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waitForKeyElementsNeamow

waitForKeyElementsNeamow custom library

此脚本不应直接安装，它是一个供其他脚本使用的外部库。如果您需要使用该库，请在脚本元属性加入：// @require https://update.gf.qytechs.cn/scripts/466855/1194139/waitForKeyElementsNeamow.js 

  1. /*--- waitForKeyElements():  A utility function, for Greasemonkey scripts,
  2.     that detects and handles AJAXed content.
  3.  
  4.     Usage example:
  5.  
  6.         waitForKeyElements (
  7.             "div.comments"
  8.             , commentCallbackFunction
  9.         );
  10.  
  11.         //--- Page-specific function to do what we want when the node is found.
  12.         function commentCallbackFunction (jNode) {
  13.             jNode.text ("This comment changed by waitForKeyElements().");
  14.         }
  15.  
  16.     IMPORTANT: This function requires your script to have loaded jQuery.
  17. */
  18. function waitForKeyElements (
  19.     selectorTxt,    /* Required: The jQuery selector string that
  20.                         specifies the desired element(s).
  21.                     */
  22.     actionFunction, /* Required: The code to run when elements are
  23.                         found. It is passed a jNode to the matched
  24.                         element.
  25.                     */
  26.     bWaitOnce,      /* Optional: If false, will continue to scan for
  27.                         new elements even after the first match is
  28.                         found.
  29.                     */
  30.     iframeSelector  /* Optional: If set, identifies the iframe to
  31.                         search.
  32.                     */
  33. ) {
  34.     var targetNodes, btargetsFound;
  35.  
  36.     if (typeof iframeSelector == "undefined")
  37.         targetNodes     = $(selectorTxt);
  38.     else
  39.         targetNodes     = $(iframeSelector).contents ()
  40.                                            .find (selectorTxt);
  41.  
  42.     if (targetNodes  &&  targetNodes.length > 0) {
  43.         btargetsFound   = true;
  44.         /*--- Found target node(s).  Go through each and act if they
  45.             are new.
  46.         */
  47.         targetNodes.each ( function () {
  48.             var jThis        = $(this);
  49.             var alreadyFound = jThis.data ('alreadyFound')  ||  false;
  50.  
  51.             if (!alreadyFound) {
  52.                 //--- Call the payload function.
  53.                 var cancelFound     = actionFunction (jThis);
  54.                 if (cancelFound)
  55.                     btargetsFound   = false;
  56.                 else
  57.                     jThis.data ('alreadyFound', true);
  58.             }
  59.         } );
  60.     }
  61.     else {
  62.         btargetsFound   = false;
  63.     }
  64.  
  65.     //--- Get the timer-control variable for this selector.
  66.     var controlObj      = waitForKeyElements.controlObj  ||  {};
  67.     var controlKey      = selectorTxt.replace (/[^\w]/g, "_");
  68.     var timeControl     = controlObj [controlKey];
  69.  
  70.     //--- Now set or clear the timer as appropriate.
  71.     if (btargetsFound  &&  bWaitOnce  &&  timeControl) {
  72.         //--- The only condition where we need to clear the timer.
  73.         clearInterval (timeControl);
  74.         delete controlObj [controlKey]
  75.     }
  76.     else {
  77.         //--- Set a timer, if needed.
  78.         if ( ! timeControl) {
  79.             timeControl = setInterval ( function () {
  80.                     waitForKeyElements (    selectorTxt,
  81.                                             actionFunction,
  82.                                             bWaitOnce,
  83.                                             iframeSelector
  84.                                         );
  85.                 },
  86.                 300
  87.             );
  88.             controlObj [controlKey] = timeControl;
  89.         }
  90.     }
  91.     waitForKeyElements.controlObj   = controlObj;
  92. }

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