Merge pull request #222 from steveklabnik/gh29
Implement playpen support for ```rust
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commit
c6a5d12002
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@ -97,12 +97,11 @@ impl Renderer for HtmlHandlebars {
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let filename = Path::new(&ch.path).with_extension("html");
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// create links for headers and fix anchors
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// Do several kinds of post-processing
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let rendered = build_header_links(rendered, filename.to_str().unwrap_or(""));
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let rendered = fix_anchor_links(rendered, filename.to_str().unwrap_or(""));
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// fix code blocks
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let rendered = fix_code_blocks(rendered);
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let rendered = add_playpen_pre(rendered);
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// Write to file
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info!("[*] Creating {:?} ✓", filename.display());
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@ -146,11 +145,12 @@ impl Renderer for HtmlHandlebars {
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debug!("[*]: Render template");
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let rendered = try!(handlebars.render("index", &data));
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// do several kinds of post-processing
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let rendered = build_header_links(rendered, "print.html");
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let rendered = fix_anchor_links(rendered, "print.html");
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// fix code blocks
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let rendered = fix_code_blocks(rendered);
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let rendered = add_playpen_pre(rendered);
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try!(book.write_file(Path::new("print").with_extension("html"), &rendered.into_bytes()));
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info!("[*] Creating print.html ✓");
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@ -292,3 +292,30 @@ fn fix_code_blocks(html: String) -> String {
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format!("<code{before}class=\"{classes}\"{after}>", before=before, classes=classes, after=after)
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}).into_owned()
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}
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fn add_playpen_pre(html: String) -> String {
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let regex = Regex::new(r##"((?s)<code[^>]?class="([^"]+)".*?>(.*?)</code>)"##).unwrap();
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regex.replace_all(&html, |caps: &Captures| {
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let text = &caps[1];
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let classes = &caps[2];
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let code = &caps[3];
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if classes.contains("language-rust") && !classes.contains("ignore") {
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// wrap the contents in an external pre block
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if text.contains("fn main") {
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format!("<pre class=\"playpen\">{}</pre>", text)
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} else {
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// we need to inject our own main
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format!("<pre class=\"playpen\"><code class=\"{}\"># #![allow(unused_variables)]
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#
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#fn main() {{
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{}
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#}}</code></pre>", classes, code)
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}
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} else {
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// not language-rust, so no-op
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format!("{}", text)
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}
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}).into_owned()
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}
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