fix(md): remove the leading space of the first paragraph in note card

Author: yin1999

crates/rari-md/src/lib.rs

@@ -202,6 +202,16 @@ mod test {
         Ok(())
     }
 
+    #[test]
+    fn note_zh_locale() -> Result<(), anyhow::Error> {
+        let out = m2h("> [!NOTE]\n> This paragraph should have no leading spaces", Locale::ZhCn)?;
+        assert_eq!(
+            out,
+            "<div class=\"notecard note\" data-add-note data-sourcepos=\"1:1-2:46\">\n<p data-sourcepos=\"1:3-2:46\">This paragraph should have no leading spaces</p>\n</div>\n"
+        );
+        Ok(())
+    }
+
     #[test]
     fn escape_hrefs() -> Result<(), anyhow::Error> {
         fn eh(s: &str) -> Result<String, anyhow::Error> {

crates/rari-md/src/node_card.rs

@@ -89,6 +89,7 @@ pub(crate) fn is_callout<'a>(block_quote: &'a AstNode<'a>, locale: Locale) -> Op
                 }
                 if text.starts_with(NoteCard::Warning.new_prefix()) {
                     if text.trim() == NoteCard::Warning.new_prefix() {
+                        remove_leading_space_if_zh_locale(marker, locale);
                         marker.detach();
                     } else if let Some(tail) = text.strip_prefix(NoteCard::Warning.new_prefix()) {
                         data.value = NodeValue::Text(tail.trim().to_string());
@@ -97,6 +98,7 @@ pub(crate) fn is_callout<'a>(block_quote: &'a AstNode<'a>, locale: Locale) -> Op
                 }
                 if text.starts_with(NoteCard::Note.new_prefix()) {
                     if text.trim() == NoteCard::Note.new_prefix() {
+                        remove_leading_space_if_zh_locale(marker, locale);
                         marker.detach();
                     } else if let Some(tail) = text.strip_prefix(NoteCard::Note.new_prefix()) {
                         data.value = NodeValue::Text(tail.trim().to_string());
@@ -109,6 +111,23 @@ pub(crate) fn is_callout<'a>(block_quote: &'a AstNode<'a>, locale: Locale) -> Op
     None
 }
 
+fn remove_leading_space_if_zh_locale(node: &AstNode, locale: Locale) {
+    if !matches!(locale, Locale::ZhCn | Locale::ZhTw) {
+        return;
+    }
+    // If the next sibling is a soft break, remove it to avoid extra space. Example raw markdown:
+    //
+    // ```
+    // > [!NOTE]
+    // > This is a note.
+    // ```
+    if let Some(next_sibling) = node.next_sibling() {
+        if matches!(next_sibling.data.borrow().value, NodeValue::SoftBreak) {
+            next_sibling.detach();
+        }
+    }
+}
+
 /// Returns the default title for an alert type
 pub fn alert_type_default_title(alert_type: &AlertType) -> String {
     match *alert_type {