hermes-agent/ui-tui/src/config/env.ts
adybag14-cyber 7c2ff742a4 fix(tui): termux-gate scrollback preservation, touch-friendly defaults
Adds a Termux runtime detection helper and gates three TUI defaults on it:

- Skip the startup scrollback clear on Termux so users can review/copy
  earlier output after reopening the app. Desktop keeps the existing
  \x1b[2J\x1b[H\x1b[3J slate (AlternateScreen takes over there anyway).
- Default INLINE_MODE on under Termux: primary-buffer rendering makes
  long-thread review and copy/paste much less fragile when users
  background/foreground the app. Override with HERMES_TUI_INLINE=0/1.
- Default mouse tracking off under Termux so touch selection isn't
  intercepted by terminal mouse protocols. Explicit override via
  HERMES_TUI_MOUSE_TRACKING=0/1; legacy HERMES_TUI_DISABLE_MOUSE still
  works on desktop.

Detection is purely env-based (TERMUX_VERSION or PREFIX path) with an
explicit opt-out HERMES_TUI_TERMUX_MODE=0 for debugging. Non-Termux
platforms keep every existing default.

Co-authored-by: adybag14-cyber <252811164+adybag14-cyber@users.noreply.github.com>
2026-05-19 12:49:23 -07:00

52 lines
1.9 KiB
TypeScript

import { isTermuxTuiMode } from '../lib/termux.js'
const truthy = (v?: string) => /^(?:1|true|yes|on)$/i.test((v ?? '').trim())
const falsy = (v?: string) => /^(?:0|false|no|off)$/i.test((v ?? '').trim())
const parseToggle = (v?: string): boolean | null => {
const raw = (v ?? '').trim()
if (!raw) {
return null
}
if (truthy(raw)) {
return true
}
if (falsy(raw)) {
return false
}
return null
}
export const TERMUX_TUI_MODE = isTermuxTuiMode()
export const STARTUP_RESUME_ID = (process.env.HERMES_TUI_RESUME ?? '').trim()
export const STARTUP_QUERY = (process.env.HERMES_TUI_QUERY ?? '').trim()
export const STARTUP_IMAGE = (process.env.HERMES_TUI_IMAGE ?? '').trim()
const mouseTrackingOverride = parseToggle(process.env.HERMES_TUI_MOUSE_TRACKING)
const mouseTrackingDisabledLegacy = truthy(process.env.HERMES_TUI_DISABLE_MOUSE)
// Mobile selection UX: on Termux default mouse tracking OFF so touch selection
// is less likely to be intercepted by terminal mouse protocols. Desktop keeps
// prior behavior unless explicitly overridden.
export const MOUSE_TRACKING =
mouseTrackingOverride ?? (TERMUX_TUI_MODE ? false : !mouseTrackingDisabledLegacy)
export const NO_CONFIRM_DESTRUCTIVE = truthy(process.env.HERMES_TUI_NO_CONFIRM)
const inlineOverride = parseToggle(process.env.HERMES_TUI_INLINE)
// Skip AlternateScreen — TUI renders into the primary buffer so the host
// terminal's native scrollback captures whatever scrolls off the top.
//
// On Termux we default this on: users often background/foreground the app,
// and primary-buffer rendering makes long-thread review and copy/paste much
// less fragile. Override explicitly with HERMES_TUI_INLINE=0/1.
export const INLINE_MODE = inlineOverride ?? TERMUX_TUI_MODE
// Live FPS counter overlay, fed by ink's onFrame (real render rate, not a
// synthetic timer).
export const SHOW_FPS = truthy(process.env.HERMES_TUI_FPS)