net.java.textilej.parser.markup.trac.block.TableBlock Maven / Gradle / Ivy

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

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

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

/**
 * Table block, matches any line that looks like a table row.
 * 
 * @author dgreen
 */
public class TableBlock extends Block {

	static final Pattern tableRowPattern = Pattern.compile("(\\|\\|(.*)?(\\|\\|\\s*$))");

	static final Pattern TABLE_ROW_PATTERN = Pattern.compile("\\|\\|\\s*([^\\|]*)\\s*(\\|\\|\\s*$)?");
		
	private int blockLineCount = 0;
	private Matcher matcher;
	
	public TableBlock() {
	}

	@Override
	public int processLineContent(String line,int offset) {
		if (blockLineCount == 0) {
			Attributes attributes = new Attributes();
			builder.beginBlock(BlockType.TABLE, attributes);
		} else {
			matcher = tableRowPattern.matcher(line);
			if (!matcher.matches()) {
				setClosed(true);
				return 0;
			}
		}
		++blockLineCount;
		
		String textileLine = offset==0?line:line.substring(offset);
		Matcher rowMatcher = TABLE_ROW_PATTERN.matcher(textileLine);
		if (!rowMatcher.find()) {
			setClosed(true);
			return 0;
		}
		
		builder.beginBlock(BlockType.TABLE_ROW, new Attributes());
		
		do {
			int start = rowMatcher.start();
			if (start == textileLine.length()-1) {
				break;
			}
		
			String text = rowMatcher.group(1);
			int textOffset = rowMatcher.start(1);
			
			Attributes attributes = new Attributes();
			state.setLineCharacterOffset(start);
			builder.beginBlock(BlockType.TABLE_CELL_NORMAL, attributes);

			dialect.emitMarkupLine(getParser(), state,textOffset, text, 0);
			
			builder.endBlock(); // table cell
		} while (rowMatcher.find());
		
		builder.endBlock(); // table row
		
		return -1;
	}

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

	@Override
	public void setClosed(boolean closed) {
		if (closed && !isClosed()) {
			builder.endBlock();
		}
		super.setClosed(closed);
	}

	
}