/*=============================================================================#
 # Copyright (c) 2015-2016 David Green and others.
 # 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 in Mylyn
 #     Stephan Wahlbrink (WalWare.de) - revised API and implementation
 #=============================================================================*/

package de.walware.docmlet.wikitext.internal.commonmark.core.blocks;

import org.eclipse.mylyn.wikitext.core.parser.DocumentBuilder;

import de.walware.docmlet.wikitext.internal.commonmark.core.CommonmarkLocator;
import de.walware.docmlet.wikitext.internal.commonmark.core.Line;
import de.walware.docmlet.wikitext.internal.commonmark.core.LineSequence;
import de.walware.docmlet.wikitext.internal.commonmark.core.ProcessingContext;
import de.walware.docmlet.wikitext.internal.commonmark.core.SourceBlock;
import de.walware.docmlet.wikitext.internal.commonmark.core.SourceBlockItem;
import de.walware.docmlet.wikitext.internal.commonmark.core.SourceBlocks.SourceBlockBuilder;


public class EmptyBlock extends SourceBlock {
	
	
	private static class EmptyBlockItem extends SourceBlockItem<EmptyBlock> {
		
		public EmptyBlockItem(final EmptyBlock type, final SourceBlockBuilder builder) {
			super(type, builder);
		}
		
		
		@Override
		public boolean isEmpty() {
			return true;
		}
		
	}
	
	
	public EmptyBlock() {
	}
	
	
	@Override
	public boolean canStart(final LineSequence lineSequence, final SourceBlockItem<?> currentBlockItem) {
		final Line startLine= lineSequence.getCurrentLine();
		return (startLine != null
				&& startLine.isBlank() );
	}
	
	@Override
	public void createItem(final SourceBlockBuilder builder, final LineSequence lineSequence) {
		final SourceBlockItem<EmptyBlock> blockItem= new EmptyBlockItem(this, builder);
		
		advanceBlankLines(lineSequence);
	}
	
	@Override
	public void initializeContext(final ProcessingContext context, final SourceBlockItem<?> blockItem) {
	}
	
	@Override
	public void emit(final ProcessingContext context, final SourceBlockItem<?> blockItem, final CommonmarkLocator locator, final DocumentBuilder builder) {
	}
	
}