EDIT

// $Id$

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.taxeditor.bulkeditor;

import java.util.Comparator;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.FocusEvent;

import org.eclipse.swt.events.FocusListener;

import org.eclipse.swt.events.KeyAdapter;

import org.eclipse.swt.events.KeyEvent;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

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.Label;

import org.eclipse.swt.widgets.Text;

import org.eclipse.ui.PlatformUI;

import org.eclipse.ui.swt.IFocusService;

import eu.etaxonomy.cdm.common.CdmUtils;

import eu.etaxonomy.taxeditor.preference.Resources;

import eu.etaxonomy.taxeditor.store.SearchManager;

/**

 * @author p.ciardelli

 * @author e.-m.lee

 * @author n.hoffmann

 * @created 17.08.2009

 * @version 1.0

 */

public class BulkEditorSearch {

	private static final String SEARCH = "Search";

	private static final String DEFAULT_TEXT = String.format("Use \'%s\' for wildcard searching", SearchManager.WILDCARD);

	private final BulkEditor editor;

	private Text text;

	private BulkEditorSortCombo sortCombo;

	private Button button;

	public Object ORDER_BY = new Object();

	public BulkEditorSearch(BulkEditor editor, Composite parent, int style) {

		this.editor = editor;

		createControl(parent, style);

	}

	/**

	 * Creates the search control.

	 */

	protected void createControl(Composite parent, int style) {

		final Composite container = new Composite(parent, style);

		GridData gridData = new GridData(SWT.FILL, SWT.TOP, true, false);

		container.setLayoutData(gridData);

		container.setLayout(new GridLayout(5, false));

		createSearchTextField(container, SWT.BORDER | SWT.SINGLE | SWT.FULL_SELECTION);

		createSortCombo(container, style);

		button = new Button(container, SWT.PUSH);

		button.setText(SEARCH);

		button.addSelectionListener(new SelectionAdapter() {

			@Override

			public void widgetSelected(SelectionEvent e) {

				updateEditorInput();

			}

		});

		registerAtFocusService();

	}

	private void createSortCombo(Composite parent, int style) {

		sortCombo = new BulkEditorSortCombo(parent, editor.getEditorInput().getSortProviders());

	}

	/**

	 * Handles focus changes for the textfield.

	 */

	private void registerAtFocusService() {

		IFocusService focusService =

			(IFocusService) PlatformUI.getWorkbench().getService(IFocusService.class);

		if (focusService != null) {

			focusService.addFocusTracker(text, "bulkeditor.textControlId");

		}

	}

	/**

	 * Creates the search textfield.

	 */

	private void createSearchTextField(Composite parent, int style) {

		final Label label = new Label(parent, SWT.NONE);

		label.setText("Title Cache");

		text = new Text(parent, style);

		text.setText(DEFAULT_TEXT);

		text.setForeground(BulkEditorUtil.getColor(Resources.SEARCH_VIEW_FOREGROUND));

		text.addFocusListener(new FocusListener() {

			@Override

            public void focusGained(FocusEvent e) {

				text.setForeground(BulkEditorUtil.getColor(Resources.SEARCH_VIEW_FOCUS));

				if (DEFAULT_TEXT.equals(text.getText())) {

					text.setText("");

				}

			}

			@Override

            public void focusLost(FocusEvent e) {

				if (CdmUtils.isEmpty(text.getText())) {

					text.setForeground(BulkEditorUtil.getColor(Resources.SEARCH_VIEW_FOREGROUND));

					text.setText(DEFAULT_TEXT);

				}

			}

		});

		text.addKeyListener(new KeyAdapter() {

			@Override

			public void keyReleased(KeyEvent e) {

				if (e.keyCode == SWT.CR) {

					updateEditorInput();

				}

			}

		});

		GridData gridData = new GridData(SWT.FILL, SWT.CENTER, true, false);

		text.setLayoutData(gridData);

	}

	/**

	 * Shows the results of the search.

	 */

	private void updateEditorInput() {

		String searchString = getSearchString().trim();

		if(DEFAULT_TEXT.equals(searchString) || CdmUtils.isBlank(searchString)){

			return;

		}

		BulkEditorQuery query = new BulkEditorQuery(searchString, getComparator());

		editor.performSearch(query);

	}

	/**

	 * Returns the current string in the search textfield.

	 * @return the content of the textfield

	 */

	public String getSearchString() {

		return text.getText().trim();

	}

	public Comparator getComparator() {

		return sortCombo.getSelection();

	}

	public void setFocus() {

		if(text != null && ! text.isDisposed()){

			text.setFocus();

		}

	}

}