From f67606cbdb43ea6e46372feb80c49e91db05725b Mon Sep 17 00:00:00 2001
From: Ben Bridle <ben@derelict.engineering>
Date: Sun, 19 Jan 2025 19:58:14 +1300
Subject: Implement Math block
A math block is a line that begins and ends with a pair of dollar-signs.
---
src/block.rs | 1 +
src/lib.rs | 18 +++++++++++++++---
2 files changed, 16 insertions(+), 3 deletions(-)
(limited to 'src')
diff --git a/src/block.rs b/src/block.rs
index 1d6ac60..3ae39bf 100644
--- a/src/block.rs
+++ b/src/block.rs
@@ -13,6 +13,7 @@ pub enum Block {
Paragraph(Line),
List(Vec<Line>),
Note(Vec<Line>),
+ Math(String),
Table(Table),
Break,
Embed { label: String, path: String },
diff --git a/src/lib.rs b/src/lib.rs
index e75221c..ac00e3b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -108,9 +108,12 @@ impl MarkdownDocument {
Block::Heading { level, line: Line::from_str(&line) }),
BlockLine::Break => blocks.push(Block::Break),
BlockLine::BlankLine => (),
- BlockLine::Paragraph(line) => match parse_embed(&line) {
- Some(embed) => blocks.push(embed),
- None => blocks.push(Block::Paragraph(Line::from_str(&line))),
+ BlockLine::Paragraph(line) => if let Some(embed) = parse_embed(&line) {
+ blocks.push(embed)
+ } else if let Some(math) = parse_math(&line) {
+ blocks.push(math)
+ } else {
+ blocks.push(Block::Paragraph(Line::from_str(&line)))
}
}
}
@@ -157,3 +160,12 @@ fn parse_embed(line: &str) -> Option<Block> {
return None;
}
+fn parse_math(line: &str) -> Option<Block> {
+ let line = line.trim();
+ if let Some(stripped) = line.strip_prefix("$$") {
+ if let Some(stripped) = stripped.strip_suffix("$$") {
+ return Some(Block::Math(stripped.trim().to_string()))
+ }
+ }
+ return None;
+}
--
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