140 lines
3.2 KiB
JavaScript
140 lines
3.2 KiB
JavaScript
'use strict';
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var inherits = require('inherits');
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var OrderingProvider = require('diagram-js/lib/features/ordering/OrderingProvider');
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var isAny = require('../modeling/util/ModelingUtil').isAny;
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var findIndex = require('lodash/array/findIndex');
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var find = require('lodash/collection/find');
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/**
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* a simple ordering provider that makes sure:
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*
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* (1) elements are ordered by a {level} property
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* (2) elements with {alwaysOnTop} are always added to the root
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*/
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function BpmnOrderingProvider(eventBus) {
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OrderingProvider.call(this, eventBus);
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var orders = [
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{ type: 'label', order: { level: 10 } },
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{ type: 'bpmn:SubProcess', order: { level: 6 } },
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{
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type: 'bpmn:SequenceFlow',
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order: {
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level: 5,
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containers: [
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'bpmn:Participant',
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'bpmn:FlowElementsContainer'
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]
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}
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},
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{
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type: 'bpmn:Association',
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order: {
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level: 6,
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containers: [
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'bpmn:Participant',
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'bpmn:FlowElementsContainer',
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'bpmn:Collaboration'
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]
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}
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},
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{ type: 'bpmn:MessageFlow', order: { level: 9, containers: [ 'bpmn:Collaboration' ] } },
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{ type: 'bpmn:BoundaryEvent', order: { level: 8 } },
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{ type: 'bpmn:Participant', order: { level: -2 } },
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{ type: 'bpmn:Lane', order: { level: -1 } }
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];
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function computeOrder(element) {
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var entry = find(orders, function(o) {
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return element.type === o.type;
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});
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return entry && entry.order || { level: 1 };
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}
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function getOrder(element) {
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var order = element.order;
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if (!order) {
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element.order = order = computeOrder(element);
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}
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return order;
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}
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function findActualParent(element, newParent, containers) {
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var actualParent = newParent;
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while (actualParent) {
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if (isAny(actualParent, containers)) {
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break;
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}
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actualParent = actualParent.parent;
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}
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if (!actualParent) {
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throw new Error('no parent for ' + element.id + ' in ' + newParent.id);
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}
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return actualParent;
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}
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this.getOrdering = function(element, newParent) {
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var elementOrder = getOrder(element);
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if (elementOrder.containers) {
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newParent = findActualParent(element, newParent, elementOrder.containers);
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}
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var currentIndex = newParent.children.indexOf(element);
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var insertIndex = findIndex(newParent.children, function(child) {
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// do not compare with labels, they are created
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// in the wrong order (right after elements) during import and
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// mess up the positioning.
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if (!element.labelTarget && child.labelTarget) {
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return false;
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}
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return elementOrder.level < getOrder(child).level;
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});
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// if the element is already in the child list at
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// a smaller index, we need to adjust the inser index.
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// this takes into account that the element is being removed
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// before being re-inserted
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if (insertIndex !== -1) {
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if (currentIndex !== -1 && currentIndex < insertIndex) {
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insertIndex -= 1;
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}
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}
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return {
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index: insertIndex,
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parent: newParent
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};
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};
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}
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BpmnOrderingProvider.$inject = [ 'eventBus' ];
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inherits(BpmnOrderingProvider, OrderingProvider);
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module.exports = BpmnOrderingProvider;
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