docgen: Support pikchr diagrams

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>

1 files changed, 18 insertions, 1 deletions

diff --git a/src/typeset.rs b/src/typeset.rs
index 40cbef6..2904b6a 100644
--- a/src/typeset.rs
+++ b/src/typeset.rs
@@ -4,7 +4,7 @@ use crate::PartialStep;
 use crate::ScenarioStep;
 use crate::StepKind;
 use crate::SubplotError;
-use crate::{DotMarkup, GraphMarkup, PlantumlMarkup};
+use crate::{DotMarkup, GraphMarkup, PikchrMarkup, PlantumlMarkup};
 
 use pandoc_ast::Attr;
 use pandoc_ast::Block;
@@ -133,6 +133,23 @@ pub fn link_as_note(attr: Attr, text: Vec<Inline>, target: Target) -> Inline {
     Inline::Span(attr, text)
 }
 
+/// Take a pikchr graph, render it as SVG, and return an AST block element.
+///
+/// The `Block` will contain the SVG data.  This allows the graph to be
+/// rendered without referencing external entities.
+///
+/// If the code block which contained the pikchr contains other classes, they
+/// can be added to the SVG for use in later typesetting etc.
+pub fn pikchr_to_block(pikchr: &str, class: Option<&str>) -> Block {
+    match PikchrMarkup::new(pikchr, class).as_svg() {
+        Ok(svg) => typeset_svg(svg),
+        Err(err) => {
+            eprintln!("pikchr render failed: {}", err);
+            error(err)
+        }
+    }
+}
+
 // Take a dot graph, render it as SVG, and return an AST Block
 // element. The Block will contain the SVG data. This allows the graph
 // to be rendered without referending external entities.