extension/lib/vim.coffee

   1 ###
   2 # Copyright Anton Khodakivskiy 2012, 2013.
   3 # Copyright Simon Lydell 2013, 2014.
   4 #
   5 # This file is part of VimFx.
   6 #
   7 # VimFx is free software: you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation, either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # VimFx is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with VimFx.  If not, see <http://www.gnu.org/licenses/>.
  19 ###
  20
  21 utils = require('./utils')
  22 modes = require('./modes')
  23
  24 module.exports = class Vim
  25   constructor: (@window) ->
  26     @rootWindow = utils.getRootWindow(@window) # For convenience.
  27     @storage = {}
  28     @resetState()
  29     @enterMode('normal')
  30
  31   resetState: ->
  32     @state =
  33       blacklisted: false
  34       blacklistedKeys: null
  35       lastInteraction: null
  36       lastAutofocusPrevention: null
  37       scrollableElements: new WeakMap()
  38       largestScrollableElement: null
  39       lastFocusedTextInput: null
  40
  41   enterMode: (mode, args...) ->
  42     # `args` is an array of arguments to be passed to the mode's `onEnter`
  43     # method.
  44
  45     if mode not of modes
  46       throw new Error("Not a valid VimFx mode to enter: #{ mode }")
  47
  48     if @mode != mode
  49       if @mode of modes
  50         @call('onLeave')
  51
  52       @mode = mode
  53
  54       @call('onEnter', args...)
  55
  56   onInput: (keyStr, event) ->
  57     suppress = @call('onInput', keyStr, event)
  58     return suppress
  59
  60   call: (method, args...) ->
  61     currentMode = modes[@mode]
  62     currentMode?[method].call(currentMode, this, @storage[@mode] ?= {}, args...)