92 lines
2.1 KiB
JavaScript
92 lines
2.1 KiB
JavaScript
'use strict';
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var is = require('../../util/ModelUtil').is;
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var isAny = require('../modeling/util/ModelingUtil').isAny;
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var getTextAnnotationPosition = require('./AutoPlaceUtil').getTextAnnotationPosition,
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getDataElementPosition = require('./AutoPlaceUtil').getDataElementPosition,
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getFlowNodePosition = require('./AutoPlaceUtil').getFlowNodePosition,
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getDefaultPosition = require('./AutoPlaceUtil').getDefaultPosition;
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/**
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* A service that places elements connected to existing ones
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* to an appropriate position in an _automated_ fashion.
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*
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* @param {EventBus} eventBus
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* @param {Modeling} modeling
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*/
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function AutoPlace(eventBus, modeling) {
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function emit(event, payload) {
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return eventBus.fire(event, payload);
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}
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/**
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* Append shape to source at appropriate position.
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*
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* @param {djs.model.Shape} source
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* @param {djs.model.Shape} shape
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*
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* @return {djs.model.Shape} appended shape
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*/
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this.append = function(source, shape) {
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// allow others to provide the position
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var position = emit('autoPlace', {
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source: source,
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shape: shape
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});
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if (!position) {
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position = getNewShapePosition(source, shape);
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}
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var newShape = modeling.appendShape(source, shape, position, source.parent);
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// notify interested parties on new shape placed
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emit('autoPlace.end', {
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shape: newShape
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});
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return newShape;
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};
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}
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AutoPlace.$inject = [
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'eventBus',
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'modeling'
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];
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module.exports = AutoPlace;
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// helpers //////////////////////
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/**
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* Find the new position for the target element to
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* connect to source.
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*
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* @param {djs.model.Shape} source
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* @param {djs.model.Shape} element
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*
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* @return {Point}
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*/
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function getNewShapePosition(source, element) {
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if (is(element, 'bpmn:TextAnnotation')) {
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return getTextAnnotationPosition(source, element);
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}
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if (isAny(element, [ 'bpmn:DataObjectReference', 'bpmn:DataStoreReference' ])) {
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return getDataElementPosition(source, element);
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}
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if (is(element, 'bpmn:FlowNode')) {
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return getFlowNodePosition(source, element);
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}
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return getDefaultPosition(source, element);
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}
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