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Hide lines in ignored code blocks

This commit is contained in:
Benedikt Werner 2019-11-07 02:20:10 +01:00
parent f5549f2267
commit 8fffb2a704
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GPG Key ID: 1DBFF0F8E9E121EB
1 changed files with 60 additions and 49 deletions
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109
src/renderer/html_handlebars/hbs_renderer.rs
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@ -601,7 +601,6 @@ fn fix_code_blocks(html: &str) -> String {
}
fn add_playpen_pre(html: &str, playpen_config: &Playpen) -> String {
let boring_line_regex = Regex::new(r"^(\s*)#(.?)(.*)$").unwrap();
let regex = Regex::new(r##"((?s)<code[^>]?class="([^"]+)".*?>(.*?)</code>)"##).unwrap();
regex
.replace_all(html, |caps: &Captures<'_>| {
@ -609,57 +608,37 @@ fn add_playpen_pre(html: &str, playpen_config: &Playpen) -> String {
let classes = &caps[2];
let code = &caps[3];
if (classes.contains("language-rust")
&& !classes.contains("ignore")
&& !classes.contains("noplaypen"))
|| classes.contains("mdbook-runnable")
{
// wrap the contents in an external pre block
format!(
"<pre class=\"playpen\"><code class=\"{}\">{}</code></pre>",
classes,
{
let content: Cow<'_, str> = if playpen_config.editable
&& classes.contains("editable")
|| text.contains("fn main")
|| text.contains("quick_main!")
if classes.contains("language-rust") {
if (!classes.contains("ignore") && !classes.contains("noplaypen"))
|| classes.contains("mdbook-runnable")
{
// wrap the contents in an external pre block
format!(
"<pre class=\"playpen\"><code class=\"{}\">{}</code></pre>",
classes,
{
code.into()
} else {
// we need to inject our own main
let (attrs, code) = partition_source(code);
format!(
"\n# #![allow(unused_variables)]\n{}#fn main() {{\n{}#}}",
attrs, code
)
.into()
};
let mut prev_line_hidden = false;
let mut result = String::with_capacity(content.len());
for line in content.lines() {
if let Some(caps) = boring_line_regex.captures(line) {
if !prev_line_hidden && &caps[2] != "#" {
result += "<span class=\"boring\">";
prev_line_hidden = true;
}
result += &caps[1];
if &caps[2] != " " {
result += &caps[2];
}
result += &caps[3];
let content: Cow<'_, str> = if playpen_config.editable
&& classes.contains("editable")
|| text.contains("fn main")
|| text.contains("quick_main!")
{
code.into()
} else {
if prev_line_hidden {
result += "</span>";
prev_line_hidden = false;
}
result += line;
}
result += "\n";
// we need to inject our own main
let (attrs, code) = partition_source(code);
format!(
"\n# #![allow(unused_variables)]\n{}#fn main() {{\n{}#}}",
attrs, code
)
.into()
};
hide_lines(&content)
}
result
}
)
)
} else {
format!("<code class=\"{}\">{}</code>", classes, hide_lines(code))
}
} else {
// not language-rust, so no-op
text.to_owned()
@ -668,6 +647,36 @@ fn add_playpen_pre(html: &str, playpen_config: &Playpen) -> String {
.into_owned()
}
lazy_static! {
static ref BORING_LINES_REGEX: Regex = Regex::new(r"^(\s*)#(.?)(.*)$").unwrap();
}
fn hide_lines(content: &str) -> String {
let mut prev_line_hidden = false;
let mut result = String::with_capacity(content.len());
for line in content.lines() {
if let Some(caps) = BORING_LINES_REGEX.captures(line) {
if !prev_line_hidden && &caps[2] != "#" {
result += "<span class=\"boring\">";
prev_line_hidden = true;
}
result += &caps[1];
if &caps[2] != " " {
result += &caps[2];
}
result += &caps[3];
} else {
if prev_line_hidden {
result += "</span>";
prev_line_hidden = false;
}
result += line;
}
result += "\n";
}
result
}
fn partition_source(s: &str) -> (String, String) {
let mut after_header = false;
let mut before = String::new();
@ -749,6 +758,8 @@ mod tests {
"<pre class=\"playpen\"><code class=\"language-rust editable\">let s = \"foo\n # bar\n\";\n</code></pre>"),
("<code class=\"language-rust editable\">let s = \"foo\n # bar\n#\n\";</code>",
"<pre class=\"playpen\"><code class=\"language-rust editable\">let s = \"foo\n<span class=\"boring\"> bar\n\n</span>\";\n</code></pre>"),
("<code class=\"language-rust ignore\">let s = \"foo\n # bar\n#\n\";</code>",
"<code class=\"language-rust ignore\">let s = \"foo\n<span class=\"boring\"> bar\n\n</span>\";\n</code>"),
];
for (src, should_be) in &inputs {
let got = add_playpen_pre(