| /* |
| * 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 org.jetbrains.plugins.groovy.highlighter; |
| |
| import com.intellij.lexer.LexerBase; |
| import com.intellij.openapi.diagnostic.Attachment; |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.util.text.StringUtil; |
| import com.intellij.psi.StringEscapesTokenTypes; |
| import com.intellij.psi.tree.IElementType; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Created by Max Medvedev on 10/22/13 |
| */ |
| public abstract class GroovyStringLexerBase extends LexerBase { |
| private static final Logger LOG = Logger.getInstance(GroovyStringLexerBase.class); |
| private final IElementType myContentElementType; |
| |
| private CharSequence myBuffer; |
| private int myBufferEnd; |
| |
| private int myStart; |
| private int myEnd; |
| private IElementType myTokenType; |
| |
| public GroovyStringLexerBase(IElementType contentElementType) { |
| myContentElementType = contentElementType; |
| } |
| |
| @Override |
| public void start(@NotNull CharSequence buffer, int startOffset, int endOffset, int initialState) { |
| if (buffer.length() < endOffset) { |
| LOG.error("buffer Length: " + buffer.length() + ", endOffset: " + endOffset, new Attachment("",buffer.toString())); |
| } |
| |
| myBuffer = buffer; |
| myEnd = startOffset; |
| myBufferEnd = endOffset; |
| myTokenType = locateToken(); |
| } |
| |
| @Nullable |
| private IElementType locateToken() { |
| if (myEnd >= myBufferEnd) return null; |
| |
| myStart = myEnd; |
| if (checkForSimpleValidEscape(myStart)) { |
| myEnd = myStart + 2; |
| return StringEscapesTokenTypes.VALID_STRING_ESCAPE_TOKEN; |
| } |
| else if (checkForHexCodeStart(myStart)) { |
| for (myEnd = myStart + 2; myEnd < myStart + 6; myEnd++) { |
| if (myEnd >= myBufferEnd || !StringUtil.isHexDigit(myBuffer.charAt(myEnd))) { |
| return StringEscapesTokenTypes.INVALID_UNICODE_ESCAPE_TOKEN; |
| } |
| } |
| return StringEscapesTokenTypes.VALID_STRING_ESCAPE_TOKEN; |
| } |
| else if (checkForInvalidSimpleEscape(myStart)) { |
| myEnd = myStart + 2; |
| return StringEscapesTokenTypes.INVALID_CHARACTER_ESCAPE_TOKEN; |
| } |
| |
| while (myEnd < myBufferEnd && !checkForSimpleValidEscape(myEnd) && !checkForHexCodeStart(myEnd)) myEnd++; |
| |
| return myContentElementType; |
| } |
| |
| protected abstract boolean checkForSimpleValidEscape(int start); |
| |
| protected abstract boolean checkForInvalidSimpleEscape(int start); |
| |
| protected abstract boolean checkForHexCodeStart(int start); |
| |
| @Override |
| public int getState() { |
| return 0; |
| } |
| |
| @Override |
| public IElementType getTokenType() { |
| return myTokenType; |
| } |
| |
| @Override |
| public int getTokenStart() { |
| return myStart; |
| } |
| |
| @Override |
| public int getTokenEnd() { |
| return myEnd; |
| } |
| |
| @Override |
| public void advance() { |
| myTokenType = locateToken(); |
| } |
| |
| @NotNull |
| @Override |
| public CharSequence getBufferSequence() { |
| return myBuffer; |
| } |
| |
| @Override |
| public int getBufferEnd() { |
| return myBufferEnd; |
| } |
| |
| protected char charAt(int i) { |
| return myBuffer.charAt(i); |
| } |
| } |