org.eclipse.mylyn.internal.wikitext.commonmark.inlines.BackslashEscapeSpan.java Source code

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Here is the source code for org.eclipse.mylyn.internal.wikitext.commonmark.inlines.BackslashEscapeSpan.java

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/*******************************************************************************
 * Copyright (c) 2015 David Green.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     David Green - initial API and implementation
 *******************************************************************************/

package org.eclipse.mylyn.internal.wikitext.commonmark.inlines;

import com.google.common.base.CharMatcher;
import com.google.common.base.Optional;

public class BackslashEscapeSpan extends SourceSpan {

    private static CharMatcher ESCAPABLE = CharMatcher.anyOf("!\"\\#$%&'()*+,-./:;<=>?@[]^_`{|}~");

    @Override
    public Optional<? extends Inline> createInline(Cursor cursor) {
        char c = cursor.getChar();
        if (c == '\\' && cursor.hasNext()) {
            if (cursor.getNext() == '\n') {
                return Optional.of(new HardLineBreak(cursor.getLineAtOffset(), cursor.getOffset(), 2));
            } else if (ESCAPABLE.matches(cursor.getNext())) {
                return Optional
                        .of(new EscapedCharacter(cursor.getLineAtOffset(), cursor.getOffset(), cursor.getNext()));
            }
        }
        return Optional.absent();
    }

}