packages/hints.coffee

   1 HINTCHARS     = 'asdfghjkl;'
   2 CONTAINER_ID  = 'vimffHintMarkerContainer'
   3
   4 { interfaces: Ci }          = Components
   5 HTMLDocument                = Ci.nsIDOMHTMLDocument
   6 { Marker, getElementRect }  = require 'marker'
   7
   8 indexToHint = (i, chars) ->
   9   return '' if i < 0
  10
  11   n = chars.length
  12   l = Math.floor(i / n); k = i % n;
  13
  14   return indexToHint(l - 1, chars) + chars[k]
  15
  16 hintToIndex = (hint, chars) ->
  17   return -1 if hint.length < 1
  18
  19   n = chars.length; m = hint.length
  20
  21   i = chars.indexOf(hint[m - 1])
  22   if hint.length > 1
  23     base = hintToIndex(hint.slice(0, m - 1), chars)
  24     i += (base + 1) * n
  25
  26   return i
  27
  28 getHintsContainer = (document) ->
  29   document.getElementById CONTAINER_ID
  30
  31 createHintsContainer = (document) ->
  32   container = document.createElement 'div'
  33   container.id = CONTAINER_ID
  34   return container
  35
  36 hasHints = (document) ->
  37   document.getUserData 'vimff.has_hints'
  38
  39 addHints = (document, cb) ->
  40   if hasHints document
  41     removeHints document
  42
  43   if document instanceof HTMLDocument
  44     container = createHintsContainer document
  45
  46     start = new Date().getTime()
  47
  48     markers = {}; i = 0;
  49     for link in document.links
  50       if rect = getElementRect link
  51         hint = indexToHint(i++, HINTCHARS)
  52         marker = new Marker(link, container)
  53         marker.setPosition rect
  54         marker.setHint hint
  55         markers[hint] = marker
  56
  57     console.log new Date().getTime() - start, 'aaaaa'
  58
  59     document.setUserData 'vimff.has_hints', true, null
  60     document.setUserData 'vimff.markers', markers, null
  61
  62     document.body.appendChild container
  63
  64 removeHints = (document) ->
  65   console.log hasHints document
  66   if hasHints document
  67     document.setUserData 'vimff.has_hints', undefined, null
  68     document.setUserData 'vimff.markers', undefined, null
  69
  70     document.body.removeChild container if container = getHintsContainer document
  71
  72 exports.addHints    = addHints
  73 exports.removeHints = removeHints
  74 exports.hasHints    = removeHints