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/*******************************************************************************
* Copyright (c) 2011 Wind River Systems 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.dsf.debug.internal.ui.disassembly;
import org.eclipse.cdt.debug.internal.ui.disassembly.dsf.AddressRangePosition;
import org.eclipse.cdt.debug.internal.ui.disassembly.dsf.DisassemblyPosition;
import org.eclipse.cdt.dsf.debug.internal.ui.disassembly.model.DisassemblyDocument;
import org.eclipse.jface.text.BadLocationException;
/**
* A vertical ruler column to display the opcodes of instructions.
*/
public class OpcodeRulerColumn extends DisassemblyRulerColumn {
private int fRadix;
private String fRadixPrefix;
/**
* Default constructor.
*/
public OpcodeRulerColumn() {
super();
}
public void setRadix(int radix) {
fRadix= radix;
setShowRadixPrefix();
}
public void setShowRadixPrefix() {
if (fRadix == 16) {
fRadixPrefix = "0x"; //$NON-NLS-1$
} else if (fRadix == 8) {
fRadixPrefix = "0"; //$NON-NLS-1$
} else {
fRadixPrefix = null;
}
}
/*
* @see org.eclipse.jface.text.source.LineNumberRulerColumn#createDisplayString(int)
*/
@Override
protected String createDisplayString(int line) {
int nChars = computeNumberOfCharacters();
if (nChars > 0) {
DisassemblyDocument doc = (DisassemblyDocument)getParentRuler().getTextViewer().getDocument();
try {
int offset = doc.getLineOffset(line);
AddressRangePosition pos = doc.getDisassemblyPosition(offset);
if (pos instanceof DisassemblyPosition && pos.length > 0 && pos.offset == offset && pos.fValid) {
DisassemblyPosition disassPos = (DisassemblyPosition)pos;
if (disassPos.fOpcodes != null) {
// Format the output.
String str = disassPos.fOpcodes.toString(fRadix);
int prefixLength = 0;
if (fRadixPrefix != null)
prefixLength = fRadixPrefix.length();
StringBuilder buf = new StringBuilder(nChars);
if (prefixLength != 0)
buf.append(fRadixPrefix);
for (int i=str.length()+prefixLength; i < nChars; ++i)
buf.append('0');
buf.append(str);
return buf.toString();
}
} else if (pos != null && !pos.fValid) {
return DOTS.substring(0, nChars);
}
} catch (BadLocationException e) {
// silently ignored
}
}
return ""; //$NON-NLS-1$
}
@Override
protected int computeNumberOfCharacters() {
DisassemblyDocument doc = (DisassemblyDocument)getParentRuler().getTextViewer().getDocument();
return doc.getMaxOpcodeLength(fRadix);
}
}
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