Draft
Conversation
Terminal programs that wrap other terminal programs have a simpler representation. Instead of using recursive types, which ultimately cannot be expressed without creating a concrete type, we ask the "syntax" to create a thunk that applies the effects, and pass that the inner program. See `design.md` for a fuller description. Update implementations accordingly. Update to Scala Native 0.5.10. Reading key presses is currently broken on MacOS, which I think traces back to the `read(timeout)` method, which in turn probably goes to the termios calls not working correctly.
- Calling read(duration) doesn't clear the input queue when changing the terminal settings. This is usually what we want, as this method is used to read multi-byte character sequences. This fixes a problem we observed on Scala Native - Add a few tests for the CLong termios variant. - Add a method to get special characters, used in testing. - A bit of cleanup
Ghostty sends newline when enter is pressed.
- UIs are modelled as effects on a `RenderContext` - Rendering is done via a cell buffer, which will allow double buffering and diffing in the future. - Very basic fixed size layout. - Fix `NativeTerminal` to support printing wide characters.
- Update scalafmt - Add scalafmt setting to rewrite to braceless style - Reformat
This prevents scalafmt reformatting these into Scala 3 style. Also reinstate AnsiCodes.scala, which got deleted somewhere along the way.
Support italic, underline, etc.
- Support characters that have a width or 0 or 2. This enables support for emojis and east Asian languages. - Add very basic styling support to allow use of extended styling - Update example to show new features
- Add method `renderDiff` that only renders the difference between two buffers. - Add tests for diffing
Column is the vertical counterpart to Row: it stacks children top to bottom, accumulating height and taking the max width. Includes layout tests for both Row and Column covering size accumulation, single-axis placement, multi-size children, and nested Row/Column combinations. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Newline characters were treated as width-1 glyphs, writing a literal \n into a buffer cell. At render time this emitted a terminal line-feed mid-row, shifting the cursor and causing subsequent cells to land on the wrong row — text after the first \n was invisible because the next row's render immediately overwrote it. putString now resets the column to x and advances the row on \n, matching the expected behaviour for multi-line text content. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Documents the UI module architecture and styling design decisions for persistence across machines and conversations. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Introduces ComponentStyle (border, borderStyle, background, padding) separate from the cell-level Style. Box now fills the interior with the background style and applies borderStyle to border characters. Text splits into box and content style parameters, using Box.innerRect to position content correctly regardless of padding. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This allows size to change dynamically, which in turn allows components to react to user input.
Introduces the capability-passing reactive model for interactive UIs: - Signal[A] / ReadSignal[A] for reactive state; set() schedules a re-render - EventContext owns signals and key handlers for a screen's lifetime - ComponentContext stub for future subtree re-render dependency tracking - AppContext combines ComponentContext, EventContext, and RenderContext into a single capability; Row/Column thread it through via AppContext.child - LeafContent[A] and AppContent[A] type aliases for component signatures - Text content changed to by-name (=> String) so it re-evaluates each frame - FullScreen.run implements the event loop: build tree once, render on signal change, dispatch keys to handlers, exit on stop() or EOF - Fix NativeTerminal.flush() flushing stdin instead of stdout
- Add Ansi codes to show and hide cursor - Wrap in effects and syntax - Use in FullScreen app to hide the cursor
This prevents lag when waiting to disambiguate ESC from an escape code.
Correct the signal API in the notes to match the current implementation, add AppContext documentation, and expand deferred work with focus model, dynamic layout, and more components as immediate priorities. Change the interactive demo quit key from Esc to q. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Add a TUI toolkit building on the basic Terminus terminal support.