org.eclipse.search/new search/org/eclipse/search2/internal/ui/SearchHistorySelectionDialog.java - platform/eclipse.platform.text - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2015 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
  *******************************************************************************/
 package org.eclipse.search2.internal.ui;

 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.events.MouseAdapter;
 import org.eclipse.swt.events.MouseEvent;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Link;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.Text;

 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;

 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.dialogs.StatusDialog;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.jface.viewers.ArrayContentProvider;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.LabelProvider;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.window.Window;

 import org.eclipse.ui.dialogs.SelectionDialog;

 import org.eclipse.search.internal.ui.SearchPlugin;
 import org.eclipse.search.internal.ui.SearchPreferencePage;
 import org.eclipse.search.internal.ui.util.SWTUtil;
 import org.eclipse.search.ui.ISearchQuery;
 import org.eclipse.search.ui.ISearchResult;

 /**
  * Dialog that shows a list of items with icon and label.
  */
 public class SearchHistorySelectionDialog extends SelectionDialog {

 	private static final int REMOVE_ID= IDialogConstants.CLIENT_ID+1;
 	private static final int WIDTH_IN_CHARACTERS= 55;

 	private List<ISearchResult> fInput;
 	private final List<ISearchResult> fRemovedEntries;

 	private TableViewer fViewer;
 	private Button fRemoveButton;

 	private boolean fIsOpenInNewView;
 	private Link fLink;

 	private static class HistoryConfigurationDialog extends StatusDialog {

 		private static final int DEFAULT_ID= 100;

 		private int fHistorySize;
 		private Text fHistorySizeTextField;
 		private final List<ISearchResult> fCurrentList;
 		private final List<ISearchResult> fCurrentRemoves;

 		public HistoryConfigurationDialog(Shell parent, List<ISearchResult> currentList, List<ISearchResult> removedEntries) {
 			super(parent);
 			fCurrentList= currentList;
 			fCurrentRemoves= removedEntries;
 			setTitle(SearchMessages.SearchHistorySelectionDialog_history_size_title);
 			fHistorySize= SearchPreferencePage.getHistoryLimit();
 			setHelpAvailable(false);
 		}

 		@Override
 		protected boolean isResizable() {
 			return true;
 		}

 		/*
 		 * Overrides method from Dialog
 		 */
 		@Override
 		protected Control createDialogArea(Composite container) {
 			Composite ancestor= (Composite) super.createDialogArea(container);
 			GridLayout layout= (GridLayout) ancestor.getLayout();
 			layout.numColumns= 2;
 			ancestor.setLayout(layout);

 			Label limitText= new Label(ancestor, SWT.NONE);
 			limitText.setText(SearchMessages.SearchHistorySelectionDialog_history_size_description);
 			limitText.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));

 			fHistorySizeTextField= new Text(ancestor, SWT.BORDER | SWT.RIGHT);
 			fHistorySizeTextField.setTextLimit(2);
 			fHistorySizeTextField.setText(String.valueOf(fHistorySize));
 			fHistorySizeTextField.addModifyListener(new ModifyListener() {
 				@Override
 				public void modifyText(ModifyEvent e) {
 					validateDialogState();
 				}
 			});

 			GridData gridData= new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1);
 			gridData.widthHint= convertWidthInCharsToPixels(6);
 			fHistorySizeTextField.setLayoutData(gridData);
 			fHistorySizeTextField.setSelection(0, fHistorySizeTextField.getText().length());
 			applyDialogFont(ancestor);

 			return ancestor;
 		}

 		@Override
 		protected void createButtonsForButtonBar(Composite parent) {
 			createButton(parent, DEFAULT_ID, SearchMessages.SearchHistorySelectionDialog_restore_default_button, false);
 			super.createButtonsForButtonBar(parent);
 		}

 		@Override
 		protected void buttonPressed(int buttonId) {
 			if (buttonId == DEFAULT_ID) {
 				IPreferenceStore store= SearchPlugin.getDefault().getPreferenceStore();
 				fHistorySizeTextField.setText(store.getDefaultString(SearchPreferencePage.LIMIT_HISTORY));
 				validateDialogState();
 			}
 			super.buttonPressed(buttonId);
 		}


 		protected final boolean validateDialogState() {
 			IStatus status= null;
 			try {
 				String historySize= fHistorySizeTextField.getText();
 				int size= Integer.parseInt(historySize);
 				if (size < 1 || size >= 100) {
 					status= new Status(IStatus.ERROR, SearchPlugin.getID(), IStatus.ERROR, SearchMessages.SearchHistorySelectionDialog_history_size_error, null);
 				} else {
 					fHistorySize= size;
 				}
 			} catch (NumberFormatException e) {
 				status= new Status(IStatus.ERROR, SearchPlugin.getID(), IStatus.ERROR, SearchMessages.SearchHistorySelectionDialog_history_size_error, null);
 			}
 			if (status == null) {
 				status= Status.OK_STATUS;
 			}
 			updateStatus(status);
 			return !status.matches(IStatus.ERROR);
 		}

 		@Override
 		protected void okPressed() {
 			IPreferenceStore store= SearchPlugin.getDefault().getPreferenceStore();
 			store.setValue(SearchPreferencePage.LIMIT_HISTORY, fHistorySize);

 			// establish history size
 			for (int i= fCurrentList.size() - 1; i >= fHistorySize; i--) {
 				fCurrentRemoves.add(fCurrentList.get(i));
 				fCurrentList.remove(i);
 			}
 			super.okPressed();
 		}

 	}

 	private static final class SearchesLabelProvider extends LabelProvider {

 		private ArrayList<Image> fImages= new ArrayList<>();

 		@Override
 		public String getText(Object element) {
 			return ((ISearchResult)element).getLabel();
 		}

 		@Override
 		public Image getImage(Object element) {

 			ImageDescriptor imageDescriptor= ((ISearchResult)element).getImageDescriptor();
 			if (imageDescriptor == null)
 				return null;

 			Image image= imageDescriptor.createImage();
 			fImages.add(image);

 			return image;
 		}

 		@Override
 		public void dispose() {
 			Iterator<Image> iter= fImages.iterator();
 			while (iter.hasNext())
 				iter.next().dispose();

 			fImages= null;
 		}
 	}

 	public SearchHistorySelectionDialog(Shell parent, List<ISearchResult> input) {
 		super(parent);
 		setTitle(SearchMessages.SearchesDialog_title);
 		setMessage(SearchMessages.SearchesDialog_message);
 		fInput= input;
 		fRemovedEntries= new ArrayList<>();
 		setHelpAvailable(false);
 	}

 	/**
 	 * @return the isOpenInNewView
 	 */
 	public boolean isOpenInNewView() {
 		return fIsOpenInNewView;
 	}

 	@Override
 	protected IDialogSettings getDialogBoundsSettings() {
 		return SearchPlugin.getDefault().getDialogSettingsSection("DialogBounds_SearchHistorySelectionDialog"); //$NON-NLS-1$
 	}

 	@Override
 	protected int getDialogBoundsStrategy() {
 		return DIALOG_PERSISTSIZE;
 	}


 	/*
 	 * Overrides method from Dialog
 	 */
 	@Override
 	protected Label createMessageArea(Composite composite) {
 		Composite parent= new Composite(composite, SWT.NONE);
 		GridLayout layout= new GridLayout();
 		layout.numColumns= 2;
 		layout.marginHeight= 0;
 		layout.marginWidth= 0;
 		parent.setLayout(layout);
 		parent.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

 		Label label = new Label(parent,SWT.WRAP);
 		label.setText(getMessage());
 		GridData gd= new GridData(GridData.FILL_HORIZONTAL);
 		//gd.widthHint= convertWidthInCharsToPixels(WIDTH_IN_CHARACTERS);
 		label.setLayoutData(gd);


 		applyDialogFont(label);
 		return label;
 	}


 	@Override
 	public void create() {
 		super.create();

 		List<?> initialSelection= getInitialElementSelections();
 		if (initialSelection != null)
 			fViewer.setSelection(new StructuredSelection(initialSelection));

 		validateDialogState();
 	}

 	/*
 	 * Overrides method from Dialog
 	 */
 	@Override
 	protected Control createDialogArea(Composite container) {
 		Composite ancestor= (Composite) super.createDialogArea(container);

 		createMessageArea(ancestor);

 		Composite parent= new Composite(ancestor, SWT.NONE);

 		GridLayout layout= new GridLayout();
 		layout.numColumns= 2;
 		layout.marginHeight= 0;
 		layout.marginWidth= 0;
 		parent.setLayout(layout);
 		parent.setLayoutData(new GridData(GridData.FILL_BOTH));

 		fViewer= new TableViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER | SWT.FULL_SELECTION);
 		fViewer.setContentProvider(new ArrayContentProvider());

 		final Table table= fViewer.getTable();
 		table.addMouseListener(new MouseAdapter() {
 			@Override
 			public void mouseDoubleClick(MouseEvent e) {
 				okPressed();
 			}
 		});
 		fViewer.setLabelProvider(new SearchesLabelProvider());
 		GridData gd= new GridData(GridData.FILL_BOTH);
 		gd.heightHint= convertHeightInCharsToPixels(15);
 		gd.widthHint= convertWidthInCharsToPixels(WIDTH_IN_CHARACTERS);
 		table.setLayoutData(gd);


         fRemoveButton= new Button(parent, SWT.PUSH);
         fRemoveButton.setText(SearchMessages.SearchesDialog_remove_label);
         fRemoveButton.addSelectionListener(new SelectionAdapter() {
             @Override
 			public void widgetSelected(SelectionEvent event) {
                 buttonPressed(REMOVE_ID);
             }
         });
 		fRemoveButton.setLayoutData(new GridData(GridData.BEGINNING, GridData.BEGINNING, false, false));
 		SWTUtil.setButtonDimensionHint(fRemoveButton);

 		fViewer.addSelectionChangedListener(new ISelectionChangedListener() {
 			@Override
 			public void selectionChanged(SelectionChangedEvent event) {
 				validateDialogState();
 			}
 		});

 		fLink= new Link(parent, SWT.NONE);
 		configureHistoryLink();
 		fLink.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				HistoryConfigurationDialog dialog= new HistoryConfigurationDialog(getShell(), fInput, fRemovedEntries);
 				if (dialog.open() == Window.OK) {
 					fViewer.refresh();
 					configureHistoryLink();
 				}
 			}
 		});
 		fLink.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false, 2, 1));


 		applyDialogFont(ancestor);

 		// set input & selections last, so all the widgets are created.
 		fViewer.setInput(fInput);
 		fViewer.getTable().setFocus();
 		return ancestor;
 	}

 	private void configureHistoryLink() {
 		int historyLimit= SearchPreferencePage.getHistoryLimit();
 		fLink.setText(Messages.format(SearchMessages.SearchHistorySelectionDialog_configure_link_label, new Integer(historyLimit)));
 	}

 	protected final void validateDialogState() {
 		IStructuredSelection sel= (IStructuredSelection) fViewer.getSelection();
 		int elementsSelected= sel.toList().size();

 		fRemoveButton.setEnabled(elementsSelected > 0);
 		Button okButton= getOkButton();
 		if (okButton != null) {
 			okButton.setEnabled(elementsSelected == 1);
 		}
 		Button openInNewButton= getButton(IDialogConstants.OPEN_ID);
 		if (openInNewButton != null) {
 			openInNewButton.setEnabled(elementsSelected == 1);
 		}
 	}

 	@Override
 	protected void createButtonsForButtonBar(Composite parent) {
 		createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OPEN_LABEL, true);
 		createButton(parent, IDialogConstants.OPEN_ID, SearchMessages.SearchHistorySelectionDialog_open_in_new_button, 	false);
 		createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);
 	}


 	@Override
 	protected void buttonPressed(int buttonId) {
 		if (buttonId == REMOVE_ID) {
 			IStructuredSelection selection= (IStructuredSelection) fViewer.getSelection();
 			Iterator<?> searchResults= selection.iterator();
 			while (searchResults.hasNext()) {
 				ISearchResult curr= (ISearchResult) searchResults.next();
 				fRemovedEntries.add(curr);
 				fInput.remove(curr);
 				fViewer.remove(curr);
 			}
 			if (fViewer.getSelection().isEmpty() && !fInput.isEmpty()) {
 				fViewer.setSelection(new StructuredSelection(fInput.get(0)));
 			}
 			return;
 		}
 		if (buttonId == IDialogConstants.OPEN_ID) {
 			fIsOpenInNewView= true;
 			buttonId= IDialogConstants.OK_ID;
 		}
 		super.buttonPressed(buttonId);
 	}

 	/*
 	 * Overrides method from Dialog
 	 */
 	@Override
 	protected void okPressed() {
 		// Build a list of selected children.
 		ISelection selection= fViewer.getSelection();
 		if (selection instanceof IStructuredSelection)
 			setResult(((IStructuredSelection) fViewer.getSelection()).toList());

 		// remove queries
 		for (Iterator<ISearchResult> iter= fRemovedEntries.iterator(); iter.hasNext();) {
 			ISearchResult result= iter.next();
 			ISearchQuery query= result.getQuery();
 			if (query != null) { // must not be null: invalid implementation of a search query
 				InternalSearchUI.getInstance().removeQuery(query);
 			}
 		}
 		super.okPressed();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2015 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
	*******************************************************************************/
	package org.eclipse.search2.internal.ui;

	import java.util.ArrayList;
	import java.util.Iterator;
	import java.util.List;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ModifyEvent;
	import org.eclipse.swt.events.ModifyListener;
	import org.eclipse.swt.events.MouseAdapter;
	import org.eclipse.swt.events.MouseEvent;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Link;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.Text;

	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Status;

	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.dialogs.IDialogSettings;
	import org.eclipse.jface.dialogs.StatusDialog;
	import org.eclipse.jface.preference.IPreferenceStore;
	import org.eclipse.jface.resource.ImageDescriptor;
	import org.eclipse.jface.viewers.ArrayContentProvider;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.LabelProvider;
	import org.eclipse.jface.viewers.SelectionChangedEvent;
	import org.eclipse.jface.viewers.StructuredSelection;
	import org.eclipse.jface.viewers.TableViewer;
	import org.eclipse.jface.window.Window;

	import org.eclipse.ui.dialogs.SelectionDialog;

	import org.eclipse.search.internal.ui.SearchPlugin;
	import org.eclipse.search.internal.ui.SearchPreferencePage;
	import org.eclipse.search.internal.ui.util.SWTUtil;
	import org.eclipse.search.ui.ISearchQuery;
	import org.eclipse.search.ui.ISearchResult;

	/**
	* Dialog that shows a list of items with icon and label.
	*/
	public class SearchHistorySelectionDialog extends SelectionDialog {

	private static final int REMOVE_ID= IDialogConstants.CLIENT_ID+1;
	private static final int WIDTH_IN_CHARACTERS= 55;

	private List<ISearchResult> fInput;
	private final List<ISearchResult> fRemovedEntries;

	private TableViewer fViewer;
	private Button fRemoveButton;

	private boolean fIsOpenInNewView;
	private Link fLink;

	private static class HistoryConfigurationDialog extends StatusDialog {

	private static final int DEFAULT_ID= 100;

	private int fHistorySize;
	private Text fHistorySizeTextField;
	private final List<ISearchResult> fCurrentList;
	private final List<ISearchResult> fCurrentRemoves;

	public HistoryConfigurationDialog(Shell parent, List<ISearchResult> currentList, List<ISearchResult> removedEntries) {
	super(parent);
	fCurrentList= currentList;
	fCurrentRemoves= removedEntries;
	setTitle(SearchMessages.SearchHistorySelectionDialog_history_size_title);
	fHistorySize= SearchPreferencePage.getHistoryLimit();
	setHelpAvailable(false);
	}

	@Override
	protected boolean isResizable() {
	return true;
	}

	/*
	* Overrides method from Dialog
	*/
	@Override
	protected Control createDialogArea(Composite container) {
	Composite ancestor= (Composite) super.createDialogArea(container);
	GridLayout layout= (GridLayout) ancestor.getLayout();
	layout.numColumns= 2;
	ancestor.setLayout(layout);

	Label limitText= new Label(ancestor, SWT.NONE);
	limitText.setText(SearchMessages.SearchHistorySelectionDialog_history_size_description);
	limitText.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));

	fHistorySizeTextField= new Text(ancestor, SWT.BORDER \| SWT.RIGHT);
	fHistorySizeTextField.setTextLimit(2);
	fHistorySizeTextField.setText(String.valueOf(fHistorySize));
	fHistorySizeTextField.addModifyListener(new ModifyListener() {
	@Override
	public void modifyText(ModifyEvent e) {
	validateDialogState();
	}
	});

	GridData gridData= new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1);
	gridData.widthHint= convertWidthInCharsToPixels(6);
	fHistorySizeTextField.setLayoutData(gridData);
	fHistorySizeTextField.setSelection(0, fHistorySizeTextField.getText().length());
	applyDialogFont(ancestor);

	return ancestor;
	}

	@Override
	protected void createButtonsForButtonBar(Composite parent) {
	createButton(parent, DEFAULT_ID, SearchMessages.SearchHistorySelectionDialog_restore_default_button, false);
	super.createButtonsForButtonBar(parent);
	}

	@Override
	protected void buttonPressed(int buttonId) {
	if (buttonId == DEFAULT_ID) {
	IPreferenceStore store= SearchPlugin.getDefault().getPreferenceStore();
	fHistorySizeTextField.setText(store.getDefaultString(SearchPreferencePage.LIMIT_HISTORY));
	validateDialogState();
	}
	super.buttonPressed(buttonId);
	}


	protected final boolean validateDialogState() {
	IStatus status= null;
	try {
	String historySize= fHistorySizeTextField.getText();
	int size= Integer.parseInt(historySize);
	if (size < 1 \|\| size >= 100) {
	status= new Status(IStatus.ERROR, SearchPlugin.getID(), IStatus.ERROR, SearchMessages.SearchHistorySelectionDialog_history_size_error, null);
	} else {
	fHistorySize= size;
	}
	} catch (NumberFormatException e) {
	status= new Status(IStatus.ERROR, SearchPlugin.getID(), IStatus.ERROR, SearchMessages.SearchHistorySelectionDialog_history_size_error, null);
	}
	if (status == null) {
	status= Status.OK_STATUS;
	}
	updateStatus(status);
	return !status.matches(IStatus.ERROR);
	}

	@Override
	protected void okPressed() {
	IPreferenceStore store= SearchPlugin.getDefault().getPreferenceStore();
	store.setValue(SearchPreferencePage.LIMIT_HISTORY, fHistorySize);

	// establish history size
	for (int i= fCurrentList.size() - 1; i >= fHistorySize; i--) {
	fCurrentRemoves.add(fCurrentList.get(i));
	fCurrentList.remove(i);
	}
	super.okPressed();
	}

	}

	private static final class SearchesLabelProvider extends LabelProvider {

	private ArrayList<Image> fImages= new ArrayList<>();

	@Override
	public String getText(Object element) {
	return ((ISearchResult)element).getLabel();
	}

	@Override
	public Image getImage(Object element) {

	ImageDescriptor imageDescriptor= ((ISearchResult)element).getImageDescriptor();
	if (imageDescriptor == null)
	return null;

	Image image= imageDescriptor.createImage();
	fImages.add(image);

	return image;
	}

	@Override
	public void dispose() {
	Iterator<Image> iter= fImages.iterator();
	while (iter.hasNext())
	iter.next().dispose();

	fImages= null;
	}
	}

	public SearchHistorySelectionDialog(Shell parent, List<ISearchResult> input) {
	super(parent);
	setTitle(SearchMessages.SearchesDialog_title);
	setMessage(SearchMessages.SearchesDialog_message);
	fInput= input;
	fRemovedEntries= new ArrayList<>();
	setHelpAvailable(false);
	}

	/**
	* @return the isOpenInNewView
	*/
	public boolean isOpenInNewView() {
	return fIsOpenInNewView;
	}

	@Override
	protected IDialogSettings getDialogBoundsSettings() {
	return SearchPlugin.getDefault().getDialogSettingsSection("DialogBounds_SearchHistorySelectionDialog"); //$NON-NLS-1$
	}

	@Override
	protected int getDialogBoundsStrategy() {
	return DIALOG_PERSISTSIZE;
	}


	/*
	* Overrides method from Dialog
	*/
	@Override
	protected Label createMessageArea(Composite composite) {
	Composite parent= new Composite(composite, SWT.NONE);
	GridLayout layout= new GridLayout();
	layout.numColumns= 2;
	layout.marginHeight= 0;
	layout.marginWidth= 0;
	parent.setLayout(layout);
	parent.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

	Label label = new Label(parent,SWT.WRAP);
	label.setText(getMessage());
	GridData gd= new GridData(GridData.FILL_HORIZONTAL);
	//gd.widthHint= convertWidthInCharsToPixels(WIDTH_IN_CHARACTERS);
	label.setLayoutData(gd);


	applyDialogFont(label);
	return label;
	}



	@Override
	public void create() {
	super.create();

	List<?> initialSelection= getInitialElementSelections();
	if (initialSelection != null)
	fViewer.setSelection(new StructuredSelection(initialSelection));

	validateDialogState();
	}

	/*
	* Overrides method from Dialog
	*/
	@Override
	protected Control createDialogArea(Composite container) {
	Composite ancestor= (Composite) super.createDialogArea(container);

	createMessageArea(ancestor);

	Composite parent= new Composite(ancestor, SWT.NONE);

	GridLayout layout= new GridLayout();
	layout.numColumns= 2;
	layout.marginHeight= 0;
	layout.marginWidth= 0;
	parent.setLayout(layout);
	parent.setLayoutData(new GridData(GridData.FILL_BOTH));

	fViewer= new TableViewer(parent, SWT.MULTI \| SWT.H_SCROLL \| SWT.V_SCROLL \| SWT.BORDER \| SWT.FULL_SELECTION);
	fViewer.setContentProvider(new ArrayContentProvider());

	final Table table= fViewer.getTable();
	table.addMouseListener(new MouseAdapter() {
	@Override
	public void mouseDoubleClick(MouseEvent e) {
	okPressed();
	}
	});
	fViewer.setLabelProvider(new SearchesLabelProvider());
	GridData gd= new GridData(GridData.FILL_BOTH);
	gd.heightHint= convertHeightInCharsToPixels(15);
	gd.widthHint= convertWidthInCharsToPixels(WIDTH_IN_CHARACTERS);
	table.setLayoutData(gd);


	fRemoveButton= new Button(parent, SWT.PUSH);
	fRemoveButton.setText(SearchMessages.SearchesDialog_remove_label);
	fRemoveButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent event) {
	buttonPressed(REMOVE_ID);
	}
	});
	fRemoveButton.setLayoutData(new GridData(GridData.BEGINNING, GridData.BEGINNING, false, false));
	SWTUtil.setButtonDimensionHint(fRemoveButton);

	fViewer.addSelectionChangedListener(new ISelectionChangedListener() {
	@Override
	public void selectionChanged(SelectionChangedEvent event) {
	validateDialogState();
	}
	});

	fLink= new Link(parent, SWT.NONE);
	configureHistoryLink();
	fLink.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	HistoryConfigurationDialog dialog= new HistoryConfigurationDialog(getShell(), fInput, fRemovedEntries);
	if (dialog.open() == Window.OK) {
	fViewer.refresh();
	configureHistoryLink();
	}
	}
	});
	fLink.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false, 2, 1));


	applyDialogFont(ancestor);

	// set input & selections last, so all the widgets are created.
	fViewer.setInput(fInput);
	fViewer.getTable().setFocus();
	return ancestor;
	}

	private void configureHistoryLink() {
	int historyLimit= SearchPreferencePage.getHistoryLimit();
	fLink.setText(Messages.format(SearchMessages.SearchHistorySelectionDialog_configure_link_label, new Integer(historyLimit)));
	}

	protected final void validateDialogState() {
	IStructuredSelection sel= (IStructuredSelection) fViewer.getSelection();
	int elementsSelected= sel.toList().size();

	fRemoveButton.setEnabled(elementsSelected > 0);
	Button okButton= getOkButton();
	if (okButton != null) {
	okButton.setEnabled(elementsSelected == 1);
	}
	Button openInNewButton= getButton(IDialogConstants.OPEN_ID);
	if (openInNewButton != null) {
	openInNewButton.setEnabled(elementsSelected == 1);
	}
	}

	@Override
	protected void createButtonsForButtonBar(Composite parent) {
	createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OPEN_LABEL, true);
	createButton(parent, IDialogConstants.OPEN_ID, SearchMessages.SearchHistorySelectionDialog_open_in_new_button, false);
	createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);
	}


	@Override
	protected void buttonPressed(int buttonId) {
	if (buttonId == REMOVE_ID) {
	IStructuredSelection selection= (IStructuredSelection) fViewer.getSelection();
	Iterator<?> searchResults= selection.iterator();
	while (searchResults.hasNext()) {
	ISearchResult curr= (ISearchResult) searchResults.next();
	fRemovedEntries.add(curr);
	fInput.remove(curr);
	fViewer.remove(curr);
	}
	if (fViewer.getSelection().isEmpty() && !fInput.isEmpty()) {
	fViewer.setSelection(new StructuredSelection(fInput.get(0)));
	}
	return;
	}
	if (buttonId == IDialogConstants.OPEN_ID) {
	fIsOpenInNewView= true;
	buttonId= IDialogConstants.OK_ID;
	}
	super.buttonPressed(buttonId);
	}

	/*
	* Overrides method from Dialog
	*/
	@Override
	protected void okPressed() {
	// Build a list of selected children.
	ISelection selection= fViewer.getSelection();
	if (selection instanceof IStructuredSelection)
	setResult(((IStructuredSelection) fViewer.getSelection()).toList());

	// remove queries
	for (Iterator<ISearchResult> iter= fRemovedEntries.iterator(); iter.hasNext();) {
	ISearchResult result= iter.next();
	ISearchQuery query= result.getQuery();
	if (query != null) { // must not be null: invalid implementation of a search query
	InternalSearchUI.getInstance().removeQuery(query);
	}
	}
	super.okPressed();
	}
	}