Shorten BitBucket commit message on JIRA

Hides everything but the first line of a commit message
换行
// ==UserScript==
// @name         Shorten BitBucket commit message on JIRA
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  Hides everything but the first line of a commit message
//               on related commits for JIRA tickets linked to BitBucket.
// @author       DJ Marcolesco
// @match        https://*.atlassian.net/*
// @grant        none
// @require      http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
// ==/UserScript==
 
(function() {
    'use strict';
 
    waitForKeyElements('.commits-table', function ($$) {
        var $commits = $$.find('.commitrow');
 
        // Delete all text after first line on each commit row
        $commits.each(function () {
            var $message = $(this).find('.message .ellipsis');
            var text = $message.text();
            var pre_text = text.substr(0, text.indexOf('\n'));
            var post_text = text.substr(text.indexOf('\n'));
 
            $message.html('<span>' + pre_text + '</span><span style="opacity: .6;">' + post_text + '</span>');
        });
    });
})();
 
/*--- 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;
}
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