plugins/ldapbrowser.common/src/main/java/org/apache/directory/studio/ldapbrowser/common/widgets/ModWidget.java - directory-studio - 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.apache.directory.studio.ldapbrowser.common.widgets;


 import java.util.ArrayList;
 import java.util.Arrays;

 import org.apache.directory.studio.common.ui.widgets.AbstractWidget;
 import org.apache.directory.studio.common.ui.widgets.BaseWidgetUtils;
 import org.apache.directory.studio.connection.ui.widgets.ExtendedContentAssistCommandAdapter;
 import org.apache.directory.studio.ldapbrowser.core.BrowserCoreConstants;
 import org.apache.directory.studio.ldapbrowser.core.model.schema.Schema;
 import org.apache.directory.studio.ldapbrowser.core.model.schema.SchemaUtils;
 import org.eclipse.jface.fieldassist.ComboContentAdapter;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.ScrolledComposite;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 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.Combo;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Group;
 import org.eclipse.swt.widgets.Text;


 /**
  * The ModWidget provides input elements to define an LDAP modify
  * operation.
  *
  * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
  */
 public class ModWidget extends AbstractWidget
 {
     /** The scrolled composite */
     private ScrolledComposite scrolledComposite;

     /** The composite that contains the ModSpecs */
     private Composite composite;

     /** The list of ModSpecs */
     private ArrayList<ModSpec> modSpecList = new ArrayList<ModSpec>();

     /** The list content proposal provider */
     private ListContentProposalProvider listContentProposalProvider;

     /** The resulting LDIF */
     private String ldif;

     // Listeners
     private ModifyListener modifyListener = new ModifyListener()
     {
         public void modifyText( ModifyEvent e )
         {
             validate( true );
         }
     };


     /**
      * Creates a new instance of ModWidget.
      *
      * @param schema the schema with the possible attribute types
      */
     public ModWidget( Schema schema )
     {
         String[] attributeDescriptions = SchemaUtils.getNamesAsArray( schema.getAttributeTypeDescriptions() );
         Arrays.sort( attributeDescriptions );
         listContentProposalProvider = new ListContentProposalProvider( attributeDescriptions );
     }


     /**
      * Disposes this widget.
      */
     public void dispose()
     {
     }


     /**
      * Gets the ldif.
      *
      * @return the ldif
      */
     public String getLdif()
     {
         return ldif;
     }


     /**
      * Creates the contents.
      *
      * @param parent the parent composite
      *
      * @return the created composite
      */
     public Composite createContents( Composite parent )
     {
         // Creating the scrolled composite containing all UI
         scrolledComposite = new ScrolledComposite( parent, SWT.H_SCROLL | SWT.V_SCROLL );
         scrolledComposite.setLayout( new GridLayout() );
         scrolledComposite.setExpandHorizontal( true );
         scrolledComposite.setLayoutData( new GridData( SWT.FILL, SWT.FILL, true, true ) );

         // Creating the composite
         composite = BaseWidgetUtils.createColumnContainer( scrolledComposite, 3, 1 );
         composite.setLayoutData( new GridData( SWT.FILL, SWT.FILL, true, true ) );
         scrolledComposite.setContent( composite );

         addInitialModSpec();

         validate( false );

         return scrolledComposite;
     }


     /**
      * Validates the input elements.
      */
     public void validate( boolean notifyListeners )
     {
         for ( int i = 0; i < modSpecList.size(); i++ )
         {
             ModSpec modSpec = ( ModSpec ) modSpecList.get( i );
             if ( modSpecList.size() > 1 )
             {
                 modSpec.modDeleteButton.setEnabled( true );
             }
             else
             {
                 modSpec.modDeleteButton.setEnabled( false );
             }
             for ( int k = 0; k < modSpec.valueLineList.size(); k++ )
             {
                 ValueLine valueLine = ( ValueLine ) modSpec.valueLineList.get( k );
                 if ( modSpec.valueLineList.size() > 1 )
                 {
                     valueLine.valueDeleteButton.setEnabled( true );
                 }
                 else
                 {
                     valueLine.valueDeleteButton.setEnabled( false );
                 }
             }
         }

         if ( notifyListeners )
         {
             notifyListeners();
         }
     }


     /**
      * Adds an initial modification spec.
      *
      */
     private void addInitialModSpec()
     {
         addModSpec( 0 );
     }


     /**
      * Adds a modification spec at the given index.
      *
      * @param index the index
      */
     private void addModSpec( int index )
     {
         // Getting the array of modification specs
         ModSpec[] modSpecs = ( ModSpec[] ) modSpecList.toArray( new ModSpec[modSpecList.size()] );

         // Adding a new modification spec
         ModSpec newModSpec = createModSpec( true );
         modSpecList.add( newModSpec );

         if ( modSpecs.length > 0 )
         {
             for ( int i = index; i < modSpecs.length; i++ )
             {
                 ModSpec modSpec = modSpecs[i];

                 // That's a trick to relocate the modification spec
                 // beneath the newly created one
                 modSpec.modGroup.setParent( scrolledComposite );
                 modSpec.modAddButton.setParent( scrolledComposite );
                 modSpec.modDeleteButton.setParent( scrolledComposite );
                 modSpec.modGroup.setParent( composite );
                 modSpec.modAddButton.setParent( composite );
                 modSpec.modDeleteButton.setParent( composite );

                 // Same trick to update the id in the list
                 modSpecList.remove( modSpec );
                 modSpecList.add( modSpec );
             }
         }

         composite.setSize( composite.computeSize( SWT.DEFAULT, SWT.DEFAULT ) );
     }


     /**
      * Creates and returns a modification spec.
      *
      * @param addFirstValueLine if a first value line should added
      * @return the created modification spec
      */
     private ModSpec createModSpec( boolean addFirstValueLine )
     {
         ModSpec modSpec = new ModSpec();

         modSpec.modGroup = BaseWidgetUtils.createGroup( composite, "", 1 ); //$NON-NLS-1$
         modSpec.modGroup.setLayoutData( new GridData( SWT.FILL, SWT.NONE, true, false ) );
         Composite modSpecComposite = BaseWidgetUtils.createColumnContainer( modSpec.modGroup, 2, 1 );
         modSpec.modType = BaseWidgetUtils.createReadonlyCombo( modSpecComposite, new String[]
             { "add", "replace", "delete" }, 0, 1 ); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
         modSpec.modType.setLayoutData( new GridData() );
         modSpec.modType.addModifyListener( modifyListener );

         // attribute combo with field decoration and content proposal
         modSpec.modAttributeCombo = BaseWidgetUtils.createCombo( modSpecComposite, new String[0], -1, 1 );
         new ExtendedContentAssistCommandAdapter( modSpec.modAttributeCombo, new ComboContentAdapter(),
             listContentProposalProvider, null, null, true );
         modSpec.modAttributeCombo.addModifyListener( modifyListener );

         // add button with listener
         modSpec.modAddButton = new Button( composite, SWT.PUSH );
         modSpec.modAddButton.setText( "  +   " ); //$NON-NLS-1$
         modSpec.modAddButton.addSelectionListener( new SelectionAdapter()
         {
             public void widgetSelected( SelectionEvent e )
             {
                 int index = modSpecList.size();
                 for ( int i = 0; i < modSpecList.size(); i++ )
                 {
                     ModSpec modSpec = modSpecList.get( i );
                     if ( modSpec.modAddButton == e.widget )
                     {
                         index = i + 1;
                     }
                 }

                 addModSpec( index );

                 validate( true );
             }
         } );

         // delete button with listener
         modSpec.modDeleteButton = new Button( composite, SWT.PUSH );
         modSpec.modDeleteButton.setText( "  \u2212  " ); //$NON-NLS-1$
         modSpec.modDeleteButton.addSelectionListener( new SelectionAdapter()
         {
             public void widgetSelected( SelectionEvent e )
             {
                 int index = 0;
                 for ( int i = 0; i < modSpecList.size(); i++ )
                 {
                     ModSpec modSpec = modSpecList.get( i );
                     if ( modSpec.modDeleteButton == e.widget )
                     {
                         index = i;
                     }
                 }

                 deleteModSpec( index );

                 validate( true );
             }
         } );

         if ( addFirstValueLine )
         {
             addValueLine( modSpec, 0, false );
         }

         return modSpec;
     }


     /**
      * Delets a modification spec.
      *
      * @param index the index
      */
     private void deleteModSpec( int index )
     {
         ModSpec modSpec = modSpecList.remove( index );
         if ( modSpec != null )
         {
             modSpec.modGroup.dispose();
             modSpec.modAddButton.dispose();
             modSpec.modDeleteButton.dispose();

             composite.setSize( composite.computeSize( SWT.DEFAULT, SWT.DEFAULT ) );
         }
     }


     /**
      * Adds a value line to the given modification spec.
      *
      * @param modSpec the modification spec
      * @param index the index
      * @param boolean the flag to update the size
      */
     private void addValueLine( ModSpec modSpec, int index, boolean updateSize )
     {
         ValueLine[] valueLines = modSpec.valueLineList.toArray( new ValueLine[modSpec.valueLineList.size()] );

         ValueLine newValueLine = createValueLine( modSpec );
         modSpec.valueLineList.add( newValueLine );

         if ( valueLines.length > 0 )
         {
             for ( int i = index; i < valueLines.length; i++ )
             {
                 ValueLine valueLine = valueLines[i];

                 // That's a trick to relocate the value line
                 // beneath the newly created one
                 Composite parentComposite = valueLine.valueComposite.getParent();
                 valueLine.valueComposite.setParent( scrolledComposite );
                 valueLine.valueComposite.setParent( parentComposite );

                 // Same trick to update the id in the list
                 modSpec.valueLineList.remove( valueLine );
                 modSpec.valueLineList.add( valueLine );
             }
         }

         if ( updateSize )
         {
             composite.setSize( composite.computeSize( SWT.DEFAULT, SWT.DEFAULT ) );
         }
     }


     /**
      * Creates the value line.
      *
      * @param modSpec the modification spec
      *
      * @return the value line
      */
     private ValueLine createValueLine( final ModSpec modSpec )
     {
         final ValueLine valueLine = new ValueLine();

         // text field
         valueLine.valueComposite = BaseWidgetUtils.createColumnContainer( modSpec.modGroup, 3, 1 );
         valueLine.valueText = BaseWidgetUtils.createText( valueLine.valueComposite, "", 1 ); //$NON-NLS-1$
         valueLine.valueText.addModifyListener( modifyListener );

         // add button with listener
         valueLine.valueAddButton = new Button( valueLine.valueComposite, SWT.PUSH );
         valueLine.valueAddButton.setText( "  +   " ); //$NON-NLS-1$
         valueLine.valueAddButton.addSelectionListener( new SelectionAdapter()
         {
             public void widgetSelected( SelectionEvent e )
             {
                 int index = modSpec.valueLineList.size();
                 for ( int i = 0; i < modSpec.valueLineList.size(); i++ )
                 {
                     ValueLine valueLine = modSpec.valueLineList.get( i );
                     if ( valueLine.valueAddButton == e.widget )
                     {
                         index = i + 1;
                     }
                 }

                 addValueLine( modSpec, index, true );

                 validate( true );
             }
         } );

         // delete button with listener
         valueLine.valueDeleteButton = new Button( valueLine.valueComposite, SWT.PUSH );
         valueLine.valueDeleteButton.setText( "  \u2212  " ); //$NON-NLS-1$
         valueLine.valueDeleteButton.addSelectionListener( new SelectionAdapter()
         {
             public void widgetSelected( SelectionEvent e )
             {
                 int index = 0;
                 for ( int i = 0; i < modSpec.valueLineList.size(); i++ )
                 {
                     ValueLine valueLine = modSpec.valueLineList.get( i );
                     if ( valueLine.valueDeleteButton == e.widget )
                     {
                         index = i;
                     }
                 }

                 deleteValueLine( modSpec, index );

                 validate( true );
             }
         } );

         return valueLine;
     }


     /**
      * Delete value line.
      *
      * @param modSpec the mod spec
      * @param index the index
      */
     private void deleteValueLine( ModSpec modSpec, int index )
     {
         ValueLine valueLine = ( ValueLine ) modSpec.valueLineList.remove( index );
         if ( valueLine != null )
         {
             valueLine.valueComposite.dispose();

             composite.setSize( composite.computeSize( SWT.DEFAULT, SWT.DEFAULT ) );
         }
     }


     /**
      * Gets the LDIF fragment.
      *
      * @return the LDIF fragment
      */
     public String getLdifFragment()
     {
         StringBuffer sb = new StringBuffer();
         sb.append( "changetype: modify" ).append( BrowserCoreConstants.LINE_SEPARATOR ); //$NON-NLS-1$

         ModSpec[] modSpecs = ( ModSpec[] ) modSpecList.toArray( new ModSpec[modSpecList.size()] );

         if ( modSpecs.length > 0 )
         {
             for ( int i = 0; i < modSpecs.length; i++ )
             {
                 ModSpec modSpec = modSpecs[i];

                 // get values
                 String type = modSpec.modType.getText();
                 String attribute = modSpec.modAttributeCombo.getText();
                 String[] values = new String[modSpec.valueLineList.size()];
                 for ( int k = 0; k < values.length; k++ )
                 {
                     values[k] = ( ( ValueLine ) modSpec.valueLineList.get( k ) ).valueText.getText();
                 }

                 // build ldif
                 sb.append( type ).append( ": " ).append( attribute ).append( BrowserCoreConstants.LINE_SEPARATOR ); //$NON-NLS-1$
                 for ( int k = 0; k < values.length; k++ )
                 {
                     if ( values[k].length() > 0 )
                     {
                         sb.append( attribute ).append( ": " ).append( values[k] ).append( //$NON-NLS-1$
                             BrowserCoreConstants.LINE_SEPARATOR );
                     }
                 }
                 sb.append( "-" ).append( BrowserCoreConstants.LINE_SEPARATOR ); //$NON-NLS-1$
                 // sb.append(BrowserCoreConstants.NEWLINE);
             }
         }

         return sb.toString();
     }

     /**
      * The Class ModSpec is a wrapper for all input elements
      * of an modification. It contains a combo for the modify
      * operation, a combo for the attribute to modify,
      * value lines and + and - buttons to add and remove
      * other modifications. It looks like this:
      * <pre>
      * ----------------------------------
      * | operation v | attribute type v |--------
      * ------------------------ --------| + | - |
      * | value                  | + | - |--------
      * ----------------------------------
      * </pre>
      */
     private class ModSpec
     {
         /** The mod group. */
         private Group modGroup;

         /** The mod type. */
         private Combo modType;

         /** The modification attribute. */
         private Combo modAttributeCombo;

         /** The mod add button. */
         private Button modAddButton;

         /** The mod delete button. */
         private Button modDeleteButton;

         /** The value line list. */
         private ArrayList<ValueLine> valueLineList = new ArrayList<ValueLine>();;
     }

     /**
      * The Class ValueLine is a wrapper for all input elements
      * of an value line. It contains an input field for the value
      * and + and - buttons to add and remove other value lines.
      * It looks like this:
      * <pre>
      * -------------------------------------
      * | value                     | + | - |
      * -------------------------------------
      * </pre>
      */
     private class ValueLine
     {
         /** The value composite. */
         private Composite valueComposite;

         /** The value text. */
         private Text valueText;

         /** The value add button. */
         private Button valueAddButton;

         /** The value delete button. */
         private Button valueDeleteButton;
     }
 }
	/*
	* 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.apache.directory.studio.ldapbrowser.common.widgets;


	import java.util.ArrayList;
	import java.util.Arrays;

	import org.apache.directory.studio.common.ui.widgets.AbstractWidget;
	import org.apache.directory.studio.common.ui.widgets.BaseWidgetUtils;
	import org.apache.directory.studio.connection.ui.widgets.ExtendedContentAssistCommandAdapter;
	import org.apache.directory.studio.ldapbrowser.core.BrowserCoreConstants;
	import org.apache.directory.studio.ldapbrowser.core.model.schema.Schema;
	import org.apache.directory.studio.ldapbrowser.core.model.schema.SchemaUtils;
	import org.eclipse.jface.fieldassist.ComboContentAdapter;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.ScrolledComposite;
	import org.eclipse.swt.events.ModifyEvent;
	import org.eclipse.swt.events.ModifyListener;
	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.Combo;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Group;
	import org.eclipse.swt.widgets.Text;


	/**
	* The ModWidget provides input elements to define an LDAP modify
	* operation.
	*
	* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
	*/
	public class ModWidget extends AbstractWidget
	{
	/** The scrolled composite */
	private ScrolledComposite scrolledComposite;

	/** The composite that contains the ModSpecs */
	private Composite composite;

	/** The list of ModSpecs */
	private ArrayList<ModSpec> modSpecList = new ArrayList<ModSpec>();

	/** The list content proposal provider */
	private ListContentProposalProvider listContentProposalProvider;

	/** The resulting LDIF */
	private String ldif;

	// Listeners
	private ModifyListener modifyListener = new ModifyListener()
	{
	public void modifyText( ModifyEvent e )
	{
	validate( true );
	}
	};


	/**
	* Creates a new instance of ModWidget.
	*
	* @param schema the schema with the possible attribute types
	*/
	public ModWidget( Schema schema )
	{
	String[] attributeDescriptions = SchemaUtils.getNamesAsArray( schema.getAttributeTypeDescriptions() );
	Arrays.sort( attributeDescriptions );
	listContentProposalProvider = new ListContentProposalProvider( attributeDescriptions );
	}


	/**
	* Disposes this widget.
	*/
	public void dispose()
	{
	}


	/**
	* Gets the ldif.
	*
	* @return the ldif
	*/
	public String getLdif()
	{
	return ldif;
	}


	/**
	* Creates the contents.
	*
	* @param parent the parent composite
	*
	* @return the created composite
	*/
	public Composite createContents( Composite parent )
	{
	// Creating the scrolled composite containing all UI
	scrolledComposite = new ScrolledComposite( parent, SWT.H_SCROLL \| SWT.V_SCROLL );
	scrolledComposite.setLayout( new GridLayout() );
	scrolledComposite.setExpandHorizontal( true );
	scrolledComposite.setLayoutData( new GridData( SWT.FILL, SWT.FILL, true, true ) );

	// Creating the composite
	composite = BaseWidgetUtils.createColumnContainer( scrolledComposite, 3, 1 );
	composite.setLayoutData( new GridData( SWT.FILL, SWT.FILL, true, true ) );
	scrolledComposite.setContent( composite );

	addInitialModSpec();

	validate( false );

	return scrolledComposite;
	}


	/**
	* Validates the input elements.
	*/
	public void validate( boolean notifyListeners )
	{
	for ( int i = 0; i < modSpecList.size(); i++ )
	{
	ModSpec modSpec = ( ModSpec ) modSpecList.get( i );
	if ( modSpecList.size() > 1 )
	{
	modSpec.modDeleteButton.setEnabled( true );
	}
	else
	{
	modSpec.modDeleteButton.setEnabled( false );
	}
	for ( int k = 0; k < modSpec.valueLineList.size(); k++ )
	{
	ValueLine valueLine = ( ValueLine ) modSpec.valueLineList.get( k );
	if ( modSpec.valueLineList.size() > 1 )
	{
	valueLine.valueDeleteButton.setEnabled( true );
	}
	else
	{
	valueLine.valueDeleteButton.setEnabled( false );
	}
	}
	}

	if ( notifyListeners )
	{
	notifyListeners();
	}
	}


	/**
	* Adds an initial modification spec.
	*
	*/
	private void addInitialModSpec()
	{
	addModSpec( 0 );
	}


	/**
	* Adds a modification spec at the given index.
	*
	* @param index the index
	*/
	private void addModSpec( int index )
	{
	// Getting the array of modification specs
	ModSpec[] modSpecs = ( ModSpec[] ) modSpecList.toArray( new ModSpec[modSpecList.size()] );

	// Adding a new modification spec
	ModSpec newModSpec = createModSpec( true );
	modSpecList.add( newModSpec );

	if ( modSpecs.length > 0 )
	{
	for ( int i = index; i < modSpecs.length; i++ )
	{
	ModSpec modSpec = modSpecs[i];

	// That's a trick to relocate the modification spec
	// beneath the newly created one
	modSpec.modGroup.setParent( scrolledComposite );
	modSpec.modAddButton.setParent( scrolledComposite );
	modSpec.modDeleteButton.setParent( scrolledComposite );
	modSpec.modGroup.setParent( composite );
	modSpec.modAddButton.setParent( composite );
	modSpec.modDeleteButton.setParent( composite );

	// Same trick to update the id in the list
	modSpecList.remove( modSpec );
	modSpecList.add( modSpec );
	}
	}

	composite.setSize( composite.computeSize( SWT.DEFAULT, SWT.DEFAULT ) );
	}


	/**
	* Creates and returns a modification spec.
	*
	* @param addFirstValueLine if a first value line should added
	* @return the created modification spec
	*/
	private ModSpec createModSpec( boolean addFirstValueLine )
	{
	ModSpec modSpec = new ModSpec();

	modSpec.modGroup = BaseWidgetUtils.createGroup( composite, "", 1 ); //$NON-NLS-1$
	modSpec.modGroup.setLayoutData( new GridData( SWT.FILL, SWT.NONE, true, false ) );
	Composite modSpecComposite = BaseWidgetUtils.createColumnContainer( modSpec.modGroup, 2, 1 );
	modSpec.modType = BaseWidgetUtils.createReadonlyCombo( modSpecComposite, new String[]
	{ "add", "replace", "delete" }, 0, 1 ); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
	modSpec.modType.setLayoutData( new GridData() );
	modSpec.modType.addModifyListener( modifyListener );

	// attribute combo with field decoration and content proposal
	modSpec.modAttributeCombo = BaseWidgetUtils.createCombo( modSpecComposite, new String[0], -1, 1 );
	new ExtendedContentAssistCommandAdapter( modSpec.modAttributeCombo, new ComboContentAdapter(),
	listContentProposalProvider, null, null, true );
	modSpec.modAttributeCombo.addModifyListener( modifyListener );

	// add button with listener
	modSpec.modAddButton = new Button( composite, SWT.PUSH );
	modSpec.modAddButton.setText( " + " ); //$NON-NLS-1$
	modSpec.modAddButton.addSelectionListener( new SelectionAdapter()
	{
	public void widgetSelected( SelectionEvent e )
	{
	int index = modSpecList.size();
	for ( int i = 0; i < modSpecList.size(); i++ )
	{
	ModSpec modSpec = modSpecList.get( i );
	if ( modSpec.modAddButton == e.widget )
	{
	index = i + 1;
	}
	}

	addModSpec( index );

	validate( true );
	}
	} );

	// delete button with listener
	modSpec.modDeleteButton = new Button( composite, SWT.PUSH );
	modSpec.modDeleteButton.setText( " \u2212 " ); //$NON-NLS-1$
	modSpec.modDeleteButton.addSelectionListener( new SelectionAdapter()
	{
	public void widgetSelected( SelectionEvent e )
	{
	int index = 0;
	for ( int i = 0; i < modSpecList.size(); i++ )
	{
	ModSpec modSpec = modSpecList.get( i );
	if ( modSpec.modDeleteButton == e.widget )
	{
	index = i;
	}
	}

	deleteModSpec( index );

	validate( true );
	}
	} );

	if ( addFirstValueLine )
	{
	addValueLine( modSpec, 0, false );
	}

	return modSpec;
	}


	/**
	* Delets a modification spec.
	*
	* @param index the index
	*/
	private void deleteModSpec( int index )
	{
	ModSpec modSpec = modSpecList.remove( index );
	if ( modSpec != null )
	{
	modSpec.modGroup.dispose();
	modSpec.modAddButton.dispose();
	modSpec.modDeleteButton.dispose();

	composite.setSize( composite.computeSize( SWT.DEFAULT, SWT.DEFAULT ) );
	}
	}


	/**
	* Adds a value line to the given modification spec.
	*
	* @param modSpec the modification spec
	* @param index the index
	* @param boolean the flag to update the size
	*/
	private void addValueLine( ModSpec modSpec, int index, boolean updateSize )
	{
	ValueLine[] valueLines = modSpec.valueLineList.toArray( new ValueLine[modSpec.valueLineList.size()] );

	ValueLine newValueLine = createValueLine( modSpec );
	modSpec.valueLineList.add( newValueLine );

	if ( valueLines.length > 0 )
	{
	for ( int i = index; i < valueLines.length; i++ )
	{
	ValueLine valueLine = valueLines[i];

	// That's a trick to relocate the value line
	// beneath the newly created one
	Composite parentComposite = valueLine.valueComposite.getParent();
	valueLine.valueComposite.setParent( scrolledComposite );
	valueLine.valueComposite.setParent( parentComposite );

	// Same trick to update the id in the list
	modSpec.valueLineList.remove( valueLine );
	modSpec.valueLineList.add( valueLine );
	}
	}

	if ( updateSize )
	{
	composite.setSize( composite.computeSize( SWT.DEFAULT, SWT.DEFAULT ) );
	}
	}


	/**
	* Creates the value line.
	*
	* @param modSpec the modification spec
	*
	* @return the value line
	*/
	private ValueLine createValueLine( final ModSpec modSpec )
	{
	final ValueLine valueLine = new ValueLine();

	// text field
	valueLine.valueComposite = BaseWidgetUtils.createColumnContainer( modSpec.modGroup, 3, 1 );
	valueLine.valueText = BaseWidgetUtils.createText( valueLine.valueComposite, "", 1 ); //$NON-NLS-1$
	valueLine.valueText.addModifyListener( modifyListener );

	// add button with listener
	valueLine.valueAddButton = new Button( valueLine.valueComposite, SWT.PUSH );
	valueLine.valueAddButton.setText( " + " ); //$NON-NLS-1$
	valueLine.valueAddButton.addSelectionListener( new SelectionAdapter()
	{
	public void widgetSelected( SelectionEvent e )
	{
	int index = modSpec.valueLineList.size();
	for ( int i = 0; i < modSpec.valueLineList.size(); i++ )
	{
	ValueLine valueLine = modSpec.valueLineList.get( i );
	if ( valueLine.valueAddButton == e.widget )
	{
	index = i + 1;
	}
	}

	addValueLine( modSpec, index, true );

	validate( true );
	}
	} );

	// delete button with listener
	valueLine.valueDeleteButton = new Button( valueLine.valueComposite, SWT.PUSH );
	valueLine.valueDeleteButton.setText( " \u2212 " ); //$NON-NLS-1$
	valueLine.valueDeleteButton.addSelectionListener( new SelectionAdapter()
	{
	public void widgetSelected( SelectionEvent e )
	{
	int index = 0;
	for ( int i = 0; i < modSpec.valueLineList.size(); i++ )
	{
	ValueLine valueLine = modSpec.valueLineList.get( i );
	if ( valueLine.valueDeleteButton == e.widget )
	{
	index = i;
	}
	}

	deleteValueLine( modSpec, index );

	validate( true );
	}
	} );

	return valueLine;
	}


	/**
	* Delete value line.
	*
	* @param modSpec the mod spec
	* @param index the index
	*/
	private void deleteValueLine( ModSpec modSpec, int index )
	{
	ValueLine valueLine = ( ValueLine ) modSpec.valueLineList.remove( index );
	if ( valueLine != null )
	{
	valueLine.valueComposite.dispose();

	composite.setSize( composite.computeSize( SWT.DEFAULT, SWT.DEFAULT ) );
	}
	}


	/**
	* Gets the LDIF fragment.
	*
	* @return the LDIF fragment
	*/
	public String getLdifFragment()
	{
	StringBuffer sb = new StringBuffer();
	sb.append( "changetype: modify" ).append( BrowserCoreConstants.LINE_SEPARATOR ); //$NON-NLS-1$

	ModSpec[] modSpecs = ( ModSpec[] ) modSpecList.toArray( new ModSpec[modSpecList.size()] );

	if ( modSpecs.length > 0 )
	{
	for ( int i = 0; i < modSpecs.length; i++ )
	{
	ModSpec modSpec = modSpecs[i];

	// get values
	String type = modSpec.modType.getText();
	String attribute = modSpec.modAttributeCombo.getText();
	String[] values = new String[modSpec.valueLineList.size()];
	for ( int k = 0; k < values.length; k++ )
	{
	values[k] = ( ( ValueLine ) modSpec.valueLineList.get( k ) ).valueText.getText();
	}

	// build ldif
	sb.append( type ).append( ": " ).append( attribute ).append( BrowserCoreConstants.LINE_SEPARATOR ); //$NON-NLS-1$
	for ( int k = 0; k < values.length; k++ )
	{
	if ( values[k].length() > 0 )
	{
	sb.append( attribute ).append( ": " ).append( values[k] ).append( //$NON-NLS-1$
	BrowserCoreConstants.LINE_SEPARATOR );
	}
	}
	sb.append( "-" ).append( BrowserCoreConstants.LINE_SEPARATOR ); //$NON-NLS-1$
	// sb.append(BrowserCoreConstants.NEWLINE);
	}
	}

	return sb.toString();
	}

	/**
	* The Class ModSpec is a wrapper for all input elements
	* of an modification. It contains a combo for the modify
	* operation, a combo for the attribute to modify,
	* value lines and + and - buttons to add and remove
	* other modifications. It looks like this:
	* <pre>
	* ----------------------------------
	* \| operation v \| attribute type v \|--------
	* ------------------------ --------\| + \| - \|
	* \| value \| + \| - \|--------
	* ----------------------------------
	* </pre>
	*/
	private class ModSpec
	{
	/** The mod group. */
	private Group modGroup;

	/** The mod type. */
	private Combo modType;

	/** The modification attribute. */
	private Combo modAttributeCombo;

	/** The mod add button. */
	private Button modAddButton;

	/** The mod delete button. */
	private Button modDeleteButton;

	/** The value line list. */
	private ArrayList<ValueLine> valueLineList = new ArrayList<ValueLine>();;
	}

	/**
	* The Class ValueLine is a wrapper for all input elements
	* of an value line. It contains an input field for the value
	* and + and - buttons to add and remove other value lines.
	* It looks like this:
	* <pre>
	* -------------------------------------
	* \| value \| + \| - \|
	* -------------------------------------
	* </pre>
	*/
	private class ValueLine
	{
	/** The value composite. */
	private Composite valueComposite;

	/** The value text. */
	private Text valueText;

	/** The value add button. */
	private Button valueAddButton;

	/** The value delete button. */
	private Button valueDeleteButton;
	}
	}