[nongnu] elpa/workroom b43818f6c7 01/74: Minimal working implementation with bookmark support

[ELPA Syncer]

branch: elpa/workroom
commit b43818f6c70ba38a15cab236bd8fae35dfec358a
Author: Akib Azmain Turja <akib@disroot.org>
Commit: Akib Azmain Turja <akib@disroot.org>

    Minimal working implementation with bookmark support
---
 COPYING     | 674 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 workroom.el | 744 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 1418 insertions(+)

diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000000..f288702d2f
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
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+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/workroom.el b/workroom.el
new file mode 100644
index 0000000000..c8d884f5d0
--- /dev/null
+++ b/workroom.el
@@ -0,0 +1,744 @@
+;;; workroom.el --- Named rooms for doing work without irrelevant distracting 
buffers  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2022 Akib Azmain Turja.
+
+;; Author: Akib Azmain Turja <akib@disroot.org>
+;; Version: 0.1
+;; Package-Requires: ((emacs "27.2"))
+;; Keywords: tools, convenience
+;; URL: https://codeberg.org/akib/emacs-workroom
+
+;; This file is not part of GNU Emacs.
+
+;; This file is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; For a full copy of the GNU General Public License
+;; see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'cl-lib)
+(require 'bookmark)
+
+(defgroup workroom nil
+  "Named rooms for doing work without irrelevant distracting buffers."
+  :group 'convenience
+  :prefix "workroom-"
+  :link '(url-link "https://codeberg.org/akib/emacs-workroom";))
+
+(defcustom workroom-default-room-name "master"
+  "Name of the default workroom.
+
+This workroom contains all live buffers of the current Emacs session.
+
+Workroom-Mode must be reenabled for changes to take effect."
+  :type 'string)
+
+(defcustom workroom-buffer-handler-alist
+  '((bookmark :encoder workroom--encode-buffer-bookmark
+              :decoder workroom--decode-buffer-bookmark))
+  "Alist of functions to encoding/decoding buffer to/from writable object.
+
+Each element of the list is of the form (IDENTIFIER . (:encoder ENCODER
+:decoder DECODER)), where ENCODE is a function to encode buffer to writable
+object and DECODER is a function to decode a writable object returned by
+ENCODER and create the corresponding buffer.  ENCODER is called with a
+single argument BUFFER, where BUFFER is the buffer to encode.  It should
+return nil if it can't encode BUFFER.  DECODER is called with a single
+argument OBJECT, where OBJECT is the object to decode.  It should not
+modify window configuration.  IDENTIFIER is used to get the appropiate
+decoder function for a object.
+
+Each element of the list tried to encode a buffer.  When no encoder
+function can encode the buffer, the buffer is not saved.
+
+NOTE: If you change IDENTIFIER, all buffers encoded with the previous value
+can't restored."
+  :type '(alist
+          :key-type (symbol :tag "Identifier")
+          :value-type (list (const :encoder)
+                            (function :tag "Encoder function")
+                            (const :decoder)
+                            (function :tag "Decoder function"))))
+
+(cl-defstruct workroom
+  "Structure for workroom."
+  (name nil
+        :documentation "Name of the workroom."
+        :type string)
+  (views nil
+         :documentation "Views of the workroom."
+         :type list)
+  (buffers nil
+           :documentation "Buffers of the workroom.")
+  (previous-view-list nil
+                      :documentation "List of previously selected views.")
+  (view-history nil
+                :documentation "`completing-read' history of view names."))
+
+(cl-defstruct workroom-view
+  "Structure for view of workroom."
+  (name nil
+        :documentation "Name of the view."
+        :type string)
+  (window-config nil
+                 :documentation "Window configuration of the view."))
+
+(defalias 'workroom-p 'workroomp)
+
+(defvar workroom--default-view-of-default-room "main"
+  "Name of default view of default workroom.")
+
+(defvar workroom--rooms nil
+  "List of currently live workrooms.")
+
+(defvar workroom--room-history nil
+  "`completing-read' history list of workroom names.")
+
+(defvar workroom--view-history nil
+  "`completing-read' history list of workroom view names.")
+
+(defvar workroom-mode)
+
+(defun workroom-get (name)
+  "Return the workroom named NAME.
+
+If no such workroom exists, return nil."
+  (catch 'found
+    (dolist (room workroom--rooms nil)
+      (when (equal name (workroom-name room))
+        (throw 'found room)))))
+
+(defun workroom-get-create (name)
+  "Return the workroom named NAME.
+
+If no such workroom exists, create a new one named NAME and return that."
+  (let ((room (workroom-get name)))
+    (unless room
+      (setq room (make-workroom
+                  :name name
+                  :buffers (list (get-buffer-create "*scratch*"))))
+      (push room workroom--rooms))
+    room))
+
+(defun workroom-get-default ()
+  "Return the default workroom."
+  (catch 'found
+    (dolist (room workroom--rooms nil)
+      (unless (listp (workroom-buffers room))
+        (throw 'found room)))))
+
+(defun workroom-view-get (room name)
+  "Return the view of ROOM named NAME.
+
+If no such view exists, return nil."
+  (catch 'found
+    (dolist (view (workroom-views room) nil)
+      (when (equal name (workroom-view-name view))
+        (throw 'found view)))))
+
+(defun workroom-view-get-create (room name)
+  "Return the view of ROOM named NAME.
+
+If no such view exists, create a new one named NAME and return that."
+  (let ((view (workroom-view-get room name)))
+    (unless view
+      (setq view (make-workroom-view :name name))
+      (push view (workroom-views room)))
+    view))
+
+(defun workroom-current-room (&optional frame)
+  "Return the current workroom of FRAME."
+  (frame-parameter frame 'workroom-current-room))
+
+(defun workroom-current-view (&optional frame)
+  "Return the current view of FRAME."
+  (frame-parameter frame 'workroom-current-view))
+
+(defun workroom-previous-room-list (&optional frame)
+  "Return the list of the previous workrooms of FRAME."
+  (frame-parameter frame 'workroom-previous-room-list))
+
+(defun workroom--read (prompt &optional def require-match predicate)
+  "Read the name of a workroom and return it as a string.
+
+Prompt with PROMPT, where PROMPT should be a string without trailing colon
+and/or space.
+
+Return DEF when input is empty, where DEF is either a string or nil.
+
+REQUIRE-MATCH and PREDICATE is same as in `completing-read'."
+  (completing-read (concat prompt
+                           (when def
+                             (format " (default %s)" def))
+                           ": ")
+                   (mapcar #'workroom-name workroom--rooms)
+                   predicate require-match nil 'workroom--room-history
+                   def))
+
+(defun workroom--read-to-switch (prompt &optional def require-match
+                                        predicate)
+  "Read the name of a workroom other than current one and return it.
+
+See `workroom--read' for PROMPT, DEF, REQUIRE-MATCH and PREDICATE."
+  (workroom--read prompt def require-match
+                  (lambda (cand)
+                    (and (not (equal
+                               (workroom-name (workroom-current-room))
+                               (if (consp cand) (car cand) cand)))
+                         (if predicate
+                             (funcall predicate cand)
+                           t)))))
+
+(defun workroom--read-view (room prompt &optional def require-match
+                                 predicate)
+  "Read the name of a view of ROOM and return it as a string.
+
+Prompt with PROMPT, where PROMPT should be a string without trailing colon
+and/or space.
+
+Return DEF when input is empty, where DEF is either a string or nil.
+
+REQUIRE-MATCH and PREDICATE is same as in `completing-read'."
+  (let ((workroom--view-history (workroom-view-history room)))
+    (prog1
+        (completing-read (concat prompt
+                                 (when def
+                                   (format " (default %s)" def))
+                                 ": ")
+                         (mapcar #'workroom-view-name
+                                 (workroom-views room))
+                         predicate require-match nil
+                         'workroom--room-history def)
+      (setf (workroom-view-history room) workroom--view-history))))
+
+(defun workroom--read-view-to-switch (room prompt &optional def
+                                           require-match predicate)
+  "Read the name of a view of ROOM other than current one and return it.
+
+See `workroom--read' for PROMPT, DEF, REQUIRE-MATCH and PREDICATE."
+  (workroom--read-view room prompt def require-match
+                       (if (eq room (workroom-current-room))
+                           (lambda (cand)
+                             (and (not (equal
+                                        (workroom-view-name
+                                         (workroom-current-view))
+                                        (if (consp cand) (car cand) cand)))
+                                  (if predicate
+                                      (funcall predicate cand)
+                                    t)))
+                         predicate)))
+
+(defun workroom--read-member-buffer (room prompt &optional def
+                                          require-match predicate
+                                          literal-prompt)
+  "Read the name of a member buffer of ROOM.
+
+ROOM should be a `workroom'.  Prompt with PROMPT, where PROMPT should be a
+string.  When LITERAL-PROMPT is nil, \": \" is appended to PROMPT.  DEF,
+REQUIRE-MATCH and PREDICATE is same as in `read-buffer'."
+  (let ((read-buffer-function nil))
+    (unless literal-prompt
+      (setq prompt (concat prompt
+                           (when def
+                             (format " (default %s)" def))
+                           ": ")))
+    (if (not (listp (workroom-buffers room)))
+        (read-buffer prompt def require-match predicate)
+      (read-buffer prompt def require-match
+                   (lambda (cand)
+                     (and (member
+                           (get-buffer (if (consp cand) (car cand) cand))
+                           (workroom-buffers room))
+                          (if predicate
+                              (funcall predicate cand)
+                            t)))))))
+
+(defun workroom--read-non-member-buffer (room prompt &optional def
+                                              require-match predicate
+                                              literal-prompt)
+  "Read the name of a buffer which isn't a member of ROOM.
+
+ROOM should be a `workroom'.  Prompt with PROMPT, where PROMPT should be a
+string.  When LITERAL-PROMPT is nil, \": \" is appended to PROMPT.  DEF,
+REQUIRE-MATCH and PREDICATE is same as in `read-buffer'."
+  (let ((read-buffer-function nil))
+    (unless literal-prompt
+      (setq prompt (concat prompt
+                           (when def
+                             (format " (default %s)" def))
+                           ": ")))
+    (if (not (listp (workroom-buffers room)))
+        (read-buffer prompt def require-match #'ignore) ; No candidate
+      (read-buffer prompt def require-match
+                   (lambda (cand)
+                     (and (not (member
+                                (get-buffer (if (consp cand)
+                                                (car cand)
+                                              cand))
+                                (workroom-buffers room)))
+                          (if predicate
+                              (funcall predicate cand)
+                            t)))))))
+
+(defun workroom-read-buffer-function (prompt &optional def
+                                             require-match predicate)
+  "Read buffer function restricted to buffers of the current workspace.
+
+PROMPT, DEF, REQUIRE-MATCH and PREDICATE is same as in `read-buffer'."
+  (workroom--read-member-buffer (workroom-current-room) prompt def
+                                require-match predicate t))
+
+(defun workroom--save-window-config ()
+  "Return a object describing the current window configuration."
+  (window-state-get (frame-root-window)))
+
+(defun workroom--load-window-config (state)
+  "Load window configuration STATE."
+  (if state
+      (cl-labels ((sanitize
+                   (entry)
+                   (cond
+                    ((or (not (consp entry))
+                         (atom (cdr entry)))
+                     entry)
+                    ((eq (car entry) 'leaf)
+                     (let ((writable nil))
+                       (let ((buffer (car (alist-get 'buffer
+                                                     (cdr entry)))))
+                         (when (stringp buffer)
+                           (setq writable t))
+                         (unless (buffer-live-p (get-buffer buffer))
+                           (let ((scratch (get-buffer-create "*scratch*")))
+                             (with-current-buffer scratch
+                               (setf (car (alist-get 'buffer (cdr entry)))
+                                     (if writable "*scratch*" scratch))
+                               (setf (alist-get 'point
+                                                (cdr (alist-get
+                                                      'buffer
+                                                      (cdr entry))))
+                                     (if writable
+                                         (point-min)
+                                       (copy-marker
+                                        (point-min)
+                                        window-point-insertion-type)))
+                               (setf (alist-get 'start
+                                                (cdr (alist-get
+                                                      'buffer
+                                                      (cdr entry))))
+                                     (if writable
+                                         (point-min)
+                                       (copy-marker (point-min))))))))
+                       (let ((prev (alist-get 'prev-buffers (cdr entry))))
+                         (setf
+                          (alist-get 'prev-buffers (cdr entry))
+                          (mapcar
+                           (lambda (entry)
+                             (if (buffer-live-p (get-buffer (car entry)))
+                                 entry
+                               (let ((scratch (get-buffer-create
+                                               "*scratch*")))
+                                 (with-current-buffer scratch
+                                   (if writable
+                                       (list "*scratch*"
+                                             (point-min)
+                                             (point-min))
+                                     (list
+                                      scratch
+                                      (copy-marker (point-min))
+                                      (copy-marker
+                                       (point-min)
+                                       window-point-insertion-type)))))))
+                           prev)))
+                       (let ((next (alist-get 'next-buffers (cdr entry))))
+                         (setf (alist-get 'next-buffers (cdr entry))
+                               (mapcar
+                                (lambda (buffer)
+                                  (if (buffer-live-p (get-buffer buffer))
+                                      buffer
+                                    (let ((buffer (get-buffer-create
+                                                   "*scratch*")))
+                                      (if writable "*scratch*" buffer))))
+                                next))))
+                     entry)
+                    (t
+                     (mapcar #'sanitize entry)))))
+        (window-state-put (cons (car state) (sanitize (cdr state)))
+                          (frame-root-window) 'safe))
+    (delete-other-windows)
+    (set-window-dedicated-p (selected-window) nil)
+    (switch-to-buffer "*scratch*")))
+
+(defun workroom--encode-buffer-bookmark (buffer)
+  "Encode BUFFER using `bookmark-make-record'."
+  (with-current-buffer buffer
+    (ignore-errors
+      (bookmark-make-record))))
+
+(defun workroom--decode-buffer-bookmark (object)
+  "Decode OBJECT using `bookmark-jump'."
+  (save-window-excursion
+
+    ;; Make sure `display-buffer' only changes the window configuration of
+    ;; the selected frame, so that `save-window-excursion' can revert it.
+    (let* ((buffers nil)
+           (display-buffer-overriding-action
+            `(,(lambda (buffer _)
+                 (push buffer buffers)
+                 (set-window-buffer (frame-first-window) buffer))
+              . nil)))
+      (bookmark-jump object)
+      (car buffers))))
+
+(defun workroom--encode (room)
+  "Encode workroom ROOM to a printable object."
+  (cons
+   0                                    ; Format.
+   (list (workroom-name room)
+         (mapcar (lambda (view)
+                   (cons (workroom-view-name view)
+                         (save-window-excursion
+                           (workroom--load-window-config
+                            (workroom-view-window-config view))
+                           (window-state-get (frame-root-window) t))))
+                 (workroom-views room))
+         (cl-remove-if
+          #'null
+          (mapcar (lambda (buffer)
+                    (catch 'done
+                      (dolist (entry workroom-buffer-handler-alist nil)
+                        (when-let ((object (funcall (plist-get (cdr entry)
+                                                               :encoder)
+                                                    buffer)))
+                          (throw 'done (cons (car entry) object))))))
+                  (workroom-buffers room))))))
+
+(defun workroom--decode (object)
+  "Decode OBJECT to a workroom."
+  (pcase (car object)
+    (0
+     (make-workroom
+      :name (nth 0 (cdr object))
+      :views (mapcar (lambda (view-obj)
+                       (make-workroom-view
+                        :name (car view-obj)
+                        :window-config (cdr view-obj)))
+                     (nth 1 (cdr object)))
+      :buffers (mapcar (lambda (entry)
+                         (funcall
+                          (plist-get
+                           (alist-get (car entry)
+                                      workroom-buffer-handler-alist)
+                           :decoder)
+                          (cdr entry)))
+                       (nth 2 (cdr object)))))
+    (_
+     (error "Unknown format of encoding"))))
+
+(defun workroom--restore-rooms (data)
+  "Restore workrooms in DATA."
+  (pcase (car data)
+    ('workroom
+     (let ((room (workroom--decode (cdr data))))
+       (when-let ((existing (workroom-get (workroom-name room))))
+         (unless (y-or-n-p (format-message "Workroom `%s' already\
+ exists, overwrite? " (workroom-name room)))
+           (user-error (format-message "Workroom `%s' exists"
+                                       (workroom-name room))))
+         (workroom-kill existing))
+       (push room workroom--rooms)))
+    ('workroom-set
+     (unless (y-or-n-p "Your all workrooms will be overwritten, proceed? ")
+       (user-error "Cancelled"))
+     (let ((rooms nil)
+           (rooms-to-kill nil))
+       (dolist (object (cdr data))
+         (let ((room (workroom--decode object)))
+           (when-let ((existing (workroom-get (workroom-name room))))
+             (unless (y-or-n-p (format-message "Workroom `%s' already\
+ exists, overwrite? " (workroom-name room)))
+               (user-error (format-message "Workroom `%s' exists"
+                                           (workroom-name room))))
+             (push existing rooms-to-kill))
+           (push room rooms)))
+       (mapc #'workroom-kill rooms-to-kill)
+       (setq workroom--rooms (nconc rooms workroom--rooms))))))
+
+(defun workroom--read-bookmark (prompt)
+  "Read a bookmark name, prompting with PROMPT, without requiring match."
+  (bookmark-maybe-load-default-file)
+  (completing-read prompt (lambda (string predicate action)
+                            (if (eq action 'metadata)
+                                '(metadata (category . bookmark))
+                              (complete-with-action action bookmark-alist
+                                                    string predicate)))
+                   nil nil nil 'bookmark-history))
+
+(defun workroom--remove-buffer-refs ()
+  "Remove references of current buffer from all workrooms."
+  (dolist (room workroom--rooms)
+    (when (listp (workroom-buffers room))
+      (workroom-remove-buffer (current-buffer) room))))
+
+(defmacro workroom--require-mode-enable (&rest body)
+  "Execute BODY if Workroom-Mode is enabled, otherwise signal error."
+  (declare (indent 0))
+  `(if (not workroom-mode)
+       (user-error "Workroom mode is not enabled")
+     ,@body))
+
+;;;###autoload
+(defun workroom--handle-bookmark (bookmark)
+  "Handle BOOKMARK."
+  (workroom--require-mode-enable
+    (let ((data (alist-get 'data (bookmark-get-bookmark-record bookmark))))
+      (workroom--restore-rooms data))))
+
+(defun workroom-switch (room view)
+  "Switch to workroom ROOM if not already and switch to view VIEW of ROOM.
+
+If called interactively, prompt for view to switch.  If prefix argument is
+given, ask for workroom to switch before.
+
+ROOM may be a `workroom' object or string.  If ROOM is a `workroom' object,
+switch to that workroom.  If ROOM is a string, create a workroom with that
+name if it doesn't exist, then switch to the workroom."
+  (interactive
+   (workroom--require-mode-enable
+     (let ((room
+            (if current-prefix-arg
+                (workroom-get-create
+                 (workroom--read-to-switch
+                  "Switch to workroom"
+                  (when-let ((prev (car (workroom-previous-room-list))))
+                    (workroom-name prev))))
+              (workroom-current-room))))
+       (list room (workroom--read-view-to-switch
+                   room "Switch to view"
+                   (when-let ((prev
+                               (car (workroom-previous-view-list room))))
+                     (workroom-view-name prev)))))))
+  (when (stringp room)
+    (setq room (workroom-get-create room)))
+  (when (stringp view)
+    (setq view (workroom-view-get-create room view)))
+  (unless (eq room (workroom-current-room))
+    (when (workroom-current-room)
+      (set-frame-parameter
+       nil 'workroom-previous-room-list
+       (cons (workroom-current-room)
+             (frame-parameter nil 'workroom-previous-room-list))))
+    (set-frame-parameter nil 'workroom-current-room room))
+  (unless (eq view (workroom-current-view))
+    (when (workroom-current-view)
+      (setf (workroom-view-window-config (workroom-current-view))
+            (workroom--save-window-config)))
+    (set-frame-parameter nil 'workroom-current-view view)
+    (workroom--load-window-config (workroom-view-window-config view))))
+
+(defun workroom-kill (room)
+  "Kill workroom ROOM."
+  (interactive (workroom--require-mode-enable
+                 (list (workroom--read
+                        "Kill workroom" (workroom-name
+                                         (workroom-current-room))
+                        t (lambda (cand)
+                            (listp (workroom-buffers
+                                    (workroom-get (if (consp cand)
+                                                      (car cand)
+                                                    cand)))))))))
+  (when (stringp room)
+    (setq room (workroom-get room)))
+  (when room
+    (unless (listp (workroom-buffers room))
+      (user-error "Cannot kill default workroom"))
+    (when (eq room (workroom-current-room))
+      (workroom-switch (workroom-get-default)
+                       workroom--default-view-of-default-room))
+    (setq workroom--rooms (delete room workroom--rooms))))
+
+(defun workroom-kill-view (room view)
+  "Kill view VIEW of workroom ROOM."
+  (interactive
+   (workroom--require-mode-enable
+     (let ((room
+            (if current-prefix-arg
+                (workroom-get
+                 (workroom--read
+                  "Parent workroom"
+                  (workroom-name (workroom-current-room))))
+              (workroom-current-room))))
+       (list room (workroom--read-view
+                   room "Kill view"
+                   (when (eq room (workroom-current-room))
+                     (workroom-view-name (workroom-current-view))))))))
+  (when (stringp room)
+    (setq room (workroom-get room)))
+  (when (stringp view)
+    (setq view (workroom-view-get room view)))
+  (when (and room view)
+    (when (eq (length (workroom-views room)) 1)
+      (user-error "Cannot kill the last view of a workroom"))
+    (when (eq view (workroom-current-view))
+      (workroom-switch room (car (workroom-views room)))
+      (pop (workroom-previous-view-list room)))
+    (setf (workroom-views room) (delete view (workroom-views room)))))
+
+(defun workroom-bookmark (room name no-overwrite)
+  "Save workroom ROOM to a bookmark named NAME.
+
+If NO-OVERWRITE is nil or prefix arg is given, don't overwrite any previous
+bookmark with the same name.
+
+The default workroom cannot be saved."
+  (interactive (list (workroom--read "Workroom" nil t
+                                     (lambda (cand)
+                                       (not (equal (workroom-name
+                                                    (workroom-get-default))
+                                                   (if (consp cand)
+                                                       (car cand)
+                                                     cand)))))
+                     (workroom--read-bookmark "Save to bookmark: ")
+                     current-prefix-arg))
+  (dolist (frame (frame-list))
+    (with-selected-frame frame
+      (setf (workroom-view-window-config (workroom-current-view))
+            (workroom--save-window-config))))
+  (bookmark-store name `((data . (workroom . ,(workroom--encode room)))
+                         (handler . workroom--handle-bookmark))
+                  no-overwrite))
+
+(defun workroom-bookmark-all (name no-overwrite)
+  "Save all workrooms except the default one to a bookmark named NAME.
+
+If NO-OVERWRITE is nil or prefix arg is given, don't overwrite any previous
+bookmark with the same name."
+  (interactive (list (workroom--read-bookmark "Save to bookmark: ")
+                     current-prefix-arg))
+  (dolist (frame (frame-list))
+    (with-selected-frame frame
+      (setf (workroom-view-window-config (workroom-current-view))
+            (workroom--save-window-config))))
+  (bookmark-store name
+                  `((data . (workroom-set . ,(mapcar
+                                              #'workroom--encode
+                                              (remove
+                                               (workroom-get-default)
+                                               workroom--rooms))))
+                    (handler . workroom--handle-bookmark))
+                  no-overwrite))
+
+(defun workroom-add-buffer (buffer &optional room)
+  "Add BUFFER to ROOM.
+
+ROOM should be a `workroom'.  When ROOM is a `workroom' object, add BUFFER
+to it.  If ROOM is nil, add BUFFER to the room of the selected frame.
+
+If ROOM is the default workroom, do nothing."
+  (interactive (workroom--require-mode-enable
+                 (list (get-buffer-create
+                        (workroom--read-non-member-buffer
+                         (workroom-current-room) "Add buffer"))
+                       nil)))
+  (unless room
+    (setq room (workroom-current-room)))
+  (when (listp (workroom-buffers room))
+    (unless (member buffer (workroom-buffers room))
+      (push buffer (workroom-buffers room)))))
+
+(defun workroom-remove-buffer (buffer &optional room)
+  "Remove BUFFER from ROOM.
+
+ROOM should be a `workroom'.  When ROOM is a `workroom' object, remove
+BUFFER from it.  If ROOM is nil, remove BUFFER to the room of the selected
+frame.
+
+If ROOM is the default workroom, kill buffer."
+  (interactive (workroom--require-mode-enable
+                 (list (get-buffer
+                        (workroom--read-member-buffer
+                         (workroom-current-room)
+                         "Remove buffer" nil t))
+                       nil)))
+  (unless room
+    (setq room (workroom-current-room)))
+  (if (listp (workroom-buffers room))
+      (when (member buffer (workroom-buffers room))
+        (setf (workroom-buffers room)
+              (delete buffer (workroom-buffers room))))
+    (kill-buffer buffer)))
+
+(defmacro workroom-define-replacement (fn)
+  "Define `workroom-FN' as replacement for FN.
+
+The defined function is restricts user to the buffers of current workroom
+while selecting buffer by setting `read-buffer' function to
+`workroom-read-buffer-function', unless prefix arg is given."
+  `(defun ,(intern (format "workroom-%S" fn)) ()
+     ,(format "Like `%S' but restricted to current workroom unless prefix \
+arg is given." fn)
+     (declare (interactive-only ,(format "Use `%S' instead." fn)))
+     (interactive)
+     (if current-prefix-arg
+         (call-interactively #',fn)
+       (let ((read-buffer-function #'workroom-read-buffer-function))
+         (call-interactively #',fn)))))
+
+(workroom-define-replacement switch-to-buffer)
+(workroom-define-replacement kill-buffer)
+
+;;;###autoload
+(define-minor-mode workroom-mode
+  "Toggle workroom mode."
+  :init-value nil
+  :lighter (" WR[" (:eval (workroom-name (workroom-current-room))) "]["
+            (:eval (workroom-view-name (workroom-current-view))) "]")
+  :global t
+  (if workroom-mode
+      (progn
+        (let ((default-room (workroom-get-default)))
+          (unless default-room
+            (setq default-room
+                  (make-workroom
+                   :name workroom-default-room-name
+                   :views (list
+                           (make-workroom-view
+                            :name workroom--default-view-of-default-room
+                            :window-config
+                            (workroom--save-window-config)))
+                   :buffers 'all))
+            (push default-room workroom--rooms))
+          (unless (equal (workroom-name default-room)
+                         workroom-default-room-name)
+            (setf (workroom-name default-room)
+                  workroom-default-room-name))
+          (dolist (frame (frame-list))
+            (with-selected-frame frame
+              (workroom-switch default-room
+                               workroom--default-view-of-default-room)
+              (set-frame-parameter nil 'workroom-previous-room-list
+                                   (cdr
+                                    (frame-parameter
+                                     nil 'workroom-previous-room-list))))))
+        (add-hook 'kill-buffer-hook #'workroom--remove-buffer-refs))
+    (dolist (frame (frame-list))
+      (with-selected-frame frame
+        (setf (workroom-view-window-config (workroom-current-view))
+              (workroom--save-window-config))
+        (set-frame-parameter nil 'workroom-current-room nil)
+        (set-frame-parameter nil 'workroom-current-view nil)
+        (set-frame-parameter nil 'workroom-previous-room-list nil)))
+    (remove-hook 'kill-buffer-hook #'workroom--remove-buffer-refs)))
+
+(provide 'workroom)
+;;; workroom.el ends here