| /* |
| * 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.lexer; |
| |
| import com.intellij.psi.tree.IElementType; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.io.IOException; |
| |
| /** |
| * @author max |
| */ |
| public class FlexAdapter extends LexerBase { |
| private FlexLexer myFlex = null; |
| private IElementType myTokenType = null; |
| private CharSequence myText; |
| |
| private int myEnd; |
| private int myState; |
| |
| public FlexAdapter(final FlexLexer flex) { |
| myFlex = flex; |
| } |
| |
| public FlexLexer getFlex() { |
| return myFlex; |
| } |
| |
| @Override |
| public void start(@NotNull final CharSequence buffer, int startOffset, int endOffset, final int initialState) { |
| myText = buffer; |
| myEnd = endOffset; |
| myFlex.reset(myText, startOffset, endOffset, initialState); |
| myTokenType = null; |
| } |
| |
| @Override |
| public int getState() { |
| if (myTokenType == null) locateToken(); |
| return myState; |
| } |
| |
| @Override |
| public IElementType getTokenType() { |
| if (myTokenType == null) locateToken(); |
| return myTokenType; |
| } |
| |
| @Override |
| public int getTokenStart() { |
| if (myTokenType == null) locateToken(); |
| return myFlex.getTokenStart(); |
| } |
| |
| @Override |
| public int getTokenEnd() { |
| if (myTokenType == null) locateToken(); |
| return myFlex.getTokenEnd(); |
| } |
| |
| @Override |
| public void advance() { |
| if (myTokenType == null) locateToken(); |
| myTokenType = null; |
| } |
| |
| @NotNull |
| @Override |
| public CharSequence getBufferSequence() { |
| return myText; |
| } |
| |
| @Override |
| public int getBufferEnd() { |
| return myEnd; |
| } |
| |
| protected void locateToken() { |
| if (myTokenType != null) return; |
| try { |
| myState = myFlex.yystate(); |
| myTokenType = myFlex.advance(); |
| } |
| catch (IOException e) { /*Can't happen*/ } |
| catch (Error e) { |
| // add lexer class name to the error |
| final Error error = new Error(myFlex.getClass().getName() + ": " + e.getMessage()); |
| error.setStackTrace(e.getStackTrace()); |
| throw error; |
| } |
| } |
| } |