org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/AppearancePreferencePage.java - jdt/eclipse.jdt.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2013 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *     Guven Demir <guven.internet+eclipse@gmail.com> - [package explorer] Alternative package name shortening: abbreviation - https://bugs.eclipse.org/bugs/show_bug.cgi?id=299514
  *******************************************************************************/
 package org.eclipse.jdt.internal.ui.preferences;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Text;

 import org.eclipse.core.runtime.IStatus;

 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.jface.preference.PreferencePage;
 import org.eclipse.jface.resource.JFaceResources;

 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.IWorkbenchPreferencePage;
 import org.eclipse.ui.PlatformUI;

 import org.eclipse.jdt.ui.PreferenceConstants;

 import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
 import org.eclipse.jdt.internal.ui.JavaPlugin;
 import org.eclipse.jdt.internal.ui.dialogs.StatusInfo;
 import org.eclipse.jdt.internal.ui.dialogs.StatusUtil;
 import org.eclipse.jdt.internal.ui.viewsupport.JavaElementLabelComposer;
 import org.eclipse.jdt.internal.ui.wizards.dialogfields.DialogField;
 import org.eclipse.jdt.internal.ui.wizards.dialogfields.IDialogFieldListener;
 import org.eclipse.jdt.internal.ui.wizards.dialogfields.LayoutUtil;
 import org.eclipse.jdt.internal.ui.wizards.dialogfields.SelectionButtonDialogField;
 import org.eclipse.jdt.internal.ui.wizards.dialogfields.Separator;
 import org.eclipse.jdt.internal.ui.wizards.dialogfields.StringDialogField;
 import org.eclipse.jdt.internal.ui.wizards.dialogfields.TextBoxDialogField;


 public class AppearancePreferencePage extends PreferencePage implements IWorkbenchPreferencePage {

 	private static final String SHOW_CU_CHILDREN= PreferenceConstants.SHOW_CU_CHILDREN;
 	private static final String PREF_METHOD_RETURNTYPE= PreferenceConstants.APPEARANCE_METHOD_RETURNTYPE;
 	private static final String PREF_METHOD_TYPEPARAMETERS= PreferenceConstants.APPEARANCE_METHOD_TYPEPARAMETERS;
 	private static final String PREF_COMPRESS_PACKAGE_NAMES= PreferenceConstants.APPEARANCE_COMPRESS_PACKAGE_NAMES;
 	private static final String PREF_ABBREVIATE_PACKAGE_NAMES= PreferenceConstants.APPEARANCE_ABBREVIATE_PACKAGE_NAMES;
 	private static final String PREF_PKG_NAME_PATTERN_FOR_PKG_VIEW= PreferenceConstants.APPEARANCE_PKG_NAME_PATTERN_FOR_PKG_VIEW;
 	private static final String PREF_PKG_NAME_ABBREVIATION_PATTERN_FOR_PKG_VIEW= PreferenceConstants.APPEARANCE_PKG_NAME_ABBREVIATION_PATTERN_FOR_PKG_VIEW;
 	private static final String STACK_BROWSING_VIEWS_VERTICALLY= PreferenceConstants.BROWSING_STACK_VERTICALLY;
 	private static final String PREF_FOLD_PACKAGES_IN_PACKAGE_EXPLORER= PreferenceConstants.APPEARANCE_FOLD_PACKAGES_IN_PACKAGE_EXPLORER;
 	private static final String PREF_SORT_LIBRARY_ENTRIES_BY_NAME= PreferenceConstants.APPEARANCE_SORT_LIBRARY_ENTRIES_BY_NAME;
 	private static final String PREF_CATEGORY= PreferenceConstants.APPEARANCE_CATEGORY;
 	private static final String DECORATE_TEST_CODE_CONTAINER_ICONS= PreferenceConstants.DECORATE_TEST_CODE_CONTAINER_ICONS;

 	private SelectionButtonDialogField fShowMethodReturnType;
 	private SelectionButtonDialogField fShowCategory;
 	private SelectionButtonDialogField fCompressPackageNames;
 	private SelectionButtonDialogField fAbbreviatePackageNames;
 	private SelectionButtonDialogField fStackBrowsingViewsVertically;
 	private SelectionButtonDialogField fShowMembersInPackageView;
 	private SelectionButtonDialogField fDecorateTestCodeContainerIcons;
 	private StringDialogField fPackageNamePattern;
 	private StringDialogField fAbbreviatePackageNamePattern;
 	private SelectionButtonDialogField fFoldPackagesInPackageExplorer;
 	private SelectionButtonDialogField fShowMethodTypeParameters;
 	private SelectionButtonDialogField fSortLibraryEntriesByName;

 	public AppearancePreferencePage() {
 		setPreferenceStore(JavaPlugin.getDefault().getPreferenceStore());
 		setDescription(PreferencesMessages.AppearancePreferencePage_description);

 		IDialogFieldListener listener= this::doDialogFieldChanged;

 		fShowMethodReturnType= new SelectionButtonDialogField(SWT.CHECK);
 		fShowMethodReturnType.setDialogFieldListener(listener);
 		fShowMethodReturnType.setLabelText(PreferencesMessages.AppearancePreferencePage_methodreturntype_label);

 		fShowMethodTypeParameters= new SelectionButtonDialogField(SWT.CHECK);
 		fShowMethodTypeParameters.setDialogFieldListener(listener);
 		fShowMethodTypeParameters.setLabelText(PreferencesMessages.AppearancePreferencePage_methodtypeparams_label);

 		fShowCategory= new SelectionButtonDialogField(SWT.CHECK);
 		fShowCategory.setDialogFieldListener(listener);
 		fShowCategory.setLabelText(PreferencesMessages.AppearancePreferencePage_showCategory_label);

 		fShowMembersInPackageView= new SelectionButtonDialogField(SWT.CHECK);
 		fShowMembersInPackageView.setDialogFieldListener(listener);
 		fShowMembersInPackageView.setLabelText(PreferencesMessages.AppearancePreferencePage_showMembersInPackagesView);

 		fDecorateTestCodeContainerIcons= new SelectionButtonDialogField(SWT.CHECK);
 		fDecorateTestCodeContainerIcons.setDialogFieldListener(listener);
 		fDecorateTestCodeContainerIcons.setLabelText(PreferencesMessages.AppearancePreferencePage_decorateTestCodeContainerIcons);

 		fStackBrowsingViewsVertically= new SelectionButtonDialogField(SWT.CHECK);
 		fStackBrowsingViewsVertically.setDialogFieldListener(listener);
 		fStackBrowsingViewsVertically.setLabelText(PreferencesMessages.AppearancePreferencePage_stackViewsVerticallyInTheJavaBrowsingPerspective);

 		fFoldPackagesInPackageExplorer= new SelectionButtonDialogField(SWT.CHECK);
 		fFoldPackagesInPackageExplorer.setDialogFieldListener(listener);
 		fFoldPackagesInPackageExplorer.setLabelText(PreferencesMessages.AppearancePreferencePage_foldEmptyPackages);

 		fSortLibraryEntriesByName= new SelectionButtonDialogField(SWT.CHECK);
 		fSortLibraryEntriesByName.setDialogFieldListener(listener);
 		fSortLibraryEntriesByName.setLabelText(PreferencesMessages.AppearancePreferencePage_sortLibraryEntries);

 		fCompressPackageNames= new SelectionButtonDialogField(SWT.CHECK);
 		fCompressPackageNames.setDialogFieldListener(listener);
 		fCompressPackageNames.setLabelText(PreferencesMessages.AppearancePreferencePage_pkgNamePatternEnable_label);

 		fPackageNamePattern= new StringDialogField();
 		fPackageNamePattern.setDialogFieldListener(listener);
 		fPackageNamePattern.setLabelText(PreferencesMessages.AppearancePreferencePage_pkgNamePattern_label);

 		fAbbreviatePackageNames= new SelectionButtonDialogField(SWT.CHECK);
 		fAbbreviatePackageNames.setDialogFieldListener(listener);
 		fAbbreviatePackageNames.setLabelText(PreferencesMessages.AppearancePreferencePage_pkgNamePatternAbbreviateEnable_label);

 		fAbbreviatePackageNamePattern= new TextBoxDialogField();
 		fAbbreviatePackageNamePattern.setDialogFieldListener(listener);
 		fAbbreviatePackageNamePattern.setLabelText(PreferencesMessages.AppearancePreferencePage_pkgNamePatternAbbreviate_label);
 	}

 	private void initFields() {
 		IPreferenceStore prefs= getPreferenceStore();
 		fShowMethodReturnType.setSelection(prefs.getBoolean(PREF_METHOD_RETURNTYPE));
 		fShowMethodTypeParameters.setSelection(prefs.getBoolean(PREF_METHOD_TYPEPARAMETERS));
 		fShowMembersInPackageView.setSelection(prefs.getBoolean(SHOW_CU_CHILDREN));
 		fDecorateTestCodeContainerIcons.setSelection(prefs.getBoolean(DECORATE_TEST_CODE_CONTAINER_ICONS));
 		fShowCategory.setSelection(prefs.getBoolean(PREF_CATEGORY));
 		fStackBrowsingViewsVertically.setSelection(prefs.getBoolean(STACK_BROWSING_VIEWS_VERTICALLY));
 		fPackageNamePattern.setText(prefs.getString(PREF_PKG_NAME_PATTERN_FOR_PKG_VIEW));
 		fCompressPackageNames.setSelection(prefs.getBoolean(PREF_COMPRESS_PACKAGE_NAMES));
 		fPackageNamePattern.setEnabled(fCompressPackageNames.isSelected());
 		fAbbreviatePackageNamePattern.setText(prefs.getString(PREF_PKG_NAME_ABBREVIATION_PATTERN_FOR_PKG_VIEW));
 		fAbbreviatePackageNames.setSelection(prefs.getBoolean(PREF_ABBREVIATE_PACKAGE_NAMES));
 		doDialogFieldChanged(fAbbreviatePackageNames);
 		fAbbreviatePackageNamePattern.setEnabled(fAbbreviatePackageNames.isSelected());
 		fFoldPackagesInPackageExplorer.setSelection(prefs.getBoolean(PREF_FOLD_PACKAGES_IN_PACKAGE_EXPLORER));
 		fSortLibraryEntriesByName.setSelection(prefs.getBoolean(PREF_SORT_LIBRARY_ENTRIES_BY_NAME));
 	}

 	/*
 	 * @see PreferencePage#createControl(Composite)
 	 */
 	@Override
 	public void createControl(Composite parent) {
 		super.createControl(parent);
 		PlatformUI.getWorkbench().getHelpSystem().setHelp(getControl(), IJavaHelpContextIds.APPEARANCE_PREFERENCE_PAGE);
 	}

 	/*
 	 * @see PreferencePage#createContents(Composite)
 	 */
 	@Override
 	protected Control createContents(Composite parent) {
 		initializeDialogUnits(parent);
 		int nColumns= 1;

 		Composite result= new Composite(parent, SWT.NONE);
 		result.setFont(parent.getFont());

 		GridLayout layout= new GridLayout();
 		layout.marginHeight= convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
 		layout.marginWidth= 0;
 		layout.numColumns= nColumns;
 		result.setLayout(layout);

 		fShowMethodReturnType.doFillIntoGrid(result, nColumns);
 		fShowMethodTypeParameters.doFillIntoGrid(result, nColumns);
 		fShowCategory.doFillIntoGrid(result, nColumns);
 		fShowMembersInPackageView.doFillIntoGrid(result, nColumns);
 		fFoldPackagesInPackageExplorer.doFillIntoGrid(result, nColumns);
 		fDecorateTestCodeContainerIcons.doFillIntoGrid(result, nColumns);
 		fSortLibraryEntriesByName.doFillIntoGrid(result, nColumns);

 		new Separator().doFillIntoGrid(result, nColumns);

 		fCompressPackageNames.doFillIntoGrid(result, nColumns);
 		fPackageNamePattern.doFillIntoGrid(result, 2);
 		LayoutUtil.setHorizontalIndent(fPackageNamePattern.getLabelControl(null));
 		Text packageNamePatternControl= fPackageNamePattern.getTextControl(null);
 		LayoutUtil.setHorizontalIndent(packageNamePatternControl);
 		LayoutUtil.setHorizontalGrabbing(packageNamePatternControl);
 		LayoutUtil.setWidthHint(fPackageNamePattern.getLabelControl(null), convertWidthInCharsToPixels(65));

 		new Separator().doFillIntoGrid(result, nColumns);
 		fAbbreviatePackageNames.doFillIntoGrid(result, nColumns);
 		fAbbreviatePackageNamePattern.doFillIntoGrid(result, 2);
 		LayoutUtil.setHorizontalIndent(fAbbreviatePackageNamePattern.getLabelControl(null));
 		Text abbreviatePackageNamePatternControl= fAbbreviatePackageNamePattern.getTextControl(null);
 		LayoutUtil.setHorizontalIndent(abbreviatePackageNamePatternControl);
 		LayoutUtil.setHorizontalGrabbing(abbreviatePackageNamePatternControl);
 		LayoutUtil.setWidthHint(fAbbreviatePackageNamePattern.getLabelControl(null), convertWidthInCharsToPixels(65));
 		LayoutUtil.setVerticalGrabbing(abbreviatePackageNamePatternControl);
 		LayoutUtil.setHeightHint(abbreviatePackageNamePatternControl, convertHeightInCharsToPixels(3));

 		new Separator().doFillIntoGrid(result, nColumns);
 		fStackBrowsingViewsVertically.doFillIntoGrid(result, nColumns);

 		String noteTitle= PreferencesMessages.AppearancePreferencePage_note;
 		String noteMessage= PreferencesMessages.AppearancePreferencePage_preferenceOnlyEffectiveForNewPerspectives;
 		Composite noteControl= createNoteComposite(JFaceResources.getDialogFont(), result, noteTitle, noteMessage);
 		GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		gd.horizontalSpan= 2;
 		gd.horizontalIndent= LayoutUtil.getIndent();
 		noteControl.setLayoutData(gd);

 		initFields();

 		Dialog.applyDialogFont(result);
 		return result;
 	}

 	private void doDialogFieldChanged(DialogField field) {
 		if (field == fCompressPackageNames)
 			fPackageNamePattern.setEnabled(fCompressPackageNames.isSelected());

 		if (field == fAbbreviatePackageNames)
 			fAbbreviatePackageNamePattern.setEnabled(fAbbreviatePackageNames.isSelected());

 		updateStatus(getValidationStatus());
 	}

 	private IStatus getValidationStatus() {
 		if (fAbbreviatePackageNames.isSelected()
 				&& JavaElementLabelComposer.parseAbbreviationPattern(fAbbreviatePackageNamePattern.getText()) == null) {
 			return new StatusInfo(IStatus.ERROR, PreferencesMessages.AppearancePreferencePage_packageNameAbbreviationPattern_error_isInvalid);
 		}

 		if (fCompressPackageNames.isSelected() && fPackageNamePattern.getText().isEmpty())
 			return new StatusInfo(IStatus.ERROR, PreferencesMessages.AppearancePreferencePage_packageNameCompressionPattern_error_isEmpty);

 		return new StatusInfo();
 	}

 	private void updateStatus(IStatus status) {
 		setValid(!status.matches(IStatus.ERROR));
 		StatusUtil.applyToStatusLine(this, status);
 	}

 	/*
 	 * @see IWorkbenchPreferencePage#init(IWorkbench)
 	 */
 	@Override
 	public void init(IWorkbench workbench) {
 	}

 	/*
 	 * @see IPreferencePage#performOk()
 	 */
 	@Override
 	public boolean performOk() {
 		IPreferenceStore prefs= getPreferenceStore();
 		prefs.setValue(PREF_METHOD_RETURNTYPE, fShowMethodReturnType.isSelected());
 		prefs.setValue(PREF_METHOD_TYPEPARAMETERS, fShowMethodTypeParameters.isSelected());
 		prefs.setValue(PREF_CATEGORY, fShowCategory.isSelected());
 		prefs.setValue(SHOW_CU_CHILDREN, fShowMembersInPackageView.isSelected());
 		prefs.setValue(DECORATE_TEST_CODE_CONTAINER_ICONS, fDecorateTestCodeContainerIcons.isSelected());
 		prefs.setValue(STACK_BROWSING_VIEWS_VERTICALLY, fStackBrowsingViewsVertically.isSelected());
 		prefs.setValue(PREF_PKG_NAME_PATTERN_FOR_PKG_VIEW, fPackageNamePattern.getText());
 		prefs.setValue(PREF_COMPRESS_PACKAGE_NAMES, fCompressPackageNames.isSelected());
 		prefs.setValue(PREF_PKG_NAME_ABBREVIATION_PATTERN_FOR_PKG_VIEW, fAbbreviatePackageNamePattern.getText());
 		prefs.setValue(PREF_ABBREVIATE_PACKAGE_NAMES, fAbbreviatePackageNames.isSelected());
 		prefs.setValue(PREF_FOLD_PACKAGES_IN_PACKAGE_EXPLORER, fFoldPackagesInPackageExplorer.isSelected());
 		prefs.setValue(PREF_SORT_LIBRARY_ENTRIES_BY_NAME, fSortLibraryEntriesByName.isSelected());
 		JavaPlugin.flushInstanceScope();
 		return super.performOk();
 	}

 	/*
 	 * @see PreferencePage#performDefaults()
 	 */
 	@Override
 	protected void performDefaults() {
 		IPreferenceStore prefs= getPreferenceStore();
 		fShowMethodReturnType.setSelection(prefs.getDefaultBoolean(PREF_METHOD_RETURNTYPE));
 		fShowMethodTypeParameters.setSelection(prefs.getDefaultBoolean(PREF_METHOD_TYPEPARAMETERS));
 		fShowCategory.setSelection(prefs.getDefaultBoolean(PREF_CATEGORY));
 		fShowMembersInPackageView.setSelection(prefs.getDefaultBoolean(SHOW_CU_CHILDREN));
 		fDecorateTestCodeContainerIcons.setSelection(prefs.getDefaultBoolean(DECORATE_TEST_CODE_CONTAINER_ICONS));
 		fStackBrowsingViewsVertically.setSelection(prefs.getDefaultBoolean(STACK_BROWSING_VIEWS_VERTICALLY));
 		fPackageNamePattern.setText(prefs.getDefaultString(PREF_PKG_NAME_PATTERN_FOR_PKG_VIEW));
 		fCompressPackageNames.setSelection(prefs.getDefaultBoolean(PREF_COMPRESS_PACKAGE_NAMES));
 		fAbbreviatePackageNamePattern.setText(prefs.getDefaultString(PREF_PKG_NAME_ABBREVIATION_PATTERN_FOR_PKG_VIEW));
 		fAbbreviatePackageNames.setSelection(prefs.getDefaultBoolean(PREF_ABBREVIATE_PACKAGE_NAMES));
 		fFoldPackagesInPackageExplorer.setSelection(prefs.getDefaultBoolean(PREF_FOLD_PACKAGES_IN_PACKAGE_EXPLORER));
 		fSortLibraryEntriesByName.setSelection(prefs.getDefaultBoolean(PREF_SORT_LIBRARY_ENTRIES_BY_NAME));
 		super.performDefaults();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2013 IBM Corporation and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	* Guven Demir <guven.internet+eclipse@gmail.com> - [package explorer] Alternative package name shortening: abbreviation - https://bugs.eclipse.org/bugs/show_bug.cgi?id=299514
	*******************************************************************************/
	package org.eclipse.jdt.internal.ui.preferences;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Text;

	import org.eclipse.core.runtime.IStatus;

	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.preference.IPreferenceStore;
	import org.eclipse.jface.preference.PreferencePage;
	import org.eclipse.jface.resource.JFaceResources;

	import org.eclipse.ui.IWorkbench;
	import org.eclipse.ui.IWorkbenchPreferencePage;
	import org.eclipse.ui.PlatformUI;

	import org.eclipse.jdt.ui.PreferenceConstants;

	import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
	import org.eclipse.jdt.internal.ui.JavaPlugin;
	import org.eclipse.jdt.internal.ui.dialogs.StatusInfo;
	import org.eclipse.jdt.internal.ui.dialogs.StatusUtil;
	import org.eclipse.jdt.internal.ui.viewsupport.JavaElementLabelComposer;
	import org.eclipse.jdt.internal.ui.wizards.dialogfields.DialogField;
	import org.eclipse.jdt.internal.ui.wizards.dialogfields.IDialogFieldListener;
	import org.eclipse.jdt.internal.ui.wizards.dialogfields.LayoutUtil;
	import org.eclipse.jdt.internal.ui.wizards.dialogfields.SelectionButtonDialogField;
	import org.eclipse.jdt.internal.ui.wizards.dialogfields.Separator;
	import org.eclipse.jdt.internal.ui.wizards.dialogfields.StringDialogField;
	import org.eclipse.jdt.internal.ui.wizards.dialogfields.TextBoxDialogField;


	public class AppearancePreferencePage extends PreferencePage implements IWorkbenchPreferencePage {

	private static final String SHOW_CU_CHILDREN= PreferenceConstants.SHOW_CU_CHILDREN;
	private static final String PREF_METHOD_RETURNTYPE= PreferenceConstants.APPEARANCE_METHOD_RETURNTYPE;
	private static final String PREF_METHOD_TYPEPARAMETERS= PreferenceConstants.APPEARANCE_METHOD_TYPEPARAMETERS;
	private static final String PREF_COMPRESS_PACKAGE_NAMES= PreferenceConstants.APPEARANCE_COMPRESS_PACKAGE_NAMES;
	private static final String PREF_ABBREVIATE_PACKAGE_NAMES= PreferenceConstants.APPEARANCE_ABBREVIATE_PACKAGE_NAMES;
	private static final String PREF_PKG_NAME_PATTERN_FOR_PKG_VIEW= PreferenceConstants.APPEARANCE_PKG_NAME_PATTERN_FOR_PKG_VIEW;
	private static final String PREF_PKG_NAME_ABBREVIATION_PATTERN_FOR_PKG_VIEW= PreferenceConstants.APPEARANCE_PKG_NAME_ABBREVIATION_PATTERN_FOR_PKG_VIEW;
	private static final String STACK_BROWSING_VIEWS_VERTICALLY= PreferenceConstants.BROWSING_STACK_VERTICALLY;
	private static final String PREF_FOLD_PACKAGES_IN_PACKAGE_EXPLORER= PreferenceConstants.APPEARANCE_FOLD_PACKAGES_IN_PACKAGE_EXPLORER;
	private static final String PREF_SORT_LIBRARY_ENTRIES_BY_NAME= PreferenceConstants.APPEARANCE_SORT_LIBRARY_ENTRIES_BY_NAME;
	private static final String PREF_CATEGORY= PreferenceConstants.APPEARANCE_CATEGORY;
	private static final String DECORATE_TEST_CODE_CONTAINER_ICONS= PreferenceConstants.DECORATE_TEST_CODE_CONTAINER_ICONS;

	private SelectionButtonDialogField fShowMethodReturnType;
	private SelectionButtonDialogField fShowCategory;
	private SelectionButtonDialogField fCompressPackageNames;
	private SelectionButtonDialogField fAbbreviatePackageNames;
	private SelectionButtonDialogField fStackBrowsingViewsVertically;
	private SelectionButtonDialogField fShowMembersInPackageView;
	private SelectionButtonDialogField fDecorateTestCodeContainerIcons;
	private StringDialogField fPackageNamePattern;
	private StringDialogField fAbbreviatePackageNamePattern;
	private SelectionButtonDialogField fFoldPackagesInPackageExplorer;
	private SelectionButtonDialogField fShowMethodTypeParameters;
	private SelectionButtonDialogField fSortLibraryEntriesByName;

	public AppearancePreferencePage() {
	setPreferenceStore(JavaPlugin.getDefault().getPreferenceStore());
	setDescription(PreferencesMessages.AppearancePreferencePage_description);

	IDialogFieldListener listener= this::doDialogFieldChanged;

	fShowMethodReturnType= new SelectionButtonDialogField(SWT.CHECK);
	fShowMethodReturnType.setDialogFieldListener(listener);
	fShowMethodReturnType.setLabelText(PreferencesMessages.AppearancePreferencePage_methodreturntype_label);

	fShowMethodTypeParameters= new SelectionButtonDialogField(SWT.CHECK);
	fShowMethodTypeParameters.setDialogFieldListener(listener);
	fShowMethodTypeParameters.setLabelText(PreferencesMessages.AppearancePreferencePage_methodtypeparams_label);

	fShowCategory= new SelectionButtonDialogField(SWT.CHECK);
	fShowCategory.setDialogFieldListener(listener);
	fShowCategory.setLabelText(PreferencesMessages.AppearancePreferencePage_showCategory_label);

	fShowMembersInPackageView= new SelectionButtonDialogField(SWT.CHECK);
	fShowMembersInPackageView.setDialogFieldListener(listener);
	fShowMembersInPackageView.setLabelText(PreferencesMessages.AppearancePreferencePage_showMembersInPackagesView);

	fDecorateTestCodeContainerIcons= new SelectionButtonDialogField(SWT.CHECK);
	fDecorateTestCodeContainerIcons.setDialogFieldListener(listener);
	fDecorateTestCodeContainerIcons.setLabelText(PreferencesMessages.AppearancePreferencePage_decorateTestCodeContainerIcons);

	fStackBrowsingViewsVertically= new SelectionButtonDialogField(SWT.CHECK);
	fStackBrowsingViewsVertically.setDialogFieldListener(listener);
	fStackBrowsingViewsVertically.setLabelText(PreferencesMessages.AppearancePreferencePage_stackViewsVerticallyInTheJavaBrowsingPerspective);

	fFoldPackagesInPackageExplorer= new SelectionButtonDialogField(SWT.CHECK);
	fFoldPackagesInPackageExplorer.setDialogFieldListener(listener);
	fFoldPackagesInPackageExplorer.setLabelText(PreferencesMessages.AppearancePreferencePage_foldEmptyPackages);

	fSortLibraryEntriesByName= new SelectionButtonDialogField(SWT.CHECK);
	fSortLibraryEntriesByName.setDialogFieldListener(listener);
	fSortLibraryEntriesByName.setLabelText(PreferencesMessages.AppearancePreferencePage_sortLibraryEntries);

	fCompressPackageNames= new SelectionButtonDialogField(SWT.CHECK);
	fCompressPackageNames.setDialogFieldListener(listener);
	fCompressPackageNames.setLabelText(PreferencesMessages.AppearancePreferencePage_pkgNamePatternEnable_label);

	fPackageNamePattern= new StringDialogField();
	fPackageNamePattern.setDialogFieldListener(listener);
	fPackageNamePattern.setLabelText(PreferencesMessages.AppearancePreferencePage_pkgNamePattern_label);

	fAbbreviatePackageNames= new SelectionButtonDialogField(SWT.CHECK);
	fAbbreviatePackageNames.setDialogFieldListener(listener);
	fAbbreviatePackageNames.setLabelText(PreferencesMessages.AppearancePreferencePage_pkgNamePatternAbbreviateEnable_label);

	fAbbreviatePackageNamePattern= new TextBoxDialogField();
	fAbbreviatePackageNamePattern.setDialogFieldListener(listener);
	fAbbreviatePackageNamePattern.setLabelText(PreferencesMessages.AppearancePreferencePage_pkgNamePatternAbbreviate_label);
	}

	private void initFields() {
	IPreferenceStore prefs= getPreferenceStore();
	fShowMethodReturnType.setSelection(prefs.getBoolean(PREF_METHOD_RETURNTYPE));
	fShowMethodTypeParameters.setSelection(prefs.getBoolean(PREF_METHOD_TYPEPARAMETERS));
	fShowMembersInPackageView.setSelection(prefs.getBoolean(SHOW_CU_CHILDREN));
	fDecorateTestCodeContainerIcons.setSelection(prefs.getBoolean(DECORATE_TEST_CODE_CONTAINER_ICONS));
	fShowCategory.setSelection(prefs.getBoolean(PREF_CATEGORY));
	fStackBrowsingViewsVertically.setSelection(prefs.getBoolean(STACK_BROWSING_VIEWS_VERTICALLY));
	fPackageNamePattern.setText(prefs.getString(PREF_PKG_NAME_PATTERN_FOR_PKG_VIEW));
	fCompressPackageNames.setSelection(prefs.getBoolean(PREF_COMPRESS_PACKAGE_NAMES));
	fPackageNamePattern.setEnabled(fCompressPackageNames.isSelected());
	fAbbreviatePackageNamePattern.setText(prefs.getString(PREF_PKG_NAME_ABBREVIATION_PATTERN_FOR_PKG_VIEW));
	fAbbreviatePackageNames.setSelection(prefs.getBoolean(PREF_ABBREVIATE_PACKAGE_NAMES));
	doDialogFieldChanged(fAbbreviatePackageNames);
	fAbbreviatePackageNamePattern.setEnabled(fAbbreviatePackageNames.isSelected());
	fFoldPackagesInPackageExplorer.setSelection(prefs.getBoolean(PREF_FOLD_PACKAGES_IN_PACKAGE_EXPLORER));
	fSortLibraryEntriesByName.setSelection(prefs.getBoolean(PREF_SORT_LIBRARY_ENTRIES_BY_NAME));
	}

	/*
	* @see PreferencePage#createControl(Composite)
	*/
	@Override
	public void createControl(Composite parent) {
	super.createControl(parent);
	PlatformUI.getWorkbench().getHelpSystem().setHelp(getControl(), IJavaHelpContextIds.APPEARANCE_PREFERENCE_PAGE);
	}

	/*
	* @see PreferencePage#createContents(Composite)
	*/
	@Override
	protected Control createContents(Composite parent) {
	initializeDialogUnits(parent);
	int nColumns= 1;

	Composite result= new Composite(parent, SWT.NONE);
	result.setFont(parent.getFont());

	GridLayout layout= new GridLayout();
	layout.marginHeight= convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
	layout.marginWidth= 0;
	layout.numColumns= nColumns;
	result.setLayout(layout);

	fShowMethodReturnType.doFillIntoGrid(result, nColumns);
	fShowMethodTypeParameters.doFillIntoGrid(result, nColumns);
	fShowCategory.doFillIntoGrid(result, nColumns);
	fShowMembersInPackageView.doFillIntoGrid(result, nColumns);
	fFoldPackagesInPackageExplorer.doFillIntoGrid(result, nColumns);
	fDecorateTestCodeContainerIcons.doFillIntoGrid(result, nColumns);
	fSortLibraryEntriesByName.doFillIntoGrid(result, nColumns);

	new Separator().doFillIntoGrid(result, nColumns);

	fCompressPackageNames.doFillIntoGrid(result, nColumns);
	fPackageNamePattern.doFillIntoGrid(result, 2);
	LayoutUtil.setHorizontalIndent(fPackageNamePattern.getLabelControl(null));
	Text packageNamePatternControl= fPackageNamePattern.getTextControl(null);
	LayoutUtil.setHorizontalIndent(packageNamePatternControl);
	LayoutUtil.setHorizontalGrabbing(packageNamePatternControl);
	LayoutUtil.setWidthHint(fPackageNamePattern.getLabelControl(null), convertWidthInCharsToPixels(65));

	new Separator().doFillIntoGrid(result, nColumns);
	fAbbreviatePackageNames.doFillIntoGrid(result, nColumns);
	fAbbreviatePackageNamePattern.doFillIntoGrid(result, 2);
	LayoutUtil.setHorizontalIndent(fAbbreviatePackageNamePattern.getLabelControl(null));
	Text abbreviatePackageNamePatternControl= fAbbreviatePackageNamePattern.getTextControl(null);
	LayoutUtil.setHorizontalIndent(abbreviatePackageNamePatternControl);
	LayoutUtil.setHorizontalGrabbing(abbreviatePackageNamePatternControl);
	LayoutUtil.setWidthHint(fAbbreviatePackageNamePattern.getLabelControl(null), convertWidthInCharsToPixels(65));
	LayoutUtil.setVerticalGrabbing(abbreviatePackageNamePatternControl);
	LayoutUtil.setHeightHint(abbreviatePackageNamePatternControl, convertHeightInCharsToPixels(3));

	new Separator().doFillIntoGrid(result, nColumns);
	fStackBrowsingViewsVertically.doFillIntoGrid(result, nColumns);

	String noteTitle= PreferencesMessages.AppearancePreferencePage_note;
	String noteMessage= PreferencesMessages.AppearancePreferencePage_preferenceOnlyEffectiveForNewPerspectives;
	Composite noteControl= createNoteComposite(JFaceResources.getDialogFont(), result, noteTitle, noteMessage);
	GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	gd.horizontalSpan= 2;
	gd.horizontalIndent= LayoutUtil.getIndent();
	noteControl.setLayoutData(gd);

	initFields();

	Dialog.applyDialogFont(result);
	return result;
	}

	private void doDialogFieldChanged(DialogField field) {
	if (field == fCompressPackageNames)
	fPackageNamePattern.setEnabled(fCompressPackageNames.isSelected());

	if (field == fAbbreviatePackageNames)
	fAbbreviatePackageNamePattern.setEnabled(fAbbreviatePackageNames.isSelected());

	updateStatus(getValidationStatus());
	}

	private IStatus getValidationStatus() {
	if (fAbbreviatePackageNames.isSelected()
	&& JavaElementLabelComposer.parseAbbreviationPattern(fAbbreviatePackageNamePattern.getText()) == null) {
	return new StatusInfo(IStatus.ERROR, PreferencesMessages.AppearancePreferencePage_packageNameAbbreviationPattern_error_isInvalid);
	}

	if (fCompressPackageNames.isSelected() && fPackageNamePattern.getText().isEmpty())
	return new StatusInfo(IStatus.ERROR, PreferencesMessages.AppearancePreferencePage_packageNameCompressionPattern_error_isEmpty);

	return new StatusInfo();
	}

	private void updateStatus(IStatus status) {
	setValid(!status.matches(IStatus.ERROR));
	StatusUtil.applyToStatusLine(this, status);
	}

	/*
	* @see IWorkbenchPreferencePage#init(IWorkbench)
	*/
	@Override
	public void init(IWorkbench workbench) {
	}

	/*
	* @see IPreferencePage#performOk()
	*/
	@Override
	public boolean performOk() {
	IPreferenceStore prefs= getPreferenceStore();
	prefs.setValue(PREF_METHOD_RETURNTYPE, fShowMethodReturnType.isSelected());
	prefs.setValue(PREF_METHOD_TYPEPARAMETERS, fShowMethodTypeParameters.isSelected());
	prefs.setValue(PREF_CATEGORY, fShowCategory.isSelected());
	prefs.setValue(SHOW_CU_CHILDREN, fShowMembersInPackageView.isSelected());
	prefs.setValue(DECORATE_TEST_CODE_CONTAINER_ICONS, fDecorateTestCodeContainerIcons.isSelected());
	prefs.setValue(STACK_BROWSING_VIEWS_VERTICALLY, fStackBrowsingViewsVertically.isSelected());
	prefs.setValue(PREF_PKG_NAME_PATTERN_FOR_PKG_VIEW, fPackageNamePattern.getText());
	prefs.setValue(PREF_COMPRESS_PACKAGE_NAMES, fCompressPackageNames.isSelected());
	prefs.setValue(PREF_PKG_NAME_ABBREVIATION_PATTERN_FOR_PKG_VIEW, fAbbreviatePackageNamePattern.getText());
	prefs.setValue(PREF_ABBREVIATE_PACKAGE_NAMES, fAbbreviatePackageNames.isSelected());
	prefs.setValue(PREF_FOLD_PACKAGES_IN_PACKAGE_EXPLORER, fFoldPackagesInPackageExplorer.isSelected());
	prefs.setValue(PREF_SORT_LIBRARY_ENTRIES_BY_NAME, fSortLibraryEntriesByName.isSelected());
	JavaPlugin.flushInstanceScope();
	return super.performOk();
	}

	/*
	* @see PreferencePage#performDefaults()
	*/
	@Override
	protected void performDefaults() {
	IPreferenceStore prefs= getPreferenceStore();
	fShowMethodReturnType.setSelection(prefs.getDefaultBoolean(PREF_METHOD_RETURNTYPE));
	fShowMethodTypeParameters.setSelection(prefs.getDefaultBoolean(PREF_METHOD_TYPEPARAMETERS));
	fShowCategory.setSelection(prefs.getDefaultBoolean(PREF_CATEGORY));
	fShowMembersInPackageView.setSelection(prefs.getDefaultBoolean(SHOW_CU_CHILDREN));
	fDecorateTestCodeContainerIcons.setSelection(prefs.getDefaultBoolean(DECORATE_TEST_CODE_CONTAINER_ICONS));
	fStackBrowsingViewsVertically.setSelection(prefs.getDefaultBoolean(STACK_BROWSING_VIEWS_VERTICALLY));
	fPackageNamePattern.setText(prefs.getDefaultString(PREF_PKG_NAME_PATTERN_FOR_PKG_VIEW));
	fCompressPackageNames.setSelection(prefs.getDefaultBoolean(PREF_COMPRESS_PACKAGE_NAMES));
	fAbbreviatePackageNamePattern.setText(prefs.getDefaultString(PREF_PKG_NAME_ABBREVIATION_PATTERN_FOR_PKG_VIEW));
	fAbbreviatePackageNames.setSelection(prefs.getDefaultBoolean(PREF_ABBREVIATE_PACKAGE_NAMES));
	fFoldPackagesInPackageExplorer.setSelection(prefs.getDefaultBoolean(PREF_FOLD_PACKAGES_IN_PACKAGE_EXPLORER));
	fSortLibraryEntriesByName.setSelection(prefs.getDefaultBoolean(PREF_SORT_LIBRARY_ENTRIES_BY_NAME));
	super.performDefaults();
	}
	}