Improve resizing with draggable and hotkeys

Downterm/CommandNotch/Models/NotchSettings.swift

@@ -1,4 +1,5 @@
 import Foundation
+import AppKit
 
 /// Central registry of all user-configurable notch settings.
 enum NotchSettings {
@@ -45,6 +46,7 @@ enum NotchSettings {
         static let terminalFontSize      = "terminalFontSize"
         static let terminalShell         = "terminalShell"
         static let terminalTheme         = "terminalTheme"
+        static let terminalSizePresets   = "terminalSizePresets"
 
         // Hotkeys — each stores a HotkeyBinding JSON string
         static let hotkeyToggle          = "hotkey_toggle"
@@ -90,6 +92,7 @@ enum NotchSettings {
         static let terminalFontSize: Double     = 13
         static let terminalShell: String        = ""
         static let terminalTheme: String        = TerminalTheme.terminalApp.rawValue
+        static let terminalSizePresets: String  = TerminalSizePresetStore.defaultPresetsJSON()
 
         // Default hotkey bindings as JSON
         static let hotkeyToggle: String      = HotkeyBinding.cmdReturn.toJSON()
@@ -136,6 +139,7 @@ enum NotchSettings {
             Keys.terminalFontSize:      Defaults.terminalFontSize,
             Keys.terminalShell:         Defaults.terminalShell,
             Keys.terminalTheme:         Defaults.terminalTheme,
+            Keys.terminalSizePresets:   Defaults.terminalSizePresets,
 
             Keys.hotkeyToggle:          Defaults.hotkeyToggle,
             Keys.hotkeyNewTab:          Defaults.hotkeyNewTab,
@@ -174,3 +178,82 @@ enum NonNotchHeightMode: Int, CaseIterable, Identifiable {
         }
     }
 }
+
+struct TerminalSizePreset: Codable, Equatable, Identifiable {
+    var id: UUID
+    var name: String
+    var width: Double
+    var height: Double
+    var hotkey: HotkeyBinding?
+
+    init(
+        id: UUID = UUID(),
+        name: String,
+        width: Double,
+        height: Double,
+        hotkey: HotkeyBinding? = nil
+    ) {
+        self.id = id
+        self.name = name
+        self.width = width
+        self.height = height
+        self.hotkey = hotkey
+    }
+
+    var size: CGSize {
+        CGSize(width: width, height: height)
+    }
+}
+
+enum TerminalSizePresetStore {
+    static func load() -> [TerminalSizePreset] {
+        let defaults = UserDefaults.standard
+        guard let json = defaults.string(forKey: NotchSettings.Keys.terminalSizePresets),
+              let data = json.data(using: .utf8),
+              let presets = try? JSONDecoder().decode([TerminalSizePreset].self, from: data) else {
+            return defaultPresets()
+        }
+        return presets
+    }
+
+    static func save(_ presets: [TerminalSizePreset]) {
+        guard let data = try? JSONEncoder().encode(presets),
+              let json = String(data: data, encoding: .utf8) else { return }
+        UserDefaults.standard.set(json, forKey: NotchSettings.Keys.terminalSizePresets)
+    }
+
+    static func reset() {
+        save(defaultPresets())
+    }
+
+    static func loadDefaults() -> [TerminalSizePreset] {
+        defaultPresets()
+    }
+
+    static func defaultPresetsJSON() -> String {
+        guard let data = try? JSONEncoder().encode(defaultPresets()),
+              let json = String(data: data, encoding: .utf8) else {
+            return "[]"
+        }
+        return json
+    }
+
+    static func suggestedHotkey(for presets: [TerminalSizePreset]) -> HotkeyBinding? {
+        let used = Set(presets.compactMap(\.hotkey))
+        for digit in 1...9 {
+            guard let candidate = HotkeyBinding.cmdShiftDigit(digit) else { continue }
+            if !used.contains(candidate) {
+                return candidate
+            }
+        }
+        return nil
+    }
+
+    private static func defaultPresets() -> [TerminalSizePreset] {
+        [
+            TerminalSizePreset(name: "Compact", width: 480, height: 220, hotkey: HotkeyBinding.cmdShiftDigit(1)),
+            TerminalSizePreset(name: "Default", width: 640, height: 350, hotkey: HotkeyBinding.cmdShiftDigit(2)),
+            TerminalSizePreset(name: "Large", width: 900, height: 500, hotkey: HotkeyBinding.cmdShiftDigit(3)),
+        ]
+    }
+}