Commit 4538c058 authored by Juanma Barranquero's avatar Juanma Barranquero
Browse files

lisp/frameset.el: Separate frame reusing from cleaning up.

* lisp/desktop.el (desktop-restore-forces-onscreen)
  (desktop-restore-reuses-frames): Use non-keyword values.
  (desktop-restore-frameset): Use CLEANUP-FRAMES arg of frameset-restore.

* lisp/frameset.el: Separate options for reusing frames and cleaning up.
  (frameset--reuse-list): Remove definition; declare.
  (frameset--action-map): Declare.
  (frameset--find-frame-if): Doc fix.
  (frameset--restore-frame): Cache frame action.
  (frameset-restore): New keyword arg CLEANUP-FRAMES, allows to select
  how to clean up the frame list after restoring.  Remove cleaning
  options from REUSE-FRAMES.  Change all keyword values to symbols.
  (frameset--jump-to-register): Simplify by using CLEANUP-FRAMES.
parent f38145ba
2014-03-11 Juanma Barranquero <lekktu@gmail.com>
* frameset.el: Separate options for reusing frames and cleaning up.
(frameset--reuse-list): Remove definition; declare.
(frameset--action-map): Declare.
(frameset--find-frame-if): Doc fix.
(frameset--restore-frame): Cache frame action.
(frameset-restore): New keyword arg CLEANUP-FRAMES, allows to select
how to clean up the frame list after restoring. Remove cleaning
options from REUSE-FRAMES. Change all keyword values to symbols.
(frameset--jump-to-register): Simplify by using CLEANUP-FRAMES.
* desktop.el (desktop-restore-forces-onscreen)
(desktop-restore-reuses-frames): Use non-keyword values.
(desktop-restore-frameset): Use CLEANUP-FRAMES arg of frameset-restore.
2014-03-10 Glenn Morris <rgm@gnu.org>
* files.el (find-file): Doc fix: update info node name.
......
......@@ -404,12 +404,12 @@ If `delete', frames on other displays are deleted instead of restored."
(defcustom desktop-restore-forces-onscreen t
"If t, offscreen frames are restored onscreen instead.
If `:all', frames that are partially offscreen are also forced onscreen.
If `all', frames that are partially offscreen are also forced onscreen.
NOTE: Checking of frame boundaries is only approximate and can fail
to reliably detect frames whose onscreen/offscreen state depends on a
few pixels, especially near the right / bottom borders of the screen."
:type '(choice (const :tag "Only fully offscreen frames" t)
(const :tag "Also partially offscreen frames" :all)
(const :tag "Also partially offscreen frames" all)
(const :tag "Do not force frames onscreen" nil))
:group 'desktop
:version "24.4")
......@@ -417,7 +417,7 @@ few pixels, especially near the right / bottom borders of the screen."
(defcustom desktop-restore-reuses-frames t
"If t, restoring frames reuses existing frames.
If nil, existing frames are deleted.
If `:keep', existing frames are kept and not reused."
If `keep', existing frames are kept and not reused."
:type '(choice (const :tag "Reuse existing frames" t)
(const :tag "Delete existing frames" nil)
(const :tag "Keep existing frames" :keep))
......@@ -692,7 +692,7 @@ if different)."
(frame-parameter frame 'desktop-dont-clear))
(delete-frame frame))
(error
(delay-warning 'desktop (error-message-string err))))))))
(delay-warning 'desktop (error-message-string err))))))))
;; ----------------------------------------------------------------------------
(unless noninteractive
......@@ -1058,7 +1058,8 @@ This function depends on the value of `desktop-saved-frameset'
being set (usually, by reading it from the desktop)."
(when (desktop-restoring-frameset-p)
(frameset-restore desktop-saved-frameset
:reuse-frames desktop-restore-reuses-frames
:reuse-frames (eq desktop-restore-reuses-frames t)
:cleanup-frames (not (eq desktop-restore-reuses-frames 'keep))
:force-display desktop-restore-in-current-display
:force-onscreen desktop-restore-forces-onscreen)))
......
......@@ -786,10 +786,9 @@ PROPERTIES is a user-defined property list to add to the frameset."
;; Restoring framesets
(defvar frameset--reuse-list nil
"The list of frames potentially reusable.
Its value is only meaningful during execution of `frameset-restore'.
Internal use only.")
;; Dynamically bound in `frameset-restore'.
(defvar frameset--reuse-list)
(defvar frameset--action-map)
(defun frameset-compute-pos (value left/top right/bottom)
"Return an absolute positioning value for a frame.
......@@ -871,7 +870,7 @@ NOTE: This only works for non-iconified frames."
(modify-frame-parameters frame params))))))
(defun frameset--find-frame-if (predicate display &rest args)
"Find a frame in `frameset--reuse-list' satisfying PREDICATE.
"Find a reusable frame satisfying PREDICATE.
Look through available frames whose display property matches DISPLAY
and return the first one for which (PREDICATE frame ARGS) returns t.
If PREDICATE is nil, it is always satisfied. Internal use only."
......@@ -982,16 +981,20 @@ Internal use only."
(push visible alt-cfg)
(push (cons 'fullscreen fullscreen) alt-cfg)))
;; Time to find or create a frame an apply the big bunch of parameters.
;; If a frame needs to be created and it falls partially or fully offscreen,
;; sometimes it gets "pushed back" onscreen; however, moving it afterwards is
;; allowed. So we create the frame as invisible and then reapply the full
;; parameter alist (including position and size parameters).
(setq frame (or (and frameset--reuse-list
(frameset--reuse-frame display filtered-cfg))
(make-frame-on-display display
(cons '(visibility)
(frameset--initial-params filtered-cfg)))))
;; Time to find or create a frame and apply the big bunch of parameters.
(setq frame (and frameset--reuse-list
(frameset--reuse-frame display filtered-cfg)))
(if frame
(puthash frame :reused frameset--action-map)
;; If a frame needs to be created and it falls partially or fully offscreen,
;; sometimes it gets "pushed back" onscreen; however, moving it afterwards is
;; allowed. So we create the frame as invisible and then reapply the full
;; parameter alist (including position and size parameters).
(setq frame (make-frame-on-display display
(cons '(visibility)
(frameset--initial-params filtered-cfg))))
(puthash frame :created frameset--action-map))
(modify-frame-parameters frame
(if (eq (frame-parameter frame 'fullscreen) fullscreen)
;; Workaround for bug#14949
......@@ -1038,7 +1041,8 @@ For the meaning of FORCE-DISPLAY, see `frameset-restore'."
;;;###autoload
(cl-defun frameset-restore (frameset
&key predicate filters reuse-frames
force-display force-onscreen)
force-display force-onscreen
cleanup-frames)
"Restore a FRAMESET into the current display(s).
PREDICATE is a function called with two arguments, the parameter alist
......@@ -1050,58 +1054,79 @@ and window-state is not restored.
FILTERS is an alist of parameter filters; if nil, the value of
`frameset-filter-alist' is used instead.
REUSE-FRAMES selects the policy to use to reuse frames when restoring:
t Reuse existing frames if possible, and delete those not reused.
nil Restore frameset in new frames and delete existing frames.
:keep Restore frameset in new frames and keep the existing ones.
LIST A list of frames to reuse; only these are reused (if possible).
Remaining frames in this list are deleted; other frames not
included on the list are left untouched.
REUSE-FRAMES selects the policy to reuse frames when restoring:
t All existing frames can be reused.
nil No existing frame can be reused.
match Only frames with matching frame ids can be reused.
PRED A predicate function; it receives as argument a live frame,
and must return non-nil to allow reusing it, nil otherwise.
FORCE-DISPLAY can be:
t Frames are restored in the current display.
nil Frames are restored, if possible, in their original displays.
:delete Frames in other displays are deleted instead of restored.
delete Frames in other displays are deleted instead of restored.
PRED A function called with two arguments, the parameter alist and
the window state (in that order). It must return t, nil or
`:delete', as above but affecting only the frame that will
`delete', as above but affecting only the frame that will
be created from that parameter alist.
FORCE-ONSCREEN can be:
t Force onscreen only those frames that are fully offscreen.
nil Do not force any frame back onscreen.
:all Force onscreen any frame fully or partially offscreen.
all Force onscreen any frame fully or partially offscreen.
PRED A function called with three arguments,
- the live frame just restored,
- a list (LEFT TOP WIDTH HEIGHT), describing the frame,
- a list (LEFT TOP WIDTH HEIGHT), describing the workarea.
It must return non-nil to force the frame onscreen, nil otherwise.
CLEANUP-FRAMES allows to \"clean up\" the frame list after restoring a frameset:
t Delete all frames that were not created or restored upon.
nil Keep all frames.
FUNC A function called with two arguments:
- FRAME, a live frame.
- ACTION, which can be one of
:rejected Frame existed, but was not a candidate for reuse.
:ignored Frame existed, was a candidate, but wasn't reused.
:reused Frame existed, was a candidate, and restored upon.
:created Frame didn't exist, was created and restored upon.
Return value is ignored.
Note the timing and scope of the operations described above: REUSE-FRAMES
affects existing frames; PREDICATE, FILTERS and FORCE-DISPLAY affect the frame
being restored before that happens; and FORCE-ONSCREEN affects the frame once
it has been restored.
being restored before that happens; FORCE-ONSCREEN affects the frame once
it has been restored; and CLEANUP-FRAMES affects all frames alive after the
restoration, including those that have been reused or created anew.
All keyword parameters default to nil."
(cl-assert (frameset-valid-p frameset))
(let (other-frames)
;; frameset--reuse-list is a list of frames potentially reusable. Later we
;; will decide which ones can be reused, and how to deal with any leftover.
(pcase reuse-frames
((or `nil `:keep)
(setq frameset--reuse-list nil
other-frames (frame-list)))
((pred consp)
(setq frameset--reuse-list (copy-sequence reuse-frames)
other-frames (cl-delete-if (lambda (frame)
(memq frame frameset--reuse-list))
(frame-list))))
(_
(setq frameset--reuse-list (frame-list)
other-frames nil)))
(let* ((frames (frame-list))
(frameset--action-map (make-hash-table :test #'eq))
;; frameset--reuse-list is a list of frames potentially reusable. Later we
;; will decide which ones can be reused, and how to deal with any leftover.
(frameset--reuse-list
(pcase reuse-frames
(`t
frames)
(`nil
nil)
(`match
(cl-loop for (state) in (frameset-states frameset)
when (frameset-frame-with-id (frameset-cfg-id state) frames)
collect it))
((pred functionp)
(cl-remove-if-not reuse-frames frames))
(_
(error "Invalid arg :reuse-frames %s" reuse-frames)))))
;; Mark existing frames in the map; candidates to reuse are marked as :ignored;
;; they will be reassigned later, if chosen.
(dolist (frame frames)
(puthash frame
(if (memq frame frameset--reuse-list) :ignored :rejected)
frameset--action-map))
;; Sort saved states to guarantee that minibufferless frames will be created
;; after the frames that contain their minibuffer windows.
......@@ -1131,17 +1156,15 @@ All keyword parameters default to nil."
;; - we're switching displays, and the user chose the option to delete, or
;; - we're switching to tty, and the frame to restore is minibuffer-only.
(unless (and frameset--target-display
(or (eq force-display :delete)
(or (eq force-display 'delete)
(and to-tty
(eq (cdr (assq 'minibuffer frame-cfg)) 'only))))
;; To avoid duplicating frame ids after restoration, we note any
;; existing frame whose id matches a frame configuration in the
;; frameset. Once the frame config is properly restored, we can
;; reset the old frame's id to nil.
(setq duplicate (and other-frames
(or (eq reuse-frames :keep) (consp reuse-frames))
(frameset-frame-with-id (frameset-cfg-id frame-cfg)
other-frames)))
(setq duplicate (frameset-frame-with-id (frameset-cfg-id frame-cfg)
frames))
;; Restore minibuffers. Some of this stuff could be done in a filter
;; function, but it would be messy because restoring minibuffers affects
;; global state; it's best to do it here than add a bunch of global
......@@ -1187,20 +1210,27 @@ All keyword parameters default to nil."
;; other frames are already visible (discussed in thread for bug#14841).
(sit-for 0 t)
;; Delete remaining frames, but do not fail if some resist being deleted.
(unless (eq reuse-frames :keep)
(dolist (frame (sort (nconc (if (listp reuse-frames) nil other-frames)
frameset--reuse-list)
;; Minibufferless frames must go first to avoid
;; errors when attempting to delete a frame whose
;; minibuffer window is used by another frame.
#'frameset-minibufferless-first-p))
(condition-case err
(delete-frame frame)
(error
(delay-warning 'frameset (error-message-string err))))))
(setq frameset--reuse-list nil
frameset--target-display nil)
;; Clean temporary caches
(setq frameset--target-display nil)
;; Clean up the frame list
(when cleanup-frames
(let ((map nil)
(cleanup (if (eq cleanup-frames t)
(lambda (frame action)
(when (memq action '(:rejected :ignored))
(delete-frame frame)))
cleanup-frames)))
(maphash (lambda (frame _action) (push frame map)) frameset--action-map)
(dolist (frame (sort map
;; Minibufferless frames must go first to avoid
;; errors when attempting to delete a frame whose
;; minibuffer window is used by another frame.
#'frameset-minibufferless-first-p))
(condition-case-unless-debug err
(funcall cleanup frame (gethash frame frameset--action-map))
(error
(delay-warning 'frameset (error-message-string err) :warning))))))
;; Make sure there's at least one visible frame.
(unless (or (daemonp) (visible-frame-list))
......@@ -1212,23 +1242,21 @@ All keyword parameters default to nil."
(defun frameset--jump-to-register (data)
"Restore frameset from DATA stored in register.
Called from `jump-to-register'. Internal use only."
(let ((fs (aref data 0))
reuse-frames iconify-list)
(if current-prefix-arg
;; Reuse all frames and delete any left unused
(setq reuse-frames t)
;; Reuse matching frames and leave others to be iconified
(setq iconify-list (frame-list))
(dolist (state (frameset-states fs))
(let ((frame (frameset-frame-with-id (frameset-cfg-id (car state))
iconify-list)))
(when frame
(push frame reuse-frames)
(setq iconify-list (delq frame iconify-list))))))
(frameset-restore fs
:filters frameset-session-filter-alist
:reuse-frames reuse-frames)
(mapc #'iconify-frame iconify-list))
(frameset-restore
(aref data 0)
:filters frameset-session-filter-alist
:reuse-frames (if current-prefix-arg t 'match)
:cleanup-frames (if current-prefix-arg
;; delete frames
nil
;; iconify frames
(lambda (frame action)
(pcase action
(`rejected (iconify-frame frame))
;; In the unexpected case that a frame was a candidate
;; (matching frame id) and yet not restored, remove it
;; because it is in fact a duplicate.
(`ignored (delete-frame frame))))))
;; Restore selected frame, buffer and point.
(let ((frame (frameset-frame-with-id (aref data 1)))
......
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