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

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/* $Id: MathEnvironmentHandler.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.BuiltinEnvironment;
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.EnvironmentToken;

import org.w3c.dom.Element;

/**
 * Builds LaTeX math environments. Note that this might be inside an mbox inside an existing math
 * environment.
 *
 * @author David McKain
 * @version $Revision: 525 $
 */
public final class MathEnvironmentHandler implements EnvironmentHandler {

  public void handleEnvironment(DOMBuilder builder, Element parentElement, EnvironmentToken token)
      throws SnuggleParseException {
    BuiltinEnvironment environment = token.getEnvironment();
    if (builder.isBuildingMathMLIsland()) {
      /* We're putting maths inside maths (e.g. \mbox{$ $}) so make a  */
      Element mrow = builder.appendMathMLElement(parentElement, "mrow");
      builder.handleTokens(mrow, token.getContent(), false);
    } else {
      boolean isDisplayMath = environment == CorePackageDefinitions.ENV_DISPLAYMATH;
      builder.buildMathElement(parentElement, token, token.getContent(), isDisplayMath);
    }
  }
}