fix(viewport): Initial blank image on SR/SEG initial display (#3304)

* fix: Blank display area on initial DICOM SR load

* Docs

* Fix a NPE

extensions/cornerstone-dicom-sr/src/getHangingProtocolModule.ts

@@ -0,0 +1,78 @@
+import { Types } from '@ohif/core';
+
+const srProtocol: Types.HangingProtocol.Protocol = {
+  id: '@ohif/sr',
+  // Don't store this hanging protocol as it applies to the currently active
+  // display set by default
+  // cacheId: null,
+  hasUpdatedPriorsInformation: false,
+  name: 'SR Key Images',
+  // Just apply this one when specifically listed
+  protocolMatchingRules: [],
+  toolGroupIds: ['default'],
+  // -1 would be used to indicate active only, whereas other values are
+  // the number of required priors referenced - so 0 means active with
+  // 0 or more priors.
+  numberOfPriorsReferenced: 0,
+  // Default viewport is used to define the viewport when
+  // additional viewports are added using the layout tool
+  defaultViewport: {
+    viewportOptions: {
+      viewportType: 'stack',
+      toolGroupId: 'default',
+      allowUnmatchedView: true,
+    },
+    displaySets: [
+      {
+        id: 'srDisplaySetId',
+        matchedDisplaySetsIndex: -1,
+      },
+    ],
+  },
+  displaySetSelectors: {
+    srDisplaySetId: {
+      seriesMatchingRules: [
+        {
+          attribute: 'Modality',
+          constraint: {
+            equals: 'SR',
+          },
+        },
+      ],
+    },
+  },
+  stages: [
+    {
+      name: 'SR Key Images',
+      viewportStructure: {
+        layoutType: 'grid',
+        properties: {
+          rows: 1,
+          columns: 1,
+        },
+      },
+      viewports: [
+        {
+          viewportOptions: { allowUnmatchedView: true },
+          displaySets: [
+            {
+              id: 'srDisplaySetId',
+            },
+          ],
+        },
+      ],
+    },
+  ],
+};
+
+function getHangingProtocolModule() {
+  return [
+    {
+      name: srProtocol.id,
+      protocol: srProtocol,
+    },
+  ];
+}
+
+export default getHangingProtocolModule;
+export { srProtocol };

extensions/cornerstone-dicom-sr/src/index.tsx

@@ -1,8 +1,11 @@
 import React from 'react';
 import getSopClassHandlerModule from './getSopClassHandlerModule';
+import getHangingProtocolModule, {
+  srProtocol,
+} from './getHangingProtocolModule';
 import onModeEnter from './onModeEnter';
-import commandsModule from './commandsModule';
+import getCommandsModule from './commandsModule';
-import init from './init';
+import preRegistration from './init';
 import { id } from './id.js';
 import toolNames from './tools/toolNames';
 import hydrateStructuredReport from './utils/hydrateStructuredReport';
@@ -31,9 +34,7 @@ const dicomSRExtension = {
   id,
   onModeEnter,
 
-  preRegistration({ servicesManager, configuration = {} }) {
+  preRegistration,
-    init({ servicesManager, configuration });
-  },
 
   /**
    *
@@ -54,14 +55,11 @@ const dicomSRExtension = {
 
     return [{ name: 'dicom-sr', component: ExtendedOHIFCornerstoneSRViewport }];
   },
-  getCommandsModule({ servicesManager, commandsManager, extensionManager }) {
+  getCommandsModule,
-    return commandsModule({
-      servicesManager,
-      commandsManager,
-      extensionManager,
-    });
-  },
   getSopClassHandlerModule,
+  getHangingProtocolModule,
+
+  // Include dynmically computed values such as toolNames not known till instantiation
   getUtilityModule({ servicesManager }) {
     return [
       {
@@ -75,4 +73,6 @@ const dicomSRExtension = {
 };
 
 export default dicomSRExtension;
-export { hydrateStructuredReport };
+
+// Put static exports here so they can be type checked
+export { hydrateStructuredReport, srProtocol };

extensions/cornerstone/src/Viewport/OHIFCornerstoneViewport.tsx

@@ -390,8 +390,9 @@ const OHIFCornerstoneViewport = React.memo(props => {
         initialImageIndex
       );
 
-      storePresentation();
+      // The presentation state will have been stored previously by closing
-
+      // a viewport.  Otherwise, this viewport will be unchanged and the
+      // presentation information will be directly carried over.
       const {
         lutPresentationStore,
         positionPresentationStore,

platform/viewer/src/components/ViewportGrid.tsx

@@ -200,11 +200,12 @@ function ViewerViewportGrid(props) {
         }
 
         updatedViewports.forEach(vp => {
+          vp.viewportOptions ||= {};
           const { orientation, viewportType } = vp.viewportOptions;
           let initialImageOptions;
 
           // For initial imageIndex to hang be careful for the volume viewport
-          if (viewportType === 'stack') {
+          if (viewportType === 'stack' || !viewportType) {
             initialImageOptions = {
               index: imageIndex,
             };
@@ -227,7 +228,7 @@ function ViewerViewportGrid(props) {
             }
           }
 
-          vp.viewportOptions['initialImageOptions'] = initialImageOptions;
+          vp.viewportOptions.initialImageOptions = initialImageOptions;
         });
 
         viewportGridService.setDisplaySetsForViewports(updatedViewports);