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/*
* Copyright 2000-2013 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.spi.parsing;
import com.intellij.lang.ASTNode;
import com.intellij.lang.ParserDefinition;
import com.intellij.lang.PsiBuilder;
import com.intellij.lang.PsiParser;
import com.intellij.lexer.Lexer;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.project.Project;
import com.intellij.psi.*;
import com.intellij.psi.tree.IElementType;
import com.intellij.psi.tree.IFileElementType;
import com.intellij.psi.tree.TokenSet;
import com.intellij.psi.util.PsiUtilCore;
import com.intellij.spi.psi.SPIClassProviderReferenceElement;
import com.intellij.spi.psi.SPIClassProvidersElementList;
import com.intellij.spi.psi.SPIPackageOrClassReferenceElement;
import com.intellij.spi.psi.SPIFile;
import com.intellij.lang.spi.SPILanguage;
import org.jetbrains.annotations.NotNull;
/**
* User: anna
*/
public class SPIParserDefinition implements ParserDefinition {
public static final IFileElementType SPI_FILE_ELEMENT_TYPE = new IFileElementType(SPILanguage.INSTANCE);
private static final TokenSet WHITE_SPACES = TokenSet.create(TokenType.WHITE_SPACE);
private static final Logger LOG = Logger.getInstance("#" + SPIParserDefinition.class.getName());
@NotNull
@Override
public Lexer createLexer(Project project) {
return new SPILexer();
}
@Override
public PsiParser createParser(Project project) {
return new PsiParser() {
@NotNull
@Override
public ASTNode parse(IElementType root, PsiBuilder builder) {
final PsiBuilder.Marker rootMarker = builder.mark();
final PsiBuilder.Marker propertiesList = builder.mark();
while (!builder.eof()) {
parseProvider(builder);
}
propertiesList.done(SPIElementTypes.PROVIDERS_LIST);
rootMarker.done(root);
return builder.getTreeBuilt();
}
};
}
@Override
public IFileElementType getFileNodeType() {
return SPI_FILE_ELEMENT_TYPE;
}
@NotNull
@Override
public TokenSet getWhitespaceTokens() {
return WHITE_SPACES;
}
@NotNull
@Override
public TokenSet getCommentTokens() {
return TokenSet.create(JavaTokenType.END_OF_LINE_COMMENT);
}
@NotNull
@Override
public TokenSet getStringLiteralElements() {
return TokenSet.EMPTY;
}
@NotNull
@Override
public PsiElement createElement(ASTNode node) {
final IElementType elementType = node.getElementType();
if (elementType == SPIElementTypes.PROVIDERS_LIST) {
return new SPIClassProvidersElementList(node);
}
if (elementType == SPIElementTypes.PROVIDER) {
return new SPIClassProviderReferenceElement(node);
}
if (elementType == SPIElementTypes.PACK) {
return new SPIPackageOrClassReferenceElement(node);
}
return PsiUtilCore.NULL_PSI_ELEMENT;
}
@Override
public PsiFile createFile(FileViewProvider viewProvider) {
return new SPIFile(viewProvider);
}
@Override
public SpaceRequirements spaceExistanceTypeBetweenTokens(ASTNode left, ASTNode right) {
return SpaceRequirements.MAY;
}
public static void parseProvider(PsiBuilder builder) {
if (builder.getTokenType() == SPITokenType.IDENTIFIER) {
final PsiBuilder.Marker prop = builder.mark();
parseProviderChar(builder, builder.mark());
prop.done(SPIElementTypes.PROVIDER);
}
else {
builder.advanceLexer();
builder.error("Unexpected token");
}
}
private static void parseProviderChar(final PsiBuilder builder, PsiBuilder.Marker pack) {
builder.advanceLexer();
final IElementType tokenType = builder.getTokenType();
if (tokenType == JavaTokenType.DOT || tokenType == SPITokenType.DOLLAR) {
pack.done(SPIElementTypes.PACK);
builder.advanceLexer();
final IElementType initialTokenType = builder.getTokenType();
if (initialTokenType == null) return;
parseProviderChar(builder, pack.precede());
} else {
pack.drop();
}
}
}
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