packages/utils.coffee

   1 { WindowTracker, isBrowserWindow } = require 'window-utils'
   2
   3
   4 class Bucket
   5   constructor: (@idFunc, @newFunc) ->
   6     @bucket = {}
   7
   8   get: (obj) ->
   9     id = @idFunc obj
  10     @bucket[id] or @bucket[id] = @newFunc obj
  11
  12   forget: (obj) ->
  13     id = @idFunc obj
  14     delete @bucket[id] if id
  15
  16
  17 class WindowEventTracker
  18   constructor: (events, eventFilter = null) ->
  19
  20     handlerFilter = (handler) ->
  21       return (event) ->
  22         if !eventFilter or eventFilter event
  23           handler event
  24
  25     addEventListeners = (window) ->
  26       for name, handler of events
  27         window.addEventListener name, handlerFilter(handler), true
  28
  29     removeEventListeners = (window) ->
  30       for name, handler of events
  31         window.removeEventListener name, handlerFilter(handler), true
  32
  33     @windowTracker = new WindowTracker
  34       track: (window) ->
  35         if isBrowserWindow window
  36           addEventListeners window
  37
  38       untrack: (window) ->
  39         if isBrowserWindow window
  40           removeEventListeners window
  41
  42   start: -> @windowTracker.start()
  43   stop: -> @windowTracker.stop()
  44
  45 { interfaces: Ci } = Components
  46
  47 HTMLInputElement    = Ci.nsIDOMHTMLInputElement
  48 HTMLTextAreaElement = Ci.nsIDOMHTMLTextAreaElement
  49 HTMLSelectElement   = Ci.nsIDOMHTMLSelectElement
  50 XULDocument         = Ci.nsIDOMXULDocument
  51 XULElement          = Ci.nsIDOMXULElement
  52 HTMLDocument        = Ci.nsIDOMHTMLDocument
  53 HTMLElement         = Ci.nsIDOMHTMLElement
  54 Window              = Ci.nsIDOMWindow
  55 ChromeWindow        = Ci.nsIDOMChromeWindow
  56
  57 isRootWindow = (window) ->
  58   window.location == "chrome://browser/content/browser.xul"
  59
  60 getEventWindow = (event) ->
  61   if event.originalTarget instanceof Window
  62     return event.originalTarget
  63   else
  64     doc = event.originalTarget.ownerDocument or event.originalTarget
  65     if doc instanceof HTMLDocument or doc instanceof XULDocument
  66       return doc.defaultView
  67
  68 getEventTabWindow = (event) ->
  69   if window = getEventWindow event
  70     if isRootWindow window
  71       return window.gBrowser.tabs.selectedItem?.contentWindow.wrappedJSObject
  72     else
  73       return window
  74
  75 getEventRootWindow = (event) ->
  76   if window = getEventWindow event
  77     return getRootWindow window
  78
  79 getEventTabBrowser = (event) ->
  80   cw.gBrowser if cw = getEventRootWindow event
  81
  82
  83 getRootWindow = (window) ->
  84   return window.QueryInterface(Ci.nsIInterfaceRequestor)
  85                .getInterface(Ci.nsIWebNavigation)
  86                .QueryInterface(Ci.nsIDocShellTreeItem)
  87                .rootTreeItem
  88                .QueryInterface(Ci.nsIInterfaceRequestor)
  89                .getInterface(Window);
  90
  91 isElementEditable = (element) ->
  92   return element.isContentEditable or \
  93          element instanceof HTMLInputElement or \
  94          element instanceof HTMLTextAreaElement or \
  95          element instanceof HTMLSelectElement
  96
  97 getWindowId = (window) ->
  98   return window.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
  99                .getInterface(Components.interfaces.nsIDOMWindowUtils)
 100                .outerWindowID
 101
 102 getSessionStore = ->
 103   Cc["@mozilla.org/browser/sessionstore;1"].getService(Ci.nsISessionStore);
 104
 105 exports.WindowEventTracker      = WindowEventTracker
 106 exports.Bucket                  = Bucket
 107 exports.isRootWindow            = isRootWindow
 108 exports.getEventWindow          = getEventWindow
 109 exports.getEventTabWindow       = getEventTabWindow
 110 exports.getEventRootWindow      = getEventRootWindow
 111 exports.getEventTabBrowser      = getEventTabBrowser
 112
 113 exports.getWindowId             = getWindowId
 114 exports.getRootWindow           = getRootWindow
 115 exports.isElementEditable       = isElementEditable
 116 exports.getSessionStore         = getSessionStore