Defer rendering for inactive tabs in open mct tabbed view

.cspell.json

@@ -488,6 +488,7 @@
     "blockquotes",
     "Blockquote",
     "Blockquotes",
+    "oger",
     "lcovonly",
     "gcov"
   ],

e2e/tests/functional/plugins/tabs/tabs.e2e.spec.js

@@ -0,0 +1,74 @@
+/*****************************************************************************
+ * Open MCT, Copyright (c) 2014-2023, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT is licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * Open MCT includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+
+const { createDomainObjectWithDefaults } = require('../../../../appActions');
+const { test, expect } = require('../../../../pluginFixtures');
+
+test.describe('Tabs View', () => {
+  test('Renders tabbed elements', async ({ page }) => {
+    await page.goto('./', { waitUntil: 'domcontentloaded' });
+
+    const tabsView = await createDomainObjectWithDefaults(page, {
+      type: 'Tabs View'
+    });
+    const table = await createDomainObjectWithDefaults(page, {
+      type: 'Telemetry Table',
+      parent: tabsView.uuid
+    });
+    await createDomainObjectWithDefaults(page, {
+      type: 'Event Message Generator',
+      parent: table.uuid
+    });
+    const notebook = await createDomainObjectWithDefaults(page, {
+      type: 'Notebook',
+      parent: tabsView.uuid
+    });
+    const sineWaveGenerator = await createDomainObjectWithDefaults(page, {
+      type: 'Sine Wave Generator',
+      parent: tabsView.uuid
+    });
+
+    page.goto(tabsView.url);
+
+    // select first tab
+    await page.getByLabel(`${table.name} tab`).click();
+    // ensure table header visible
+    await expect(page.getByRole('searchbox', { name: 'message filter input' })).toBeVisible();
+
+    // select second tab
+    await page.getByLabel(`${notebook.name} tab`).click();
+
+    // ensure notebook visible
+    await expect(page.locator('.c-notebook__drag-area')).toBeVisible();
+
+    // select third tab
+    await page.getByLabel(`${sineWaveGenerator.name} tab`).click();
+
+    // expect sine wave generator visible
+    expect(await page.locator('.c-plot').isVisible()).toBe(true);
+
+    // now try to select the first tab again
+    await page.getByLabel(`${table.name} tab`).click();
+    // ensure table header visible
+    await expect(page.getByRole('searchbox', { name: 'message filter input' })).toBeVisible();
+  });
+});

e2e/tests/functional/plugins/telemetryTable/telemetryTable.e2e.spec.js

@@ -78,4 +78,85 @@ test.describe('Telemetry Table', () => {
     const endBoundMilliseconds = Date.parse(endDate);
     expect(latestMilliseconds).toBeLessThanOrEqual(endBoundMilliseconds);
   });
+
+  test('Supports filtering telemetry by regular text search', async ({ page }) => {
+    await page.goto('./', { waitUntil: 'domcontentloaded' });
+
+    const table = await createDomainObjectWithDefaults(page, { type: 'Telemetry Table' });
+    await createDomainObjectWithDefaults(page, {
+      type: 'Event Message Generator',
+      parent: table.uuid
+    });
+
+    // focus the Telemetry Table
+    await page.goto(table.url);
+
+    await page.getByRole('searchbox', { name: 'message filter input' }).click();
+    await page.getByRole('searchbox', { name: 'message filter input' }).fill('Roger');
+
+    let cells = await page.getByRole('cell', { name: /Roger/ }).all();
+    // ensure we've got more than one cell
+    expect(cells.length).toBeGreaterThan(1);
+    // ensure the text content of each cell contains the search term
+    for (const cell of cells) {
+      const text = await cell.textContent();
+      expect(text).toContain('Roger');
+    }
+
+    await page.getByRole('searchbox', { name: 'message filter input' }).click();
+    await page.getByRole('searchbox', { name: 'message filter input' }).fill('Dodger');
+
+    cells = await page.getByRole('cell', { name: /Dodger/ }).all();
+    // ensure we've got more than one cell
+    expect(cells.length).toBe(0);
+    // ensure the text content of each cell contains the search term
+    for (const cell of cells) {
+      const text = await cell.textContent();
+      expect(text).not.toContain('Dodger');
+    }
+
+    // Click pause button
+    await page.click('button[title="Pause"]');
+  });
+
+  test('Supports filtering using Regex', async ({ page }) => {
+    await page.goto('./', { waitUntil: 'domcontentloaded' });
+
+    const table = await createDomainObjectWithDefaults(page, { type: 'Telemetry Table' });
+    await createDomainObjectWithDefaults(page, {
+      type: 'Event Message Generator',
+      parent: table.uuid
+    });
+
+    // focus the Telemetry Table
+    page.goto(table.url);
+    await page.getByRole('searchbox', { name: 'message filter input' }).hover();
+    await page.getByLabel('Message filter header').getByRole('button', { name: '/R/' }).click();
+    await page.getByRole('searchbox', { name: 'message filter input' }).click();
+    await page.getByRole('searchbox', { name: 'message filter input' }).fill('/[Rr]oger/');
+
+    let cells = await page.getByRole('cell', { name: /Roger/ }).all();
+    // ensure we've got more than one cell
+    expect(cells.length).toBeGreaterThan(1);
+    // ensure the text content of each cell contains the search term
+    for (const cell of cells) {
+      const text = await cell.textContent();
+      expect(text).toContain('Roger');
+    }
+
+    await page.getByRole('searchbox', { name: 'message filter input' }).click();
+    await page.getByRole('searchbox', { name: 'message filter input' }).fill('/[Dd]oger/');
+
+    cells = await page.getByRole('cell', { name: /Dodger/ }).all();
+    // ensure we've got more than one cell
+    expect(cells.length).toBe(0);
+    // ensure the text content of each cell contains the search term
+    for (const cell of cells) {
+      const text = await cell.textContent();
+      expect(text).not.toContain('Dodger');
+    }
+
+    // Click pause button
+    await page.click('button[title="Pause"]');
+  });
 });

e2e/tests/performance/tabs.e2e.spec.js

@@ -0,0 +1,100 @@
+/*****************************************************************************
+ * Open MCT, Copyright (c) 2014-2023, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT is licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * Open MCT includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+
+const { createDomainObjectWithDefaults, waitForPlotsToRender } = require('../../appActions');
+const { test, expect } = require('../../pluginFixtures');
+
+test.describe('Tabs View', () => {
+  test('Renders tabbed elements nicely', async ({ page }) => {
+    // Code to hook into the requestAnimationFrame function and log each call
+    let animationCalls = [];
+    await page.exposeFunction('logCall', (callCount) => {
+      animationCalls.push(callCount);
+    });
+    await page.addInitScript(() => {
+      const oldRequestAnimationFrame = window.requestAnimationFrame;
+      let callCount = 0;
+      window.requestAnimationFrame = function (callback) {
+        // eslint-disable-next-line no-undef
+        logCall(callCount++);
+        return oldRequestAnimationFrame(callback);
+      };
+    });
+    await page.goto('./', { waitUntil: 'domcontentloaded' });
+
+    const tabsView = await createDomainObjectWithDefaults(page, {
+      type: 'Tabs View'
+    });
+    const table = await createDomainObjectWithDefaults(page, {
+      type: 'Telemetry Table',
+      parent: tabsView.uuid
+    });
+    await createDomainObjectWithDefaults(page, {
+      type: 'Event Message Generator',
+      parent: table.uuid
+    });
+    const notebook = await createDomainObjectWithDefaults(page, {
+      type: 'Notebook',
+      parent: tabsView.uuid
+    });
+    const sineWaveGenerator = await createDomainObjectWithDefaults(page, {
+      type: 'Sine Wave Generator',
+      parent: tabsView.uuid
+    });
+
+    page.goto(tabsView.url);
+
+    // select first tab
+    await page.getByLabel(`${table.name} tab`).click();
+    // ensure table header visible
+    await expect(page.getByRole('searchbox', { name: 'message filter input' })).toBeVisible();
+
+    // select second tab
+    await page.getByLabel(`${notebook.name} tab`).click();
+
+    // expect notebook visible
+    await expect(page.locator('.c-notebook__drag-area')).toBeVisible();
+
+    // select third tab
+    await page.getByLabel(`${sineWaveGenerator.name} tab`).click();
+
+    // ensure sine wave generator visible
+    expect(await page.locator('.c-plot').isVisible()).toBe(true);
+
+    // now select notebook and clear animation calls
+    await page.getByLabel(`${notebook.name} tab`).click();
+    animationCalls = [];
+    // expect notebook visible
+    await expect(page.locator('.c-notebook__drag-area')).toBeVisible();
+    const notebookAnimationCalls = animationCalls.length;
+
+    // select sine wave generator and clear animation calls
+    animationCalls = [];
+    await page.getByLabel(`${sineWaveGenerator.name} tab`).click();
+
+    // ensure sine wave generator visible
+    await waitForPlotsToRender(page);
+    // we should be calling animation frames
+    const sineWaveAnimationCalls = animationCalls.length;
+    expect(sineWaveAnimationCalls).toBeGreaterThanOrEqual(notebookAnimationCalls);
+  });
+});

src/api/nice/NicelyCalled.js

@@ -0,0 +1,88 @@
+/*****************************************************************************
+ * Open MCT, Copyright (c) 2014-2023, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT is licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * Open MCT includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+
+/**
+ * Optimizes `requestAnimationFrame` calls to only execute when the element is visible in the viewport.
+ */
+export default class NicelyCalled {
+  #element;
+  #isIntersecting;
+  #observer;
+  #lastUnfiredFunc;
+
+  /**
+   * Constructs a NicelyCalled instance to manage visibility-based requestAnimationFrame calls.
+   *
+   * @param {HTMLElement} element - The DOM element to observe for visibility changes.
+   * @throws {Error} If element is not provided.
+   */
+  constructor(element) {
+    if (!element) {
+      throw new Error(`Nice visibility must be created with an element`);
+    }
+    this.#element = element;
+    this.#isIntersecting = true;
+
+    this.#observer = new IntersectionObserver(this.#observerCallback);
+    this.#observer.observe(this.#element);
+    this.#lastUnfiredFunc = null;
+  }
+
+  #observerCallback = ([entry]) => {
+    if (entry.target === this.#element) {
+      this.#isIntersecting = entry.isIntersecting;
+      if (this.#isIntersecting && this.#lastUnfiredFunc) {
+        window.requestAnimationFrame(this.#lastUnfiredFunc);
+        this.#lastUnfiredFunc = null;
+      }
+    }
+  };
+
+  /**
+   * Executes a function within requestAnimationFrame if the observed element is visible.
+   * If the element is not visible, the function is stored and called when the element becomes visible.
+   * Note that if called multiple times while not visible, only the last execution is stored and executed.
+   *
+   * @param {Function} func - The function to execute.
+   * @returns {boolean} True if the function was executed immediately, false otherwise.
+   */
+  execute(func) {
+    if (this.#isIntersecting) {
+      window.requestAnimationFrame(func);
+      return true;
+    } else {
+      this.#lastUnfiredFunc = func;
+      return false;
+    }
+  }
+
+  /**
+   * Stops observing the element for visibility changes and cleans up resources to prevent memory leaks.
+   */
+  destroy() {
+    this.#observer.unobserve(this.#element);
+    this.#element = null;
+    this.#isIntersecting = null;
+    this.#observer = null;
+    this.#lastUnfiredFunc = null;
+  }
+}

src/plugins/LADTable/components/LadRow.vue

@@ -22,6 +22,7 @@
 
 <template>
   <tr
+    ref="tableRow"
     class="js-lad-table__body__row c-table__selectable-row"
     @click="clickedRow"
     @contextmenu.prevent="showContextMenu"
@@ -53,6 +54,7 @@ const BLANK_VALUE = '---';
 import identifierToString from '/src/tools/url';
 import PreviewAction from '@/ui/preview/PreviewAction.js';
 
+import NicelyCalled from '../../../api/nice/NicelyCalled';
 import tooltipHelpers from '../../../api/tooltips/tooltipMixins';
 
 export default {
@@ -188,6 +190,7 @@ export default {
     }
   },
   async mounted() {
+    this.nicelyCalled = new NicelyCalled(this.$refs.tableRow);
     this.metadata = this.openmct.telemetry.getMetadata(this.domainObject);
     this.formats = this.openmct.telemetry.getFormatMap(this.metadata);
     this.keyString = this.openmct.objects.makeKeyString(this.domainObject.identifier);
@@ -236,12 +239,12 @@ export default {
     this.previewAction.off('isVisible', this.togglePreviewState);
 
     this.telemetryCollection.destroy();
+    this.nicelyCalled.destroy();
   },
   methods: {
     updateView() {
       if (!this.updatingView) {
-        this.updatingView = true;
-        requestAnimationFrame(() => {
+        this.updatingView = this.nicelyCalled.execute(() => {
           this.timestamp = this.getParsedTimestamp(this.latestDatum);
           this.datum = this.latestDatum;
           this.updatingView = false;