fix(layout): Fix the issues with displaying vtkjs viewports (#500)

* fix(dependencies): Bump react-cornerstone-viewport to 0.1.29

* fix(dependencies): Bump ohif-cornerstone-extension to 0.0.32

* fix(layout): Get missing display set fields in viewport specific data from the original display set

* fix(layout): Cache the viewport data to be used for the replaced viewport when it is empty since viewportSpecificData is cleaned when viewport is changed

src/connectedComponents/ViewerMain.js

@@ -28,6 +28,8 @@ class ViewerMain extends Component {
     this.state = {
       displaySets: [],
     }
+
+    this.cachedViewportData = {}
   }
 
   getDisplaySets(studies) {
@@ -81,8 +83,25 @@ class ViewerMain extends Component {
     ) {
       let displaySet = viewportSpecificData[viewportIndex]
 
-      // If the viewport is empty, get one available in study
-      if (!displaySet || !displaySet.displaySetInstanceUid) {
+      // Use the cached display set in viewport if the new one is empty
+      if (displaySet && !displaySet.displaySetInstanceUid) {
+        displaySet = this.cachedViewportData[viewportIndex]
+      }
+
+      if (
+        displaySet &&
+        displaySet.studyInstanceUid &&
+        displaySet.displaySetInstanceUid
+      ) {
+        // Get missing fields from original display set
+        const originalDisplaySet = this.findDisplaySet(
+          this.props.studies,
+          displaySet.studyInstanceUid,
+          displaySet.displaySetInstanceUid
+        )
+        viewportData.push(Object.assign({}, originalDisplaySet, displaySet))
+      } else {
+        // If the viewport is empty, get one available in study
         const { displaySets } = this.state
         displaySet = displaySets.find(
           ds =>
@@ -90,11 +109,12 @@ class ViewerMain extends Component {
               v => v.displaySetInstanceUid === ds.displaySetInstanceUid
             )
         )
+        viewportData.push(Object.assign({}, displaySet))
       }
-
-      viewportData.push(displaySet)
     }
 
+    this.cachedViewportData = viewportData
+
     return viewportData
   }