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316 lines
6.8 KiB
316 lines
6.8 KiB
//region Libs / utils
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/*
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* DOM selector
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*
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* Usage:
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* $('div');
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* $('#name');
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* $('.name');
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*
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*
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* Copyright (C) 2011 Jed Schmidt <http://jed.is> - WTFPL
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* More: https://gist.github.com/991057
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*
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*/
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var $ = function(
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a, // take a simple selector like "name", "#name", or ".name", and
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b // an optional context, and
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){
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a = a.match(/^(\W)?(.*)/); // split the selector into name and symbol.
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return( // return an element or list, from within the scope of
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b // the passed context
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|| document // or document,
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)[
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"getElement" + ( // obtained by the appropriate method calculated by
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a[1]
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? a[1] == "#"
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? "ById" // the node by ID,
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: "sByClassName" // the nodes by class name, or
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: "sByTagName" // the nodes by tag name,
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)
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](
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a[2] // called with the name.
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)
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};
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/*
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* Create DOM element
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*
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* Usage:
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* var el = m('<h1>Hello</h1>');
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* document.body.appendChild(el);
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*
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*
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* DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
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* Version 2, December 2004
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*
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* Copyright (C) 2011 Jed Schmidt <http://jed.is> - WTFPL
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* More: https://gist.github.com/966233
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*
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*/
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var m = function(
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a, // an HTML string
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b, // placeholder
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c // placeholder
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){
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b = document; // get the document,
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c = b.createElement("p"); // create a container element,
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c.innerHTML = a; // write the HTML to it, and
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a = b.createDocumentFragment(); // create a fragment.
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while ( // while
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b = c.firstChild // the container element has a first child
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) a.appendChild(b); // append the child to the fragment,
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return a // and then return the fragment.
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};
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//endregion
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//
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// Terminal class
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//
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(function () {
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function make(e) {return document.createElement(e)}
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var W = 26, H = 10; //26, 10
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var cursor = {a: false, x: 0, y: 0, suppress: false, hidden: false};
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var screen = [];
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/** Colors table */
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var CLR = [// dark gray #2E3436
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// 0 black, 1 red, 2 green, 3 yellow
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// 4 blue, 5 mag, 6 cyan, 7 white
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'#111213','#CC0000','#4E9A06','#C4A000',
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'#3465A4','#75507B','#06989A','#D3D7CF',
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// BRIGHT
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// 8 black, 9 red, 10 green, 11 yellow
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// 12 blue, 13 mag, 14 cyan, 15 white
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'#555753','#EF2929','#8AE234','#FCE94F',
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'#729FCF','#AD7FA8','#34E2E2','#EEEEEC'
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];
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/** Clear screen */
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function cls() {
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screen.forEach(function(cell, i) {
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cell.t = ' ';
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cell.fg = 7;
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cell.bg = 0;
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blit(cell);
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});
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}
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/** Set text and color at XY */
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function cellAt(y, x) {
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return screen[y*W+x];
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}
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/** Get cell under cursor */
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function cursorCell() {
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return cellAt(cursor.y, cursor.x);
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}
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/** Enable or disable cursor visibility */
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function cursorEnable(enable) {
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cursor.hidden = !enable;
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cursor.a &= enable;
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blit(cursorCell(), cursor.a);
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}
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/** Safely move cursor */
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function cursorSet(y, x) {
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// Hide and prevent from showing up during the move
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cursor.suppress = true;
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blit(cursorCell(), false);
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cursor.x = x;
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cursor.y = y;
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// Show again
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cursor.suppress = false;
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blit(cursorCell(), cursor.a);
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}
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/** Update cell on display. inv = invert (for cursor) */
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function blit(cell, inv) {
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var e = cell.e, fg, bg;
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// Colors
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fg = inv ? cell.bg : cell.fg;
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bg = inv ? cell.fg : cell.bg;
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// Update
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e.innerText = (cell.t+' ')[0];
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e.style.color = colorHex(fg);
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e.style.backgroundColor = colorHex(bg);
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e.style.fontWeight = fg > 7 ? 'bold' : 'normal';
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}
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/** Show entire screen */
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function blitAll() {
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screen.forEach(function(cell, i) {
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/* Invert if under cursor & cursor active */
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var inv = cursor.a && (i == cursor.y*W+cursor.x);
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blit(cell, inv);
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});
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}
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/** Load screen content from a 'binary' sequence */
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function load(obj) {
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cursor.x = obj.x;
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cursor.y = obj.y;
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// Simple compression - hexFG hexBG 'ASCII' (r/s/t/u NUM{1,2,3,4})?
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// comma instead of both colors = same as before
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var i = 0, ci = 0, str = obj.screen;
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var fg = 7, bg = 0;
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while(i < str.length && ci<W*H) {
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var cell = screen[ci++];
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var j = str[i];
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if (j != ',') { // comma = repeat last colors
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fg = cell.fg = parseInt(str[i++], 16);
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bg = cell.bg = parseInt(str[i++], 16);
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} else {
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i++;
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cell.fg = fg;
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cell.bg = bg;
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}
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var t = cell.t = str[i++];
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var repchars = 0;
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switch(str[i]) {
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case 'r': repchars = 1; break;
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case 's': repchars = 2; break;
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case 't': repchars = 3; break;
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case 'u': repchars = 4; break;
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default: repchars = 0;
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}
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if (repchars > 0) {
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var rep = parseInt(str.substr(i+1,repchars));
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i = i + repchars + 1;
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for (; rep>0 && ci<W*H; rep--) {
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cell = screen[ci++];
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cell.fg = fg;
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cell.bg = bg;
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cell.t = t;
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}
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}
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}
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blitAll();
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}
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/** Parse color */
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function colorHex(c) {
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c = parseInt(c);
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if (c < 0 || c > 15) c = 0;
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return CLR[c];
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}
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/** Init the terminal */
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function init(obj) {
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/* Build screen & show */
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var e, cell, scr = $('#screen');
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for(var i = 0; i < W*H; i++) {
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e = make('span');
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/* End of line */
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if ((i > 0) && (i % W == 0)) {
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scr.appendChild(make('br'));
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}
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/* The cell */
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scr.appendChild(e);
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cell = {t: ' ', fg: 7, bg: 0, e: e};
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screen.push(cell);
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blit(cell);
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}
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/* Cursor blinking */
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setInterval(function() {
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cursor.a = !cursor.a;
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if (cursor.hidden) {
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cursor.a = false;
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}
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if (!cursor.suppress) {
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blit(cursorCell(), cursor.a);
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}
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}, 500);
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load(obj);
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}
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// publish
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window.Term = {
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init: init,
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load: load,
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setCursor: cursorSet,
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enableCursor: cursorEnable,
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clear: cls
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};
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})();
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//
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// Connection class
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//
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(function() {
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var wsUri = "ws://"+window.location.host+"/ws/update.cgi";
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var ws;
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function onOpen(evt) {
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console.log("CONNECTED");
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}
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function onClose(evt) {
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console.error("SOCKET CLOSED");
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}
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function onMessage(evt) {
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try {
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console.log("RX: ", evt.data);
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// Assume all our messages are screen updates
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Term.load(JSON.parse(evt.data));
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} catch(e) {
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console.error(e);
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}
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}
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function onError(evt) {
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console.error(evt.data);
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}
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function doSend(message) {
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if (typeof message != "string") {
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message = JSON.stringify(message);
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}
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ws.send(message);
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}
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function init() {
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ws = new WebSocket(wsUri);
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ws.onopen = onOpen;
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ws.onclose = onClose;
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ws.onmessage = onMessage;
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ws.onerror = onError;
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console.log("Opening socket.");
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}
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window.Conn = {
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ws: null,
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init: init,
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send: doSend
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};
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})();
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function init(obj) {
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Term.init(obj);
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Conn.init();
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}
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