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   keypress: (key) ->
  18     @keys.push key
  19     if command = _getCommand(@mode, @keys)
  20       command @
  21       @keys = []
  22       return key != 'Esc'
  23     else if _maybeCommand(@mode, @keys)
  24       return true
  25     else
  26       @keys.pop()
  27       return false
  28
  29   enterHintsMode: () ->
  30     @mode = MODE_HINTS
  31
  32   enterNormalMode: () ->
  33     @markers = @cb = undefined
  34
  35     @mode = MODE_NORMAL
  36
  37 _endsWithEsc = (keys) ->
  38   return keys.join(',').match(/Esc$/)
  39
  40 _getCommand = (mode, keys) ->
  41   if mode == MODE_NORMAL or _endsWithEsc(keys)
  42     sequence = keys.join(',')
  43     if command = commands[sequence]
  44       return command
  45     else if keys.length > 0
  46       return _getCommand mode, keys.slice(1)
  47
  48   else if mode == MODE_HINTS
  49     return (vim) =>
  50       char = keys[keys.length - 1].toLowerCase()
  51       return hintCharHandler(vim, char)
  52
  53   return undefined
  54
  55 _maybeCommand = (mode, keys) ->
  56   if mode == MODE_NORMAL and keys.length > 0
  57     sequence = keys.join(',')
  58     for commandSequence in Object.keys(commands)
  59       if commandSequence.search(sequence) == 0
  60         return true
  61
  62     return _maybeCommand mode, keys.slice(1)
  63
  64   return false
  65
  66 exports.Vim = Vim