/*
* Copyright 2013-2017 consulo.io
*
* 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 consulo.csharp.ide.refactoring.util;
import gnu.trove.THashSet;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import consulo.csharp.lang.psi.CSharpRecursiveElementVisitor;
import consulo.csharp.lang.psi.CSharpReferenceExpression;
import consulo.csharp.lang.psi.UsefulPsiTreeUtil;
import consulo.csharp.lang.psi.impl.source.CSharpMethodCallExpressionImpl;
import consulo.dotnet.psi.DotNetExpression;
import consulo.dotnet.psi.DotNetStatement;
import com.intellij.lang.ASTNode;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiNamedElement;
import com.intellij.psi.PsiWhiteSpace;
import com.intellij.psi.ResolveState;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.util.Function;
import com.intellij.util.containers.ContainerUtil;
/**
* @author Fedor.Korotkov
*
* from google dart
*/
public class CSharpRefactoringUtil
{
public static Set<String> collectUsedNames(@NotNull PsiElement context, @Nullable PsiElement toSkip)
{
return new THashSet<String>(ContainerUtil.map(collectUsedComponents(context, toSkip), new Function<PsiNamedElement, String>()
{
@Nullable
@Override
public String fun(PsiNamedElement componentName)
{
return componentName.getName();
}
}));
}
public static Set<PsiNamedElement> collectUsedComponents(@NotNull PsiElement context, @Nullable PsiElement toSkip)
{
final Set<PsiNamedElement> usedComponentNames = new THashSet<PsiNamedElement>();
PsiTreeUtil.treeWalkUp(new ComponentNameScopeProcessor(usedComponentNames, toSkip), context, null, new ResolveState());
return usedComponentNames;
}
@Nullable
public static DotNetExpression getSelectedExpression(@NotNull final Project project,
@NotNull PsiFile file,
@NotNull final PsiElement element1,
@NotNull final PsiElement element2)
{
PsiElement parent = PsiTreeUtil.findCommonParent(element1, element2);
if(parent == null)
{
return null;
}
if(parent instanceof DotNetExpression)
{
return (DotNetExpression) parent;
}
return PsiTreeUtil.getParentOfType(parent, DotNetExpression.class);
}
@NotNull
public static List<PsiElement> getOccurrences(@NotNull final PsiElement pattern, @Nullable final PsiElement context)
{
if(context == null)
{
return Collections.emptyList();
}
final List<PsiElement> occurrences = new ArrayList<PsiElement>();
context.acceptChildren(new CSharpRecursiveElementVisitor()
{
@Override
public void visitReferenceExpression(CSharpReferenceExpression expression)
{
if(expression.resolve() == pattern)
{
occurrences.add(expression);
}
}
});
return occurrences;
}
@Nullable
public static PsiElement findOccurrenceUnderCaret(List<PsiElement> occurrences, Editor editor)
{
if(occurrences.isEmpty())
{
return null;
}
int offset = editor.getCaretModel().getOffset();
for(PsiElement occurrence : occurrences)
{
if(occurrence.getTextRange().contains(offset))
{
return occurrence;
}
}
int line = editor.getDocument().getLineNumber(offset);
for(PsiElement occurrence : occurrences)
{
if(occurrence.isValid() && editor.getDocument().getLineNumber(occurrence.getTextRange().getStartOffset()) == line)
{
return occurrence;
}
}
for(PsiElement occurrence : occurrences)
{
if(occurrence.isValid())
{
return occurrence;
}
}
return null;
}
public static PsiElement[] findStatementsInRange(PsiFile file, int startOffset, int endOffset)
{
PsiElement element1 = file.findElementAt(startOffset);
PsiElement element2 = file.findElementAt(endOffset - 1);
if(element1 instanceof PsiWhiteSpace)
{
startOffset = element1.getTextRange().getEndOffset();
element1 = file.findElementAt(startOffset);
}
if(element2 instanceof PsiWhiteSpace)
{
endOffset = element2.getTextRange().getStartOffset();
element2 = file.findElementAt(endOffset - 1);
}
if(element1 != null && element2 != null)
{
PsiElement commonParent = PsiTreeUtil.findCommonParent(element1, element2);
if(commonParent instanceof DotNetExpression)
{
return new PsiElement[]{commonParent};
}
}
final DotNetStatement statements = PsiTreeUtil.getParentOfType(element1, DotNetStatement.class);
if(statements == null || element1 == null || element2 == null || !PsiTreeUtil.isAncestor(statements, element2, true))
{
return PsiElement.EMPTY_ARRAY;
}
// don't forget about leafs (ex. ';')
final ASTNode[] astResult = UsefulPsiTreeUtil.findChildrenRange(statements.getNode().getChildren(null), startOffset, endOffset);
return ContainerUtil.map2Array(astResult, PsiElement.class, new Function<ASTNode, PsiElement>()
{
@Override
public PsiElement fun(ASTNode node)
{
return node.getPsi();
}
});
}
@Nullable
public static DotNetExpression findExpressionInRange(PsiFile file, int startOffset, int endOffset)
{
PsiElement element1 = file.findElementAt(startOffset);
PsiElement element2 = file.findElementAt(endOffset - 1);
if(element1 instanceof PsiWhiteSpace)
{
startOffset = element1.getTextRange().getEndOffset();
}
if(element2 instanceof PsiWhiteSpace)
{
endOffset = element2.getTextRange().getStartOffset();
}
DotNetExpression expression = PsiTreeUtil.findElementOfClassAtRange(file, startOffset, endOffset, DotNetExpression.class);
if(expression == null || expression.getTextRange().getEndOffset() != endOffset)
{
return null;
}
if(expression instanceof CSharpReferenceExpression && expression.getParent() instanceof CSharpMethodCallExpressionImpl)
{
return null;
}
return expression;
}
}