MediaWiki:Common.js

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

/**
 * Collapsible tables
 *
 * Allows tables to be collapsed, showing only the header. See [[Wikipedia:NavFrame]].
 * @maintainer [[User:R. Koot]] (on Wikipedia)
 */

var autoCollapse = 2;
var collapseCaption = 'hide';
var expandCaption = 'show';

function hasClass( element, className ) {
	var Classes = element.className.split( " " );
	for ( var i = 0; i < Classes.length; i++ ) {
		if ( Classes[i] == className ) {
			return true;
		}
	}
	return false;
}

function collapseTable( tableIndex ) {
	var i;
	var Button = document.getElementById( 'collapseButton' + tableIndex );
	var Table = document.getElementById( 'collapsibleTable' + tableIndex );

	if ( !Table || !Button ) {
		return false;
	}

	var Rows = Table.getElementsByTagName( 'tr' );

	if ( Button.firstChild.data == collapseCaption ) {
		for ( i = 1; i < Rows.length; i++ ) {
			Rows[i].style.display = 'none';
		}
		Button.firstChild.data = expandCaption;
	} else {
		for ( i = 1; i < Rows.length; i++ ) {
			Rows[i].style.display = Rows[0].style.display;
		}
		Button.firstChild.data = collapseCaption;
	}
}

function createCollapseButtons() {
	var i;
	var tableIndex = 0;
	var NavigationBoxes = {};
	var Tables = document.getElementsByTagName( 'table' );

	for ( i = 0; i < Tables.length; i++ ) {
		if ( hasClass( Tables[i], 'collapsible' ) ) {
			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.style.styleFloat = 'right';
			Button.style.cssFloat = 'right';
			Button.style.fontWeight = 'normal';
			Button.style.textAlign = 'right';
			Button.style.width = '6em';

			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( ']' ) );

			var Header = Tables[i].getElementsByTagName( 'tr' )[0].getElementsByTagName( 'th' )[0];
			/* only add button and increment count if there is a header row to work with */
			if (Header) {
				Header.insertBefore( Button, Header.childNodes[0] );
				tableIndex++;
			}
		}
	}

	for ( i = 0; i < tableIndex; i++ ) {
		if ( hasClass( NavigationBoxes[i], 'collapsed' ) || ( tableIndex >= autoCollapse && hasClass( NavigationBoxes[i], 'autocollapse' ) ) ) {
			collapseTable( i );
		}
	}
}

$( createCollapseButtons );