FormHelper.js
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'use strict';
var getBusinessObject = require('bpmn-js/lib/util/ModelUtil').getBusinessObject,
getExtensionElements = require('./ExtensionElementsHelper').getExtensionElements;
var FormHelper = {};
module.exports = FormHelper;
/**
* Return form data from business object or undefined if none exist
*
* @param {djs.model.Base} element
*
* @return {ModdleElement|undefined} formData
*
* 此方法废弃
*
*/
FormHelper.getFormData = function(element) {
/* var bo = getBusinessObject(element);
var formFields = getExtensionElements(bo, 'activiti:FormProperty');
var formData = {}
if (typeof formData !== 'undefined') {
return formData[0];
}*/
return {};
};
/**
* Return all form fields existing in the business object, and
* an empty array if none exist.
*
* @param {djs.model.Base} element
*
* @return {Array} a list of form field objects
*/
FormHelper.getFormFields = function(element) {
/**直接获取 ExtensionElements的 activiti:FormProperty元素*/
var bo = getBusinessObject(element);
var formFields = getExtensionElements(bo, 'activiti:FormProperty');
return formFields || [];
};
/**
* Get a form field from the business object at given index
*
* @param {djs.model.Base} element
* @param {number} idx
*
* @return {ModdleElement} the form field
*/
FormHelper.getFormField = function(element, idx) {
var formFields = this.getFormFields(element);
return formFields[idx];
};
/**
* Get all constraints for a specific form field from the business object
*
* @param {ModdleElement} formField
*
* @return {Array<ModdleElement>} a list of constraint objects
*/
FormHelper.getConstraints = function(formField) {
if (formField && formField.validation && formField.validation.constraints) {
return formField.validation.constraints;
}
return [];
};
/**
* Get all activiti:value objects for a specific form field from the business object
*
* @param {ModdleElement} formField
*
* @return {Array<ModdleElement>} a list of activiti:value objects
*/
FormHelper.getEnumValues = function(formField) {
if (formField && formField.values) {
return formField.values;
}
return [];
};