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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.engine;
import com.intellij.debugger.SourcePosition;
import com.intellij.debugger.engine.evaluation.EvaluateException;
import com.intellij.debugger.engine.jdi.StackFrameProxy;
import com.intellij.debugger.jdi.LocalVariableProxyImpl;
import com.intellij.debugger.jdi.StackFrameProxyImpl;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.project.IndexNotReadyException;
import com.intellij.openapi.util.Comparing;
import com.intellij.openapi.util.Key;
import com.intellij.psi.*;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.StringBuilderSpinAllocator;
import com.sun.jdi.Location;
import org.jetbrains.annotations.Nullable;
import java.util.List;
public class ContextUtil {
public static final Key<Boolean> IS_JSP_IMPLICIT = new Key<Boolean>("JspImplicit");
private static final Logger LOG = Logger.getInstance("#com.intellij.debugger.impl.PositionUtil");
@Nullable
public static SourcePosition getSourcePosition(@Nullable final StackFrameContext context) {
if (context == null) {
return null;
}
DebugProcessImpl debugProcess = (DebugProcessImpl)context.getDebugProcess();
if(debugProcess == null) {
return null;
}
final StackFrameProxy frameProxy = context.getFrameProxy();
if(frameProxy == null) {
return null;
}
Location location = null;
try {
location = frameProxy.location();
}
catch (Throwable e) {
LOG.debug(e);
}
final CompoundPositionManager positionManager = debugProcess.getPositionManager();
if (positionManager == null) {
// process already closed
return null;
}
try {
return positionManager.getSourcePosition(location);
}
catch (IndexNotReadyException ignored) {
return null;
}
}
@Nullable
public static PsiElement getContextElement(final StackFrameContext context) {
return getContextElement(context, getSourcePosition(context));
}
@Nullable
protected static PsiElement getContextElement(final StackFrameContext context, final SourcePosition position) {
if(LOG.isDebugEnabled()) {
final SourcePosition sourcePosition = getSourcePosition(context);
LOG.assertTrue(Comparing.equal(sourcePosition, position));
}
final PsiElement element = getContextElement(position);
if(element == null) {
return null;
}
final StackFrameProxyImpl frameProxy = (StackFrameProxyImpl)context.getFrameProxy();
if(frameProxy == null) {
return element;
}
final StringBuilder buf = StringBuilderSpinAllocator.alloc();
try {
List<LocalVariableProxyImpl> list = frameProxy.visibleVariables();
PsiResolveHelper resolveHelper = JavaPsiFacade.getInstance(element.getProject()).getResolveHelper();
buf.append('{');
for (LocalVariableProxyImpl localVariable : list) {
final String varName = localVariable.name();
if (resolveHelper.resolveReferencedVariable(varName, element) == null) {
buf.append(localVariable.getVariable().typeName()).append(" ").append(varName).append(";");
}
}
buf.append('}');
if (buf.length() <= 2) {
return element;
}
final PsiElementFactory elementFactory = JavaPsiFacade.getInstance(element.getProject()).getElementFactory();
final PsiCodeBlock codeBlockFromText = elementFactory.createCodeBlockFromText(buf.toString(), element);
final PsiStatement[] statements = codeBlockFromText.getStatements();
for (PsiStatement statement : statements) {
if (statement instanceof PsiDeclarationStatement) {
PsiDeclarationStatement declStatement = (PsiDeclarationStatement)statement;
PsiElement[] declaredElements = declStatement.getDeclaredElements();
for (PsiElement declaredElement : declaredElements) {
declaredElement.putUserData(IS_JSP_IMPLICIT, Boolean.TRUE);
}
}
}
return codeBlockFromText;
}
catch (IncorrectOperationException ignored) {
return element;
}
catch (EvaluateException ignored) {
return element;
}
finally {
StringBuilderSpinAllocator.dispose(buf);
}
}
@Nullable
public static PsiElement getContextElement(@Nullable SourcePosition position) {
return position == null ? null : position.getElementAt();
}
public static boolean isJspImplicit(PsiElement element) {
return Boolean.TRUE.equals(element.getUserData(IS_JSP_IMPLICIT));
}
}
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