922 lines
21 KiB
JavaScript
922 lines
21 KiB
JavaScript
import {
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find,
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some,
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every,
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forEach
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} from 'min-dash';
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import inherits from 'inherits';
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import {
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is,
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getBusinessObject
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} from '../../util/ModelUtil';
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import {
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isAny
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} from '../modeling/util/ModelingUtil';
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import {
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isLabel
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} from '../../util/LabelUtil';
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import {
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isExpanded,
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isEventSubProcess,
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isInterrupting,
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hasErrorEventDefinition,
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hasEscalationEventDefinition,
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hasCompensateEventDefinition
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} from '../../util/DiUtil';
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import RuleProvider from 'diagram-js/lib/features/rules/RuleProvider';
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import {
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getBoundaryAttachment as isBoundaryAttachment
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} from '../snapping/BpmnSnappingUtil';
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/**
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* BPMN specific modeling rule
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*/
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export default function BpmnRules(eventBus) {
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RuleProvider.call(this, eventBus);
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}
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inherits(BpmnRules, RuleProvider);
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BpmnRules.$inject = [ 'eventBus' ];
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BpmnRules.prototype.init = function() {
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this.addRule('connection.start', function(context) {
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var source = context.source;
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return canStartConnection(source);
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});
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this.addRule('connection.create', function(context) {
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var source = context.source,
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target = context.target,
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hints = context.hints || {},
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targetParent = hints.targetParent,
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targetAttach = hints.targetAttach;
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// don't allow incoming connections on
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// newly created boundary events
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// to boundary events
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if (targetAttach) {
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return false;
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}
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// temporarily set target parent for scoping
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// checks to work
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if (targetParent) {
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target.parent = targetParent;
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}
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try {
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return canConnect(source, target);
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} finally {
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// unset temporary target parent
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if (targetParent) {
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target.parent = null;
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}
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}
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});
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this.addRule('connection.reconnectStart', function(context) {
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var connection = context.connection,
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source = context.hover || context.source,
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target = connection.target;
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return canConnect(source, target, connection);
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});
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this.addRule('connection.reconnectEnd', function(context) {
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var connection = context.connection,
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source = connection.source,
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target = context.hover || context.target;
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return canConnect(source, target, connection);
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});
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this.addRule('connection.updateWaypoints', function(context) {
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// OK! but visually ignore
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return null;
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});
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this.addRule('shape.resize', function(context) {
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var shape = context.shape,
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newBounds = context.newBounds;
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return canResize(shape, newBounds);
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});
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this.addRule('elements.move', function(context) {
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var target = context.target,
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shapes = context.shapes,
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position = context.position;
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return canAttach(shapes, target, null, position) ||
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canReplace(shapes, target, position) ||
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canMove(shapes, target, position) ||
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canInsert(shapes, target, position);
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});
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this.addRule('shape.create', function(context) {
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return canCreate(
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context.shape,
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context.target,
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context.source,
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context.position
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);
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});
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this.addRule('shape.attach', function(context) {
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return canAttach(
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context.shape,
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context.target,
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null,
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context.position
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);
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});
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this.addRule('element.copy', function(context) {
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var collection = context.collection,
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element = context.element;
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return canCopy(collection, element);
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});
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this.addRule('element.paste', function(context) {
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var parent = context.parent,
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element = context.element,
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position = context.position,
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source = context.source,
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target = context.target;
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if (source || target) {
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return canConnect(source, target);
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}
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return canAttach([ element ], parent, null, position) || canCreate(element, parent, null, position);
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});
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this.addRule('elements.paste', function(context) {
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var tree = context.tree,
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target = context.target;
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return canPaste(tree, target);
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});
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};
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BpmnRules.prototype.canConnectMessageFlow = canConnectMessageFlow;
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BpmnRules.prototype.canConnectSequenceFlow = canConnectSequenceFlow;
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BpmnRules.prototype.canConnectDataAssociation = canConnectDataAssociation;
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BpmnRules.prototype.canConnectAssociation = canConnectAssociation;
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BpmnRules.prototype.canMove = canMove;
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BpmnRules.prototype.canAttach = canAttach;
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BpmnRules.prototype.canReplace = canReplace;
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BpmnRules.prototype.canDrop = canDrop;
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BpmnRules.prototype.canInsert = canInsert;
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BpmnRules.prototype.canCreate = canCreate;
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BpmnRules.prototype.canConnect = canConnect;
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BpmnRules.prototype.canResize = canResize;
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BpmnRules.prototype.canCopy = canCopy;
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/**
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* Utility functions for rule checking
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*/
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/**
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* Checks if given element can be used for starting connection.
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*
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* @param {Element} source
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* @return {Boolean}
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*/
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function canStartConnection(element) {
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if (nonExistingOrLabel(element)) {
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return null;
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}
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return isAny(element, [
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'bpmn:FlowNode',
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'bpmn:InteractionNode',
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'bpmn:DataObjectReference',
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'bpmn:DataStoreReference'
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]);
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}
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function nonExistingOrLabel(element) {
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return !element || isLabel(element);
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}
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function isSame(a, b) {
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return a === b;
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}
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function getOrganizationalParent(element) {
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do {
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if (is(element, 'bpmn:Process')) {
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return getBusinessObject(element);
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}
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if (is(element, 'bpmn:Participant')) {
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return (
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getBusinessObject(element).processRef ||
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getBusinessObject(element)
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);
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}
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} while ((element = element.parent));
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}
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function isTextAnnotation(element) {
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return is(element, 'bpmn:TextAnnotation');
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}
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function isCompensationBoundary(element) {
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return is(element, 'bpmn:BoundaryEvent') &&
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hasEventDefinition(element, 'bpmn:CompensateEventDefinition');
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}
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function isForCompensation(e) {
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return getBusinessObject(e).isForCompensation;
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}
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function isSameOrganization(a, b) {
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var parentA = getOrganizationalParent(a),
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parentB = getOrganizationalParent(b);
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return parentA === parentB;
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}
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function isMessageFlowSource(element) {
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return (
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is(element, 'bpmn:InteractionNode') && (
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!is(element, 'bpmn:Event') || (
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is(element, 'bpmn:ThrowEvent') &&
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hasEventDefinitionOrNone(element, 'bpmn:MessageEventDefinition')
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)
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)
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);
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}
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function isMessageFlowTarget(element) {
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return (
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is(element, 'bpmn:InteractionNode') &&
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!isForCompensation(element) && (
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!is(element, 'bpmn:Event') || (
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is(element, 'bpmn:CatchEvent') &&
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hasEventDefinitionOrNone(element, 'bpmn:MessageEventDefinition')
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)
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)
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);
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}
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function getScopeParent(element) {
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var parent = element;
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while ((parent = parent.parent)) {
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if (is(parent, 'bpmn:FlowElementsContainer')) {
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return getBusinessObject(parent);
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}
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if (is(parent, 'bpmn:Participant')) {
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return getBusinessObject(parent).processRef;
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}
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}
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return null;
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}
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function isSameScope(a, b) {
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var scopeParentA = getScopeParent(a),
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scopeParentB = getScopeParent(b);
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return scopeParentA && (scopeParentA === scopeParentB);
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}
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function hasEventDefinition(element, eventDefinition) {
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var bo = getBusinessObject(element);
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return !!find(bo.eventDefinitions || [], function(definition) {
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return is(definition, eventDefinition);
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});
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}
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function hasEventDefinitionOrNone(element, eventDefinition) {
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var bo = getBusinessObject(element);
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return (bo.eventDefinitions || []).every(function(definition) {
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return is(definition, eventDefinition);
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});
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}
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function isSequenceFlowSource(element) {
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return (
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is(element, 'bpmn:FlowNode') &&
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!is(element, 'bpmn:EndEvent') &&
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!isEventSubProcess(element) &&
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!(is(element, 'bpmn:IntermediateThrowEvent') &&
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hasEventDefinition(element, 'bpmn:LinkEventDefinition')
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) &&
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!isCompensationBoundary(element) &&
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!isForCompensation(element)
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);
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}
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function isSequenceFlowTarget(element) {
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return (
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is(element, 'bpmn:FlowNode') &&
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!is(element, 'bpmn:StartEvent') &&
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!is(element, 'bpmn:BoundaryEvent') &&
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!isEventSubProcess(element) &&
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!(is(element, 'bpmn:IntermediateCatchEvent') &&
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hasEventDefinition(element, 'bpmn:LinkEventDefinition')
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) &&
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!isForCompensation(element)
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);
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}
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function isEventBasedTarget(element) {
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return (
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is(element, 'bpmn:ReceiveTask') || (
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is(element, 'bpmn:IntermediateCatchEvent') && (
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hasEventDefinition(element, 'bpmn:MessageEventDefinition') ||
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hasEventDefinition(element, 'bpmn:TimerEventDefinition') ||
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hasEventDefinition(element, 'bpmn:ConditionalEventDefinition') ||
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hasEventDefinition(element, 'bpmn:SignalEventDefinition')
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)
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)
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);
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}
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function isConnection(element) {
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return element.waypoints;
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}
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function getParents(element) {
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var parents = [];
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while (element) {
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element = element.parent;
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if (element) {
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parents.push(element);
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}
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}
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return parents;
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}
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function isParent(possibleParent, element) {
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var allParents = getParents(element);
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return allParents.indexOf(possibleParent) !== -1;
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}
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function canConnect(source, target, connection) {
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if (nonExistingOrLabel(source) || nonExistingOrLabel(target)) {
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return null;
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}
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if (!is(connection, 'bpmn:DataAssociation')) {
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if (canConnectMessageFlow(source, target)) {
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return { type: 'bpmn:MessageFlow' };
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}
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if (canConnectSequenceFlow(source, target)) {
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return { type: 'bpmn:SequenceFlow' };
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}
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}
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var connectDataAssociation = canConnectDataAssociation(source, target);
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if (connectDataAssociation) {
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return connectDataAssociation;
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}
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if (isCompensationBoundary(source) && isForCompensation(target)) {
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return {
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type: 'bpmn:Association',
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associationDirection: 'One'
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};
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}
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if (canConnectAssociation(source, target)) {
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return {
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type: 'bpmn:Association'
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};
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}
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return false;
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}
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/**
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* Can an element be dropped into the target element
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*
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* @return {Boolean}
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*/
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function canDrop(element, target, position) {
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// can move labels everywhere
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if (isLabel(element)) {
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return true;
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}
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// disallow to create elements on collapsed pools
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if (is(target, 'bpmn:Participant') && !isExpanded(target)) {
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return false;
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}
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// allow to create new participants on
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// on existing collaboration and process diagrams
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if (is(element, 'bpmn:Participant')) {
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return is(target, 'bpmn:Process') || is(target, 'bpmn:Collaboration');
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}
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// allow moving DataInput / DataOutput within its original container only
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if (isAny(element, [ 'bpmn:DataInput', 'bpmn:DataOutput' ])) {
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if (element.parent) {
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return target === element.parent;
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}
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}
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// allow creating lanes on participants and other lanes only
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if (is(element, 'bpmn:Lane')) {
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return is(target, 'bpmn:Participant') || is(target, 'bpmn:Lane');
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}
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if (is(element, 'bpmn:BoundaryEvent')) {
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return false;
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}
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// drop flow elements onto flow element containers
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// and participants
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if (is(element, 'bpmn:FlowElement') && !is(element, 'bpmn:DataStoreReference')) {
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if (is(target, 'bpmn:FlowElementsContainer')) {
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return isExpanded(target);
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}
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return isAny(target, [ 'bpmn:Participant', 'bpmn:Lane' ]);
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}
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// account for the fact that data associations are always
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// rendered and moved to top (Process or Collaboration level)
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//
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// artifacts may be placed wherever, too
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if (isAny(element, [ 'bpmn:Artifact', 'bpmn:DataAssociation', 'bpmn:DataStoreReference' ])) {
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return isAny(target, [
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'bpmn:Collaboration',
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'bpmn:Lane',
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'bpmn:Participant',
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'bpmn:Process',
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'bpmn:SubProcess' ]);
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}
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if (is(element, 'bpmn:MessageFlow')) {
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return is(target, 'bpmn:Collaboration')
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|| element.source.parent == target
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|| element.target.parent == target;
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}
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return false;
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}
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function canPaste(tree, target) {
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var topLevel = tree[0],
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participants;
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if (is(target, 'bpmn:Collaboration')) {
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return every(topLevel, function(e) {
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return e.type === 'bpmn:Participant';
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});
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}
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if (is(target, 'bpmn:Process')) {
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participants = some(topLevel, function(e) {
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return e.type === 'bpmn:Participant';
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});
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return !(participants && target.children.length > 0);
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}
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|
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// disallow to create elements on collapsed pools
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if (is(target, 'bpmn:Participant') && !isExpanded(target)) {
|
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return false;
|
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}
|
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|
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if (is(target, 'bpmn:FlowElementsContainer')) {
|
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return isExpanded(target);
|
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}
|
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return isAny(target, [
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'bpmn:Collaboration',
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'bpmn:Lane',
|
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'bpmn:Participant',
|
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'bpmn:Process',
|
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'bpmn:SubProcess' ]);
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}
|
|
|
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function isBoundaryEvent(element) {
|
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return !isLabel(element) && is(element, 'bpmn:BoundaryEvent');
|
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}
|
|
|
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function isLane(element) {
|
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return is(element, 'bpmn:Lane');
|
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}
|
|
|
|
/**
|
|
* We treat IntermediateThrowEvents as boundary events during create,
|
|
* this must be reflected in the rules.
|
|
*/
|
|
function isBoundaryCandidate(element) {
|
|
return isBoundaryEvent(element) ||
|
|
(is(element, 'bpmn:IntermediateThrowEvent') && !element.parent);
|
|
}
|
|
|
|
function isReceiveTaskAfterEventBasedGateway(element) {
|
|
return (
|
|
is(element, 'bpmn:ReceiveTask') &&
|
|
find(element.incoming, function(incoming) {
|
|
return is(incoming.source, 'bpmn:EventBasedGateway');
|
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})
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);
|
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}
|
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|
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|
|
function canAttach(elements, target, source, position) {
|
|
|
|
if (!Array.isArray(elements)) {
|
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elements = [ elements ];
|
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}
|
|
|
|
// disallow appending as boundary event
|
|
if (source) {
|
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return false;
|
|
}
|
|
|
|
// only (re-)attach one element at a time
|
|
if (elements.length !== 1) {
|
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return false;
|
|
}
|
|
|
|
var element = elements[0];
|
|
|
|
// do not attach labels
|
|
if (isLabel(element)) {
|
|
return false;
|
|
}
|
|
|
|
// only handle boundary events
|
|
if (!isBoundaryCandidate(element)) {
|
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return false;
|
|
}
|
|
|
|
// allow default move operation
|
|
if (!target) {
|
|
return true;
|
|
}
|
|
|
|
// disallow drop on event sub processes
|
|
if (isEventSubProcess(target)) {
|
|
return false;
|
|
}
|
|
|
|
// only allow drop on non compensation activities
|
|
if (!is(target, 'bpmn:Activity') || isForCompensation(target)) {
|
|
return false;
|
|
}
|
|
|
|
// only attach to subprocess border
|
|
if (position && !isBoundaryAttachment(position, target)) {
|
|
return false;
|
|
}
|
|
|
|
// do not attach on receive tasks after event based gateways
|
|
if (isReceiveTaskAfterEventBasedGateway(target)) {
|
|
return false;
|
|
}
|
|
|
|
return 'attach';
|
|
}
|
|
|
|
|
|
/**
|
|
* Defines how to replace elements for a given target.
|
|
*
|
|
* Returns an array containing all elements which will be replaced.
|
|
*
|
|
* @example
|
|
*
|
|
* [{ id: 'IntermediateEvent_2',
|
|
* type: 'bpmn:StartEvent'
|
|
* },
|
|
* { id: 'IntermediateEvent_5',
|
|
* type: 'bpmn:EndEvent'
|
|
* }]
|
|
*
|
|
* @param {Array} elements
|
|
* @param {Object} target
|
|
*
|
|
* @return {Object} an object containing all elements which have to be replaced
|
|
*/
|
|
function canReplace(elements, target, position) {
|
|
|
|
if (!target) {
|
|
return false;
|
|
}
|
|
|
|
var canExecute = {
|
|
replacements: []
|
|
};
|
|
|
|
forEach(elements, function(element) {
|
|
|
|
if (!isEventSubProcess(target)) {
|
|
|
|
if (is(element, 'bpmn:StartEvent') &&
|
|
element.type !== 'label' &&
|
|
canDrop(element, target)) {
|
|
|
|
// replace a non-interrupting start event by a blank interrupting start event
|
|
// when the target is not an event sub process
|
|
if (!isInterrupting(element)) {
|
|
canExecute.replacements.push({
|
|
oldElementId: element.id,
|
|
newElementType: 'bpmn:StartEvent'
|
|
});
|
|
}
|
|
|
|
// replace an error/escalation/compansate start event by a blank interrupting start event
|
|
// when the target is not an event sub process
|
|
if (hasErrorEventDefinition(element) ||
|
|
hasEscalationEventDefinition(element) ||
|
|
hasCompensateEventDefinition(element)) {
|
|
canExecute.replacements.push({
|
|
oldElementId: element.id,
|
|
newElementType: 'bpmn:StartEvent'
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!is(target, 'bpmn:Transaction')) {
|
|
if (hasEventDefinition(element, 'bpmn:CancelEventDefinition') &&
|
|
element.type !== 'label') {
|
|
|
|
if (is(element, 'bpmn:EndEvent') && canDrop(element, target)) {
|
|
canExecute.replacements.push({
|
|
oldElementId: element.id,
|
|
newElementType: 'bpmn:EndEvent'
|
|
});
|
|
}
|
|
|
|
if (is(element, 'bpmn:BoundaryEvent') && canAttach(element, target, null, position)) {
|
|
canExecute.replacements.push({
|
|
oldElementId: element.id,
|
|
newElementType: 'bpmn:BoundaryEvent'
|
|
});
|
|
}
|
|
}
|
|
}
|
|
});
|
|
|
|
return canExecute.replacements.length ? canExecute : false;
|
|
}
|
|
|
|
function canMove(elements, target) {
|
|
|
|
// do not move selection containing boundary events
|
|
if (some(elements, isBoundaryEvent)) {
|
|
return false;
|
|
}
|
|
|
|
// do not move selection containing lanes
|
|
if (some(elements, isLane)) {
|
|
return false;
|
|
}
|
|
|
|
// allow default move check to start move operation
|
|
if (!target) {
|
|
return true;
|
|
}
|
|
|
|
return elements.every(function(element) {
|
|
return canDrop(element, target);
|
|
});
|
|
}
|
|
|
|
function canCreate(shape, target, source, position) {
|
|
|
|
if (!target) {
|
|
return false;
|
|
}
|
|
|
|
if (isLabel(target)) {
|
|
return null;
|
|
}
|
|
|
|
if (isSame(source, target)) {
|
|
return false;
|
|
}
|
|
|
|
// ensure we do not drop the element
|
|
// into source
|
|
if (source && isParent(source, target)) {
|
|
return false;
|
|
}
|
|
|
|
return canDrop(shape, target, position) || canInsert(shape, target, position);
|
|
}
|
|
|
|
function canResize(shape, newBounds) {
|
|
if (is(shape, 'bpmn:SubProcess')) {
|
|
return (
|
|
isExpanded(shape) && (
|
|
!newBounds || (newBounds.width >= 100 && newBounds.height >= 80)
|
|
)
|
|
);
|
|
}
|
|
|
|
if (is(shape, 'bpmn:Lane')) {
|
|
return !newBounds || (newBounds.width >= 130 && newBounds.height >= 60);
|
|
}
|
|
|
|
if (is(shape, 'bpmn:Participant')) {
|
|
return !newBounds || (newBounds.width >= 250 && newBounds.height >= 50);
|
|
}
|
|
|
|
if (isTextAnnotation(shape)) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Check, whether one side of the relationship
|
|
* is a text annotation.
|
|
*/
|
|
function isOneTextAnnotation(source, target) {
|
|
|
|
var sourceTextAnnotation = isTextAnnotation(source),
|
|
targetTextAnnotation = isTextAnnotation(target);
|
|
|
|
return (
|
|
(sourceTextAnnotation || targetTextAnnotation) &&
|
|
(sourceTextAnnotation !== targetTextAnnotation)
|
|
);
|
|
}
|
|
|
|
|
|
function canConnectAssociation(source, target) {
|
|
|
|
// do not connect connections
|
|
if (isConnection(source) || isConnection(target)) {
|
|
return false;
|
|
}
|
|
|
|
// compensation boundary events are exception
|
|
if (isCompensationBoundary(source) && isForCompensation(target)) {
|
|
return true;
|
|
}
|
|
|
|
// don't connect parent <-> child
|
|
if (isParent(target, source) || isParent(source, target)) {
|
|
return false;
|
|
}
|
|
|
|
// allow connection of associations between <!TextAnnotation> and <TextAnnotation>
|
|
return isOneTextAnnotation(source, target);
|
|
}
|
|
|
|
function canConnectMessageFlow(source, target) {
|
|
|
|
return isMessageFlowSource(source) &&
|
|
isMessageFlowTarget(target) &&
|
|
!isSameOrganization(source, target);
|
|
}
|
|
|
|
function canConnectSequenceFlow(source, target) {
|
|
|
|
if (
|
|
isEventBasedTarget(target) &&
|
|
target.incoming.length > 0 &&
|
|
areOutgoingEventBasedGatewayConnections(target.incoming) &&
|
|
!is(source, 'bpmn:EventBasedGateway')
|
|
) {
|
|
return false;
|
|
}
|
|
|
|
return isSequenceFlowSource(source) &&
|
|
isSequenceFlowTarget(target) &&
|
|
isSameScope(source, target) &&
|
|
!(is(source, 'bpmn:EventBasedGateway') && !isEventBasedTarget(target));
|
|
}
|
|
|
|
|
|
function canConnectDataAssociation(source, target) {
|
|
|
|
if (isAny(source, [ 'bpmn:DataObjectReference', 'bpmn:DataStoreReference' ]) &&
|
|
isAny(target, [ 'bpmn:Activity', 'bpmn:ThrowEvent' ])) {
|
|
return { type: 'bpmn:DataInputAssociation' };
|
|
}
|
|
|
|
if (isAny(target, [ 'bpmn:DataObjectReference', 'bpmn:DataStoreReference' ]) &&
|
|
isAny(source, [ 'bpmn:Activity', 'bpmn:CatchEvent' ])) {
|
|
return { type: 'bpmn:DataOutputAssociation' };
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
function canInsert(shape, flow, position) {
|
|
|
|
if (!flow) {
|
|
return false;
|
|
}
|
|
|
|
if (Array.isArray(shape)) {
|
|
if (shape.length !== 1) {
|
|
return false;
|
|
}
|
|
|
|
shape = shape[0];
|
|
}
|
|
|
|
if (flow.source === shape ||
|
|
flow.target === shape) {
|
|
return false;
|
|
}
|
|
|
|
// return true if we can drop on the
|
|
// underlying flow parent
|
|
//
|
|
// at this point we are not really able to talk
|
|
// about connection rules (yet)
|
|
|
|
return (
|
|
isAny(flow, [ 'bpmn:SequenceFlow', 'bpmn:MessageFlow' ]) &&
|
|
!isLabel(flow) &&
|
|
is(shape, 'bpmn:FlowNode') &&
|
|
!is(shape, 'bpmn:BoundaryEvent') &&
|
|
canDrop(shape, flow.parent, position));
|
|
}
|
|
|
|
function contains(collection, element) {
|
|
return (collection && element) && collection.indexOf(element) !== -1;
|
|
}
|
|
|
|
function canCopy(collection, element) {
|
|
if (is(element, 'bpmn:Lane') && !contains(collection, element.parent)) {
|
|
return false;
|
|
}
|
|
|
|
if (is(element, 'bpmn:BoundaryEvent') && !contains(collection, element.host)) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
function isOutgoingEventBasedGatewayConnection(connection) {
|
|
|
|
if (connection && connection.source) {
|
|
return is(connection.source, 'bpmn:EventBasedGateway');
|
|
}
|
|
}
|
|
|
|
function areOutgoingEventBasedGatewayConnections(connections) {
|
|
|
|
connections = connections || [];
|
|
|
|
return connections.some(isOutgoingEventBasedGatewayConnection);
|
|
}
|