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//
// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//
// Based on http://antony.lesuisse.org/software/ajaxterm/
// Public Domain License
//
gogo = { };
gogo.Terminal_ctor = function(div, width, height) {
var ie = (window.ActiveXObject) ? 0 : 1;
var query0 = "w=" + width + "&h=" + height;
var query1 = query0 + "&k=";
var buf = "";
var timeout;
var error_timeout;
var keybuf = [];
var sending = 0;
var rmax = 1;
var force = 1;
var dstat = document.createElement('pre');
var sled = document.createElement('span');
var sdebug = document.createElement('span');
var dterm = document.createElement('div');
function debug(s) {
sdebug.innerHTML = s;
}
function error() {
sled.className = 'off';
debug("Connection lost timeout ts:" + ((new Date).getTime()));
}
function update() {
if (sending == 0) {
sending = 1;
sled.className = 'on';
var r = new XMLHttpRequest();
var send = "";
while (keybuf.length > 0) {
send += keybuf.pop();
}
var query = query1 + send;
if (force) {
query = query + "&f=1";
force = 0;
}
r.open("POST", "gogo", true);
r.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
r.onreadystatechange = function () {
if (r.readyState == 4) {
if (r.status == 200) {
window.clearTimeout(error_timeout);
if (r.responseText.length > 0) {
dterm.innerHTML = r.responseText;
rmax = 100;
} else {
rmax *= 2;
if (rmax > 2000)
rmax = 2000;
}
sending=0;
sled.className = 'off';
timeout = window.setTimeout(update, rmax);
} else {
debug("Connection error status:" + r.status);
}
}
}
error_timeout = window.setTimeout(error, 5000);
r.send(query);
}
}
function queue(s) {
keybuf.unshift(s);
if (sending == 0) {
window.clearTimeout(timeout);
timeout = window.setTimeout(update, 1);
}
}
function keypress(ev) {
// Translate to standard keycodes
if (!ev)
ev = window.event;
var kc;
if (ev.keyCode)
kc = ev.keyCode;
if (ev.which)
kc = ev.which;
if (ev.ctrlKey) {
if (kc >= 0 && kc <= 32)
kc = kc;
else if (kc >= 65 && kc <= 90)
kc -= 64;
else if (kc >= 97 && kc <= 122)
kc -= 96;
else {
switch (kc) {
case 54: kc=30; break; // Ctrl-^
case 109: kc=31; break; // Ctrl-_
case 219: kc=27; break; // Ctrl-[
case 220: kc=28; break; // Ctrl-\
case 221: kc=29; break; // Ctrl-]
default: return true;
}
}
} else if (ev.which == 0) {
switch(kc) {
case 8: break; // Backspace
case 9: break; // Tab
case 27: break; // ESC
case 33: kc = 63276; break; // PgUp
case 34: kc = 63277; break; // PgDn
case 35: kc = 63275; break; // End
case 36: kc = 63273; break; // Home
case 37: kc = 63234; break; // Left
case 38: kc = 63232; break; // Up
case 39: kc = 63235; break; // Right
case 40: kc = 63233; break; // Down
case 45: kc = 63302; break; // Ins
case 46: kc = 63272; break; // Del
case 112: kc = 63236; break; // F1
case 113: kc = 63237; break; // F2
case 114: kc = 63238; break; // F3
case 115: kc = 63239; break; // F4
case 116: kc = 63240; break; // F5
case 117: kc = 63241; break; // F6
case 118: kc = 63242; break; // F7
case 119: kc = 63243; break; // F8
case 120: kc = 63244; break; // F9
case 121: kc = 63245; break; // F10
case 122: kc = 63246; break; // F11
case 123: kc = 63247; break; // F12
default: return true;
}
}
if (kc == 8)
kc = 127;
var k = "";
// Build character
switch (kc) {
case 126: k = "~~"; break;
case 63232: k = "~A"; break; // Up
case 63233: k = "~B"; break; // Down
case 63234: k = "~D"; break; // Left
case 63235: k = "~C"; break; // Right
case 63276: k = "~1"; break; // PgUp
case 63277: k = "~2"; break; // PgDn
case 63273: k = "~H"; break; // Home
case 63275: k = "~F"; break; // End
case 63302: k = "~3"; break; // Ins
case 63272: k = "~4"; break; // Del
case 63236: k = "~a"; break; // F1
case 63237: k = "~b"; break; // F2
case 63238: k = "~c"; break; // F3
case 63239: k = "~d"; break; // F4
case 63240: k = "~e"; break; // F5
case 63241: k = "~f"; break; // F6
case 63242: k = "~g"; break; // F7
case 63243: k = "~h"; break; // F8
case 63244: k = "~i"; break; // F9
case 63245: k = "~j"; break; // F10
case 63246: k = "~k"; break; // F11
case 63247: k = "~l"; break; // F12
default: k = String.fromCharCode(kc); break;
}
queue(encodeURIComponent(k));
ev.cancelBubble = true;
if (ev.stopPropagation) ev.stopPropagation();
if (ev.preventDefault) ev.preventDefault();
return true;
}
function keydown(ev) {
if (!ev)
ev = window.event;
if (ie) {
o = { 9:1, 8:1, 27:1, 33:1, 34:1, 35:1, 36:1, 37:1, 38:1, 39:1, 40:1, 45:1, 46:1, 112:1,
113:1, 114:1, 115:1, 116:1, 117:1, 118:1, 119:1, 120:1, 121:1, 122:1, 123:1 };
if (o[ev.keyCode] || ev.ctrlKey || ev.altKey) {
ev.which = 0;
return keypress(ev);
}
}
}
function init() {
if (typeof(XMLHttpRequest) == "undefined") {
XMLHttpRequest = function() {
try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); }
catch(e) {}
try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); }
catch(e) {}
try { return new ActiveXObject("Msxml2.XMLHTTP"); }
catch(e) {}
try { return new ActiveXObject("Microsoft.XMLHTTP"); }
catch(e) {}
throw new Error("This browser does not support XMLHttpRequest.");
};
}
sled.appendChild(document.createTextNode('\xb7'));
sled.className = 'off';
dstat.appendChild(sled);
dstat.appendChild(document.createTextNode(' '));
dstat.appendChild(sdebug);
dstat.className = 'stat';
div.appendChild(dstat);
var d = document.createElement('div');
d.appendChild(dterm);
div.appendChild(d);
document.onkeypress = keypress;
document.onkeydown = keydown;
timeout = window.setTimeout(update, 100);
}
init();
}
gogo.Terminal = function(div, width, height) {
return new this.Terminal_ctor(div, width, height);
}
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