[hj] fix vertical window resizing bug

Author: hjetmundsen

lua/rovo-dev/terminal.lua

@@ -151,8 +151,9 @@ end
 --- Configure common window options
 --- @param win_id number Window ID to configure
 --- @param config table Plugin configuration
+--- @param is_vertical boolean|nil Whether this is a vertical split (optional)
 --- @private
-local function configure_window_options(win_id, config)
+local function configure_window_options(win_id, config, is_vertical)
   if config.window.hide_numbers then
     vim.api.nvim_set_option_value('number', false, { win = win_id })
     vim.api.nvim_set_option_value('relativenumber', false, { win = win_id })
@@ -161,6 +162,13 @@ local function configure_window_options(win_id, config)
   if config.window.hide_signcolumn then
     vim.api.nvim_set_option_value('signcolumn', 'no', { win = win_id })
   end
+
+  -- Fix window size to prevent automatic resizing when other windows are closed/opened
+  if is_vertical then
+    vim.api.nvim_set_option_value('winfixwidth', true, { win = win_id })
+  else
+    vim.api.nvim_set_option_value('winfixheight', true, { win = win_id })
+  end
 end
 
 --- Generate buffer name for instance
@@ -210,6 +218,10 @@ local function create_split(position, config, existing_bufnr)
   else
     vim.cmd('resize ' .. math.floor(vim.o.lines * config.window.split_ratio))
   end
+
+  -- Configure window options including fixed size for splits
+  local current_win = vim.api.nvim_get_current_win()
+  configure_window_options(current_win, config, is_vertical)
 end
 
 --- Set up function to force insert mode when entering the Rovo Dev window
@@ -341,8 +353,8 @@ local function create_new_instance(rovo_dev, config, git, instance_id)
     local buffer_name = generate_buffer_name(instance_id, config)
     vim.api.nvim_buf_set_name(new_bufnr, buffer_name)
 
-    -- Configure window options
-    configure_window_options(win_id, config)
+    -- Configure window options (floating windows don't need fixed size)
+    configure_window_options(win_id, config, false)
 
     -- Store buffer number for this instance
     rovo_dev.rovo_dev.instances[instance_id] = new_bufnr
@@ -368,7 +380,9 @@ local function create_new_instance(rovo_dev, config, git, instance_id)
 
     -- Configure window options using helper function
     local current_win = vim.api.nvim_get_current_win()
-    configure_window_options(current_win, config)
+    local is_vertical = config.window.position:match('vsplit')
+      or config.window.position:match('vertical')
+    configure_window_options(current_win, config, is_vertical)
 
     -- Store buffer number for this instance
     rovo_dev.rovo_dev.instances[instance_id] = vim.fn.bufnr('%')