diff --git a/lisp/window.el b/lisp/window.el index 2634955a75..bc07300f0c 100644 --- a/lisp/window.el +++ b/lisp/window.el @@ -7779,6 +7779,16 @@ switch-to-buffer-in-dedicated-window :group 'windows :version "25.1") +(defcustom switch-to-buffer-obey-display-actions nil + "If non-nil, have `switch-to-buffer' run `pop-to-buffer-same-window'. +This means that when switching the buffer it respects display actions +specified by `display-buffer-overriding-action', `display-buffer-alist' +and other display related variables. So `switch-to-buffer' will display +the buffer in the window specified by the rules from these variables." + :type 'boolean + :group 'windows + :version "27.1") + (defun switch-to-buffer (buffer-or-name &optional norecord force-same-window) "Display buffer BUFFER-OR-NAME in the selected window. @@ -7811,38 +7821,53 @@ switch-to-buffer If optional argument FORCE-SAME-WINDOW is non-nil, the buffer must be displayed in the selected window when called non-interactively; if that is impossible, signal an error rather -than calling `pop-to-buffer'. +than calling `pop-to-buffer'. It has no effect when the option +`switch-to-buffer-obey-display-actions' is non-nil. The option `switch-to-buffer-preserve-window-point' can be used to make the buffer appear at its last position in the selected window. +If the option `switch-to-buffer-obey-display-actions' is non-nil, +run the function `pop-to-buffer-same-window' instead. +This may display the buffer in another window as specified by +`display-buffer-overriding-action', `display-buffer-alist' and +other display related variables. If this results in displaying +the buffer in the selected window, window start and point are adjusted +as prescribed by the option `switch-to-buffer-preserve-window-point'. +Otherwise, these are left alone. + Return the buffer switched to." (interactive (let ((force-same-window - (cond - ((window-minibuffer-p) nil) - ((not (eq (window-dedicated-p) t)) 'force-same-window) - ((pcase switch-to-buffer-in-dedicated-window - ('nil (user-error - "Cannot switch buffers in a dedicated window")) - ('prompt - (if (y-or-n-p - (format "Window is dedicated to %s; undedicate it" - (window-buffer))) - (progn - (set-window-dedicated-p nil nil) - 'force-same-window) - (user-error - "Cannot switch buffers in a dedicated window"))) - ('pop nil) - (_ (set-window-dedicated-p nil nil) 'force-same-window)))))) + (unless switch-to-buffer-obey-display-actions + (cond + ((window-minibuffer-p) nil) + ((not (eq (window-dedicated-p) t)) 'force-same-window) + ((pcase switch-to-buffer-in-dedicated-window + ('nil (user-error + "Cannot switch buffers in a dedicated window")) + ('prompt + (if (y-or-n-p + (format "Window is dedicated to %s; undedicate it" + (window-buffer))) + (progn + (set-window-dedicated-p nil nil) + 'force-same-window) + (user-error + "Cannot switch buffers in a dedicated window"))) + ('pop nil) + (_ (set-window-dedicated-p nil nil) 'force-same-window))))))) (list (read-buffer-to-switch "Switch to buffer: ") nil force-same-window))) - (let ((buffer (window-normalize-buffer-to-switch-to buffer-or-name))) + (let ((buffer (window-normalize-buffer-to-switch-to buffer-or-name)) + (set-window-start-and-point (not switch-to-buffer-obey-display-actions))) (cond ;; Don't call set-window-buffer if it's not needed since it ;; might signal an error (e.g. if the window is dedicated). - ((eq buffer (window-buffer))) + ((and (eq buffer (window-buffer)) + ;; pop-to-buffer-same-window might decide to display + ;; the same buffer in another window + (not switch-to-buffer-obey-display-actions))) ((window-minibuffer-p) (if force-same-window (user-error "Cannot switch buffers in minibuffer window") @@ -7852,18 +7877,25 @@ switch-to-buffer (user-error "Cannot switch buffers in a dedicated window") (pop-to-buffer buffer norecord))) (t - (let* ((entry (assq buffer (window-prev-buffers))) - (displayed (and (eq switch-to-buffer-preserve-window-point - 'already-displayed) - (get-buffer-window buffer 0)))) - (set-window-buffer nil buffer) - (when (and entry - (or (eq switch-to-buffer-preserve-window-point t) - displayed)) - ;; Try to restore start and point of buffer in the selected - ;; window (Bug#4041). - (set-window-start (selected-window) (nth 1 entry) t) - (set-window-point nil (nth 2 entry)))))) + (when switch-to-buffer-obey-display-actions + (let ((selected-window (selected-window))) + (pop-to-buffer-same-window buffer norecord) + (when (eq (selected-window) selected-window) + (setq set-window-start-and-point t)))) + + (when set-window-start-and-point + (let* ((entry (assq buffer (window-prev-buffers))) + (displayed (and (eq switch-to-buffer-preserve-window-point + 'already-displayed) + (get-buffer-window buffer 0)))) + (set-window-buffer nil buffer) + (when (and entry + (or (eq switch-to-buffer-preserve-window-point t) + displayed)) + ;; Try to restore start and point of buffer in the selected + ;; window (Bug#4041). + (set-window-start (selected-window) (nth 1 entry) t) + (set-window-point nil (nth 2 entry))))))) (unless norecord (select-window (selected-window)))