96 lines
2.4 KiB
JavaScript
96 lines
2.4 KiB
JavaScript
'use strict';
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var inherits = require('inherits');
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var assign = require('lodash/object/assign');
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var CommandInterceptor = require('diagram-js/lib/command/CommandInterceptor');
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var getApproxIntersection = require('diagram-js/lib/util/LineIntersection').getApproxIntersection;
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function copy(obj) {
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return assign({}, obj);
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}
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function CreateOnFlowBehavior(eventBus, bpmnRules, modeling) {
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CommandInterceptor.call(this, eventBus);
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/**
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* Reconnect start / end of a connection after
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* dropping an element on a flow.
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*/
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this.preExecute('shape.create', function(context) {
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var parent = context.parent,
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shape = context.shape;
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if (bpmnRules.canInsert(shape, parent)) {
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context.targetFlow = parent;
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context.parent = parent.parent;
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}
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}, true);
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this.postExecute('shape.create', function(context) {
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var shape = context.shape,
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targetFlow = context.targetFlow,
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position = context.position,
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source,
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target,
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reconnected,
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intersection,
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waypoints,
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waypointsBefore,
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waypointsAfter,
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dockingPoint;
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if (targetFlow) {
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waypoints = targetFlow.waypoints;
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intersection = getApproxIntersection(waypoints, position);
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if (intersection) {
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waypointsBefore = waypoints.slice(0, intersection.index);
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waypointsAfter = waypoints.slice(intersection.index + (intersection.bendpoint ? 1 : 0));
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dockingPoint = intersection.bendpoint ? waypoints[intersection.index] : position;
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waypointsBefore.push(copy(dockingPoint));
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waypointsAfter.unshift(copy(dockingPoint));
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}
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source = targetFlow.source;
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target = targetFlow.target;
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if (bpmnRules.canConnect(source, shape, targetFlow)) {
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// reconnect source -> inserted shape
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modeling.reconnectEnd(targetFlow, shape, waypointsBefore || copy(position));
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reconnected = true;
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}
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if (bpmnRules.canConnect(shape, target, targetFlow)) {
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if (!reconnected) {
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// reconnect inserted shape -> end
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modeling.reconnectStart(targetFlow, shape, waypointsAfter || copy(position));
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} else {
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modeling.connect(shape, target, { type: targetFlow.type, waypoints: waypointsAfter });
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}
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}
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}
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}, true);
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}
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inherits(CreateOnFlowBehavior, CommandInterceptor);
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CreateOnFlowBehavior.$inject = [ 'eventBus', 'bpmnRules', 'modeling' ];
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module.exports = CreateOnFlowBehavior;
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