resources/src/jquery/jquery.makeCollapsible.js

   1 /**
   2  * jQuery makeCollapsible
   3  *
   4  * Dual licensed:
   5  * - CC BY 3.0 <http://creativecommons.org/licenses/by/3.0>
   6  * - GPL2 <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
   7  *
   8  * @class jQuery.plugin.makeCollapsible
   9  */
  10 ( function ( $, mw ) {
  11
  12         /**
  13          * Handler for a click on a collapsible toggler.
  14          *
  15          * @private
  16          * @param {jQuery} $collapsible
  17          * @param {string} action The action this function will take ('expand' or 'collapse').
  18          * @param {jQuery|null} [$defaultToggle]
  19          * @param {Object|undefined} [options]
  20          */
  21         function toggleElement( $collapsible, action, $defaultToggle, options ) {
  22                 var $collapsibleContent, $containers, hookCallback;
  23                 options = options || {};
  24
  25                 // Validate parameters
  26
  27                 // $collapsible must be an instance of jQuery
  28                 if ( !$collapsible.jquery ) {
  29                         return;
  30                 }
  31                 if ( action !== 'expand' && action !== 'collapse' ) {
  32                         // action must be string with 'expand' or 'collapse'
  33                         return;
  34                 }
  35                 if ( $defaultToggle === undefined ) {
  36                         $defaultToggle = null;
  37                 }
  38
  39                 // Trigger a custom event to allow callers to hook to the collapsing/expanding,
  40                 // allowing the module to be testable, and making it possible to
  41                 // e.g. implement persistence via cookies
  42                 $collapsible.trigger( action === 'expand' ? 'beforeExpand.mw-collapsible' : 'beforeCollapse.mw-collapsible' );
  43                 hookCallback = function () {
  44                         $collapsible.trigger( action === 'expand' ? 'afterExpand.mw-collapsible' : 'afterCollapse.mw-collapsible' );
  45                 };
  46
  47                 // Handle different kinds of elements
  48
  49                 if ( !options.plainMode && $collapsible.is( 'table' ) ) {
  50                         // Tables
  51                         // If there is a caption, hide all rows; otherwise, only hide body rows
  52                         if ( $collapsible.find( '> caption' ).length ) {
  53                                 $containers = $collapsible.find( '> * > tr' );
  54                         } else {
  55                                 $containers = $collapsible.find( '> tbody > tr' );
  56                         }
  57                         if ( $defaultToggle ) {
  58                                 // Exclude table row containing togglelink
  59                                 $containers = $containers.not( $defaultToggle.closest( 'tr' ) );
  60                         }
  61
  62                         if ( action === 'collapse' ) {
  63                                 // Hide all table rows of this table
  64                                 // Slide doesn't work with tables, but fade does as of jQuery 1.1.3
  65                                 // http://stackoverflow.com/questions/467336#920480
  66                                 if ( options.instantHide ) {
  67                                         $containers.hide();
  68                                         hookCallback();
  69                                 } else {
  70                                         $containers.stop( true, true ).fadeOut().promise().done( hookCallback );
  71                                 }
  72                         } else {
  73                                 $containers.stop( true, true ).fadeIn().promise().done( hookCallback );
  74                         }
  75
  76                 } else if ( !options.plainMode && ( $collapsible.is( 'ul' ) || $collapsible.is( 'ol' ) ) ) {
  77                         // Lists
  78                         $containers = $collapsible.find( '> li' );
  79                         if ( $defaultToggle ) {
  80                                 // Exclude list-item containing togglelink
  81                                 $containers = $containers.not( $defaultToggle.parent() );
  82                         }
  83
  84                         if ( action === 'collapse' ) {
  85                                 if ( options.instantHide ) {
  86                                         $containers.hide();
  87                                         hookCallback();
  88                                 } else {
  89                                         $containers.stop( true, true ).slideUp().promise().done( hookCallback );
  90                                 }
  91                         } else {
  92                                 $containers.stop( true, true ).slideDown().promise().done( hookCallback );
  93                         }
  94
  95                 } else {
  96                         // Everything else: <div>, <p> etc.
  97                         $collapsibleContent = $collapsible.find( '> .mw-collapsible-content' );
  98
  99                         // If a collapsible-content is defined, act on it
 100                         if ( !options.plainMode && $collapsibleContent.length ) {
 101                                 if ( action === 'collapse' ) {
 102                                         if ( options.instantHide ) {
 103                                                 $collapsibleContent.hide();
 104                                                 hookCallback();
 105                                         } else {
 106                                                 $collapsibleContent.slideUp().promise().done( hookCallback );
 107                                         }
 108                                 } else {
 109                                         $collapsibleContent.slideDown().promise().done( hookCallback );
 110                                 }
 111
 112                         // Otherwise assume this is a customcollapse with a remote toggle
 113                         // .. and there is no collapsible-content because the entire element should be toggled
 114                         } else {
 115                                 if ( action === 'collapse' ) {
 116                                         if ( options.instantHide ) {
 117                                                 $collapsible.hide();
 118                                                 hookCallback();
 119                                         } else {
 120                                                 if ( $collapsible.is( 'tr' ) || $collapsible.is( 'td' ) || $collapsible.is( 'th' ) ) {
 121                                                         $collapsible.fadeOut().promise().done( hookCallback );
 122                                                 } else {
 123                                                         $collapsible.slideUp().promise().done( hookCallback );
 124                                                 }
 125                                         }
 126                                 } else {
 127                                         if ( $collapsible.is( 'tr' ) || $collapsible.is( 'td' ) || $collapsible.is( 'th' ) ) {
 128                                                 $collapsible.fadeIn().promise().done( hookCallback );
 129                                         } else {
 130                                                 $collapsible.slideDown().promise().done( hookCallback );
 131                                         }
 132                                 }
 133                         }
 134                 }
 135         }
 136
 137         /**
 138          * Handle clicking/keypressing on the collapsible element toggle and other
 139          * situations where a collapsible element is toggled (e.g. the initial
 140          * toggle for collapsed ones).
 141          *
 142          * @private
 143          * @param {jQuery} $toggle the clickable toggle itself
 144          * @param {jQuery} $collapsible the collapsible element
 145          * @param {jQuery.Event|null} e either the event or null if unavailable
 146          * @param {Object|undefined} options
 147          */
 148         function togglingHandler( $toggle, $collapsible, e, options ) {
 149                 var wasCollapsed, $textContainer, collapseText, expandText;
 150                 options = options || {};
 151
 152                 if ( e ) {
 153                         if (
 154                                 e.type === 'click' &&
 155                                 e.target.nodeName.toLowerCase() === 'a' &&
 156                                 $( e.target ).attr( 'href' )
 157                         ) {
 158                                 // Don't fire if a link was clicked (for premade togglers)
 159                                 return;
 160                         } else if ( e.type === 'keypress' && e.which !== 13 && e.which !== 32 ) {
 161                                 // Only handle keypresses on the "Enter" or "Space" keys
 162                                 return;
 163                         } else {
 164                                 e.preventDefault();
 165                                 e.stopPropagation();
 166                         }
 167                 }
 168
 169                 // This allows the element to be hidden on initial toggle without fiddling with the class
 170                 if ( options.wasCollapsed !== undefined ) {
 171                         wasCollapsed = options.wasCollapsed;
 172                 } else {
 173                         wasCollapsed = $collapsible.hasClass( 'mw-collapsed' );
 174                 }
 175
 176                 // Toggle the state of the collapsible element (that is, expand or collapse)
 177                 $collapsible.toggleClass( 'mw-collapsed', !wasCollapsed );
 178
 179                 // Toggle the mw-collapsible-toggle classes, if requested (for default and premade togglers by default)
 180                 if ( options.toggleClasses ) {
 181                         $toggle
 182                                 .toggleClass( 'mw-collapsible-toggle-collapsed', !wasCollapsed )
 183                                 .toggleClass( 'mw-collapsible-toggle-expanded', wasCollapsed );
 184                 }
 185
 186                 // Toggle the text ("Show"/"Hide") within elements tagged with mw-collapsible-text
 187                 if ( options.toggleText ) {
 188                         collapseText = options.toggleText.collapseText;
 189                         expandText = options.toggleText.expandText;
 190
 191                         $textContainer = $collapsible.find( '.mw-collapsible-text' );
 192                         if ( $textContainer.length ) {
 193                                 $textContainer.text( wasCollapsed ? collapseText : expandText );
 194                         }
 195                 }
 196
 197                 // And finally toggle the element state itself
 198                 toggleElement( $collapsible, wasCollapsed ? 'expand' : 'collapse', $toggle, options );
 199         }
 200
 201         /**
 202          * Enable collapsible-functionality on all elements in the collection.
 203          *
 204          * - Will prevent binding twice to the same element.
 205          * - Initial state is expanded by default, this can be overridden by adding class
 206          *   "mw-collapsed" to the "mw-collapsible" element.
 207          * - Elements made collapsible have jQuery data "mw-made-collapsible" set to true.
 208          * - The inner content is wrapped in a "div.mw-collapsible-content" (except for tables and lists).
 209          *
 210          * @param {Object} [options]
 211          * @param {string} [options.collapseText] Text used for the toggler, when clicking it would
 212          *   collapse the element. Default: the 'data-collapsetext' attribute of the
 213          *   collapsible element or the content of 'collapsible-collapse' message.
 214          * @param {string} [options.expandText] Text used for the toggler, when clicking it would
 215          *   expand the element. Default: the 'data-expandtext' attribute of the
 216          *   collapsible element or the content of 'collapsible-expand' message.
 217          * @param {boolean} [options.collapsed] Whether to collapse immediately. By default
 218          *   collapse only if the elements has the 'mw-collapsible' class.
 219          * @param {jQuery} [options.$customTogglers] Elements to be used as togglers
 220          *   for this collapsible element. By default, if the collapsible element
 221          *   has an id attribute like 'mw-customcollapsible-XXX', elements with a
 222          *   *class* of 'mw-customtoggle-XXX' are made togglers for it.
 223          * @param {boolean} [options.plainMode=false] Whether to use a "plain mode" when making the
 224          *   element collapsible - that is, hide entire tables and lists (instead
 225          *   of hiding only all rows but first of tables, and hiding each list
 226          *   item separately for lists) and don't wrap other elements in
 227          *   div.mw-collapsible-content. May only be used with custom togglers.
 228          * @return {jQuery}
 229          * @chainable
 230          */
 231         $.fn.makeCollapsible = function ( options ) {
 232                 options = options || {};
 233
 234                 this.each( function () {
 235                         var $collapsible, collapseText, expandText, $caption, $toggle, actionHandler, buildDefaultToggleLink,
 236                                 $toggleLink, $firstItem, collapsibleId, $customTogglers, firstval;
 237
 238                         // Ensure class "mw-collapsible" is present in case .makeCollapsible()
 239                         // is called on element(s) that don't have it yet.
 240                         $collapsible = $( this ).addClass( 'mw-collapsible' );
 241
 242                         // Return if it has been enabled already.
 243                         if ( $collapsible.data( 'mw-made-collapsible' ) ) {
 244                                 return;
 245                         } else {
 246                                 $collapsible.data( 'mw-made-collapsible', true );
 247                         }
 248
 249                         // Use custom text or default?
 250                         collapseText = options.collapseText || $collapsible.attr( 'data-collapsetext' ) || mw.msg( 'collapsible-collapse' );
 251                         expandText = options.expandText || $collapsible.attr( 'data-expandtext' ) || mw.msg( 'collapsible-expand' );
 252
 253                         // Default click/keypress handler and toggle link to use when none is present
 254                         actionHandler = function ( e, opts ) {
 255                                 var defaultOpts = {
 256                                         toggleClasses: true,
 257                                         toggleText: { collapseText: collapseText, expandText: expandText }
 258                                 };
 259                                 opts = $.extend( defaultOpts, options, opts );
 260                                 togglingHandler( $( this ), $collapsible, e, opts );
 261                         };
 262
 263                         // Default toggle link. Only build it when needed to avoid jQuery memory leaks (event data).
 264                         buildDefaultToggleLink = function () {
 265                                 return $( '<a class="mw-collapsible-text"></a>' )
 266                                         .text( collapseText )
 267                                         .wrap( '<span class="mw-collapsible-toggle"></span>' )
 268                                         .parent()
 269                                         .attr( {
 270                                                 role: 'button',
 271                                                 tabindex: 0
 272                                         } )
 273                                         .prepend( '<span>[</span>' )
 274                                         .append( '<span>]</span>' )
 275                                         .on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler );
 276                         };
 277
 278                         // Check if this element has a custom position for the toggle link
 279                         // (ie. outside the container or deeper inside the tree)
 280                         if ( options.$customTogglers ) {
 281                                 $customTogglers = $( options.$customTogglers );
 282                         } else {
 283                                 collapsibleId = $collapsible.attr( 'id' ) || '';
 284                                 if ( collapsibleId.indexOf( 'mw-customcollapsible-' ) === 0 ) {
 285                                         $customTogglers = $( '.' + collapsibleId.replace( 'mw-customcollapsible', 'mw-customtoggle' ) )
 286                                                 .addClass( 'mw-customtoggle' );
 287                                 }
 288                         }
 289
 290                         // Add event handlers to custom togglers or create our own ones
 291                         if ( $customTogglers && $customTogglers.length ) {
 292                                 actionHandler = function ( e, opts ) {
 293                                         var defaultOpts = {};
 294                                         opts = $.extend( defaultOpts, options, opts );
 295                                         togglingHandler( $( this ), $collapsible, e, opts );
 296                                 };
 297
 298                                 $toggleLink = $customTogglers
 299                                         .on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
 300                                         .prop( 'tabIndex', 0 );
 301
 302                         } else {
 303                                 // If this is not a custom case, do the default: wrap the
 304                                 // contents and add the toggle link. Different elements are
 305                                 // treated differently.
 306
 307                                 if ( $collapsible.is( 'table' ) ) {
 308
 309                                         // If the table has a caption, collapse to the caption
 310                                         // as opposed to the first row
 311                                         $caption = $collapsible.find( '> caption' );
 312                                         if ( $caption.length ) {
 313                                                 $toggle = $caption.find( '> .mw-collapsible-toggle' );
 314
 315                                                 // If there is no toggle link, add it to the end of the caption
 316                                                 if ( !$toggle.length ) {
 317                                                         $toggleLink = buildDefaultToggleLink().appendTo( $caption );
 318                                                 } else {
 319                                                         $toggleLink = $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
 320                                                                 .prop( 'tabIndex', 0 );
 321                                                 }
 322                                         } else {
 323                                                 // The toggle-link will be in one of the cells (td or th) of the first row
 324                                                 $firstItem = $collapsible.find( 'tr:first th, tr:first td' );
 325                                                 $toggle = $firstItem.find( '> .mw-collapsible-toggle' );
 326
 327                                                 // If theres no toggle link, add it to the last cell
 328                                                 if ( !$toggle.length ) {
 329                                                         $toggleLink = buildDefaultToggleLink().prependTo( $firstItem.eq( -1 ) );
 330                                                 } else {
 331                                                         $toggleLink = $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
 332                                                                 .prop( 'tabIndex', 0 );
 333                                                 }
 334                                         }
 335
 336                                 } else if ( $collapsible.parent().is( 'li' ) &&
 337                                         $collapsible.parent().children( '.mw-collapsible' ).length === 1 &&
 338                                         $collapsible.find( '> .mw-collapsible-toggle' ).length === 0
 339                                 ) {
 340                                         // special case of one collapsible in <li> tag
 341                                         $toggleLink = buildDefaultToggleLink();
 342                                         $collapsible.before( $toggleLink );
 343                                 } else if ( $collapsible.is( 'ul' ) || $collapsible.is( 'ol' ) ) {
 344                                         // The toggle-link will be in the first list-item
 345                                         $firstItem = $collapsible.find( 'li:first' );
 346                                         $toggle = $firstItem.find( '> .mw-collapsible-toggle' );
 347
 348                                         // If theres no toggle link, add it
 349                                         if ( !$toggle.length ) {
 350                                                 // Make sure the numeral order doesn't get messed up, force the first (soon to be second) item
 351                                                 // to be "1". Except if the value-attribute is already used.
 352                                                 // If no value was set WebKit returns "", Mozilla returns '-1', others return 0, null or undefined.
 353                                                 firstval = $firstItem.prop( 'value' );
 354                                                 if ( firstval === undefined || !firstval || firstval === '-1' || firstval === -1 ) {
 355                                                         $firstItem.prop( 'value', '1' );
 356                                                 }
 357                                                 $toggleLink = buildDefaultToggleLink();
 358                                                 $toggleLink.wrap( '<li class="mw-collapsible-toggle-li"></li>' ).parent().prependTo( $collapsible );
 359                                         } else {
 360                                                 $toggleLink = $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
 361                                                         .prop( 'tabIndex', 0 );
 362                                         }
 363
 364                                 } else { // <div>, <p> etc.
 365
 366                                         // The toggle-link will be the first child of the element
 367                                         $toggle = $collapsible.find( '> .mw-collapsible-toggle' );
 368
 369                                         // If a direct child .content-wrapper does not exists, create it
 370                                         if ( !$collapsible.find( '> .mw-collapsible-content' ).length ) {
 371                                                 $collapsible.wrapInner( '<div class="mw-collapsible-content"></div>' );
 372                                         }
 373
 374                                         // If theres no toggle link, add it
 375                                         if ( !$toggle.length ) {
 376                                                 $toggleLink = buildDefaultToggleLink().prependTo( $collapsible );
 377                                         } else {
 378                                                 $toggleLink = $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
 379                                                         .prop( 'tabIndex', 0 );
 380                                         }
 381                                 }
 382                         }
 383
 384                         $( this ).data( 'mw-collapsible', {
 385                                 collapse: function () {
 386                                         actionHandler.call( $toggleLink.get( 0 ), null, { instantHide: true, wasCollapsed: false } );
 387                                 },
 388                                 expand: function () {
 389                                         actionHandler.call( $toggleLink.get( 0 ), null, { instantHide: true, wasCollapsed: true } );
 390                                 },
 391                                 toggle: function () {
 392                                         actionHandler.call( $toggleLink.get( 0 ), null, null );
 393                                 }
 394                         } );
 395
 396                         // Initial state
 397                         if ( options.collapsed || $collapsible.hasClass( 'mw-collapsed' ) ) {
 398                                 // One toggler can hook to multiple elements, and one element can have
 399                                 // multiple togglers. This is the sanest way to handle that.
 400                                 actionHandler.call( $toggleLink.get( 0 ), null, { instantHide: true, wasCollapsed: false } );
 401                         }
 402
 403                 } );
 404
 405                 /**
 406                  * Fired after collapsible content has been initialized
 407                  *
 408                  * This gives an option to modify the collapsible behavior.
 409                  *
 410                  * @event wikipage_collapsibleContent
 411                  * @member mw.hook
 412                  * @param {jQuery} $content All the elements that have been made collapsible
 413                  */
 414                 mw.hook( 'wikipage.collapsibleContent' ).fire( this );
 415
 416                 return this;
 417         };
 418
 419         /**
 420          * @class jQuery
 421          * @mixins jQuery.plugin.makeCollapsible
 422          */
 423
 424 }( jQuery, mediaWiki ) );