commonmark-java

allprojects {
   repositories {
       maven {
           url 'https://s01.oss.sonatype.org/content/repositories/releases/'
       }
   }
}

dependencies {
   implementation('com.gitee.chinasoft_ohos:commonmark:1.0.0')

   ......  
}

import org.commonmark.node.*;
import org.commonmark.parser.Parser;
import org.commonmark.renderer.html.HtmlRenderer;

Parser parser = Parser.builder().build();
Node document = parser.parse("This is *Sparta*");
HtmlRenderer renderer = HtmlRenderer.builder().build();
renderer.render(document);  // "<p>This is <em>Sparta</em></p>\n"

Node node = parser.parse("Example\n=======\n\nSome more text");
WordCountVisitor visitor = new WordCountVisitor();
node.accept(visitor);
visitor.wordCount;  // 4

class WordCountVisitor extends AbstractVisitor {
    int wordCount = 0;

    @Override
    public void visit(Text text) {
        // This is called for all Text nodes. Override other visit methods for other node types.

        // Count words (this is just an example, don't actually do it this way for various reasons).
        wordCount += text.getLiteral().split("\\W+").length;

        // Descend into children (could be omitted in this case because Text nodes don't have children).
        visitChildren(text);
    }
}

Parser parser = Parser.builder().build();
HtmlRenderer renderer = HtmlRenderer.builder()
        .attributeProviderFactory(new AttributeProviderFactory() {
            public AttributeProvider create(AttributeProviderContext context) {
                return new ImageAttributeProvider();
            }
        })
        .build();

Node document = parser.parse("![text](/url.png)");
renderer.render(document);
// "<p><img src=\"/url.png\" alt=\"text\" class=\"border\" /></p>\n"

class ImageAttributeProvider implements AttributeProvider {
    @Override
    public void setAttributes(Node node, String tagName, Map<String, String> attributes) {
        if (node instanceof Image) {
            attributes.put("class", "border");
        }
    }
}

Parser parser = Parser.builder().build();
HtmlRenderer renderer = HtmlRenderer.builder()
        .nodeRendererFactory(new HtmlNodeRendererFactory() {
            public NodeRenderer create(HtmlNodeRendererContext context) {
                return new IndentedCodeBlockNodeRenderer(context);
            }
        })
        .build();

Node document = parser.parse("Example:\n\n    code");
renderer.render(document);
// "<p>Example:</p>\n<pre>code\n</pre>\n"

class IndentedCodeBlockNodeRenderer implements NodeRenderer {

    private final HtmlWriter html;

    IndentedCodeBlockNodeRenderer(HtmlNodeRendererContext context) {
        this.html = context.getWriter();
    }

    @Override
    public Set<Class<? extends Node>> getNodeTypes() {
        // Return the node types we want to use this renderer for.
        return Collections.<Class<? extends Node>>singleton(IndentedCodeBlock.class);
    }

    @Override
    public void render(Node node) {
        // We only handle one type as per getNodeTypes, so we can just cast it here.
        IndentedCodeBlock codeBlock = (IndentedCodeBlock) node;
        html.line();
        html.tag("pre");
        html.text(codeBlock.getLiteral());
        html.tag("/pre");
        html.line();
    }
}

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BSD (2-clause) licensed, see LICENSE.txt file.