User:Mike Dillon/Scripts/imageLinksByNs.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:Mike Dillon/Scripts/imageLinksByNs.

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.

// Requires: [[User:Mike Dillon/Scripts/namespaces.js]]
// Requires: [[User:Mike Dillon/Scripts/easydom.js]]

//<pre><nowiki>

$(function () {
    var node = document.getElementById("filelinks");
    if (!node) return;

    // Find the first UL after the header with the id "filelinks"
    while (node = node.nextSibling) {
        if (node.tagName && node.tagName.match(/^[Uu][Ll]$/)) {
            break;
        }
    }

    // Couldn't find the node, so bail out
    if (!node) return;

    // Stash the parent and next sibling of the list for later
    var parent = node.parentNode;
    var nextSibling = node.nextSibling;

    // Remove list from parent to work offline
    parent.removeChild(node);

    // Hash to store per-namespace lists
    var namespaceLists = {};

    // Build up a list of links by namespace
    var fileLink;
    var fileLinks = node.getElementsByTagName("li");
    for (var i = 0; fileLink = fileLinks[i]; i++) {
        var ns = getNamespaceNumber(fileLink.firstChild.firstChild.data);
        if (!namespaceLists[ns]) {
            namespaceLists[ns] = new Array();
        }
        namespaceLists[ns].push(fileLink);
    }

    // Rebuild the new subdivided lists
    with (easydom) {
        var newList = ul();
        for (var ns in wgNamespaceNames) {
            var items = namespaceLists[ns];
            if (!items) continue;

            var nodeData = {};
            items.sort(function (a, b) {
                var aData = nodeData[a] ? nodeData[a] : a.firstChild.firstChild.data.toLowerCase();
                var bData = nodeData[b] ? nodeData[b] : b.firstChild.firstChild.data.toLowerCase();
                return aData > bData ? 1 : aData < bData ? -1 : 0;
            });

            var nsList = ul();
            for (var i in items) {
                nsList.appendChild(items[i]);
            }

            newList.appendChild(li(strong(wgNamespaceNames[ns]), nsList));
        }
    }

    // Put the new list back in the DOM in place of the original list
    if (nextSibling) {
        parent.insertBefore(newList, nextSibling);
    } else {
        parent.appendChild(newList);
    }
});

//</nowiki></pre>