decaln) {
chtype e[] = {COLOR_PAIR(0) | 'E', 0};
for (int r = 0; r < my; r++) {
for (int c = 0; c <= mx; c++) {
mvwaddchnstr(win, tos + r, c, e, 1);
}
}
wmove(win, py, px);
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* SU - Scroll Up/Down
*--------------------------------------------------------------------------
*/
HANDLER(su) {
wscrl(win, (w == L'T' || w == L'^')? -P1(0) : P1(0));
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* SC - Save Cursor
*--------------------------------------------------------------------------
*/
HANDLER(sc) {
s->sx = px; /* save X position */
s->sy = py; /* save Y position */
wattr_get(win, &s->sattr, &s->sp, NULL); /* save attrs and color pair */
s->sfg = s->fg; /* save foreground color */
s->sbg = s->bg; /* save background color */
s->oxenl = s->xenl; /* save xenl state */
s->saved = true; /* save data is valid */
n->sgc = n->gc; n->sgs = n->gs; /* save character sets */
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* RC - Restore Cursor
*--------------------------------------------------------------------------
*/
HANDLER(rc) {
if (iw == L'#'){
CALL(decaln);
return;
}
if (!s->saved)
return;
wmove(win, s->sy, s->sx); /* get old position */
wattr_set(win, s->sattr, s->sp, NULL); /* get attrs and color pair */
s->fg = s->sfg; /* get foreground color */
s->bg = s->sbg; /* get background color */
s->xenl = s->oxenl; /* get xenl state */
n->gc = n->sgc; n->gs = n->sgs; /* save character sets */
/* restore colors */
int cp = Ck_GetPair(term->winPtr, s->fg, s->bg); cp = PAIR_NUMBER(cp);
wcolor_set(win, cp, NULL);
cchar_t c;
setcchar(&c, L" ", A_NORMAL, cp, NULL);
wbkgrndset(win, &c);
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* TBC - Tabulation Clear
*--------------------------------------------------------------------------
*/
HANDLER(tbc) {
switch (P0(0)){
case 0: n->tabs[x < n->ntabs? x : 0] = false; break;
case 3: memset(n->tabs, 0, sizeof(bool) * (n->ntabs)); break;
}
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* CUB - Cursor Backward
*--------------------------------------------------------------------------
*/
HANDLER(cub) {
s->xenl = false;
wmove(win, py, MAX(x - P1(0), 0));
fixcursor(n);
ENDHANDLER;
}
/*
*--------------------------------------------------------------------------
* EL - Erase in Line
*--------------------------------------------------------------------------