modules: start breaking down core modules; simplify tree structure

modules/plugins/utility/gestures/gesture-nvim/config.nix

@@ -0,0 +1,55 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib) addDescriptionsToMappings mkIf mkMerge mkSetLuaBinding nvim;
+
+  cfg = config.vim.gestures.gesture-nvim;
+
+  self = import ./gesture-nvim.nix {inherit lib;};
+
+  mappingDefinitions = self.options.vim.gestures.gesture-nvim.mappings;
+  mappings = addDescriptionsToMappings cfg.mappings mappingDefinitions;
+in {
+  config = mkIf cfg.enable {
+    vim.startPlugins = ["gesture-nvim"];
+
+    vim.maps.normal = mkMerge [
+      (mkSetLuaBinding mappings.draw "require('gesture').draw")
+      (mkSetLuaBinding mappings.finish "require('gesture').finish")
+      (mkIf (mappings.draw.value == "<RightDrag>") {
+        "<RightMouse>" = {action = "<Nop>";};
+      })
+    ];
+
+    vim.luaConfigRC.gesture-nvim = nvim.dag.entryAnywhere ''
+      vim.opt.mouse = "a"
+
+      local gesture = require("gesture")
+      gesture.register({
+        name = "scroll to bottom",
+        inputs = { gesture.up(), gesture.down() },
+        action = "normal! G",
+      })
+      gesture.register({
+        name = "next tab",
+        inputs = { gesture.right() },
+        action = "tabnext",
+      })
+      gesture.register({
+        name = "previous tab",
+        inputs = { gesture.left() },
+        action = function(ctx) -- also can use callable
+          vim.cmd.tabprevious()
+        end,
+      })
+      gesture.register({
+        name = "go back",
+        inputs = { gesture.right(), gesture.left() },
+        -- map to `<C-o>` keycode
+        action = [[lua vim.api.nvim_feedkeys(vim.api.nvim_replace_termcodes("<C-o>", true, false, true), "n", true)]],
+      })
+    '';
+  };
+}

modules/plugins/utility/gestures/gesture-nvim/default.nix

@@ -0,0 +1,6 @@
+_: {
+  imports = [
+    ./gesture-nvim.nix
+    ./config.nix
+  ];
+}

modules/plugins/utility/gestures/gesture-nvim/gesture-nvim.nix

@@ -0,0 +1,12 @@
+{lib, ...}: let
+  inherit (lib) mkEnableOption mkMappingOption;
+in {
+  options.vim.gestures.gesture-nvim = {
+    enable = mkEnableOption "gesture-nvim: mouse gestures";
+
+    mappings = {
+      draw = mkMappingOption "Start drawing [gesture.nvim]" "<LeftDrag>";
+      finish = mkMappingOption "Finish drawing [gesture.nvim]" "<LeftRelease>";
+    };
+  };
+}