feat(subprocesses): add boundary events to expanded view

lib/features/subprocess-navigation/SubprocessElements.js

@@ -0,0 +1,55 @@
+import { getBusinessObject, is } from '../../util/ModelUtil';
+
+export default function SubprocessElements(eventBus, elementRegistry, canvas, elementFactory) {
+  var attachBoundaries = function() {
+    var secondaryShapes = elementRegistry.filter(function(el) {
+      return is(el, 'bpmn:SubProcess') && el.isSecondary;
+    });
+
+    secondaryShapes.forEach(function(process) {
+
+      // Add Boundary events
+      if (process.primaryShape && process.primaryShape.attachers) {
+        process.primaryShape.attachers.forEach(function(boundary) {
+          var bo = getBusinessObject(boundary);
+
+          var primary = process.primaryShape;
+
+          var relativeXPos = (boundary.x + 15 - primary.x) / primary.width;
+          var relativeYPos = (boundary.y + 15 - primary.y) / primary.height;
+
+          var dx = process.x + (process.width * relativeXPos) - 15;
+          var dy = process.y + (process.height * relativeYPos) - 15;
+
+          var boundaryShape = elementFactory.createShape({
+            id: bo.id + '_secondary',
+            businessObject: bo,
+            type: 'bpmn:BoundaryEvent',
+            hidden: false,
+            x: dx,
+            y: dy,
+            width: 30,
+            height: 30,
+            isFrame: false,
+            isSecondary: true,
+            primaryShape: boundary,
+            di: boundary.di
+          });
+
+          canvas.addShape(boundaryShape, process.parent);
+
+          if (!process.attachers) {
+            process.attachers = [];
+          }
+
+          process.attachers.push(boundaryShape);
+        });
+      }
+    });
+  };
+
+  eventBus.on('import.done', attachBoundaries);
+}
+
+
+SubprocessElements.$inject = [ 'eventBus', 'elementRegistry', 'canvas', 'elementFactory' ];