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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.
*/
/*
* Created by IntelliJ IDEA.
* User: mike
* Date: Jul 23, 2002
* Time: 3:01:22 PM
* To change template for new class use
* Code Style | Class Templates options (Tools | IDE Options).
*/
package com.intellij.codeInsight.completion;
import com.intellij.codeInsight.lookup.CharFilter;
import com.intellij.codeInsight.lookup.Lookup;
import com.intellij.codeInsight.lookup.LookupElement;
import com.intellij.codeInsight.lookup.impl.LookupImpl;
import com.intellij.lang.java.JavaLanguage;
import com.intellij.patterns.PsiJavaPatterns;
import com.intellij.psi.*;
import com.intellij.psi.javadoc.PsiDocComment;
import com.intellij.psi.util.PsiTreeUtil;
public class JavaCharFilter extends CharFilter {
private static boolean isWithinLiteral(final Lookup lookup) {
PsiElement psiElement = lookup.getPsiElement();
return psiElement != null && psiElement.getParent() instanceof PsiLiteralExpression;
}
@Override
public Result acceptChar(char c, final int prefixLength, final Lookup lookup) {
if (!lookup.getPsiFile().getLanguage().isKindOf(JavaLanguage.INSTANCE)) {
return null;
}
LookupElement item = lookup.getCurrentItem();
if (item == null) return null;
final Object o = item.getObject();
if (c == '!') {
if (o instanceof PsiVariable) {
if (PsiType.BOOLEAN.isAssignableFrom(((PsiVariable)o).getType())) return Result.SELECT_ITEM_AND_FINISH_LOOKUP;
}
if (o instanceof PsiMethod) {
final PsiType type = ((PsiMethod)o).getReturnType();
if (type != null && PsiType.BOOLEAN.isAssignableFrom(type)) return Result.SELECT_ITEM_AND_FINISH_LOOKUP;
}
return null;
}
if (c == '.' && isWithinLiteral(lookup)) return Result.ADD_TO_PREFIX;
if (c == ':') {
PsiFile file = lookup.getPsiFile();
PsiDocumentManager.getInstance(file.getProject()).commitDocument(lookup.getEditor().getDocument());
PsiElement element = lookup.getPsiElement();
if (PsiTreeUtil.getParentOfType(element, PsiSwitchLabelStatement.class) != null ||
PsiTreeUtil.getParentOfType(element, PsiConditionalExpression.class) != null) {
return Result.SELECT_ITEM_AND_FINISH_LOOKUP;
}
return Result.HIDE_LOOKUP;
}
if (c == '[' || c == ']' || c == ')' || c == '>') return CharFilter.Result.SELECT_ITEM_AND_FINISH_LOOKUP;
if (c == '<' && o instanceof PsiClass) return Result.SELECT_ITEM_AND_FINISH_LOOKUP;
if (c == '(') {
if (o instanceof PsiClass) {
if (PsiJavaPatterns.psiElement().afterLeaf(PsiKeyword.NEW).accepts(lookup.getPsiElement())) {
return Result.SELECT_ITEM_AND_FINISH_LOOKUP;
}
return Result.HIDE_LOOKUP;
}
if (o instanceof PsiType) {
return Result.HIDE_LOOKUP;
}
}
if ((c == ',' || c == '=') && o instanceof PsiVariable) {
int lookupStart = ((LookupImpl)lookup).getLookupStart();
String name = ((PsiVariable)o).getName();
if (lookupStart >= 0 && name != null && name.equals(lookup.itemPattern(item))) {
return Result.HIDE_LOOKUP;
}
}
if (c == '#' && PsiTreeUtil.getParentOfType(lookup.getPsiElement(), PsiDocComment.class) != null) {
if (o instanceof PsiClass) {
return Result.SELECT_ITEM_AND_FINISH_LOOKUP;
}
}
if (c == '(' && PsiKeyword.RETURN.equals(item.getLookupString())) {
return Result.HIDE_LOOKUP;
}
return null;
}
}
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