1;;; mm-partial.el --- showing message/partial
2
3;; Copyright (C) 2000, 2001, 2002, 2003, 2004,
4;;   2005, 2006, 2007 Free Software Foundation, Inc.
5
6;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
7;; Keywords: message partial
8
9;; This file is part of GNU Emacs.
10
11;; GNU Emacs is free software; you can redistribute it and/or modify
12;; it under the terms of the GNU General Public License as published
13;; by the Free Software Foundation; either version 2, or (at your
14;; option) any later version.
15
16;; GNU Emacs is distributed in the hope that it will be useful, but
17;; WITHOUT ANY WARRANTY; without even the implied warranty of
18;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
19;; General Public License for more details.
20
21;; You should have received a copy of the GNU General Public License
22;; along with GNU Emacs; see the file COPYING.  If not, write to the
23;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24;; Boston, MA 02110-1301, USA.
25
26;;; Commentary:
27
28;;; Code:
29
30(eval-when-compile (require 'cl))
31
32(require 'gnus-sum)
33(require 'mm-util)
34(require 'mm-decode)
35
36(defun mm-partial-find-parts (id &optional art)
37  (let ((headers (save-excursion
38		   (set-buffer gnus-summary-buffer)
39		   gnus-newsgroup-headers))
40	phandles header)
41    (while (setq header (pop headers))
42      (unless (eq (aref header 0) art)
43	(mm-with-unibyte-buffer
44	  (gnus-request-article-this-buffer (aref header 0)
45					    gnus-newsgroup-name)
46	  (when (search-forward id nil t)
47	    (let ((nhandles (mm-dissect-buffer
48			     nil gnus-article-loose-mime)) nid)
49	      (if (consp (car nhandles))
50		  (mm-destroy-parts nhandles)
51		(setq nid (cdr (assq 'id
52				     (cdr (mm-handle-type nhandles)))))
53		(if (not (equal id nid))
54		    (mm-destroy-parts nhandles)
55		  (push nhandles phandles))))))))
56    phandles))
57
58;;;###autoload
59(defun mm-inline-partial (handle &optional no-display)
60  "Show the partial part of HANDLE.
61This function replaces the buffer of HANDLE with a buffer contains
62the entire message.
63If NO-DISPLAY is nil, display it. Otherwise, do nothing after replacing."
64  (let ((id (cdr (assq 'id (cdr (mm-handle-type handle)))))
65	phandles
66	(b (point)) (n 1) total
67	phandle nn ntotal
68	gnus-displaying-mime handles buffer)
69    (unless (mm-handle-cache handle)
70      (unless id
71	(error "Can not find message/partial id"))
72      (setq phandles
73	    (sort (cons handle
74			(mm-partial-find-parts
75			 id
76			 (save-excursion
77			   (set-buffer gnus-summary-buffer)
78			   (gnus-summary-article-number))))
79		  #'(lambda (a b)
80		      (let ((anumber (string-to-number
81				      (cdr (assq 'number
82						 (cdr (mm-handle-type a))))))
83			    (bnumber (string-to-number
84				      (cdr (assq 'number
85						 (cdr (mm-handle-type b)))))))
86			(< anumber bnumber)))))
87      (setq gnus-article-mime-handles
88	    (mm-merge-handles gnus-article-mime-handles phandles))
89      (save-excursion
90	(set-buffer (generate-new-buffer " *mm*"))
91	(while (setq phandle (pop phandles))
92	  (setq nn (string-to-number
93		    (cdr (assq 'number
94			       (cdr (mm-handle-type phandle))))))
95	  (setq ntotal (string-to-number
96			(cdr (assq 'total
97				   (cdr (mm-handle-type phandle))))))
98	  (if ntotal
99	      (if total
100		  (unless (eq total ntotal)
101		  (error "The numbers of total are different"))
102		(setq total ntotal)))
103	  (unless (< nn n)
104	    (unless (eq nn n)
105	      (error "Missing part %d" n))
106	    (mm-insert-part phandle)
107	    (goto-char (point-max))
108	    (when (not (eq 0 (skip-chars-backward "\r\n")))
109	      ;; remove tail blank spaces except one
110	      (if (looking-at "\r?\n")
111		  (goto-char (match-end 0)))
112	      (delete-region (point) (point-max)))
113	    (setq n (+ n 1))))
114	(unless total
115	  (error "Don't known the total number of"))
116	(if (<= n total)
117	    (error "Missing part %d" n))
118	(kill-buffer (mm-handle-buffer handle))
119	(goto-char (point-min))
120	(let ((point (if (search-forward "\n\n" nil t)
121			 (1- (point))
122		       (point-max))))
123	  (goto-char (point-min))
124	  (unless (re-search-forward "^mime-version:" point t)
125	    (insert "MIME-Version: 1.0\n")))
126	(setcar handle (current-buffer))
127	(mm-handle-set-cache handle t)))
128    (unless no-display
129      (save-excursion
130	(save-restriction
131	  (narrow-to-region b b)
132	  (mm-insert-part handle)
133	  (let (gnus-article-mime-handles)
134	    (run-hooks 'gnus-article-decode-hook)
135	    (gnus-article-prepare-display)
136	    (setq handles gnus-article-mime-handles))
137	  (when handles
138	    ;; It is in article buffer.
139	    (setq gnus-article-mime-handles
140		  (mm-merge-handles gnus-article-mime-handles handles)))
141	  (mm-handle-set-undisplayer
142	   handle
143	   `(lambda ()
144	      (let (buffer-read-only)
145		(condition-case nil
146		    ;; This is only valid on XEmacs.
147		    (mapcar (lambda (prop)
148			    (remove-specifier
149			     (face-property 'default prop) (current-buffer)))
150			    '(background background-pixmap foreground))
151		  (error nil))
152		(delete-region ,(point-min-marker) ,(point-max-marker))))))))))
153
154(provide 'mm-partial)
155
156;;; arch-tag: 460e7424-05f2-4a1d-a0f2-70ec081eff7d
157;;; mm-partial.el ends here
158