bpmn-js/lib/features/modeling/cmd/UpdatePropertiesHandler.js

99 lines
2.5 KiB
JavaScript
Raw Normal View History

'use strict';
var assign = require('lodash/object/assign'),
pick = require('lodash/object/pick'),
keys = require('lodash/object/keys');
var DEFAULT_FLOW = 'default',
NAME = 'name';
/**
* A handler that implements a BPMN 2.0 property update.
*
* This should be used to set simple properties on elements with
* an underlying BPMN business object.
*
* Use respective diagram-js provided handlers if you would
* like to perform automated modeling.
*/
function UpdatePropertiesHandler(elementRegistry) {
this._elementRegistry = elementRegistry;
}
UpdatePropertiesHandler.$inject = [ 'elementRegistry' ];
module.exports = UpdatePropertiesHandler;
////// api /////////////////////////////////////////////
/**
* Updates a BPMN element with a list of new properties
*
* @param {Object} context
* @param {djs.model.Base} context.element the element to update
* @param {Object} context.properties a list of properties to set on the element's
* businessObject (the BPMN model element)
*
* @return {Array<djs.mode.Base>} the updated element
*/
UpdatePropertiesHandler.prototype.execute = function(context) {
var element = context.element,
changed = [ element ];
if (!element) {
throw new Error('element required');
}
var elementRegistry = this._elementRegistry;
var businessObject = element.businessObject,
properties = context.properties,
oldProperties = context.oldProperties || pick(businessObject, keys(properties));
// correctly indicate visual changes on default flow updates
if (DEFAULT_FLOW in properties) {
if (properties[DEFAULT_FLOW]) {
changed.push(elementRegistry.get(properties[DEFAULT_FLOW].id));
}
if (businessObject[DEFAULT_FLOW]) {
changed.push(elementRegistry.get(businessObject[DEFAULT_FLOW].id));
}
}
if (NAME in properties && element.label) {
changed.push(element.label);
}
// update properties
assign(businessObject, properties);
// store old values
context.oldProperties = oldProperties;
context.changed = changed;
// indicate changed on objects affected by the update
return changed;
};
/**
* Reverts the update on a BPMN elements properties.
*
* @param {Object} context
*
* @return {djs.mode.Base} the updated element
*/
UpdatePropertiesHandler.prototype.revert = function(context) {
var element = context.element,
businessObject = element.businessObject;
assign(businessObject, context.oldProperties);
return context.changed;
};