Configurable font edges ⚙

Adds top-edge and bottom-edge parameters to the font function. These define how
the box around a word is computed. The possible values are:
- ascender
- cap-height (default top edge)
- x-height
- baseline (default bottom edge)
- descender

The defaults are chosen so that it's easy to create good-looking designs with
vertical alignment. Since they are much tighter than what most other software
uses by default, the default leading had to be increased to 50% of the font size
and paragraph spacing to 100% of the font size.

The values cap-height and x-height fall back to ascender in case they are zero
because this value may occur in fonts that don't have glyphs with cap- or
x-height (like Twitter Color Emoji). Since cap-height is the default top edge,
doing no fallback would break things badly.

Removes softness in favor of a simple boolean for pages and a more finegread u8
for spacing. This is needed to make paragraph spacing consume line spacing
created by hard line breaks.

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/typ/control/let.typ b/tests/typ/control/let.typ
index dd971ee5..4f84aa67 100644
--- a/tests/typ/control/let.typ
+++ b/tests/typ/control/let.typ
@@ -17,8 +17,8 @@
 
 ---
 // Syntax sugar for function definitions.
-#let background = #239dad
-#let rect(body) = rect(width: 2cm, height: 1cm, fill: background, body)
+#let background = #9feb52
+#let rect(body) = rect(width: 2cm, fill: background, pad(5pt, body))
 #rect[Hi!]
 
 // Error: 13 expected body