MediaWiki:Gadget-QuickDiff.js

/* QuickDiff - quickly view any diff link */

/*jslint browser, long */ /*global jQuery, mediaWiki, dev */

(function ($, mw) {   "use strict";

// double-run protection if (window.quickDiffLoaded) { return; }   window.quickDiffLoaded = true;

var diffStylesModule = ["mediawiki.diff.styles"]; var i18n; var modal; var special = {};

// "Special:Diff/12345" and "Special:ComparePages" link detection function initSpecialPageStrings { special.diffDefault = mw.util.getUrl("Special:Diff/"); special.compareDefault = mw.util.getUrl("Special:ComparePages");

var wiki = mw.config.get("wgDBname"); var storageKeyDiff = "QuickDiff-specialdiff_" + wiki; var storageKeyCompare = "QuickDiff-specialcompare_" + wiki;

try { special.diff = localStorage.getItem(storageKeyDiff); special.compare = localStorage.getItem(storageKeyCompare); } catch (ignore) {}

if (special.diff && special.compare) { // using stored values - no need for api request return; }

$.getJSON(mw.util.wikiScript("api"), {           action: "parse",            format: "json",            prop: "text",            text: " Special:Diff/ Special:ComparePages ",            disablepp: "" // note: deprecated in MW 1.26, but needed for older versions        }).done(function (data) {            var $parsed = $(data.parse.text["*"]);

special.diff = $parsed.find(".diff > a").attr("href"); special.compare = $parsed.find(".compare > a").attr("href");

try { localStorage.setItem(storageKeyDiff, special.diff); localStorage.setItem(storageKeyCompare, special.compare); } catch (ignore) {} });   }

function getDiffTitle($diff) { var prevTitle = $diff.find("#mw-diff-otitle1 a").attr("title"); var currTitle = $diff.find("#mw-diff-ntitle1 a").attr("title");

if (prevTitle && prevTitle !== currTitle) { return i18n("differences-multipage", prevTitle, currTitle).plain; }

return i18n("differences", currTitle).plain; }

function addDiffActions { var prevTitle = modal.$content.find("#mw-diff-otitle1 a").attr("title"); var currTitle = modal.$content.find("#mw-diff-ntitle1 a").attr("title");

// collect action links (edit, undo, rollback, patrol) from the diff // TODO: remove "mw-rev-head-action" once Wikia 1.19 is gone var $actions = modal.$content.find(".diff-ntitle").find(           ".mw-rev-head-action, .mw-diff-edit, .mw-diff-undo, .mw-rollback-link, .patrollink, .mw-diff-tool"        ).clone;

// remove text nodes (the brackets around each link) $actions.contents.filter(function (ignore, element) {           return element.nodeType === 3;        }).remove;

$actions.find("a") .addClass("qdmodal-button") .attr("target", "_blank");

// if diff is for one page, add a page history action if (prevTitle === currTitle) { $actions = $actions.add(               $("").attr({ "class": "qdmodal-button", href: mw.util.getUrl(currTitle, {action: "history"}), target: "_blank" }).text(i18n("history").plain)           ); }

modal.$footer.append($actions); }

function loadDiff(url) { modal.show({           loading: true,            title: !modal.visible && i18n("loading").plain        });

// add 'action=render' and 'diffonly' params to save some bytes on each request url.extend({           action: "render",            diffonly: "1"        });

// pass through 'bot' param for rollback links if it's in use on the current page if (mw.util.getParamValue("bot")) { url.extend({bot: "1"}); }

$.when(           $.get(url.getRelativePath),            mw.loader.using(diffStylesModule)        ).always(function (response) {            delete url.query.action;            delete url.query.diffonly;            delete url.query.bot;

var data = { buttons: [{ text: i18n("link").plain, href: url.toString, attr: {"data-disable-quickdiff": ""} }]           };            var $diff;

if (typeof response[0] === "string") { var $content = $(response[0]); $diff = $content.filter("table.diff, #mw-rev-deleted-no-diff");

if (!$diff.length) { // $content is a complete page - see if a diff can be found // needed for diffs from special pages as they ignore action=render URL parameter $diff = $content.find("table.diff"); }           }

if ($diff && $diff.length) { data.content = $diff; data.hook = "quickdiff.ready"; data.onBeforeShow = addDiffActions; data.title = getDiffTitle($diff); } else { data.content = i18n("error", url.toString).escape; }

// if a diff, fire the standard MW hook if ($diff.is("table.diff[data-mw='interface']")) { mw.hook("wikipage.diff").fire($diff); }

modal.show(data); });   }

function keydownHandler(event) { if (!modal.visible) { return; }

if (event.key === "ArrowLeft") { modal.$content.find("#differences-prevlink").trigger("click"); } else if (event.key === "ArrowRight") { modal.$content.find("#differences-nextlink").trigger("click"); }   }

function linkClickHandler(event) { // ignore clicks with modifier keys to avoid overriding browser features if (event.altKey || event.ctrlKey || event.metaKey || event.shiftKey) { return; }

// ignore click if link has "data-disable-quickdiff" attribute set if (event.currentTarget.dataset.disableQuickdiff !== undefined) { return; }

var url = event.currentTarget.href;

try { url = new mw.Uri(url); } catch (ignore) { // quit if url couldn't be parsed // it wouldn't be a link QuickDiff could handle anyway return; }

// cross-domain requests not supported if (url.host !== location.hostname) { return; }

// no fragment check is to ensure section links/collapsible trigger links on diff pages are ignored var hasDiffParam = url.query.diff !== undefined && url.fragment === undefined; var isSpecialDiffLink = url.path.indexOf(special.diff) === 0 || url.path.indexOf(special.diffDefault) === 0; var isSpecialCompareLink = url.path.indexOf(special.compare) === 0 || url.path.indexOf(special.compareDefault) === 0;

if (hasDiffParam || isSpecialDiffLink || isSpecialCompareLink) { event.preventDefault; loadDiff(url); }   }

function init { var $body = $(document.body); modal = new mw.libs.QDmodal("quickdiff-modal");

// full screen modal var css = "#quickdiff-modal { height: 100%; width: 100% }"; // always show modal footer for UI consistency css += "#quickdiff-modal > footer { display: flex }"; mw.util.addCSS(css);

// diff styles module was renamed in MW 1.28 - change if older name detected if (mw.loader.getState("mediawiki.action.history.diff")) { diffStylesModule[0] = "mediawiki.action.history.diff"; }

// attach to body for compatibility with ajax-loaded content // also, one attached event handler is better than hundreds! $body.on("click.quickdiff", "a[href]", linkClickHandler);

// listen for left/right arrow keys, to move between prev/next diff $body.on("keydown.quickdiff", keydownHandler);

initSpecialPageStrings; }

function initDependencies { var devLoadUrl = "https://dev.fandom.com/load.php?mode=articles&only=scripts&articles=MediaWiki:"; var i18nMsgs = new $.Deferred; var waitFor = [ i18nMsgs, mw.loader.using(["mediawiki.Uri", "mediawiki.util"]) ];

if (!(mw.libs.QDmodal && mw.libs.QDmodal.version >= 20201108)) { waitFor.push($.ajax({ cache: true, dataType: "script", url: devLoadUrl + "QDmodal.js&cb=20201108" }));       }

if (!(window.dev && dev.i18n && dev.i18n.loadMessages)) { mw.loader.load(devLoadUrl + "I18n-js/code.js"); }

mw.hook("dev.i18n").add(function (i18njs) {           i18njs.loadMessages("QuickDiff", {cacheVersion: 1}).done(function (i18nData) { i18n = i18nData.msg; i18nMsgs.resolve; });       });

$.when.apply($, waitFor).done(init); }

initDependencies; }(jQuery, mediaWiki));