bare-operating-system/packages/bare-os-seeder/kernel/lib/bare-os/tui.js

(function (ctx) {
"use strict";
/* src/00-prelude.js */
/** Bare OS TUI concat prelude. Guest scripts receive this via ctx only. */
var BARE_TUI_VERSION = '1.3.0'
var bareTuiSessions = []
var bareTuiNextWidgetId = 1

/* src/ansi/codes.js */
/** CSI / SGR / DEC private-mode sequences for the guest TUI. */

var BARE_TUI_ESC = '\x1b'
var BARE_TUI_CSI = '\x1b['

function bareTuiSgr(n) {
  return BARE_TUI_CSI + String(n) + 'm'
}

var bareTuiAnsi = {
  esc: BARE_TUI_ESC,
  csi: BARE_TUI_CSI,
  reset: bareTuiSgr(0),
  cursorHide: BARE_TUI_CSI + '?25l',
  cursorShow: BARE_TUI_CSI + '?25h',
  home: BARE_TUI_CSI + 'H',
  eraseDisplay: BARE_TUI_CSI + '2J',
  eraseDisplayEnd: BARE_TUI_CSI + 'J',
  eraseScrollback: BARE_TUI_CSI + '3J',
  eraseLine: BARE_TUI_CSI + '2K',
  eraseLineEnd: BARE_TUI_CSI + 'K',
  enterAltScreen: BARE_TUI_CSI + '?1049h',
  leaveAltScreen: BARE_TUI_CSI + '?1049l',
  enableMouseBasic: BARE_TUI_CSI + '?1000h' + BARE_TUI_CSI + '?1006h',
  enableMouseDrag:
    BARE_TUI_CSI + '?1000h' + BARE_TUI_CSI + '?1002h' + BARE_TUI_CSI + '?1006h',
  enableMouseAll:
    BARE_TUI_CSI + '?1000h' + BARE_TUI_CSI + '?1003h' + BARE_TUI_CSI + '?1006h',
  disableMouse:
    BARE_TUI_CSI +
    '?1006l' +
    BARE_TUI_CSI +
    '?1003l' +
    BARE_TUI_CSI +
    '?1002l' +
    BARE_TUI_CSI +
    '?1000l',
  enableBracketPaste: BARE_TUI_CSI + '?2004h',
  disableBracketPaste: BARE_TUI_CSI + '?2004l',
  enableFocus: BARE_TUI_CSI + '?1004h',
  disableFocus: BARE_TUI_CSI + '?1004l',
  syncOutputBegin: BARE_TUI_CSI + '?2026h',
  syncOutputEnd: BARE_TUI_CSI + '?2026l',
  modifierReverse: bareTuiSgr(7),
  modifierNotReverse: bareTuiSgr(27),
  modifierDim: bareTuiSgr(2),
  cursorTo: function (row, col) {
    var r = (row | 0) + 1
    var c = (col | 0) + 1
    if (r < 1) r = 1
    if (c < 1) c = 1
    return BARE_TUI_CSI + r + ';' + c + 'H'
  },
  cursorUp: function (n) {
    return BARE_TUI_CSI + (n == null ? 1 : n | 0) + 'A'
  },
  cursorDown: function (n) {
    return BARE_TUI_CSI + (n == null ? 1 : n | 0) + 'B'
  },
  cursorForward: function (n) {
    return BARE_TUI_CSI + (n == null ? 1 : n | 0) + 'C'
  },
  cursorBack: function (n) {
    return BARE_TUI_CSI + (n == null ? 1 : n | 0) + 'D'
  },
  sgr: bareTuiSgr,
  fg256: function (n) {
    return BARE_TUI_CSI + '38;5;' + (n | 0) + 'm'
  },
  bg256: function (n) {
    return BARE_TUI_CSI + '48;5;' + (n | 0) + 'm'
  },
  fgRgb: function (r, g, b) {
    return (
      BARE_TUI_CSI + '38;2;' + (r | 0) + ';' + (g | 0) + ';' + (b | 0) + 'm'
    )
  },
  bgRgb: function (r, g, b) {
    return (
      BARE_TUI_CSI + '48;2;' + (r | 0) + ';' + (g | 0) + ';' + (b | 0) + 'm'
    )
  }
}

/* src/input/decoder.js */
/** Byte-queue key / mouse / paste decoder. Produces TEA-style messages. */

function bareTuiUtf8Decode(bytes) {
  try {
    if (typeof TextDecoder !== 'undefined') {
      return new TextDecoder('utf-8', { fatal: false }).decode(
        new Uint8Array(bytes)
      )
    }
  } catch (e) {
    /* fall through */
  }
  var s = ''
  for (var i = 0; i < bytes.length; i++) s += String.fromCharCode(bytes[i])
  return s
}

function bareTuiUtf8TrailCount(b1) {
  if (b1 >= 0xc0 && b1 < 0xe0) return 1
  if (b1 >= 0xe0 && b1 < 0xf0) return 2
  if (b1 >= 0xf0) return 3
  return 0
}

function bareTuiKeyToString() {
  var parts = []
  if (this.ctrl) parts.push('ctrl')
  if (this.meta) parts.push('alt')
  if (this.shift && this.name && this.name.length > 1) parts.push('shift')
  parts.push(this.name === 'return' ? 'enter' : this.name)
  return parts.join('+')
}

function bareTuiKeyIs() {
  var str = this.toString()
  for (var i = 0; i < arguments.length; i++) {
    var chord = arguments[i]
    if (chord === 'esc') chord = 'escape'
    if (chord === str || chord === this.name) return true
    if (chord === 'enter' && (str === 'enter' || this.name === 'return'))
      return true
  }
  return false
}

function bareTuiMakeKey(name, seq, ctrl, meta, shift) {
  return {
    type: 'key',
    name: name,
    sequence: seq || '',
    ctrl: !!ctrl,
    meta: !!meta,
    shift: !!shift,
    toString: bareTuiKeyToString,
    is: bareTuiKeyIs
  }
}

function bareTuiKeyMatches(msg) {
  if (!msg || msg.type !== 'key' || typeof msg.is !== 'function') return false
  var chords = []
  for (var i = 1; i < arguments.length; i++) {
    var item = arguments[i]
    if (item && typeof item === 'object' && item.keys && item.keys.length) {
      for (var k = 0; k < item.keys.length; k++) chords.push(item.keys[k])
    } else {
      chords.push(item)
    }
  }
  return msg.is.apply(msg, chords)
}

function bareTuiKeyBinding(opts) {
  var o = opts || {}
  var keys = o.keys
  if (!keys) keys = []
  if (typeof keys === 'string') keys = [keys]
  return { keys: keys.slice(), help: o.help || null }
}

var BARE_TUI_CSI_NAMES = {
  A: 'up',
  B: 'down',
  C: 'right',
  D: 'left',
  H: 'home',
  F: 'end',
  Z: 'tab',
  P: 'f1',
  Q: 'f2',
  R: 'f3',
  S: 'f4'
}

var BARE_TUI_TILDE_NAMES = {
  1: 'home',
  2: 'insert',
  3: 'delete',
  4: 'end',
  5: 'pageup',
  6: 'pagedown',
  7: 'home',
  8: 'end',
  11: 'f1',
  12: 'f2',
  13: 'f3',
  14: 'f4',
  15: 'f5',
  17: 'f6',
  18: 'f7',
  19: 'f8',
  20: 'f9',
  21: 'f10',
  23: 'f11',
  24: 'f12'
}

function bareTuiParseCsiPayload(payload) {
  if (!payload) return null
  if (payload === 'I') return { type: 'focus', gained: true }
  if (payload === 'O') return { type: 'focus', gained: false }

  if (payload.charAt(0) === '<') {
    var m = /^<(\d+);(\d+);(\d+)([Mm])$/.exec(payload)
    if (!m) return { type: 'unknown', sequence: payload }
    var btn = parseInt(m[1], 10)
    var x = parseInt(m[2], 10)
    var y = parseInt(m[3], 10)
    var release = m[4] === 'm'
    var motion = (btn & 32) !== 0
    var wheel = (btn & 64) !== 0
    var code = btn & 3
    var button =
      code === 0
        ? 'left'
        : code === 1
          ? 'middle'
          : code === 2
            ? 'right'
            : 'none'
    var action = 'press'
    if (wheel) action = (btn & 1) === 0 ? 'scrollup' : 'scrolldown'
    else if (release) action = 'release'
    else if (motion) action = 'drag'
    return {
      type: 'mouse',
      action: action,
      button: button,
      x: x,
      y: y,
      ctrl: (btn & 16) !== 0,
      meta: (btn & 8) !== 0,
      shift: (btn & 4) !== 0
    }
  }

  var last = payload.charAt(payload.length - 1)
  var body = payload.slice(0, payload.length - 1)
  var mods = 1
  var num = ''
  var semi = body.indexOf(';')
  if (last === '~') {
    if (semi >= 0) {
      num = body.slice(0, semi)
      mods = parseInt(body.slice(semi + 1), 10) || 1
    } else {
      num = body
    }
    if (num === '200') return { type: 'paste-start' }
    if (num === '201') return { type: 'paste-end' }
    var tname = BARE_TUI_TILDE_NAMES[num]
    if (!tname) return { type: 'unknown', sequence: payload }
    return bareTuiMakeKey(
      tname,
      payload,
      !!((mods - 1) & 4),
      !!((mods - 1) & 2),
      !!((mods - 1) & 1)
    )
  }
  var letter = last
  if (semi >= 0) {
    var parts = body.split(';')
    if (parts.length >= 2) mods = parseInt(parts[1], 10) || 1
  }
  var lname = BARE_TUI_CSI_NAMES[letter]
  if (!lname) return { type: 'unknown', sequence: payload }
  var shift = !!((mods - 1) & 1)
  if (letter === 'Z') shift = true
  return bareTuiMakeKey(
    lname,
    payload,
    !!((mods - 1) & 4),
    !!((mods - 1) & 2),
    shift
  )
}

function bareTuiTryConsume(q) {
  if (!q.length) return null
  var b1 = q[0]

  if (b1 === 27) {
    if (q.length < 2) return { type: 'incomplete' }
    var b2 = q[1]
    if (b2 === 91) {
      var i = 2
      while (i < q.length) {
        var b = q[i]
        if (b >= 0x40 && b <= 0x7e) {
          var seq = String.fromCharCode.apply(null, q.slice(2, i + 1))
          q.splice(0, i + 1)
          return bareTuiParseCsiPayload(seq)
        }
        i++
      }
      return { type: 'incomplete' }
    }
    if (b2 === 79) {
      if (q.length < 3) return { type: 'incomplete' }
      var b3 = q[2]
      q.splice(0, 3)
      var ss3 = String.fromCharCode(b3)
      var ssName = {
        A: 'up',
        B: 'down',
        C: 'right',
        D: 'left',
        H: 'home',
        F: 'end',
        P: 'f1',
        Q: 'f2',
        R: 'f3',
        S: 'f4'
      }[ss3]
      if (!ssName) return { type: 'unknown', sequence: 'O' + ss3 }
      return bareTuiMakeKey(ssName, 'O' + ss3, false, false, false)
    }
    q.splice(0, 2)
    if (b2 === 27) return bareTuiMakeKey('escape', '\x1b', false, false, false)
    if (b2 >= 1 && b2 <= 26) {
      return bareTuiMakeKey(
        String.fromCharCode(96 + b2),
        String.fromCharCode(b2),
        true,
        true,
        false
      )
    }
    return bareTuiMakeKey(
      String.fromCharCode(b2),
      String.fromCharCode(b2),
      false,
      true,
      false
    )
  }

  if (b1 === 3) {
    q.shift()
    return bareTuiMakeKey('c', '\x03', true, false, false)
  }
  if (b1 === 4) {
    q.shift()
    return bareTuiMakeKey('d', '\x04', true, false, false)
  }
  if (b1 === 8 || b1 === 127) {
    q.shift()
    return bareTuiMakeKey(
      'backspace',
      String.fromCharCode(b1),
      false,
      false,
      false
    )
  }
  if (b1 === 13 || b1 === 10) {
    q.shift()
    return bareTuiMakeKey('enter', String.fromCharCode(b1), false, false, false)
  }
  if (b1 === 9) {
    q.shift()
    return bareTuiMakeKey('tab', '\t', false, false, false)
  }
  if (b1 === 32) {
    q.shift()
    return bareTuiMakeKey('space', ' ', false, false, false)
  }
  if (b1 === 27) {
    q.shift()
    return bareTuiMakeKey('escape', '\x1b', false, false, false)
  }
  if (b1 < 32) {
    q.shift()
    if (b1 === 0) return bareTuiMakeKey('space', '\x00', true, false, false)
    return bareTuiMakeKey(
      String.fromCharCode(96 + b1),
      String.fromCharCode(b1),
      true,
      false,
      false
    )
  }

  if (b1 >= 0xc0) {
    var trail = bareTuiUtf8TrailCount(b1)
    if (q.length < trail + 1) return { type: 'incomplete' }
    var ub = q.splice(0, trail + 1)
    var ch = bareTuiUtf8Decode(ub)
    return bareTuiMakeKey(ch, ch, false, false, false)
  }

  q.shift()
  var one = String.fromCharCode(b1)
  return bareTuiMakeKey(one, one, false, false, false)
}

function bareTuiCreateDecoder() {
  var q = []
  var paste = null
  return {
    push: function (chunk) {
      var i
      if (chunk == null) return
      if (typeof chunk === 'string') {
        for (i = 0; i < chunk.length; ) {
          var cp = chunk.codePointAt(i)
          i += cp > 0xffff ? 2 : 1
          if (cp < 0x80) q.push(cp)
          else if (cp < 0x800) {
            q.push(0xc0 | (cp >> 6))
            q.push(0x80 | (cp & 63))
          } else if (cp < 0x10000) {
            q.push(0xe0 | (cp >> 12))
            q.push(0x80 | ((cp >> 6) & 63))
            q.push(0x80 | (cp & 63))
          } else {
            q.push(0xf0 | (cp >> 18))
            q.push(0x80 | ((cp >> 12) & 63))
            q.push(0x80 | ((cp >> 6) & 63))
            q.push(0x80 | (cp & 63))
          }
        }
        return
      }
      if (chunk instanceof Uint8Array || Array.isArray(chunk)) {
        for (i = 0; i < chunk.length; i++) q.push(chunk[i] & 255)
        return
      }
      if (typeof chunk === 'number') q.push(chunk & 255)
    },
    flushEscape: function () {
      if (q.length === 1 && q[0] === 27) {
        q.shift()
        return bareTuiMakeKey('escape', '\x1b', false, false, false)
      }
      return null
    },
    take: function () {
      var out = []
      for (;;) {
        if (!q.length) break
        if (paste !== null) {
          var end = -1
          var j
          for (j = 0; j <= q.length - 6; j++) {
            if (
              q[j] === 27 &&
              q[j + 1] === 91 &&
              q[j + 2] === 50 &&
              q[j + 3] === 48 &&
              q[j + 4] === 49 &&
              q[j + 5] === 126
            ) {
              end = j
              break
            }
          }
          if (end < 0) break
          var inner = q.splice(0, end)
          q.splice(0, 6)
          paste = null
          out.push({ type: 'paste', text: bareTuiUtf8Decode(inner) })
          continue
        }
        var ev = bareTuiTryConsume(q)
        if (!ev || ev.type === 'incomplete') break
        if (ev.type === 'paste-start') {
          paste = []
          continue
        }
        if (ev.type === 'paste-end') continue
        out.push(ev)
      }
      return out
    },
    pending: function () {
      return q.length
    }
  }
}

function bareTuiDecodeBytes(chunk) {
  var d = bareTuiCreateDecoder()
  d.push(chunk)
  var evs = d.take()
  var esc = d.flushEscape()
  if (esc) evs.push(esc)
  return evs
}

/* src/adapter/session.js */
/** Session adapter: Fish suspend, raw mode, stream resolve. Widgets never call this. */

function bareTuiEnv(ctx) {
  return ctx && ctx.env && typeof ctx.env === 'object' ? ctx.env : {}
}

function bareTuiGetSession(ctx) {
  var i
  for (i = 0; i < bareTuiSessions.length; i++) {
    if (bareTuiSessions[i].ctx === ctx) return bareTuiSessions[i]
  }
  var s = {
    ctx: ctx,
    depth: 0,
    didSuspend: false,
    didRaw: false,
    stdin: null
  }
  bareTuiSessions.push(s)
  return s
}

function bareTuiResolveStdin(ctx, opts) {
  var o = opts || {}
  if (o.input) return o.input
  if (ctx && ctx.replStdin) return ctx.replStdin
  if (ctx && ctx.stdin) return ctx.stdin
  var p = typeof globalThis !== 'undefined' ? globalThis.process : null
  return p && p.stdin ? p.stdin : null
}

function bareTuiResolveStdout(ctx, opts) {
  var o = opts || {}
  if (o.output) return o.output
  if (ctx && ctx.replStdout) return ctx.replStdout
  if (ctx && ctx.stdout) return ctx.stdout
  var p = typeof globalThis !== 'undefined' ? globalThis.process : null
  return p && p.stdout ? p.stdout : null
}

function bareTuiWriteRaw(ctx, opts, chunk) {
  var out = bareTuiResolveStdout(ctx, opts)
  var s = typeof chunk === 'string' ? chunk : String(chunk)
  if (out && typeof out.write === 'function') {
    out.write(s)
    return
  }
  if (ctx && typeof ctx.writeScreen === 'function') ctx.writeScreen(s)
}

function bareTuiIsTTY(ctx, opts) {
  var o = opts || {}
  if (o.isTTY === true) return true
  if (o.isTTY === false) return false
  if (ctx && ctx.bareOsStdoutCaptured) return false
  var stdin = bareTuiResolveStdin(ctx, o)
  var stdout = bareTuiResolveStdout(ctx, o)
  var inTty = !!(stdin && stdin.isTTY)
  var outTty = !!(stdout && stdout.isTTY)
  return inTty || outTty
}

function bareTuiSize(ctx, opts) {
  var o = opts || {}
  if (o.width > 0 && o.height > 0) {
    return { width: o.width | 0, height: o.height | 0 }
  }
  var stdout = bareTuiResolveStdout(ctx, o)
  var env = bareTuiEnv(ctx)
  var w =
    (stdout && stdout.columns) ||
    parseInt(env.COLUMNS || '', 10) ||
    o.width ||
    80
  var h =
    (stdout && stdout.rows) || parseInt(env.LINES || '', 10) || o.height || 24
  if (!isFinite(w) || w < 1) w = 80
  if (!isFinite(h) || h < 1) h = 24
  return { width: w | 0, height: h | 0 }
}

function bareTuiNoAltScreen(ctx, opts) {
  var o = opts || {}
  if (o.altScreen === false) return true
  var env = bareTuiEnv(ctx)
  var v = env.BARE_OS_TUI_NO_ALTSCREEN
  return v != null && String(v) !== ''
}

function bareTuiAcquire(ctx, opts) {
  var sess = bareTuiGetSession(ctx)
  sess.depth++
  if (sess.depth !== 1) return sess
  if (ctx && typeof ctx.suspendReplForSubprocess === 'function') {
    ctx.suspendReplForSubprocess()
    sess.didSuspend = true
  }
  var stdin = bareTuiResolveStdin(ctx, opts)
  sess.stdin = stdin
  if (stdin && typeof stdin.setRawMode === 'function') {
    try {
      stdin.setRawMode(true)
      sess.didRaw = true
    } catch (e) {
      sess.didRaw = false
    }
  }
  if (stdin && typeof stdin.resume === 'function') {
    try {
      stdin.resume()
    } catch (e2) {
      /* ignore */
    }
  }
  return sess
}

function bareTuiRelease(ctx, opts) {
  var sess = bareTuiGetSession(ctx)
  if (sess.depth < 1) return sess
  sess.depth--
  if (sess.depth !== 0) return sess
  var stdin = sess.stdin || bareTuiResolveStdin(ctx, opts)
  if (sess.didRaw && stdin && typeof stdin.setRawMode === 'function') {
    try {
      stdin.setRawMode(false)
    } catch (e) {
      /* ignore */
    }
  }
  sess.didRaw = false
  if (
    sess.didSuspend &&
    ctx &&
    typeof ctx.resumeReplAfterSubprocess === 'function'
  ) {
    try {
      ctx.resumeReplAfterSubprocess()
    } catch (e2) {
      /* ignore */
    }
  }
  sess.didSuspend = false
  sess.stdin = null
  return sess
}

async function bareTuiWithSession(ctx, fn, opts) {
  bareTuiAcquire(ctx, opts)
  var entered = false
  try {
    bareTuiScreenEnter(ctx, opts)
    entered = true
    return await fn()
  } finally {
    if (entered) {
      try {
        bareTuiScreenLeave(ctx, opts)
      } catch (e) {
        /* ignore */
      }
    }
    bareTuiRelease(ctx, opts)
  }
}

/* src/screen/screen.js */
/** Alternate-screen / cursor / mouse / paste enter-leave. Always pair with adapter. */

function bareTuiMouseMode(opts) {
  var m = opts && opts.mouse
  if (m === true || m === 'basic') return 'basic'
  if (m === 'drag' || m === 'motion') return 'drag'
  if (m === 'all') return 'all'
  return null
}

function bareTuiScreenEnter(ctx, opts) {
  var o = opts || {}
  var parts = []
  if (!bareTuiNoAltScreen(ctx, o)) parts.push(bareTuiAnsi.enterAltScreen)
  else parts.push(bareTuiAnsi.home + bareTuiAnsi.eraseDisplay)
  parts.push(bareTuiAnsi.cursorHide)
  parts.push(bareTuiAnsi.home)
  if (o.bracketedPaste !== false) parts.push(bareTuiAnsi.enableBracketPaste)
  if (o.focus) parts.push(bareTuiAnsi.enableFocus)
  var mouse = bareTuiMouseMode(o)
  if (mouse === 'basic') parts.push(bareTuiAnsi.enableMouseBasic)
  else if (mouse === 'drag') parts.push(bareTuiAnsi.enableMouseDrag)
  else if (mouse === 'all') parts.push(bareTuiAnsi.enableMouseAll)
  bareTuiWriteRaw(ctx, o, parts.join(''))
}

function bareTuiScreenLeave(ctx, opts) {
  var o = opts || {}
  var parts = []
  parts.push(bareTuiAnsi.disableMouse)
  parts.push(bareTuiAnsi.disableFocus)
  parts.push(bareTuiAnsi.disableBracketPaste)
  parts.push(bareTuiAnsi.cursorShow)
  parts.push(bareTuiAnsi.reset)
  if (!bareTuiNoAltScreen(ctx, o)) parts.push(bareTuiAnsi.leaveAltScreen)
  bareTuiWriteRaw(ctx, o, parts.join(''))
}

/* src/theme/theme.js */
/** Resolve BARE_OS_THEME / BARE_OS_COLOR_* / NO_COLOR into TUI tokens. */

var BARE_TUI_THEME_FALLBACK = {
  default: {
    accent: 'cyan',
    muted: 'gray',
    error: 'red',
    ok: 'green',
    border: 'blue'
  },
  nord: {
    accent: 'cyan',
    muted: 'gray',
    error: 'red',
    ok: 'green',
    border: 'blue'
  },
  dracula: {
    accent: 'magenta',
    muted: 'gray',
    error: 'red',
    ok: 'green',
    border: 'magenta'
  },
  solarized_dark: {
    accent: 'blue',
    muted: 'gray',
    error: 'red',
    ok: 'green',
    border: 'cyan'
  },
  gruvbox_dark: {
    accent: 'yellow',
    muted: 'gray',
    error: 'red',
    ok: 'green',
    border: 'yellow'
  },
  catppuccin_mocha: {
    accent: 'blue',
    muted: 'gray',
    error: 'red',
    ok: 'green',
    border: 'magenta'
  },
  tokyo_night: {
    accent: 'blue',
    muted: 'gray',
    error: 'red',
    ok: 'green',
    border: 'blue'
  },
  github_dark: {
    accent: 'cyan',
    muted: 'gray',
    error: 'red',
    ok: 'green',
    border: 'blue'
  }
}

function bareTuiColorDepth(env) {
  var raw = env && env.BARE_OS_COLOR_DEPTH
  var d = raw == null ? '' : String(raw).toLowerCase()
  if (d === '16' || d === '8' || d === 'ansi') return '16'
  if (d === '256' || d === '8bit') return '256'
  return 'truecolor'
}

function bareTuiNoColor(env) {
  if (!env) return false
  if (env.NO_COLOR != null && String(env.NO_COLOR) !== '') return true
  if (String(env.TERM || '').toLowerCase() === 'dumb') return true
  return false
}

function bareTuiThemeName(env, opts) {
  var o = opts || {}
  if (o.theme && typeof o.theme === 'string') return String(o.theme)
  var e = env || {}
  var raw = e.BARE_OS_THEME
  var name = raw == null || raw === '' ? 'default' : String(raw)
  return name.toLowerCase().trim().replace(/\s+/g, '_')
}

function bareTuiEnvColor(env, short) {
  if (!env) return ''
  var key = 'BARE_OS_COLOR_' + String(short).toUpperCase()
  var v = env[key]
  return v == null ? '' : String(v)
}

function bareTuiResolveTheme(ctx, opts) {
  var env = bareTuiEnv(ctx)
  var name = bareTuiThemeName(env, opts)
  var fb = BARE_TUI_THEME_FALLBACK[name] || BARE_TUI_THEME_FALLBACK.default
  var noColor = bareTuiNoColor(env)
  return {
    name: name,
    noColor: noColor,
    depth: bareTuiColorDepth(env),
    tokens: {
      accent: bareTuiEnvColor(env, 'command') || fb.accent,
      muted: bareTuiEnvColor(env, 'ghost') || fb.muted,
      error: bareTuiEnvColor(env, 'envunset') || fb.error,
      ok: bareTuiEnvColor(env, 'prompt') || fb.ok,
      border: fb.border,
      path: bareTuiEnvColor(env, 'path') || 'yellow',
      search: bareTuiEnvColor(env, 'search') || fb.accent,
      status: bareTuiEnvColor(env, 'prompt') || fb.ok
    }
  }
}

/* src/layout/style.js */
/** Lip Gloss–style chainable style + ANSI-aware width. */

var BARE_TUI_ANSI_RE = /\x1b\[[0-9;?]*[A-Za-z]/g
var BARE_TUI_ANSI_STICKY = /\x1b\[[0-9;?]*[A-Za-z]/y

function bareTuiStripAnsi(str) {
  return String(str).replace(BARE_TUI_ANSI_RE, '')
}

function bareTuiIsZeroWidth(cp) {
  return (
    (cp >= 0x0300 && cp <= 0x036f) ||
    (cp >= 0x1ab0 && cp <= 0x1aff) ||
    (cp >= 0x1dc0 && cp <= 0x1dff) ||
    (cp >= 0x20d0 && cp <= 0x20ff) ||
    (cp >= 0xfe20 && cp <= 0xfe2f) ||
    cp === 0x200b ||
    (cp >= 0x200c && cp <= 0x200f) ||
    cp === 0xfeff
  )
}

function bareTuiIsWide(cp) {
  return (
    (cp >= 0x1100 && cp <= 0x115f) ||
    (cp >= 0x2e80 && cp <= 0x303e) ||
    (cp >= 0x3041 && cp <= 0x33ff) ||
    (cp >= 0x3400 && cp <= 0x4dbf) ||
    (cp >= 0x4e00 && cp <= 0x9fff) ||
    (cp >= 0xa000 && cp <= 0xa4cf) ||
    (cp >= 0xac00 && cp <= 0xd7a3) ||
    (cp >= 0xf900 && cp <= 0xfaff) ||
    (cp >= 0xfe30 && cp <= 0xfe4f) ||
    (cp >= 0xff00 && cp <= 0xff60) ||
    (cp >= 0xffe0 && cp <= 0xffe6) ||
    (cp >= 0x1f300 && cp <= 0x1faff) ||
    (cp >= 0x20000 && cp <= 0x3fffd)
  )
}

function bareTuiCharWidth(cp) {
  if (cp === 0) return 0
  if (cp < 32 || (cp >= 0x7f && cp < 0xa0)) return 0
  if (bareTuiIsZeroWidth(cp)) return 0
  if (bareTuiIsWide(cp)) return 2
  return 1
}

function bareTuiLineWidth(line) {
  var w = 0
  var plain = bareTuiStripAnsi(line)
  for (var i = 0; i < plain.length; ) {
    var cp = plain.codePointAt(i)
    w += bareTuiCharWidth(cp)
    i += cp > 0xffff ? 2 : 1
  }
  return w
}

function bareTuiBlockWidth(str) {
  var w = 0
  var lines = String(str).split('\n')
  for (var i = 0; i < lines.length; i++)
    w = Math.max(w, bareTuiLineWidth(lines[i]))
  return w
}

function bareTuiBlockHeight(str) {
  return String(str).split('\n').length
}

function bareTuiTruncate(str, w) {
  if (w <= 0) return ''
  str = String(str)
  var out = ''
  var used = 0
  var sawAnsi = false
  var i = 0
  while (i < str.length) {
    if (str.charAt(i) === '\x1b') {
      BARE_TUI_ANSI_STICKY.lastIndex = i
      var m = BARE_TUI_ANSI_STICKY.exec(str)
      if (m) {
        out += m[0]
        sawAnsi = true
        i = BARE_TUI_ANSI_STICKY.lastIndex
        continue
      }
    }
    var cp = str.codePointAt(i)
    var ch = String.fromCodePoint(cp)
    var cw = bareTuiCharWidth(cp)
    if (used + cw > w) break
    out += ch
    used += cw
    i += ch.length
  }
  if (sawAnsi) out += bareTuiAnsi.reset
  return out
}

function bareTuiPadLine(line, w, pos) {
  if (pos == null) pos = 0
  var lw = bareTuiLineWidth(line)
  if (lw > w) return bareTuiTruncate(line, w)
  var space = w - lw
  if (space === 0) return line
  if (pos <= 0) return line + bareTuiRepeat(' ', space)
  if (pos >= 1) return bareTuiRepeat(' ', space) + line
  var left = Math.floor(space * pos)
  return bareTuiRepeat(' ', left) + line + bareTuiRepeat(' ', space - left)
}

function bareTuiRepeat(ch, n) {
  if (n <= 0) return ''
  var s = ''
  while (s.length < n) s += ch
  return s
}

var BARE_TUI_NAMED = {
  black: 30,
  red: 31,
  green: 32,
  yellow: 33,
  blue: 34,
  magenta: 35,
  cyan: 36,
  white: 37,
  default: 39,
  gray: 90,
  grey: 90,
  brightblack: 90,
  brightred: 91,
  brightgreen: 92,
  brightyellow: 93,
  brightblue: 94,
  brightmagenta: 95,
  brightcyan: 96,
  brightwhite: 97
}

function bareTuiHexToRgb(hex) {
  var h = String(hex).replace(/^#/, '')
  if (h.length === 3)
    h =
      h.charAt(0) +
      h.charAt(0) +
      h.charAt(1) +
      h.charAt(1) +
      h.charAt(2) +
      h.charAt(2)
  var n = parseInt(h, 16)
  if (!isFinite(n)) return null
  return [(n >> 16) & 255, (n >> 8) & 255, n & 255]
}

function bareTuiRgbTo256(r, g, b) {
  if (r === g && g === b) {
    if (r < 8) return 16
    if (r > 248) return 231
    return Math.round(((r - 8) / 247) * 24) + 232
  }
  return (
    16 +
    36 * Math.round((r / 255) * 5) +
    6 * Math.round((g / 255) * 5) +
    Math.round((b / 255) * 5)
  )
}

function bareTuiRgbTo16(r, g, b) {
  var bright = r > 180 || g > 180 || b > 180
  var max = Math.max(r, g, b)
  var min = Math.min(r, g, b)
  if (max - min < 30) return bright ? 97 : 37
  if (r >= g && r >= b)
    return g > 80 && b < 80 ? (bright ? 93 : 33) : bright ? 91 : 31
  if (g >= r && g >= b) return b > 80 ? (bright ? 96 : 36) : bright ? 92 : 32
  return r > 80 ? (bright ? 95 : 35) : bright ? 94 : 34
}

function bareTuiColorParams(spec, bg, depth) {
  if (spec === undefined || spec === null || spec === '') return []
  var lead = bg ? 48 : 38
  var d = depth || 'truecolor'

  if (typeof spec === 'number') {
    if (d === '16')
      return [
        bg
          ? spec >= 8
            ? spec - 8 + 100
            : spec + 40
          : spec >= 8
            ? spec - 8 + 90
            : spec + 30
      ]
    return [lead, 5, spec & 255]
  }

  var s = String(spec)
  if (s.charAt(0) === '\x1b') return []

  if (s.charAt(0) === '#') {
    var rgb = bareTuiHexToRgb(s)
    if (!rgb) return []
    if (d === 'truecolor') return [lead, 2, rgb[0], rgb[1], rgb[2]]
    if (d === '256') return [lead, 5, bareTuiRgbTo256(rgb[0], rgb[1], rgb[2])]
    var n16 = bareTuiRgbTo16(rgb[0], rgb[1], rgb[2])
    return [bg ? n16 + 10 : n16]
  }
  var name = s.toLowerCase()
  if (name in BARE_TUI_NAMED)
    return [bg ? BARE_TUI_NAMED[name] + 10 : BARE_TUI_NAMED[name]]
  if (/^\d+$/.test(s)) {
    var idx = parseInt(s, 10) & 255
    if (d === '16') return [bg ? 40 : 30]
    return [lead, 5, idx]
  }
  return []
}

function bareTuiSgrParams(params) {
  return params.length ? bareTuiAnsi.csi + params.join(';') + 'm' : ''
}

var BARE_TUI_BORDERS = {
  normal: {
    topLeft: '\u250c',
    top: '\u2500',
    topRight: '\u2510',
    left: '\u2502',
    right: '\u2502',
    bottomLeft: '\u2514',
    bottom: '\u2500',
    bottomRight: '\u2518'
  },
  rounded: {
    topLeft: '\u256d',
    top: '\u2500',
    topRight: '\u256e',
    left: '\u2502',
    right: '\u2502',
    bottomLeft: '\u2570',
    bottom: '\u2500',
    bottomRight: '\u256f'
  },
  thick: {
    topLeft: '\u250f',
    top: '\u2501',
    topRight: '\u2513',
    left: '\u2503',
    right: '\u2503',
    bottomLeft: '\u2517',
    bottom: '\u2501',
    bottomRight: '\u251b'
  },
  double: {
    topLeft: '\u2554',
    top: '\u2550',
    topRight: '\u2557',
    left: '\u2551',
    right: '\u2551',
    bottomLeft: '\u255a',
    bottom: '\u2550',
    bottomRight: '\u255d'
  }
}

var BARE_TUI_POSITION = { top: 0, left: 0, center: 0.5, right: 1, bottom: 1 }

function bareTuiSides(args) {
  var a = []
  var i
  for (i = 0; i < args.length; i++) a.push(args[i] || 0)
  if (a.length <= 1) return [a[0] || 0, a[0] || 0, a[0] || 0, a[0] || 0]
  if (a.length === 2) return [a[0], a[1], a[0], a[1]]
  if (a.length === 3) return [a[0], a[1], a[2], a[1]]
  return [a[0], a[1], a[2], a[3]]
}

function BareTuiStyle(props) {
  this.props = props || {}
}

BareTuiStyle.prototype._with = function (patch) {
  var next = {}
  var k
  for (k in this.props) {
    if (Object.prototype.hasOwnProperty.call(this.props, k))
      next[k] = this.props[k]
  }
  for (k in patch) {
    if (Object.prototype.hasOwnProperty.call(patch, k)) next[k] = patch[k]
  }
  return new BareTuiStyle(next)
}

BareTuiStyle.prototype.bold = function (v) {
  return this._with({ bold: v !== false })
}
BareTuiStyle.prototype.faint = function (v) {
  return this._with({ faint: v !== false })
}
BareTuiStyle.prototype.dim = function (v) {
  return this.faint(v)
}
BareTuiStyle.prototype.italic = function (v) {
  return this._with({ italic: v !== false })
}
BareTuiStyle.prototype.underline = function (v) {
  return this._with({ underline: v !== false })
}
BareTuiStyle.prototype.strikethrough = function (v) {
  return this._with({ strikethrough: v !== false })
}
BareTuiStyle.prototype.reverse = function (v) {
  return this._with({ reverse: v !== false })
}
BareTuiStyle.prototype.foreground = function (c) {
  return this._with({ fg: c })
}
BareTuiStyle.prototype.background = function (c) {
  return this._with({ bg: c })
}
BareTuiStyle.prototype.width = function (n) {
  return this._with({ width: n })
}
BareTuiStyle.prototype.height = function (n) {
  return this._with({ height: n })
}
BareTuiStyle.prototype.align = function (pos) {
  return this._with({ align: pos })
}
BareTuiStyle.prototype.alignVertical = function (pos) {
  return this._with({ alignV: pos })
}
BareTuiStyle.prototype.padding = function () {
  return this._with({ padding: bareTuiSides(arguments) })
}
BareTuiStyle.prototype.margin = function () {
  return this._with({ margin: bareTuiSides(arguments) })
}
BareTuiStyle.prototype.border = function (chars) {
  var rest = []
  var i
  for (i = 1; i < arguments.length; i++) rest.push(arguments[i])
  var on = rest.length
    ? bareTuiSides(rest).map(Boolean)
    : [true, true, true, true]
  return this._with({ border: chars, borderSides: on })
}
BareTuiStyle.prototype.borderForeground = function (c) {
  return this._with({ borderFg: c })
}

BareTuiStyle.prototype._open = function () {
  if (this.props.noColor) return ''
  var p = this.props
  var params = []
  if (p.bold) params.push(1)
  if (p.faint) params.push(2)
  if (p.italic) params.push(3)
  if (p.underline) params.push(4)
  if (p.reverse) params.push(7)
  if (p.strikethrough) params.push(9)
  var depth = p.depth || 'truecolor'
  var fg = bareTuiColorParams(p.fg, false, depth)
  var bg = bareTuiColorParams(p.bg, true, depth)
  var i
  for (i = 0; i < fg.length; i++) params.push(fg[i])
  for (i = 0; i < bg.length; i++) params.push(bg[i])
  return bareTuiSgrParams(params)
}

BareTuiStyle.prototype.render = function (text) {
  var p = this.props
  var pad = p.padding || [0, 0, 0, 0]
  var mar = p.margin || [0, 0, 0, 0]
  var align = p.align || 0
  var lines = String(text).split('\n')
  var block =
    !!p.border ||
    (p.bg !== undefined && p.bg !== null) ||
    !!p.width ||
    align !== 0 ||
    pad[0] ||
    pad[1] ||
    pad[2] ||
    pad[3]
  var contentW = p.width || bareTuiBlockWidth(lines.join('\n'))
  var i
  if (block) {
    for (i = 0; i < lines.length; i++)
      lines[i] = bareTuiPadLine(lines[i], contentW, align)
  } else {
    for (i = 0; i < lines.length; i++) {
      if (bareTuiLineWidth(lines[i]) > contentW)
        lines[i] = bareTuiTruncate(lines[i], contentW)
    }
  }
  if (p.height)
    lines = bareTuiFitHeight(lines, p.height, contentW, p.alignV || 0)
  var innerW = contentW + pad[1] + pad[3]
  if (pad[1] || pad[3]) {
    var lp = bareTuiRepeat(' ', pad[3])
    var rp = bareTuiRepeat(' ', pad[1])
    for (i = 0; i < lines.length; i++) lines[i] = lp + lines[i] + rp
  }
  var blank = bareTuiRepeat(' ', innerW)
  for (i = 0; i < pad[0]; i++) lines.unshift(blank)
  for (i = 0; i < pad[2]; i++) lines.push(blank)
  var open = this._open()
  if (open) {
    var reset = bareTuiAnsi.reset
    for (i = 0; i < lines.length; i++) {
      lines[i] =
        open +
        String(lines[i])
          .split(reset)
          .join(reset + open) +
        reset
    }
  }
  if (p.border)
    lines = bareTuiApplyBorder(
      lines,
      innerW,
      p.border,
      p.borderSides,
      p.borderFg,
      p
    )
  if (mar[3] || mar[1]) {
    var lm = bareTuiRepeat(' ', mar[3])
    var rm = bareTuiRepeat(' ', mar[1])
    for (i = 0; i < lines.length; i++) lines[i] = lm + lines[i] + rm
  }
  var fullW = bareTuiBlockWidth(lines.join('\n'))
  var marginBlank = bareTuiRepeat(' ', fullW)
  for (i = 0; i < mar[0]; i++) lines.unshift(marginBlank)
  for (i = 0; i < mar[2]; i++) lines.push(marginBlank)
  return lines.join('\n')
}

function bareTuiFitHeight(lines, h, w, posV) {
  if (lines.length >= h) return lines.slice(0, h)
  var extra = h - lines.length
  var before = posV <= 0 ? 0 : posV >= 1 ? extra : Math.floor(extra * posV)
  var blank = bareTuiRepeat(' ', w)
  var out = []
  var i
  for (i = 0; i < before; i++) out.push(blank)
  for (i = 0; i < lines.length; i++) out.push(lines[i])
  for (i = 0; i < extra - before; i++) out.push(blank)
  return out
}

function bareTuiApplyBorder(lines, innerW, chars, on, fg, props) {
  var t = on[0]
  var r = on[1]
  var b = on[2]
  var l = on[3]
  var depth = (props && props.depth) || 'truecolor'
  var noColor = props && props.noColor
  var paint = function (s) {
    if (noColor) return s
    var params = bareTuiColorParams(fg, false, depth)
    return params.length ? bareTuiSgrParams(params) + s + bareTuiAnsi.reset : s
  }
  var out = []
  if (t) {
    out.push(
      paint(
        (l ? chars.topLeft : '') +
          bareTuiRepeat(chars.top, innerW) +
          (r ? chars.topRight : '')
      )
    )
  }
  var left = l ? paint(chars.left) : ''
  var right = r ? paint(chars.right) : ''
  var i
  for (i = 0; i < lines.length; i++) out.push(left + lines[i] + right)
  if (b) {
    out.push(
      paint(
        (l ? chars.bottomLeft : '') +
          bareTuiRepeat(chars.bottom, innerW) +
          (r ? chars.bottomRight : '')
      )
    )
  }
  return out
}

function bareTuiJoinHorizontal(pos) {
  var blocks = []
  var i
  for (i = 1; i < arguments.length; i++) blocks.push(arguments[i])
  var cols = []
  var widths = []
  var h = 0
  for (i = 0; i < blocks.length; i++) {
    var lines = String(blocks[i]).split('\n')
    cols.push(lines)
    widths.push(bareTuiBlockWidth(lines.join('\n')))
    if (lines.length > h) h = lines.length
  }
  var padded = []
  for (i = 0; i < cols.length; i++) {
    var filled = []
    var j
    for (j = 0; j < cols[i].length; j++)
      filled.push(bareTuiPadLine(cols[i][j], widths[i], 0))
    var extra = h - filled.length
    var before = pos <= 0 ? 0 : pos >= 1 ? extra : Math.floor(extra * pos)
    var blank = bareTuiRepeat(' ', widths[i])
    var col = []
    for (j = 0; j < before; j++) col.push(blank)
    for (j = 0; j < filled.length; j++) col.push(filled[j])
    for (j = 0; j < extra - before; j++) col.push(blank)
    padded.push(col)
  }
  var out = []
  var row
  for (row = 0; row < h; row++) {
    var s = ''
    for (i = 0; i < padded.length; i++) s += padded[i][row]
    out.push(s)
  }
  return out.join('\n')
}

function bareTuiJoinVertical(pos) {
  var blocks = []
  var i
  for (i = 1; i < arguments.length; i++) blocks.push(arguments[i])
  var w = 0
  var cols = []
  for (i = 0; i < blocks.length; i++) {
    var lines = String(blocks[i]).split('\n')
    cols.push(lines)
    var bw = bareTuiBlockWidth(lines.join('\n'))
    if (bw > w) w = bw
  }
  var out = []
  for (i = 0; i < cols.length; i++) {
    var j
    for (j = 0; j < cols[i].length; j++)
      out.push(bareTuiPadLine(cols[i][j], w, pos))
  }
  return out.join('\n')
}

function bareTuiMakeStyleFactory(ctx) {
  function style() {
    var theme = bareTuiResolveTheme(ctx, {})
    return new BareTuiStyle({ noColor: theme.noColor, depth: theme.depth })
  }
  style.Style = BareTuiStyle
  style.borders = BARE_TUI_BORDERS
  style.position = BARE_TUI_POSITION
  style.joinHorizontal = bareTuiJoinHorizontal
  style.joinVertical = bareTuiJoinVertical
  style.width = bareTuiBlockWidth
  style.height = bareTuiBlockHeight
  style.truncate = bareTuiTruncate
  style.stripAnsi = bareTuiStripAnsi
  return style
}

/* src/buffer/grid.js */
/** Cell grid: parse ANSI text, blit overlays, serialize rows. */

var BARE_TUI_CELL_BOLD = 1
var BARE_TUI_CELL_DIM = 2
var BARE_TUI_CELL_REV = 4

function bareTuiCellEmpty() {
  return { ch: ' ', fg: '', bg: '', attrs: 0 }
}

function bareTuiGridCreate(rows, cols) {
  rows = Math.max(1, rows | 0)
  cols = Math.max(1, cols | 0)
  var cells = []
  var r
  for (r = 0; r < rows; r++) {
    var row = []
    var c
    for (c = 0; c < cols; c++) row.push(bareTuiCellEmpty())
    cells.push(row)
  }
  return { rows: rows, cols: cols, cells: cells }
}

function bareTuiGridClear(grid) {
  var r, c
  for (r = 0; r < grid.rows; r++) {
    for (c = 0; c < grid.cols; c++) grid.cells[r][c] = bareTuiCellEmpty()
  }
}

function bareTuiGridPut(grid, r, c, ch, fg, bg, attrs) {
  if (r < 0 || c < 0 || r >= grid.rows || c >= grid.cols) return
  grid.cells[r][c] = { ch: ch, fg: fg || '', bg: bg || '', attrs: attrs | 0 }
}

function bareTuiApplySgr(state, params) {
  var i = 0
  if (!params.length) params = [0]
  while (i < params.length) {
    var n = params[i++] | 0
    if (n === 0) {
      state.fg = ''
      state.bg = ''
      state.attrs = 0
    } else if (n === 1) state.attrs |= BARE_TUI_CELL_BOLD
    else if (n === 2) state.attrs |= BARE_TUI_CELL_DIM
    else if (n === 22) state.attrs &= ~(BARE_TUI_CELL_BOLD | BARE_TUI_CELL_DIM)
    else if (n === 7) state.attrs |= BARE_TUI_CELL_REV
    else if (n === 27) state.attrs &= ~BARE_TUI_CELL_REV
    else if ((n >= 30 && n <= 37) || (n >= 90 && n <= 97)) state.fg = String(n)
    else if (n === 39) state.fg = ''
    else if ((n >= 40 && n <= 47) || (n >= 100 && n <= 107))
      state.bg = String(n)
    else if (n === 49) state.bg = ''
    else if (n === 38 || n === 48) {
      var kind = params[i++] | 0
      var key = n === 38 ? 'fg' : 'bg'
      if (kind === 5) {
        state[key] = n + ';5;' + (params[i++] | 0)
      } else if (kind === 2) {
        var r = params[i++] | 0
        var g = params[i++] | 0
        var b = params[i++] | 0
        state[key] = n + ';2;' + r + ';' + g + ';' + b
      }
    }
  }
}

function bareTuiParseSgrParams(body) {
  if (!body) return [0]
  var parts = String(body).split(';')
  var out = []
  var i
  for (i = 0; i < parts.length; i++) {
    if (parts[i] === '') out.push(0)
    else out.push(parseInt(parts[i], 10) || 0)
  }
  return out
}

function bareTuiGridWriteText(grid, startRow, startCol, text) {
  var state = { fg: '', bg: '', attrs: 0 }
  var r = startRow
  var c = startCol
  var i = 0
  text = String(text == null ? '' : text)
  while (i < text.length) {
    var ch0 = text.charAt(i)
    if (ch0 === '\n') {
      r++
      c = startCol
      i++
      continue
    }
    if (ch0 === '\r') {
      i++
      continue
    }
    if (ch0 === '\x1b') {
      BARE_TUI_ANSI_STICKY.lastIndex = i
      var m = BARE_TUI_ANSI_STICKY.exec(text)
      if (m) {
        var seq = m[0]
        i = BARE_TUI_ANSI_STICKY.lastIndex
        if (seq.charAt(seq.length - 1) === 'm') {
          var inner = seq.slice(2, seq.length - 1)
          bareTuiApplySgr(state, bareTuiParseSgrParams(inner))
        }
        continue
      }
    }
    var cp = text.codePointAt(i)
    var glyph = String.fromCodePoint(cp)
    var cw = bareTuiCharWidth(cp)
    i += glyph.length
    if (cw <= 0) continue
    bareTuiGridPut(grid, r, c, glyph, state.fg, state.bg, state.attrs)
    if (cw === 2 && c + 1 < grid.cols) {
      bareTuiGridPut(grid, r, c + 1, '', state.fg, state.bg, state.attrs)
    }
    c += cw
  }
}

function bareTuiGridFill(grid, text) {
  bareTuiGridClear(grid)
  bareTuiGridWriteText(grid, 0, 0, text)
  return grid
}

function bareTuiGridBlit(grid, row, col, text) {
  var tmpRows = String(text == null ? '' : text).split('\n').length
  var tmpCols = Math.max(1, bareTuiBlockWidth(text || ' '))
  var tmp = bareTuiGridCreate(tmpRows, tmpCols)
  bareTuiGridWriteText(tmp, 0, 0, text)
  var r, c
  for (r = 0; r < tmp.rows; r++) {
    for (c = 0; c < tmp.cols; c++) {
      var cell = tmp.cells[r][c]
      if (cell.ch === ' ' && !cell.fg && !cell.bg && !cell.attrs) continue
      bareTuiGridPut(
        grid,
        row + r,
        col + c,
        cell.ch,
        cell.fg,
        cell.bg,
        cell.attrs
      )
    }
  }
  return grid
}

function bareTuiGridPlain(grid) {
  var lines = []
  var r, c
  for (r = 0; r < grid.rows; r++) {
    var s = ''
    for (c = 0; c < grid.cols; c++) {
      var ch = grid.cells[r][c].ch
      if (ch !== '') s += ch
    }
    lines.push(s.replace(/\s+$/, ''))
  }
  return lines
}

function bareTuiGridRowKey(grid, r) {
  var s = ''
  var c
  for (c = 0; c < grid.cols; c++) {
    var cell = grid.cells[r][c]
    s +=
      cell.ch +
      '\x01' +
      cell.fg +
      '\x01' +
      cell.bg +
      '\x01' +
      cell.attrs +
      '\x02'
  }
  return s
}

function bareTuiCellSgr(cell) {
  var params = []
  if (cell.attrs & BARE_TUI_CELL_BOLD) params.push(1)
  if (cell.attrs & BARE_TUI_CELL_DIM) params.push(2)
  if (cell.attrs & BARE_TUI_CELL_REV) params.push(7)
  if (cell.fg) {
    var fg = String(cell.fg)
    if (fg.indexOf(';') >= 0) {
      var fp = fg.split(';')
      var fi
      for (fi = 0; fi < fp.length; fi++) params.push(parseInt(fp[fi], 10) || 0)
    } else params.push(parseInt(fg, 10) || 0)
  }
  if (cell.bg) {
    var bg = String(cell.bg)
    if (bg.indexOf(';') >= 0) {
      var bp = bg.split(';')
      var bi
      for (bi = 0; bi < bp.length; bi++) params.push(parseInt(bp[bi], 10) || 0)
    } else params.push(parseInt(bg, 10) || 0)
  }
  return params.length ? bareTuiAnsi.csi + params.join(';') + 'm' : ''
}

function bareTuiGridPaintRow(grid, r) {
  var out = ''
  var last = ''
  var c
  for (c = 0; c < grid.cols; c++) {
    var cell = grid.cells[r][c]
    if (cell.ch === '') continue
    var sg = bareTuiCellSgr(cell)
    if (sg !== last) {
      out += bareTuiAnsi.reset + sg
      last = sg
    }
    out += cell.ch
  }
  if (last) out += bareTuiAnsi.reset
  return out
}

/* src/render/line-diff.js */
/** Line-diff renderer. Repaints only changed rows. Does not own alt-screen. */

function BareTuiRenderer(output) {
  this.out = output
  this.mode = 'line'
  this.lastLines = null
}

BareTuiRenderer.prototype.clear = function () {
  this.lastLines = null
}

BareTuiRenderer.prototype.write = function (s) {
  if (!s) return
  if (this.out && typeof this.out.write === 'function') this.out.write(s)
}

BareTuiRenderer.prototype.render = function (view) {
  var lines = String(view).split('\n')
  var s = ''
  var i
  if (this.lastLines === null) {
    s += bareTuiAnsi.home
    for (i = 0; i < lines.length; i++) {
      s += bareTuiAnsi.eraseLineEnd + lines[i]
      if (i < lines.length - 1) s += '\r\n'
    }
    s += bareTuiAnsi.eraseDisplayEnd
  } else {
    for (i = 0; i < lines.length; i++) {
      if (lines[i] !== this.lastLines[i]) {
        s += bareTuiAnsi.cursorTo(i, 0) + bareTuiAnsi.eraseLineEnd + lines[i]
      }
    }
    if (this.lastLines.length > lines.length) {
      s += bareTuiAnsi.cursorTo(lines.length, 0) + bareTuiAnsi.eraseDisplayEnd
    }
  }
  this.lastLines = lines
  this.write(s)
}

/* src/render/cell.js */
/** Dirty-row cell renderer. Base view + overlays; no layout insert. */

function BareTuiCellRenderer(output, opts) {
  opts = opts || {}
  this.out = output
  this.mode = 'cell'
  this.rows = Math.max(1, opts.rows || opts.height || 24)
  this.cols = Math.max(1, opts.cols || opts.width || 80)
  this.grid = bareTuiGridCreate(this.rows, this.cols)
  this.lastKeys = null
}

BareTuiCellRenderer.prototype.write = function (s) {
  if (!s) return
  if (this.out && typeof this.out.write === 'function') this.out.write(s)
}

BareTuiCellRenderer.prototype.resize = function (rows, cols) {
  rows = Math.max(1, rows | 0)
  cols = Math.max(1, cols | 0)
  if (rows === this.rows && cols === this.cols) return
  this.rows = rows
  this.cols = cols
  this.grid = bareTuiGridCreate(rows, cols)
  this.lastKeys = null
}

BareTuiCellRenderer.prototype.clear = function () {
  this.lastKeys = null
}

BareTuiCellRenderer.prototype.render = function (view, overlays) {
  bareTuiGridFill(this.grid, view == null ? '' : view)
  if (overlays && overlays.length) {
    var i
    for (i = 0; i < overlays.length; i++) {
      var ov = overlays[i]
      if (!ov || ov.text == null) continue
      bareTuiGridBlit(this.grid, ov.row | 0, ov.col | 0, ov.text)
    }
  }
  var keys = []
  var s = ''
  var r
  for (r = 0; r < this.grid.rows; r++) {
    keys[r] = bareTuiGridRowKey(this.grid, r)
    if (this.lastKeys && this.lastKeys[r] === keys[r]) continue
    s +=
      bareTuiAnsi.cursorTo(r, 0) +
      bareTuiAnsi.eraseLineEnd +
      bareTuiGridPaintRow(this.grid, r)
  }
  if (!this.lastKeys) s = bareTuiAnsi.home + s
  this.lastKeys = keys
  this.write(s)
}

BareTuiCellRenderer.prototype.plain = function () {
  return bareTuiGridPlain(this.grid)
}

/* src/program/commands.js */
/** TEA commands. A Cmd is () => Msg | Promise<Msg> | null, or a marker object. */

function bareTuiQuitCmd() {
  return { type: 'quit' }
}

function bareTuiTick(ms, fn) {
  var delay = ms | 0
  if (delay < 0) delay = 0
  return function () {
    return new Promise(function (resolve) {
      setTimeout(function () {
        resolve(fn ? fn(new Date()) : { type: 'tick' })
      }, delay)
    })
  }
}

function bareTuiEvery(ms, fn) {
  var period = ms | 0
  if (period < 1) period = 1
  return function () {
    return new Promise(function (resolve) {
      var wait = period - (Date.now() % period)
      setTimeout(function () {
        resolve(fn ? fn(new Date()) : { type: 'tick' })
      }, wait)
    })
  }
}

function bareTuiBatch() {
  var out = []
  var i
  for (i = 0; i < arguments.length; i++) {
    var c = arguments[i]
    if (Array.isArray(c)) {
      var j
      for (j = 0; j < c.length; j++) if (c[j]) out.push(c[j])
    } else if (c) {
      out.push(c)
    }
  }
  return out
}

function bareTuiSequence() {
  var out = []
  var i
  for (i = 0; i < arguments.length; i++) {
    var c = arguments[i]
    if (Array.isArray(c)) {
      var j
      for (j = 0; j < c.length; j++) if (c[j]) out.push(c[j])
    } else if (c) {
      out.push(c)
    }
  }
  return { __seq: out }
}

function bareTuiSuspend(fn) {
  return { __suspend: fn }
}

/* src/program/program.js */
/** TEA Program: init / update / view over the session adapter. */

var bareTuiActivePrograms = []

function bareTuiActiveProgram(ctx) {
  var i
  for (i = bareTuiActivePrograms.length - 1; i >= 0; i--) {
    if (bareTuiActivePrograms[i].ctx === ctx) return bareTuiActivePrograms[i]
  }
  return null
}

function BareTuiProgram(ctx, model, opts) {
  this.ctx = ctx
  this.model = model
  this.opts = opts || {}
  this.fps = this.opts.fps == null ? 60 : this.opts.fps
  this._frameMs = this.fps > 0 ? Math.max(1, Math.round(1000 / this.fps)) : 0
  this._frameTimer = null
  this._needsRender = false
  this._queue = []
  this._wake = null
  this._running = false
  this._tornDown = false
  this._suspended = false
  this._decoder = null
  this._onInput = null
  this._onResize = null
  this._escTimer = null
  this._abortOn = null
  this.input = bareTuiResolveStdin(ctx, this.opts)
  this.output = bareTuiResolveStdout(ctx, this.opts)
  if (!this.output || typeof this.output.write !== 'function') {
    throw new Error('tui: no output stream; pass opts.output')
  }
  this._overlayMap = {}
  var size0 = bareTuiSize(ctx, this.opts)
  if (this.opts.buffer === 'cell') {
    this.renderer = new BareTuiCellRenderer(this.output, {
      rows: this.opts.height || size0.height,
      cols: this.opts.width || size0.width
    })
  } else {
    this.renderer = new BareTuiRenderer(this.output)
  }
}

BareTuiProgram.prototype.setOverlay = function (id, spec) {
  if (!id) return
  if (!spec) {
    delete this._overlayMap[id]
    return
  }
  this._overlayMap[id] = spec
}

BareTuiProgram.prototype.clearOverlay = function (id) {
  if (id) delete this._overlayMap[id]
  else this._overlayMap = {}
}

BareTuiProgram.prototype._overlaysForPaint = function () {
  var out = []
  var id
  for (id in this._overlayMap) {
    if (
      Object.prototype.hasOwnProperty.call(this._overlayMap, id) &&
      this._overlayMap[id]
    ) {
      out.push(this._overlayMap[id])
    }
  }
  var model = this.model
  if (!model) return out
  var size = bareTuiSize(this.ctx, this.opts)
  if (typeof model.overlays === 'function') {
    var list = model.overlays(size) || []
    var i
    for (i = 0; i < list.length; i++) if (list[i]) out.push(list[i])
  } else if (typeof model.overlay === 'function') {
    var one = model.overlay(size)
    if (one) out.push(one)
  }
  return out
}

BareTuiProgram.prototype._paint = function () {
  var view = this._view()
  if (this.renderer && this.renderer.mode === 'cell') {
    var sz = bareTuiSize(this.ctx, this.opts)
    this.renderer.resize(
      this.opts.height || sz.height,
      this.opts.width || sz.width
    )
    this.renderer.render(view, this._overlaysForPaint())
  } else {
    this.renderer.render(view)
  }
}

BareTuiProgram.prototype.send = function (msg) {
  if (!msg) return
  this._queue.push(msg)
  if (this._wake) {
    var wake = this._wake
    this._wake = null
    wake()
  }
}

BareTuiProgram.prototype.quit = function () {
  this.send({ type: 'quit' })
}

BareTuiProgram.prototype.run = async function () {
  this._running = true
  bareTuiActivePrograms.push(this)
  var acquired = false
  var entered = false
  try {
    if (
      !this.opts.input &&
      !this.opts.allowDumb &&
      !bareTuiIsTTY(this.ctx, this.opts)
    ) {
      if (
        this.ctx &&
        this.ctx.console &&
        typeof this.ctx.console.error === 'function'
      ) {
        this.ctx.console.error('tui: needs a TTY')
      }
      if (
        this.ctx &&
        (this.ctx.exitCode === undefined || this.ctx.exitCode === null)
      ) {
        this.ctx.exitCode = 1
      }
      return this.model
    }
    bareTuiAcquire(this.ctx, this.opts)
    acquired = true
    bareTuiScreenEnter(this.ctx, this.opts)
    entered = true
    this._setupInput()
    if (typeof this.model.init === 'function') this._exec(this.model.init())
    var size = bareTuiSize(this.ctx, this.opts)
    this.send({ type: 'resize', width: size.width, height: size.height })
    this._paint()
    while (this._running) {
      var msg = await this._next()
      if (!msg) continue
      if (msg.type === 'quit') break
      if (msg.type === 'resize') this.renderer.clear()
      var pair = this._update(msg)
      this.model = pair[0]
      this._invalidate()
      this._exec(pair[1])
    }
  } finally {
    this._running = false
    this._cancelFrame()
    if (this._needsRender) {
      this._needsRender = false
      try {
        this._paint()
      } catch (e) {
        /* ignore */
      }
    }
    this._teardownInput()
    if (entered) {
      try {
        bareTuiScreenLeave(this.ctx, this.opts)
      } catch (e2) {
        /* ignore */
      }
    }
    if (acquired) {
      try {
        bareTuiRelease(this.ctx, this.opts)
      } catch (e3) {
        /* ignore */
      }
    }
    var idx = bareTuiActivePrograms.indexOf(this)
    if (idx >= 0) bareTuiActivePrograms.splice(idx, 1)
  }
  return this.model
}

BareTuiProgram.prototype._invalidate = function () {
  var self = this
  if (this._suspended) return
  if (this._frameMs === 0) {
    this._paint()
    return
  }
  this._needsRender = true
  if (this._frameTimer) return
  this._frameTimer = setTimeout(function () {
    self._frameTimer = null
    if (self._needsRender) {
      self._needsRender = false
      self._paint()
    }
  }, this._frameMs)
}

BareTuiProgram.prototype._cancelFrame = function () {
  if (this._frameTimer) {
    clearTimeout(this._frameTimer)
    this._frameTimer = null
  }
}

BareTuiProgram.prototype._setupInput = function () {
  var self = this
  this._decoder = bareTuiCreateDecoder()
  this._onInput = function (data) {
    self._decoder.push(data)
    if (self._escTimer) {
      clearTimeout(self._escTimer)
      self._escTimer = null
    }
    var evs = self._decoder.take()
    var i
    for (i = 0; i < evs.length; i++) self.send(evs[i])
    if (self._decoder.pending()) {
      self._escTimer = setTimeout(function () {
        self._escTimer = null
        var esc = self._decoder.flushEscape()
        if (esc) self.send(esc)
        var more = self._decoder.take()
        var j
        for (j = 0; j < more.length; j++) self.send(more[j])
      }, 50)
    }
  }
  if (this.input && typeof this.input.on === 'function') {
    this.input.on('data', this._onInput)
  }
  if (this.output && typeof this.output.on === 'function') {
    this._onResize = function () {
      var sz = bareTuiSize(self.ctx, self.opts)
      self.send({ type: 'resize', width: sz.width, height: sz.height })
    }
    this.output.on('resize', this._onResize)
  }
  var sig = this.opts.signal
  if (sig && typeof sig.addEventListener === 'function') {
    this._abortOn = function () {
      self.quit()
    }
    if (sig.aborted) this.quit()
    else sig.addEventListener('abort', this._abortOn)
  }
}

BareTuiProgram.prototype._teardownInput = function () {
  if (this._tornDown) return
  this._tornDown = true
  this._cancelFrame()
  if (this._escTimer) {
    clearTimeout(this._escTimer)
    this._escTimer = null
  }
  try {
    if (
      this.input &&
      this._onInput &&
      typeof this.input.removeListener === 'function'
    ) {
      this.input.removeListener('data', this._onInput)
    }
  } catch (e) {
    /* ignore */
  }
  try {
    if (
      this.output &&
      this._onResize &&
      typeof this.output.removeListener === 'function'
    ) {
      this.output.removeListener('resize', this._onResize)
    }
  } catch (e2) {
    /* ignore */
  }
  if (
    this.opts.signal &&
    this._abortOn &&
    typeof this.opts.signal.removeEventListener === 'function'
  ) {
    try {
      this.opts.signal.removeEventListener('abort', this._abortOn)
    } catch (e3) {
      /* ignore */
    }
  }
}

BareTuiProgram.prototype._suspendTerminal = function () {
  this._suspended = true
  this._cancelFrame()
  try {
    if (
      this.input &&
      this._onInput &&
      typeof this.input.removeListener === 'function'
    ) {
      this.input.removeListener('data', this._onInput)
    }
  } catch (e) {
    /* ignore */
  }
  try {
    if (this.input && typeof this.input.pause === 'function') this.input.pause()
  } catch (e2) {
    /* ignore */
  }
  try {
    bareTuiScreenLeave(this.ctx, this.opts)
  } catch (e3) {
    /* ignore */
  }
}

BareTuiProgram.prototype._resumeTerminal = function () {
  try {
    bareTuiScreenEnter(this.ctx, this.opts)
  } catch (e) {
    /* ignore */
  }
  if (this.input && this._onInput && typeof this.input.on === 'function') {
    this.input.on('data', this._onInput)
  }
  try {
    if (this.input && typeof this.input.resume === 'function')
      this.input.resume()
  } catch (e2) {
    /* ignore */
  }
  this.renderer.clear()
  this._suspended = false
}

BareTuiProgram.prototype._update = function (msg) {
  if (!this.model || typeof this.model.update !== 'function')
    return [this.model, null]
  var ret = this.model.update(msg)
  if (ret === undefined || ret === null) return [this.model, null]
  if (Array.isArray(ret))
    return [
      ret[0] != null ? ret[0] : this.model,
      ret[1] != null ? ret[1] : null
    ]
  return [ret, null]
}

BareTuiProgram.prototype._view = function () {
  try {
    if (!this.model || typeof this.model.view !== 'function') return ''
    return String(this.model.view())
  } catch (err) {
    return 'view error: ' + (err && err.message)
  }
}

BareTuiProgram.prototype._exec = function (cmd) {
  this._runCmd(cmd)
}

BareTuiProgram.prototype._runCmd = async function (cmd) {
  if (!cmd || !this._running) return
  var self = this
  if (Array.isArray(cmd)) {
    await Promise.all(
      cmd.map(function (c) {
        return self._runCmd(c)
      })
    )
    return
  }
  if (cmd.__seq) {
    var i
    for (i = 0; i < cmd.__seq.length; i++) {
      if (!this._running) return
      await this._runCmd(cmd.__seq[i])
    }
    return
  }
  if (cmd.__suspend) {
    this._suspendTerminal()
    var msg = null
    try {
      msg = await cmd.__suspend()
    } catch (error) {
      msg = { type: 'error', error: error }
    }
    if (this._running) {
      this._resumeTerminal()
      this._invalidate()
    }
    this.send(msg)
    return
  }
  if (typeof cmd !== 'function') return
  try {
    this.send(await cmd())
  } catch (error) {
    this.send({ type: 'error', error: error })
  }
}

BareTuiProgram.prototype._next = async function () {
  var self = this
  if (this._queue.length === 0) {
    await new Promise(function (resolve) {
      self._wake = resolve
    })
  }
  return this._queue.shift()
}

function bareTuiCreateProgram(ctx, model, opts) {
  return new BareTuiProgram(ctx, model, opts)
}

function bareTuiRunProgram(ctx, model, opts) {
  return bareTuiCreateProgram(ctx, model, opts).run()
}

function bareTuiSendActive(ctx, msg) {
  var p = bareTuiActiveProgram(ctx)
  if (p) p.send(msg)
}

/* src/widgets/spinner.js */
/** Cmd-driven spinner. Route spinner.tick and thread the Cmd up. */

var BARE_TUI_SPINNER_DOTS = ['⠋', '⠙', '⠹', '⠸', '⠼', '⠴', '⠦', '⠧', '⠇', '⠏']
var BARE_TUI_SPINNER_LINE = ['|', '/', '-', '\\']
var BARE_TUI_SPINNER_POINTS = ['∙∙∙', '●∙∙', '∙●∙', '∙∙●']

function BareTuiSpinner(opts) {
  opts = opts || {}
  this.frames = opts.frames || BARE_TUI_SPINNER_DOTS
  this.fps = opts.fps || 10
  this.frame = 0
  this.id = bareTuiNextWidgetId++
  this.tag = 0
}

BareTuiSpinner.prototype.init = function () {
  return this._tick()
}

BareTuiSpinner.prototype._tick = function () {
  var id = this.id
  var tag = this.tag
  var ms = Math.max(1, Math.round(1000 / this.fps))
  return bareTuiTick(ms, function () {
    return { type: 'spinner.tick', id: id, tag: tag }
  })
}

BareTuiSpinner.prototype.update = function (msg) {
  if (!msg || msg.type !== 'spinner.tick') return [this, null]
  if (msg.id !== this.id || msg.tag !== this.tag) return [this, null]
  this.frame = (this.frame + 1) % this.frames.length
  this.tag++
  return [this, this._tick()]
}

BareTuiSpinner.prototype.view = function () {
  return this.frames[this.frame]
}

var bareTuiSpinner = {
  create: function (opts) {
    return new BareTuiSpinner(opts)
  },
  dots: BARE_TUI_SPINNER_DOTS,
  line: BARE_TUI_SPINNER_LINE,
  points: BARE_TUI_SPINNER_POINTS
}

/* src/widgets/textinput.js */
/** Single-line field. Consumes keys only when focused. */

function BareTuiTextInput(opts) {
  opts = opts || {}
  this.value = opts.value || ''
  this.placeholder = opts.placeholder || ''
  this.prompt = opts.prompt || ''
  this.charLimit = opts.charLimit || 0
  this.echoMode = opts.echoMode || 'normal'
  this.maskChar = opts.maskChar || '•'
  this.focused = !!opts.focused
  this.cursor = this.value.length
}

BareTuiTextInput.prototype.focus = function () {
  this.focused = true
  return this
}
BareTuiTextInput.prototype.blur = function () {
  this.focused = false
  return this
}
BareTuiTextInput.prototype.setValue = function (v) {
  v = String(v)
  this.value = this.charLimit ? v.slice(0, this.charLimit) : v
  if (this.cursor > this.value.length) this.cursor = this.value.length
  return this
}
BareTuiTextInput.prototype.reset = function () {
  this.value = ''
  this.cursor = 0
  return this
}

BareTuiTextInput.prototype.update = function (msg) {
  if (!this.focused || !msg || msg.type !== 'key') return [this, null]
  if (msg.is('left')) this.cursor = Math.max(0, this.cursor - 1)
  else if (msg.is('right'))
    this.cursor = Math.min(this.value.length, this.cursor + 1)
  else if (msg.is('home')) this.cursor = 0
  else if (msg.is('end')) this.cursor = this.value.length
  else if (msg.is('backspace')) {
    if (this.cursor > 0) {
      this.value =
        this.value.slice(0, this.cursor - 1) + this.value.slice(this.cursor)
      this.cursor--
    }
  } else if (msg.is('delete')) {
    if (this.cursor < this.value.length) {
      this.value =
        this.value.slice(0, this.cursor) + this.value.slice(this.cursor + 1)
    }
  } else this._insert(msg)
  return [this, null]
}

BareTuiTextInput.prototype._insert = function (msg) {
  var ch = msg.sequence
  var printable =
    !msg.ctrl &&
    !msg.meta &&
    typeof ch === 'string' &&
    ch.length === 1 &&
    ch >= ' ' &&
    ch !== '\x7f'
  if (!printable) return
  if (this.charLimit && this.value.length >= this.charLimit) return
  this.value =
    this.value.slice(0, this.cursor) + ch + this.value.slice(this.cursor)
  this.cursor++
}

BareTuiTextInput.prototype._display = function () {
  if (this.echoMode === 'password') {
    var s = ''
    var i
    for (i = 0; i < this.value.length; i++) s += this.maskChar
    return s
  }
  return this.value
}

BareTuiTextInput.prototype.view = function () {
  var rev = function (s) {
    return bareTuiAnsi.modifierReverse + s + bareTuiAnsi.modifierNotReverse
  }
  var dim = function (s) {
    return bareTuiAnsi.modifierDim + s + bareTuiAnsi.reset
  }
  if (this.value.length === 0) {
    if (!this.focused) return this.prompt + dim(this.placeholder)
    var head = this.placeholder.slice(0, 1) || ' '
    return this.prompt + rev(head) + dim(this.placeholder.slice(1))
  }
  var text = this._display()
  if (!this.focused) return this.prompt + text
  var at = text.slice(this.cursor, this.cursor + 1) || ' '
  return (
    this.prompt +
    text.slice(0, this.cursor) +
    rev(at) +
    text.slice(this.cursor + 1)
  )
}

var bareTuiTextinput = {
  create: function (opts) {
    return new BareTuiTextInput(opts)
  }
}

/* src/widgets/choices.js */
/** Checkbox, radio, and compact select. Focus-gated. */

function BareTuiCheckbox(opts) {
  opts = opts || {}
  this.label = opts.label || ''
  this.checked = !!opts.checked
  this.focused = !!opts.focused
  this.checkedGlyph = opts.checkedGlyph || '[x]'
  this.uncheckedGlyph = opts.uncheckedGlyph || '[ ]'
}
BareTuiCheckbox.prototype.focus = function () {
  this.focused = true
  return this
}
BareTuiCheckbox.prototype.blur = function () {
  this.focused = false
  return this
}
BareTuiCheckbox.prototype.setChecked = function (v) {
  this.checked = !!v
  return this
}
BareTuiCheckbox.prototype.toggle = function () {
  this.checked = !this.checked
  return this
}
BareTuiCheckbox.prototype.update = function (msg) {
  if (!this.focused || !msg || msg.type !== 'key') return [this, null]
  if (msg.is('space')) this.toggle()
  return [this, null]
}
BareTuiCheckbox.prototype.view = function () {
  var pointer = this.focused ? '› ' : '  '
  var box = this.checked ? this.checkedGlyph : this.uncheckedGlyph
  return pointer + (this.label ? box + ' ' + this.label : box)
}

function bareTuiNormOptions(opts) {
  var raw = (opts && opts.options) || []
  var out = []
  var i
  for (i = 0; i < raw.length; i++) {
    var it = raw[i]
    if (it && typeof it === 'object') {
      out.push({
        label: it.label != null ? String(it.label) : String(it.value),
        value: it.value
      })
    } else {
      out.push({ label: String(it), value: it })
    }
  }
  return out
}

function BareTuiRadio(opts) {
  opts = opts || {}
  this.options = bareTuiNormOptions(opts)
  this.selected = opts.selected | 0
  this.focused = !!opts.focused
  if (this.selected < 0) this.selected = 0
  if (this.selected >= this.options.length)
    this.selected = Math.max(0, this.options.length - 1)
}
BareTuiRadio.prototype.focus = function () {
  this.focused = true
  return this
}
BareTuiRadio.prototype.blur = function () {
  this.focused = false
  return this
}
BareTuiRadio.prototype.value = function () {
  var o = this.options[this.selected]
  return o ? o.value : null
}
BareTuiRadio.prototype.update = function (msg) {
  if (!this.focused || !msg || msg.type !== 'key') return [this, null]
  if (msg.is('up', 'k')) this.selected = Math.max(0, this.selected - 1)
  else if (msg.is('down', 'j'))
    this.selected = Math.min(this.options.length - 1, this.selected + 1)
  return [this, null]
}
BareTuiRadio.prototype.view = function () {
  var lines = []
  var i
  for (i = 0; i < this.options.length; i++) {
    var mark = i === this.selected ? '(•)' : '( )'
    var ptr = this.focused && i === this.selected ? '› ' : '  '
    lines.push(ptr + mark + ' ' + this.options[i].label)
  }
  return lines.join('\n')
}

function BareTuiSelect(opts) {
  opts = opts || {}
  this.options = bareTuiNormOptions(opts)
  this.selected = opts.selected | 0
  this.placeholder = opts.placeholder || ''
  this.focused = !!opts.focused
  this.open = false
  if (this.selected < 0) this.selected = 0
}
BareTuiSelect.prototype.focus = function () {
  this.focused = true
  return this
}
BareTuiSelect.prototype.blur = function () {
  this.focused = false
  this.open = false
  return this
}
BareTuiSelect.prototype.value = function () {
  var o = this.options[this.selected]
  return o ? o.value : null
}
BareTuiSelect.prototype.update = function (msg) {
  if (!this.focused || !msg || msg.type !== 'key') return [this, null]
  if (!this.open) {
    if (msg.is('enter', 'space', 'down')) this.open = true
    return [this, null]
  }
  if (msg.is('esc')) this.open = false
  else if (msg.is('enter')) this.open = false
  else if (msg.is('up', 'k')) this.selected = Math.max(0, this.selected - 1)
  else if (msg.is('down', 'j'))
    this.selected = Math.min(this.options.length - 1, this.selected + 1)
  return [this, null]
}
BareTuiSelect.prototype.view = function () {
  var cur = this.options[this.selected]
  var label = cur ? cur.label : this.placeholder
  var ptr = this.focused ? '› ' : '  '
  return ptr + (label || this.placeholder)
}
BareTuiSelect.prototype.menuView = function () {
  if (!this.open) return ''
  var lines = []
  var i
  for (i = 0; i < this.options.length; i++) {
    var mark = i === this.selected ? '› ' : '  '
    lines.push(mark + this.options[i].label)
  }
  return lines.join('\n')
}

var bareTuiCheckbox = {
  create: function (opts) {
    return new BareTuiCheckbox(opts)
  }
}
var bareTuiRadio = {
  create: function (opts) {
    return new BareTuiRadio(opts)
  }
}
var bareTuiSelect = {
  create: function (opts) {
    return new BareTuiSelect(opts)
  }
}

/* src/widgets/scroll.js */
/** Viewport and paginator. */

function BareTuiViewport(opts) {
  opts = opts || {}
  this.width = opts.width || 0
  this.height = opts.height || 0
  this.yOffset = 0
  this.lines = []
}
BareTuiViewport.prototype.setContent = function (content) {
  this.lines = String(content).split('\n')
  this._clamp()
  return this
}
BareTuiViewport.prototype._max = function () {
  return Math.max(0, this.lines.length - this.height)
}
BareTuiViewport.prototype.atTop = function () {
  return this.yOffset <= 0
}
BareTuiViewport.prototype.atBottom = function () {
  return this.yOffset >= this._max()
}
BareTuiViewport.prototype.setYOffset = function (n) {
  this.yOffset = n
  this._clamp()
  return this
}
BareTuiViewport.prototype.scrollUp = function (n) {
  return this.setYOffset(this.yOffset - (n == null ? 1 : n))
}
BareTuiViewport.prototype.scrollDown = function (n) {
  return this.setYOffset(this.yOffset + (n == null ? 1 : n))
}
BareTuiViewport.prototype.gotoTop = function () {
  return this.setYOffset(0)
}
BareTuiViewport.prototype.gotoBottom = function () {
  return this.setYOffset(this._max())
}
BareTuiViewport.prototype._clamp = function () {
  var max = this._max()
  if (this.yOffset < 0) this.yOffset = 0
  if (this.yOffset > max) this.yOffset = max
}
BareTuiViewport.prototype.update = function (msg) {
  if (!msg || msg.type !== 'key') return [this, null]
  var h = this.height || 1
  if (msg.is('up', 'k')) this.scrollUp(1)
  else if (msg.is('down', 'j')) this.scrollDown(1)
  else if (msg.is('pageup', 'b')) this.scrollUp(h)
  else if (msg.is('pagedown', 'f')) this.scrollDown(h)
  else if (msg.is('home')) this.gotoTop()
  else if (msg.is('end')) this.gotoBottom()
  return [this, null]
}
BareTuiViewport.prototype.view = function () {
  var out = []
  var i
  for (i = 0; i < this.height; i++) {
    var line = this.lines[this.yOffset + i]
    if (line == null) line = ''
    if (this.width > 0) line = bareTuiTruncate(line, this.width)
    out.push(line)
  }
  return out.join('\n')
}

function BareTuiPaginator(opts) {
  opts = opts || {}
  this.perPage = opts.perPage || 10
  this.total = opts.total || 0
  this.page = opts.page || 0
  this.kind = opts.type || 'dots'
}
BareTuiPaginator.prototype.pages = function () {
  if (this.perPage <= 0) return 1
  return Math.max(1, Math.ceil(this.total / this.perPage))
}
BareTuiPaginator.prototype.update = function (msg) {
  if (!msg || msg.type !== 'key') return [this, null]
  var n = this.pages()
  if (msg.is('left', 'h', 'pageup')) this.page = Math.max(0, this.page - 1)
  else if (msg.is('right', 'l', 'pagedown'))
    this.page = Math.min(n - 1, this.page + 1)
  return [this, null]
}
BareTuiPaginator.prototype.view = function () {
  var n = this.pages()
  if (this.kind === 'arabic') return this.page + 1 + '/' + n
  var s = ''
  var i
  for (i = 0; i < n; i++) s += i === this.page ? '●' : '○'
  return s
}

var bareTuiViewport = {
  create: function (opts) {
    return new BareTuiViewport(opts)
  }
}
var bareTuiPaginator = {
  create: function (opts) {
    return new BareTuiPaginator(opts)
  }
}

/* src/widgets/list.js */
/** Selectable, optionally filterable list. */

function bareTuiItemTitle(item) {
  if (item == null) return ''
  if (typeof item === 'string') return item
  return item.title != null ? String(item.title) : String(item)
}
function bareTuiItemFilter(item) {
  if (item == null) return ''
  if (typeof item === 'string') return item
  return String(item.filterValue || item.title || item)
}

function BareTuiList(opts) {
  opts = opts || {}
  this.items = opts.items ? opts.items.slice() : []
  this.height = opts.height || 10
  this.width = opts.width || 0
  this.title = opts.title || ''
  this.filterable = opts.filterable !== false
  this.input = bareTuiTextinput.create({ prompt: '' })
  this.filter = ''
  this.filtering = false
  this.selected = 0
  this.offset = 0
  this.filtered = []
  this._applyFilter()
}
BareTuiList.prototype.selectedItem = function () {
  if (!this.filtered.length) return null
  return this.items[this.filtered[this.selected]]
}
BareTuiList.prototype.setItems = function (items) {
  this.items = items.slice()
  this._applyFilter()
  return this
}
BareTuiList.prototype._applyFilter = function () {
  var q = this.filter.toLowerCase()
  this.filtered = []
  var i
  for (i = 0; i < this.items.length; i++) {
    if (!q || bareTuiItemFilter(this.items[i]).toLowerCase().indexOf(q) >= 0) {
      this.filtered.push(i)
    }
  }
  if (this.selected >= this.filtered.length)
    this.selected = Math.max(0, this.filtered.length - 1)
  this._keepVisible()
}
BareTuiList.prototype._keepVisible = function () {
  if (this.selected < this.offset) this.offset = this.selected
  if (this.selected >= this.offset + this.height)
    this.offset = this.selected - this.height + 1
  if (this.offset < 0) this.offset = 0
}
BareTuiList.prototype.update = function (msg) {
  if (!msg || msg.type !== 'key') return [this, null]
  if (this.filtering) {
    if (msg.is('escape', 'esc')) {
      this.filtering = false
      this.filter = ''
      this.input.reset().blur()
      this._applyFilter()
      return [this, null]
    }
    if (msg.is('enter')) {
      this.filtering = false
      this.input.blur()
      return [this, null]
    }
    var pair = this.input.update(msg)
    this.input = pair[0]
    this.filter = this.input.value
    this._applyFilter()
    return [this, pair[1]]
  }
  if (this.filterable && msg.is('/')) {
    this.filtering = true
    this.input.focus()
    return [this, null]
  }
  if (msg.is('up', 'k')) this.selected = Math.max(0, this.selected - 1)
  else if (msg.is('down', 'j'))
    this.selected = Math.min(this.filtered.length - 1, this.selected + 1)
  else if (msg.is('pageup'))
    this.selected = Math.max(0, this.selected - this.height)
  else if (msg.is('pagedown')) {
    this.selected = Math.min(
      this.filtered.length - 1,
      this.selected + this.height
    )
  }
  this._keepVisible()
  return [this, null]
}
BareTuiList.prototype.view = function () {
  var lines = []
  if (this.title) lines.push(this.title)
  if (this.filtering) lines.push('/' + this.input.value)
  var i
  for (i = 0; i < this.height; i++) {
    var idx = this.offset + i
    if (idx >= this.filtered.length) {
      lines.push('')
      continue
    }
    var item = this.items[this.filtered[idx]]
    var title = bareTuiItemTitle(item)
    if (this.width > 0) title = bareTuiTruncate(title, this.width)
    if (idx === this.selected) {
      title =
        bareTuiAnsi.modifierReverse + title + bareTuiAnsi.modifierNotReverse
    }
    lines.push(title)
  }
  return lines.join('\n')
}

var bareTuiList = {
  create: function (opts) {
    return new BareTuiList(opts)
  }
}

/* src/widgets/rest.js */
/** Progress, table, textarea, help, focus, stopwatch, timer, autocomplete. */

function BareTuiProgress(opts) {
  opts = opts || {}
  this.width = opts.width || 40
  this.full = opts.full || '█'
  this.empty = opts.empty || '░'
  this.showPercentage = opts.showPercentage !== false
}
BareTuiProgress.prototype.setWidth = function (n) {
  this.width = n
  return this
}
BareTuiProgress.prototype.view = function (percent) {
  percent = Math.max(0, Math.min(1, percent || 0))
  var reserve = this.showPercentage ? 5 : 0
  var w = Math.max(1, this.width - reserve)
  var filled = Math.round(w * percent)
  var gap = w - filled
  var bar = bareTuiRepeat(this.full, filled) + bareTuiRepeat(this.empty, gap)
  if (!this.showPercentage) return bar
  var pct = Math.round(percent * 100)
  var label = String(pct) + '%'
  while (label.length < 4) label = ' ' + label
  return bar + ' ' + label
}

function BareTuiTable(opts) {
  opts = opts || {}
  this.columns = opts.columns || []
  this.rows = opts.rows || []
  this.height = opts.height || 8
  this.selected = 0
  this.offset = 0
}
BareTuiTable.prototype.update = function (msg) {
  if (!msg || msg.type !== 'key') return [this, null]
  if (msg.is('up', 'k')) this.selected = Math.max(0, this.selected - 1)
  else if (msg.is('down', 'j'))
    this.selected = Math.min(this.rows.length - 1, this.selected + 1)
  if (this.selected < this.offset) this.offset = this.selected
  if (this.selected >= this.offset + this.height)
    this.offset = this.selected - this.height + 1
  return [this, null]
}
BareTuiTable.prototype.selectedRow = function () {
  return this.rows[this.selected] || null
}
BareTuiTable.prototype.view = function () {
  var lines = []
  var cols = this.columns
  var header = []
  var i
  for (i = 0; i < cols.length; i++) {
    var c = cols[i]
    header.push(typeof c === 'string' ? c : c.title || c.key || '')
  }
  lines.push(header.join('  '))
  var r
  for (r = 0; r < this.height; r++) {
    var idx = this.offset + r
    var row = this.rows[idx]
    if (!row) {
      lines.push('')
      continue
    }
    var cells = []
    for (i = 0; i < cols.length; i++) {
      var col = cols[i]
      var key = typeof col === 'string' ? col : col.key
      var val = Array.isArray(row) ? row[i] : row[key]
      cells.push(val == null ? '' : String(val))
    }
    var line = cells.join('  ')
    if (idx === this.selected)
      line = bareTuiAnsi.modifierReverse + line + bareTuiAnsi.modifierNotReverse
    lines.push(line)
  }
  return lines.join('\n')
}

function BareTuiTextarea(opts) {
  opts = opts || {}
  this.lines = String(opts.value || '').split('\n')
  if (!this.lines.length) this.lines = ['']
  this.width = opts.width || 40
  this.height = opts.height || 6
  this.placeholder = opts.placeholder || ''
  this.charLimit = opts.charLimit || 0
  this.focused = !!opts.focused
  this.row = 0
  this.col = 0
}
BareTuiTextarea.prototype.focus = function () {
  this.focused = true
  return this
}
BareTuiTextarea.prototype.blur = function () {
  this.focused = false
  return this
}
BareTuiTextarea.prototype.value = function () {
  return this.lines.join('\n')
}
BareTuiTextarea.prototype.update = function (msg) {
  if (!this.focused || !msg || msg.type !== 'key') return [this, null]
  var line = this.lines[this.row] || ''
  if (msg.is('up')) this.row = Math.max(0, this.row - 1)
  else if (msg.is('down'))
    this.row = Math.min(this.lines.length - 1, this.row + 1)
  else if (msg.is('left')) {
    if (this.col > 0) this.col--
    else if (this.row > 0) {
      this.row--
      this.col = (this.lines[this.row] || '').length
    }
  } else if (msg.is('right')) {
    if (this.col < line.length) this.col++
    else if (this.row < this.lines.length - 1) {
      this.row++
      this.col = 0
    }
  } else if (msg.is('enter')) {
    var left = line.slice(0, this.col)
    var right = line.slice(this.col)
    this.lines[this.row] = left
    this.lines.splice(this.row + 1, 0, right)
    this.row++
    this.col = 0
  } else if (msg.is('backspace')) {
    if (this.col > 0) {
      this.lines[this.row] = line.slice(0, this.col - 1) + line.slice(this.col)
      this.col--
    } else if (this.row > 0) {
      var prev = this.lines[this.row - 1]
      this.col = prev.length
      this.lines[this.row - 1] = prev + line
      this.lines.splice(this.row, 1)
      this.row--
    }
  } else if (
    !msg.ctrl &&
    !msg.meta &&
    msg.sequence &&
    msg.sequence.length === 1 &&
    msg.sequence >= ' '
  ) {
    var all = this.value()
    if (this.charLimit && all.length >= this.charLimit) return [this, null]
    this.lines[this.row] =
      line.slice(0, this.col) + msg.sequence + line.slice(this.col)
    this.col++
  }
  if (this.col > (this.lines[this.row] || '').length)
    this.col = (this.lines[this.row] || '').length
  return [this, null]
}
BareTuiTextarea.prototype.view = function () {
  if (!this.value() && this.placeholder && !this.focused) {
    return bareTuiAnsi.modifierDim + this.placeholder + bareTuiAnsi.reset
  }
  var out = []
  var i
  for (i = 0; i < this.height; i++) {
    var line = this.lines[i] || ''
    if (this.focused && i === this.row) {
      var at = line.slice(this.col, this.col + 1) || ' '
      line =
        line.slice(0, this.col) +
        bareTuiAnsi.modifierReverse +
        at +
        bareTuiAnsi.modifierNotReverse +
        line.slice(this.col + 1)
    }
    if (this.width > 0) line = bareTuiTruncate(line, this.width)
    out.push(line)
  }
  return out.join('\n')
}

function BareTuiHelp() {}
BareTuiHelp.prototype.view = function (keymap) {
  if (!keymap) return ''
  var parts = []
  var k
  for (k in keymap) {
    if (!Object.prototype.hasOwnProperty.call(keymap, k)) continue
    var b = keymap[k]
    var help = b && b.help
    if (help) parts.push((help.key || k) + ' ' + (help.desc || ''))
    else if (b && b.keys) parts.push(b.keys.join('/') + ' ' + k)
  }
  return parts.join(' · ')
}

function BareTuiFocus(opts) {
  opts = opts || {}
  this.items = opts.items ? opts.items.slice() : []
  this.index = opts.index || 0
  this._clamp()
  this._sync()
}
BareTuiFocus.prototype.focused = function () {
  return this.items[this.index] || null
}
BareTuiFocus.prototype.setItems = function (items) {
  this.items = items ? items.slice() : []
  this._clamp()
  this._sync()
  return this
}
BareTuiFocus.prototype.focus = function (i) {
  this.index = i
  this._clamp()
  this._sync()
  return this
}
BareTuiFocus.prototype.next = function () {
  this._move(1)
  return this
}
BareTuiFocus.prototype.prev = function () {
  this._move(-1)
  return this
}
BareTuiFocus.prototype.update = function (msg) {
  if (msg && msg.type === 'key' && msg.is('shift+tab')) {
    this._move(-1)
    return [this, null]
  }
  if (msg && msg.type === 'key' && msg.is('tab')) {
    this._move(1)
    return [this, null]
  }
  var cur = this.items[this.index]
  if (cur && typeof cur.update === 'function') {
    var pair = cur.update(msg)
    this.items[this.index] = pair[0]
    return [this, pair[1]]
  }
  return [this, null]
}
BareTuiFocus.prototype._move = function (dir) {
  if (this.items.length < 2) return
  this.index = (this.index + dir + this.items.length) % this.items.length
  this._sync()
}
BareTuiFocus.prototype._clamp = function () {
  if (!this.items.length) this.index = 0
  else {
    if (this.index < 0) this.index = 0
    if (this.index > this.items.length - 1) this.index = this.items.length - 1
  }
}
BareTuiFocus.prototype._sync = function () {
  var i
  for (i = 0; i < this.items.length; i++) {
    var it = this.items[i]
    if (!it) continue
    if (i === this.index) {
      if (typeof it.focus === 'function') it.focus()
    } else if (typeof it.blur === 'function') it.blur()
  }
}

function BareTuiStopwatch(opts) {
  opts = opts || {}
  this.interval = opts.interval || 100
  this.elapsed = 0
  this.running = false
  this.id = bareTuiNextWidgetId++
  this.tag = 0
  this._last = 0
}
BareTuiStopwatch.prototype.start = function () {
  if (this.running) return this
  this.running = true
  this._last = Date.now()
  return this
}
BareTuiStopwatch.prototype.stop = function () {
  this.running = false
  return this
}
BareTuiStopwatch.prototype.toggle = function () {
  return this.running ? this.stop() : this.start()
}
BareTuiStopwatch.prototype.reset = function () {
  this.elapsed = 0
  this._last = Date.now()
  return this
}
BareTuiStopwatch.prototype.init = function () {
  return this._tick()
}
BareTuiStopwatch.prototype._tick = function () {
  var id = this.id
  var tag = this.tag
  var ms = this.interval
  return bareTuiTick(ms, function () {
    return { type: 'stopwatch.tick', id: id, tag: tag }
  })
}
BareTuiStopwatch.prototype.update = function (msg) {
  if (msg && msg.type === 'key' && msg.is('space')) {
    this.toggle()
    return [this, null]
  }
  if (
    !msg ||
    msg.type !== 'stopwatch.tick' ||
    msg.id !== this.id ||
    msg.tag !== this.tag
  ) {
    return [this, null]
  }
  if (this.running) {
    var now = Date.now()
    this.elapsed += now - this._last
    this._last = now
  }
  this.tag++
  return [this, this._tick()]
}
BareTuiStopwatch.prototype.view = function () {
  var ms = this.elapsed
  var s = Math.floor(ms / 1000)
  var m = Math.floor(s / 60)
  s = s % 60
  var mm = m < 10 ? '0' + m : String(m)
  var ss = s < 10 ? '0' + s : String(s)
  return mm + ':' + ss
}

function BareTuiTimer(opts) {
  opts = opts || {}
  this.timeout = opts.timeout || 10000
  this.interval = opts.interval || 100
  this.remaining = this.timeout
  this.running = true
  this.id = bareTuiNextWidgetId++
  this.tag = 0
  this._last = Date.now()
}
BareTuiTimer.prototype.init = function () {
  return this._tick()
}
BareTuiTimer.prototype._tick = function () {
  var id = this.id
  var tag = this.tag
  var ms = this.interval
  return bareTuiTick(ms, function () {
    return { type: 'timer.tick', id: id, tag: tag }
  })
}
BareTuiTimer.prototype.update = function (msg) {
  if (
    !msg ||
    msg.type !== 'timer.tick' ||
    msg.id !== this.id ||
    msg.tag !== this.tag
  ) {
    return [this, null]
  }
  if (this.running) {
    var now = Date.now()
    this.remaining -= now - this._last
    this._last = now
    if (this.remaining <= 0) {
      this.remaining = 0
      this.running = false
      this.tag++
      return [
        this,
        function () {
          return { type: 'timer.timeout' }
        }
      ]
    }
  }
  this.tag++
  return [this, this._tick()]
}
BareTuiTimer.prototype.view = function () {
  var s = Math.ceil(this.remaining / 1000)
  return String(s) + 's'
}

function BareTuiAutocomplete(opts) {
  opts = opts || {}
  this.input = bareTuiTextinput.create({
    prompt: opts.prompt || '',
    placeholder: opts.placeholder || '',
    focused: opts.focused
  })
  this.suggestions = opts.suggestions || []
  this.trigger = opts.trigger || ''
  this.filtered = []
  this.selected = 0
  this.open = false
}
BareTuiAutocomplete.prototype.focus = function () {
  this.input.focus()
  return this
}
BareTuiAutocomplete.prototype.blur = function () {
  this.input.blur()
  this.open = false
  return this
}
BareTuiAutocomplete.prototype.value = function () {
  return this.input.value
}
BareTuiAutocomplete.prototype._refresh = function () {
  var q = this.input.value
  if (this.trigger && q.indexOf(this.trigger) < 0) {
    this.open = false
    this.filtered = []
    return
  }
  var needle = q.toLowerCase()
  this.filtered = []
  var i
  for (i = 0; i < this.suggestions.length; i++) {
    var s = String(this.suggestions[i])
    if (!needle || s.toLowerCase().indexOf(needle) >= 0) this.filtered.push(s)
  }
  this.open = this.filtered.length > 0
  if (this.selected >= this.filtered.length) this.selected = 0
}
BareTuiAutocomplete.prototype.update = function (msg) {
  if (!this.input.focused || !msg || msg.type !== 'key') return [this, null]
  if (this.open && msg.is('down')) {
    this.selected = Math.min(this.filtered.length - 1, this.selected + 1)
    return [this, null]
  }
  if (this.open && msg.is('up')) {
    this.selected = Math.max(0, this.selected - 1)
    return [this, null]
  }
  if (this.open && msg.is('enter', 'tab')) {
    if (this.filtered[this.selected] != null)
      this.input.setValue(this.filtered[this.selected])
    this.open = false
    return [this, null]
  }
  var pair = this.input.update(msg)
  this.input = pair[0]
  this._refresh()
  return [this, pair[1]]
}
BareTuiAutocomplete.prototype.view = function () {
  var out = this.input.view()
  if (!this.open) return out
  var i
  for (i = 0; i < this.filtered.length && i < 6; i++) {
    var line = this.filtered[i]
    if (i === this.selected)
      line = bareTuiAnsi.modifierReverse + line + bareTuiAnsi.modifierNotReverse
    out += '\n' + line
  }
  return out
}

var bareTuiProgress = {
  create: function (opts) {
    return new BareTuiProgress(opts)
  }
}
var bareTuiTable = {
  create: function (opts) {
    return new BareTuiTable(opts)
  }
}
var bareTuiTextarea = {
  create: function (opts) {
    return new BareTuiTextarea(opts)
  }
}
var bareTuiHelp = {
  create: function () {
    return new BareTuiHelp()
  }
}
var bareTuiFocus = {
  create: function (opts) {
    return new BareTuiFocus(opts)
  }
}
var bareTuiStopwatch = {
  create: function (opts) {
    return new BareTuiStopwatch(opts)
  }
}
var bareTuiTimer = {
  create: function (opts) {
    return new BareTuiTimer(opts)
  }
}
var bareTuiAutocomplete = {
  create: function (opts) {
    return new BareTuiAutocomplete(opts)
  }
}

/* src/widgets/filepicker.js */
/** VFS file picker. Inject vfs (or mock). Never opens host fs. */

function bareTuiJoinPath(a, b) {
  var left = String(a == null ? '/' : a)
  var right = String(b == null ? '' : b).replace(/^\/+/, '')
  if (!left || left === '/') return '/' + right
  return left.replace(/\/+$/, '') + '/' + right
}

function bareTuiDirname(p) {
  p = String(p || '/').replace(/\/+$/, '')
  if (!p) return '/'
  var i = p.lastIndexOf('/')
  if (i <= 0) return '/'
  return p.slice(0, i)
}

function bareTuiSortEntries(entries, showHidden) {
  var out = []
  var i
  for (i = 0; i < entries.length; i++) {
    if (showHidden || String(entries[i].name).charAt(0) !== '.')
      out.push(entries[i])
  }
  out.sort(function (a, b) {
    if (a.directory !== b.directory) return a.directory ? -1 : 1
    if (a.name < b.name) return -1
    if (a.name > b.name) return 1
    return 0
  })
  return out
}

function bareTuiIsDirStat(st) {
  if (!st) return false
  if (st.type === 'directory') return true
  if (typeof st.isDirectory === 'function') return !!st.isDirectory()
  return false
}

function bareTuiListVfs(vfs, dir) {
  if (!vfs || typeof vfs.readdir !== 'function') {
    return Promise.reject(new Error('filepicker: vfs.readdir missing'))
  }
  return Promise.resolve(vfs.readdir(dir)).then(function (names) {
    var list = names || []
    var i = 0
    var entries = []
    function next() {
      if (i >= list.length) return entries
      var name = list[i++]
      if (name && typeof name === 'object' && name.name) {
        var directory = !!(
          name.directory ||
          (typeof name.isDirectory === 'function' && name.isDirectory())
        )
        entries.push({ name: name.name, directory: directory })
        return next()
      }
      var full = bareTuiJoinPath(dir, name)
      if (typeof vfs.stat !== 'function') {
        entries.push({ name: String(name), directory: false })
        return next()
      }
      return Promise.resolve(vfs.stat(full)).then(
        function (st) {
          entries.push({ name: String(name), directory: bareTuiIsDirStat(st) })
          return next()
        },
        function () {
          entries.push({ name: String(name), directory: false })
          return next()
        }
      )
    }
    return next()
  })
}

function BareTuiFilepicker(opts) {
  opts = opts || {}
  this.vfs = opts.vfs
  this.cwd = opts.cwd || '/'
  this.height = opts.height || 12
  this.showHidden = !!opts.showHidden
  this.pick = opts.pick === 'dir' ? 'dir' : opts.pick === 'any' ? 'any' : 'file'
  this.filter = typeof opts.filter === 'function' ? opts.filter : null
  this.entries = []
  this.cursor = 0
  this.offset = 0
  this.selected = null
  this.error = null
  this.loading = true
}

BareTuiFilepicker.prototype.init = function () {
  return this._read(this.cwd)
}

BareTuiFilepicker.prototype.selectedPath = function () {
  return this.selected
}

BareTuiFilepicker.prototype._read = function (dir) {
  var vfs = this.vfs
  var showHidden = this.showHidden
  var filter = this.filter
  return function () {
    return bareTuiListVfs(vfs, dir).then(
      function (entries) {
        if (filter) {
          var kept = []
          var i
          for (i = 0; i < entries.length; i++) {
            if (filter(entries[i].name, entries[i])) kept.push(entries[i])
          }
          entries = kept
        }
        return {
          type: 'filepicker.entries',
          dir: dir,
          entries: bareTuiSortEntries(entries, showHidden)
        }
      },
      function (err) {
        return {
          type: 'filepicker.error',
          dir: dir,
          error: (err && err.message) || String(err)
        }
      }
    )
  }
}

BareTuiFilepicker.prototype.update = function (msg) {
  if (!msg) return [this, null]
  if (msg.type === 'filepicker.entries' && msg.dir === this.cwd) {
    this.entries = msg.entries || []
    this.cursor = 0
    this.offset = 0
    this.loading = false
    this.error = null
    return [this, null]
  }
  if (msg.type === 'filepicker.error' && msg.dir === this.cwd) {
    this.error = msg.error
    this.entries = []
    this.loading = false
    return [this, null]
  }
  if (msg.type === 'key') return this._key(msg)
  return [this, null]
}

BareTuiFilepicker.prototype._open = function (dir) {
  this.cwd = dir
  this.loading = true
  return [this, this._read(dir)]
}

BareTuiFilepicker.prototype._move = function (delta) {
  if (!this.entries.length) return
  this.cursor = Math.max(
    0,
    Math.min(this.cursor + delta, this.entries.length - 1)
  )
  if (this.cursor < this.offset) this.offset = this.cursor
  else if (this.cursor >= this.offset + this.height)
    this.offset = this.cursor - this.height + 1
}

BareTuiFilepicker.prototype._choose = function (full) {
  this.selected = full
  return [
    this,
    function () {
      return { type: 'filepicker.select', path: full }
    }
  ]
}

BareTuiFilepicker.prototype._key = function (msg) {
  if (msg.is('up', 'k')) {
    this._move(-1)
    return [this, null]
  }
  if (msg.is('down', 'j')) {
    this._move(1)
    return [this, null]
  }
  if (msg.is('backspace', 'left', 'h'))
    return this._open(bareTuiDirname(this.cwd))
  var entry = this.entries[this.cursor]
  if (!entry) return [this, null]
  var full = bareTuiJoinPath(this.cwd, entry.name)
  if (this.pick === 'dir') {
    if (!entry.directory) return [this, null]
    if (msg.is('right', 'l')) return this._open(full)
    if (msg.is('enter')) return this._choose(full)
    return [this, null]
  }
  if (msg.is('enter', 'right', 'l')) {
    if (entry.directory) return this._open(full)
    return this._choose(full)
  }
  return [this, null]
}

BareTuiFilepicker.prototype.view = function () {
  var lines = [this.cwd || '/']
  var rows = []
  if (this.loading) rows.push('  loading…')
  else if (this.error) rows.push('  ! ' + this.error)
  else if (!this.entries.length) rows.push('  (empty)')
  else {
    var end = Math.min(this.offset + this.height, this.entries.length)
    var p
    for (p = this.offset; p < end; p++) {
      var entry = this.entries[p]
      var label = entry.directory ? entry.name + '/' : entry.name
      var text = (p === this.cursor ? '› ' : '  ') + label
      if (p === this.cursor) {
        text =
          bareTuiAnsi.modifierReverse + text + bareTuiAnsi.modifierNotReverse
      }
      rows.push(text)
    }
  }
  while (rows.length < this.height) rows.push('')
  return lines.concat(rows).join('\n')
}

function bareTuiMockResolve(tree, root, p) {
  if (p === root) return tree
  var rel = p
  if (root !== '/' && String(p).indexOf(root) === 0) rel = p.slice(root.length)
  var segs = String(rel).split('/').filter(Boolean)
  var node = tree
  var i
  for (i = 0; i < segs.length; i++) {
    if (node && typeof node === 'object' && segs[i] in node)
      node = node[segs[i]]
    else return undefined
  }
  return node
}

function bareTuiFilepickerMock(tree, opts) {
  opts = opts || {}
  var root = opts.root || '/'
  function readdir(dir) {
    var node = bareTuiMockResolve(tree, root, dir)
    if (!node || typeof node !== 'object') {
      return Promise.reject(new Error('ENOTDIR: ' + dir))
    }
    return Promise.resolve(Object.keys(node))
  }
  function stat(p) {
    var node = bareTuiMockResolve(tree, root, p)
    if (node === undefined) return Promise.reject(new Error('ENOENT: ' + p))
    var directory = !!(node && typeof node === 'object')
    return Promise.resolve({ type: directory ? 'directory' : 'file' })
  }
  return {
    root: root,
    vfs: { readdir: readdir, stat: stat },
    path: { join: bareTuiJoinPath, dirname: bareTuiDirname }
  }
}

function bareTuiFilepickerCreate(ctx, opts) {
  opts = opts || {}
  var vfs = opts.vfs
  if (!vfs && ctx && ctx.vfs) vfs = ctx.vfs
  var cwd = opts.cwd
  if (!cwd && ctx && ctx.env) cwd = ctx.env.PWD || ctx.env.HOME
  if (!cwd) cwd = '/'
  return new BareTuiFilepicker({
    vfs: vfs,
    cwd: cwd,
    height: opts.height,
    showHidden: opts.showHidden,
    pick: opts.pick,
    filter: opts.filter
  })
}

var bareTuiFilepicker = {
  create: null,
  mock: bareTuiFilepickerMock
}

/* src/widgets/oneshot.js */
/** One-shot confirm / prompt / choose models and runners. */

function bareTuiBox(title, body, hint) {
  var inner = (title ? title + '\n\n' : '') + body + (hint ? '\n\n' + hint : '')
  return inner
}

function BareTuiConfirmApp(opts) {
  opts = opts || {}
  this.title = opts.title || 'Confirm'
  this.body = opts.body || opts.message || ''
  this.okLabel = opts.ok || 'Yes'
  this.cancelLabel = opts.cancel || 'No'
  this.result = false
}

BareTuiConfirmApp.prototype.update = function (msg) {
  if (!msg || msg.type !== 'key') return [this, null]
  if (msg.is('y', 'Y', 'enter')) {
    this.result = true
    return [this, bareTuiQuitCmd]
  }
  if (msg.is('n', 'N', 'escape', 'ctrl+c')) {
    this.result = false
    return [this, bareTuiQuitCmd]
  }
  return [this, null]
}

BareTuiConfirmApp.prototype.view = function () {
  return bareTuiBox(
    this.title,
    this.body,
    this.okLabel + ' (y/enter) · ' + this.cancelLabel + ' (n/esc)'
  )
}

function BareTuiPromptApp(opts) {
  opts = opts || {}
  this.title = opts.title || ''
  this.label = opts.label || opts.prompt || '> '
  this.field = bareTuiTextinput.create({
    prompt: this.label,
    placeholder: opts.placeholder || '',
    echoMode: opts.echoMode || 'normal',
    focused: true,
    value: opts.value || ''
  })
  this.result = null
  this.cancelled = false
}

BareTuiPromptApp.prototype.update = function (msg) {
  if (!msg || msg.type !== 'key') return [this, null]
  if (msg.is('enter')) {
    this.result = this.field.value
    return [this, bareTuiQuitCmd]
  }
  if (msg.is('escape', 'ctrl+c')) {
    this.cancelled = true
    this.result = null
    return [this, bareTuiQuitCmd]
  }
  var pair = this.field.update(msg)
  this.field = pair[0]
  return [this, pair[1]]
}

BareTuiPromptApp.prototype.view = function () {
  return bareTuiBox(this.title, this.field.view(), 'enter accept · esc cancel')
}

function BareTuiChooseApp(opts) {
  opts = opts || {}
  this.title = opts.title || 'Choose'
  var items = opts.options || opts.items || []
  this.list = bareTuiList.create({
    items: items,
    height: opts.height || Math.min(8, Math.max(3, items.length)),
    filterable: opts.filterable === true,
    title: ''
  })
  this.result = null
  this.cancelled = false
}

BareTuiChooseApp.prototype.update = function (msg) {
  if (!msg || msg.type !== 'key') return [this, null]
  if (msg.is('enter')) {
    this.result = this.list.selectedItem()
    return [this, bareTuiQuitCmd]
  }
  if (msg.is('escape', 'q', 'ctrl+c')) {
    this.cancelled = true
    this.result = null
    return [this, bareTuiQuitCmd]
  }
  var pair = this.list.update(msg)
  this.list = pair[0]
  return [this, pair[1]]
}

BareTuiChooseApp.prototype.view = function () {
  return bareTuiBox(this.title, this.list.view(), 'enter select · q/esc cancel')
}

function bareTuiConfirm(ctx, opts) {
  var app = new BareTuiConfirmApp(opts)
  return bareTuiRunProgram(ctx, app, opts).then(function () {
    return app.result
  })
}

function bareTuiPrompt(ctx, opts) {
  var app = new BareTuiPromptApp(opts)
  return bareTuiRunProgram(ctx, app, opts).then(function () {
    return app.result
  })
}

function bareTuiChoose(ctx, opts) {
  var app = new BareTuiChooseApp(opts)
  return bareTuiRunProgram(ctx, app, opts).then(function () {
    return app.result
  })
}

/* src/widgets/form.js */
/** Declarative form: fields + focus + validate. Emits form.submit / form.cancel. */

function bareTuiFormFieldValue(field) {
  if (!field) return undefined
  var c = field.control
  if (c && typeof c.value === 'function') return c.value()
  if (c && c.value != null && typeof c.value !== 'function') return c.value
  if (c && c.checked != null) return !!c.checked
  if (field.checked != null) return !!field.checked
  return field._value
}

function BareTuiFormField(def) {
  def = def || {}
  this.name = def.name || ''
  this.label = def.label || this.name
  this.description = def.description || def.help || ''
  this.required = !!def.required
  this.requiredMessage = def.requiredMessage || 'required'
  this.validate = def.validate || null
  this.type = def.type || 'text'
  this.hidden = !!def.hidden
  this.readonly = !!def.readonly
  this.error = ''
  this.control = def.control || null
}

BareTuiFormField.prototype.focus = function () {
  if (this.control && typeof this.control.focus === 'function')
    this.control.focus()
  return this
}
BareTuiFormField.prototype.blur = function () {
  if (this.control && typeof this.control.blur === 'function')
    this.control.blur()
  return this
}
BareTuiFormField.prototype.value = function () {
  return bareTuiFormFieldValue(this)
}
BareTuiFormField.prototype.check = function () {
  this.error = ''
  if (this.hidden) return true
  var v = this.value()
  var empty = v == null || v === '' || v === false
  if (this.required && empty) {
    this.error = this.requiredMessage
    return false
  }
  if (
    this.type === 'number' &&
    v != null &&
    v !== '' &&
    typeof v === 'number' &&
    !isFinite(v)
  ) {
    this.error = 'not a number'
    return false
  }
  if (typeof this.validate === 'function') {
    var r = this.validate(v)
    if (r === false) {
      this.error = 'invalid'
      return false
    }
    if (typeof r === 'string' && r) {
      this.error = r
      return false
    }
  }
  return true
}
BareTuiFormField.prototype.update = function (msg) {
  if (
    this.readonly ||
    !this.control ||
    typeof this.control.update !== 'function'
  ) {
    return [this, null]
  }
  var pair = this.control.update(msg)
  this.control = pair[0]
  return [this, pair[1]]
}
BareTuiFormField.prototype.view = function () {
  var lines = []
  var lab = this.label || this.name
  if (lab) lines.push(lab + (this.required ? ' *' : ''))
  if (this.description) lines.push(this.description)
  if (this.control && typeof this.control.view === 'function')
    lines.push(this.control.view())
  if (this.control && typeof this.control.menuView === 'function') {
    var menu = this.control.menuView()
    if (menu) lines.push(menu)
  }
  if (this.error) lines.push('! ' + this.error)
  return lines.join('\n')
}

function bareTuiFormBuildControl(def) {
  var type = def.type || 'text'
  if (type === 'textarea') {
    return bareTuiTextarea.create({
      value: def.value || '',
      placeholder: def.placeholder || '',
      rows: def.rows,
      height: def.rows || 4,
      focused: !!def.autofocus
    })
  }
  if (type === 'checkbox' || type === 'confirm') {
    return bareTuiCheckbox.create({
      label: '',
      checked: !!def.value || !!def.checked,
      focused: !!def.autofocus
    })
  }
  if (type === 'radio') {
    return bareTuiRadio.create({
      options: def.options || [],
      selected: def.selected || 0,
      focused: !!def.autofocus
    })
  }
  if (type === 'select') {
    return bareTuiSelect.create({
      options: def.options || [],
      placeholder: def.placeholder || '',
      selected: def.selected || 0,
      focused: !!def.autofocus
    })
  }
  if (type === 'multiselect') {
    return bareTuiList.create({
      items: def.options || [],
      height: def.height || 6,
      filterable: false
    })
  }
  var echo = def.echoMode || (type === 'password' ? 'password' : 'normal')
  return bareTuiTextinput.create({
    value: def.value != null ? String(def.value) : '',
    placeholder: def.placeholder || '',
    echoMode: echo,
    focused: !!def.autofocus
  })
}

function bareTuiFormFromDef(def) {
  if (def instanceof BareTuiFormField) return def
  if (def && def.control) return new BareTuiFormField(def)
  def = def || {}
  var control = bareTuiFormBuildControl(def)
  var field = new BareTuiFormField(def)
  field.control = control
  if (field.type === 'number') {
    field.value = function () {
      var raw = field.control && field.control.value
      if (raw == null || raw === '') return null
      var n = parseFloat(raw)
      return isFinite(n) ? n : NaN
    }
  }
  if (field.type === 'checkbox' || field.type === 'confirm') {
    field.value = function () {
      return !!(field.control && field.control.checked)
    }
  }
  if (field.type === 'radio' || field.type === 'select') {
    field.value = function () {
      return field.control && typeof field.control.value === 'function'
        ? field.control.value()
        : null
    }
  }
  return field
}

function bareTuiFormText(opts) {
  opts = opts || {}
  opts.type = opts.type || 'text'
  return bareTuiFormFromDef(opts)
}
function bareTuiFormTextarea(opts) {
  opts = opts || {}
  opts.type = 'textarea'
  return bareTuiFormFromDef(opts)
}
function bareTuiFormNumber(opts) {
  opts = opts || {}
  opts.type = 'number'
  return bareTuiFormFromDef(opts)
}
function bareTuiFormSelect(opts) {
  opts = opts || {}
  opts.type = 'select'
  return bareTuiFormFromDef(opts)
}
function bareTuiFormRadio(opts) {
  opts = opts || {}
  opts.type = 'radio'
  return bareTuiFormFromDef(opts)
}
function bareTuiFormConfirm(opts) {
  opts = opts || {}
  opts.type = 'confirm'
  return bareTuiFormFromDef(opts)
}

function BareTuiForm(opts) {
  opts = opts || {}
  this.title = opts.title || ''
  this.fields = []
  var raw = opts.fields || []
  var i
  for (i = 0; i < raw.length; i++) this.fields.push(bareTuiFormFromDef(raw[i]))
  this.index = 0
  this._sync()
}

BareTuiForm.prototype._visible = function () {
  var out = []
  var i
  for (i = 0; i < this.fields.length; i++) {
    if (!this.fields[i].hidden) out.push(this.fields[i])
  }
  return out
}

BareTuiForm.prototype._sync = function () {
  var vis = this._visible()
  if (this.index >= vis.length) this.index = Math.max(0, vis.length - 1)
  var i
  for (i = 0; i < vis.length; i++) {
    if (i === this.index) vis[i].focus()
    else vis[i].blur()
  }
}

BareTuiForm.prototype.value = function () {
  var o = {}
  var i
  for (i = 0; i < this.fields.length; i++) {
    var f = this.fields[i]
    if (f.hidden || !f.name) continue
    o[f.name] = f.value()
  }
  return o
}

BareTuiForm.prototype.errors = function () {
  var o = {}
  var i
  for (i = 0; i < this.fields.length; i++) {
    if (this.fields[i].error) o[this.fields[i].name] = this.fields[i].error
  }
  return o
}

BareTuiForm.prototype._submit = function () {
  var ok = true
  var i
  for (i = 0; i < this.fields.length; i++) {
    if (!this.fields[i].check()) ok = false
  }
  if (!ok) return [this, null]
  var values = this.value()
  return [
    this,
    function () {
      return { type: 'form.submit', values: values }
    }
  ]
}

BareTuiForm.prototype.update = function (msg) {
  if (!msg || msg.type !== 'key') return [this, null]
  if (msg.is('ctrl+c')) {
    return [
      this,
      function () {
        return { type: 'form.cancel' }
      }
    ]
  }
  if (msg.is('ctrl+s')) return this._submit()
  var vis = this._visible()
  if (msg.is('shift+tab')) {
    this.index = (this.index - 1 + vis.length) % Math.max(1, vis.length)
    this._sync()
    return [this, null]
  }
  if (msg.is('tab')) {
    this.index = (this.index + 1) % Math.max(1, vis.length)
    this._sync()
    return [this, null]
  }
  if (msg.is('enter')) {
    var cur = vis[this.index]
    if (cur && (cur.type === 'select' || cur.type === 'textarea')) {
      var p0 = cur.update(msg)
      this._replace(cur, p0[0])
      return [this, p0[1]]
    }
    if (this.index < vis.length - 1) {
      this.index++
      this._sync()
      return [this, null]
    }
    return this._submit()
  }
  var focused = vis[this.index]
  if (!focused) return [this, null]
  var pair = focused.update(msg)
  this._replace(focused, pair[0])
  return [this, pair[1]]
}

BareTuiForm.prototype._replace = function (oldF, next) {
  var i
  for (i = 0; i < this.fields.length; i++) {
    if (this.fields[i] === oldF) this.fields[i] = next
  }
}

BareTuiForm.prototype.view = function () {
  var lines = []
  if (this.title) lines.push(this.title, '')
  var vis = this._visible()
  var i
  for (i = 0; i < vis.length; i++) {
    lines.push(vis[i].view())
    lines.push('')
  }
  lines.push('tab next · ctrl+s submit · ctrl+c cancel')
  return lines.join('\n')
}

function bareTuiFormCreate(opts) {
  return new BareTuiForm(opts)
}

function bareTuiFormRun(ctx, form, opts) {
  var host = {
    form: form,
    result: undefined,
    update: function (msg) {
      if (msg && msg.type === 'form.submit') {
        this.result = msg.values
        return [this, bareTuiQuitCmd]
      }
      if (msg && msg.type === 'form.cancel') {
        this.result = null
        return [this, bareTuiQuitCmd]
      }
      var pair = this.form.update(msg)
      this.form = pair[0]
      return [this, pair[1]]
    },
    view: function () {
      return this.form.view()
    }
  }
  return bareTuiRunProgram(ctx, host, opts).then(function () {
    return host.result
  })
}

var bareTuiForm = {
  create: bareTuiFormCreate,
  run: null,
  text: bareTuiFormText,
  textarea: bareTuiFormTextarea,
  number: bareTuiFormNumber,
  select: bareTuiFormSelect,
  radio: bareTuiFormRadio,
  confirm: bareTuiFormConfirm
}

/* src/widgets/extras.js */
/** Extra widgets: tabs, modal, dialog, tree, statusbar, split, toast, markdown. */

function BareTuiTabs(opts) {
  opts = opts || {}
  this.tabs = opts.tabs ? opts.tabs.slice() : []
  this.index = opts.index || 0
}
BareTuiTabs.prototype.active = function () {
  return this.tabs[this.index] || null
}
BareTuiTabs.prototype.update = function (msg) {
  if (!msg || msg.type !== 'key') return [this, null]
  if (msg.is('left', 'h')) this.index = Math.max(0, this.index - 1)
  else if (msg.is('right', 'l'))
    this.index = Math.min(this.tabs.length - 1, this.index + 1)
  else if (msg.name && /^[1-9]$/.test(msg.name)) {
    var n = parseInt(msg.name, 10) - 1
    if (n < this.tabs.length) this.index = n
  } else {
    var tab = this.active()
    if (tab && tab.model && typeof tab.model.update === 'function') {
      var pair = tab.model.update(msg)
      tab.model = pair[0]
      return [this, pair[1]]
    }
  }
  return [this, null]
}
BareTuiTabs.prototype.view = function () {
  var bar = []
  var i
  for (i = 0; i < this.tabs.length; i++) {
    var title = this.tabs[i].title || String(i + 1)
    if (i === this.index) title = '[' + title + ']'
    bar.push(title)
  }
  var body = ''
  var tab = this.active()
  if (tab) {
    if (tab.model && typeof tab.model.view === 'function')
      body = tab.model.view()
    else if (tab.body != null) body = String(tab.body)
    else if (tab.view)
      body = typeof tab.view === 'function' ? tab.view() : String(tab.view)
  }
  return bar.join('  ') + '\n' + body
}

function BareTuiModal(opts) {
  opts = opts || {}
  this.child = opts.child || null
  this.open = !!opts.open
  this.title = opts.title || ''
}
BareTuiModal.prototype.show = function () {
  this.open = true
  return this
}
BareTuiModal.prototype.hide = function () {
  this.open = false
  return this
}
BareTuiModal.prototype.update = function (msg) {
  if (this.open && msg && msg.type === 'key' && msg.is('escape')) {
    this.open = false
    return [this, null]
  }
  if (this.child && typeof this.child.update === 'function') {
    var pair = this.child.update(msg)
    this.child = pair[0]
    return [this, pair[1]]
  }
  return [this, null]
}
BareTuiModal.prototype.view = function () {
  if (this.child && typeof this.child.view === 'function')
    return this.child.view()
  return ''
}

BareTuiModal.prototype.frame = function () {
  var inner = this.view()
  if (!this.open) return inner
  return (this.title || 'dialog') + '\n' + inner + '\n(esc close)'
}

BareTuiModal.prototype.overlay = function (size) {
  if (!this.open) return null
  var inner = ''
  if (this.child && typeof this.child.view === 'function')
    inner = this.child.view()
  var body = (this.title || 'dialog') + '\n' + inner + '\n(esc close)'
  var boxed = body
  var h = bareTuiBlockHeight(boxed)
  var w = bareTuiBlockWidth(boxed)
  var rows = (size && size.height) || 24
  var cols = (size && size.width) || 80
  return {
    row: Math.max(0, Math.floor((rows - h) / 2)),
    col: Math.max(0, Math.floor((cols - w) / 2)),
    text: boxed
  }
}

function BareTuiDialog(opts) {
  opts = opts || {}
  this.title = opts.title || ''
  this.body = opts.body || opts.message || ''
  this.buttons = opts.buttons || ['OK']
  this.index = opts.index || 0
  this.choice = null
}
BareTuiDialog.prototype.update = function (msg) {
  if (!msg || msg.type !== 'key') return [this, null]
  if (msg.is('left', 'h')) this.index = Math.max(0, this.index - 1)
  else if (msg.is('right', 'l'))
    this.index = Math.min(this.buttons.length - 1, this.index + 1)
  else if (msg.is('enter', 'space')) {
    this.choice = this.buttons[this.index]
    var choice = this.choice
    return [
      this,
      function () {
        return { type: 'dialog.choose', value: choice }
      }
    ]
  } else if (msg.is('escape', 'ctrl+c')) {
    this.choice = null
    return [
      this,
      function () {
        return { type: 'dialog.choose', value: null }
      }
    ]
  }
  return [this, null]
}
BareTuiDialog.prototype.view = function () {
  var btns = []
  var i
  for (i = 0; i < this.buttons.length; i++) {
    var b = this.buttons[i]
    btns.push(i === this.index ? '[' + b + ']' : ' ' + b + ' ')
  }
  return (
    (this.title ? this.title + '\n' : '') + this.body + '\n' + btns.join('  ')
  )
}

function BareTuiTree(opts) {
  opts = opts || {}
  this.items = opts.items ? opts.items.slice() : []
  this.cursor = 0
}
function bareTuiTreeFlat(items, depth, out) {
  var i
  for (i = 0; i < items.length; i++) {
    var it = items[i]
    out.push({ item: it, depth: depth })
    if (it.open && it.children && it.children.length) {
      bareTuiTreeFlat(it.children, depth + 1, out)
    }
  }
}
BareTuiTree.prototype._flat = function () {
  var out = []
  bareTuiTreeFlat(this.items, 0, out)
  return out
}
BareTuiTree.prototype.selectedItem = function () {
  var flat = this._flat()
  return flat[this.cursor] ? flat[this.cursor].item : null
}
BareTuiTree.prototype.update = function (msg) {
  if (!msg || msg.type !== 'key') return [this, null]
  var flat = this._flat()
  if (msg.is('up', 'k')) this.cursor = Math.max(0, this.cursor - 1)
  else if (msg.is('down', 'j'))
    this.cursor = Math.min(flat.length - 1, this.cursor + 1)
  else if (msg.is('right', 'l', 'enter')) {
    var it = this.selectedItem()
    if (it && it.children) it.open = true
  } else if (msg.is('left', 'h')) {
    var it2 = this.selectedItem()
    if (it2 && it2.children) it2.open = false
  }
  return [this, null]
}
BareTuiTree.prototype.view = function () {
  var flat = this._flat()
  var lines = []
  var i
  for (i = 0; i < flat.length; i++) {
    var it = flat[i].item
    var pad = ''
    var d
    for (d = 0; d < flat[i].depth; d++) pad += '  '
    var mark = it.children ? (it.open ? '▾ ' : '▸ ') : '  '
    var line = pad + mark + (it.title || it.name || '')
    if (i === this.cursor)
      line = bareTuiAnsi.modifierReverse + line + bareTuiAnsi.modifierNotReverse
    lines.push(line)
  }
  return lines.join('\n')
}

function BareTuiStatusbar(opts) {
  opts = opts || {}
  this.width = opts.width || 0
  this.left = opts.left || ''
  this.center = opts.center || ''
  this.right = opts.right || ''
}
BareTuiStatusbar.prototype.set = function (part, text) {
  if (part === 'left') this.left = text
  else if (part === 'center') this.center = text
  else if (part === 'right') this.right = text
  return this
}
BareTuiStatusbar.prototype.update = function () {
  return [this, null]
}
BareTuiStatusbar.prototype.view = function () {
  var w = this.width || 80
  var l = String(this.left)
  var c = String(this.center)
  var r = String(this.right)
  var inner = w - bareTuiLineWidth(l) - bareTuiLineWidth(r)
  if (inner < 1) return bareTuiTruncate(l + ' ' + r, w)
  var leftPad = Math.max(0, Math.floor((inner - bareTuiLineWidth(c)) / 2))
  var rightPad = Math.max(0, inner - bareTuiLineWidth(c) - leftPad)
  return l + bareTuiRepeat(' ', leftPad) + c + bareTuiRepeat(' ', rightPad) + r
}

function BareTuiSplit(opts) {
  opts = opts || {}
  this.direction = opts.direction === 'column' ? 'column' : 'row'
  this.ratio = opts.ratio == null ? 0.5 : opts.ratio
  this.a = opts.left || opts.a || null
  this.b = opts.right || opts.b || null
  this.focusPane = opts.focus || 'a'
  this.width = opts.width || 0
  this.height = opts.height || 0
}
BareTuiSplit.prototype.update = function (msg) {
  if (msg && msg.type === 'key' && msg.is('ctrl+w')) {
    this.focusPane = this.focusPane === 'a' ? 'b' : 'a'
    return [this, null]
  }
  var pane = this.focusPane === 'b' ? this.b : this.a
  if (pane && typeof pane.update === 'function') {
    var pair = pane.update(msg)
    if (this.focusPane === 'b') this.b = pair[0]
    else this.a = pair[0]
    return [this, pair[1]]
  }
  return [this, null]
}
BareTuiSplit.prototype.view = function () {
  var va =
    this.a && typeof this.a.view === 'function'
      ? this.a.view()
      : String(this.a || '')
  var vb =
    this.b && typeof this.b.view === 'function'
      ? this.b.view()
      : String(this.b || '')
  if (this.direction === 'column') {
    return bareTuiJoinVertical(0, va, vb)
  }
  return bareTuiJoinHorizontal(0, va, ' │ ', vb)
}

function BareTuiToast(opts) {
  opts = opts || {}
  this.text = ''
  this.ttl = opts.ttl || 2000
  this.visible = false
  this.id = bareTuiNextWidgetId++
  this.tag = 0
}
BareTuiToast.prototype.show = function (text, ms) {
  this.text = String(text || '')
  this.visible = true
  if (ms) this.ttl = ms
  this.tag++
  return this._tick()
}
BareTuiToast.prototype._tick = function () {
  var id = this.id
  var tag = this.tag
  var ms = this.ttl
  return bareTuiTick(ms, function () {
    return { type: 'toast.hide', id: id, tag: tag }
  })
}
BareTuiToast.prototype.update = function (msg) {
  if (!msg || msg.type !== 'toast.hide') return [this, null]
  if (msg.id !== this.id || msg.tag !== this.tag) return [this, null]
  this.visible = false
  this.text = ''
  return [this, null]
}
BareTuiToast.prototype.view = function () {
  return this.visible ? this.text : ''
}

function bareTuiInlineMd(s) {
  var out = ''
  var i = 0
  while (i < s.length) {
    if (s.slice(i, i + 2) === '**') {
      var end = s.indexOf('**', i + 2)
      if (end > i) {
        out += bareTuiAnsi.sgr(1) + s.slice(i + 2, end) + bareTuiAnsi.reset
        i = end + 2
        continue
      }
    }
    if (s.charAt(i) === '`') {
      var e2 = s.indexOf('`', i + 1)
      if (e2 > i) {
        out += bareTuiAnsi.modifierDim + s.slice(i + 1, e2) + bareTuiAnsi.reset
        i = e2 + 1
        continue
      }
    }
    out += s.charAt(i)
    i++
  }
  return out
}

function bareTuiRenderMarkdown(src) {
  var lines = String(src || '').split('\n')
  var out = []
  var fence = false
  var i
  for (i = 0; i < lines.length; i++) {
    var line = lines[i]
    if (line.slice(0, 3) === '```') {
      fence = !fence
      continue
    }
    if (fence) {
      out.push(bareTuiAnsi.modifierDim + line + bareTuiAnsi.reset)
      continue
    }
    if (/^#{1,3} /.test(line)) {
      var text = line.replace(/^#{1,3} /, '')
      out.push(bareTuiAnsi.sgr(1) + text + bareTuiAnsi.reset)
      continue
    }
    if (/^[-*] /.test(line)) {
      out.push('• ' + bareTuiInlineMd(line.slice(2)))
      continue
    }
    if (
      line.charAt(0) === '>' &&
      (line.charAt(1) === ' ' || line.length === 1)
    ) {
      out.push(bareTuiAnsi.modifierDim + line.slice(2) + bareTuiAnsi.reset)
      continue
    }
    out.push(bareTuiInlineMd(line))
  }
  return out.join('\n')
}

function BareTuiMarkdown(opts) {
  opts = opts || {}
  this.source = opts.source || opts.text || ''
  this.viewport = bareTuiViewport.create({
    width: opts.width || 0,
    height: opts.height || 12
  })
  this.viewport.setContent(bareTuiRenderMarkdown(this.source))
}
BareTuiMarkdown.prototype.setSource = function (src) {
  this.source = src
  this.viewport.setContent(bareTuiRenderMarkdown(src))
  return this
}
BareTuiMarkdown.prototype.update = function (msg) {
  var pair = this.viewport.update(msg)
  this.viewport = pair[0]
  return [this, pair[1]]
}
BareTuiMarkdown.prototype.view = function () {
  return this.viewport.view()
}

var bareTuiTabs = {
  create: function (opts) {
    return new BareTuiTabs(opts)
  }
}
var bareTuiModal = {
  create: function (opts) {
    return new BareTuiModal(opts)
  }
}
var bareTuiDialog = {
  create: function (opts) {
    return new BareTuiDialog(opts)
  }
}
var bareTuiTree = {
  create: function (opts) {
    return new BareTuiTree(opts)
  }
}
var bareTuiStatusbar = {
  create: function (opts) {
    return new BareTuiStatusbar(opts)
  }
}
var bareTuiSplit = {
  create: function (opts) {
    return new BareTuiSplit(opts)
  }
}
var bareTuiToast = {
  create: function (opts) {
    return new BareTuiToast(opts)
  }
}
var bareTuiMarkdown = {
  create: function (opts) {
    return new BareTuiMarkdown(opts)
  },
  render: bareTuiRenderMarkdown
}

/* src/zz-export.js */
/** Public ctx.tui / ctx.sdk surface. */

function bareTuiBuildPublic(ctx) {
  return {
    version: BARE_TUI_VERSION,
    isTTY: function (opts) {
      return bareTuiIsTTY(ctx, opts)
    },
    buffer: {
      create: bareTuiGridCreate,
      fill: bareTuiGridFill,
      blit: bareTuiGridBlit,
      plain: bareTuiGridPlain
    },
    size: function (opts) {
      return bareTuiSize(ctx, opts)
    },
    ansi: bareTuiAnsi,
    key: {
      matches: bareTuiKeyMatches,
      binding: bareTuiKeyBinding
    },
    decode: bareTuiDecodeBytes,
    createDecoder: bareTuiCreateDecoder,
    acquire: function (opts) {
      return bareTuiAcquire(ctx, opts)
    },
    release: function (opts) {
      return bareTuiRelease(ctx, opts)
    },
    withSession: function (fn, opts) {
      return bareTuiWithSession(ctx, fn, opts)
    },
    screen: {
      enter: function (opts) {
        return bareTuiScreenEnter(ctx, opts)
      },
      leave: function (opts) {
        return bareTuiScreenLeave(ctx, opts)
      }
    },
    style: bareTuiMakeStyleFactory(ctx),
    theme: function (opts) {
      return bareTuiResolveTheme(ctx, opts)
    },
    run: function (model, opts) {
      return bareTuiRunProgram(ctx, model, opts)
    },
    create: function (model, opts) {
      return bareTuiCreateProgram(ctx, model, opts)
    },
    send: function (msg) {
      return bareTuiSendActive(ctx, msg)
    },
    quit: bareTuiQuitCmd,
    tick: bareTuiTick,
    every: bareTuiEvery,
    batch: bareTuiBatch,
    sequence: bareTuiSequence,
    suspend: bareTuiSuspend,
    spinner: bareTuiSpinner,
    textinput: bareTuiTextinput,
    autocomplete: bareTuiAutocomplete,
    textarea: bareTuiTextarea,
    viewport: bareTuiViewport,
    list: bareTuiList,
    table: bareTuiTable,
    help: bareTuiHelp,
    progress: bareTuiProgress,
    paginator: bareTuiPaginator,
    stopwatch: bareTuiStopwatch,
    timer: bareTuiTimer,
    checkbox: bareTuiCheckbox,
    radio: bareTuiRadio,
    select: bareTuiSelect,
    focus: bareTuiFocus,
    filepicker: {
      create: function (opts) {
        return bareTuiFilepickerCreate(ctx, opts)
      },
      mock: bareTuiFilepickerMock
    },
    form: {
      create: bareTuiFormCreate,
      run: function (form, opts) {
        return bareTuiFormRun(ctx, form, opts)
      },
      text: bareTuiFormText,
      textarea: bareTuiFormTextarea,
      number: bareTuiFormNumber,
      select: bareTuiFormSelect,
      radio: bareTuiFormRadio,
      confirm: bareTuiFormConfirm
    },
    confirm: (function () {
      var fn = function (opts) {
        return bareTuiConfirm(ctx, opts)
      }
      fn.create = function (opts) {
        return new BareTuiConfirmApp(opts)
      }
      return fn
    })(),
    prompt: (function () {
      var fn = function (opts) {
        return bareTuiPrompt(ctx, opts)
      }
      fn.create = function (opts) {
        return new BareTuiPromptApp(opts)
      }
      return fn
    })(),
    choose: (function () {
      var fn = function (opts) {
        return bareTuiChoose(ctx, opts)
      }
      fn.create = function (opts) {
        return new BareTuiChooseApp(opts)
      }
      return fn
    })(),
    tabs: bareTuiTabs,
    modal: bareTuiModal,
    dialog: bareTuiDialog,
    tree: bareTuiTree,
    statusbar: bareTuiStatusbar,
    split: bareTuiSplit,
    toast: bareTuiToast,
    markdown: bareTuiMarkdown
  }
}

function bareTuiBuildSdk(ctx, tui) {
  return {
    tui: tui,
    theme: {
      name: function (opts) {
        return tui.theme(opts).name
      },
      tokens: function (opts) {
        return tui.theme(opts).tokens
      },
      apply: function (name) {
        if (name && ctx && ctx.env) ctx.env.BARE_OS_THEME = String(name)
        if (ctx && typeof ctx.bareOsApplyTheme === 'function') {
          return Promise.resolve(ctx.bareOsApplyTheme())
        }
        return Promise.resolve()
      }
    },
    env: {
      get: function (key) {
        if (!ctx || !ctx.env) return ''
        var v = ctx.env[key]
        return v == null ? '' : String(v)
      },
      has: function (key) {
        return !!(
          ctx &&
          ctx.env &&
          ctx.env[key] != null &&
          String(ctx.env[key]) !== ''
        )
      },
      term: function () {
        return this.get('TERM') || 'unknown'
      },
      colorDepth: function () {
        return tui.theme().depth
      },
      noColor: function () {
        return tui.theme().noColor
      }
    },
    proc: {
      read: function (name) {
        var path = String(name || '')
        if (path.indexOf('/') < 0) path = '/proc/bare_os/' + path
        if (!ctx || !ctx.vfs || typeof ctx.vfs.readFile !== 'function') {
          return Promise.resolve(null)
        }
        return Promise.resolve(ctx.vfs.readFile(path)).then(function (buf) {
          if (!buf) return null
          if (ctx.b4a && typeof ctx.b4a.toString === 'function')
            return ctx.b4a.toString(buf)
          if (typeof TextDecoder !== 'undefined') {
            return new TextDecoder('utf-8').decode(buf)
          }
          return String(buf)
        })
      }
    },
    ipc: {
      pushJson: function (name, obj) {
        if (
          !ctx ||
          !ctx.bareOsIpc ||
          typeof ctx.bareOsIpc.pushJson !== 'function'
        ) {
          return false
        }
        ctx.bareOsIpc.pushJson(name, obj)
        return true
      },
      takeJson: function (name) {
        if (
          !ctx ||
          !ctx.bareOsIpc ||
          typeof ctx.bareOsIpc.takeJson !== 'function'
        ) {
          return Promise.resolve(null)
        }
        return ctx.bareOsIpc.takeJson(name)
      }
    },
    app: {
      run: function (model, opts) {
        return tui.run(model, opts)
      },
      confirm: function (opts) {
        return tui.confirm(opts)
      },
      prompt: function (opts) {
        return tui.prompt(opts)
      },
      select: function (opts) {
        return tui.choose(opts)
      },
      form: function (spec, opts) {
        var f = tui.form.create(spec)
        return tui.form.run(f, opts)
      }
    },
    vfs: {
      list: function (path) {
        if (!ctx || !ctx.vfs || typeof ctx.vfs.readdir !== 'function') {
          return Promise.resolve([])
        }
        return ctx.vfs.readdir(path)
      },
      readText: function (path) {
        if (!ctx || !ctx.vfs || typeof ctx.vfs.readFile !== 'function') {
          return Promise.resolve(null)
        }
        return Promise.resolve(ctx.vfs.readFile(path)).then(function (buf) {
          if (!buf) return null
          if (ctx.b4a && typeof ctx.b4a.toString === 'function')
            return ctx.b4a.toString(buf)
          if (typeof TextDecoder !== 'undefined') {
            return new TextDecoder('utf-8').decode(buf)
          }
          return String(buf)
        })
      },
      writeText: function (path, text) {
        if (!ctx || !ctx.vfs || typeof ctx.vfs.writeFile !== 'function') {
          return Promise.resolve(false)
        }
        var s = String(text == null ? '' : text)
        var buf
        if (ctx.b4a && typeof ctx.b4a.from === 'function') buf = ctx.b4a.from(s)
        else if (typeof TextEncoder !== 'undefined')
          buf = new TextEncoder().encode(s)
        else buf = s
        return Promise.resolve(ctx.vfs.writeFile(path, buf)).then(function () {
          return true
        })
      }
    },
    tty: {
      isTTY: function (opts) {
        return tui.isTTY(opts)
      },
      size: function (opts) {
        return tui.size(opts)
      },
      acquire: function (opts) {
        return tui.acquire(opts)
      },
      release: function (opts) {
        return tui.release(opts)
      },
      withSession: function (fn, opts) {
        return tui.withSession(fn, opts)
      }
    }
  }
}

function bareTuiAttachToCtx(ctx) {
  var tui = bareTuiBuildPublic(ctx)
  var sdk = bareTuiBuildSdk(ctx, tui)
  return { tui: tui, sdk: sdk }
}
return bareTuiAttachToCtx(ctx);
})