File size: 4,106 Bytes
4b876a7 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | class KeymapManager {
constructor () {
document.addEventListener('keydown', this, false)
document.addEventListener('keyup', this, false)
window.addEventListener('blur', this, false)
this.commands = {}
this.pressed = []
this.translate = {}
this.translate['plus'] = '+'
this.translate['up'] = 'arrowup'
this.translate['down'] = 'arrowdown'
this.translate['return'] = 'enter'
}
get metaPressed () {
return this.pressed.includes('meta')
}
get ctrlPressed () {
return this.pressed.includes('control')
}
get shiftPressed () {
return this.pressed.includes('shift')
}
get altPressed () {
return this.pressed.includes('alt')
}
get cmdOrCtrlPressed () {
return process.platform === 'darwin' ? this.metaPressed : this.ctrlPressed
}
get OnlyCmdOrCtrlPressed () {
return this.cmdOrCtrlPressed && donkey.keys.pressedTotal <= 1
}
get pressedTotal () {
return this.pressed.length
}
register (accelerator, command) {
this.commands[accelerator] = command
}
clear () {
this.pressed = []
}
removePressedKey (key) {
var i = this.pressed.indexOf(key.toLowerCase())
this.pressed.splice(i, 1)
}
isModifier (key) {
return key === 'meta' || key === 'alt' || key === 'shift' || key === 'control'
}
checkCommands () {
// remove all shortcuts that do not meet the mdoifer requirements
// this will prevent Ctrl + C from firing if Ctrl + Shift + C is pressed
var shortcuts = Object.keys(this.commands)
for (var j = 0; j < shortcuts.length; j++) {
var shortcut = shortcuts[j].toLowerCase()
if (this.altPressed && !shortcut.includes('alt') || this.shiftPressed && !shortcut.includes('shift')) {
shortcuts.splice(j, 1)
j--
}
}
var commandExecuted = false
for (j = 0; j < shortcuts.length; j++) {
var accelerator = shortcuts[j]
var cmdOrCtrlRequired = false
var keyString = accelerator
if (accelerator.includes('CommandOrControl')) {
cmdOrCtrlRequired = true
keyString = accelerator.replace('CommandOrControl+', '')
}
if (accelerator.includes('CmdOrCtrl')) {
cmdOrCtrlRequired = true
keyString = accelerator.replace('CmdOrCtrl+', '')
}
if (cmdOrCtrlRequired && !this.cmdOrCtrlPressed) {
break
}
var requiredKeys = keyString.toLowerCase().split('+')
for (var identifer in this.translate) {
var index = requiredKeys.indexOf(identifer)
if (index >= 0) {
requiredKeys[index] = this.translate[identifer]
}
}
var requiredKeysPressed = true
for (var i = 0; i < requiredKeys.length; i++) {
if (!this.pressed.includes(requiredKeys[i])) {
requiredKeysPressed = false
}
}
if (requiredKeysPressed) {
donkey.commands.exec(this.commands[accelerator])
commandExecuted = true
for (i = 0; i < requiredKeys.length; i++) {
if (!this.isModifier(requiredKeys[i])) {
this.removePressedKey(requiredKeys[i])
}
}
}
}
return commandExecuted
}
handleEvent (e) {
switch (e.type) {
case 'keydown':
this.onKeyDown(e)
break
case 'keyup':
this.onKeyUp(e)
break
case 'blur':
this.onBlur(e)
break
}
}
onKeyDown (e) {
var key = e.key.toLowerCase()
if (this.pressed.indexOf(key) < 0) {
this.pressed.push(key)
}
if (this.checkCommands()) {
e.preventDefault()
}
}
onKeyUp (e) {
var key = e.key.toLowerCase()
var i = this.pressed.indexOf(key)
while (i >= 0) {
this.pressed.splice(i, 1)
i = this.pressed.indexOf(key)
}
// OSX workaround
// Sadly because holding CMD on osx does not trigger keyup events for other keys
// all keys have to be cleared
if (process.platform === 'darwin' && e.key.toLowerCase() === 'meta') {
this.clear()
}
}
onBlur (e) {
this.clear()
}
}
module.exports = KeymapManager
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