From cec64613630b68a8b0e286df862a92ce555a6bdc Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Fri, 1 Feb 2019 18:46:54 +0100
Subject: Add custom config key for enabling hidpi mode

If this approach works as well as I hope it might become advantageous to nixify e.g. XMonad configuration.
---
 custom.nix       |  8 ++++++++
 gui/default.nix  | 17 +++++++++++++++--
 gui/gtk.nix      |  5 +++--
 gui/hidpi.nix    | 25 -------------------------
 gui/lowdpi.nix   | 11 -----------
 gui/rofi.nix     | 10 ++++++++--
 gui/twmn.nix     |  9 +++++++--
 gui/xmonad.nix   |  8 ++++++--
 home.nix         |  1 +
 host/asterix.nix |  3 ++-
 host/athena.nix  |  3 ++-
 host/obelix.nix  |  3 ++-
 12 files changed, 54 insertions(+), 49 deletions(-)
 create mode 100644 custom.nix
 delete mode 100644 gui/hidpi.nix
 delete mode 100644 gui/lowdpi.nix

diff --git a/custom.nix b/custom.nix
new file mode 100644
index 0000000..266a37e
--- /dev/null
+++ b/custom.nix
@@ -0,0 +1,8 @@
+{ pkgs, ... }:
+
+{
+  options.custom.hidpi = pkgs.lib.mkOption {
+    type = pkgs.lib.types.bool;
+    description = "Configure UI for high DPI displays";
+  };
+}
diff --git a/gui/default.nix b/gui/default.nix
index 9ada0be..2cc011e 100644
--- a/gui/default.nix
+++ b/gui/default.nix
@@ -1,6 +1,9 @@
-{ pkgs, ... }:
+{ config, pkgs, ... }:
 
-{
+let
+  hidpi = config.custom.hidpi;
+
+in {
   imports = [
     ./xmonad.nix
     ./kitty.nix
@@ -11,4 +14,14 @@
     ./apps/web.nix
     ./apps/dev.nix
   ];
+
+  xresources.extraConfig = pkgs.lib.mkIf hidpi ''
+    Xft.dpi: 160
+    Xft.autohint: 0
+    Xft.lcdfilter: lcddefault
+    Xft.hintstyle: hintfull
+    Xft.hinting: 1
+    Xft.antialias: 1
+    Xft.rgba: rgb
+  '';
 }
diff --git a/gui/gtk.nix b/gui/gtk.nix
index 3aec4ea..abfc889 100644
--- a/gui/gtk.nix
+++ b/gui/gtk.nix
@@ -1,6 +1,7 @@
-{ pkgs, ... }:
+{ config, pkgs, ... }:
 
 let
+  hidpi = config.custom.hidpi;
   mypkgs = import (fetchTarball "https://pkgs.kummerlaender.eu/nixexprs.tar.gz") { };
 in {
   gtk = {
@@ -27,7 +28,7 @@ in {
         txt_fg     = "101010";
         gradient   = 0.0;
         roundness  = 0;
-        spacing    = 5;
+        spacing    = if hidpi then 5 else 1;
         wm_border_focus   = "909636";
         wm_border_unfocus = "909636";
         gtk3_generate_dark = false;
diff --git a/gui/hidpi.nix b/gui/hidpi.nix
deleted file mode 100644
index d687ca7..0000000
--- a/gui/hidpi.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-{ pkgs, ... }:
-
-{
-  xresources.extraConfig = ''
-    Xft.dpi: 160
-    Xft.autohint: 0
-    Xft.lcdfilter: lcddefault
-    Xft.hintstyle: hintfull
-    Xft.hinting: 1
-    Xft.antialias: 1
-    Xft.rgba: rgb
-  '';
-
-  xsession.pointerCursor.size = 48;
-
-  home.file.".config/twmn/twmn.conf".text = ''
-    [gui]
-    font_size=24
-    height=32
-  '';
-
-  programs.rofi.extraConfig = ''
-    rofi.dpi: 160
-  '';
-}
diff --git a/gui/lowdpi.nix b/gui/lowdpi.nix
deleted file mode 100644
index 6410f23..0000000
--- a/gui/lowdpi.nix
+++ /dev/null
@@ -1,11 +0,0 @@
-{ pkgs, ... }:
-
-{
-  xsession.pointerCursor.size = 16;
-
-  home.file.".config/twmn/twmn.conf".text = ''
-    [gui]
-    font_size=15
-    height=20
-  '';
-}
diff --git a/gui/rofi.nix b/gui/rofi.nix
index 19749f5..034abdc 100644
--- a/gui/rofi.nix
+++ b/gui/rofi.nix
@@ -1,6 +1,11 @@
-{ pkgs, ... }:
+{ config, pkgs, ... }:
 
-{
+let
+  hidpiExtraConfig = if config.custom.hidpi then ''
+    rofi.dpi: 160
+  '' else "";
+
+in {
   programs.rofi = {
     enable = true;
     location = "top";
@@ -52,6 +57,7 @@
       rofi.combi-modi: windowcd,drun,ssh
       rofi.terminal: kitty
       rofi.ssh-command: {terminal} {ssh-client} {host}
+      ${hidpiExtraConfig}
     '';
   };
 }
diff --git a/gui/twmn.nix b/gui/twmn.nix
index e2dcbcb..de0a84f 100644
--- a/gui/twmn.nix
+++ b/gui/twmn.nix
@@ -1,6 +1,9 @@
-{ pkgs, ... }:
+{ config, pkgs, ... }:
 
-{
+let
+  hidpi = config.custom.hidpi;
+
+in {
   home.packages = with pkgs; [
     twmn
     libnotify
@@ -30,6 +33,8 @@
     background_color=#909737
     bounce=true
     font=Iosevka
+    font_size=${if hidpi then "24" else "14"}
+    height=${if hidpi then "32" else "20"}
     foreground_color=#111111
     in_animation=6
     in_animation_duration=500
diff --git a/gui/xmonad.nix b/gui/xmonad.nix
index 9e8a0a8..52de48d 100644
--- a/gui/xmonad.nix
+++ b/gui/xmonad.nix
@@ -1,6 +1,9 @@
-{ pkgs, ... }:
+{ config, pkgs, ... }:
 
-{
+let
+  hidpi = config.custom.hidpi;
+
+in {
   imports = [
     ./gtk.nix
     ./rofi.nix
@@ -13,6 +16,7 @@
     pointerCursor = {
       package = pkgs.vanilla-dmz;
       name    = "Vanilla-DMZ-AA";
+      size    = if hidpi then 48 else 16;
     };
 
     windowManager.xmonad = {
diff --git a/home.nix b/home.nix
index 671686b..07d081b 100644
--- a/home.nix
+++ b/home.nix
@@ -7,6 +7,7 @@
   };
 
   imports = [
+    ./custom.nix
     ./host/current.nix
   ];
 
diff --git a/host/asterix.nix b/host/asterix.nix
index 1830779..7862a21 100644
--- a/host/asterix.nix
+++ b/host/asterix.nix
@@ -3,7 +3,6 @@
 {
   imports = [
     ../gui/default.nix
-    ../gui/lowdpi.nix
     ../gui/autorandr.nix
     ../gui/networkmanager.nix
   ];
@@ -11,4 +10,6 @@
   home.packages = with pkgs; [
     acpi
   ];
+
+  custom.hidpi = false;
 }
diff --git a/host/athena.nix b/host/athena.nix
index 4e8a824..362d7cd 100644
--- a/host/athena.nix
+++ b/host/athena.nix
@@ -3,7 +3,6 @@
 {
   imports = [
     ../gui/default.nix
-    ../gui/hidpi.nix
     ../gui/networkmanager.nix
     ../gui/stalonetray.nix
     ../gui/redshift.nix
@@ -14,4 +13,6 @@
     acpi
     xorg.xbacklight
   ];
+
+  custom.hidpi = true;
 }
diff --git a/host/obelix.nix b/host/obelix.nix
index 8bbb62a..26a17ea 100644
--- a/host/obelix.nix
+++ b/host/obelix.nix
@@ -3,6 +3,7 @@
 {
   imports = [
     ../gui/default.nix
-    ../gui/lowdpi.nix
   ];
+
+  custom.hidpi = false;
 }
-- 
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