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.
378 lines
8.9 KiB
378 lines
8.9 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,
|
|
attrs: 0,
|
|
suppress: false, // do not turn on in blink interval (for safe moving)
|
|
forceOn: false, // force on unless hanging: used to keep cursor visible during move
|
|
hidden: false, // do not show (DEC opt)
|
|
hanging: false, // cursor at column "W+1" - not visible
|
|
};
|
|
|
|
var screen = [];
|
|
var blinkIval;
|
|
var cursorFlashStartIval;
|
|
|
|
// Some non-bold Fraktur symbols are outside the contiguous block
|
|
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("No AudioContext!", 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());
|
|
}
|
|
|
|
function alpha2fraktur(t) {
|
|
// 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));
|
|
}
|
|
}
|
|
return t;
|
|
}
|
|
|
|
/** Update cell on display. inv = invert (for cursor) */
|
|
function _draw(cell, inv) {
|
|
if (!cell) return;
|
|
if (typeof inv == 'undefined') {
|
|
inv = cursor.a && cursor.x == cell.x && cursor.y == cell.y;
|
|
}
|
|
|
|
var fg, bg, cn, t;
|
|
|
|
fg = inv ? cell.bg : cell.fg;
|
|
bg = inv ? cell.fg : cell.bg;
|
|
|
|
t = cell.t;
|
|
if (!t.length) t = ' ';
|
|
|
|
cn = 'fg' + fg + ' bg' + bg;
|
|
if (cell.attrs & (1<<0)) cn += ' bold';
|
|
if (cell.attrs & (1<<1)) cn += ' faint';
|
|
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';
|
|
t = alpha2fraktur(t);
|
|
}
|
|
if (cell.attrs & (1<<6)) cn += ' strike';
|
|
|
|
cell.slot.textContent = t;
|
|
cell.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 cOuter, cInner, cell, screenDiv = qs('#screen');
|
|
|
|
// Empty the screen node
|
|
while (screenDiv.firstChild) screenDiv.removeChild(screenDiv.firstChild);
|
|
|
|
screen = [];
|
|
|
|
for(var i = 0; i < W*H; i++) {
|
|
cOuter = mk('span');
|
|
cInner = mk('span');
|
|
|
|
/* Mouse tracking */
|
|
(function() {
|
|
var x = i % W;
|
|
var y = Math.floor(i / W);
|
|
cOuter.addEventListener('mouseenter', function (evt) {
|
|
Input.onMouseMove(x, y);
|
|
});
|
|
cOuter.addEventListener('mousedown', function (evt) {
|
|
Input.onMouseDown(x, y, evt.button+1);
|
|
});
|
|
cOuter.addEventListener('mouseup', function (evt) {
|
|
Input.onMouseUp(x, y, evt.button+1);
|
|
});
|
|
cOuter.addEventListener('contextmenu', function (evt) {
|
|
if (Input.mouseTracksClicks()) {
|
|
evt.preventDefault();
|
|
}
|
|
});
|
|
cOuter.addEventListener('mousewheel', function (evt) {
|
|
Input.onMouseWheel(x, y, evt.deltaY>0?1:-1);
|
|
return false;
|
|
});
|
|
})();
|
|
|
|
/* End of line */
|
|
if ((i > 0) && (i % W == 0)) {
|
|
screenDiv.appendChild(mk('br'));
|
|
}
|
|
/* The cell */
|
|
cOuter.appendChild(cInner);
|
|
screenDiv.appendChild(cOuter);
|
|
|
|
cell = {
|
|
t: ' ',
|
|
fg: 7,
|
|
bg: 0, // the colors will be replaced immediately as we receive data (user won't see this)
|
|
attrs: 0,
|
|
elem: cOuter,
|
|
slot: cInner,
|
|
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.hanging) {
|
|
cursor.a = false;
|
|
}
|
|
|
|
if (!cursor.suppress) {
|
|
_draw(_curCell(), cursor.forceOn || cursor.a);
|
|
}
|
|
}, 500);
|
|
|
|
/* blink attribute animation */
|
|
setInterval(function () {
|
|
$('#screen').removeClass('blink-hide');
|
|
setTimeout(function () {
|
|
$('#screen').addClass('blink-hide');
|
|
}, 800); // 200 ms ON
|
|
}, 1000);
|
|
|
|
inited = true;
|
|
}
|
|
|
|
// constants for decoding the update blob
|
|
var SEQ_SET_COLOR_ATTR = 1;
|
|
var SEQ_REPEAT = 2;
|
|
var SEQ_SET_COLOR = 3;
|
|
var SEQ_SET_ATTR = 4;
|
|
|
|
/** Parse received screen update object (leading S removed already) */
|
|
function _load_content(str) {
|
|
var i = 0, ci = 0, j, jc, num, num2, t = ' ', fg, bg, attrs, cell;
|
|
|
|
if (!inited) _init();
|
|
|
|
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);
|
|
}
|
|
// console.log("Size ",num, num2);
|
|
|
|
// Cursor position
|
|
num = parse2B(str, i); i += 2; // row
|
|
num2 = parse2B(str, i); i += 2; // col
|
|
cursorMoved = (cursor.x != num2 || cursor.y != num);
|
|
cursorSet(num, num2);
|
|
// console.log("Cursor at ",num, num2);
|
|
|
|
// Attributes
|
|
num = parse2B(str, i); i += 2; // fg bg attribs
|
|
cursor.hidden = !(num & (1<<0)); // DEC opt "visible"
|
|
cursor.hanging = !!(num & (1<<1));
|
|
// console.log("Attributes word ",num.toString(16)+'h');
|
|
|
|
Input.setAlts(
|
|
!!(num & (1<<2)), // cursors alt
|
|
!!(num & (1<<3)), // numpad alt
|
|
!!(num & (1<<4)) // fn keys alt
|
|
);
|
|
|
|
var mt_click = !!(num & (1<<5));
|
|
var mt_move = !!(num & (1<<6));
|
|
Input.setMouseMode(
|
|
mt_click,
|
|
mt_move
|
|
);
|
|
$('#screen').toggleClass('noselect', mt_move);
|
|
|
|
var show_buttons = !!(num & (1<<7));
|
|
var show_config_links = !!(num & (1<<8));
|
|
$('.x-term-conf-btn').toggleClass('hidden', !show_config_links);
|
|
$('#action-buttons').toggleClass('hidden', !show_buttons);
|
|
|
|
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;
|
|
// 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;
|
|
// console.log("Symbol ", j);
|
|
}
|
|
}
|
|
|
|
_drawAll();
|
|
|
|
// 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);
|
|
}
|
|
}
|
|
|
|
/** Apply labels to buttons and screen title (leading T removed already) */
|
|
function _load_labels(str) {
|
|
var pieces = str.split('\x01');
|
|
qs('h1').textContent = pieces[0];
|
|
$('#action-buttons button').forEach(function(x, i) {
|
|
var s = pieces[i+1].trim();
|
|
// if empty string, use the "dim" effect and put nbsp instead to stretch the btn vertically
|
|
x.innerHTML = s.length > 0 ? e(s) : " ";
|
|
x.style.opacity = s.length > 0 ? 1 : 0.2;
|
|
})
|
|
}
|
|
|
|
/** Audible beep for ASCII 7 */
|
|
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) {
|
|
//console.log(JSON.stringify(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.");
|
|
console.log(str);
|
|
}
|
|
}
|
|
|
|
return {
|
|
load: load, // full load (string)
|
|
};
|
|
})();
|
|
|