Update code

johnsamuelwrites · johnsamuelwrites · commit c7eb0d088bb9 · 2026-05-09T16:20:01.000+02:00
diff --git a/multilingualprogramming/codegen/ui_lowering.py b/multilingualprogramming/codegen/ui_lowering.py
@@ -103,22 +103,21 @@ class UILoweringPass:
     def __init__(self) -> None:
         self._result = UILoweringResult()
         self._signal_names: set[str] = set()
-        self._render_roots: list[str] = []
+        self._has_render_root = False
         self._canvas_names: list[str] = []
         self._functions: list[str] = []
         self._ui_function_names: set[str] = set()
         self._render_function = ""
-        self._preamble = ""
 
     def lower(self, program: IRProgram) -> UILoweringResult:
         """Lower an IRProgram to UI output."""
-        self._emit_preamble()
+        preamble = self._emit_preamble()
         for node in program.body:
             self._lower_node(node)
 
         self._wire_render_updates()
 
-        js_parts = [self._preamble]
+        js_parts = [preamble]
         js_parts.extend(self._result.js_signals)
         js_parts.extend(self._functions)
         js_parts.extend(self._result.js_handlers)
@@ -156,8 +155,8 @@ def _lower_node(self, node: IRNode) -> None:
                 for child in node.body:
                     self._lower_node(child)
 
-    def _emit_preamble(self) -> None:
-        self._preamble = """// Generated by Multilingual UI lowering
+    def _emit_preamble(self) -> str:
+        return """// Generated by Multilingual UI lowering
 class ReactiveSignal {
   constructor(value) {
     this._value = value;
@@ -300,7 +299,7 @@ def _lower_function(self, node: IRFunction) -> None:
         self._functions.append(f"{keyword} {node.name}({params}) {{\n{body}\n}}")
 
     def _lower_render_block(self, node: IRRenderBlock) -> None:
-        self._render_roots.append("__ml_root")
+        self._has_render_root = True
         lines = [
             "function __ml_render() {",
             "  const __root = document.getElementById('__ml_root');",
@@ -327,8 +326,12 @@ def _emit_html(self) -> str:
             f'    <div id="{name}" class="ml-canvas"></div>'
             for name in self._canvas_names
         )
-        root_html = '    <div id="__ml_root"></div>' if self._render_roots else ""
-        title = "Memory Game - Multilingual" if self._render_roots else "Multilingual UI Preview"
+        root_html = '    <div id="__ml_root"></div>' if self._has_render_root else ""
+        title = (
+            "Memory Game - Multilingual"
+            if self._has_render_root
+            else "Multilingual UI Preview"
+        )
         return f"""<!DOCTYPE html>
 <html lang="en">
 <head>
