ESPTerm - ESP8266 terminal emulator. Branches: [master] patches, [work] next release
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espterm-firmware/html_orig/jssrc/term.js

716 lines
16 KiB

/** Decode two-byte number */
function parse2B(s, i) {
return (s.charCodeAt(i++) - 1) + (s.charCodeAt(i) - 1) * 127;
}
/** Decode three-byte number */
function parse3B(s, i) {
return (s.charCodeAt(i) - 1) + (s.charCodeAt(i+1) - 1) * 127 + (s.charCodeAt(i+2) - 1) * 127 * 127;
}
function Chr(n) {
return String.fromCharCode(n);
}
function encode2B(n) {
var lsb, msb;
lsb = (n % 127);
n = ((n - lsb) / 127);
lsb += 1;
msb = (n + 1);
return Chr(lsb) + Chr(msb);
}
function encode3B(n) {
var lsb, msb, xsb;
lsb = (n % 127);
n = (n - lsb) / 127;
lsb += 1;
msb = (n % 127);
n = (n - msb) / 127;
msb += 1;
xsb = (n + 1);
return Chr(lsb) + Chr(msb) + Chr(xsb);
}
var Screen = (function () {
var W = 0, H = 0; // dimensions
var inited = false;
var cursor = {
a: false, // active (blink state)
x: 0, // 0-based coordinates
y: 0,
fg: 7, // colors 0-15
bg: 0,
attrs: 0,
suppress: false, // do not turn on in blink interval (for safe moving)
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forceOn: false,
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hidden: false, // do not show
hanging: false, // xenl
};
var screen = [];
var blinkIval;
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var cursorFlashStartIval;
var frakturExceptions = {
'C': '\u212d',
'H': '\u210c',
'I': '\u2111',
'R': '\u211c',
'Z': '\u2128',
};
// for BEL
var audioCtx = null;
try {
audioCtx = new (window.AudioContext || window.audioContext || window.webkitAudioContext)();
} catch (er) {
console.error("Browser does not support AudioContext, can't beep.", er);
}
/** Get cell under cursor */
function _curCell() {
return screen[cursor.y*W + cursor.x];
}
/** Safely move cursor */
function cursorSet(y, x) {
// Hide and prevent from showing up during the move
cursor.suppress = true;
_draw(_curCell(), false);
cursor.x = x;
cursor.y = y;
// Show again
cursor.suppress = false;
_draw(_curCell());
}
/** Update cell on display. inv = invert (for cursor) */
function _draw(cell, inv) {
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if (!cell) return;
if (typeof inv == 'undefined') {
inv = cursor.a && cursor.x == cell.x && cursor.y == cell.y;
}
var elem = cell.e, fg, bg, cn, t;
// Colors
fg = inv ? cell.bg : cell.fg;
bg = inv ? cell.fg : cell.bg;
// Update
elem.textContent = t = (cell.t + ' ')[0];
cn = 'fg' + fg + ' bg' + bg;
if (cell.attrs & (1<<0)) cn += ' bold';
if (cell.attrs & (1<<2)) cn += ' italic';
if (cell.attrs & (1<<3)) cn += ' under';
if (cell.attrs & (1<<4)) cn += ' blink';
if (cell.attrs & (1<<5)) {
cn += ' fraktur';
// perform substitution
if (t >= 'a' && t <= 'z') {
t = String.fromCodePoint(0x1d51e - 97 + t.charCodeAt(0));
}
else if (t >= 'A' && t <= 'Z') {
// this set is incomplete, some exceptions are needed
if (frakturExceptions.hasOwnProperty(t)) {
t = frakturExceptions[t];
} else {
t = String.fromCodePoint(0x1d504 - 65 + t.charCodeAt(0));
}
}
elem.textContent = t;
}
if (cell.attrs & (1<<6)) cn += ' strike';
if (cell.attrs & (1<<1)) {
cn += ' faint';
// faint requires special html - otherwise it would also dim the background.
// we use opacity on the text...
elem.innerHTML = '<span>' + e(elem.textContent) + '</span>';
}
elem.className = cn;
}
/** Show entire screen */
function _drawAll() {
for (var i = W*H-1; i>=0; i--) {
_draw(screen[i]);
}
}
function _rebuild(rows, cols) {
W = cols;
H = rows;
/* Build screen & show */
var e, cell, scr = qs('#screen');
// Empty the screen node
while (scr.firstChild) scr.removeChild(scr.firstChild);
screen = [];
for(var i = 0; i < W*H; i++) {
e = mk('span');
(function() {
var x = i % W;
var y = Math.floor(i / W);
e.addEventListener('mouseenter', function (evt) {
Input.onMouseMove(x, y);
});
e.addEventListener('mousedown', function (evt) {
Input.onMouseDown(x, y, evt.button+1);
});
e.addEventListener('mouseup', function (evt) {
Input.onMouseUp(x, y, evt.button+1);
});
e.addEventListener('contextmenu', function (evt) {
evt.preventDefault();
});
e.addEventListener('mousewheel', function (evt) {
Input.onMouseWheel(x, y, evt.deltaY>0?1:-1);
return false;
});
})();
/* End of line */
if ((i > 0) && (i % W == 0)) {
scr.appendChild(mk('br'));
}
/* The cell */
scr.appendChild(e);
cell = {
t: ' ',
fg: 7,
bg: 0, // the colors will be replaced immediately as we receive data (user won't see this)
attrs: 0,
e: e,
x: i % W,
y: Math.floor(i / W),
};
screen.push(cell);
_draw(cell);
}
}
/** Init the terminal */
function _init() {
/* Cursor blinking */
clearInterval(blinkIval);
blinkIval = setInterval(function () {
cursor.a = !cursor.a;
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// TODO try to invent a new way to indicate "hanging" - this is copied from gtkterm
if (cursor.hidden || cursor.hanging) {
cursor.a = false;
}
if (!cursor.suppress) {
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_draw(_curCell(), cursor.forceOn || cursor.a);
}
}, 500);
// blink attribute
setInterval(function () {
$('#screen').removeClass('blink-hide');
setTimeout(function () {
$('#screen').addClass('blink-hide');
}, 800); // 200 ms ON
}, 1000);
inited = true;
}
var SEQ_SET_COLOR_ATTR = 1;
var SEQ_REPEAT = 2;
var SEQ_SET_COLOR = 3;
var SEQ_SET_ATTR = 4;
function _load_content(str) {
var i = 0, ci = 0, j, jc, num, num2, t = ' ', fg, bg, attrs, cell;
if (!inited) _init();
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var cursorMoved;
// Set size
num = parse2B(str, i); i += 2; // height
num2 = parse2B(str, i); i += 2; // width
if (num != H || num2 != W) {
_rebuild(num, num2);
}
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// console.log("Size ",num, num2);
// Cursor position
num = parse2B(str, i); i += 2; // row
num2 = parse2B(str, i); i += 2; // col
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cursorMoved = (cursor.x != num2 || cursor.y != num);
cursorSet(num, num2);
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// console.log("Cursor at ",num, num2);
// Attributes
num = parse2B(str, i); i += 2; // fg bg bold hidden
cursor.hidden = !(num & 0x0001);
cursor.hanging = !!(num & 0x0002);
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// console.log("Attributes word ",num.toString(16)+'h');
Input.setAlts(
!!(num & 0x0004), // cu
!!(num & 0x0008), // np
!!(num & 0x0010) // fn
);
fg = 7;
bg = 0;
attrs = 0;
// Here come the content
while(i < str.length && ci<W*H) {
j = str[i++];
jc = j.charCodeAt(0);
if (jc == SEQ_SET_COLOR_ATTR) {
num = parse3B(str, i); i += 3;
fg = num & 0x0F;
bg = (num & 0xF0) >> 4;
attrs = (num & 0xFF00)>>8;
}
else if (jc == SEQ_SET_COLOR) {
num = parse2B(str, i); i += 2;
fg = num & 0x0F;
bg = (num & 0xF0) >> 4;
}
else if (jc == SEQ_SET_ATTR) {
num = parse2B(str, i); i += 2;
attrs = num & 0xFF;
}
else if (jc == SEQ_REPEAT) {
num = parse2B(str, i); i += 2;
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// console.log("Repeat x ",num);
for (; num>0 && ci<W*H; num--) {
cell = screen[ci++];
cell.fg = fg;
cell.bg = bg;
cell.t = t;
cell.attrs = attrs;
}
}
else {
cell = screen[ci++];
// Unique cell character
t = cell.t = j;
cell.fg = fg;
cell.bg = bg;
cell.attrs = attrs;
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// console.log("Symbol ", j);
}
}
_drawAll();
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// if (!cursor.hidden || cursor.hanging || !cursor.suppress) {
// // hide cursor asap
// _draw(_curCell(), false);
// }
if (cursorMoved) {
cursor.forceOn = true;
cursorFlashStartIval = setTimeout(function() {
cursor.forceOn = false;
}, 1200);
_draw(_curCell(), true);
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}
}
function _load_labels(str) {
var pieces = str.split('\x01');
qs('h1').textContent = pieces[0];
qsa('#buttons button').forEach(function(x, i) {
var s = pieces[i+1].trim();
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// if empty string, use the "dim" effect and put nbsp instead to stretch the btn vertically
x.innerHTML = s.length > 0 ? e(s) : "&nbsp;";
x.style.opacity = s.length > 0 ? 1 : 0.2;
});
}
function _beep()
{
var osc, gain;
if (!audioCtx) return;
// Main beep
osc = audioCtx.createOscillator();
gain = audioCtx.createGain();
osc.connect(gain);
gain.connect(audioCtx.destination);
gain.gain.value = 0.5;
osc.frequency.value = 750;
osc.type = 'sine';
osc.start();
osc.stop(audioCtx.currentTime+0.05);
// Surrogate beep (making it sound like 'oops')
osc = audioCtx.createOscillator();
gain = audioCtx.createGain();
osc.connect(gain);
gain.connect(audioCtx.destination);
gain.gain.value = 0.2;
osc.frequency.value = 400;
osc.type = 'sine';
osc.start(audioCtx.currentTime+0.05);
osc.stop(audioCtx.currentTime+0.08);
}
/** Load screen content from a binary sequence (new) */
function load(str) {
var content = str.substr(1);
switch(str.charAt(0)) {
case 'S':
_load_content(content);
break;
case 'T':
_load_labels(content);
break;
case 'B':
_beep();
break;
default:
console.warn("Bad data message type, ignoring.");
}
}
return {
load: load, // full load (string)
};
})();
/** Handle connections */
var Conn = (function() {
var ws;
var heartbeatTout;
var pingIv;
function onOpen(evt) {
console.log("CONNECTED");
}
function onClose(evt) {
console.warn("SOCKET CLOSED, code "+evt.code+". Reconnecting...");
setTimeout(function() {
init();
}, 200);
// this happens when the buffer gets fucked up via invalid unicode.
// we basically use polling instead of socket then
}
function onMessage(evt) {
try {
// . = heartbeat
if (evt.data != '.') {
//console.log("RX: ", evt.data);
// Assume all our messages are screen updates
Screen.load(evt.data);
}
heartbeat();
} catch(e) {
console.error(e);
}
}
function doSend(message) {
console.log("TX: ", message);
if (!ws) return; // for dry testing
if (ws.readyState != 1) {
console.error("Socket not ready");
return;
}
if (typeof message != "string") {
message = JSON.stringify(message);
}
ws.send(message);
}
function init() {
heartbeat();
ws = new WebSocket("ws://"+_root+"/term/update.ws");
ws.onopen = onOpen;
ws.onclose = onClose;
ws.onmessage = onMessage;
console.log("Opening socket.");
// Ask for initial data
$.get('http://'+_root+'/term/init', function(resp, status) {
if (status !== 200) location.reload(true);
console.log("Data received!");
Screen.load(resp);
heartbeat();
showPage();
});
}
function heartbeat() {
clearTimeout(heartbeatTout);
heartbeatTout = setTimeout(heartbeatFail, 2000);
}
function heartbeatFail() {
console.error("Heartbeat lost, probing server...");
pingIv = setInterval(function() {
console.log("> ping");
$.get('http://'+_root+'/system/ping', function(resp, status) {
if (status == 200) {
clearInterval(pingIv);
console.info("Server ready, reloading page...");
location.reload();
}
}, {
timeout: 100,
});
}, 500);
}
return {
ws: null,
init: init,
send: doSend
};
})();
/**
* User input
*
* --- Rx messages: ---
* S - screen content (binary encoding of the entire screen with simple compression)
* T - text labels - Title and buttons, \0x01-separated
* B - beep
* . - heartbeat
*
* --- Tx messages ---
* s - string
* b - action button
* p - mb press
* r - mb release
* m - mouse move
*/
var Input = (function() {
var opts = {
np_alt: false,
cu_alt: false,
fn_alt: false,
};
function sendStrMsg(str) {
Conn.send("s"+str);
}
function sendBtnMsg(n) {
Conn.send("b"+Chr(n));
}
function fa(alt, normal) {
return opts.fn_alt ? alt : normal;
}
function ca(alt, normal) {
return opts.cu_alt ? alt : normal;
}
function na(alt, normal) {
return opts.np_alt ? alt : normal;
}
function _bindFnKeys() {
var keymap = {
'tab': '\x09',
'backspace': '\x08',
'enter': '\x0d',
'ctrl+enter': '\x0a',
'esc': '\x1b',
'up': ca('\x1bOA', '\x1b[A'),
'down': ca('\x1bOB', '\x1b[B'),
'right': ca('\x1bOC', '\x1b[C'),
'left': ca('\x1bOD', '\x1b[D'),
'home': ca('\x1bOH', fa('\x1b[H', '\x1b[1~')),
'insert': '\x1b[2~',
'delete': '\x1b[3~',
'end': ca('\x1bOF', fa('\x1b[F', '\x1b[4~')),
'pageup': '\x1b[5~',
'pagedown': '\x1b[6~',
'f1': fa('\x1bOP', '\x1b[11~'),
'f2': fa('\x1bOQ', '\x1b[12~'),
'f3': fa('\x1bOR', '\x1b[13~'),
'f4': fa('\x1bOS', '\x1b[14~'),
'f5': '\x1b[15~', // note the disconnect
'f6': '\x1b[17~',
'f7': '\x1b[18~',
'f8': '\x1b[19~',
'f9': '\x1b[20~',
'f10': '\x1b[21~', // note the disconnect
'f11': '\x1b[23~',
'f12': '\x1b[24~',
'shift+f1': fa('\x1bO1;2P', '\x1b[25~'),
'shift+f2': fa('\x1bO1;2Q', '\x1b[26~'), // note the disconnect
'shift+f3': fa('\x1bO1;2R', '\x1b[28~'),
'shift+f4': fa('\x1bO1;2S', '\x1b[29~'), // note the disconnect
'shift+f5': fa('\x1b[15;2~', '\x1b[31~'),
'shift+f6': fa('\x1b[17;2~', '\x1b[32~'),
'shift+f7': fa('\x1b[18;2~', '\x1b[33~'),
'shift+f8': fa('\x1b[19;2~', '\x1b[34~'),
'shift+f9': fa('\x1b[20;2~', '\x1b[35~'), // 35-38 are not standard - but what is?
'shift+f10': fa('\x1b[21;2~', '\x1b[36~'),
'shift+f11': fa('\x1b[22;2~', '\x1b[37~'),
'shift+f12': fa('\x1b[23;2~', '\x1b[38~'),
'np_0': na('\x1bOp', '0'),
'np_1': na('\x1bOq', '1'),
'np_2': na('\x1bOr', '2'),
'np_3': na('\x1bOs', '3'),
'np_4': na('\x1bOt', '4'),
'np_5': na('\x1bOu', '5'),
'np_6': na('\x1bOv', '6'),
'np_7': na('\x1bOw', '7'),
'np_8': na('\x1bOx', '8'),
'np_9': na('\x1bOy', '9'),
'np_mul': na('\x1bOR', '*'),
'np_add': na('\x1bOl', '+'),
'np_sub': na('\x1bOS', '-'),
'np_point': na('\x1bOn', '.'),
'np_div': na('\x1bOQ', '/'),
// we don't implement numlock key (should change in numpad_alt mode, but it's even more useless than the rest)
};
for (var k in keymap) {
if (keymap.hasOwnProperty(k)) {
bind(k, keymap[k]);
}
}
}
function bind(combo, str) {
// mac fix - allow also cmd
if (combo.indexOf('ctrl+') !== -1) {
combo += ',' + combo.replace('ctrl', 'command');
}
// unbind possible old binding
key.unbind(combo);
key(combo, function (e) {
e.preventDefault();
sendStrMsg(str)
});
}
function _initKeys() {
// This takes care of text characters typed
window.addEventListener('keypress', function(evt) {
var str = '';
if (evt.key) str = evt.key;
else if (evt.which) str = String.fromCodePoint(evt.which);
if (str.length>0 && str.charCodeAt(0) >= 32) {
// console.log("Typed ", str);
sendStrMsg(str);
}
});
// ctrl-letter codes are sent as simple low ASCII codes
for (var i = 1; i<=26;i++) {
bind('ctrl+' + String.fromCharCode(96+i), String.fromCharCode(i));
}
bind('ctrl+]', '\x1b'); // alternate way to enter ESC
bind('ctrl+\\', '\x1c');
bind('ctrl+[', '\x1d');
bind('ctrl+^', '\x1e');
bind('ctrl+_', '\x1f');
_bindFnKeys();
}
var mb1 = 0;
var mb2 = 0;
var mb3 = 0;
function init() {
_initKeys();
// Button presses
qsa('#buttons button').forEach(function(s) {
s.addEventListener('click', function() {
sendBtnMsg(+this.dataset['n']);
});
});
window.addEventListener('mousedown', function(evt) {
if (evt.button == 0) mb1 = 1;
if (evt.button == 1) mb2 = 1;
if (evt.button == 2) mb3 = 1;
});
window.addEventListener('mouseup', function(evt) {
if (evt.button == 0) mb1 = 0;
if (evt.button == 1) mb2 = 0;
if (evt.button == 2) mb3 = 0;
});
}
function packModifiersForMouse() {
return (key.isModifier('ctrl')?1:0) |
(key.isModifier('shift')?2:0) |
(key.isModifier('alt')?4:0) |
(key.isModifier('meta')?8:0);
}
return {
init: init,
// onTap: sendPosMsg,
sendString: sendStrMsg,
setAlts: function(cu, np, fn) {
if (opts.cu_alt != cu || opts.np_alt != np || opts.fn_alt != fn) {
opts.cu_alt = cu;
opts.np_alt = np;
opts.fn_alt = fn;
// rebind keys - codes have changed
_bindFnKeys();
}
},
onMouseMove: function (x, y) {
var b = mb1 ? 1 : mb2 ? 2 : mb3 ? 3 : 0;
var m = packModifiersForMouse();
Conn.send("m" + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m));
},
onMouseDown: function (x, y, b) {
if (b > 3 || b < 1) return;
var m = packModifiersForMouse();
Conn.send("p" + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m));
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console.log("B ",b," M ",m);
},
onMouseUp: function (x, y, b) {
if (b > 3 || b < 1) return;
var m = packModifiersForMouse();
Conn.send("r" + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m));
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console.log("B ",b," M ",m);
},
onMouseWheel: function (x, y, dir) {
// -1 ... btn 4 (away from user)
// +1 ... btn 5 (towards user)
var m = packModifiersForMouse();
var b = (dir < 0 ? 4 : 5);
Conn.send("p" + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m));
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console.log("B ",b," M ",m);
},
};
})();
window.termInit = function () {
Conn.init();
Input.init();
};