fix(mappings): fallback for focus_preview (#1738)

Author: pynappo

lua/neo-tree/sources/common/commands.lua

@@ -681,8 +681,14 @@ M.scroll_preview = function(state)
   Preview.scroll(state)
 end
 
-M.focus_preview = function()
-  Preview.focus()
+M.focus_preview = function(state)
+  if Preview.is_active() then
+    Preview.focus()
+  else
+    vim.api.nvim_win_call(state.winid, function()
+      vim.api.nvim_feedkeys(state.fallback, "n", false)
+    end)
+  end
 end
 
 ---Expands or collapses the current node.

lua/neo-tree/sources/common/preview.lua

@@ -506,8 +506,8 @@ Preview.scroll = function(state)
       vim.cmd(("normal! %s%s"):format(count, input))
     end)
   else
-    vim.api.nvim_buf_call(state.bufnr, function()
-      vim.cmd(("normal! %s"):format(utils.keycode(state.fallback)))
+    vim.api.nvim_win_call(state.winid, function()
+      vim.api.nvim_feedkeys(state.fallback, "n", false)
     end)
   end
 end

lua/neo-tree/ui/renderer.lua

@@ -850,9 +850,10 @@ local set_buffer_mappings = function(state)
           resolved_mappings[cmd] = { text = desc or "<function>" }
         end
         if type(func) == "function" then
+          local fallback = utils.keycode(cmd)
           resolved_mappings[cmd].handler = function()
             state.config = config
-            state.fallback = cmd
+            state.fallback = fallback
             return func(state)
           end
           keymap.set(state.bufnr, "n", cmd, resolved_mappings[cmd].handler, map_options)