Refactor handout.typ

Reviewed-on: #7
Co-authored-by: Mark <mark@betalupi.com>
Co-committed-by: Mark <mark@betalupi.com>

lib/typst/local/handout/0.1.0/lib.typ

@@ -0,0 +1,113 @@
+/// Typst handout library, used for all documents in this repository.
+
+// Re-exports
+// All functions that maybe used by client code are listed here
+#import "misc.typ": *
+#import "object.typ": problem, definition, theorem
+#import "solution.typ": if_solutions, if_no_solutions, solution
+
+
+/// Main handout wrapper.
+/// Use this as follows:
+///
+/// ```
+/// #show: handout.with(
+///  group: "Advanced 2",
+///  title: [Handout Title],
+///  by: "author",
+///  subtitle: "optional",
+/// )
+///
+/// <rest of document>
+/// ```
+#let handout(
+  doc,
+  group: none,
+  title: none,
+  by: none,
+  subtitle: none,
+) = {
+  set page(
+    margin: 20mm,
+    width: 8.5in,
+    height: 11in,
+    footer: align(
+      center,
+      context counter(page).display(),
+    ),
+    footer-descent: 5mm,
+  )
+
+  //
+  // Text style
+  set text(font: "New Computer Modern")
+  set par(
+    leading: 0.55em,
+    first-line-indent: 0mm,
+    justify: true,
+    spacing: 0.5em,
+  )
+
+  //
+  // List style
+  show list: set block(spacing: 0.5em, below: 1em)
+  set list(
+    tight: false,
+    indent: 5mm,
+    spacing: 3mm,
+  )
+
+  //
+  // Heading style
+  set heading(numbering: (..nums) => nums.pos().at(0))
+  show heading.where(level: 1): it => {
+    set align(center)
+    set text(weight: "bold")
+    block[
+      Section #counter(heading).display(): #text(it.body)
+    ]
+  }
+
+  //
+  // Hack for custom references
+  show ref: it => {
+    import "object.typ": ref_obj
+
+    let x = ref_obj(it) // Custom impl for object references
+    if (x != none) { return x }
+
+    return it // Use default `ref` implementation otherwise
+  }
+
+
+  //
+  // Begin content
+  //
+
+  // Make handout title
+  {
+    import "header.typ": make_header, solution_warning
+    import "solution.typ": show_solutions
+
+    let url = link(
+      "https://betalupi.com/handouts",
+      "betalupi.com/handouts",
+    )
+
+    make_header(
+      title,
+      subtitle: subtitle,
+      by: by,
+      top_left: group,
+      top_right: url,
+    )
+
+    if show_solutions {
+      solution_warning()
+    }
+  }
+
+  // Include rest of document
+  doc
+}
+