From 48a871186b4659fd5948ca011773593323267f64 Mon Sep 17 00:00:00 2001
From: jess <jess@else-if.org>
Date: Sat, 30 May 2026 20:55:33 -0700
Subject: [PATCH] syntax highlighting editor exports

---
 viewport/src/editor/eval.rs  |  8 ++++----
 viewport/src/editor/state.rs | 21 +++++++++++++++++++++
 2 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/viewport/src/editor/eval.rs b/viewport/src/editor/eval.rs
index 76e68cd..69c4018 100644
--- a/viewport/src/editor/eval.rs
+++ b/viewport/src/editor/eval.rs
@@ -399,7 +399,7 @@ impl super::EditorState {
     pub(super) fn build_eval_interpreter(&self, block_idx: usize) -> acord_core::interp::Interpreter {
         use acord_core::interp;
 
-        let mut eval_interp = interp::Interpreter::new();
+        let mut eval_interp = self.new_eval_interpreter();
         let block_id = match self.layout.get(block_idx) {
             Some(&id) => id,
             None => return eval_interp,
@@ -451,7 +451,7 @@ impl super::EditorState {
             return interp::ModuleExports::default();
         }
 
-        let mut interp = interp::Interpreter::new();
+        let mut interp = self.new_eval_interpreter();
 
         if !module.is_root {
             if let Some(root) = self.modules.iter().find(|m| m.is_root) {
@@ -541,7 +541,7 @@ impl super::EditorState {
         });
 
         if let Some(submod) = submodule_match {
-            let mut nested = interp::Interpreter::new();
+            let mut nested = self.new_eval_interpreter();
             for d in interp::extract_use_declarations(&clean) {
                 self.apply_use_decl(&d, visited, &mut nested);
             }
@@ -557,7 +557,7 @@ impl super::EditorState {
             return;
         }
 
-        let mut nested = interp::Interpreter::new();
+        let mut nested = self.new_eval_interpreter();
         for d in interp::extract_use_declarations(&clean) {
             self.apply_use_decl(&d, visited, &mut nested);
         }
diff --git a/viewport/src/editor/state.rs b/viewport/src/editor/state.rs
index 84f31d1..1c3ac78 100644
--- a/viewport/src/editor/state.rs
+++ b/viewport/src/editor/state.rs
@@ -115,6 +115,8 @@ pub struct EditorState {
     pub(super) heavy_token: u64,
     /// deferred-rebuild arm; set on edit, cleared on debounce fire.
     pub(super) heavy_pending: bool,
+    /// setup applied to every interpreter the editor builds for eval.
+    pub(super) interp_setup: Option<std::rc::Rc<dyn Fn(&mut acord_core::interp::Interpreter)>>,
 }
 
 impl EditorState {
@@ -184,9 +186,28 @@ impl EditorState {
             syntax_rules: crate::syntax::SyntaxRules::cordial(),
             heavy_token: 0,
             heavy_pending: false,
+            interp_setup: None,
         }
     }
 
+    /// installs a routine run on each fresh eval interpreter — register hooks,
+    /// provide shared state, seed vars, add module paths.
+    pub fn set_interpreter_setup<F>(&mut self, setup: F)
+    where
+        F: Fn(&mut acord_core::interp::Interpreter) + 'static,
+    {
+        self.interp_setup = Some(std::rc::Rc::new(setup));
+    }
+
+    /// fresh interpreter with the registered project setup applied.
+    pub(super) fn new_eval_interpreter(&self) -> acord_core::interp::Interpreter {
+        let mut i = acord_core::interp::Interpreter::new();
+        if let Some(setup) = &self.interp_setup {
+            setup(&mut i);
+        }
+        i
+    }
+
     /// replaces the active syntax rule set.
     pub fn set_syntax_rules(&mut self, rules: crate::syntax::SyntaxRules) {
         self.syntax_rules = rules;