fix(cmdline): truncate window title using final width

Author: echasnovski

lua/mini/cmdline.lua

@@ -1006,13 +1006,13 @@ H.peek_get_config = function(height)
   if vim.is_callable(win_config) then win_config = win_config() end
   local config = vim.tbl_deep_extend('force', default_config, win_config or {})
 
-  if type(config.title) == 'string' then config.title = H.fit_to_width(config.title, config.width) end
-
   -- Tweak config values to ensure they are proper, accounting for border
   local offset = config.border == 'none' and 0 or 2
   config.height = math.max(math.min(config.height, vim.o.lines - cmdheight - offset), 1)
   config.width = math.min(config.width, vim.o.columns - offset)
 
+  if type(config.title) == 'string' then config.title = H.fit_to_width(config.title, config.width) end
+
   return config
 end
 

tests/screenshots/tests-test_cmdline.lua---Autopeek---respects-`config.autopeek.window.config`-003

@@ -0,0 +1,25 @@
+--|---------|---------|
+01|My tabline          
+02|Line 1              
+03|Line 2              
+04|Line 3              
+05|Line 4              
+06|┌…jklmnopqrstuvwxyz┐
+07|│  │Line 1         │
+08|│🭬2│Line 2         │
+09|│  │Line 3         │
+10|└──────────────────┘
+11|:2                  
+
+--|---------|---------|
+01|00000000000000000000
+02|11111111111111111111
+03|11111111111111111111
+04|11111111111111111111
+05|11111111111111111111
+06|23333333333333333332
+07|24456666666666666662
+08|27456666666666666662
+09|24456666666666666662
+10|22222222222222222222
+11|88888888888888888888

tests/test_cmdline.lua

@@ -1421,6 +1421,14 @@ T['Autopeek']['respects `config.autopeek.window.config`'] = function()
     return { border = 'double', width = 0.25 * vim.o.columns, height = 5, title = 'Custom title to check truncation' }
   end]])
   expect_screenshot_after_keys({ ':', '2' })
+  type_keys('<Esc>')
+
+  -- Should properly truncate title
+  child.lua([[
+    local title = string.sub('abcdefgijklmnopqrstuvwxyz', -vim.o.columns)
+    MiniCmdline.config.autopeek.window.config = { width = vim.o.columns, title = title }
+  ]])
+  expect_screenshot_after_keys({ ':', '2' })
 end
 
 T['Autopeek']["respects 'winborder'"] = function()