GoToAddressComposite.java :  » IDE-Eclipse » debug » org » eclipse » debug » internal » ui » views » memory » renderings » Java Open Source

/*******************************************************************************
 * Copyright (c) 2006 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.debug.internal.ui.views.memory.renderings;

import java.math.BigInteger;

import org.eclipse.debug.internal.ui.DebugUIMessages;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
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.Control;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.PlatformUI;

public class GoToAddressComposite {
  
  private Text fExpression;
  private Button fOKButton;
  private Button fCancelButton;
  private Composite fComposite;
  private Combo fGoToCombo;
  private Button fHexButton;

  /**
   * @param parent
   * @return
   */
  public Control createControl(Composite parent)
  {
    fComposite = new Composite(parent, SWT.NONE);
    PlatformUI.getWorkbench().getHelpSystem().setHelp(fComposite, DebugUIPlugin.getUniqueIdentifier() + ".GoToAddressComposite_context"); //$NON-NLS-1$
    GridLayout layout = new GridLayout();
    layout.numColumns = 6;
    layout.makeColumnsEqualWidth = false;
    layout.marginHeight = 0;
    layout.marginLeft = 0;
    fComposite.setLayout(layout);
    
    fGoToCombo = new Combo(fComposite, SWT.READ_ONLY);
    fGoToCombo.add(DebugUIMessages.GoToAddressComposite_0);
    fGoToCombo.add(DebugUIMessages.GoToAddressComposite_4);
    fGoToCombo.add(DebugUIMessages.GoToAddressComposite_5);
    fGoToCombo.select(0);

    fExpression = new Text(fComposite, SWT.SINGLE | SWT.BORDER);
    fExpression.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
    
    fHexButton = new Button(fComposite, SWT.CHECK);
    fHexButton.setText(DebugUIMessages.GoToAddressComposite_6);
    fHexButton.setSelection(true);
    
    fOKButton = new Button(fComposite, SWT.NONE);
    fOKButton.setText(DebugUIMessages.GoToAddressComposite_1);
    
    fCancelButton = new Button(fComposite, SWT.NONE);
    fCancelButton.setText(DebugUIMessages.GoToAddressComposite_2);
    
    return fComposite;
  }
  
  public int getHeight()
  {
    int height = fComposite.computeSize(SWT.DEFAULT, SWT.DEFAULT).y;
    return height;
  }
  
  public Button getButton(int id)
  {
    if (id == IDialogConstants.OK_ID)
      return fOKButton;
    else if (id == IDialogConstants.CANCEL_ID)
      return fCancelButton;
    return null;
  }
  
  public String getExpressionText()
  {
    return fExpression.getText();
  }
  
  public Text getExpressionWidget()
  {
    return fExpression;
  }
  
  public boolean isGoToAddress()
  {
    return fGoToCombo.getSelectionIndex() == 0;
  }
  
  public boolean isOffset()
  {
    return fGoToCombo.getSelectionIndex() == 1;
  }
  
  public boolean isJump()
  {
    return fGoToCombo.getSelectionIndex() == 2;
  }
  
  public boolean isHex()
  {
    return fHexButton.getSelection();
  }
  
  public BigInteger getGoToAddress(BigInteger baseAddress, BigInteger selectedAddress) throws NumberFormatException
  {
    boolean add = true;
    String expression = getExpressionText();
    boolean hex = isHex();
    int radix = hex?16:10;
    
    expression = expression.trim();
    
    if (isGoToAddress())
    {
      expression = expression.toUpperCase();
      if (expression.startsWith("0X")) //$NON-NLS-1$
      {
        expression = expression.substring(2);
        radix = 16;
      }
      
      return new BigInteger(expression, radix);
    }

    if (expression.startsWith("+")) //$NON-NLS-1$
    {
      expression = expression.substring(1);
    }
    else if (expression.startsWith("-")) //$NON-NLS-1$
    {
      expression = expression.substring(1);
      add = false;
    }
    
    expression = expression.toUpperCase();
    if (expression.startsWith("0X")) //$NON-NLS-1$
    {
      expression = expression.substring(2);
      radix = 16;
    }
    
    BigInteger gotoAddress = new BigInteger(expression, radix); 

    BigInteger address = baseAddress;
    if (isJump())
      address = selectedAddress;

    if (address == null)
      throw new NumberFormatException(DebugUIMessages.GoToAddressComposite_7);
    
    if (add)
      gotoAddress = address.add(gotoAddress);
    else
      gotoAddress = address.subtract(gotoAddress);
    
    return gotoAddress;
  }

}