mirror of
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* Fixes #1884 - Switches markdown libraries and creates a custom rule to manage spoiler blocks * Add tests to cover invalid spoiler input * Consolidate tests, add comments * Make immutable, static instance of markdown parser --------- Co-authored-by: Nutomic <me@nutomic.com>
This commit is contained in:
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||||
"thiserror",
|
||||
"walkdir",
|
||||
"yaml-rust",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tap"
|
||||
version = "1.0.1"
|
||||
|
@ -5771,12 +5924,6 @@ dependencies = [
|
|||
"unchecked-index",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "typed-arena"
|
||||
version = "1.7.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "a9b2228007eba4120145f785df0f6c92ea538f5a3635a612ecf4e334c8c1446d"
|
||||
|
||||
[[package]]
|
||||
name = "typed-arena"
|
||||
version = "2.0.2"
|
||||
|
@ -5827,6 +5974,12 @@ version = "0.3.13"
|
|||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "92888ba5573ff080736b3648696b70cafad7d250551175acbaa4e0385b3e1460"
|
||||
|
||||
[[package]]
|
||||
name = "unicode-general-category"
|
||||
version = "0.6.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2281c8c1d221438e373249e065ca4989c4c36952c211ff21a0ee91c44a3869e7"
|
||||
|
||||
[[package]]
|
||||
name = "unicode-id"
|
||||
version = "0.3.3"
|
||||
|
@ -5861,10 +6014,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
|
|||
checksum = "c0edd1e5b14653f783770bce4a4dabb4a5108a5370a5f5d8cfe8710c361f6c8b"
|
||||
|
||||
[[package]]
|
||||
name = "unicode_categories"
|
||||
version = "0.1.1"
|
||||
name = "unicode-xid"
|
||||
version = "0.2.4"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "39ec24b3121d976906ece63c9daad25b85969647682eee313cb5779fdd69e14e"
|
||||
checksum = "f962df74c8c05a667b5ee8bcf162993134c104e96440b663c8daa176dc772d8c"
|
||||
|
||||
[[package]]
|
||||
name = "unreachable"
|
||||
|
@ -5905,6 +6058,12 @@ version = "0.7.6"
|
|||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "09cc8ee72d2a9becf2f2febe0205bbed8fc6615b7cb429ad062dc7b7ddd036a9"
|
||||
|
||||
[[package]]
|
||||
name = "utf8-width"
|
||||
version = "0.1.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5190c9442dcdaf0ddd50f37420417d219ae5261bbf5db120d0f9bab996c9cba1"
|
||||
|
||||
[[package]]
|
||||
name = "uuid"
|
||||
version = "1.2.1"
|
||||
|
@ -6303,15 +6462,6 @@ version = "0.2.0"
|
|||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "85e60b0d1b5f99db2556934e21937020776a5d31520bf169e851ac44e6420214"
|
||||
|
||||
[[package]]
|
||||
name = "xdg"
|
||||
version = "2.4.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0c4583db5cbd4c4c0303df2d15af80f0539db703fa1c68802d4cbbd2dd0f88f6"
|
||||
dependencies = [
|
||||
"dirs",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "xml5ever"
|
||||
version = "0.16.2"
|
||||
|
|
|
@ -43,7 +43,7 @@ deser-hjson = "1.0.2"
|
|||
smart-default = "0.6.0"
|
||||
jsonwebtoken = "8.1.1"
|
||||
lettre = "0.10.1"
|
||||
comrak = { version = "0.14.0", default-features = false }
|
||||
markdown-it = "0.5.0"
|
||||
totp-rs = { version = "4.2.0", features = ["gen_secret", "otpauth"] }
|
||||
|
||||
[dev-dependencies]
|
||||
|
|
|
@ -1,3 +1,83 @@
|
|||
use markdown_it::MarkdownIt;
|
||||
use once_cell::sync::Lazy;
|
||||
|
||||
mod spoiler_rule;
|
||||
|
||||
static MARKDOWN_PARSER: Lazy<MarkdownIt> = Lazy::new(|| {
|
||||
let mut parser = MarkdownIt::new();
|
||||
markdown_it::plugins::cmark::add(&mut parser);
|
||||
markdown_it::plugins::extra::add(&mut parser);
|
||||
spoiler_rule::add(&mut parser);
|
||||
|
||||
parser
|
||||
});
|
||||
|
||||
pub fn markdown_to_html(text: &str) -> String {
|
||||
comrak::markdown_to_html(text, &comrak::ComrakOptions::default())
|
||||
MARKDOWN_PARSER.parse(text).xrender()
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use crate::utils::markdown::markdown_to_html;
|
||||
|
||||
#[test]
|
||||
fn test_basic_markdown() {
|
||||
let tests: Vec<_> = vec![
|
||||
(
|
||||
"headings",
|
||||
"# h1\n## h2\n### h3\n#### h4\n##### h5\n###### h6",
|
||||
"<h1>h1</h1>\n<h2>h2</h2>\n<h3>h3</h3>\n<h4>h4</h4>\n<h5>h5</h5>\n<h6>h6</h6>\n"
|
||||
),
|
||||
(
|
||||
"line breaks",
|
||||
"First\rSecond",
|
||||
"<p>First\nSecond</p>\n"),
|
||||
(
|
||||
"emphasis",
|
||||
"__bold__ **bold** *italic* ***bold+italic***",
|
||||
"<p><strong>bold</strong> <strong>bold</strong> <em>italic</em> <em><strong>bold+italic</strong></em></p>\n"
|
||||
),
|
||||
(
|
||||
"blockquotes",
|
||||
"> #### Hello\n > \n > - Hola\n > - 안영 \n>> Goodbye\n",
|
||||
"<blockquote>\n<h4>Hello</h4>\n<ul>\n<li>Hola</li>\n<li>안영</li>\n</ul>\n<blockquote>\n<p>Goodbye</p>\n</blockquote>\n</blockquote>\n"
|
||||
),
|
||||
(
|
||||
"lists (ordered, unordered)",
|
||||
"1. pen\n2. apple\n3. apple pen\n- pen\n- pineapple\n- pineapple pen",
|
||||
"<ol>\n<li>pen</li>\n<li>apple</li>\n<li>apple pen</li>\n</ol>\n<ul>\n<li>pen</li>\n<li>pineapple</li>\n<li>pineapple pen</li>\n</ul>\n"
|
||||
),
|
||||
(
|
||||
"code and code blocks",
|
||||
"this is my amazing `code snippet` and my amazing ```code block```",
|
||||
"<p>this is my amazing <code>code snippet</code> and my amazing <code>code block</code></p>\n"
|
||||
),
|
||||
(
|
||||
"links",
|
||||
"[Lemmy](https://join-lemmy.org/ \"Join Lemmy!\")",
|
||||
"<p><a href=\"https://join-lemmy.org/\" title=\"Join Lemmy!\">Lemmy</a></p>\n"
|
||||
),
|
||||
(
|
||||
"images",
|
||||
"![My linked image](https://image.com \"image alt text\")",
|
||||
"<p><img src=\"https://image.com\" alt=\"My linked image\" title=\"image alt text\" /></p>\n"
|
||||
),
|
||||
// Ensure any custom plugins are added to 'MARKDOWN_PARSER' implementation.
|
||||
(
|
||||
"basic spoiler",
|
||||
"::: spoiler click to see more\nhow spicy!\n:::\n",
|
||||
"<details><summary>click to see more</summary><p>how spicy!\n</p></details>\n"
|
||||
),
|
||||
];
|
||||
|
||||
tests.iter().for_each(|&(msg, input, expected)| {
|
||||
let result = markdown_to_html(input);
|
||||
|
||||
assert_eq!(
|
||||
result, expected,
|
||||
"Testing {}, with original input '{}'",
|
||||
msg, input
|
||||
);
|
||||
});
|
||||
}
|
||||
}
|
||||
|
|
200
crates/utils/src/utils/markdown/spoiler_rule.rs
Normal file
200
crates/utils/src/utils/markdown/spoiler_rule.rs
Normal file
|
@ -0,0 +1,200 @@
|
|||
// Custom Markdown plugin to manage spoilers.
|
||||
//
|
||||
// Matches the capability described in Lemmy UI:
|
||||
// https://github.com/LemmyNet/lemmy-ui/blob/main/src/shared/utils.ts#L159
|
||||
// that is based off of:
|
||||
// https://github.com/markdown-it/markdown-it-container/tree/master#example
|
||||
//
|
||||
// FORMAT:
|
||||
// Input Markdown: ::: spoiler VISIBLE_TEXT\nHIDDEN_SPOILER\n:::\n
|
||||
// Output HTML: <details><summary>VISIBLE_TEXT</summary><p>nHIDDEN_SPOILER</p></details>
|
||||
//
|
||||
// Anatomy of a spoiler:
|
||||
// keyword
|
||||
// ^
|
||||
// ::: spoiler VISIBLE_HINT
|
||||
// ^ ^
|
||||
// begin fence visible text
|
||||
//
|
||||
// HIDDEN_SPOILER
|
||||
// ^
|
||||
// hidden text
|
||||
//
|
||||
// :::
|
||||
// ^
|
||||
// end fence
|
||||
|
||||
use markdown_it::{
|
||||
parser::{
|
||||
block::{BlockRule, BlockState},
|
||||
inline::InlineRoot,
|
||||
},
|
||||
MarkdownIt,
|
||||
Node,
|
||||
NodeValue,
|
||||
Renderer,
|
||||
};
|
||||
use once_cell::sync::Lazy;
|
||||
use regex::Regex;
|
||||
|
||||
#[derive(Debug)]
|
||||
struct SpoilerBlock {
|
||||
visible_text: String,
|
||||
}
|
||||
|
||||
const SPOILER_PREFIX: &str = "::: spoiler ";
|
||||
const SPOILER_SUFFIX: &str = ":::";
|
||||
const SPOILER_SUFFIX_NEWLINE: &str = ":::\n";
|
||||
|
||||
static SPOILER_REGEX: Lazy<Regex> =
|
||||
Lazy::new(|| Regex::new(r"^::: spoiler .*$").expect("compile spoiler markdown regex."));
|
||||
|
||||
impl NodeValue for SpoilerBlock {
|
||||
// Formats any node marked as a 'SpoilerBlock' into HTML.
|
||||
// See the SpoilerBlockScanner#run implementation to see how these nodes get added to the tree.
|
||||
fn render(&self, node: &Node, fmt: &mut dyn Renderer) {
|
||||
fmt.cr();
|
||||
fmt.open("details", &node.attrs);
|
||||
fmt.open("summary", &[]);
|
||||
// Not allowing special styling to the visible text to keep it simple.
|
||||
// If allowed, would need to parse the child nodes to assign to visible vs hidden text sections.
|
||||
fmt.text(&self.visible_text);
|
||||
fmt.close("summary");
|
||||
fmt.open("p", &[]);
|
||||
fmt.contents(&node.children);
|
||||
fmt.close("p");
|
||||
fmt.close("details");
|
||||
fmt.cr();
|
||||
}
|
||||
}
|
||||
|
||||
struct SpoilerBlockScanner;
|
||||
|
||||
impl BlockRule for SpoilerBlockScanner {
|
||||
// Invoked on every line in the provided Markdown text to check if the BlockRule applies.
|
||||
//
|
||||
// NOTE: This does NOT support nested spoilers at this time.
|
||||
fn run(state: &mut BlockState) -> Option<(Node, usize)> {
|
||||
let first_line: &str = state.get_line(state.line).trim();
|
||||
|
||||
// 1. Check if the first line contains the spoiler syntax...
|
||||
if !SPOILER_REGEX.is_match(first_line) {
|
||||
return None;
|
||||
}
|
||||
|
||||
let begin_spoiler_line_idx: usize = state.line + 1;
|
||||
let mut end_fence_line_idx: usize = begin_spoiler_line_idx;
|
||||
let mut has_end_fence: bool = false;
|
||||
|
||||
// 2. Search for the end of the spoiler and find the index of the last line of the spoiler.
|
||||
// There could potentially be multiple lines between the beginning and end of the block.
|
||||
//
|
||||
// Block ends with a line with ':::' or ':::\n'; it must be isolated from other markdown.
|
||||
while end_fence_line_idx < state.line_max && !has_end_fence {
|
||||
let next_line: &str = state.get_line(end_fence_line_idx).trim();
|
||||
|
||||
if next_line.eq(SPOILER_SUFFIX) || next_line.eq(SPOILER_SUFFIX_NEWLINE) {
|
||||
has_end_fence = true;
|
||||
break;
|
||||
}
|
||||
|
||||
end_fence_line_idx += 1;
|
||||
}
|
||||
|
||||
// 3. If available, construct and return the spoiler node to add to the tree.
|
||||
if has_end_fence {
|
||||
let (spoiler_content, mapping) = state.get_lines(
|
||||
begin_spoiler_line_idx,
|
||||
end_fence_line_idx,
|
||||
state.blk_indent,
|
||||
true,
|
||||
);
|
||||
|
||||
let mut node = Node::new(SpoilerBlock {
|
||||
visible_text: String::from(first_line.replace(SPOILER_PREFIX, "").trim()),
|
||||
});
|
||||
|
||||
// Add the spoiler content as children; marking as a child tells the tree to process the
|
||||
// node again, which means other Markdown syntax (ex: emphasis, links) can be rendered.
|
||||
node
|
||||
.children
|
||||
.push(Node::new(InlineRoot::new(spoiler_content, mapping)));
|
||||
|
||||
// NOTE: Not using begin_spoiler_line_idx here because of incorrect results when
|
||||
// state.line == 0 (subtracts an idx) vs the expected correct result (adds an idx).
|
||||
Some((node, end_fence_line_idx - state.line + 1))
|
||||
} else {
|
||||
None
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub fn add(markdown_parser: &mut MarkdownIt) {
|
||||
markdown_parser.block.add_rule::<SpoilerBlockScanner>();
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use crate::utils::markdown::spoiler_rule::add;
|
||||
use markdown_it::MarkdownIt;
|
||||
|
||||
#[test]
|
||||
fn test_spoiler_markdown() {
|
||||
let tests: Vec<_> = vec![
|
||||
(
|
||||
"invalid spoiler",
|
||||
"::: spoiler click to see more\nbut I never finished",
|
||||
"<p>::: spoiler click to see more\nbut I never finished</p>\n",
|
||||
),
|
||||
(
|
||||
"another invalid spoiler",
|
||||
"::: spoiler\nnever added the lead in\n:::",
|
||||
"<p>::: spoiler\nnever added the lead in\n:::</p>\n",
|
||||
),
|
||||
(
|
||||
"basic spoiler, but no newline at the end",
|
||||
"::: spoiler click to see more\nhow spicy!\n:::",
|
||||
"<details><summary>click to see more</summary><p>how spicy!\n</p></details>\n"
|
||||
),
|
||||
(
|
||||
"basic spoiler with a newline at the end",
|
||||
"::: spoiler click to see more\nhow spicy!\n:::\n",
|
||||
"<details><summary>click to see more</summary><p>how spicy!\n</p></details>\n"
|
||||
),
|
||||
(
|
||||
"spoiler with extra markdown on the call to action (no extra parsing)",
|
||||
"::: spoiler _click to see more_\nhow spicy!\n:::\n",
|
||||
"<details><summary>_click to see more_</summary><p>how spicy!\n</p></details>\n"
|
||||
),
|
||||
(
|
||||
"spoiler with extra markdown in the fenced spoiler block",
|
||||
"::: spoiler click to see more\n**how spicy!**\n*i have many lines*\n:::\n",
|
||||
"<details><summary>click to see more</summary><p><strong>how spicy!</strong>\n<em>i have many lines</em>\n</p></details>\n"
|
||||
),
|
||||
(
|
||||
"spoiler mixed with other content",
|
||||
"hey you\npsst, wanna hear a secret?\n::: spoiler lean in and i'll tell you\n**you are breathtaking!**\n:::\nwhatcha think about that?",
|
||||
"<p>hey you\npsst, wanna hear a secret?</p>\n<details><summary>lean in and i'll tell you</summary><p><strong>you are breathtaking!</strong>\n</p></details>\n<p>whatcha think about that?</p>\n"
|
||||
),
|
||||
(
|
||||
"spoiler mixed with indented content",
|
||||
"- did you know that\n::: spoiler the call was\n***coming from inside the house!***\n:::\n - crazy, right?",
|
||||
"<ul>\n<li>did you know that</li>\n</ul>\n<details><summary>the call was</summary><p><em><strong>coming from inside the house!</strong></em>\n</p></details>\n<ul>\n<li>crazy, right?</li>\n</ul>\n"
|
||||
)
|
||||
];
|
||||
|
||||
tests.iter().for_each(|&(msg, input, expected)| {
|
||||
let md = &mut MarkdownIt::new();
|
||||
markdown_it::plugins::cmark::add(md);
|
||||
add(md);
|
||||
|
||||
assert_eq!(
|
||||
md.parse(input).xrender(),
|
||||
expected,
|
||||
"Testing {}, with original input '{}'",
|
||||
msg,
|
||||
input
|
||||
);
|
||||
});
|
||||
}
|
||||
}
|
Loading…
Reference in a new issue