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Don't flash previous buffer when connecting with emacsclient

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* lisp/server.el (server-execute): Accept lambda for creating
frame rather than frame.  Ensure newly created tty frame
initially shows the correct buffer.
(server-process-filter): Pass a lambda to server-execute to create
a frame.  (Bug#24218)
This commit is contained in:
Aaron Jensen 2018-02-16 17:43:04 +02:00 committed by Eli Zaretskii
parent aead21d83e
commit 49fc040077
1 changed files with 49 additions and 39 deletions
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88
lisp/server.el
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@ -1092,7 +1092,8 @@ The following commands are accepted by the client:
tty-type ; string.
files
filepos
args-left)
args-left
create-frame-func)
;; Remove this line from STRING.
(setq string (substring string (match-end 0)))
(setq args-left
@ -1244,28 +1245,29 @@ The following commands are accepted by the client:
(or files commands)
(setq use-current-frame t))
(setq frame
(cond
((and use-current-frame
(or (eq use-current-frame 'always)
;; We can't use the Emacs daemon's
;; terminal frame.
(not (and (daemonp)
(null (cdr (frame-list)))
(eq (selected-frame)
terminal-frame)))))
(setq tty-name nil tty-type nil)
(if display (server-select-display display)))
((or (and (eq system-type 'windows-nt)
(daemonp)
(setq display "w32"))
(eq tty-name 'window-system))
(server-create-window-system-frame display nowait proc
parent-id
frame-parameters))
;; When resuming on a tty, tty-name is nil.
(tty-name
(server-create-tty-frame tty-name tty-type proc))))
(setq create-frame-func
(lambda ()
(cond
((and use-current-frame
(or (eq use-current-frame 'always)
;; We can't use the Emacs daemon's
;; terminal frame.
(not (and (daemonp)
(null (cdr (frame-list)))
(eq (selected-frame)
terminal-frame)))))
(setq tty-name nil tty-type nil)
(if display (server-select-display display)))
((or (and (eq system-type 'windows-nt)
(daemonp)
(setq display "w32"))
(eq tty-name 'window-system))
(server-create-window-system-frame display nowait proc
parent-id
frame-parameters))
;; When resuming on a tty, tty-name is nil.
(tty-name
(server-create-tty-frame tty-name tty-type proc)))))
(process-put
proc 'continuation
@ -1277,7 +1279,7 @@ The following commands are accepted by the client:
(if (and dir (file-directory-p dir))
dir default-directory)))
(server-execute proc files nowait commands
dontkill frame tty-name)))))
dontkill create-frame-func tty-name)))))
(when (or frame files)
(server-goto-toplevel proc))
@ -1286,7 +1288,7 @@ The following commands are accepted by the client:
;; condition-case
(error (server-return-error proc err))))
(defun server-execute (proc files nowait commands dontkill frame tty-name)
(defun server-execute (proc files nowait commands dontkill create-frame-func tty-name)
;; This is run from timers and process-filters, i.e. "asynchronously".
;; But w.r.t the user, this is not really asynchronous since the timer
;; is run after 0s and the process-filter is run in response to the
@ -1296,21 +1298,29 @@ The following commands are accepted by the client:
;; including code that needs to wait.
(with-local-quit
(condition-case err
(let ((buffers (server-visit-files files proc nowait)))
(mapc 'funcall (nreverse commands))
(let* ((buffers (server-visit-files files proc nowait))
;; If we were told only to open a new client, obey
;; `initial-buffer-choice' if it specifies a file
;; or a function.
(initial-buffer (unless (or files commands)
(let ((buf
(cond ((stringp initial-buffer-choice)
(find-file-noselect initial-buffer-choice))
((functionp initial-buffer-choice)
(funcall initial-buffer-choice)))))
(if (buffer-live-p buf) buf (get-buffer-create "*scratch*")))))
;; Set current buffer so that newly created tty frames
;; show the correct buffer initially.
(frame (with-current-buffer (or (car buffers)
initial-buffer
(current-buffer))
(prog1
(funcall create-frame-func)
;; Switch to initial buffer in case the frame was reused.
(when initial-buffer
(switch-to-buffer initial-buffer 'norecord))))))
;; If we were told only to open a new client, obey
;; `initial-buffer-choice' if it specifies a file
;; or a function.
(unless (or files commands)
(let ((buf
(cond ((stringp initial-buffer-choice)
(find-file-noselect initial-buffer-choice))
((functionp initial-buffer-choice)
(funcall initial-buffer-choice)))))
(switch-to-buffer
(if (buffer-live-p buf) buf (get-buffer-create "*scratch*"))
'norecord)))
(mapc 'funcall (nreverse commands))
;; Delete the client if necessary.
(cond