packages/event-handlers.coffee

   1 utils               = require 'utils'
   2 { getCommand }      = require 'commands'
   3 { Vim }             = require 'vim'
   4 { WindowTracker,
   5   isBrowserWindow } = require 'window-utils'
   6
   7 { interfaces: Ci } = Components
   8
   9 vimBucket = new utils.Bucket utils.getWindowId, (obj) -> new Vim obj
  10
  11 suppressEvent = (event) ->
  12   event.preventDefault()
  13   event.stopPropagation()
  14
  15 # The following handlers are installed on every top level DOM window
  16 handlers =
  17   'keypress': (event) ->
  18     try
  19       isEditable =  utils.isElementEditable event.originalTarget
  20       key = utils.keyboardEventKey event
  21
  22       # We only handle the key if there is no focused editable element
  23       # or if it's the *Esc* key, which will remote the focus from
  24       # the currently focused element
  25       if key and (key == 'Esc' or not isEditable)
  26         if window = utils.getEventTabWindow event
  27           if vimBucket.get(window)?.keypress key
  28             suppressEvent event
  29     catch err
  30       console.log err
  31
  32   'TabClose': (event) ->
  33     if gBrowser = utils.getEventTabBrowser event
  34       if browser = gBrowser.getBrowserForTab event.originalTarget
  35         vimBucket.forget browser.contentWindow.wrappedJSObject
  36
  37   'DOMWindowClose': (event) ->
  38     if gBrowser = event.originalTarget.gBrowser
  39       for tab in gBrowser.tabs
  40         if browser = gBrowser.getBrowserForTab tab
  41           vimBucket.forget browser.contentWindow.wrappedJSObject
  42
  43 # Delegate for WindowTracker that will add and remove event handlers
  44 # to the each window that goes through the tracker
  45 delegate =
  46   track: (window) ->
  47     if isBrowserWindow window
  48       for name, handler of handlers
  49         window.addEventListener name, handler, true
  50
  51   untrack: (window) ->
  52     if isBrowserWindow window
  53       for name, handler of handlers
  54         window.removeEventListener name, handler, true
  55
  56 # Creates and returns an instance of WindowTracker
  57 # that will attach the passed event handlers to
  58 # each opened top level window.
  59 createWindowEventTracker = -> new WindowTracker delegate
  60
  61 exports.createWindowEventTracker = createWindowEventTracker