+ // Think about adding <section> and/or </section>s.
+ if (style.category() == from_utf8("Sectioning")) {
+ int level = style.toclevel;
+
+ // Need to close a previous section if it has the same level or a higher one (close <section> if opening a
+ // <h2> after a <h2>, <h3>, <h4>, <h5> or <h6>). More examples:
+ // - current: h2; back: h1; do not close any <section>
+ // - current: h1; back: h2; close two <section> (first the <h2>, then the <h1>, so a new <h1> can come)
+ while (!headerLevels.empty() && level <= headerLevels.top()) {
+ // Output the tag only if it corresponds to a legit section.
+ int stackLevel = headerLevels.top();
+ if (stackLevel != Layout::NOT_IN_TOC && level > 1) { // <h1> is the document title.
+ xs << xml::EndTag("section");
+ xs << xml::CR();
+ }
+ headerLevels.pop();
+ }
+
+ // Open the new section: first push it onto the stack, then output it in XHTML.
+ headerLevels.push(level);
+ // Some sectioning-like elements should not be output (such as FrontMatter).
+ if (level != Layout::NOT_IN_TOC && level > 1) { // <h1> is the document title.
+ xs << xml::StartTag("section");
+ xs << xml::CR();
+ }
+ }
+