fix: prevent black viewport when navigating series with client-created segmentation (#5919)

extensions/default/src/commandsModule.ts

@@ -734,10 +734,11 @@ const commandsModule = ({
         displaySetIndexToShow > -1 && displaySetIndexToShow < currentDisplaySets.length;
         displaySetIndexToShow += direction
       ) {
-        if (
+        const nextDisplaySet = currentDisplaySets[displaySetIndexToShow];
-          !excludeNonImageModalities ||
+        if (nextDisplaySet.madeInClient) {
-          !nonImageModalities.includes(currentDisplaySets[displaySetIndexToShow].Modality)
+          continue;
-        ) {
+        }
+        if (!excludeNonImageModalities || !nonImageModalities.includes(nextDisplaySet.Modality)) {
           break;
         }
       }

tests/SegmentationSeriesNavigation.spec.ts

@@ -0,0 +1,39 @@
+import { test, visitStudy, expect } from './utils';
+import { press } from './utils/keyboardUtils';
+
+test.beforeEach(async ({ page }) => {
+  const studyInstanceUID = '1.2.840.113619.2.290.3.3767434740.226.1600859119.501';
+  const mode = 'segmentation';
+  await visitStudy(page, studyInstanceUID, mode, 2000);
+});
+
+test('should keep the viewport rendered when navigating series with Page Down after adding a segmentation', async ({
+  page,
+  leftPanelPageObject,
+  rightPanelPageObject,
+  viewportPageObject,
+}) => {
+  // Study has 5 series; pressing 8 times verifies navigation remains stable even after
+  // reaching the client-created SEG display set appended by "Add Segmentation".
+  const minimumSeriesExpected = 5;
+  const totalPageDownPresses = minimumSeriesExpected + 3;
+
+  await rightPanelPageObject.labelMapSegmentationPanel.addSegmentationButton.click();
+
+  const thumbnailsLocator = leftPanelPageObject.thumbnails;
+  await expect
+    .poll(async () => {
+      return await thumbnailsLocator.count();
+    })
+    .toBeGreaterThanOrEqual(minimumSeriesExpected);
+
+  const activeViewport = await viewportPageObject.active;
+  await activeViewport.pane.click();
+  await activeViewport.pane.dblclick();
+
+  for (let i = 0; i < totalPageDownPresses; i++) {
+    await press({ page, key: 'PageDown' });
+    const currentActiveViewport = await viewportPageObject.active;
+    await expect(currentActiveViewport.overlayText.bottomRight.instanceNumber).toBeVisible();
+  }
+});