extension/packages/vim.coffee

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