Move hiding of boring lines into static content (#846)
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859659f197
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@ -6,6 +6,7 @@ use crate::renderer::{RenderContext, Renderer};
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use crate::theme::{self, playpen_editor, Theme};
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use crate::utils;
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use std::borrow::Cow;
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use std::collections::BTreeMap;
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use std::collections::HashMap;
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use std::fs;
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@ -584,6 +585,7 @@ fn fix_code_blocks(html: &str) -> String {
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}
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fn add_playpen_pre(html: &str, playpen_config: &Playpen) -> String {
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let boring_line_regex = Regex::new(r"^(\s*)#(#|.)(.*)$").unwrap();
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let regex = Regex::new(r##"((?s)<code[^>]?class="([^"]+)".*?>(.*?)</code>)"##).unwrap();
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regex
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.replace_all(html, |caps: &Captures<'_>| {
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@ -597,21 +599,45 @@ fn add_playpen_pre(html: &str, playpen_config: &Playpen) -> String {
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|| classes.contains("mdbook-runnable")
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{
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// wrap the contents in an external pre block
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if playpen_config.editable && classes.contains("editable")
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format!("<pre class=\"playpen\"><code class=\"{}\">{}</code></pre>",
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classes,
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{
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let content: Cow<str> = if playpen_config.editable && classes.contains("editable")
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|| text.contains("fn main")
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|| text.contains("quick_main!")
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{
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format!("<pre class=\"playpen\">{}</pre>", text)
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code.into()
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} else {
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// we need to inject our own main
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let (attrs, code) = partition_source(code);
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format!(
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"<pre class=\"playpen\"><code class=\"{}\">\n# \
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#![allow(unused_variables)]\n{}#fn main() {{\n{}#}}</code></pre>",
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classes, attrs, code
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)
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format!("\n# #![allow(unused_variables)]\n{}#fn main() {{\n{}#}}",
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attrs, code
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).into()
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};
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let mut prev_line_hidden = false;
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let mut result = String::with_capacity(content.len());
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for line in content.lines() {
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if let Some(caps) = boring_line_regex.captures(line) {
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if !prev_line_hidden && &caps[2] != "#" {
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result += "<span class=\"boring\">";
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prev_line_hidden = true;
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}
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result += &caps[1];
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if &caps[2] != " " { result += &caps[2]; }
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result += &caps[3];
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} else {
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if prev_line_hidden {
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result += "</span>";
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prev_line_hidden = false;
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}
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result += line;
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}
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result += "\n";
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}
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result
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}
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)
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} else {
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// not language-rust, so no-op
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text.to_owned()
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@ -687,4 +713,22 @@ mod tests {
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assert_eq!(got, should_be);
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}
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}
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#[test]
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fn add_playpen() {
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let inputs = [
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("<code class=\"language-rust\">x()</code>",
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"<pre class=\"playpen\"><code class=\"language-rust\">\n<span class=\"boring\">#![allow(unused_variables)]\nfn main() {\n</span>x()\n<span class=\"boring\">}\n</code></pre>"),
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("<code class=\"language-rust\">fn main() {}</code>",
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"<pre class=\"playpen\"><code class=\"language-rust\">fn main() {}\n</code></pre>"),
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("<code class=\"language-rust editable\">let s = \"foo\n # bar\n\";</code>",
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"<pre class=\"playpen\"><code class=\"language-rust editable\">let s = \"foo\n<span class=\"boring\"> bar\n</span>\";\n</code></pre>"),
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("<code class=\"language-rust editable\">let s = \"foo\n ## bar\n\";</code>",
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"<pre class=\"playpen\"><code class=\"language-rust editable\">let s = \"foo\n # bar\n\";\n</code></pre>"),
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];
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for (src, should_be) in &inputs {
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let got = add_playpen_pre(src, &Playpen { editable: true, ..Playpen::default() });
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assert_eq!(&*got, *should_be);
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}
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}
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}
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@ -161,72 +161,34 @@ function playpen_text(playpen) {
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Array.from(document.querySelectorAll("code.language-rust")).forEach(function (block) {
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var code_block = block;
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var pre_block = block.parentNode;
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// hide lines
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var lines = code_block.innerHTML.split("\n");
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var first_non_hidden_line = false;
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var lines_hidden = false;
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var trimmed_line = "";
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for (var n = 0; n < lines.length; n++) {
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trimmed_line = lines[n].trim();
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if (trimmed_line[0] == hiding_character && trimmed_line[1] != hiding_character) {
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if (first_non_hidden_line) {
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lines[n] = "<span class=\"hidden\">" + "\n" + lines[n].replace(/(\s*)# ?/, "$1") + "</span>";
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}
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else {
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lines[n] = "<span class=\"hidden\">" + lines[n].replace(/(\s*)# ?/, "$1") + "\n" + "</span>";
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}
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lines_hidden = true;
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}
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else if (first_non_hidden_line) {
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lines[n] = "\n" + lines[n];
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}
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else {
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first_non_hidden_line = true;
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}
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if (trimmed_line[0] == hiding_character && trimmed_line[1] == hiding_character) {
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lines[n] = lines[n].replace("##", "#")
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}
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}
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code_block.innerHTML = lines.join("");
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var lines = Array.from(block.querySelectorAll('.boring'));
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// If no lines were hidden, return
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if (!lines_hidden) { return; }
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if (!lines.length) { return; }
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block.classList.add("hide-boring");
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var buttons = document.createElement('div');
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buttons.className = 'buttons';
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buttons.innerHTML = "<button class=\"fa fa-expand\" title=\"Show hidden lines\" aria-label=\"Show hidden lines\"></button>";
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// add expand button
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var pre_block = block.parentNode;
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pre_block.insertBefore(buttons, pre_block.firstChild);
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pre_block.querySelector('.buttons').addEventListener('click', function (e) {
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if (e.target.classList.contains('fa-expand')) {
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var lines = pre_block.querySelectorAll('span.hidden');
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e.target.classList.remove('fa-expand');
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e.target.classList.add('fa-compress');
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e.target.title = 'Hide lines';
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e.target.setAttribute('aria-label', e.target.title);
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Array.from(lines).forEach(function (line) {
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line.classList.remove('hidden');
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line.classList.add('unhidden');
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});
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block.classList.remove('hide-boring');
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} else if (e.target.classList.contains('fa-compress')) {
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var lines = pre_block.querySelectorAll('span.unhidden');
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e.target.classList.remove('fa-compress');
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e.target.classList.add('fa-expand');
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e.target.title = 'Show hidden lines';
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e.target.setAttribute('aria-label', e.target.title);
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Array.from(lines).forEach(function (line) {
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line.classList.remove('unhidden');
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line.classList.add('hidden');
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});
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block.classList.add('hide-boring');
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}
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});
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});
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@ -22,8 +22,9 @@ code {
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.left { float: left; }
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.right { float: right; }
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.boring { opacity: 0.6; }
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.hide-boring .boring { display: none; }
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.hidden { display: none; }
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.play-button.hidden { display: none; }
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h2, h3 { margin-top: 2.5em; }
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h4, h5 { margin-top: 2em; }
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