Implement g:nvim_ghost_keep_buffers

When set to 1, buffers won't be deleted when the connection is closed
from the browser side. This avoids any data loss in case of browser
crashes.

autoload/nvim_ghost.vim

@@ -16,15 +16,15 @@ endfunction
 function! s:start_server_or_request_focus()
   " If we start the server, we are already focused, so we don't need to
   " request_focus separately
-  if ! nvim_ghost#helper#is_running()
-    call nvim_ghost#helper#start_server()
+  if ! nvim_ghost#server#is_running()
+    call nvim_ghost#server#start_server()
   else
-    call nvim_ghost#helper#request_focus()
+    call nvim_ghost#server#request_focus()
   endif
 endfunction
 
 function! nvim_ghost#disable()
-  call nvim_ghost#helper#session_closed()
+  call nvim_ghost#server#session_closed()
   autocmd! nvim_ghost
   if !exists('g:_nvim_ghost_supports_focus')
     autocmd! _nvim_ghost_does_not_support_focus
@@ -41,8 +41,8 @@ function! nvim_ghost#enable(defer = 0)
     if a:defer
       autocmd UIEnter   * call s:start_server_or_request_focus()
     endif
-    autocmd FocusGained * call nvim_ghost#helper#request_focus()
-    autocmd VimLeavePre * call nvim_ghost#helper#session_closed()
+    autocmd FocusGained * call nvim_ghost#server#request_focus()
+    autocmd VimLeavePre * call nvim_ghost#server#session_closed()
   augroup END
 
   " :doau causes error if augroup not defined
@@ -72,7 +72,7 @@ function! nvim_ghost#enable(defer = 0)
     let s:focused = v:true
     fun! s:focus_gained()
       if !s:focused
-        call nvim_ghost#helper#request_focus()
+        call nvim_ghost#server#request_focus()
         let s:focused = v:true
       endif
     endfun

autoload/nvim_ghost/helpers.vim

@@ -0,0 +1,11 @@
+if !has('nvim')
+  finish
+endif
+
+function! nvim_ghost#helpers#buf_del(bufnum) abort
+  if !g:nvim_ghost_keep_buffers
+    exe "bdelete " .. a:bufnum
+    return
+  endif
+  exe a:bufnum .. "bufdo setl buftype="
+endfunction

autoload/nvim_ghost/installer.vim

@@ -13,8 +13,8 @@ function! s:report_result(exitcode) abort
 endfunction
 
 function! nvim_ghost#installer#install(callback) abort
-  if nvim_ghost#helper#is_running()
-    call nvim_ghost#helper#kill_server()
+  if nvim_ghost#server#is_running()
+    call nvim_ghost#server#kill_server()
   endif
 
   echom '[nvim-ghost] Downloading binary'

autoload/nvim_ghost/helper.vim → autoload/nvim_ghost/server.vim

@@ -11,15 +11,15 @@ endif
 let s:saved_updatetime = &updatetime
 let s:can_use_cursorhold = v:false
 let s:joblog_arguments = !g:nvim_ghost_logging_enabled ? {} : {
-      \'on_stdout':{id,data,type->nvim_ghost#helper#joboutput_logger(data,type)},
-      \'on_stderr':{id,data,type->nvim_ghost#helper#joboutput_logger(data,type)},
+      \'on_stdout':{id,data,type->nvim_ghost#server#joboutput_logger(data,type)},
+      \'on_stderr':{id,data,type->nvim_ghost#server#joboutput_logger(data,type)},
       \}
 let s:joblog_arguments_nokill = extend(copy(s:joblog_arguments), {
       \'detach': v:true,
       \'cwd': g:nvim_ghost_installation_dir,
       \})
 
-function! nvim_ghost#helper#is_running() abort  " {{{1
+function! nvim_ghost#server#is_running() abort  " {{{1
   let v:errmsg = ''
   let l:url = s:localhost .. ':' .. $GHOSTTEXT_SERVER_PORT
   let l:opts = #{ data_buffered: v:true }
@@ -76,10 +76,10 @@ function! s:send_GET_request(url) abort "{{{1
   call chansend(l:connection, "\r\n")
 
   " We're done, log what we sent
-  call nvim_ghost#helper#joboutput_logger(['Sent ' . a:url], '')
+  call nvim_ghost#server#joboutput_logger(['Sent ' . a:url], '')
 endfunction
 
-function! nvim_ghost#helper#start_server() abort " {{{1
+function! nvim_ghost#server#start_server() abort " {{{1
   if has('win32')
     call jobstart(['cscript.exe',
           \g:nvim_ghost_scripts_dir . 'start_server.vbs'])
@@ -95,19 +95,19 @@ function! nvim_ghost#helper#start_server() abort " {{{1
   endif
 endfunction
 
-function! nvim_ghost#helper#kill_server() abort  " {{{1
+function! nvim_ghost#server#kill_server() abort  " {{{1
   call s:send_GET_request('/exit')
 endfunction
 
-function! nvim_ghost#helper#request_focus() abort  " {{{1
+function! nvim_ghost#server#request_focus() abort  " {{{1
   call s:send_GET_request('/focus?focus=' . v:servername)
 endfunction
 
-function! nvim_ghost#helper#session_closed() abort " {{{1
+function! nvim_ghost#server#session_closed() abort " {{{1
   call s:send_GET_request('/session-closed?session=' . v:servername)
   call rpcnotify(0, "nvim_ghost_exit_event")
 endfunction
-function! nvim_ghost#helper#joboutput_logger(data,type) abort  " {{{1
+function! nvim_ghost#server#joboutput_logger(data,type) abort  " {{{1
   if !g:nvim_ghost_logging_enabled || g:nvim_ghost_super_quiet
     return
   endif

binary.py

@@ -18,7 +18,7 @@
 from simple_websocket_server import WebSocket
 from simple_websocket_server import WebSocketServer
 
-BUILD_VERSION: str = "v0.5.1"
+BUILD_VERSION: str = "v0.5.1-keepbuf.1"
 
 WINDOWS: bool = os.name == "nt"
 LOCALHOST: str = "127.0.0.1" if WINDOWS else "localhost"
@@ -370,7 +370,9 @@ def handle_close(self):
         )
 
         # Delete buffer and stop event loop
-        self.neovim_handle.command(f"bdelete {self.buffer_handle.number}")
+        self.neovim_handle.command(
+            f"call nvim_ghost#helpers#buf_del({self.buffer_handle.number})"
+        )
         self.neovim_handle.close()
         self.loop_neovim_handle.stop_loop()
         self.loop_neovim_handle.close()

binary_version

@@ -1 +1 @@
-v0.5.1
+v0.5.1-keepbuf.1

plugin/nvim_ghost.vim

@@ -10,6 +10,7 @@ endif
 let g:nvim_ghost_autostart        = get(g:,'nvim_ghost_autostart', 1)
 let g:nvim_ghost_use_script       = get(g:,'nvim_ghost_use_script', 0)
 let g:nvim_ghost_super_quiet      = get(g:,'nvim_ghost_super_quiet', 0)
+let g:nvim_ghost_keep_buffers     = get(g:,'nvim_ghost_keep_buffers', 0)
 let g:nvim_ghost_logging_enabled  = get(g:,'nvim_ghost_logging_enabled', 0)
 let g:nvim_ghost_server_port      = get(g:,'nvim_ghost_server_port', get(environ(),'GHOSTTEXT_SERVER_PORT', 4001))
 

scripts/install_binary.ps1

@@ -11,7 +11,7 @@ Remove-Item -ErrorAction:Ignore "$binary.version"
 
 if (Test-Path "$binary") {
   Write-Output "Binary still running"
-  Write-Output "Please run ':call nvim_ghost#helper#kill_server()' in neovim"
+  Write-Output "Please run ':call nvim_ghost#server#kill_server()' in neovim"
   while (Test-Path "$binary") {
     try { Remove-Item -ErrorAction:Stop "$binary" }
     catch { Start-Sleep -Seconds 1 }