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w3m-session.el
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;;; w3m-session.el --- Functions to operate session of w3m -*- coding: utf-8; -*-
;; Copyright (C) 2001-2003, 2005-2013, 2017-2020
;; TSUCHIYA Masatoshi <[email protected]>
;; Author: Hideyuki SHIRAI <[email protected]>
;; Keywords: w3m, WWW, hypermedia
;; Homepage: http://emacs-w3m.namazu.org/
;; 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 2, 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; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; w3m-session.el is an add-on program of emacs-w3m to save, load,
;; delete, and rename sessions or their selected tabs.
;; You need not load or restore an entire session. You can examine and
;; manage the contents (individual tabs) of any session, including
;; deleting, renaming, or loading them one at a time.
;; A session is any collection of buffers (tabs) open at any given
;; time. Be aware, however, that unfortunately much of the code and
;; documentation uses the terms session and buffer interchangeably.
;; There is also a term 'session-group' which is identical to a
;; session which has more than buffer. Yes, this does need to be
;; refactored!
;; Session management does its best to automatically keep track of the
;; current collection of w3m buffers so that should a catastrophic
;; crash occur, the entire session can be restored. Upon restarting
;; emacs-w3m after a crash, the user will be prompted whether to
;; recover the prior session. Additionally, the user may at any time
;; manually save the current session, or restore the tabs of a prior
;; session. Note that restoring a prior session is not destructive; it
;; only adds new tabs into the current session for each tab of the
;; saved session.
;; Session information is also saved when one quits emacs-w3m using
;; the `w3m-quit' command, bound by default to `Q'.
;; The session information for all sessions are stored as a single
;; elisp object, by default in file ~/.w3m/.session. Tab content is
;; NOT stored. What is stored for each tab is the url, title, cursor
;; position, and tab history. Even so, this can eventually become a
;; monstrously large data structure, and probably needlessly, if one
;; accumulates large history records for each tab.
;;;; Typical usage and tutorial
;; One enters session management by evaluating `w3m-session-select'
;; (M-s). Typically, there will be at least one session automatically
;; present, either labeled as a crash recovery session or an
;; automatically saved one. Next to each session name will be a number
;; in brackets representing the number of tab (buffers) in the
;; session. There will also be column entries for the session
;; timestamp, and summary URL entries. One exits session management
;; with either `q' or `C-g'.
;; From any emacs-w3m buffer one may save a session by evaluating
;; `w3m-session-save' (M-S).
;; From within session management, one can rename (`r') or delete
;; (`d') any session. Sessions can also be merged ('m'). Selecting a
;; session using the RET key will load ALL of that session's tabs. You
;; can examine the details of a session by pressing `M-s' (the same
;; key binding you used to enter the session management). At this
;; point, you can rename, delete, or load any individual tab. Note
;; that the first entry on the list gives you a second chance to load
;; ALL the tabs. Quitting returns you to the session list.
;; All changes are saved to disk immediately.
;;; Code:
(require 'w3m-util)
(defvar w3m-async-exec)
(defvar w3m-current-title)
(defvar w3m-current-url)
(defvar w3m-history)
(defvar w3m-history-flat)
(defvar w3m-language)
(defvar w3m-mode-map)
(defvar w3m-profile-directory)
(declare-function w3m--setup-popup-window "w3m" (toggle buffer-name nomsg))
(declare-function w3m-goto-url-new-session "w3m"
(url &optional reload charset post-data referer no-popup))
(declare-function w3m-history-slimmed-history-flat "w3m-hist")
(declare-function w3m-history-tree "w3m-hist" (&optional newpos))
(declare-function w3m-load-list "w3m" (file &optional coding-system))
(declare-function w3m-message "w3m" (&rest args))
(declare-function w3m-save-list "w3m"
(file list &optional coding-system escape-ctl-chars))
(autoload 'seq-position "seq")
(defvar w3m-session-group-open nil
"Which session-group is open.
If a session-group is currently open, i.e., when displaying a
list of buffers for an individual session, this should be set
to the session (session-group) number.
There is a legacy terminology problem that needs to be addressed
here. The documentation and symbol names currently confuse
'sessions', 'buffers`, and 'session-groups'. A 'session-group'
is identical to a 'session' that has more than one 'buffer'.")
(defcustom w3m-session-file
(expand-file-name ".sessions" w3m-profile-directory)
"File name to keep sessions."
:group 'w3m
:type 'file)
(defcustom w3m-session-autosave t
"Non-nil means save automatically when w3m quit."
:group 'w3m
:type 'boolean)
(defcustom w3m-session-deleted-save t
"Non-nil means save deleted sessions."
:group 'w3m
:type 'boolean)
(defcustom w3m-session-crash-recovery t
"If non-nil, recover session by auto-saved one when emacs-w3m crashes."
:group 'w3m
:type 'boolean)
(defcustom w3m-session-time-format
(if (equal "Japanese" w3m-language)
"%Y年%m月%d日(%a) %H:%M"
"%Y-%m-%d (%a) %H:%M")
"Format of saved time."
:group 'w3m
:type 'string)
(defcustom w3m-session-automatic-title
(if (equal "Japanese" w3m-language)
"自動保存"
"Automatic saved sessions")
"String of title to save session automatically."
:group 'w3m
:type 'string)
(defcustom w3m-session-deleted-title
(if (equal "Japanese" w3m-language)
"削除セッション"
"Removed sessions")
"String of title to save session when buffer delete."
:group 'w3m
:type 'string)
(defcustom w3m-session-crash-recovery-title
(if (equal "Japanese" w3m-language)
"クラッシュ回復"
"Crash recovery sessions")
"String of title to save session to use for crash recovering."
:group 'w3m
:type 'string)
(defcustom w3m-session-deleted-keep-number 5
"Number to keep sessions when buffers delete."
:group 'w3m
:type 'integer)
(defcustom w3m-session-automatic-keep-number 5
"Number to keep sessions automatically."
:group 'w3m
:type 'integer)
(defcustom w3m-session-unknown-title "<Unknown Title>"
"String of title to use when title is not specified."
:group 'w3m
:type 'string)
(defcustom w3m-session-load-last-sessions nil
"Whether to re-load the most recent session when emacs-w3m
starts."
:group 'w3m
:type
'(radio
(const :format "Re-load the last session automatically.\n" t)
(const :format "Ask whether to re-load the last session.\n" ask)
(const :format "Never re-load the last session automatically." nil)))
(defcustom w3m-session-load-crashed-sessions 'ask
"Whether to re-load a crashed session when emacs-w3m starts.
This is used when emacs-w3m determines that the most recent session crashed."
:group 'w3m
:type
'(radio
(const :format "Re-load the crashed session automatically.\n" t)
(const :format "Ask whether to re-load the crashed session.\n" ask)
(const :format "Never re-load the crashed session automatically." nil)))
(defface w3m-session-select
`((((class color) (background light) (type nil))
(:foreground "black"))
(((class color) (background dark) (type nil))
(:foreground "cyan"))
(((class color) (background light))
(:foreground "dark blue"))
(((class color) (background dark))
(:foreground "white"))
(t nil))
"Face of w3m-session."
:group 'w3m)
(defface w3m-session-selected
`((((class color) (background light) (type nil))
(:foreground "blue" :bold t :underline t))
(((class color) (background dark) (type nil))
(:foreground "cyan" :bold t :underline t))
(((class color) (background light))
(:foreground "dark blue" :bold t :underline t))
(((class color) (background dark))
(:foreground "white" :bold t :underline t))
(t (:bold t :underline t)))
"Face of selected w3m-session."
:group 'w3m)
(defun w3m-session-history-to-save ()
"Return a copy of `w3m-history-flat' without current page data."
(let ((pos (cadar w3m-history)))
(apply
'append
(mapcar (lambda (x)
(unless (equal (nth 2 x) pos)
(list x)))
(copy-sequence (w3m-history-slimmed-history-flat))))))
;; format of session file.
;; '((sessiontitle1 time1 ((url11 pos11 hflat11 urltitle11)
;; (url12 pos12 hflat12 urltitle12) ...) current1)
;; ...
(defmacro w3m-session-ignore-errors (&rest forms)
"Run FORMS. Remove `w3m-session-file' and quit if any error happens."
`(condition-case err
(progn ,@forms)
(error
(if (and (file-exists-p w3m-session-file)
(yes-or-no-p (format
"An error was found in \"%s\"; may we remove it? "
(abbreviate-file-name w3m-session-file))))
(progn
(delete-file w3m-session-file)
(run-at-time 0.1 nil #'message
"\"%s\" has been removed; try again."
(abbreviate-file-name w3m-session-file))
(keyboard-quit))
(signal (car err) (cdr err))))))
;;;###autoload
(defun w3m-session-save ()
"Save the current session (all currently open emacs-w3m buffers).
The user will be prompted for a name for the saved session. The
saved session information will include, for each currently open
emacs-w3m buffer: the current url and page title, and the
buffer's url history."
(interactive)
(w3m-session-ignore-errors
(let ((sessions (w3m-load-list w3m-session-file))
(bufs (w3m-list-buffers))
(prompt "New session title: ")
(cnum 0)
(i 0)
otitle title titles urls len buf cbuf)
(mapc (lambda (x)
(setq titles (cons (cons (car x) (car x)) titles)))
sessions)
(setq otitle (or w3m-current-title
(with-current-buffer (car bufs)
w3m-current-title)))
(setq titles (cons (cons otitle otitle) titles))
(while (not title)
;; A devious way to emulate INITIAL-INPUT that is deprecated.
(let ((minibuffer-setup-hook (lambda nil (insert otitle))))
(setq title (completing-read prompt titles nil nil nil nil otitle)))
(if (or (string= title "")
(and (assoc title sessions)
(not (y-or-n-p (format "\"%s\" exists. Overwrite? "
title)))))
(setq title nil)))
(setq cbuf (current-buffer))
(save-current-buffer
(while (setq buf (car bufs))
(setq bufs (cdr bufs))
(set-buffer buf)
(when w3m-current-url
(when (eq cbuf (current-buffer))
(setq cnum i))
(setq i (1+ i))
(setq urls (cons (list w3m-current-url
(copy-sequence (cadar w3m-history))
(w3m-session-history-to-save)
w3m-current-title)
urls)))))
(if (not urls)
(w3m--message t t "%s: no buffers saved...done" title)
(setq len (length urls))
(setq urls (nreverse urls))
(when (assoc title sessions)
(setq sessions (delq (assoc title sessions) sessions)))
(setq sessions (cons (list title (current-time) urls cnum) sessions))
(w3m-save-list w3m-session-file sessions)
(w3m--message t t "%s: %d buffer%s saved...done" title len (if (= len 1) "" "s"))
(when (and (setq buf (get-buffer " *w3m-session select*"))
(get-buffer-window buf 'visible))
(save-selected-window (w3m-session-select)))))))
(defun w3m-session-automatic-save ()
"Save list of displayed session automatically."
(when w3m-session-autosave
(w3m-session-ignore-errors
(let ((sessions (w3m-load-list w3m-session-file))
(bufs (w3m-list-buffers))
(title (concat w3m-session-automatic-title "-1"))
(titleregex (concat "\\`"
(regexp-quote w3m-session-automatic-title)
"-[0-9]+\\'"))
(cnum 0)
(i 0)
urls buf cbuf session
tmp tmptitle tmptime tmpurls)
(when bufs
(setq cbuf (current-buffer))
(save-current-buffer
(while (setq buf (car bufs))
(setq bufs (cdr bufs))
(set-buffer buf)
(when w3m-current-url
(when (eq cbuf (current-buffer))
(setq cnum i))
(setq i (1+ i))
(setq urls (cons (list w3m-current-url
(copy-sequence (caar w3m-history))
(w3m-session-history-to-save)
w3m-current-title)
urls)))))
(when urls
(setq i 2)
(while (setq session (car sessions))
(setq sessions (cdr sessions))
(if (string-match titleregex (nth 0 session))
(when (<= i w3m-session-automatic-keep-number)
(setq tmptitle (format (concat w3m-session-automatic-title
"-%d") i))
(setq tmptime (nth 1 session))
(setq tmpurls (nth 2 session))
(setq tmp (cons (list tmptitle tmptime tmpurls nil) tmp))
(setq i (1+ i)))
(setq tmp (cons session tmp))))
(setq sessions (nreverse tmp))
(setq urls (nreverse urls))
(setq sessions (cons (list title (current-time) urls cnum)
sessions))
(w3m-save-list w3m-session-file sessions)))))))
(defun w3m-session-deleted-save (buffers)
"Save list of deleted session."
(when w3m-session-deleted-save
(w3m-session-ignore-errors
(let ((sessions (w3m-load-list w3m-session-file))
(title (concat w3m-session-deleted-title "-1"))
(titleregex (concat "\\`"
(regexp-quote w3m-session-deleted-title)
"-[0-9]+\\'"))
(bufs (copy-sequence buffers))
(i 2)
urls buf session
tmp tmptitle tmptime tmpurls)
(when bufs
(setq bufs (sort bufs 'w3m-buffer-name-lessp))
(save-current-buffer
(while (setq buf (car bufs))
(setq bufs (cdr bufs))
(set-buffer buf)
(when w3m-current-url
(setq urls (cons (list w3m-current-url
(copy-sequence (caar w3m-history))
(w3m-session-history-to-save)
w3m-current-title)
urls)))))
(when urls
(while (setq session (car sessions))
(setq sessions (cdr sessions))
(if (string-match titleregex (nth 0 session))
(when (<= i w3m-session-deleted-keep-number)
(setq tmptitle (format (concat w3m-session-deleted-title
"-%d") i))
(setq tmptime (nth 1 session))
(setq tmpurls (nth 2 session))
(setq tmp (cons (list tmptitle tmptime tmpurls nil) tmp))
(setq i (1+ i)))
(setq tmp (cons session tmp))))
(setq sessions (nreverse tmp))
(setq urls (nreverse urls))
(setq sessions (cons (list title (current-time) urls nil) sessions))
(w3m-save-list w3m-session-file sessions)))))))
(defun w3m-session-crash-recovery-save ()
"Save list of displayed session."
(when w3m-session-crash-recovery
(w3m-session-ignore-errors
(let ((sessions (w3m-load-list w3m-session-file))
(bufs (w3m-list-buffers))
(title w3m-session-crash-recovery-title)
urls buf tmp)
(when bufs
(save-current-buffer
(while (setq buf (car bufs))
(setq bufs (cdr bufs))
(set-buffer buf)
(when w3m-current-url
(setq urls (cons (list w3m-current-url
(copy-sequence (caar w3m-history))
(w3m-session-history-to-save)
w3m-current-title)
urls)))))
(when urls
(setq urls (nreverse urls))
(setq tmp (assoc title sessions))
(when tmp (setq sessions (delq tmp sessions)))
(setq sessions (cons (list title (current-time) urls nil) sessions))
(w3m-save-list w3m-session-file sessions)))))))
;;;###autoload
(defun w3m-session-crash-recovery-remove ()
"Remove crash recovery session set."
(when w3m-session-crash-recovery
(w3m-session-ignore-errors
(let* ((sessions (w3m-load-list w3m-session-file))
(item (assoc w3m-session-crash-recovery-title sessions)))
(when item
(setq sessions (delq item sessions))
(w3m-save-list w3m-session-file sessions))))))
(defvar w3m-session-select-mode-map nil)
(unless w3m-session-select-mode-map
(let ((map (make-keymap)))
(suppress-keymap map)
(define-key map "q" 'w3m-session-select-quit)
(define-key map "Q" 'w3m-session-select-quit)
(define-key map "\C-g" 'w3m-session-select-quit)
(define-key map "\C-m" 'w3m-session-select-select)
(define-key map "\M-s" 'w3m-session-select-open-session-group)
(define-key map "c" 'w3m-session-select-copy)
(define-key map "C" 'w3m-session-select-copy)
(define-key map "d" 'w3m-session-select-delete)
(define-key map "D" 'w3m-session-select-delete)
(define-key map "s" 'w3m-session-select-save)
(define-key map "S" 'w3m-session-select-save)
(define-key map "r" 'w3m-session-select-rename)
(define-key map "R" 'w3m-session-select-rename)
(define-key map "m" 'w3m-session-select-merge)
(define-key map "M" 'w3m-session-select-merge)
(define-key map "n" 'w3m-select-next-line)
(define-key map "j" 'w3m-select-next-line)
(define-key map "\C-n" 'w3m-select-next-line)
(define-key map [down] 'w3m-select-next-line)
(define-key map "p" 'w3m-select-previous-line)
(define-key map "k" 'w3m-select-previous-line)
(define-key map "\C-p" 'w3m-select-previous-line)
(define-key map [up] 'w3m-select-previous-line)
(setq w3m-session-select-mode-map map)))
;;; Local variables
(defvar w3m-session-select-sessions nil
"Buffer-local copy of session list.")
(make-variable-buffer-local 'w3m-session-select-sessions)
(defun w3m-session-select-mode (&optional sessions)
"Major mode for selecting emacs-w3m session.
\\<w3m-session-select-mode-map>
\\[w3m-session-select-select] Select the session.
\\[w3m-session-select-open-session-group] Open the session group.
\\[w3m-session-select-delete] Delete the session.
\\[w3m-session-select-rename] Rename the session.
\\[w3m-session-select-merge] Merge the session into another one.
\\[w3m-session-select-save] Save the session.
\\[w3m-select-next-line] Move the point to the next session.
\\[w3m-select-previous-line] Move the point to the previous session.
\\[w3m-session-select-quit] Exit selecting session.
"
(w3m-session-ignore-errors
(let ((sessions (or sessions
(w3m-load-list w3m-session-file))))
(buffer-disable-undo)
(setq mode-name "w3m session"
truncate-lines t
buffer-read-only nil
major-mode 'w3m-session-select-mode
w3m-session-select-sessions sessions
buffer-quit-function 'w3m-session-select-quit
buffer-read-only t)
(setq w3m-session-group-open nil)
(use-local-map w3m-session-select-mode-map)
(w3m-session-select-list-all-sessions)
(add-hook 'pre-command-hook 'w3m--session-update-faces t t)
(add-hook 'post-command-hook 'w3m--session-update-faces t t))))
(defun w3m--session-update-faces ()
"A hook function for `w3m-session-select' buffers.
Meant for use with `pre-command-hook' and `post-command-hook'."
(let ((beg (line-beginning-position))
(inhibit-read-only t))
(when (get-text-property beg 'w3m-session-number)
(put-text-property beg (next-single-property-change beg 'w3m-session-number)
'face
(if (equal (get-text-property beg 'face) 'w3m-session-selected)
'w3m-session-select
'w3m-session-selected)))))
(defun w3m-session-select-list-all-sessions ()
"List all saved sessions."
(let ((sessions w3m-session-select-sessions)
(num 0)
(max 0)
(inhibit-read-only t)
title titles time times wid pos)
(if (not sessions)
(progn
(w3m--message t 'w3m-error "No saved session")
(w3m-session-select-quit))
(mapc (lambda (x)
(setq title (format "%s[%d]" (nth 0 x) (length (nth 2 x))))
(setq wid (string-width title))
(when (> wid max)
(setq max wid))
(setq titles (cons title titles))
(setq times (cons (format-time-string w3m-session-time-format
(nth 1 x))
times)))
sessions)
(setq titles (nreverse titles))
(setq times (nreverse times))
(setq max (+ max 2))
(erase-buffer)
(while (and (setq title (car titles))
(setq time (car times)))
(setq titles (cdr titles))
(setq times (cdr times))
(setq pos (point))
(insert title)
(add-text-properties pos (point)
`(face w3m-session-select
w3m-session-number ,num))
(setq num (1+ num))
(insert (make-string (- max (string-width title)) ? ))
(insert time "\n"))
(delete-char -1)
(goto-char (point-min))
(set-buffer-modified-p nil)
(setq buffer-read-only t))))
(defun w3m-session-select-list-session-group (arg)
"List all buffers (i.e., tabs) within a session.
The list can be acted upon similarly to a session list, i.e.,
entries can be individually deleted, renamed, or opened as a new
buffer in the current session."
(let ((session (nth 2 (nth arg w3m-session-select-sessions)))
(num 0)
(max 0)
(inhibit-read-only t)
title url wid
titles urls pos)
(when session
(mapc (lambda (x)
(setq title
(format "%s" (or (nth 3 x) w3m-session-unknown-title)))
(setq wid (string-width title))
(when (> wid max)
(setq max wid))
(setq titles (cons title titles))
(setq urls (cons (nth 0 x)
urls)))
session)
(setq titles (nreverse titles))
(setq urls (nreverse urls))
(setq max (+ max 2))
(erase-buffer)
(setq pos (point))
(insert ">> Open *ALL* of the sessions listed below! <<")
(add-text-properties pos (point)
`(face w3m-session-selected
w3m-session-number ,arg))
(insert "\n")
(while (and (setq title (car titles))
(setq url (car urls)))
(setq titles (cdr titles))
(setq urls (cdr urls))
(setq pos (point))
(insert title)
(add-text-properties pos (point)
`(face w3m-session-select
w3m-session-number ,(cons arg num)))
(setq num (1+ num))
(insert (make-string (- max (string-width title)) ? ))
(insert url "\n"))
(delete-char -1)
(goto-char (point-min))
(w3m--session-update-faces))
(set-buffer-modified-p nil)
(setq buffer-read-only t)))
(defun w3m-session-select-quit ()
"Exit from w3m session select mode."
(interactive)
(if w3m-session-group-open
(let ((num w3m-session-group-open))
(setq w3m-session-group-open nil)
(w3m-session-select-list-all-sessions)
(forward-line num))
(let ((buffer (current-buffer)))
(or (one-window-p) (delete-window))
(kill-buffer buffer))))
(defun w3m-session-select-select ()
"Select the session."
(interactive)
(beginning-of-line)
(let* ((num (get-text-property
(point) 'w3m-session-number))
(item (if (consp num)
(nth (cdr num)
(caddr (nth (car num)
w3m-session-select-sessions)))
(nth num w3m-session-select-sessions)))
(session (if (consp num)
(list (or (cadddr item) w3m-session-unknown-title)
nil
(list item)
nil)
item)))
(w3m-session-goto-session session)))
(defun w3m-session-select-open-session-group (&optional arg)
"Open the session group."
(interactive)
(let ((num (or arg (get-text-property (point-at-bol) 'w3m-session-number)))
wheight)
(if (consp num)
(w3m--message t 'w3m-error "This is not a session group.")
(setq w3m-session-group-open num)
(setq wheight
(max (+ (length (caddr (nth num w3m-session-select-sessions))) 6)
window-min-height))
(condition-case nil
(enlarge-window (- wheight (window-height)))
(error nil))
(w3m-session-select-list-session-group num))))
(defun w3m-session-select-save ()
"Save the session."
(interactive)
(when (y-or-n-p "Save this session? ")
(w3m-session-select-quit)
(w3m-session-save)
(w3m-session-select)))
(defun w3m-session-select-rename ()
"Rename this session."
(interactive)
(beginning-of-line)
(let ((num (get-text-property
(point) 'w3m-session-number))
(sessions w3m-session-select-sessions))
(w3m-session-rename sessions num)
(if (not w3m-session-group-open)
(w3m-session-select num)
(w3m-session-select-open-session-group w3m-session-group-open))))
(defun w3m-session-select-delete ()
"Delete an entry (either a session or a buffer)."
(interactive)
(when (y-or-n-p "Delete this entry? ")
(beginning-of-line)
(let ((num (get-text-property
(point) 'w3m-session-number))
(sessions w3m-session-select-sessions))
(w3m-session-delete sessions num)
;;(w3m-session-select)
;;(forward-line (min num (- (line-number-at-pos (point-max)) 4))))))
(if (not w3m-session-group-open)
(w3m-session-select (min
(if (integerp num) num (car num))
(1- (length sessions))))
(w3m-session-select-open-session-group w3m-session-group-open)
(forward-line (min (1+ (cdr num))))))))
(defun w3m-session-select-copy ()
"Copy the currently selected session."
(interactive)
(beginning-of-line)
(let ((sessions w3m-session-select-sessions)
(default-prompt "Name for new session: ")
(source-number (get-text-property (point) 'w3m-session-number))
prompt source-session target-session otitle title)
(setq prompt default-prompt)
(if (not (integerp source-number))
(error "Only for sessions, not their elements.")
(setq source-session (nth source-number sessions))
(setq target-session source-session))
(setq otitle (car source-session))
;; BEGIN: Code duplicated in function `w3m-session-rename'
(while (not title)
;; A devious way to emulate INITIAL-INPUT that is deprecated.
(let ((minibuffer-setup-hook (lambda nil (insert otitle))))
(setq title (read-from-minibuffer prompt nil nil nil nil otitle)))
(cond
((string= title "")
(setq title nil
prompt default-prompt))
((string= title otitle)
(setq prompt (concat title
" is same as original title (C-g to abort): ")
title nil))
((assoc title sessions)
(if (not (y-or-n-p (format "\"%s\" exists. Overwrite? " title)))
(setq prompt default-prompt
title nil)
(setq sessions (delq (assoc title sessions) sessions))))))
;; END: Code duplicated in function `w3m-session-rename'
(setq sessions (cons (list title
(current-time)
(nth 2 source-session)
(nth 3 source-session))
sessions))
(w3m-save-list w3m-session-file sessions)
(w3m--message t t "Session %s copied to %s." otitle title)
(when (and (setq buf (get-buffer " *w3m-session select*"))
(get-buffer-window buf 'visible))
(save-selected-window (w3m-session-select)))))
(defun w3m-session-select-merge ()
"Copy the elements of the selected session into another one.
The user will be prompted for the receiving session. If point is
on a single element within a session, then only that element will
be copied."
(interactive)
(beginning-of-line)
(let ((sessions w3m-session-select-sessions)
(prompt "Merge into session: ")
(source-number (get-text-property (point) 'w3m-session-number))
source-session source-element source-time titles target)
(if (integerp source-number)
(setq source-session (nth source-number sessions))
(setq source-session (nth (car source-number) sessions))
(setq source-element (nth (cdr source-session) (nth 2 source-session))))
(mapc (lambda (x) (push (car x) titles))
sessions)
(setq titles
(delete
(car source-session)
titles))
(setq target (assoc (completing-read prompt titles nil t) sessions))
(setq source-time (nth 1 source-session))
(when (time-less-p (nth 1 target) source-time)
(setf (nth 1 target) source-time))
(setf (nth 2 target)
(delete-dups ;; This will allow multiple entries for the same
;; URL, but with different details, eg. form selections and
;; cursor positions. It may be better to delete more broadly,
;; any entry with a duplicate URL.
(nconc (nth 2 target)
(or source-element
(nth 2 source-session)))))
(w3m-save-list w3m-session-file sessions)
(if (not w3m-session-group-open)
(w3m-session-select (min source-number (1- (length sessions))))
(w3m-session-select-open-session-group w3m-session-group-open)
(forward-line (min (cdr source-number)
(- (line-number-at-pos (point-max)) 4))))))
;;;###autoload
(defun w3m-session-select (&optional n toggle nomsg)
"Select session from session list.
Position point at N-th session if N is given. With the
prefix-argument, toggles the position of the popup window between
being below or beside the main window."
(interactive (list nil current-prefix-arg nil))
(w3m-session-ignore-errors
(let ((sessions (w3m-load-list w3m-session-file))
(showbuf " *w3m-session select*")
window)
(if sessions
(progn
(w3m--setup-popup-window toggle showbuf nomsg)
(w3m-session-select-mode sessions)
(when n (w3m-select-next-line n)))
;; else, ie. (not sessions)
(when (setq showbuf (get-buffer showbuf))
(when (setq window (prog1 (get-buffer-window showbuf t)
(kill-buffer showbuf)))
(save-selected-window
(select-window window)
(or (one-window-p t t) (delete-window window)))))
(w3m--message t 'w3m-error "No saved session")))))
(defun w3m-session-goto-session (session)
"Create buffer(s) for the selected SESSION url(s).
If point is selecting a session, then a buffer will be created for each
element (url) of that session that does not already exist. If point is
selecting a session element, then only a single buffer for that
url will be created, only if it does not already exist."
(let ((title (nth 0 session))
(urls (nth 2 session))
(cnum (nth 3 session))
(i 0)
(session-buf (current-buffer))
(session-win (selected-window))
(w3m-urls ; checking for duplicates
(mapcar (lambda(x)
(with-current-buffer x
(cons w3m-current-url x)))
(w3m-list-buffers)))
url cbuf cwin buf pos history url-title)
(dolist (win (window-list))
(when (string-match "\\*w3m.*\\*" (buffer-name (window-buffer win)))
(setq cwin win)))
(when (not cwin)
(error "No visible w3m windows found."))
(with-selected-window cwin
(w3m--message t t "Session goto(%s)..." title)
(while (setq url (pop urls))
(unless (stringp url)
(setq pos (nth 1 url)
history (nth 2 url)
url-title (nth 3 url)
url (nth 0 url)))
(cond
((setq cbuf (cdr (assoc url w3m-urls))) t)
(t ; ie. (not (assoc url w3m-urls))
(w3m-goto-url-new-session url nil nil nil nil t) ; no-popup
(setq buf (car (last (w3m-list-buffers))))
(when (or (and (numberp cnum) (= cnum i))
(and (not cnum) (= i 0)))
(setq cbuf buf))
(when (and buf pos history)
(set-buffer buf)
(push (list url (list :title url-title) pos) history) ;current
(setq w3m-history-flat history)
(w3m-history-tree pos))
(setq i (1+ i))))))
(set-window-buffer session-win session-buf)
(when cbuf
(set-window-buffer cwin cbuf))
(w3m--message t t "Session goto(%s)...done" title)))
(defun w3m-session-rename (sessions num)
"Rename an entry (either a session or a buffer).
Rename session number NUM of the SESSIONS data structure, when
NUM is an integer. NUM may also be a cons cell, for which the car
is a session number and the cdr is a buffer entry (i.e., a tab)
within that session. In that case rename the buffer entry."
(let* ((default-prompt "Enter new session title (C-g to abort): ")
(prompt default-prompt)
overwrite
title
(group (if (consp num) (nth 2 (nth (car num) sessions)) nil))
(tmp (if group (nth (cdr num) group) (nth num sessions)))
(otitle (if (consp num) (nth 2 (cdr tmp)) (car tmp))))
; BEGIN: Code duplicated in function `w3m-session-copy'
(while (not title)
;; A devious way to emulate INITIAL-INPUT that is deprecated.
(let ((minibuffer-setup-hook (lambda nil (insert otitle))))
(setq title (read-from-minibuffer prompt nil nil nil nil otitle)))
(cond
((string= title "")
(setq title nil
prompt default-prompt))
((string= title otitle)
(setq prompt (concat title
" is same as original title (C-g to abort): ")
title nil))
((and (not group) (assoc title sessions))
(if (not (y-or-n-p (format "\"%s\" exists. Overwrite? " title)))
(setq prompt default-prompt
title nil)
(setq sessions (delq (assoc title sessions) sessions))
(setq num (seq-position sessions (assoc otitle sessions)))))
((and group (member title (mapcar (lambda (x) (car (last x))) group)))
;; handle *buffer* rename (overwrite existing)
;; within a session ("session-group")
(setq prompt "\
Not yet supported. Manually delete the other entry, or try again. "
title nil))))
;; END: Code duplicated in function `w3m-session-copy'
;; in this case, wrapper must decrement its copy of num
;; BB_2018-02-15: I don't understand that comment
(cond
(group ;; handle *buffer* rename within a session ("session-group")
(setf (nth 2 (cdr tmp)) title)
(setf (nth (cdr num) group) tmp)
(setf (nth 2 (nth (car num) sessions)) group))
;; BB_2018-02-15: The good news is that this seems to be working;
;; the bad news is that an examination of the .sessions file
;; reveals a format difference, in that the original buffer name
;; was encoded with text properties, like so:
;; #("w3m_home_page.html" 0 1 (idx 0))
;; and the replacement is just a string. The text property may
;; just be cruft for the purpose of this file, but I'm not sure.
(t
(setcar tmp title)
(setcar (nthcdr num sessions) tmp)))
(w3m-save-list w3m-session-file sessions)))
(defun w3m-session-delete (sessions num)
"Delete an entry (either a session or a buffer).
Delete from the SESSIONS data structure the session number NUM,
when NUM is an integer. NUM may also be a cons cell, for which
the car is a session number and the cdr is a buffer entry (i.e.,
a tab) within that session. In that case delete the buffer
entry."
(if (integerp num)
(setq sessions (delq (nth num sessions) sessions))
(let* ((item (nth 2 (nth (car num) sessions)))
(tmp (delq (nth (cdr num) item) item)))
(if (not (zerop (length tmp)))
(setf (nth 2 (nth (car num) sessions)) tmp)
(setq sessions (delq (nth (car num) sessions) sessions))
(setq w3m-session-group-open nil))))
(if sessions
(w3m-save-list w3m-session-file sessions)
(let ((file (expand-file-name w3m-session-file)))
(when (and (file-exists-p file) (file-writable-p file))
(delete-file file)))))
(defvar w3m-session-menu-items
`([,(w3m-make-menu-item "新しいセッションを作る..."
"Create New Session...")
w3m-goto-new-session-url t]
[,(w3m-make-menu-item "このセッションを複製する" "Copy This Session")
w3m-copy-buffer w3m-current-url]
"----" ;; separator
[,(w3m-make-menu-item "前のセッションに移動する"
"Move Previous Session")
w3m-previous-buffer
(> (safe-length (w3m-list-buffers)) 1)]
[,(w3m-make-menu-item "次のセッションに移動する" "Move Next Session")
w3m-next-buffer
(> (safe-length (w3m-list-buffers)) 1)]
"----" ;; separator
[,(w3m-make-menu-item "このセッションを閉じる" "Close This Session")
w3m-delete-buffer
(> (safe-length (w3m-list-buffers)) 1)]
[,(w3m-make-menu-item "他のセッションを閉じる" "Close Other Sessions")
w3m-delete-other-buffers
(> (safe-length (w3m-list-buffers)) 1)]
[,(w3m-make-menu-item "現在のセッションを保存する"
"Save Displayed Sessions")
w3m-session-save t]
[,(w3m-make-menu-item "セッションを選択する" "Select Sessions")
w3m-session-select t])
"List of the session menu items.")
;;;###autoload
(defun w3m-setup-session-menu ()
"Setup w3m session items in menubar."
(unless (lookup-key w3m-mode-map [menu-bar Session])
(easy-menu-define w3m-session-menu w3m-mode-map "" '("Session"))
(easy-menu-add w3m-session-menu)
(add-hook 'menu-bar-update-hook 'w3m-session-menubar-update)))
(defvar w3m-session-menu-items-pre nil)
(defvar w3m-session-menu-items-time nil)
(defun w3m-session-menubar-update ()
"Update w3m session menubar."
(when (and (eq major-mode 'w3m-mode) menu-bar-mode)
(let ((items w3m-session-menu-items)
(pages (w3m-session-make-menu-items)))
(easy-menu-define w3m-session-menu w3m-mode-map
"The menu kepmap for the emacs-w3m session."
(cons "Session" (if pages