// ==UserScript==
// @name     Reddit Enhancement Suite Image Auto Expand
// @namespace  RESAutoExpand
// @description  Automatically expands images within a thread when used with the Reddit Enhancement Suite script.
// @include  http://reddit.com/r/*
// @include  http://*.reddit.com/r/*
// @require  http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js
// @grant    GM_addStyle
// @version        1.0
// ==/UserScript==
/*- The @grant directive is needed to work around a design change
introduced in GM 1.0.   It restores the sandbox.
*/
/*--- waitForKeyElements():  A utility function, for Greasemonkey scripts,
that detects and handles AJAXed content.
Usage example:
waitForKeyElements (
"div.comments"
, commentCallbackFunction
);
//--- Page-specific function to do what we want when the node is found.
function commentCallbackFunction (jNode) {
jNode.text ("This comment changed by waitForKeyElements().");
}
IMPORTANT: This function requires your script to have loaded jQuery.
*/
function waitForKeyElements (
selectorTxt,    /* Required: The jQuery selector string that
specifies the desired element(s).
*/
actionFunction, /* Required: The code to run when elements are
found. It is passed a jNode to the matched
element.
*/
bWaitOnce,      /* Optional: If false, will continue to scan for
new elements even after the first match is
found.
*/
iframeSelector  /* Optional: If set, identifies the iframe to
search.
*/
) {
var targetNodes, btargetsFound;
if (typeof iframeSelector == "undefined")
targetNodes     = $(selectorTxt);
else
targetNodes     = $(iframeSelector).contents ()
.find (selectorTxt);
if (targetNodes  &&  targetNodes.length > 0) {
btargetsFound   = true;
/*--- Found target node(s).  Go through each and act if they
are new.
*/
targetNodes.each ( function () {
var jThis        = $(this);
var alreadyFound = jThis.data ('alreadyFound')  ||  false;
if (!alreadyFound) {
//--- Call the payload function.
var cancelFound     = actionFunction (jThis);
if (cancelFound)
btargetsFound   = false;
else
jThis.data ('alreadyFound', true);
}
} );
}
else {
btargetsFound   = false;
}
//--- Get the timer-control variable for this selector.
var controlObj      = waitForKeyElements.controlObj  ||  {};
var controlKey      = selectorTxt.replace (/[^\w]/g, "_");
var timeControl     = controlObj [controlKey];
//--- Now set or clear the timer as appropriate.
if (btargetsFound  &&  bWaitOnce  &&  timeControl) {
//--- The only condition where we need to clear the timer.
clearInterval (timeControl);
delete controlObj [controlKey]
}
else {
//--- Set a timer, if needed.
if ( ! timeControl) {
timeControl = setInterval ( function () {
waitForKeyElements (    selectorTxt,
actionFunction,
bWaitOnce,
iframeSelector
);
},
300
);
controlObj [controlKey] = timeControl;
}
}
waitForKeyElements.controlObj   = controlObj;
}
waitForKeyElements (".toggleImage.expando-button.collapsed.collapsedExpando.image.commentImg", clickSaveButton);
function clickSaveButton (jNode) {
triggerMouseEvent (jNode[0], "click");
}
function triggerMouseEvent (node, eventType) {
var clickEvent = document.createEvent('MouseEvents');
clickEvent.initEvent (eventType, true, true);
node.dispatchEvent (clickEvent);
}