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/*******************************************************************************
* Copyright (c) 2005, 2015 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.ui.memory.AbstractTableRendering;
import org.eclipse.debug.ui.memory.MemoryRenderingElement;
import org.eclipse.jface.viewers.IColorProvider;
import org.eclipse.jface.viewers.IFontProvider;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ITableColorProvider;
import org.eclipse.jface.viewers.ITableFontProvider;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
/**
* This label provider is used by AbstractTableRendering if clients decide to
* provide customized decorations in the rendering. Otherwise the table
* rendering uses TableRenderingLabelProvider.
*
*/
public class TableRenderingLabelProviderEx extends TableRenderingLabelProvider implements ITableColorProvider, ITableFontProvider {
private IFontProvider fFontProvider;
private ILabelProvider fLabelProvider;
private IColorProvider fColorProvider;
public TableRenderingLabelProviderEx(AbstractTableRendering rendering) {
super(rendering);
fLabelProvider = rendering.getAdapter(ILabelProvider.class);
fColorProvider = rendering.getAdapter(IColorProvider.class);
fFontProvider = rendering.getAdapter(IFontProvider.class);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.IBaseLabelProvider#dispose()
*/
@Override
public void dispose() {
if (fFontProvider != null) {
fFontProvider = null;
}
if (fColorProvider != null) {
fColorProvider = null;
}
if (fLabelProvider != null) {
fLabelProvider.dispose();
fLabelProvider = null;
}
super.dispose();
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITableColorProvider#getBackground(java.lang.Object, int)
*/
@Override
public Color getBackground(Object element, int columnIndex) {
if (fColorProvider != null && columnIndex > 0) {
MemoryRenderingElement renderingElement = getMemoryRenderingElement(element, columnIndex);
if (renderingElement != null) {
Color color = fColorProvider.getBackground(renderingElement);
if (color != null)
return color;
}
}
return super.getBackground(element);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITableColorProvider#getForeground(java.lang.Object, int)
*/
@Override
public Color getForeground(Object element, int columnIndex) {
if (fColorProvider != null && columnIndex > 0) {
MemoryRenderingElement renderingElement = getMemoryRenderingElement(element, columnIndex);
if (renderingElement != null) {
Color color = fColorProvider.getForeground(renderingElement);
if (color != null)
return color;
}
}
return super.getForeground(element);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnImage(java.lang.Object, int)
*/
@Override
public Image getColumnImage(Object element, int columnIndex) {
if (fLabelProvider != null && columnIndex > 0) {
MemoryRenderingElement renderingElement = getMemoryRenderingElement(element, columnIndex);
if (renderingElement != null) {
Image image = fLabelProvider.getImage(renderingElement);
if (image != null)
return image;
}
}
return super.getColumnImage(element, columnIndex);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITableFontProvider#getFont(java.lang.Object, int)
*/
@Override
public Font getFont(Object element, int columnIndex) {
if (fFontProvider != null && columnIndex > 0) {
MemoryRenderingElement renderingElement = getMemoryRenderingElement(element, columnIndex);
if (renderingElement != null) {
Font font = fFontProvider.getFont(renderingElement);
if (font != null)
return font;
}
}
return null;
}
/**
* Returns a memory rendering element corresponding to the given element
* or <code>null</code> if none.
*
* @param element element to be rendered
* @param columnIndex column index at which to render
* @return memory rendering element or <code>null</code>
*/
private MemoryRenderingElement getMemoryRenderingElement(Object element, int columnIndex) {
if (element instanceof TableRenderingLine) {
TableRenderingLine line = (TableRenderingLine) element;
BigInteger lineAddress = new BigInteger(line.getAddress(), 16);
int offset = (columnIndex - 1) * fRendering.getBytesPerColumn();
if (offset < fRendering.getBytesPerLine() && (offset + fRendering.getBytesPerColumn()) <= fRendering.getBytesPerLine()) {
return getMemoryRenderingElement(line, lineAddress, offset);
}
}
return null;
}
private MemoryRenderingElement getMemoryRenderingElement(TableRenderingLine line, BigInteger lineAddress, int offset) {
BigInteger cellAddress = lineAddress.add(BigInteger.valueOf(offset));
MemoryByte[] bytes = line.getBytes(offset, offset
+ fRendering.getBytesPerColumn());
// make a copy to ensure that the memory bytes are not overwritten
// by clients
MemoryByte[] copy = new MemoryByte[bytes.length];
System.arraycopy(bytes, 0, copy, 0, bytes.length);
MemoryRenderingElement renderingElement = new MemoryRenderingElement(
fRendering, cellAddress, copy);
return renderingElement;
}
}
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