wp-includes/js/swfupload/plugins/swfupload.documentready.js

   1 /*
   2         DocumentReady Plug-in
   3
   4         This plugin loads SWFUpload as soon as the document is ready.  You should not load SWFUpload inside window.onload using this plugin.
   5         You can also chain other functions by calling SWFUpload.DocumentReady(your function).
   6
   7         Warning: Embedded Ads or other scripts that overwrite window.onload or use their own document ready functions may interfer with this plugin.  You
   8                 should not set window.onload when using this plugin.
   9
  10         Usage Example:
  11
  12         var swfu = new SWFUpload(your settings object);
  13         SWFUpload.DocumentReady(function () { alert('Document Ready!'; });
  14
  15 */
  16
  17 var SWFUpload;
  18 if (typeof(SWFUpload) === "function") {
  19         // Override iniSWFUpload so SWFUpload gets inited when the document is ready rather than immediately
  20         SWFUpload.prototype.initSWFUpload = function (old_initSWFUpload) {
  21                 return function (init_settings) {
  22                         var self = this;
  23                         if  (typeof(old_initSWFUpload) === "function") {
  24                                 SWFUpload.DocumentReady(function () {
  25                                         old_initSWFUpload.call(self, init_settings);
  26                                 });
  27                         }
  28                 }
  29
  30         }(SWFUpload.prototype.initSWFUpload);
  31
  32
  33         // The DocumentReady function adds the passed in function to
  34         // the functions that will be executed when the document is ready/loaded
  35         SWFUpload.DocumentReady = function (fn) {
  36                 // Add the function to the chain
  37                 SWFUpload.DocumentReady.InternalOnloadChain = function (previous_link_fn) {
  38                         return function () {
  39                                 if (typeof(previous_link_fn) === "function") {
  40                                         previous_link_fn();
  41                                 }
  42                                 fn();
  43                         };
  44                 }(SWFUpload.DocumentReady.InternalOnloadChain);
  45         };
  46         SWFUpload.DocumentReady.InternalOnloadChain = null;
  47         SWFUpload.DocumentReady.Onload = function () {
  48                 // Execute the onload function chain
  49                 if (typeof(SWFUpload.DocumentReady.InternalOnloadChain) === "function") {
  50                         SWFUpload.DocumentReady.InternalOnloadChain();
  51                 }
  52         };
  53         SWFUpload.DocumentReady.SetupComplete = false;
  54
  55
  56         /* ********************************************
  57                 This portion of the code gets executed as soon it is loaded.
  58                 It binds the proper event for executing JavaScript is
  59                 early as possible.  This is a per browser function and so
  60                 some browser sniffing is used.
  61
  62                 This solution still has the "exposed" issue (See the Global Delegation section at http://peter.michaux.ca/article/553 )
  63
  64                 Base solution from http://dean.edwards.name/weblog/2006/06/again/ and http://dean.edwards.name/weblog/2005/09/busted/
  65         ******************************************** */
  66         if (!SWFUpload.DocumentReady.SetupComplete) {
  67                 // for Internet Explorer (using conditional comments)
  68                 /*@cc_on @*/
  69                 /*@if (@_win32)
  70                 document.write("<script id=__ie_onload defer src=javascript:void(0)><\/script>");
  71                 var script = document.getElementById("__ie_onload");
  72                 script.onreadystatechange = function() {
  73                         if (this.readyState == "complete") {
  74                                 SWFUpload.DocumentReady.Onload(); // call the onload handler
  75                         }
  76                 };
  77                 SWFUpload.DocumentReady.SetupComplete = true;
  78                 /*@end @*/
  79         }
  80
  81         if (!SWFUpload.DocumentReady.SetupComplete && /WebKit/i.test(navigator.userAgent)) { // sniff
  82                 var _timer = setInterval(function() {
  83                         if (/loaded|complete/.test(document.readyState)) {
  84                                 clearInterval(_timer);
  85                                 SWFUpload.DocumentReady.Onload(); // call the onload handler
  86                         }
  87                 }, 10);
  88                 SWFUpload.DocumentReady.SetupComplete = true;
  89         }
  90
  91         /* for Mozilla */
  92         if (!SWFUpload.DocumentReady.SetupComplete && document.addEventListener) {
  93                 document.addEventListener("DOMContentLoaded", SWFUpload.DocumentReady.Onload, false);
  94                 SWFUpload.DocumentReady.SetupComplete = true;
  95         }
  96
  97         /* for other browsers */
  98         if (!SWFUpload.DocumentReady.SetupComplete) {
  99                 window.onload = SWFUpload.DocumentReady.Onload;
 100                 SWFUpload.DocumentReady.SetupComplete = true;
 101         }
 102 }