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

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6.0 KiB

(function() {
/**
* Terminal module
*/
var Term = (function () {
var W, H;
var cursor = {a: false, x: 0, y: 0, suppress: false, hidden: false};
var screen = [];
var blinkIval;
/*
/!** Clear screen *!/
function cls() {
screen.forEach(function(cell, i) {
cell.t = ' ';
cell.fg = 7;
cell.bg = 0;
blit(cell);
});
}
*/
/** Set text and color at XY */
function cellAt(y, x) {
return screen[y*W+x];
}
/** Get cell under cursor */
function cursorCell() {
return cellAt(cursor.y, cursor.x);
}
/*
/!** Enable or disable cursor visibility *!/
function cursorEnable(enable) {
cursor.hidden = !enable;
cursor.a &= enable;
blit(cursorCell(), cursor.a);
}
/!** Safely move cursor *!/
function cursorSet(y, x) {
// Hide and prevent from showing up during the move
cursor.suppress = true;
blit(cursorCell(), false);
cursor.x = x;
cursor.y = y;
// Show again
cursor.suppress = false;
blit(cursorCell(), cursor.a);
}
*/
/** Update cell on display. inv = invert (for cursor) */
function blit(cell, inv) {
var e = cell.e, fg, bg;
// Colors
fg = inv ? cell.bg : cell.fg;
bg = inv ? cell.fg : cell.bg;
// Update
e.innerText = (cell.t+' ')[0];
e.className = 'fg'+fg+' bg'+bg;
}
/** Show entire screen */
function blitAll() {
screen.forEach(function(cell, i) {
/* Invert if under cursor & cursor active */
var inv = cursor.a && (i == cursor.y*W+cursor.x);
blit(cell, inv);
});
}
/** Load screen content from a 'binary' sequence */
function load(obj) {
cursor.x = obj.x;
cursor.y = obj.y;
cursor.hidden = !obj.cv;
// full re-init if size changed
if (obj.w != W || obj.h != H) {
Term.init(obj);
return;
}
// Simple compression - hexFG hexBG 'ASCII' (r/s/t/u NUM{1,2,3,4})?
// comma instead of both colors = same as before
var i = 0, ci = 0, str = obj.screen;
var fg = 7, bg = 0;
while(i < str.length && ci<W*H) {
var cell = screen[ci++];
var j = str[i];
if (j != ',') { // comma = repeat last colors
fg = cell.fg = parseInt(str[i++], 16);
bg = cell.bg = parseInt(str[i++], 16);
} else {
i++;
cell.fg = fg;
cell.bg = bg;
}
var t = cell.t = str[i++];
var repchars = 0;
switch(str[i]) {
case 'r': repchars = 1; break;
case 's': repchars = 2; break;
case 't': repchars = 3; break;
case 'u': repchars = 4; break;
default: repchars = 0;
}
if (repchars > 0) {
var rep = parseInt(str.substr(i+1,repchars));
i = i + repchars + 1;
for (; rep>0 && ci<W*H; rep--) {
cell = screen[ci++];
cell.fg = fg;
cell.bg = bg;
cell.t = t;
}
}
}
blitAll();
}
/** Init the terminal */
function init(obj) {
W = obj.w;
H = obj.h;
/* 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('click', function () {
Input.onTap(y, x);
});
})();
/* End of line */
if ((i > 0) && (i % W == 0)) {
scr.appendChild(mk('br'));
}
/* The cell */
scr.appendChild(e);
cell = {t: ' ', fg: 7, bg: 0, e: e};
screen.push(cell);
blit(cell);
}
/* Cursor blinking */
clearInterval(blinkIval);
blinkIval = setInterval(function() {
cursor.a = !cursor.a;
if (cursor.hidden) {
cursor.a = false;
}
if (!cursor.suppress) {
blit(cursorCell(), cursor.a);
}
}, 500);
load(obj);
}
// publish
return {
init: init,
load: load
};
})();
/** Handle connections */
var Conn = (function() {
var ws;
function onOpen(evt) {
console.log("CONNECTED");
}
function onClose(evt) {
console.warn("SOCKET CLOSED, code "+evt.code+". Reconnecting...");
setTimeout(function() {
init();
}, 1000);
}
function onMessage(evt) {
try {
console.log("RX: ", evt.data);
// Assume all our messages are screen updates
Term.load(JSON.parse(evt.data));
} catch(e) {
console.error(e);
}
}
function doSend(message) {
console.log("TX: ", message);
if (ws.readyState != 1) {
console.error("Socket not ready");
return;
}
if (typeof message != "string") {
message = JSON.stringify(message);
}
ws.send(message);
}
function init() {
ws = new WebSocket("ws://"+_root+"/ws/update.cgi");
ws.onopen = onOpen;
ws.onclose = onClose;
ws.onmessage = onMessage;
console.log("Opening socket.");
}
return {
ws: null,
init: init,
send: doSend
};
})();
//
// Keyboard (& mouse) input
//
var Input = (function() {
function sendStrMsg(str) {
Conn.send("STR:"+str);
}
function sendPosMsg(y, x) {
Conn.send("TAP:"+y+','+x);
}
function sendBtnMsg(n) {
Conn.send("BTN:"+n);
}
function init() {
window.addEventListener('keypress', function(e) {
var code = +e.which;
if (code >= 32 && code < 127) {
var ch = String.fromCharCode(code);
//console.log("Typed ", ch, "code", code, e);
sendStrMsg(ch);
}
});
window.addEventListener('keydown', function(e) {
var code = e.keyCode;
//console.log("Down ", code, e);
switch(code) {
case 8: sendStrMsg('\x08'); break;
case 13: sendStrMsg('\x0d\x0a'); break;
case 27: sendStrMsg('\x1b'); break; // this allows to directly enter control sequences
case 37: sendStrMsg('\x1b[D'); break;
case 38: sendStrMsg('\x1b[A'); break;
case 39: sendStrMsg('\x1b[C'); break;
case 40: sendStrMsg('\x1b[B'); break;
}
});
qsa('#buttons button').forEach(function(s) {
s.addEventListener('click', function() {
sendBtnMsg(+this.dataset['n']);
});
});
}
return {
init: init,
onTap: sendPosMsg
};
})();
window.termInit = function (obj) {
Term.init(obj);
Conn.init();
Input.init();
}
})();