index.js

import { isKeyHotkey } from 'is-hotkey'
import { IS_IOS, IS_MAC } from 'slate-dev-environment'

/**
 * Hotkey mappings for each platform.
 *
 * @type {Object}
 */

const HOTKEYS = {
  bold: 'mod+b',
  compose: ['down', 'left', 'right', 'up', 'backspace', 'enter'],
  moveBackward: 'left',
  moveForward: 'right',
  moveWordBackward: 'ctrl+left',
  moveWordForward: 'ctrl+right',
  deleteBackward: 'shift?+backspace',
  deleteForward: 'shift?+delete',
  extendBackward: 'shift+left',
  extendForward: 'shift+right',
  italic: 'mod+i',
  splitBlock: 'shift?+enter',
  undo: 'mod+z',
}

const APPLE_HOTKEYS = {
  moveLineBackward: 'opt+up',
  moveLineForward: 'opt+down',
  moveWordBackward: 'opt+left',
  moveWordForward: 'opt+right',
  deleteBackward: ['ctrl+backspace', 'ctrl+h'],
  deleteForward: ['ctrl+delete', 'ctrl+d'],
  deleteLineBackward: 'cmd+shift?+backspace',
  deleteLineForward: ['cmd+shift?+delete', 'ctrl+k'],
  deleteWordBackward: 'opt+shift?+backspace',
  deleteWordForward: 'opt+shift?+delete',
  extendLineBackward: 'opt+shift+up',
  extendLineForward: 'opt+shift+down',
  redo: 'cmd+shift+z',
  transposeCharacter: 'ctrl+t',
}

const WINDOWS_HOTKEYS = {
  deleteWordBackward: 'ctrl+shift?+backspace',
  deleteWordForward: 'ctrl+shift?+delete',
  redo: 'ctrl+y',
}

/**
 * Hotkeys.
 *
 * @type {Object}
 */

const Hotkeys = {}

const IS_APPLE = IS_IOS || IS_MAC
const IS_WINDOWS = !IS_APPLE
const KEYS = []
  .concat(Object.keys(HOTKEYS))
  .concat(Object.keys(APPLE_HOTKEYS))
  .concat(Object.keys(WINDOWS_HOTKEYS))

KEYS.forEach(key => {
  const method = `is${key[0].toUpperCase()}${key.slice(1)}`
  if (Hotkeys[method]) return

  const generic = HOTKEYS[key]
  const apple = APPLE_HOTKEYS[key]
  const windows = WINDOWS_HOTKEYS[key]

  const isGeneric = generic && isKeyHotkey(generic)
  const isApple = apple && isKeyHotkey(apple)
  const isWindows = windows && isKeyHotkey(windows)

  Hotkeys[method] = event => {
    if (isGeneric && isGeneric(event)) return true
    if (IS_APPLE && isApple && isApple(event)) return true
    if (IS_WINDOWS && isWindows && isWindows(event)) return true
    return false
  }
})

/**
 * Export.
 *
 * @type {Object}
 */

export default Hotkeys