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

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'use strict';
var inherits = require('inherits');
var CommandInterceptor = require('diagram-js/lib/command/CommandInterceptor');
var is = require('../../../util/ModelUtil').is,
getBusinessObject = require('../../../util/ModelUtil').getBusinessObject;
/**
* A behavior that unsets the Default property of
* sequence flow source on element delete, if the
* removed element is the Gateway or Task's default flow.
*
* @param {EventBus} eventBus
* @param {Modeling} modeling
*/
function DeleteSequenceFlowBehavior(eventBus, modeling) {
CommandInterceptor.call(this, eventBus);
this.preExecute('connection.delete', function(event) {
var context = event.context,
connection = context.connection,
source = connection.source;
if (isDefaultFlow(connection, source)) {
modeling.updateProperties(source, {
'default': null
});
}
});
}
inherits(DeleteSequenceFlowBehavior, CommandInterceptor);
DeleteSequenceFlowBehavior.$inject = [ 'eventBus', 'modeling' ];
module.exports = DeleteSequenceFlowBehavior;
/////// helpers ///////////////////////////
function isDefaultFlow(connection, source) {
if (!is(connection, 'bpmn:SequenceFlow')) {
return false;
}
var sourceBo = getBusinessObject(source),
sequenceFlow = getBusinessObject(connection);
return sourceBo.get('default') === sequenceFlow;
}