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     console.log @keys.join(',')
  26     if command = _getCommand(@mode, @keys)
  27       lastKey = @keys[@keys.length - 1]
  28       command @
  29       @keys = []
  30       return lastKey != 'Esc'
  31
  32   enterHintsMode: () ->
  33     @mode = MODE_HINTS
  34
  35   enterNormalMode: () ->
  36     @markers = @cb = undefined
  37
  38     @mode = MODE_NORMAL
  39
  40 _getCommand = (mode, keys) ->
  41   lastKey = keys[keys.length - 1]
  42
  43   if mode == MODE_NORMAL or lastKey == 'Esc'
  44     sequence = keys.join(',')
  45     if command = commands[sequence]
  46       return command
  47     else if keys.length > 0
  48       return _getCommand mode, keys.slice(1)
  49
  50   else if mode == MODE_HINTS and keys.length > 0
  51     # `lastKey` should be one hint chars or `Backspace`
  52     hintChars = getPref('hint_chars') + 'backspace'
  53     if hintChars.search(lastKey.toLowerCase()) > -1
  54       return (vim) =>
  55         return hintCharHandler(vim, lastKey.toLowerCase())
  56
  57   return undefined
  58
  59 _maybeCommand = (mode, keys, keyStr) ->
  60   if mode == MODE_NORMAL || keyStr == 'Esc'
  61     sequence = keys.concat([keyStr]).join(',')
  62     for commandSequence in Object.keys(commands)
  63       if commandSequence.search(sequence) == 0
  64         return true
  65
  66     if keys.length > 0
  67       return _maybeCommand mode, keys.slice(1), keyStr
  68
  69   else if mode == MODE_HINTS
  70     return true
  71
  72   return false
  73
  74 exports.Vim = Vim