extension/packages/hints.coffee

   1 CONTAINER_ID  = 'VimFxHintMarkerContainer'
   2
   3 { interfaces: Ci }  = Components
   4 HTMLDocument        = Ci.nsIDOMHTMLDocument
   5 { Marker }          = require 'marker'
   6
   7 createHintsContainer = (document) ->
   8   container = document.createElement 'div'
   9   container.id = CONTAINER_ID
  10   container.className = 'VimFxReset'
  11   return container
  12
  13 # Creates and injects hint markers into the DOM
  14 injectHints = (document) ->
  15   # First remove previous hints container
  16   removeHints document
  17
  18   if document instanceof HTMLDocument and document.documentElement
  19     # Find and create markers
  20     markers = Marker.createMarkers document
  21
  22     container = createHintsContainer document
  23
  24     # For performance use Document Fragment
  25     fragment = document.createDocumentFragment()
  26     for marker in markers
  27       fragment.appendChild marker.markerElement
  28
  29     container.appendChild fragment
  30     document.documentElement.appendChild container
  31
  32     return markers
  33
  34 # Remove previously injected hints from the DOM
  35 removeHints = (document, markers) ->
  36   if container = document.getElementById CONTAINER_ID
  37     document.documentElement.removeChild container
  38
  39
  40 exports.injectHints     = injectHints
  41 exports.removeHints     = removeHints