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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.stubs;
import com.intellij.lang.ASTNode;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.StubBasedPsiElement;
import com.intellij.psi.StubBuilder;
import com.intellij.psi.tree.IElementType;
import com.intellij.util.containers.Stack;
import org.jetbrains.annotations.NotNull;
/**
* @author max
*/
public class DefaultStubBuilder implements StubBuilder {
private static final Logger LOG = Logger.getInstance("#com.intellij.psi.stubs.DefaultStubBuilder");
@Override
public StubElement buildStubTree(@NotNull PsiFile file) {
return buildStubTreeFor(file, createStubForFile(file));
}
@NotNull
protected StubElement createStubForFile(@NotNull PsiFile file) {
@SuppressWarnings("unchecked") PsiFileStubImpl stub = new PsiFileStubImpl(file);
return stub;
}
@NotNull
private StubElement buildStubTreeFor(@NotNull PsiElement root, @NotNull StubElement parentStub) {
Stack<StubElement> parentStubs = new Stack<StubElement>();
Stack<PsiElement> parentElements = new Stack<PsiElement>();
parentElements.push(root);
parentStubs.push(parentStub);
while (!parentElements.isEmpty()) {
StubElement stub = parentStubs.pop();
PsiElement elt = parentElements.pop();
if (elt instanceof StubBasedPsiElement) {
final IStubElementType type = ((StubBasedPsiElement)elt).getElementType();
if (type.shouldCreateStub(elt.getNode())) {
@SuppressWarnings("unchecked") StubElement s = type.createStub(elt, stub);
stub = s;
}
}
else {
final ASTNode node = elt.getNode();
final IElementType type = node == null? null : node.getElementType();
if (type instanceof IStubElementType && ((IStubElementType)type).shouldCreateStub(node)) {
LOG.error("Non-StubBasedPsiElement requests stub creation. Stub type: " + type + ", PSI: " + elt);
}
}
for (PsiElement child = elt.getLastChild(); child != null; child = child.getPrevSibling()) {
if (!skipChildProcessingWhenBuildingStubs(elt, child)) {
parentStubs.push(stub);
parentElements.push(child);
}
}
}
return parentStub;
}
/**
* Note to implementers: always keep in sync with {@linkplain #skipChildProcessingWhenBuildingStubs(ASTNode, ASTNode)}.
*/
protected boolean skipChildProcessingWhenBuildingStubs(@NotNull PsiElement parent, @NotNull PsiElement element) {
return false;
}
@NotNull
protected StubElement buildStubTreeFor(@NotNull ASTNode root, @NotNull StubElement parentStub) {
Stack<StubElement> parentStubs = new Stack<StubElement>();
Stack<ASTNode> parentNodes = new Stack<ASTNode>();
parentNodes.push(root);
parentStubs.push(parentStub);
while (!parentStubs.isEmpty()) {
StubElement stub = parentStubs.pop();
ASTNode node = parentNodes.pop();
IElementType nodeType = node.getElementType();
if (nodeType instanceof IStubElementType) {
final IStubElementType type = (IStubElementType)nodeType;
if (type.shouldCreateStub(node)) {
PsiElement element = node.getPsi();
if (!(element instanceof StubBasedPsiElement)) {
LOG.error("Non-StubBasedPsiElement requests stub creation. Stub type: " + type + ", PSI: " + element);
}
@SuppressWarnings("unchecked") StubElement s = type.createStub(element, stub);
stub = s;
LOG.assertTrue(stub != null, element);
}
}
for (ASTNode childNode = node.getLastChildNode(); childNode != null; childNode = childNode.getTreePrev()) {
if (!skipChildProcessingWhenBuildingStubs(node, childNode)) {
parentNodes.push(childNode);
parentStubs.push(stub);
}
}
}
return parentStub;
}
/**
* Note to implementers: always keep in sync with {@linkplain #skipChildProcessingWhenBuildingStubs(PsiElement, PsiElement)}.
*/
@Override
public boolean skipChildProcessingWhenBuildingStubs(@NotNull ASTNode parent, @NotNull ASTNode node) {
return false;
}
}
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