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/*
* Copyright 2000-2009 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.debugger.ui.impl.watch;
import com.intellij.debugger.DebuggerBundle;
import com.intellij.debugger.DebuggerContext;
import com.intellij.debugger.SourcePosition;
import com.intellij.debugger.engine.ContextUtil;
import com.intellij.debugger.engine.evaluation.EvaluateException;
import com.intellij.debugger.engine.evaluation.EvaluationContextImpl;
import com.intellij.debugger.impl.PositionUtil;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.project.Project;
import com.intellij.psi.*;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.util.IncorrectOperationException;
import com.sun.jdi.PrimitiveValue;
import com.sun.jdi.Value;
import java.util.HashSet;
import java.util.Set;
import java.util.Stack;
public class ArgumentValueDescriptorImpl extends ValueDescriptorImpl{
private final int myIndex;
private final Value myValue;
private String myName;
private boolean myParameterNameCalcutated;
private final String myDefaultName;
public ArgumentValueDescriptorImpl(Project project, int index, Value value, String name) {
super(project);
myIndex = index;
myValue = value;
myDefaultName = name != null ? name : "arg" + String.valueOf(index);
myName = myDefaultName;
setLvalue(true);
}
public boolean isPrimitive() {
return myValue instanceof PrimitiveValue;
}
public Value calcValue(final EvaluationContextImpl evaluationContext) throws EvaluateException {
ApplicationManager.getApplication().runReadAction(new Runnable() {
public void run() {
final SourcePosition position = ContextUtil.getSourcePosition(evaluationContext);
if (position != null) {
final PsiMethod method = PsiTreeUtil.getParentOfType(position.getElementAt(), PsiMethod.class);
if (method != null) {
final PsiParameterList params = method.getParameterList();
if (myIndex < params.getParametersCount()) {
final PsiParameter param = params.getParameters()[myIndex];
myName = param.getName();
myParameterNameCalcutated = true;
}
else {
// treat myIndex as a variable slot index
final PsiCodeBlock body = method.getBody();
if (body != null) {
final StringBuilder nameBuilder = new StringBuilder();
try {
final int startSlot = params.getParametersCount() + (method.hasModifierProperty(PsiModifier.STATIC)? 0 : 1);
body.accept(new LocalVariableNameFinder(startSlot, nameBuilder));
}
finally {
myName = nameBuilder.length() > 0? myDefaultName + ": " + nameBuilder.toString() : myDefaultName;
}
}
}
}
}
}
});
return myValue;
}
public String getName() {
return myName;
}
public String calcValueName() {
return getName();
}
public PsiExpression getDescriptorEvaluation(DebuggerContext context) throws EvaluateException {
if (!myParameterNameCalcutated) {
return null;
}
PsiElementFactory elementFactory = JavaPsiFacade.getInstance(context.getProject()).getElementFactory();
try {
return elementFactory.createExpressionFromText(getName(), PositionUtil.getContextElement(context));
}
catch (IncorrectOperationException e) {
throw new EvaluateException(DebuggerBundle.message("error.invalid.local.variable.name", getName()), e);
}
}
private class LocalVariableNameFinder extends JavaRecursiveElementVisitor {
private final int myStartSlot;
private final StringBuilder myNameBuilder;
private final Set<String> myVisitedNames = new HashSet<String>();
private int myCurrentSlotIndex;
private final Stack<Integer> myIndexStack;
public LocalVariableNameFinder(int startSlot, StringBuilder nameBuilder) {
myStartSlot = startSlot;
myNameBuilder = nameBuilder;
myCurrentSlotIndex = myStartSlot;
myIndexStack = new Stack<Integer>();
}
@Override
public void visitLocalVariable(PsiLocalVariable variable) {
appendName(variable.getName());
final PsiType varType = variable.getType();
myCurrentSlotIndex += (varType == PsiType.DOUBLE || varType == PsiType.LONG)? 2 : 1;
}
public void visitSynchronizedStatement(PsiSynchronizedStatement statement) {
appendName("<monitor>");
myCurrentSlotIndex++;
super.visitSynchronizedStatement(statement);
}
private void appendName(String varName) {
if (myCurrentSlotIndex == myIndex && myVisitedNames.add(varName)) {
if (myNameBuilder.length() != 0) {
myNameBuilder.append(" | ");
}
myNameBuilder.append(varName);
}
}
@Override
public void visitCodeBlock(PsiCodeBlock block) {
myIndexStack.push(myCurrentSlotIndex);
try {
super.visitCodeBlock(block);
}
finally {
myCurrentSlotIndex = myIndexStack.pop();
}
}
@Override
public void visitForStatement(PsiForStatement statement) {
myIndexStack.push(myCurrentSlotIndex);
try {
super.visitForStatement(statement);
}
finally {
myCurrentSlotIndex = myIndexStack.pop();
}
}
@Override
public void visitForeachStatement(PsiForeachStatement statement) {
myIndexStack.push(myCurrentSlotIndex);
try {
super.visitForeachStatement(statement);
}
finally {
myCurrentSlotIndex = myIndexStack.pop();
}
}
@Override
public void visitCatchSection(PsiCatchSection section) {
myIndexStack.push(myCurrentSlotIndex);
try {
super.visitCatchSection(section);
}
finally {
myCurrentSlotIndex = myIndexStack.pop();
}
}
@Override
public void visitResourceList(PsiResourceList resourceList) {
myIndexStack.push(myCurrentSlotIndex);
try {
super.visitResourceList(resourceList);
}
finally {
myCurrentSlotIndex = myIndexStack.pop();
}
}
@Override
public void visitClass(PsiClass aClass) {
// skip local and anonymous classes
}
}
}
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