feat: add tmux-based multi-terminal grid view

Launch Claude Code sessions inside embedded tmux panes instead of
separate Terminal.app windows. Sessions are tiled in a grid layout with
color-coded borders per project. Border flashing alerts when a session
goes idle and needs input. Ctrl+` switches between picker and grid view.

New modules:
- src/tmux/session-manager.ts — tmux session lifecycle
- src/tmux/ansi-parser.ts — ANSI escape code to cell grid parser
- src/tmux/capture.ts — polls tmux capture-pane for rendering
- src/tmux/input-bridge.ts — forwards keystrokes to tmux sessions
- src/components/terminal-view.ts — FrameBuffer renderable for panes
- src/components/session-grid.ts — tiled grid with flash effects

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Alejandro Gutiérrez
2026-02-25 00:37:35 +00:00
parent 9c50399e57
commit 4132744a01
7 changed files with 1041 additions and 5 deletions

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import {
BoxRenderable,
TextRenderable,
type CliRenderer,
RGBA,
t,
bold,
dim,
fg,
} from "@opentui/core"
import { TerminalView, getProjectColor } from "./terminal-view"
import type { TmuxSession } from "../tmux/session-manager"
import { sendKeys } from "../tmux/input-bridge"
export interface GridPane {
session: TmuxSession
termView: TerminalView
borderBox: BoxRenderable
titleText: TextRenderable
}
export class SessionGrid {
private renderer: CliRenderer
private container: BoxRenderable
private panes: GridPane[] = []
private _focusIndex = 0
private flashTimers = new Map<string, ReturnType<typeof setInterval>>()
constructor(renderer: CliRenderer, container: BoxRenderable) {
this.renderer = renderer
this.container = container
}
get focusIndex() { return this._focusIndex }
get paneCount() { return this.panes.length }
get focusedPane(): GridPane | null { return this.panes[this._focusIndex] ?? null }
addSession(session: TmuxSession): GridPane {
const color = getProjectColor(session.colorIndex)
const colorRGBA = RGBA.fromHex(color)
const borderBox = new BoxRenderable(this.renderer, {
borderStyle: "rounded",
border: true,
borderColor: colorRGBA,
flexGrow: 1,
flexDirection: "column",
overflow: "hidden",
})
const titleText = new TextRenderable(this.renderer, {
width: "100%",
height: 1,
flexShrink: 0,
})
titleText.content = t` ${bold(fg(color)(session.projectName))}${session.sessionId ? dim(` #${session.sessionId.slice(0, 8)}`) : ""}`
// Calculate pane size (leave room for border + title)
const dims = this.calcPaneDims()
const termView = new TerminalView(this.renderer, {
width: Math.max(dims.w - 2, 10),
height: Math.max(dims.h - 3, 4),
})
borderBox.add(titleText)
borderBox.add(termView)
this.container.add(borderBox)
const pane: GridPane = { session, termView, borderBox, titleText }
this.panes.push(pane)
termView.attach(session)
this.updateLayout()
this.updateBorders()
return pane
}
removeSession(sessionName: string) {
const idx = this.panes.findIndex(p => p.session.name === sessionName)
if (idx < 0) return
const pane = this.panes[idx]
pane.termView.detach()
this.container.remove(pane.borderBox.id)
this.panes.splice(idx, 1)
this.clearFlash(sessionName)
if (this._focusIndex >= this.panes.length) {
this._focusIndex = Math.max(0, this.panes.length - 1)
}
this.updateLayout()
this.updateBorders()
}
focusNext() {
if (this.panes.length === 0) return
this._focusIndex = (this._focusIndex + 1) % this.panes.length
this.updateBorders()
}
focusPrev() {
if (this.panes.length === 0) return
this._focusIndex = (this._focusIndex - 1 + this.panes.length) % this.panes.length
this.updateBorders()
}
focusByIndex(index: number) {
if (index >= 0 && index < this.panes.length) {
this._focusIndex = index
this.updateBorders()
}
}
async sendInputToFocused(rawSequence: string) {
const pane = this.focusedPane
if (!pane) return
await sendKeys(pane.session.name, rawSequence)
}
// Flash a pane's border to draw attention (e.g., when session goes idle)
startFlash(sessionName: string) {
if (this.flashTimers.has(sessionName)) return
const pane = this.panes.find(p => p.session.name === sessionName)
if (!pane) return
const color = getProjectColor(pane.session.colorIndex)
const colorRGBA = RGBA.fromHex(color)
const flashColor = RGBA.fromHex("#ff9e64") // orange flash
let on = true
const timer = setInterval(() => {
pane.borderBox.borderColor = on ? flashColor : colorRGBA
on = !on
this.renderer.requestRender()
}, 400)
this.flashTimers.set(sessionName, timer)
}
clearFlash(sessionName: string) {
const timer = this.flashTimers.get(sessionName)
if (timer) {
clearInterval(timer)
this.flashTimers.delete(sessionName)
}
const pane = this.panes.find(p => p.session.name === sessionName)
if (pane) {
const color = getProjectColor(pane.session.colorIndex)
pane.borderBox.borderColor = RGBA.fromHex(color)
}
}
// Mark a session as needing user input
markIdle(sessionName: string) {
const pane = this.panes.find(p => p.session.name === sessionName)
if (!pane) return
this.startFlash(sessionName)
pane.titleText.content = t` ${bold(fg(getProjectColor(pane.session.colorIndex))(pane.session.projectName))} ${fg("#e0af68")("NEEDS INPUT")}`
this.renderer.requestRender()
}
markBusy(sessionName: string) {
const pane = this.panes.find(p => p.session.name === sessionName)
if (!pane) return
this.clearFlash(sessionName)
pane.titleText.content = t` ${bold(fg(getProjectColor(pane.session.colorIndex))(pane.session.projectName))} ${fg("#9ece6a")("RUNNING")}`
this.renderer.requestRender()
}
clearMark(sessionName: string) {
const pane = this.panes.find(p => p.session.name === sessionName)
if (!pane) return
this.clearFlash(sessionName)
const color = getProjectColor(pane.session.colorIndex)
pane.titleText.content = t` ${bold(fg(color)(pane.session.projectName))}${pane.session.sessionId ? dim(` #${pane.session.sessionId.slice(0, 8)}`) : ""}`
this.renderer.requestRender()
}
private updateBorders() {
for (let i = 0; i < this.panes.length; i++) {
const pane = this.panes[i]
const isFocused = i === this._focusIndex
const color = getProjectColor(pane.session.colorIndex)
// Focused pane gets brighter border, others get dimmer
if (isFocused) {
pane.borderBox.borderColor = RGBA.fromHex("#ffffff")
pane.borderBox.borderStyle = "heavy"
} else {
// Check if flashing — don't override flash timer
if (!this.flashTimers.has(pane.session.name)) {
pane.borderBox.borderColor = RGBA.fromHex(color)
}
pane.borderBox.borderStyle = "rounded"
}
}
this.renderer.requestRender()
}
private updateLayout() {
const n = this.panes.length
if (n === 0) return
// Calculate grid: prefer wider layout
// 1 pane: full, 2: side by side, 3-4: 2x2, 5-6: 3x2, etc.
const cols = n <= 1 ? 1 : n <= 2 ? 2 : n <= 4 ? 2 : n <= 6 ? 3 : n <= 9 ? 3 : 4
const rows = Math.ceil(n / cols)
// Set container direction
this.container.flexDirection = "column"
this.container.flexWrap = "wrap"
// For a proper grid, we'd need nested boxes. For now, use flex percentages.
for (let i = 0; i < n; i++) {
const pane = this.panes[i]
pane.borderBox.width = `${Math.floor(100 / cols)}%`
pane.borderBox.height = `${Math.floor(100 / rows)}%`
}
// Update container to row+wrap for grid
this.container.flexDirection = "row"
this.container.flexWrap = "wrap"
}
private calcPaneDims() {
// Rough estimate based on terminal size
const termW = process.stdout.columns || 120
const termH = process.stdout.rows || 40
const n = Math.max(1, this.panes.length + 1) // +1 for the incoming pane
const cols = n <= 1 ? 1 : n <= 2 ? 2 : n <= 4 ? 2 : 3
const rows = Math.ceil(n / cols)
return {
w: Math.floor(termW / cols),
h: Math.floor((termH - 4) / rows), // -4 for header+footer
}
}
destroyAll() {
for (const timer of this.flashTimers.values()) clearInterval(timer)
this.flashTimers.clear()
for (const pane of this.panes) {
pane.termView.detach()
this.container.remove(pane.borderBox.id)
}
this.panes = []
this._focusIndex = 0
}
}

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import {
FrameBufferRenderable,
type FrameBufferOptions,
type RenderContext,
type OptimizedBuffer,
RGBA,
TextAttributes,
} from "@opentui/core"
import { capturePane, hasChanged, resetHash } from "../tmux/capture"
import { parseAnsiFrame, type ParsedFrame } from "../tmux/ansi-parser"
import type { TmuxSession } from "../tmux/session-manager"
// Per-project color palette for borders (distinct, visible on dark bg)
const PROJECT_COLORS = [
"#7aa2f7", // blue
"#9ece6a", // green
"#e0af68", // yellow
"#f7768e", // red
"#bb9af7", // purple
"#7dcfff", // cyan
"#ff9e64", // orange
"#c0caf5", // white
"#73daca", // teal
"#b4f9f8", // mint
]
export function getProjectColor(colorIndex: number): string {
return PROJECT_COLORS[colorIndex % PROJECT_COLORS.length]
}
export class TerminalView extends FrameBufferRenderable {
session: TmuxSession | null = null
private pollTimer: ReturnType<typeof setInterval> | null = null
private lastFrame: ParsedFrame | null = null
private _focused = false
private _flashUntil = 0 // timestamp until which border flashes
private _idleSince = 0
constructor(ctx: RenderContext, options: FrameBufferOptions) {
super(ctx, options)
}
get focused() { return this._focused }
set focused(v: boolean) { this._focused = v }
get idleSince() { return this._idleSince }
attach(session: TmuxSession) {
this.detach()
this.session = session
resetHash()
this.startPolling()
}
detach() {
this.stopPolling()
this.session = null
this.lastFrame = null
}
flash(durationMs = 2000) {
this._flashUntil = Date.now() + durationMs
}
setIdle(sinceMs: number) {
this._idleSince = sinceMs
}
clearIdle() {
this._idleSince = 0
}
private startPolling() {
if (this.pollTimer) return
this.pollTimer = setInterval(() => this.refresh(), 80)
}
private stopPolling() {
if (this.pollTimer) {
clearInterval(this.pollTimer)
this.pollTimer = null
}
}
private async refresh() {
if (!this.session) return
const result = await capturePane(this.session.name)
if (!result) return
if (!hasChanged(result.lines)) return
const frame = parseAnsiFrame(result.lines, result.width, result.height)
this.lastFrame = frame
this.renderFrameToBuffer(frame)
}
private renderFrameToBuffer(frame: ParsedFrame) {
const fb = this.frameBuffer
if (!fb) return
const w = Math.min(frame.width, fb.width)
const h = Math.min(frame.height, fb.height)
for (let y = 0; y < h; y++) {
const row = frame.cells[y]
if (!row) continue
for (let x = 0; x < w; x++) {
const cell = row[x]
if (!cell) continue
fb.setCell(x, y, cell.char, cell.fg, cell.bg, cell.attrs)
}
}
}
protected renderSelf(buffer: OptimizedBuffer) {
if (this.lastFrame) {
this.renderFrameToBuffer(this.lastFrame)
}
super.renderSelf(buffer)
}
protected onResize(width: number, height: number) {
super.onResize(width, height)
if (this.session) {
// Resize tmux pane to match (async, fire-and-forget)
import("../tmux/session-manager").then(m => {
if (this.session) m.resizePane(this.session.name, width, height)
})
}
}
protected destroySelf() {
this.detach()
super.destroySelf()
}
}