Merge pull request #38 from igorkulman/multiple-screens-support

Multiple screens support

Author: igorkulman

README.md

@@ -117,6 +117,10 @@ If you do not provide the wallpaper path
 
 the currently set wallpaper will be used.
 
+#### Multiple displays
+
+If you use multiple displays and want the wallpaper generated for all of them, add the `--all-displays` flag at the end of the command, so for example `./ChangeMenuBarColor Gradient "#FF0000" "#00FF00" --all-displays`.
+
 ## Known issues
 
 Dynamic wallpapers are not supported at the moment. If you use a dynamic wallpaper the utility will not be able to use it and will fail.

Sources/ChangeMenuBarColor/Commands/Abstract/Command.swift

@@ -13,25 +13,33 @@ import SwiftHEXColors
 
 class Command {
     func createWallpaper(screen: NSScreen) -> NSImage? {
-        return nil
+        fatalError("Override for each type")
+    }
+
+    var useAllDisplays: Bool {
+        fatalError("Override for each type")
     }
 
     func run() {
-        Log.info("Starting up")
+        Log.info("Starting up\n")
 
-        guard let screen = NSScreen.main else {
-            Log.error("Could not find the main screen")
-            return
-        }
+        let screens: [NSScreen] = useAllDisplays ? NSScreen.screens : [NSScreen.main].compactMap({ $0 })
 
-        guard let adjustedWallpaper = createWallpaper(screen: screen), let data = adjustedWallpaper.jpgData else {
-            Log.error("Could not generate new wallpaper fr the main screen")
+        guard !screens.isEmpty else {
+            Log.error("Could not detect any screens")
             return
         }
 
-        setWallpaper(screen: screen, wallpaper: data)
+        for (index, screen) in screens.enumerated() {
+            guard let adjustedWallpaper = createWallpaper(screen: screen), let data = adjustedWallpaper.jpgData else {
+                Log.error("Could not generate new wallpaper screen \(index)")
+                continue
+            }
+
+            setWallpaper(screen: screen, wallpaper: data)
+        }
 
-        Log.info("All done!")
+        Log.info("\nAll done!")
     }
 
     func loadWallpaperImage(wallpaper: String?, screen: NSScreen) -> NSImage? {

Sources/ChangeMenuBarColor/Commands/Gradient.swift

@@ -24,6 +24,13 @@ final class Gradient: Command, ParsableCommand {
     @Argument(help: "Wallpaper to use. If not provided the current macOS wallpaper will be used")
     private var wallpaper: String?
 
+    @Flag(help: "Flag to set wallpaper for all displays not just the main display")
+    private var allDisplays: Bool = false
+
+    override var useAllDisplays: Bool {
+        return allDisplays
+    }
+
     override func createWallpaper(screen: NSScreen) -> NSImage? {
         guard let wallpaper = loadWallpaperImage(wallpaper: wallpaper, screen: screen) else {
             return nil

Sources/ChangeMenuBarColor/Commands/SolidColor.swift

@@ -22,6 +22,13 @@ final class SolidColor: Command, ParsableCommand {
     @Argument(help: "Wallpaper to use. If not provided the current macOS wallpaper will be used")
     private var wallpaper: String?
 
+    @Flag(help: "Flag to set wallpaper for all displays not just the main display")
+    private var allDisplays: Bool = false
+
+    override var useAllDisplays: Bool {
+        return allDisplays
+    }
+
     override func createWallpaper(screen: NSScreen) -> NSImage? {
         guard let wallpaper = loadWallpaperImage(wallpaper: wallpaper, screen: screen) else {
             return nil