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/*******************************************************************************
* Copyright (c) 2008 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.ui.viewmodel.register;
import org.eclipse.cdt.dsf.datamodel.DMContexts;
import org.eclipse.cdt.dsf.datamodel.IDMContext;
import org.eclipse.cdt.dsf.debug.service.IFormattedValues;
import org.eclipse.cdt.dsf.debug.service.IRegisters.IBitFieldDMContext;
import org.eclipse.cdt.dsf.debug.service.IRegisters.IBitFieldDMData;
import org.eclipse.cdt.dsf.debug.service.IRegisters.IMnemonic;
import org.eclipse.cdt.dsf.debug.ui.viewmodel.IDebugVMConstants;
import org.eclipse.cdt.dsf.debug.ui.viewmodel.expression.WatchExpressionCellModifier;
import org.eclipse.cdt.dsf.debug.ui.viewmodel.numberformat.FormattedValueVMUtil;
import org.eclipse.cdt.dsf.ui.viewmodel.IVMContext;
import org.eclipse.cdt.dsf.ui.viewmodel.datamodel.IDMVMContext;
import org.eclipse.cdt.dsf.ui.viewmodel.update.AbstractCachingVMProvider;
import org.eclipse.cdt.dsf.ui.viewmodel.update.UserEditEvent;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext;
public class RegisterBitFieldCellModifier extends WatchExpressionCellModifier {
public static enum BitFieldEditorStyle { NOTHING, BITFIELDCOMBO, BITFIELDTEXT }
private AbstractCachingVMProvider fProvider;
private BitFieldEditorStyle fStyle;
private IBitFieldDMData fBitFieldData = null;
private Object fElement = null;
private SyncRegisterDataAccess fDataAccess = null;
/**
* @since 2.0
*/
public RegisterBitFieldCellModifier(AbstractCachingVMProvider provider,
BitFieldEditorStyle style, SyncRegisterDataAccess access )
{
fProvider = provider;
fStyle = style;
fDataAccess = access;
}
/*
* Used to make sure we are dealing with a valid register.
*/
private IBitFieldDMContext getBitFieldDMC(Object element) {
if (element instanceof IDMVMContext) {
IDMContext dmc = ((IDMVMContext)element).getDMContext();
return DMContexts.getAncestorOfType(dmc, IBitFieldDMContext.class);
}
return null;
}
@Override
public boolean canModify(Object element, String property) {
/*
* If we're in the column value, modify the register data.
* Otherwise, call the super-class to edit the watch expression.
*/
if ( IDebugVMConstants.COLUMN_ID__VALUE.equals(property) ) {
/*
* Make sure we are are dealing with a valid set of information.
*/
if ( getBitFieldDMC(element) == null ) return false;
fElement = element;
/*
* We need to read the register in order to get the attributes.
*/
fBitFieldData = fDataAccess.readBitField(element);
if ( ( fBitFieldData != null ) && ( ! fBitFieldData.isWriteable() ) ) return false;
return true ;
} else {
return super.canModify(element, property);
}
}
@Override
public Object getValue(Object element, String property) {
/*
* If we're in the column value, modify the register data.
* Otherwise, call the super-class to edit the watch expression.
*/
if ( IDebugVMConstants.COLUMN_ID__VALUE.equals(property) ) {
/*
* Make sure we are working on the editable areas.
*/
if ( element != fElement ) return false;
if ( fStyle == BitFieldEditorStyle.BITFIELDTEXT ) {
/*
* We let the Model provider supply the current format.
*/
String formatId;
if ( element instanceof IVMContext) {
/*
* Find the presentation context and then use it to get the current desired format.
*/
IVMContext ctx = (IVMContext) element;
IPresentationContext presCtx = ctx.getVMNode().getVMProvider().getPresentationContext();
formatId = FormattedValueVMUtil.getPreferredFormat(presCtx);
}
else {
formatId = IFormattedValues.NATURAL_FORMAT;
}
String value = fDataAccess.getFormattedBitFieldValue(fElement, formatId);
if ( value == null ) { value = "..."; } //$NON-NLS-1$
return value;
}
else {
/*
* This is a COMBO BOX. So we need to take the value of the bitfield and
* compare it to the associated mnemonic values to see which mnemonic is
* representing the current value. At this point the Bitfield Model data
* has already been established since the "canModify()" method is called
* first by the flexible hierarchy proxies.
*/
IMnemonic curMnemonic = fBitFieldData.getCurrentMnemonicValue();
int index = 0 ;
for ( IMnemonic mnemonic : fBitFieldData.getMnemonics() ) {
if ( mnemonic.equals( curMnemonic ) ) {
return new Integer( index );
}
index ++;
}
return null;
}
} else {
return super.getValue(element, property);
}
}
@Override
public void modify(Object element, String property, Object value) {
/*
* If we're in the column value, modify the register data.
* Otherwise, call the super-class to edit the watch expression.
*/
if ( IDebugVMConstants.COLUMN_ID__VALUE.equals(property) ) {
if ( fStyle == BitFieldEditorStyle.BITFIELDTEXT ) {
if (value instanceof String) {
/*
* We let the Model provider supply the current format.
*/
String formatId;
if ( element instanceof IVMContext) {
/*
* Find the presentation context and then use it to get the current desired format.
*/
IVMContext ctx = (IVMContext) element;
IPresentationContext presCtx = ctx.getVMNode().getVMProvider().getPresentationContext();
formatId = FormattedValueVMUtil.getPreferredFormat(presCtx);
}
else {
formatId = IFormattedValues.NATURAL_FORMAT;
}
fDataAccess.writeBitField(element, (String) value, formatId);
fProvider.handleEvent(new UserEditEvent(element));
}
}
else {
if (value instanceof Integer) {
/*
* Get the integer value corresponding to the selected entry.
*/
Integer val = (Integer) value;
/*
* Write the bit field using the selected mnemonic.
*/
fDataAccess.writeBitField(element, fBitFieldData.getMnemonics()[val.intValue()]);
fProvider.handleEvent(new UserEditEvent(element));
}
}
} else {
super.modify(element, property, value);
}
}
}
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