custom folding regions

org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/folding/FoldingTest.java

@@ -0,0 +1,11 @@
+package org.eclipse.jdt.ui.tests.folding;
+
+import org.junit.platform.suite.api.SelectClasses;
+import org.junit.platform.suite.api.Suite;
+
+@Suite
+@SelectClasses({
+	CustomFoldingRegionTest.class
+})
+public class FoldingTest {
+}

org.eclipse.jdt.ui/plugin.xml

@@ -1055,6 +1055,17 @@
          <keywordReference id="org.eclipse.jdt.ui.saveparticipant"/>
       </page>
 
+      <page
+            name="%editorFoldingPage"
+            class="org.eclipse.jdt.internal.ui.preferences.FoldingPreferencePage"
+            category="org.eclipse.jdt.ui.propertyPages.JavaEditorPropertyPage"
+            id="org.eclipse.jdt.ui.propertyPages.FoldingPreferencePage">
+         <enabledWhen>
+		     <adapt type="org.eclipse.core.resources.IProject">
+		          <test property="org.eclipse.core.resources.projectNature" value="org.eclipse.jdt.core.javanature"/>
+		     </adapt>
+         </enabledWhen>
+      </page>
       <page
             name="%classpathContainerPageName"
             class="org.eclipse.jdt.internal.ui.preferences.ClasspathContainerPreferencePage"

org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/FoldingConfigurationBlock.java

@@ -35,6 +35,7 @@
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
+import org.eclipse.core.runtime.preferences.IScopeContext;
 
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.layout.PixelConverter;
@@ -46,8 +47,10 @@
 
 import org.eclipse.jdt.internal.corext.util.Messages;
 
+import org.eclipse.jdt.ui.JavaUI;
 import org.eclipse.jdt.ui.PreferenceConstants;
 import org.eclipse.jdt.ui.text.folding.IJavaFoldingPreferenceBlock;
+import org.eclipse.jdt.ui.text.folding.IScopedJavaFoldingPreferenceBlock;
 
 import org.eclipse.jdt.internal.ui.JavaPlugin;
 import org.eclipse.jdt.internal.ui.preferences.OverlayPreferenceStore.OverlayKey;
@@ -61,7 +64,7 @@
  *
  * @since 3.0
  */
-class FoldingConfigurationBlock implements IPreferenceConfigurationBlock {
+class FoldingConfigurationBlock implements IPreferenceAndPropertyConfigurationBlock {
 
 	private static class ErrorPreferences implements IJavaFoldingPreferenceBlock {
 		private String fMessage;
@@ -117,14 +120,20 @@ public void dispose() {
 	private final Map<String, IJavaFoldingPreferenceBlock> fProviderPreferences;
 	private final Map<String, Control> fProviderControls;
 
+	private IScopeContext fContext;
 
-	public FoldingConfigurationBlock(OverlayPreferenceStore store) {
+	private boolean fIsProjectPreferencePage;
+
+
+	public FoldingConfigurationBlock(OverlayPreferenceStore store, IScopeContext context, boolean isProjectPreferencePage) {
 		Assert.isNotNull(store);
 		fStore= store;
 		fStore.addKeys(createOverlayStoreKeys());
 		fProviderDescriptors= createListModel();
 		fProviderPreferences= new HashMap<>();
 		fProviderControls= new HashMap<>();
+		this.fContext= context;
+		this.fIsProjectPreferencePage= isProjectPreferencePage;
 	}
 
 	private Map<String, JavaFoldingStructureProviderDescriptor> createListModel() {
@@ -289,6 +298,14 @@ void updateListDependencies() {
 			if (prefs == null) {
 				try {
 					prefs= desc.createPreferences();
+					if (fIsProjectPreferencePage) {
+						if (prefs instanceof IScopedJavaFoldingPreferenceBlock scopedPrefs) {
+							scopedPrefs.setScopeContext(fContext);
+						} else {
+							String message= Messages.format(PreferencesMessages.FoldingConfigurationBlock_error_project_prefs_not_supported, desc.getName());
+							prefs= new ErrorPreferences(message);
+						}
+					}
 					fProviderPreferences.put(id, prefs);
 				} catch (CoreException e) {
 					JavaPlugin.log(e);
@@ -369,4 +386,19 @@ private void restoreFromPreferences() {
 		else
 			fProviderViewer.setSelection(new StructuredSelection(provider), true);
 	}
+
+	@Override
+	public void disableProjectSettings() {
+		if(fContext != null) {
+			fContext.getNode(JavaUI.ID_PLUGIN).remove(PreferenceConstants.EDITOR_FOLDING_ENABLED);
+		}
+	}
+
+	@Override
+	public void enableProjectSettings() {
+		if(fContext != null) {
+			fContext.getNode(JavaUI.ID_PLUGIN).putBoolean(PreferenceConstants.EDITOR_FOLDING_ENABLED, fStore.getBoolean(PreferenceConstants.EDITOR_FOLDING_ENABLED));
+		}
+
+	}
 }

org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/FoldingPreferencePage.java

@@ -15,53 +15,85 @@
 package org.eclipse.jdt.internal.ui.preferences;
 
 
-import org.eclipse.swt.widgets.Composite;
-import org.eclipse.swt.widgets.Label;
+import org.eclipse.core.runtime.preferences.IScopeContext;
+
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.ProjectScope;
+
+import org.eclipse.ui.preferences.ScopedPreferenceStore;
+
+import org.eclipse.jdt.ui.JavaUI;
 
 import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
 import org.eclipse.jdt.internal.ui.JavaPlugin;
 
 /**
  * The page for setting the editor options.
  */
-public final class FoldingPreferencePage extends AbstractConfigurationBlockPreferencePage {
+public final class FoldingPreferencePage extends AbstractConfigurationBlockPreferenceAndPropertyPage {
+
+	public static final String PROPERTY_PAGE_ID= "org.eclipse.jdt.ui.propertyPages.FoldingPreferencePage"; //$NON-NLS-1$
+	public static final String PREFERENCE_PAGE_ID= "org.eclipse.jdt.ui.preferences.FoldingPreferencePage"; //$NON-NLS-1$
+	private OverlayPreferenceStore fOverlayStore;
+
+
+	public FoldingPreferencePage() {
+		setDescription(PreferencesMessages.JavaEditorPreferencePage_folding_title);
+	}
 
 	/*
-	 * @see org.eclipse.ui.internal.editors.text.AbstractConfigureationBlockPreferencePage#getHelpId()
+	 * @see org.eclipse.jdt.internal.ui.preferences.AbstractConfigurationBlockPreferenceAndPropertyPage#getHelpId()
 	 */
 	@Override
 	protected String getHelpId() {
 		return IJavaHelpContextIds.JAVA_EDITOR_PREFERENCE_PAGE;
 	}
 
-	/*
-	 * @see org.eclipse.ui.internal.editors.text.AbstractConfigurationBlockPreferencePage#setDescription()
-	 */
 	@Override
-	protected void setDescription() {
-		String description= PreferencesMessages.JavaEditorPreferencePage_folding_title;
-		setDescription(description);
+	protected IPreferenceAndPropertyConfigurationBlock createConfigurationBlock(IScopeContext context) {
+		ScopedPreferenceStore scopedStore= new ScopedPreferenceStore(context, JavaUI.ID_PLUGIN);
+		fOverlayStore= new OverlayPreferenceStore(
+				scopedStore,
+				new OverlayPreferenceStore.OverlayKey[] {});
+		FoldingConfigurationBlock foldingConfigurationBlock= new FoldingConfigurationBlock(fOverlayStore, context, isProjectPreferencePage());
+		fOverlayStore.load();
+		fOverlayStore.start();
+		return foldingConfigurationBlock;
 	}
 
-	/*
-	 * @see org.org.eclipse.ui.internal.editors.text.AbstractConfigurationBlockPreferencePage#setPreferenceStore()
-	 */
 	@Override
-	protected void setPreferenceStore() {
-		setPreferenceStore(JavaPlugin.getDefault().getPreferenceStore());
+	protected boolean hasProjectSpecificOptions(IProject project) {
+		return JavaPlugin.getDefault().getFoldingStructureProviderRegistry().hasProjectSpecificOptions(new ProjectScope(project));
 	}
 
+	@Override
+	protected String getPreferencePageID() {
+		return PREFERENCE_PAGE_ID;
+	}
 
 	@Override
-	protected Label createDescriptionLabel(Composite parent) {
-		return null; // no description for new look.
+	protected String getPropertyPageID() {
+		return PROPERTY_PAGE_ID;
 	}
 
-	/*
-	 * @see org.eclipse.ui.internal.editors.text.AbstractConfigureationBlockPreferencePage#createConfigurationBlock(org.eclipse.ui.internal.editors.text.OverlayPreferenceStore)
-	 */
 	@Override
-	protected IPreferenceConfigurationBlock createConfigurationBlock(OverlayPreferenceStore overlayPreferenceStore) {
-		return new FoldingConfigurationBlock(overlayPreferenceStore);
+	public boolean performOk() {
+		boolean result= super.performOk();
+		fOverlayStore.propagate();
+		return result;
 	}
+
+	@Override
+	public void performDefaults() {
+		fOverlayStore.loadDefaults();
+		super.performDefaults();
+
+	}
+
+	@Override
+	public void dispose() {
+		super.dispose();
+		fOverlayStore.stop();
+	}
+
 }

org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/PreferencesMessages.java

@@ -773,6 +773,7 @@ private PreferencesMessages() {
 	public static String FoldingConfigurationBlock_combo_caption;
 	public static String FoldingConfigurationBlock_info_no_preferences;
 	public static String FoldingConfigurationBlock_error_not_exist;
+	public static String FoldingConfigurationBlock_error_project_prefs_not_supported;
 	public static String FoldingConfigurationBlock_warning_providerNotFound_resetToDefault;
 	public static String PropertiesFileEditorPreferencePage_key;
 	public static String PropertiesFileEditorPreferencePage_value;

org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/PreferencesMessages.properties

@@ -892,6 +892,7 @@ FoldingConfigurationBlock_enable= Enable f&olding
 FoldingConfigurationBlock_combo_caption= Select folding to &use:
 FoldingConfigurationBlock_info_no_preferences= The selected folding provider did not provide a preference control
 FoldingConfigurationBlock_error_not_exist= The ''{0}'' folding provider does not exist.
+FoldingConfigurationBlock_error_project_prefs_not_supported=The ''{0}'' folding provider does not support project specific preferences.
 FoldingConfigurationBlock_warning_providerNotFound_resetToDefault= The ''{0}'' folding provider could not be found. Resetting to the default folding provider.
 
 # Properties File Editor