implement some improvements from #3

1 files changed, 80 insertions, 0 deletions

diff --git a/lib.typ b/lib.typ
new file mode 100644
index 0000000..213c33d
--- /dev/null
+++ b/lib.typ
@@ -0,0 +1,80 @@
+// TODO: workaround until Typst gets a real ex unit.
+// See <https://github.com/typst/typst/issues/2405>
+#let ex = 0.47
+#let defaults = (
+  drop-tex: 0.5em*ex,
+  drop-xe: 0.5em*ex,
+
+  kern-te: -.1667em,
+  kern-ex: -.125em,
+  kern-la: -.36em,
+  kern-at: -.15em,
+  kern-xe: -.125em,
+  kern-et: -.1667em,
+  kern-el: -.125em,
+  kern-x2: 0.15em,
+)
+#let config = state("metalogo", defaults)
+#let metalogo(..opts) = context{
+  config.update(c => {
+    for (key, value) in opts.named() {
+      c.insert(key, value)
+    }
+    return c
+  })
+}
+
+#let drop(body, distance: 0pt) = box[#move(dy: distance)[#body]]
+#let mirror(body) = scale(x: -100%)[#body]
+
+#let TeX = context[#box[#{
+  let cfg = config.get()
+  [T]
+  h(cfg.kern-te)
+  drop(distance: cfg.drop-tex)[E]
+  h(cfg.kern-ex)
+  [X]
+}]]
+
+#let Xe = context[#box[#{
+  let cfg = config.get()
+  [X]
+  h(cfg.kern-xe)
+  drop(distance: cfg.drop-xe)[#mirror[E]]
+}]]
+
+#let LaTeX = context[#box[#{
+  let cfg = config.get()
+
+  [L]
+  h(cfg.kern-la)
+  drop(distance: -.2em)[#text(0.7em)[A]]
+  h(cfg.kern-at)
+  TeX
+}]]
+
+#let XeTeX = context[#box[#{
+  let cfg = config.get()
+
+  Xe
+  h(cfg.kern-et)
+  TeX
+}]]
+
+#let XeLaTeX = context[#box[#{
+  let cfg = config.get()
+
+  Xe
+  h(cfg.kern-el)
+  LaTeX
+}]]
+
+#let LuaLaTeX = box[Lua#LaTeX]
+#let LuaTeX = box[Lua#TeX]
+
+#let LaTeXe = context[#box[#{
+  LaTeX
+  [2]
+  sym.epsilon
+}]]
+