java/maven/src/org/netbeans/modules/maven/TextValueCompleter.java - netbeans - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License.  You may obtain a copy of the License at
  *
  *   http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  * KIND, either express or implied.  See the License for the
  * specific language governing permissions and limitations
  * under the License.
  */

 package org.netbeans.modules.maven;

 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.FocusAdapter;
 import java.awt.event.FocusEvent;
 import java.awt.event.KeyEvent;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.util.Collection;
 import java.util.StringTokenizer;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import javax.swing.AbstractAction;
 import javax.swing.DefaultListModel;
 import javax.swing.JList;
 import javax.swing.JScrollPane;
 import javax.swing.JTextField;
 import javax.swing.KeyStroke;
 import javax.swing.ListSelectionModel;
 import javax.swing.Popup;
 import javax.swing.PopupFactory;
 import javax.swing.ScrollPaneConstants;
 import javax.swing.SwingUtilities;
 import javax.swing.Timer;
 import javax.swing.event.CaretEvent;
 import javax.swing.event.CaretListener;
 import javax.swing.event.DocumentEvent;
 import javax.swing.event.DocumentListener;
 import org.openide.util.NbBundle;

 /**
  * inner class does the matching of the JTextField's
  * document to completion strings kept in an ArrayList
  * @author mkleint
  */

 public class TextValueCompleter implements DocumentListener {
     private static final String ACTION_FILLIN = "fill-in"; //NOI18N
     private static final String ACTION_HIDEPOPUP = "hidepopup"; //NOI18N
     private static final String ACTION_LISTDOWN = "listdown"; //NOI18N
     private static final String ACTION_LISTPAGEDOWN = "listpagedown"; //NOI18N
     private static final String ACTION_LISTUP = "listup"; //NOI18N
     private static final String ACTION_LISTPAGEUP = "listpageup"; //NOI18N
     private static final String ACTION_SHOWPOPUP = "showpopup"; //NOI18N
     private Pattern pattern;
     private Collection<String> completions;
     private JList completionList;
     private DefaultListModel<String> completionListModel;
     private JScrollPane listScroller;
     private Popup popup;
     private JTextField field;
     private String separators;
     private CaretListener caretListener;

     private boolean loading;
     private static final String LOADING = Bundle.LBL_Loading();
     private boolean partial;

     public TextValueCompleter(Collection<String> completions, JTextField fld) {
         this.completions = completions;
         this.field = fld;
         field.getDocument().addDocumentListener(this);
         field.addFocusListener(new FocusAdapter() {
             @Override
             public void focusLost(FocusEvent e) {
                 hidePopup();
             }
         });
         caretListener = new CaretListener() {
             @Override
             public void caretUpdate(CaretEvent arg0) {
                 // only consider caret updates if the popup window is visible
                 if (completionList.isDisplayable() && completionList.isVisible()) {
                     buildAndShowPopup();
                 }
             }
         };
         field.addCaretListener(caretListener);
         completionListModel = new DefaultListModel<>();
         completionList = new JList(completionListModel);
         completionList.setFocusable(false);
         completionList.setPrototypeCellValue("lets have it at least this wide and add some more just in case"); //NOI18N
         completionList.addMouseListener(new MouseAdapter() {
             @Override
             public void mouseClicked(MouseEvent e) {
                 if (e.getClickCount() > 1) {
                     if (LOADING.endsWith(completionList.getSelectedValue().toString())) {
                         return;
                     }
                     field.getDocument().removeDocumentListener(TextValueCompleter.this);
                     applyCompletion(completionList.getSelectedValue().toString());
                     hidePopup();
                     field.getDocument().addDocumentListener(TextValueCompleter.this);
                 }
             }
         });
         completionList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
         listScroller =new JScrollPane(completionList,
                 ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
                 ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
         listScroller.setFocusable(false);
         field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0),ACTION_LISTDOWN);
         field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0),ACTION_LISTUP);
         field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_UP, 0),ACTION_LISTPAGEUP);
         field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0),ACTION_LISTPAGEDOWN);
         field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, KeyEvent.CTRL_DOWN_MASK),ACTION_SHOWPOPUP);
         field.getActionMap().put(ACTION_LISTDOWN, new AbstractAction() { //NOI18N
             @Override
             public void actionPerformed(ActionEvent e) {
                 if (popup == null) {
                     buildAndShowPopup(0);
                 }
                 completionList.setSelectedIndex(Math.min(completionList.getSelectedIndex() + 1, completionList.getModel().getSize()));
                 completionList.ensureIndexIsVisible(completionList.getSelectedIndex());
             }
         });
         field.getActionMap().put(ACTION_LISTUP,  new AbstractAction() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 if (popup == null) {
                     buildAndShowPopup(0);
                 }
                 completionList.setSelectedIndex(Math.max(completionList.getSelectedIndex() - 1, 0));
                 completionList.ensureIndexIsVisible(completionList.getSelectedIndex());
             }
         });
         field.getActionMap().put(ACTION_LISTPAGEDOWN, new AbstractAction() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 completionList.setSelectedIndex(Math.min(completionList.getSelectedIndex() + completionList.getVisibleRowCount(), completionList.getModel().getSize()));
                 completionList.ensureIndexIsVisible(completionList.getSelectedIndex());
             }
         });
         field.getActionMap().put(ACTION_LISTPAGEUP, new AbstractAction() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 completionList.setSelectedIndex(Math.max(completionList.getSelectedIndex() - completionList.getVisibleRowCount(), 0));
                 completionList.ensureIndexIsVisible(completionList.getSelectedIndex());
             }
         });
         field.getActionMap().put(ACTION_FILLIN, new AbstractAction() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 Object selVal = completionList.getSelectedValue();
                 if (selVal != null && LOADING.endsWith(selVal.toString())) {
                     return;
                 }
                 field.getDocument().removeDocumentListener(TextValueCompleter.this);
                 if (selVal != null) {
                     applyCompletion(selVal.toString());
                 }
                 hidePopup();
                 field.getDocument().addDocumentListener(TextValueCompleter.this);
             }
         });
         field.getActionMap().put(ACTION_HIDEPOPUP, new AbstractAction() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 hidePopup();
             }
         });
         field.getActionMap().put(ACTION_SHOWPOPUP, new AbstractAction() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 buildAndShowPopup();
             }
         });
     }

     public TextValueCompleter(Collection<String> completions, JTextField fld, String separators) {
         this(completions, fld);
         this.separators = separators;
     }

     public boolean isLoading() {
         return loading;
     }

     public void setLoading(boolean loading) {
         this.loading = loading;
         if (loading) {
           completionListModel.removeAllElements();
           completionListModel.addElement(LOADING);
         } else {
           completionListModel.removeElement(LOADING);
         }
     }


     @NbBundle.Messages("PARTIAL_RESULT=<Result is incomplete, some indices are processed>")
     private void buildPopup() {
         pattern = Pattern.compile(getCompletionPrefix() + ".+"); //NOI18N
         int entryindex = 0;
         for (String completion : completions) {
             // check if match
             Matcher matcher = pattern.matcher(completion);
             if (matcher.matches()) {
                 if (!completionListModel.contains(completion)) {
                     completionListModel.add(entryindex,
                             completion);
                 }
                 entryindex++;
             } else {
                 completionListModel.removeElement(completion);
             }
         }
         completionListModel.removeElement(Bundle.PARTIAL_RESULT());
         if (partial) {
             completionListModel.addElement(Bundle.PARTIAL_RESULT());
         }
     }

     private void applyCompletion(String completed) {
         field.removeCaretListener(caretListener);
         if (separators != null) {
             int pos = field.getCaretPosition();
             String currentText = field.getText();
              int caretPosition=0;
             StringTokenizer tok = new StringTokenizer(currentText, separators, true);
            int tokens =tok.countTokens();
             int count = 0;
             String newValue = ""; //NOI18N
             while (tok.hasMoreTokens()) {
                 String token = tok.nextToken();
                 if (count + token.length() >= pos) {
                     if (separators.indexOf(token.charAt(0)) != -1) {
                         newValue = newValue + token;
                     }
                     newValue = newValue + completed+separators;
                      caretPosition=newValue.length();
                     while (tok.hasMoreTokens()) {
                         newValue = newValue + tok.nextToken();
                     }
                     field.setText(newValue);

                     field.setCaretPosition(caretPosition);
                     field.addCaretListener(caretListener);
                     return;
                 } else {
                     count = count + token.length();
                     newValue = newValue + token;
                 }
             }
             newValue = newValue + completed+separators;
             field.setText(newValue);
             field.setCaretPosition(newValue.length());
         } else {
             field.setText(completed);
         }
         field.addCaretListener(caretListener);
     }

     private String getCompletionPrefix() {
         if (separators != null) {
             int pos = field.getCaretPosition();
             String currentText = field.getText();
             StringTokenizer tok = new StringTokenizer(currentText, separators, true);
             int count = 0;
             String lastToken = ""; //NOI18N
             while (tok.hasMoreTokens()) {
                 String token = tok.nextToken();
                 if (count + token.length() >= pos) {
                     if (separators.indexOf(token.charAt(0)) != -1) {
                         return ""; //NOI18N
                     }
                     return Pattern.quote(token.substring(0, pos - count));
                 } else {
                     count = count + token.length();
                     lastToken = token;
                 }
             }
             if (lastToken.length() > 0 && separators.indexOf(lastToken.charAt(0)) == -1) {
                 return Pattern.quote(lastToken);
             }
             return ""; //NOI18N
         } else {
             return Pattern.quote(field.getText().trim());
         }
     }

     private void showPopup() {
         hidePopup();
         if (completionListModel.getSize() == 0) {
             return;
         }
         // figure out where the text field is,
         // and where its bottom left is
         java.awt.Point los = field.getLocationOnScreen();
         int popX = los.x;
         int popY = los.y + field.getHeight();
         popup = PopupFactory.getSharedInstance().getPopup(field, listScroller, popX, popY);
         field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0),ACTION_HIDEPOPUP);
         field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0),ACTION_FILLIN);
         popup.show();
         if (completionList.getSelectedIndex() != -1) {
             completionList.ensureIndexIsVisible(completionList.getSelectedIndex());
         }
     }

     private void hidePopup() {
         field.getInputMap().remove(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0));
         field.getInputMap().remove(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0));
         if (popup != null) {
             popup.hide();
             popup = null;
         }
     }

     private class BuildTimer extends Timer {
         private static final int DEFAULT_DELAY = 400;
         public BuildTimer() {
             super(DEFAULT_DELAY, new ActionListener() {
                 @Override
                 public void actionPerformed(ActionEvent e) {
                     if(!field.isShowing()) {
                         // became closed in the meantime
                         return;
                     }
                     buildPopup();
                     showPopup();
                 }
             });
             setRepeats(false);
         }
     };

     private final BuildTimer buildTimer = new BuildTimer();

     private void buildAndShowPopup() {
         buildAndShowPopup(BuildTimer.DEFAULT_DELAY);
     }

     private void buildAndShowPopup(int delay) {
         buildTimer.setInitialDelay(delay);
         buildTimer.restart();
     }

     // DocumentListener implementation
     @Override
     public void insertUpdate(DocumentEvent e) {
         if (field.isFocusOwner()) {
             buildAndShowPopup();
         }
     }
     @Override
     public void removeUpdate(DocumentEvent e) {
         if (field.isFocusOwner() && completionList.isDisplayable() && completionList.isVisible()) {
             buildAndShowPopup();
         }
     }
     @Override
     public void changedUpdate(DocumentEvent e) {
         if (field.isFocusOwner()) {
             buildAndShowPopup();
         }
     }

     public void setValueList(Collection<String> values, boolean partial) {
         assert SwingUtilities.isEventDispatchThread();
         completionListModel.removeAllElements();
         completions = values;
         this.partial = partial;
         if (field.isFocusOwner() && completionList.isDisplayable() && completionList.isVisible()) {
             buildAndShowPopup();
         }
     }
 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*/

	package org.netbeans.modules.maven;

	import java.awt.event.ActionEvent;
	import java.awt.event.ActionListener;
	import java.awt.event.FocusAdapter;
	import java.awt.event.FocusEvent;
	import java.awt.event.KeyEvent;
	import java.awt.event.MouseAdapter;
	import java.awt.event.MouseEvent;
	import java.util.Collection;
	import java.util.StringTokenizer;
	import java.util.regex.Matcher;
	import java.util.regex.Pattern;
	import javax.swing.AbstractAction;
	import javax.swing.DefaultListModel;
	import javax.swing.JList;
	import javax.swing.JScrollPane;
	import javax.swing.JTextField;
	import javax.swing.KeyStroke;
	import javax.swing.ListSelectionModel;
	import javax.swing.Popup;
	import javax.swing.PopupFactory;
	import javax.swing.ScrollPaneConstants;
	import javax.swing.SwingUtilities;
	import javax.swing.Timer;
	import javax.swing.event.CaretEvent;
	import javax.swing.event.CaretListener;
	import javax.swing.event.DocumentEvent;
	import javax.swing.event.DocumentListener;
	import org.openide.util.NbBundle;

	/**
	* inner class does the matching of the JTextField's
	* document to completion strings kept in an ArrayList
	* @author mkleint
	*/

	public class TextValueCompleter implements DocumentListener {
	private static final String ACTION_FILLIN = "fill-in"; //NOI18N
	private static final String ACTION_HIDEPOPUP = "hidepopup"; //NOI18N
	private static final String ACTION_LISTDOWN = "listdown"; //NOI18N
	private static final String ACTION_LISTPAGEDOWN = "listpagedown"; //NOI18N
	private static final String ACTION_LISTUP = "listup"; //NOI18N
	private static final String ACTION_LISTPAGEUP = "listpageup"; //NOI18N
	private static final String ACTION_SHOWPOPUP = "showpopup"; //NOI18N
	private Pattern pattern;
	private Collection<String> completions;
	private JList completionList;
	private DefaultListModel<String> completionListModel;
	private JScrollPane listScroller;
	private Popup popup;
	private JTextField field;
	private String separators;
	private CaretListener caretListener;

	private boolean loading;
	private static final String LOADING = Bundle.LBL_Loading();
	private boolean partial;

	public TextValueCompleter(Collection<String> completions, JTextField fld) {
	this.completions = completions;
	this.field = fld;
	field.getDocument().addDocumentListener(this);
	field.addFocusListener(new FocusAdapter() {
	@Override
	public void focusLost(FocusEvent e) {
	hidePopup();
	}
	});
	caretListener = new CaretListener() {
	@Override
	public void caretUpdate(CaretEvent arg0) {
	// only consider caret updates if the popup window is visible
	if (completionList.isDisplayable() && completionList.isVisible()) {
	buildAndShowPopup();
	}
	}
	};
	field.addCaretListener(caretListener);
	completionListModel = new DefaultListModel<>();
	completionList = new JList(completionListModel);
	completionList.setFocusable(false);
	completionList.setPrototypeCellValue("lets have it at least this wide and add some more just in case"); //NOI18N
	completionList.addMouseListener(new MouseAdapter() {
	@Override
	public void mouseClicked(MouseEvent e) {
	if (e.getClickCount() > 1) {
	if (LOADING.endsWith(completionList.getSelectedValue().toString())) {
	return;
	}
	field.getDocument().removeDocumentListener(TextValueCompleter.this);
	applyCompletion(completionList.getSelectedValue().toString());
	hidePopup();
	field.getDocument().addDocumentListener(TextValueCompleter.this);
	}
	}
	});
	completionList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
	listScroller =new JScrollPane(completionList,
	ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
	ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
	listScroller.setFocusable(false);
	field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0),ACTION_LISTDOWN);
	field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0),ACTION_LISTUP);
	field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_UP, 0),ACTION_LISTPAGEUP);
	field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0),ACTION_LISTPAGEDOWN);
	field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, KeyEvent.CTRL_DOWN_MASK),ACTION_SHOWPOPUP);
	field.getActionMap().put(ACTION_LISTDOWN, new AbstractAction() { //NOI18N
	@Override
	public void actionPerformed(ActionEvent e) {
	if (popup == null) {
	buildAndShowPopup(0);
	}
	completionList.setSelectedIndex(Math.min(completionList.getSelectedIndex() + 1, completionList.getModel().getSize()));
	completionList.ensureIndexIsVisible(completionList.getSelectedIndex());
	}
	});
	field.getActionMap().put(ACTION_LISTUP, new AbstractAction() {
	@Override
	public void actionPerformed(ActionEvent e) {
	if (popup == null) {
	buildAndShowPopup(0);
	}
	completionList.setSelectedIndex(Math.max(completionList.getSelectedIndex() - 1, 0));
	completionList.ensureIndexIsVisible(completionList.getSelectedIndex());
	}
	});
	field.getActionMap().put(ACTION_LISTPAGEDOWN, new AbstractAction() {
	@Override
	public void actionPerformed(ActionEvent e) {
	completionList.setSelectedIndex(Math.min(completionList.getSelectedIndex() + completionList.getVisibleRowCount(), completionList.getModel().getSize()));
	completionList.ensureIndexIsVisible(completionList.getSelectedIndex());
	}
	});
	field.getActionMap().put(ACTION_LISTPAGEUP, new AbstractAction() {
	@Override
	public void actionPerformed(ActionEvent e) {
	completionList.setSelectedIndex(Math.max(completionList.getSelectedIndex() - completionList.getVisibleRowCount(), 0));
	completionList.ensureIndexIsVisible(completionList.getSelectedIndex());
	}
	});
	field.getActionMap().put(ACTION_FILLIN, new AbstractAction() {
	@Override
	public void actionPerformed(ActionEvent e) {
	Object selVal = completionList.getSelectedValue();
	if (selVal != null && LOADING.endsWith(selVal.toString())) {
	return;
	}
	field.getDocument().removeDocumentListener(TextValueCompleter.this);
	if (selVal != null) {
	applyCompletion(selVal.toString());
	}
	hidePopup();
	field.getDocument().addDocumentListener(TextValueCompleter.this);
	}
	});
	field.getActionMap().put(ACTION_HIDEPOPUP, new AbstractAction() {
	@Override
	public void actionPerformed(ActionEvent e) {
	hidePopup();
	}
	});
	field.getActionMap().put(ACTION_SHOWPOPUP, new AbstractAction() {
	@Override
	public void actionPerformed(ActionEvent e) {
	buildAndShowPopup();
	}
	});
	}

	public TextValueCompleter(Collection<String> completions, JTextField fld, String separators) {
	this(completions, fld);
	this.separators = separators;
	}

	public boolean isLoading() {
	return loading;
	}

	public void setLoading(boolean loading) {
	this.loading = loading;
	if (loading) {
	completionListModel.removeAllElements();
	completionListModel.addElement(LOADING);
	} else {
	completionListModel.removeElement(LOADING);
	}
	}


	@NbBundle.Messages("PARTIAL_RESULT=<Result is incomplete, some indices are processed>")
	private void buildPopup() {
	pattern = Pattern.compile(getCompletionPrefix() + ".+"); //NOI18N
	int entryindex = 0;
	for (String completion : completions) {
	// check if match
	Matcher matcher = pattern.matcher(completion);
	if (matcher.matches()) {
	if (!completionListModel.contains(completion)) {
	completionListModel.add(entryindex,
	completion);
	}
	entryindex++;
	} else {
	completionListModel.removeElement(completion);
	}
	}
	completionListModel.removeElement(Bundle.PARTIAL_RESULT());
	if (partial) {
	completionListModel.addElement(Bundle.PARTIAL_RESULT());
	}
	}

	private void applyCompletion(String completed) {
	field.removeCaretListener(caretListener);
	if (separators != null) {
	int pos = field.getCaretPosition();
	String currentText = field.getText();
	int caretPosition=0;
	StringTokenizer tok = new StringTokenizer(currentText, separators, true);
	int tokens =tok.countTokens();
	int count = 0;
	String newValue = ""; //NOI18N
	while (tok.hasMoreTokens()) {
	String token = tok.nextToken();
	if (count + token.length() >= pos) {
	if (separators.indexOf(token.charAt(0)) != -1) {
	newValue = newValue + token;
	}
	newValue = newValue + completed+separators;
	caretPosition=newValue.length();
	while (tok.hasMoreTokens()) {
	newValue = newValue + tok.nextToken();
	}
	field.setText(newValue);

	field.setCaretPosition(caretPosition);
	field.addCaretListener(caretListener);
	return;
	} else {
	count = count + token.length();
	newValue = newValue + token;
	}
	}
	newValue = newValue + completed+separators;
	field.setText(newValue);
	field.setCaretPosition(newValue.length());
	} else {
	field.setText(completed);
	}
	field.addCaretListener(caretListener);
	}

	private String getCompletionPrefix() {
	if (separators != null) {
	int pos = field.getCaretPosition();
	String currentText = field.getText();
	StringTokenizer tok = new StringTokenizer(currentText, separators, true);
	int count = 0;
	String lastToken = ""; //NOI18N
	while (tok.hasMoreTokens()) {
	String token = tok.nextToken();
	if (count + token.length() >= pos) {
	if (separators.indexOf(token.charAt(0)) != -1) {
	return ""; //NOI18N
	}
	return Pattern.quote(token.substring(0, pos - count));
	} else {
	count = count + token.length();
	lastToken = token;
	}
	}
	if (lastToken.length() > 0 && separators.indexOf(lastToken.charAt(0)) == -1) {
	return Pattern.quote(lastToken);
	}
	return ""; //NOI18N
	} else {
	return Pattern.quote(field.getText().trim());
	}
	}

	private void showPopup() {
	hidePopup();
	if (completionListModel.getSize() == 0) {
	return;
	}
	// figure out where the text field is,
	// and where its bottom left is
	java.awt.Point los = field.getLocationOnScreen();
	int popX = los.x;
	int popY = los.y + field.getHeight();
	popup = PopupFactory.getSharedInstance().getPopup(field, listScroller, popX, popY);
	field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0),ACTION_HIDEPOPUP);
	field.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0),ACTION_FILLIN);
	popup.show();
	if (completionList.getSelectedIndex() != -1) {
	completionList.ensureIndexIsVisible(completionList.getSelectedIndex());
	}
	}

	private void hidePopup() {
	field.getInputMap().remove(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0));
	field.getInputMap().remove(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0));
	if (popup != null) {
	popup.hide();
	popup = null;
	}
	}

	private class BuildTimer extends Timer {
	private static final int DEFAULT_DELAY = 400;
	public BuildTimer() {
	super(DEFAULT_DELAY, new ActionListener() {
	@Override
	public void actionPerformed(ActionEvent e) {
	if(!field.isShowing()) {
	// became closed in the meantime
	return;
	}
	buildPopup();
	showPopup();
	}
	});
	setRepeats(false);
	}
	};

	private final BuildTimer buildTimer = new BuildTimer();

	private void buildAndShowPopup() {
	buildAndShowPopup(BuildTimer.DEFAULT_DELAY);
	}

	private void buildAndShowPopup(int delay) {
	buildTimer.setInitialDelay(delay);
	buildTimer.restart();
	}

	// DocumentListener implementation
	@Override
	public void insertUpdate(DocumentEvent e) {
	if (field.isFocusOwner()) {
	buildAndShowPopup();
	}
	}
	@Override
	public void removeUpdate(DocumentEvent e) {
	if (field.isFocusOwner() && completionList.isDisplayable() && completionList.isVisible()) {
	buildAndShowPopup();
	}
	}
	@Override
	public void changedUpdate(DocumentEvent e) {
	if (field.isFocusOwner()) {
	buildAndShowPopup();
	}
	}

	public void setValueList(Collection<String> values, boolean partial) {
	assert SwingUtilities.isEventDispatchThread();
	completionListModel.removeAllElements();
	completions = values;
	this.partial = partial;
	if (field.isFocusOwner() && completionList.isDisplayable() && completionList.isVisible()) {
	buildAndShowPopup();
	}
	}
	}