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)
635 (defvar mime-preview-condition nil
636 "Condition-tree about how to display entity.")
638 (ctree-set-calist-strictly
639 'mime-preview-condition '((type . application)(subtype . octet-stream)
642 (ctree-set-calist-strictly
643 'mime-preview-condition '((type . application)(subtype . octet-stream)
646 (ctree-set-calist-strictly
647 'mime-preview-condition '((type . application)(subtype . octet-stream)
651 (ctree-set-calist-strictly
652 'mime-preview-condition '((type . application)(subtype . pgp)
655 (ctree-set-calist-strictly
656 'mime-preview-condition '((type . application)(subtype . x-latex)
659 (ctree-set-calist-strictly
660 'mime-preview-condition '((type . application)(subtype . x-selection)
663 (ctree-set-calist-strictly
664 'mime-preview-condition '((type . application)(subtype . x-comment)
667 (ctree-set-calist-strictly
668 'mime-preview-condition '((type . message)(subtype . delivery-status)
671 (ctree-set-calist-strictly
672 'mime-preview-condition
674 (body-presentation-method . mime-display-text/plain)))
676 (defvar mime-preview-fill-flowed-text
677 (module-installed-p 'flow-fill)
678 "If non-nil, fill RFC2646 \"flowed\" text.")
680 (autoload 'fill-flowed "flow-fill")
682 (defvar mime-preview-inline-fontify t
683 "If non-nil, fontify the inline part.")
685 (ctree-set-calist-strictly
686 'mime-preview-condition
689 (body-presentation-method . mime-display-text/plain)))
691 (ctree-set-calist-strictly
692 'mime-preview-condition
693 '((type . text)(subtype . enriched)
695 (body-presentation-method . mime-display-text/enriched)))
697 (ctree-set-calist-strictly
698 'mime-preview-condition
699 '((type . text)(subtype . richtext)
701 (body-presentation-method . mime-display-text/richtext)))
703 (autoload 'mime-display-application/x-postpet "postpet")
705 (ctree-set-calist-strictly
706 'mime-preview-condition
707 '((type . application)(subtype . x-postpet)
709 (body-presentation-method . mime-display-application/x-postpet)))
711 (ctree-set-calist-strictly
712 'mime-preview-condition
713 '((type . application)(subtype . emacs-lisp)
715 (body-presentation-method . mime-display-application/emacs-lisp)))
717 (ctree-set-calist-strictly
718 'mime-preview-condition
719 '((type . text)(subtype . t)
721 (body-presentation-method . mime-display-text/plain)))
723 (ctree-set-calist-strictly
724 'mime-preview-condition
725 '((type . multipart)(subtype . alternative)
727 (body-presentation-method . mime-display-multipart/alternative)))
729 (ctree-set-calist-strictly
730 'mime-preview-condition
731 '((type . multipart)(subtype . related)
733 (body-presentation-method . mime-display-multipart/related)))
735 (ctree-set-calist-strictly
736 'mime-preview-condition
737 '((type . multipart)(subtype . t)
739 (body-presentation-method . mime-display-multipart/mixed)))
741 (ctree-set-calist-strictly
742 'mime-preview-condition
743 '((type . message)(subtype . partial)
745 (body-presentation-method . mime-display-message/partial-button)))
747 (ctree-set-calist-strictly
748 'mime-preview-condition
749 '((type . message)(subtype . rfc822)
751 (body-presentation-method . mime-display-multipart/mixed)
752 (childrens-situation (header . visible)
753 (entity-button . invisible))))
755 (ctree-set-calist-strictly
756 'mime-preview-condition
757 '((type . message)(subtype . news)
759 (body-presentation-method . mime-display-multipart/mixed)
760 (childrens-situation (header . visible)
761 (entity-button . invisible))))
764 ;;; @@@ entity presentation
767 (defun mime-display-text/plain (entity situation)
769 (narrow-to-region (point-max)(point-max))
771 (if (and mime-preview-inline-fontify
772 (mime-entity-filename entity)) ;should be an attachment.
773 (mime-view-insert-fontified-text-content entity situation)
774 (mime-view-insert-text-content entity situation))
776 (message "Can't decode current entity.")
778 (run-hooks 'mime-text-decode-hook)
779 (goto-char (point-max))
780 (if (not (eq (char-after (1- (point))) ?\n))
782 (if (and mime-preview-fill-flowed-text
783 (equal (cdr (assoc "format" situation)) "flowed"))
785 (mime-add-url-buttons)
786 (run-hooks 'mime-display-text/plain-hook)))
788 (defun mime-display-text/richtext (entity situation)
790 (narrow-to-region (point-max)(point-max))
791 (mime-view-insert-text-content entity situation)
792 (run-hooks 'mime-text-decode-hook)
793 (let ((beg (point-min)))
794 (remove-text-properties beg (point-max) '(face nil))
795 (richtext-decode beg (point-max)))))
797 (defun mime-display-text/enriched (entity situation)
799 (narrow-to-region (point-max)(point-max))
800 (mime-view-insert-text-content entity situation)
801 (run-hooks 'mime-text-decode-hook)
802 (let ((beg (point-min)))
803 (remove-text-properties beg (point-max) '(face nil))
804 (enriched-decode beg (point-max)))))
806 (defvar mime-view-announcement-for-message/partial
807 "This is message/partial style split message.")
809 (defun mime-display-message/partial-button (&optional entity situation)
811 (goto-char (point-max))
812 (if (not (search-backward "\n\n" nil t))
814 (goto-char (point-max))
815 (mime-insert-button mime-view-announcement-for-message/partial
816 #'mime-preview-play-current-entity)))
818 (defun mime-display-multipart/mixed (entity situation)
819 (let ((children (mime-entity-children entity))
820 (original-major-mode-cell (assq 'major-mode situation))
822 (cdr (assq 'childrens-situation situation))))
823 (if original-major-mode-cell
824 (setq default-situation
825 (cons original-major-mode-cell default-situation)))
827 (mime-display-entity (car children) nil default-situation)
828 (setq children (cdr children)))))
830 (defcustom mime-view-type-subtype-score-alist
831 '(((text . enriched) . 3)
832 ((text . richtext) . 2)
835 "Alist MEDIA-TYPE vs corresponding score.
836 MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t. t means default."
838 :type '(repeat (cons (choice :tag "Media-Type"
839 (cons :tag "Type/Subtype"
840 (symbol :tag "Primary-type")
841 (symbol :tag "Subtype"))
843 (const :tag "Default" t))
846 (defun mime-display-multipart/alternative (entity situation)
847 (let* ((children (mime-entity-children entity))
848 (original-major-mode-cell (assq 'major-mode situation))
850 (cdr (assq 'childrens-situation situation)))
855 (if original-major-mode-cell
856 (setq default-situation
857 (cons original-major-mode-cell default-situation)))
862 (mime-find-entity-preview-situation
863 child default-situation)))
864 (if (cdr (assq 'body-presentation-method situation))
869 (cdr (assq 'type situation))
870 (cdr (assq 'subtype situation)))
871 mime-view-type-subtype-score-alist)
873 (cdr (assq 'type situation))
874 mime-view-type-subtype-score-alist)
877 mime-view-type-subtype-score-alist)))))
878 (if (> score max-score)
886 (let ((child (car children))
887 (situation (car situations)))
888 (mime-display-entity child (if (= i p)
890 (put-alist 'body 'invisible
891 (copy-alist situation)))))
892 (setq children (cdr children)
893 situations (cdr situations)
896 (defun mime-display-multipart/related (entity situation)
897 (let* ((param-start (mime-parse-msg-id
898 (std11-lexical-analyze
900 (mime-content-type-parameters
901 (mime-entity-content-type entity)))))))
902 (start (or (and param-start (mime-find-entity-from-content-id
905 (car (mime-entity-children entity))))
906 (original-major-mode-cell (assq 'major-mode situation))
907 (default-situation (cdr (assq 'childrens-situation situation))))
909 (if original-major-mode-cell
910 (setq default-situation
911 (cons original-major-mode-cell default-situation)))
912 (mime-display-entity start nil default-situation))))
914 (defun mime-view-entity-content (entity situation)
916 (mime-entity-body entity)
917 (mime-view-guess-encoding entity situation)))
919 (defun mime-view-insert-text-content (entity situation)
920 (let (compression-info)
922 ((and (mime-entity-filename entity)
923 (featurep 'jka-compr)
924 (jka-compr-installed-p)
925 (setq compression-info (jka-compr-get-compression-info
926 (mime-entity-filename entity))))
928 (mime-view-filter-text-content
929 (mime-view-entity-content entity situation)
930 (jka-compr-info-uncompress-program compression-info)
931 (jka-compr-info-uncompress-args compression-info))))
932 ((or (assq '*encoding situation) ;should be specified by user
933 (assq '*charset situation)) ;should be specified by user
935 (decode-mime-charset-string
936 (mime-view-entity-content entity situation)
937 (mime-view-guess-charset entity situation)
940 (mime-insert-text-content entity)))))
942 ;;; stolen (and renamed) from `mime-display-gzipped' of EMY 1.13.
943 (defun mime-view-filter-text-content (content program args)
948 (apply #'binary-to-text-funcall
949 mime-view-automatic-conversion
950 #'call-process-region (point-min)(point-max)
953 (if (not (multibyte-string-p content))
954 (set-buffer-multibyte nil))
956 (apply #'binary-funcall
957 #'call-process-region (point-min)(point-max)
959 (set-buffer-multibyte t)
960 (decode-coding-region (point-min)(point-max)
961 mime-view-automatic-conversion)))
964 ;;; stolen (and renamed) from mm-view.el.
965 (defun mime-view-insert-fontified-text-content (entity situation
967 ;; XEmacs @#$@ version of font-lock refuses to fully turn itself
968 ;; on for buffers whose name begins with " ". That's why we use
969 ;; save-current-buffer/get-buffer-create rather than
971 (let ((buffer (generate-new-buffer "*fontification*"))
977 (buffer-disable-undo)
978 (kill-all-local-variables)
979 (mime-view-insert-text-content entity situation)
981 (let ((font-lock-maximum-size nil)
982 ;; Disable support modes, e.g., jit-lock, lazy-lock, etc.
983 (font-lock-mode-hook nil)
984 (font-lock-support-mode nil)
985 ;; I find font-lock a bit too verbose.
986 (font-lock-verbose nil))
989 ((setq filename (mime-entity-filename entity))
990 (let ((buffer-file-name
991 (expand-file-name (file-name-nondirectory filename)
992 temporary-file-directory)))
994 ;; The mode function might have already turned on font-lock.
995 (unless (symbol-value 'font-lock-mode)
996 (font-lock-fontify-buffer)))
997 ;; By default, XEmacs font-lock uses non-duplicable text
998 ;; properties. This code forces all the text properties
999 ;; to be copied along with the text.
1000 (static-when (fboundp 'extent-list)
1001 (map-extents (lambda (ext ignored)
1002 (set-extent-property ext 'duplicable t)
1004 nil nil nil nil nil 'text-prop)))
1005 (insert-buffer-substring buffer))
1006 (kill-buffer buffer))))
1008 (defun mime-display-application/emacs-lisp (entity situation)
1010 (narrow-to-region (point-max)(point-max))
1011 (mime-view-insert-fontified-text-content entity situation 'emacs-lisp-mode)
1012 (run-hooks 'mime-text-decode-hook 'mime-display-text/plain-hook)))
1015 ;;; @ acting-condition
1018 (defvar mime-acting-condition nil
1019 "Condition-tree about how to process entity.")
1021 (defun mime-view-read-mailcap-files (&optional files)
1023 (setq files mime-view-mailcap-files))
1026 (setq file (car files))
1027 (if (file-readable-p file)
1028 (setq entries (append entries (mime-parse-mailcap-file file))))
1029 (setq files (cdr files)))
1031 (let ((entry (car entries))
1034 (let* ((field (car entry))
1035 (field-type (car field)))
1036 (cond ((eq field-type 'view) (setq view field))
1037 ((eq field-type 'print) (setq print field))
1038 ((memq field-type '(compose composetyped edit)))
1039 (t (setq shared (cons field shared))))
1041 (setq entry (cdr entry)))
1042 (setq shared (nreverse shared))
1043 (ctree-set-calist-with-default
1044 'mime-acting-condition
1045 (append shared (list '(mode . "play")(cons 'method (cdr view)))))
1047 (ctree-set-calist-with-default
1048 'mime-acting-condition
1050 (list '(mode . "print")(cons 'method (cdr view)))))))
1051 (setq entries (cdr entries)))))
1053 (mime-view-read-mailcap-files)
1055 (ctree-set-calist-strictly
1056 'mime-acting-condition
1057 '((type . application)(subtype . octet-stream)
1059 (method . mime-detect-content)))
1061 (ctree-set-calist-with-default
1062 'mime-acting-condition
1063 '((mode . "extract")
1064 (method . mime-save-content)))
1066 (ctree-set-calist-strictly
1067 'mime-acting-condition
1068 '((type . text)(subtype . x-rot13-47)(mode . "play")
1069 (method . mime-view-caesar)))
1070 (ctree-set-calist-strictly
1071 'mime-acting-condition
1072 '((type . text)(subtype . x-rot13-47-48)(mode . "play")
1073 (method . mime-view-caesar)))
1075 (ctree-set-calist-strictly
1076 'mime-acting-condition
1077 '((type . message)(subtype . rfc822)(mode . "play")
1078 (method . mime-view-message/rfc822)))
1079 (ctree-set-calist-strictly
1080 'mime-acting-condition
1081 '((type . message)(subtype . partial)(mode . "play")
1082 (method . mime-store-message/partial-piece)))
1084 (ctree-set-calist-strictly
1085 'mime-acting-condition
1086 '((type . message)(subtype . external-body)
1087 ("access-type" . "anon-ftp")
1088 (method . mime-view-message/external-anon-ftp)))
1090 (ctree-set-calist-strictly
1091 'mime-acting-condition
1092 '((type . message)(subtype . external-body)
1093 ("access-type" . "url")
1094 (method . mime-view-message/external-url)))
1096 (ctree-set-calist-strictly
1097 'mime-acting-condition
1098 '((type . application)(subtype . octet-stream)
1099 (method . mime-save-content)))
1102 ;;; @ quitting method
1105 (defvar mime-preview-quitting-method-alist
1106 '((mime-show-message-mode
1107 . mime-preview-quitting-method-for-mime-show-message-mode))
1108 "Alist of major-mode vs. quitting-method of mime-view.")
1110 (defvar mime-preview-over-to-previous-method-alist nil
1111 "Alist of major-mode vs. over-to-previous-method of mime-view.")
1113 (defvar mime-preview-over-to-next-method-alist nil
1114 "Alist of major-mode vs. over-to-next-method of mime-view.")
1117 ;;; @ following method
1120 (defvar mime-preview-following-method-alist nil
1121 "Alist of major-mode vs. following-method of mime-view.")
1123 (defvar mime-view-following-required-fields-list
1130 (defun mime-display-entity (entity &optional situation
1131 default-situation preview-buffer)
1133 (setq preview-buffer (current-buffer)))
1134 (let* (e nb ne nhb nbb)
1135 (in-calist-package 'mime-view)
1138 (mime-find-entity-preview-situation entity default-situation)))
1139 (let ((button-is-invisible
1140 (eq (cdr (or (assq '*entity-button situation)
1141 (assq 'entity-button situation)))
1144 (eq (cdr (or (assq '*header situation)
1145 (assq 'header situation)))
1148 (eq (cdr (or (assq '*body situation)
1149 (assq 'body situation)))
1151 (children (mime-entity-children entity)))
1152 (set-buffer preview-buffer)
1154 (narrow-to-region nb nb)
1155 (or button-is-invisible
1156 ;; (if (mime-view-entity-button-visible-p entity)
1157 (mime-view-insert-entity-button entity)
1160 (if header-is-visible
1161 (let ((header-presentation-method
1162 (or (cdr (assq 'header-presentation-method situation))
1163 (cdr (assq (cdr (assq 'major-mode situation))
1164 mime-header-presentation-method-alist)))))
1166 (if header-presentation-method
1167 (funcall header-presentation-method entity situation)
1168 (mime-insert-header entity
1169 mime-view-ignored-field-list
1170 mime-view-visible-field-list))
1171 (mime-add-url-buttons)
1172 (run-hooks 'mime-display-header-hook)
1173 (put-text-property nhb (point-max) 'mime-view-entity-header entity)
1174 (goto-char (point-max))
1179 (let ((body-presentation-method
1180 (cdr (assq 'body-presentation-method situation))))
1181 (if (functionp body-presentation-method)
1182 (funcall body-presentation-method entity situation)
1183 (mime-display-text/plain entity situation)))
1184 (when button-is-invisible
1185 (goto-char (point-max))
1186 (mime-view-insert-entity-button entity))
1187 (unless header-is-visible
1188 (goto-char (point-max))
1190 (setq ne (point-max))
1192 (put-text-property nb ne 'mime-view-entity entity)
1193 (put-text-property nb ne 'mime-view-situation situation)
1194 (put-text-property nbb ne 'mime-view-entity-body entity)
1196 (if (and children body-is-visible)
1197 (let ((body-presentation-method
1198 (cdr (assq 'body-presentation-method situation))))
1199 (if (functionp body-presentation-method)
1200 (funcall body-presentation-method entity situation)
1201 (mime-display-multipart/mixed entity situation)))))))
1204 ;;; @ MIME viewer mode
1207 (defconst mime-view-popup-menu-list
1209 ["Move to upper entity" mime-preview-move-to-upper]
1210 ["Move to previous entity" mime-preview-move-to-previous]
1211 ["Move to next entity" mime-preview-move-to-next]
1212 ["Scroll-down" mime-preview-scroll-down-entity]
1213 ["Scroll-up" mime-preview-scroll-up-entity]
1214 ["Play current entity" mime-preview-play-current-entity]
1215 ["Extract current entity" mime-preview-extract-current-entity]
1216 ["Print current entity" mime-preview-print-current-entity])
1217 "Menu for MIME Viewer")
1219 (defun mime-view-popup-menu (event)
1220 "Popup the menu in the MIME Viewer buffer"
1222 (mime-popup-menu-popup mime-view-popup-menu-list event))
1224 ;;; The current local map is taken precendence over `widget-keymap',
1225 ;;; because GNU Emacs' widget implementation doesn't set `local-map' property.
1226 ;;; So we need to specify derivation.
1227 (defvar widget-keymap)
1228 (defun mime-view-maybe-inherit-widget-keymap ()
1229 (when (boundp 'widget-keymap)
1230 (set-keymap-parent (current-local-map) widget-keymap)))
1232 (add-hook 'mime-view-mode-hook 'mime-view-maybe-inherit-widget-keymap)
1234 (defun mime-view-define-keymap (&optional default)
1235 (let ((mime-view-mode-map (if (keymapp default)
1236 (copy-keymap default)
1237 (make-sparse-keymap))))
1238 (define-key mime-view-mode-map
1239 "u" (function mime-preview-move-to-upper))
1240 (define-key mime-view-mode-map
1241 "p" (function mime-preview-move-to-previous))
1242 (define-key mime-view-mode-map
1243 "n" (function mime-preview-move-to-next))
1244 (define-key mime-view-mode-map
1245 "\e\t" (function mime-preview-move-to-previous))
1246 (define-key mime-view-mode-map
1247 "\t" (function mime-preview-move-to-next))
1248 (define-key mime-view-mode-map
1249 " " (function mime-preview-scroll-up-entity))
1250 (define-key mime-view-mode-map
1251 "\M- " (function mime-preview-scroll-down-entity))
1252 (define-key mime-view-mode-map
1253 "\177" (function mime-preview-scroll-down-entity))
1254 (define-key mime-view-mode-map
1255 "\C-m" (function mime-preview-next-line-entity))
1256 (define-key mime-view-mode-map
1257 "\C-\M-m" (function mime-preview-previous-line-entity))
1258 (define-key mime-view-mode-map
1259 "v" (function mime-preview-play-current-entity))
1260 (define-key mime-view-mode-map
1261 "e" (function mime-preview-extract-current-entity))
1262 (define-key mime-view-mode-map
1263 "\C-c\C-p" (function mime-preview-print-current-entity))
1265 (define-key mime-view-mode-map
1266 "\C-c\C-t\C-f" (function mime-preview-toggle-header))
1267 (define-key mime-view-mode-map
1268 "\C-c\C-th" (function mime-preview-toggle-header))
1269 (define-key mime-view-mode-map
1270 "\C-c\C-t\C-c" (function mime-preview-toggle-content))
1272 (define-key mime-view-mode-map
1273 "\C-c\C-v\C-f" (function mime-preview-show-header))
1274 (define-key mime-view-mode-map
1275 "\C-c\C-vh" (function mime-preview-show-header))
1276 (define-key mime-view-mode-map
1277 "\C-c\C-v\C-c" (function mime-preview-show-content))
1279 (define-key mime-view-mode-map
1280 "\C-c\C-d\C-f" (function mime-preview-hide-header))
1281 (define-key mime-view-mode-map
1282 "\C-c\C-dh" (function mime-preview-hide-header))
1283 (define-key mime-view-mode-map
1284 "\C-c\C-d\C-c" (function mime-preview-hide-content))
1286 (define-key mime-view-mode-map
1287 "a" (function mime-preview-follow-current-entity))
1288 (define-key mime-view-mode-map
1289 "q" (function mime-preview-quit))
1290 (define-key mime-view-mode-map
1291 "\C-c\C-x" (function mime-preview-kill-buffer))
1292 ;; (define-key mime-view-mode-map
1293 ;; "<" (function beginning-of-buffer))
1294 ;; (define-key mime-view-mode-map
1295 ;; ">" (function end-of-buffer))
1296 (define-key mime-view-mode-map
1297 "?" (function describe-mode))
1298 (define-key mime-view-mode-map
1299 [tab] (function mime-preview-move-to-next))
1300 (define-key mime-view-mode-map
1301 [delete] (function mime-preview-scroll-down-entity))
1302 (define-key mime-view-mode-map
1303 [backspace] (function mime-preview-scroll-down-entity))
1304 (if (functionp default)
1305 (if (featurep 'xemacs)
1306 (set-keymap-default-binding mime-view-mode-map default)
1307 (setq mime-view-mode-map
1308 (append mime-view-mode-map (list (cons t default))))))
1309 (define-key mime-view-mode-map
1310 [down-mouse-3] (function mime-view-popup-menu))
1311 ;; (run-hooks 'mime-view-define-keymap-hook)
1312 mime-view-mode-map))
1314 (defvar mime-view-mode-default-map (mime-view-define-keymap))
1317 (defsubst mime-maybe-hide-echo-buffer ()
1318 "Clear mime-echo buffer and delete window for it."
1319 (let ((buf (get-buffer mime-echo-buffer-name)))
1324 (let ((win (get-buffer-window buf)))
1326 (delete-window win)))
1327 (bury-buffer buf)))))
1329 (defvar mime-view-redisplay nil)
1332 (defun mime-display-message (message &optional preview-buffer
1333 mother default-keymap-or-function
1334 original-major-mode keymap)
1335 "View MESSAGE in MIME-View mode.
1337 Optional argument PREVIEW-BUFFER specifies the buffer of the
1338 presentation. It must be either nil or a name of preview buffer.
1340 Optional argument MOTHER specifies mother-buffer of the preview-buffer.
1342 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
1343 function. If it is a keymap, keymap of MIME-View mode will be added
1344 to it. If it is a function, it will be bound as default binding of
1345 keymap of MIME-View mode.
1347 Optional argument ORIGINAL-MAJOR-MODE is major-mode of representation
1348 buffer of MESSAGE. If it is nil, current `major-mode' is used.
1350 Optional argument KEYMAP is keymap of MIME-View mode. If it is
1351 non-nil, DEFAULT-KEYMAP-OR-FUNCTION is ignored. If it is nil,
1352 `mime-view-mode-default-map' is used."
1353 (mime-maybe-hide-echo-buffer)
1354 (let ((win-conf (current-window-configuration)))
1356 (setq preview-buffer
1357 (concat "*Preview-" (mime-entity-name message) "*")))
1358 (or original-major-mode
1359 (setq original-major-mode major-mode))
1360 (let ((inhibit-read-only t))
1361 (set-buffer (get-buffer-create preview-buffer))
1365 (setq mime-mother-buffer mother))
1366 (setq mime-preview-original-window-configuration win-conf)
1367 (setq major-mode 'mime-view-mode)
1368 (setq mode-name "MIME-View")
1369 (mime-display-entity message nil
1370 `((entity-button . invisible)
1372 (major-mode . ,original-major-mode))
1376 (if default-keymap-or-function
1377 (mime-view-define-keymap default-keymap-or-function)
1378 mime-view-mode-default-map)))
1380 (next-single-property-change (point-min) 'mime-view-entity)))
1383 (goto-char (point-min))
1384 (search-forward "\n\n" nil t)))
1385 (run-hooks 'mime-view-mode-hook)
1386 (set-buffer-modified-p nil)
1387 (setq buffer-read-only t)
1391 (defun mime-view-buffer (&optional raw-buffer preview-buffer mother
1392 default-keymap-or-function
1393 representation-type)
1394 "View RAW-BUFFER in MIME-View mode.
1395 Optional argument PREVIEW-BUFFER is either nil or a name of preview
1397 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
1398 function. If it is a keymap, keymap of MIME-View mode will be added
1399 to it. If it is a function, it will be bound as default binding of
1400 keymap of MIME-View mode.
1401 Optional argument REPRESENTATION-TYPE is representation-type of
1402 message. It must be nil, `binary' or `cooked'. If it is nil,
1403 `cooked' is used as default."
1406 (setq raw-buffer (current-buffer)))
1407 (or representation-type
1408 (setq representation-type
1410 (set-buffer raw-buffer)
1411 (cdr (or (assq major-mode mime-raw-representation-type-alist)
1412 (assq t mime-raw-representation-type-alist))))))
1413 (if (eq representation-type 'binary)
1414 (setq representation-type 'buffer))
1415 (setq preview-buffer (mime-display-message
1416 (mime-open-entity representation-type raw-buffer)
1417 preview-buffer mother default-keymap-or-function))
1418 (or (get-buffer-window preview-buffer)
1419 (let ((r-win (get-buffer-window raw-buffer)))
1421 (set-window-buffer r-win preview-buffer)
1422 (let ((m-win (and mother (get-buffer-window mother))))
1424 (set-window-buffer m-win preview-buffer)
1425 (switch-to-buffer preview-buffer)))))))
1427 (defun mime-view-mode (&optional mother ctl encoding
1428 raw-buffer preview-buffer
1429 default-keymap-or-function)
1430 "Major mode for viewing MIME message.
1432 Here is a list of the standard keys for mime-view-mode.
1437 u Move to upper content
1438 p or M-TAB Move to previous content
1439 n or TAB Move to next content
1440 SPC Scroll up or move to next content
1441 M-SPC or DEL Scroll down or move to previous content
1442 RET Move to next line
1443 M-RET Move to previous line
1444 v Decode current content as `play mode'
1445 e Decode current content as `extract mode'
1446 C-c C-p Decode current content as `print mode'
1447 a Followup to current content.
1449 button-2 Move to point under the mouse cursor
1450 and decode current content as `play mode'
1453 (unless mime-view-redisplay
1455 (if raw-buffer (set-buffer raw-buffer))
1458 (or (assq major-mode mime-raw-representation-type-alist)
1459 (assq t mime-raw-representation-type-alist)))))
1460 (if (eq type 'binary)
1461 (setq type 'buffer))
1462 (setq mime-message-structure (mime-open-entity type raw-buffer))
1463 (or (mime-entity-content-type mime-message-structure)
1464 (mime-entity-set-content-type mime-message-structure ctl)))
1465 (or (mime-entity-encoding mime-message-structure)
1466 (mime-entity-set-encoding mime-message-structure encoding))))
1467 (mime-display-message mime-message-structure preview-buffer
1468 mother default-keymap-or-function))
1474 (defun mime-preview-find-boundary-info (&optional with-children)
1475 "Return boundary information of current part.
1476 If WITH-CHILDREN, refer boundary surrounding current part and its branches."
1482 (get-text-property (point) 'mime-view-entity)))
1483 (> (point) (point-min)))
1485 (setq p-beg (previous-single-property-change (point) 'mime-view-entity))
1486 (setq entity-node-id (and entity (mime-entity-node-id entity)))
1487 (setq len (length entity-node-id))
1490 (if (eq (next-single-property-change (point-min)
1495 ((eq (next-single-property-change p-beg 'mime-view-entity)
1497 (setq p-beg (point))))
1498 (setq p-end (next-single-property-change p-beg 'mime-view-entity))
1500 (setq p-end (point-max)))
1501 ((null entity-node-id)
1502 (setq p-end (point-max)))
1508 (next-single-property-change
1509 (point) 'mime-view-entity))
1511 (let ((rc (mime-entity-node-id
1512 (get-text-property (point)
1513 'mime-view-entity))))
1514 (or (and (>= (setq i (- (length rc) len)) 0)
1515 (equal entity-node-id (nthcdr i rc)))
1517 (setq p-end (or (next-single-property-change
1518 (point) 'mime-view-entity)
1520 (setq p-end (point-max))))))
1521 (vector p-beg p-end entity)))
1527 (autoload 'mime-preview-play-current-entity "mime-play"
1528 "Play current entity." t)
1530 (defun mime-preview-extract-current-entity (&optional ignore-examples)
1531 "Extract current entity into file (maybe).
1532 It decodes current entity to call internal or external method as
1533 \"extract\" mode. The method is selected from variable
1534 `mime-acting-condition'."
1536 (mime-preview-play-current-entity ignore-examples "extract"))
1538 (defun mime-preview-print-current-entity (&optional ignore-examples)
1539 "Print current entity (maybe).
1540 It decodes current entity to call internal or external method as
1541 \"print\" mode. The method is selected from variable
1542 `mime-acting-condition'."
1544 (mime-preview-play-current-entity ignore-examples "print"))
1550 (defun mime-preview-follow-current-entity ()
1551 "Write follow message to current entity.
1552 It calls following-method selected from variable
1553 `mime-preview-following-method-alist'."
1555 (let* ((boundary-info (mime-preview-find-boundary-info t))
1556 (p-beg (aref boundary-info 0))
1557 (p-end (aref boundary-info 1))
1558 (entity (aref boundary-info 2))
1560 (if (or (get-text-property p-beg 'mime-view-entity-body)
1564 (next-single-property-change
1565 p-beg 'mime-view-entity-body nil
1566 (or (next-single-property-change p-beg 'mime-view-entity)
1568 (let* ((mode (mime-preview-original-major-mode 'recursive))
1569 (entity-node-id (and entity (mime-entity-node-id entity)))
1571 (format "%s-%s" (buffer-name) (reverse entity-node-id)))
1573 (the-buf (current-buffer))
1576 (set-buffer (setq new-buf (get-buffer-create new-name)))
1579 (insert-buffer-substring the-buf pb-beg p-end)
1580 (goto-char (point-min))
1581 (let ((current-entity
1583 (eq (mime-entity-media-type entity) 'message)
1584 (eq (mime-entity-media-subtype entity) 'rfc822))
1585 (car (mime-entity-children entity))
1587 (while (and current-entity
1588 (if (and (eq (mime-entity-media-type
1589 current-entity) 'message)
1590 (eq (mime-entity-media-subtype
1591 current-entity) 'rfc822))
1593 (mime-insert-header current-entity fields)
1595 (setq fields (std11-collect-field-names)
1596 current-entity (mime-entity-parent current-entity))))
1597 (let ((rest mime-view-following-required-fields-list)
1600 (setq field-name (car rest))
1601 (or (std11-field-body field-name)
1604 (set-buffer the-buf)
1605 (let ((entity (when mime-mother-buffer
1606 (set-buffer mime-mother-buffer)
1607 (get-text-property (point)
1608 'mime-view-entity))))
1610 (null (setq ret (mime-entity-fetch-field
1611 entity field-name))))
1612 (setq entity (mime-entity-parent entity)))))
1614 (insert (concat field-name ": " ret "\n")))))
1615 (setq rest (cdr rest)))))
1616 (let ((f (cdr (assq mode mime-preview-following-method-alist))))
1620 "Sorry, following method for %s is not implemented yet."
1627 (defun mime-preview-move-to-upper ()
1628 "Move to upper entity.
1629 If there is no upper entity, call function `mime-preview-quit'."
1632 (while (null (setq cinfo
1633 (get-text-property (point) 'mime-view-entity)))
1635 (let ((r (mime-entity-parent cinfo))
1638 (while (setq point (previous-single-property-change
1639 (point) 'mime-view-entity))
1641 (when (eq r (get-text-property (point) 'mime-view-entity))
1642 (if (or (eq mime-preview-move-scroll t)
1643 (and mime-preview-move-scroll
1646 (move-to-window-line -1)
1647 (forward-line (* -1 next-screen-context-lines))
1650 (recenter next-screen-context-lines))
1652 (mime-preview-quit)))))
1654 (defun mime-preview-move-to-previous ()
1655 "Move to previous entity.
1656 If there is no previous entity, it calls function registered in
1657 variable `mime-preview-over-to-previous-method-alist'."
1659 (while (and (not (bobp))
1660 (null (get-text-property (point) 'mime-view-entity)))
1662 (let ((point (previous-single-property-change (point) 'mime-view-entity)))
1664 (>= point (point-min)))
1665 (if (get-text-property (1- point) 'mime-view-entity)
1666 (progn (goto-char point)
1668 (or (eq mime-preview-move-scroll t)
1669 (and mime-preview-move-scroll
1672 (move-to-window-line 0)
1673 (forward-line next-screen-context-lines)
1676 (recenter (* -1 next-screen-context-lines))))
1677 (goto-char (1- point))
1678 (mime-preview-move-to-previous))
1679 (let ((f (assq (mime-preview-original-major-mode)
1680 mime-preview-over-to-previous-method-alist)))
1682 (funcall (cdr f)))))))
1684 (defun mime-preview-move-to-next ()
1685 "Move to next entity.
1686 If there is no previous entity, it calls function registered in
1687 variable `mime-preview-over-to-next-method-alist'."
1689 (while (and (not (eobp))
1690 (null (get-text-property (point) 'mime-view-entity)))
1692 (let ((point (next-single-property-change (point) 'mime-view-entity)))
1694 (<= point (point-max)))
1697 (if (null (get-text-property point 'mime-view-entity))
1698 (mime-preview-move-to-next)
1700 (or (eq mime-preview-move-scroll t)
1701 (and mime-preview-move-scroll
1704 (move-to-window-line -1)
1706 (* -1 next-screen-context-lines))
1709 (recenter next-screen-context-lines))))
1710 (let ((f (assq (mime-preview-original-major-mode)
1711 mime-preview-over-to-next-method-alist)))
1713 (funcall (cdr f)))))))
1715 (defun mime-preview-scroll-up-entity (&optional h)
1716 "Scroll up current entity.
1717 If reached to (point-max), it calls function registered in variable
1718 `mime-preview-over-to-next-method-alist'."
1721 (let ((f (assq (mime-preview-original-major-mode)
1722 mime-preview-over-to-next-method-alist)))
1726 (or (next-single-property-change (point) 'mime-view-entity)
1728 (bottom (window-end (selected-window))))
1731 (progn (goto-char point)
1732 (recenter next-screen-context-lines))
1736 (goto-char (point-max))))))))
1738 (defun mime-preview-scroll-down-entity (&optional h)
1739 "Scroll down current entity.
1740 If reached to (point-min), it calls function registered in variable
1741 `mime-preview-over-to-previous-method-alist'."
1744 (let ((f (assq (mime-preview-original-major-mode)
1745 mime-preview-over-to-previous-method-alist)))
1749 (or (previous-single-property-change (point) 'mime-view-entity)
1751 (top (window-start (selected-window))))
1754 (progn (goto-char point)
1755 (recenter (* -1 next-screen-context-lines)))
1758 (beginning-of-buffer
1759 (goto-char (point-min))))))))
1761 (defun mime-preview-next-line-entity (&optional lines)
1762 "Scroll up one line (or prefix LINES lines).
1763 If LINES is negative, scroll down LINES lines."
1765 (mime-preview-scroll-up-entity (or lines 1)))
1767 (defun mime-preview-previous-line-entity (&optional lines)
1768 "Scrroll down one line (or prefix LINES lines).
1769 If LINES is negative, scroll up LINES lines."
1771 (mime-preview-scroll-down-entity (or lines 1)))
1777 (defun mime-view-guess-encoding (entity situation)
1778 (or (cdr (assq '*encoding situation))
1779 (cdr (assq 'encoding situation))
1780 (mime-entity-encoding entity)
1783 (defun mime-view-read-encoding (entity situation)
1784 (let* ((default-encoding
1785 (mime-view-guess-encoding entity situation))
1788 "Content Transfer Encoding: "
1789 (mime-encoding-alist) nil t default-encoding)))
1790 (unless (or (string= encoding "")
1791 (string= encoding default-encoding))
1794 (defun mime-view-guess-charset (entity situation)
1795 (or (static-if (fboundp 'coding-system-to-mime-charset)
1796 ;; might be overridden by `universal-coding-system-argument'.
1797 (and coding-system-for-read
1798 (coding-system-to-mime-charset coding-system-for-read)))
1799 (cdr (assq '*charset situation))
1800 (cdr (assq 'charset situation))
1801 (let ((charset (cdr (assoc "charset" (mime-entity-parameters entity)))))
1803 (intern (downcase charset))))
1804 default-mime-charset))
1806 (defun mime-view-read-charset (entity situation)
1807 (static-if (featurep 'mule)
1808 (let* ((default-charset
1809 (mime-view-guess-charset entity situation))
1811 (intern (completing-read "MIME-charset: "
1814 (list (symbol-name sym)))
1815 (mime-charset-list))
1817 (symbol-name default-charset)))))
1818 (unless (eq charset default-charset)
1822 (defun mime-preview-toggle-display (type &optional display)
1823 (let ((situation (mime-preview-find-boundary-info t))
1824 (sym (intern (concat "*" (symbol-name type))))
1825 entity p-beg p-end encoding charset)
1826 (setq p-beg (aref situation 0)
1827 p-end (aref situation 1)
1828 entity (aref situation 2)
1829 situation (get-text-property p-beg 'mime-view-situation))
1830 (cond ((eq display 'invisible)
1835 (memq (cdr (or (assq sym situation)
1836 (assq type situation)))
1837 '(nil invisible)))))
1838 (setq situation (put-alist sym (if display
1842 (when (and current-prefix-arg
1843 (eq (cdr (assq sym situation)) 'visible))
1844 (if (setq encoding (mime-view-read-encoding entity situation))
1845 (setq situation (put-alist '*encoding encoding situation)))
1846 (if (setq charset (mime-view-read-charset entity situation))
1847 (setq situation (put-alist '*charset charset situation))))
1849 (let ((inhibit-read-only t))
1850 (delete-region p-beg p-end)
1851 (mime-display-entity entity situation)))
1852 (let ((ret (assoc situation mime-preview-situation-example-list)))
1854 (setcdr ret (1+ (cdr ret)))
1855 (add-to-list 'mime-preview-situation-example-list
1856 (cons situation 0))))))
1858 (defun mime-preview-toggle-header (&optional force-visible)
1860 (mime-preview-toggle-display 'header force-visible))
1862 (defun mime-preview-toggle-content (&optional force-visible)
1864 (mime-preview-toggle-display 'body force-visible))
1866 (defun mime-preview-show-header ()
1868 (mime-preview-toggle-display 'header 'visible))
1870 (defun mime-preview-show-content ()
1872 (mime-preview-toggle-display 'body 'visible))
1874 (defun mime-preview-hide-header ()
1876 (mime-preview-toggle-display 'header 'invisible))
1878 (defun mime-preview-hide-content ()
1880 (mime-preview-toggle-display 'body 'invisible))
1886 (defun mime-preview-quit ()
1887 "Quit from MIME-preview buffer.
1888 It calls function registered in variable
1889 `mime-preview-quitting-method-alist'."
1891 (let ((r (assq (mime-preview-original-major-mode)
1892 mime-preview-quitting-method-alist)))
1894 (funcall (cdr r)))))
1896 (defun mime-preview-kill-buffer ()
1898 (kill-buffer (current-buffer)))
1904 (provide 'mime-view)
1907 (setq mime-situation-examples-file nil)
1908 ;; to avoid to read situation-examples-file at compile time.
1911 (mime-view-read-situation-examples-file)
1913 ;;; mime-view.el ends here