org.eclipse.ui.editors/src/org/eclipse/ui/internal/editors/text/QuickDiffConfigurationBlock.java - platform/eclipse.platform.text - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *     hiroyuki.inaba@jp.fujitsu.com (Hiroyuki Inaba) - https://bugs.eclipse.org/bugs/show_bug.cgi?id=82224
  *******************************************************************************/

 package org.eclipse.ui.internal.editors.text;

 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.events.SelectionListener;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Combo;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Group;
 import org.eclipse.swt.widgets.Label;

 import org.eclipse.core.runtime.Assert;

 import org.eclipse.jface.action.LegacyActionTools;
 import org.eclipse.jface.preference.ColorSelector;
 import org.eclipse.jface.preference.PreferenceConverter;

 import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants;
 import org.eclipse.ui.texteditor.AnnotationPreference;
 import org.eclipse.ui.texteditor.MarkerAnnotationPreferences;
 import org.eclipse.ui.texteditor.quickdiff.QuickDiff;
 import org.eclipse.ui.texteditor.quickdiff.ReferenceProviderDescriptor;
 import org.eclipse.ui.texteditor.spelling.SpellingService;

 /**
  * Configures quick diff preferences
  *
  * @since 3.0
  */
 class QuickDiffConfigurationBlock implements IPreferenceConfigurationBlock {

 	private OverlayPreferenceStore fStore;

 	private Map fCheckBoxes= new HashMap();
 	private SelectionListener fCheckBoxListener= new SelectionListener() {
 		public void widgetDefaultSelected(SelectionEvent e) {
 		}
 		public void widgetSelected(SelectionEvent e) {
 			Button button= (Button) e.widget;
 			fStore.setValue((String) fCheckBoxes.get(button), button.getSelection());
 		}
 	};

 	/**
 	 * List for the reference provider default.
 	 * @since 3.0
 	 */
 	private Combo fQuickDiffProviderCombo;
 	/**
 	 * The reference provider default's list model.
 	 * @since 3.0
 	 */
 	private String[][] fQuickDiffProviderListModel;
 	/**
 	 * The quick diff color model.
 	 * @since 3.0
 	 */
 	private String[][] fQuickDiffModel;
 	/**
 	 * The color editors for quick diff.
 	 * @since 3.0
 	 */
 	private ColorSelector[] fQuickDiffColorEditors;
 	/**
 	 * The checkbox for the quick diff overview ruler property.
 	 * @since 3.0
 	 */
 	private Button fQuickDiffOverviewRulerCheckBox;

 	/**
 	 * The enablement checkbox.
 	 * @since 3.3.
 	 */
 	private Button fEnablementCheckbox;


 	public QuickDiffConfigurationBlock(OverlayPreferenceStore store) {
 		Assert.isNotNull(store);
 		fStore= store;
 		MarkerAnnotationPreferences markerAnnotationPreferences= EditorsPlugin.getDefault().getMarkerAnnotationPreferences();
 		fStore.addKeys(createOverlayStoreKeys(markerAnnotationPreferences));
 		fQuickDiffModel= createQuickDiffModel(markerAnnotationPreferences);
 		fQuickDiffProviderListModel= createQuickDiffReferenceListModel();
 	}

 	private OverlayPreferenceStore.OverlayKey[] createOverlayStoreKeys(MarkerAnnotationPreferences preferences) {
 		ArrayList overlayKeys= new ArrayList();

 		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, AbstractDecoratedTextEditorPreferenceConstants.QUICK_DIFF_ALWAYS_ON));
 		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.STRING, AbstractDecoratedTextEditorPreferenceConstants.QUICK_DIFF_DEFAULT_PROVIDER));

 		Iterator e= preferences.getAnnotationPreferences().iterator();
 		while (e.hasNext()) {
 			AnnotationPreference info= (AnnotationPreference) e.next();

 			if (info.getAnnotationType().equals("org.eclipse.ui.workbench.texteditor.quickdiffChange") //$NON-NLS-1$
 				|| (info.getAnnotationType().equals("org.eclipse.ui.workbench.texteditor.quickdiffAddition")) //$NON-NLS-1$
 				|| (info.getAnnotationType().equals("org.eclipse.ui.workbench.texteditor.quickdiffDeletion")) //$NON-NLS-1$
 			) {
 				overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.STRING, info.getColorPreferenceKey()));
 				overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, info.getOverviewRulerPreferenceKey()));
 			}
 		}

 		OverlayPreferenceStore.OverlayKey[] keys= new OverlayPreferenceStore.OverlayKey[overlayKeys.size()];
 		overlayKeys.toArray(keys);
 		return keys;
 	}

 	private String[][] createQuickDiffModel(MarkerAnnotationPreferences preferences) {
 		String[][] items= new String[3][];

 		Iterator e= preferences.getAnnotationPreferences().iterator();
 		while (e.hasNext()) {
 			AnnotationPreference info= (AnnotationPreference) e.next();
 			if (info.getAnnotationType().equals("org.eclipse.ui.workbench.texteditor.quickdiffChange")) //$NON-NLS-1$
 				items[0]= new String[] { info.getColorPreferenceKey(), info.getOverviewRulerPreferenceKey(), TextEditorMessages.QuickDiffConfigurationBlock_changeColor };
 			else if (info.getAnnotationType().equals("org.eclipse.ui.workbench.texteditor.quickdiffAddition")) //$NON-NLS-1$
 				items[1]= new String[] { info.getColorPreferenceKey(), info.getOverviewRulerPreferenceKey(), TextEditorMessages.QuickDiffConfigurationBlock_additionColor };
 			else if (info.getAnnotationType().equals("org.eclipse.ui.workbench.texteditor.quickdiffDeletion")) //$NON-NLS-1$
 				items[2]= new String[] { info.getColorPreferenceKey(), info.getOverviewRulerPreferenceKey(), TextEditorMessages.QuickDiffConfigurationBlock_deletionColor };
 		}
 		return items;
 	}

 	private String[][] createQuickDiffReferenceListModel() {
 		java.util.List descriptors= new QuickDiff().getReferenceProviderDescriptors();
 		ArrayList listModelItems= new ArrayList();
 		for (Iterator it= descriptors.iterator(); it.hasNext();) {
 			ReferenceProviderDescriptor descriptor= (ReferenceProviderDescriptor) it.next();
 			String label= LegacyActionTools.removeMnemonics(descriptor.getLabel());
 			listModelItems.add(new String[] { descriptor.getId(), label });
 		}
 		String[][] items= new String[listModelItems.size()][];
 		listModelItems.toArray(items);
 		return items;
 	}

 	private Button addCheckBox(Composite parent, String label, String key, int indentation) {
 		Button checkBox= new Button(parent, SWT.CHECK);
 		checkBox.setText(label);

 		GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
 		gd.horizontalIndent= indentation;
 		gd.horizontalSpan= 2;
 		checkBox.setLayoutData(gd);
 		checkBox.addSelectionListener(fCheckBoxListener);

 		fCheckBoxes.put(checkBox, key);

 		return checkBox;
 	}

 	/**
 	 * Creates page for hover preferences.
 	 *
 	 * @param parent the parent composite
 	 * @return the created child composite
 	 */
 	public Control createControl(Composite parent) {
 		Composite composite= new Composite(parent, SWT.NONE);
 		GridLayout layout= new GridLayout();
 		layout.numColumns= 2;
 		layout.marginHeight= 0;
 		layout.marginWidth= 0;
 		composite.setLayout(layout);

 		String label= TextEditorMessages.QuickDiffConfigurationBlock_showForNewEditors;
 		fEnablementCheckbox= addCheckBox(composite, label, AbstractDecoratedTextEditorPreferenceConstants.QUICK_DIFF_ALWAYS_ON, 0);
 		fEnablementCheckbox.addSelectionListener(new SelectionListener() {
 			public void widgetSelected(SelectionEvent e) {
 				boolean enabled= fEnablementCheckbox.getSelection();
 				fStore.setValue(SpellingService.PREFERENCE_SPELLING_ENABLED, enabled);
 				updateEnablement();
 			}

 			public void widgetDefaultSelected(SelectionEvent e) {
 			}
 		});

 		addFiller(composite);

 		label= TextEditorMessages.QuickDiffConfigurationBlock_showInOverviewRuler;
 		fQuickDiffOverviewRulerCheckBox= new Button(composite, SWT.CHECK);
 		fQuickDiffOverviewRulerCheckBox.setText(label);

 		GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
 		gd.horizontalIndent= 0;
 		gd.horizontalSpan= 2;
 		gd.horizontalIndent= 10;
 		fQuickDiffOverviewRulerCheckBox.setLayoutData(gd);
 		fQuickDiffOverviewRulerCheckBox.addSelectionListener(new SelectionListener() {
 			public void widgetSelected(SelectionEvent e) {
 				for (int i= 0; i < fQuickDiffModel.length; i++) {
 					fStore.setValue(fQuickDiffModel[i][1], fQuickDiffOverviewRulerCheckBox.getSelection());
 				}
 			}

 			public void widgetDefaultSelected(SelectionEvent e) {
 			}
 		});

 		// spacer
 		Label l= new Label(composite, SWT.LEFT );
 		gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		gd.horizontalSpan= 2;
 		gd.horizontalIndent= 10;
 		gd.heightHint= 5;
 		l.setLayoutData(gd);

 		Group group= new Group(composite, SWT.NONE);
 		group.setText(TextEditorMessages.QuickDiffConfigurationBlock_colorTitle);
 		layout= new GridLayout();
 		layout.numColumns= 2;
 		group.setLayout(layout);
 		gd= new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
 		gd.horizontalSpan= 2;
 		gd.horizontalIndent= 10;
 		group.setLayoutData(gd);

 		fQuickDiffColorEditors= new ColorSelector[3];
 		for (int i= 0; i < fQuickDiffModel.length; i++) {
 			label= fQuickDiffModel[i][2];
 			l= new Label(group, SWT.LEFT);
 			l.setText(label);
 			final ColorSelector editor= new ColorSelector(group);
 			fQuickDiffColorEditors[i]= editor;
 			Button changeColorButton= editor.getButton();
 			gd= new GridData(GridData.FILL_HORIZONTAL);
 			gd.horizontalAlignment= GridData.BEGINNING;
 			changeColorButton.setLayoutData(gd);
 			final int index= i;
 			changeColorButton.addSelectionListener(new SelectionListener() {
 				public void widgetDefaultSelected(SelectionEvent e) {
 					// do nothing
 				}

 				public void widgetSelected(SelectionEvent e) {
 					String key= fQuickDiffModel[index][0];
 					PreferenceConverter.setValue(fStore, key, editor.getColorValue());
 				}
 			});
 		}

 		addFiller(composite);

 		l= new Label(composite, SWT.LEFT);
 		l.setText(TextEditorMessages.QuickDiffConfigurationBlock_referenceProviderTitle);
 		gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		gd.horizontalSpan= 2;
 		gd.horizontalIndent= 10;
 		l.setLayoutData(gd);

 		Composite editorComposite= new Composite(composite, SWT.NONE);
 		layout= new GridLayout();
 		layout.numColumns= 2;
 		layout.marginHeight= 0;
 		layout.marginWidth= 0;
 		editorComposite.setLayout(layout);
 		gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.FILL_VERTICAL);
 		gd.horizontalSpan= 2;
 		gd.horizontalIndent= 10;
 		editorComposite.setLayoutData(gd);

 		fQuickDiffProviderCombo= new Combo(editorComposite, SWT.DROP_DOWN | SWT.READ_ONLY);
 		gd= new GridData(GridData.VERTICAL_ALIGN_BEGINNING | GridData.FILL_HORIZONTAL);
 		fQuickDiffProviderCombo.setLayoutData(gd);

 		Composite stylesComposite= new Composite(editorComposite, SWT.NONE);
 		layout= new GridLayout();
 		layout.marginHeight= 0;
 		layout.marginWidth= 0;
 		layout.numColumns= 2;
 		stylesComposite.setLayout(layout);
 		stylesComposite.setLayoutData(new GridData(GridData.FILL_BOTH));

 		fQuickDiffProviderCombo.addSelectionListener(new SelectionListener() {
 			public void widgetDefaultSelected(SelectionEvent e) {
 				// do nothing
 			}

 			public void widgetSelected(SelectionEvent e) {
 				int i= fQuickDiffProviderCombo.getSelectionIndex();
 				fStore.setValue(AbstractDecoratedTextEditorPreferenceConstants.QUICK_DIFF_DEFAULT_PROVIDER, fQuickDiffProviderListModel[i][0]);
 			}

 		});

 		return composite;
 	}

 	/*
 	 * @see org.eclipse.ui.internal.editors.text.IPreferenceConfigurationBlock#applyData(java.lang.Object)
 	 * @since 3.4
 	 */
 	public void applyData(Object data) {
 	}

 	private void addFiller(Composite composite) {
 		PixelConverter pixelConverter= new PixelConverter(composite);

 		Label filler= new Label(composite, SWT.LEFT );
 		GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		gd.horizontalSpan= 2;
 		gd.heightHint= pixelConverter.convertHeightInCharsToPixels(1) / 2;
 		filler.setLayoutData(gd);
 	}

 	private void updateEnablement() {
 		final boolean enabled= fEnablementCheckbox.getSelection();
 		fQuickDiffOverviewRulerCheckBox.setEnabled(enabled);
 		fQuickDiffProviderCombo.setEnabled(enabled);
 		for (int i= 0; i < fQuickDiffColorEditors.length; i++)
 			fQuickDiffColorEditors[i].setEnabled(enabled);
 	}

 	private void updateProviderList() {
 		String defaultProvider= fStore.getString(AbstractDecoratedTextEditorPreferenceConstants.QUICK_DIFF_DEFAULT_PROVIDER);
 		for (int j= 0; j < fQuickDiffProviderListModel.length; j++) {
 			if (defaultProvider.equals(fQuickDiffProviderListModel[j][0])) {
 				fQuickDiffProviderCombo.select(j);
 			}
 		}
 		fQuickDiffProviderCombo.redraw();
 	}

 	public void initialize() {

 		for (int i= 0; i < fQuickDiffProviderListModel.length; i++) {
 			String label= fQuickDiffProviderListModel[i][1];
 			fQuickDiffProviderCombo.add(label);
 		}
 		fQuickDiffProviderCombo.getDisplay().asyncExec(new Runnable() {
 			public void run() {
 				updateProviderList();
 			}
 		});

 		initializeFields();
 	}

 	private void initializeFields() {
 		Iterator e= fCheckBoxes.keySet().iterator();
 		while (e.hasNext()) {
 			Button b= (Button) e.next();
 			String key= (String) fCheckBoxes.get(b);
 			b.setSelection(fStore.getBoolean(key));
 		}

 		updateQuickDiffControls();
 	}

 	public boolean canPerformOk() {
 		return true;
 	}

 	public void performOk() {
 	}

 	public void performDefaults() {
 		initializeFields();
 		updateProviderList();
 	}

 	private void updateQuickDiffControls() {
 		boolean quickdiffOverviewRuler= false;
 		for (int i= 0; i < fQuickDiffModel.length; i++) {
 			fQuickDiffColorEditors[i].setColorValue(PreferenceConverter.getColor(fStore, fQuickDiffModel[i][0]));
 			quickdiffOverviewRuler |= fStore.getBoolean(fQuickDiffModel[i][1]);
 		}
 		fQuickDiffOverviewRulerCheckBox.setSelection(quickdiffOverviewRuler);
 	}

 	/*
 	 * @see org.eclipse.ui.internal.editors.text.IPreferenceConfigurationBlock#dispose()
 	 * @since 3.0
 	 */
 	public void dispose() {
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2007 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	* hiroyuki.inaba@jp.fujitsu.com (Hiroyuki Inaba) - https://bugs.eclipse.org/bugs/show_bug.cgi?id=82224
	*******************************************************************************/

	package org.eclipse.ui.internal.editors.text;

	import java.util.ArrayList;
	import java.util.HashMap;
	import java.util.Iterator;
	import java.util.Map;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.events.SelectionListener;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Combo;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Group;
	import org.eclipse.swt.widgets.Label;

	import org.eclipse.core.runtime.Assert;

	import org.eclipse.jface.action.LegacyActionTools;
	import org.eclipse.jface.preference.ColorSelector;
	import org.eclipse.jface.preference.PreferenceConverter;

	import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants;
	import org.eclipse.ui.texteditor.AnnotationPreference;
	import org.eclipse.ui.texteditor.MarkerAnnotationPreferences;
	import org.eclipse.ui.texteditor.quickdiff.QuickDiff;
	import org.eclipse.ui.texteditor.quickdiff.ReferenceProviderDescriptor;
	import org.eclipse.ui.texteditor.spelling.SpellingService;

	/**
	* Configures quick diff preferences
	*
	* @since 3.0
	*/
	class QuickDiffConfigurationBlock implements IPreferenceConfigurationBlock {

	private OverlayPreferenceStore fStore;

	private Map fCheckBoxes= new HashMap();
	private SelectionListener fCheckBoxListener= new SelectionListener() {
	public void widgetDefaultSelected(SelectionEvent e) {
	}
	public void widgetSelected(SelectionEvent e) {
	Button button= (Button) e.widget;
	fStore.setValue((String) fCheckBoxes.get(button), button.getSelection());
	}
	};

	/**
	* List for the reference provider default.
	* @since 3.0
	*/
	private Combo fQuickDiffProviderCombo;
	/**
	* The reference provider default's list model.
	* @since 3.0
	*/
	private String[][] fQuickDiffProviderListModel;
	/**
	* The quick diff color model.
	* @since 3.0
	*/
	private String[][] fQuickDiffModel;
	/**
	* The color editors for quick diff.
	* @since 3.0
	*/
	private ColorSelector[] fQuickDiffColorEditors;
	/**
	* The checkbox for the quick diff overview ruler property.
	* @since 3.0
	*/
	private Button fQuickDiffOverviewRulerCheckBox;

	/**
	* The enablement checkbox.
	* @since 3.3.
	*/
	private Button fEnablementCheckbox;


	public QuickDiffConfigurationBlock(OverlayPreferenceStore store) {
	Assert.isNotNull(store);
	fStore= store;
	MarkerAnnotationPreferences markerAnnotationPreferences= EditorsPlugin.getDefault().getMarkerAnnotationPreferences();
	fStore.addKeys(createOverlayStoreKeys(markerAnnotationPreferences));
	fQuickDiffModel= createQuickDiffModel(markerAnnotationPreferences);
	fQuickDiffProviderListModel= createQuickDiffReferenceListModel();
	}

	private OverlayPreferenceStore.OverlayKey[] createOverlayStoreKeys(MarkerAnnotationPreferences preferences) {
	ArrayList overlayKeys= new ArrayList();

	overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, AbstractDecoratedTextEditorPreferenceConstants.QUICK_DIFF_ALWAYS_ON));
	overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.STRING, AbstractDecoratedTextEditorPreferenceConstants.QUICK_DIFF_DEFAULT_PROVIDER));

	Iterator e= preferences.getAnnotationPreferences().iterator();
	while (e.hasNext()) {
	AnnotationPreference info= (AnnotationPreference) e.next();

	if (info.getAnnotationType().equals("org.eclipse.ui.workbench.texteditor.quickdiffChange") //$NON-NLS-1$
	\|\| (info.getAnnotationType().equals("org.eclipse.ui.workbench.texteditor.quickdiffAddition")) //$NON-NLS-1$
	\|\| (info.getAnnotationType().equals("org.eclipse.ui.workbench.texteditor.quickdiffDeletion")) //$NON-NLS-1$
	) {
	overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.STRING, info.getColorPreferenceKey()));
	overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, info.getOverviewRulerPreferenceKey()));
	}
	}

	OverlayPreferenceStore.OverlayKey[] keys= new OverlayPreferenceStore.OverlayKey[overlayKeys.size()];
	overlayKeys.toArray(keys);
	return keys;
	}

	private String[][] createQuickDiffModel(MarkerAnnotationPreferences preferences) {
	String[][] items= new String[3][];

	Iterator e= preferences.getAnnotationPreferences().iterator();
	while (e.hasNext()) {
	AnnotationPreference info= (AnnotationPreference) e.next();
	if (info.getAnnotationType().equals("org.eclipse.ui.workbench.texteditor.quickdiffChange")) //$NON-NLS-1$
	items[0]= new String[] { info.getColorPreferenceKey(), info.getOverviewRulerPreferenceKey(), TextEditorMessages.QuickDiffConfigurationBlock_changeColor };
	else if (info.getAnnotationType().equals("org.eclipse.ui.workbench.texteditor.quickdiffAddition")) //$NON-NLS-1$
	items[1]= new String[] { info.getColorPreferenceKey(), info.getOverviewRulerPreferenceKey(), TextEditorMessages.QuickDiffConfigurationBlock_additionColor };
	else if (info.getAnnotationType().equals("org.eclipse.ui.workbench.texteditor.quickdiffDeletion")) //$NON-NLS-1$
	items[2]= new String[] { info.getColorPreferenceKey(), info.getOverviewRulerPreferenceKey(), TextEditorMessages.QuickDiffConfigurationBlock_deletionColor };
	}
	return items;
	}

	private String[][] createQuickDiffReferenceListModel() {
	java.util.List descriptors= new QuickDiff().getReferenceProviderDescriptors();
	ArrayList listModelItems= new ArrayList();
	for (Iterator it= descriptors.iterator(); it.hasNext();) {
	ReferenceProviderDescriptor descriptor= (ReferenceProviderDescriptor) it.next();
	String label= LegacyActionTools.removeMnemonics(descriptor.getLabel());
	listModelItems.add(new String[] { descriptor.getId(), label });
	}
	String[][] items= new String[listModelItems.size()][];
	listModelItems.toArray(items);
	return items;
	}

	private Button addCheckBox(Composite parent, String label, String key, int indentation) {
	Button checkBox= new Button(parent, SWT.CHECK);
	checkBox.setText(label);

	GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
	gd.horizontalIndent= indentation;
	gd.horizontalSpan= 2;
	checkBox.setLayoutData(gd);
	checkBox.addSelectionListener(fCheckBoxListener);

	fCheckBoxes.put(checkBox, key);

	return checkBox;
	}

	/**
	* Creates page for hover preferences.
	*
	* @param parent the parent composite
	* @return the created child composite
	*/
	public Control createControl(Composite parent) {
	Composite composite= new Composite(parent, SWT.NONE);
	GridLayout layout= new GridLayout();
	layout.numColumns= 2;
	layout.marginHeight= 0;
	layout.marginWidth= 0;
	composite.setLayout(layout);

	String label= TextEditorMessages.QuickDiffConfigurationBlock_showForNewEditors;
	fEnablementCheckbox= addCheckBox(composite, label, AbstractDecoratedTextEditorPreferenceConstants.QUICK_DIFF_ALWAYS_ON, 0);
	fEnablementCheckbox.addSelectionListener(new SelectionListener() {
	public void widgetSelected(SelectionEvent e) {
	boolean enabled= fEnablementCheckbox.getSelection();
	fStore.setValue(SpellingService.PREFERENCE_SPELLING_ENABLED, enabled);
	updateEnablement();
	}

	public void widgetDefaultSelected(SelectionEvent e) {
	}
	});

	addFiller(composite);

	label= TextEditorMessages.QuickDiffConfigurationBlock_showInOverviewRuler;
	fQuickDiffOverviewRulerCheckBox= new Button(composite, SWT.CHECK);
	fQuickDiffOverviewRulerCheckBox.setText(label);

	GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
	gd.horizontalIndent= 0;
	gd.horizontalSpan= 2;
	gd.horizontalIndent= 10;
	fQuickDiffOverviewRulerCheckBox.setLayoutData(gd);
	fQuickDiffOverviewRulerCheckBox.addSelectionListener(new SelectionListener() {
	public void widgetSelected(SelectionEvent e) {
	for (int i= 0; i < fQuickDiffModel.length; i++) {
	fStore.setValue(fQuickDiffModel[i][1], fQuickDiffOverviewRulerCheckBox.getSelection());
	}
	}

	public void widgetDefaultSelected(SelectionEvent e) {
	}
	});

	// spacer
	Label l= new Label(composite, SWT.LEFT );
	gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	gd.horizontalSpan= 2;
	gd.horizontalIndent= 10;
	gd.heightHint= 5;
	l.setLayoutData(gd);

	Group group= new Group(composite, SWT.NONE);
	group.setText(TextEditorMessages.QuickDiffConfigurationBlock_colorTitle);
	layout= new GridLayout();
	layout.numColumns= 2;
	group.setLayout(layout);
	gd= new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
	gd.horizontalSpan= 2;
	gd.horizontalIndent= 10;
	group.setLayoutData(gd);

	fQuickDiffColorEditors= new ColorSelector[3];
	for (int i= 0; i < fQuickDiffModel.length; i++) {
	label= fQuickDiffModel[i][2];
	l= new Label(group, SWT.LEFT);
	l.setText(label);
	final ColorSelector editor= new ColorSelector(group);
	fQuickDiffColorEditors[i]= editor;
	Button changeColorButton= editor.getButton();
	gd= new GridData(GridData.FILL_HORIZONTAL);
	gd.horizontalAlignment= GridData.BEGINNING;
	changeColorButton.setLayoutData(gd);
	final int index= i;
	changeColorButton.addSelectionListener(new SelectionListener() {
	public void widgetDefaultSelected(SelectionEvent e) {
	// do nothing
	}

	public void widgetSelected(SelectionEvent e) {
	String key= fQuickDiffModel[index][0];
	PreferenceConverter.setValue(fStore, key, editor.getColorValue());
	}
	});
	}

	addFiller(composite);

	l= new Label(composite, SWT.LEFT);
	l.setText(TextEditorMessages.QuickDiffConfigurationBlock_referenceProviderTitle);
	gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	gd.horizontalSpan= 2;
	gd.horizontalIndent= 10;
	l.setLayoutData(gd);

	Composite editorComposite= new Composite(composite, SWT.NONE);
	layout= new GridLayout();
	layout.numColumns= 2;
	layout.marginHeight= 0;
	layout.marginWidth= 0;
	editorComposite.setLayout(layout);
	gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL \| GridData.FILL_VERTICAL);
	gd.horizontalSpan= 2;
	gd.horizontalIndent= 10;
	editorComposite.setLayoutData(gd);

	fQuickDiffProviderCombo= new Combo(editorComposite, SWT.DROP_DOWN \| SWT.READ_ONLY);
	gd= new GridData(GridData.VERTICAL_ALIGN_BEGINNING \| GridData.FILL_HORIZONTAL);
	fQuickDiffProviderCombo.setLayoutData(gd);

	Composite stylesComposite= new Composite(editorComposite, SWT.NONE);
	layout= new GridLayout();
	layout.marginHeight= 0;
	layout.marginWidth= 0;
	layout.numColumns= 2;
	stylesComposite.setLayout(layout);
	stylesComposite.setLayoutData(new GridData(GridData.FILL_BOTH));

	fQuickDiffProviderCombo.addSelectionListener(new SelectionListener() {
	public void widgetDefaultSelected(SelectionEvent e) {
	// do nothing
	}

	public void widgetSelected(SelectionEvent e) {
	int i= fQuickDiffProviderCombo.getSelectionIndex();
	fStore.setValue(AbstractDecoratedTextEditorPreferenceConstants.QUICK_DIFF_DEFAULT_PROVIDER, fQuickDiffProviderListModel[i][0]);
	}

	});

	return composite;
	}

	/*
	* @see org.eclipse.ui.internal.editors.text.IPreferenceConfigurationBlock#applyData(java.lang.Object)
	* @since 3.4
	*/
	public void applyData(Object data) {
	}

	private void addFiller(Composite composite) {
	PixelConverter pixelConverter= new PixelConverter(composite);

	Label filler= new Label(composite, SWT.LEFT );
	GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	gd.horizontalSpan= 2;
	gd.heightHint= pixelConverter.convertHeightInCharsToPixels(1) / 2;
	filler.setLayoutData(gd);
	}

	private void updateEnablement() {
	final boolean enabled= fEnablementCheckbox.getSelection();
	fQuickDiffOverviewRulerCheckBox.setEnabled(enabled);
	fQuickDiffProviderCombo.setEnabled(enabled);
	for (int i= 0; i < fQuickDiffColorEditors.length; i++)
	fQuickDiffColorEditors[i].setEnabled(enabled);
	}

	private void updateProviderList() {
	String defaultProvider= fStore.getString(AbstractDecoratedTextEditorPreferenceConstants.QUICK_DIFF_DEFAULT_PROVIDER);
	for (int j= 0; j < fQuickDiffProviderListModel.length; j++) {
	if (defaultProvider.equals(fQuickDiffProviderListModel[j][0])) {
	fQuickDiffProviderCombo.select(j);
	}
	}
	fQuickDiffProviderCombo.redraw();
	}

	public void initialize() {

	for (int i= 0; i < fQuickDiffProviderListModel.length; i++) {
	String label= fQuickDiffProviderListModel[i][1];
	fQuickDiffProviderCombo.add(label);
	}
	fQuickDiffProviderCombo.getDisplay().asyncExec(new Runnable() {
	public void run() {
	updateProviderList();
	}
	});

	initializeFields();
	}

	private void initializeFields() {
	Iterator e= fCheckBoxes.keySet().iterator();
	while (e.hasNext()) {
	Button b= (Button) e.next();
	String key= (String) fCheckBoxes.get(b);
	b.setSelection(fStore.getBoolean(key));
	}

	updateQuickDiffControls();
	}

	public boolean canPerformOk() {
	return true;
	}

	public void performOk() {
	}

	public void performDefaults() {
	initializeFields();
	updateProviderList();
	}

	private void updateQuickDiffControls() {
	boolean quickdiffOverviewRuler= false;
	for (int i= 0; i < fQuickDiffModel.length; i++) {
	fQuickDiffColorEditors[i].setColorValue(PreferenceConverter.getColor(fStore, fQuickDiffModel[i][0]));
	quickdiffOverviewRuler \|= fStore.getBoolean(fQuickDiffModel[i][1]);
	}
	fQuickDiffOverviewRulerCheckBox.setSelection(quickdiffOverviewRuler);
	}

	/*
	* @see org.eclipse.ui.internal.editors.text.IPreferenceConfigurationBlock#dispose()
	* @since 3.0
	*/
	public void dispose() {
	}
	}