From 050ef11a962a480a3616fc952961b036e0a2cb7a Mon Sep 17 00:00:00 2001
From: Damien Elmes <gpg@ankiweb.net>
Date: Tue, 25 May 2021 18:41:43 +1000
Subject: [PATCH] pass css and latex svg flag back from rendering op

This could potentially help us avoid having to refetch the notetype
during study in the future, though updates to Note initialization and
the LaTeX handling would be required first.
---
 pylib/anki/template.py             | 12 ++++++++++--
 rslib/backend.proto                |  2 ++
 rslib/src/backend/cardrendering.rs |  2 ++
 rslib/src/notetype/render.rs       |  9 ++++++++-
 4 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/pylib/anki/template.py b/pylib/anki/template.py
index 1854d71e8..816ee376f 100644
--- a/pylib/anki/template.py
+++ b/pylib/anki/template.py
@@ -61,13 +61,15 @@ TemplateReplacementList = List[Union[str, TemplateReplacement]]
 class PartiallyRenderedCard:
     qnodes: TemplateReplacementList
     anodes: TemplateReplacementList
+    css: str
+    latex_svg: bool
 
     @classmethod
     def from_proto(cls, out: _pb.RenderCardOut) -> PartiallyRenderedCard:
         qnodes = cls.nodes_from_proto(out.question_nodes)
         anodes = cls.nodes_from_proto(out.answer_nodes)
 
-        return PartiallyRenderedCard(qnodes, anodes)
+        return PartiallyRenderedCard(qnodes, anodes, out.css, out.latex_svg)
 
     @staticmethod
     def nodes_from_proto(
@@ -151,6 +153,7 @@ class TemplateRenderContext:
         self._template = template
         self._fill_empty = fill_empty
         self._fields: Optional[Dict] = None
+        self._latex_svg = False
         if not notetype:
             self._note_type = note.model()
         else:
@@ -197,6 +200,9 @@ class TemplateRenderContext:
     def note_type(self) -> NotetypeDict:
         return self._note_type
 
+    def latex_svg(self) -> bool:
+        return self._latex_svg
+
     # legacy
     def qfmt(self) -> str:
         return templates_for_card(self.card(), self._browser)[0]
@@ -227,9 +233,11 @@ class TemplateRenderContext:
             answer_text=aout.text,
             question_av_tags=av_tags_to_native(qout.av_tags),
             answer_av_tags=av_tags_to_native(aout.av_tags),
-            css=self.note_type()["css"],
+            css=partial.css,
         )
 
+        self._latex_svg = partial.latex_svg
+
         if not self._browser:
             hooks.card_did_render(output, self)
 
diff --git a/rslib/backend.proto b/rslib/backend.proto
index b89f827bc..234228213 100644
--- a/rslib/backend.proto
+++ b/rslib/backend.proto
@@ -704,6 +704,8 @@ message RenderUncommittedCardLegacyIn {
 message RenderCardOut {
   repeated RenderedTemplateNode question_nodes = 1;
   repeated RenderedTemplateNode answer_nodes = 2;
+  string css = 3;
+  bool latex_svg = 4;
 }
 
 message RenderedTemplateNode {
diff --git a/rslib/src/backend/cardrendering.rs b/rslib/src/backend/cardrendering.rs
index b68c8ba9a..fdd085649 100644
--- a/rslib/src/backend/cardrendering.rs
+++ b/rslib/src/backend/cardrendering.rs
@@ -175,6 +175,8 @@ impl From<RenderCardOutput> for pb::RenderCardOut {
         pb::RenderCardOut {
             question_nodes: rendered_nodes_to_proto(o.qnodes),
             answer_nodes: rendered_nodes_to_proto(o.anodes),
+            css: o.css,
+            latex_svg: o.latex_svg,
         }
     }
 }
diff --git a/rslib/src/notetype/render.rs b/rslib/src/notetype/render.rs
index 330854f5b..e232fa68c 100644
--- a/rslib/src/notetype/render.rs
+++ b/rslib/src/notetype/render.rs
@@ -16,6 +16,8 @@ use crate::{
 pub struct RenderCardOutput {
     pub qnodes: Vec<RenderedNode>,
     pub anodes: Vec<RenderedNode>,
+    pub css: String,
+    pub latex_svg: bool,
 }
 
 impl Collection {
@@ -119,7 +121,12 @@ impl Collection {
             nt.is_cloze(),
             &self.tr,
         )?;
-        Ok(RenderCardOutput { qnodes, anodes })
+        Ok(RenderCardOutput {
+            qnodes,
+            anodes,
+            css: nt.config.css.clone(),
+            latex_svg: nt.config.latex_svg,
+        })
     }
 
     // Add special fields if they don't clobber note fields