quarto-dev · cscheid · Sep 6, 2025 · Sep 6, 2025
diff --git a/crates/quarto-markdown-pandoc/src/filters.rs b/crates/quarto-markdown-pandoc/src/filters.rs
@@ -53,6 +53,10 @@ pub struct Filter<'a> {
     pub shortcode: InlineFilterField<'a, pandoc::Shortcode>,
     pub note_reference: InlineFilterField<'a, pandoc::NoteReference>,
     pub attr: InlineFilterField<'a, pandoc::Attr>,
+    pub insert: InlineFilterField<'a, pandoc::Insert>,
+    pub delete: InlineFilterField<'a, pandoc::Delete>,
+    pub highlight: InlineFilterField<'a, pandoc::Highlight>,
+    pub edit_comment: InlineFilterField<'a, pandoc::EditComment>,
 
     pub paragraph: BlockFilterField<'a, pandoc::Paragraph>,
     pub plain: BlockFilterField<'a, pandoc::Plain>,
@@ -119,6 +123,11 @@ impl Default for Filter<'static> {
             horizontal_rule: None,
             attr: None,
 
+            insert: None,
+            delete: None,
+            highlight: None,
+            edit_comment: None,
+
             meta: None,
         }
     }
@@ -200,6 +209,10 @@ define_filter_with_methods!(
     shortcode,
     note_reference,
     attr,
+    insert,
+    delete,
+    highlight,
+    edit_comment
 );
 
 define_filter_with_methods!(
@@ -300,7 +313,11 @@ impl_inline_filterable_simple!(
     Quoted,
     Link,
     Image,
-    Span
+    Span,
+    Insert,
+    Delete,
+    Highlight,
+    EditComment
 );
 
 impl InlineFilterableStructure for pandoc::Note {
@@ -617,6 +634,18 @@ pub fn topdown_traverse_inline(inline: Inline, filter: &mut Filter) -> Inlines {
         Inline::Attr(attr) => {
             handle_inline_filter!(Attr, attr, attr, filter)
         }
+        Inline::Insert(ins) => {
+            handle_inline_filter!(Insert, ins, insert, filter)
+        }
+        Inline::Delete(del) => {
+            handle_inline_filter!(Delete, del, delete, filter)
+        }
+        Inline::Highlight(hl) => {
+            handle_inline_filter!(Highlight, hl, highlight, filter)
+        }
+        Inline::EditComment(ec) => {
+            handle_inline_filter!(EditComment, ec, edit_comment, filter)
+        }
     }
 }
 

diff --git a/crates/quarto-markdown-pandoc/src/pandoc/inline.rs b/crates/quarto-markdown-pandoc/src/pandoc/inline.rs
@@ -40,6 +40,12 @@ pub enum Inline {
     // this is used to represent commonmark attributes in the document in places
     // where they are not directly attached to a block, like in headings and tables
     Attr(Attr),
+
+    // CriticMarkup-like extensions
+    Insert(Insert),
+    Delete(Delete),
+    Highlight(Highlight),
+    EditComment(EditComment),
 }
 
 pub type Inlines = Vec<Inline>;
@@ -194,6 +200,26 @@ pub enum CitationMode {
     NormalCitation,
 }
 
+#[derive(Debug, Clone, PartialEq)]
+pub struct Insert {
+    pub content: Inlines,
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct Delete {
+    pub content: Inlines,
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct Highlight {
+    pub content: Inlines,
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct EditComment {
+    pub content: Inlines,
+}
+
 impl_source_location!(Space, LineBreak, SoftBreak);
 
 pub trait AsInline {
@@ -241,7 +267,11 @@ impl_as_inline!(
     Span,
     Shortcode,
     NoteReference,
-    Attr
+    Attr,
+    Insert,
+    Delete,
+    Highlight,
+    EditComment
 );
 
 pub fn is_empty_target(target: &Target) -> bool {

diff --git a/crates/quarto-markdown-pandoc/src/pandoc/mod.rs b/crates/quarto-markdown-pandoc/src/pandoc/mod.rs
@@ -22,9 +22,10 @@ pub use crate::pandoc::block::{
 };
 pub use crate::pandoc::caption::Caption;
 pub use crate::pandoc::inline::{
-    Citation, CitationMode, Cite, Code, Emph, Image, Inline, Inlines, LineBreak, Link, Math,
-    MathType, Note, NoteReference, QuoteType, Quoted, RawInline, SmallCaps, SoftBreak, Space, Span,
-    Str, Strikeout, Strong, Subscript, Superscript, Underline,
+    Citation, CitationMode, Cite, Code, Delete, EditComment, Emph, Highlight, Image, Inline,
+    Inlines, Insert, LineBreak, Link, Math, MathType, Note, NoteReference, QuoteType, Quoted,
+    RawInline, SmallCaps, SoftBreak, Space, Span, Str, Strikeout, Strong, Subscript, Superscript,
+    Underline,
 };
 pub use crate::pandoc::list::{ListAttributes, ListNumberDelim, ListNumberStyle};
 pub use crate::pandoc::pandoc::Pandoc;

diff --git a/crates/quarto-markdown-pandoc/src/pandoc/treesitter.rs b/crates/quarto-markdown-pandoc/src/pandoc/treesitter.rs
@@ -10,9 +10,10 @@ use crate::pandoc::block::{
 };
 use crate::pandoc::caption::Caption;
 use crate::pandoc::inline::{
-    Citation, CitationMode, Cite, Code, Emph, Image, Inline, Inlines, LineBreak, Link, Math,
-    MathType, Note, NoteReference, QuoteType, Quoted, RawInline, SoftBreak, Space, Span, Str,
-    Strikeout, Strong, Subscript, Superscript, Target, is_empty_target,
+    Citation, CitationMode, Cite, Code, Delete, EditComment, Emph, Highlight, Image, Inline,
+    Inlines, Insert, LineBreak, Link, Math, MathType, Note, NoteReference, QuoteType, Quoted,
+    RawInline, SoftBreak, Space, Span, Str, Strikeout, Strong, Subscript, Superscript, Target,
+    is_empty_target,
 };
 
 use crate::pandoc::inline::{make_cite_inline, make_span_inline};
@@ -894,7 +895,11 @@ fn native_visitor<T: Write>(
         | "superscript_delimiter"
         | "subscript_delimiter"
         | "strikeout_delimiter"
-        | "emphasis_delimiter" => {
+        | "emphasis_delimiter"
+        | "insert_delimiter"
+        | "delete_delimiter"
+        | "highlight_delimiter"
+        | "edit_comment_delimiter" => {
             PandocNativeIntermediate::IntermediateUnknown(node_location(node))
         }
         "soft_line_break" => {
@@ -971,6 +976,46 @@ fn native_visitor<T: Write>(
                 content: inlines,
             }))
         }
+        "insert" => {
+            let inlines: Vec<_> = children
+                .into_iter()
+                .filter(|(node, _)| node != "insert_delimiter")
+                .map(native_inline)
+                .collect();
+            PandocNativeIntermediate::IntermediateInline(Inline::Insert(Insert {
+                content: inlines,
+            }))
+        }
+        "delete" => {
+            let inlines: Vec<_> = children
+                .into_iter()
+                .filter(|(node, _)| node != "delete_delimiter")
+                .map(native_inline)
+                .collect();
+            PandocNativeIntermediate::IntermediateInline(Inline::Delete(Delete {
+                content: inlines,
+            }))
+        }
+        "highlight" => {
+            let inlines: Vec<_> = children
+                .into_iter()
+                .filter(|(node, _)| node != "highlight_delimiter")
+                .map(native_inline)
+                .collect();
+            PandocNativeIntermediate::IntermediateInline(Inline::Highlight(Highlight {
+                content: inlines,
+            }))
+        }
+        "edit_comment" => {
+            let inlines: Vec<_> = children
+                .into_iter()
+                .filter(|(node, _)| node != "edit_comment_delimiter")
+                .map(native_inline)
+                .collect();
+            PandocNativeIntermediate::IntermediateInline(Inline::EditComment(EditComment {
+                content: inlines,
+            }))
+        }
 
         "quoted_span" => {
             let mut quote_type = QuoteType::SingleQuote;
@@ -1895,6 +1940,62 @@ fn desugar(doc: Pandoc) -> Result<Pandoc, Vec<String>> {
                     false,
                 )
             })
+            .with_insert(|insert| {
+                let (content, _changed) = trim_inlines(insert.content);
+                FilterResult(
+                    vec![Inline::Span(Span {
+                        attr: (
+                            "".to_string(),
+                            vec!["quarto-insert".to_string()],
+                            HashMap::new(),
+                        ),
+                        content,
+                    })],
+                    true,
+                )
+            })
+            .with_delete(|delete| {
+                let (content, _changed) = trim_inlines(delete.content);
+                FilterResult(
+                    vec![Inline::Span(Span {
+                        attr: (
+                            "".to_string(),
+                            vec!["quarto-delete".to_string()],
+                            HashMap::new(),
+                        ),
+                        content,
+                    })],
+                    true,
+                )
+            })
+            .with_highlight(|highlight| {
+                let (content, _changed) = trim_inlines(highlight.content);
+                FilterResult(
+                    vec![Inline::Span(Span {
+                        attr: (
+                            "".to_string(),
+                            vec!["quarto-highlight".to_string()],
+                            HashMap::new(),
+                        ),
+                        content,
+                    })],
+                    true,
+                )
+            })
+            .with_edit_comment(|edit_comment| {
+                let (content, _changed) = trim_inlines(edit_comment.content);
+                FilterResult(
+                    vec![Inline::Span(Span {
+                        attr: (
+                            "".to_string(),
+                            vec!["quarto-edit-comment".to_string()],
+                            HashMap::new(),
+                        ),
+                        content,
+                    })],
+                    true,
+                )
+            })
             .with_inlines(|inlines| {
                 let mut result = vec![];
                 // states in this state machine:

diff --git a/crates/quarto-markdown-pandoc/src/writers/json.rs b/crates/quarto-markdown-pandoc/src/writers/json.rs
@@ -144,7 +144,13 @@ fn write_inline(inline: &Inline) -> Value {
                 })
             }).collect::<Vec<_>>()
         }),
-        Inline::Shortcode(_) | Inline::NoteReference(_) | Inline::Attr(_) => {
+        Inline::Shortcode(_)
+        | Inline::NoteReference(_)
+        | Inline::Attr(_)
+        | Inline::Insert(_)
+        | Inline::Delete(_)
+        | Inline::Highlight(_)
+        | Inline::EditComment(_) => {
             panic!("Unsupported inline type: {:?}", inline)
         }
     }

diff --git a/crates/quarto-markdown-pandoc/tests/snapshots/013.qmd b/crates/quarto-markdown-pandoc/tests/snapshots/013.qmd
@@ -0,0 +1 @@
+[++insertions with markdown _inside_ them], [--deletions, **likewise**], [!! highlight this part][>> with a comment about the previous highlight].
diff --git a/crates/quarto-markdown-pandoc/tests/snapshots/013.qmd.snapshot b/crates/quarto-markdown-pandoc/tests/snapshots/013.qmd.snapshot
@@ -0,0 +1 @@
+[ Para [Span ( "" , ["quarto-insert"] , [] ) [Str "insertions", Space, Str "with", Space, Str "markdown", Space, Emph [Str "inside"], Space, Str "them"], Str ",", Space, Span ( "" , ["quarto-delete"] , [] ) [Str "deletions,", Space, Strong [Str "likewise"]], Str ",", Space, Span ( "" , ["quarto-highlight"] , [] ) [Str "highlight", Space, Str "this", Space, Str "part"], Span ( "" , ["quarto-edit-comment"] , [] ) [Str "with", Space, Str "a", Space, Str "comment", Space, Str "about", Space, Str "the", Space, Str "previous", Space, Str "highlight"], Str "."] ]
diff --git a/crates/tree-sitter-qmd/tree-sitter-markdown-inline/grammar.js b/crates/tree-sitter-qmd/tree-sitter-markdown-inline/grammar.js
@@ -149,6 +149,30 @@ module.exports = grammar(add_inline_rules({
             alias($._latex_span_close, $.latex_span_delimiter),
         ),
 
+        insert: $ => seq(
+            prec(3, alias(/\[\+\+[ ]*/, $.insert_delimiter)),
+            repeat($._inline_element),
+            prec(3, alias(/[ ]*\]/, $.insert_delimiter)),
+        ),
+
+        delete: $ => seq(
+            prec(3, alias(/\[\-\-[ ]*/, $.delete_delimiter)),
+            repeat($._inline_element),
+            prec(3, alias(/[ ]*\]/, $.delete_delimiter)),
+        ),
+
+        highlight: $ => seq(
+            prec(3, alias(/\[\!\![ ]*/, $.highlight_delimiter)),
+            repeat($._inline_element),
+            prec(3, alias(/[ ]*\]/, $.highlight_delimiter)),
+        ),
+
+        edit_comment: $ => seq(
+            prec(3, alias(/\[>>[ ]*/, $.edit_comment_delimiter)),
+            repeat($._inline_element),
+            prec(3, alias(/[ ]*\]/, $.edit_comment_delimiter)),
+        ),
+
         superscript: $ => seq(
             alias($._superscript_open, $.superscript_delimiter),
             repeat($._inline_element),
@@ -399,6 +423,10 @@ module.exports = grammar(add_inline_rules({
             $.shortcode_escaped,
             $.note_reference,
             $.commonmark_attribute,
+            $.insert,
+            $.delete,
+            $.highlight,
+            $.edit_comment,
 
             alias($._text_base, $.text_base),
             $._unclosed_span,
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		[++insertions with markdown _inside_ them], [--deletions, likewise], [!! highlight this part][>> with a comment about the previous highlight].
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		[ Para [Span ( "" , ["quarto-insert"] , [] ) [Str "insertions", Space, Str "with", Space, Str "markdown", Space, Emph [Str "inside"], Space, Str "them"], Str ",", Space, Span ( "" , ["quarto-delete"] , [] ) [Str "deletions,", Space, Strong [Str "likewise"]], Str ",", Space, Span ( "" , ["quarto-highlight"] , [] ) [Str "highlight", Space, Str "this", Space, Str "part"], Span ( "" , ["quarto-edit-comment"] , [] ) [Str "with", Space, Str "a", Space, Str "comment", Space, Str "about", Space, Str "the", Space, Str "previous", Space, Str "highlight"], Str "."] ]