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264 lines
6.8 KiB
264 lines
6.8 KiB
/**
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* User input
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*
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* --- Rx messages: ---
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* S - screen content (binary encoding of the entire screen with simple compression)
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* T - text labels - Title and buttons, \0x01-separated
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* B - beep
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* . - heartbeat
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*
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* --- Tx messages ---
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* s - string
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* b - action button
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* p - mb press
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* r - mb release
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* m - mouse move
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*/
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var Input = (function() {
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var opts = {
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np_alt: false,
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cu_alt: false,
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fn_alt: false,
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mt_click: false,
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mt_move: false,
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no_keys: false,
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};
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/** Send a literal message */
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function sendStrMsg(str) {
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return Conn.send("s"+str);
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}
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/** Send a button event */
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function sendBtnMsg(n) {
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Conn.send("b"+Chr(n));
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}
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/** Fn alt choice for key message */
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function fa(alt, normal) {
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return opts.fn_alt ? alt : normal;
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}
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/** Cursor alt choice for key message */
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function ca(alt, normal) {
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return opts.cu_alt ? alt : normal;
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}
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/** Numpad alt choice for key message */
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function na(alt, normal) {
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return opts.np_alt ? alt : normal;
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}
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function _bindFnKeys() {
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var keymap = {
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'tab': '\x09',
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'backspace': '\x08',
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'enter': '\x0d',
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'ctrl+enter': '\x0a',
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'esc': '\x1b',
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'up': ca('\x1bOA', '\x1b[A'),
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'down': ca('\x1bOB', '\x1b[B'),
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'right': ca('\x1bOC', '\x1b[C'),
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'left': ca('\x1bOD', '\x1b[D'),
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'home': ca('\x1bOH', fa('\x1b[H', '\x1b[1~')),
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'insert': '\x1b[2~',
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'delete': '\x1b[3~',
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'end': ca('\x1bOF', fa('\x1b[F', '\x1b[4~')),
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'pageup': '\x1b[5~',
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'pagedown': '\x1b[6~',
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'f1': fa('\x1bOP', '\x1b[11~'),
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'f2': fa('\x1bOQ', '\x1b[12~'),
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'f3': fa('\x1bOR', '\x1b[13~'),
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'f4': fa('\x1bOS', '\x1b[14~'),
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'f5': '\x1b[15~', // note the disconnect
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'f6': '\x1b[17~',
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'f7': '\x1b[18~',
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'f8': '\x1b[19~',
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'f9': '\x1b[20~',
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'f10': '\x1b[21~', // note the disconnect
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'f11': '\x1b[23~',
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'f12': '\x1b[24~',
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'shift+f1': fa('\x1bO1;2P', '\x1b[25~'),
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'shift+f2': fa('\x1bO1;2Q', '\x1b[26~'), // note the disconnect
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'shift+f3': fa('\x1bO1;2R', '\x1b[28~'),
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'shift+f4': fa('\x1bO1;2S', '\x1b[29~'), // note the disconnect
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'shift+f5': fa('\x1b[15;2~', '\x1b[31~'),
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'shift+f6': fa('\x1b[17;2~', '\x1b[32~'),
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'shift+f7': fa('\x1b[18;2~', '\x1b[33~'),
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'shift+f8': fa('\x1b[19;2~', '\x1b[34~'),
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'shift+f9': fa('\x1b[20;2~', '\x1b[35~'), // 35-38 are not standard - but what is?
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'shift+f10': fa('\x1b[21;2~', '\x1b[36~'),
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'shift+f11': fa('\x1b[22;2~', '\x1b[37~'),
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'shift+f12': fa('\x1b[23;2~', '\x1b[38~'),
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'np_0': na('\x1bOp', '0'),
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'np_1': na('\x1bOq', '1'),
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'np_2': na('\x1bOr', '2'),
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'np_3': na('\x1bOs', '3'),
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'np_4': na('\x1bOt', '4'),
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'np_5': na('\x1bOu', '5'),
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'np_6': na('\x1bOv', '6'),
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'np_7': na('\x1bOw', '7'),
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'np_8': na('\x1bOx', '8'),
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'np_9': na('\x1bOy', '9'),
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'np_mul': na('\x1bOR', '*'),
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'np_add': na('\x1bOl', '+'),
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'np_sub': na('\x1bOS', '-'),
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'np_point': na('\x1bOn', '.'),
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'np_div': na('\x1bOQ', '/'),
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// we don't implement numlock key (should change in numpad_alt mode, but it's even more useless than the rest)
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};
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for (var k in keymap) {
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if (keymap.hasOwnProperty(k)) {
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bind(k, keymap[k]);
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}
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}
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}
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/** Bind a keystroke to message */
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function bind(combo, str) {
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// mac fix - allow also cmd
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if (combo.indexOf('ctrl+') !== -1) {
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combo += ',' + combo.replace('ctrl', 'command');
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}
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// unbind possible old binding
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key.unbind(combo);
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key(combo, function (e) {
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if (opts.no_keys) return;
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e.preventDefault();
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sendStrMsg(str)
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});
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}
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/** Bind/rebind key messages */
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function _initKeys() {
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// This takes care of text characters typed
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window.addEventListener('keypress', function(evt) {
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if (opts.no_keys) return;
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var str = '';
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if (evt.key) str = evt.key;
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else if (evt.which) str = String.fromCodePoint(evt.which);
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if (str.length>0 && str.charCodeAt(0) >= 32) {
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// console.log("Typed ", str);
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// prevent space from scrolling
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if (evt.which === 32) evt.preventDefault();
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sendStrMsg(str);
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}
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});
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// ctrl-letter codes are sent as simple low ASCII codes
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for (var i = 1; i<=26;i++) {
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bind('ctrl+' + String.fromCharCode(96+i), String.fromCharCode(i));
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}
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bind('ctrl+]', '\x1b'); // alternate way to enter ESC
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bind('ctrl+\\', '\x1c');
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bind('ctrl+[', '\x1d');
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bind('ctrl+^', '\x1e');
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bind('ctrl+_', '\x1f');
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_bindFnKeys();
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}
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// mouse button states
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var mb1 = 0;
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var mb2 = 0;
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var mb3 = 0;
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/** Init the Input module */
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function init() {
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_initKeys();
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// Button presses
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$('#action-buttons button').forEach(function(s) {
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s.addEventListener('click', function() {
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sendBtnMsg(+this.dataset['n']);
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});
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});
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// global mouse state tracking - for motion reporting
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window.addEventListener('mousedown', function(evt) {
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if (evt.button == 0) mb1 = 1;
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if (evt.button == 1) mb2 = 1;
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if (evt.button == 2) mb3 = 1;
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});
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window.addEventListener('mouseup', function(evt) {
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if (evt.button == 0) mb1 = 0;
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if (evt.button == 1) mb2 = 0;
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if (evt.button == 2) mb3 = 0;
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});
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}
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/** Prepare modifiers byte for mouse message */
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function packModifiersForMouse() {
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return (key.isModifier('ctrl')?1:0) |
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(key.isModifier('shift')?2:0) |
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(key.isModifier('alt')?4:0) |
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(key.isModifier('meta')?8:0);
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}
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return {
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/** Init the Input module */
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init: init,
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/** Send a literal string message */
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sendString: sendStrMsg,
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/** Enable alternate key modes (cursors, numpad, fn) */
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setAlts: function(cu, np, fn) {
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if (opts.cu_alt != cu || opts.np_alt != np || opts.fn_alt != fn) {
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opts.cu_alt = cu;
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opts.np_alt = np;
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opts.fn_alt = fn;
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// rebind keys - codes have changed
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_bindFnKeys();
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}
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},
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setMouseMode: function(click, move) {
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opts.mt_click = click;
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opts.mt_move = move;
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},
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// Mouse events
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onMouseMove: function (x, y) {
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if (!opts.mt_move) return;
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var b = mb1 ? 1 : mb2 ? 2 : mb3 ? 3 : 0;
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var m = packModifiersForMouse();
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Conn.send("m" + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m));
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},
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onMouseDown: function (x, y, b) {
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if (!opts.mt_click) return;
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if (b > 3 || b < 1) return;
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var m = packModifiersForMouse();
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Conn.send("p" + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m));
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// console.log("B ",b," M ",m);
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},
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onMouseUp: function (x, y, b) {
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if (!opts.mt_click) return;
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if (b > 3 || b < 1) return;
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var m = packModifiersForMouse();
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Conn.send("r" + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m));
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// console.log("B ",b," M ",m);
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},
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onMouseWheel: function (x, y, dir) {
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if (!opts.mt_click) return;
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// -1 ... btn 4 (away from user)
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// +1 ... btn 5 (towards user)
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var m = packModifiersForMouse();
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var b = (dir < 0 ? 4 : 5);
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Conn.send("p" + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m));
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// console.log("B ",b," M ",m);
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},
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mouseTracksClicks: function() {
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return opts.mt_click;
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},
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blockKeys: function(yes) {
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opts.no_keys = yes;
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}
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};
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})();
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