Add setting to hide hover information empty error

Author: il-n-minamikawa

autoload/lsp/internal/document_hover/under_cursor.vim

@@ -81,11 +81,30 @@ function! lsp#internal#document_hover#under_cursor#getpreviewwinid() abort
     return v:null
 endfunction
 
+function s:check_hover_response_empty(response) abort
+    if !has_key(a:response, 'result')
+        return 1
+    endif
+
+    if empty(a:response['result'])
+        return 1
+    endif
+
+    if empty(a:response['result']['contents'])
+        return 1
+    endif
+
+    return 0
+endfunction
+
 function! s:show_hover(ui, server_name, request, response) abort
-    if !has_key(a:response, 'result') || empty(a:response['result']) || 
-        \ empty(a:response['result']['contents'])
-        call lsp#utils#error('No hover information found in server - ' . a:server_name)
-        return
+    if s:check_hover_response_empty(a:response)
+        if g:lsp_hover_echo_empty_message
+            call lsp#utils#error('No hover information found in server - ' . a:server_name)
+            return
+        else
+            return
+        endif
     endif
 
     echo ''

plugin/lsp.vim

@@ -69,6 +69,7 @@ let g:lsp_show_workspace_edits = get(g:, 'lsp_show_workspace_edits', 0)
 let g:lsp_fold_enabled = get(g:, 'lsp_fold_enabled', 1)
 let g:lsp_hover_conceal = get(g:, 'lsp_hover_conceal', 1)
 let g:lsp_hover_ui = get(g:, 'lsp_hover_ui', '')
+let g:lsp_hover_echo_empty_message = get(g:, 'lsp_hover_echo_empty_message', 1)
 let g:lsp_ignorecase = get(g:, 'lsp_ignorecase', &ignorecase)
 let g:lsp_semantic_enabled = get(g:, 'lsp_semantic_enabled', 0)
 let g:lsp_semantic_delay = get(g:, 'lsp_semantic_delay', 500)