# all files / diagram-js/lib/model/ index.js

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16.67% Branches 1/6
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     import { assign } from 'min-dash';
    import inherits from 'inherits';

    import Refs from 'object-refs';

    var parentRefs = new Refs({ name: 'children', enumerable: true, collection: true }, { name: 'parent' }),
        labelRefs = new Refs({ name: 'labels', enumerable: true, collection: true }, { name: 'labelTarget' }),
        attacherRefs = new Refs({ name: 'attachers', collection: true }, { name: 'host' }),
        outgoingRefs = new Refs({ name: 'outgoing', collection: true }, { name: 'source' }),
        incomingRefs = new Refs({ name: 'incoming', collection: true }, { name: 'target' });

    /**
     * @namespace djs.model
     */

    /**
     * @memberOf djs.model
     */

    /**
     * The basic graphical representation
     *
     * @class
     *
     * @abstract
     */
    export function Base() {

      /**
       * The object that backs up the shape
       *
       * @name Base#businessObject
       * @type Object
       */
      Object.defineProperty(this, 'businessObject', {
        writable: true
      });

      /**
       * Single label support, will mapped to multi label array
       *
       * @name Base#label
       * @type Object
       */
      Object.defineProperty(this, 'label', {
        get: function() {
          return this.labels[0];
        },
        set: function(newLabel) {

          var label = this.label,
              labels = this.labels;

          if (!newLabel && label) {
            labels.remove(label);
          } else {
            labels.add(newLabel, 0);
          }
        }
      });

      /**
       * The parent shape
       *
       * @name Base#parent
       * @type Shape
       */
      parentRefs.bind(this, 'parent');

      /**
       * The list of labels
       *
       * @name Base#labels
       * @type Label
       */
      labelRefs.bind(this, 'labels');

      /**
       * The list of outgoing connections
       *
       * @name Base#outgoing
       * @type Array<Connection>
       */
      outgoingRefs.bind(this, 'outgoing');

      /**
       * The list of incoming connections
       *
       * @name Base#incoming
       * @type Array<Connection>
       */
      incomingRefs.bind(this, 'incoming');
    }

    /**
     * A graphical object
     *
     * @class
     * @constructor
     *
     * @extends Base
     */
    export function Shape() {
      Base.call(this);

      /**
       * Indicates frame shapes
       *
       * @name Shape#isFrame
       * @type Boolean
       */

      /**
       * The list of children
       *
       * @name Shape#children
       * @type Array<Base>
       */
      parentRefs.bind(this, 'children');

      /**
       * @name Shape#host
       * @type Shape
       */
      attacherRefs.bind(this, 'host');

      /**
       * @name Shape#attachers
       * @type Shape
       */
      attacherRefs.bind(this, 'attachers');
    }

    inherits(Shape, Base);

    /**
     * A root graphical object
     *
     * @class
     * @constructor
     *
     * @extends Shape
     */
    export function Root() {
      Shape.call(this);
    }

    inherits(Root, Shape);

    /**
     * A label for an element
     *
     * @class
     * @constructor
     *
     * @extends Shape
     */
    export function Label() {
      Shape.call(this);

      /**
       * The labeled element
       *
       * @name Label#labelTarget
       * @type Base
       */
      labelRefs.bind(this, 'labelTarget');
    }

    inherits(Label, Shape);

    /**
     * A connection between two elements
     *
     * @class
     * @constructor
     *
     * @extends Base
     */
    export function Connection() {
      Base.call(this);

      /**
       * The element this connection originates from
       *
       * @name Connection#source
       * @type Base
       */
      outgoingRefs.bind(this, 'source');

      /**
       * The element this connection points to
       *
       * @name Connection#target
       * @type Base
       */
      incomingRefs.bind(this, 'target');
    }

    inherits(Connection, Base);

    var types = {
      connection: Connection,
      shape: Shape,
      label: Label,
      root: Root
    };

    /**
     * Creates a new model element of the specified type
     *
     * @method create
     *
     * @example
     *
     * var shape1 = Model.create('shape', { x: 10, y: 10, width: 100, height: 100 });
     * var shape2 = Model.create('shape', { x: 210, y: 210, width: 100, height: 100 });
     *
     * var connection = Model.create('connection', { waypoints: [ { x: 110, y: 55 }, {x: 210, y: 55 } ] });
     *
     * @param  {String} type lower-cased model name
     * @param  {Object} attrs attributes to initialize the new model instance with
     *
     * @return {Base} the new model instance
     */
    export function create(type, attrs) {
      var Type = types[type];
      Iif (!Type) {
        throw new Error('unknown type: <' + type + '>');
      }
      return assign(new Type(), attrs);
    }