extension/packages/vim.coffee

   1 { getWindowId, Bucket } = require 'utils'
   2
   3 { commands,
   4   hintCharHandler } = require 'commands'
   5
   6 { getPref } = require 'prefs'
   7
   8
   9 MODE_NORMAL = 1
  10 MODE_HINTS  = 2
  11
  12 class Vim
  13   constructor: (@window) ->
  14     @mode     = MODE_NORMAL
  15     @keys     = []
  16     @markers  = undefined
  17     @cb       = undefined
  18
  19   pushKey: (keyStr) ->
  20     if _maybeCommand(@mode, @keys, keyStr)
  21       @keys.push keyStr
  22       return true
  23
  24     return false
  25
  26   execKeys: ->
  27     if command = _getCommand(@mode, @keys)
  28       lastKey = @keys[@keys.length - 1]
  29       command @
  30       @keys = []
  31       return lastKey != 'Esc'
  32
  33   enterHintsMode: () ->
  34     @mode = MODE_HINTS
  35
  36   enterNormalMode: () ->
  37     @markers = @cb = undefined
  38
  39     @mode = MODE_NORMAL
  40
  41 _getCommand = (mode, keys) ->
  42   lastKey = keys[keys.length - 1]
  43
  44   if mode == MODE_NORMAL or lastKey == 'Esc'
  45     sequence = keys.join(',')
  46     if command = commands[sequence]
  47       return command
  48     else if keys.length > 0
  49       return _getCommand mode, keys.slice(1)
  50
  51   else if mode == MODE_HINTS and keys.length > 0
  52     # `lastKey` should be one hint chars or `Backspace`
  53     hintChars = getPref('hint_chars').toLowerCase() + 'backspace'
  54     if hintChars.search(lastKey.toLowerCase()) > -1
  55       return (vim) =>
  56         return hintCharHandler(vim, lastKey.toLowerCase())
  57
  58   return undefined
  59
  60 _maybeCommand = (mode, keys, keyStr) ->
  61     if mode == MODE_NORMAL || keyStr == 'Esc'
  62       sequence = keys.concat([keyStr]).join(',')
  63       for commandSequence in Object.keys(commands)
  64         if commandSequence.indexOf(sequence) == 0
  65           return true
  66
  67       if keys.length > 0
  68         return _maybeCommand mode, keys.slice(1), keyStr
  69
  70     else if mode == MODE_HINTS
  71       hintChars = getPref('hint_chars').toLowerCase()
  72       return (hintChars.search keyStr != -1)
  73
  74     return false
  75
  76 exports.Vim = Vim