From 7fd54a50d8b2eaba709ecf1071154a3a1f00a0bc Mon Sep 17 00:00:00 2001
From: OliMoli <olimoli@disroot.org>
Date: Fri, 31 Jul 2026 23:27:14 +0200
Subject: [PATCH] feat(home): add keybind generator script

---
 modules/home/lib/generators/generators.nix |  19 +++
 modules/home/lib/generators/keybindings.py | 129 +++++++++++++++++++++
 modules/home/scroll.nix                    | 114 ++----------------
 3 files changed, 158 insertions(+), 104 deletions(-)
 create mode 100644 modules/home/lib/generators/generators.nix
 create mode 100755 modules/home/lib/generators/keybindings.py

diff --git a/modules/home/lib/generators/generators.nix b/modules/home/lib/generators/generators.nix
new file mode 100644
index 0000000..e6cdb94
--- /dev/null
+++ b/modules/home/lib/generators/generators.nix
@@ -0,0 +1,19 @@
+{
+  cfg,
+  pkgs,
+  moduleName,
+}:
+{
+  keybindings =
+    if (cfg.package == null) then
+      { }
+    else
+      import (pkgs.runCommand "sway-keybindings"
+        {
+          nativeBuildInputs = [ pkgs.python3 ];
+        }
+        ''
+          python ${./keybindings.py} ${cfg.package}/etc/${moduleName}/config > $out
+        ''
+      ) { inherit cfg; };
+}
diff --git a/modules/home/lib/generators/keybindings.py b/modules/home/lib/generators/keybindings.py
new file mode 100755
index 0000000..82c892a
--- /dev/null
+++ b/modules/home/lib/generators/keybindings.py
@@ -0,0 +1,129 @@
+#!/usr/bin/env python3
+
+"""
+Converts the Sway config into a Nix attribute set.
+
+Why?
+If keybindings were provided manually, they would have to also be updated manually.
+This would add more maintenance overhead.
+
+Why Python?
+It's a lot simpler and more readable to use Python over Nix for something like this.
+"""
+
+from collections import defaultdict
+import sys
+
+CONFIG = sys.argv[1]
+
+
+def escape(s: str) -> str:
+    """Basic function to escape some of the Nix expressions"""
+    return s.replace("\\", "\\\\").replace('"', '\\"').replace("${", "''${")
+
+
+try:
+    with open(CONFIG) as f:
+        lines: list[str] = f.readlines()
+except:
+    print("{}")
+    sys.exit()
+
+keybindings: dict[str, str] = {}
+modes: defaultdict[str, dict[str, str]] = defaultdict(dict)
+current_mode: str | None = None
+
+for line in lines:
+    stripped: str = line.strip()
+
+    if stripped == "}" and current_mode is not None:
+        # Exit mode section:
+        # }
+        current_mode = None
+
+    elif stripped.startswith("mode"):
+        # Enter mode section:
+        # mode "mode" {
+
+        # Remove mode prefix
+        nomode: str = "mode".join(stripped.split("mode")[1:]).strip()
+
+        if nomode.startswith('"'):
+            # Get name from in between the quotes
+            # (not implementing escaping since it isn't necessary)
+            current_mode = nomode.split('"')[1]
+        elif nomode.startswith("'"):
+            # Same as above but with single quotes
+            current_mode = nomode.split("'")[1]
+        else:
+            # Get name until "{"
+            # (not implementing one line mode definitions since those don't appear in def config)
+            current_mode = nomode.split("{")[0].strip()
+
+    elif stripped.startswith("bindsym"):
+        # Parse bindsym line:
+        # bindsym [--args] keycombo command
+
+        # Remove bindsym
+        nobindsym: str = "bindsym".join(stripped.split("bindsym")[1:]).strip()
+
+        # Then iterate through each word
+        key_list: list[str] = []
+        value_list: list[str] = []
+
+        bind_added: bool = False
+
+        for word in nobindsym.split(" "):
+            if word.startswith("--") and not bind_added:
+                # Add args
+                key_list.append(word)
+            elif not bind_added:
+                # Add keycombo
+                key_list.append(word)
+                bind_added = True
+            else:
+                # Add command (rest of the words)
+                value_list.append(word)
+
+        key: str = (
+            escape(" ".join(key_list))
+            .replace("$mod", "${cfg.config.modifier}")
+            .replace("$term", "${cfg.config.terminal}")
+            .replace("$menu", "${cfg.config.menu}")
+            .replace("$left", "${cfg.config.left}")
+            .replace("$right", "${cfg.config.right}")
+            .replace("$up", "${cfg.config.up}")
+            .replace("$down", "${cfg.config.down}")
+        )
+        value: str = escape(" ".join(value_list))
+
+        if current_mode is None:
+            keybindings.update({key: value})
+        else:
+            # Here defaultdict will create the current_mode key automatically
+            # so we don't have to check if it exists
+            modes[current_mode].update({key: value})
+
+print("{ cfg }:")
+print("{")
+
+print("  keybindings = {")
+
+for keycombo, command in keybindings.items():
+    print(f'    "{keycombo}" = "{command}";')
+
+print("  };")
+
+print("  modes = {")
+
+for mode, binds in modes.items():
+    print(f'    "{mode}" = ' + "{")
+
+    for keycombo, command in binds.items():
+        print(f'      "{keycombo}" = "{command}";')
+
+    print("    };")
+
+print("};")
+
+print("}")
diff --git a/modules/home/scroll.nix b/modules/home/scroll.nix
index 1dbefad..c43781f 100644
--- a/modules/home/scroll.nix
+++ b/modules/home/scroll.nix
@@ -32,6 +32,14 @@ let
     capitalModuleName = "Scroll";
   };
 
+  generators = import ./lib/generators/generators.nix {
+    inherit
+      cfg
+      pkgs
+      ;
+    moduleName = "scroll";
+  };
+
   configModule = types.submodule {
     options = {
       inherit (commonOptions)
@@ -85,75 +93,7 @@ let
       keybindings = mkOption {
         type = types.attrsOf (types.nullOr types.str);
         # https://github.com/dawsers/scroll/blob/master/config.in#L129
-        default = lib.mapAttrs (_n: lib.mkOptionDefault) {
-          # TODO: add scroll keybindings
-          "${cfg.config.modifier}+Return" = "exec ${cfg.config.terminal}";
-          "${cfg.config.modifier}+Shift+q" = "kill";
-          "${cfg.config.modifier}+d" = "exec ${cfg.config.menu}";
-
-          "${cfg.config.modifier}+${cfg.config.left}" = "focus left";
-          "${cfg.config.modifier}+${cfg.config.down}" = "focus down";
-          "${cfg.config.modifier}+${cfg.config.up}" = "focus up";
-          "${cfg.config.modifier}+${cfg.config.right}" = "focus right";
-
-          "${cfg.config.modifier}+Left" = "focus left";
-          "${cfg.config.modifier}+Down" = "focus down";
-          "${cfg.config.modifier}+Up" = "focus up";
-          "${cfg.config.modifier}+Right" = "focus right";
-
-          "${cfg.config.modifier}+Shift+${cfg.config.left}" = "move left";
-          "${cfg.config.modifier}+Shift+${cfg.config.down}" = "move down";
-          "${cfg.config.modifier}+Shift+${cfg.config.up}" = "move up";
-          "${cfg.config.modifier}+Shift+${cfg.config.right}" = "move right";
-
-          "${cfg.config.modifier}+Shift+Left" = "move left";
-          "${cfg.config.modifier}+Shift+Down" = "move down";
-          "${cfg.config.modifier}+Shift+Up" = "move up";
-          "${cfg.config.modifier}+Shift+Right" = "move right";
-
-          "${cfg.config.modifier}+b" = "splith";
-          "${cfg.config.modifier}+v" = "splitv";
-          "${cfg.config.modifier}+f" = "fullscreen toggle";
-          "${cfg.config.modifier}+a" = "focus parent";
-
-          "${cfg.config.modifier}+s" = "layout stacking";
-          "${cfg.config.modifier}+w" = "layout tabbed";
-          "${cfg.config.modifier}+e" = "layout toggle split";
-
-          "${cfg.config.modifier}+Shift+space" = "floating toggle";
-          "${cfg.config.modifier}+space" = "focus mode_toggle";
-
-          "${cfg.config.modifier}+1" = "workspace number 1";
-          "${cfg.config.modifier}+2" = "workspace number 2";
-          "${cfg.config.modifier}+3" = "workspace number 3";
-          "${cfg.config.modifier}+4" = "workspace number 4";
-          "${cfg.config.modifier}+5" = "workspace number 5";
-          "${cfg.config.modifier}+6" = "workspace number 6";
-          "${cfg.config.modifier}+7" = "workspace number 7";
-          "${cfg.config.modifier}+8" = "workspace number 8";
-          "${cfg.config.modifier}+9" = "workspace number 9";
-          "${cfg.config.modifier}+0" = "workspace number 10";
-
-          "${cfg.config.modifier}+Shift+1" = "move container to workspace number 1";
-          "${cfg.config.modifier}+Shift+2" = "move container to workspace number 2";
-          "${cfg.config.modifier}+Shift+3" = "move container to workspace number 3";
-          "${cfg.config.modifier}+Shift+4" = "move container to workspace number 4";
-          "${cfg.config.modifier}+Shift+5" = "move container to workspace number 5";
-          "${cfg.config.modifier}+Shift+6" = "move container to workspace number 6";
-          "${cfg.config.modifier}+Shift+7" = "move container to workspace number 7";
-          "${cfg.config.modifier}+Shift+8" = "move container to workspace number 8";
-          "${cfg.config.modifier}+Shift+9" = "move container to workspace number 9";
-          "${cfg.config.modifier}+Shift+0" = "move container to workspace number 10";
-
-          "${cfg.config.modifier}+Shift+minus" = "move scratchpad";
-          "${cfg.config.modifier}+minus" = "scratchpad show";
-
-          "${cfg.config.modifier}+Shift+c" = "reload";
-          "${cfg.config.modifier}+Shift+e" =
-            "exec swaynag -t warning -m 'You pressed the exit shortcut. Do you really want to exit sway? This will end your Wayland session.' -b 'Yes, exit sway' 'swaymsg exit'";
-
-          "${cfg.config.modifier}+r" = "mode resize";
-        };
+        default = lib.mapAttrs (_n: lib.mkOptionDefault) generators.keybindings.keybindings;
         defaultText = "Default scroll keybindings.";
         description = ''
           An attribute set that assigns a key press to an action using a key symbol.
@@ -259,41 +199,7 @@ let
 
       modes = mkOption {
         type = types.attrsOf (types.attrsOf types.str);
-        default = {
-          resize = {
-            "${cfg.config.left}" = "resize shrink width 10 px";
-            "${cfg.config.down}" = "resize grow height 10 px";
-            "${cfg.config.up}" = "resize shrink height 10 px";
-            "${cfg.config.right}" = "resize grow width 10 px";
-            "Left" = "resize shrink width 10 px";
-            "Down" = "resize grow height 10 px";
-            "Up" = "resize shrink height 10 px";
-            "Right" = "resize grow width 10 px";
-            "Escape" = "mode default";
-            "Return" = "mode default";
-          };
-          # TODO: add more modes
-        };
-        defaultText = lib.literalExpression ''
-          {
-            resize = {
-              # Binds arrow keys to resizing commands
-              ''${cfg.config.left}" = "resize shrink width 10 px";
-              ''${cfg.config.down}" = "resize grow height 10 px";
-              ''${cfg.config.up}" = "resize shrink height 10 px";
-              ''${cfg.config.right}" = "resize grow width 10 px";
-
-              "Left" = "resize shrink width 10 px";
-              "Down" = "resize grow height 10 px";
-              "Up" = "resize shrink height 10 px";
-              "Right" = "resize grow width 10 px";
-
-              # Exit resize mode
-              "Escape" = "mode default";
-              "Return" = "mode default";
-            };
-          }
-        '';
+        default = generators.keybindings.modes;
         description = ''
           An attribute set that defines binding modes and keybindings
           inside them