extension/packages/vim.coffee

   1 utils               = require 'utils'
   2 { modes }           = require 'modes'
   3 { isEscCommandKey } = require 'commands'
   4
   5 class Vim
   6   constructor: (@window) ->
   7     @storage = {}
   8     @enterMode('normal')
   9
  10   enterMode: (mode, args) ->
  11     # `args` is an array of arguments to be passed to the mode's `onEnter` method
  12     if mode not of modes
  13       throw new Error("Not a valid VimFx mode to enter: #{ mode }")
  14
  15     if @mode != mode
  16       if @mode of modes
  17         modes[@mode].onLeave(@, @storage[@mode], args)
  18
  19       @mode = mode
  20
  21       modes[@mode].onEnter(@, @storage[@mode] ?= {}, args)
  22
  23   onInput: (keyStr, event) ->
  24     isEditable = utils.isElementEditable(event.originalTarget)
  25
  26     if isEditable and not isEscCommandKey(keyStr)
  27       return false
  28
  29     oldMode = @mode
  30
  31     suppress = modes[@mode]?.onInput(@, @storage[@mode], keyStr, event)
  32
  33     # Esc key is not suppressed, and passed to the browser in `normal` mode.
  34     # Here we compare against the mode that was active before the key was processed
  35     # because processing the command may change the mode.
  36     if oldMode == 'normal' and keyStr == 'Esc'
  37       return false
  38     else
  39       return suppress
  40
  41 exports.Vim = Vim