Allow setting different wallpapers for different desktops

Author: icewind1991

modules/workspace.nix

@@ -161,7 +161,7 @@ in
     };
 
     wallpaper = lib.mkOption {
-      type = with lib.types; nullOr path;
+      type = with lib.types; nullOr (either path (listOf path));
       default = null;
       example = lib.literalExpression ''"''${pkgs.kdePackages.plasma-workspace-wallpapers}/share/wallpapers/Kay/contents/images/1080x1920.png"'';
       description = ''
@@ -453,34 +453,44 @@ in
               for (const desktop of allDesktops) {
                   desktop.wallpaperPlugin = "org.kde.image";
                   desktop.currentConfigGroup = ["Wallpaper", "org.kde.image", "General"];
-                  desktop.writeConfig("Image", "file://${toString cfg.workspace.wallpaper}");
                   ${
-                    lib.optionalString (cfg.workspace.wallpaperFillMode != null)
-                      ''desktop.writeConfig("FillMode", "${
-                        toString wallpaperFillModeTypes.${cfg.workspace.wallpaperFillMode}
-                      }");''
+                    if (builtins.typeOf cfg.workspace.wallpaper) == "list" then
+                      ''
+                        let images = [
+                        ${
+                          builtins.concatStringsSep "\n," (map (
+                            wallpaper: ''"file://${toString wallpaper}"''
+                          ) cfg.workspace.wallpaper)
+                        }
+                        ];
+                        let image = images[desktop.screen];''
+                    else
+                      ''let image = "file://${toString cfg.workspace.wallpaper}""''
                   }
-                  ${
-                    lib.optionalString (cfg.workspace.wallpaperBackground != null)
-                      ''desktop.writeConfig("${
-                        if cfg.workspace.wallpaperBackground ? blur && cfg.workspace.wallpaperBackground.blur != null then
-                          "Blur"
-                        else if
-                          cfg.workspace.wallpaperBackground ? color && cfg.workspace.wallpaperBackground.color != null
-                        then
-                          "Color"
-                        else
-                          throw "plasma-manager: wallpaperBackground is not null and has no option set"
-                      }", "${
-                        if cfg.workspace.wallpaperBackground ? blur && cfg.workspace.wallpaperBackground.blur != null then
-                          lib.boolToString cfg.workspace.wallpaperBackground.blur
-                        else if
-                          cfg.workspace.wallpaperBackground ? color && cfg.workspace.wallpaperBackground.color != null
-                        then
-                          cfg.workspace.wallpaperBackground.color
-                        else
-                          throw "plasma-manager: wallpaperBackground is not null and has no option set"
-                      }");''
+                  if (image) {
+                    desktop.writeConfig("Image", image);
+                    ${
+                        lib.optionalString (cfg.workspace.wallpaperBackground != null)
+                        ''desktop.writeConfig("${
+                            if cfg.workspace.wallpaperBackground ? blur && cfg.workspace.wallpaperBackground.blur != null then
+                            "Blur"
+                            else if
+                            cfg.workspace.wallpaperBackground ? color && cfg.workspace.wallpaperBackground.color != null
+                            then
+                            "Color"
+                            else
+                            throw "plasma-manager: wallpaperBackground is not null and has no option set"
+                        }", "${
+                            if cfg.workspace.wallpaperBackground ? blur && cfg.workspace.wallpaperBackground.blur != null then
+                            lib.boolToString cfg.workspace.wallpaperBackground.blur
+                            else if
+                            cfg.workspace.wallpaperBackground ? color && cfg.workspace.wallpaperBackground.color != null
+                            then
+                            cfg.workspace.wallpaperBackground.color
+                            else
+                            throw "plasma-manager: wallpaperBackground is not null and has no option set"
+                        }");''
+                    }
                   }
               }
             '';