const $ = require('./lib/chibi') const { encode2B } = require('./utils') /** * User input * * --- Rx messages: --- * S - screen content (binary encoding of the entire screen with simple compression) * T - text labels - Title and buttons, \0x01-separated * B - beep * . - heartbeat * * --- Tx messages --- * s - string * b - action button * p - mb press * r - mb release * m - mouse move */ module.exports = function (conn, screen) { // handle for input object let input const KEY_NAMES = { 0x03: 'Cancel', 0x06: 'Help', 0x08: 'Backspace', 0x09: 'Tab', 0x0C: 'Clear', 0x0D: 'Enter', 0x10: 'Shift', 0x11: 'Control', 0x12: 'Alt', 0x13: 'Pause', 0x14: 'CapsLock', 0x1B: 'Escape', 0x20: ' ', 0x21: 'PageUp', 0x22: 'PageDown', 0x23: 'End', 0x24: 'Home', 0x25: 'ArrowLeft', 0x26: 'ArrowUp', 0x27: 'ArrowRight', 0x28: 'ArrowDown', 0x29: 'Select', 0x2A: 'Print', 0x2B: 'Execute', 0x2C: 'PrintScreen', 0x2D: 'Insert', 0x2E: 'Delete', 0x3A: ':', 0x3B: ';', 0x3C: '<', 0x3D: '=', 0x3E: '>', 0x3F: '?', 0x40: '@', 0x5B: 'Meta', 0x5C: 'Meta', 0x5D: 'ContextMenu', 0x6A: 'Numpad*', 0x6B: 'Numpad+', 0x6D: 'Numpad-', 0x6E: 'Numpad.', 0x6F: 'Numpad/', 0x90: 'NumLock', 0x91: 'ScrollLock', 0xA0: '^', 0xA1: '!', 0xA2: '"', 0xA3: '#', 0xA4: '$', 0xA5: '%', 0xA6: '&', 0xA7: '_', 0xA8: '(', 0xA9: ')', 0xAA: '*', 0xAB: '+', 0xAC: '|', 0xAD: '-', 0xAE: '{', 0xAF: '}', 0xB0: '~', 0xBA: ';', 0xBB: '=', 0xBC: 'Numpad,', 0xBD: '-', 0xBE: 'Numpad,', 0xC0: '`', 0xC2: 'Numpad,', 0xDB: '[', 0xDC: '\\', 0xDD: ']', 0xDE: "'", 0xE0: 'Meta' } // numbers 0-9 for (let i = 0x30; i <= 0x39; i++) KEY_NAMES[i] = String.fromCharCode(i) // characters A-Z for (let i = 0x41; i <= 0x5A; i++) KEY_NAMES[i] = String.fromCharCode(i) // function F1-F20 for (let i = 0x70; i <= 0x83; i++) KEY_NAMES[i] = `F${i - 0x70 + 1}` // numpad 0-9 for (let i = 0x60; i <= 0x69; i++) KEY_NAMES[i] = `Numpad${i - 0x60}` let cfg = { np_alt: false, cu_alt: false, fn_alt: false, mt_click: false, mt_move: false, no_keys: false, crlf_mode: false, all_fn: false } /** Fn alt choice for key message */ const fa = (alt, normal) => cfg.fn_alt ? alt : normal /** Cursor alt choice for key message */ const ca = (alt, normal) => cfg.cu_alt ? alt : normal /** Numpad alt choice for key message */ const na = (alt, normal) => cfg.np_alt ? alt : normal const keymap = { /* eslint-disable key-spacing */ 'Backspace': '\x08', 'Tab': '\x09', 'Enter': () => cfg.crlf_mode ? '\x0d\x0a' : '\x0d', 'Control+Enter': '\x0a', 'Escape': '\x1b', 'ArrowUp': () => ca('\x1bOA', '\x1b[A'), 'ArrowDown': () => ca('\x1bOB', '\x1b[B'), 'ArrowRight': () => ca('\x1bOC', '\x1b[C'), 'ArrowLeft': () => ca('\x1bOD', '\x1b[D'), 'Home': () => ca('\x1bOH', fa('\x1b[H', '\x1b[1~')), 'Insert': '\x1b[2~', 'Delete': '\x1b[3~', 'End': () => ca('\x1bOF', fa('\x1b[F', '\x1b[4~')), 'PageUp': '\x1b[5~', 'PageDown': '\x1b[6~', 'F1': () => fa('\x1bOP', '\x1b[11~'), 'F2': () => fa('\x1bOQ', '\x1b[12~'), 'F3': () => fa('\x1bOR', '\x1b[13~'), 'F4': () => fa('\x1bOS', '\x1b[14~'), 'F5': '\x1b[15~', // note the disconnect 'F6': '\x1b[17~', 'F7': '\x1b[18~', 'F8': '\x1b[19~', 'F9': '\x1b[20~', 'F10': '\x1b[21~', // note the disconnect 'F11': '\x1b[23~', 'F12': '\x1b[24~', 'Shift+F1': () => fa('\x1bO1;2P', '\x1b[25~'), 'Shift+F2': () => fa('\x1bO1;2Q', '\x1b[26~'), // note the disconnect 'Shift+F3': () => fa('\x1bO1;2R', '\x1b[28~'), 'Shift+F4': () => fa('\x1bO1;2S', '\x1b[29~'), // note the disconnect 'Shift+F5': () => fa('\x1b[15;2~', '\x1b[31~'), 'Shift+F6': () => fa('\x1b[17;2~', '\x1b[32~'), 'Shift+F7': () => fa('\x1b[18;2~', '\x1b[33~'), 'Shift+F8': () => fa('\x1b[19;2~', '\x1b[34~'), 'Shift+F9': () => fa('\x1b[20;2~', '\x1b[35~'), // 35-38 are not standard - but what is? 'Shift+F10': () => fa('\x1b[21;2~', '\x1b[36~'), 'Shift+F11': () => fa('\x1b[22;2~', '\x1b[37~'), 'Shift+F12': () => fa('\x1b[23;2~', '\x1b[38~'), 'Numpad0': () => na('\x1bOp', '0'), 'Numpad1': () => na('\x1bOq', '1'), 'Numpad2': () => na('\x1bOr', '2'), 'Numpad3': () => na('\x1bOs', '3'), 'Numpad4': () => na('\x1bOt', '4'), 'Numpad5': () => na('\x1bOu', '5'), 'Numpad6': () => na('\x1bOv', '6'), 'Numpad7': () => na('\x1bOw', '7'), 'Numpad8': () => na('\x1bOx', '8'), 'Numpad9': () => na('\x1bOy', '9'), 'Numpad*': () => na('\x1bOR', '*'), 'Numpad+': () => na('\x1bOl', '+'), 'Numpad-': () => na('\x1bOS', '-'), 'Numpad.': () => na('\x1bOn', '.'), 'Numpad/': () => na('\x1bOQ', '/'), // we don't implement numlock key (should change in numpad_alt mode, // but it's even more useless than the rest and also has the side // effect of changing the user's numlock state) // shortcuts 'Control+]': '\x1b', // alternate way to enter ESC 'Control+\\': '\x1c', 'Control+[': '\x1d', 'Control+^': '\x1e', 'Control+_': '\x1f', // extra controls 'Control+ArrowLeft': '\x1f[1;5D', 'Control+ArrowRight': '\x1f[1;5C', 'Control+ArrowUp': '\x1f[1;5A', 'Control+ArrowDown': '\x1f[1;5B', 'Control+Home': '\x1f[1;5H', 'Control+End': '\x1f[1;5F', // extra shift controls 'Shift+ArrowLeft': '\x1f[1;2D', 'Shift+ArrowRight': '\x1f[1;2C', 'Shift+ArrowUp': '\x1f[1;2A', 'Shift+ArrowDown': '\x1f[1;2B', 'Shift+Home': '\x1f[1;2H', 'Shift+End': '\x1f[1;2F', // macOS text editing commands 'Alt+ArrowLeft': '\x1bb', // ⌥← to go back a word (^[b) 'Alt+ArrowRight': '\x1bf', // ⌥→ to go forward one word (^[f) 'Meta+ArrowLeft': '\x01', // ⌘← to go to the beginning of a line (^A) 'Meta+ArrowRight': '\x05', // ⌘→ to go to the end of a line (^E) 'Alt+Backspace': '\x17', // ⌥⌫ to delete a word (^W) 'Meta+Backspace': '\x15', // ⌘⌫ to delete to the beginning of a line (^U) // copy to clipboard 'Control+Shift+C' () { screen.copySelectionToClipboard() } /* eslint-enable key-spacing */ } // ctrl+[A-Z] sent as simple low ASCII codes for (let i = 1; i <= 26; i++) keymap[`Control+${String.fromCharCode(0x40 + i)}`] = String.fromCharCode(i) /** Send a literal message */ function sendString (str) { return conn.send('s' + str) } /** Send a button event */ function sendButton (n) { conn.send('b' + String.fromCharCode(n)) } const keyBlacklist = [ 'F5', 'F11', 'F12', 'Shift+F5' ] const handleKeyDown = function (e) { if (cfg.no_keys) return let modifiers = [] // sorted alphabetically if (e.altKey) modifiers.push('Alt') if (e.ctrlKey) modifiers.push('Control') if (e.metaKey) modifiers.push('Meta') if (e.shiftKey) modifiers.push('Shift') let key = KEY_NAMES[e.which] || e.key // ignore clipboard events if ((e.ctrlKey || e.metaKey) && key === 'V') return let binding = null for (let name in keymap) { let itemModifiers = name.split('+') let itemKey = itemModifiers.pop() if (itemKey === key && itemModifiers.sort().join() === modifiers.join()) { if (keyBlacklist.includes(name) && !cfg.all_fn) continue binding = keymap[name] break } } if (binding) { if (binding instanceof Function) binding = binding() e.preventDefault() if (typeof binding === 'string') { sendString(binding) } } } /** Bind/rebind key messages */ function initKeys ({ allFn }) { // This takes care of text characters typed window.addEventListener('keypress', function (evt) { if (cfg.no_keys) return if (evt.ctrlKey || evt.metaKey) return let str = '' if (evt.key && evt.key.length === 1) str = evt.key else if (evt.which && evt.which !== 229) str = String.fromCodePoint(evt.which) if (str.length > 0 && str.charCodeAt(0) >= 32) { // prevent space from scrolling if (evt.which === 32) evt.preventDefault() sendString(str) } }) window.addEventListener('keydown', handleKeyDown) window.addEventListener('copy', e => { let selectedText = screen.getSelectedText() if (selectedText) { e.preventDefault() e.clipboardData.setData('text/plain', selectedText) } }) window.addEventListener('paste', e => { e.preventDefault() let string = e.clipboardData.getData('text/plain') if (string.includes('\n') || string.length > 90) { if (!input.termUpload) console.error('input.termUpload is undefined') input.termUpload.setContent(string) input.termUpload.open() } else { // simple string, just paste it if (screen.bracketedPaste) string = `\x1b[200~${string}\x1b[201~` sendString(string) } }) cfg.all_fn = allFn } // mouse button states let mb1 = 0 let mb2 = 0 let mb3 = 0 /** Init the Input module */ function init (opts) { initKeys(opts) // Button presses $('#action-buttons button').forEach(s => { s.addEventListener('click', function (evt) { sendButton(+this.dataset['n']) }) }) // global mouse state tracking - for motion reporting window.addEventListener('mousedown', evt => { if (evt.button === 0) mb1 = 1 if (evt.button === 1) mb2 = 1 if (evt.button === 2) mb3 = 1 }) window.addEventListener('mouseup', evt => { if (evt.button === 0) mb1 = 0 if (evt.button === 1) mb2 = 0 if (evt.button === 2) mb3 = 0 }) } // record modifier keys // bits: Meta, Alt, Shift, Ctrl let modifiers = 0b0000 window.addEventListener('keydown', e => { if (e.ctrlKey) modifiers |= 1 if (e.shiftKey) modifiers |= 2 if (e.altKey) modifiers |= 4 if (e.metaKey) modifiers |= 8 }) window.addEventListener('keyup', e => { modifiers = 0 if (e.ctrlKey) modifiers |= 1 if (e.shiftKey) modifiers |= 2 if (e.altKey) modifiers |= 4 if (e.metaKey) modifiers |= 8 }) /** Prepare modifiers byte for mouse message */ function packModifiersForMouse () { return modifiers } input = { /** Init the Input module */ init, /** Send a literal string message */ sendString, /** Enable alternate key modes (cursors, numpad, fn) */ setAlts: function (cu, np, fn, crlf) { if (cfg.cu_alt !== cu || cfg.np_alt !== np || cfg.fn_alt !== fn || cfg.crlf_mode !== crlf) { cfg.cu_alt = cu cfg.np_alt = np cfg.fn_alt = fn cfg.crlf_mode = crlf } }, setMouseMode (click, move) { cfg.mt_click = click cfg.mt_move = move }, // Mouse events onMouseMove (x, y) { if (!cfg.mt_move) return const b = mb1 ? 1 : mb2 ? 2 : mb3 ? 3 : 0 const m = packModifiersForMouse() conn.send('m' + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m)) }, onMouseDown (x, y, b) { if (!cfg.mt_click) return if (b > 3 || b < 1) return const m = packModifiersForMouse() conn.send('p' + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m)) }, onMouseUp (x, y, b) { if (!cfg.mt_click) return if (b > 3 || b < 1) return const m = packModifiersForMouse() conn.send('r' + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m)) // console.log("B ",b," M ",m); }, onMouseWheel (x, y, dir) { if (!cfg.mt_click) return // -1 ... btn 4 (away from user) // +1 ... btn 5 (towards user) const m = packModifiersForMouse() const b = (dir < 0 ? 4 : 5) conn.send('p' + encode2B(y) + encode2B(x) + encode2B(b) + encode2B(m)) // console.log("B ",b," M ",m); }, /** * Prevent capturing keys. This is used for text input * modals on the terminal screen */ blockKeys (yes) { cfg.no_keys = yes } } return input }