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                 if ( $defaultToggle !== null && !$defaultToggle.jquery ) {
  39                         // is optional (may be undefined), but if defined it must be an instance of jQuery.
  40                         // If it's not, abort right away.
  41                         // After this $defaultToggle is either null or a valid jQuery instance.
  42                         return;
  43                 }
  44
  45                 // Trigger a custom event to allow callers to hook to the collapsing/expanding,
  46                 // allowing the module to be testable, and making it possible to
  47                 // e.g. implement persistence via cookies
  48                 $collapsible.trigger( action === 'expand' ? 'beforeExpand.mw-collapsible' : 'beforeCollapse.mw-collapsible' );
  49                 hookCallback = function () {
  50                         $collapsible.trigger( action === 'expand' ? 'afterExpand.mw-collapsible' : 'afterCollapse.mw-collapsible' );
  51                 };
  52
  53                 // Handle different kinds of elements
  54
  55                 if ( !options.plainMode && $collapsible.is( 'table' ) ) {
  56                         // Tables
  57                         // If there is a caption, hide all rows; otherwise, only hide body rows
  58                         if ( $collapsible.find( '> caption' ).length ) {
  59                                 $containers = $collapsible.find( '> * > tr' );
  60                         } else {
  61                                 $containers = $collapsible.find( '> tbody > tr' );
  62                         }
  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().promise().done( hookCallback );
  77                                 }
  78                         } else {
  79                                 $containers.stop( true, true ).fadeIn().promise().done( 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().promise().done( hookCallback );
  96                                 }
  97                         } else {
  98                                 $containers.stop( true, true ).slideDown().promise().done( 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().promise().done( hookCallback );
 113                                         }
 114                                 } else {
 115                                         $collapsibleContent.slideDown().promise().done( 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().promise().done( hookCallback );
 128                                                 } else {
 129                                                         $collapsible.slideUp().promise().done( hookCallback );
 130                                                 }
 131                                         }
 132                                 } else {
 133                                         if ( $collapsible.is( 'tr' ) || $collapsible.is( 'td' ) || $collapsible.is( 'th' ) ) {
 134                                                 $collapsible.fadeIn().promise().done( hookCallback );
 135                                         } else {
 136                                                 $collapsible.slideDown().promise().done( hookCallback );
 137                                         }
 138                                 }
 139                         }
 140                 }
 141         }
 142
 143         /**
 144          * Handle clicking/keypressing 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          * @private
 149          * @param {jQuery} $toggle the clickable toggle itself
 150          * @param {jQuery} $collapsible the collapsible element
 151          * @param {jQuery.Event|null} e either the event or null if unavailable
 152          * @param {Object|undefined} options
 153          */
 154         function togglingHandler( $toggle, $collapsible, e, options ) {
 155                 var wasCollapsed, $textContainer, collapseText, expandText;
 156
 157                 if ( options === undefined ) {
 158                         options = {};
 159                 }
 160
 161                 if ( e ) {
 162                         if ( e.type === 'click' && options.linksPassthru && $.nodeName( e.target, 'a' ) ) {
 163                                 // Don't fire if a link was clicked, if requested  (for premade togglers by default)
 164                                 return;
 165                         } else if ( e.type === 'keypress' && e.which !== 13 && e.which !== 32 ) {
 166                                 // Only handle keypresses on the "Enter" or "Space" keys
 167                                 return;
 168                         } else {
 169                                 e.preventDefault();
 170                                 e.stopPropagation();
 171                         }
 172                 }
 173
 174                 // This allows the element to be hidden on initial toggle without fiddling with the class
 175                 if ( options.wasCollapsed !== undefined ) {
 176                         wasCollapsed = options.wasCollapsed;
 177                 } else {
 178                         wasCollapsed = $collapsible.hasClass( 'mw-collapsed' );
 179                 }
 180
 181                 // Toggle the state of the collapsible element (that is, expand or collapse)
 182                 $collapsible.toggleClass( 'mw-collapsed', !wasCollapsed );
 183
 184                 // Toggle the mw-collapsible-toggle classes, if requested (for default and premade togglers by default)
 185                 if ( options.toggleClasses ) {
 186                         $toggle
 187                                 .toggleClass( 'mw-collapsible-toggle-collapsed', !wasCollapsed )
 188                                 .toggleClass( 'mw-collapsible-toggle-expanded', wasCollapsed );
 189                 }
 190
 191                 // Toggle the text ("Show"/"Hide"), if requested (for default togglers by default)
 192                 if ( options.toggleText ) {
 193                         collapseText = options.toggleText.collapseText;
 194                         expandText = options.toggleText.expandText;
 195
 196                         $textContainer = $toggle.find( '> a' );
 197                         if ( !$textContainer.length ) {
 198                                 $textContainer = $toggle;
 199                         }
 200                         $textContainer.text( wasCollapsed ? collapseText : expandText );
 201                 }
 202
 203                 // And finally toggle the element state itself
 204                 toggleElement( $collapsible, wasCollapsed ? 'expand' : 'collapse', $toggle, options );
 205         }
 206
 207         /**
 208          * Enable collapsible-functionality on all elements in the collection.
 209          *
 210          * - Will prevent binding twice to the same element.
 211          * - Initial state is expanded by default, this can be overriden by adding class
 212          *   "mw-collapsed" to the "mw-collapsible" element.
 213          * - Elements made collapsible have jQuery data "mw-made-collapsible" set to true.
 214          * - The inner content is wrapped in a "div.mw-collapsible-content" (except for tables and lists).
 215          *
 216          * @param {Object} [options]
 217          * @param {string} [options.collapseText] Text used for the toggler, when clicking it would
 218          *   collapse the element. Default: the 'data-collapsetext' attribute of the
 219          *   collapsible element or the content of 'collapsible-collapse' message.
 220          * @param {string} [options.expandText] Text used for the toggler, when clicking it would
 221          *   expand the element. Default: the 'data-expandtext' attribute of the
 222          *   collapsible element or the content of 'collapsible-expand' message.
 223          * @param {boolean} [options.collapsed] Whether to collapse immediately. By default
 224          *   collapse only if the elements has the 'mw-collapsible' class.
 225          * @param {jQuery} [options.$customTogglers] Elements to be used as togglers
 226          *   for this collapsible element. By default, if the collapsible element
 227          *   has an id attribute like 'mw-customcollapsible-XXX', elements with a
 228          *   *class* of 'mw-customtoggle-XXX' are made togglers for it.
 229          * @param {boolean} [options.plainMode=false] Whether to use a "plain mode" when making the
 230          *   element collapsible - that is, hide entire tables and lists (instead
 231          *   of hiding only all rows but first of tables, and hiding each list
 232          *   item separately for lists) and don't wrap other elements in
 233          *   div.mw-collapsible-content. May only be used with custom togglers.
 234          * @return {jQuery}
 235          * @chainable
 236          */
 237         $.fn.makeCollapsible = function ( options ) {
 238                 if ( options === undefined ) {
 239                         options = {};
 240                 }
 241
 242                 return this.each( function () {
 243                         var $collapsible, collapseText, expandText, $caption, $toggle, actionHandler, buildDefaultToggleLink,
 244                                 premadeToggleHandler, $toggleLink, $firstItem, collapsibleId, $customTogglers, firstval;
 245
 246                         // Ensure class "mw-collapsible" is present in case .makeCollapsible()
 247                         // is called on element(s) that don't have it yet.
 248                         $collapsible = $( this ).addClass( 'mw-collapsible' );
 249
 250                         // Return if it has been enabled already.
 251                         if ( $collapsible.data( 'mw-made-collapsible' ) ) {
 252                                 return;
 253                         } else {
 254                                 $collapsible.data( 'mw-made-collapsible', true );
 255                         }
 256
 257                         // Use custom text or default?
 258                         collapseText = options.collapseText || $collapsible.attr( 'data-collapsetext' ) || mw.msg( 'collapsible-collapse' );
 259                         expandText = options.expandText || $collapsible.attr( 'data-expandtext' ) || mw.msg( 'collapsible-expand' );
 260
 261                         // Default click/keypress handler and toggle link to use when none is present
 262                         actionHandler = function ( e, opts ) {
 263                                 var defaultOpts = {
 264                                         toggleClasses: true,
 265                                         toggleText: { collapseText: collapseText, expandText: expandText }
 266                                 };
 267                                 opts = $.extend( defaultOpts, options, opts );
 268                                 togglingHandler( $( this ), $collapsible, e, opts );
 269                         };
 270                         // Default toggle link. Only build it when needed to avoid jQuery memory leaks (event data).
 271                         buildDefaultToggleLink = function () {
 272                                 return $( '<a href="#"></a>' )
 273                                         .text( collapseText )
 274                                         .wrap( '<span class="mw-collapsible-toggle"></span>' )
 275                                                 .parent()
 276                                                 .prepend( '<span class="mw-collapsible-bracket">[</span>' )
 277                                                 .append( '<span class="mw-collapsible-bracket">]</span>' )
 278                                                 .on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler );
 279                         };
 280
 281                         // Default handler for clicking on premade toggles
 282                         premadeToggleHandler = function ( e, opts ) {
 283                                 var defaultOpts = { toggleClasses: true, linksPassthru: true };
 284                                 opts = $.extend( defaultOpts, options, opts );
 285                                 togglingHandler( $( this ), $collapsible, e, opts );
 286                         };
 287
 288                         // Check if this element has a custom position for the toggle link
 289                         // (ie. outside the container or deeper inside the tree)
 290                         if ( options.$customTogglers ) {
 291                                 $customTogglers = $( options.$customTogglers );
 292                         } else {
 293                                 collapsibleId = $collapsible.attr( 'id' ) || '';
 294                                 if ( collapsibleId.indexOf( 'mw-customcollapsible-' ) === 0 ) {
 295                                         $customTogglers = $( '.' + collapsibleId.replace( 'mw-customcollapsible', 'mw-customtoggle' ) )
 296                                                 .addClass( 'mw-customtoggle' );
 297                                 }
 298                         }
 299
 300                         // Add event handlers to custom togglers or create our own ones
 301                         if ( $customTogglers && $customTogglers.length ) {
 302                                 actionHandler = function ( e, opts ) {
 303                                         var defaultOpts = {};
 304                                         opts = $.extend( defaultOpts, options, opts );
 305                                         togglingHandler( $( this ), $collapsible, e, opts );
 306                                 };
 307
 308                                 $toggleLink = $customTogglers
 309                                         .on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
 310                                         .prop( 'tabIndex', 0 );
 311
 312                         } else {
 313                                 // If this is not a custom case, do the default: wrap the
 314                                 // contents and add the toggle link. Different elements are
 315                                 // treated differently.
 316                                 if ( $collapsible.is( 'table' ) ) {
 317
 318                                         // If the table has a caption, collapse to the caption
 319                                         // as opposed to the first row
 320                                         $caption = $collapsible.find( '> caption' );
 321                                         if ( $caption.length ) {
 322                                                 $toggle = $caption.find( '> .mw-collapsible-toggle' );
 323
 324                                                 // If there is no toggle link, add it to the end of the caption
 325                                                 if ( !$toggle.length ) {
 326                                                         $toggleLink = buildDefaultToggleLink().appendTo( $caption );
 327                                                 } else {
 328                                                         actionHandler = premadeToggleHandler;
 329                                                         $toggleLink = $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
 330                                                                 .prop( 'tabIndex', 0 );
 331                                                 }
 332                                         } else {
 333                                                 // The toggle-link will be in one the the cells (td or th) of the first row
 334                                                 $firstItem = $collapsible.find( 'tr:first th, tr:first td' );
 335                                                 $toggle = $firstItem.find( '> .mw-collapsible-toggle' );
 336
 337                                                 // If theres no toggle link, add it to the last cell
 338                                                 if ( !$toggle.length ) {
 339                                                         $toggleLink = buildDefaultToggleLink().prependTo( $firstItem.eq( -1 ) );
 340                                                 } else {
 341                                                         actionHandler = premadeToggleHandler;
 342                                                         $toggleLink = $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
 343                                                                 .prop( 'tabIndex', 0 );
 344                                                 }
 345                                         }
 346
 347                                 } else if ( $collapsible.is( 'ul' ) || $collapsible.is( 'ol' ) ) {
 348                                         // The toggle-link will be in the first list-item
 349                                         $firstItem = $collapsible.find( 'li:first' );
 350                                         $toggle = $firstItem.find( '> .mw-collapsible-toggle' );
 351
 352                                         // If theres no toggle link, add it
 353                                         if ( !$toggle.length ) {
 354                                                 // Make sure the numeral order doesn't get messed up, force the first (soon to be second) item
 355                                                 // to be "1". Except if the value-attribute is already used.
 356                                                 // If no value was set WebKit returns "", Mozilla returns '-1', others return 0, null or undefined.
 357                                                 firstval = $firstItem.prop( 'value' );
 358                                                 if ( firstval === undefined || !firstval || firstval === '-1' || firstval === -1 ) {
 359                                                         $firstItem.prop( 'value', '1' );
 360                                                 }
 361                                                 $toggleLink = buildDefaultToggleLink();
 362                                                 $toggleLink.wrap( '<li class="mw-collapsible-toggle-li"></li>' ).parent().prependTo( $collapsible );
 363                                         } else {
 364                                                 actionHandler = premadeToggleHandler;
 365                                                 $toggleLink = $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
 366                                                         .prop( 'tabIndex', 0 );
 367                                         }
 368
 369                                 } else { // <div>, <p> etc.
 370
 371                                         // The toggle-link will be the first child of the element
 372                                         $toggle = $collapsible.find( '> .mw-collapsible-toggle' );
 373
 374                                         // If a direct child .content-wrapper does not exists, create it
 375                                         if ( !$collapsible.find( '> .mw-collapsible-content' ).length ) {
 376                                                 $collapsible.wrapInner( '<div class="mw-collapsible-content"></div>' );
 377                                         }
 378
 379                                         // If theres no toggle link, add it
 380                                         if ( !$toggle.length ) {
 381                                                 $toggleLink = buildDefaultToggleLink().prependTo( $collapsible );
 382                                         } else {
 383                                                 actionHandler = premadeToggleHandler;
 384                                                 $toggleLink = $toggle.on( 'click.mw-collapsible keypress.mw-collapsible', actionHandler )
 385                                                         .prop( 'tabIndex', 0 );
 386                                         }
 387                                 }
 388                         }
 389
 390                         // Initial state
 391                         if ( options.collapsed || $collapsible.hasClass( 'mw-collapsed' ) ) {
 392                                 // One toggler can hook to multiple elements, and one element can have
 393                                 // multiple togglers. This is the sanest way to handle that.
 394                                 actionHandler.call( $toggleLink.get( 0 ), null, { instantHide: true, wasCollapsed: false } );
 395                         }
 396                 } );
 397         };
 398
 399         /**
 400          * @class jQuery
 401          * @mixins jQuery.plugin.makeCollapsible
 402          */
 403
 404 }( jQuery, mediaWiki ) );