lib/dojo/gears.js.uncompressed.js

   1 define("dojo/gears", ["./_base/lang", "./sniff"], function(lang, has){
   2
   3 // module:
   4 //              dojo/gears
   5
   6 var gears = {
   7         // summary:
   8         //              TODOC
   9 };
  10 lang.setObject("dojo.gears", gears);
  11
  12 gears._gearsObject = function(){
  13         // summary:
  14         //              factory method to get a Google Gears plugin instance to
  15         //              expose in the browser runtime environment, if present
  16         var factory;
  17
  18         var gearsObj = lang.getObject("google.gears");
  19         if(gearsObj){ return gearsObj; } // already defined elsewhere
  20
  21         if(typeof GearsFactory != "undefined"){ // Firefox
  22                 factory = new GearsFactory();
  23         }else{
  24                 if(has("ie")){
  25                         // IE
  26                         try{
  27                                 factory = new ActiveXObject("Gears.Factory");
  28                         }catch(e){
  29                                 // ok to squelch; there's no gears factory.  move on.
  30                         }
  31                 }else if(navigator.mimeTypes["application/x-googlegears"]){
  32                         // Safari?
  33                         factory = document.createElement("object");
  34                         factory.setAttribute("type", "application/x-googlegears");
  35                         factory.setAttribute("width", 0);
  36                         factory.setAttribute("height", 0);
  37                         factory.style.display = "none";
  38                         document.documentElement.appendChild(factory);
  39                 }
  40         }
  41
  42         // still nothing?
  43         if(!factory){ return null; }
  44
  45         // define the global objects now; don't overwrite them though if they
  46         // were somehow set internally by the Gears plugin, which is on their
  47         // dev roadmap for the future
  48         lang.setObject("google.gears.factory", factory);
  49         return lang.getObject("google.gears");
  50 };
  51
  52
  53 // see if we have Google Gears installed, and if
  54 // so, make it available in the runtime environment
  55 // and in the Google standard 'google.gears' global object
  56 gears.available = (!!gears._gearsObject())||0;
  57 /*=====
  58  gears.available = {
  59  // summary:
  60  //             True if client is using Google Gears
  61  };
  62  =====*/
  63
  64 return gears;
  65 });