/*
 *(c) Copyright QNX Software Systems Ltd. 2002.
 * All Rights Reserved.
 * 
 */
package org.eclipse.cdt.debug.internal.ui.wizards;

import org.eclipse.cdt.debug.core.sourcelookup.IDirectorySourceLocation;
import org.eclipse.cdt.debug.core.sourcelookup.SourceLookupFactory;
import org.eclipse.cdt.debug.internal.ui.PixelConverter;
import org.eclipse.cdt.debug.internal.ui.SWTUtil;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
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.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.DirectoryDialog;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

/**
 * Enter type comment.
 * 
 * @since: Dec 12, 2002
 */
public class AddDirectorySourceLocationBlock
{
	private Composite fControl = null;
	private Text fLocationText = null;
	private Text fAssociationText = null;
	private Button fAssocitedCheckButton = null;
	private Button fSearchSubfoldersButton = null;
	private Shell fShell = null;
	
	private IPath fInitialAssosciationPath = null;

	/**
	 * Constructor for AddDirectorySourceLocationBlock.
	 */
	public AddDirectorySourceLocationBlock( IPath initialAssosciationPath )
	{
		fInitialAssosciationPath = initialAssosciationPath;
	}
	
	public void createControl( Composite parent )
	{
		fShell = parent.getShell();
		fControl = new Composite( parent, SWT.NONE );
		fControl.setLayout( new GridLayout() );
		fControl.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		fControl.setFont( JFaceResources.getDialogFont() );	

		createLocationControls( fControl );
		createAssociationControls( fControl );
		createSearchSubfoldersButton( fControl );
		
		setInitialAssociationPath();
	}

	private void setInitialAssociationPath()
	{
		fAssociationText.setEnabled( ( fInitialAssosciationPath != null ) );
		fAssocitedCheckButton.setSelection( ( fInitialAssosciationPath != null ) );
		if ( fInitialAssosciationPath != null )
		{
			fAssociationText.setText( fInitialAssosciationPath.toOSString() );
		}
	}
	
	public Control getControl()
	{
		return fControl;
	}

	protected void createLocationControls( Composite parent )
	{
		PixelConverter converter = new PixelConverter( parent );
		Label label = new Label( parent, SWT.NONE );
		label.setText( "Select location directory:" );
		label.setLayoutData( new GridData( GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL ) );
		Composite composite = new Composite( parent, SWT.NONE );
		composite.setLayout( new GridLayout( 2, false ) );
		GridData data = new GridData( GridData.FILL_BOTH );
		data.widthHint = converter.convertWidthInCharsToPixels( 70 );
		composite.setLayoutData( data );
		fLocationText = new Text( composite, SWT.SINGLE | SWT.BORDER );
		fLocationText.setLayoutData( new GridData( GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL ) );
		Button button = createButton( composite, "&Browse..." );
		button.addSelectionListener( new SelectionAdapter() 
											{
												/* (non-Javadoc)
												 * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(SelectionEvent)
												 */
												public void widgetSelected( SelectionEvent e )
												{
													selectLocation();
												}
											} );
	}

	protected void selectLocation()
	{
		DirectoryDialog dialog = new DirectoryDialog( fShell );
		dialog.setMessage( "Select Location Directory" );
		String result = dialog.open();
		if ( result != null )
		{
			fLocationText.setText( result );
		}
	}

	protected void createAssociationControls( Composite parent )
	{
		Composite composite = new Composite( parent, SWT.NONE );
		composite.setLayout( new GridLayout() );
		GridData data = new GridData( GridData.FILL_BOTH );
		composite.setLayoutData( data );
		fAssocitedCheckButton = new Button( composite, SWT.CHECK );
		fAssocitedCheckButton.setText( "&Associate with" );
		fAssociationText = new Text( composite, SWT.SINGLE | SWT.BORDER );
		fAssociationText.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		fAssocitedCheckButton.addSelectionListener( new SelectionAdapter()
														{
															/* (non-Javadoc)
															 * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(SelectionEvent)
															 */
															public void widgetSelected(SelectionEvent e)
															{
																associationSelectionChanged();
															}

														} );
	}

	protected void associationSelectionChanged()
	{
		boolean checked = fAssocitedCheckButton.getSelection();
		fAssociationText.setEnabled( checked );
		if ( !checked )
			fAssociationText.setText( "" );
	}

	protected void createSearchSubfoldersButton( Composite parent )
	{
		Composite composite = new Composite( parent, SWT.NONE );
		composite.setLayout( new GridLayout() );
		GridData data = new GridData( GridData.FILL_BOTH );
		composite.setLayoutData( data );
		fSearchSubfoldersButton = new Button( composite, SWT.CHECK );
		fSearchSubfoldersButton.setText( "Search sub&folders" );
	}

	protected Button createButton( Composite parent, String label )
	{
		Button button = new Button( parent, SWT.PUSH );
		button.setText( label );
		GridData data = new GridData( GridData.END );
		button.setLayoutData( data );
		SWTUtil.setButtonDimensionHint( button );
		button.setFont( parent.getFont() );

		return button;
	}
	
	public String getLocationPath()
	{
		return fLocationText.getText().trim();
	}
	
	public String getAssociationPath()
	{
		if ( fAssocitedCheckButton.getSelection() )
		{
			return fAssociationText.getText().trim();
		}
		return "";
	}

	public boolean searchSubfolders()
	{
		return ( fSearchSubfoldersButton != null ) ? fSearchSubfoldersButton.getSelection() : false;
	}

	public IDirectorySourceLocation	getSourceLocation()
	{
		if ( isLocationPathValid() )
		{
			Path association = ( isAssociationPathValid() ) ? new Path( getAssociationPath() ) : null;
			return SourceLookupFactory.createDirectorySourceLocation( new Path( getLocationPath() ), association, searchSubfolders() );
		}			
		return null;
	}

	public void addDirectoryModifyListener( ModifyListener listener )
	{
		if ( fLocationText != null )
		{
			fLocationText.addModifyListener( listener );
		}
	}
	
	public void addAssociationModifyListener( ModifyListener listener )
	{
		if ( fAssociationText != null )
		{
			fAssociationText.addModifyListener( listener );
		}
	}
	
	public void removeDirectoryModifyListener( ModifyListener listener )
	{
		if ( fLocationText != null )
		{
			fLocationText.removeModifyListener( listener );
		}
	}
	
	public void removeAssociationModifyListener( ModifyListener listener )
	{
		if ( fAssociationText != null )
		{
			fAssociationText.removeModifyListener( listener );
		}
	}
		
	private boolean isLocationPathValid()
	{
		if ( fLocationText != null && Path.EMPTY.isValidPath( fLocationText.getText().trim() ) )
		{
			Path path = new Path( fLocationText.getText().trim() );
			return ( path.toFile().exists() && path.toFile().isAbsolute() );
		}
		return false;
	}

	public boolean isAssociationPathValid()
	{
		String pathString = getAssociationPath();
		if ( pathString.length() > 0 )
		{
			return Path.EMPTY.isValidPath( pathString );
		}
		return true;
	}
}