| /* |
| * 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.ide.highlighter.custom; |
| |
| import com.intellij.ide.highlighter.custom.tokens.TokenInfo; |
| import com.intellij.ide.highlighter.custom.tokens.TokenParser; |
| import com.intellij.lexer.LexerBase; |
| import com.intellij.psi.CustomHighlighterTokenType; |
| import com.intellij.psi.tree.IElementType; |
| import com.intellij.util.ArrayUtil; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.List; |
| |
| /** |
| * @author dsl |
| */ |
| public class AbstractCustomLexer extends LexerBase { |
| protected CharSequence myBuffer = ArrayUtil.EMPTY_CHAR_SEQUENCE; |
| protected int myStartOffset = 0; |
| protected int myEndOffset = 0; |
| private final TokenParser[] myTokenParsers; |
| protected TokenInfo myCurrentToken; |
| protected int myPosition; |
| |
| public AbstractCustomLexer(List<TokenParser> tokenParsers) { |
| myTokenParsers = tokenParsers.toArray(new TokenParser[tokenParsers.size()]); |
| } |
| |
| @Override |
| public void start(@NotNull CharSequence buffer, int startOffset, int endOffset, int initialState) { |
| myBuffer = buffer; |
| myStartOffset = startOffset; |
| myEndOffset = endOffset; |
| myPosition = myStartOffset; |
| myCurrentToken = new TokenInfo(); |
| for (TokenParser tokenParser : myTokenParsers) { |
| tokenParser.setBuffer(myBuffer, myStartOffset, myEndOffset); |
| } |
| advance(); |
| } |
| |
| @Override |
| public int getState() { |
| return 0; |
| } |
| |
| @Override |
| public IElementType getTokenType() { |
| return myCurrentToken.getType(); |
| } |
| |
| @Override |
| public int getTokenStart() { |
| return myCurrentToken.getStart(); |
| } |
| |
| @Override |
| public int getTokenEnd() { |
| return myCurrentToken.getEnd(); |
| } |
| |
| @Override |
| public void advance() { |
| if (myPosition >= myEndOffset) { |
| myCurrentToken.updateData(myPosition, myPosition, null); |
| return; |
| } |
| boolean tokenFound = false; |
| for (TokenParser tokenParser : myTokenParsers) { |
| if (tokenParser.hasToken(myPosition)) { |
| tokenParser.getTokenInfo(myCurrentToken); |
| if (myCurrentToken.getEnd() <= myCurrentToken.getStart()) { |
| throw new AssertionError(tokenParser); |
| } |
| tokenFound = true; |
| break; |
| } |
| } |
| |
| if (!tokenFound) { |
| handleTokenNotFound(); |
| } |
| myPosition = myCurrentToken.getEnd(); |
| } |
| |
| protected void handleTokenNotFound() { |
| myCurrentToken.updateData(myPosition, myPosition + 1, CustomHighlighterTokenType.CHARACTER); |
| } |
| |
| @Override |
| @NotNull |
| public CharSequence getBufferSequence() { |
| return myBuffer; |
| } |
| |
| @Override |
| public int getBufferEnd() { |
| return myEndOffset; |
| } |
| |
| } |