User:Fnlayson/rollback.js

Code that you insert on this page could contain malicious content capable of compromising your account. If you import a script from another page with "importScript", "mw.loader.load", "iusc", or "lusc", take note that this causes you to dynamically load a remote script, which could be changed by others. Editors are responsible for all edits and actions they perform, including by scripts. User scripts are not centrally supported and may malfunction or become inoperable due to software changes. A guide to help you find broken scripts is available. If you are unsure whether code you are adding to this page is safe, you can ask at the appropriate village pump.
This code will be executed when previewing this page.

Documentation for this user script can be added at User:Fnlayson/rollback.

Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.

/* Copied from User:Gracenotes/rollback.js.  Thanks!
 *
 * How to use:
 * 
 * Add the following to [[Special:Mypage/monobook.js]] as a
 * logged-in user using the monobook skin:
 *   importScript('User:Gracenotes/rollback.js');
 *
 * On diff pages, a "summary" link will appear next to "rollback".
 * When you click on "summary", you will be prompted to enter a
 * summary. Press "Cancel" to cancel, and leave a blank summary
 * to use the default. In the summary, the text "$user" will
 * automatically be replaced with the user name you're reverting.
 * e.g., "rv edits by $user; not true"
 * 
 * "sum" link label changed to "summary" below. -Fnlayson
 * update code from User:Gracenotes's page on 1/23/2015.
 */

function addSumLink() {
    var rbnode = [], diffnode, index = {}, gebcn = document.getElementsByClassName
        ? function(a, b, c) { return a.getElementsByClassName(c) }
        : getElementsByClassName;
    if (typeof rollbackLinksDisable == 'object' && rollbackLinksDisable instanceof Array)
        for (var i = 0; i < rollbackLinksDisable.length; i++)
            index[rollbackLinksDisable[i]] = true;
    if (!('user' in index) && mw.config.get("wgCanonicalSpecialPageName") == "Contributions" ||
        !('recent' in index) && mw.config.get("wgCanonicalSpecialPageName") == "Recentchanges" ||
        !('watchlist' in index) && mw.config.get("wgCanonicalSpecialPageName") == "Watchlist")
        rbnode = gebcn(document.getElementById("bodyContent"), "span", "mw-rollback-link");
    else if (!('history' in index) && mw.config.get("wgAction") == "history")
        rbnode = gebcn(document.getElementById("pagehistory"), "span", "mw-rollback-link");
    else if (!('diff' in index) && (diffnode = document.getElementById("mw-diff-ntitle2")))
        rbnode = gebcn(diffnode, "span", "mw-rollback-link");
    for (var i = 0, len = rbnode.length; i < len; i++)
        addRollbackSummaryLink(rbnode[i]);
}

function confirmRollback() {
    var url = this.href;
    var user = url.match(/[?&]from=([^&]*)/);
    if (!user) return;
    user = decodeURIComponent(user[1].replace(/\+/g, " "));
    var summary = prompt("Enter a summary to use for rollback.\n\nLeave blank to use the default. $user will be replaced with \"" + user + "\".",
                         rollbackSummaryDefault);
    if (summary == undefined)
        return false;
    else if (summary == "")
        return true;
    this.href += "&summary=" + encodeURIComponent(summary.replace(/\$user/g, user));
    return true;
}

function addRollbackSummaryLink(rbnode) {
    var rblink = rbnode.getElementsByTagName("a")[0];
    var alink = rblink.cloneNode(true);
    alink.className = ""; //don't confuse other scripts
    alink.firstChild.nodeValue = "summary";
    alink.onclick = confirmRollback;
    rbnode.insertBefore(alink, rblink.nextSibling);
    rbnode.insertBefore(document.createTextNode(" | "), alink);
}
if (typeof rollbackLinksDisable == 'undefined')
    rollbackLinksDisable = [];
if (typeof rollbackSummaryDefault == 'undefined')
    rollbackSummaryDefault = "";

$(addSumLink);

/*  addOnloadHook(addSumLink);
 */