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Reddit Enhancement Suite Image Auto Expand

Automatically expands images within a thread when used with the Reddit Enhancement Suite script.

  1. // ==UserScript==
  2. // @name     Reddit Enhancement Suite Image Auto Expand
  3. // @namespace  RESAutoExpand
  4. // @description  Automatically expands images within a thread when used with the Reddit Enhancement Suite script.
  5. // @include  http://reddit.com/r/*
  6. // @include  http://*.reddit.com/r/*
  7. // @require  http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js
  8. // @grant    GM_addStyle
  9. // @version        1.0
  10. // ==/UserScript==
  11. /*- The @grant directive is needed to work around a design change
  12.     introduced in GM 1.0.   It restores the sandbox.
  13. */
  14.  
  15. /*--- waitForKeyElements():  A utility function, for Greasemonkey scripts,
  16.     that detects and handles AJAXed content.
  17.  
  18.     Usage example:
  19.  
  20.         waitForKeyElements (
  21.             "div.comments"
  22.             , commentCallbackFunction
  23.         );
  24.  
  25.         //--- Page-specific function to do what we want when the node is found.
  26.         function commentCallbackFunction (jNode) {
  27.             jNode.text ("This comment changed by waitForKeyElements().");
  28.         }
  29.  
  30.     IMPORTANT: This function requires your script to have loaded jQuery.
  31. */
  32. function waitForKeyElements (
  33.     selectorTxt,    /* Required: The jQuery selector string that
  34.                         specifies the desired element(s).
  35.                     */
  36.     actionFunction, /* Required: The code to run when elements are
  37.                         found. It is passed a jNode to the matched
  38.                         element.
  39.                     */
  40.     bWaitOnce,      /* Optional: If false, will continue to scan for
  41.                         new elements even after the first match is
  42.                         found.
  43.                     */
  44.     iframeSelector  /* Optional: If set, identifies the iframe to
  45.                         search.
  46.                     */
  47. ) {
  48.     var targetNodes, btargetsFound;
  49.  
  50.     if (typeof iframeSelector == "undefined")
  51.         targetNodes     = $(selectorTxt);
  52.     else
  53.         targetNodes     = $(iframeSelector).contents ()
  54.                                            .find (selectorTxt);
  55.  
  56.     if (targetNodes  &&  targetNodes.length > 0) {
  57.         btargetsFound   = true;
  58.         /*--- Found target node(s).  Go through each and act if they
  59.             are new.
  60.         */
  61.         targetNodes.each ( function () {
  62.             var jThis        = $(this);
  63.             var alreadyFound = jThis.data ('alreadyFound')  ||  false;
  64.  
  65.             if (!alreadyFound) {
  66.                 //--- Call the payload function.
  67.                 var cancelFound     = actionFunction (jThis);
  68.                 if (cancelFound)
  69.                     btargetsFound   = false;
  70.                 else
  71.                     jThis.data ('alreadyFound', true);
  72.             }
  73.         } );
  74.     }
  75.     else {
  76.         btargetsFound   = false;
  77.     }
  78.  
  79.     //--- Get the timer-control variable for this selector.
  80.     var controlObj      = waitForKeyElements.controlObj  ||  {};
  81.     var controlKey      = selectorTxt.replace (/[^\w]/g, "_");
  82.     var timeControl     = controlObj [controlKey];
  83.  
  84.     //--- Now set or clear the timer as appropriate.
  85.     if (btargetsFound  &&  bWaitOnce  &&  timeControl) {
  86.         //--- The only condition where we need to clear the timer.
  87.         clearInterval (timeControl);
  88.         delete controlObj [controlKey]
  89.     }
  90.     else {
  91.         //--- Set a timer, if needed.
  92.         if ( ! timeControl) {
  93.             timeControl = setInterval ( function () {
  94.                     waitForKeyElements (    selectorTxt,
  95.                                             actionFunction,
  96.                                             bWaitOnce,
  97.                                             iframeSelector
  98.                                         );
  99.                 },
  100.                 300
  101.             );
  102.             controlObj [controlKey] = timeControl;
  103.         }
  104.     }
  105.     waitForKeyElements.controlObj   = controlObj;
  106. }
  107.  
  108.  
  109. waitForKeyElements (".toggleImage.expando-button.collapsed.collapsedExpando.image.commentImg", clickSaveButton);
  110.  
  111. function clickSaveButton (jNode) {
  112.     triggerMouseEvent (jNode[0], "click");
  113. }
  114.  
  115. function triggerMouseEvent (node, eventType) {
  116.     var clickEvent = document.createEvent('MouseEvents');
  117.     clickEvent.initEvent (eventType, true, true);
  118.     node.dispatchEvent (clickEvent);
  119. }
  120.  
  121.  
  122.