lisp/gnus/mm-partial.el

   1 ;;; mm-partial.el --- showing message/partial
   2
   3 ;; Copyright (C) 2000, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007, 2008 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 3, 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 (with-current-buffer gnus-summary-buffer
  38                    gnus-newsgroup-headers))
  39         phandles header)
  40     (while (setq header (pop headers))
  41       (unless (eq (aref header 0) art)
  42         (mm-with-unibyte-buffer
  43           (gnus-request-article-this-buffer (aref header 0)
  44                                             gnus-newsgroup-name)
  45           (when (search-forward id nil t)
  46             (let ((nhandles (mm-dissect-buffer
  47                              nil gnus-article-loose-mime)) nid)
  48               (if (consp (car nhandles))
  49                   (mm-destroy-parts nhandles)
  50                 (setq nid (cdr (assq 'id
  51                                      (cdr (mm-handle-type nhandles)))))
  52                 (if (not (equal id nid))
  53                     (mm-destroy-parts nhandles)
  54                   (push nhandles phandles))))))))
  55     phandles))
  56
  57 ;;;###autoload
  58 (defun mm-inline-partial (handle &optional no-display)
  59   "Show the partial part of HANDLE.
  60 This function replaces the buffer of HANDLE with a buffer contains
  61 the entire message.
  62 If NO-DISPLAY is nil, display it. Otherwise, do nothing after replacing."
  63   (let ((id (cdr (assq 'id (cdr (mm-handle-type handle)))))
  64         phandles
  65         (b (point)) (n 1) total
  66         phandle nn ntotal
  67         gnus-displaying-mime handles buffer)
  68     (unless (mm-handle-cache handle)
  69       (unless id
  70         (error "Can not find message/partial id"))
  71       (setq phandles
  72             (sort (cons handle
  73                         (mm-partial-find-parts
  74                          id
  75                          (save-excursion
  76                            (set-buffer gnus-summary-buffer)
  77                            (gnus-summary-article-number))))
  78                   #'(lambda (a b)
  79                       (let ((anumber (string-to-number
  80                                       (cdr (assq 'number
  81                                                  (cdr (mm-handle-type a))))))
  82                             (bnumber (string-to-number
  83                                       (cdr (assq 'number
  84                                                  (cdr (mm-handle-type b)))))))
  85                         (< anumber bnumber)))))
  86       (setq gnus-article-mime-handles
  87             (mm-merge-handles gnus-article-mime-handles phandles))
  88       (save-excursion
  89         (set-buffer (generate-new-buffer " *mm*"))
  90         (while (setq phandle (pop phandles))
  91           (setq nn (string-to-number
  92                     (cdr (assq 'number
  93                                (cdr (mm-handle-type phandle))))))
  94           (setq ntotal (string-to-number
  95                         (cdr (assq 'total
  96                                    (cdr (mm-handle-type phandle))))))
  97           (if ntotal
  98               (if total
  99                   (unless (eq total ntotal)
 100                   (error "The numbers of total are different"))
 101                 (setq total ntotal)))
 102           (unless (< nn n)
 103             (unless (eq nn n)
 104               (error "Missing part %d" n))
 105             (mm-insert-part phandle)
 106             (goto-char (point-max))
 107             (when (not (eq 0 (skip-chars-backward "\r\n")))
 108               ;; remove tail blank spaces except one
 109               (if (looking-at "\r?\n")
 110                   (goto-char (match-end 0)))
 111               (delete-region (point) (point-max)))
 112             (setq n (+ n 1))))
 113         (unless total
 114           (error "Don't known the total number of"))
 115         (if (<= n total)
 116             (error "Missing part %d" n))
 117         (kill-buffer (mm-handle-buffer handle))
 118         (goto-char (point-min))
 119         (let ((point (if (search-forward "\n\n" nil t)
 120                          (1- (point))
 121                        (point-max))))
 122           (goto-char (point-min))
 123           (unless (re-search-forward "^mime-version:" point t)
 124             (insert "MIME-Version: 1.0\n")))
 125         (setcar handle (current-buffer))
 126         (mm-handle-set-cache handle t)))
 127     (unless no-display
 128       (save-excursion
 129         (save-restriction
 130           (narrow-to-region b b)
 131           (mm-insert-part handle)
 132           (let (gnus-article-mime-handles)
 133             (run-hooks 'gnus-article-decode-hook)
 134             (gnus-article-prepare-display)
 135             (setq handles gnus-article-mime-handles))
 136           (when handles
 137             ;; It is in article buffer.
 138             (setq gnus-article-mime-handles
 139                   (mm-merge-handles gnus-article-mime-handles handles)))
 140           (mm-handle-set-undisplayer
 141            handle
 142            `(lambda ()
 143               (let (buffer-read-only)
 144                 (condition-case nil
 145                     ;; This is only valid on XEmacs.
 146                     (mapcar (lambda (prop)
 147                             (remove-specifier
 148                              (face-property 'default prop) (current-buffer)))
 149                             '(background background-pixmap foreground))
 150                   (error nil))
 151                 (delete-region ,(point-min-marker) ,(point-max-marker))))))))))
 152
 153 (provide 'mm-partial)
 154
 155 ;; arch-tag: 460e7424-05f2-4a1d-a0f2-70ec081eff7d
 156 ;;; mm-partial.el ends here