| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.royale.compiler.internal.parsing.as; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| |
| import org.apache.royale.compiler.parsing.IASToken; |
| |
| /** |
| * The token buffer used by IDE features such as code hinting and syntax |
| * highlighting. |
| */ |
| public class RepairingTokenBuffer extends BaseRepairingTokenBuffer implements IRepairingTokenBuffer |
| { |
| private final ASToken[] tokens; |
| private final int size; |
| |
| /** |
| * A sorted set of offsets where optional semicolon tokens are inserted. |
| */ |
| private final LinkedHashSet<Integer> semicolonInsertions; |
| |
| /** |
| * Constructor |
| * |
| * @param tokens list of ASTokens (or any subclass of antlr.Token) |
| */ |
| public RepairingTokenBuffer(ASToken[] tokens) |
| { |
| super(null); |
| this.tokens = tokens; |
| size = tokens.length; |
| semicolonInsertions = new LinkedHashSet<Integer>(); |
| } |
| |
| @Override |
| public final boolean insertSemicolon(final boolean isNextToken) |
| { |
| if (!insertSemis) |
| return false; |
| final boolean isAdded = semicolonInsertions.add(position - 1); |
| if (isAdded && isNextToken) |
| onSemicolonInserted(); |
| return isAdded; |
| } |
| |
| @Override |
| public final void rewind(int position) |
| { |
| this.position = position; |
| } |
| |
| @Override |
| public final void consume() |
| { |
| if (nextIsSemicolon) |
| nextIsSemicolon = false; |
| else |
| position++; |
| } |
| |
| @Override |
| protected final ASToken lookAheadSkipInsertedSemicolon(int i) |
| { |
| // Position of the look-ahead token in the token buffer. |
| final int lookAheadPos = position + i - 1; |
| if (lookAheadPos < size) |
| return tokens[lookAheadPos]; |
| else |
| return eofToken; |
| } |
| |
| /** |
| * Get all the tokens in this buffer. |
| * |
| * @param includeInserted True if automatically inserted semicolons are |
| * included in the result. |
| * @return All the tokens in the buffer. |
| */ |
| public IASToken[] getTokens(boolean includeInserted) |
| { |
| if (!includeInserted) |
| return tokens; |
| |
| final List<ASToken> tokens = new ArrayList<ASToken>(Arrays.asList(this.tokens)); |
| int adjust = 0; |
| |
| // "pos" is the index of the token after the to-be-inserted semicolon |
| for (final Integer pos : semicolonInsertions) |
| { |
| final ASToken tokenBeforeSemicolon = tokens.get(pos); |
| final ASToken semicolon = new ASToken( |
| ASTokenTypes.TOKEN_SEMICOLON, |
| tokenBeforeSemicolon.getEnd(), |
| tokenBeforeSemicolon.getEnd(), |
| tokenBeforeSemicolon.getLine(), |
| tokenBeforeSemicolon.getColumn() + 1, |
| ";"); |
| semicolon.setSourcePath(tokenBeforeSemicolon.getSourcePath()); |
| adjust++; |
| final int insertIndex = pos + adjust; |
| tokens.add(insertIndex, semicolon); |
| } |
| return tokens.toArray(new ASToken[0]); |
| } |
| |
| @Override |
| public ASToken previous() |
| { |
| final int prevPos = position - 1; |
| if (prevPos < size && prevPos >= 0) |
| return tokens[prevPos]; |
| else |
| return eofToken; |
| } |
| |
| /** |
| * If we don't have the optional semicolon, always insert it. This |
| * implementation is much looser than |
| * {@link StreamingTokenBuffer#matchOptionalSemicolon()} in order to appease |
| * code model. |
| * |
| * @return Always true. |
| */ |
| @Override |
| public boolean matchOptionalSemicolon() |
| { |
| if (LA(1) == ASTokenTypes.TOKEN_SEMICOLON) |
| consume(); |
| else |
| insertSemicolon(false); |
| return true; |
| } |
| } |