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wezterm/.config/events/format-tab-title.lua

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+---@module "events.format-tab-title"
+---@author sravioli
+---@license GNU-GPLv3
+
+---@diagnostic disable: undefined-field
+
+local wt = require "wezterm"
+
+local Utils = require "utils"
+local str = Utils.fn.str
+local Icon = Utils.class.icon
+local tabicons = Icon.Sep.tb
+
+wt.on("format-tab-title", function(tab, _, _, config, hover, max_width)
+  if config.use_fancy_tab_bar or not config.enable_tab_bar then
+    return
+  end
+
+  local theme = config.color_schemes[config.color_scheme]
+  local bg = theme.tab_bar.background
+  local fg
+
+  local Title = Utils.class.layout:new "TabTitle"
+
+  local tab_idx = tab.tab_index
+  local attributes = {}
+
+  ---set colors based on states
+  if tab.is_active then
+    fg = theme.ansi[5]
+    attributes = { "Bold" }
+  elseif hover then
+    fg = theme.tab_bar.inactive_tab_hover.bg_color
+  else
+    fg = theme.brights[1]
+  end
+
+  ---Check if any pane has unseen output
+  local unseen_output = false
+  for _, p in ipairs(tab.panes) do
+    if p.has_unseen_output then
+      unseen_output = true
+      break
+    end
+  end
+
+  local pane = tab.active_pane
+  local tab_title = (tab.tab_title and #tab.tab_title > 0) and tab.tab_title or pane.title
+  local title = str.format_tab_title(pane, tab_title, config, max_width)
+
+  ---add the either the leftmost element or the normal left separator. This is done to
+  ---esure a bit of space from the left margin.
+  Title:append(bg, fg, tab_idx == 0 and tabicons.leftmost or tabicons.left, attributes)
+
+  ---add the tab number. can be substituted by the `has_unseen_output` notification
+  Title:append(
+    fg,
+    bg,
+    (unseen_output and Icon.Notification or Icon.Nums[tab_idx + 1] or "") .. " ",
+    attributes
+  )
+
+  ---the formatted tab title
+  Title:append(fg, bg, title, attributes)
+
+  ---the right tab bar separator
+  Title:append(bg, fg, Icon.Sep.block .. tabicons.right, attributes)
+
+  return Title
+end)