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SymbolsLabelProvider.java
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SymbolsLabelProvider.java
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/*******************************************************************************
* Copyright (c) 2016, 2023 Red Hat Inc. and others.
* This program and the accompanying materials are made
* available under the terms of the Eclipse Public License 2.0
* which is available at https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Mickael Istria (Red Hat Inc.) - initial implementation
*******************************************************************************/
package org.eclipse.lsp4e.outline;
import java.net.URI;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.IResourceDelta;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.preferences.IEclipsePreferences.IPreferenceChangeListener;
import org.eclipse.core.runtime.preferences.IEclipsePreferences.PreferenceChangeEvent;
import org.eclipse.core.runtime.preferences.InstanceScope;
import org.eclipse.jdt.annotation.NonNull;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.viewers.DecorationOverlayIcon;
import org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider.IStyledLabelProvider;
import org.eclipse.jface.viewers.IDecoration;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.LabelProviderChangedEvent;
import org.eclipse.jface.viewers.StyledString;
import org.eclipse.lsp4e.LSPEclipseUtils;
import org.eclipse.lsp4e.LanguageServerPlugin;
import org.eclipse.lsp4e.internal.StyleUtil;
import org.eclipse.lsp4e.outline.SymbolsModel.DocumentSymbolWithURI;
import org.eclipse.lsp4e.ui.LSPImages;
import org.eclipse.lsp4e.ui.Messages;
import org.eclipse.lsp4j.DocumentSymbol;
import org.eclipse.lsp4j.Location;
import org.eclipse.lsp4j.Range;
import org.eclipse.lsp4j.SymbolInformation;
import org.eclipse.lsp4j.SymbolKind;
import org.eclipse.lsp4j.SymbolTag;
import org.eclipse.lsp4j.WorkspaceSymbol;
import org.eclipse.lsp4j.WorkspaceSymbolLocation;
import org.eclipse.lsp4j.jsonrpc.messages.Either;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.internal.progress.ProgressManager;
import org.eclipse.ui.navigator.ICommonContentExtensionSite;
import org.eclipse.ui.navigator.ICommonLabelProvider;
import org.eclipse.ui.progress.PendingUpdateAdapter;
import com.google.common.collect.RangeMap;
import com.google.common.collect.TreeRangeMap;
public class SymbolsLabelProvider extends LabelProvider
implements ICommonLabelProvider, IStyledLabelProvider, IPreferenceChangeListener {
private final Map<IResource, RangeMap<Integer, Integer>> severities = new HashMap<>();
private final IResourceChangeListener listener = e -> {
try {
IResourceDelta delta = e.getDelta();
if (delta != null) {
delta.accept(d -> {
if (d.getMarkerDeltas().length > 0) {
severities.remove(d.getResource());
}
return true;
});
}
} catch (CoreException ex) {
LanguageServerPlugin.logError(ex);
}
};
/*
* key: initial object image
* value: array of images decorated with marker for severity (index + 1)
*/
private final Map<Image, Image[]> overlays = new HashMap<>();
private final boolean showLocation;
private boolean showKind;
public SymbolsLabelProvider() {
this(false, InstanceScope.INSTANCE.getNode(LanguageServerPlugin.PLUGIN_ID)
.getBoolean(CNFOutlinePage.SHOW_KIND_PREFERENCE, false));
}
public SymbolsLabelProvider(boolean showLocation, boolean showKind) {
this.showLocation = showLocation;
this.showKind = showKind;
InstanceScope.INSTANCE.getNode(LanguageServerPlugin.PLUGIN_ID).addPreferenceChangeListener(this);
ResourcesPlugin.getWorkspace().addResourceChangeListener(listener);
}
@Override
public void dispose() {
ResourcesPlugin.getWorkspace().removeResourceChangeListener(listener);
InstanceScope.INSTANCE.getNode(LanguageServerPlugin.PLUGIN_ID).removePreferenceChangeListener(this);
overlays.values().stream().flatMap(Arrays::stream).filter(Objects::nonNull).forEach(Image::dispose);
overlays.clear();
super.dispose();
}
@Override
public Image getImage(Object element) {
if (element == null){
return null;
}
if (element instanceof PendingUpdateAdapter) {
return JFaceResources.getImage(ProgressManager.WAITING_JOB_KEY);
}
if (element instanceof Throwable) {
return LSPImages.getSharedImage(ISharedImages.IMG_OBJS_ERROR_TSK);
}
if (element instanceof Either<?, ?> either) {
element = either.get();
}
Image res = null;
if (element instanceof SymbolInformation info) {
res = LSPImages.imageFromSymbolKind(info.getKind());
} else if (element instanceof WorkspaceSymbol symbol) {
res = LSPImages.imageFromSymbolKind(symbol.getKind());
} else if (element instanceof DocumentSymbol symbol) {
res = LSPImages.imageFromSymbolKind(symbol.getKind());
} else if (element instanceof DocumentSymbolWithURI symbolWithURI) {
res = LSPImages.imageFromSymbolKind(symbolWithURI.symbol.getKind());
}
IResource file = null;
if (element instanceof SymbolInformation symbol) {
file = LSPEclipseUtils.findResourceFor(symbol.getLocation().getUri());
} else if (element instanceof WorkspaceSymbol symbol) {
file = LSPEclipseUtils.findResourceFor(getUri(symbol));
} else if (element instanceof DocumentSymbolWithURI symbolWithURI) {
file = LSPEclipseUtils.findResourceFor(symbolWithURI.uri);
}
/*
* Implementation node: for problem decoration,m aybe consider using a ILabelDecorator/IDelayedLabelDecorator?
*/
if (file != null) {
Range range = null;
if (element instanceof SymbolInformation symbol) {
range = symbol.getLocation().getRange();
} else if (element instanceof WorkspaceSymbol symbol && symbol.getLocation().isLeft()) {
range = symbol.getLocation().getLeft().getRange();
} else if (element instanceof DocumentSymbol documentSymbol) {
range = documentSymbol.getRange();
} else if (element instanceof DocumentSymbolWithURI symbolWithURI) {
range = symbolWithURI.symbol.getRange();
}
if (range != null) {
try {
// use existing documents only to calculate the severity
// to avoid extra documents being created (and connected
// to the language server just for this (bug 550968)
IDocument doc = LSPEclipseUtils.getExistingDocument(file);
if (doc != null) {
int maxSeverity = getMaxSeverity(file, doc, range);
if (maxSeverity > IMarker.SEVERITY_INFO) {
return getOverlay(res, maxSeverity);
}
}
} catch (CoreException | BadLocationException e) {
LanguageServerPlugin.logError(e);
}
}
}
return res;
}
protected int getMaxSeverity(@NonNull IResource resource, @NonNull IDocument doc, @NonNull Range range)
throws CoreException, BadLocationException {
if (!severities.containsKey(resource)) {
refreshMarkersByLine(resource);
}
RangeMap<Integer, Integer> severitiesForResource = severities.get(resource);
if (severitiesForResource == null) {
return -1;
}
int bound1 = LSPEclipseUtils.toOffset(range.getStart(), doc);
int bound2 = LSPEclipseUtils.toOffset(range.getEnd(), doc);
// using bounds here because doc may have changed in the meantime so toOffset can return wrong results.
com.google.common.collect.Range<Integer> subRange = com.google.common.collect.Range.closed(
Math.min(bound1, bound2), // we guard that lower <= endOffset
bound2);
return severitiesForResource.subRangeMap(subRange)
.asMapOfRanges()
.values()
.stream()
.max(Comparator.naturalOrder())
.orElse(-1);
}
private void refreshMarkersByLine(IResource resource) throws CoreException {
RangeMap<Integer, Integer> rangeMap = TreeRangeMap.create();
Arrays.stream(resource.findMarkers(IMarker.PROBLEM, true, IResource.DEPTH_ZERO))
.filter(marker -> marker.getAttribute(IMarker.SEVERITY, -1) > IMarker.SEVERITY_INFO)
.sorted(Comparator.comparingInt(marker -> marker.getAttribute(IMarker.SEVERITY, -1)))
.forEach(marker -> {
int start = marker.getAttribute(IMarker.CHAR_START, -1);
int end = marker.getAttribute(IMarker.CHAR_END, -1);
if (end < start) {
end = start;
}
int severity = marker.getAttribute(IMarker.SEVERITY, -1);
if (start != end) {
com.google.common.collect.Range<Integer> markerRange = com.google.common.collect.Range.closed(start,end - 1);
rangeMap.remove(markerRange);
rangeMap.put(markerRange, severity);
}
});
severities.put(resource, rangeMap);
}
private Image getOverlay(Image res, int maxSeverity) {
if (maxSeverity != 1 && maxSeverity != 2) {
throw new IllegalArgumentException("Severity " + maxSeverity + " not supported."); //$NON-NLS-1$ //$NON-NLS-2$
}
Image[] currentOverlays = this.overlays.computeIfAbsent(res, key -> new Image[2]);
if (currentOverlays[maxSeverity - 1] == null) {
String overlayId = null;
if (maxSeverity == IMarker.SEVERITY_ERROR) {
overlayId = ISharedImages.IMG_DEC_FIELD_ERROR;
} else if (maxSeverity == IMarker.SEVERITY_WARNING) {
overlayId = ISharedImages.IMG_DEC_FIELD_WARNING;
}
currentOverlays[maxSeverity - 1] = new DecorationOverlayIcon(res,
LSPImages.getSharedImageDescriptor(overlayId), IDecoration.BOTTOM_LEFT).createImage();
}
return currentOverlays[maxSeverity - 1];
}
@Override
public String getText(Object element) {
return getStyledText(element).getString();
}
@Override
public StyledString getStyledText(Object element) {
if (element instanceof PendingUpdateAdapter) {
return new StyledString(Messages.outline_computingSymbols);
}
if (element instanceof Throwable throwable) {
String message = throwable.getMessage();
if (message == null) {
message = element.getClass().getName();
}
return new StyledString(message);
}
final var res = new StyledString();
if (element == null){
return res;
}
if (element instanceof Either<?, ?> either) {
element = either.get();
}
String name = null;
SymbolKind kind = null;
String detail = null;
URI location = null;
boolean deprecated = false;
if (element instanceof SymbolInformation symbolInformation) {
name = symbolInformation.getName();
kind = symbolInformation.getKind();
deprecated = isDeprecated(symbolInformation.getTags()) || symbolInformation.getDeprecated() == null ? false: symbolInformation.getDeprecated();
try {
location = URI.create(symbolInformation.getLocation().getUri());
} catch (IllegalArgumentException e) {
LanguageServerPlugin.logError("Invalid URI: " + symbolInformation.getLocation().getUri(), e); //$NON-NLS-1$
}
} else if (element instanceof WorkspaceSymbol workspaceSymbol) {
name = workspaceSymbol.getName();
kind = workspaceSymbol.getKind();
String rawUri = getUri(workspaceSymbol);
deprecated = isDeprecated(workspaceSymbol.getTags());
try {
location = URI.create(rawUri);
} catch (IllegalArgumentException e) {
LanguageServerPlugin.logError("Invalid URI: " + rawUri, e); //$NON-NLS-1$
}
} else if (element instanceof DocumentSymbol documentSymbol) {
name = documentSymbol.getName();
kind = documentSymbol.getKind();
detail = documentSymbol.getDetail();
deprecated = isDeprecated(documentSymbol.getTags()) || documentSymbol.getDeprecated() == null ? false: documentSymbol.getDeprecated();
} else if (element instanceof DocumentSymbolWithURI symbolWithURI) {
name = symbolWithURI.symbol.getName();
kind = symbolWithURI.symbol.getKind();
detail = symbolWithURI.symbol.getDetail();
location = symbolWithURI.uri;
deprecated = isDeprecated(symbolWithURI.symbol.getTags()) || symbolWithURI.symbol.getDeprecated() == null ? false: symbolWithURI.symbol.getDeprecated();
}
if (name != null) {
if (deprecated) {
res.append(name, StyleUtil.DEPRECATE);
} else {
res.append(name, null);
}
}
if (detail != null) {
res.append(' ');
res.append(detail, StyledString.DECORATIONS_STYLER);
}
if (showKind && kind != null) {
res.append(" :", null); //$NON-NLS-1$
res.append(kind.toString(), StyledString.DECORATIONS_STYLER);
}
if (showLocation && location != null) {
res.append(' ');
res.append(location.getPath(), StyledString.QUALIFIER_STYLER);
}
return res;
}
private boolean isDeprecated(List<SymbolTag> tags) {
if(tags != null){
return tags.contains(SymbolTag.Deprecated);
}
return false;
}
@Override
public void restoreState(IMemento aMemento) {
}
@Override
public void saveState(IMemento aMemento) {
}
@Override
public String getDescription(Object anElement) {
return null;
}
@Override
public void init(ICommonContentExtensionSite aConfig) {
}
@Override
public void preferenceChange(PreferenceChangeEvent event) {
if (event.getKey().equals(CNFOutlinePage.SHOW_KIND_PREFERENCE)) {
this.showKind = Boolean.valueOf(event.getNewValue().toString());
for (Object listener : this.getListeners()) {
if (listener instanceof ILabelProviderListener labelProviderListener) {
labelProviderListener.labelProviderChanged(new LabelProviderChangedEvent(this));
}
}
}
}
private static String getUri(WorkspaceSymbol symbol) {
return symbol.getLocation().map(Location::getUri, WorkspaceSymbolLocation::getUri);
}
}