Max Brunsfeld
abc6b3b357
## Summary Add browser-font fallback to GPUI on the web, so applications can render emoji using the user’s local fonts without bundling an emoji font. GPUI continues to shape text with Cosmic Text using application-provided fonts. When those fonts cannot supply an eligible grapheme or its requested emoji presentation, the web backend measures and rasterizes the complete grapheme using Canvas 2D, then caches and paints the result through GPUI’s existing glyph atlas. ### Configurable fallback - **Emoji-only by default**, including supported variation-selector, skin-tone, flag, keycap, and ZWJ sequences. - Applications can opt into **CJK fallback** for a conservative subset of horizontal Han, kana, and modern Hangul text. - Applications can disable Canvas fallback entirely. CJK fallback renders graphemes independently. It prioritizes readable text over full fidelity to contextual spacing and font features. Browser font coverage and appearance depend on the user’s environment. ### Web input and application lifecycle - Fix text insertion that arrives without a corresponding keyboard event, allowing emoji input through the browser’s text-input path. - Keep the GPUI application alive after `Application::run` returns on WebAssembly. Browser startup is asynchronous; releasing the application after the startup callback previously caused the window to disappear. ### Browser example gallery Make the existing GPUI examples available from a single development server, with separate routes for hello world, styled text, text layout, wrapping, input, and the prime sieve demo. The gallery supports direct links and reloads, loads only the selected example, and provides a simple way to exercise font fallback and text input. ## Validation - Native unit tests cover fallback eligibility and presentation, policy defaults, glyph-cache reuse, and in-place glyph-run replacement. - All six gallery binaries pass WASM compilation checks. - Browser smoke coverage exercises emoji insertion, whole-grapheme Canvas rendering, cache reuse, and deletion. - Manually exercised the gallery and fallback rendering in Chrome. Release Notes: - N/A
Zed
Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
Installation
On macOS, Linux, and Windows you can download Zed directly or install Zed via your local package manager (macOS/Linux/Windows).
Other platforms are not yet available:
- Web (tracking discussion)
Developing Zed
Contributing
See CONTRIBUTING.md for ways you can contribute to Zed.
Also... we're hiring! Check out our jobs page for open roles.
Licensing
Zed source code is licensed primarily under GPL-3.0-or-later, with Apache-2.0 components where marked.
License information for third party dependencies must be correctly provided for CI to pass.
We use cargo-about to automatically comply with open source licenses. If CI is failing, check the following:
- Is it showing a
no license specifiederror for a crate you've created? If so, addpublish = falseunder[package]in your crate's Cargo.toml. - Is the error
failed to satisfy license requirementsfor a dependency? If so, first determine what license the project has and whether this system is sufficient to comply with this license's requirements. If you're unsure, ask a lawyer. Once you've verified that this system is acceptable add the license's SPDX identifier to theacceptedarray inscript/licenses/zed-licenses.toml. - Is
cargo-aboutunable to find the license for a dependency? If so, add a clarification field at the end ofscript/licenses/zed-licenses.toml, as specified in the cargo-about book.
Sponsorship
Zed is developed by Zed Industries, Inc., a for-profit company.
If you’d like to financially support the project, you can do so via GitHub Sponsors. Sponsorships go directly to Zed Industries and are used as general company revenue. There are no perks or entitlements associated with sponsorship.