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/**
* jQuery makeCollapsible
* Note: To avoid performance issues such as reflows, several styles are
* shipped in mediawiki.makeCollapsible.styles to reserve space for the toggle control. Please
* familiarise yourself with that CSS before making any changes to this code.
*
* Dual licensed:
* - CC BY 3.0 <https://creativecommons.org/licenses/by/3.0>
* - GPL2 <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
*/
/**
* Collapse a collection of elements.
*
* @module jquery.makeCollapsible
*/
( function () {
/**
* Handler for a click on a collapsible toggler.
*
* @private
* @param {jQuery} $collapsible
* @param {boolean} expand Expand the element, otherwise collapse
* @param {jQuery|null} [$defaultToggle]
* @param {Object|undefined} [options]
*/
function toggleElement( $collapsible, expand, $defaultToggle, options ) {
options = options || {};
// Validate parameters
// $collapsible must be an instance of jQuery
if ( !$collapsible.jquery ) {
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( expand ? 'beforeExpand.mw-collapsible' : 'beforeCollapse.mw-collapsible' );
const hookCallback = function () {
$collapsible.trigger( expand ? 'afterExpand.mw-collapsible' : 'afterCollapse.mw-collapsible' );
};
// Handle different kinds of elements
let $containers;
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: <div>, <p> etc.
const $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( 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 ) {
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 === 'keydown' && e.which !== 13 && e.which !== 32 ) {
// Only handle 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
let wasCollapsed;
if ( options.wasCollapsed !== undefined ) {
wasCollapsed = options.wasCollapsed;
} else {
// eslint-disable-next-line no-jquery/no-class-state
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 `aria-expanded` attribute, if requested (for default and premade togglers by default).
if ( options.toggleARIA ) {
$toggle.attr( 'aria-expanded', wasCollapsed ? 'true' : 'false' );
}
// Toggle the text ("Show"/"Hide") within elements tagged with mw-collapsible-text
if ( options.toggleText ) {
const collapseText = options.toggleText.collapseText;
const expandText = options.toggleText.expandText;
const $textContainer = $toggle.find( '.mw-collapsible-text' );
if ( $textContainer.length ) {
$textContainer.text( wasCollapsed ? collapseText : expandText );
}
}
// And finally toggle the element state itself
toggleElement( $collapsible, !!wasCollapsed, $toggle, options );
}
/**
* If the URL contains a hash followed by the fragment identifier of an
* element inside collapsed parents, expand them all and scroll to it.
*
* @private
*/
function hashHandler() {
const fragment = mw.util.getTargetFromFragment();
if ( !fragment ) {
// The fragment doesn't exist
return;
}
const $parents = $( fragment ).parents( '.mw-collapsed' );
if ( !$parents.length ) {
// The fragment is not in a collapsed element
return;
}
// Expand collapsed parents
$parents.each( function () {
const $collapsible = $( this );
if ( $collapsible.data( 'mw-made-collapsible' ) ) {
$collapsible.data( 'mw-collapsible' ).expand();
} else {
// The collapsible has not been initialized, so just prevent it
// from being collapsed
$collapsible.removeClass( 'mw-collapsed' );
}
} );
// Scroll to the fragment
fragment.scrollIntoView();
}
/**
* 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).
*
* To use this {@link jQuery} plugin, load the `jquery.makeCollapsible` module with {@link mw.loader}.
*
* @example
* mw.loader.using( 'jquery.makeCollapsible' ).then( () => {
* $( 'table' ).makeCollapsible();
* } );
* @param {Object} [options]
* @param {string} [options.collapseText] Text used for the toggler, when clicking it would
* collapse the element. Default: the 'data-collapsetext' attribute of the
* collapsible element or the content of 'collapsible-collapse' message.
* @param {string} [options.expandText] Text used for the toggler, when clicking it would
* expand the element. Default: the 'data-expandtext' attribute of the
* collapsible element or the content of 'collapsible-expand' message.
* @param {boolean} [options.collapsed] Whether to collapse immediately. By default
* collapse only if the element has the 'mw-collapsed' class.
* @param {jQuery} [options.$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}
* @memberof module:jquery.makeCollapsible
* @method
*/
$.fn.makeCollapsible = function ( options ) {
options = options || {};
this.each( function () {
// Ensure class "mw-collapsible" is present in case .makeCollapsible()
// is called on element(s) that don't have it yet.
const $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?
const collapseText = options.collapseText || $collapsible.attr( 'data-collapsetext' ) || mw.msg( 'collapsible-collapse' );
const expandText = options.expandText || $collapsible.attr( 'data-expandtext' ) || mw.msg( 'collapsible-expand' );
// Default click/keydown handler and toggle link to use when none is present
let actionHandler = function ( e, opts ) {
const defaultOpts = {
toggleClasses: true,
toggleARIA: true,
toggleText: { collapseText: collapseText, expandText: expandText }
};
opts = Object.assign( defaultOpts, options, opts );
// Take care of cloned content (e.g. in reference popups): if the toggle
// link is not inside the original collapsible, make it toggle the
// cloned collapsible (which we expect to be there) instead of
// original.
let $currentCollapsible = $.contains( $collapsible.get( 0 ), this ) ?
$collapsible :
$( this ).closest( '.mw-collapsible' );
// However, if we still can't find the collapsible, fallback to original
if ( $currentCollapsible.length === 0 ) {
$currentCollapsible = $collapsible;
}
togglingHandler( $( this ), $currentCollapsible, e, opts );
};
// Default toggle link. Only build it when needed to avoid jQuery memory leaks (event data).
const buildDefaultToggleLink = function () {
return $( '<span>' )
.addClass( 'mw-collapsible-text' )
.text( collapseText )
.wrap( '<button type="button" class="mw-collapsible-toggle mw-collapsible-toggle-default"></button>' )
.parent();
};
// Check if this element has a custom position for the toggle link
// (ie. outside the container or deeper inside the tree)
let $customTogglers;
if ( options.$customTogglers ) {
$customTogglers = $( options.$customTogglers );
} else {
let collapsibleId = $collapsible.attr( 'id' ) || '';
if ( collapsibleId.indexOf( 'mw-customcollapsible-' ) === 0 ) {
collapsibleId = $.escapeSelector( collapsibleId );
$customTogglers = $( '.' + collapsibleId.replace( 'mw-customcollapsible', 'mw-customtoggle' ) )
.addClass( 'mw-customtoggle' );
}
}
// Add event handlers to custom togglers or create our own ones
let $toggle;
if ( $customTogglers && $customTogglers.length ) {
actionHandler = function ( e, opts ) {
const defaultOpts = {};
opts = Object.assign( 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.
let $firstItem;
if ( $collapsible.is( 'table' ) ) {
// If the table has a caption, collapse to the caption
// as opposed to the first row
const $caption = $collapsible.find( '> caption' );
if ( $caption.length ) {
$toggle = $caption.find( '> .mw-collapsible-toggle, .mw-collapsible-toggle-placeholder' ).first();
// If there is no toggle link, add it to the end of the caption
if ( !$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().find( 'th, td' );
$toggle = $firstItem.find( '> .mw-collapsible-toggle, .mw-collapsible-toggle-placeholder' ).first();
// If theres no toggle link, add it to the last cell
if ( !$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, .mw-collapsible-toggle-placeholder' ).length === 0
) {
// special case of one collapsible in <li> 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 = $firstItem.find( '> .mw-collapsible-toggle, .mw-collapsible-toggle-placeholder' ).first();
// If theres no toggle link, add it
if ( !$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.
const firstval = $firstItem.prop( 'value' );
if ( firstval === undefined || !firstval || firstval === '-1' || firstval === -1 ) {
$firstItem.prop( 'value', '1' );
}
$toggle = buildDefaultToggleLink();
$toggle.wrap( '<li class="mw-collapsible-toggle-li"></li>' ).parent().prependTo( $collapsible );
}
} else { // <div>, <p> etc.
// The toggle-link will be the first child of the element
$toggle = $collapsible.find( '> .mw-collapsible-toggle, .mw-collapsible-toggle-placeholder' ).first();
// If a direct child .content-wrapper does not exists, create it
if ( !$collapsible.find( '> .mw-collapsible-content' ).length ) {
$collapsible.wrapInner( '<div class="mw-collapsible-content"></div>' );
}
// If theres no toggle link, add it
if ( !$toggle.length ) {
$toggle = buildDefaultToggleLink().prependTo( $collapsible );
}
}
}
// If the toggle is just a placeholder, replace it with a real one
// eslint-disable-next-line no-jquery/no-class-state
if ( $toggle.hasClass( 'mw-collapsible-toggle-placeholder' ) ) {
const $realToggle = buildDefaultToggleLink();
$toggle.replaceWith( $realToggle );
$toggle = $realToggle;
}
// Attach event handlers to togglelink
$toggle.on( 'click.mw-collapsible keydown.mw-collapsible', actionHandler )
.attr( 'aria-expanded', 'true' )
.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
// eslint-disable-next-line no-jquery/no-class-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 best way to handle that.
actionHandler.call( $toggle.get( 0 ), null, { wasCollapsed: false } );
}
} );
// Attach hash handler
window.addEventListener( 'hashchange', hashHandler );
/**
* Fired after collapsible content has been initialized.
*
* This gives an option to modify the collapsible behavior.
*
* @event ~'wikipage.collapsibleContent'
* @memberof Hooks
* @param {jQuery} $collapsible An element that has been made collapsible
*/
mw.hook( 'wikipage.collapsibleContent' ).fire( this );
return this;
};
// Run hash handler right now in case the URL already has a hash
hashHandler();
}() );