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/********************************************************************************
* Copyright (c) 2019 Lakshminarayana Nekkanti(narayana.nekkanti@gmail.com)
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* SPDX-License-Identifier: EPL-2.0 3
*
* Contributor
* Lakshminarayana Nekkanti - initial API and implementation
********************************************************************************/
package org.eclipse.ui.internal.genericeditor;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.content.IContentType;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ResourceLocator;
public class IconsRegistry {
private static final String EXTENSION_POINT_ID = GenericEditorPlugin.BUNDLE_ID + ".icons"; //$NON-NLS-1$
private Map<IContentType, ImageDescriptor> extensions = new LinkedHashMap<>();
private boolean outOfSync = true;
public IconsRegistry() {
Platform.getExtensionRegistry().addRegistryChangeListener(event -> outOfSync = true, EXTENSION_POINT_ID);
}
public ImageDescriptor getImageDescriptor(IContentType[] contentTypes) {
if (this.outOfSync) {
sync();
}
return Arrays.stream(contentTypes).sorted(Collections.reverseOrder(Comparator.comparingInt(ContentTypeSpecializationComparator::depth))).map(extensions::get).filter(Objects::nonNull).findFirst().orElse(null);
}
private void sync() {
Set<IContentType> toRemoveContentTypes = new HashSet<>(this.extensions.keySet());
for (IConfigurationElement extension : Platform.getExtensionRegistry().getConfigurationElementsFor(EXTENSION_POINT_ID)) {
try {
final String contentTypeId = extension.getAttribute(GenericContentTypeRelatedExtension.CONTENT_TYPE_ATTRIBUTE);
if (contentTypeId == null || contentTypeId.isEmpty()) {
continue;
}
final IContentType contentType = Platform.getContentTypeManager().getContentType(contentTypeId);
if (contentType == null) {
continue;
}
toRemoveContentTypes.remove(contentType);
if (!this.extensions.containsKey(contentType)) {
final String icon = extension.getAttribute("icon"); //$NON-NLS-1$
if (icon == null || icon.isEmpty()) {
continue;
}
ResourceLocator.imageDescriptorFromBundle(extension.getNamespaceIdentifier(), icon).ifPresent(imageDescriptor -> this.extensions.put(contentType, imageDescriptor));
}
} catch (Exception ex) {
GenericEditorPlugin.getDefault().getLog().log(new Status(IStatus.ERROR, GenericEditorPlugin.BUNDLE_ID, ex.getMessage(), ex));
}
}
for (IContentType toRemove : toRemoveContentTypes) {
this.extensions.remove(toRemove);
}
this.outOfSync = false;
}
}
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