329941c4a6
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> |
||
|---|---|---|
| .github/workflows | ||
| benches | ||
| examples | ||
| fonts | ||
| sample | ||
| screenshots | ||
| src | ||
| tests | ||
| .gitattributes | ||
| .gitignore | ||
| Cargo.toml | ||
| CHANGELOG.md | ||
| ci.sh | ||
| deny.toml | ||
| editor-libcosmic.sh | ||
| editor-orbclient.sh | ||
| editor-test.sh | ||
| LICENSE-APACHE | ||
| LICENSE-MIT | ||
| multiview.sh | ||
| README.md | ||
| redoxer.sh | ||
| rich-text.sh | ||
| terminal.sh | ||
| test.sh | ||
COSMIC Text
Pure Rust multi-line text handling.
COSMIC Text provides advanced text shaping, layout, and rendering wrapped up into a simple abstraction. Shaping is provided by rustybuzz, and supports a wide variety of advanced shaping operations. Rendering is provided by swash, which supports ligatures and color emoji. Layout is implemented custom, in safe Rust, and supports bidirectional text. Font fallback is also a custom implementation, reusing some of the static fallback lists in browsers such as Chromium and Firefox. Linux, macOS, and Windows are supported with the full feature set. Other platforms may need to implement font fallback capabilities.
Screenshots
Arabic translation of Universal Declaration of Human Rights
Hindi translation of Universal Declaration of Human Rights
Simplified Chinese translation of Universal Declaration of Human Rights
Roadmap
The following features must be supported before this is "ready":
- Font loading (using fontdb)
- Preset fonts
- System fonts
- Text styles (bold, italic, etc.)
- Per-buffer
- Per-span
- Font shaping (using rustybuzz)
- Cache results
- RTL
- Bidirectional rendering
- Font fallback
- Choose font based on locale to work around "unification"
- Per-line granularity
- Per-character granularity
- Font layout
- Click detection
- Simple wrapping
- Wrapping with indentation
- No wrapping
- Ellipsize
- Font rendering (using swash)
- Cache results
- Font hinting
- Ligatures
- Color emoji
- Text editing
- Performance improvements
- Text selection
- Can automatically recreate https://unicode.org/udhr/ without errors (see below)
- Bidirectional selection
- Copy/paste
- no_std support (with
default-features = false)- no_std font loading
- no_std shaping
- no_std layout
- no_std rendering
The UDHR (Universal Declaration of Human Rights) test involves taking the entire
set of UDHR translations (almost 500 languages), concatenating them as one file
(which ends up being 8 megabytes!), then via the editor-test example,
automatically simulating the entry of that file into cosmic-text per-character,
with the use of backspace and delete tested per character and per line. Then,
the final contents of the buffer is compared to the original file. All of the
106746 lines are correct.
License
Licensed under either of
- Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.