fix(theming): Conitionally disable blur filter for performance

apps/theming/lib/Listener/BeforePreferenceListener.php

@@ -17,6 +17,12 @@
 
 /** @template-implements IEventListener<BeforePreferenceDeletedEvent|BeforePreferenceSetEvent> */
 class BeforePreferenceListener implements IEventListener {
+
+	/**
+	 * @var string[]
+	 */
+	private const ALLOWED_KEYS = ['force_enable_blur_filter', 'shortcuts_disabled', 'primary_color'];
+
 	public function __construct(
 		private IAppManager $appManager,
 	) {
@@ -38,15 +44,16 @@ public function handle(Event $event): void {
 	}
 
 	private function handleThemingValues(BeforePreferenceSetEvent|BeforePreferenceDeletedEvent $event): void {
-		$allowedKeys = ['shortcuts_disabled', 'primary_color'];
-
-		if (!in_array($event->getConfigKey(), $allowedKeys)) {
+		if (!in_array($event->getConfigKey(), self::ALLOWED_KEYS)) {
 			// Not allowed config key
 			return;
 		}
 
 		if ($event instanceof BeforePreferenceSetEvent) {
 			switch ($event->getConfigKey()) {
+				case 'force_enable_blur_filter':
+					$event->setValid($event->getConfigValue() === 'yes' || $event->getConfigValue() === 'no');
+					break;
 				case 'shortcuts_disabled':
 					$event->setValid($event->getConfigValue() === 'yes');
 					break;
@@ -56,6 +63,7 @@ private function handleThemingValues(BeforePreferenceSetEvent|BeforePreferenceDe
 				default:
 					$event->setValid(false);
 			}
+			return;
 		}
 
 		$event->setValid(true);

apps/theming/lib/Settings/Personal.php

@@ -75,6 +75,7 @@ public function getForm(): TemplateResponse {
 		$this->initialStateService->provideInitialState('themes', array_values($themes));
 		$this->initialStateService->provideInitialState('enforceTheme', $enforcedTheme);
 		$this->initialStateService->provideInitialState('isUserThemingDisabled', $this->themingDefaults->isUserThemingDisabled());
+		$this->initialStateService->provideInitialState('enableBlurFilter', $this->config->getUserValue($this->userId, 'theming', 'force_enable_blur_filter', ''));
 		$this->initialStateService->provideInitialState('navigationBar', [
 			'userAppOrder' => json_decode($this->config->getUserValue($this->userId, 'core', 'apporder', '[]'), true, flags:JSON_THROW_ON_ERROR),
 			'enforcedDefaultApp' => $forcedDefaultApp

apps/theming/lib/Themes/DefaultTheme.php

@@ -7,48 +7,35 @@
  */
 namespace OCA\Theming\Themes;
 
+use OC\AppFramework\Http\Request;
 use OCA\Theming\ImageManager;
 use OCA\Theming\ITheme;
 use OCA\Theming\ThemingDefaults;
 use OCA\Theming\Util;
 use OCP\App\IAppManager;
 use OCP\IConfig;
 use OCP\IL10N;
+use OCP\IRequest;
 use OCP\IURLGenerator;
 use OCP\IUserSession;
 
 class DefaultTheme implements ITheme {
 	use CommonThemeTrait;
 
-	public Util $util;
-	public ThemingDefaults $themingDefaults;
-	public IUserSession $userSession;
-	public IURLGenerator $urlGenerator;
-	public ImageManager $imageManager;
-	public IConfig $config;
-	public IL10N $l;
-	public IAppManager $appManager;
-
 	public string $defaultPrimaryColor;
 	public string $primaryColor;
 
-	public function __construct(Util $util,
-		ThemingDefaults $themingDefaults,
-		IUserSession $userSession,
-		IURLGenerator $urlGenerator,
-		ImageManager $imageManager,
-		IConfig $config,
-		IL10N $l,
-		IAppManager $appManager) {
-		$this->util = $util;
-		$this->themingDefaults = $themingDefaults;
-		$this->userSession = $userSession;
-		$this->urlGenerator = $urlGenerator;
-		$this->imageManager = $imageManager;
-		$this->config = $config;
-		$this->l = $l;
-		$this->appManager = $appManager;
-
+	public function __construct(
+		public Util $util,
+		public ThemingDefaults $themingDefaults,
+		public IUserSession $userSession,
+		public IURLGenerator $urlGenerator,
+		public ImageManager $imageManager,
+		public IConfig $config,
+		public IL10N $l,
+		public IAppManager $appManager,
+		private ?IRequest $request,
+	) {
 		$this->defaultPrimaryColor = $this->themingDefaults->getDefaultColorPrimary();
 		$this->primaryColor = $this->themingDefaults->getColorPrimary();
 	}
@@ -96,12 +83,29 @@ public function getCSSVariables(): array {
 		$colorSuccess = '#2d7b41';
 		$colorInfo = '#0071ad';
 
+		$user = $this->userSession->getUser();
+		// Chromium based browsers currently (2024) have huge performance issues with blur filters
+		$isChromium = $this->request !== null && $this->request->isUserAgent([Request::USER_AGENT_CHROME, Request::USER_AGENT_MS_EDGE]);
+		// Ignore MacOS because they always have hardware accelartion
+		$isChromium = $isChromium && !$this->request->isUserAgent(['/Macintosh/']);
+		// Allow to force the blur filter
+		$forceEnableBlur = $user === null ? false : $this->config->getUserValue(
+			$user->getUID(),
+			'theming',
+			'force_enable_blur_filter',
+		);
+		$workingBlur = match($forceEnableBlur) {
+			'yes' => true,
+			'no' => false,
+			default => !$isChromium
+		};
+
 		$variables = [
 			'--color-main-background' => $colorMainBackground,
 			'--color-main-background-rgb' => $colorMainBackgroundRGB,
 			'--color-main-background-translucent' => 'rgba(var(--color-main-background-rgb), .97)',
 			'--color-main-background-blur' => 'rgba(var(--color-main-background-rgb), .8)',
-			'--filter-background-blur' => 'blur(25px)',
+			'--filter-background-blur' => $workingBlur ? 'blur(25px)' : 'none',
 
 			// to use like this: background-image: linear-gradient(0, var('--gradient-main-background));
 			'--gradient-main-background' => 'var(--color-main-background) 0%, var(--color-main-background-translucent) 85%, transparent 100%',

apps/theming/src/UserTheming.vue

@@ -33,6 +33,14 @@
 					type="font"
 					@change="changeFont" />
 			</div>
+
+			<h3>{{ t('theming', 'Misc accessibility options') }}</h3>
+			<NcCheckboxRadioSwitch type="checkbox"
+				:checked="enableBlurFilter === 'yes'"
+				:indeterminate="enableBlurFilter === ''"
+				@update:checked="changeEnableBlurFilter">
+				{{ t('theming', 'Enable blur background filter (may increase GPU load)') }}
+			</NcCheckboxRadioSwitch>
 		</NcSettingsSection>
 
 		<NcSettingsSection :name="t('theming', 'Primary color')"
@@ -86,6 +94,7 @@ import UserPrimaryColor from './components/UserPrimaryColor.vue'
 const availableThemes = loadState('theming', 'themes', [])
 const enforceTheme = loadState('theming', 'enforceTheme', '')
 const shortcutsDisabled = loadState('theming', 'shortcutsDisabled', false)
+const enableBlurFilter = loadState('theming', 'enableBlurFilter', '')
 
 const isUserThemingDisabled = loadState('theming', 'isUserThemingDisabled')
 
@@ -109,6 +118,8 @@ export default {
 			enforceTheme,
 			shortcutsDisabled,
 			isUserThemingDisabled,
+
+			enableBlurFilter,
 		}
 	},
 
@@ -223,6 +234,22 @@ export default {
 			}
 		},
 
+		async changeEnableBlurFilter() {
+			this.enableBlurFilter = this.enableBlurFilter === 'no' ? 'yes' : 'no'
+			await axios({
+				url: generateOcsUrl('apps/provisioning_api/api/v1/config/users/{appId}/{configKey}', {
+					appId: 'theming',
+					configKey: 'force_enable_blur_filter',
+				}),
+				data: {
+					configValue: this.enableBlurFilter,
+				},
+				method: 'POST',
+			})
+			// Refresh the styles
+			this.$emit('update:background')
+		},
+
 		updateBodyAttributes() {
 			const enabledThemesIDs = this.themes.filter(theme => theme.enabled === true).map(theme => theme.id)
 			const enabledFontsIDs = this.fonts.filter(font => font.enabled === true).map(font => font.id)

apps/theming/tests/Service/ThemesServiceTest.php

@@ -315,6 +315,7 @@ private function initThemes() {
 				$this->config,
 				$l10n,
 				$appManager,
+				null,
 			),
 			'light' => new LightTheme(
 				$util,
@@ -325,6 +326,7 @@ private function initThemes() {
 				$this->config,
 				$l10n,
 				$appManager,
+				null,
 			),
 			'dark' => new DarkTheme(
 				$util,
@@ -335,6 +337,7 @@ private function initThemes() {
 				$this->config,
 				$l10n,
 				$appManager,
+				null,
 			),
 			'light-highcontrast' => new HighContrastTheme(
 				$util,
@@ -345,6 +348,7 @@ private function initThemes() {
 				$this->config,
 				$l10n,
 				$appManager,
+				null,
 			),
 			'dark-highcontrast' => new DarkHighContrastTheme(
 				$util,
@@ -355,6 +359,7 @@ private function initThemes() {
 				$this->config,
 				$l10n,
 				$appManager,
+				null,
 			),
 			'opendyslexic' => new DyslexiaFont(
 				$util,
@@ -365,6 +370,7 @@ private function initThemes() {
 				$this->config,
 				$l10n,
 				$appManager,
+				null,
 			),
 		];
 	}

apps/theming/tests/Settings/PersonalTest.php

@@ -26,14 +26,15 @@
 use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\IUserSession;
+use PHPUnit\Framework\MockObject\MockObject;
 use Test\TestCase;
 
 class PersonalTest extends TestCase {
-	private IConfig $config;
-	private ThemesService $themesService;
-	private IInitialState $initialStateService;
-	private ThemingDefaults $themingDefaults;
-	private IAppManager $appManager;
+	private IConfig&MockObject $config;
+	private ThemesService&MockObject $themesService;
+	private IInitialState&MockObject $initialStateService;
+	private ThemingDefaults&MockObject $themingDefaults;
+	private IAppManager&MockObject $appManager;
 	private Personal $admin;
 
 	/** @var ITheme[] */
@@ -106,17 +107,18 @@ public function testGetForm(string $enforcedTheme, $themesState) {
 			->method('getDefaultAppForUser')
 			->willReturn('forcedapp');
 
-		$this->initialStateService->expects($this->exactly(7))
+		$this->initialStateService->expects($this->exactly(8))
 			->method('provideInitialState')
-			->withConsecutive(
+			->willReturnMap([
 				['shippedBackgrounds', BackgroundService::SHIPPED_BACKGROUNDS],
 				['themingDefaults'],
+				['enableBlurFilter', ''],
 				['userBackgroundImage'],
 				['themes', $themesState],
 				['enforceTheme', $enforcedTheme],
 				['isUserThemingDisabled', false],
 				['navigationBar', ['userAppOrder' => [], 'enforcedDefaultApp' => 'forcedapp']],
-			);
+			]);
 
 		$expected = new TemplateResponse('theming', 'settings-personal');
 		$this->assertEquals($expected, $this->admin->getForm());
@@ -158,6 +160,7 @@ private function initThemes() {
 				$config,
 				$l10n,
 				$appManager,
+				null,
 			),
 			'light' => new LightTheme(
 				$util,
@@ -168,6 +171,7 @@ private function initThemes() {
 				$config,
 				$l10n,
 				$appManager,
+				null,
 			),
 			'dark' => new DarkTheme(
 				$util,
@@ -178,6 +182,7 @@ private function initThemes() {
 				$config,
 				$l10n,
 				$appManager,
+				null,
 			),
 			'light-highcontrast' => new HighContrastTheme(
 				$util,
@@ -188,6 +193,7 @@ private function initThemes() {
 				$config,
 				$l10n,
 				$appManager,
+				null,
 			),
 			'dark-highcontrast' => new DarkHighContrastTheme(
 				$util,
@@ -198,6 +204,7 @@ private function initThemes() {
 				$config,
 				$l10n,
 				$appManager,
+				null,
 			),
 			'opendyslexic' => new DyslexiaFont(
 				$util,
@@ -208,6 +215,7 @@ private function initThemes() {
 				$config,
 				$l10n,
 				$appManager,
+				null,
 			),
 		];
 	}

apps/theming/tests/Themes/DarkHighContrastThemeTest.php

@@ -101,6 +101,7 @@ protected function setUp(): void {
 			$this->config,
 			$this->l10n,
 			$this->appManager,
+			null,
 		);
 
 		parent::setUp();

apps/theming/tests/Themes/DarkThemeTest.php

@@ -98,6 +98,7 @@ protected function setUp(): void {
 			$this->config,
 			$this->l10n,
 			$this->appManager,
+			null,
 		);
 
 		parent::setUp();

apps/theming/tests/Themes/DefaultThemeTest.php

@@ -102,6 +102,7 @@ protected function setUp(): void {
 			$this->config,
 			$this->l10n,
 			$this->appManager,
+			null,
 		);
 
 		parent::setUp();

apps/theming/tests/Themes/DyslexiaFontTest.php

@@ -103,6 +103,7 @@ protected function setUp(): void {
 			$this->config,
 			$this->l10n,
 			$this->appManager,
+			null,
 		);
 
 		parent::setUp();

apps/theming/tests/Themes/HighContrastThemeTest.php

@@ -101,6 +101,7 @@ protected function setUp(): void {
 			$this->config,
 			$this->l10n,
 			$this->appManager,
+			null,
 		);
 
 		parent::setUp();