In `FontSystem`, `font_matches_cache` is an ever growing cache.
It can also be a fast growing one in stress tests like running this
in `cosmic-term`:
mpv -speed 3 -vo tct <some_video>
So this commit adds a size limit to that cache, and clears the cache
when that limit is reached, which shouldn't be a common occurrence in
normal usage.
Signed-off-by: Mohammad AlSaleh <CE.Mohammad.AlSaleh@gmail.com>
This should/could improve fallback order.
This could also probably be utilized for non-Monospace fallback too.
But I didn't want to touch that code to avoid accidentally breaking
anything.
Signed-off-by: Mohammad AlSaleh <CE.Mohammad.AlSaleh@gmail.com>
When matching to a default monospace width, big fonts like those
containing symbols and emojis got too small from font resizing.
Adding a glyph-to-default rounded factor to the calculation should fix
that issue without losing monospatiality.
Fixespop-os/cosmic-term#69.
Signed-off-by: Mohammad AlSaleh <CE.Mohammad.AlSaleh@gmail.com>
A combination of some ideas:
* Try all Monospace fonts before giving up.
* Relax exact weight restriction on font matching when trying Monospace
fall-back. Try smaller weights if needed.
* Make the fall-back try order weight-offset aware, AND script-aware.
* And finally, add the option to adjust the font size of glyphs using
fall-back Monospace fonts, so the width of them matches the default
font width.
For my use-case, the current fall-back attempt always fails with
Arabic script. And none of the Arabic-supporting Monospace fonts in
my system also support medium weight. So, if my default font is set
to medium weight, script-aware fall-back alone will still not work.
Signed-off-by: Mohammad AlSaleh <CE.Mohammad.AlSaleh@gmail.com>
- Scroll is identified by line index and layout index, instead of just
layout index
- Shaping has the option to prune, where caches outside of the scroll
view are cleared
- Syntax editor no longer requires layout of all lines, only of lines
inside scroll
- BufferLine has a metadata field that can be used by other abstractions
to know when text was changed
