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import { assign } from 'min-dash';
import inherits from 'inherits';
import BpmnElementFactory from 'bpmn-js/lib/features/modeling/ElementFactory';
import { DEFAULT_LABEL_SIZE } from 'bpmn-js/lib/util/LabelUtil';
/**
* A custom factory that knows how to create BPMN _and_ custom elements.
*/
export default function CustomElementFactory(bpmnFactory, moddle) {
BpmnElementFactory.call(this, bpmnFactory, moddle);
var self = this;
/**
* Create a diagram-js element with the given type (any of shape, connection, label).
*
* @param {String} elementType
* @param {Object} attrs
*
* @return {djs.model.Base}
*/
this.create = function(elementType, attrs) {
var type = attrs.type;
if (elementType === 'label') {
return self.baseCreate(
elementType,
assign({ type: 'label' }, DEFAULT_LABEL_SIZE, attrs)
);
}
// add type to businessObject if custom
if (/^custom:/.test(type)) {
if (!attrs.businessObject) {
attrs.businessObject = {
type: type
};
if (attrs.id) {
assign(attrs.businessObject, {
id: attrs.id
});
}
}
// add width and height if shape
if (!/:connection$/.test(type)) {
assign(attrs, self._getCustomElementSize(type));
}
if (!('$instanceOf' in attrs.businessObject)) {
// ensure we can use ModelUtil#is for type checks
Object.defineProperty(attrs.businessObject, '$instanceOf', {
value: function(type) {
return this.type === type;
}
});
}
return self.baseCreate(elementType, attrs);
}
return self.createBpmnElement(elementType, attrs);
};
}
inherits(CustomElementFactory, BpmnElementFactory);
CustomElementFactory.$inject = ['bpmnFactory', 'moddle'];
/**
* Returns the default size of custom shapes.
*
* The following example shows an interface on how
* to setup the custom shapes's dimensions.
*
* @example
*
* var shapes = {
* triangle: { width: 40, height: 40 },
* rectangle: { width: 100, height: 20 }
* };
*
* return shapes[type];
*
*
* @param {String} type
*
* @return {Dimensions} a {width, height} object representing the size of the element
*/
CustomElementFactory.prototype._getCustomElementSize = function(type) {
var shapes = {
__default: { width: 100, height: 80 },
'custom:triangle': { width: 40, height: 40 },
'custom:circle': { width: 140, height: 140 }
};
return shapes[type] || shapes.__default;
};
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