From e2f96a80b823fd4565939e104e6f014fea87f583 Mon Sep 17 00:00:00 2001
From: JSDurand <mmemmew@gmail.com>
Date: Sat, 29 Jul 2023 23:44:42 +0800
Subject: modeline: `mode-line-window-selected-p`

* modeline.el: (modeline-get-active-window, modeline-active-window,
modeline-active-window-p, modeline-set-active-window,
modeline-unset-active-window, modeline-refresh-modeline,
window-configuration-change-hook, buffer-list-update-hook,
after-make-frame-functions, delete-frame-functions,
handle-switch-frame): Emacs 29 adds a convenient function
`mode-line-window-selected-p` that makes my old manual implementation
here obsolete now.
---
 modeline.el | 99 ++++++++++++++++++++++++++++++++-----------------------------
 1 file changed, 52 insertions(+), 47 deletions(-)

diff --git a/modeline.el b/modeline.el
index a505733..52ae9af 100644
--- a/modeline.el
+++ b/modeline.el
@@ -169,53 +169,58 @@ MAP is the local keymap of the text."
 ;; NOTE: I tried to avoid this, but it turns out that this is the most
 ;; reliable way to do so.
 
-;;;###autoload
-(defun modeline-get-active-window (&optional frame)
-  "The active window excluding the child windows."
-  (cond
-   ((and (fboundp #'frame-parent) (frame-parent frame))
-    (frame-selected-window (frame-parent frame)))
-   ((frame-selected-window frame))))
-
-;;;###autoload
-(defvar modeline-active-window (modeline-get-active-window)
-  "The active window excluding the child windows.")
-
-;;;###autoload
-(defun modeline-active-window-p ()
-  "Whether we are in the active window."
-  (and modeline-active-window
-       (eq modeline-active-window (selected-window))))
-
-;;;###autoload
-(defun modeline-set-active-window (&rest _)
-  "Update `modeline-active-window'."
-  (let ((active-wn (modeline-get-active-window)))
-    (cond
-     ((minibuffer-window-active-p active-wn))
-     (t (setq modeline-active-window active-wn))))
-  (force-mode-line-update t))
-
-;;;###autoload
-(defsubst modeline-unset-active-window (&rest _)
-  "Set `modeline-active-window' to `nil'."
-  (setq modeline-active-window nil))
-
-;;;###autoload
-(defun modeline-refresh-modeline ()
-  "Refresh the focus state of the mode line."
-  (setq modeline-active-window nil)
-  (mapc (lambda (frame)
-          (cond ((eq (frame-focus-state frame) t)
-                 (setq modeline-active-window (modeline-get-active-window frame)))))
-        (frame-list)))
-
-(add-hook 'window-configuration-change-hook #'modeline-set-active-window)
-(add-hook 'buffer-list-update-hook #'modeline-set-active-window)
-(add-hook 'after-make-frame-functions #'modeline-set-active-window)
-(add-hook 'delete-frame-functions #'modeline-set-active-window)
-(advice-add #'handle-switch-frame :after #'modeline-set-active-window)
-(add-function :after after-focus-change-function #'modeline-refresh-modeline)
+;; NOTE: Emacs-29 adds the function `mode-line-window-selected-p'
+;; which does what I manually implemented here.
+
+;; ;;;###autoload
+;; (defun modeline-get-active-window (&optional frame)
+;;   "The active window excluding the child windows."
+;;   (cond
+;;    ((and (fboundp #'frame-parent) (frame-parent frame))
+;;     (frame-selected-window (frame-parent frame)))
+;;    ((frame-selected-window frame))))
+
+;; ;;;###autoload
+;; (defvar modeline-active-window (modeline-get-active-window)
+;;   "The active window excluding the child windows.")
+
+(defalias #'modeline-active-window-p #'mode-line-window-selected-p)
+
+;; ;;;###autoload
+;; (defun modeline-active-window-p ()
+;;   "Whether we are in the active window."
+;;   (and modeline-active-window
+;;        (eq modeline-active-window (selected-window))))
+
+;; ;;;###autoload
+;; (defun modeline-set-active-window (&rest _)
+;;   "Update `modeline-active-window'."
+;;   (let ((active-wn (modeline-get-active-window)))
+;;     (cond
+;;      ((minibuffer-window-active-p active-wn))
+;;      (t (setq modeline-active-window active-wn))))
+;;   (force-mode-line-update t))
+
+;; ;;;###autoload
+;; (defsubst modeline-unset-active-window (&rest _)
+;;   "Set `modeline-active-window' to `nil'."
+;;   (setq modeline-active-window nil))
+
+;; ;;;###autoload
+;; (defun modeline-refresh-modeline ()
+;;   "Refresh the focus state of the mode line."
+;;   (setq modeline-active-window nil)
+;;   (mapc (lambda (frame)
+;;           (cond ((eq (frame-focus-state frame) t)
+;;                  (setq modeline-active-window (modeline-get-active-window frame)))))
+;;         (frame-list)))
+
+;; (add-hook 'window-configuration-change-hook #'modeline-set-active-window)
+;; (add-hook 'buffer-list-update-hook #'modeline-set-active-window)
+;; (add-hook 'after-make-frame-functions #'modeline-set-active-window)
+;; (add-hook 'delete-frame-functions #'modeline-set-active-window)
+;; (advice-add #'handle-switch-frame :after #'modeline-set-active-window)
+;; (add-function :after after-focus-change-function #'modeline-refresh-modeline)
 
 ;;; Faces
 
-- 
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