ESPTerm web interface submodule, separated to make testing and development easier
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espterm-front-end/jssrc/term_input.js

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/**
* 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,
mt_click: false,
mt_move: false,
no_keys: false,
crlf_mode: false,
};
/** Send a literal message */
function sendStrMsg(str) {
return Conn.send("s"+str);
}
/** Send a button event */
function sendBtnMsg(n) {
Conn.send("b"+Chr(n));
}
/** Fn alt choice for key message */
function fa(alt, normal) {
return opts.fn_alt ? alt : normal;
}
/** Cursor alt choice for key message */
function ca(alt, normal) {
return opts.cu_alt ? alt : normal;
}
/** Numpad alt choice for key message */
function na(alt, normal) {
return opts.np_alt ? alt : normal;
}
function _bindFnKeys() {
var keymap = {
'tab': '\x09',
'backspace': '\x08',
'enter': opts.crlf_mode ? '\x0d\x0a' : '\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]);
}
}
}
/** Bind a keystroke to message */
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) {
if (opts.no_keys) return;
e.preventDefault();
sendStrMsg(str)
});
}
/** Bind/rebind key messages */
function _initKeys() {
// This takes care of text characters typed
window.addEventListener('keypress', function(evt) {
if (opts.no_keys) return;
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();
}
// mouse button states
var mb1 = 0;
var mb2 = 0;
var mb3 = 0;
/** Init the Input module */
function init() {
_initKeys();
// Button presses
$('#action-buttons button').forEach(function(s) {
s.addEventListener('click', function() {
sendBtnMsg(+this.dataset['n']);
});
});
// global mouse state tracking - for motion reporting
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;
});
}
/** Prepare modifiers byte for mouse message */
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 the Input module */
init: init,
/** Send a literal string message */
sendString: sendStrMsg,
/** Enable alternate key modes (cursors, numpad, fn) */
setAlts: function(cu, np, fn, crlf) {
if (opts.cu_alt != cu || opts.np_alt != np || opts.fn_alt != fn || opts.crlf_mode != crlf) {
opts.cu_alt = cu;
opts.np_alt = np;
opts.fn_alt = fn;
opts.crlf_mode = crlf;
// rebind keys - codes have changed
_bindFnKeys();
}
},
setMouseMode: function(click, move) {
opts.mt_click = click;
opts.mt_move = move;
},
// Mouse events
onMouseMove: function (x, y) {
if (!opts.mt_move) return;
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 (!opts.mt_click) return;
if (b > 3 || b < 1) return;
var m = packModifiersForMouse();
Conn.send("p" + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m));
// console.log("B ",b," M ",m);
},
onMouseUp: function (x, y, b) {
if (!opts.mt_click) return;
if (b > 3 || b < 1) return;
var m = packModifiersForMouse();
Conn.send("r" + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m));
// console.log("B ",b," M ",m);
},
onMouseWheel: function (x, y, dir) {
if (!opts.mt_click) return;
// -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));
// console.log("B ",b," M ",m);
},
mouseTracksClicks: function() {
return opts.mt_click;
},
blockKeys: function(yes) {
opts.no_keys = yes;
}
};
})();