Add markdown filter

1 files changed, 41 insertions, 0 deletions

diff --git a/askama_shared/src/generator.rs b/askama_shared/src/generator.rs
index 63a0154..c3beb88 100644
--- a/askama_shared/src/generator.rs
+++ b/askama_shared/src/generator.rs
@@ -1097,6 +1097,45 @@ impl<'a, S: std::hash::BuildHasher> Generator<'a, S> {
         DisplayWrap::Unwrapped
     }
 
+    #[cfg(not(feature = "markdown"))]
+    fn _visit_markdown_filter(
+        &mut self,
+        _buf: &mut Buffer,
+        _args: &[Expr<'_>],
+    ) -> Result<DisplayWrap, CompileError> {
+        Err("the `markdown` filter requires the `markdown` feature to be enabled".into())
+    }
+
+    #[cfg(feature = "markdown")]
+    fn _visit_markdown_filter(
+        &mut self,
+        buf: &mut Buffer,
+        args: &[Expr<'_>],
+    ) -> Result<DisplayWrap, CompileError> {
+        let (md, options) = match args {
+            [md] => (md, None),
+            [md, options] => (md, Some(options)),
+            _ => return Err("markdown filter expects no more than one option argument".into()),
+        };
+
+        buf.write(&format!(
+            "::askama::filters::markdown({}, ",
+            self.input.escaper
+        ));
+        self.visit_expr(buf, md)?;
+        match options {
+            Some(options) => {
+                buf.write(", ::core::option::Option::Some(");
+                self.visit_expr(buf, options)?;
+                buf.write(")");
+            }
+            None => buf.write(", ::core::option::Option::None"),
+        }
+        buf.write(")?");
+
+        Ok(DisplayWrap::Wrapped)
+    }
+
     fn visit_filter(
         &mut self,
         buf: &mut Buffer,
@@ -1115,6 +1154,8 @@ impl<'a, S: std::hash::BuildHasher> Generator<'a, S> {
         } else if name == "join" {
             self._visit_join_filter(buf, args)?;
             return Ok(DisplayWrap::Unwrapped);
+        } else if name == "markdown" {
+            return self._visit_markdown_filter(buf, args);
         }
 
         if name == "tojson" {