Check availability

Author: hrsh7th

autoload/lsp/internal/linked_editing_range.vim

@@ -9,10 +9,9 @@ let s:state['changenr'] = -1
 let s:state['changedtick'] = -1
 
 function! lsp#internal#linked_editing_range#_enable() abort
-    if !s:TextEdit.is_text_mark_preserved()
+    if !s:enabled()
         return
     endif
-    if !g:lsp_linked_editing_range_enabled | return | endif
 
     let s:Dispose = lsp#callbag#merge(
     \     lsp#callbag#pipe(
@@ -43,10 +42,7 @@ function! lsp#internal#linked_editing_range#_disable() abort
 endfunction
 
 function! lsp#internal#linked_editing_range#prepare() abort
-    if !s:TextEdit.is_text_mark_preserved()
-        return ''
-    endif
-    if !g:lsp_linked_editing_range_enabled
+    if !s:enabled()
         return ''
     endif
 
@@ -60,6 +56,10 @@ function! lsp#internal#linked_editing_range#prepare() abort
     return ''
 endfunction
 
+function! s:enabled(...) abort
+    return g:lsp_linked_editing_range_enabled && s:TextEdit.is_text_mark_preserved() && s:TextMark.is_available()
+endfunction
+
 function! s:request_sync() abort
     let l:server = lsp#get_allowed_servers(&filetype)
     let l:server = filter(l:server, 'lsp#capabilities#has_linked_editing_range_provider(v:val)')
@@ -142,4 +142,3 @@ function! s:sync() abort
     let s:state['changenr'] = changenr()
     let s:state['changedtick'] = b:changedtick
 endfunction
-

autoload/vital/_lsp/VS/Vim/Buffer/TextMark.vim

@@ -4,7 +4,7 @@
 function! s:_SID() abort
   return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
 endfunction
-execute join(['function! vital#_lsp#VS#Vim#Buffer#TextMark#import() abort', printf("return map({'_vital_depends': '', 'clear': '', 'set': '', 'get': '', '_vital_loaded': ''}, \"vital#_lsp#function('<SNR>%s_' . v:key)\")", s:_SID()), 'endfunction'], "\n")
+execute join(['function! vital#_lsp#VS#Vim#Buffer#TextMark#import() abort', printf("return map({'_vital_depends': '', 'clear': '', 'set': '', 'is_available': '', 'get': '', '_vital_loaded': ''}, \"vital#_lsp#function('<SNR>%s_' . v:key)\")", s:_SID()), 'endfunction'], "\n")
 delfunction s:_SID
 " ___vital___
 "
@@ -24,6 +24,17 @@ endfunction
 let s:nvim_namespace = {}
 let s:vim_prop_types = {}
 
+"
+" is_available
+"
+function! s:is_available() abort
+  if has('nvim')
+    return exists('*nvim_buf_set_text')
+  else
+    return exists('*prop_type_add') && exists('*prop_add')
+  endif
+endfunction
+
 "
 " @param {number} bufnr
 " @param {string} id