| Program | +Language | +Multiprocess | +Daemonize | +SSL/wss | +Flash Policy Server | +Session Record | +Web Server | +Program Wrap | +
|---|---|---|---|---|---|---|---|---|
| websockify | +python | +yes | +yes | +yes 1 | +yes | +yes | +yes | +yes | +
| other/websockify | +C | +yes | +yes | +yes | +yes | +no | +no | +no | +
| other/websockify.js | +Node (node.js) | +yes | +no | +no | +no | +no | +no | +no | +
+The `--wrap-mode` option can be used to indicate what action to take
+when the wrapped program exits or daemonizes.
-See more screenshots here.
+Here is an example of using websockify to wrap the vncserver command
+(which backgrounds itself) for use with
+[noVNC](https://github.com/kanaka/noVNC):
+ `./websockify 5901 --wrap-mode=ignore -- vncserver -geometry 1024x768 :1`
-### Projects/Companies using noVNC
+Here is an example of wrapping telnetd (from krb5-telnetd).telnetd
+exits after the connection closes so the wrap mode is set to respawn
+the command:
-* [Sentry Data Systems](http://www.sentryds.com): uses noVNC in the
- [Datanex Cloud Computing Platform](http://www.sentryds.com/products/datanex/).
+ `sudo ./websockify 2023 --wrap-mode=respawn -- telnetd -debug 2023`
-* [Ganeti Web Manager](http://code.osuosl.org/projects/ganeti-webmgr):
- Feature [#1935](http://code.osuosl.org/issues/1935).
+The `wstelnet.html` page demonstrates a simple WebSockets based telnet
+client.
-* [Archipel](http://archipelproject.org):
- [Video demo](http://antoinemercadal.fr/archipelblog/wp-content/themes/ArchipelWPTemplate/video_youtube.php?title=VNC%20Demonstration&id=te_bzW574Zo)
-* [openQRM](http://www.openqrm.com/): VNC plugin available
- by request. Probably included in [version
- 4.8](http://www.openqrm.com/?q=node/15). [Video
- demo](http://www.openqrm-enterprise.com/news/details/article/remote-vm-console-plugin-available.html).
+### Building the Python ssl module (for python 2.5 and older)
+* Install the build dependencies. On Ubuntu use this command:
-### Browser Requirements
+ `sudo aptitude install python-dev bluetooth-dev`
-* HTML5 Canvas: Except for Internet Explorer, most
- browsers have had Canvas support for quite some time. Internet
- Explorer 9 will have Canvas support (finally).
+* Download, build the ssl module and symlink to it:
-* HTML5 WebSockets: For browsers that do not have builtin
- WebSockets support, the project includes
- web-socket-js,
- a WebSockets emulator using Adobe Flash.
+ `cd websockify/`
-* Fast Javascript Engine: noVNC avoids using new Javascript
- functionality so it will run on older browsers, but decode and
- rendering happen in Javascript, so a slow Javascript engine will
- mean noVNC is painfully slow.
+ `wget http://pypi.python.org/packages/source/s/ssl/ssl-1.15.tar.gz`
-* I maintain a more detailed list of browser compatibility here.
+ `tar xvzf ssl-1.15.tar.gz`
+ `cd ssl-1.15`
-### Server Requirements
+ `make`
-Unless you are using a VNC server with support for WebSockets
-connections (only my [fork of libvncserver](http://github.com/kanaka/libvncserver)
-currently), you need to use a WebSockets to TCP socket proxy. There is
-a python proxy included ('wsproxy'). One advantage of using the proxy
-is that it has builtin support for SSL/TLS encryption (i.e. "wss://").
+ `cd ../`
-There a few reasons why a proxy is required:
+ `ln -sf ssl-1.15/build/lib.linux-*/ssl ssl`
- 1. WebSockets is not a pure socket protocol. There is an initial HTTP
- like handshake to allow easy hand-off by web servers and allow
- some origin policy exchange. Also, each WebSockets frame begins
- with 0 ('\x00') and ends with 255 ('\xff').
-
- 2. Javascript itself does not have the ability to handle pure byte
- arrays. The python proxy encodes the data as base64 so that the
- Javascript client can decode the data as an integer array.
-
-
-### Quick Start
-
-* Use the launch script to start a mini-webserver and the WebSockets
- proxy. The `--vnc` option is used to specify the location of
- a running VNC server:
-
- `./utils/launch.sh --vnc localhost:5901`
-
-* Point your browser to the cut-and-paste URL that is output by the
- launch script. Enter a password if the VNC server has one
- configured. Hit the Connect button and enjoy!
-
-
-### Advanced usage
-
-* To encrypt the traffic using the WebSocket 'wss://' URI scheme you
- need to generate a certificate for the proxy to load. By default the
- proxy loads a certificate file name `self.pem` but the `--cert=CERT`
- option can override the file name. You can generate a self-signed
- certificate using openssl. When asked for the common name, use the
- hostname of the server where the proxy will be running:
-
- `openssl req -new -x509 -days 365 -nodes -out self.pem -keyout self.pem`
-
-* `tightvnc` provide a nice startup script that can be used to run
- a separate X desktop that is served by VNC. To install and run the
- server under Ubuntu you would do something like this:
-
- `sudo apt-get install tightvncserver`
-
- `vncserver :1`
-
- The VNC server will run in the background. The port that it runs
- on is the display number + 5900 (i.e. 5901 in the case above).
-
-* `x11vnc` can be used to share your current X desktop. Note that if
- you run noVNC on the X desktop you are connecting to via VNC you
- will get a neat hall of mirrors effect, but the the client and
- server will fight over the mouse.
-
- `sudo apt-get install x11vnc`
-
- `x11vnc -forever -display :0`
-
- Without the `-forever` option, x11vnc will exit after the first
- disconnect. The `-display` option indicates the exiting X display to
- share. The port that it runs on is the display number + 5900 (i.e.
- 5900 in the case above).
-
-* To run the python proxy directly without using launch script (to
- pass additional options for example):
-
- `./utils/wsproxy.py source_port target_addr:target_port`
-
- `./utils/wsproxy.py 8787 localhost:5901`
-
-* To activate the mini-webserver in wsproxy.py use the `--web DIR`
- option:
-
- `./utils/wsproxy.py --web ./ 8787 localhost:5901`
-
-
-* Point your web browser at http://localhost:8787/vnc.html. On the
- page enter the location where the proxy is running (localhost and
- 8787) and the password that the vnc server is using (if any). Hit
- the Connect button.
-
-* If you are using python 2.3 or 2.4 and you want wsproxy to support
- 'wss://' (TLS) then see the
- [wsproxy README](http://github.com/kanaka/noVNC/blob/master/utils/README.md)
- for instructions on building the ssl module.
-
-
-### Integration
-
-The client is designed to be easily integrated with existing web
-structure and style.
-
-At a minimum you must include the `vnc.js` and `ui.js` scripts and
-call UI.load(). For example:
-
-
-
-
-
-
- | Browser | -Status | -Performance/Notes | -
|---|---|---|
| Chrome 7.0.510.0 | -Broken | -WebKit render bug (see note 3) | -
| Chrome 5.0.375.29 | -Excellent | -Very fast. Native WebSockets. | -
| Firefox 4.0 Beta 6 | -Excellent | -Fast. Native WebSockets. SSL cert hassle (see note 2) | -
| Firefox 3.6.1 | -Good | -Slowed by web-socket-js overhead. Local cursor causes segfault. | -
| Arora 0.10.1 | -Fair | -Slow due to broken putImageData and web-socket-js. | -
| Opera 10.60 | -Poor | -web-socket-js problems, mouse/keyboard issues (see note 1) | -
| Konqueror 4.3.2 | -Broken | -web-socket-js never loads | -
| Browser | -Status | -Performance/Notes | -
|---|---|---|
| Chrome 5.0.375.29 | -Excellent | -Very fast. Native WebSockets. | -
| Firefox 3.5 | -Good | -Slowed by web-socket-js overhead. | -
| Firefox 3.0.17 | -Fair | -Works fine but is slow. | -
| Arora 0.5 | -Fair | -Slow due to broken putImageData and web-socket-js. | -
| Opera 10.60 | -Poor | -web-socket-js problems, mouse/keyboard issues (see note 1) | -
| Konqueror 4.2.2 | -Broken | -web-socket-js never loads | -
| Browser | -Status | -Performance/Notes | -
|---|---|---|
| Chrome 5.0.375.99 | -Excellent | -Very fast. Native WebSockets. | -
| Safari 5.0 | -Excellent | -Fast. Native WebSockets. | -
| Firefox 3.0.19 | -Good | -Some overhead from web-socket-js. | -
| IE 6, 7, 8 | -Non-starter | -No basic Canvas support. Javascript painfully slow. | -
...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 = "" + end_tag; + } + if (n_at.mode & VT100.A_STANDOUT) + n_at.mode |= VT100.A_BOLD; + pair = this.html_colours_(n_at); + start_tag += ''; + stuff += start_tag; + end_tag = "" + 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 += '&'; break; + case '<': + stuff += '<'; break; + case '>': + stuff += '>'; break; + case ' ': + //stuff += ' '; break; + stuff += ' '; break; + default: + stuff += ch; + } + } + if (!added_end_tag) + stuff += end_tag; + } + this.scr_.innerHTML = "" + stuff + "\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