Pass language to raw show rule

src/library/math/mod.rs

@@ -40,7 +40,7 @@ impl Show for MathNode {
         Self { formula: self.formula.clone(), ..*self }.pack()
     }
 
-    fn encode(&self) -> Dict {
+    fn encode(&self, _: StyleChain) -> Dict {
         dict! {
             "formula" => Value::Str(self.formula.clone()),
             "display" => Value::Bool(self.display)

src/library/structure/heading.rs

@@ -68,7 +68,7 @@ impl Show for HeadingNode {
         Self { body: self.body.unguard(sel), ..*self }.pack()
     }
 
-    fn encode(&self) -> Dict {
+    fn encode(&self, _: StyleChain) -> Dict {
         dict! {
             "level" => Value::Int(self.level.get() as i64),
             "body" => Value::Content(self.body.clone()),

src/library/structure/list.rs

@@ -86,7 +86,7 @@ impl<const L: ListKind> Show for ListNode<L> {
         .pack()
     }
 
-    fn encode(&self) -> Dict {
+    fn encode(&self, _: StyleChain) -> Dict {
         dict! {
             "start" => Value::Int(self.start as i64),
             "tight" => Value::Bool(self.tight),

src/library/structure/table.rs

@@ -60,7 +60,7 @@ impl Show for TableNode {
         .pack()
     }
 
-    fn encode(&self) -> Dict {
+    fn encode(&self, _: StyleChain) -> Dict {
         dict! {
             "cells" => Value::Array(
                 self.cells

src/library/text/deco.rs

@@ -45,7 +45,7 @@ impl<const L: DecoLine> Show for DecoNode<L> {
         Self(self.0.unguard(sel)).pack()
     }
 
-    fn encode(&self) -> Dict {
+    fn encode(&self, _: StyleChain) -> Dict {
         dict! { "body" => Value::Content(self.0.clone()) }
     }
 

src/library/text/link.rs

@@ -36,7 +36,7 @@ impl Show for LinkNode {
         .pack()
     }
 
-    fn encode(&self) -> Dict {
+    fn encode(&self, _: StyleChain) -> Dict {
         dict! {
             "url" => Value::Str(self.url.clone()),
             "body" => match &self.body {

src/library/text/mod.rs

@@ -524,7 +524,7 @@ impl Show for StrongNode {
         Self(self.0.unguard(sel)).pack()
     }
 
-    fn encode(&self) -> Dict {
+    fn encode(&self, _: StyleChain) -> Dict {
         dict! { "body" => Value::Content(self.0.clone()) }
     }
 
@@ -549,7 +549,7 @@ impl Show for EmphNode {
         Self(self.0.unguard(sel)).pack()
     }
 
-    fn encode(&self) -> Dict {
+    fn encode(&self, _: StyleChain) -> Dict {
         dict! { "body" => Value::Content(self.0.clone()) }
     }
 

src/library/text/raw.rs

@@ -52,10 +52,14 @@ impl Show for RawNode {
         Self { text: self.text.clone(), ..*self }.pack()
     }
 
-    fn encode(&self) -> Dict {
+    fn encode(&self, styles: StyleChain) -> Dict {
         dict! {
-            "text" => Value::Str(self.text.clone()),
-            "block" => Value::Bool(self.block)
+           "text" => Value::Str(self.text.clone()),
+           "block" => Value::Bool(self.block),
+           "lang" => match styles.get(Self::LANG) {
+               Some(lang) => Value::Str(lang.clone()),
+               None => Value::None,
+           },
         }
     }
 

src/model/recipe.rs

@@ -1,6 +1,6 @@
 use std::fmt::{self, Debug, Formatter};
 
-use super::{Content, Interruption, NodeId, Show, ShowNode, StyleEntry};
+use super::{Content, Interruption, NodeId, Show, ShowNode, StyleChain, StyleEntry};
 use crate::diag::{At, TypResult};
 use crate::eval::{Args, Func, Regex, Value};
 use crate::library::structure::{EnumNode, ListNode};
@@ -32,6 +32,7 @@ impl Recipe {
     pub fn apply(
         &self,
         ctx: &mut Context,
+        styles: StyleChain,
         sel: Selector,
         target: Target,
     ) -> TypResult<Option<Content>> {
@@ -39,7 +40,7 @@ impl Recipe {
             (Target::Node(node), &Pattern::Node(id)) if node.id() == id => {
                 let node = node.unguard(sel);
                 self.call(ctx, || {
-                    let dict = node.encode();
+                    let dict = node.encode(styles);
                     Value::Content(Content::Show(node, Some(dict)))
                 })?
             }

src/model/show.rs

@@ -14,7 +14,7 @@ pub trait Show: 'static {
     fn unguard(&self, sel: Selector) -> ShowNode;
 
     /// Encode this node into a dictionary.
-    fn encode(&self) -> Dict;
+    fn encode(&self, styles: StyleChain) -> Dict;
 
     /// The base recipe for this node that is executed if there is no
     /// user-defined show rule.
@@ -70,8 +70,8 @@ impl Show for ShowNode {
         self.0.unguard(sel)
     }
 
-    fn encode(&self) -> Dict {
-        self.0.encode()
+    fn encode(&self, styles: StyleChain) -> Dict {
+        self.0.encode(styles)
     }
 
     fn realize(&self, ctx: &mut Context, styles: StyleChain) -> TypResult<Content> {

src/model/styles.rs

@@ -306,7 +306,7 @@ impl<'a> StyleChain<'a> {
                     let sel = Selector::Nth(n);
                     if self.guarded(sel) {
                         guarded = true;
-                    } else if let Some(content) = recipe.apply(ctx, sel, target)? {
+                    } else if let Some(content) = recipe.apply(ctx, self, sel, target)? {
                         realized = Some(content);
                         break;
                     }