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., 59 Temple Place - Suite 330,
26 ;; Boston, MA 02111-1307, USA.
36 (eval-when-compile (require 'static))
42 (defconst mime-view-version
43 (concat (mime-product-name mime-user-interface-product) " MIME-View "
44 (mapconcat #'number-to-string
45 (mime-product-version mime-user-interface-product) ".")
46 " (" (mime-product-code-name mime-user-interface-product) ")"))
52 (defgroup mime-view nil
56 (defcustom mime-situation-examples-file "~/.mime-example"
57 "*File name of situation-examples demonstrated by user."
61 (defcustom mime-preview-move-scroll nil
62 "*Decides whether to scroll when moving to next entity.
63 When t, scroll the buffer. Non-nil but not t means scroll when
64 the next entity is within next-screen-context-lines from top or
65 buttom. Nil means don't scroll at all."
67 :type '(choice (const :tag "Off" nil)
69 (sexp :tag "Situation" 1)))
71 (defcustom mime-view-mailcap-files
72 (let ((files '("/etc/mailcap" "/usr/etc/mailcap" "~/.mailcap")))
73 (or (member mime-mailcap-file files)
74 (setq files (cons mime-mailcap-file files)))
76 "List of mailcap files."
81 ;;; @ in raw-buffer (representation space)
84 (defvar mime-preview-buffer nil
85 "MIME-preview buffer corresponding with the (raw) buffer.")
86 (make-variable-buffer-local 'mime-preview-buffer)
89 (defvar mime-raw-representation-type-alist
90 '((mime-show-message-mode . binary)
91 (mime-temp-message-mode . binary)
94 "Alist of major-mode vs. representation-type of mime-raw-buffer.
95 Each element looks like (SYMBOL . REPRESENTATION-TYPE). SYMBOL is
96 major-mode or t. t means default. REPRESENTATION-TYPE must be
97 `binary' or `cooked'.")
100 ;;; @ in preview-buffer (presentation space)
103 (defvar mime-mother-buffer nil
104 "Mother buffer corresponding with the (MIME-preview) buffer.
105 If current MIME-preview buffer is generated by other buffer, such as
106 message/partial, it is called `mother-buffer'.")
107 (make-variable-buffer-local 'mime-mother-buffer)
109 ;; (defvar mime-raw-buffer nil
110 ;; "Raw buffer corresponding with the (MIME-preview) buffer.")
111 ;; (make-variable-buffer-local 'mime-raw-buffer)
113 (defvar mime-preview-original-window-configuration nil
114 "Window-configuration before mime-view-mode is called.")
115 (make-variable-buffer-local 'mime-preview-original-window-configuration)
117 (defun mime-preview-original-major-mode (&optional recursive point)
118 "Return major-mode of original buffer.
119 If optional argument RECURSIVE is non-nil and current buffer has
120 mime-mother-buffer, it returns original major-mode of the
122 (if (and recursive mime-mother-buffer)
124 (set-buffer mime-mother-buffer)
125 (mime-preview-original-major-mode recursive)
127 (cdr (assq 'major-mode
128 (get-text-property (or point
129 (if (> (point) (buffer-size))
130 (max (1- (point-max)) (point-min))
132 'mime-view-situation)))))
135 ;;; @ entity information
138 (defun mime-entity-situation (entity &optional situation)
139 "Return situation of ENTITY."
140 (let (rest param name)
142 (unless (assq 'type situation)
143 (setq rest (or (mime-entity-content-type entity)
144 (make-mime-content-type 'text 'plain))
145 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)
156 (setq param (car rest))
157 (or (assoc (car param) situation)
158 (setq situation (cons param situation)))
159 (setq rest (cdr rest)))
161 ;; Content-Disposition
163 (unless (assq 'disposition-type situation)
164 (setq rest (mime-entity-content-disposition entity))
166 (setq situation (cons (cons 'disposition-type
167 (mime-content-disposition-type rest))
169 rest (mime-content-disposition-parameters rest))
172 (setq param (car rest)
174 (if (cond ((string= name "filename")
175 (if (assq 'filename situation)
177 (setq name 'filename)))
178 ((string= name "creation-date")
179 (if (assq 'creation-date situation)
181 (setq name 'creation-date)))
182 ((string= name "modification-date")
183 (if (assq 'modification-date situation)
185 (setq name 'modification-date)))
186 ((string= name "read-date")
187 (if (assq 'read-date situation)
189 (setq name 'read-date)))
190 ((string= name "size")
191 (if (assq 'size situation)
194 (t (setq name (cons 'disposition name))
195 (if (assoc name situation)
199 (cons (cons name (cdr param))
201 (setq rest (cdr rest)))
203 ;; Content-Transfer-Encoding
204 (or (assq 'encoding situation)
206 (cons (cons 'encoding (or (mime-entity-encoding entity)
212 (defsubst mime-delq-null-situation (situations field
213 &rest ignored-values)
216 (let* ((situation (car situations))
217 (cell (assq field situation)))
219 (or (memq (cdr cell) ignored-values)
220 (setq dest (cons situation dest))
222 (setq situations (cdr situations)))
225 (defun mime-compare-situation-with-example (situation example)
226 (let ((example (copy-alist example))
229 (let* ((cell (car situation))
231 (ecell (assoc key example)))
233 (if (equal cell ecell)
234 (setq match (1+ match))
235 (setq example (delq ecell example))
238 (setq situation (cdr situation))
243 (defun mime-sort-situation (situation)
253 (disposition-type . 6)
257 (let ((ret (assq a-t order)))
259 (setq a-order (cdr ret))
265 (let ((ret (assq b-t order)))
267 (setq b-order (cdr ret))
272 (if (= a-order b-order)
273 (string< (format "%s" a-t)(format "%s" b-t))
278 (defun mime-unify-situations (entity-situation
279 condition situation-examples
280 &optional required-name ignored-value
283 (in-calist-package 'mime-view)
285 (ctree-find-calist condition entity-situation
288 (setq ret (mime-delq-null-situation ret required-name
290 (or (assq 'ignore-examples entity-situation)
298 (let ((situation (car rest))
299 (examples situation-examples))
302 (mime-compare-situation-with-example
303 situation (caar examples)))
304 (ret-score (car ret)))
305 (cond ((> ret-score max-score)
306 (setq max-score ret-score
307 max-escore (cdar examples)
308 max-examples (list (cdr ret))
309 max-situations (list situation))
311 ((= ret-score max-score)
312 (cond ((> (cdar examples) max-escore)
313 (setq max-escore (cdar examples)
314 max-examples (list (cdr ret))
315 max-situations (list situation))
317 ((= (cdar examples) max-escore)
319 (cons (cdr ret) max-examples))
320 (or (member situation max-situations)
322 (cons situation max-situations)))
324 (setq examples (cdr examples))))
325 (setq rest (cdr rest)))
327 (setq ret max-situations)
329 (let* ((example (car max-examples))
331 (assoc example situation-examples)))
333 (setcdr cell (1+ (cdr cell)))
334 (setq situation-examples
335 (cons (cons example 0)
338 (setq max-examples (cdr max-examples))
340 (cons ret situation-examples)
341 ;; ret: list of situations
342 ;; situation-examples: new examples (notoce that contents of
343 ;; argument `situation-examples' has bees modified)
346 (defun mime-view-entity-title (entity)
347 (or (mime-entity-read-field entity 'Content-Description)
348 (mime-entity-read-field entity 'Subject)
349 (mime-entity-filename entity)
352 (defvar mime-preview-situation-example-list nil)
353 (defvar mime-preview-situation-example-list-max-size 16)
354 ;; (defvar mime-preview-situation-example-condition nil)
356 (defun mime-find-entity-preview-situation (entity
357 &optional default-situation)
359 (mime-unify-situations
360 (append (mime-entity-situation entity)
362 mime-preview-condition
363 mime-preview-situation-example-list)))
364 (setq mime-preview-situation-example-list
370 (defvar mime-acting-situation-example-list nil)
371 (defvar mime-acting-situation-example-list-max-size 16)
372 (defvar mime-situation-examples-file-coding-system nil)
374 (defun mime-view-read-situation-examples-file (&optional file)
376 (setq file mime-situation-examples-file))
378 (file-readable-p file))
380 (insert-file-contents file)
381 (setq mime-situation-examples-file-coding-system
383 ((boundp 'buffer-file-coding-system)
384 (symbol-value 'buffer-file-coding-system))
385 ((boundp 'file-coding-system)
386 (symbol-value 'file-coding-system))
388 ;; (and (boundp 'buffer-file-coding-system)
389 ;; buffer-file-coding-system)
391 (condition-case error
393 (error (message "%s is broken: %s" file (cdr error))))
397 (while (and (> (length mime-preview-situation-example-list)
398 mime-preview-situation-example-list-max-size)
400 (setq mime-preview-situation-example-list
401 (mime-reduce-situation-examples
402 mime-preview-situation-example-list))
404 (error (setq mime-preview-situation-example-list nil)))
405 ;; (let ((rest mime-preview-situation-example-list))
407 ;; (ctree-set-calist-strictly 'mime-preview-condition
409 ;; (setq rest (cdr rest))))
412 (while (and (> (length mime-acting-situation-example-list)
413 mime-acting-situation-example-list-max-size)
415 (setq mime-acting-situation-example-list
416 (mime-reduce-situation-examples
417 mime-acting-situation-example-list))
419 (error (setq mime-acting-situation-example-list nil))))))
421 (defun mime-save-situation-examples ()
422 (if (or mime-preview-situation-example-list
423 mime-acting-situation-example-list)
424 (let ((file mime-situation-examples-file))
426 (insert ";;; " (file-name-nondirectory file) "\n")
427 (insert "\n;; This file is generated automatically by "
428 mime-view-version "\n\n")
429 (insert ";;; Code:\n\n")
430 (if mime-preview-situation-example-list
431 (pp `(setq mime-preview-situation-example-list
432 ',mime-preview-situation-example-list)
434 (if mime-acting-situation-example-list
435 (pp `(setq mime-acting-situation-example-list
436 ',mime-acting-situation-example-list)
439 (file-name-nondirectory file)
442 ((boundp 'buffer-file-coding-system)
443 (setq buffer-file-coding-system
444 mime-situation-examples-file-coding-system))
445 ((boundp 'file-coding-system)
446 (setq file-coding-system
447 mime-situation-examples-file-coding-system)))
448 ;; (setq buffer-file-coding-system
449 ;; mime-situation-examples-file-coding-system)
450 (setq buffer-file-name file)
453 (add-hook 'kill-emacs-hook 'mime-save-situation-examples)
455 (defun mime-reduce-situation-examples (situation-examples)
456 (let ((len (length situation-examples))
464 ir situation-examples)
468 jr situation-examples)
472 (setq ret (mime-compare-situation-with-example (car ic)(car jc))
474 det-ret (+ (length (car ic))(length (car jc)))
475 det-org (length (cdr ret))
476 freq (+ (cdr ic)(cdr jc)))
477 (cond ((< max-sim sim)
484 dest (cons (cdr ret) freq))
487 (cond ((> min-det-ret det-ret)
488 (setq min-det-ret det-ret
493 dest (cons (cdr ret) freq))
495 ((= min-det-ret det-ret)
496 (cond ((> min-det-org det-org)
497 (setq min-det-org det-org
501 dest (cons (cdr ret) freq))
503 ((= min-det-org det-org)
504 (cond ((> min-freq freq)
508 dest (cons (cdr ret) freq))
522 (setq jr (nthcdr (1- d-j) situation-examples))
523 (setcdr jr (cddr jr))
525 (setq situation-examples
526 (cdr situation-examples))
527 (setq ir (nthcdr (1- d-i) situation-examples))
528 (setcdr ir (cddr ir))
530 (if (setq ir (assoc (car dest) situation-examples))
532 (setcdr ir (+ (cdr ir)(cdr dest)))
534 (cons dest situation-examples)
535 ;; situation-examples may be modified.
539 ;;; @ presentation of preview
545 ;;; @@@ predicate function
548 ;; (defun mime-view-entity-button-visible-p (entity)
549 ;; "Return non-nil if header of ENTITY is visible.
550 ;; Please redefine this function if you want to change default setting."
551 ;; (let ((media-type (mime-entity-media-type entity))
552 ;; (media-subtype (mime-entity-media-subtype entity)))
553 ;; (or (not (eq media-type 'application))
554 ;; (and (not (eq media-subtype 'x-selection))
555 ;; (or (not (eq media-subtype 'octet-stream))
556 ;; (let ((mother-entity (mime-entity-parent entity)))
557 ;; (or (not (eq (mime-entity-media-type mother-entity)
559 ;; (not (eq (mime-entity-media-subtype mother-entity)
564 ;;; @@@ entity button generator
567 (defun mime-view-insert-entity-button (entity)
568 "Insert entity-button of ENTITY."
569 (let ((entity-node-id (mime-entity-node-id entity))
570 (params (mime-entity-parameters entity))
571 (subject (mime-view-entity-title entity)))
573 (let ((access-type (assoc "access-type" params))
574 (num (or (cdr (assoc "x-part-number" params))
575 (if (consp entity-node-id)
578 (format "%s" (1+ num))
580 (reverse entity-node-id) ".")
584 (let ((server (assoc "server" params)))
585 (setq access-type (cdr access-type))
587 (format "%s %s ([%s] %s)"
588 num subject access-type (cdr server))
589 (let ((site (cdr (assoc "site" params)))
590 (dir (cdr (assoc "directory" params)))
591 (url (cdr (assoc "url" params)))
594 (format "%s %s ([%s] %s)"
595 num subject access-type url)
596 (format "%s %s ([%s] %s:%s)"
597 num subject access-type site dir))
601 (let ((media-type (mime-entity-media-type entity))
602 (media-subtype (mime-entity-media-subtype entity))
603 (charset (cdr (assoc "charset" params)))
604 (encoding (mime-entity-encoding entity)))
608 (format " <%s/%s%s%s>"
609 media-type media-subtype
611 (concat "; " charset)
614 (concat " (" encoding ")")
616 (if (>= (+ (current-column)(length rest))(window-width))
620 (function mime-preview-play-current-entity))
627 (defvar mime-header-presentation-method-alist nil
628 "Alist of major mode vs. corresponding header-presentation-method functions.
629 Each element looks like (SYMBOL . FUNCTION).
630 SYMBOL must be major mode in raw-buffer or t. t means default.
631 Interface of FUNCTION must be (ENTITY SITUATION).")
633 (defvar mime-view-ignored-field-list
634 '(".*Received:" ".*Path:" ".*Id:" "^References:"
635 "^Replied:" "^Errors-To:"
636 "^Lines:" "^Sender:" ".*Host:" "^Xref:"
637 "^Content-Type:" "^Precedence:"
638 "^Status:" "^X-VM-.*:")
639 "All fields that match this list will be hidden in MIME preview buffer.
640 Each elements are regexp of field-name.")
642 (defvar mime-view-visible-field-list '("^Dnas.*:" "^Message-Id:")
643 "All fields that match this list will be displayed in MIME preview buffer.
644 Each elements are regexp of field-name.")
650 ;;; @@@ predicate function
653 (in-calist-package 'mime-view)
655 (defun mime-calist::field-match-method-as-default-rule (calist
656 field-type field-value)
657 (let ((s-field (assq field-type calist)))
658 (cond ((null s-field)
659 (cons (cons field-type field-value) calist)
663 (define-calist-field-match-method
664 'header #'mime-calist::field-match-method-as-default-rule)
666 (define-calist-field-match-method
667 'body #'mime-calist::field-match-method-as-default-rule)
670 (defvar mime-preview-condition nil
671 "Condition-tree about how to display entity.")
673 (ctree-set-calist-strictly
674 'mime-preview-condition '((type . application)(subtype . octet-stream)
677 (ctree-set-calist-strictly
678 'mime-preview-condition '((type . application)(subtype . octet-stream)
681 (ctree-set-calist-strictly
682 'mime-preview-condition '((type . application)(subtype . octet-stream)
686 (ctree-set-calist-strictly
687 'mime-preview-condition '((type . application)(subtype . pgp)
690 (ctree-set-calist-strictly
691 'mime-preview-condition '((type . application)(subtype . x-latex)
694 (ctree-set-calist-strictly
695 'mime-preview-condition '((type . application)(subtype . x-selection)
698 (ctree-set-calist-strictly
699 'mime-preview-condition '((type . application)(subtype . x-comment)
702 (ctree-set-calist-strictly
703 'mime-preview-condition '((type . message)(subtype . delivery-status)
706 (ctree-set-calist-strictly
707 'mime-preview-condition
709 (body-presentation-method . mime-display-text/plain)))
711 (ctree-set-calist-strictly
712 'mime-preview-condition
715 (body-presentation-method . mime-display-text/plain)))
717 (ctree-set-calist-strictly
718 'mime-preview-condition
719 '((type . text)(subtype . enriched)
721 (body-presentation-method . mime-display-text/enriched)))
723 (ctree-set-calist-strictly
724 'mime-preview-condition
725 '((type . text)(subtype . richtext)
727 (body-presentation-method . mime-display-text/richtext)))
729 (autoload 'mime-display-application/x-postpet "postpet")
731 (ctree-set-calist-strictly
732 'mime-preview-condition
733 '((type . application)(subtype . x-postpet)
735 (body-presentation-method . mime-display-application/x-postpet)))
737 (ctree-set-calist-strictly
738 'mime-preview-condition
739 '((type . text)(subtype . t)
741 (body-presentation-method . mime-display-text/plain)))
743 (ctree-set-calist-strictly
744 'mime-preview-condition
745 '((type . multipart)(subtype . alternative)
747 (body-presentation-method . mime-display-multipart/alternative)))
749 (ctree-set-calist-strictly
750 'mime-preview-condition
751 '((type . multipart)(subtype . related)
753 (body-presentation-method . mime-display-multipart/related)))
755 (ctree-set-calist-strictly
756 'mime-preview-condition
757 '((type . multipart)(subtype . t)
759 (body-presentation-method . mime-display-multipart/mixed)))
761 (ctree-set-calist-strictly
762 'mime-preview-condition
763 '((type . message)(subtype . partial)
765 (body-presentation-method . mime-display-message/partial-button)))
767 (ctree-set-calist-strictly
768 'mime-preview-condition
769 '((type . message)(subtype . rfc822)
771 (body-presentation-method . mime-display-multipart/mixed)
772 (childrens-situation (header . visible)
773 (entity-button . invisible))))
775 (ctree-set-calist-strictly
776 'mime-preview-condition
777 '((type . message)(subtype . news)
779 (body-presentation-method . mime-display-multipart/mixed)
780 (childrens-situation (header . visible)
781 (entity-button . invisible))))
784 ;;; @@@ entity presentation
787 (defun mime-display-text/plain (entity situation)
789 (narrow-to-region (point-max)(point-max))
791 (mime-insert-text-content entity)
793 (message "Can't decode current entity.")
795 (run-hooks 'mime-text-decode-hook)
796 (goto-char (point-max))
797 (if (not (eq (char-after (1- (point))) ?\n))
800 (mime-add-url-buttons)
801 (run-hooks 'mime-display-text/plain-hook)
804 (defun mime-display-text/richtext (entity situation)
806 (narrow-to-region (point-max)(point-max))
807 (mime-insert-text-content entity)
808 (run-hooks 'mime-text-decode-hook)
809 (let ((beg (point-min)))
810 (remove-text-properties beg (point-max) '(face nil))
811 (richtext-decode beg (point-max))
814 (defun mime-display-text/enriched (entity situation)
816 (narrow-to-region (point-max)(point-max))
817 (mime-insert-text-content entity)
818 (run-hooks 'mime-text-decode-hook)
819 (let ((beg (point-min)))
820 (remove-text-properties beg (point-max) '(face nil))
821 (enriched-decode beg (point-max))
825 (defvar mime-view-announcement-for-message/partial
826 (if (and (>= emacs-major-version 19) window-system)
828 \[[ This is message/partial style split message. ]]
829 \[[ Please press `v' key in this buffer ]]
830 \[[ or click here by mouse button-2. ]]"
832 \[[ This is message/partial style split message. ]]
833 \[[ Please press `v' key in this buffer. ]]"
836 (defun mime-display-message/partial-button (&optional entity situation)
838 (goto-char (point-max))
839 (if (not (search-backward "\n\n" nil t))
842 (goto-char (point-max))
843 (narrow-to-region (point-max)(point-max))
844 (insert mime-view-announcement-for-message/partial)
845 (mime-add-button (point-min)(point-max)
846 #'mime-preview-play-current-entity)
849 (defun mime-display-multipart/mixed (entity situation)
850 (let ((children (mime-entity-children entity))
851 (original-major-mode-cell (assq 'major-mode situation))
853 (cdr (assq 'childrens-situation situation))))
854 (if original-major-mode-cell
855 (setq default-situation
856 (cons original-major-mode-cell default-situation)))
858 (mime-display-entity (car children) nil default-situation)
859 (setq children (cdr children))
862 (defcustom mime-view-type-subtype-score-alist
863 '(((text . enriched) . 3)
864 ((text . richtext) . 2)
867 "Alist MEDIA-TYPE vs corresponding score.
868 MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t. t means default."
870 :type '(repeat (cons (choice :tag "Media-Type"
871 (cons :tag "Type/Subtype"
872 (symbol :tag "Primary-type")
873 (symbol :tag "Subtype"))
875 (const :tag "Default" t))
878 (defun mime-display-multipart/alternative (entity situation)
879 (let* ((children (mime-entity-children entity))
880 (original-major-mode-cell (assq 'major-mode situation))
882 (cdr (assq 'childrens-situation situation)))
887 (if original-major-mode-cell
888 (setq default-situation
889 (cons original-major-mode-cell default-situation)))
894 (mime-find-entity-preview-situation
895 child default-situation)))
896 (if (cdr (assq 'body-presentation-method situation))
901 (cdr (assq 'type situation))
902 (cdr (assq 'subtype situation)))
903 mime-view-type-subtype-score-alist)
905 (cdr (assq 'type situation))
906 mime-view-type-subtype-score-alist)
909 mime-view-type-subtype-score-alist)
911 (if (> score max-score)
921 (let ((child (car children))
922 (situation (car situations)))
923 (mime-display-entity child (if (= i p)
925 (put-alist 'body 'invisible
926 (copy-alist situation)))))
927 (setq children (cdr children)
928 situations (cdr situations)
931 (defun mime-display-multipart/related (entity situation)
932 (let* ((param-start (mime-parse-msg-id
933 (std11-lexical-analyze
935 (mime-content-type-parameters
936 (mime-entity-content-type entity)))))))
937 (start (or (and param-start (mime-find-entity-from-content-id
940 (car (mime-entity-children entity))))
941 (original-major-mode-cell (assq 'major-mode situation))
942 (default-situation (cdr (assq 'childrens-situation situation))))
943 (if original-major-mode-cell
944 (setq default-situation
945 (cons original-major-mode-cell default-situation)))
946 (mime-display-entity start nil default-situation)))
948 ;;; @ acting-condition
951 (defvar mime-acting-condition nil
952 "Condition-tree about how to process entity.")
954 (defun mime-view-read-mailcap-files (&optional files)
956 (setq files mime-view-mailcap-files))
959 (setq file (car files))
960 (if (file-readable-p file)
961 (setq entries (append entries (mime-parse-mailcap-file file))))
962 (setq files (cdr files)))
964 (let ((entry (car entries))
967 (let* ((field (car entry))
968 (field-type (car field)))
969 (cond ((eq field-type 'view) (setq view field))
970 ((eq field-type 'print) (setq print field))
971 ((memq field-type '(compose composetyped edit)))
972 (t (setq shared (cons field shared))))
974 (setq entry (cdr entry)))
975 (setq shared (nreverse shared))
976 (ctree-set-calist-with-default
977 'mime-acting-condition
978 (append shared (list '(mode . "play")(cons 'method (cdr view)))))
980 (ctree-set-calist-with-default
981 'mime-acting-condition
983 (list '(mode . "print")(cons 'method (cdr view)))))))
984 (setq entries (cdr entries)))))
986 (mime-view-read-mailcap-files)
988 (ctree-set-calist-strictly
989 'mime-acting-condition
990 '((type . application)(subtype . octet-stream)
992 (method . mime-detect-content)
995 (ctree-set-calist-with-default
996 'mime-acting-condition
998 (method . mime-save-content)))
1000 (ctree-set-calist-strictly
1001 'mime-acting-condition
1002 '((type . text)(subtype . x-rot13-47)(mode . "play")
1003 (method . mime-view-caesar)
1005 (ctree-set-calist-strictly
1006 'mime-acting-condition
1007 '((type . text)(subtype . x-rot13-47-48)(mode . "play")
1008 (method . mime-view-caesar)
1011 (ctree-set-calist-strictly
1012 'mime-acting-condition
1013 '((type . message)(subtype . rfc822)(mode . "play")
1014 (method . mime-view-message/rfc822)
1016 (ctree-set-calist-strictly
1017 'mime-acting-condition
1018 '((type . message)(subtype . partial)(mode . "play")
1019 (method . mime-store-message/partial-piece)
1022 (ctree-set-calist-strictly
1023 'mime-acting-condition
1024 '((type . message)(subtype . external-body)
1025 ("access-type" . "anon-ftp")
1026 (method . mime-view-message/external-anon-ftp)
1029 (ctree-set-calist-strictly
1030 'mime-acting-condition
1031 '((type . message)(subtype . external-body)
1032 ("access-type" . "url")
1033 (method . mime-view-message/external-url)
1036 (ctree-set-calist-strictly
1037 'mime-acting-condition
1038 '((type . application)(subtype . octet-stream)
1039 (method . mime-save-content)
1043 ;;; @ quitting method
1046 (defvar mime-preview-quitting-method-alist
1047 '((mime-show-message-mode
1048 . mime-preview-quitting-method-for-mime-show-message-mode))
1049 "Alist of major-mode vs. quitting-method of mime-view.")
1051 (defvar mime-preview-over-to-previous-method-alist nil
1052 "Alist of major-mode vs. over-to-previous-method of mime-view.")
1054 (defvar mime-preview-over-to-next-method-alist nil
1055 "Alist of major-mode vs. over-to-next-method of mime-view.")
1058 ;;; @ following method
1061 (defvar mime-preview-following-method-alist nil
1062 "Alist of major-mode vs. following-method of mime-view.")
1064 (defvar mime-view-following-required-fields-list
1071 (defun mime-display-entity (entity &optional situation
1072 default-situation preview-buffer)
1074 (setq preview-buffer (current-buffer)))
1075 (let* (e nb ne nhb nbb)
1076 (in-calist-package 'mime-view)
1079 (mime-find-entity-preview-situation entity default-situation)))
1080 (let ((button-is-invisible
1081 (eq (cdr (or (assq '*entity-button situation)
1082 (assq 'entity-button situation)))
1085 (eq (cdr (or (assq '*header situation)
1086 (assq 'header situation)))
1089 (eq (cdr (or (assq '*body situation)
1090 (assq 'body situation)))
1092 (children (mime-entity-children entity)))
1093 (set-buffer preview-buffer)
1095 (narrow-to-region nb nb)
1096 (or button-is-invisible
1097 ;; (if (mime-view-entity-button-visible-p entity)
1098 (mime-view-insert-entity-button entity)
1101 (if header-is-visible
1102 (let ((header-presentation-method
1103 (or (cdr (assq 'header-presentation-method situation))
1104 (cdr (assq (cdr (assq 'major-mode situation))
1105 mime-header-presentation-method-alist)))))
1107 (if header-presentation-method
1108 (funcall header-presentation-method entity situation)
1109 (mime-insert-header entity
1110 mime-view-ignored-field-list
1111 mime-view-visible-field-list))
1112 (run-hooks 'mime-display-header-hook)
1113 (put-text-property nhb (point-max) 'mime-view-entity-header entity)
1114 (goto-char (point-max))
1119 (let ((body-presentation-method
1120 (cdr (assq 'body-presentation-method situation))))
1121 (if (functionp body-presentation-method)
1122 (funcall body-presentation-method entity situation)
1123 (mime-display-text/plain entity situation)))
1124 (when button-is-invisible
1125 (goto-char (point-max))
1126 (mime-view-insert-entity-button entity)
1128 (unless header-is-visible
1129 (goto-char (point-max))
1132 (setq ne (point-max))
1134 (put-text-property nb ne 'mime-view-entity entity)
1135 (put-text-property nb ne 'mime-view-situation situation)
1136 (put-text-property nbb ne 'mime-view-entity-body entity)
1138 (if (and children body-is-visible)
1139 (let ((body-presentation-method
1140 (cdr (assq 'body-presentation-method situation))))
1141 (if (functionp body-presentation-method)
1142 (funcall body-presentation-method entity situation)
1143 (mime-display-multipart/mixed entity situation))))
1147 ;;; @ MIME viewer mode
1150 (defconst mime-view-menu-title "MIME-View")
1151 (defconst mime-view-menu-list
1152 '((up "Move to upper entity" mime-preview-move-to-upper)
1153 (previous "Move to previous entity" mime-preview-move-to-previous)
1154 (next "Move to next entity" mime-preview-move-to-next)
1155 (scroll-down "Scroll-down" mime-preview-scroll-down-entity)
1156 (scroll-up "Scroll-up" mime-preview-scroll-up-entity)
1157 (play "Play current entity" mime-preview-play-current-entity)
1158 (extract "Extract current entity" mime-preview-extract-current-entity)
1159 (print "Print current entity" mime-preview-print-current-entity)
1161 "Menu for MIME Viewer")
1163 (cond ((featurep 'xemacs)
1164 (defvar mime-view-xemacs-popup-menu
1165 (cons mime-view-menu-title
1168 (vector (nth 1 item)(nth 2 item) t)
1170 mime-view-menu-list)))
1171 (defun mime-view-xemacs-popup-menu (event)
1172 "Popup the menu in the MIME Viewer buffer"
1174 (select-window (event-window event))
1175 (set-buffer (event-buffer event))
1176 (popup-menu 'mime-view-xemacs-popup-menu))
1177 (defvar mouse-button-2 'button2)
1178 (defvar mouse-button-3 'button3)
1181 (defvar mime-view-popup-menu
1182 (let ((menu (make-sparse-keymap mime-view-menu-title)))
1186 (list (intern (nth 1 item)) 'menu-item
1187 (nth 1 item)(nth 2 item))
1189 mime-view-menu-list))))
1190 (defun mime-view-popup-menu (event)
1191 "Popup the menu in the MIME Viewer buffer"
1193 (let ((menu mime-view-popup-menu) events func)
1194 (setq events (x-popup-menu t menu))
1196 (setq func (lookup-key menu (apply #'vector events)))
1199 (defvar mouse-button-2 [mouse-2])
1200 (defvar mouse-button-3 [mouse-3])
1203 (defun mime-view-define-keymap (&optional default)
1204 (let ((mime-view-mode-map (if (keymapp default)
1205 (copy-keymap default)
1206 (make-sparse-keymap))))
1207 (define-key mime-view-mode-map
1208 "u" (function mime-preview-move-to-upper))
1209 (define-key mime-view-mode-map
1210 "p" (function mime-preview-move-to-previous))
1211 (define-key mime-view-mode-map
1212 "n" (function mime-preview-move-to-next))
1213 (define-key mime-view-mode-map
1214 "\e\t" (function mime-preview-move-to-previous))
1215 (define-key mime-view-mode-map
1216 "\t" (function mime-preview-move-to-next))
1217 (define-key mime-view-mode-map
1218 " " (function mime-preview-scroll-up-entity))
1219 (define-key mime-view-mode-map
1220 "\M- " (function mime-preview-scroll-down-entity))
1221 (define-key mime-view-mode-map
1222 "\177" (function mime-preview-scroll-down-entity))
1223 (define-key mime-view-mode-map
1224 "\C-m" (function mime-preview-next-line-entity))
1225 (define-key mime-view-mode-map
1226 "\C-\M-m" (function mime-preview-previous-line-entity))
1227 (define-key mime-view-mode-map
1228 "v" (function mime-preview-play-current-entity))
1229 (define-key mime-view-mode-map
1230 "e" (function mime-preview-extract-current-entity))
1231 (define-key mime-view-mode-map
1232 "\C-c\C-p" (function mime-preview-print-current-entity))
1234 (define-key mime-view-mode-map
1235 "\C-c\C-t\C-f" (function mime-preview-toggle-header))
1236 (define-key mime-view-mode-map
1237 "\C-c\C-th" (function mime-preview-toggle-header))
1238 (define-key mime-view-mode-map
1239 "\C-c\C-t\C-c" (function mime-preview-toggle-content))
1241 (define-key mime-view-mode-map
1242 "\C-c\C-v\C-f" (function mime-preview-show-header))
1243 (define-key mime-view-mode-map
1244 "\C-c\C-vh" (function mime-preview-show-header))
1245 (define-key mime-view-mode-map
1246 "\C-c\C-v\C-c" (function mime-preview-show-content))
1248 (define-key mime-view-mode-map
1249 "\C-c\C-d\C-f" (function mime-preview-hide-header))
1250 (define-key mime-view-mode-map
1251 "\C-c\C-dh" (function mime-preview-hide-header))
1252 (define-key mime-view-mode-map
1253 "\C-c\C-d\C-c" (function mime-preview-hide-content))
1255 (define-key mime-view-mode-map
1256 "a" (function mime-preview-follow-current-entity))
1257 (define-key mime-view-mode-map
1258 "q" (function mime-preview-quit))
1259 (define-key mime-view-mode-map
1260 "\C-c\C-x" (function mime-preview-kill-buffer))
1261 ;; (define-key mime-view-mode-map
1262 ;; "<" (function beginning-of-buffer))
1263 ;; (define-key mime-view-mode-map
1264 ;; ">" (function end-of-buffer))
1265 (define-key mime-view-mode-map
1266 "?" (function describe-mode))
1267 (define-key mime-view-mode-map
1268 [tab] (function mime-preview-move-to-next))
1269 (define-key mime-view-mode-map
1270 [delete] (function mime-preview-scroll-down-entity))
1271 (define-key mime-view-mode-map
1272 [backspace] (function mime-preview-scroll-down-entity))
1273 (if (functionp default)
1274 (cond ((featurep 'xemacs)
1275 (set-keymap-default-binding mime-view-mode-map default)
1278 (setq mime-view-mode-map
1279 (append mime-view-mode-map (list (cons t default))))
1282 (define-key mime-view-mode-map
1283 mouse-button-2 (function mime-button-dispatcher))
1285 (cond ((featurep 'xemacs)
1286 (define-key mime-view-mode-map
1287 mouse-button-3 (function mime-view-xemacs-popup-menu))
1289 ((>= emacs-major-version 19)
1290 (define-key mime-view-mode-map
1291 mouse-button-3 (function mime-view-popup-menu))
1292 (define-key mime-view-mode-map [menu-bar mime-view]
1293 (cons mime-view-menu-title
1294 (make-sparse-keymap mime-view-menu-title)))
1297 (define-key mime-view-mode-map
1298 (vector 'menu-bar 'mime-view (car item))
1299 (cons (nth 1 item)(nth 2 item)))
1301 (reverse mime-view-menu-list))
1303 ;; (run-hooks 'mime-view-define-keymap-hook)
1304 mime-view-mode-map))
1306 (defvar mime-view-mode-default-map (mime-view-define-keymap))
1309 (defsubst mime-maybe-hide-echo-buffer ()
1310 "Clear mime-echo buffer and delete window for it."
1311 (let ((buf (get-buffer mime-echo-buffer-name)))
1316 (let ((win (get-buffer-window buf)))
1323 (defvar mime-view-redisplay nil)
1326 (defun mime-display-message (message &optional preview-buffer
1327 mother default-keymap-or-function
1328 original-major-mode keymap)
1329 "View MESSAGE in MIME-View mode.
1331 Optional argument PREVIEW-BUFFER specifies the buffer of the
1332 presentation. It must be either nil or a name of preview buffer.
1334 Optional argument MOTHER specifies mother-buffer of the preview-buffer.
1336 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
1337 function. If it is a keymap, keymap of MIME-View mode will be added
1338 to it. If it is a function, it will be bound as default binding of
1339 keymap of MIME-View mode.
1341 Optional argument ORIGINAL-MAJOR-MODE is major-mode of representation
1342 buffer of MESSAGE. If it is nil, current `major-mode' is used.
1344 Optional argument KEYMAP is keymap of MIME-View mode. If it is
1345 non-nil, DEFAULT-KEYMAP-OR-FUNCTION is ignored. If it is nil,
1346 `mime-view-mode-default-map' is used."
1347 (mime-maybe-hide-echo-buffer)
1348 (let ((win-conf (current-window-configuration)))
1350 (setq preview-buffer
1351 (concat "*Preview-" (mime-entity-name message) "*")))
1352 (or original-major-mode
1353 (setq original-major-mode major-mode))
1354 (let ((inhibit-read-only t))
1355 (set-buffer (get-buffer-create preview-buffer))
1359 (setq mime-mother-buffer mother))
1360 (setq mime-preview-original-window-configuration win-conf)
1361 (setq major-mode 'mime-view-mode)
1362 (setq mode-name "MIME-View")
1363 (mime-display-entity message nil
1364 `((entity-button . invisible)
1366 (major-mode . ,original-major-mode))
1370 (if default-keymap-or-function
1371 (mime-view-define-keymap default-keymap-or-function)
1372 mime-view-mode-default-map)))
1374 (next-single-property-change (point-min) 'mime-view-entity)))
1377 (goto-char (point-min))
1378 (search-forward "\n\n" nil t)))
1379 (run-hooks 'mime-view-mode-hook)
1380 (set-buffer-modified-p nil)
1381 (setq buffer-read-only t)
1385 (defun mime-view-buffer (&optional raw-buffer preview-buffer mother
1386 default-keymap-or-function
1387 representation-type)
1388 "View RAW-BUFFER in MIME-View mode.
1389 Optional argument PREVIEW-BUFFER is either nil or a name of preview
1391 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
1392 function. If it is a keymap, keymap of MIME-View mode will be added
1393 to it. If it is a function, it will be bound as default binding of
1394 keymap of MIME-View mode.
1395 Optional argument REPRESENTATION-TYPE is representation-type of
1396 message. It must be nil, `binary' or `cooked'. If it is nil,
1397 `cooked' is used as default."
1400 (setq raw-buffer (current-buffer)))
1401 (or representation-type
1402 (setq representation-type
1404 (set-buffer raw-buffer)
1405 (cdr (or (assq major-mode mime-raw-representation-type-alist)
1406 (assq t mime-raw-representation-type-alist)))
1408 (if (eq representation-type 'binary)
1409 (setq representation-type 'buffer)
1411 (setq preview-buffer (mime-display-message
1412 (mime-open-entity representation-type raw-buffer)
1413 preview-buffer mother default-keymap-or-function))
1414 (or (get-buffer-window preview-buffer)
1415 (let ((r-win (get-buffer-window raw-buffer)))
1417 (set-window-buffer r-win preview-buffer)
1418 (let ((m-win (and mother (get-buffer-window mother))))
1420 (set-window-buffer m-win preview-buffer)
1421 (switch-to-buffer preview-buffer)
1424 (defun mime-view-mode (&optional mother ctl encoding
1425 raw-buffer preview-buffer
1426 default-keymap-or-function)
1427 "Major mode for viewing MIME message.
1429 Here is a list of the standard keys for mime-view-mode.
1434 u Move to upper content
1435 p or M-TAB Move to previous content
1436 n or TAB Move to next content
1437 SPC Scroll up or move to next content
1438 M-SPC or DEL Scroll down or move to previous content
1439 RET Move to next line
1440 M-RET Move to previous line
1441 v Decode current content as `play mode'
1442 e Decode current content as `extract mode'
1443 C-c C-p Decode current content as `print mode'
1444 a Followup to current content.
1446 button-2 Move to point under the mouse cursor
1447 and decode current content as `play mode'
1450 (unless mime-view-redisplay
1452 (if raw-buffer (set-buffer raw-buffer))
1455 (or (assq major-mode mime-raw-representation-type-alist)
1456 (assq t mime-raw-representation-type-alist)))))
1457 (if (eq type 'binary)
1460 (setq mime-message-structure (mime-open-entity type raw-buffer))
1461 (or (mime-entity-content-type mime-message-structure)
1462 (mime-entity-set-content-type mime-message-structure ctl))
1464 (or (mime-entity-encoding mime-message-structure)
1465 (mime-entity-set-encoding mime-message-structure encoding))
1467 (mime-display-message mime-message-structure preview-buffer
1468 mother default-keymap-or-function)
1475 (defun mime-preview-find-boundary-info (&optional with-children)
1476 "Return boundary information of current part.
1477 If WITH-CHILDREN, refer boundary surrounding current part and its branches."
1481 (while (null (setq entity
1482 (get-text-property (point) 'mime-view-entity)))
1484 (setq p-beg (previous-single-property-change (point) 'mime-view-entity))
1485 (setq entity-node-id (mime-entity-node-id entity))
1486 (setq len (length entity-node-id))
1489 (if (eq (next-single-property-change (point-min)
1495 ((eq (next-single-property-change p-beg 'mime-view-entity)
1497 (setq p-beg (point))
1499 (setq p-end (next-single-property-change p-beg 'mime-view-entity))
1501 (setq p-end (point-max))
1503 ((null entity-node-id)
1504 (setq p-end (point-max))
1511 (next-single-property-change
1512 (point) 'mime-view-entity))
1514 (let ((rc (mime-entity-node-id
1515 (get-text-property (point)
1516 'mime-view-entity))))
1517 (or (and (>= (setq i (- (length rc) len)) 0)
1518 (equal entity-node-id (nthcdr i rc)))
1520 (setq p-end (or (next-single-property-change
1521 (point) 'mime-view-entity)
1523 (setq p-end (point-max))))
1525 (vector p-beg p-end entity)))
1531 (autoload 'mime-preview-play-current-entity "mime-play"
1532 "Play current entity." t)
1534 (defun mime-preview-extract-current-entity (&optional ignore-examples)
1535 "Extract current entity into file (maybe).
1536 It decodes current entity to call internal or external method as
1537 \"extract\" mode. The method is selected from variable
1538 `mime-acting-condition'."
1540 (mime-preview-play-current-entity ignore-examples "extract")
1543 (defun mime-preview-print-current-entity (&optional ignore-examples)
1544 "Print current entity (maybe).
1545 It decodes current entity to call internal or external method as
1546 \"print\" mode. The method is selected from variable
1547 `mime-acting-condition'."
1549 (mime-preview-play-current-entity ignore-examples "print")
1556 (defun mime-preview-follow-current-entity ()
1557 "Write follow message to current entity.
1558 It calls following-method selected from variable
1559 `mime-preview-following-method-alist'."
1561 (let ((entity (mime-preview-find-boundary-info t))
1564 (setq p-beg (aref entity 0)
1565 p-end (aref entity 1)
1566 entity (aref entity 2))
1567 (if (get-text-property p-beg 'mime-view-entity-body)
1570 (next-single-property-change
1571 p-beg 'mime-view-entity-body nil
1572 (or (next-single-property-change p-beg 'mime-view-entity)
1574 (let* ((mode (mime-preview-original-major-mode 'recursive))
1575 (entity-node-id (mime-entity-node-id entity))
1577 (format "%s-%s" (buffer-name) (reverse entity-node-id)))
1579 (the-buf (current-buffer))
1582 (set-buffer (setq new-buf (get-buffer-create new-name)))
1585 (insert-buffer-substring the-buf pb-beg p-end)
1586 (goto-char (point-min))
1587 (let ((current-entity
1588 (if (and (eq (mime-entity-media-type entity) 'message)
1589 (eq (mime-entity-media-subtype entity) 'rfc822))
1590 (car (mime-entity-children entity))
1592 (while (and current-entity
1593 (if (and (eq (mime-entity-media-type
1594 current-entity) 'message)
1595 (eq (mime-entity-media-subtype
1596 current-entity) 'rfc822))
1598 (mime-insert-header current-entity fields)
1600 (setq fields (std11-collect-field-names)
1601 current-entity (mime-entity-parent current-entity))
1603 (let ((rest mime-view-following-required-fields-list)
1606 (setq field-name (car rest))
1607 (or (std11-field-body field-name)
1610 (set-buffer the-buf)
1611 (let ((entity (when mime-mother-buffer
1612 (set-buffer mime-mother-buffer)
1613 (get-text-property (point)
1614 'mime-view-entity))))
1616 (null (setq ret (mime-entity-fetch-field
1617 entity field-name))))
1618 (setq entity (mime-entity-parent entity)))))
1620 (insert (concat field-name ": " ret "\n"))
1622 (setq rest (cdr rest))
1625 (let ((f (cdr (assq mode mime-preview-following-method-alist))))
1630 "Sorry, following method for %s is not implemented yet."
1639 (defun mime-preview-move-to-upper ()
1640 "Move to upper entity.
1641 If there is no upper entity, call function `mime-preview-quit'."
1644 (while (null (setq cinfo
1645 (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))
1670 (defun mime-preview-move-to-previous ()
1671 "Move to previous entity.
1672 If there is no previous entity, it calls function registered in
1673 variable `mime-preview-over-to-previous-method-alist'."
1675 (while (and (not (bobp))
1676 (null (get-text-property (point) 'mime-view-entity)))
1679 (let ((point (previous-single-property-change (point) 'mime-view-entity)))
1681 (>= point (point-min)))
1682 (if (get-text-property (1- point) 'mime-view-entity)
1683 (progn (goto-char point)
1685 (or (eq mime-preview-move-scroll t)
1686 (and mime-preview-move-scroll
1689 (move-to-window-line 0)
1690 (forward-line next-screen-context-lines)
1693 (recenter (* -1 next-screen-context-lines))))
1694 (goto-char (1- point))
1695 (mime-preview-move-to-previous)
1697 (let ((f (assq (mime-preview-original-major-mode)
1698 mime-preview-over-to-previous-method-alist)))
1704 (defun mime-preview-move-to-next ()
1705 "Move to next entity.
1706 If there is no previous entity, it calls function registered in
1707 variable `mime-preview-over-to-next-method-alist'."
1709 (while (and (not (eobp))
1710 (null (get-text-property (point) 'mime-view-entity)))
1713 (let ((point (next-single-property-change (point) 'mime-view-entity)))
1715 (<= point (point-max)))
1718 (if (null (get-text-property point 'mime-view-entity))
1719 (mime-preview-move-to-next)
1721 (or (eq mime-preview-move-scroll t)
1722 (and mime-preview-move-scroll
1725 (move-to-window-line -1)
1727 (* -1 next-screen-context-lines))
1730 (recenter next-screen-context-lines))
1732 (let ((f (assq (mime-preview-original-major-mode)
1733 mime-preview-over-to-next-method-alist)))
1739 (defun mime-preview-scroll-up-entity (&optional h)
1740 "Scroll up current entity.
1741 If reached to (point-max), it calls function registered in variable
1742 `mime-preview-over-to-next-method-alist'."
1745 (let ((f (assq (mime-preview-original-major-mode)
1746 mime-preview-over-to-next-method-alist)))
1751 (or (next-single-property-change (point) 'mime-view-entity)
1753 (bottom (window-end (selected-window))))
1756 (progn (goto-char point)
1757 (recenter next-screen-context-lines))
1761 (goto-char (point-max)))))
1764 (defun mime-preview-scroll-down-entity (&optional h)
1765 "Scroll down current entity.
1766 If reached to (point-min), it calls function registered in variable
1767 `mime-preview-over-to-previous-method-alist'."
1770 (let ((f (assq (mime-preview-original-major-mode)
1771 mime-preview-over-to-previous-method-alist)))
1776 (or (previous-single-property-change (point) 'mime-view-entity)
1778 (top (window-start (selected-window))))
1781 (progn (goto-char point)
1782 (recenter (* -1 next-screen-context-lines)))
1785 (beginning-of-buffer
1786 (goto-char (point-min)))))
1789 (defun mime-preview-next-line-entity (&optional lines)
1790 "Scroll up one line (or prefix LINES lines).
1791 If LINES is negative, scroll down LINES lines."
1793 (mime-preview-scroll-up-entity (or lines 1))
1796 (defun mime-preview-previous-line-entity (&optional lines)
1797 "Scrroll down one line (or prefix LINES lines).
1798 If LINES is negative, scroll up LINES lines."
1800 (mime-preview-scroll-down-entity (or lines 1))
1807 (defun mime-preview-toggle-display (type &optional display)
1808 (let ((situation (mime-preview-find-boundary-info))
1809 (sym (intern (concat "*" (symbol-name type))))
1811 (setq p-beg (aref situation 0)
1812 p-end (aref situation 1)
1813 entity (aref situation 2)
1814 situation (get-text-property p-beg 'mime-view-situation))
1815 (cond ((eq display 'invisible)
1820 (eq (cdr (or (assq sym situation)
1821 (assq type situation)))
1823 (setq situation (put-alist sym (if display
1828 (let ((inhibit-read-only t))
1829 (delete-region p-beg p-end)
1830 (mime-display-entity entity situation)))
1831 (let ((ret (assoc situation mime-preview-situation-example-list)))
1833 (setcdr ret (1+ (cdr ret)))
1834 (add-to-list 'mime-preview-situation-example-list
1835 (cons situation 0))))))
1837 (defun mime-preview-toggle-header (&optional force-visible)
1839 (mime-preview-toggle-display 'header force-visible))
1841 (defun mime-preview-toggle-content (&optional force-visible)
1843 (mime-preview-toggle-display 'body force-visible))
1845 (defun mime-preview-show-header ()
1847 (mime-preview-toggle-display 'header 'visible))
1849 (defun mime-preview-show-content ()
1851 (mime-preview-toggle-display 'body 'visible))
1853 (defun mime-preview-hide-header ()
1855 (mime-preview-toggle-display 'header 'invisible))
1857 (defun mime-preview-hide-content ()
1859 (mime-preview-toggle-display 'body 'invisible))
1865 (defun mime-preview-quit ()
1866 "Quit from MIME-preview buffer.
1867 It calls function registered in variable
1868 `mime-preview-quitting-method-alist'."
1870 (let ((r (assq (mime-preview-original-major-mode)
1871 mime-preview-quitting-method-alist)))
1876 (defun mime-preview-kill-buffer ()
1878 (kill-buffer (current-buffer))
1885 (provide 'mime-view)
1888 (setq mime-situation-examples-file nil)
1889 ;; to avoid to read situation-examples-file at compile time.
1892 (mime-view-read-situation-examples-file)
1894 ;;; mime-view.el ends here