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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.codeInsight.daemon.impl.quickfix;
import com.intellij.codeInsight.ExceptionUtil;
import com.intellij.codeInsight.FileModificationService;
import com.intellij.codeInsight.daemon.QuickFixBundle;
import com.intellij.codeInsight.generation.surroundWith.SurroundWithUtil;
import com.intellij.codeInsight.intention.impl.BaseIntentionAction;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.ScrollType;
import com.intellij.openapi.fileEditor.ex.IdeDocumentHistory;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.*;
import com.intellij.psi.codeStyle.JavaCodeStyleManager;
import com.intellij.psi.codeStyle.VariableKind;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.util.PsiUtil;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.ArrayList;
import java.util.List;
/**
* @author mike
*/
public class AddExceptionToCatchFix extends BaseIntentionAction {
private static final Logger LOG = Logger.getInstance("#com.intellij.codeInsight.daemon.impl.quickfix.AddExceptionToCatchFix");
@Override
public void invoke(@NotNull Project project, Editor editor, PsiFile file) {
if (!FileModificationService.getInstance().prepareFileForWrite(file)) return;
int offset = editor.getCaretModel().getOffset();
PsiDocumentManager.getInstance(project).commitAllDocuments();
PsiElement element = findElement(file, offset);
PsiTryStatement tryStatement = (PsiTryStatement) element.getParent();
List<PsiClassType> unhandledExceptions = new ArrayList<PsiClassType>(ExceptionUtil.collectUnhandledExceptions(element, null));
ExceptionUtil.sortExceptionsByHierarchy(unhandledExceptions);
IdeDocumentHistory.getInstance(project).includeCurrentPlaceAsChangePlace();
PsiCodeBlock catchBlockToSelect = null;
try {
if (tryStatement.getFinallyBlock() == null && tryStatement.getCatchBlocks().length == 0) {
for (PsiClassType unhandledException : unhandledExceptions) {
addCatchStatement(tryStatement, unhandledException, file);
}
catchBlockToSelect = tryStatement.getCatchBlocks()[0];
}
else {
for (PsiClassType unhandledException : unhandledExceptions) {
PsiCodeBlock codeBlock = addCatchStatement(tryStatement, unhandledException, file);
if (catchBlockToSelect == null) catchBlockToSelect = codeBlock;
}
}
}
catch (IncorrectOperationException e) {
LOG.error(e);
}
if (catchBlockToSelect != null) {
TextRange range = SurroundWithUtil.getRangeToSelect(catchBlockToSelect);
editor.getCaretModel().moveToOffset(range.getStartOffset());
editor.getScrollingModel().scrollToCaret(ScrollType.RELATIVE);
editor.getSelectionModel().setSelection(range.getStartOffset(), range.getEndOffset());
}
}
private static PsiCodeBlock addCatchStatement(PsiTryStatement tryStatement, PsiClassType exceptionType, PsiFile file) throws IncorrectOperationException {
PsiElementFactory factory = JavaPsiFacade.getInstance(tryStatement.getProject()).getElementFactory();
if (tryStatement.getTryBlock() == null) {
addTryBlock(tryStatement, factory);
}
JavaCodeStyleManager styleManager = JavaCodeStyleManager.getInstance(tryStatement.getProject());
String name = styleManager.suggestVariableName(VariableKind.PARAMETER, null, null, exceptionType).names[0];
name = styleManager.suggestUniqueVariableName(name, tryStatement, false);
PsiCatchSection catchSection = factory.createCatchSection(exceptionType, name, file);
PsiCodeBlock finallyBlock = tryStatement.getFinallyBlock();
if (finallyBlock == null) {
tryStatement.add(catchSection);
}
else {
tryStatement.addBefore(catchSection, getFinallySectionStart(finallyBlock));
}
PsiParameter[] parameters = tryStatement.getCatchBlockParameters();
parameters[parameters.length - 1].getTypeElement().replace(factory.createTypeElement(exceptionType));
PsiCodeBlock[] catchBlocks = tryStatement.getCatchBlocks();
return catchBlocks[catchBlocks.length - 1];
}
private static void addTryBlock(PsiTryStatement tryStatement, PsiElementFactory factory) {
PsiCodeBlock tryBlock = factory.createCodeBlock();
PsiElement anchor;
PsiCatchSection[] catchSections = tryStatement.getCatchSections();
if (catchSections.length > 0) {
anchor = catchSections[0];
}
else {
PsiCodeBlock finallyBlock = tryStatement.getFinallyBlock();
anchor = finallyBlock != null ? getFinallySectionStart(finallyBlock) : null;
}
if (anchor != null) {
tryStatement.addBefore(tryBlock, anchor);
}
else {
tryStatement.add(tryBlock);
}
}
private static PsiElement getFinallySectionStart(@NotNull PsiCodeBlock finallyBlock) {
PsiElement finallyElement = finallyBlock;
while (!PsiUtil.isJavaToken(finallyElement, JavaTokenType.FINALLY_KEYWORD) && finallyElement != null) {
finallyElement = finallyElement.getPrevSibling();
}
assert finallyElement != null : finallyBlock.getParent().getText();
return finallyElement;
}
@Override
public boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) {
if (!(file instanceof PsiJavaFile)) return false;
int offset = editor.getCaretModel().getOffset();
PsiElement element = findElement(file, offset);
if (element == null) return false;
setText(QuickFixBundle.message("add.catch.clause.text"));
return true;
}
@Nullable
private static PsiElement findElement(final PsiFile file, final int offset) {
PsiElement element = file.findElementAt(offset);
if (element instanceof PsiWhiteSpace) element = file.findElementAt(offset - 1);
if (element == null) return null;
@SuppressWarnings({"unchecked"})
final PsiElement parent = PsiTreeUtil.getParentOfType(element, PsiTryStatement.class, PsiMethod.class);
if (parent == null || parent instanceof PsiMethod) return null;
final PsiTryStatement statement = (PsiTryStatement) parent;
final PsiCodeBlock tryBlock = statement.getTryBlock();
if (tryBlock != null && tryBlock.getTextRange().contains(offset)) {
if (!ExceptionUtil.collectUnhandledExceptions(tryBlock, statement.getParent()).isEmpty()) {
return tryBlock;
}
}
final PsiResourceList resourceList = statement.getResourceList();
if (resourceList != null && resourceList.getTextRange().contains(offset)) {
if (!ExceptionUtil.collectUnhandledExceptions(resourceList, statement.getParent()).isEmpty()) {
return resourceList;
}
}
return null;
}
@Override
@NotNull
public String getFamilyName() {
return QuickFixBundle.message("add.catch.clause.family");
}
}
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