l0ng-aiandl0ng-ai 1f09a62568 fix(ui): give corner-filling children their own radius (#236) (#244)
* fix(ui): stop filled children squaring off rounded corners

The cursor-shape toggles (Block / Bar / Underline) reported in #236 look
rough because the selected segment's fill covers the whole corner of the
track it caps, and its outer edge is a hard, unantialiased vertical cut.
The track's own border arc is drawn correctly and antialiased — it just
floats *inside* that square, so the corner reads as a stair-step.

The controls were relying on `overflow_hidden` to shape their end
segments' fills to the track's rounding. It cannot do that.
`gpui::ContentMask` is a bare axis-aligned `Bounds`; `Style::overflow_mask`
builds it from the element's bounds shrunk by the border widths and drops
`corner_radii` entirely, and every shader applies it as a hard
`clip_distances < 0` discard. So the mask only ever cuts a square, and it
never antialiases the cut. A container's own corners come from somewhere
else — the quad shader's SDF, `saturate(0.5 - distance)` — which is why a
plain rounded card renders smooth while anything with a filled child in
its corner does not. That divergence is the whole bug, and the reporter's
screenshot shows both halves of it: the corner with the selected fill is
square, the corner without one is a clean arc.

The fill has to carry the radius itself, so it goes down the SDF path too.
It sits one border-width inside the track, so the concentric radius is
`outer - border`. `ui::rounding` states that rule once, with the
constants and the corner-assignment helpers, and unit-tests the
invariants (inset is strictly tighter than the outer radius, clamps at
zero, only the end segments cap the track).

Applied to every place a child paints a fill into a rounded corner:

* the segmented controls (the reported one, plus the others `segmented`
  serves),
* the −/value/+ steppers' hover fills — those glyph boxes also had to be
  pinned to the track's content height, because a padded auto-height box
  measures 31px against a 22px content box and its rounded corner would
  land 4½px outside the visible strip,
* the theme picker's flush-mounted previews,
* the diff overlay's card headers and the row that closes a card.

Not reproducible locally: this is a rendering-geometry defect, not a
platform one, but it is most visible at a device pixel ratio of 1, where
the clip's hard edge is a whole physical pixel. Verified by reading the
gpui mask/shader source and the reporter's screenshot pixel by pixel, and
by the geometry tests; the on-screen result is left for visual
acceptance.

Refs #236

* no-mistakes(review): round diff card header when body is empty

* no-mistakes(document): point Unreleased changelog link at v26.7.6

* no-mistakes(document): untrack AGENTS.md per gitignore dev-tool convention

---------

Co-authored-by: l0ng-ai <24760907+l0ng-ai@users.noreply.github.com>
2026-07-29 00:34:40 +08:00

tty7

tty7

A terminal workbench: shells, sessions, SSH, coding agents.

Pure Rust · GPU rendering on Zed's gpui · VT core from Alacritty


CI Version License Discord

English · 简体中文

Why

  • Fast — ~2× the throughput of Alacritty, Ghostty, or Kitty (benchmarks)
  • Sessions persist — quit or reboot; your shells keep running, no tmux
  • Editor-grade input — completion, syntax highlighting, history search built in; zero config for zsh, bash, fish, PowerShell
  • Agent-aware — recognizes Claude Code & co. in a pane: status, notifications, session resume

Install

Native builds for each platform on Releases:

macOS …-macos-arm64.dmg · …-x86_64.dmg drag into Applications
Windows …-setup.exe · portable ….zip
Linux …-x86_64.AppImage chmod +x and run — x11/wayland libs bundled

What's inside

Input ghost suggestions from history · explained tab completion · syntax highlighting · multi-line editing · click places the caret · ⌃ R fuzzy history
Window tabs & splits · ⌘ P palette · ⌘ F scrollback search · nine themes · IME
Coding agents per-pane agent detection (~17 CLIs): status dot, notifications, branch + diff, resume after reboot, tray icon that signals "needs your input"
SSH native russh stack: profiles with keychain secrets, SFTP panel, port forwarding, jump hosts

Details for every row: docs/features.md. Keybindings: ⌘ , opens Settings — browse and remap everything, tmux preset included (full list).

Benchmarks

Same machine, same day, same 155×40 grid — Apple M1 Pro, macOS 26.3.1, five-run averages (2026-07-04):

tty7 Alacritty Ghostty Kitty
Plaintext IO — 11 MB cat (lower = better) 95 ms 239 ms 179 ms 185 ms
DOOM-fire frame rate (higher = better) 888 fps 485 fps 552 fps 617 fps
Cold-launch memory 116 MB¹ 105 MB 128 MB 130 MB

¹ GUI 105 MB + the persistent daemon 11 MB.

Methodology and one-command reproduction: scripts/bench/.


S
Description
A terminal workbench in pure Rust: shells, persistent sessions, SSH, coding agents. GPU-rendered on Zed's gpui, VT core from Alacritty.
Readme Apache-2.0
34 MiB
Languages
Rust 99.1%
Shell 0.5%
PowerShell 0.2%
Inno Setup 0.1%