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;;; mime-play.el --- Playback processing module for mime-view.el
;; Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003,
;; 2004, 2010 Free Software Foundation, Inc.
;; Author: MORIOKA Tomohiko <tomo@m17n.org>
;; Created: 1995/9/26 (separated from tm-view.el)
;; Renamed: 1997/2/21 from tm-play.el
;; Keywords: MIME, multimedia, mail, news
;; This file is part of SEMI (Secretariat of Emacs MIME Interfaces).
;; 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 GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Code:
(require 'mime-view)
(require 'alist)
(require 'filename)
(eval-when-compile
(unless (require 'bbdb nil t)
(defvar bbdb-buffer-name nil)))
(defcustom mime-save-directory "~/"
"*Name of the directory where MIME entity will be saved in.
If t, it means current directory."
:group 'mime-view
:type '(choice (const :tag "Current directory" t)
(directory)))
(defcustom mime-play-delete-file-immediately t
"If non-nil, delete played file immediately."
:group 'mime-view
:type 'boolean)
(defvar mime-play-find-every-situations t
"*Find every available situations if non-nil.")
(defvar mime-play-messages-coding-system nil
"Coding system to be used for external MIME playback method.")
;;; @ content decoder
;;;
;;;###autoload
(defun mime-preview-play-current-entity (&optional ignore-examples mode)
"Play current entity.
It decodes current entity to call internal or external method. The
method is selected from variable `mime-acting-condition'.
If IGNORE-EXAMPLES (C-u prefix) is specified, this function ignores
`mime-acting-situation-example-list'.
If MODE is specified, play as it. Default MODE is \"play\"."
(interactive "P")
(let ((entity (get-text-property (point) 'mime-view-entity)))
(if entity
(let ((situation
(get-text-property (point) 'mime-view-situation)))
(or mode
(setq mode "play"))
(setq situation
(if (assq 'mode situation)
(put-alist 'mode mode (copy-alist situation))
(cons (cons 'mode mode)
situation)))
(if ignore-examples
(setq situation
(cons (cons 'ignore-examples ignore-examples)
situation)))
(mime-play-entity entity situation)
))))
;;;###autoload
(defun mime-play-entity (entity &optional situation ignored-method)
"Play entity specified by ENTITY.
It decodes the entity to call internal or external method. The method
is selected from variable `mime-acting-condition'. If MODE is
specified, play as it. Default MODE is \"play\"."
(let ((ret
(mime-unify-situations (mime-entity-situation entity situation)
mime-acting-condition
mime-acting-situation-example-list
'method ignored-method
mime-play-find-every-situations))
method)
(setq mime-acting-situation-example-list (cdr ret)
ret (car ret))
(cond ((cdr ret)
(setq ret (mime-select-menu-alist
"Methods"
(mapcar (function
(lambda (situation)
(cons
(format "%s"
(cdr (assq 'method situation)))
situation)))
ret)))
(setq ret (mime-sort-situation ret))
(add-to-list 'mime-acting-situation-example-list (cons ret 0))
)
(t
(setq ret (car ret))
))
(setq method (cdr (assq 'method ret)))
(cond ((and (symbolp method)
(fboundp method))
(funcall method entity ret)
)
((stringp method)
(mime-activate-mailcap-method entity ret)
)
;; ((and (listp method)(stringp (car method)))
;; (mime-activate-external-method entity ret)
;; )
(t
(mime-show-echo-buffer "No method are specified for %s\n"
(mime-type/subtype-string
(cdr (assq 'type situation))
(cdr (assq 'subtype situation))))
(if (y-or-n-p "Do you want to save current entity to disk?")
(mime-save-content entity situation))
))
))
;;; @ external decoder
;;;
(defvar mime-mailcap-method-filename-alist nil)
(defun mime-activate-mailcap-method (entity situation)
(let ((method (cdr (assoc 'method situation)))
(name (mime-entity-safe-filename entity)))
(setq name (expand-file-name (if (and name (not (string= name "")))
name
(make-temp-name "EMI"))
(make-temp-file "EMI" 'directory)))
(mime-write-entity-content entity name)
(message "External method is starting...")
(let ((process
(let ((command
(mime-format-mailcap-command
method
(cons (cons 'filename name) situation)))
(coding-system-for-read mime-play-messages-coding-system)
process-connection-type)
(start-process command mime-echo-buffer-name
shell-file-name shell-command-switch command))))
(set-alist 'mime-mailcap-method-filename-alist process name)
(set-process-sentinel process 'mime-mailcap-method-sentinel))))
(defun mime-mailcap-method-sentinel (process event)
(when mime-play-delete-file-immediately
(let ((file (cdr (assq process mime-mailcap-method-filename-alist))))
(when (file-exists-p file)
(ignore-errors
(delete-file file)
(delete-directory (file-name-directory file)))))
(remove-alist 'mime-mailcap-method-filename-alist process))
(message "%s %s" process event))
(defun mime-mailcap-delete-played-files ()
(dolist (elem mime-mailcap-method-filename-alist)
(when (file-exists-p (cdr elem))
(ignore-errors
(delete-file (cdr elem))
(delete-directory (file-name-directory (cdr elem)))))))
(add-hook 'kill-emacs-hook 'mime-mailcap-delete-played-files)
(defvar mime-echo-window-is-shared-with-bbdb
(module-installed-p 'bbdb)
"*If non-nil, mime-echo window is shared with BBDB window.")
(defvar mime-echo-window-height
(function
(lambda ()
(/ (window-height) 5)
))
"*Size of mime-echo window.
It allows function or integer. If it is function,
`mime-show-echo-buffer' calls it to get height of mime-echo window.
Otherwise `mime-show-echo-buffer' uses it as height of mime-echo
window.")
(defun mime-show-echo-buffer (&rest forms)
"Show mime-echo buffer to display MIME-playing information."
(get-buffer-create mime-echo-buffer-name)
(let ((the-win (selected-window))
(win (get-buffer-window mime-echo-buffer-name)))
(unless win
(unless (and mime-echo-window-is-shared-with-bbdb
(condition-case nil
(setq win (get-buffer-window bbdb-buffer-name))
(error nil)))
(select-window (get-buffer-window (or mime-preview-buffer
(current-buffer))))
(setq win (split-window-vertically
(- (window-height)
(if (functionp mime-echo-window-height)
(funcall mime-echo-window-height)
mime-echo-window-height)
)))
)
(set-window-buffer win mime-echo-buffer-name)
)
(select-window win)
(goto-char (point-max))
(if forms
(let ((buffer-read-only nil))
(insert (apply (function format) forms))
))
(select-window the-win)
))
;;; @ file name
;;;
(defvar mime-view-file-name-char-regexp "[A-Za-z0-9+_-]")
(defvar mime-view-file-name-regexp-1
(concat mime-view-file-name-char-regexp "+\\."
mime-view-file-name-char-regexp "+"))
(defvar mime-view-file-name-regexp-2
(concat (regexp-* mime-view-file-name-char-regexp)
"\\(\\." mime-view-file-name-char-regexp "+\\)*"))
(defun mime-entity-safe-filename (entity)
(let ((filename
(or (mime-entity-filename entity)
(let ((subj
(or (mime-entity-read-field entity 'Content-Description)
(mime-entity-read-field entity 'Subject))))
(if (and subj
(or (string-match mime-view-file-name-regexp-1 subj)
(string-match mime-view-file-name-regexp-2 subj)))
(substring subj (match-beginning 0)(match-end 0))
)))))
(if filename
(replace-as-filename filename)
)))
;;; @ file extraction
;;;
(defun mime-save-content (entity situation)
(let ((name (or (mime-entity-safe-filename entity)
(format "%s" (mime-entity-media-type entity))))
(dir (if (eq t mime-save-directory)
default-directory
mime-save-directory))
filename)
(setq filename (read-file-name
(concat "File name: (default "
(file-name-nondirectory name) ") ")
dir
(concat (file-name-as-directory dir)
(file-name-nondirectory name))))
(if (file-directory-p filename)
(setq filename (concat (file-name-as-directory filename)
(file-name-nondirectory name))))
(if (file-exists-p filename)
(or (yes-or-no-p (format "File %s exists. Save anyway? " filename))
(error "")))
(mime-write-entity-content entity (expand-file-name filename))
filename))
;;; @ file detection
;;;
(defvar mime-magic-type-alist
'(("^\377\330\377[\340\356]..JFIF" image jpeg)
("^\211PNG" image png)
("^GIF8[79]" image gif)
("^II\\*\000" image tiff)
("^MM\000\\*" image tiff)
("^MThd" audio midi)
("^\000\000\001\263" video mpeg)
)
"*Alist of regexp about magic-number vs. corresponding media-types.
Each element looks like (REGEXP TYPE SUBTYPE).
REGEXP is a regular expression to match against the beginning of the
content of entity.
TYPE is symbol to indicate primary type of media-type.
SUBTYPE is symbol to indicate subtype of media-type.")
(defun mime-detect-content (entity situation)
(let (type subtype)
(let ((mdata (mime-entity-content entity))
(rest mime-magic-type-alist))
(while (not (let ((cell (car rest)))
(if cell
(if (string-match (car cell) mdata)
(setq type (nth 1 cell)
subtype (nth 2 cell))
)
t)))
(setq rest (cdr rest))))
(setq situation (del-alist 'method (copy-alist situation)))
(mime-play-entity entity
(if type
(put-alist 'type type
(put-alist 'subtype subtype
situation))
situation)
'mime-detect-content)))
;;; @ mail/news message
;;;
(defun mime-preview-quitting-method-for-mime-show-message-mode ()
"Quitting method for mime-view.
It is registered to variable `mime-preview-quitting-method-alist'."
(let ((mother mime-mother-buffer)
(win-conf mime-preview-original-window-configuration))
(if (buffer-live-p mime-view-temp-message-buffer)
(kill-buffer mime-view-temp-message-buffer))
(mime-preview-kill-buffer)
(set-window-configuration win-conf)
(pop-to-buffer mother)))
(defun mime-view-message/rfc822 (entity situation)
(let* ((new-name
(format "%s-%s" (buffer-name) (mime-entity-number entity)))
(mother (current-buffer))
(children (car (mime-entity-children entity)))
(preview-buffer
(mime-display-message
children new-name mother nil
(cdr (assq 'major-mode
(get-text-property (point) 'mime-view-situation))))))
(or (get-buffer-window preview-buffer)
(let ((m-win (get-buffer-window mother)))
(if m-win
(set-window-buffer m-win preview-buffer)
(switch-to-buffer preview-buffer)
)))))
;;; @ message/partial
;;;
(defun mime-require-safe-directory (dir)
"Create a directory DIR safely.
The permission of the created directory becomes `700' (for the owner only).
If the directory already exists and is writable by other users, an error
occurs."
(let ((attr (file-attributes dir))
(orig-modes (default-file-modes)))
(if (and attr (eq (car attr) t)) ; directory already exists.
(unless (or (memq system-type '(windows-nt ms-dos OS/2 emx))
(and (eq (nth 2 attr) (user-real-uid))
(eq (file-modes dir) 448)))
(error "Invalid owner or permission for %s" dir))
(unwind-protect
(progn
(set-default-file-modes 448)
(make-directory dir))
(set-default-file-modes orig-modes)))))
(defvar mime-view-temp-message-buffer nil) ; buffer local variable
(defun mime-store-message/partial-piece (entity cal)
(let ((root-dir
(expand-file-name
(concat "m-prts-" (user-login-name)) temporary-file-directory))
(id (cdr (assoc "id" cal)))
(number (cdr (assoc "number" cal)))
(total (cdr (assoc "total" cal)))
file
(mother (current-buffer))
(orig-modes (default-file-modes)))
(mime-require-safe-directory root-dir)
(or (file-exists-p root-dir)
(unwind-protect
(progn
(set-default-file-modes 448)
(make-directory root-dir))
(set-default-file-modes orig-modes)))
(setq id (replace-as-filename id))
(setq root-dir (concat root-dir "/" id))
(or (file-exists-p root-dir)
(unwind-protect
(progn
(set-default-file-modes 448)
(make-directory root-dir))
(set-default-file-modes orig-modes)))
(setq file (concat root-dir "/FULL"))
(if (file-exists-p file)
(let ((full-buf (get-buffer-create "FULL"))
(pwin (or (get-buffer-window mother)
(get-largest-window)))
pbuf)
(save-window-excursion
(set-buffer full-buf)
(erase-buffer)
(binary-insert-encoded-file file)
(setq major-mode 'mime-show-message-mode)
(mime-view-buffer (current-buffer) nil mother)
(setq pbuf (current-buffer))
(make-local-variable 'mime-view-temp-message-buffer)
(setq mime-view-temp-message-buffer full-buf))
(set-window-buffer pwin pbuf)
(select-window pwin))
(setq file (concat root-dir "/" number))
(mime-write-entity-body entity file)
(let ((total-file (concat root-dir "/CT")))
(setq total
(if total
(progn
(or (file-exists-p total-file)
(with-current-buffer
(get-buffer-create mime-temp-buffer-name)
(erase-buffer)
(insert total)
(write-region (point-min)(point-max) total-file)
(kill-buffer (current-buffer))
))
(string-to-number total)
)
(and (file-exists-p total-file)
(with-current-buffer (find-file-noselect total-file)
(prog1
(and (re-search-forward "[0-9]+" nil t)
(string-to-number
(buffer-substring (match-beginning 0)
(match-end 0)))
)
(kill-buffer (current-buffer))
)))
)))
(if (and total (> total 0)
(>= (length (directory-files root-dir nil "^[0-9]+$" t))
total))
(catch 'tag
(with-current-buffer (get-buffer-create mime-temp-buffer-name)
(let ((full-buf (current-buffer)))
(erase-buffer)
(let ((i 1))
(while (<= i total)
(setq file (concat root-dir "/" (int-to-string i)))
(or (file-exists-p file)
(throw 'tag nil)
)
(binary-insert-encoded-file file)
(goto-char (point-max))
(setq i (1+ i))))
(binary-write-decoded-region
(point-min)(point-max)
(expand-file-name "FULL" root-dir))
(let ((i 1))
(while (<= i total)
(let ((file (format "%s/%d" root-dir i)))
(and (file-exists-p file)
(delete-file file)))
(setq i (1+ i))))
(let ((file (expand-file-name "CT" root-dir)))
(and (file-exists-p file)
(delete-file file)))
(let ((buf (current-buffer))
(pwin (or (get-buffer-window mother)
(get-largest-window)))
(pbuf (mime-display-message
(mime-open-entity 'buffer (current-buffer))
nil mother nil 'mime-show-message-mode)))
(with-current-buffer pbuf
(make-local-variable 'mime-view-temp-message-buffer)
(setq mime-view-temp-message-buffer buf))
(set-window-buffer pwin pbuf)
(select-window pwin)
)))))
)))
;;; @ message/external-body
;;;
(defvar mime-raw-dired-function
(if (and (>= emacs-major-version 19) window-system)
(function dired-other-frame)
(function mime-raw-dired-function-for-one-frame)
))
(defun mime-raw-dired-function-for-one-frame (dir)
(let ((win (or (get-buffer-window mime-preview-buffer)
(get-largest-window))))
(select-window win)
(dired dir)
))
(defun mime-view-message/external-anon-ftp (entity cal)
(let* ((site (cdr (assoc "site" cal)))
(directory (cdr (assoc "directory" cal)))
(name (cdr (assoc "name" cal)))
(pathname (concat "/anonymous@" site ":" directory)))
(message "%s" (concat "Accessing " (expand-file-name name pathname) "..."))
(funcall mime-raw-dired-function pathname)
(goto-char (point-min))
(search-forward name)
))
(defvar mime-raw-browse-url-function mime-browse-url-function)
(defun mime-view-message/external-url (entity cal)
(let ((url (cdr (assoc "url" cal))))
(message "%s" (concat "Accessing " url "..."))
(funcall mime-raw-browse-url-function url)))
;;; @ rot13-47
;;;
(defun mime-view-caesar (entity situation)
"Internal method for mime-view to display ROT13-47-48 message."
(let ((buf (get-buffer-create
(format "%s-%s" (buffer-name) (mime-entity-number entity)))))
(with-current-buffer buf
(setq buffer-read-only nil)
(erase-buffer)
(mime-insert-text-content entity)
(mule-caesar-region (point-min) (point-max))
(set-buffer-modified-p nil)
)
(let ((win (get-buffer-window (current-buffer))))
(or (eq (selected-window) win)
(select-window (or win (get-largest-window)))
))
(view-buffer buf)
(goto-char (point-min))
))
;;; @ end
;;;
(provide 'mime-play)
;;; mime-play.el ends here
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