feat: disable code based on languages

## Details

Provides a `code.disable` configuration option that accepts a list of
languages. For those languages all code block related rendering will be
disabled.

Co-authored-by: bezlant <abezlyudniy@Snowcrash.local>

Author: MeanderingProgrammer

README.md

@@ -463,6 +463,8 @@ require('render-markdown').setup({
         -- Amount of padding to add around the language.
         -- If a float < 1 is provided it is treated as a percentage of available window space.
         language_pad = 0,
+        -- A list of language names for which rendering will be disabled.
+        disable = {},
         -- A list of language names for which background highlighting will be disabled.
         -- Likely because that language has background highlights itself.
         -- Use a boolean to make behavior apply to all languages.
@@ -1164,6 +1166,8 @@ require('render-markdown').setup({
         -- Amount of padding to add around the language.
         -- If a float < 1 is provided it is treated as a percentage of available window space.
         language_pad = 0,
+        -- A list of language names for which rendering will be disabled.
+        disable = {},
         -- A list of language names for which background highlighting will be disabled.
         -- Likely because that language has background highlights itself.
         -- Use a boolean to make behavior apply to all languages.

doc/render-markdown.txt

@@ -1,4 +1,4 @@
-*render-markdown.txt*      For NVIM v0.11.6      Last change: 2026 February 22
+*render-markdown.txt*        For NVIM v0.11.6       Last change: 2026 March 02
 
 ==============================================================================
 Table of Contents                          *render-markdown-table-of-contents*
@@ -529,6 +529,8 @@ Default Configuration ~
             -- Amount of padding to add around the language.
             -- If a float < 1 is provided it is treated as a percentage of available window space.
             language_pad = 0,
+            -- A list of language names for which rendering will be disabled.
+            disable = {},
             -- A list of language names for which background highlighting will be disabled.
             -- Likely because that language has background highlights itself.
             -- Use a boolean to make behavior apply to all languages.
@@ -1224,6 +1226,8 @@ Code Block Configuration ~
             -- Amount of padding to add around the language.
             -- If a float < 1 is provided it is treated as a percentage of available window space.
             language_pad = 0,
+            -- A list of language names for which rendering will be disabled.
+            disable = {},
             -- A list of language names for which background highlighting will be disabled.
             -- Likely because that language has background highlights itself.
             -- Use a boolean to make behavior apply to all languages.

lua/render-markdown/health.lua

@@ -6,7 +6,7 @@ local state = require('render-markdown.state')
 local M = {}
 
 ---@private
-M.version = '8.11.8'
+M.version = '8.11.9'
 
 function M.check()
     M.start('versions')

lua/render-markdown/render/markdown/code.lua

@@ -5,7 +5,9 @@ local icons = require('render-markdown.lib.icons')
 local str = require('render-markdown.lib.str')
 
 ---@class render.md.code.Data
----@field language integer
+---@field info? render.md.Node
+---@field language? render.md.Node
+---@field language_padding integer
 ---@field padding integer
 ---@field body integer
 ---@field margin integer
@@ -27,26 +29,33 @@ function Render:setup()
     if self.node:height() <= 2 then
         return false
     end
+
+    local info = self.node:child('info_string')
+    local language = info and info:child('language')
+
     local widths = self.node:widths()
     local width = vim.fn.max(widths)
 
-    local language = self:offset(self.config.language_pad, width)
+    local language_padding = self:offset(self.config.language_pad, width)
     local left = self:offset(self.config.left_pad, width)
     local right = self:offset(self.config.right_pad, width)
 
     local body = str.width(self.config.language_left)
         + str.width(self.config.language_right)
-        + language
+        + language_padding
         + widths[1]
     body = math.max(body, left + width + right, self.config.min_width)
 
     self.data = {
+        info = info,
         language = language,
+        language_padding = language_padding,
         padding = left,
         body = body,
         margin = self:offset(self.config.left_margin, body),
     }
-    return true
+
+    return self:enabled(self.config.disable)
 end
 
 ---@private
@@ -66,43 +75,55 @@ function Render:offset(value, used)
     return result
 end
 
+---@private
+---@param disable boolean|string[]
+---@return boolean
+function Render:enabled(disable)
+    if type(disable) == 'boolean' then
+        return not disable
+    else
+        local language = self.data.language
+        return not language or not vim.tbl_contains(disable, language.text)
+    end
+end
+
 ---@protected
 function Render:run()
     local start_row = self.node.start_row
     local end_row = self.node.end_row - 1
 
     local above = self.node:child('fenced_code_block_delimiter', start_row)
     local below = self.node:child('fenced_code_block_delimiter', end_row)
-    local info = self.node:child('info_string')
 
     if self.config.conceal_delimiters then
+        self.marks:over(self.config, true, self.data.info, { conceal = '' })
         self.marks:over(self.config, true, above, { conceal = '' })
         self.marks:over(self.config, true, below, { conceal = '' })
-        self.marks:over(self.config, true, info, { conceal = '' })
     end
 
-    local language = info and info:child('language')
-    if not self:language(info, language, above) then
+    if not self:language(above) then
         self:border(above, self.config.above)
     end
     self:border(below, self.config.below)
 
-    local background = self:background_enabled(language)
+    local background = self:enabled(self.config.disable_background)
     if background then
         self:background(start_row + 1, end_row - 1)
     end
     self:padding(background)
 end
 
 ---@private
----@param info? render.md.Node
----@param language? render.md.Node
 ---@param delim? render.md.Node
 ---@return boolean
-function Render:language(info, language, delim)
+function Render:language(delim)
     if not self.config.language then
         return false
     end
+
+    local info = self.data.info
+    local language = self.data.language
+    local padding = self.data.language_padding
     if not info or not language or not delim then
         return false
     end
@@ -151,15 +172,15 @@ function Render:language(info, language, delim)
     local suffix = 0
     -- space within block after accounting for white space and padding
     local width = self.data.body - delim.start_col
-    local extra = width - prefix - body:width() - suffix - self.data.language ---@type integer
+    local extra = width - prefix - body:width() - suffix - padding ---@type integer
     if self.config.position == 'left' then
-        prefix = prefix + self.data.language
+        prefix = prefix + padding
         suffix = suffix + extra
     elseif self.config.position == 'right' then
         prefix = prefix + extra
-        suffix = suffix + self.data.language
+        suffix = suffix + padding
     else
-        prefix = prefix + self.data.language + math.floor(extra / 2)
+        prefix = prefix + padding + math.floor(extra / 2)
         suffix = suffix + math.ceil(extra / 2)
     end
     if self.config.width == 'full' then
@@ -206,18 +227,6 @@ function Render:border(node, thin)
     })
 end
 
----@private
----@param language? render.md.Node
----@return boolean
-function Render:background_enabled(language)
-    local disable = self.config.disable_background
-    if type(disable) == 'boolean' then
-        return not disable
-    else
-        return language == nil or not vim.tbl_contains(disable, language.text)
-    end
-end
-
 ---@private
 ---@param start_row integer
 ---@param end_row integer

lua/render-markdown/settings.lua

@@ -388,6 +388,7 @@ M.code = {}
 ---@field language_name boolean
 ---@field language_info boolean
 ---@field language_pad number
+---@field disable string[]
 ---@field disable_background boolean|string[]
 ---@field width render.md.code.Width
 ---@field left_margin number
@@ -468,6 +469,8 @@ M.code.default = {
     -- Amount of padding to add around the language.
     -- If a float < 1 is provided it is treated as a percentage of available window space.
     language_pad = 0,
+    -- A list of language names for which rendering will be disabled.
+    disable = {},
     -- A list of language names for which background highlighting will be disabled.
     -- Likely because that language has background highlights itself.
     -- Use a boolean to make behavior apply to all languages.
@@ -546,6 +549,7 @@ function M.code.schema()
         language_name = { type = 'boolean' },
         language_info = { type = 'boolean' },
         language_pad = { type = 'number' },
+        disable = { list = { type = 'string' } },
         disable_background = {
             union = { { list = { type = 'string' } }, { type = 'boolean' } },
         },

lua/render-markdown/types.lua

@@ -99,6 +99,7 @@
 ---@field language_name? boolean
 ---@field language_info? boolean
 ---@field language_pad? number
+---@field disable? string[]
 ---@field disable_background? boolean|string[]
 ---@field width? render.md.code.Width
 ---@field left_margin? number

tests/code_spec.lua

@@ -288,6 +288,41 @@ describe('code', function()
         })
     end)
 
+    it('disable', function()
+        util.setup.text(lines, {
+            code = {
+                disable = { 'lua', 'py', 'rust' },
+            },
+        })
+        util.assert_screen({
+            '```rust',
+            'fn main() {',
+            '    println!("Hello, World!");',
+            '}',
+            '```',
+            '',
+            '● List Divider',
+            '',
+            '  ```py',
+            '  print("hello")',
+            '',
+            '  print("world")',
+            '  ```',
+            '',
+            'Paragraph Divider',
+            '',
+            '  ```lua',
+            "  print('hello')",
+            '',
+            "  print('world')",
+            '  ```',
+            '',
+            '● List Divider',
+            '',
+            "    print('Hello, World!')",
+        })
+    end)
+
     it('quarto executable', function()
         util.setup.text({ '```  {{rust} info', '```' })
         util.assert_screen({