- Add Focusable interface for components that need hardware cursor positioning
- Add CURSOR_MARKER (APC escape sequence) for marking cursor position in render output
- Editor and Input components implement Focusable and emit marker when focused
- TUI extracts cursor position from rendered output and positions hardware cursor
- Track hardwareCursorRow separately from cursorRow for differential rendering
- visibleWidth() and extractAnsiCode() now handle APC sequences
- Update overlay-test.ts example to demonstrate Focusable usage
- Add documentation for Focusable interface in docs/tui.md
Closes#719, closes#525
Adds overlay rendering capability to the TUI, enabling floating modal
components that render on top of existing content without clearing the screen.
- Add showOverlay(), hideOverlay(), hasOverlay() methods to TUI
- Implement ANSI-aware line compositing via extractSegments()
- Support overlay stack (multiple overlays, later on top)
- Add { overlay: true } option to ctx.ui.custom()
- Add overlay-test.ts example extension
Also fixes pre-existing bug where bash tool output cached visual lines
at fixed terminal width, causing crashes on terminal resize.
Co-authored-by: Nico Bailon <nico.bailon@gmail.com>
The initial render of a session, and any re-draws caused by terminal
resizing are noticeably slow, especially on conversations with 20+
turns and many tool calls.
From profiling with `bun --cpu-prof` (available since bun 1.3.2), the
majority of the rendering (90%) is spent on detection of emojis in the
string-width library, running the expensive `/\p{RGI_Emoji}$/v`
regular expression on every individual grapheme cluster in the entire
scrollback. I believe it essentially expands to a fixed search against
every possible emoji sequence, hence the amount of CPU time spent in it.
This change replaces the `stringWidth` from string-width with a
`graphemeWidth` function that performs a similar check, but avoids
running the `/\p{RGI_Emoji}$/v` regex for emoji detection unless it
contains codepoints that could be emojis.
The `visibleWidth` function also has two more optimisations:
- Short-circuits string length detection for strings that are entirely
printable ASCII characters
- Adds a cache for non-ASCII segments to avoid recomputing string length
when resizing
Strip all Unicode format characters (category Cf) before passing to
string-width. These are invisible control characters that crash
string-width but have no visible width anyway.
Closes#390
- Skip trailing whitespace before deleting word (readline behavior)
- Make word navigation grapheme-aware using Intl.Segmenter
- Add Ctrl+Left/Right and Alt+Left/Right word navigation to Input
- Accept full Unicode input while rejecting control characters (C0/C1/DEL)
- Extract shared utilities to utils.ts (getSegmenter, isWhitespaceChar, isPunctuationChar)
- Fix unsafe cast in Editor.forceFileAutocomplete with runtime type check
- Add comprehensive tests for word deletion and navigation
wrapTextWithAnsi() was processing each line independently after splitting
on newlines, losing ANSI state. When styled text contained embedded newlines
(e.g. from markdown paragraphs), subsequent lines would lose their styling.
Fixed by tracking ANSI state across lines and prepending active codes to
lines after the first.
Fixes#197
- ANSI codes now attach to next visible content, not trailing whitespace
- Rewrote AnsiCodeTracker to track individual attributes
- Line-end resets only turn off underline, preserving background colors
- Added vitest config to exclude node:test files
fixes#109
- Use truncateToWidth instead of substring in user-message-selector.ts
- Fix truncateToWidth to use Intl.Segmenter for proper grapheme handling
- Add tests for Unicode truncation behavior
- Fix line numbers showing incorrect values for edits far from file start
(e.g., 1,2,3 instead of 336,337,338). Skip count was added after displaying
lines instead of before.
- Rewrite splitIntoTokensWithAnsi in pi-tui to preserve whitespace as separate
tokens instead of discarding it. Wrapped lines now maintain proper alignment
and code indentation.
- Update mom README: rename title, remove em-dashes for cleaner prose
Fixed crash when rendering text containing emojis followed by long content.
The breakLongWord function was iterating over UTF-16 code units instead of
grapheme clusters, causing emojis (surrogate pairs) to be miscounted during
line wrapping. Now uses Intl.Segmenter to properly handle multi-codepoint
characters.
- Created shared wrapTextWithAnsi() function in utils.ts
- Handles word-based wrapping while preserving ANSI escape codes
- Properly tracks active ANSI codes across wrapped lines
- Supports multi-byte characters (emoji, surrogate pairs)
- Updated Markdown and Text components to use shared wrapping
- Removed duplicate wrapping logic (158 lines total)
Replace tabs with 3 spaces for consistent rendering and width calculation:
- Updated visibleWidth() to normalize tabs before measuring
- Updated Text and Markdown components to replace tabs when rendering
- Updated tool-execution display for read/write tools to replace tabs
This fixes background color rendering issues when displaying files with tab indentation.
- Added string-width library for proper terminal column width calculation
- Fixed wrapLine() to split by newlines before wrapping (like Text component)
- Fixed Loader interval leak by stopping before container removal
- Changed loader message from 'Loading...' to 'Working...'
