Fix previous volume persist logic

plugin/vimedia.vim

@@ -85,6 +85,8 @@ fu! s:SetPlayerCallback(channel, msg)
  let s:selected_player = player
  endif
  endfor
+
+ call job_start(s:GetVolumeCmd(s:selected_player), {"out_cb": function("s:GetVolumeCallback")})
 endfu
 
 fu! s:GetPositionCallback(channel, msg)
@@ -126,6 +128,10 @@ fu! s:UnmuteCallback(channel, msg)
  call s:SetVolumeAll(a:msg, s:previous_volume)
 endfu
 
+fu! s:GetVolumeCallback(channel, msg)
+ let s:previous_volume = str2float(a:msg)
+endfu
+
 fu! s:ShuffleCallback(channel, msg)
  if a:msg == "false"
  call job_start(s:SetShuffleCmd(s:selected_player, "true"))
@@ -229,8 +235,6 @@ call s:init_player_config()
 let s:interaction_type_select_player = "select_player_interaction"
 let s:interaction_type_toggle_volume = "toggle_volume_interaction"
 
-let s:previous_volume = 1.0
-
 let s:toggle_volume_opt_up = "Louder"
 let s:toggle_volume_opt_down = "Quieter"
 let s:toggle_volume_opt_done = "Done"
@@ -288,17 +292,18 @@ endfu
 
 fu! s:ToggleVolume() abort
  let l:selected_opt = expand("<cword>") 
+
  if l:selected_opt == s:toggle_volume_opt_up
  let l:next_volume = s:previous_volume + 0.1
- let s:previous_volume = l:next_volume
- call job_start(s:SetVolumeCmd(s:selected_player, l:next_volume))
  elseif l:selected_opt == s:toggle_volume_opt_down
  let l:next_volume = s:previous_volume - 0.1
- let s:previous_volume = l:next_volume
- call job_start(s:SetVolumeCmd(s:selected_player, l:next_volume))
  elseif l:selected_opt == s:toggle_volume_opt_done
  close
  endif
+
+ echo l:next_volume
+ let s:previous_volume = l:next_volume
+ call job_start(s:SetVolumeCmd(s:selected_player, l:next_volume))
 endfu
 
 fu! s:AdjustVolume() abort