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Viewing file:     layout-mode.js (3.93 KB)      -rwxrwxr-x

/**
 * Isotope LayoutMode
 */

( function( window, factory ) {
  // universal module definition
  /* jshint strict: false */ /*globals define, module, require */
  if ( typeof define == 'function' && define.amd ) {
    // AMD
    define( [
        'get-size/get-size',
        'outlayer/outlayer'
      ],
      factory );
  } else if ( typeof module == 'object' && module.exports ) {
    // CommonJS
    module.exports = factory(
      require('get-size'),
      require('outlayer')
    );
  } else {
    // browser global
    window.Isotope = window.Isotope || {};
    window.Isotope.LayoutMode = factory(
      window.getSize,
      window.Outlayer
    );
  }

}( window, function factory( getSize, Outlayer ) {
  'use strict';

  // layout mode class
  function LayoutMode( isotope ) {
    this.isotope = isotope;
    // link properties
    if ( isotope ) {
      this.options = isotope.options[ this.namespace ];
      this.element = isotope.element;
      this.items = isotope.filteredItems;
      this.size = isotope.size;
    }
  }

  var proto = LayoutMode.prototype;

  /**
   * some methods should just defer to default Outlayer method
   * and reference the Isotope instance as `this`
  **/
  var facadeMethods = [
    '_resetLayout',
    '_getItemLayoutPosition',
    '_manageStamp',
    '_getContainerSize',
    '_getElementOffset',
    'needsResizeLayout',
    '_getOption'
  ];

  facadeMethods.forEach( function( methodName ) {
    proto[ methodName ] = function() {
      return Outlayer.prototype[ methodName ].apply( this.isotope, arguments );
    };
  });

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

  // for horizontal layout modes, check vertical size
  proto.needsVerticalResizeLayout = function() {
    // don't trigger if size did not change
    var size = getSize( this.isotope.element );
    // check that this.size and size are there
    // IE8 triggers resize on body size change, so they might not be
    var hasSizes = this.isotope.size && size;
    return hasSizes && size.innerHeight != this.isotope.size.innerHeight;
  };

  // ----- measurements ----- //

  proto._getMeasurement = function() {
    this.isotope._getMeasurement.apply( this, arguments );
  };

  proto.getColumnWidth = function() {
    this.getSegmentSize( 'column', 'Width' );
  };

  proto.getRowHeight = function() {
    this.getSegmentSize( 'row', 'Height' );
  };

  /**
   * get columnWidth or rowHeight
   * segment: 'column' or 'row'
   * size 'Width' or 'Height'
  **/
  proto.getSegmentSize = function( segment, size ) {
    var segmentName = segment + size;
    var outerSize = 'outer' + size;
    // columnWidth / outerWidth // rowHeight / outerHeight
    this._getMeasurement( segmentName, outerSize );
    // got rowHeight or columnWidth, we can chill
    if ( this[ segmentName ] ) {
      return;
    }
    // fall back to item of first element
    var firstItemSize = this.getFirstItemSize();
    this[ segmentName ] = firstItemSize && firstItemSize[ outerSize ] ||
      // or size of container
      this.isotope.size[ 'inner' + size ];
  };

  proto.getFirstItemSize = function() {
    var firstItem = this.isotope.filteredItems[0];
    return firstItem && firstItem.element && getSize( firstItem.element );
  };

  // ----- methods that should reference isotope ----- //

  proto.layout = function() {
    this.isotope.layout.apply( this.isotope, arguments );
  };

  proto.getSize = function() {
    this.isotope.getSize();
    this.size = this.isotope.size;
  };

  // -------------------------- create -------------------------- //

  LayoutMode.modes = {};

  LayoutMode.create = function( namespace, options ) {

    function Mode() {
      LayoutMode.apply( this, arguments );
    }

    Mode.prototype = Object.create( proto );
    Mode.prototype.constructor = Mode;

    // default options
    if ( options ) {
      Mode.options = options;
    }

    Mode.prototype.namespace = namespace;
    // register in Isotope
    LayoutMode.modes[ namespace ] = Mode;

    return Mode;
  };

  return LayoutMode;

}));