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.DocumentBuilder.BlockType;
import net.java.textilej.parser.markup.Block;
import net.java.textilej.parser.markup.textile.Textile;
import net.java.textilej.parser.markup.textile.TextileDialect;
/**
* Matches any textile text, including lines starting with <code>p. </code>.
*
* @author dgreen
*/
public class ParagraphBlock extends Block {
private static final int LINE_REMAINDER_GROUP_OFFSET = Textile.ATTRIBUTES_BLOCK_GROUP_COUNT+1;
static final Pattern startPattern = Pattern.compile("p"+Textile.REGEX_BLOCK_ATTRIBUTES+"\\.\\s+(.*)");
private int blockLineCount = 0;
private boolean unwrapped = false;
public ParagraphBlock() {
}
@Override
public int processLineContent(String line,int offset) {
if (blockLineCount == 0) {
Attributes attributes = new Attributes();
if (offset == 0) {
// 0-offset matches may start with the "p. " prefix.
Matcher matcher = startPattern.matcher(line);
if (matcher.matches()) {
Textile.configureAttributes(attributes,matcher, 1,true);
offset = matcher.start(LINE_REMAINDER_GROUP_OFFSET);
} else {
if (line.charAt(0) == ' ') {
offset = 1;
unwrapped = true;
}
}
}
if (!unwrapped) {
builder.beginBlock(BlockType.PARAGRAPH, attributes);
}
}
if (dialect.isEmptyLine(line)) {
setClosed(true);
return 0;
}
TextileDialect dialect = (TextileDialect) getDialect();
// NOTE: in Textile paragraphs can have nested lists and other things, however
// the resulting XHTML is invalid -- so here we allow for similar constructs
// however we cause them to end the paragraph rather than being nested.
for (Block block: dialect.getParagraphBreakingBlocks()) {
if (block.canStart(line, offset)) {
setClosed(true);
return 0;
}
}
if (blockLineCount != 0) {
if (unwrapped) {
builder.characters("\n");
} else {
builder.lineBreak();
}
}
++blockLineCount;
dialect.emitMarkupLine(getParser(),state,line, offset);
return -1;
}
@Override
public boolean canStart(String line, int lineOffset) {
unwrapped = false;
blockLineCount = 0;
return true;
}
@Override
public void setClosed(boolean closed) {
if (closed && !isClosed()) {
if (!unwrapped) {
builder.endBlock();
}
}
super.setClosed(closed);
}
}