MarkupLine.java
/*
* Portions of this software was developed by employees of the National Institute
* of Standards and Technology (NIST), an agency of the Federal Government and is
* being made available as a public service. Pursuant to title 17 United States
* Code Section 105, works of NIST employees are not subject to copyright
* protection in the United States. This software may be subject to foreign
* copyright. Permission in the United States and in foreign countries, to the
* extent that NIST may hold copyright, to use, copy, modify, create derivative
* works, and distribute this software and its documentation without fee is hereby
* granted on a non-exclusive basis, provided that this notice and disclaimer
* of warranty appears in all copies.
*
* THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
* EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
* THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
* INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
* SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT
* SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
* INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
* OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
* CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
* PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
* OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
*/
package gov.nist.secauto.metaschema.core.datatype.markup;
import com.vladsch.flexmark.html.HtmlRenderer;
import com.vladsch.flexmark.parser.Parser;
import com.vladsch.flexmark.util.ast.Block;
import com.vladsch.flexmark.util.ast.Document;
import com.vladsch.flexmark.util.ast.Node;
import com.vladsch.flexmark.util.data.DataSet;
import com.vladsch.flexmark.util.data.MutableDataSet;
import com.vladsch.flexmark.util.misc.Extension;
import gov.nist.secauto.metaschema.core.datatype.markup.flexmark.FlexmarkConfiguration;
import gov.nist.secauto.metaschema.core.datatype.markup.flexmark.FlexmarkFactory;
import gov.nist.secauto.metaschema.core.datatype.markup.flexmark.SuppressPTagExtension;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import edu.umd.cs.findbugs.annotations.NonNull;
public class MarkupLine
extends AbstractMarkupString<MarkupLine> {
@NonNull
private static final DataSet FLEXMARK_CONFIG = newParserOptions();
@NonNull
private static final FlexmarkFactory FLEXMARK_FACTORY = new FlexmarkFactory(FLEXMARK_CONFIG);
@SuppressWarnings("null")
@NonNull
protected static DataSet newParserOptions() {
MutableDataSet options = new MutableDataSet();
// disable inline HTML
options.set(Parser.HTML_BLOCK_PARSER, false);
// disable list processing
options.set(Parser.LIST_BLOCK_PARSER, false);
options.set(HtmlRenderer.SUPPRESS_HTML_BLOCKS, true);
Collection<Extension> currentExtensions = Parser.EXTENSIONS.get(FlexmarkConfiguration.FLEXMARK_CONFIG);
List<Extension> extensions = new LinkedList<>(currentExtensions);
extensions.add(SuppressPTagExtension.create());
Parser.EXTENSIONS.set(options, extensions);
return FlexmarkConfiguration.newFlexmarkConfig(options);
}
@NonNull
public static MarkupLine fromHtml(@NonNull String html) {
return new MarkupLine(
parseHtml(html, FLEXMARK_FACTORY.getFlexmarkHtmlConverter(), FLEXMARK_FACTORY.getMarkdownParser()));
}
@NonNull
public static MarkupLine fromMarkdown(@NonNull String markdown) {
return new MarkupLine(parseMarkdown(markdown, FLEXMARK_FACTORY.getMarkdownParser()));
}
@Override
public FlexmarkFactory getFlexmarkFactory() {
return FLEXMARK_FACTORY;
}
protected MarkupLine(@NonNull Document astNode) {
super(astNode);
Node child = astNode.getFirstChild();
if (child instanceof Block && child.getNext() != null) {
throw new IllegalStateException("multiple blocks not allowed");
} // else empty markdown
}
@Override
public MarkupLine copy() {
// TODO: find a way to do a deep copy
// this is a shallow copy that uses the same underlying Document object
return new MarkupLine(getDocument());
}
@Override
public boolean isBlock() {
return false;
}
}