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websockify/include/VT100.js

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// VT100.js -- a text terminal emulator in JavaScript with a ncurses-like
// interface and a POSIX-like interface. (The POSIX-like calls are
// implemented on top of the ncurses-like calls, not the other way round.)
//
// Released under the GNU LGPL v2.1, by Frank Bi <bi@zompower.tk>
//
// 2007-08-12 - refresh():
// - factor out colour code to html_colours_()
// - fix handling of A_REVERSE | A_DIM
// - simplify initial <br /> output code
// - fix underlining colour
// - fix attron() not to turn off attributes
// - decouple A_STANDOUT and A_BOLD
// 2007-08-11 - getch() now calls refresh()
// 2007-08-06 - Safari compat fix -- turn '\r' into '\n' for onkeypress
// 2007-08-05 - Opera compat fixes for onkeypress
// 2007-07-30 - IE compat fixes:
// - change key handling code
// - add <br />...<br />&nbsp; so that 1st and last lines align
// 2007-07-28 - change wrapping behaviour -- writing at the right edge no
// longer causes the cursor to immediately wrap around
// - add <b>...</b> to output to make A_STANDOUT stand out more
// - add handling of backspace, tab, return keys
// - fix doc. of VT100() constructor
// - change from GPL to LGPL
// 2007-07-09 - initial release
//
// class VT100
// A_NORMAL, A_UNDERLINE, A_REVERSE, A_BLINK, A_DIM, A_BOLD, A_STANDOUT
// =class constants=
// Attribute constants.
// VT100(wd, ht, scr_id) =constructor=
// Creates a virtual terminal with width `wd', and
// height `ht'. The terminal will be displayed between
// <pre>...</pre> tags which have element ID `scr_id'.
// addch(ch [, attr])
// Writes out the character `ch'. If `attr' is given,
// it specifies the attributes for the character,
// otherwise the current attributes are used.
// addstr(stuff) Writes out the string `stuff' using the current
// attributes.
// attroff(mode) Turns off any current options given in mode.
// attron(mode) Turns on any options given in mode.
// attrset(mode) Sets the current options to mode.
// bkgdset(attr) Sets the background attributes to attr.
// clear() Clears the terminal using the background attributes,
// and homes the cursor.
// clrtobol() Clears the portion of the terminal from the cursor
// to the bottom.
// clrtoeol() Clears the portion of the current line after the
// cursor.
// curs_set(vis [, grab])
// If `vis' is 0, makes the cursor invisible; otherwise
// make it visible. If `grab' is given and true, starts
// capturing keyboard events (for `getch()'); if given
// and false, stops capturing events.
// echo() Causes key strokes to be automatically echoed on the
// terminal.
// erase() Same as `clear()'.
// getch(isr) Arranges to call `isr' when a key stroke is
// received. The received character and the terminal
// object are passed as arguments to `isr'.
// getmaxyx() Returns an associative array with the maximum row
// (`y') and column (`x') numbers for the terminal.
// getyx() Returns an associative array with the current row
// (`y') and column (`x') of the cursor.
// move(r, c) Moves the cursor to row `r', column `c'.
// noecho() Stops automatically echoing key strokes.
// refresh() Updates the display.
// scroll() Scrolls the terminal up one line.
// standend() Same as `attrset(VT100.A_NORMAL)'.
// standout() Same as `attron(VT100.A_STANDOUT)'.
// write(stuff) Writes `stuff' to the terminal and immediately
// updates the display; (some) escape sequences are
// interpreted and acted on.
// constructor
function VT100(wd, ht, scr_id)
{
var r;
var c;
var scr = document.getElementById(scr_id);
this.wd_ = wd;
this.ht_ = ht;
this.scrolled_ = 0;
this.bkgd_ = {
mode: VT100.A_NORMAL,
fg: VT100.COLOR_WHITE,
bg: VT100.COLOR_BLACK
};
this.c_attr_ = {
mode: VT100.A_NORMAL,
fg: VT100.COLOR_WHITE,
bg: VT100.COLOR_BLACK
};
this.text_ = new Array(ht);
this.attr_ = new Array(ht);
for (r = 0; r < ht; ++r) {
this.text_[r] = new Array(wd);
this.attr_[r] = new Array(wd);
}
this.scr_ = scr;
this.cursor_vis_ = true;
this.grab_events_ = false;
this.getch_isr_ = undefined;
this.key_buf_ = [];
this.echo_ = true;
this.esc_state_ = 0;
// Internal debug setting.
this.debug_ = 0;
this.clear();
this.refresh();
}
// public constants -- colours and colour pairs
VT100.COLOR_BLACK = 0;
VT100.COLOR_BLUE = 1;
VT100.COLOR_GREEN = 2;
VT100.COLOR_CYAN = 3;
VT100.COLOR_RED = 4;
VT100.COLOR_MAGENTA = 5;
VT100.COLOR_YELLOW = 6;
VT100.COLOR_WHITE = 7;
VT100.COLOR_PAIRS = 256;
VT100.COLORS = 8;
// public constants -- attributes
VT100.A_NORMAL = 0;
VT100.A_UNDERLINE = 1;
VT100.A_REVERSE = 2;
VT100.A_BLINK = 4;
VT100.A_DIM = 8;
VT100.A_BOLD = 16;
VT100.A_STANDOUT = 32;
VT100.A_PROTECT = VT100.A_INVIS = 0; // ?
// other public constants
VT100.TABSIZE = 8;
// private constants
VT100.ATTR_FLAGS_ = VT100.A_UNDERLINE | VT100.A_REVERSE | VT100.A_BLINK |
VT100.A_DIM | VT100.A_BOLD | VT100.A_STANDOUT |
VT100.A_PROTECT | VT100.A_INVIS;
VT100.COLOR_SHIFT_ = 6;
VT100.browser_ie_ = (navigator.appName.indexOf("Microsoft") != -1);
VT100.browser_opera_ = (navigator.appName.indexOf("Opera") != -1);
// class variables
VT100.the_vt_ = undefined;
// class methods
// this is actually an event handler
VT100.handle_onkeypress_ = function VT100_handle_onkeypress(event)
{
var vt = VT100.the_vt_, ch;
if (vt === undefined)
return true;
if (VT100.browser_ie_ || VT100.browser_opera_) {
ch = event.keyCode;
if (ch == 13)
ch = 10;
else if (ch > 255 || (ch < 32 && ch != 8))
return true;
ch = String.fromCharCode(ch);
} else {
ch = event.charCode;
//dump("ch: " + ch + "\n");
//dump("ctrl?: " + event.ctrlKey + "\n");
vt.debug("onkeypress:: keyCode: " + event.keyCode + ", ch: " + event.charCode);
if (ch) {
if (ch > 255)
return true;
if (event.ctrlKey && event.shiftKey) {
// Don't send the copy/paste commands.
var charStr = String.fromCharCode(ch);
if (charStr == 'C' || charStr == 'V') {
return false;
}
}
if (event.ctrlKey) {
ch = String.fromCharCode(ch - 96);
} else {
ch = String.fromCharCode(ch);
if (ch == '\r')
ch = '\n';
}
} else {
switch (event.keyCode) {
case event.DOM_VK_BACK_SPACE:
ch = '\b';
break;
case event.DOM_VK_TAB:
ch = '\t';
// Stop tab from moving to another element.
event.preventDefault();
break;
case event.DOM_VK_RETURN:
case event.DOM_VK_ENTER:
ch = '\n';
break;
case event.DOM_VK_UP:
ch = '\x1b[A';
break;
case event.DOM_VK_DOWN:
ch = '\x1b[B';
break;
case event.DOM_VK_RIGHT:
ch = '\x1b[C';
break;
case event.DOM_VK_LEFT:
ch = '\x1b[D';
break;
case event.DOM_VK_DELETE:
ch = '\x1b[3~';
break;
case event.DOM_VK_HOME:
ch = '\x1b[H';
break;
case event.DOM_VK_ESCAPE:
ch = '\x1bc';
break;
default:
return true;
}
}
}
vt.key_buf_.push(ch);
setTimeout(VT100.go_getch_, 0);
return false;
}
// this is actually an event handler
VT100.handle_onkeydown_ = function VT100_handle_onkeydown()
{
var vt = VT100.the_vt_, ch;
switch (event.keyCode) {
case 8:
ch = '\b'; break;
default:
return true;
}
vt.key_buf_.push(ch);
setTimeout(VT100.go_getch_, 0);
return false;
}
VT100.go_getch_ = function VT100_go_getch()
{
var vt = VT100.the_vt_;
if (vt === undefined)
return;
var isr = vt.getch_isr_;
vt.getch_isr_ = undefined;
if (isr === undefined)
return;
var ch = vt.key_buf_.shift();
if (ch === undefined) {
vt.getch_isr_ = isr;
return;
}
if (vt.echo_)
vt.addch(ch);
isr(ch, vt);
}
// object methods
VT100.prototype.may_scroll_ = function()
{
var ht = this.ht_, cr = this.row_;
while (cr >= ht) {
this.scroll();
--cr;
}
this.row_ = cr;
}
VT100.prototype.html_colours_ = function(attr)
{
var fg, bg, co0, co1;
fg = attr.fg;
bg = attr.bg;
switch (attr.mode & (VT100.A_REVERSE | VT100.A_DIM | VT100.A_BOLD)) {
case 0:
case VT100.A_DIM | VT100.A_BOLD:
co0 = '00'; co1 = 'c0';
break;
case VT100.A_BOLD:
co0 = '00'; co1 = 'ff';
break;
case VT100.A_DIM:
if (fg == VT100.COLOR_BLACK)
co0 = '40';
else
co0 = '00';
co1 = '40';
break;
case VT100.A_REVERSE:
case VT100.A_REVERSE | VT100.A_DIM | VT100.A_BOLD:
co0 = 'c0'; co1 = '40';
break;
case VT100.A_REVERSE | VT100.A_BOLD:
co0 = 'c0'; co1 = '00';
break;
default:
if (fg == VT100.COLOR_BLACK)
co0 = '80';
else
co0 = 'c0';
co1 = 'c0';
}
return {
f: '#' + (fg & 4 ? co1 : co0) +
(fg & 2 ? co1 : co0) +
(fg & 1 ? co1 : co0),
b: '#' + (bg & 4 ? co1 : co0) +
(bg & 2 ? co1 : co0) +
(bg & 1 ? co1 : co0)
};
}
VT100.prototype.addch = function(ch, attr)
{
var cc = this.col_;
this.debug("addch:: ch: " + ch + ", attr: " + attr);
switch (ch) {
case '\b':
if (cc != 0)
--cc;
break;
case '\n':
++this.row_;
cc = 0;
this.clrtoeol();
this.may_scroll_();
break;
case '\r':
this.may_scroll_();
cc = 0;
break;
case '\t':
this.may_scroll_();
cc += VT100.TABSIZE - cc % VT100.TABSIZE;
if (cc >= this.wd_) {
++this.row_;
cc -= this.wd_;
}
break;
default:
if (attr === undefined)
attr = this._cloneAttr(this.c_attr_);
if (cc >= this.wd_) {
++this.row_;
cc = 0;
}
this.may_scroll_();
this.text_[this.row_][cc] = ch;
this.attr_[this.row_][cc] = attr;
++cc;
}
this.col_ = cc;
}
VT100.prototype.addstr = function(stuff)
{
for (var i = 0; i < stuff.length; ++i)
this.addch(stuff.charAt(i));
}
VT100.prototype._cloneAttr = function VT100_cloneAttr(a)
{
return {
mode: a.mode,
fg: a.fg,
bg: a.bg
};
}
VT100.prototype.attroff = function(a)
{
//dump("attroff: " + a + "\n");
a &= VT100.ATTR_FLAGS_;
this.c_attr_.mode &= ~a;
}
VT100.prototype.attron = function(a)
{
//dump("attron: " + a + "\n");
a &= VT100.ATTR_FLAGS_;
this.c_attr_.mode |= a;
}
VT100.prototype.attrset = function(a)
{
//dump("attrset: " + a + "\n");
this.c_attr_.mode = a;
}
VT100.prototype.fgset = function(fg)
{
//dump("fgset: " + fg + "\n");
this.c_attr_.fg = fg;
}
VT100.prototype.bgset = function(bg)
{
//dump("bgset: " + bg + "\n");
if (bg !== 0) {
this.warn("bgset: " + bg + "\n");
}
this.c_attr_.bg = bg;
}
VT100.prototype.bkgdset = function(a)
{
this.bkgd_ = a;
}
VT100.prototype.clear = function()
{
this.debug("clear");
this.row_ = this.col_ = 0;
this.scrolled_ = 0;
for (r = 0; r < this.ht_; ++r) {
for (c = 0; c < this.wd_; ++c) {
this.text_[r][c] = ' ';
this.attr_[r][c] = this._cloneAttr(this.bkgd_);
}
}
}
VT100.prototype.clrtobot = function()
{
this.debug("clrtobot, row: " + this.row_);
var ht = this.ht_;
var wd = this.wd_;
this.clrtoeol();
for (var r = this.row_ + 1; r < ht; ++r) {
for (var c = 0; c < wd; ++c) {
this.text_[r][c] = ' ';
this.attr_[r][c] = this.bkgd_;
}
}
}
VT100.prototype.clrtoeol = function()
{
this.debug("clrtoeol, col: " + this.col_);
var r = this.row_;
if (r >= this.ht_)
return;
for (var c = this.col_; c < this.wd_; ++c) {
this.text_[r][c] = ' ';
this.attr_[r][c] = this.bkgd_;
}
}
VT100.prototype.clearpos = function(row, col)
{
this.debug("clearpos (" + row + ", " + col + ")");
if (row < 0 || row >= this.ht_)
return;
if (col < 0 || col >= this.wd_)
return;
this.text_[row][col] = ' ';
this.attr_[row][col] = this.bkgd_;
}
VT100.prototype.curs_set = function(vis, grab, eventist)
{
this.debug("curs_set:: vis: " + vis + ", grab: " + grab);
if (vis !== undefined)
this.cursor_vis_ = (vis > 0);
if (eventist === undefined)
eventist = window;
if (grab === true || grab === false) {
if (grab === this.grab_events_)
return;
if (grab) {
this.grab_events_ = true;
VT100.the_vt_ = this;
eventist.addEventListener("keypress", VT100.handle_onkeypress_, false);
if (VT100.browser_ie_)
document.onkeydown = VT100.handle_onkeydown_;
} else {
eventist.removeEventListener("keypress", VT100.handle_onkeypress_, false);
if (VT100.browser_ie_)
document.onkeydown = VT100.handle_onkeydown_;
this.grab_events_ = false;
VT100.the_vt_ = undefined;
}
}
}
VT100.prototype.echo = function()
{
this.debug("echo on");
this.echo_ = true;
}
VT100.prototype.erase = VT100.prototype.clear;
VT100.prototype.getch = function(isr)
{
this.debug("getch");
this.refresh();
this.getch_isr_ = isr;
setTimeout(VT100.go_getch_, 0);
}
VT100.prototype.getmaxyx = function()
{
return { y: this.ht_ - 1, x: this.wd_ - 1 };
}
VT100.prototype.getyx = function()
{
return { y: this.row_, x: this.col_ };
}
VT100.prototype.move = function(r, c)
{
this.debug("move: (" + r + ", " + c + ")");
if (r < 0)
r = 0;
else if (r >= this.ht_)
r = this.ht_ - 1;
if (c < 0)
c = 0;
else if (c >= this.wd_)
c = this.wd_ - 1;
this.row_ = r;
this.col_ = c;
}
VT100.prototype.noecho = function()
{
this.debug("echo off");
this.echo_ = false;
}
VT100.prototype.refresh = function()
{
this.debug("refresh");
var r, c, stuff = "", start_tag = "", end_tag = "", at = -1, n_at, ch,
pair, cr, cc, ht, wd, cv, added_end_tag;
ht = this.ht_;
wd = this.wd_;
cr = this.row_;
cc = this.col_;
cv = this.cursor_vis_;
var innerHTML = this.scr_.innerHTML;
if (cc >= wd)
cc = wd - 1;
for (r = 0; r < ht; ++r) {
if (r > 0) {
stuff += '\n';
}
for (c = 0; c < wd; ++c) {
added_end_tag = false;
n_at = this.attr_[r][c];
if (cv && r == cr && c == cc) {
// Draw the cursor here.
n_at = this._cloneAttr(n_at);
n_at.mode ^= VT100.A_REVERSE;
}
// If the attributes changed, make a new span.
if (n_at.mode != at.mode || n_at.fg != at.fg || n_at.bg != at.bg) {
if (c > 0) {
stuff += end_tag;
}
start_tag = "";
end_tag = "";
if (n_at.mode & VT100.A_BLINK) {
start_tag = "<blink>";
end_tag = "</blink>" + end_tag;
}
if (n_at.mode & VT100.A_STANDOUT)
n_at.mode |= VT100.A_BOLD;
pair = this.html_colours_(n_at);
start_tag += '<span style="color:' + pair.f +
';background-color:' + pair.b;
if (n_at.mode & VT100.A_UNDERLINE)
start_tag += ';text-decoration:underline';
start_tag += ';">';
stuff += start_tag;
end_tag = "</span>" + end_tag;
at = n_at;
added_end_tag = true;
} else if (c == 0) {
stuff += start_tag;
}
ch = this.text_[r][c];
switch (ch) {
case '&':
stuff += '&amp;'; break;
case '<':
stuff += '&lt;'; break;
case '>':
stuff += '&gt;'; break;
case ' ':
//stuff += '&nbsp;'; break;
stuff += ' '; break;
default:
stuff += ch;
}
}
if (!added_end_tag)
stuff += end_tag;
}
this.scr_.innerHTML = "<b>" + stuff + "</b>\n";
}
VT100.prototype.scroll = function()
{
this.scrolled_ += 1;
this.debug("scrolled: " + this.scrolled_);
var n_text = this.text_[0], n_attr = this.attr_[0],
ht = this.ht_, wd = this.wd_;
for (var r = 1; r < ht; ++r) {
this.text_[r - 1] = this.text_[r];
this.attr_[r - 1] = this.attr_[r];
}
this.text_[ht - 1] = n_text;
this.attr_[ht - 1] = n_attr;
for (var c = 0; c < wd; ++c) {
n_text[c] = ' ';
n_attr[c] = this.bkgd_;
}
}
VT100.prototype.standend = function()
{
//this.debug("standend");
this.attrset(0);
}
VT100.prototype.standout = function()
{
//this.debug("standout");
this.attron(VT100.A_STANDOUT);
}
VT100.prototype.write = function(stuff)
{
var ch, x, r, c, i, j, yx, myx;
for (i = 0; i < stuff.length; ++i) {
ch = stuff.charAt(i);
if (ch == '\x0D') {
this.debug("write:: ch: " + ch.charCodeAt(0) + ", '\\x0D'");
} else {
this.debug("write:: ch: " + ch.charCodeAt(0) + ", '" + (ch == '\x1b' ? "ESC" : ch) + "'");
}
//dump("ch: " + ch.charCodeAt(0) + ", '" + (ch == '\x1b' ? "ESC" : ch) + "'\n");
switch (ch) {
case '\x00':
case '\x7f':
case '\x07': /* bell, ignore it */
this.debug("write:: ignoring bell character: " + ch);
continue;
case '\a':
case '\b':
case '\t':
case '\r':
this.addch(ch);
continue;
case '\n':
case '\v':
case '\f': // what a mess
yx = this.getyx();
myx = this.getmaxyx();
if (yx.y >= myx.y) {
this.scroll();
this.move(myx.y, 0);
} else
this.move(yx.y + 1, 0);
continue;
case '\x18':
case '\x1a':
this.esc_state_ = 0;
this.debug("write:: set escape state: 0");
continue;
case '\x1b':
this.esc_state_ = 1;
this.debug("write:: set escape state: 1");
continue;
case '\x9b':
this.esc_state_ = 2;
this.debug("write:: set escape state: 2");
continue;
}
// not a recognized control character
switch (this.esc_state_) {
case 0: // not in escape sequence
this.addch(ch);
break;
case 1: // just saw ESC
switch (ch) {
case '[':
this.esc_state_ = 2;
this.debug("write:: set escape state: 2");
break;
case '=':
/* Set keypade mode (ignored) */
this.debug("write:: set keypade mode: ignored");
this.esc_state_ = 0;
break;
case '>':
/* Reset keypade mode (ignored) */
this.debug("write:: reset keypade mode: ignored");
this.esc_state_ = 0;
break;
case 'H':
/* Set tab at cursor column (ignored) */
this.debug("write:: set tab cursor column: ignored");
this.esc_state_ = 0;
break;
}
break;
case 2: // just saw CSI
switch (ch) {
case 'K':
/* Erase in Line */
this.esc_state_ = 0;
this.clrtoeol();
continue;
case 'H':
/* Move to (0,0). */
this.esc_state_ = 0;
this.move(0, 0);
continue;
case 'J':
/* Clear to the bottom. */
this.esc_state_ = 0;
this.clrtobot();
continue;
case '?':
/* Special VT100 mode handling. */
this.esc_state_ = 5;
this.debug("write:: special vt100 mode");
continue;
}
// Drop through to next case.
this.csi_parms_ = [0];
this.debug("write:: set escape state: 3");
this.esc_state_ = 3;
case 3: // saw CSI and parameters
switch (ch) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
x = this.csi_parms_.pop();
this.csi_parms_.push(x * 10 + ch * 1);
this.debug("csi_parms_: " + this.csi_parms_);
continue;
case ';':
if (this.csi_parms_.length < 17)
this.csi_parms_.push(0);
continue;
}
this.esc_state_ = 0;
switch (ch) {
case 'A':
// Cursor Up <ESC>[{COUNT}A
this.move(this.row_ - Math.max(1, this.csi_parms_[0]),
this.col_);
break;
case 'B':
// Cursor Down <ESC>[{COUNT}B
this.move(this.row_ + Math.max(1, this.csi_parms_[0]),
this.col_);
break;
case 'C':
// Cursor Forward <ESC>[{COUNT}C
this.move(this.row_,
this.col_ + Math.max(1, this.csi_parms_[0]));
break;
case 'c':
this.warn("write:: got TERM query");
break;
case 'D':
// Cursor Backward <ESC>[{COUNT}D
this.move(this.row_,
this.col_ - Math.max(1, this.csi_parms_[0]));
break;
case 'f':
case 'H':
// Cursor Home <ESC>[{ROW};{COLUMN}H
this.csi_parms_.push(0);
this.move(this.csi_parms_[0] - 1,
this.csi_parms_[1] - 1);
break;
case 'J':
switch (this.csi_parms_[0]) {
case 0:
this.clrtobot();
break;
case 2:
this.clear();
this.move(0, 0);
}
break;
case 'm':
for (j=0; j<this.csi_parms_.length; ++j) {
x = this.csi_parms_[j];
switch (x) {
case 0:
this.standend();
this.fgset(this.bkgd_.fg);
this.bgset(this.bkgd_.bg);
break;
case 1:
this.attron(VT100.A_BOLD);
break;
case 30:
this.fgset(VT100.COLOR_BLACK);
break;
case 31:
this.fgset(VT100.COLOR_RED);
break;
case 32:
this.fgset(VT100.COLOR_GREEN);
break;
case 33:
this.fgset(VT100.COLOR_YELLOW);
break;
case 34:
this.fgset(VT100.COLOR_BLUE);
break;
case 35:
this.fgset(VT100.COLOR_MAGENTA);
break;
case 36:
this.fgset(VT100.COLOR_CYAN);
break;
case 37:
this.fgset(VT100.COLOR_WHITE);
break;
case 40:
this.bgset(VT100.COLOR_BLACK);
break;
case 41:
this.bgset(VT100.COLOR_RED);
break;
case 42:
this.bgset(VT100.COLOR_GREEN);
break;
case 44:
this.bgset(VT100.COLOR_YELLOW);
break;
case 44:
this.bgset(VT100.COLOR_BLUE);
break;
case 45:
this.bgset(VT100.COLOR_MAGENTA);
break;
case 46:
this.bgset(VT100.COLOR_CYAN);
break;
case 47:
this.bgset(VT100.COLOR_WHITE);
break;
}
}
break;
case 'r':
// 1,24r - set scrolling region (ignored)
break;
case '[':
this.debug("write:: set escape state: 4");
this.esc_state_ = 4;
break;
case 'g':
// 0g: clear tab at cursor (ignored)
// 3g: clear all tabs (ignored)
break;
default:
this.warn("write:: unknown command: " + ch);
this.csi_parms_ = [];
break;
}
break;
case 4: // saw CSI [
this.esc_state_ = 0; // gobble char.
break;
case 5: // Special mode handling, saw <ESC>[?
// Expect a number - the reset type
this.csi_parms_ = [ch];
this.esc_state_ = 6;
break;
case 6: // Reset mode handling, saw <ESC>[?1
// Expect a letter - the mode target, example:
// <ESC>[?1l : cursor key mode = cursor
// <ESC>[?1h : save current screen, create new empty
// screen and position at 0,0
// <ESC>[?5l : White on blk
// XXX: Ignored for now.
//dump("Saw reset mode: <ESC>[?" + this.csi_parms_[0] + ch + "\n");
this.esc_state_ = 0;
this.debug("write:: set escape state: 0");
break;
}
}
this.refresh();
}
VT100.prototype.debug = function(message) {
if (this.debug_) {
dump(message + "\n");
}
}
VT100.prototype.warn = function(message) {
dump(message + "\n");
}
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