MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */

/** Collapsible tables
Description: Allows tables to be collapsed, showing only the header. See http://www.mediawiki.org/wiki/Manual:Collapsible_tables.
Maintainers: [[en:User:R. Koot]]
*/
 
var autoCollapse = 3;
var collapseCaption = 'hide';
var expandCaption = 'show';
 
function collapseTable( tableIndex ) {
        var Button = document.getElementById( 'collapseButton' + tableIndex );
        var Table = document.getElementById( 'collapsibleTable' + tableIndex );
         if ( !Table || !Button ) return false;
        var Rows = Table.rows;
 
        if ( Button.firstChild.data == collapseCaption ) {
                for ( var i = 1; i < Rows.length; i++ ) {
                        Rows[i].style.display = 'none';
                }
                Button.firstChild.data = expandCaption;
        } else {
                for ( var i = 1; i < Rows.length; i++ ) {
                        Rows[i].style.display = Rows[0].style.display;
                }
                Button.firstChild.data = collapseCaption;
        }
}
 
function createCollapseButtons() {
        var tableIndex = 0;
        var NavigationBoxes = new Object();
        var Tables = document.getElementsByTagName( 'table' );
 
        for ( var i = 0; i < Tables.length; i++ ) {
                if ( hasClass( Tables[i], 'collapsible' ) ) {
 
                        /* only add button and increment count if there is a header row to work with */
                        var HeaderRow = Tables[i].getElementsByTagName( 'tr' )[0];
                        if ( !HeaderRow ) {
                                continue;
                        }
                        var Header = HeaderRow.getElementsByTagName( 'th' )[0];
                        if ( !Header ) {
                                continue;
                        }
 
                        NavigationBoxes[tableIndex] = Tables[i];
                        Tables[i].setAttribute( 'id', 'collapsibleTable' + tableIndex );
 
                        var Button = document.createElement( 'span' );
                        var ButtonLink = document.createElement( 'a' );
                        var ButtonText = document.createTextNode( collapseCaption );
 
                        Button.className = 'collapseButton'; // Styles are declared in [[MediaWiki:Common.css]]
 
                        ButtonLink.style.color = Header.style.color;
                        ButtonLink.setAttribute( 'id', 'collapseButton' + tableIndex );
                        ButtonLink.setAttribute( 'href', "javascript:collapseTable(" + tableIndex + ");" );
                        ButtonLink.appendChild( ButtonText );
 
                        Button.appendChild( document.createTextNode( '[' ) );
                        Button.appendChild( ButtonLink );
                        Button.appendChild( document.createTextNode( ']' ) );
 
                        Header.insertBefore( Button, Header.childNodes[0] );
                        tableIndex++;
                }
        }
 
        for ( var i = 0;  i < tableIndex; i++ ) {
                if ( hasClass( NavigationBoxes[i], 'collapsed' ) || ( tableIndex >= autoCollapse && hasClass( NavigationBoxes[i], 'autocollapse' ) ) ) {
                        collapseTable( i );
                } else if ( hasClass( NavigationBoxes[i], 'innercollapse' ) ) {
                        var element = NavigationBoxes[i];
                        while ( element = element.parentNode ) {
                                if ( hasClass( element, 'outercollapse' ) ) {
                                        collapseTable( i );
                                        break;
                                }
                        }
                }
        }
}
 
addOnloadHook( createCollapseButtons );
 
/** Test if an element has a certain class **************************************
 *
 * Description: Uses regular expressions and caching for better performance.
 * Maintainers: [[User:Mike Dillon]], [[User:R. Koot]], [[User:SG]]
 */
 
var hasClass = ( function() {
        var reCache = {};
        return function( element, className ) {
                return ( reCache[className] ? reCache[className] : ( reCache[className] = new RegExp( "(?:\\s|^)" + className + "(?:\\s|$)" ) ) ).test( element.className );
        };
})();

/* push Notes down below infoboxes */
$('h2:contains("Notes")').attr('class','notes');
/* replace "Coppermind:Welcome" with "Welcome to the Coppermind" */
$('h1:contains("Coppermind:Welcome")').text("Welcome to the Coppermind");
/* autocollapse infoboxes if off page
$('.notes').nextAll('.collapsible').each(function(i,el){
    if (el.getBoundingClientRect().top > 0)
        return;
})
*/

/*
filters for the first previous `sel` on each of `this`
cb gets the passed element and the first matched element (or _default, if nothing matched)
*/
$.fn.previous = function(sel, cb/*(el)*/, _default){
 $(this).each(function(){ var pre = $(this).prevAll(sel); cb.call(this, pre.length ? pre.first() : _default); })
}
/* returns true if the element has the passed class */
$.fn.classed = function(cls){ return $(this)[0].classList?$(this)[0].classList.contains(cls):false; }

function ne(tag, attrs){ var _ = $(document.createElement(tag)); for (var i in attrs) _.attr(i, attrs[i]); return _; }
function css(rules){ var _ = []; for (var rule in rules) _.push(rule+':'+rules[rule]); return _.join(';'); }

/*
filter for all .notice instances (not including .stub's)
returning the 'parent' header:
- subsection: the hX of the subsection
- preamble: the first h1 element
*/
function NoticeHeaderPairs(cb/*(el_header)*/){
 $('.notice:not(.stub)').previous('h1,h2,h3,h4,h5', cb, $('h1'))
}

/*
 pass to NoticeHeaderPairs to add notices to headers
*/
function AddNoticeToHeader(h){
var that = $(this)
   if (that.classed('error'))
      h.append(ne('span',{style: css({float:'right',color:'red'}), class: 'error'}).text('!'))
   if (that.classed('warn'))
      h.append(ne('span',{style: css({float:'right',color:'yellow'}), class: 'error'}).text('?'))
}