bpmn-js/lib/features/modeling/behavior/CreateBehavior.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;
/**
* BPMN specific create behavior
*/
function CreateBehavior(eventBus, modeling) {
CommandInterceptor.call(this, eventBus);
/**
* morph process into collaboration before adding
* participant onto collaboration
*/
this.preExecute('shape.create', function(context) {
var parent = context.parent,
shape = context.shape,
position = context.position;
if (is(parent, 'bpmn:Process') && is(shape, 'bpmn:Participant')) {
// this is going to detach the process root
// and set the returned collaboration element
// as the new root element
var collaborationElement = modeling.makeCollaboration();
// monkey patch the create context
// so that the participant is being dropped
// onto the new collaboration root instead
context.position = position;
context.parent = collaborationElement;
context.processRoot = parent;
}
}, true);
this.execute('shape.create', function(context) {
var processRoot = context.processRoot,
shape = context.shape;
if (processRoot) {
context.oldProcessRef = shape.businessObject.processRef;
// assign the participant processRef
shape.businessObject.processRef = processRoot.businessObject;
}
}, true);
this.revert('shape.create', function(context) {
var processRoot = context.processRoot,
shape = context.shape;
if (processRoot) {
// assign the participant processRef
shape.businessObject.processRef = context.oldProcessRef;
}
}, true);
this.postExecute('shape.create', function(context) {
var processRoot = context.processRoot,
shape = context.shape;
if (processRoot) {
// process root is already detached at this point
var processChildren = processRoot.children.slice();
modeling.moveShapes(processChildren, { x: 0, y: 0 }, shape);
}
}, true);
}
CreateBehavior.$inject = [ 'eventBus', 'modeling' ];
inherits(CreateBehavior, CommandInterceptor);
module.exports = CreateBehavior;