note markers link back to anchors (#19)

Author: nleanba

Marginalia.pdf

@@ -551,7 +551,7 @@
   /// - If ```typc auto```, will use the given @note.numbering.
   /// -> none | auto | function | string
   anchor-numbering: auto,
-  /// Whether to make have the anchor link to the note.
+  /// Whether to have the anchor link to the note, and vice-versa.
   /// -> boolean
   link-anchor: true,
   /// Counter to use for this note.
@@ -629,15 +629,23 @@
 
     assert(side == "left" or side == "right", message: "side must be auto, left, right, outer, or inner.")
     let body = if numbering != none {
-      if flush-numbering {
-        box({
+      let number = {
+        if link-anchor {
+          show link: it => {
+            show underline: i => i.body
+            it
+          }
+          link(here(), counter.display(numbering))
+        } else {
           counter.display(numbering)
-        })
+        }
+      }
+      if flush-numbering {
+        box(number)
         h(0pt, weak: true)
         body
       } else {
         body
-        let number = counter.display(numbering)
         let width = measure({
           set text(..text-style)
           set par(..par-style)

lib.typ

@@ -42,8 +42,8 @@
 #show: marginalia.show-frame.with(footer: false)
 
 
-#show heading.where(level: 1): set block(above: 34pt, below: 12pt)
-#show heading.where(level: 2): set block(above: 26pt, below: 12pt)
+#show heading.where(level: 1): set block(above: 30pt, below: 12pt)
+#show heading.where(level: 2): set block(above: 20pt, below: 10pt)
 
 #let note = note.with(text-style: (size: 8.5pt))
 #let notefigure = notefigure.with(text-style: (size: 8.5pt))
@@ -86,6 +86,7 @@ _Write into the margins!_
 
 = Setup
 Put something akin to the following at the start of your `.typ` file:
+#note[Do not #[```typ #import "...": *```], this will shadow built-in functions.]
 #codeblock[
   ```typst
   #import "@preview/marginalia:0.2.4" as marginalia: note, notefigure, wideblock
@@ -119,8 +120,6 @@ Additionally, I recommend using Typst's partial function application feature to
   ```
 ]
 
-Do not #strike[```typ #import "@preview/marginalia:0.2.4": *```], this will shadow built-in functions.
-
 // // #context if calc.even(here().page()) {pagebreak(to: "odd", weak: true)}
 // #pagebreak(to: "odd", weak: true)
 // = Showcase