Add feh

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/user/gui/feh/default.nix

@@ -0,0 +1,55 @@
+{
+  user ? throw "user argument is required",
+  home ? throw "home argument is required",
+}:
+{ lib, pkgs, ... }:
+{
+  home-manager.users.${user} = {
+    programs.feh = {
+      enable = true;
+
+      buttons = {
+        prev_img = null;
+        next_img = null;
+        zoom_in = 4;
+        zoom_out = 5;
+      };
+
+      themes.feh = [
+        "--auto-zoom"
+        "--scale-down"
+        "--borderless"
+        "--draw-filename"
+        "--image-bg"
+        "black"
+        "--conversion-timeout"
+        "5"
+      ];
+    };
+
+    xdg.mimeApps.defaultApplications = lib.attrsets.genAttrs [
+      "image/bmp"
+      "image/gif"
+      "image/jpeg"
+      "image/jpg"
+      "image/pjpeg"
+      "image/png"
+      "image/tiff"
+      "image/x-bmp"
+      "image/x-gray"
+      "image/x-icb"
+      "image/x-ico"
+      "image/x-png"
+      "image/x-portable-anymap"
+      "image/x-portable-bitmap"
+      "image/x-portable-graymap"
+      "image/x-portable-pixmap"
+      "image/x-xbitmap"
+      "image/x-xpixmap"
+      "image/x-pcx"
+      "image/svg+xml"
+      "image/svg+xml-compressed"
+      "image/vnd.wap.wbmp"
+    ] (_: "feh.desktop");
+  };
+}