Related comment on issue
https://github.com/zed-industries/zed/issues/14222#issuecomment-2418375056
On `crates/gpui/src/platform/linux/text_system.rs` on method
`CosmicTextSystem::new` `load_system_fonts` is being called twice:
```rust
pub(crate) fn new() -> Self {
let mut font_system = FontSystem::new();
// todo(linux) make font loading non-blocking
font_system.db_mut().load_system_fonts();
Self(RwLock::new(CosmicTextSystemState {
font_system,
swash_cache: SwashCache::new(),
scratch: ShapeBuffer::default(),
loaded_fonts_store: Vec::new(),
font_ids_by_family_cache: HashMap::default(),
postscript_names: HashMap::default(),
}))
}
```
First one on `FontSystem::new()` and second one is explicit on
`font_system.db_mut().load_system_fonts()`. The first call
`FontSystem::new()` is defined as:
```
pub fn new() -> Self {
Self::new_with_fonts(core::iter::empty())
}
```
And `new_with_fonts`:
```rust
/// Create a new [`FontSystem`] with a pre-specified set of fonts.
pub fn new_with_fonts(fonts: impl IntoIterator<Item = fontdb::Source>) -> Self {
let locale = Self::get_locale();
log::debug!("Locale: {}", locale);
let mut db = fontdb::Database::new();
//TODO: configurable default fonts
db.set_monospace_family("Fira Mono");
db.set_sans_serif_family("Fira Sans");
db.set_serif_family("DejaVu Serif");
Self::load_fonts(&mut db, fonts.into_iter());
Self::new_with_locale_and_db(locale, db)
}
```
Finally `Self::load_fonts(&mut db, fonts.into_iter())` calls
`load_system_fonts`:
```rust
#[cfg(feature = "std")]
fn load_fonts(db: &mut fontdb::Database, fonts: impl Iterator<Item = fontdb::Source>) {
#[cfg(not(target_arch = "wasm32"))]
let now = std::time::Instant::now();
db.load_system_fonts();
for source in fonts {
db.load_font_source(source);
}
...
```
Release Notes:
- Remove duplicate font loading on Linux
In the current code implementation, it seems that the only difference
between `all_font_names` and `all_font_families` is whether dynamically
loaded font resources are included. Specifically, `all_font_families`
returns the names of all system fonts, while `all_font_names` includes
both the system font names and the dynamically loaded font names. In
other words, `all_font_families` is a strict subset of `all_font_names`.
This is what I observed in my tests on macOS.
<img width="682" alt="截屏2024-07-28 00 49 29"
src="https://github.com/user-attachments/assets/47317c28-0074-49d2-bcfa-052cab13e335">
Related codes:
```rust
let x: HashSet<_> = self.all_font_names().into_iter().collect();
let y: HashSet<_> = self.all_font_families().into_iter().collect();
let only_in_x = x.difference(&y).collect::<Vec<_>>();
let only_in_y = y.difference(&x).collect::<Vec<_>>();
println!("=====================================");
println!("1 -> {:?}", only_in_x);
println!("-------------------------------------");
println!("2 -> {:?}", only_in_y);
```
Release Notes:
- N/A
The names suggested by `buffer_font_family` are reported by
`all_font_names`. Therefore, `all_font_names` should report family names
rather than postscript names.
close#14854
Release Notes:
- N/A
Since `WindowsDispatcher` requires a minimum Windows version of Windows
10 Fall Creators Update (10.0.16299), and the `alacritty_terminal`
dependency relies on conPTY, an API introduced in the same version,
additionally, `DirectWriteTextSystem` also relies on Windows 10 Fall
Creators Update (10.0.16299), so it seems reasonable to make
`CosmicTextSystem` Linux-only. And we can use `DirectWriteTextSystem` on
the Windows platform exclusively. I hope this approach makes sense.
Release Notes:
- N/A
To reference the system font, use the special ".SystemUIFont" family
name.
/cc @PixelJanitor
Release Notes:
- Switched to the system UI font for user interface elements on macOS.
Co-authored-by: Antonio Scandurra <antonio@zed.dev>
Updated version of #9741 with fixes for the problems raised in #9774. I
only verified that the images no longer look blueish on Linux, because I
don't have a Mac.
cc @osiewicz
Release Notes:
- N/A
---------
Signed-off-by: Niklas Wimmer <mail@nwimmer.me>
I mainly focused on improving the `font_id` function, see the
description of e286483262 for more
details. The rest are some drive-by changes I could not resist to.
When I am right about af4d6c43ce, someone
with a Mac could change it there as well.
This PR is probably best reviewed commit by commit :)
cc @gabydd @h3mosphere
Release Notes:
- N/A
---------
Signed-off-by: Niklas Wimmer <mail@nwimmer.me>
This practice makes it difficult to locate todo!s in my code when I'm
working. Let's take out the bang if we want to keep doing this.
Release Notes:
- N/A
This is a rebase of @gabydds text_system updates. with some small
cleanups.
Currently cannot test this as build is not working in linux. Im just
putting it up here before I forget about it.
---------
Co-authored-by: gabydd <gabydinnerdavid@gmail.com>
Co-authored-by: Mikayla Maki <mikayla@zed.dev>
It allows us to receive messages from the dispatcher,
which breaks us out of waiting and lets us execute
main thread runnables as a part of the main loop.
