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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.lexer;
import com.intellij.util.CharTable;
import org.jetbrains.annotations.Contract;
import org.jetbrains.annotations.Nullable;
/**
* @author max
*/
public class LexerUtil {
private LexerUtil() {}
public static CharSequence getTokenText(Lexer lexer) {
return lexer.getBufferSequence().subSequence(lexer.getTokenStart(), lexer.getTokenEnd());
}
public static CharSequence internToken(Lexer lexer, CharTable table) {
return table.intern(getTokenText(lexer));
}
@Contract("!null->!null")
public static Lexer getRootLexer(@Nullable Lexer lexer) {
while (lexer instanceof DelegateLexer) {
lexer = ((DelegateLexer)lexer).getDelegate();
}
return lexer;
}
}
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