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, 16 insertions, 5 deletions

diff --git a/tests/typ/text.typ b/tests/typ/text.typ
index d86f4895..b424cee8 100644
--- a/tests/typ/text.typ
+++ b/tests/typ/text.typ
@@ -1,8 +1,19 @@
 // Test simple text.
 
----
-Hello 🌏!
+#page(width: 250pt)
 
----
-// Some code stuff in text.
-let f() , ; : | + - /= == 12 "string"
+But, soft! what light through yonder window breaks? It is the east, and Juliet
+is the sun. Arise, fair sun, and kill the envious moon, Who is already sick and
+pale with grief, That thou her maid art far more fair than she: Be not her maid,
+since she is envious; Her vestal livery is but sick and green And none but fools
+do wear it; cast it off. It is my lady, O, it is my love! O, that she knew she
+were! She speaks yet she says nothing: what of that? Her eye discourses; I will
+answer it.
+
+I am too bold, 'tis not to me she speaks: Two of the fairest stars in all the
+heaven, Having some business, do entreat her eyes To twinkle in their spheres
+till they return. What if her eyes were there, they in her head? The brightness
+of her cheek would shame those stars, As daylight doth a lamp; her eyes in
+heaven Would through the airy region stream so bright That birds would sing and
+think it were not night. See, how she leans her cheek upon her hand! O, that I
+were a glove upon that hand, That I might touch that cheek!