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// Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
package com.intellij.debugger.engine;
import com.intellij.debugger.MultiRequestPositionManager;
import com.intellij.debugger.NoDataException;
import com.intellij.debugger.PositionManager;
import com.intellij.debugger.SourcePosition;
import com.intellij.debugger.engine.evaluation.EvaluationContext;
import com.intellij.debugger.impl.DebuggerUtilsEx;
import com.intellij.debugger.impl.DebuggerUtilsImpl;
import com.intellij.debugger.jdi.StackFrameProxyImpl;
import com.intellij.debugger.requests.ClassPrepareRequestor;
import com.intellij.debugger.ui.impl.watch.StackFrameDescriptorImpl;
import com.intellij.execution.filters.LineNumbersMapping;
import com.intellij.openapi.application.ReadAction;
import com.intellij.openapi.fileTypes.FileType;
import com.intellij.openapi.fileTypes.FileTypeManager;
import com.intellij.openapi.progress.ProgressManager;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiFile;
import com.intellij.util.ThreeState;
import com.intellij.xdebugger.frame.XStackFrame;
import com.sun.jdi.Location;
import com.sun.jdi.ReferenceType;
import com.sun.jdi.request.ClassPrepareRequest;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.*;
public class CompoundPositionManager implements PositionManagerWithConditionEvaluation, MultiRequestPositionManager {
public static final CompoundPositionManager EMPTY = new CompoundPositionManager();
private final ArrayList<PositionManager> myPositionManagers = new ArrayList<>();
@SuppressWarnings("UnusedDeclaration")
public CompoundPositionManager() {
}
public CompoundPositionManager(PositionManager manager) {
appendPositionManager(manager);
}
public void appendPositionManager(PositionManager manager) {
myPositionManagers.remove(manager);
myPositionManagers.add(0, manager);
clearCache();
}
void removePositionManager(PositionManager manager) {
myPositionManagers.remove(manager);
clearCache();
}
public void clearCache() {
DebuggerManagerThreadImpl.assertIsManagerThread();
mySourcePositionCache.clear();
}
private final Map<Location, SourcePosition> mySourcePositionCache = new WeakHashMap<>();
private interface Producer<T> {
T produce(PositionManager positionManager) throws NoDataException;
}
private <T> T iterate(Producer<? extends T> processor, T defaultValue, @Nullable SourcePosition position) {
FileType fileType = position != null ? position.getFile().getFileType() : null;
return iterate(processor, defaultValue, fileType, true);
}
private <T> T iterate(Producer<? extends T> processor, T defaultValue, @Nullable FileType fileType, boolean ignorePCE) {
for (PositionManager positionManager : myPositionManagers) {
if (fileType != null) {
Set<? extends FileType> types = positionManager.getAcceptedFileTypes();
if (types != null && !types.contains(fileType)) {
continue;
}
}
try {
if (!ignorePCE) {
ProgressManager.checkCanceled();
}
return DebuggerUtilsImpl.suppressExceptions(() -> processor.produce(positionManager), defaultValue, ignorePCE, NoDataException.class);
}
catch (NoDataException ignored) {
}
}
return defaultValue;
}
@Nullable
@Override
public SourcePosition getSourcePosition(final Location location) {
if (location == null) return null;
return ReadAction.nonBlocking(() -> {
SourcePosition res = null;
try {
res = mySourcePositionCache.get(location);
}
catch (IllegalArgumentException ignored) { // Invalid method id
}
if (checkCacheEntry(res, location)) return res;
String sourceName = DebuggerUtilsEx.getSourceName(location, e -> null);
FileType fileType = sourceName != null ? FileTypeManager.getInstance().getFileTypeByFileName(sourceName) : null;
return iterate(positionManager -> {
SourcePosition res1 = positionManager.getSourcePosition(location);
try {
mySourcePositionCache.put(location, res1);
}
catch (IllegalArgumentException ignored) { // Invalid method id
}
return res1;
}, null, fileType, false);
}).executeSynchronously();
}
private static boolean checkCacheEntry(@Nullable SourcePosition position, @NotNull Location location) {
if (position == null) return false;
PsiFile psiFile = position.getFile();
if (!psiFile.isValid()) return false;
String url = DebuggerUtilsEx.getAlternativeSourceUrl(location.declaringType().name(), psiFile.getProject());
if (url == null) return true;
VirtualFile file = psiFile.getVirtualFile();
return file != null && url.equals(file.getUrl());
}
@Override
@NotNull
public List<ReferenceType> getAllClasses(@NotNull final SourcePosition classPosition) {
return iterate(positionManager -> positionManager.getAllClasses(classPosition), Collections.emptyList(), classPosition);
}
@Override
@NotNull
public List<Location> locationsOfLine(@NotNull final ReferenceType type, @NotNull SourcePosition position) {
VirtualFile file = position.getFile().getVirtualFile();
if (file != null) {
LineNumbersMapping mapping = file.getUserData(LineNumbersMapping.LINE_NUMBERS_MAPPING_KEY);
if (mapping != null) {
int line = mapping.sourceToBytecode(position.getLine() + 1);
if (line > -1) {
position = SourcePosition.createFromLine(position.getFile(), line - 1);
}
}
}
final SourcePosition finalPosition = position;
return iterate(positionManager -> positionManager.locationsOfLine(type, finalPosition), Collections.emptyList(), position);
}
@Override
public ClassPrepareRequest createPrepareRequest(@NotNull final ClassPrepareRequestor requestor, @NotNull final SourcePosition position) {
return iterate(positionManager -> positionManager.createPrepareRequest(requestor, position), null, position);
}
@NotNull
@Override
public List<ClassPrepareRequest> createPrepareRequests(@NotNull final ClassPrepareRequestor requestor, @NotNull final SourcePosition position) {
return iterate(positionManager -> {
if (positionManager instanceof MultiRequestPositionManager) {
return ((MultiRequestPositionManager)positionManager).createPrepareRequests(requestor, position);
}
else {
ClassPrepareRequest prepareRequest = positionManager.createPrepareRequest(requestor, position);
if (prepareRequest == null) {
return Collections.emptyList();
}
return Collections.singletonList(prepareRequest);
}
}, Collections.emptyList(), position);
}
@NotNull
public List<XStackFrame> createStackFrames(@NotNull StackFrameDescriptorImpl descriptor) {
Location location = descriptor.getLocation();
return iterate(positionManager -> {
if (positionManager instanceof PositionManagerWithMultipleStackFrames && location != null) {
List<XStackFrame> stackFrames = ((PositionManagerWithMultipleStackFrames)positionManager).createStackFrames(
descriptor.getFrameProxy(), (DebugProcessImpl)descriptor.getDebugProcess(), location
);
if (stackFrames != null) {
return stackFrames;
}
}
else if (positionManager instanceof PositionManagerEx) {
XStackFrame xStackFrame = ((PositionManagerEx)positionManager).createStackFrame(descriptor);
if (xStackFrame != null) {
return Collections.singletonList(xStackFrame);
}
}
throw NoDataException.INSTANCE;
}, Collections.emptyList(), null, false);
}
@Override
public ThreeState evaluateCondition(@NotNull EvaluationContext context,
@NotNull StackFrameProxyImpl frame,
@NotNull Location location,
@NotNull String expression) {
for (PositionManager positionManager : myPositionManagers) {
if (positionManager instanceof PositionManagerWithConditionEvaluation) {
try {
PositionManagerWithConditionEvaluation manager = (PositionManagerWithConditionEvaluation)positionManager;
ThreeState result = manager.evaluateCondition(context, frame, location, expression);
if (result != ThreeState.UNSURE) {
return result;
}
}
catch (Throwable e) {
DebuggerUtilsImpl.logError(e);
}
}
}
return ThreeState.UNSURE;
}
}
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