The default was Berkeley Mono, which is one machine's licensed font and
reads as configuration rather than a default. It is now the system's
monospace font, so a fresh install looks right anywhere and --font is
there for anyone who wants their own.
Getting "the system monospace font" is less direct than it sounds.
Family::Name("monospace") resolves to Noto Sans — not monospaced at all.
cosmic-text's generic Family::Monospace goes through fontdb's built-in
preference, "FreeMono", which is usually absent, and then lands on an
arbitrary face (Adwaita Mono here). Enabling cosmic-text's fontconfig
feature changes nothing, because fontdb's config parser does not pick up
the alias files a distribution actually ships.
So fontconfig is asked directly: `fc-match -f %{family} monospace`, which
is the same answer every other application on the system gets — Noto Sans
Mono here. It costs 10ms on the worker thread that is already waiting for
the compositor, so nothing in wall clock. Without the fontconfig tools a
short list of common distribution defaults is tried instead.
Weight and stretch overrides went too: they were tuned for Berkeley Mono
Medium SemiCondensed, and a family name carries that anyway — the full
name resolves to exactly that face, verified by rendering both.
--verbose now reports the family the labels were shaped with, since the
default legitimately differs from machine to machine.
"title · app" centred under each thumbnail, in the same font the rofi
theme used (Berkeley Mono at pango's "small"), with the selected tile's
label inverted onto the yellow the way rofi's element background did.
Long titles are ellipsised to the cell width.
Text comes from cosmic-text, which brings real shaping. The catch is
cost: building a font system and rasterising the first glyphs takes
~55ms, nearly doubling a 65ms startup. But the capture phase is ~55ms of
sitting blocked while the compositor copies pixels, so labels are shaped
on a worker thread started before the captures and joined after them.
The measured labels phase is now 0.0ms — it costs nothing in wall clock.
Two thirds of that font cost was FontSystem::new() scanning all 1793
system faces, which even new_with_fonts() does. So the database is built
by hand: the user's own font directories first, since they are small,
and the full system scan only when the family isn't found there. An
unknown family still resolves, because that fallback is exactly the
system scan (verified: --font "No Such Font" renders in Noto).
--hide-labels restores the icon-only grid, and --font/--font-size make
the family and size settable. Adds a test that a label actually puts
pixels on the surface, one for ellipsising, and one pinning the label row
into the element geometry.
N0VA
Milad Alizadeh