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/**
* jQuery makeCollapsible
*
* Dual licensed:
* - CC BY 3.0 <http://creativecommons.org/licenses/by/3.0>
* - GPL2 <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
*
* @class jQuery.plugin.makeCollapsible
*/
( function ( $, mw ) {
/**
* 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;
}
if ( $defaultToggle !== null && !$defaultToggle.jquery ) {
// is optional (may be undefined), but if defined it must be an instance of jQuery.
// If it's not, abort right away.
// After this $defaultToggle is either null or a valid jQuery instance.
return;
}
// 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' ) );
}
if ( action === 'collapse' ) {
// Hide all table rows of this table
// Slide doesn't work with tables, but fade does as of jQuery 1.1.3
// http://stackoverflow.com/questions/467336#920480
if ( options.instantHide ) {
$containers.hide();
hookCallback();
} else {
$containers.stop( true, true ).fadeOut().promise().done( hookCallback );
}
} else {
$containers.stop( true, true ).fadeIn().promise().done( hookCallback );
}
} 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() );
}
if ( action === 'collapse' ) {
if ( options.instantHide ) {
$containers.hide();
hookCallback();
} else {
$containers.stop( true, true ).slideUp().promise().done( hookCallback );
}
} else {
$containers.stop( true, true ).slideDown().promise().done( hookCallback );
}
} else {
// Everything else: <div>, <p> etc.
$collapsibleContent = $collapsible.find( '> .mw-collapsible-content' );
// If a collapsible-content is defined, act on it
if ( !options.plainMode && $collapsibleContent.length ) {
if ( action === 'collapse' ) {
if ( options.instantHide ) {
$collapsibleContent.hide();
hookCallback();
} else {
$collapsibleContent.slideUp().promise().done( hookCallback );
}
} else {
$collapsibleContent.slideDown().promise().done( hookCallback );
}
// Otherwise assume this is a customcollapse with a remote toggle
// .. and there is no collapsible-content because the entire element should be toggled
} else {
if ( action === 'collapse' ) {
if ( options.instantHide ) {
$collapsible.hide();
hookCallback();
} else {
if ( $collapsible.is( 'tr' ) || $collapsible.is( 'td' ) || $collapsible.is( 'th' ) ) {
$collapsible.fadeOut().promise().done( hookCallback );
} else {
$collapsible.slideUp().promise().done( hookCallback );
}
}
} else {
if ( $collapsible.is( 'tr' ) || $collapsible.is( 'td' ) || $collapsible.is( 'th' ) ) {
$collapsible.fadeIn().promise().done( hookCallback );
} else {
$collapsible.slideDown().promise().done( 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' &&
options.linksPassthru &&
$.nodeName( e.target, 'a' ) &&
$( e.target ).attr( 'href' ) &&
$( e.target ).attr( 'href' ) !== '#'
) {
// Don't fire if a link with href !== '#' was clicked, if requested (for premade togglers by default)
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"), if requested (for default togglers by default)
if ( options.toggleText ) {
collapseText = options.toggleText.collapseText;
expandText = options.toggleText.expandText;
$textContainer = $toggle.find( '> a' );
if ( !$textContainer.length ) {
$textContainer = $toggle;
}
$textContainer.text( wasCollapsed ? collapseText : expandText );
}
// And finally toggle the element state itself
toggleElement( $collapsible, wasCollapsed ? 'expand' : 'collapse', $toggle, options );
}
/**
* Enable collapsible-functionality on all elements in the collection.
*
* - Will prevent binding twice to the same element.
* - Initial state is expanded by default, this can be overridden by adding class
* "mw-collapsed" to the "mw-collapsible" element.
* - Elements made collapsible have jQuery data "mw-made-collapsible" set to true.
* - The inner content is wrapped in a "div.mw-collapsible-content" (except for tables and lists).
*
* @param {Object} [options]
* @param {string} [options.collapseText] Text used for the toggler, when clicking it would
* collapse the element. Default: the 'data-collapsetext' attribute of the
* collapsible element or the content of 'collapsible-collapse' message.
* @param {string} [options.expandText] Text used for the toggler, when clicking it would
* expand the element. Default: the 'data-expandtext' attribute of the
* collapsible element or the content of 'collapsible-expand' message.
* @param {boolean} [options.collapsed] Whether to collapse immediately. By default
* collapse only if the elements has the 'mw-collapsible' class.
* @param {jQuery} [options.$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,
premadeToggleHandler, $toggleLink, $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 {
$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 href="#"></a>' )
.text( collapseText )
.wrap( '<span class="mw-collapsible-toggle"></span>' )
.parent()
.prepend( '<span class="mw-collapsible-bracket">[</span>' )
.append( '<span class="mw-collapsible-bracket">]</span>' )
.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler );
};
// Default handler for clicking on premade toggles
premadeToggleHandler = function ( e, opts ) {
var defaultOpts = { toggleClasses: true, linksPassthru: true };
opts = $.extend( defaultOpts, options, opts );
togglingHandler( $( this ), $collapsible, e, opts );
};
// Check if this element has a custom position for the toggle link
// (ie. outside the container or deeper inside the tree)
if ( options.$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 );
};
$toggleLink = $customTogglers
.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
.prop( 'tabIndex', 0 );
} 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 ) {
$toggleLink = buildDefaultToggleLink().appendTo( $caption );
} else {
actionHandler = premadeToggleHandler;
$toggleLink = $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
.prop( 'tabIndex', 0 );
}
} 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 ) {
$toggleLink = buildDefaultToggleLink().prependTo( $firstItem.eq( -1 ) );
} else {
actionHandler = premadeToggleHandler;
$toggleLink = $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
.prop( 'tabIndex', 0 );
}
}
} 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' );
}
$toggleLink = buildDefaultToggleLink();
$toggleLink.wrap( '<li class="mw-collapsible-toggle-li"></li>' ).parent().prependTo( $collapsible );
} else {
actionHandler = premadeToggleHandler;
$toggleLink = $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
.prop( 'tabIndex', 0 );
}
} else { // <div>, <p> 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 ) {
$collapsible.wrapInner( '<div class="mw-collapsible-content"></div>' );
}
// If theres no toggle link, add it
if ( !$toggle.length ) {
$toggleLink = buildDefaultToggleLink().prependTo( $collapsible );
} else {
actionHandler = premadeToggleHandler;
$toggleLink = $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
.prop( 'tabIndex', 0 );
}
}
}
$( this ).data( 'mw-collapsible', {
collapse: function () {
actionHandler.call( $toggleLink.get( 0 ), null, { instantHide: true, wasCollapsed: false } );
},
expand: function () {
actionHandler.call( $toggleLink.get( 0 ), null, { instantHide: true, wasCollapsed: true } );
},
toggle: function () {
actionHandler.call( $toggleLink.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( $toggleLink.get( 0 ), null, { instantHide: true, 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
*/
}( jQuery, mediaWiki ) );