Widget:Collapse

( function () { /** * Handler for a click on a collapsible toggler. * * @private * @param {jQuery} $collapsible * @param {string} action The action this function will take ('expand' or 'collapse'). * @param {jQuery|null} [$defaultToggle] * @param {Object|undefined} [options] */ function toggleElement( $collapsible, action, $defaultToggle, options ) { var $collapsibleContent, $containers, hookCallback; options = options || {};

// Validate parameters

// $collapsible must be an instance of jQuery if ( !$collapsible.jquery ) { return; } if ( action !== 'expand' && action !== 'collapse' ) { // action must be string with 'expand' or 'collapse' return; } if ( $defaultToggle === undefined ) { $defaultToggle = null; }

// Trigger a custom event to allow callers to hook to the collapsing/expanding, // allowing the module to be testable, and making it possible to // e.g. implement persistence via cookies $collapsible.trigger( action === 'expand' ? 'beforeExpand.mw-collapsible' : 'beforeCollapse.mw-collapsible' ); hookCallback = function () { $collapsible.trigger( action === 'expand' ? 'afterExpand.mw-collapsible' : 'afterCollapse.mw-collapsible' ); };

// Handle different kinds of elements if ( !options.plainMode && $collapsible.is( 'table' ) ) { // Tables // If there is a caption, hide all rows; otherwise, only hide body rows if ( $collapsible.find( '> caption' ).length ) { $containers = $collapsible.find( '> * > tr' ); } else { $containers = $collapsible.find( '> tbody > tr' ); } if ( $defaultToggle ) { // Exclude table row containing togglelink $containers = $containers.not( $defaultToggle.closest( 'tr' ) ); }

} else if ( !options.plainMode && ( $collapsible.is( 'ul' ) || $collapsible.is( 'ol' ) ) ) { // Lists $containers = $collapsible.find( '> li' ); if ( $defaultToggle ) { // Exclude list-item containing togglelink $containers = $containers.not( $defaultToggle.parent() ); } } else {

// Everything else:

,

etc.

$collapsibleContent = $collapsible.find( '> .mw-collapsible-content' );

// If a collapsible-content is defined, act on it if ( !options.plainMode && $collapsibleContent.length ) { $containers = $collapsibleContent;

// Otherwise assume this is a customcollapse with a remote toggle // .. and there is no collapsible-content because the entire element should be toggled } else { $containers = $collapsible; } }

$containers.toggle( action === 'expand' ); hookCallback(); }

/** * Handle clicking/keypressing on the collapsible element toggle and other * situations where a collapsible element is toggled (e.g. the initial * toggle for collapsed ones). * * @private * @param {jQuery} $toggle the clickable toggle itself * @param {jQuery} $collapsible the collapsible element * @param {jQuery.Event|null} e either the event or null if unavailable * @param {Object|undefined} options */ function togglingHandler( $toggle, $collapsible, e, options ) { var wasCollapsed, $textContainer, collapseText, expandText; options = options || {};

if ( e ) { if ( e.type === 'click' && e.target.nodeName.toLowerCase() === 'a' && $( e.target ).attr( 'href' ) ) { // Don't fire if a link was clicked (for premade togglers) return; } else if ( e.type === 'keypress' && e.which !== 13 && e.which !== 32 ) { // Only handle keypresses on the "Enter" or "Space" keys return; } else { e.preventDefault(); e.stopPropagation(); } }

// This allows the element to be hidden on initial toggle without fiddling with the class if ( options.wasCollapsed !== undefined ) { wasCollapsed = options.wasCollapsed; } else { wasCollapsed = $collapsible.hasClass( 'mw-collapsed' ); }

// Toggle the state of the collapsible element (that is, expand or collapse) $collapsible.toggleClass( 'mw-collapsed', !wasCollapsed );

// Toggle the mw-collapsible-toggle classes, if requested (for default and premade togglers by default) if ( options.toggleClasses ) { $toggle .toggleClass( 'mw-collapsible-toggle-collapsed', !wasCollapsed ) .toggleClass( 'mw-collapsible-toggle-expanded', wasCollapsed ); }

// Toggle the text ("Show"/"Hide") within elements tagged with mw-collapsible-text if ( options.toggleText ) { collapseText = options.toggleText.collapseText; expandText = options.toggleText.expandText;

$textContainer = $toggle.find( '.mw-collapsible-text' ); if ( $textContainer.length ) { $textContainer.text( wasCollapsed ? collapseText : expandText ); } }

// And finally toggle the element state itself toggleElement( $collapsible, wasCollapsed ? 'expand' : 'collapse', $toggle, options ); }

/** * Enable collapsible-functionality on all elements in the collection. * * - Will prevent binding twice to the same element. * - Initial state is expanded by default, this can be overridden by adding class * "mw-collapsed" to the "mw-collapsible" element. * - Elements made collapsible have jQuery data "mw-made-collapsible" set to true. * - The inner content is wrapped in a "div.mw-collapsible-content" (except for tables and lists). * * @param {Object} [options] * @param {string} [options.collapseText] Text used for the toggler, when clicking it would * collapse the element. Default: the 'data-collapsetext' attribute of the * collapsible element or the content of 'collapsible-collapse' message. * @param {string} [options.expandText] Text used for the toggler, when clicking it would * expand the element. Default: the 'data-expandtext' attribute of the * collapsible element or the content of 'collapsible-expand' message. * @param {boolean} [options.collapsed] Whether to collapse immediately. By default * collapse only if the element has the 'mw-collapsed' class. * @param {jQuery} [options.$customTogglers] Elements to be used as togglers * for this collapsible element. By default, if the collapsible element * has an id attribute like 'mw-customcollapsible-XXX', elements with a * *class* of 'mw-customtoggle-XXX' are made togglers for it. * @param {boolean} [options.plainMode=false] Whether to use a "plain mode" when making the * element collapsible - that is, hide entire tables and lists (instead * of hiding only all rows but first of tables, and hiding each list * item separately for lists) and don't wrap other elements in * div.mw-collapsible-content. May only be used with custom togglers. * @return {jQuery} * @chainable */ $.fn.makeCollapsible = function ( options ) { options = options || {};

this.each( function () { var $collapsible, collapseText, expandText, $caption, $toggle, actionHandler, buildDefaultToggleLink, $firstItem, collapsibleId, $customTogglers, firstval;

// Ensure class "mw-collapsible" is present in case .makeCollapsible() // is called on element(s) that don't have it yet. $collapsible = $( this ).addClass( 'mw-collapsible' );

// Return if it has been enabled already. if ( $collapsible.data( 'mw-made-collapsible' ) ) { return; } else { // Let CSS know that it no longer needs to worry about flash of unstyled content. // This will allow mediawiki.makeCollapsible.styles to disable temporary pseudo elements, that // are needed to avoid a flash of unstyled content. $collapsible.addClass( 'mw-made-collapsible' ) .data( 'mw-made-collapsible', true ); }

// Use custom text or default? collapseText = options.collapseText || $collapsible.attr( 'data-collapsetext' ) || mw.msg( 'collapsible-collapse' ); expandText = options.expandText || $collapsible.attr( 'data-expandtext' ) || mw.msg( 'collapsible-expand' );

// Default click/keypress handler and toggle link to use when none is present actionHandler = function ( e, opts ) { var defaultOpts = { toggleClasses: true, toggleText: { collapseText: collapseText, expandText: expandText } }; opts = $.extend( defaultOpts, options, opts ); togglingHandler( $( this ), $collapsible, e, opts ); };

// Default toggle link. Only build it when needed to avoid jQuery memory leaks (event data). buildDefaultToggleLink = function () { return $( '<a>' ) .addClass( 'mw-collapsible-text' ) .text( collapseText ) .wrap( '' ) .parent() .attr( { role: 'button', tabindex: 0 } ); };

// Check if this element has a custom position for the toggle link // (ie. outside the container or deeper inside the tree) if ( options.$customTogglers ) { $customTogglers = $( options.$customTogglers ); } else { collapsibleId = $collapsible.attr( 'id' ) || ; if ( collapsibleId.indexOf( 'mw-customcollapsible-' ) === 0 ) { $customTogglers = $( '.' + collapsibleId.replace( 'mw-customcollapsible', 'mw-customtoggle' ) ) .addClass( 'mw-customtoggle' ); } }

// Add event handlers to custom togglers or create our own ones if ( $customTogglers && $customTogglers.length ) { actionHandler = function ( e, opts ) { var defaultOpts = {}; opts = $.extend( defaultOpts, options, opts ); togglingHandler( $( this ), $collapsible, e, opts ); };

$toggle = $customTogglers;

} else { // If this is not a custom case, do the default: wrap the // contents and add the toggle link. Different elements are // treated differently.

if ( $collapsible.is( 'table' ) ) {

// If the table has a caption, collapse to the caption // as opposed to the first row $caption = $collapsible.find( '> caption' ); if ( $caption.length ) { $toggle = $caption.find( '> .mw-collapsible-toggle' );

// If there is no toggle link, add it to the end of the caption if ( !$toggle.length ) { $toggle = buildDefaultToggleLink().appendTo( $caption ); } } else { // The toggle-link will be in one of the cells (td or th) of the first row $firstItem = $collapsible.find( 'tr:first th, tr:first td' ); $toggle = $firstItem.find( '> .mw-collapsible-toggle' );

// If theres no toggle link, add it to the last cell if ( !$toggle.length ) { $toggle = buildDefaultToggleLink().prependTo( $firstItem.eq( -1 ) ); } }

} else if ( $collapsible.parent().is( 'li' ) && $collapsible.parent().children( '.mw-collapsible' ).length === 1 && $collapsible.find( '> .mw-collapsible-toggle' ).length === 0 ) {

// special case of one collapsible in

tag $toggle = buildDefaultToggleLink(); $collapsible.before( $toggle ); } else if ( $collapsible.is( 'ul' ) || $collapsible.is( 'ol' ) ) { // The toggle-link will be in the first list-item $firstItem = $collapsible.find( 'li:first' ); $toggle = $firstItem.find( '> .mw-collapsible-toggle' ); // If theres no toggle link, add it if ( !$toggle.length ) { // Make sure the numeral order doesn't get messed up, force the first (soon to be second) item // to be "1". Except if the value-attribute is already used. // If no value was set WebKit returns "", Mozilla returns '-1', others return 0, null or undefined. firstval = $firstItem.prop( 'value' ); if ( firstval === undefined || !firstval || firstval === '-1' || firstval === -1 ) { $firstItem.prop( 'value', '1' ); } $toggle = buildDefaultToggleLink(); $toggle.wrap( '

' ).parent().prependTo( $collapsible ); } } else { //

,

etc.

// The toggle-link will be the first child of the element $toggle = $collapsible.find( '> .mw-collapsible-toggle' );

// If a direct child .content-wrapper does not exists, create it if ( !$collapsible.find( '> .mw-collapsible-content' ).length ) {

$collapsible.wrapInner( '

' );

}

// If theres no toggle link, add it if ( !$toggle.length ) { $toggle = buildDefaultToggleLink().prependTo( $collapsible ); } } }

// Attach event handlers to togglelink $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler ) .prop( 'tabIndex', 0 );

$( this ).data( 'mw-collapsible', { collapse: function () { actionHandler.call( $toggle.get( 0 ), null, { wasCollapsed: false } ); }, expand: function () { actionHandler.call( $toggle.get( 0 ), null, { wasCollapsed: true } ); }, toggle: function () { actionHandler.call( $toggle.get( 0 ), null, null ); } } );

// Initial state if ( options.collapsed || $collapsible.hasClass( 'mw-collapsed' ) ) { // One toggler can hook to multiple elements, and one element can have // multiple togglers. This is the sanest way to handle that. actionHandler.call( $toggle.get( 0 ), null, { wasCollapsed: false } ); }

} );

/** * Fired after collapsible content has been initialized * * This gives an option to modify the collapsible behavior. * * @event wikipage_collapsibleContent * @member mw.hook * @param {jQuery} $content All the elements that have been made collapsible */ mw.hook( 'wikipage.collapsibleContent' ).fire( this );

return this; };

/** * @class jQuery * @mixins jQuery.plugin.makeCollapsible */

}() );