feat: allow ignoring languages to fix conflicts with image renderers

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

@@ -23,6 +23,16 @@ function Render:setup()
     if not self.config.enabled then
         return false
     end
+    -- ignore specific languages
+    local info = self.node:child('info_string')
+    local language = info and info:child('language')
+    if
+        language
+        and self.config.ignore
+        and vim.tbl_contains(self.config.ignore, language.text)
+    then
+        return false
+    end
     -- skip single line code block
     if self.node:height() <= 2 then
         return false

lua/render-markdown/settings.lua

@@ -381,6 +381,7 @@ M.code = {}
 
 ---@class (exact) render.md.code.Config: render.md.base.Config
 ---@field sign boolean
+---@field ignore string[]
 ---@field conceal_delimiters boolean
 ---@field language boolean
 ---@field position render.md.code.Position
@@ -447,6 +448,8 @@ M.code.default = {
     enabled = true,
     -- Additional modes to render code blocks.
     render_modes = false,
+    -- List of languages to ignore rendering for.
+    ignore = {},
     -- Turn on / off sign column related rendering.
     sign = true,
     -- Whether to conceal nodes at the top and bottom of code blocks.
@@ -536,6 +539,7 @@ M.code.default = {
 ---@return render.md.Schema
 function M.code.schema()
     return M.base.schema({
+        ignore = { list = { type = 'string' } },
         sign = { type = 'boolean' },
         conceal_delimiters = { type = 'boolean' },
         language = { type = 'boolean' },

lua/render-markdown/types.lua

@@ -92,6 +92,7 @@
 
 ---@class (exact) render.md.code.UserConfig: render.md.base.UserConfig
 ---@field sign? boolean
+---@field ignore? string[]
 ---@field conceal_delimiters? boolean
 ---@field language? boolean
 ---@field position? render.md.code.Position

tests/ignore_spec.lua

@@ -0,0 +1,34 @@
+local util = require('tests.util')
+
+describe('code ignore', function()
+    it('ignores configured languages', function()
+        util.setup.text({
+            '```mermaid',
+            'graph TD;',
+            '    A-->B;',
+            '```',
+        }, {
+            code = {
+                ignore = { 'mermaid' },
+            },
+        })
+
+        -- Should have no marks
+        util.assert_marks({})
+    end)
+
+    it('ignores nothing by default', function()
+        util.setup.text({
+            '```mermaid',
+            'graph TD;',
+            '    A-->B;',
+            '```',
+        })
+
+        util.assert_screen({
+            'mermaid█████████████████████████████████████████████████████████████████████████',
+            'graph TD;',
+            '    A-->B;',
+        })
+    end)
+end)