User:MacGyverMagic/section0.js

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Documentation for this user script can be added at User:MacGyverMagic/section0.

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// Adds a tab allowing you to edit the 0th section of a page (the top area usually used as an introduction).

addOnloadHook(function () {
    var x;
    if (!(x = document.getElementById('ca-edit') )) return;
    var url;
    if (!(url = x.getElementsByTagName('a')[0] )) return;
    if (!(url = url.href )) return;
    var y = mw.util.addPortletLink('p-cactions', url+"&section=0", '0', 'ca-edit-0',
                           'Edit the lead section of this page', '0', x.nextSibling);

    y.className = x.className;  // steal classes from the the edit tab...
    x.className = 'istalk';     // ...and make the edit tab have no right margin

    // exception: don't steal the "selected" class unless actually editing section 0:
    if (/(^| )selected( |$)/.test(y.className)) {
        if (!document.editform || !document.editform.wpSection
            || document.editform.wpSection.value != "0") {
            y.className = y.className.replace(/(^| )selected( |$)/g, "$1");
            x.className += ' selected';
        }
    }
});