uk.ac.ed.ph.snuggletex.dombuilding.ParagraphHandler Maven / Gradle / Ivy

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/* $Id: ParagraphHandler.java 525 2010-01-05 14:07:36Z davemckain $
 *
 * Copyright (c) 2010, The University of Edinburgh.
 * All Rights Reserved
 */
package uk.ac.ed.ph.snuggletex.dombuilding;

import uk.ac.ed.ph.snuggletex.definitions.CorePackageDefinitions;
import uk.ac.ed.ph.snuggletex.internal.DOMBuilder;
import uk.ac.ed.ph.snuggletex.internal.SnuggleParseException;
import uk.ac.ed.ph.snuggletex.tokens.CommandToken;
import uk.ac.ed.ph.snuggletex.tokens.FlowToken;

import java.util.List;

import org.w3c.dom.DOMException;
import org.w3c.dom.Element;

/**
 * This builds the content of a (fixed) {@link CorePackageDefinitions#CMD_PARAGRAPH} token.
 *
 * @author David McKain
 * @version $Revision: 525 $
 */
public final class ParagraphHandler implements CommandHandler {

  public void handleCommand(DOMBuilder builder, Element parentElement, CommandToken token)
      throws SnuggleParseException {
    buildParagraph(builder, parentElement, token.getArguments()[0].getContents());
  }

  /**
   * Builds a single paragraph, being careful to consider how best to represent it in the output
   * tree at the existing position.
   *
   * @param builder
   * @param parentElement
   * @param inlineContent
   * @throws DOMException
   * @throws SnuggleParseException
   */
  private void buildParagraph(
      DOMBuilder builder, Element parentElement, List inlineContent)
      throws SnuggleParseException {
    Element resultElement;
    boolean isInline;
    if (builder.isBuildingMathMLIsland()) {
      /* Paragraphs inside MathML are not allowed!
       *
       * So we won't create an element. Instead, once building reaching the text content,
       * it will be wrapped inside an 
       */
      resultElement = parentElement;
      isInline = true;
    } else {
      resultElement = builder.appendXHTMLElement(parentElement, "p");
      isInline = false;
    }

    /* Handle content */
    builder.handleTokens(resultElement, inlineContent, !isInline);
  }
}