You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
340 lines
6.9 KiB
340 lines
6.9 KiB
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,
|
|
bold: false,
|
|
suppress: false, // do not turn on in blink interval (for safe moving)
|
|
hidden: false // do not show
|
|
};
|
|
|
|
var screen = [];
|
|
var blinkIval;
|
|
|
|
/** Clear screen */
|
|
function _clear() {
|
|
for (var i = W*H-1; i>=0; i--) {
|
|
var cell = screen[i];
|
|
cell.t = ' ';
|
|
cell.bg = cursor.bg;
|
|
cell.fg = cursor.fg;
|
|
cell.bold = false;
|
|
_draw(cell);
|
|
}
|
|
}
|
|
|
|
/** Set text and color at XY */
|
|
function _cellAt(y, x) {
|
|
return screen[y*W+x];
|
|
}
|
|
|
|
/** Get cell under cursor */
|
|
function _curCell() {
|
|
return screen[cursor.y*W + cursor.x];
|
|
}
|
|
|
|
/** Enable or disable cursor visibility */
|
|
function _cursorEnable(enable) {
|
|
cursor.hidden = !enable;
|
|
cursor.a &= enable;
|
|
_draw(_curCell());
|
|
}
|
|
|
|
/** 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) {
|
|
if (typeof inv == 'undefined') {
|
|
inv = cursor.a && cursor.x == cell.x && cursor.y == cell.y;
|
|
}
|
|
|
|
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 + (cell.bold ? ' bold' : '');
|
|
}
|
|
|
|
/** 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('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: cursor.fg,
|
|
bg: cursor.bg,
|
|
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;
|
|
if (cursor.hidden) {
|
|
cursor.a = false;
|
|
}
|
|
|
|
if (!cursor.suppress) {
|
|
_draw(_curCell(), cursor.a);
|
|
}
|
|
}, 500);
|
|
inited = true;
|
|
}
|
|
|
|
/** Decode two-byte number */
|
|
function parse2B(s, i) {
|
|
return (s.charCodeAt(i++) - 1) + (s.charCodeAt(i) - 1) * 127;
|
|
}
|
|
|
|
var SEQ_SET_COLOR = 1;
|
|
var SEQ_REPEAT = 2;
|
|
|
|
/** Load screen content from a binary sequence (new) */
|
|
function load(str) {
|
|
var i = 0, ci = 0, j, jc, num, num2, t = ' ', fg, bg, bold, cell;
|
|
|
|
if (!inited) _init();
|
|
|
|
// Set size
|
|
num = parse2B(str, i); i += 2; // height
|
|
num2 = parse2B(str, i); i += 2; // width
|
|
if (num != H || num2 != W) {
|
|
_rebuild(num, num2);
|
|
}
|
|
console.log("Size ",num, num2);
|
|
|
|
// Cursor position
|
|
num = parse2B(str, i); i += 2; // row
|
|
num2 = parse2B(str, i); i += 2; // col
|
|
cursorSet(num, num2);
|
|
console.log("Cursor at ",num, num2);
|
|
|
|
// Attributes
|
|
num = parse2B(str, i); i += 2; // fg bg bold hidden
|
|
cursor.fg = num & 0x0F;
|
|
cursor.bg = (num & 0xF0) >> 4;
|
|
cursor.bold = !!(num & 0x100);
|
|
cursor.hidden = !(num & 0x200);
|
|
console.log("FG ",cursor.fg, ", BG ", cursor.bg,", BOLD ", cursor.bold, ", HIDE ", cursor.hidden);
|
|
|
|
fg = cursor.fg;
|
|
bg = cursor.bg;
|
|
bold = cursor.bold;
|
|
|
|
// Here come the content
|
|
while(i < str.length && ci<W*H) {
|
|
|
|
j = str[i++];
|
|
jc = j.charCodeAt(0);
|
|
if (jc == SEQ_SET_COLOR) {
|
|
num = parse2B(str, i); i += 2;
|
|
fg = num & 0x0F;
|
|
bg = (num & 0xF0) >> 4;
|
|
bold = !!(num & 0x100);
|
|
console.log("Switch to ",fg,bg,bold);
|
|
}
|
|
else if (jc == SEQ_REPEAT) {
|
|
num = parse2B(str, i); i += 2;
|
|
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.bold = bold;
|
|
}
|
|
}
|
|
else {
|
|
cell = screen[ci++];
|
|
// Unique cell character
|
|
t = cell.t = j;
|
|
cell.fg = fg;
|
|
cell.bg = bg;
|
|
cell.bold = bold;
|
|
console.log("Symbol ", j);
|
|
}
|
|
}
|
|
|
|
_drawAll();
|
|
}
|
|
|
|
return {
|
|
load: load, // full load (string)
|
|
};
|
|
})();
|
|
|
|
/** 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
|
|
Screen.load(evt.data);
|
|
} 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() {
|
|
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);
|
|
});
|
|
}
|
|
|
|
return {
|
|
ws: null,
|
|
init: init,
|
|
send: doSend
|
|
};
|
|
})();
|
|
|
|
/** User 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 10:
|
|
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 () {
|
|
Conn.init();
|
|
Input.init();
|
|
};
|
|
|