969 lines
19 KiB
C
969 lines
19 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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/* Portions of this file are Copyright 9front's team.
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* See /doc/license/9front-mit for details about the licensing.
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* See http://code.9front.org/hg/plan9front/ for a list of authors.
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*/
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/*
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* Known bugs:
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*
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* 1. We don't handle cursor movement characters inside escape sequences.
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* That is, ESC[2C moves two to the right, so ESC[2\bC is supposed to back
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* up one and then move two to the right.
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*
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* 2. We don't handle tabstops past nelem(tabcol) columns.
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*
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* 3. We don't respect requests to do reverse video for the whole screen.
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*
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* 4. We ignore the ESC#n codes, so that we don't do double-width nor
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* double-height lines, nor the ``fill the screen with E's'' confidence check.
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*
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* 5. Cursor key sequences aren't selected by keypad application mode.
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*
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* 6. "VT220" mode (-2) currently just switches the default cursor key
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* functions (same as -a); it's still just a VT100 emulation.
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*
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* 7. VT52 mode and a few other rarely used features are not implemented.
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*/
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#include <u.h>
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#include <lib9.h>
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#include <draw.h>
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#include "cons.h"
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#include <ctype.h>
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int wraparound = 1;
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int originrelative = 0;
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int tabcol[200];
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struct funckey ansifk[] = {
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{ "up key", "\033[A", },
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{ "down key", "\033[B", },
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{ "left key", "\033[D", },
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{ "right key", "\033[C", },
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{ "F1", "\033OP", },
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{ "F2", "\033OQ", },
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{ "F3", "\033OR", },
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{ "F4", "\033OS", },
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{ "F5", "\033OT", },
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{ "F6", "\033OU", },
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{ "F7", "\033OV", },
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{ "F8", "\033OW", },
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{ "F9", "\033OX", },
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{ "F10", "\033OY", },
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{ "F11", "\033OZ", },
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{ "F12", "\033O1", },
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{ 0 },
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};
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struct funckey ansiappfk[] = {
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{ "up key", "\033OA", },
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{ "down key", "\033OB", },
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{ "left key", "\033OD", },
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{ "right key", "\033OC", },
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{ 0 },
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};
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struct funckey vt220fk[] = {
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{ "insert", "\033[2~", },
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{ "delete", "\033[3~", },
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{ "home", "\033[1~", },
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{ "end", "\033[4~", },
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{ "page up", "\033[5~", },
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{ "page down", "\033[6~", },
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{ "up key", "\033[A", },
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{ "down key", "\033[B", },
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{ "left key", "\033[D", },
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{ "right key", "\033[C", },
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{ "F1", "\033OP", },
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{ "F2", "\033OQ", },
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{ "F3", "\033OR", },
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{ "F4", "\033OS", },
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{ "F5", "\033[15~", },
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{ "F6", "\033[17~", },
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{ "F7", "\033[18~", },
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{ "F8", "\033[19~", },
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{ "F9", "\033[20~", },
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{ "F10", "\033[21~", },
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{ "F11", "\033[23~", },
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{ "F12", "\033[24~", },
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{ 0 },
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};
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char gmap[256] = {
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['_'] ' ', /* blank */
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['\\'] '*', /* diamond */
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['a'] 'X', /* checkerboard */
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['b'] '\t', /* HT */
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['c'] '\x0C', /* FF */
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['d'] '\r', /* CR */
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['e'] '\n', /* LF */
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['f'] 'o', /* degree */
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['g'] '+', /* plus/minus */
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['h'] '\n', /* NL, but close enough */
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['i'] '\v', /* VT */
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['j'] '+', /* lower right corner */
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['k'] '+', /* upper right corner */
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['l'] '+', /* upper left corner */
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['m'] '+', /* lower left corner */
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['n'] '+', /* crossing lines */
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['o'] '-', /* horiz line - scan 1 */
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['p'] '-', /* horiz line - scan 3 */
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['q'] '-', /* horiz line - scan 5 */
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['r'] '-', /* horiz line - scan 7 */
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['s'] '-', /* horiz line - scan 9 */
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['t'] '+', /* |- */
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['u'] '+', /* -| */
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['v'] '+', /* upside down T */
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['w'] '+', /* rightside up T */
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['x'] '|', /* vertical bar */
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['y'] '<', /* less/equal */
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['z'] '>', /* gtr/equal */
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['{'] 'p', /* pi */
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['|'] '!', /* not equal */
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['}'] 'L', /* pound symbol */
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['~'] '.', /* centered dot: · */
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};
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static void setattr(int argc, int *argv);
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static void osc(void);
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void
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fixops(int *operand)
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{
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if(operand[0] < 1)
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operand[0] = 1;
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}
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void
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emulate(void)
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{
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Rune buf[BUFS+1];
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int i;
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int n;
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int c;
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int operand[10];
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int noperand;
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int savex, savey, saveattr, saveisgraphics;
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int isgraphics;
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int g0set, g1set;
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isgraphics = 0;
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g0set = 'B'; /* US ASCII */
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g1set = 'B'; /* US ASCII */
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savex = savey = 0;
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yscrmin = 0;
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yscrmax = ymax;
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saveattr = 0;
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saveisgraphics = 0;
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/* set initial tab stops to DEC-standard 8-column spacing */
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for(c=0; (c+=8)<nelem(tabcol);)
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tabcol[c] = 1;
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for (;;) {
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if (y > ymax) {
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x = 0;
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newline();
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}
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buf[0] = get_next_char();
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buf[1] = '\0';
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switch(buf[0]) {
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case '\000':
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case '\001':
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case '\002':
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case '\003':
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case '\004':
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case '\005':
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case '\006':
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goto Default;
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case '\007': /* bell */
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ringbell();
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break;
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case '\010': /* backspace */
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if (x > 0)
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--x;
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break;
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case '\011': /* tab to next tab stop; if none, to right margin */
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for(c=x+1; c<nelem(tabcol) && !tabcol[c]; c++)
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;
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if(c < nelem(tabcol))
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x = c;
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else
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x = xmax;
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break;
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case '\012': /* linefeed */
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case '\013':
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case '\014':
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newline();
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if (ttystate[cs->raw].nlcr)
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x = 0;
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break;
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case '\015': /* carriage return */
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x = 0;
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if (ttystate[cs->raw].crnl)
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newline();
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break;
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case '\016': /* SO: invoke G1 char set */
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isgraphics = (isdigit(g1set));
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break;
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case '\017': /* SI: invoke G0 char set */
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isgraphics = (isdigit(g0set));
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break;
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case '\020': /* DLE */
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case '\021': /* DC1 */
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case '\022': /* XON */
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case '\023': /* DC3 */
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case '\024': /* XOFF */
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case '\025': /* NAK */
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case '\026': /* SYN */
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case '\027': /* ETB */
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case '\030': /* CAN: cancel escape sequence, display checkerboard (not implemented) */
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case '\031': /* EM */
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case '\032': /* SUB: same as CAN */
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goto Default;
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;
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/* ESC, \033, is handled below */
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case '\034': /* FS */
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case '\035': /* GS */
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case '\036': /* RS */
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case '\037': /* US */
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break;
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case '\177': /* delete: ignored */
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break;
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case '\033':
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switch(get_next_char()){
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/*
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* 1 - graphic processor option on (no-op; not installed)
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*/
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case '1':
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break;
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/*
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* 2 - graphic processor option off (no-op; not installed)
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*/
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case '2':
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break;
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/*
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* 7 - save cursor position.
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*/
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case '7':
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savex = x;
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savey = y;
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saveattr = attr;
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saveisgraphics = isgraphics;
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break;
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/*
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* 8 - restore cursor position.
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*/
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case '8':
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x = savex;
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y = savey;
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attr = saveattr;
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isgraphics = saveisgraphics;
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break;
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/*
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* c - Reset terminal.
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*/
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case 'c':
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cursoron = 1;
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ttystate[cs->raw].nlcr = 0;
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break;
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/*
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* D - active position down a line, scroll if at bottom margin.
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* (Original VT100 had a bug: tracked new-line/line-feed mode.)
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*/
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case 'D':
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if(++y > yscrmax) {
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y = yscrmax;
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scroll(yscrmin+1, yscrmax+1, yscrmin, yscrmax);
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}
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break;
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/*
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* E - active position to start of next line, scroll if at bottom margin.
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*/
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case 'E':
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x = 0;
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if(++y > yscrmax) {
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y = yscrmax;
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scroll(yscrmin+1, yscrmax+1, yscrmin, yscrmax);
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}
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break;
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/*
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* H - set tab stop at current column.
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* (This is cursor home in VT52 mode (not implemented).)
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*/
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case 'H':
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if(x < nelem(tabcol))
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tabcol[x] = 1;
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break;
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/*
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* M - active position up a line, scroll if at top margin..
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*/
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case 'M':
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if(--y < yscrmin) {
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y = yscrmin;
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scroll(yscrmin, yscrmax, yscrmin+1, yscrmin);
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}
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break;
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/*
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* Z - identification. the terminal
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* emulator will return the response
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* code for a generic VT100.
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*/
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case 'Z':
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Ident:
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sendnchars(7, "\033[?1;2c"); /* VT100 with AVO option */
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break;
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/*
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* < - enter ANSI mode
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*/
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case '<':
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break;
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/*
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* > - set numeric keypad mode on (not implemented)
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*/
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case '>':
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break;
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/*
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* = - set numeric keypad mode off (not implemented)
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*/
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case '=':
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break;
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/*
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* # - Takes a one-digit argument
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*/
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case '#':
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switch(get_next_char()){
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case '3': /* Top half of double-height line */
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case '4': /* Bottom half of double-height line */
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case '5': /* Single-width single-height line */
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case '6': /* Double-width line */
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case '7': /* Screen print */
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case '8': /* Fill screen with E's */
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break;
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}
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break;
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/*
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* ( - switch G0 character set
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*/
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case '(':
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g0set = get_next_char();
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break;
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/*
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* - switch G1 character set
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*/
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case ')':
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g1set = get_next_char();
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break;
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/*
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* Received left bracket.
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*/
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case '[':
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/*
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* A semi-colon or ? delimits arguments.
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*/
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memset(operand, 0, sizeof(operand));
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operand[0] = number(buf, &i);
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noperand = 1;
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while(buf[0] == ';' || buf[0] == '?'){
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if(noperand < nelem(operand)){
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noperand++;
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operand[noperand-1] = number(buf, nil);
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} else
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number(buf, nil);
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}
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/*
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* do escape2 stuff
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*/
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switch(buf[0]){
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/*
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* c - same as ESC Z: what are you?
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*/
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case 'c':
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goto Ident;
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/*
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* g - various tabstop manipulation
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*/
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case 'g':
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switch(operand[0]){
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case 0: /* clear tab at current column */
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if(x < nelem(tabcol))
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tabcol[x] = 0;
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break;
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case 3: /* clear all tabs */
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memset(tabcol, 0, sizeof tabcol);
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break;
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}
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break;
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/*
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* l - clear various options.
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*/
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case 'l':
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if(noperand == 1){
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switch(operand[0]){
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case 20: /* set line feed mode */
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ttystate[cs->raw].nlcr = 1;
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break;
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case 30: /* screen invisible (? not supported through VT220) */
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break;
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}
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}else while(--noperand > 0){
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switch(operand[noperand]){
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case 1: /* set cursor keys to send ANSI functions: ESC [ A..D */
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appfk = nil;
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break;
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case 2: /* set VT52 mode (not implemented) */
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break;
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case 3: /* set 80 columns */
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setdim(-1, 80);
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break;
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case 4: /* set jump scrolling */
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break;
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case 5: /* set normal video on screen */
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break;
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case 6: /* set origin to absolute */
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originrelative = 0;
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x = y = 0;
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break;
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case 7: /* reset auto-wrap mode */
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wraparound = 0;
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break;
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case 8: /* reset auto-repeat mode */
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break;
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case 9: /* reset interlacing mode */
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break;
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case 25: /* text cursor off (VT220) */
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cursoron = 0;
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break;
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}
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}
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break;
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/*
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* s - some dec private stuff. actually [ ? num s, but we can't detect it.
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*/
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case 's':
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break;
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/*
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* h - set various options.
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*/
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case 'h':
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if(noperand == 1){
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switch(operand[0]){
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default:
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break;
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case 20: /* set newline mode */
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ttystate[cs->raw].nlcr = 0;
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break;
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case 30: /* screen visible (? not supported through VT220) */
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break;
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}
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}else while(--noperand > 0){
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switch(operand[noperand]){
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default:
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break;
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case 1: /* set cursor keys to send application function: ESC O A..D */
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appfk = ansiappfk;
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break;
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case 2: /* set ANSI */
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break;
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case 3: /* set 132 columns */
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setdim(-1, 132);
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break;
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case 4: /* set smooth scrolling */
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break;
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case 5: /* set screen to reverse video (not implemented) */
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break;
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case 6: /* set origin to relative */
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originrelative = 1;
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x = 0;
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y = yscrmin;
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break;
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case 7: /* set auto-wrap mode */
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wraparound = 1;
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break;
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case 8: /* set auto-repeat mode */
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break;
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case 9: /* set interlacing mode */
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break;
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case 25: /* text cursor on (VT220) */
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cursoron = 1;
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break;
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}
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}
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break;
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/*
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* m - change character attrs.
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*/
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case 'm':
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setattr(noperand, operand);
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break;
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/*
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* n - request various reports
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*/
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case 'n':
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switch(operand[0]){
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case 5: /* status */
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sendnchars(4, "\033[0n"); /* terminal ok */
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break;
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case 6: /* cursor position */
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sendnchars(sprint((char*)buf, "\033[%d;%dR",
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originrelative ? y+1 - yscrmin : y+1, x+1), (char*)buf);
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break;
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}
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break;
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/*
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* q - turn on list of LEDs; turn off others.
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*/
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case 'q':
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break;
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/*
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* r - change scrolling region. operand[0] is
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* min scrolling region and operand[1] is max
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* scrolling region.
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*/
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case 'r':
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yscrmin = 0;
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yscrmax = ymax;
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switch(noperand){
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case 2:
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yscrmax = operand[1]-1;
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if(yscrmax > ymax)
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yscrmax = ymax;
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case 1:
|
|
yscrmin = operand[0]-1;
|
|
if(yscrmin < 0)
|
|
yscrmin = 0;
|
|
}
|
|
x = 0;
|
|
y = yscrmin;
|
|
break;
|
|
|
|
/*
|
|
* x - report terminal parameters
|
|
*/
|
|
case 'x':
|
|
sendnchars(20, "\033[3;1;1;120;120;1;0x");
|
|
break;
|
|
|
|
/*
|
|
* y - invoke confidence test
|
|
*/
|
|
case 'y':
|
|
break;
|
|
|
|
/*
|
|
* z - line spacing
|
|
*/
|
|
case 'z':
|
|
break;
|
|
|
|
/*
|
|
* A - cursor up.
|
|
*/
|
|
case 'e':
|
|
case 'A':
|
|
fixops(operand);
|
|
y -= operand[0];
|
|
if(y < yscrmin)
|
|
y = yscrmin;
|
|
olines -= operand[0];
|
|
if(olines < 0)
|
|
olines = 0;
|
|
break;
|
|
|
|
/*
|
|
* B - cursor down
|
|
*/
|
|
case 'B':
|
|
fixops(operand);
|
|
y += operand[0];
|
|
if(y > yscrmax)
|
|
y=yscrmax;
|
|
break;
|
|
|
|
/*
|
|
* C - cursor right
|
|
*/
|
|
case 'a':
|
|
case 'C':
|
|
fixops(operand);
|
|
x += operand[0];
|
|
/*
|
|
* VT-100-UG says not to go past the
|
|
* right margin.
|
|
*/
|
|
if(x > xmax)
|
|
x = xmax;
|
|
break;
|
|
|
|
/*
|
|
* D - cursor left
|
|
*/
|
|
case 'D':
|
|
fixops(operand);
|
|
x -= operand[0];
|
|
if(x < 0)
|
|
x = 0;
|
|
break;
|
|
|
|
/*
|
|
* G - cursor to column
|
|
*/
|
|
case '\'':
|
|
case 'G':
|
|
fixops(operand);
|
|
x = operand[0] - 1;
|
|
if(x > xmax)
|
|
x = xmax;
|
|
break;
|
|
|
|
/*
|
|
* H and f - cursor motion. operand[0] is row and
|
|
* operand[1] is column, origin 1.
|
|
*/
|
|
case 'H':
|
|
case 'f':
|
|
fixops(operand+1);
|
|
x = operand[1] - 1;
|
|
if(x > xmax)
|
|
x = xmax;
|
|
|
|
/* fallthrough */
|
|
|
|
/*
|
|
* d - cursor to line n (xterm)
|
|
*/
|
|
case 'd':
|
|
fixops(operand);
|
|
y = operand[0] - 1;
|
|
if(originrelative){
|
|
y += yscrmin;
|
|
if(y > yscrmax)
|
|
y = yscrmax;
|
|
}else{
|
|
if(y > ymax)
|
|
y = ymax;
|
|
}
|
|
break;
|
|
|
|
/*
|
|
* J - clear some or all of the display.
|
|
*/
|
|
case 'J':
|
|
switch (operand[0]) {
|
|
/*
|
|
* operand 2: whole screen.
|
|
*/
|
|
case 2:
|
|
clear(0, 0, xmax+1, ymax+1);
|
|
break;
|
|
/*
|
|
* operand 1: start of screen to active position, inclusive.
|
|
*/
|
|
case 1:
|
|
clear(0, 0, xmax+1, y);
|
|
clear(0, y, x+1, y+1);
|
|
break;
|
|
/*
|
|
* Default: active position to end of screen, inclusive.
|
|
*/
|
|
default:
|
|
clear(x, y, xmax+1, y+1);
|
|
clear(0, y+1, xmax+1, ymax+1);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
/*
|
|
* K - clear some or all of the line.
|
|
*/
|
|
case 'K':
|
|
switch (operand[0]) {
|
|
/*
|
|
* operand 2: whole line.
|
|
*/
|
|
case 2:
|
|
clear(0, y, xmax+1, y+1);
|
|
break;
|
|
/*
|
|
* operand 1: start of line to active position, inclusive.
|
|
*/
|
|
case 1:
|
|
clear(0, y, x+1, y+1);
|
|
break;
|
|
/*
|
|
* Default: active position to end of line, inclusive.
|
|
*/
|
|
default:
|
|
clear(x, y, xmax+1, y+1);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
/*
|
|
* P - delete character(s) from right of cursor (xterm)
|
|
*/
|
|
case 'P':
|
|
fixops(operand);
|
|
i = x + operand[0];
|
|
shift(x, y, i, xmax+1 - i);
|
|
clear(xmax-operand[0], y, xmax+1, y+1);
|
|
break;
|
|
|
|
/*
|
|
* @ - insert blank(s) to right of cursor (xterm)
|
|
*/
|
|
case '@':
|
|
fixops(operand);
|
|
i = x + operand[0];
|
|
shift(i, y, x, xmax+1 - i);
|
|
clear(x, y, i, y+1);
|
|
break;
|
|
|
|
|
|
/*
|
|
* X - erase character(s) at cursor and to the right (xterm)
|
|
*/
|
|
case 'X':
|
|
fixops(operand);
|
|
i = x + operand[0];
|
|
clear(x, y, i, y+1);
|
|
break;
|
|
|
|
/*
|
|
* L - insert a line at cursor position (VT102 and later)
|
|
*/
|
|
case 'L':
|
|
fixops(operand);
|
|
for(i = 0; i < operand[0]; ++i)
|
|
scroll(y, yscrmax, y+1, y);
|
|
break;
|
|
|
|
/*
|
|
* M - delete a line at cursor position (VT102 and later)
|
|
*/
|
|
case 'M':
|
|
fixops(operand);
|
|
for(i = 0; i < operand[0]; ++i)
|
|
scroll(y+1, yscrmax+1, y, yscrmax);
|
|
break;
|
|
|
|
/*
|
|
* S,T - scroll up/down (xterm)
|
|
*/
|
|
case 'T':
|
|
fixops(operand);
|
|
for(i = 0; i < operand[0]; ++i)
|
|
scroll(yscrmin, yscrmax, yscrmin+1, yscrmin);
|
|
break;
|
|
|
|
case 'S':
|
|
fixops(operand);
|
|
for(i = 0; i < operand[0]; ++i)
|
|
scroll(yscrmin+1, yscrmax+1, yscrmin, yscrmin);
|
|
break;
|
|
|
|
case '=': /* ? not supported through VT220 */
|
|
number(buf, nil);
|
|
switch(buf[0]) {
|
|
case 'h':
|
|
case 'l':
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
/*
|
|
* Collapse multiple '\033' to one.
|
|
*/
|
|
case '\033':
|
|
peekc = '\033';
|
|
break;
|
|
|
|
/* OSC escape */
|
|
case ']':
|
|
osc();
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default: /* ordinary char */
|
|
Default:
|
|
if(isgraphics && buf[0] < nelem(gmap) && gmap[buf[0]])
|
|
buf[0] = gmap[buf[0]];
|
|
|
|
/* line wrap */
|
|
if (x > xmax){
|
|
if(wraparound){
|
|
newline();
|
|
x = 0;
|
|
}else{
|
|
continue;
|
|
}
|
|
}
|
|
n = 1;
|
|
c = 0;
|
|
while (!cs->raw && host_avail() && x+n<=xmax && n<BUFS
|
|
&& (c = get_next_char())>=' ' && c<'\177') {
|
|
buf[n++] = c;
|
|
c = 0;
|
|
}
|
|
buf[n] = 0;
|
|
drawstring(buf, n);
|
|
x += n;
|
|
peekc = c;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
setattr(int argc, int *argv)
|
|
{
|
|
int i;
|
|
|
|
for(i=0; i<argc; i++) {
|
|
switch(argv[i]) {
|
|
case 0:
|
|
attr = defattr;
|
|
break;
|
|
case 1:
|
|
attr |= THighIntensity;
|
|
break;
|
|
case 4:
|
|
attr |= TUnderline;
|
|
break;
|
|
case 5:
|
|
attr |= TBlink;
|
|
break;
|
|
case 7:
|
|
attr |= TReverse;
|
|
break;
|
|
case 8:
|
|
attr |= TInvisible;
|
|
break;
|
|
case 22:
|
|
attr &= ~THighIntensity;
|
|
break;
|
|
case 24:
|
|
attr &= ~TUnderline;
|
|
break;
|
|
case 25:
|
|
attr &= ~TBlink;
|
|
break;
|
|
case 27:
|
|
attr &= ~TReverse;
|
|
break;
|
|
case 28:
|
|
attr &= ~TInvisible;
|
|
break;
|
|
case 30: /* black */
|
|
case 31: /* red */
|
|
case 32: /* green */
|
|
case 33: /* brown */
|
|
case 34: /* blue */
|
|
case 35: /* purple */
|
|
case 36: /* cyan */
|
|
case 37: /* white */
|
|
attr = (attr & ~0xF000) | 0x1000 | (argv[i]-30)<<13;
|
|
break;
|
|
case 39: /* default */
|
|
attr &= ~0xF000;
|
|
break;
|
|
case 40: /* black */
|
|
case 41: /* red */
|
|
case 42: /* green */
|
|
case 43: /* brown */
|
|
case 44: /* blue */
|
|
case 45: /* purple */
|
|
case 46: /* cyan */
|
|
case 47: /* white */
|
|
attr = (attr & ~0x0F00) | 0x0100 | (argv[i]-40)<<9;
|
|
break;
|
|
case 49: /* default */
|
|
attr &= ~0x0F00;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// handle ESC], Operating System Command
|
|
static void
|
|
osc(void)
|
|
{
|
|
Rune ch, buf[BUFS+1];
|
|
int fd, osc, got, i;
|
|
osc = number(&ch, &got);
|
|
|
|
if(got) {
|
|
switch(osc) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
// set title
|
|
i = 0;
|
|
|
|
while((ch = get_next_char()) != '\a') {
|
|
if(i < nelem(buf) - 1) {
|
|
buf[i++] = ch;
|
|
}
|
|
}
|
|
buf[i] = 0;
|
|
if((fd = open("/dev/label", OWRITE)) >= 0) {
|
|
fprint(fd, "%S", buf);
|
|
close(fd);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|