bpmn-js/lib/features/modeling/behavior/DetachEventBehavior.js

76 lines
1.6 KiB
JavaScript

import inherits from 'inherits';
import CommandInterceptor from 'diagram-js/lib/command/CommandInterceptor';
import {
getBusinessObject,
is
} from '../../../util/ModelUtil';
import { isLabel } from '../../../util/LabelUtil';
/**
* BPMN specific detach event behavior
*/
export default function DetachEventBehavior(eventBus, bpmnReplace) {
CommandInterceptor.call(this, eventBus);
/**
* replace boundary event with intermediate event when
* detaching from a shape
*/
this.preExecute('elements.move', function(context) {
var shapes = context.shapes,
host = context.newHost,
shape,
eventDefinition,
intermediateEvent,
newShape;
if (shapes.length !== 1) {
return;
}
shape = shapes[0];
if (!isLabel(shape) && !host && is(shape, 'bpmn:BoundaryEvent')) {
eventDefinition = getEventDefinition(shape);
if (eventDefinition) {
intermediateEvent = {
type: 'bpmn:IntermediateCatchEvent',
eventDefinitionType: eventDefinition.$type
};
} else {
intermediateEvent = {
type: 'bpmn:IntermediateThrowEvent'
};
}
newShape = bpmnReplace.replaceElement(shape, intermediateEvent);
context.shapes = [ newShape ];
}
}, true);
}
DetachEventBehavior.$inject = [
'eventBus',
'bpmnReplace'
];
inherits(DetachEventBehavior, CommandInterceptor);
// helper /////
function getEventDefinition(element) {
var bo = getBusinessObject(element);
return bo && bo.eventDefinitions && bo.eventDefinitions[0];
}