[stable24] Properly calculate primary element based on background luminance

apps/accessibility/lib/Controller/AccessibilityController.php

@@ -219,7 +219,7 @@ private function getInjectedVariables(): string {
 			return $this->injectedVariables;
 		}
 		$variables = '';
-		foreach ($this->defaults->getScssVariables() as $key => $value) {
+		foreach ($this->defaults->getScssVariables(!$this->isDarkThemeEnabled()) as $key => $value) {
 			$variables .= '$' . $key . ': ' . $value . ';';
 		}
 
@@ -238,4 +238,18 @@ private function getInjectedVariables(): string {
 		}
 		return $variables;
 	}
+
+	/**
+	 * Return true if the dark theme is enabled for the current user
+	 */
+	private function isDarkThemeEnabled(): bool {
+		if (!$this->userSession->isLoggedIn()) {
+			return false;
+		}
+		$user = $this->userSession->getUser();
+		if (!$user) {
+			return false;
+		}
+		return $this->config->getUserValue($user->getUID(), $this->appName, 'theme', false) === 'dark';
+	}
 }

apps/theming/lib/ThemingDefaults.php

@@ -315,7 +315,7 @@ public function getFDroidClientUrl() {
 	/**
 	 * @return array scss variables to overwrite
 	 */
-	public function getScssVariables() {
+	public function getScssVariables(bool $brightBackground = true) {
 		$cacheBuster = $this->config->getAppValue('theming', 'cachebuster', '0');
 		$cache = $this->cacheFactory->createDistributed('theming-' . $cacheBuster . '-' . $this->urlGenerator->getBaseUrl());
 		if ($value = $cache->get('getScssVariables')) {
@@ -339,7 +339,7 @@ public function getScssVariables() {
 		if ($this->config->getAppValue('theming', 'color', '') !== '') {
 			$variables['color-primary'] = $this->getColorPrimary();
 			$variables['color-primary-text'] = $this->getTextColorPrimary();
-			$variables['color-primary-element'] = $this->util->elementColor($this->getColorPrimary());
+			$variables['color-primary-element'] = $this->util->elementColor($this->getColorPrimary(), $brightBackground);
 		}
 
 		if ($this->config->getAppValue('theming', 'backgroundMime', '') === 'backgroundColor') {

lib/private/legacy/OC_Defaults.php

@@ -311,9 +311,9 @@ public function getColorPrimary() {
 	/**
 	 * @return array scss variables to overwrite
 	 */
-	public function getScssVariables() {
+	public function getScssVariables(bool $brightBackground = true) {
 		if ($this->themeExist('getScssVariables')) {
-			return $this->theme->getScssVariables();
+			return $this->theme->getScssVariables($brightBackground);
 		}
 		return [];
 	}

themes/example/defaults.php

@@ -119,7 +119,7 @@ public function getColorPrimary() {
 	 * Returns variables to overload defaults from core/css/variables.scss
 	 * @return array
 	 */
-	public function getScssVariables() {
+	public function getScssVariables(bool $brightBackground) {
 		return [
 			'color-primary' => '#745bca'
 		];