74 lines
1.8 KiB
JavaScript
74 lines
1.8 KiB
JavaScript
'use strict';
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var inherits = require('inherits');
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var CommandInterceptor = require('diagram-js/lib/command/CommandInterceptor');
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var lineIntersect = require('./util/LineIntersect');
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function RemoveElementBehavior(eventBus, bpmnRules, modeling) {
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CommandInterceptor.call(this, eventBus);
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/**
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* Combine sequence flows when deleting an element
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* if there is one incoming and one outgoing
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* sequence flow
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*/
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this.preExecute('shape.delete', function(e) {
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var shape = e.context.shape;
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if (shape.incoming.length == 1 && shape.outgoing.length == 1) {
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var inConnection = shape.incoming[0],
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outConnection = shape.outgoing[0];
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if (bpmnRules.canConnect(inConnection.source, outConnection.target, inConnection)) {
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// compute new, combined waypoints
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var newWaypoints = getNewWaypoints(inConnection.waypoints, outConnection.waypoints);
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modeling.reconnectEnd(inConnection, outConnection.target, newWaypoints);
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}
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}
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});
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}
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inherits(RemoveElementBehavior, CommandInterceptor);
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RemoveElementBehavior.$inject = [ 'eventBus', 'bpmnRules', 'modeling' ];
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module.exports = RemoveElementBehavior;
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///////// helpers //////////////////////////////
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function getDocking(point) {
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return point.original || point;
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}
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function getNewWaypoints(inWaypoints, outWaypoints) {
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var intersection = lineIntersect(
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getDocking(inWaypoints[inWaypoints.length - 2]),
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getDocking(inWaypoints[inWaypoints.length - 1]),
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getDocking(outWaypoints[1]),
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getDocking(outWaypoints[0]));
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if (intersection) {
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return [].concat(
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inWaypoints.slice(0, inWaypoints.length - 1),
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[ intersection ],
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outWaypoints.slice(1));
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} else {
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return [
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getDocking(inWaypoints[0]),
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getDocking(outWaypoints[outWaypoints.length - 1])
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];
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}
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} |