isotope/js/isotope.js

/*!
 * Isotope v3.0.2
 *
 * Licensed GPLv3 for open source use
 * or Isotope Commercial License for commercial use
 *
 * http://isotope.metafizzy.co
 * Copyright 2016 Metafizzy
 */

( function( window, factory ) {
  // universal module definition
  /* jshint strict: false */ /*globals define, module, require */
  if ( typeof define == 'function' && define.amd ) {
    // AMD
    define( [
        'outlayer/outlayer',
        'get-size/get-size',
        'desandro-matches-selector/matches-selector',
        'fizzy-ui-utils/utils',
        './item',
        './layout-mode',
        // include default layout modes
        './layout-modes/masonry',
        './layout-modes/fit-rows',
        './layout-modes/vertical'
      ],
      function( Outlayer, getSize, matchesSelector, utils, Item, LayoutMode ) {
        return factory( window, Outlayer, getSize, matchesSelector, utils, Item, LayoutMode );
      });
  } else if ( typeof module == 'object' && module.exports ) {
    // CommonJS
    module.exports = factory(
      window,
      require('outlayer'),
      require('get-size'),
      require('desandro-matches-selector'),
      require('fizzy-ui-utils'),
      require('./item'),
      require('./layout-mode'),
      // include default layout modes
      require('./layout-modes/masonry'),
      require('./layout-modes/fit-rows'),
      require('./layout-modes/vertical')
    );
  } else {
    // browser global
    window.Isotope = factory(
      window,
      window.Outlayer,
      window.getSize,
      window.matchesSelector,
      window.fizzyUIUtils,
      window.Isotope.Item,
      window.Isotope.LayoutMode
    );
  }

}( window, function factory( window, Outlayer, getSize, matchesSelector, utils,
  Item, LayoutMode ) {

'use strict';

// -------------------------- vars -------------------------- //

var jQuery = window.jQuery;

// -------------------------- helpers -------------------------- //

var trim = String.prototype.trim ?
  function( str ) {
    return str.trim();
  } :
  function( str ) {
    return str.replace( /^\s+|\s+$/g, '' );
  };

// -------------------------- isotopeDefinition -------------------------- //

  // create an Outlayer layout class
  var Isotope = Outlayer.create( 'isotope', {
    layoutMode: 'masonry',
    isJQueryFiltering: true,
    sortAscending: true
  });

  Isotope.Item = Item;
  Isotope.LayoutMode = LayoutMode;

  var proto = Isotope.prototype;

  proto._create = function() {
    this.itemGUID = 0;
    // functions that sort items
    this._sorters = {};
    this._getSorters();
    // call super
    Outlayer.prototype._create.call( this );

    // create layout modes
    this.modes = {};
    // start filteredItems with all items
    this.filteredItems = this.items;
    // keep of track of sortBys
    this.sortHistory = [ 'original-order' ];
    // create from registered layout modes
    for ( var name in LayoutMode.modes ) {
      this._initLayoutMode( name );
    }
  };

  proto.reloadItems = function() {
    // reset item ID counter
    this.itemGUID = 0;
    // call super
    Outlayer.prototype.reloadItems.call( this );
  };

  proto._itemize = function() {
    var items = Outlayer.prototype._itemize.apply( this, arguments );
    // assign ID for original-order
    for ( var i=0; i < items.length; i++ ) {
      var item = items[i];
      item.id = this.itemGUID++;
    }
    this._updateItemsSortData( items );
    return items;
  };


  // -------------------------- layout -------------------------- //

  proto._initLayoutMode = function( name ) {
    var Mode = LayoutMode.modes[ name ];
    // set mode options
    // HACK extend initial options, back-fill in default options
    var initialOpts = this.options[ name ] || {};
    this.options[ name ] = Mode.options ?
      utils.extend( Mode.options, initialOpts ) : initialOpts;
    // init layout mode instance
    this.modes[ name ] = new Mode( this );
  };


  proto.layout = function() {
    // if first time doing layout, do all magic
    if ( !this._isLayoutInited && this._getOption('initLayout') ) {
      this.arrange();
      return;
    }
    this._layout();
  };

  // private method to be used in layout() & magic()
  proto._layout = function() {
    // don't animate first layout
    var isInstant = this._getIsInstant();
    // layout flow
    this._resetLayout();
    this._manageStamps();
    this.layoutItems( this.filteredItems, isInstant );

    // flag for initalized
    this._isLayoutInited = true;
  };

  // filter + sort + layout
  proto.arrange = function( opts ) {
    // set any options pass
    this.option( opts );
    this._getIsInstant();
    // filter, sort, and layout

    // filter
    var filtered = this._filter( this.items );
    this.filteredItems = filtered.matches;

    this._bindArrangeComplete();

    if ( this._isInstant ) {
      this._noTransition( this._hideReveal, [ filtered ] );
    } else {
      this._hideReveal( filtered );
    }

    this._sort();
    this._layout();
  };
  // alias to _init for main plugin method
  proto._init = proto.arrange;

  proto._hideReveal = function( filtered ) {
    this.reveal( filtered.needReveal );
    this.hide( filtered.needHide );
  };

  // HACK
  // Don't animate/transition first layout
  // Or don't animate/transition other layouts
  proto._getIsInstant = function() {
    var isLayoutInstant = this._getOption('layoutInstant');
    var isInstant = isLayoutInstant !== undefined ? isLayoutInstant :
      !this._isLayoutInited;
    this._isInstant = isInstant;
    return isInstant;
  };

  // listen for layoutComplete, hideComplete and revealComplete
  // to trigger arrangeComplete
  proto._bindArrangeComplete = function() {
    // listen for 3 events to trigger arrangeComplete
    var isLayoutComplete, isHideComplete, isRevealComplete;
    var _this = this;
    function arrangeParallelCallback() {
      if ( isLayoutComplete && isHideComplete && isRevealComplete ) {
        _this.dispatchEvent( 'arrangeComplete', null, [ _this.filteredItems ] );
      }
    }
    this.once( 'layoutComplete', function() {
      isLayoutComplete = true;
      arrangeParallelCallback();
    });
    this.once( 'hideComplete', function() {
      isHideComplete = true;
      arrangeParallelCallback();
    });
    this.once( 'revealComplete', function() {
      isRevealComplete = true;
      arrangeParallelCallback();
    });
  };

  // -------------------------- filter -------------------------- //

  proto._filter = function( items ) {
    var filter = this.options.filter;
    filter = filter || '*';
    var matches = [];
    var hiddenMatched = [];
    var visibleUnmatched = [];

    var test = this._getFilterTest( filter );

    // test each item
    for ( var i=0; i < items.length; i++ ) {
      var item = items[i];
      if ( item.isIgnored ) {
        continue;
      }
      // add item to either matched or unmatched group
      var isMatched = test( item );
      // item.isFilterMatched = isMatched;
      // add to matches if its a match
      if ( isMatched ) {
        matches.push( item );
      }
      // add to additional group if item needs to be hidden or revealed
      if ( isMatched && item.isHidden ) {
        hiddenMatched.push( item );
      } else if ( !isMatched && !item.isHidden ) {
        visibleUnmatched.push( item );
      }
    }

    // return collections of items to be manipulated
    return {
      matches: matches,
      needReveal: hiddenMatched,
      needHide: visibleUnmatched
    };
  };

  // get a jQuery, function, or a matchesSelector test given the filter
  proto._getFilterTest = function( filter ) {
    if ( jQuery && this.options.isJQueryFiltering ) {
      // use jQuery
      return function( item ) {
        return jQuery( item.element ).is( filter );
      };
    }
    if ( typeof filter == 'function' ) {
      // use filter as function
      return function( item ) {
        return filter( item.element );
      };
    }
    // default, use filter as selector string
    return function( item ) {
      return matchesSelector( item.element, filter );
    };
  };

  // -------------------------- sorting -------------------------- //

  /**
   * @params {Array} elems
   * @public
   */
  proto.updateSortData = function( elems ) {
    // get items
    var items;
    if ( elems ) {
      elems = utils.makeArray( elems );
      items = this.getItems( elems );
    } else {
      // update all items if no elems provided
      items = this.items;
    }

    this._getSorters();
    this._updateItemsSortData( items );
  };

  proto._getSorters = function() {
    var getSortData = this.options.getSortData;
    for ( var key in getSortData ) {
      var sorter = getSortData[ key ];
      this._sorters[ key ] = mungeSorter( sorter );
    }
  };

  /**
   * @params {Array} items - of Isotope.Items
   * @private
   */
  proto._updateItemsSortData = function( items ) {
    // do not update if no items
    var len = items && items.length;

    for ( var i=0; len && i < len; i++ ) {
      var item = items[i];
      item.updateSortData();
    }
  };

  // ----- munge sorter ----- //

  // encapsulate this, as we just need mungeSorter
  // other functions in here are just for munging
  var mungeSorter = ( function() {
    // add a magic layer to sorters for convienent shorthands
    // `.foo-bar` will use the text of .foo-bar querySelector
    // `[foo-bar]` will use attribute
    // you can also add parser
    // `.foo-bar parseInt` will parse that as a number
    function mungeSorter( sorter ) {
      // if not a string, return function or whatever it is
      if ( typeof sorter != 'string' ) {
        return sorter;
      }
      // parse the sorter string
      var args = trim( sorter ).split(' ');
      var query = args[0];
      // check if query looks like [an-attribute]
      var attrMatch = query.match( /^\[(.+)\]$/ );
      var attr = attrMatch && attrMatch[1];
      var getValue = getValueGetter( attr, query );
      // use second argument as a parser
      var parser = Isotope.sortDataParsers[ args[1] ];
      // parse the value, if there was a parser
      sorter = parser ? function( elem ) {
        return elem && parser( getValue( elem ) );
      } :
      // otherwise just return value
      function( elem ) {
        return elem && getValue( elem );
      };

      return sorter;
    }

    // get an attribute getter, or get text of the querySelector
    function getValueGetter( attr, query ) {
      // if query looks like [foo-bar], get attribute
      if ( attr ) {
        return function getAttribute( elem ) {
          return elem.getAttribute( attr );
        };
      }

      // otherwise, assume its a querySelector, and get its text
      return function getChildText( elem ) {
        var child = elem.querySelector( query );
        return child && child.textContent;
      };
    }

    return mungeSorter;
  })();

  // parsers used in getSortData shortcut strings
  Isotope.sortDataParsers = {
    'parseInt': function( val ) {
      return parseInt( val, 10 );
    },
    'parseFloat': function( val ) {
      return parseFloat( val );
    }
  };

  // ----- sort method ----- //

  // sort filteredItem order
  proto._sort = function() {
    var sortByOpt = this.options.sortBy;
    if ( !sortByOpt ) {
      return;
    }
    // concat all sortBy and sortHistory
    var sortBys = [].concat.apply( sortByOpt, this.sortHistory );
    // sort magic
    var itemSorter = getItemSorter( sortBys, this.options.sortAscending );
    this.filteredItems.sort( itemSorter );
    // keep track of sortBy History
    if ( sortByOpt != this.sortHistory[0] ) {
      // add to front, oldest goes in last
      this.sortHistory.unshift( sortByOpt );
    }
  };

  // returns a function used for sorting
  function getItemSorter( sortBys, sortAsc ) {
    return function sorter( itemA, itemB ) {
      // cycle through all sortKeys
      for ( var i = 0; i < sortBys.length; i++ ) {
        var sortBy = sortBys[i];
        var a = itemA.sortData[ sortBy ];
        var b = itemB.sortData[ sortBy ];
        if ( a > b || a < b ) {
          // if sortAsc is an object, use the value given the sortBy key
          var isAscending = sortAsc[ sortBy ] !== undefined ? sortAsc[ sortBy ] : sortAsc;
          var direction = isAscending ? 1 : -1;
          return ( a > b ? 1 : -1 ) * direction;
        }
      }
      return 0;
    };
  }

  // -------------------------- methods -------------------------- //

  // get layout mode
  proto._mode = function() {
    var layoutMode = this.options.layoutMode;
    var mode = this.modes[ layoutMode ];
    if ( !mode ) {
      // TODO console.error
      throw new Error( 'No layout mode: ' + layoutMode );
    }
    // HACK sync mode's options
    // any options set after init for layout mode need to be synced
    mode.options = this.options[ layoutMode ];
    return mode;
  };

  proto._resetLayout = function() {
    // trigger original reset layout
    Outlayer.prototype._resetLayout.call( this );
    this._mode()._resetLayout();
  };

  proto._getItemLayoutPosition = function( item  ) {
    return this._mode()._getItemLayoutPosition( item );
  };

  proto._manageStamp = function( stamp ) {
    this._mode()._manageStamp( stamp );
  };

  proto._getContainerSize = function() {
    return this._mode()._getContainerSize();
  };

  proto.needsResizeLayout = function() {
    return this._mode().needsResizeLayout();
  };

  // -------------------------- adding & removing -------------------------- //

  // HEADS UP overwrites default Outlayer appended
  proto.appended = function( elems ) {
    var items = this.addItems( elems );
    if ( !items.length ) {
      return;
    }
    // filter, layout, reveal new items
    var filteredItems = this._filterRevealAdded( items );
    // add to filteredItems
    this.filteredItems = this.filteredItems.concat( filteredItems );
  };

  // HEADS UP overwrites default Outlayer prepended
  proto.prepended = function( elems ) {
    var items = this._itemize( elems );
    if ( !items.length ) {
      return;
    }
    // start new layout
    this._resetLayout();
    this._manageStamps();
    // filter, layout, reveal new items
    var filteredItems = this._filterRevealAdded( items );
    // layout previous items
    this.layoutItems( this.filteredItems );
    // add to items and filteredItems
    this.filteredItems = filteredItems.concat( this.filteredItems );
    this.items = items.concat( this.items );
  };

  proto._filterRevealAdded = function( items ) {
    var filtered = this._filter( items );
    this.hide( filtered.needHide );
    // reveal all new items
    this.reveal( filtered.matches );
    // layout new items, no transition
    this.layoutItems( filtered.matches, true );
    return filtered.matches;
  };

  /**
   * Filter, sort, and layout newly-appended item elements
   * @param {Array or NodeList or Element} elems
   */
  proto.insert = function( elems ) {
    var items = this.addItems( elems );
    if ( !items.length ) {
      return;
    }
    // append item elements
    var i, item;
    var len = items.length;
    for ( i=0; i < len; i++ ) {
      item = items[i];
      this.element.appendChild( item.element );
    }
    // filter new stuff
    var filteredInsertItems = this._filter( items ).matches;
    // set flag
    for ( i=0; i < len; i++ ) {
      items[i].isLayoutInstant = true;
    }
    this.arrange();
    // reset flag
    for ( i=0; i < len; i++ ) {
      delete items[i].isLayoutInstant;
    }
    this.reveal( filteredInsertItems );
  };

  var _remove = proto.remove;
  proto.remove = function( elems ) {
    elems = utils.makeArray( elems );
    var removeItems = this.getItems( elems );
    // do regular thing
    _remove.call( this, elems );
    // bail if no items to remove
    var len = removeItems && removeItems.length;
    // remove elems from filteredItems
    for ( var i=0; len && i < len; i++ ) {
      var item = removeItems[i];
      // remove item from collection
      utils.removeFrom( this.filteredItems, item );
    }
  };

  proto.shuffle = function() {
    // update random sortData
    for ( var i=0; i < this.items.length; i++ ) {
      var item = this.items[i];
      item.sortData.random = Math.random();
    }
    this.options.sortBy = 'random';
    this._sort();
    this._layout();
  };

  /**
   * trigger fn without transition
   * kind of hacky to have this in the first place
   * @param {Function} fn
   * @param {Array} args
   * @returns ret
   * @private
   */
  proto._noTransition = function( fn, args ) {
    // save transitionDuration before disabling
    var transitionDuration = this.options.transitionDuration;
    // disable transition
    this.options.transitionDuration = 0;
    // do it
    var returnValue = fn.apply( this, args );
    // re-enable transition for reveal
    this.options.transitionDuration = transitionDuration;
    return returnValue;
  };

  // ----- helper methods ----- //

  /**
   * getter method for getting filtered item elements
   * @returns {Array} elems - collection of item elements
   */
  proto.getFilteredItemElements = function() {
    return this.filteredItems.map( function( item ) {
      return item.element;
    });
  };

  // -----  ----- //

  return Isotope;

}));