| /********************************************************************** |
| * Copyright (c) 2002,2003 Rational Software Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v0.5 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v05.html |
| * |
| * Contributors: |
| * IBM Rational Software - Initial API and implementation |
| ***********************************************************************/ |
| package org.eclipse.cdt.internal.core.parser; |
| |
| import java.util.Iterator; |
| import java.util.Set; |
| import java.util.TreeSet; |
| |
| import org.eclipse.cdt.core.parser.BacktrackException; |
| import org.eclipse.cdt.core.parser.EndOfFileException; |
| import org.eclipse.cdt.core.parser.IParser; |
| import org.eclipse.cdt.core.parser.IParserLogService; |
| import org.eclipse.cdt.core.parser.IScanner; |
| import org.eclipse.cdt.core.parser.ISourceElementRequestor; |
| import org.eclipse.cdt.core.parser.IToken; |
| import org.eclipse.cdt.core.parser.OffsetLimitReachedException; |
| import org.eclipse.cdt.core.parser.ParserFactory; |
| import org.eclipse.cdt.core.parser.ParserLanguage; |
| import org.eclipse.cdt.core.parser.ParserMode; |
| import org.eclipse.cdt.core.parser.ParserNotImplementedException; |
| import org.eclipse.cdt.core.parser.ast.IASTCompletionNode; |
| import org.eclipse.cdt.core.parser.ast.IASTNode; |
| import org.eclipse.cdt.core.parser.ast.IASTScope; |
| import org.eclipse.cdt.core.parser.ast.IASTCompletionNode.CompletionKind; |
| import org.eclipse.cdt.internal.core.parser.ast.ASTCompletionNode; |
| |
| /** |
| * @author jcamelon |
| */ |
| public class ContextualParser extends Parser implements IParser { |
| |
| protected CompletionKind kind; |
| protected IASTScope scope; |
| protected IASTNode context; |
| protected IToken finalToken; |
| private Set keywordSet; |
| private int boundaryOffset; |
| |
| /** |
| * @param scanner |
| * @param callback |
| * @param language |
| * @param log |
| */ |
| public ContextualParser(IScanner scanner, ISourceElementRequestor callback, ParserLanguage language, IParserLogService log) { |
| super(scanner, callback, language, log); |
| astFactory = ParserFactory.createASTFactory( ParserMode.COMPLETE_PARSE, language); |
| scanner.setASTFactory(astFactory); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.cdt.core.parser.IParser#parse(int) |
| */ |
| public IASTCompletionNode parse(int offset) throws ParserNotImplementedException { |
| scanner.setOffsetBoundary(offset); |
| boundaryOffset = offset; |
| translationUnit(); |
| return new ASTCompletionNode( getCompletionKind(), getCompletionScope(), getCompletionContext(), getCompletionPrefix(), reconcileKeywords( getKeywordSet(), getCompletionPrefix() ) ); |
| } |
| |
| /** |
| * @param set |
| * @param string |
| * @return |
| */ |
| private Set reconcileKeywords(Set keywords, String prefix) { |
| Set resultSet = new TreeSet(); |
| Iterator i = keywords.iterator(); |
| while( i.hasNext() ) |
| { |
| String value = (String) i.next(); |
| if( value.startsWith( prefix ) ) |
| resultSet.add( value ); |
| else if( value.compareTo( prefix ) > 0 ) |
| break; |
| } |
| return resultSet; |
| } |
| |
| /** |
| * @return |
| */ |
| private Set getKeywordSet() { |
| return keywordSet; |
| } |
| |
| /** |
| * @return |
| */ |
| private String getCompletionPrefix() { |
| return ( finalToken == null ? "" : finalToken.getImage() ); |
| } |
| |
| /** |
| * @return |
| */ |
| private IASTNode getCompletionContext() { |
| return context; |
| } |
| |
| /** |
| * @return |
| */ |
| private IASTScope getCompletionScope() { |
| return scope; |
| } |
| |
| /** |
| * @return |
| */ |
| protected IASTCompletionNode.CompletionKind getCompletionKind() { |
| return kind; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.cdt.core.parser.IParser#parse(int, int) |
| */ |
| public IASTNode parse(int startingOffset, int endingOffset) throws ParserNotImplementedException { |
| scanner.setOffsetBoundary(endingOffset); |
| translationUnit(); |
| return getCompletionContext(); |
| } |
| |
| |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.cdt.internal.core.parser.Parser#setCurrentScope(org.eclipse.cdt.core.parser.ast.IASTScope) |
| */ |
| protected void setCurrentScope(IASTScope scope) { |
| this.scope = scope; |
| } |
| |
| protected void setCompletionContext( IASTNode node ) |
| { |
| this.context = node; |
| } |
| |
| protected void setCompletionKind( IASTCompletionNode.CompletionKind kind ) |
| { |
| this.kind = kind; |
| } |
| |
| |
| protected void handleFunctionBody(IASTScope scope, boolean isInlineFunction) throws BacktrackException, EndOfFileException |
| { |
| if ( isInlineFunction ) |
| skipOverCompoundStatement(); |
| else |
| functionBody(scope); |
| } |
| |
| protected void catchBlockCompoundStatement(IASTScope scope) throws BacktrackException, EndOfFileException |
| { |
| compoundStatement(scope, true); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.cdt.internal.core.parser.Parser#handleOffsetLimitException() |
| */ |
| protected void handleOffsetLimitException(OffsetLimitReachedException exception) throws EndOfFileException, OffsetLimitReachedException { |
| setCompletionToken( exception.getFinalToken() ); |
| if( (finalToken!= null )&& (finalToken.getEndOffset() != boundaryOffset )) |
| setCompletionToken(null); |
| throw exception; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.cdt.internal.core.parser.Parser#setCompletionKeywords(java.lang.String[]) |
| */ |
| protected void setCompletionKeywords(KeywordSets.Key key) { |
| this.keywordSet = KeywordSets.getKeywords( key, language ); |
| } |
| |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.cdt.internal.core.parser.Parser#setCompletionToken(org.eclipse.cdt.core.parser.IToken) |
| */ |
| protected void setCompletionToken(IToken token) { |
| finalToken = token; |
| } |
| |
| protected IToken getCompletionToken() |
| { |
| return finalToken; |
| } |
| } |