vim-patch:9b03d3e75b42 (#27059)

Translate the Vim9 script Godot files to legacy.

`<scriptcmd>` is not ported yet, so replace it with `<Cmd>` and `<SID>`.
If it's ported, `<scriptcmd>call s:` can be used instead.

Includes changes from:

vim-patch:0daafaa7d99e (was partial, but is now pretty much fully ported)
vim-patch:9712ff1288f9

Co-authored-by: Maxim Kim <habamax@gmail.com>

runtime/ftplugin/gdscript.vim

@@ -0,0 +1,68 @@
+" Vim filetype plugin file
+" Language: gdscript (Godot game engine scripting language)
+" Maintainer: Maxim Kim <habamax@gmail.com>
+" Website: https://github.com/habamax/vim-gdscript
+"
+" This file has been manually translated from Vim9 script.
+
+if exists("b:did_ftplugin") | finish | endif
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+let b:did_ftplugin = 1
+let b:undo_ftplugin = 'setlocal cinkeys<'
+      \ .. '| setlocal indentkeys<'
+      \ .. '| setlocal commentstring<'
+      \ .. '| setlocal suffixesadd<'
+      \ .. '| setlocal foldexpr<'
+      \ .. '| setlocal foldignore<'
+
+setlocal cinkeys-=0#
+setlocal indentkeys-=0#
+setlocal suffixesadd=.gd
+setlocal commentstring=#\ %s
+setlocal foldignore=
+setlocal foldexpr=s:GDScriptFoldLevel()
+
+
+function s:GDScriptFoldLevel() abort
+    let line = getline(v:lnum)
+    if line =~? '^\s*$'
+        return "-1"
+    endif
+
+    let sw = shiftwidth()
+    let indent = indent(v:lnum) / sw
+    let indent_next = indent(nextnonblank(v:lnum + 1)) / sw
+
+    if indent_next > indent && line =~# ':\s*$'
+        return $">{indent_next}"
+    else
+        return $"{indent}"
+    endif
+endfunction
+
+
+if !exists("g:no_plugin_maps")
+    " Next/Previous section
+    function s:NextSection(back, cnt) abort
+        for n in range(a:cnt)
+            call search('^\s*func\s', a:back ? 'bW' : 'W')
+        endfor
+    endfunction
+
+    " Nvim: <scriptcmd> hasn't been ported yet.
+    " nnoremap <silent><buffer> ]] <scriptcmd>NextSection(false, v:count1)<CR>
+    " nnoremap <silent><buffer> [[ <scriptcmd>NextSection(true, v:count1)<CR>
+    nnoremap <silent><buffer> ]] <Cmd>call <SID>NextSection(v:false, v:count1)<CR>
+    nnoremap <silent><buffer> [[ <Cmd>call <SID>NextSection(v:true, v:count1)<CR>
+    xmap <buffer><expr> ]] $'<C-\><C-N>{v:count1}]]m>gv'
+    xmap <buffer><expr> [[ $'<C-\><C-N>{v:count1}[[m>gv'
+    let b:undo_ftplugin ..=
+          \    " | silent exe 'unmap <buffer> [['"
+          \ .. " | silent exe 'unmap <buffer> ]]'"
+endif
+
+let &cpo = s:save_cpo
+unlet s:save_cpo

runtime/ftplugin/gdshader.vim

@@ -0,0 +1,13 @@
+" Vim filetype plugin file
+" Language: Godot shading language
+" Maintainer: Maxim Kim <habamax@gmail.com>
+" Website: https://github.com/habamax/vim-gdscript
+"
+" This file has been manually translated from Vim9 script.
+
+if exists("b:did_ftplugin") | finish | endif
+let b:did_ftplugin = 1
+
+let b:undo_ftplugin = 'setlocal suffixesadd<'
+
+setlocal suffixesadd=.gdshader