MediaWiki:Common.js

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

/* <pre> */


/* Test if an element has a certain class **************************************
 *
 * Description: Uses regular expressions and caching for better performance.
 * Source: [[MediaWiki:Common.js]] at Wikipedia
 */
 
var hasClass = (function () {
    var reCache = {};
    return function (element, className) {
        return (reCache[className] ? reCache[className] : (reCache[className] = new RegExp("(?:\\s|^)" + className + "(?:\\s|$)"))).test(element.className);
    };
})();


/** Collapsible tables *********************************************************
 *
 *  Description: Allows tables to be collapsed, showing only the
 *               header. See [[Help:Collapsing]] at Wikipedia.
 */

var autoCollapse = 2;
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 Monobook.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 );

/* </pre> */