Feat: Adapt winbar string to window width

lua/gitlab/actions/discussions/winbar.lua

@@ -143,6 +143,60 @@ local add_drafts_and_resolvable = function(
   return base_title
 end
 
+-- Returns true if the input string (after removing highlighting strings) is wider than the
+-- discussion split.
+---@return boolean
+local too_long = function(str)
+  local d = require("gitlab.actions.discussions")
+  return #str:gsub("%%#[^#]+#", "") > vim.fn.winwidth(d.split.winid)
+end
+
+-- Returns the input winbar string shortened to fit into the windo width.
+---@return string
+local adapt_to_winwidth = function(str)
+  if too_long(str) then
+    str = str:gsub("Inline ", "")
+  end
+  if too_long(str) then
+    str = str:gsub(" Mode", "")
+  end
+  if too_long(str) then
+    str = str:gsub("Help", "H")
+  end
+  if too_long(str) then
+    str = str:gsub("just now", "now")
+    str = str:gsub("(%d+) minutes?", "%1m")
+    str = str:gsub("(%d+) hours?", "%1h")
+    str = str:gsub("(%d+) days?", "%1d")
+  end
+  if too_long(str) then
+    str = str:gsub("Updated", "U")
+  end
+  if too_long(str) then
+    str = str:gsub("Draft", "D")
+    str = str:gsub("Live", "L")
+  end
+  if too_long(str) then
+    str = str:gsub("(%d+) comments?", "%1c")
+  end
+  if too_long(str) then
+    str = str:gsub("(%d+/%d+) threads?", "%1t")
+  end
+  if too_long(str) then
+    str = str:gsub("(%d+) drafts?", "%1d")
+  end
+  if too_long(str) then
+    str = str:gsub("(%d+%a) ago", "%1")
+  end
+  if too_long(str) then
+    str = str:gsub("Comments", "C")
+  end
+  if too_long(str) then
+    str = str:gsub("Notes", "N")
+  end
+  return str
+end
+
 ---@param t WinbarTable
 M.make_winbar = function(t)
   local discussion_title = add_drafts_and_resolvable(
@@ -175,7 +229,7 @@ M.make_winbar = function(t)
   local separator = "%#Comment#|"
   local end_section = "%="
   local help = "%#Comment#Help: " .. (t.help_keymap and t.help_keymap:gsub(" ", "<space>") .. " " or "unmapped")
-  return string.format(
+  local result = string.format(
     " %s %s %s %s %s %s %s",
     discussion_title,
     separator,
@@ -185,6 +239,7 @@ M.make_winbar = function(t)
     separator,
     help
   )
+  return adapt_to_winwidth(result)
 end
 
 ---Returns a string for the winbar indicating the mode type, live or draft