Commit 150f39ee authored by Lars Hansen's avatar Lars Hansen

(desktop-restore-eager, desktop-lazy-verbose, desktop-lazy-idle-delay):

New customizable variables.
(desktop-buffer-args-list): New variable.
(desktop-append-buffer-args): New function.
(desktop-save): Call desktop-append-buffer-args for some buffers.
(desktop-lazy-create-buffer): New function.
(desktop-idle-create-buffers): New function.
(desktop-read): Add message about buffers to restore lazily.
(desktop-lazy-abort): New command.
(desktop-clear): Call desktop-lazy-abort.
(desktop-lazy-complete): New command.
parent ff59904a
......@@ -198,7 +198,7 @@ Feature: Saving `kill-ring' implies saving `kill-ring-yank-pointer'."
"List of global variables to clear by `desktop-clear'.
"List of global variables that `desktop-clear' will clear.
An element may be variable name (a symbol) or a cons cell of the form
\(VAR . FORM). Symbols are set to nil and for cons cells VAR is set
to the value obtained by evaluateing FORM."
......@@ -267,6 +267,27 @@ Possible values are:
:group 'desktop
:version "21.4")
(defcustom desktop-restore-eager t
"Number of buffers to restore immediately.
Remaining buffers are restored lazily (when Emacs is idle).
If value is t, all buffers are restored immediately."
:type '(choise (const t) integer)
:group 'desktop
:version "21.4")
(defcustom desktop-lazy-verbose t
"Verbose reporting of lazily created buffers."
:type 'boolean
:group 'desktop
:version "21.4")
(defcustom desktop-lazy-idle-delay 5
"Idle delay before starting to create buffers.
See `desktop-restore-eager'."
:type 'integer
:group 'desktop
:version "21.4")
(defvar desktop-save-buffer nil
"When non-nil, save buffer status in desktop file.
......@@ -365,6 +386,7 @@ This kills all buffers except for internal ones and those matching
`desktop-clear-preserve-buffers'. Furthermore, it clears the
variables listed in `desktop-globals-to-clear'."
(dolist (var desktop-globals-to-clear)
(if (symbolp var)
(eval `(setq-default ,var nil))
......@@ -625,6 +647,7 @@ See also `desktop-base-file-name'."
(setq locals (cdr locals)))
(eager desktop-restore-eager)
(buf (get-buffer-create "*desktop*")))
(set-buffer buf)
......@@ -645,14 +668,21 @@ See also `desktop-base-file-name'."
(insert "\n;; Buffer section -- buffers listed in same order as in buffer list:\n")
(mapc #'(lambda (l)
(if (apply 'desktop-save-buffer-p l)
(insert "(desktop-create-buffer " desktop-file-version)
(mapc #'(lambda (e)
(insert "\n " (desktop-value-to-string e)))
(insert ")\n\n"))))
(when (apply 'desktop-save-buffer-p l)
(insert "("
(if (or (not (integerp eager))
(unless (zerop eager)
(setq eager (1- eager))
" "
(mapc #'(lambda (e)
(insert "\n " (desktop-value-to-string e)))
(insert ")\n\n")))
(setq default-directory dirname)
(when (file-exists-p filename) (delete-file filename))
(let ((coding-system-for-write 'emacs-mule))
......@@ -670,6 +700,11 @@ This function also sets `desktop-dirname' to nil."
(when (file-exists-p filename)
(delete-file filename)))))
(defvar desktop-buffer-args-list nil
"List of args for `desktop-create-buffer'.")
(defvar desktop-lazy-timer nil)
;; ----------------------------------------------------------------------------
(defun desktop-read (&optional dirname)
......@@ -706,6 +741,7 @@ It returns t if a desktop file was loaded, nil otherwise."
(let ((desktop-first-buffer nil)
(desktop-buffer-ok-count 0)
(desktop-buffer-fail-count 0))
(setq desktop-lazy-timer nil)
;; Evaluate desktop buffer.
(load (expand-file-name desktop-base-file-name desktop-dirname) t t t)
;; `desktop-create-buffer' puts buffers at end of the buffer list.
......@@ -717,11 +753,15 @@ It returns t if a desktop file was loaded, nil otherwise."
(run-hooks 'desktop-delay-hook)
(setq desktop-delay-hook nil)
(run-hooks 'desktop-after-read-hook)
(message "Desktop: %d buffer%s restored%s."
(message "Desktop: %d buffer%s restored%s%s."
(if (= 1 desktop-buffer-ok-count) "" "s")
(if (< 0 desktop-buffer-fail-count)
(format ", %d failed to restore" desktop-buffer-fail-count)
(if desktop-buffer-args-list
(format ", %d to restore lazily"
(length desktop-buffer-args-list))
;; No desktop file found.
......@@ -917,6 +957,69 @@ directory DIRNAME."
(cons 'case-replace cr)
(cons 'overwrite-mode (car mim)))))
(defun desktop-append-buffer-args (&rest args)
"Append ARGS at end of `desktop-buffer-args-list'
ARGS must be an argument list for `desktop-create-buffer'."
(setq desktop-buffer-args-list (nconc desktop-buffer-args-list (list args)))
(unless desktop-lazy-timer
(setq desktop-lazy-timer
(run-with-idle-timer desktop-lazy-idle-delay t 'desktop-idle-create-buffers))))
(defun desktop-lazy-create-buffer ()
"Pop args from `desktop-buffer-args-list', create buffer and bury it."
(when desktop-buffer-args-list
(let* ((remaining (length desktop-buffer-args-list))
(args (pop desktop-buffer-args-list))
(buffer-name (nth 2 args))
(msg (format "Desktop lazily opening %s (%s remaining)..."
buffer-name remaining)))
(when desktop-lazy-verbose
(message msg))
(let ((desktop-first-buffer nil)
(desktop-buffer-ok-count 0)
(desktop-buffer-fail-count 0))
(apply 'desktop-create-buffer args)
(run-hooks 'desktop-delay-hook)
(setq desktop-delay-hook nil)
(bury-buffer (get-buffer buffer-name))
(when desktop-lazy-verbose
(message "%s%s" msg (if (> desktop-buffer-ok-count 0) "done" "failed")))))))
(defun desktop-idle-create-buffers ()
"Create buffers until the user does something, then stop.
If there are no buffers left to create, kill the timer."
(let ((repeat 1))
(while (and repeat desktop-buffer-args-list)
(setq repeat (sit-for 0.2))
(unless desktop-buffer-args-list
(cancel-timer desktop-lazy-timer)
(setq desktop-lazy-timer nil)
(message "Lazy desktop load complete")
(sit-for 3)
(message "")))))
(defun desktop-lazy-complete ()
"Run the desktop load to completion."
(let ((desktop-lazy-verbose t))
(while desktop-buffer-args-list
(message "Lazy desktop load complete")))
(defun desktop-lazy-abort ()
"Abort lazy loading of the desktop."
(when desktop-lazy-timer
(cancel-timer desktop-lazy-timer)
(setq desktop-lazy-timer nil))
(when desktop-buffer-args-list
(setq desktop-buffer-args-list nil)
(when (interactive-p)
(message "Lazy desktop load aborted"))))
;; ----------------------------------------------------------------------------
;; When `desktop-save-mode' is non-nil and "--no-desktop" is not specified on the
;; command line, we do the rest of what it takes to use desktop, but do it
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