1 ;;; mime-view.el --- interactive MIME viewer for GNU Emacs
3 ;; Copyright (C) 1995,96,97,98,99,2000 Free Software Foundation, Inc.
5 ;; Author: MORIOKA Tomohiko <tomo@m17n.org>
7 ;; Renamed: 1994/08/31 from tm-body.el
8 ;; Renamed: 1997/02/19 from tm-view.el
9 ;; Keywords: MIME, multimedia, mail, news
11 ;; This file is part of SEMI (Sample of Elastic MIME Interfaces).
13 ;; This program is free software; you can redistribute it and/or
14 ;; modify it under the terms of the GNU General Public License as
15 ;; published by the Free Software Foundation; either version 2, or (at
16 ;; your option) any later version.
18 ;; This program is distributed in the hope that it will be useful, but
19 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 ;; General Public License for more details.
23 ;; You should have received a copy of the GNU General Public License
24 ;; along with GNU Emacs; see the file COPYING. If not, write to the
25 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
26 ;; Boston, MA 02110-1301, USA.
37 (eval-when-compile (require 'static))
43 (defconst mime-view-version
44 (concat (mime-product-name mime-user-interface-product) " MIME-View "
45 (mapconcat #'number-to-string
46 (mime-product-version mime-user-interface-product) ".")
47 " (" (mime-product-code-name mime-user-interface-product) ")"))
53 (defgroup mime-view nil
57 (defcustom mime-situation-examples-file "~/.mime-example"
58 "*File name of situation-examples demonstrated by user."
62 (defcustom mime-preview-move-scroll nil
63 "*Decides whether to scroll when moving to next entity.
64 When t, scroll the buffer. Non-nil but not t means scroll when
65 the next entity is within next-screen-context-lines from top or
66 buttom. Nil means don't scroll at all."
68 :type '(choice (const :tag "Off" nil)
70 (sexp :tag "Situation" 1)))
72 (defcustom mime-view-mailcap-files
73 (let ((files '("/etc/mailcap" "/usr/etc/mailcap" "~/.mailcap")))
74 (or (member mime-mailcap-file files)
75 (setq files (cons mime-mailcap-file files)))
77 "List of mailcap files."
81 (defvar mime-view-automatic-conversion 'undecided)
84 ;;; @ in raw-buffer (representation space)
87 (defvar mime-preview-buffer nil
88 "MIME-preview buffer corresponding with the (raw) buffer.")
89 (make-variable-buffer-local 'mime-preview-buffer)
92 (defvar mime-raw-representation-type-alist
93 '((mime-show-message-mode . binary)
94 (mime-temp-message-mode . binary)
96 "Alist of major-mode vs. representation-type of mime-raw-buffer.
97 Each element looks like (SYMBOL . REPRESENTATION-TYPE). SYMBOL is
98 major-mode or t. t means default. REPRESENTATION-TYPE must be
99 `binary' or `cooked'.")
102 ;;; @ in preview-buffer (presentation space)
105 (defvar mime-mother-buffer nil
106 "Mother buffer corresponding with the (MIME-preview) buffer.
107 If current MIME-preview buffer is generated by other buffer, such as
108 message/partial, it is called `mother-buffer'.")
109 (make-variable-buffer-local 'mime-mother-buffer)
111 ;; (defvar mime-raw-buffer nil
112 ;; "Raw buffer corresponding with the (MIME-preview) buffer.")
113 ;; (make-variable-buffer-local 'mime-raw-buffer)
115 (defvar mime-preview-original-window-configuration nil
116 "Window-configuration before mime-view-mode is called.")
117 (make-variable-buffer-local 'mime-preview-original-window-configuration)
119 (defun mime-preview-original-major-mode (&optional recursive point)
120 "Return major-mode of original buffer.
121 If optional argument RECURSIVE is non-nil and current buffer has
122 mime-mother-buffer, it returns original major-mode of the
124 (if (and recursive mime-mother-buffer)
126 (set-buffer mime-mother-buffer)
127 (mime-preview-original-major-mode recursive))
128 (cdr (assq 'major-mode
129 (get-text-property (or point
130 (if (> (point) (buffer-size))
131 (max (1- (point-max)) (point-min))
133 'mime-view-situation)))))
136 ;;; @ entity information
139 (defun mime-entity-situation (entity &optional situation)
140 "Return situation of ENTITY."
141 (let (rest param name)
143 (unless (assq 'type situation)
144 (setq rest (or (mime-entity-content-type entity)
145 (make-mime-content-type 'text 'plain))
146 situation (cons (car rest) situation)
148 (unless (assq 'subtype situation)
150 (setq rest (or (cdr (mime-entity-content-type entity))
151 '((subtype . plain)))))
152 (setq situation (cons (car rest) situation)
155 (setq param (car rest))
156 (or (assoc (car param) situation)
157 (setq situation (cons param situation)))
158 (setq rest (cdr rest)))
160 ;; Content-Disposition
162 (unless (assq 'disposition-type situation)
163 (setq rest (mime-entity-content-disposition entity))
165 (setq situation (cons (cons 'disposition-type
166 (mime-content-disposition-type rest))
168 rest (mime-content-disposition-parameters rest))))
170 (setq param (car rest)
172 (if (cond ((string= name "filename")
173 (if (assq 'filename situation)
175 (setq name 'filename)))
176 ((string= name "creation-date")
177 (if (assq 'creation-date situation)
179 (setq name 'creation-date)))
180 ((string= name "modification-date")
181 (if (assq 'modification-date situation)
183 (setq name 'modification-date)))
184 ((string= name "read-date")
185 (if (assq 'read-date situation)
187 (setq name 'read-date)))
188 ((string= name "size")
189 (if (assq 'size situation)
192 (t (setq name (cons 'disposition name))
193 (if (assoc name situation)
197 (cons (cons name (cdr param))
199 (setq rest (cdr rest)))
201 ;; Content-Transfer-Encoding
202 (or (assq 'encoding situation)
204 (cons (cons 'encoding (or (mime-entity-encoding entity)
210 (defsubst mime-delq-null-situation (situations field
211 &rest ignored-values)
214 (let* ((situation (car situations))
215 (cell (assq field situation)))
217 (or (memq (cdr cell) ignored-values)
218 (setq dest (cons situation dest)))))
219 (setq situations (cdr situations)))
222 (defun mime-compare-situation-with-example (situation example)
223 (let ((example (copy-alist example))
226 (let* ((cell (car situation))
228 (ecell (assoc key example)))
230 (if (equal cell ecell)
231 (setq match (1+ match))
232 (setq example (delq ecell example)))))
233 (setq situation (cdr situation)))
234 (cons match example)))
236 (defun mime-sort-situation (situation)
246 (disposition-type . 6)))
249 (let ((ret (assq a-t order)))
251 (setq a-order (cdr ret))
255 (let ((ret (assq b-t order)))
257 (setq b-order (cdr ret))
260 (if (= a-order b-order)
261 (string< (format "%s" a-t)(format "%s" b-t))
262 (< a-order b-order))))))
264 (defun mime-unify-situations (entity-situation
265 condition situation-examples
266 &optional required-name ignored-value
269 (in-calist-package 'mime-view)
271 (ctree-find-calist condition entity-situation
274 (setq ret (mime-delq-null-situation ret required-name
276 (or (assq 'ignore-examples entity-situation)
284 (let ((situation (car rest))
285 (examples situation-examples))
288 (mime-compare-situation-with-example
289 situation (caar examples)))
290 (ret-score (car ret)))
291 (cond ((> ret-score max-score)
292 (setq max-score ret-score
293 max-escore (cdar examples)
294 max-examples (list (cdr ret))
295 max-situations (list situation)))
296 ((= ret-score max-score)
297 (cond ((> (cdar examples) max-escore)
298 (setq max-escore (cdar examples)
299 max-examples (list (cdr ret))
300 max-situations (list situation)))
301 ((= (cdar examples) max-escore)
303 (cons (cdr ret) max-examples))
304 (or (member situation max-situations)
306 (cons situation max-situations))))))))
307 (setq examples (cdr examples))))
308 (setq rest (cdr rest)))
310 (setq ret max-situations)
312 (let* ((example (car max-examples))
314 (assoc example situation-examples)))
316 (setcdr cell (1+ (cdr cell)))
317 (setq situation-examples
318 (cons (cons example 0)
319 situation-examples))))
320 (setq max-examples (cdr max-examples)))))))
321 (cons ret situation-examples)
322 ;; ret: list of situations
323 ;; situation-examples: new examples (notoce that contents of
324 ;; argument `situation-examples' has bees modified)
327 (defun mime-view-entity-title (entity)
328 (or (mime-entity-read-field entity 'Content-Description)
329 (mime-entity-read-field entity 'Subject)
330 (mime-entity-filename entity)
333 (defvar mime-preview-situation-example-list nil)
334 (defvar mime-preview-situation-example-list-max-size 16)
335 ;; (defvar mime-preview-situation-example-condition nil)
337 (defun mime-find-entity-preview-situation (entity
338 &optional default-situation)
340 (mime-unify-situations
341 (append (mime-entity-situation entity)
343 mime-preview-condition
344 mime-preview-situation-example-list)))
345 (setq mime-preview-situation-example-list
351 (defvar mime-acting-situation-example-list nil)
352 (defvar mime-acting-situation-example-list-max-size 16)
353 (defvar mime-situation-examples-file-coding-system nil)
355 (defun mime-view-read-situation-examples-file (&optional file)
357 (setq file mime-situation-examples-file))
359 (file-readable-p file))
361 (insert-file-contents file)
362 (setq mime-situation-examples-file-coding-system
364 ((boundp 'buffer-file-coding-system)
365 (symbol-value 'buffer-file-coding-system))
366 ((boundp 'file-coding-system)
367 (symbol-value 'file-coding-system))
369 ;; (and (boundp 'buffer-file-coding-system)
370 ;; buffer-file-coding-system)
372 (condition-case error
374 (error (message "%s is broken: %s" file (cdr error))))
378 (while (and (> (length mime-preview-situation-example-list)
379 mime-preview-situation-example-list-max-size)
381 (setq mime-preview-situation-example-list
382 (mime-reduce-situation-examples
383 mime-preview-situation-example-list))
385 (error (setq mime-preview-situation-example-list nil)))
386 ;; (let ((rest mime-preview-situation-example-list))
388 ;; (ctree-set-calist-strictly 'mime-preview-condition
390 ;; (setq rest (cdr rest))))
393 (while (and (> (length mime-acting-situation-example-list)
394 mime-acting-situation-example-list-max-size)
396 (setq mime-acting-situation-example-list
397 (mime-reduce-situation-examples
398 mime-acting-situation-example-list))
400 (error (setq mime-acting-situation-example-list nil))))))
402 (defun mime-save-situation-examples ()
403 (if (or mime-preview-situation-example-list
404 mime-acting-situation-example-list)
405 (let ((file mime-situation-examples-file)
406 print-length print-level)
408 (insert ";;; " (file-name-nondirectory file) "\n")
409 (insert "\n;; This file is generated automatically by "
410 mime-view-version "\n\n")
411 (insert ";;; Code:\n\n")
412 (if mime-preview-situation-example-list
413 (pp `(setq mime-preview-situation-example-list
414 ',mime-preview-situation-example-list)
416 (if mime-acting-situation-example-list
417 (pp `(setq mime-acting-situation-example-list
418 ',mime-acting-situation-example-list)
421 (file-name-nondirectory file)
424 ((boundp 'buffer-file-coding-system)
425 (setq buffer-file-coding-system
426 mime-situation-examples-file-coding-system))
427 ((boundp 'file-coding-system)
428 (setq file-coding-system
429 mime-situation-examples-file-coding-system)))
430 ;; (setq buffer-file-coding-system
431 ;; mime-situation-examples-file-coding-system)
432 (setq buffer-file-name file)
435 (add-hook 'kill-emacs-hook 'mime-save-situation-examples)
437 (defun mime-reduce-situation-examples (situation-examples)
438 (let ((len (length situation-examples))
446 ir situation-examples)
450 jr situation-examples)
454 (setq ret (mime-compare-situation-with-example (car ic)(car jc))
456 det-ret (+ (length (car ic))(length (car jc)))
457 det-org (length (cdr ret))
458 freq (+ (cdr ic)(cdr jc)))
459 (cond ((< max-sim sim)
466 dest (cons (cdr ret) freq)))
468 (cond ((> min-det-ret det-ret)
469 (setq min-det-ret det-ret
474 dest (cons (cdr ret) freq)))
475 ((= min-det-ret det-ret)
476 (cond ((> min-det-org det-org)
477 (setq min-det-org det-org
481 dest (cons (cdr ret) freq)))
482 ((= min-det-org det-org)
483 (cond ((> min-freq freq)
487 dest (cons (cdr ret) freq)))))))))))
496 (setq jr (nthcdr (1- d-j) situation-examples))
497 (setcdr jr (cddr jr))
499 (setq situation-examples
500 (cdr situation-examples))
501 (setq ir (nthcdr (1- d-i) situation-examples))
502 (setcdr ir (cddr ir)))
503 (if (setq ir (assoc (car dest) situation-examples))
505 (setcdr ir (+ (cdr ir)(cdr dest)))
507 (cons dest situation-examples)
508 ;; situation-examples may be modified.
512 ;;; @ presentation of preview
518 ;;; @@@ predicate function
521 ;; (defun mime-view-entity-button-visible-p (entity)
522 ;; "Return non-nil if header of ENTITY is visible.
523 ;; Please redefine this function if you want to change default setting."
524 ;; (let ((media-type (mime-entity-media-type entity))
525 ;; (media-subtype (mime-entity-media-subtype entity)))
526 ;; (or (not (eq media-type 'application))
527 ;; (and (not (eq media-subtype 'x-selection))
528 ;; (or (not (eq media-subtype 'octet-stream))
529 ;; (let ((mother-entity (mime-entity-parent entity)))
530 ;; (or (not (eq (mime-entity-media-type mother-entity)
532 ;; (not (eq (mime-entity-media-subtype mother-entity)
537 ;;; @@@ entity button generator
540 (defun mime-view-insert-entity-button (entity)
541 "Insert entity-button of ENTITY."
542 (let ((entity-node-id (mime-entity-node-id entity))
543 (params (mime-entity-parameters entity))
544 (subject (mime-view-entity-title entity)))
546 (let ((access-type (assoc "access-type" params))
547 (num (or (cdr (assoc "x-part-number" params))
548 (if (consp entity-node-id)
551 (format "%s" (1+ num))))
552 (reverse entity-node-id) ".")
555 (let ((server (assoc "server" params)))
556 (setq access-type (cdr access-type))
558 (format "%s %s ([%s] %s)"
559 num subject access-type (cdr server))
560 (let ((site (cdr (assoc "site" params)))
561 (dir (cdr (assoc "directory" params)))
562 (url (cdr (assoc "url" params))))
564 (format "%s %s ([%s] %s)"
565 num subject access-type url)
566 (format "%s %s ([%s] %s:%s)"
567 num subject access-type site dir))))))
569 (let ((media-type (mime-entity-media-type entity))
570 (media-subtype (mime-entity-media-subtype entity))
571 (charset (cdr (assoc "charset" params)))
572 (encoding (mime-entity-encoding entity)))
576 (format " <%s/%s%s%s>"
577 media-type media-subtype
579 (concat "; " charset)
582 (concat " (" encoding ")")
584 (if (>= (+ (current-column)(length rest))(window-width))
587 (function mime-preview-play-current-entity))))
593 (defvar mime-header-presentation-method-alist nil
594 "Alist of major mode vs. corresponding header-presentation-method functions.
595 Each element looks like (SYMBOL . FUNCTION).
596 SYMBOL must be major mode in raw-buffer or t. t means default.
597 Interface of FUNCTION must be (ENTITY SITUATION).")
599 (defvar mime-view-ignored-field-list
600 '(".*Received:" ".*Path:" ".*Id:" "^References:"
601 "^Replied:" "^Errors-To:"
602 "^Lines:" "^Sender:" ".*Host:" "^Xref:"
603 "^Content-Type:" "^Precedence:"
604 "^Status:" "^X-VM-.*:")
605 "All fields that match this list will be hidden in MIME preview buffer.
606 Each elements are regexp of field-name.")
608 (defvar mime-view-visible-field-list '("^Dnas.*:" "^Message-Id:")
609 "All fields that match this list will be displayed in MIME preview buffer.
610 Each elements are regexp of field-name.")
616 ;;; @@@ predicate function
619 (in-calist-package 'mime-view)
621 (defun mime-calist::field-match-method-as-default-rule (calist
622 field-type field-value)
623 (let ((s-field (assq field-type calist)))
624 (cond ((null s-field)
625 (cons (cons field-type field-value) calist))
628 (define-calist-field-match-method
629 'header #'mime-calist::field-match-method-as-default-rule)
631 (define-calist-field-match-method
632 'body #'mime-calist::field-match-method-as-default-rule)
634 (defun mime-calist::field-match-method-ignore-case (calist
635 field-type field-value)
636 (let ((s-field (assoc field-type calist)))
637 (cond ((null s-field)
638 (cons (cons field-type field-value) calist))
641 ((string= (downcase (cdr s-field)) (downcase field-value))
644 (define-calist-field-match-method
645 'access-type #'mime-calist::field-match-method-ignore-case)
648 (defvar mime-preview-condition nil
649 "Condition-tree about how to display entity.")
651 (ctree-set-calist-strictly
652 'mime-preview-condition '((type . application)(subtype . octet-stream)
655 (ctree-set-calist-strictly
656 'mime-preview-condition '((type . application)(subtype . octet-stream)
659 (ctree-set-calist-strictly
660 'mime-preview-condition '((type . application)(subtype . octet-stream)
664 (ctree-set-calist-strictly
665 'mime-preview-condition '((type . application)(subtype . pgp)
668 (ctree-set-calist-strictly
669 'mime-preview-condition '((type . application)(subtype . x-latex)
672 (ctree-set-calist-strictly
673 'mime-preview-condition '((type . application)(subtype . x-selection)
676 (ctree-set-calist-strictly
677 'mime-preview-condition '((type . application)(subtype . x-comment)
680 (ctree-set-calist-strictly
681 'mime-preview-condition '((type . message)(subtype . delivery-status)
684 (ctree-set-calist-strictly
685 'mime-preview-condition
687 (body-presentation-method . mime-display-text/plain)))
689 (defvar mime-preview-fill-flowed-text
690 (module-installed-p 'flow-fill)
691 "If non-nil, fill RFC2646 \"flowed\" text.")
693 (autoload 'fill-flowed "flow-fill")
695 (defvar mime-preview-inline-fontify t
696 "If non-nil, fontify the inline part.")
698 (ctree-set-calist-strictly
699 'mime-preview-condition
702 (body-presentation-method . mime-display-text/plain)))
704 (ctree-set-calist-strictly
705 'mime-preview-condition
706 '((type . text)(subtype . enriched)
708 (body-presentation-method . mime-display-text/enriched)))
710 (ctree-set-calist-strictly
711 'mime-preview-condition
712 '((type . text)(subtype . richtext)
714 (body-presentation-method . mime-display-text/richtext)))
716 (autoload 'mime-display-application/x-postpet "postpet")
718 (ctree-set-calist-strictly
719 'mime-preview-condition
720 '((type . application)(subtype . x-postpet)
722 (body-presentation-method . mime-display-application/x-postpet)))
724 (ctree-set-calist-strictly
725 'mime-preview-condition
726 '((type . application)(subtype . emacs-lisp)
728 (body-presentation-method . mime-display-application/emacs-lisp)))
730 (ctree-set-calist-strictly
731 'mime-preview-condition
732 '((type . text)(subtype . t)
734 (body-presentation-method . mime-display-text/plain)))
736 (ctree-set-calist-strictly
737 'mime-preview-condition
738 '((type . multipart)(subtype . alternative)
740 (body-presentation-method . mime-display-multipart/alternative)))
742 (ctree-set-calist-strictly
743 'mime-preview-condition
744 '((type . multipart)(subtype . related)
746 (body-presentation-method . mime-display-multipart/related)))
748 (ctree-set-calist-strictly
749 'mime-preview-condition
750 '((type . multipart)(subtype . t)
752 (body-presentation-method . mime-display-multipart/mixed)))
754 (ctree-set-calist-strictly
755 'mime-preview-condition
756 '((type . message)(subtype . partial)
758 (body-presentation-method . mime-display-message/partial-button)))
760 (ctree-set-calist-strictly
761 'mime-preview-condition
762 '((type . message)(subtype . rfc822)
764 (body-presentation-method . mime-display-multipart/mixed)
765 (childrens-situation (header . visible)
766 (entity-button . invisible))))
768 (ctree-set-calist-strictly
769 'mime-preview-condition
770 '((type . message)(subtype . news)
772 (body-presentation-method . mime-display-multipart/mixed)
773 (childrens-situation (header . visible)
774 (entity-button . invisible))))
777 ;;; @@@ entity presentation
780 (defun mime-display-text/plain (entity situation)
782 (narrow-to-region (point-max)(point-max))
784 (if (and mime-preview-inline-fontify
785 (mime-entity-filename entity)) ;should be an attachment.
786 (mime-view-insert-fontified-text-content entity situation)
787 (mime-view-insert-text-content entity situation))
789 (message "Can't decode current entity.")
791 (run-hooks 'mime-text-decode-hook)
792 (goto-char (point-max))
793 (if (not (eq (char-after (1- (point))) ?\n))
795 (if (and mime-preview-fill-flowed-text
796 (equal (cdr (assoc "format" situation)) "flowed"))
798 (mime-add-url-buttons)
799 (run-hooks 'mime-display-text/plain-hook)))
801 (defun mime-display-text/richtext (entity situation)
803 (narrow-to-region (point-max)(point-max))
804 (mime-view-insert-text-content entity situation)
805 (run-hooks 'mime-text-decode-hook)
806 (let ((beg (point-min)))
807 (remove-text-properties beg (point-max) '(face nil))
808 (richtext-decode beg (point-max)))))
810 (defun mime-display-text/enriched (entity situation)
812 (narrow-to-region (point-max)(point-max))
813 (mime-view-insert-text-content entity situation)
814 (run-hooks 'mime-text-decode-hook)
815 (let ((beg (point-min)))
816 (remove-text-properties beg (point-max) '(face nil))
817 (enriched-decode beg (point-max)))))
819 (defvar mime-view-announcement-for-message/partial
820 "This is message/partial style split message.")
822 (defun mime-display-message/partial-button (&optional entity situation)
824 (goto-char (point-max))
825 (if (not (search-backward "\n\n" nil t))
827 (goto-char (point-max))
828 (mime-insert-button mime-view-announcement-for-message/partial
829 #'mime-preview-play-current-entity)))
831 (defun mime-display-multipart/mixed (entity situation)
832 (let ((children (mime-entity-children entity))
833 (original-major-mode-cell (assq 'major-mode situation))
835 (cdr (assq 'childrens-situation situation))))
836 (if original-major-mode-cell
837 (setq default-situation
838 (cons original-major-mode-cell default-situation)))
840 (mime-display-entity (car children) nil default-situation)
841 (setq children (cdr children)))))
843 (defcustom mime-view-type-subtype-score-alist
844 '(((text . enriched) . 3)
845 ((text . richtext) . 2)
848 "Alist MEDIA-TYPE vs corresponding score.
849 MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t. t means default."
851 :type '(repeat (cons (choice :tag "Media-Type"
852 (cons :tag "Type/Subtype"
853 (symbol :tag "Primary-type")
854 (symbol :tag "Subtype"))
856 (const :tag "Default" t))
859 (defun mime-display-multipart/alternative (entity situation)
860 (let* ((children (mime-entity-children entity))
861 (original-major-mode-cell (assq 'major-mode situation))
863 (cdr (assq 'childrens-situation situation)))
868 (if original-major-mode-cell
869 (setq default-situation
870 (cons original-major-mode-cell default-situation)))
875 (mime-find-entity-preview-situation
876 child default-situation)))
877 (if (cdr (assq 'body-presentation-method situation))
882 (cdr (assq 'type situation))
883 (cdr (assq 'subtype situation)))
884 mime-view-type-subtype-score-alist)
886 (cdr (assq 'type situation))
887 mime-view-type-subtype-score-alist)
890 mime-view-type-subtype-score-alist)))))
891 (if (> score max-score)
899 (let ((child (car children))
900 (situation (car situations)))
901 (mime-display-entity child (if (= i p)
903 (put-alist 'body 'invisible
904 (copy-alist situation)))))
905 (setq children (cdr children)
906 situations (cdr situations)
909 (defun mime-display-multipart/related (entity situation)
910 (let* ((param-start (mime-parse-msg-id
911 (std11-lexical-analyze
913 (mime-content-type-parameters
914 (mime-entity-content-type entity)))))))
915 (start (or (and param-start (mime-find-entity-from-content-id
918 (car (mime-entity-children entity))))
919 (original-major-mode-cell (assq 'major-mode situation))
920 (default-situation (cdr (assq 'childrens-situation situation))))
922 (if original-major-mode-cell
923 (setq default-situation
924 (cons original-major-mode-cell default-situation)))
925 (mime-display-entity start nil default-situation))))
927 (defun mime-view-entity-content (entity situation)
929 (mime-entity-body entity)
930 (mime-view-guess-encoding entity situation)))
932 (defun mime-view-insert-text-content (entity situation)
933 (let (compression-info)
935 ((and (mime-entity-filename entity)
936 (featurep 'jka-compr)
937 (jka-compr-installed-p)
938 (setq compression-info (jka-compr-get-compression-info
939 (mime-entity-filename entity))))
941 (mime-view-filter-text-content
942 (mime-view-entity-content entity situation)
943 (jka-compr-info-uncompress-program compression-info)
944 (jka-compr-info-uncompress-args compression-info))))
945 ((or (assq '*encoding situation) ;should be specified by user
946 (assq '*charset situation)) ;should be specified by user
948 (decode-mime-charset-string
949 (mime-view-entity-content entity situation)
950 (mime-view-guess-charset entity situation)
953 (mime-insert-text-content entity)))))
955 ;;; stolen (and renamed) from `mime-display-gzipped' of EMY 1.13.
956 (defun mime-view-filter-text-content (content program args)
961 (apply #'binary-to-text-funcall
962 mime-view-automatic-conversion
963 #'call-process-region (point-min)(point-max)
966 (if (not (multibyte-string-p content))
967 (set-buffer-multibyte nil))
969 (apply #'binary-funcall
970 #'call-process-region (point-min)(point-max)
972 (set-buffer-multibyte t)
973 (decode-coding-region (point-min)(point-max)
974 mime-view-automatic-conversion)))
977 ;;; stolen (and renamed) from mm-view.el.
978 (defun mime-view-insert-fontified-text-content (entity situation
980 ;; XEmacs @#$@ version of font-lock refuses to fully turn itself
981 ;; on for buffers whose name begins with " ". That's why we use
982 ;; save-current-buffer/get-buffer-create rather than
984 (let ((buffer (generate-new-buffer "*fontification*"))
990 (buffer-disable-undo)
991 (kill-all-local-variables)
992 (mime-view-insert-text-content entity situation)
994 (let ((font-lock-maximum-size nil)
995 ;; Disable support modes, e.g., jit-lock, lazy-lock, etc.
996 (font-lock-mode-hook nil)
997 (font-lock-support-mode nil)
998 ;; I find font-lock a bit too verbose.
999 (font-lock-verbose nil))
1002 ((setq filename (mime-entity-filename entity))
1003 (let ((buffer-file-name
1004 (expand-file-name (file-name-nondirectory filename)
1005 temporary-file-directory)))
1007 ;; The mode function might have already turned on font-lock.
1008 (unless (symbol-value 'font-lock-mode)
1009 (font-lock-fontify-buffer)))
1010 ;; By default, XEmacs font-lock uses non-duplicable text
1011 ;; properties. This code forces all the text properties
1012 ;; to be copied along with the text.
1013 (static-when (fboundp 'extent-list)
1014 (map-extents (lambda (ext ignored)
1015 (set-extent-property ext 'duplicable t)
1017 nil nil nil nil nil 'text-prop)))
1018 (insert-buffer-substring buffer))
1019 (kill-buffer buffer))))
1021 (defun mime-display-application/emacs-lisp (entity situation)
1023 (narrow-to-region (point-max)(point-max))
1024 (mime-view-insert-fontified-text-content entity situation 'emacs-lisp-mode)
1025 (run-hooks 'mime-text-decode-hook 'mime-display-text/plain-hook)))
1028 ;;; @ acting-condition
1031 (defvar mime-acting-condition nil
1032 "Condition-tree about how to process entity.")
1034 (defun mime-view-read-mailcap-files (&optional files)
1036 (setq files mime-view-mailcap-files))
1039 (setq file (car files))
1040 (if (file-readable-p file)
1041 (setq entries (append entries (mime-parse-mailcap-file file))))
1042 (setq files (cdr files)))
1044 (let ((entry (car entries))
1047 (let* ((field (car entry))
1048 (field-type (car field)))
1049 (cond ((eq field-type 'view) (setq view field))
1050 ((eq field-type 'print) (setq print field))
1051 ((memq field-type '(compose composetyped edit)))
1052 (t (setq shared (cons field shared))))
1054 (setq entry (cdr entry)))
1055 (setq shared (nreverse shared))
1056 (ctree-set-calist-with-default
1057 'mime-acting-condition
1058 (append shared (list '(mode . "play")(cons 'method (cdr view)))))
1060 (ctree-set-calist-with-default
1061 'mime-acting-condition
1063 (list '(mode . "print")(cons 'method (cdr view)))))))
1064 (setq entries (cdr entries)))))
1066 (mime-view-read-mailcap-files)
1068 (ctree-set-calist-strictly
1069 'mime-acting-condition
1070 '((type . application)(subtype . octet-stream)
1072 (method . mime-detect-content)))
1074 (ctree-set-calist-with-default
1075 'mime-acting-condition
1076 '((mode . "extract")
1077 (method . mime-save-content)))
1079 (ctree-set-calist-strictly
1080 'mime-acting-condition
1081 '((type . text)(subtype . x-rot13-47)(mode . "play")
1082 (method . mime-view-caesar)))
1083 (ctree-set-calist-strictly
1084 'mime-acting-condition
1085 '((type . text)(subtype . x-rot13-47-48)(mode . "play")
1086 (method . mime-view-caesar)))
1088 (ctree-set-calist-strictly
1089 'mime-acting-condition
1090 '((type . message)(subtype . rfc822)(mode . "play")
1091 (method . mime-view-message/rfc822)))
1092 (ctree-set-calist-strictly
1093 'mime-acting-condition
1094 '((type . message)(subtype . partial)(mode . "play")
1095 (method . mime-store-message/partial-piece)))
1097 (ctree-set-calist-strictly
1098 'mime-acting-condition
1099 '((type . message)(subtype . external-body)
1100 ("access-type" . "anon-ftp")
1101 (method . mime-view-message/external-anon-ftp)))
1103 (ctree-set-calist-strictly
1104 'mime-acting-condition
1105 '((type . message)(subtype . external-body)
1106 ("access-type" . "url")
1107 (method . mime-view-message/external-url)))
1109 (ctree-set-calist-strictly
1110 'mime-acting-condition
1111 '((type . application)(subtype . octet-stream)
1112 (method . mime-save-content)))
1115 ;;; @ quitting method
1118 (defvar mime-preview-quitting-method-alist
1119 '((mime-show-message-mode
1120 . mime-preview-quitting-method-for-mime-show-message-mode))
1121 "Alist of major-mode vs. quitting-method of mime-view.")
1123 (defvar mime-preview-over-to-previous-method-alist nil
1124 "Alist of major-mode vs. over-to-previous-method of mime-view.")
1126 (defvar mime-preview-over-to-next-method-alist nil
1127 "Alist of major-mode vs. over-to-next-method of mime-view.")
1130 ;;; @ following method
1133 (defvar mime-preview-following-method-alist nil
1134 "Alist of major-mode vs. following-method of mime-view.")
1136 (defvar mime-view-following-required-fields-list
1143 (defun mime-display-entity (entity &optional situation
1144 default-situation preview-buffer)
1146 (setq preview-buffer (current-buffer)))
1147 (let* (e nb ne nhb nbb)
1148 (in-calist-package 'mime-view)
1151 (mime-find-entity-preview-situation entity default-situation)))
1152 (let ((button-is-invisible
1153 (eq (cdr (or (assq '*entity-button situation)
1154 (assq 'entity-button situation)))
1157 (eq (cdr (or (assq '*header situation)
1158 (assq 'header situation)))
1161 (eq (cdr (or (assq '*body situation)
1162 (assq 'body situation)))
1164 (children (mime-entity-children entity)))
1165 (set-buffer preview-buffer)
1167 (narrow-to-region nb nb)
1168 (or button-is-invisible
1169 ;; (if (mime-view-entity-button-visible-p entity)
1170 (mime-view-insert-entity-button entity)
1173 (if header-is-visible
1174 (let ((header-presentation-method
1175 (or (cdr (assq 'header-presentation-method situation))
1176 (cdr (assq (cdr (assq 'major-mode situation))
1177 mime-header-presentation-method-alist)))))
1179 (if header-presentation-method
1180 (funcall header-presentation-method entity situation)
1181 (mime-insert-header entity
1182 mime-view-ignored-field-list
1183 mime-view-visible-field-list))
1184 (mime-add-url-buttons)
1185 (run-hooks 'mime-display-header-hook)
1186 (put-text-property nhb (point-max) 'mime-view-entity-header entity)
1187 (goto-char (point-max))
1192 (let ((body-presentation-method
1193 (cdr (assq 'body-presentation-method situation))))
1194 (if (functionp body-presentation-method)
1195 (funcall body-presentation-method entity situation)
1196 (mime-display-text/plain entity situation)))
1197 (when button-is-invisible
1198 (goto-char (point-max))
1199 (mime-view-insert-entity-button entity))
1200 (unless header-is-visible
1201 (goto-char (point-max))
1203 (setq ne (point-max))
1205 (put-text-property nb ne 'mime-view-entity entity)
1206 (put-text-property nb ne 'mime-view-situation situation)
1207 (put-text-property nbb ne 'mime-view-entity-body entity)
1209 (if (and children body-is-visible)
1210 (let ((body-presentation-method
1211 (cdr (assq 'body-presentation-method situation))))
1212 (if (functionp body-presentation-method)
1213 (funcall body-presentation-method entity situation)
1214 (mime-display-multipart/mixed entity situation)))))))
1217 ;;; @ MIME viewer mode
1220 (defconst mime-view-popup-menu-list
1222 ["Move to upper entity" mime-preview-move-to-upper]
1223 ["Move to previous entity" mime-preview-move-to-previous]
1224 ["Move to next entity" mime-preview-move-to-next]
1225 ["Scroll-down" mime-preview-scroll-down-entity]
1226 ["Scroll-up" mime-preview-scroll-up-entity]
1227 ["Play current entity" mime-preview-play-current-entity]
1228 ["Extract current entity" mime-preview-extract-current-entity]
1229 ["Print current entity" mime-preview-print-current-entity])
1230 "Menu for MIME Viewer")
1232 (defun mime-view-popup-menu (event)
1233 "Popup the menu in the MIME Viewer buffer"
1235 (mime-popup-menu-popup mime-view-popup-menu-list event))
1237 ;;; The current local map is taken precendence over `widget-keymap',
1238 ;;; because GNU Emacs' widget implementation doesn't set `local-map' property.
1239 ;;; So we need to specify derivation.
1240 (defvar widget-keymap)
1241 (defun mime-view-maybe-inherit-widget-keymap ()
1242 (when (boundp 'widget-keymap)
1243 (set-keymap-parent (current-local-map) widget-keymap)))
1245 (add-hook 'mime-view-mode-hook 'mime-view-maybe-inherit-widget-keymap)
1247 (defun mime-view-define-keymap (&optional default)
1248 (let ((mime-view-mode-map (if (keymapp default)
1249 (copy-keymap default)
1250 (make-sparse-keymap))))
1251 (define-key mime-view-mode-map
1252 "u" (function mime-preview-move-to-upper))
1253 (define-key mime-view-mode-map
1254 "p" (function mime-preview-move-to-previous))
1255 (define-key mime-view-mode-map
1256 "n" (function mime-preview-move-to-next))
1257 (define-key mime-view-mode-map
1258 "\e\t" (function mime-preview-move-to-previous))
1259 (define-key mime-view-mode-map
1260 "\t" (function mime-preview-move-to-next))
1261 (define-key mime-view-mode-map
1262 " " (function mime-preview-scroll-up-entity))
1263 (define-key mime-view-mode-map
1264 "\M- " (function mime-preview-scroll-down-entity))
1265 (define-key mime-view-mode-map
1266 "\177" (function mime-preview-scroll-down-entity))
1267 (define-key mime-view-mode-map
1268 "\C-m" (function mime-preview-next-line-entity))
1269 (define-key mime-view-mode-map
1270 "\C-\M-m" (function mime-preview-previous-line-entity))
1271 (define-key mime-view-mode-map
1272 "v" (function mime-preview-play-current-entity))
1273 (define-key mime-view-mode-map
1274 "e" (function mime-preview-extract-current-entity))
1275 (define-key mime-view-mode-map
1276 "\C-c\C-p" (function mime-preview-print-current-entity))
1278 (define-key mime-view-mode-map
1279 "\C-c\C-t\C-f" (function mime-preview-toggle-header))
1280 (define-key mime-view-mode-map
1281 "\C-c\C-th" (function mime-preview-toggle-header))
1282 (define-key mime-view-mode-map
1283 "\C-c\C-t\C-c" (function mime-preview-toggle-content))
1285 (define-key mime-view-mode-map
1286 "\C-c\C-v\C-f" (function mime-preview-show-header))
1287 (define-key mime-view-mode-map
1288 "\C-c\C-vh" (function mime-preview-show-header))
1289 (define-key mime-view-mode-map
1290 "\C-c\C-v\C-c" (function mime-preview-show-content))
1292 (define-key mime-view-mode-map
1293 "\C-c\C-d\C-f" (function mime-preview-hide-header))
1294 (define-key mime-view-mode-map
1295 "\C-c\C-dh" (function mime-preview-hide-header))
1296 (define-key mime-view-mode-map
1297 "\C-c\C-d\C-c" (function mime-preview-hide-content))
1299 (define-key mime-view-mode-map
1300 "a" (function mime-preview-follow-current-entity))
1301 (define-key mime-view-mode-map
1302 "q" (function mime-preview-quit))
1303 (define-key mime-view-mode-map
1304 "\C-c\C-x" (function mime-preview-kill-buffer))
1305 ;; (define-key mime-view-mode-map
1306 ;; "<" (function beginning-of-buffer))
1307 ;; (define-key mime-view-mode-map
1308 ;; ">" (function end-of-buffer))
1309 (define-key mime-view-mode-map
1310 "?" (function describe-mode))
1311 (define-key mime-view-mode-map
1312 [tab] (function mime-preview-move-to-next))
1313 (define-key mime-view-mode-map
1314 [delete] (function mime-preview-scroll-down-entity))
1315 (define-key mime-view-mode-map
1316 [backspace] (function mime-preview-scroll-down-entity))
1317 (if (functionp default)
1318 (if (featurep 'xemacs)
1319 (set-keymap-default-binding mime-view-mode-map default)
1320 (setq mime-view-mode-map
1321 (append mime-view-mode-map (list (cons t default))))))
1322 (define-key mime-view-mode-map
1323 [down-mouse-3] (function mime-view-popup-menu))
1324 ;; (run-hooks 'mime-view-define-keymap-hook)
1325 mime-view-mode-map))
1327 (defvar mime-view-mode-default-map (mime-view-define-keymap))
1330 (defsubst mime-maybe-hide-echo-buffer ()
1331 "Clear mime-echo buffer and delete window for it."
1332 (let ((buf (get-buffer mime-echo-buffer-name)))
1337 (let ((win (get-buffer-window buf)))
1339 (delete-window win)))
1340 (bury-buffer buf)))))
1342 (defvar mime-view-redisplay nil)
1345 (defun mime-display-message (message &optional preview-buffer
1346 mother default-keymap-or-function
1347 original-major-mode keymap)
1348 "View MESSAGE in MIME-View mode.
1350 Optional argument PREVIEW-BUFFER specifies the buffer of the
1351 presentation. It must be either nil or a name of preview buffer.
1353 Optional argument MOTHER specifies mother-buffer of the preview-buffer.
1355 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
1356 function. If it is a keymap, keymap of MIME-View mode will be added
1357 to it. If it is a function, it will be bound as default binding of
1358 keymap of MIME-View mode.
1360 Optional argument ORIGINAL-MAJOR-MODE is major-mode of representation
1361 buffer of MESSAGE. If it is nil, current `major-mode' is used.
1363 Optional argument KEYMAP is keymap of MIME-View mode. If it is
1364 non-nil, DEFAULT-KEYMAP-OR-FUNCTION is ignored. If it is nil,
1365 `mime-view-mode-default-map' is used."
1366 (mime-maybe-hide-echo-buffer)
1367 (let ((win-conf (current-window-configuration)))
1369 (setq preview-buffer
1370 (concat "*Preview-" (mime-entity-name message) "*")))
1371 (or original-major-mode
1372 (setq original-major-mode major-mode))
1373 (let ((inhibit-read-only t))
1374 (set-buffer (get-buffer-create preview-buffer))
1378 (setq mime-mother-buffer mother))
1379 (setq mime-preview-original-window-configuration win-conf)
1380 (setq major-mode 'mime-view-mode)
1381 (setq mode-name "MIME-View")
1382 (mime-display-entity message nil
1383 `((entity-button . invisible)
1385 (major-mode . ,original-major-mode))
1389 (if default-keymap-or-function
1390 (mime-view-define-keymap default-keymap-or-function)
1391 mime-view-mode-default-map)))
1393 (next-single-property-change (point-min) 'mime-view-entity)))
1396 (goto-char (point-min))
1397 (search-forward "\n\n" nil t)))
1398 (run-hooks 'mime-view-mode-hook)
1399 (set-buffer-modified-p nil)
1400 (setq buffer-read-only t)
1404 (defun mime-view-buffer (&optional raw-buffer preview-buffer mother
1405 default-keymap-or-function
1406 representation-type)
1407 "View RAW-BUFFER in MIME-View mode.
1408 Optional argument PREVIEW-BUFFER is either nil or a name of preview
1410 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
1411 function. If it is a keymap, keymap of MIME-View mode will be added
1412 to it. If it is a function, it will be bound as default binding of
1413 keymap of MIME-View mode.
1414 Optional argument REPRESENTATION-TYPE is representation-type of
1415 message. It must be nil, `binary' or `cooked'. If it is nil,
1416 `cooked' is used as default."
1419 (setq raw-buffer (current-buffer)))
1420 (or representation-type
1421 (setq representation-type
1423 (set-buffer raw-buffer)
1424 (cdr (or (assq major-mode mime-raw-representation-type-alist)
1425 (assq t mime-raw-representation-type-alist))))))
1426 (if (eq representation-type 'binary)
1427 (setq representation-type 'buffer))
1428 (setq preview-buffer (mime-display-message
1429 (mime-open-entity representation-type raw-buffer)
1430 preview-buffer mother default-keymap-or-function))
1431 (or (get-buffer-window preview-buffer)
1432 (let ((r-win (get-buffer-window raw-buffer)))
1434 (set-window-buffer r-win preview-buffer)
1435 (let ((m-win (and mother (get-buffer-window mother))))
1437 (set-window-buffer m-win preview-buffer)
1438 (switch-to-buffer preview-buffer)))))))
1440 (defun mime-view-mode (&optional mother ctl encoding
1441 raw-buffer preview-buffer
1442 default-keymap-or-function)
1443 "Major mode for viewing MIME message.
1445 Here is a list of the standard keys for mime-view-mode.
1450 u Move to upper content
1451 p or M-TAB Move to previous content
1452 n or TAB Move to next content
1453 SPC Scroll up or move to next content
1454 M-SPC or DEL Scroll down or move to previous content
1455 RET Move to next line
1456 M-RET Move to previous line
1457 v Decode current content as `play mode'
1458 e Decode current content as `extract mode'
1459 C-c C-p Decode current content as `print mode'
1460 a Followup to current content.
1462 button-2 Move to point under the mouse cursor
1463 and decode current content as `play mode'
1466 (unless mime-view-redisplay
1468 (if raw-buffer (set-buffer raw-buffer))
1471 (or (assq major-mode mime-raw-representation-type-alist)
1472 (assq t mime-raw-representation-type-alist)))))
1473 (if (eq type 'binary)
1474 (setq type 'buffer))
1475 (setq mime-message-structure (mime-open-entity type raw-buffer))
1476 (or (mime-entity-content-type mime-message-structure)
1477 (mime-entity-set-content-type mime-message-structure ctl)))
1478 (or (mime-entity-encoding mime-message-structure)
1479 (mime-entity-set-encoding mime-message-structure encoding))))
1480 (mime-display-message mime-message-structure preview-buffer
1481 mother default-keymap-or-function))
1487 (defun mime-preview-find-boundary-info (&optional with-children)
1488 "Return boundary information of current part.
1489 If WITH-CHILDREN, refer boundary surrounding current part and its branches."
1495 (get-text-property (point) 'mime-view-entity)))
1496 (> (point) (point-min)))
1498 (setq p-beg (previous-single-property-change (point) 'mime-view-entity))
1499 (setq entity-node-id (and entity (mime-entity-node-id entity)))
1500 (setq len (length entity-node-id))
1503 (if (eq (next-single-property-change (point-min)
1508 ((eq (next-single-property-change p-beg 'mime-view-entity)
1510 (setq p-beg (point))))
1511 (setq p-end (next-single-property-change p-beg 'mime-view-entity))
1513 (setq p-end (point-max)))
1514 ((null entity-node-id)
1515 (setq p-end (point-max)))
1521 (next-single-property-change
1522 (point) 'mime-view-entity))
1524 (let ((rc (mime-entity-node-id
1525 (get-text-property (point)
1526 'mime-view-entity))))
1527 (or (and (>= (setq i (- (length rc) len)) 0)
1528 (equal entity-node-id (nthcdr i rc)))
1530 (setq p-end (or (next-single-property-change
1531 (point) 'mime-view-entity)
1533 (setq p-end (point-max))))))
1534 (vector p-beg p-end entity)))
1540 (autoload 'mime-preview-play-current-entity "mime-play"
1541 "Play current entity." t)
1543 (defun mime-preview-extract-current-entity (&optional ignore-examples)
1544 "Extract current entity into file (maybe).
1545 It decodes current entity to call internal or external method as
1546 \"extract\" mode. The method is selected from variable
1547 `mime-acting-condition'."
1549 (mime-preview-play-current-entity ignore-examples "extract"))
1551 (defun mime-preview-print-current-entity (&optional ignore-examples)
1552 "Print current entity (maybe).
1553 It decodes current entity to call internal or external method as
1554 \"print\" mode. The method is selected from variable
1555 `mime-acting-condition'."
1557 (mime-preview-play-current-entity ignore-examples "print"))
1563 (defun mime-preview-follow-current-entity ()
1564 "Write follow message to current entity.
1565 It calls following-method selected from variable
1566 `mime-preview-following-method-alist'."
1568 (let* ((boundary-info (mime-preview-find-boundary-info t))
1569 (p-beg (aref boundary-info 0))
1570 (p-end (aref boundary-info 1))
1571 (entity (aref boundary-info 2))
1573 (if (or (get-text-property p-beg 'mime-view-entity-body)
1577 (next-single-property-change
1578 p-beg 'mime-view-entity-body nil
1579 (or (next-single-property-change p-beg 'mime-view-entity)
1581 (let* ((mode (mime-preview-original-major-mode 'recursive))
1582 (entity-node-id (and entity (mime-entity-node-id entity)))
1584 (format "%s-%s" (buffer-name) (reverse entity-node-id)))
1586 (the-buf (current-buffer))
1589 (set-buffer (setq new-buf (get-buffer-create new-name)))
1592 (insert-buffer-substring the-buf pb-beg p-end)
1593 (goto-char (point-min))
1594 (let ((current-entity
1596 (eq (mime-entity-media-type entity) 'message)
1597 (eq (mime-entity-media-subtype entity) 'rfc822))
1598 (car (mime-entity-children entity))
1600 (while (and current-entity
1601 (if (and (eq (mime-entity-media-type
1602 current-entity) 'message)
1603 (eq (mime-entity-media-subtype
1604 current-entity) 'rfc822))
1606 (mime-insert-header current-entity fields)
1608 (setq fields (std11-collect-field-names)
1609 current-entity (mime-entity-parent current-entity))))
1610 (let ((rest mime-view-following-required-fields-list)
1613 (setq field-name (car rest))
1614 (or (std11-field-body field-name)
1617 (set-buffer the-buf)
1618 (let ((entity (when mime-mother-buffer
1619 (set-buffer mime-mother-buffer)
1620 (get-text-property (point)
1621 'mime-view-entity))))
1623 (null (setq ret (mime-entity-fetch-field
1624 entity field-name))))
1625 (setq entity (mime-entity-parent entity)))))
1627 (insert (concat field-name ": " ret "\n")))))
1628 (setq rest (cdr rest)))))
1629 (let ((f (cdr (assq mode mime-preview-following-method-alist))))
1633 "Sorry, following method for %s is not implemented yet."
1640 (defun mime-preview-move-to-upper ()
1641 "Move to upper entity.
1642 If there is no upper entity, call function `mime-preview-quit'."
1645 (while (null (setq cinfo
1646 (get-text-property (point) 'mime-view-entity)))
1648 (let ((r (mime-entity-parent cinfo))
1651 (while (setq point (previous-single-property-change
1652 (point) 'mime-view-entity))
1654 (when (eq r (get-text-property (point) 'mime-view-entity))
1655 (if (or (eq mime-preview-move-scroll t)
1656 (and mime-preview-move-scroll
1659 (move-to-window-line -1)
1660 (forward-line (* -1 next-screen-context-lines))
1663 (recenter next-screen-context-lines))
1665 (mime-preview-quit)))))
1667 (defun mime-preview-move-to-previous ()
1668 "Move to previous entity.
1669 If there is no previous entity, it calls function registered in
1670 variable `mime-preview-over-to-previous-method-alist'."
1672 (while (and (not (bobp))
1673 (null (get-text-property (point) 'mime-view-entity)))
1675 (let ((point (previous-single-property-change (point) 'mime-view-entity)))
1677 (>= point (point-min)))
1678 (if (get-text-property (1- point) 'mime-view-entity)
1679 (progn (goto-char point)
1681 (or (eq mime-preview-move-scroll t)
1682 (and mime-preview-move-scroll
1685 (move-to-window-line 0)
1686 (forward-line next-screen-context-lines)
1689 (recenter (* -1 next-screen-context-lines))))
1690 (goto-char (1- point))
1691 (mime-preview-move-to-previous))
1692 (let ((f (assq (mime-preview-original-major-mode)
1693 mime-preview-over-to-previous-method-alist)))
1695 (funcall (cdr f)))))))
1697 (defun mime-preview-move-to-next ()
1698 "Move to next entity.
1699 If there is no previous entity, it calls function registered in
1700 variable `mime-preview-over-to-next-method-alist'."
1702 (while (and (not (eobp))
1703 (null (get-text-property (point) 'mime-view-entity)))
1705 (let ((point (next-single-property-change (point) 'mime-view-entity)))
1707 (<= point (point-max)))
1710 (if (null (get-text-property point 'mime-view-entity))
1711 (mime-preview-move-to-next)
1713 (or (eq mime-preview-move-scroll t)
1714 (and mime-preview-move-scroll
1717 (move-to-window-line -1)
1719 (* -1 next-screen-context-lines))
1722 (recenter next-screen-context-lines))))
1723 (let ((f (assq (mime-preview-original-major-mode)
1724 mime-preview-over-to-next-method-alist)))
1726 (funcall (cdr f)))))))
1728 (defun mime-preview-scroll-up-entity (&optional h)
1729 "Scroll up current entity.
1730 If reached to (point-max), it calls function registered in variable
1731 `mime-preview-over-to-next-method-alist'."
1734 (let ((f (assq (mime-preview-original-major-mode)
1735 mime-preview-over-to-next-method-alist)))
1739 (or (next-single-property-change (point) 'mime-view-entity)
1741 (bottom (window-end (selected-window))))
1744 (progn (goto-char point)
1745 (recenter next-screen-context-lines))
1749 (goto-char (point-max))))))))
1751 (defun mime-preview-scroll-down-entity (&optional h)
1752 "Scroll down current entity.
1753 If reached to (point-min), it calls function registered in variable
1754 `mime-preview-over-to-previous-method-alist'."
1757 (let ((f (assq (mime-preview-original-major-mode)
1758 mime-preview-over-to-previous-method-alist)))
1762 (or (previous-single-property-change (point) 'mime-view-entity)
1764 (top (window-start (selected-window))))
1767 (progn (goto-char point)
1768 (recenter (* -1 next-screen-context-lines)))
1771 (beginning-of-buffer
1772 (goto-char (point-min))))))))
1774 (defun mime-preview-next-line-entity (&optional lines)
1775 "Scroll up one line (or prefix LINES lines).
1776 If LINES is negative, scroll down LINES lines."
1778 (mime-preview-scroll-up-entity (or lines 1)))
1780 (defun mime-preview-previous-line-entity (&optional lines)
1781 "Scrroll down one line (or prefix LINES lines).
1782 If LINES is negative, scroll up LINES lines."
1784 (mime-preview-scroll-down-entity (or lines 1)))
1790 (defun mime-view-guess-encoding (entity situation)
1791 (or (cdr (assq '*encoding situation))
1792 (cdr (assq 'encoding situation))
1793 (mime-entity-encoding entity)
1796 (defun mime-view-read-encoding (entity situation)
1797 (let* ((default-encoding
1798 (mime-view-guess-encoding entity situation))
1801 "Content Transfer Encoding: "
1802 (mime-encoding-alist) nil t default-encoding)))
1803 (unless (or (string= encoding "")
1804 (string= encoding default-encoding))
1807 (defun mime-view-guess-charset (entity situation)
1808 (or (static-if (fboundp 'coding-system-to-mime-charset)
1809 ;; might be overridden by `universal-coding-system-argument'.
1810 (and coding-system-for-read
1811 (coding-system-to-mime-charset coding-system-for-read)))
1812 (cdr (assq '*charset situation))
1813 (cdr (assq 'charset situation))
1814 (let ((charset (cdr (assoc "charset" (mime-entity-parameters entity)))))
1816 (intern (downcase charset))))
1817 default-mime-charset))
1819 (defun mime-view-read-charset (entity situation)
1820 (static-if (featurep 'mule)
1821 (let* ((default-charset
1822 (mime-view-guess-charset entity situation))
1824 (intern (completing-read "MIME-charset: "
1827 (list (symbol-name sym)))
1828 (mime-charset-list))
1830 (symbol-name default-charset)))))
1831 (unless (eq charset default-charset)
1835 (defun mime-preview-toggle-display (type &optional display)
1836 (let ((situation (mime-preview-find-boundary-info t))
1837 (sym (intern (concat "*" (symbol-name type))))
1838 entity p-beg p-end encoding charset)
1839 (setq p-beg (aref situation 0)
1840 p-end (aref situation 1)
1841 entity (aref situation 2)
1842 situation (get-text-property p-beg 'mime-view-situation))
1843 (cond ((eq display 'invisible)
1848 (memq (cdr (or (assq sym situation)
1849 (assq type situation)))
1850 '(nil invisible)))))
1851 (setq situation (put-alist sym (if display
1855 (when (and current-prefix-arg
1856 (eq (cdr (assq sym situation)) 'visible))
1857 (if (setq encoding (mime-view-read-encoding entity situation))
1858 (setq situation (put-alist '*encoding encoding situation)))
1859 (if (setq charset (mime-view-read-charset entity situation))
1860 (setq situation (put-alist '*charset charset situation))))
1862 (let ((inhibit-read-only t))
1863 (delete-region p-beg p-end)
1864 (mime-display-entity entity situation)))
1865 (let ((ret (assoc situation mime-preview-situation-example-list)))
1867 (setcdr ret (1+ (cdr ret)))
1868 (add-to-list 'mime-preview-situation-example-list
1869 (cons situation 0))))))
1871 (defun mime-preview-toggle-header (&optional force-visible)
1873 (mime-preview-toggle-display 'header force-visible))
1875 (defun mime-preview-toggle-content (&optional force-visible)
1877 (mime-preview-toggle-display 'body force-visible))
1879 (defun mime-preview-show-header ()
1881 (mime-preview-toggle-display 'header 'visible))
1883 (defun mime-preview-show-content ()
1885 (mime-preview-toggle-display 'body 'visible))
1887 (defun mime-preview-hide-header ()
1889 (mime-preview-toggle-display 'header 'invisible))
1891 (defun mime-preview-hide-content ()
1893 (mime-preview-toggle-display 'body 'invisible))
1899 (defun mime-preview-quit ()
1900 "Quit from MIME-preview buffer.
1901 It calls function registered in variable
1902 `mime-preview-quitting-method-alist'."
1904 (let ((r (assq (mime-preview-original-major-mode)
1905 mime-preview-quitting-method-alist)))
1907 (funcall (cdr r)))))
1909 (defun mime-preview-kill-buffer ()
1911 (kill-buffer (current-buffer)))
1917 (provide 'mime-view)
1920 (setq mime-situation-examples-file nil)
1921 ;; to avoid to read situation-examples-file at compile time.
1924 (mime-view-read-situation-examples-file)
1926 ;;; mime-view.el ends here