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// dingger menu bar: live agent states from tmux pane user options
// (@agent / @agent_state), written by the dingger daemon.
//
// Design (per design panel): one question answered — "how many agents are
// waiting on me?" The status item is a bell plus the ready-queue depth;
// shape carries state (filled = needs you, outline = seen/calm, dotted =
// working); color is reserved for the tmux segment's blocked accent.
import AppKit
struct PaneRow {
let paneId: String
let target: String
let agent: String
let state: String
}
func symbol(_ name: String) -> NSImage? {
let image = NSImage(systemSymbolName: name, accessibilityDescription: nil)
return image?.withSymbolConfiguration(.init(pointSize: 13, weight: .regular))
}
func stateSymbol(_ state: String, queued: Bool) -> NSImage? {
switch (state, queued) {
case ("blocked", true): return symbol("exclamationmark.circle.fill")
case ("idle", true): return symbol("circle.fill")
case ("working", _): return symbol("circle.dotted") ?? symbol("hourglass")
case ("blocked", _): return symbol("exclamationmark.circle")
default: return symbol("circle")
}
}
final class Menubar: NSObject, NSApplicationDelegate, NSMenuDelegate {
private let item = NSStatusBar.system.statusItem(withLength: NSStatusItem.variableLength)
private let menu = NSMenu()
private var panes: [PaneRow] = []
private var queue: [String] = [] // pane ids, oldest waiting first
func applicationDidFinishLaunching(_: Notification) {
NSApp.setActivationPolicy(.accessory) // no Dock icon
item.button?.image = symbol("bell")
item.button?.font = NSFont.monospacedDigitSystemFont(ofSize: 13, weight: .regular)
item.menu = menu
menu.delegate = self
let timer = Timer(timeInterval: 2.0, repeats: true) { [weak self] _ in
self?.refreshTitle()
}
RunLoop.main.add(timer, forMode: .common)
refreshTitle()
}
// MARK: data
private func runTmux(_ args: [String]) -> String? {
let process = Process()
process.executableURL = URL(fileURLWithPath: "/opt/homebrew/bin/tmux")
process.arguments = args
let pipe = Pipe()
process.standardOutput = pipe
process.standardError = FileHandle.nullDevice
do {
try process.run()
} catch {
return nil
}
let data = pipe.fileHandleForReading.readDataToEndOfFile()
process.waitUntilExit()
guard process.terminationStatus == 0 else { return nil }
return String(data: data, encoding: .utf8)
}
private func fetchPanes() -> [PaneRow] {
let fmt = "#{pane_id}\t#{session_name}:#{window_index}.#{pane_index}\t#{@agent}\t#{@agent_state}\t#{@dingger_ack}\t#{window_panes}"
guard let out = runTmux(["-u", "list-panes", "-a", "-F", fmt]) else { return [] }
return out.split(separator: "\n").compactMap { line in
let fields = line.split(separator: "\t", omittingEmptySubsequences: false)
guard fields.count >= 6 else { return nil }
let agent = String(fields[2])
let state = fields[3].isEmpty ? "unknown" : String(fields[3])
// Only tracked panes with a live state belong in the menu.
guard !agent.isEmpty, ["idle", "working", "blocked"].contains(state) else {
return nil
}
var target = "\(fields[1].split(separator: ".", maxSplits: 1).first ?? fields[1])"
if Int(fields[5]) ?? 1 > 1 {
target = String(fields[1])
}
return PaneRow(paneId: String(fields[0]), target: target, agent: agent, state: state)
}
}
private func fetchQueue() -> [String] {
guard let out = runTmux(["-u", "show-option", "-gv", "@dingger_queue"]) else { return [] }
return out.trimmingCharacters(in: .whitespacesAndNewlines)
.split(separator: ",").map { $0.split(separator: ":").first.map(String.init) ?? "" }
}
// MARK: title (timer-driven; never touches the open menu)
private func refreshTitle() {
panes = fetchPanes()
queue = fetchQueue()
let queued = panes.filter { row in queue.contains(row.paneId) }
let blocked = queued.filter { $0.state == "blocked" }.count
let working = panes.filter { $0.state == "working" }.count
let (name, count): (String, String)
if blocked > 0 {
(name, count) = ("bell.fill", String(queued.count))
} else if !queued.isEmpty {
(name, count) = ("bell", String(queued.count))
} else if working > 0 {
(name, count) = ("bell", "")
} else {
(name, count) = ("bell", "")
}
item.button?.image = symbol(name)
item.button?.title = count
var tip: [String] = []
if blocked > 0 { tip.append("\(blocked) blocked") }
if queued.count - blocked > 0 { tip.append("\(queued.count - blocked) waiting") }
if working > 0 { tip.append("\(working) working") }
let tipText = tip.isEmpty ? "Nothing waiting" : tip.joined(separator: " · ")
item.button?.toolTip = tipText
item.button?.setAccessibilityLabel("dingger, " + tipText)
}
// MARK: menu (rebuilt when opened, so rows don't reshuffle under the cursor)
func menuNeedsUpdate(_ menu: NSMenu) {
rebuildMenu()
}
private func rebuildMenu() {
menu.removeAllItems()
// Queue order (oldest waiting first), then the rest by target.
var ordered: [PaneRow] = []
for paneId in queue {
if let row = panes.first(where: { $0.paneId == paneId && $0.state != "working" }) {
ordered.append(row)
}
}
let orderedIds = ordered.map { $0.paneId }
let rest = panes
.filter { !orderedIds.contains($0.paneId) }
.sorted { $0.target < $1.target }
ordered.append(contentsOf: rest)
if panes.isEmpty {
let none = NSMenuItem(title: "No agents", action: nil, keyEquivalent: "")
none.isEnabled = false
menu.addItem(none)
}
var previousWaiting: Bool?
for pane in ordered {
let queued = queue.contains(pane.paneId)
let waiting = pane.state == "idle" || pane.state == "blocked"
// One separator between waiting agents and busy ones.
if let previous = previousWaiting, previous && !waiting {
menu.addItem(.separator())
}
previousWaiting = waiting
let row = NSMenuItem(title: "\(pane.agent)\t\(pane.target)",
action: #selector(paneClicked(_:)), keyEquivalent: "")
row.target = self
row.image = stateSymbol(pane.state, queued: queued)
row.attributedTitle = attributedRow(agent: pane.agent, target: pane.target)
row.toolTip = "\(pane.state) — \(pane.target)"
row.representedObject = pane.paneId
menu.addItem(row)
}
menu.addItem(.separator())
let quit = NSMenuItem(title: "Quit dingger", action: #selector(NSApplication.terminate(_:)), keyEquivalent: "q")
menu.addItem(quit)
}
/// Agent left, tmux target right-aligned at a computed tab stop — like a
/// native menu's key-equivalent column.
private func attributedRow(agent: String, target: String) -> NSAttributedString {
let menuFont = NSFont.menuFont(ofSize: 0)
let monoFont = NSFont.monospacedSystemFont(
ofSize: menuFont.pointSize - 1, weight: .regular)
let agentWidth = (agent as NSString).size(withAttributes: [.font: menuFont]).width
let targetWidth = (target as NSString).size(withAttributes: [.font: monoFont]).width
let tabStop = ceil(agentWidth + 40 + targetWidth)
let paragraph = NSMutableParagraphStyle()
paragraph.tabStops = [NSTextTab(textAlignment: .right, location: tabStop)]
let text = NSMutableAttributedString()
text.append(NSAttributedString(
string: agent,
attributes: [.font: menuFont, .paragraphStyle: paragraph]))
text.append(NSAttributedString(string: "\t"))
text.append(NSAttributedString(
string: target,
attributes: [.font: monoFont, .paragraphStyle: paragraph]))
return text
}
// MARK: actions
@objc private func paneClicked(_ sender: NSMenuItem) {
guard let paneId = sender.representedObject as? String else { return }
// Ack like `dingger focus` does, so both counts drop together.
_ = runTmux(["-u", "set-option", "-p", "-t", paneId, "@dingger_ack", "1"])
let target = panes.first { $0.paneId == paneId }?.target ?? ""
guard !target.isEmpty else { return }
_ = runTmux(["-u", "switch-client", "-t", target])
for bundle in ["com.mitchellh.ghostty", "org.alacritty", "com.apple.Terminal"] {
if let app = NSRunningApplication.runningApplications(withBundleIdentifier: bundle).first {
app.activate()
break
}
}
}
}
let app = NSApplication.shared
let delegate = Menubar()
app.delegate = delegate
app.setActivationPolicy(.accessory)
app.run()
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