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/*******************************************************************************
* Copyright (c) 2004, 2006 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.internal.ui.views.memory.renderings;
import java.math.BigInteger;
import org.eclipse.debug.core.model.MemoryByte;
import org.eclipse.debug.internal.ui.memory.provisional.AbstractAsyncTextRendering;
import org.eclipse.debug.ui.DebugUITools;
import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.jface.util.PropertyChangeEvent;
/**
* Convert bytes into ASCII string and vice versa
* @since 3.1
*/
public class ASCIIRendering extends AbstractAsyncTextRendering{
private final int numCharsPerByte = 1;
public ASCIIRendering(String renderingId)
{
super(renderingId);
String codepage = DebugUITools.getPreferenceStore().getString(IDebugUIConstants.PREF_DEFAULT_ASCII_CODE_PAGE);
setCodePage(codepage);
}
@Override
public void dispose() {
super.dispose();
}
@Override
public int getNumCharsPerByte() {
return numCharsPerByte;
}
@Override
public byte[] getBytes(
String renderingId,
BigInteger address,
MemoryByte[] currentValues,
String data) {
byte[] bytes = super.getBytes(renderingId, address, currentValues, data);
// undo the replacement of 1's to 0's.
for (int i=0; i<bytes.length && i < currentValues.length; i++)
{
if (bytes[i] == 1 && currentValues[i].getValue() == 0)
{
bytes[i] = 0;
}
}
return bytes;
}
@Override
public String getString(
String renderingId,
BigInteger address,
MemoryByte[] data) {
MemoryByte[] copy = new MemoryByte[data.length];
// If a byte equals zero, it represents null in a string
// and often causes subsequent string not displayed or printed properly
// Replace all null with 1's
for (int i=0; i<data.length; i++){
copy[i] = new MemoryByte();
if (data[i].getValue() == 0)
{
copy[i].setValue((byte)1);
}
else
{
copy[i].setValue(data[i].getValue());
}
copy[i].setFlags(data[i].getFlags());
}
return super.getString(renderingId, address, copy);
}
@Override
public void propertyChange(PropertyChangeEvent event) {
// handle code page changed event
if (event.getProperty().equals(IDebugUIConstants.PREF_DEFAULT_ASCII_CODE_PAGE))
{
String codePage = (String)event.getNewValue();
setCodePage(codePage);
if (isVisible()) {
// just update labels, don't need to reget memory
updateLabels();
}
}
super.propertyChange(event);
}
}
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