Fix loading preference default for linked editing

Allows for customizing the default preference value with a plugin_customization.ini

Author: travkin79

org.eclipse.lsp4e/src/org/eclipse/lsp4e/operations/linkedediting/LSPLinkedEditingBase.java

@@ -16,6 +16,7 @@
 import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 
+import org.eclipse.core.runtime.preferences.DefaultScope;
 import org.eclipse.core.runtime.preferences.IEclipsePreferences;
 import org.eclipse.core.runtime.preferences.IEclipsePreferences.IPreferenceChangeListener;
 import org.eclipse.core.runtime.preferences.IEclipsePreferences.PreferenceChangeEvent;
@@ -33,14 +34,19 @@
 
 public class LSPLinkedEditingBase implements IPreferenceChangeListener {
 	public static final String LINKED_EDITING_PREFERENCE = "org.eclipse.ui.genericeditor.linkedediting"; //$NON-NLS-1$
+	private static final boolean LINKED_EDITING_ACTIVE_DEFAULT = true;
 
 	private @Nullable CompletableFuture<List<LinkedEditingRanges>> request;
 	protected boolean fEnabled;
 
 	protected void install() {
-		IEclipsePreferences preferences = InstanceScope.INSTANCE.getNode(LanguageServerPlugin.PLUGIN_ID);
-		preferences.addPreferenceChangeListener(this);
-		this.fEnabled = preferences.getBoolean(LINKED_EDITING_PREFERENCE, true);
+		IEclipsePreferences defaultScopePreferences = DefaultScope.INSTANCE.getNode(LanguageServerPlugin.PLUGIN_ID);
+		boolean defaultValue = defaultScopePreferences.getBoolean(LINKED_EDITING_PREFERENCE, LINKED_EDITING_ACTIVE_DEFAULT);
+
+		IEclipsePreferences instanceScopePreferences = InstanceScope.INSTANCE.getNode(LanguageServerPlugin.PLUGIN_ID);
+		instanceScopePreferences.addPreferenceChangeListener(this);
+
+		this.fEnabled = instanceScopePreferences.getBoolean(LINKED_EDITING_PREFERENCE, defaultValue);
 	}
 
 	protected void uninstall() {