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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.CodeInsightUtilBase;
import com.intellij.codeInsight.daemon.QuickFixBundle;
import com.intellij.codeInsight.intention.impl.TypeExpression;
import com.intellij.codeInsight.template.Template;
import com.intellij.codeInsight.template.TemplateBuilderImpl;
import com.intellij.codeInsight.template.TemplateEditingAdapter;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.*;
import com.intellij.psi.codeStyle.CodeStyleManager;
import com.intellij.psi.codeStyle.CodeStyleSettingsManager;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.util.PsiUtil;
import org.jetbrains.annotations.NotNull;
/**
* @author Mike
*/
public class CreateLocalFromUsageFix extends CreateVarFromUsageFix {
public CreateLocalFromUsageFix(PsiReferenceExpression referenceExpression) {
super(referenceExpression);
}
private static final Logger LOG = Logger.getInstance("#com.intellij.codeInsight.daemon.impl.quickfix.CreateLocalFromUsageFix");
@Override
public String getText(String varName) {
return QuickFixBundle.message("create.local.from.usage.text", varName);
}
@Override
protected boolean isAvailableImpl(int offset) {
if (!super.isAvailableImpl(offset)) return false;
if(myReferenceExpression.isQualified()) return false;
PsiElement scope = PsiTreeUtil.getParentOfType(myReferenceExpression, PsiModifierListOwner.class);
return scope instanceof PsiMethod || scope instanceof PsiClassInitializer ||
scope instanceof PsiLocalVariable || scope instanceof PsiAnonymousClass;
}
@Override
protected void invokeImpl(final PsiClass targetClass) {
if (CreateFromUsageUtils.isValidReference(myReferenceExpression, false)) {
return;
}
final Project project = myReferenceExpression.getProject();
PsiElementFactory factory = JavaPsiFacade.getInstance(project).getElementFactory();
final PsiFile targetFile = targetClass.getContainingFile();
PsiType[] expectedTypes = CreateFromUsageUtils.guessType(myReferenceExpression, false);
PsiType type = expectedTypes[0];
String varName = myReferenceExpression.getReferenceName();
PsiExpression initializer = null;
boolean isInline = false;
PsiExpression[] expressions = CreateFromUsageUtils.collectExpressions(myReferenceExpression, PsiMember.class, PsiFile.class);
PsiStatement anchor = getAnchor(expressions);
if (anchor instanceof PsiExpressionStatement &&
((PsiExpressionStatement)anchor).getExpression() instanceof PsiAssignmentExpression) {
PsiAssignmentExpression assignment = (PsiAssignmentExpression)((PsiExpressionStatement)anchor).getExpression();
if (assignment.getLExpression().textMatches(myReferenceExpression)) {
initializer = assignment.getRExpression();
isInline = true;
}
}
PsiDeclarationStatement decl = factory.createVariableDeclarationStatement(varName, type, initializer);
TypeExpression expression = new TypeExpression(project, expectedTypes);
if (isInline) {
final PsiExpression expr = ((PsiExpressionStatement)anchor).getExpression();
final PsiElement semicolon = expr.getNextSibling();
if (semicolon != null) {
final PsiElement nextSibling = semicolon.getNextSibling();
if (nextSibling != null) {
decl.addRange(nextSibling, anchor.getLastChild());
}
}
decl = (PsiDeclarationStatement)anchor.replace(decl);
}
else {
decl = (PsiDeclarationStatement)anchor.getParent().addBefore(decl, anchor);
}
PsiVariable var = (PsiVariable)decl.getDeclaredElements()[0];
boolean isFinal =
CodeStyleSettingsManager.getSettings(project).GENERATE_FINAL_LOCALS && !CreateFromUsageUtils.isAccessedForWriting(expressions);
PsiUtil.setModifierProperty(var, PsiModifier.FINAL, isFinal);
var = CodeInsightUtilBase.forcePsiPostprocessAndRestoreElement(var);
if (var == null) return;
TemplateBuilderImpl builder = new TemplateBuilderImpl(var);
builder.replaceElement(var.getTypeElement(), expression);
builder.setEndVariableAfter(var.getNameIdentifier());
Template template = builder.buildTemplate();
final Editor newEditor = positionCursor(project, targetFile, var);
if (newEditor == null) return;
TextRange range = var.getTextRange();
newEditor.getDocument().deleteString(range.getStartOffset(), range.getEndOffset());
startTemplate(newEditor, template, project, new TemplateEditingAdapter() {
@Override
public void templateFinished(Template template, boolean brokenOff) {
PsiDocumentManager.getInstance(project).commitDocument(newEditor.getDocument());
final int offset = newEditor.getCaretModel().getOffset();
final PsiLocalVariable localVariable = PsiTreeUtil.findElementOfClassAtOffset(targetFile, offset, PsiLocalVariable.class, false);
if (localVariable != null) {
ApplicationManager.getApplication().runWriteAction(new Runnable() {
@Override
public void run() {
CodeStyleManager.getInstance(project).reformat(localVariable);
}
});
}
}
});
}
@Override
protected boolean isAllowOuterTargetClass() {
return false;
}
private static PsiStatement getAnchor(PsiExpression[] expressionOccurences) {
PsiElement parent = expressionOccurences[0];
int minOffset = expressionOccurences[0].getTextRange().getStartOffset();
for (int i = 1; i < expressionOccurences.length; i++) {
parent = PsiTreeUtil.findCommonParent(parent, expressionOccurences[i]);
LOG.assertTrue(parent != null);
minOffset = Math.min(minOffset, expressionOccurences[i].getTextRange().getStartOffset());
}
final PsiCodeBlock block = PsiTreeUtil.getParentOfType(parent, PsiCodeBlock.class, false);
LOG.assertTrue(block != null && block.getStatements().length > 0, block);
PsiStatement[] statements = block.getStatements();
for (int i = 1; i < statements.length; i++) {
if (statements[i].getTextRange().getStartOffset() > minOffset) return statements[i-1];
}
return statements[statements.length - 1];
}
@Override
@NotNull
public String getFamilyName() {
return QuickFixBundle.message("create.local.from.usage.family");
}
}
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