chore(refactor): remove top level tables from presets

## Details

Storing the top level tables in presets is not necessary given how
infrequently we access them (once on each setup). Refactor the presets
module to use functions, use local tables within those functions.

Author: MeanderingProgrammer

doc/render-markdown.txt

@@ -1,4 +1,4 @@
-*render-markdown.txt*        For NVIM v0.11.3        Last change: 2025 July 21
+*render-markdown.txt*        For NVIM v0.11.3        Last change: 2025 July 23
 
 ==============================================================================
 Table of Contents                          *render-markdown-table-of-contents*

lua/render-markdown/health.lua

@@ -5,7 +5,7 @@ local state = require('render-markdown.state')
 local M = {}
 
 ---@private
-M.version = '8.6.7'
+M.version = '8.6.8'
 
 function M.check()
     M.start('version')

lua/render-markdown/lib/presets.lua

@@ -11,91 +11,107 @@ local M = {}
 ---@param user render.md.UserConfig
 ---@return render.md.UserConfig
 function M.get(user)
-    return vim.tbl_deep_extend('force', M.config_preset[user.preset] or {}, {
-        code = M.code_style[(user.code or {}).style] or {},
-        pipe_table = vim.tbl_deep_extend(
-            'force',
-            M.table_preset[(user.pipe_table or {}).preset] or {},
-            M.table_style[(user.pipe_table or {}).style] or {}
-        ),
-        win_options = M.win_options[(user.anti_conceal or {}).enabled] or {},
+    return vim.tbl_deep_extend('force', M.config(user), {
+        code = M.code(user),
+        pipe_table = M.pipe_table(user),
+        win_options = M.win_options(user),
     })
 end
 
 ---@private
----@type table<render.md.config.Preset?, render.md.UserConfig?>
-M.config_preset = {
-    [Preset.obsidian] = { render_modes = true },
-    ---https://github.com/LazyVim/LazyVim/blob/main/lua/lazyvim/plugins/extras/lang/markdown.lua
-    [Preset.lazy] = {
-        file_types = { 'markdown', 'norg', 'rmd', 'org', 'codecompanion' },
-        code = {
-            sign = false,
-            width = 'block',
-            right_pad = 1,
-        },
-        heading = {
-            sign = false,
-            icons = {},
-        },
-        checkbox = {
-            enabled = false,
+---@param user render.md.UserConfig
+---@return render.md.UserConfig
+function M.config(user)
+    ---@type table<render.md.config.Preset?, render.md.UserConfig?>
+    local presets = {
+        [Preset.obsidian] = { render_modes = true },
+        ---https://github.com/LazyVim/LazyVim/blob/main/lua/lazyvim/plugins/extras/lang/markdown.lua
+        [Preset.lazy] = {
+            file_types = { 'markdown', 'norg', 'rmd', 'org', 'codecompanion' },
+            code = {
+                sign = false,
+                width = 'block',
+                right_pad = 1,
+            },
+            heading = {
+                sign = false,
+                icons = {},
+            },
+            checkbox = {
+                enabled = false,
+            },
         },
-    },
-}
+    }
+    return presets[user.preset] or {}
+end
 
 ---@private
----@type table<render.md.code.Style?, render.md.code.UserConfig?>
-M.code_style = {
-    ['none'] = { enabled = false },
-    ['normal'] = { language = false },
-    ['language'] = { disable_background = true, inline = false },
-}
+---@param user render.md.UserConfig
+---@return render.md.code.UserConfig
+function M.code(user)
+    ---@type table<render.md.code.Style?, render.md.code.UserConfig?>
+    local styles = {
+        ['none'] = { enabled = false },
+        ['normal'] = { language = false },
+        ['language'] = { disable_background = true, inline = false },
+    }
+    return styles[(user.code or {}).style] or {}
+end
 
 ---@private
----@type table<render.md.table.Preset?, render.md.table.UserConfig?>
-M.table_preset = {
-    ['round'] = {
-        -- stylua: ignore
-        border = {
-            '╭', '┬', '╮',
-            '├', '┼', '┤',
-            '╰', '┴', '╯',
-            '│', '─',
+---@param user render.md.UserConfig
+---@return render.md.table.UserConfig
+function M.pipe_table(user)
+    ---@type table<render.md.table.Preset?, render.md.table.UserConfig?>
+    local presets = {
+        ['round'] = {
+            -- stylua: ignore
+            border = {
+                '╭', '┬', '╮',
+                '├', '┼', '┤',
+                '╰', '┴', '╯',
+                '│', '─',
+            },
         },
-    },
-    ['double'] = {
-        -- stylua: ignore
-        border = {
-            '╔', '╦', '╗',
-            '╠', '╬', '╣',
-            '╚', '╩', '╝',
-            '║', '═',
+        ['double'] = {
+            -- stylua: ignore
+            border = {
+                '╔', '╦', '╗',
+                '╠', '╬', '╣',
+                '╚', '╩', '╝',
+                '║', '═',
+            },
         },
-    },
-    ['heavy'] = {
-        alignment_indicator = '─',
-        -- stylua: ignore
-        border = {
-            '┏', '┳', '┓',
-            '┣', '╋', '┫',
-            '┗', '┻', '┛',
-            '┃', '━',
+        ['heavy'] = {
+            alignment_indicator = '─',
+            -- stylua: ignore
+            border = {
+                '┏', '┳', '┓',
+                '┣', '╋', '┫',
+                '┗', '┻', '┛',
+                '┃', '━',
+            },
         },
-    },
-}
-
----@private
----@type table<render.md.table.Style?, render.md.table.UserConfig?>
-M.table_style = {
-    ['none'] = { enabled = false },
-    ['normal'] = { border_enabled = false },
-}
+    }
+    ---@type table<render.md.table.Style?, render.md.table.UserConfig?>
+    local styles = {
+        ['none'] = { enabled = false },
+        ['normal'] = { border_enabled = false },
+    }
+    local preset = presets[(user.pipe_table or {}).preset] or {}
+    local style = styles[(user.pipe_table or {}).style] or {}
+    return vim.tbl_deep_extend('force', preset, style)
+end
 
 ---@private
----@type table<boolean?, render.md.window.UserConfigs?>
-M.win_options = {
-    [false] = { concealcursor = { rendered = 'nvic' } },
-}
+---@param user render.md.UserConfig
+---@return render.md.window.UserConfigs
+function M.win_options(user)
+    ---@type table<boolean?, render.md.window.UserConfigs?>
+    local anti_conceals = {
+        [false] = { concealcursor = { rendered = 'nvic' } },
+    }
+    return anti_conceals[(user.anti_conceal or {}).enabled] or {}
+end
 
 return M