From 4d10b717e454498d2c6196905c34a1153ff34b75 Mon Sep 17 00:00:00 2001
From: Kenichi Kamiya <kachick1@gmail.com>
Date: Sun, 12 Jan 2025 17:15:02 +0900
Subject: [PATCH] Open images with Loupe by default

---
 home-manager/desktop.nix | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/home-manager/desktop.nix b/home-manager/desktop.nix
index ff09e10b..fdd7a833 100644
--- a/home-manager/desktop.nix
+++ b/home-manager/desktop.nix
@@ -5,6 +5,12 @@ let
     "google-chrome.desktop"
     "firefox.desktop"
   ];
+
+  # Loupe is faster than browsers to open images
+  imageViewer = [
+    # https://gitlab.gnome.org/GNOME/loupe/-/blob/47.2/data/meson.build#L54
+    "org.gnome.Loupe.desktop"
+  ];
 in
 {
   imports = [ ./gnome.nix ];
@@ -16,14 +22,26 @@ in
       # Don't use `xdg-settings set default-web-browser`.
       # https://github.com/nix-community/home-manager/issues/96#issuecomment-343650659 is old. Using both made errors such as https://github.com/kachick/dotfiles/pull/1038#discussion_r1910360832
       # So use only xdg.mimeApps
-      defaultApplications = lib.genAttrs [
+      defaultApplications = (lib.genAttrs [
         "text/html"
         "x-scheme-handler/http"
         "x-scheme-handler/https"
         "x-scheme-handler/about"
         "x-scheme-handler/unknown"
-        "application/pdf" # I prefer to open PDF with reader, editor is not frequently used.
-      ] (_: defaultBrowser);
+        "application/pdf" # I prefer to open PDF with reader, editor is not frequently used. And native readers Papers is much heavy than browsers
+      ] (_: defaultBrowser)) // (lib.genAttrs [
+        # Supported mime-types: https://gitlab.gnome.org/GNOME/loupe/-/blob/47.2/data/meson.build
+
+        "image/jpeg"
+        "image/png"
+        "image/gif"
+        "image/webp"
+        "image/tiff"
+        "image/bmp"
+        "image/vnd.microsoft.icon"
+        "image/svg+xml"
+        "image/svg+xml-compressed"
+      ] (_: imageViewer) );
     };
   };
 }