net.java.textilej.parser.markup.textile.block.QuoteBlock Maven / Gradle / Ivy

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package net.java.textilej.parser.markup.textile.block;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import net.java.textilej.parser.Attributes;
import net.java.textilej.parser.QuoteAttributes;
import net.java.textilej.parser.DocumentBuilder.BlockType;
import net.java.textilej.parser.markup.Block;
import net.java.textilej.parser.markup.textile.Textile;

/**
 * quoted text block, matches blocks that start with bc. .  
 * Creates an extended block type of {@link ParagraphBlock paragraph}.
 * 
 * @author dgreen
 */
public class QuoteBlock extends Block {

	private static final int LINE_REMAINDER_GROUP = Textile.ATTRIBUTES_BLOCK_GROUP_COUNT+3;
	private static final int CITATION_GROUP = Textile.ATTRIBUTES_BLOCK_GROUP_COUNT+2;
	private static final int EXTENDED_GROUP = Textile.ATTRIBUTES_BLOCK_GROUP_COUNT+1;

	static final Pattern startPattern = Pattern.compile("bq"+Textile.REGEX_BLOCK_ATTRIBUTES+"\\.(\\.)?(?::(https?://[^\\s]*))?\\s+(.*)");

	private boolean extended;
	private boolean paraOpen;
	private int blockLineCount = 0;
	private Matcher matcher;
	
	public QuoteBlock() {
	}

	@Override
	public int processLineContent(String line,int offset) {
		if (blockLineCount == 0) {
			QuoteAttributes attributes = new QuoteAttributes();
			
			Textile.configureAttributes(attributes,matcher, 1,true);
			
			attributes.setCitation(matcher.group(CITATION_GROUP));
			
			offset = matcher.start(LINE_REMAINDER_GROUP);
			extended = matcher.group(EXTENDED_GROUP) != null;
			
			builder.beginBlock(BlockType.QUOTE, attributes);
			builder.beginBlock(BlockType.PARAGRAPH, new Attributes());
			paraOpen = true;
		}
		if (dialect.isEmptyLine(line)) {
			if (!extended) {
				setClosed(true);
				return 0;
			} else {
				if (paraOpen) {
					builder.endBlock(); // para
					paraOpen = false;
				}
				return 0;
			}
		} else if (extended && Textile.explicitBlockBegins(line,offset)) {
			setClosed(true);
			return offset;
		}
		if (blockLineCount != 0) {
			if (paraOpen) {
				builder.lineBreak();
			} else {
				builder.beginBlock(BlockType.PARAGRAPH, new Attributes());
				paraOpen = true;
			}
		}
		++blockLineCount;
		
		getDialect().emitMarkupLine(getParser(),state,line, offset);
		
		return -1;
	}

	@Override
	public boolean canStart(String line, int lineOffset) {
		blockLineCount = 0;
		if (lineOffset == 0) {
			matcher = startPattern.matcher(line);
			return matcher.matches();
		} else {
			matcher = null;
			return false;
		}
	}

	@Override
	public void setClosed(boolean closed) {
		if (closed && !isClosed()) {
			if (paraOpen) {
				builder.endBlock(); // para
				paraOpen = false;
			}
			builder.endBlock(); // quote
		}
		super.setClosed(closed);
	}	
}