Migrate Markdown text format plugin from ImageJ

Migrated from:
https://github.com/imagej/imagej/tree/imagej-2.0.0-beta-7.9/plugins/text

Author: ctrueden

src/main/java/org/scijava/plugins/text/markdown/MarkdownTextFormat.java

@@ -0,0 +1,63 @@
+/*
+ * #%L
+ * ImageJ software for multidimensional image processing and analysis.
+ * %%
+ * Copyright (C) 2009 - 2014 Board of Regents of the University of
+ * Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
+ * Institute of Molecular Cell Biology and Genetics.
+ * %%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * #L%
+ */
+
+package org.scijava.plugins.text.markdown;
+
+import com.petebevin.markdown.MarkdownProcessor;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.scijava.plugin.Plugin;
+import org.scijava.text.AbstractTextFormat;
+import org.scijava.text.TextFormat;
+
+/**
+ * Text format for <a
+ * href="http://daringfireball.net/projects/markdown/">Markdown</a>.
+ * 
+ * @author Curtis Rueden
+ */
+@Plugin(type = TextFormat.class)
+public class MarkdownTextFormat extends AbstractTextFormat {
+
+	@Override
+	public List<String> getExtensions() {
+		return Arrays.asList("md", "markdown");
+	}
+
+	@Override
+	public String asHTML(final String text) {
+		final MarkdownProcessor markdown = new MarkdownProcessor();
+		return markdown.markdown(text);
+	}
+
+}