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.

32 files changed, 0 insertions, 0 deletions

diff --git a/tests/ref/comment.png b/tests/ref/comment.png
index 1fad97fe..6d5723ef 100644
--- a/tests/ref/comment.png
+++ b/tests/ref/comment.png
diff --git a/tests/ref/control/for.png b/tests/ref/control/for.png
index d04ea62c..f3830b34 100644
--- a/tests/ref/control/for.png
+++ b/tests/ref/control/for.png
diff --git a/tests/ref/control/if.png b/tests/ref/control/if.png
index 99bde49e..0527754e 100644
--- a/tests/ref/control/if.png
+++ b/tests/ref/control/if.png
diff --git a/tests/ref/control/invalid.png b/tests/ref/control/invalid.png
index ff4c6987..e9c64b8a 100644
--- a/tests/ref/control/invalid.png
+++ b/tests/ref/control/invalid.png
diff --git a/tests/ref/control/let.png b/tests/ref/control/let.png
index 5fb1c992..20aad953 100644
--- a/tests/ref/control/let.png
+++ b/tests/ref/control/let.png
diff --git a/tests/ref/control/while.png b/tests/ref/control/while.png
index 890131f1..2ea1bcb0 100644
--- a/tests/ref/control/while.png
+++ b/tests/ref/control/while.png
diff --git a/tests/ref/expand.png b/tests/ref/expand.png
index fc1f5de9..f18e929b 100644
--- a/tests/ref/expand.png
+++ b/tests/ref/expand.png
diff --git a/tests/ref/expr/array.png b/tests/ref/expr/array.png
index 784553b3..b1e20348 100644
--- a/tests/ref/expr/array.png
+++ b/tests/ref/expr/array.png
diff --git a/tests/ref/expr/block-invalid.png b/tests/ref/expr/block-invalid.png
index b380defc..d1e85402 100644
--- a/tests/ref/expr/block-invalid.png
+++ b/tests/ref/expr/block-invalid.png
diff --git a/tests/ref/expr/block.png b/tests/ref/expr/block.png
index d5ad52ae..d8ea84fb 100644
--- a/tests/ref/expr/block.png
+++ b/tests/ref/expr/block.png
diff --git a/tests/ref/expr/call-invalid.png b/tests/ref/expr/call-invalid.png
index 88f13780..eb192357 100644
--- a/tests/ref/expr/call-invalid.png
+++ b/tests/ref/expr/call-invalid.png
diff --git a/tests/ref/expr/call.png b/tests/ref/expr/call.png
index 7197bb90..26f1cb03 100644
--- a/tests/ref/expr/call.png
+++ b/tests/ref/expr/call.png
diff --git a/tests/ref/expr/dict.png b/tests/ref/expr/dict.png
index 28a7cb3b..1caef1e0 100644
--- a/tests/ref/expr/dict.png
+++ b/tests/ref/expr/dict.png
diff --git a/tests/ref/expr/ops.png b/tests/ref/expr/ops.png
index 95a24c0e..2f3a28ea 100644
--- a/tests/ref/expr/ops.png
+++ b/tests/ref/expr/ops.png
diff --git a/tests/ref/full/coma.png b/tests/ref/full/coma.png
index f5db682d..5fd6d801 100644
--- a/tests/ref/full/coma.png
+++ b/tests/ref/full/coma.png
diff --git a/tests/ref/library/font.png b/tests/ref/library/font.png
index 8e611b16..199a15f2 100644
--- a/tests/ref/library/font.png
+++ b/tests/ref/library/font.png
diff --git a/tests/ref/library/image.png b/tests/ref/library/image.png
index af497c8d..0a45e11b 100644
--- a/tests/ref/library/image.png
+++ b/tests/ref/library/image.png
diff --git a/tests/ref/library/pad.png b/tests/ref/library/pad.png
index a655061b..3536db5d 100644
--- a/tests/ref/library/pad.png
+++ b/tests/ref/library/pad.png
diff --git a/tests/ref/library/page.png b/tests/ref/library/page.png
index 1537fad4..7d1ff96f 100644
--- a/tests/ref/library/page.png
+++ b/tests/ref/library/page.png
diff --git a/tests/ref/library/pagebreak.png b/tests/ref/library/pagebreak.png
index b1ee0eef..f0052f9e 100644
--- a/tests/ref/library/pagebreak.png
+++ b/tests/ref/library/pagebreak.png
diff --git a/tests/ref/library/shapes.png b/tests/ref/library/shapes.png
index 8ace6fd6..a244feb1 100644
--- a/tests/ref/library/shapes.png
+++ b/tests/ref/library/shapes.png
diff --git a/tests/ref/library/spacing.png b/tests/ref/library/spacing.png
index 0842d409..6a234a8a 100644
--- a/tests/ref/library/spacing.png
+++ b/tests/ref/library/spacing.png
diff --git a/tests/ref/markup/emph.png b/tests/ref/markup/emph.png
index f002610e..75231a62 100644
--- a/tests/ref/markup/emph.png
+++ b/tests/ref/markup/emph.png
diff --git a/tests/ref/markup/escape.png b/tests/ref/markup/escape.png
index 3fa44c6d..8e946279 100644
--- a/tests/ref/markup/escape.png
+++ b/tests/ref/markup/escape.png
diff --git a/tests/ref/markup/heading.png b/tests/ref/markup/heading.png
index 9f2ce6ec..3473f798 100644
--- a/tests/ref/markup/heading.png
+++ b/tests/ref/markup/heading.png
diff --git a/tests/ref/markup/linebreak.png b/tests/ref/markup/linebreak.png
index fec65248..4e4702f9 100644
--- a/tests/ref/markup/linebreak.png
+++ b/tests/ref/markup/linebreak.png
diff --git a/tests/ref/markup/nbsp.png b/tests/ref/markup/nbsp.png
index 3e1f0ee7..89f75f14 100644
--- a/tests/ref/markup/nbsp.png
+++ b/tests/ref/markup/nbsp.png
diff --git a/tests/ref/markup/raw.png b/tests/ref/markup/raw.png
index ce833428..59a4e3dd 100644
--- a/tests/ref/markup/raw.png
+++ b/tests/ref/markup/raw.png
diff --git a/tests/ref/markup/strong.png b/tests/ref/markup/strong.png
index ac38c436..7e62f0f3 100644
--- a/tests/ref/markup/strong.png
+++ b/tests/ref/markup/strong.png
diff --git a/tests/ref/repr.png b/tests/ref/repr.png
index 2f5697fd..ad10705c 100644
--- a/tests/ref/repr.png
+++ b/tests/ref/repr.png
diff --git a/tests/ref/spacing.png b/tests/ref/spacing.png
index 8bdc9885..454b154f 100644
--- a/tests/ref/spacing.png
+++ b/tests/ref/spacing.png
diff --git a/tests/ref/text.png b/tests/ref/text.png
index 38ae364d..1dd70c1c 100644
--- a/tests/ref/text.png
+++ b/tests/ref/text.png