/*******************************************************************************
* Copyright (c) 2014, 2016 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.e4.ui.css.swt.properties.preference;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.core.runtime.preferences.IEclipsePreferences;
import org.eclipse.e4.ui.css.core.dom.properties.ICSSPropertyHandler;
import org.eclipse.e4.ui.css.core.engine.CSSEngine;
import org.eclipse.e4.ui.css.swt.dom.preference.EclipsePreferencesElement;
import org.eclipse.e4.ui.css.swt.helpers.EclipsePreferencesHelper;
import org.w3c.dom.css.CSSValue;
import org.w3c.dom.css.CSSValueList;
public class EclipsePreferencesHandler implements ICSSPropertyHandler {
public final static String PREFERENCES_PROP = "preferences";
private final static Pattern PROPERTY_NAME_AND_VALUE_PATTERN = Pattern
.compile("(.+)\\s*=\\s*(.*)");
@Override
public boolean applyCSSProperty(Object element, String property, CSSValue value, String pseudo, CSSEngine engine) {
if (!property.equals(PREFERENCES_PROP) || !(element instanceof EclipsePreferencesElement)) {
return false;
}
IEclipsePreferences preferences = (IEclipsePreferences) ((EclipsePreferencesElement) element).getNativeWidget();
if (value.getCssValueType() == CSSValue.CSS_VALUE_LIST) {
CSSValueList list = (CSSValueList) value;
for (int i = 0; i < list.getLength(); i++) {
overrideProperty(preferences, list.item(i));
}
} else {
overrideProperty(preferences, value);
}
return true;
}
protected void overrideProperty(IEclipsePreferences preferences, CSSValue value) {
Matcher matcher = PROPERTY_NAME_AND_VALUE_PATTERN.matcher(value.getCssText());
if (matcher.find()) {
overrideProperty(preferences, matcher.group(1).trim(), matcher.group(2).trim());
}
}
protected void overrideProperty(IEclipsePreferences preferences, String name, String value) {
if (preferences.get(name, null) == null || EclipsePreferencesHelper.isThemeChanged()) {
preferences.put(name, value);
EclipsePreferencesHelper.appendOverriddenPropertyName(preferences, name);
}
}
}