2011-09-18 13:39:36 +02:00
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;; mm-view.el -- part of mm, the mu mail user agent
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;;
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;; Copyright (C) 2011 Dirk-Jan C. Binnema
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;; Author: Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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;; Maintainer: Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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;; Keywords: email
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;; Version: 0.0
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;; This file is not part of GNU Emacs.
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;;
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; In this file are function related to creating the list of one-line
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;; descriptions of emails, aka 'headers' (not to be confused with headers like
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;; 'To:' or 'Subject:')
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;; mm
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;;; Code:
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(eval-when-compile (require 'cl))
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(require 'mm-common)
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(require 'html2text)
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(defconst mm/view-buffer-name "*mm-view*"
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"*internal* Name for the message view buffer")
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;; some buffer-local variables
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(defvar mm/hdrs-buffer nil
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"*internal* Headers buffer connected to this view.")
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(defvar mm/current-msg nil
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"*internal* The plist describing the current message.")
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(defun mm/view (msg hdrsbuf)
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"Display the message MSG in a new buffer, and keep in sync with HDRSBUF.
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'In sync' here means that moving to the next/previous message in
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the the message view affects HDRSBUF, as does marking etc.
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As a side-effect, a message that is being viewed loses its 'unread'
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marking if it still had that."
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(let ((buf (get-buffer-create mm/view-buffer-name)) (inhibit-read-only t))
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(with-current-buffer buf
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(erase-buffer)
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(insert
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(mapconcat
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(lambda (field)
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(case field
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(:subject (mm/view-header "Subject" (plist-get msg :subject)))
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(:path (mm/view-header "Path" (plist-get msg :path)))
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(:to (mm/view-contacts msg field))
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(:from (mm/view-contacts msg field))
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(:cc (mm/view-contacts msg field))
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(:bcc (mm/view-contacts msg field))
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(:date
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(let* ((date (plist-get msg :date))
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(datestr (when date (format-time-string "%c" date))))
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(if datestr (mm/view-header "Date" datestr) "")))
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(:flags "") ;; TODO
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(:maildir (mm/view-header "Maildir" (plist-get msg :maildir)))
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(:size (mm/view-size msg)
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(let* ((size (plist-get msg :size))
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(sizestr (when size (format "%d bytes"))))
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(if sizestr (mm/view-header "Size" sizestr))))
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2011-09-19 23:20:59 +02:00
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(:attachments (mm/view-attachments msg))
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2011-09-18 13:39:36 +02:00
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(t (error "Unsupported field: %S" field))))
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mm/view-headers "")
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"\n"
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(mm/view-body msg))
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(mm/view-mode)
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(setq
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mode-name (format "%s" mm/view-buffer-name (plist-get msg :docid))
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;; these are buffer-local
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mm/current-msg msg
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mm/hdrs-buffer hdrsbuf)
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(switch-to-buffer buf)
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(goto-char (point-min)))))
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(defun mm/view-body (msg)
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"Get the body for this message, which is either :body-txt,
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or if not available, :body-html converted to text)."
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(or (plist-get msg :body-txt)
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(with-temp-buffer
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(plist-get msg :body-html)
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(html2text)
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(buffer-string))
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"No body found"))
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(defun mm/view-header (key val)
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"Show header FIELD for MSG with KEY. ie. <KEY>: value-of-FIELD\n."
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(if val
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(concat
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(propertize key 'face 'mm/view-header-key-face) ": "
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(propertize val 'face 'mm/view-header-value-face) "\n")
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""))
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(defun mm/view-contacts (msg field)
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(unless (member field '(:to :from :bcc :cc)) (error "Wrong type"))
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(let* ((lst (plist-get msg field))
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(contacts
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(when lst
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(mapconcat
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(lambda(c)
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(let ((name (car c)) (email (cdr c)))
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(if name
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(format "%s <%s>" name email)
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(format "%s" email)))) lst ", "))))
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(if contacts
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(mm/view-header
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(case field (:to "To") (:from "From") (:bcc "Bcc") (:cc "Cc"))
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contacts)
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"")))
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2011-09-19 23:20:59 +02:00
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(defvar mm/attach-map nil
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"*internal* Hash which maps a number to a (part-id name mime-type).")
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(defun mm/view-attachments (msg)
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"Display attachment information; the field looks like something like:
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:attachments ((4 \"statement Bray Eile.doc\" \"application/msword\"))."
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(let ((atts (plist-get msg :attachments)))
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(when atts
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(setq mm/attach-map
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(make-hash-table :size 32 :rehash-size 2 :weakness nil))
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(let* ((id 0)
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(vals
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(mapconcat
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(lambda (att)
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(incf id)
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(puthash id att mm/attach-map)
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(format "[%d]%s" id (nth 1 att)))
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atts ", ")))
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(mm/view-header (format "Attachments(%d):" id) vals)))))
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2011-09-18 13:39:36 +02:00
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(defvar mm/view-mode-map
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(let ((map (make-sparse-keymap)))
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(define-key map "q" 'mm/view-quit-buffer)
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(define-key map "s" 'mm/search)
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(define-key map "j" 'mm/jump-to-maildir)
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;; (define-key map "f" 'mua/view-forward)
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;; (define-key map "r" 'mua/view-reply)
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;; (define-key map "c" 'mua/view-compose)
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;; navigation between messages
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(define-key map "n" 'mm/view-next)
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(define-key map "p" 'mm/view-prev)
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2011-09-19 23:20:59 +02:00
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;; attachments
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(define-key map "e" 'mm/view-extract-attachment)
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(define-key map "o" 'mm/view-open-attachment)
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2011-09-18 13:39:36 +02:00
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;; marking/unmarking
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(define-key map "d" 'mm/view-mark-for-trash)
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(define-key map "D" 'mm/view-mark-for-delete)
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(define-key map "m" 'mm/view-mark-for-move)
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2011-09-19 23:20:59 +02:00
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;; next 3 only warn user
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2011-09-18 13:39:36 +02:00
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(define-key map "u" 'mm/view-unmark)
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(define-key map "U" 'mm/view-unmark)
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(define-key map "x" 'mm/view-marked-execute)
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map)
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"Keymap for \"*mm-view*\" buffers.")
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(fset 'mm/view-mode-map mm/view-mode-map)
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(defun mm/view-mode ()
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"Major mode for viewing an e-mail message."
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(interactive)
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(kill-all-local-variables)
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(use-local-map mm/view-mode-map)
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(make-local-variable 'mm/hdrs-buffer)
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(make-local-variable 'mm/current-msg)
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(setq major-mode 'mm/view-mode mode-name mm/view-buffer-name)
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(setq truncate-lines t buffer-read-only t))
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;;;;;;
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;; we mark messages are as read when we leave the message; ie., when skipping to
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;; the next/previous one, or leaving the view buffer altogether.
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(defun mm/view-mark-as-read-maybe ()
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"Clear the current message's New/Unread status and set it to
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Seen; if the message is not New/Unread, do nothing."
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(when mm/current-msg
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(let ((flags (plist-get mm/current-msg :flags))
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(docid (plist-get mm/current-msg :docid)))
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;; is it a new message?
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(when (or (member 'unread flags) (member 'new flags))
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;; if so, mark it as non-new and read
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(mm/proc-flag-msg docid "+S-u-N")))))
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;; Interactive functions
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(defun mm/view-quit-buffer ()
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"Quit the message view and return to the headers."
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(interactive)
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(mm/view-mark-as-read-maybe)
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(let ((inhibit-read-only t))
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(kill-buffer)
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(switch-to-buffer mm/hdrs-buffer)))
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(defun mm/view-next ()
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"View the next message."
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(interactive)
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(mm/view-mark-as-read-maybe)
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(with-current-buffer mm/hdrs-buffer
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(when (mm/next-header)
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(mm/hdrs-view))))
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(defun mm/view-prev ()
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"View the previous message."
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(interactive)
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(mm/view-mark-as-read-maybe)
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(with-current-buffer mm/hdrs-buffer
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(when (mm/prev-header)
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(mm/hdrs-view))))
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2011-09-19 23:20:59 +02:00
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(defun mm/view-extract-attachment (attnum)
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"Extract the attachment with ATTNUM"
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(unless mm/attachment-dir (error "`mm/attachment-dir' is not set"))
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(when (zerop (hash-table-count mm/attach-map))
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(error "No attachments for this message"))
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(interactive "nAttachment to extract:")
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(let* ((att (gethash attnum mm/attach-map))
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(path (when att (concat mm/attachment-dir "/" (nth 1 att))))
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(retry t))
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(unless att (error "Not a valid attachment number"))
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(while retry
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(setq path (expand-file-name (read-string "Save as " path)))
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(setq retry
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(and (file-exists-p path)
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(not (y-or-n-p (concat "Overwrite " path "?"))))))
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(mm/proc-save (plist-get mm/current-msg :docid) (car att) path)))
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(defun mm/view-open-attachment (attnum)
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"Extract the attachment with ATTNUM"
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(when (zerop (hash-table-count mm/attach-map))
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(error "No attachments for this message"))
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(interactive "nAttachment to open:")
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(let* ((att (gethash attnum mm/attach-map)))
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(unless att (error "Not a valid attachment number"))
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(mm/proc-open (plist-get mm/current-msg :docid) (car att))))
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2011-09-18 13:39:36 +02:00
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(defun mm/view-mark-for-trash ()
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"Mark the viewed message to be moved to the trash folder."
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(interactive)
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(with-current-buffer mm/hdrs-buffer
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(when (mm/mark-for-trash)
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(mm/hdrs-view))))
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(defun mm/view-mark-for-delete ()
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"Mark the viewed message to be deleted."
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(interactive)
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(with-current-buffer mm/hdrs-buffer
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(when (mm/mark-for-trash)
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(mm/hdrs-view))))
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(defun mm/view-mark-for-move ()
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"Mark the viewed message to be moved to some folder."
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(interactive)
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(with-current-buffer mm/hdrs-buffer
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(when (mm/mark-for-move)
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(mm/view-next))))
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(defun mm/view-unmark ()
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"Warn user that unmarking only works in the header list."
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(interactive)
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(message "Unmarking needs to be done in the header list view"))
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(defun mm/view-marked-execute ()
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"Warn user that execution can only take place in n the header
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list."
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(interactive)
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(message "Execution needs to be done in the header list view"))
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(provide 'mm-view)
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