feat(log): add focus option for log window

Added a new configuration option `focus_on_open` to control whether the
log window should be focused when opened. Updated the default
`open_cmd` to `botright 30vnew` because this is default option.
Modified the `open_win` function to switch back to the previous window
if `focus_on_open` is set to false.

README.md

@@ -253,7 +253,8 @@ require("flutter-tools").setup {
     -- takes a log_line as string argument; returns a boolean or nil;
     -- the log_line is only added to the output if the function returns true
     notify_errors = false, -- if there is an error whilst running then notify the user
-    open_cmd = "tabedit", -- command to use to open the log buffer
+    open_cmd = "botright 30vnew", -- command to use to open the log buffer
+    focus_on_open = true, -- focus on the newly opened log window
   },
   dev_tools = {
     autostart = false, -- autostart devtools server if not detected

doc/flutter-tools.txt

@@ -289,7 +289,8 @@ both are set.
         -- takes a log_line as string argument; returns a boolean or nil;
         -- the log_line is only added to the output if the function returns true
         notify_errors = false, -- if there is an error whilst running then notify the user
-        open_cmd = "tabedit", -- command to use to open the log buffer
+        open_cmd = "botright 30vnew", -- command to use to open the log buffer
+        focus_on_open = true, -- focus on the newly opened log window
       },
       dev_tools = {
         autostart = false, -- autostart devtools server if not detected

lua/flutter-tools/config.lua

@@ -113,6 +113,7 @@ local config = {
     filter = nil,
     enabled = true,
     notify_errors = false,
+    focus_on_open = true,
   }, {
     __index = function(_, k) return k == "open_cmd" and get_split_cmd(0.4, 50) or nil end,
   }),

lua/flutter-tools/log.lua

@@ -32,6 +32,7 @@ local function create(config)
     filename = M.filename,
     filetype = "log",
     open_cmd = config.open_cmd,
+    focus_on_open = config.focus_on_open,
   }
   ui.open_win(opts, function(buf, win)
     if not buf then

lua/flutter-tools/ui.lua

@@ -144,6 +144,10 @@ function M.open_win(opts, on_open)
   vim.bo[buf].swapfile = false
   vim.bo[buf].buftype = "nofile"
   if on_open then on_open(buf, win) end
+  if not opts.focus_on_open then
+    -- Switch back to the previous window
+    vim.cmd("wincmd p")
+  end
 end
 
 return M