feat(edit_src): Add org_edit_src_filetype_map for custom src block filetypes. (#1002)

Author: milanglacier

docs/configuration.org

@@ -364,6 +364,16 @@ The indent value for content within =SRC= block types beyond the
 existing indent of the block itself. Only applied when exiting from an
 =org_edit_special= action on a =SRC= block.
 
+*** org_edit_src_filetype_map
+:PROPERTIES:
+:CUSTOM_ID: org_edit_src_filetype_map
+:END:
+- Type: =table<string, string>=
+- Default: ={}=
+This filetype map associates the language name from an Org source block
+with the corresponding Vim filetype, which is then applied to the temporary
+buffer.
+
 *** org_custom_exports
 :PROPERTIES:
 :CUSTOM_ID: org_custom_exports

lua/orgmode/config/defaults.lua

@@ -61,6 +61,7 @@ local DefaultConfig = {
   },
   org_src_window_setup = 'top 16new',
   org_edit_src_content_indentation = 0,
+  org_edit_src_filetype_map = {},
   org_id_uuid_program = 'uuidgen',
   org_id_ts_format = '%Y%m%d%H%M%S',
   org_id_method = 'uuid',

lua/orgmode/utils/init.lua

@@ -564,6 +564,7 @@ end
 ---@param skip_ftmatch? boolean
 ---@return string
 function utils.detect_filetype(name, skip_ftmatch)
+  local config = require('orgmode.config')
   local map = {
     ['emacs-lisp'] = 'lisp',
     elisp = 'lisp',
@@ -586,6 +587,9 @@ function utils.detect_filetype(name, skip_ftmatch)
   if map[name] then
     return map[name]
   end
+  if config.org_edit_src_filetype_map[name] then
+    return config.org_edit_src_filetype_map[name]
+  end
   return name:lower()
 end