fix: response buffer fold issue

- don't set `buftype=nofile`. it breaks with `nvim-ufo`
- set `modifiable` to `false` by default in pane UI
- prevent `:Rest run` run on non-http files

Author: boltlessengineer

lua/rest-nvim/commands.lua

@@ -47,6 +47,10 @@ local ui = require("rest-nvim.ui.result")
 local rest_command_tbl = {
   run = {
     impl = function(args, _opts)
+      if vim.bo.filetype ~= "http" or vim.b.__rest_no_http_file then
+        vim.notify("`:Rest run` can be only called from http file", vim.log.levels.ERROR)
+        return
+      end
       if #args > 1 then
         vim.notify("Running multiple request isn't supported yet", vim.log.levels.WARN)
         return

lua/rest-nvim/ui/panes.lua

@@ -72,10 +72,8 @@ function M.create_pane_group(name, pane_opts, opts)
           -- unless lazy-setting winbar won't work
           vim.fn.bufload(self.bufnr)
           vim.bo[self.bufnr].swapfile = false
-          vim.bo[self.bufnr].buftype = "nofile"
           vim.b[self.bufnr].__pane_group = name
-          -- HACK: I can't set buffer name because it will allow `:edit` command
-          -- vim.api.nvim_buf_set_name(self.bufnr, name .. "#" .. self.name)
+          vim.api.nvim_buf_set_name(self.bufnr, name .. "#" .. self.name)
           if opts and opts.on_init then
             opts.on_init(self)
           end
@@ -91,6 +89,7 @@ function M.create_pane_group(name, pane_opts, opts)
           vim.bo[self.bufnr].undolevels = vim.o.undolevels
         end
         vim.bo[self.bufnr].modifiable = modifiable
+        vim.bo[self.bufnr].modified = false
       end
     }
     table.insert(group.panes, pane)

lua/rest-nvim/ui/result.lua

@@ -54,6 +54,7 @@ local panes = {
       -- HACK: `vim.treesitter.foldexpr()` finds fold based on filetype not registered parser of
       -- current buffer
       vim.bo[self.bufnr].filetype = "http"
+      vim.b[self.bufnr].__rest_no_http_file = true
       -- syntax_highlight(self.bufnr, "http")
       local lines = render_request(data.request)
       if data.response then
@@ -169,14 +170,6 @@ local group = paneui.create_pane_group("rest_nvim_result", panes, {
     vim.keymap.set("n", "?", help.open, { buffer = self.bufnr })
     vim.bo[self.bufnr].filetype = "rest_nvim_result"
     utils.nvim_lazy_set_wo(self.bufnr, "winbar", winbar)
-    -- HACK: hack to enable fold inside buftype=nofile
-    vim.api.nvim_create_autocmd("WinEnter", {
-      buffer = self.bufnr,
-      callback = function ()
-        vim.api.nvim_set_option_value("foldmethod", "expr", { scope = "local" })
-      end,
-      once = true,
-    })
   end,
 })