extension/packages/hints.coffee

   1 { Marker }   = require 'marker'
   2
   3 { interfaces: Ci } = Components
   4
   5 HTMLDocument = Ci.nsIDOMHTMLDocument
   6 XULDocument  = Ci.nsIDOMXULDocument
   7
   8 CONTAINER_ID = 'VimFxHintMarkerContainer'
   9
  10 createHintsContainer = (document) ->
  11   container = document.createElement('div')
  12   container.id = CONTAINER_ID
  13   container.className = 'VimFxReset'
  14   return container
  15
  16 # Creates and injects hint markers into the DOM
  17 injectHints = (document) ->
  18
  19   inner = (document, startIndex = 1) ->
  20     # First remove previous hints container
  21     removeHints(document)
  22
  23     # For now we aren't able to handle hint markers in XUL Documents :(
  24     if document instanceof HTMLDocument# or document instanceof XULDocument
  25       if document.documentElement
  26         # Find and create markers
  27         markers = Marker.createMarkers(document, startIndex)
  28
  29         container = createHintsContainer(document)
  30
  31         # For performance use Document Fragment
  32         fragment = document.createDocumentFragment()
  33         for marker in markers
  34           fragment.appendChild(marker.markerElement)
  35
  36         container.appendChild(fragment)
  37         document.documentElement.appendChild(container)
  38
  39         for frame in document.defaultView.frames
  40           markers = markers.concat(inner(frame.document, markers.length+1))
  41
  42         return markers
  43
  44   return inner(document)
  45
  46 # Remove previously injected hints from the DOM
  47 removeHints = (document) ->
  48   if container = document.getElementById(CONTAINER_ID)
  49     document.documentElement.removeChild(container)
  50
  51   for frame in document.defaultView.frames
  52     removeHints(frame.document)
  53
  54
  55 exports.injectHints = injectHints
  56 exports.removeHints = removeHints