138 lines
3.0 KiB
JavaScript
138 lines
3.0 KiB
JavaScript
import { is } from '../../util/ModelUtil';
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import { isAny } from '../modeling/util/ModelingUtil';
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import {
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getMid,
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asTRBL,
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getOrientation
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} from 'diagram-js/lib/layout/LayoutUtil';
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import {
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findFreePosition,
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generateGetNextPosition,
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getConnectedDistance
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} from 'diagram-js/lib/features/auto-place/AutoPlaceUtil';
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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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export 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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}
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/**
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* Always try to place element right of source;
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* compute actual distance from previous nodes in flow.
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*/
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export function getFlowNodePosition(source, element) {
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var sourceTrbl = asTRBL(source);
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var sourceMid = getMid(source);
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var horizontalDistance = getConnectedDistance(source, {
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filter: function(connection) {
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return is(connection, 'bpmn:SequenceFlow');
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}
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});
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var margin = 30,
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minDistance = 80,
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orientation = 'left';
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if (is(source, 'bpmn:BoundaryEvent')) {
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orientation = getOrientation(source, source.host, -25);
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if (orientation.indexOf('top') !== -1) {
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margin *= -1;
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}
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}
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var position = {
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x: sourceTrbl.right + horizontalDistance + element.width / 2,
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y: sourceMid.y + getVerticalDistance(orientation, minDistance)
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};
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var nextPositionDirection = {
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y: {
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margin: margin,
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minDistance: minDistance
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}
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};
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return findFreePosition(source, element, position, generateGetNextPosition(nextPositionDirection));
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}
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function getVerticalDistance(orientation, minDistance) {
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if (orientation.indexOf('top') != -1) {
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return -1 * minDistance;
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} else if (orientation.indexOf('bottom') != -1) {
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return minDistance;
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} else {
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return 0;
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}
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}
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/**
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* Always try to place text annotations top right of source.
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*/
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export function getTextAnnotationPosition(source, element) {
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var sourceTrbl = asTRBL(source);
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var position = {
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x: sourceTrbl.right + element.width / 2,
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y: sourceTrbl.top - 50 - element.height / 2
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};
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var nextPositionDirection = {
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y: {
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margin: -30,
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minDistance: 20
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}
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};
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return findFreePosition(source, element, position, generateGetNextPosition(nextPositionDirection));
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}
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/**
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* Always put element bottom right of source.
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*/
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export function getDataElementPosition(source, element) {
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var sourceTrbl = asTRBL(source);
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var position = {
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x: sourceTrbl.right - 10 + element.width / 2,
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y: sourceTrbl.bottom + 40 + element.width / 2
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};
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var nextPositionDirection = {
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x: {
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margin: 30,
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minDistance: 30
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}
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};
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return findFreePosition(source, element, position, generateGetNextPosition(nextPositionDirection));
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} |