[fix] equation numbering with circuits (#4)

When equation numbering is turned on, display-style braces as used with lstick, rstick and gate inputs/outputs, are not drawn correctly.

We could use non-block math but then the bounding box of the rectangles is not measured correctly. Instead we just turn equation numbering off for the entire circuit.

fixes #3

src/draw-functions.typ

@@ -8,14 +8,15 @@
 
 
 
-// create a sized brace with given length. 
+// Creates a sized brace with given length. 
 // `brace` can be auto, defaulting to "{" if alignment is right
-// and "}" if alignment is left. 
+// and "}" if alignment is left. Other possible values are 
+// "[", "]", "|", "{", and "}".
 #let create-brace(brace, alignment, length) = {
-  let brace-symbol = if brace == auto {
-      if alignment == right {"{"} else {"}"} 
-    } else { brace }
-  return $ lr(#brace-symbol#block(height: length)) $
+  if brace == auto {
+    brace = if alignment == right {"{"} else {"}"} 
+  }
+  return $ lr(#brace, size: length) $
 }
 
 

src/quill.typ

@@ -71,7 +71,8 @@
     panic("Unexpected named argument '" + children.named().keys().at(0) + "' for quantum-circuit()")
   }
   set text(color, size: font-size)
-
+  set math.equation(numbering: none)
+
   style(styles => {
 
   // Parameter object to pass to draw-function containing current style info

tests/decorations/lstick rstick/test.typ

@@ -36,4 +36,12 @@
 
 #quantum-circuit(
   1, rstick("very long rstick")
-)
+)
+
+#pagebreak()
+
+// lstick with equation numbering
+#set math.equation(numbering: "1")
+#quantum-circuit(
+  lstick($|0〉$, brace: "{"), 1
+)