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/*
* Copyright 2000-2014 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.psi.impl.source;
import com.intellij.lang.ASTNode;
import com.intellij.lang.LighterAST;
import com.intellij.lang.LighterASTNode;
import com.intellij.lang.LighterLazyParseableNode;
import com.intellij.psi.JavaTokenType;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiJavaFile;
import com.intellij.psi.impl.java.stubs.impl.PsiJavaFileStubImpl;
import com.intellij.psi.impl.source.tree.*;
import com.intellij.psi.stubs.LightStubBuilder;
import com.intellij.psi.stubs.StubElement;
import com.intellij.psi.tree.IElementType;
import com.intellij.psi.tree.TokenSet;
import com.intellij.util.io.StringRef;
import org.jetbrains.annotations.NotNull;
public class JavaLightStubBuilder extends LightStubBuilder {
@NotNull
@Override
protected StubElement createStubForFile(@NotNull PsiFile file, @NotNull LighterAST tree) {
if (!(file instanceof PsiJavaFile)) {
return super.createStubForFile(file, tree);
}
String refText = "";
LighterASTNode pkg = LightTreeUtil.firstChildOfType(tree, tree.getRoot(), JavaElementType.PACKAGE_STATEMENT);
if (pkg != null) {
LighterASTNode ref = LightTreeUtil.firstChildOfType(tree, pkg, JavaElementType.JAVA_CODE_REFERENCE);
if (ref != null) {
refText = JavaSourceUtil.getReferenceText(tree, ref);
}
}
return new PsiJavaFileStubImpl((PsiJavaFile)file, StringRef.fromString(refText), false);
}
@Override
public boolean skipChildProcessingWhenBuildingStubs(@NotNull ASTNode parent, @NotNull ASTNode node) {
IElementType parentType = parent.getElementType();
IElementType nodeType = node.getElementType();
if (checkByTypes(parentType, nodeType)) return true;
if (nodeType == JavaElementType.CODE_BLOCK && node instanceof TreeElement) {
CodeBlockVisitor visitor = new CodeBlockVisitor();
((TreeElement)node).acceptTree(visitor);
return visitor.result;
}
return false;
}
@Override
protected boolean skipChildProcessingWhenBuildingStubs(@NotNull LighterAST tree, @NotNull LighterASTNode parent, @NotNull LighterASTNode node) {
IElementType parentType = parent.getTokenType();
IElementType nodeType = node.getTokenType();
if (checkByTypes(parentType, nodeType)) return true;
if (nodeType == JavaElementType.CODE_BLOCK && node instanceof LighterLazyParseableNode) {
CodeBlockVisitor visitor = new CodeBlockVisitor();
((LighterLazyParseableNode)node).accept(visitor);
return visitor.result;
}
return false;
}
private static boolean checkByTypes(IElementType parentType, IElementType nodeType) {
if (ElementType.IMPORT_STATEMENT_BASE_BIT_SET.contains(parentType)) {
return true;
}
if (nodeType == JavaElementType.PARAMETER && parentType != JavaElementType.PARAMETER_LIST) {
return true;
}
if (nodeType == JavaElementType.PARAMETER_LIST && parentType == JavaElementType.LAMBDA_EXPRESSION) {
return true;
}
return false;
}
private static class CodeBlockVisitor extends RecursiveTreeElementWalkingVisitor implements LighterLazyParseableNode.Visitor {
private static final TokenSet BLOCK_ELEMENTS = TokenSet.create(
JavaElementType.ANNOTATION, JavaElementType.CLASS, JavaElementType.ANONYMOUS_CLASS);
private boolean result = true;
@Override
protected void visitNode(TreeElement element) {
if (BLOCK_ELEMENTS.contains(element.getElementType())) {
result = false;
stopWalking();
return;
}
super.visitNode(element);
}
private IElementType last = null;
private boolean seenNew = false;
@Override
public boolean visit(IElementType type) {
if (ElementType.JAVA_COMMENT_OR_WHITESPACE_BIT_SET.contains(type)) {
return true;
}
// annotations
if (type == JavaTokenType.AT) {
return (result = false);
}
// anonymous classes
else if (type == JavaTokenType.NEW_KEYWORD) {
seenNew = true;
}
else if (seenNew && type == JavaTokenType.SEMICOLON) {
seenNew = false;
}
else if (seenNew && type == JavaTokenType.LBRACE && last != JavaTokenType.RBRACKET) {
return (result = false);
}
// local classes
else if (type == JavaTokenType.CLASS_KEYWORD && last != JavaTokenType.DOT) {
return (result = false);
}
last = type;
return true;
}
}
}
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