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