move window definition to theme and make it dynamic

Sources/phbar/Models/Config/PHConfig.swift

@@ -1,3 +1,4 @@
 struct PHConfig: Decodable {
+	let window: String
 	let env: [String: String]?
 }

Sources/phbar/Models/Config/config.toml

@@ -1,3 +1,2 @@
+window = "top"
 height = 30
-
-[window]

Sources/phbar/Models/Theme/PHTheme.swift

@@ -1,10 +1,10 @@
 struct PHTheme: Decodable {
-	let window: PHThemeWindow
+	let windows: [PHThemeWindow]?
 	let texts: [PHThemeText]?
 	let styles: [PHThemeStyle]?
 
 	private enum CodingKeys: String, CodingKey {
-		case window
+		case windows = "window"
 		case texts = "text"
 		case styles = "style"
 	}

Sources/phbar/Models/Theme/PHThemeWindow.swift

@@ -1,9 +1,19 @@
 struct PHThemeWindow: Decodable {
-	let hasShadow: Bool
-	let blur: Double
+	let name: String
+	var hasShadow: Bool? = false
+	var blur: Double? = 0
 
 	private enum CodingKeys: String, CodingKey {
+		case name
 		case hasShadow = "shadow"
 		case blur
 	}
+
+	static let `default`: Self = {
+		PHThemeWindow(
+			name: "_default",
+			hasShadow: false,
+			blur: 0.0
+		)
+	}()
 }

Sources/phbar/Models/Theme/theme.toml

@@ -2,7 +2,13 @@
 #
 # Place at ~/.config/phbar/themes/voltage.toml
 
-[window]
+[[window]]
+name = "default"
+shadow = false
+blur   = 0.0
+
+[[window]]
+name = "bottom"
 shadow = false
 blur   = 0.0
 

Sources/phbar/Views/BackgroundView.swift

@@ -1,17 +1,17 @@
 import AppKit
 
 final class BackgroundView: NSView {
-	var hasShadow: Bool {
+	var hasShadow: Bool? = false {
 		didSet { configureShadow() }
 	}
 
-	var blur: CGFloat {
+	var blur: CGFloat? = 0 {
 		didSet { configureBlur() }
 	}
 
 	init(controller: BarController) {
-		self.hasShadow = controller.theme.window.hasShadow
-		self.blur = controller.theme.window.blur
+		if let hasShadow = controller.window.hasShadow { self.hasShadow = hasShadow }
+		if let blur = controller.window.blur { self.blur = blur }
 		super.init(frame: .zero)
 		setup()
 	}
@@ -36,12 +36,12 @@ final class BackgroundView: NSView {
 	}
 
 	private func configureShadow() {
-		guard let window else { return }
+		guard let window, let hasShadow else { return }
 		window.hasShadow = hasShadow
 	}
 
 	private func configureBlur() {
-		guard let window else { return }
+		guard let window, let blur else { return }
 		// Window must be non-opaque for the desktop/other windows behind it
 		// to be visible at all, let alone blurred.
 		window.isOpaque = false

Sources/phbar/Views/BarController.swift

@@ -5,6 +5,7 @@ final class BarController: ObservableObject {
 	let config: PHConfig
 	let screen: NSScreen
 	let theme: PHTheme
+	let window: PHThemeWindow
 	@Published var blocks: [PHBlock]
 
 	var arrangedBlocks: [PHBlock] {
@@ -19,6 +20,7 @@ final class BarController: ObservableObject {
 		self.config = config
 		self.screen = screen
 		self.theme = theme
+		self.window = Self.window(for: config, from: theme)
 		self.blocks = blocks
 
 		for block in blocks {
@@ -32,6 +34,16 @@ final class BarController: ObservableObject {
 // Theming
 
 extension BarController {
+	static func window(for config: PHConfig, from theme: PHTheme) -> PHThemeWindow {
+		guard let window = theme.windows?.first(where: { $0.name == config.window }) else {
+			guard let defaultWindow = theme.windows?.first(where: { $0.name == "default" }) else {
+				return PHThemeWindow.default
+			}
+			return defaultWindow
+		}
+		return window
+	}
+
 	func text(for block: PHBlock) -> PHThemeText {
 		guard let text = theme.texts?.first(where: { $0.name == block.textName }) else {
 			guard let defaultText = theme.texts?.first(where: { $0.name == "default" }) else {