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Avoid empty last line in editable code blocks #1836

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Aug 11, 2022
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Avoid empty last line in editable code blocks #1836

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49 changes: 26 additions & 23 deletions src/renderer/html_handlebars/hbs_renderer.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -903,13 +903,16 @@ fn hide_lines(content: &str) -> String {
}

let mut result = String::with_capacity(content.len());
for line in content.lines() {
let mut lines = content.lines().peekable();
while let Some(line) = lines.next() {
// Don't include newline on the last line.
let newline = if lines.peek().is_none() { "" } else { "\n" };
if let Some(caps) = BORING_LINES_REGEX.captures(line) {
if &caps[2] == "#" {
result += &caps[1];
result += &caps[2];
result += &caps[3];
result += "\n";
result += newline;
continue;
} else if &caps[2] != "!" && &caps[2] != "[" {
result += "<span class=\"boring\">";
Expand All @@ -918,13 +921,13 @@ fn hide_lines(content: &str) -> String {
result += &caps[2];
}
result += &caps[3];
result += "\n";
result += newline;
result += "</span>";
continue;
}
}
result += line;
result += "\n";
result += newline;
}
result
}
Expand Down Expand Up @@ -1004,19 +1007,19 @@ mod tests {
fn add_playground() {
let inputs = [
("<code class=\"language-rust\">x()</code>",
"<pre class=\"playground\"><code class=\"language-rust\"><span class=\"boring\">#![allow(unused)]\n</span><span class=\"boring\">fn main() {\n</span>x()\n<span class=\"boring\">}\n</span></code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust\"><span class=\"boring\">#![allow(unused)]\n</span><span class=\"boring\">fn main() {\n</span>x()\n<span class=\"boring\">}</span></code></pre>"),
("<code class=\"language-rust\">fn main() {}</code>",
"<pre class=\"playground\"><code class=\"language-rust\">fn main() {}\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust\">fn main() {}</code></pre>"),
("<code class=\"language-rust editable\">let s = \"foo\n # bar\n\";</code>",
"<pre class=\"playground\"><code class=\"language-rust editable\">let s = \"foo\n<span class=\"boring\"> bar\n</span>\";\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust editable\">let s = \"foo\n<span class=\"boring\"> bar\n</span>\";</code></pre>"),
("<code class=\"language-rust editable\">let s = \"foo\n ## bar\n\";</code>",
"<pre class=\"playground\"><code class=\"language-rust editable\">let s = \"foo\n # bar\n\";\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust editable\">let s = \"foo\n # bar\n\";</code></pre>"),
("<code class=\"language-rust editable\">let s = \"foo\n # bar\n#\n\";</code>",
"<pre class=\"playground\"><code class=\"language-rust editable\">let s = \"foo\n<span class=\"boring\"> bar\n</span><span class=\"boring\">\n</span>\";\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust editable\">let s = \"foo\n<span class=\"boring\"> bar\n</span><span class=\"boring\">\n</span>\";</code></pre>"),
("<code class=\"language-rust ignore\">let s = \"foo\n # bar\n\";</code>",
"<code class=\"language-rust ignore\">let s = \"foo\n<span class=\"boring\"> bar\n</span>\";\n</code>"),
"<code class=\"language-rust ignore\">let s = \"foo\n<span class=\"boring\"> bar\n</span>\";</code>"),
("<code class=\"language-rust editable\">#![no_std]\nlet s = \"foo\";\n #[some_attr]</code>",
"<pre class=\"playground\"><code class=\"language-rust editable\">#![no_std]\nlet s = \"foo\";\n #[some_attr]\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust editable\">#![no_std]\nlet s = \"foo\";\n #[some_attr]</code></pre>"),
];
for (src, should_be) in &inputs {
let got = add_playground_pre(
Expand All @@ -1034,13 +1037,13 @@ mod tests {
fn add_playground_edition2015() {
let inputs = [
("<code class=\"language-rust\">x()</code>",
"<pre class=\"playground\"><code class=\"language-rust edition2015\"><span class=\"boring\">#![allow(unused)]\n</span><span class=\"boring\">fn main() {\n</span>x()\n<span class=\"boring\">}\n</span></code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust edition2015\"><span class=\"boring\">#![allow(unused)]\n</span><span class=\"boring\">fn main() {\n</span>x()\n<span class=\"boring\">}</span></code></pre>"),
("<code class=\"language-rust\">fn main() {}</code>",
"<pre class=\"playground\"><code class=\"language-rust edition2015\">fn main() {}\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust edition2015\">fn main() {}</code></pre>"),
("<code class=\"language-rust edition2015\">fn main() {}</code>",
"<pre class=\"playground\"><code class=\"language-rust edition2015\">fn main() {}\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust edition2015\">fn main() {}</code></pre>"),
("<code class=\"language-rust edition2018\">fn main() {}</code>",
"<pre class=\"playground\"><code class=\"language-rust edition2018\">fn main() {}\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust edition2018\">fn main() {}</code></pre>"),
];
for (src, should_be) in &inputs {
let got = add_playground_pre(
Expand All @@ -1058,13 +1061,13 @@ mod tests {
fn add_playground_edition2018() {
let inputs = [
("<code class=\"language-rust\">x()</code>",
"<pre class=\"playground\"><code class=\"language-rust edition2018\"><span class=\"boring\">#![allow(unused)]\n</span><span class=\"boring\">fn main() {\n</span>x()\n<span class=\"boring\">}\n</span></code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust edition2018\"><span class=\"boring\">#![allow(unused)]\n</span><span class=\"boring\">fn main() {\n</span>x()\n<span class=\"boring\">}</span></code></pre>"),
("<code class=\"language-rust\">fn main() {}</code>",
"<pre class=\"playground\"><code class=\"language-rust edition2018\">fn main() {}\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust edition2018\">fn main() {}</code></pre>"),
("<code class=\"language-rust edition2015\">fn main() {}</code>",
"<pre class=\"playground\"><code class=\"language-rust edition2015\">fn main() {}\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust edition2015\">fn main() {}</code></pre>"),
("<code class=\"language-rust edition2018\">fn main() {}</code>",
"<pre class=\"playground\"><code class=\"language-rust edition2018\">fn main() {}\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust edition2018\">fn main() {}</code></pre>"),
];
for (src, should_be) in &inputs {
let got = add_playground_pre(
Expand All @@ -1082,13 +1085,13 @@ mod tests {
fn add_playground_edition2021() {
let inputs = [
("<code class=\"language-rust\">x()</code>",
"<pre class=\"playground\"><code class=\"language-rust edition2021\"><span class=\"boring\">#![allow(unused)]\n</span><span class=\"boring\">fn main() {\n</span>x()\n<span class=\"boring\">}\n</span></code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust edition2021\"><span class=\"boring\">#![allow(unused)]\n</span><span class=\"boring\">fn main() {\n</span>x()\n<span class=\"boring\">}</span></code></pre>"),
("<code class=\"language-rust\">fn main() {}</code>",
"<pre class=\"playground\"><code class=\"language-rust edition2021\">fn main() {}\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust edition2021\">fn main() {}</code></pre>"),
("<code class=\"language-rust edition2015\">fn main() {}</code>",
"<pre class=\"playground\"><code class=\"language-rust edition2015\">fn main() {}\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust edition2015\">fn main() {}</code></pre>"),
("<code class=\"language-rust edition2018\">fn main() {}</code>",
"<pre class=\"playground\"><code class=\"language-rust edition2018\">fn main() {}\n</code></pre>"),
"<pre class=\"playground\"><code class=\"language-rust edition2018\">fn main() {}</code></pre>"),
];
for (src, should_be) in &inputs {
let got = add_playground_pre(
Expand Down