Bug 567563 - [Win32] Eclipse could set dark mode based on os settings.
- Removed the OS check for MAC and GTK platforms.
- Fixed bundle version in project:
org.eclipse.e4.ui.workbench.renderers.swt

Change-Id: I4632f1279b830d71bbb4d153d7f129238652a5b2
Signed-off-by: Niraj Modi <niraj.modi@in.ibm.com>
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.ui/+/191693
Tested-by: Platform Bot <platform-bot@eclipse.org>

bundles/org.eclipse.e4.ui.css.swt.theme/META-INF/MANIFEST.MF

diff --git a/bundles/org.eclipse.e4.ui.css.swt.theme/META-INF/MANIFEST.MF b/bundles/org.eclipse.e4.ui.css.swt.theme/META-INF/MANIFEST.MF
index 32d93a3..346420b 100644
--- a/bundles/org.eclipse.e4.ui.css.swt.theme/META-INF/MANIFEST.MF
+++ b/bundles/org.eclipse.e4.ui.css.swt.theme/META-INF/MANIFEST.MF
@@ -1,7 +1,7 @@
 Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-SymbolicName: org.eclipse.e4.ui.css.swt.theme;singleton:=true
-Bundle-Version: 0.13.0.qualifier
+Bundle-Version: 0.13.100.qualifier
 Bundle-Name: %pluginName
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin

bundles/org.eclipse.e4.ui.css.swt.theme/src/org/eclipse/e4/ui/css/swt/internal/theme/ThemeEngine.java

diff --git a/bundles/org.eclipse.e4.ui.css.swt.theme/src/org/eclipse/e4/ui/css/swt/internal/theme/ThemeEngine.java b/bundles/org.eclipse.e4.ui.css.swt.theme/src/org/eclipse/e4/ui/css/swt/internal/theme/ThemeEngine.java
index 5de36ab..5019d7b 100644
--- a/bundles/org.eclipse.e4.ui.css.swt.theme/src/org/eclipse/e4/ui/css/swt/internal/theme/ThemeEngine.java
+++ b/bundles/org.eclipse.e4.ui.css.swt.theme/src/org/eclipse/e4/ui/css/swt/internal/theme/ThemeEngine.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2010, 2018 Tom Schindl and others.
+ * Copyright (c) 2010, 2022 Tom Schindl and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -609,15 +609,13 @@
 			}
 		}
 
-		// For Mac & GTK, if the system has Dark appearance set and Eclipse is using the
-		// default settings, then start Eclipse in Dark theme.
-
-		// Check that there is a dark theme present
+		/*
+		 * Any Platform: if the system has Dark appearance set and Eclipse is using the
+		 * default settings, then start Eclipse in Dark theme. Check that there is a
+		 * dark theme present.
+		 */
 		boolean hasDarkTheme = getThemes().stream().anyMatch(t -> t.getId().startsWith(E4_DARK_THEME_ID));
-
-		String os = Platform.getOS();
-		String themeToRestore = (Platform.OS_LINUX.equals(os) || Platform.OS_MACOSX.equals(os))
-				&& Display.isSystemDarkTheme() && hasDarkTheme ? E4_DARK_THEME_ID : alternateTheme;
+		String themeToRestore = Display.isSystemDarkTheme() && hasDarkTheme ? E4_DARK_THEME_ID : alternateTheme;
 		if (themeToRestore != null && flag) {
 			setTheme(themeToRestore, false);
 		}