From e31be180c20a55fc0d22a3f6479f71952c4ad226 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9ana=20=E6=B1=9F?= <leana.jiang+git@icloud.com>
Date: Sat, 21 Jun 2025 00:48:13 +0200
Subject: [PATCH] vanadium: firefox search engine for each language and display
 language

take 2
---
 nix/configurations/vanadium/home/firefox.nix | 46 ++++++++++++--------
 1 file changed, 28 insertions(+), 18 deletions(-)

diff --git a/nix/configurations/vanadium/home/firefox.nix b/nix/configurations/vanadium/home/firefox.nix
index 69923a91..8e7ef553 100644
--- a/nix/configurations/vanadium/home/firefox.nix
+++ b/nix/configurations/vanadium/home/firefox.nix
@@ -5,10 +5,6 @@
   ...
 }: let
   inherit (pkgs) nur;
-
-  # reference: https://developers.google.com/custom-search/docs/xml_results?hl=zh-tw#advanced-search-query-parameters
-  mkLrFlag = languageRestrictions:
-    "&lr=" + lib.escapeURL (builtins.concatStringsSep "|" languageRestrictions);
 in {
   programs.firefox = {
     enable = true;
@@ -17,23 +13,37 @@ in {
       RequestedLocales = ["fr" "en-US" "zh-TW"];
 
       SearchEngines = {
-        Default = "Google EN";
+        Default = "Google en@en";
         Remove = ["Google"];
         Add = let
-          langs = ["lang_fr" "lang_en" "lang_zh-TW"];
+          lrValues = ["lang_fr" "lang_en" "lang_zh-TW"];
+          hlValues = ["fr" "en" "zh-TW"];
         in
-          # Google specialized for each language
-          map (lang: let
-            shortcode = lib.substring 0 2 (lib.removePrefix "lang_" lang);
-          in {
-            Name = "Google " + lib.toUpper shortcode;
-            Alias = "G" + shortcode;
-            IconURL = "https://google.com/favicon.ico";
-            Description = "Your data yum yum (but ${shortcode})";
-            SuggestURLTemplate = "https://suggestqueries.google.com/complete/search?q={searchTerms}" + mkLrFlag [lang];
-            URLTemplate = "https://google.com/search?q={searchTerms}" + mkLrFlag [lang];
-          })
-          langs
+          # Google specialized for each language x display language
+          # reference: https://developers.google.com/custom-search/docs/xml_results?hl=zh-tw#advanced-search-query-parameters
+          lib.mapCartesianProduct (
+            {
+              lr,
+              hl,
+            }: let
+              lr' = lib.substring 0 2 (lib.removePrefix "lang_" lr);
+              hl' = lib.substring 0 2 hl;
+            in {
+              Name = "Google ${lr'}@${hl'}";
+              Alias =
+                if (lib.removePrefix "lang_" lr == hl)
+                then "G" + lr'
+                else "G" + lr' + hl';
+              Description = "Your data yum yum (but ${lr'} in ${hl'})";
+              IconURL = "https://google.com/favicon.ico";
+              SuggestURLTemplate = "https://suggestqueries.google.com/complete/search?q={searchTerms}&lr=${lr}&hl=${hl}";
+              URLTemplate = "https://google.com/search?q={searchTerms}&lr=${lr}&hl=${hl}";
+            }
+          )
+          {
+            lr = lrValues;
+            hl = hlValues;
+          }
           ++ [
             {
               Name = "YouTube";