resources/jquery/jquery.makeCollapsible.js

   1 /**
   2  * jQuery makeCollapsible
   3  *
   4  * This will enable collapsible-functionality on all passed elements.
   5  * - Will prevent binding twice to the same element.
   6  * - Initial state is expanded by default, this can be overriden by adding class
   7  *   "mw-collapsed" to the "mw-collapsible" element.
   8  * - Elements made collapsible have jQuery data "mw-made-collapsible" set to true.
   9  * - The inner content is wrapped in a "div.mw-collapsible-content" (except for tables and lists).
  10  *
  11  * @author Krinkle, 2011-2012
  12  *
  13  * Dual license:
  14  * @license CC-BY 3.0 <http://creativecommons.org/licenses/by/3.0>
  15  * @license GPL2 <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
  16  */
  17 ( function ( $, mw ) {
  18         var lpx = 'jquery.makeCollapsible> ';
  19
  20         /**
  21          * @param {jQuery} $collapsible
  22          * @param {string} action The action this function will take ('expand' or 'collapse').
  23          * @param {jQuery|null} [optional] $defaultToggle
  24          * @param {Object|undefined} options
  25          */
  26         function toggleElement( $collapsible, action, $defaultToggle, options ) {
  27                 var $collapsibleContent, $containers, hookCallback;
  28                 options = options || {};
  29
  30                 // Validate parameters
  31
  32                 // $collapsible must be an instance of jQuery
  33                 if ( !$collapsible.jquery ) {
  34                         return;
  35                 }
  36                 if ( action !== 'expand' && action !== 'collapse' ) {
  37                         // action must be string with 'expand' or 'collapse'
  38                         return;
  39                 }
  40                 if ( $defaultToggle === undefined ) {
  41                         $defaultToggle = null;
  42                 }
  43                 if ( $defaultToggle !== null && !$defaultToggle.jquery ) {
  44                         // is optional (may be undefined), but if defined it must be an instance of jQuery.
  45                         // If it's not, abort right away.
  46                         // After this $defaultToggle is either null or a valid jQuery instance.
  47                         return;
  48                 }
  49
  50                 // Trigger a custom event to allow callers to hook to the collapsing/expanding,
  51                 // allowing the module to be testable, and making it possible to
  52                 // e.g. implement persistence via cookies
  53                 $collapsible.trigger( action === 'expand' ? 'beforeExpand.mw-collapsible' : 'beforeCollapse.mw-collapsible' );
  54                 hookCallback = function () {
  55                         $collapsible.trigger( action === 'expand' ? 'afterExpand.mw-collapsible' : 'afterCollapse.mw-collapsible' );
  56                 };
  57
  58                 // Handle different kinds of elements
  59
  60                 if ( !options.plainMode && $collapsible.is( 'table' ) ) {
  61                         // Tables
  62                         $containers = $collapsible.find( '> tbody > tr' );
  63                         if ( $defaultToggle ) {
  64                                 // Exclude table row containing togglelink
  65                                 $containers = $containers.not( $defaultToggle.closest( 'tr' ) );
  66                         }
  67
  68                         if ( action === 'collapse' ) {
  69                                 // Hide all table rows of this table
  70                                 // Slide doesn't work with tables, but fade does as of jQuery 1.1.3
  71                                 // http://stackoverflow.com/questions/467336#920480
  72                                 if ( options.instantHide ) {
  73                                         $containers.hide();
  74                                         hookCallback();
  75                                 } else {
  76                                         $containers.stop( true, true ).fadeOut( hookCallback );
  77                                 }
  78                         } else {
  79                                 $containers.stop( true, true ).fadeIn( hookCallback );
  80                         }
  81
  82                 } else if ( !options.plainMode && ( $collapsible.is( 'ul' ) || $collapsible.is( 'ol' ) ) ) {
  83                         // Lists
  84                         $containers = $collapsible.find( '> li' );
  85                         if ( $defaultToggle ) {
  86                                 // Exclude list-item containing togglelink
  87                                 $containers = $containers.not( $defaultToggle.parent() );
  88                         }
  89
  90                         if ( action === 'collapse' ) {
  91                                 if ( options.instantHide ) {
  92                                         $containers.hide();
  93                                         hookCallback();
  94                                 } else {
  95                                         $containers.stop( true, true ).slideUp( hookCallback );
  96                                 }
  97                         } else {
  98                                 $containers.stop( true, true ).slideDown( hookCallback );
  99                         }
 100
 101                 } else {
 102                         // Everything else: <div>, <p> etc.
 103                         $collapsibleContent = $collapsible.find( '> .mw-collapsible-content' );
 104
 105                         // If a collapsible-content is defined, act on it
 106                         if ( !options.plainMode && $collapsibleContent.length ) {
 107                                 if ( action === 'collapse' ) {
 108                                         if ( options.instantHide ) {
 109                                                 $collapsibleContent.hide();
 110                                                 hookCallback();
 111                                         } else {
 112                                                 $collapsibleContent.slideUp( hookCallback );
 113                                         }
 114                                 } else {
 115                                         $collapsibleContent.slideDown( hookCallback );
 116                                 }
 117
 118                         // Otherwise assume this is a customcollapse with a remote toggle
 119                         // .. and there is no collapsible-content because the entire element should be toggled
 120                         } else {
 121                                 if ( action === 'collapse' ) {
 122                                         if ( options.instantHide ) {
 123                                                 $collapsible.hide();
 124                                                 hookCallback();
 125                                         } else {
 126                                                 if ( $collapsible.is( 'tr' ) || $collapsible.is( 'td' ) || $collapsible.is( 'th' ) ) {
 127                                                         $collapsible.fadeOut( hookCallback );
 128                                                 } else {
 129                                                         $collapsible.slideUp( hookCallback );
 130                                                 }
 131                                         }
 132                                 } else {
 133                                         if ( $collapsible.is( 'tr' ) || $collapsible.is( 'td' ) || $collapsible.is( 'th' ) ) {
 134                                                 $collapsible.fadeIn( hookCallback );
 135                                         } else {
 136                                                 $collapsible.slideDown( hookCallback );
 137                                         }
 138                                 }
 139                         }
 140                 }
 141         }
 142
 143         /**
 144          * Handles clicking on the collapsible element toggle and other
 145          * situations where a collapsible element is toggled (e.g. the initial
 146          * toggle for collapsed ones).
 147          *
 148          * @param {jQuery} $toggle the clickable toggle itself
 149          * @param {jQuery} $collapsible the collapsible element
 150          * @param {jQuery.Event|null} e either the event or null if unavailable
 151          * @param {Object|undefined} options
 152          */
 153         function togglingHandler( $toggle, $collapsible, e, options ) {
 154                 var wasCollapsed, $textContainer, collapseText, expandText;
 155
 156                 if ( options === undefined ) {
 157                         options = {};
 158                 }
 159
 160                 if ( e ) {
 161                         // Don't fire if a link was clicked, if requested  (for premade togglers by default)
 162                         if ( options.linksPassthru && $.nodeName( e.target, 'a' ) ) {
 163                                 return;
 164                         } else {
 165                                 e.preventDefault();
 166                                 e.stopPropagation();
 167                         }
 168                 }
 169
 170                 wasCollapsed = $collapsible.hasClass( 'mw-collapsed' );
 171
 172                 // Toggle the state of the collapsible element (that is, expand or collapse)
 173                 $collapsible.toggleClass( 'mw-collapsed', !wasCollapsed );
 174
 175                 // Toggle the mw-collapsible-toggle classes, if requested (for default and premade togglers by default)
 176                 if ( options.toggleClasses ) {
 177                         $toggle
 178                                 .toggleClass( 'mw-collapsible-toggle-collapsed', !wasCollapsed )
 179                                 .toggleClass( 'mw-collapsible-toggle-expanded', wasCollapsed );
 180                 }
 181
 182                 // Toggle the text ("Show"/"Hide"), if requested (for default togglers by default)
 183                 if ( options.toggleText ) {
 184                         collapseText = options.toggleText.collapseText;
 185                         expandText = options.toggleText.expandText;
 186
 187                         $textContainer = $toggle.find( '> a' );
 188                         if ( !$textContainer.length ) {
 189                                 $textContainer = $toggle;
 190                         }
 191                         $textContainer.text( wasCollapsed ? collapseText : expandText );
 192                 }
 193
 194                 // And finally toggle the element state itself
 195                 toggleElement( $collapsible, wasCollapsed ? 'expand' : 'collapse', $toggle, options );
 196         }
 197
 198         /**
 199          * Toggles collapsible and togglelink class and updates text label.
 200          *
 201          * @param {jQuery} $that
 202          * @param {jQuery.Event} e
 203          * @param {Object|undefined} options
 204          */
 205         function toggleLinkDefault( $that, e, options ) {
 206                 var $collapsible = $that.closest( '.mw-collapsible' );
 207                 options = $.extend( { toggleClasses: true }, options );
 208                 togglingHandler( $that, $collapsible, e, options );
 209         }
 210
 211         /**
 212          * Toggles collapsible and togglelink class.
 213          *
 214          * @param {jQuery} $that
 215          * @param {jQuery.Event} e
 216          * @param {Object|undefined} options
 217          */
 218         function toggleLinkPremade( $that, e, options ) {
 219                 var $collapsible = $that.eq( 0 ).closest( '.mw-collapsible' );
 220                 options = $.extend( { toggleClasses: true, linksPassthru: true }, options );
 221                 togglingHandler( $that, $collapsible, e, options );
 222         }
 223
 224         /**
 225          * Toggles customcollapsible.
 226          *
 227          * @param {jQuery} $that
 228          * @param {jQuery.Event} e
 229          * @param {Object|undefined} options
 230          * @param {jQuery} $collapsible
 231          */
 232         function toggleLinkCustom( $that, e, options, $collapsible ) {
 233                 togglingHandler( $that, $collapsible, e, options );
 234         }
 235
 236         /**
 237          * Make any element collapsible.
 238          *
 239          * Supported options:
 240          * - collapseText: text to be used for the toggler when clicking it would
 241          *   collapse the element. Default: the 'data-collapsetext' attribute of
 242          *   the collapsible element or the content of 'collapsible-collapse'
 243          *   message.
 244          * - expandText: text to be used for the toggler when clicking it would
 245          *   expand the element. Default: the 'data-expandtext' attribute of
 246          *   the collapsible element or the content of 'collapsible-expand'
 247          *   message.
 248          * - collapsed: boolean, whether to collapse immediately. By default
 249          *   collapse only if the elements has the 'mw-collapsible' class.
 250          * - $customTogglers: jQuerified list of elements to be used as togglers
 251          *   for this collapsible element. By default, if the collapsible element
 252          *   has an id attribute like 'mw-customcollapsible-XXX', elements with a
 253          *   *class* of 'mw-customtoggle-XXX' are made togglers for it.
 254          * - plainMode: boolean, whether to use a "plain mode" when making the
 255          *   element collapsible - that is, hide entire tables and lists (instead
 256          *   of hiding only all rows but first of tables, and hiding each list
 257          *   item separately for lists) and don't wrap other elements in
 258          *   div.mw-collapsible-content. May only be used with custom togglers.
 259          */
 260         $.fn.makeCollapsible = function ( options ) {
 261                 return this.each(function () {
 262                         var $collapsible, collapsetext, expandtext, $toggle, $toggleLink, $firstItem, collapsibleId,
 263                                 $customTogglers, firstval;
 264
 265                         if ( options === undefined ) {
 266                                 options = {};
 267                         }
 268
 269                         // Ensure class "mw-collapsible" is present in case .makeCollapsible()
 270                         // is called on element(s) that don't have it yet.
 271                         $collapsible = $(this).addClass( 'mw-collapsible' );
 272
 273                         // Return if it has been enabled already.
 274                         if ( $collapsible.data( 'mw-made-collapsible' ) ) {
 275                                 return;
 276                         } else {
 277                                 $collapsible.data( 'mw-made-collapsible', true );
 278                         }
 279
 280                         // Use custom text or default?
 281                         collapsetext = options.collapseText || $collapsible.attr( 'data-collapsetext' ) || mw.msg( 'collapsible-collapse' );
 282                         expandtext = options.expandText || $collapsible.attr( 'data-expandtext' ) || mw.msg( 'collapsible-expand' );
 283
 284                         // Create toggle link with a space around the brackets (&nbsp;[text]&nbsp;)
 285                         $toggleLink =
 286                                 $( '<a href="#"></a>' )
 287                                         .text( collapsetext )
 288                                         .wrap( '<span class="mw-collapsible-toggle"></span>' )
 289                                                 .parent()
 290                                                 .prepend( '&nbsp;[' )
 291                                                 .append( ']&nbsp;' )
 292                                                 .on( 'click.mw-collapsible', function ( e, opts ) {
 293                                                         opts = $.extend( { toggleText: { collapseText: collapsetext, expandText: expandtext } }, options, opts );
 294                                                         toggleLinkDefault( $(this), e, opts );
 295                                                 } );
 296
 297                         // Check if this element has a custom position for the toggle link
 298                         // (ie. outside the container or deeper inside the tree)
 299                         if ( options.$customTogglers ) {
 300                                 $customTogglers = $( options.$customTogglers );
 301                         } else {
 302                                 collapsibleId = $collapsible.attr( 'id' ) || '';
 303                                 if ( collapsibleId.indexOf( 'mw-customcollapsible-' ) === 0 ) {
 304                                         mw.log( lpx + 'Found custom collapsible: #' + collapsibleId );
 305                                         $customTogglers = $( '.' + collapsibleId.replace( 'mw-customcollapsible', 'mw-customtoggle' ) );
 306
 307                                         // Double check that there is actually a customtoggle link
 308                                         if ( !$customTogglers.length ) {
 309                                                 mw.log( lpx + '#' + collapsibleId + ': Missing toggler!' );
 310                                         }
 311                                 }
 312                         }
 313
 314                         // Bind the custom togglers
 315                         if ( $customTogglers && $customTogglers.length ) {
 316                                 $customTogglers.on( 'click.mw-collapsible', function ( e, opts ) {
 317                                         opts = $.extend( {}, options, opts );
 318                                         toggleLinkCustom( $(this), e, opts, $collapsible );
 319                                 } );
 320
 321                                 // Initial state
 322                                 if ( options.collapsed || $collapsible.hasClass( 'mw-collapsed' ) ) {
 323                                         // Remove here so that the toggler goes in the right direction,
 324                                         // It re-adds the class.
 325                                         $collapsible.removeClass( 'mw-collapsed' );
 326                                         toggleLinkCustom( $customTogglers, null, $.extend( { instantHide: true }, options ), $collapsible );
 327                                 }
 328
 329                         // If this is not a custom case, do the default:
 330                         // Wrap the contents and add the toggle link
 331                         } else {
 332                                 // Elements are treated differently
 333                                 if ( $collapsible.is( 'table' ) ) {
 334                                         // The toggle-link will be in one the the cells (td or th) of the first row
 335                                         $firstItem = $collapsible.find( 'tr:first th, tr:first td' );
 336                                         $toggle = $firstItem.find( '> .mw-collapsible-toggle' );
 337
 338                                         // If theres no toggle link, add it to the last cell
 339                                         if ( !$toggle.length ) {
 340                                                 $firstItem.eq(-1).prepend( $toggleLink );
 341                                         } else {
 342                                                 $toggleLink = $toggle.off( 'click.mw-collapsible' ).on( 'click.mw-collapsible', function ( e, opts ) {
 343                                                         opts = $.extend( {}, options, opts );
 344                                                         toggleLinkPremade( $toggle, e, opts );
 345                                                 } );
 346                                         }
 347
 348                                 } else if ( $collapsible.is( 'ul' ) || $collapsible.is( 'ol' ) ) {
 349                                         // The toggle-link will be in the first list-item
 350                                         $firstItem = $collapsible.find( 'li:first' );
 351                                         $toggle = $firstItem.find( '> .mw-collapsible-toggle' );
 352
 353                                         // If theres no toggle link, add it
 354                                         if ( !$toggle.length ) {
 355                                                 // Make sure the numeral order doesn't get messed up, force the first (soon to be second) item
 356                                                 // to be "1". Except if the value-attribute is already used.
 357                                                 // If no value was set WebKit returns "", Mozilla returns '-1', others return null or undefined.
 358                                                 firstval = $firstItem.attr( 'value' );
 359                                                 if ( firstval === undefined || !firstval || firstval === '-1' || firstval === -1 ) {
 360                                                         $firstItem.attr( 'value', '1' );
 361                                                 }
 362                                                 $collapsible.prepend( $toggleLink.wrap( '<li class="mw-collapsible-toggle-li"></li>' ).parent() );
 363                                         } else {
 364                                                 $toggleLink = $toggle.off( 'click.mw-collapsible' ).on( 'click.mw-collapsible', function ( e, opts ) {
 365                                                         opts = $.extend( {}, options, opts );
 366                                                         toggleLinkPremade( $toggle, e, opts );
 367                                                 } );
 368                                         }
 369
 370                                 } else { // <div>, <p> etc.
 371
 372                                         // The toggle-link will be the first child of the element
 373                                         $toggle = $collapsible.find( '> .mw-collapsible-toggle' );
 374
 375                                         // If a direct child .content-wrapper does not exists, create it
 376                                         if ( !$collapsible.find( '> .mw-collapsible-content' ).length ) {
 377                                                 $collapsible.wrapInner( '<div class="mw-collapsible-content"></div>' );
 378                                         }
 379
 380                                         // If theres no toggle link, add it
 381                                         if ( !$toggle.length ) {
 382                                                 $collapsible.prepend( $toggleLink );
 383                                         } else {
 384                                                 $toggleLink = $toggle.off( 'click.mw-collapsible' ).on( 'click.mw-collapsible', function ( e, opts ) {
 385                                                         opts = $.extend( {}, options, opts );
 386                                                         toggleLinkPremade( $toggle, e, opts );
 387                                                 } );
 388                                         }
 389                                 }
 390                         }
 391
 392                         // Initial state (only for those that are not custom,
 393                         // because the initial state of those has been taken care of already).
 394                         if (
 395                                 ( options.collapsed || $collapsible.hasClass( 'mw-collapsed' ) ) &&
 396                                 ( !$customTogglers || !$customTogglers.length )
 397                         ) {
 398                                 $collapsible.removeClass( 'mw-collapsed' );
 399                                 // The collapsible element could have multiple togglers
 400                                 // To toggle the initial state only click one of them (ie. the first one, eq(0) )
 401                                 // Else it would go like: hide,show,hide,show for each toggle link.
 402                                 // This is just like it would be in reality (only one toggle is clicked at a time).
 403                                 $toggleLink.eq( 0 ).trigger( 'click', [ { instantHide: true } ] );
 404                         }
 405                 } );
 406         };
 407 }( jQuery, mediaWiki ) );