org.hl7.fhir.utilities.xhtml.XhtmlToMarkdownConverter Maven / Gradle / Ivy
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package org.hl7.fhir.utilities.xhtml;
import org.hl7.fhir.utilities.Utilities;
public class XhtmlToMarkdownConverter {
public String convert(XhtmlNode x) {
StringBuilder b = new StringBuilder();
convert(b, x);
return b.toString();
}
private void convert(StringBuilder b, XhtmlNode x) {
for (XhtmlNode c : x.getChildNodes()) {
if (c.getNodeType() == NodeType.Text) {
paragraph(b, c, true, false);
} else if (c.getName() != null) {
convertNode(b, c);
}
}
}
public void convertNode(StringBuilder b, XhtmlNode c) throws Error {
switch (c.getName()) {
case "p":
paragraph(b, c, true, false);
break;
case "hr":
b.append("-------\r\n");
break;
case "a":
paragraph(b, c, true, false);
break;
case "h1":
b.append("# "+c.allText());
break;
case "h2":
b.append("## "+c.allText());
break;
case "h3":
b.append("### "+c.allText());
break;
case "h4":
b.append("#### "+c.allText());
break;
case "h5":
b.append("##### "+c.allText());
break;
case "h6":
b.append("###### "+c.allText());
break;
case "strong":
case "em":
case "i":
case "span":
case "img":
case "br":
case "wbr":
case "code":
case "del":
case "sup":
case "sub":
case "u":
case "b":
paragraph(b, c, true, false);
break;
case "div":
convert(b, c);
break;
case "ul":
convertUL(b, c);
break;
case "li":
convertLI(b, c);
break;
case "ol":
convertOL(b, c);
break;
case "table":
case "tbody":
convertTable(b, c);
break;
case "iframe":
convertIFrame(b, c);
break;
case "form":
case "select":
case "input":
case "textarea":
case "option":
convertForm(b, c);
break;
case "label":
case "cite":
convertLabel(b, c);
break;
case "figure":
case "figcaption":
convert(b, c);
break;
case "dl":
case "tt":
convertDL(b, c);
break;
case "blockquote":
b.append("\r\n");
b.append("> ");
paragraph(b, c, false, true);
b.append("\r\n");
break;
case "pre":
b.append("````\r\n");
convert(b, c);
b.append("\r\n````\r\n");
break;
default:
throw new Error("not done yet: "+c.getName());
}
}
private void convertDL(StringBuilder b, XhtmlNode c) {
}
private void convertIFrame(StringBuilder b, XhtmlNode c) {
b.append(c.toString());
}
private void convertForm(StringBuilder b, XhtmlNode c) {
b.append(c.toString());
}
private void convertLabel(StringBuilder b, XhtmlNode c) {
convert(b, c);
}
private void convertTable(StringBuilder b, XhtmlNode x) {
boolean first = true;
for (XhtmlNode c : x.getChildNodes()) {
if ("tbody".equals(c.getName())) {
convertTable(b, c);
} else if ("tr".equals(c.getName())) {
if (first) {
first = false;
b.append("\r\n");
}
boolean header = false;
for (XhtmlNode g : c.getChildNodes()) {
if (Utilities.existsInList(g.getName(), "td", "th")) {
if ("th".equals(g.getName())) {
header = true;
}
b.append("|");
paragraph(b, g, false, true);
}
}
b.append("\r\n");
if (header) {
for (XhtmlNode g : c.getChildNodes()) {
if (Utilities.existsInList(g.getName(), "td", "th")) {
b.append("|---");
}
}
b.append("\r\n");
}
}
}
}
private void convertUL(StringBuilder b, XhtmlNode x) {
for (XhtmlNode c : x.getChildNodes()) {
if ("li".equals(c.getName())) {
b.append("* ");
paragraph(b, c, true, true);
}
}
}
private void convertLI(StringBuilder b, XhtmlNode x) {
b.append("* ");
paragraph(b, x, true, true);
}
private void convertOL(StringBuilder b, XhtmlNode x) {
for (XhtmlNode c : x.getChildNodes()) {
if ("li".equals(c.getName())) {
b.append("1. ");
paragraph(b, c, true, true);
}
}
}
private void paragraph(StringBuilder b, XhtmlNode x, boolean mark, boolean trim) {
if (x.getNodeType() == NodeType.Text) {
addText(b, trim, x.getContent());
} else if (x.getName() != null && !Utilities.existsInList(x.getName(), "p", "li", "td", "th", "blockquote")) {
part(b, x, trim);
} else {
for (XhtmlNode c : x.getChildNodes()) {
if (c.getNodeType() == NodeType.Text) {
addText(b, trim, c.getContent());
} else {
part(b, c, trim);
}
}
if (mark) {
b.append("\r\n");
}
}
}
private void addText(StringBuilder b, boolean trim, String content) {
if (trim) {
content = content.trim();
}
if (!Utilities.noString(content)) {
b.append(content);
}
}
public void part(StringBuilder b, XhtmlNode c, boolean trim) throws Error {
switch (c.getName()) {
case "a":
b.append("[");
process(b, c, trim);
b.append("](");
b.append(c.getAttribute("href"));
b.append(")");
break;
case "img":
b.append("![");
b.append(c.allText());
b.append("](");
b.append(c.getAttribute("src"));
b.append(")");
break;
case "code":
case "pre":
b.append("```");
process(b, c, trim);
b.append("```");
case "strong":
case "em":
case "b":
b.append("**");
process(b, c, trim);
b.append("**");
break;
case "u":
b.append("_");
process(b, c, trim);
b.append("_");
break;
case "i":
b.append("*");
process(b, c, trim);
b.append("*");
break;
case "span":
case "sup":
case "sub":
case "s":
process(b, c, trim);
break;
case "div":
case "h1":
case "h2":
case "h3":
case "h4":
case "h5":
case "h6":
case "table":
case "cite":
b.append("\r\n");
convertNode(b, c);
break;
case "p":
if (!trim) {
b.append("\r\n\r\n");
}
process(b, c, trim);
break;
case "ul":
b.append("\r\n");
convertUL(b, c);
break;
case "li":
b.append("\r\n");
convertLI(b, c);
break;
case "ol":
b.append("\r\n");
convertOL(b, c);
break;
case "blockquote":
b.append("\r\n");
b.append("> ");
paragraph(b, c, false, trim);
b.append("\r\n");
break;
case "del":
case "dl":
case "dd":
case "tt":
process(b, c, trim);
case "br":
b.append("\r\n");
process(b, c, trim);
break;
case "wbr":
b.append("\r\n");
break;
default:
throw new Error("part not done yet: "+c.getName());
}
}
private void process(StringBuilder b, XhtmlNode x, boolean trim) {
for (XhtmlNode c : x.getChildNodes()) {
if (c.getNodeType() == NodeType.Text) {
b.append(c.getContent());
} else if (c.getName() != null) {
part(b, c, trim);
}
}
}
}
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