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/*****************************************************************************
* Copyright (c) 2013, 2015 CEA LIST, Christian W. Damus, 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:
* CEA LIST - Initial API and implementation
* Christian W. Damus - bug 433206
*****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.css.style.impl;
import java.util.Arrays;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.gmf.runtime.notation.BooleanValueStyle;
import org.eclipse.gmf.runtime.notation.CanonicalStyle;
import org.eclipse.gmf.runtime.notation.DoubleValueStyle;
import org.eclipse.gmf.runtime.notation.IntValueStyle;
import org.eclipse.gmf.runtime.notation.NamedStyle;
import org.eclipse.gmf.runtime.notation.NotationFactory;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.StringListValueStyle;
import org.eclipse.gmf.runtime.notation.StringValueStyle;
import org.eclipse.gmf.runtime.notation.Style;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.infra.gmfdiag.css.Activator;
import org.eclipse.papyrus.infra.gmfdiag.css.engine.ExtendedCSSEngine;
import org.eclipse.papyrus.infra.gmfdiag.css.helper.ParserHelper;
import org.eclipse.papyrus.infra.gmfdiag.css.notation.CSSStyles;
import org.eclipse.papyrus.infra.gmfdiag.css.resource.CSSNotationResource;
import org.eclipse.papyrus.infra.gmfdiag.css.style.CSSView;
import org.w3c.dom.css.CSSValue;
public class CSSViewDelegate implements CSSView {
private View view;
private ExtendedCSSEngine engine;
public CSSViewDelegate(View view, ExtendedCSSEngine engine) {
this.view = view;
this.engine = engine;
}
@Override
public boolean isCSSVisible() {
CSSValue cssValue = engine.retrievePropertyValue(view, "visible");
if (cssValue == null) {
Object defaultValue = NotationPackage.eINSTANCE.getView_Visible().getDefaultValue();
return (Boolean) defaultValue;
}
return (Boolean) engine.convert(cssValue, Boolean.class, null);
}
private boolean lookupStyle = false;
@Override
public NamedStyle getCSSNamedStyle(EClass eClass, String name) {
if (!CSSNotationResource.isCSSEnabled(view.eResource())) {
return null;
}
if (!NotationPackage.eINSTANCE.getNamedStyle().isSuperTypeOf(eClass)) {
return null;
}
// /////////////////////////////////////////////
// This method may call getNamedStyle() to retrieve the applied CSS Styles. Prevent overflow
if (CSSStyles.RESERVED_KEYWORDS.contains(name)) {
return null;
}
CSSValue cssValue;
synchronized (this) {
if (lookupStyle) {
return null;
}
try {
lookupStyle = true;
cssValue = engine.retrievePropertyValue(view, name);
if (cssValue == null) {
return null;
}
} finally {
lookupStyle = false;
}
}
// /////////////////////////////////////////////
try {
switch (eClass.getClassifierID()) {
case NotationPackage.BOOLEAN_VALUE_STYLE:
Boolean booleanValue = (Boolean) engine.convert(cssValue, Boolean.class, null);
BooleanValueStyle booleanStyle = NotationFactory.eINSTANCE.createBooleanValueStyle();
booleanStyle.setBooleanValue(booleanValue);
booleanStyle.setName(name);
return booleanStyle;
case NotationPackage.STRING_VALUE_STYLE:
String stringValue = (String) engine.convert(cssValue, String.class, null);
StringValueStyle stringStyle = NotationFactory.eINSTANCE.createStringValueStyle();
stringStyle.setName(name);
stringStyle.setStringValue(stringValue);
return stringStyle;
case NotationPackage.INT_VALUE_STYLE:
Integer intValue = (Integer) engine.convert(cssValue, Integer.class, null);
IntValueStyle intStyle = NotationFactory.eINSTANCE.createIntValueStyle();
intStyle.setName(name);
intStyle.setIntValue(intValue);
return intStyle;
case NotationPackage.DOUBLE_VALUE_STYLE:
Double doubleValue = (Double) engine.convert(cssValue, Double.class, null);
DoubleValueStyle doubleStyle = NotationFactory.eINSTANCE.createDoubleValueStyle();
doubleStyle.setName(name);
doubleStyle.setDoubleValue(doubleValue);
return doubleStyle;
case NotationPackage.STRING_LIST_VALUE_STYLE:
String[] values = ParserHelper.parseValues(engine, cssValue);
StringListValueStyle stringListStyle = NotationFactory.eINSTANCE.createStringListValueStyle();
stringListStyle.setName(name);
stringListStyle.getStringListValue().addAll(Arrays.asList(values));
return stringListStyle;
default:
return null;
}
} catch (Exception ex) {
Activator.log.error(ex);
return null;
}
}
/**
* For now, we support delegation of single-attribute styles:
* <ul>
* <li>{@link CanonicalStyle}</li>
* </ul>
*/
@Override
public Style getCSSStyle(EClass eClass) {
if (NotationPackage.Literals.NAMED_STYLE.isSuperTypeOf(eClass)) {
// Should use getCSSNamedStyle for these
return null;
}
if (!NotationPackage.Literals.STYLE.isSuperTypeOf(eClass)) {
// Not even a style. Sheesh
return null;
}
// Gate on supported single-attribute styles
switch (eClass.getClassifierID()) {
case NotationPackage.CANONICAL_STYLE:
break;
default:
return null;
}
// There is exactly one feature in this style (that's why we're here)
final String attrName = eClass.getEStructuralFeatures().get(0).getName();
// /////////////////////////////////////////////
// This method may call getNamedStyle() to retrieve the applied CSS Styles. Prevent overflow
CSSValue cssValue;
synchronized (this) {
if (lookupStyle) {
return null;
}
try {
lookupStyle = true;
cssValue = engine.retrievePropertyValue(view, attrName);
if (cssValue == null) {
return null;
}
} finally {
lookupStyle = false;
}
}
// /////////////////////////////////////////////
Style result = null;
try {
switch (eClass.getClassifierID()) {
case NotationPackage.CANONICAL_STYLE:
Boolean booleanValue = (Boolean) engine.convert(cssValue, Boolean.class, null);
CanonicalStyle canonicalStyle = NotationFactory.eINSTANCE.createCanonicalStyle();
canonicalStyle.setCanonical(booleanValue);
result = canonicalStyle;
break;
default:
break;
}
} catch (Exception e) {
Activator.log.error(e);
}
return result;
}
}
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