| /******************************************************************************* |
| * Copyright (c) 2009 David Green and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * David Green - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.wikitext.ui.util.css.editor; |
| |
| import org.eclipse.jface.text.rules.ICharacterScanner; |
| import org.eclipse.jface.text.rules.IPredicateRule; |
| import org.eclipse.jface.text.rules.IRule; |
| import org.eclipse.jface.text.rules.IToken; |
| import org.eclipse.jface.text.rules.Token; |
| |
| /** |
| * detects property name by finding word characters that are terminated by whitespace followed by a colon. the trailing |
| * colon is not included in the name. |
| * |
| * @author David Green |
| */ |
| class PropertyNameRule implements IRule, IPredicateRule { |
| |
| private final Token token; |
| |
| private int readCount = 0; |
| |
| public PropertyNameRule(Token token) { |
| this.token = token; |
| } |
| |
| public IToken evaluate(ICharacterScanner scanner) { |
| return evaluate(scanner, false); |
| } |
| |
| public IToken evaluate(ICharacterScanner scanner, boolean resume) { |
| readCount = 0; |
| if (resume) { |
| if (endSequenceDetected(scanner)) { |
| return token; |
| } |
| } else { |
| if (startSequenceDetected(scanner)) { |
| if (endSequenceDetected(scanner)) { |
| return token; |
| } |
| } |
| } |
| while (readCount > 0) { |
| --readCount; |
| scanner.unread(); |
| } |
| return Token.UNDEFINED; |
| } |
| |
| private boolean endSequenceDetected(ICharacterScanner scanner) { |
| // must hit EOF or ':' but not ';' '{' '}' '/' or '*' |
| int read = read(scanner); |
| for (;; read = read(scanner)) { |
| if (read == ICharacterScanner.EOF || read == ':') { |
| scanner.unread(); |
| --readCount; |
| return true; |
| } |
| if (read == ';' || read == '{' || read == '}' || read == '/' || read == '*') { |
| return false; |
| } |
| } |
| } |
| |
| private boolean startSequenceDetected(ICharacterScanner scanner) { |
| int read = read(scanner); |
| if (isWordChar(read)) { |
| return true; |
| } |
| return false; |
| } |
| |
| private boolean isWordChar(int read) { |
| return read != ICharacterScanner.EOF && read != '{' && read != '}' && read != ':' && read != ';' && read != '/' |
| && read != '*' && read != ',' && !Character.isWhitespace(read); |
| } |
| |
| private int read(ICharacterScanner scanner) { |
| ++readCount; |
| return scanner.read(); |
| } |
| |
| public IToken getSuccessToken() { |
| return token; |
| } |
| |
| } |