home: vim: tree-sitter: use explicit buffer option

Because of DPMS, I would still get a screen-lock after a 10-minute
timeout.

I think the `xset s {on,off}` part is not _strictly_ necessary, but a
little bit of cargo-culting never hurt anybody.

According to the `xss-lock` man page `xset s on` use hard-coded values,
not my preferred timeouts. Given that I rely on `xautolock` anyway, I
don't care about the timeouts and set them to `0`.

modules/home/vim/plugin/settings/tree-sitter.lua

@@ -76,7 +76,7 @@ local function treesitter_try_attach(buf, language)
     -- Syntax highlighting
     vim.treesitter.start(buf, language)
     -- Indentation
-    vim.bo.indentexpr = "v:lua.require('nvim-treesitter').indentexpr()"
+    vim.bo[buf].indentexpr = "v:lua.require('nvim-treesitter').indentexpr()"
 
     return true
 end

modules/home/wm/default.nix

@@ -1,4 +1,4 @@
-{ config, lib, pkgs, ... }:
+{ config, lib, ... }:
 let
   mkRelatedOption = description: relatedWMs:
     let
@@ -20,14 +20,14 @@ in
 
   options.my.home.wm = with lib; {
     windowManager = mkOption {
-      type = with types; nullOr (enum [ "i3" ]);
+      type = with types; nullOr (enum [ ]);
       default = null;
       example = "i3";
       description = "Which window manager to use for home session";
     };
 
     cursor = {
-      enable = mkRelatedOption "dunst configuration" [ "i3" ];
+      enable = mkRelatedOption "cursor configuration" [ "i3" ];
     };
 
     dunst = {
@@ -68,29 +68,14 @@ in
     };
 
     screen-lock = {
-      enable = mkRelatedOption "automatic X screen locker" [ "i3" ];
+      enable = mkRelatedOption "automatic screen locker" [ "i3" ];
 
       command = mkOption {
         type = types.str;
-        default = "${lib.getExe pkgs.i3lock} -n -c 000000";
         example = "\${lib.getExe pkgs.i3lock} -n -i lock.png";
         description = "Locker command to run";
       };
 
-      cornerLock = {
-        enable = my.mkDisableOption ''
-          Move mouse to upper-left corner to lock instantly, lower-right corner to
-          disable auto-lock.
-        '';
-
-        delay = mkOption {
-          type = types.int;
-          default = 5;
-          example = 15;
-          description = "How many seconds before locking this way";
-        };
-      };
-
       notify = {
         enable = my.mkDisableOption "Notify when about to lock the screen";
 
@@ -100,17 +85,15 @@ in
           example = 15;
           description = ''
             How many seconds in advance should there be a notification.
-            This value must be at lesser than or equal to `cornerLock.delay`
-            when both options are enabled.
           '';
         };
       };
 
       timeout = mkOption {
-        type = types.ints.between 1 60;
+        type = types.int;
         default = 15;
         example = 1;
-        description = "Inactive time interval to lock the screen automatically";
+        description = "Inactive time interval (in minutes) to lock the screen automatically";
       };
     };
   };

modules/home/wm/i3/default.nix

@@ -47,15 +47,25 @@ let
       if ${systemctlUser} is-active xautolock-session.service; then
         ${systemctlUser} stop --user xautolock-session.service
         xset s off
+        xset s 0 0
+        xset -dpms
         ${notify} "Disabled Xautolock"
       else
         ${systemctlUser} start xautolock-session.service
         xset s on
+        xset s 0 0
+        xset +dpms
         ${notify} "Enabled Xautolock"
       fi
     '';
 in
 {
+  options.my.home.wm = with lib; {
+    windowManager = mkOption {
+      type = with types; nullOr (enum [ "i3" ]);
+    };
+  };
+
   config = lib.mkIf isEnabled {
     home.packages = with pkgs; [
       ambroisie.dragger # drag-and-drop from the CLI
@@ -65,6 +75,9 @@ in
       xdotool # Used by 'rofi-rbw', in a mapping
     ];
 
+    # Set `i3lock` as the (default) lock command
+    my.home.wm.screen-lock.command = lib.mkDefault "${lib.getExe pkgs.i3lock} -n -c 000000";
+
     xsession.windowManager.i3 = {
       enable = true;
 
@@ -387,5 +400,10 @@ in
         };
       };
     };
+
+    # Use a grey background
+    xsession.profileExtra = ''
+      ${lib.getExe pkgs.xsetroot} -solid '#333333'
+    '';
   };
 }

modules/home/wm/screen-lock/default.nix

@@ -2,32 +2,22 @@
 let
   cfg = config.my.home.wm.screen-lock;
 
-  notificationCmd =
-    let
-      duration = toString (cfg.notify.delay * 1000);
-      notifyCmd = "${lib.getExe pkgs.libnotify} -u critical -t ${duration}";
-    in
-    # Needs to be surrounded by quotes for systemd to launch it correctly
-    ''"${notifyCmd} -- 'Locking in ${toString cfg.notify.delay} seconds'"'';
+  lockNotifier = pkgs.writeShellApplication {
+    name = "lock-notifier";
+    runtimeInputs = [
+      pkgs.libnotify
+    ];
+    text = ''
+      duration=${toString cfg.notify.delay}
+      notify-send \
+        -u critical \
+        -t "$((duration * 1000))" -- \
+        "Locking in $duration seconds"
+    '';
+  };
 in
 {
   config = lib.mkIf cfg.enable {
-    assertions = [
-      {
-        assertion =
-          let
-            inherit (cfg) cornerLock notify;
-            bothEnabled = cornerLock.enable && notify.enable;
-            cornerLockHigherThanNotify = cornerLock.delay >= notify.delay;
-          in
-          bothEnabled -> cornerLockHigherThanNotify;
-        message = ''
-          `config.my.home.wm.notify.delay` cannot have a value higher than
-          `config.my.home.wm.cornerLock.delay`.
-        '';
-      }
-    ];
-
     services.screen-locker = {
       enable = true;
 
@@ -36,19 +26,11 @@ in
       lockCmd = cfg.command;
 
       xautolock = {
-        extraOptions = lib.optionals cfg.cornerLock.enable [
-          # Mouse corners: instant lock on upper-left, never lock on lower-right
-          "-cornerdelay"
-          "${toString cfg.cornerLock.delay}"
-          "-cornerredelay"
-          "${toString cfg.cornerLock.delay}"
-          "-corners"
-          "+00-"
-        ] ++ lib.optionals cfg.notify.enable [
+        extraOptions = lib.optionals cfg.notify.enable [
           "-notify"
           "${toString cfg.notify.delay}"
           "-notifier"
-          notificationCmd
+          (lib.getExe lockNotifier)
         ];
       };
     };