treewide: begin restructuring the module tree

modules/plugins/visuals/config.nix

@@ -0,0 +1,145 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib.modules) mkIf mkMerge;
+  inherit (lib.strings) optionalString;
+  inherit (lib.trivial) boolToString;
+  inherit (lib.nvim.binds) mkBinding;
+  inherit (lib.nvim.dag) entryAnywhere;
+
+  cfg = config.vim.visuals;
+in {
+  config = mkIf cfg.enable (mkMerge [
+    (mkIf cfg.indentBlankline.enable {
+      vim.startPlugins = ["indent-blankline"];
+      vim.luaConfigRC.indent-blankline = entryAnywhere ''
+        -- highlight error: https://github.com/lukas-reineke/indent-blankline.nvim/issues/59
+        -- vim.wo.colorcolumn = "99999"
+        vim.opt.list = true
+
+        ${optionalString (cfg.indentBlankline.eolChar != null) ''
+          vim.opt.listchars:append({ eol = "${cfg.indentBlankline.eolChar}" })
+        ''}
+        ${optionalString (cfg.indentBlankline.fillChar != null) ''
+          vim.opt.listchars:append({ space = "${cfg.indentBlankline.fillChar}" })
+        ''}
+
+        require("ibl").setup {
+          enabled = true,
+          debounce = ${toString cfg.indentBlankline.debounce},
+          indent = { char = "${cfg.indentBlankline.indent.char}" },
+
+          viewport_buffer = {
+            min = ${toString cfg.indentBlankline.viewportBuffer.min},
+            max = ${toString cfg.indentBlankline.viewportBuffer.max},
+          },
+
+          scope = {
+            enabled = ${boolToString cfg.indentBlankline.scope.enabled},
+            show_end = ${boolToString cfg.indentBlankline.scope.showEndOfLine}
+          },
+        }
+      '';
+    })
+
+    (mkIf cfg.cursorline.enable {
+      vim.startPlugins = ["nvim-cursorline"];
+      vim.luaConfigRC.cursorline = entryAnywhere ''
+        require('nvim-cursorline').setup {
+          cursorline = {
+            timeout = ${toString cfg.cursorline.lineTimeout},
+            number = ${boolToString (!cfg.cursorline.lineNumbersOnly)},
+          }
+        }
+      '';
+    })
+
+    (mkIf cfg.nvimWebDevicons.enable {
+      vim.startPlugins = ["nvim-web-devicons"];
+    })
+
+    (mkIf cfg.scrollBar.enable {
+      vim.startPlugins = ["scrollbar-nvim"];
+      vim.luaConfigRC.scrollBar = entryAnywhere ''
+        require('scrollbar').setup{
+            excluded_filetypes = {
+              'prompt',
+              'TelescopePrompt',
+              'noice',
+              'NvimTree',
+              'alpha',
+              'code-action-menu-menu',
+              'code-action-menu-warning-message',
+              'notify',
+              'Navbuddy'
+            },
+          }
+      '';
+    })
+
+    (mkIf cfg.smoothScroll.enable {
+      vim.startPlugins = ["cinnamon-nvim"];
+      vim.luaConfigRC.smoothScroll = entryAnywhere ''
+        require('cinnamon').setup()
+      '';
+    })
+
+    (mkIf cfg.cellularAutomaton.enable {
+      vim.startPlugins = ["cellular-automaton"];
+
+      vim.maps.normal = mkBinding cfg.cellularAutomaton.mappings.makeItRain "<cmd>CellularAutomaton make_it_rain<CR>" "Make it rain";
+
+      vim.luaConfigRC.cellularAUtomaton = entryAnywhere ''
+        local config = {
+              fps = 50,
+              name = 'slide',
+            }
+
+            -- init function is invoked only once at the start
+            -- config.init = function (grid)
+            --
+            -- end
+
+            -- update function
+            config.update = function (grid)
+            for i = 1, #grid do
+              local prev = grid[i][#(grid[i])]
+                for j = 1, #(grid[i]) do
+                  grid[i][j], prev = prev, grid[i][j]
+                end
+              end
+              return true
+            end
+
+            require("cellular-automaton").register_animation(config)
+      '';
+    })
+
+    (mkIf cfg.highlight-undo.enable {
+      vim.startPlugins = ["highlight-undo"];
+      vim.luaConfigRC.highlight-undo = entryAnywhere ''
+        require('highlight-undo').setup({
+          duration = ${toString cfg.highlight-undo.duration},
+          highlight_for_count = ${boolToString cfg.highlight-undo.highlightForCount},
+          undo = {
+            hlgroup = ${cfg.highlight-undo.undo.hlGroup},
+            mode = 'n',
+            lhs = 'u',
+            map = 'undo',
+            opts = {}
+          },
+
+          redo = {
+            hlgroup = ${cfg.highlight-undo.redo.hlGroup},
+            mode = 'n',
+            lhs = '<C-r>',
+            map = 'redo',
+            opts = {}
+          },
+        })
+      '';
+    })
+  ]);
+}