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/*******************************************************************************
* Copyright (c) 2012, 2016 Obeo.
* 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:
* Obeo - initial API and implementation
* Philip Langer - fixed bugs 461504, 488618
*******************************************************************************/
package org.eclipse.emf.compare.provider.spec;
import static com.google.common.base.Strings.isNullOrEmpty;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.compare.AttributeChange;
import org.eclipse.emf.compare.DifferenceKind;
import org.eclipse.emf.compare.DifferenceSource;
import org.eclipse.emf.compare.internal.EMFCompareEditMessages;
import org.eclipse.emf.compare.provider.AttributeChangeItemProvider;
import org.eclipse.emf.compare.provider.IItemDescriptionProvider;
import org.eclipse.emf.compare.provider.IItemStyledLabelProvider;
import org.eclipse.emf.compare.provider.ISemanticObjectLabelProvider;
import org.eclipse.emf.compare.provider.SafeAdapterFactoryItemDelegator;
import org.eclipse.emf.compare.provider.utils.ComposedStyledString;
import org.eclipse.emf.compare.provider.utils.IStyledString;
import org.eclipse.emf.compare.provider.utils.IStyledString.Style;
import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.ecore.util.FeatureMap;
import org.eclipse.emf.ecore.util.FeatureMapUtil;
import org.eclipse.emf.edit.provider.AdapterFactoryItemDelegator;
import org.eclipse.emf.edit.provider.IItemFontProvider;
/**
* Specialized {@link AttributeChangeItemProvider} returning nice output for {@link #getText(Object)} and
* {@link #getImage(Object)}.
*
* @author <a href="mailto:mikael.barbero@obeo.fr">Mikael Barbero</a>
*/
public class AttributeChangeItemProviderSpec extends AttributeChangeItemProvider implements IItemStyledLabelProvider, IItemDescriptionProvider, ISemanticObjectLabelProvider {
/** The elide length. */
private static final int ELIDE_LENGTH = 50;
/** The image provider used with this item provider. */
private final OverlayImageProvider overlayProvider;
/** The item delegator for attribute change values. */
private final AdapterFactoryItemDelegator itemDelegator;
/**
* Constructs an AttributeChangeItemProviderSpec with the given factory.
*
* @param adapterFactory
* the factory given to the super constructor.
*/
public AttributeChangeItemProviderSpec(AdapterFactory adapterFactory) {
super(adapterFactory);
itemDelegator = new SafeAdapterFactoryItemDelegator(getRootAdapterFactory());
overlayProvider = new OverlayImageProvider(getResourceLocator());
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.provider.MatchItemProvider#getImage(java.lang.Object)
*/
@Override
public Object getImage(Object object) {
AttributeChange attributeChange = (AttributeChange)object;
Object attributeChangeValueImage = itemDelegator.getImage(attributeChange.getValue());
if (attributeChangeValueImage == null) {
attributeChangeValueImage = super.getImage(object);
}
Object diffImage = overlayProvider.getComposedImage(attributeChange, attributeChangeValueImage);
Object ret = overlayImage(object, diffImage);
return ret;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.provider.AttributeChangeItemProvider#getText(java.lang.Object)
*/
@Override
public String getText(Object object) {
return getStyledText(object).getString();
}
/**
* Returns the name of the attribute linked to the given {@link AttributeChange}.
*
* @param attChange
* the given {@link AttributeChange}.
* @return the name of the attribute linked to the given {@link AttributeChange}.
*/
protected String getAttributeText(final AttributeChange attChange) {
return attChange.getAttribute().getName();
}
/**
* Converts to text the given {@link AttributeChange}.
*
* @param attChange
* the given {@link AttributeChange}.
* @return a nice text from the the given {@link AttributeChange}.
*/
protected String getValueText(final AttributeChange attChange) {
String value;
Object attValue = attChange.getValue();
if (FeatureMapUtil.isFeatureMap(attChange.getAttribute())) {
FeatureMap.Entry entry = (FeatureMap.Entry)attValue;
EStructuralFeature entryFeature = entry.getEStructuralFeature();
if (entryFeature instanceof EAttribute) {
value = EcoreUtil.convertToString(((EAttribute)entryFeature).getEAttributeType(), attValue);
} else {
value = itemDelegator.getText(entry.getValue());
}
} else {
value = EcoreUtil.convertToString(attChange.getAttribute().getEAttributeType(), attValue);
}
if (isNullOrEmpty(value)) {
if (attValue instanceof EObject && ((EObject)attValue).eIsProxy()) {
value = "proxy : " + ((InternalEObject)attValue).eProxyURI().toString(); //$NON-NLS-1$
} else {
value = "<null>"; //$NON-NLS-1$
}
} else {
value = org.eclipse.emf.compare.provider.spec.Strings.removeLineBreaks(value);
value = org.eclipse.emf.compare.provider.spec.Strings.elide(value, ELIDE_LENGTH, "..."); //$NON-NLS-1$
}
return value;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.edit.provider.ItemProviderAdapter#getForeground(java.lang.Object)
*/
@Override
public Object getForeground(Object object) {
AttributeChange attributeChange = (AttributeChange)object;
switch (attributeChange.getState()) {
case MERGED:
case DISCARDED:
return URI.createURI("color://rgb/156/156/156"); //$NON-NLS-1$
default:
return super.getForeground(object);
}
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.provider.IItemStyledLabelProvider#getStyledText(java.lang.Object)
*/
@Override
public IStyledString.IComposedStyledString getStyledText(Object object) {
final AttributeChange attChange = (AttributeChange)object;
final String valueText = getValueText(attChange);
final String attributeText = getAttributeText(attChange);
ComposedStyledString ret = new ComposedStyledString();
final Object attChangeValue = attChange.getValue();
if (attChangeValue instanceof EObject && ((EObject)attChangeValue).eIsProxy()) {
Style italic = Style.builder().setFont(IItemFontProvider.ITALIC_FONT).build();
ret.append(valueText, italic);
} else {
ret.append(valueText);
}
ret.append(" [" + attributeText, Style.DECORATIONS_STYLER); //$NON-NLS-1$
switch (attChange.getKind()) {
case ADD:
ret.append(" add", Style.DECORATIONS_STYLER); //$NON-NLS-1$
break;
case DELETE:
ret.append(" delete", Style.DECORATIONS_STYLER); //$NON-NLS-1$
break;
case CHANGE:
ret.append(
" " + ReferenceChangeItemProviderSpec.changeText(attChange, attChange.getAttribute()), //$NON-NLS-1$
Style.DECORATIONS_STYLER);
break;
case MOVE:
ret.append(" move", Style.DECORATIONS_STYLER); //$NON-NLS-1$
break;
default:
throw new IllegalStateException("Unsupported " + DifferenceKind.class.getSimpleName() //$NON-NLS-1$
+ " value: " + attChange.getKind()); //$NON-NLS-1$
}
ret.append("]", Style.DECORATIONS_STYLER); //$NON-NLS-1$
return ret;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.provider.ISemanticObjectLabelProvider#getSemanticObjectLabel(java.lang.Object)
* @since 4.2
*/
public String getSemanticObjectLabel(Object object) {
final AttributeChange attChange = (AttributeChange)object;
return getValueText(attChange);
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.provider.IItemDescriptionProvider#getDescription(java.lang.Object)
*/
public String getDescription(Object object) {
final AttributeChange attChange = (AttributeChange)object;
final String valueText = getValueText(attChange);
final String attributeText = getAttributeText(attChange);
String hasBeenAndSide = EMFCompareEditMessages.getString("change.local"); //$NON-NLS-1$
if (attChange.getSource() == DifferenceSource.RIGHT) {
hasBeenAndSide = EMFCompareEditMessages.getString("change.remote"); //$NON-NLS-1$
}
String ret = ""; //$NON-NLS-1$
switch (attChange.getKind()) {
case ADD:
ret = EMFCompareEditMessages.getString("AttributeChangeItemProviderSpec.valueAdded", //$NON-NLS-1$
valueText, hasBeenAndSide, attributeText);
break;
case DELETE:
ret = EMFCompareEditMessages.getString("AttributeChangeItemProviderSpec.valueRemoved", //$NON-NLS-1$
valueText, hasBeenAndSide, attributeText);
break;
case CHANGE:
String changeText = ReferenceChangeItemProviderSpec.changeText(attChange,
attChange.getAttribute());
ret = EMFCompareEditMessages.getString("AttributeChangeItemProviderSpec.valueChanged", //$NON-NLS-1$
attributeText, valueText, hasBeenAndSide, changeText);
break;
case MOVE:
ret = EMFCompareEditMessages.getString("AttributeChangeItemProviderSpec.valueMoved", //$NON-NLS-1$
valueText, hasBeenAndSide, attributeText);
break;
default:
throw new IllegalStateException("Unsupported " + DifferenceKind.class.getSimpleName() //$NON-NLS-1$
+ " value: " + attChange.getKind()); //$NON-NLS-1$
}
return ret;
}
}
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