Variable: tab-bar-history-mode-hook

tab-bar-history-mode-hook is a customizable variable defined in tab-bar.el.gz.

Value

nil

Documentation

Hook run after entering or leaving tab-bar-history-mode(var)/tab-bar-history-mode(fun).

No problems result if this variable is not bound. add-hook automatically binds it. (This is true for all hook variables.)

Source Code

;; Defined in /usr/src/emacs/lisp/tab-bar.el.gz
(define-minor-mode tab-bar-history-mode
  "Toggle tab history mode for the tab bar.
Tab history mode remembers window configurations used in every tab,
and can restore them."
  :global t :group 'tab-bar
  (if tab-bar-history-mode
      (progn
        (require 'icons)

        (unless (iconp 'tab-bar-back)
          (define-icon tab-bar-back nil
            `((image "symbols/chevron_left_16.svg" "tabs/left-arrow.xpm"
                     :height (1 . em)
                     :margin ,tab-bar-button-margin
                     :ascent center)
              (text " < "))
            "Icon for going back in tab history."
            :version "29.1"))
        (setq tab-bar-back-button (icon-string 'tab-bar-back))

        (unless (iconp 'tab-bar-forward)
          (define-icon tab-bar-forward nil
            `((image "symbols/chevron_right_16.svg" "tabs/right-arrow.xpm"
                     :height (1 . em)
                     :margin ,tab-bar-button-margin
                     :ascent center)
              (text " > "))
            "Icon for going forward in tab history."
            :version "29.1"))
        (setq tab-bar-forward-button (icon-string 'tab-bar-forward))

        (add-hook 'pre-command-hook #'tab-bar--history-pre-change)
        (add-hook 'window-configuration-change-hook #'tab-bar--history-change))
    (remove-hook 'pre-command-hook #'tab-bar--history-pre-change)
    (remove-hook 'window-configuration-change-hook #'tab-bar--history-change)))