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613 lines
19 KiB
EmacsLisp
613 lines
19 KiB
EmacsLisp
;; mm-hdrs.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 'mm-proc)
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;;;; internal variables/constants ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defvar mm/last-expr nil
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"*internal* The most recent search expression.")
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(defvar mm/sortfield nil
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"*internal* Field to sort headers by")
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(defvar mm/sort-descending nil
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"*internal Whether to sort in descending order")
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(defconst mm/hdrs-buffer-name "*mm-headers*"
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"*internal* Name of the buffer for message headers.")
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(defvar mm/hdrs-buffer nil
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"*internal* Buffer for message headers")
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(defun mm/hdrs-search (expr)
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"Search in the mu database for EXPR, and switch to the output
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buffer for the results."
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(interactive "s[mu] search for: ")
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(let ((buf (get-buffer-create mm/hdrs-buffer-name))
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(inhibit-read-only t))
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(with-current-buffer buf
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(erase-buffer)
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(mm/hdrs-mode)
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(setq
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mm/mm/marks-map nil
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mm/msg-map (make-hash-table :size 1024 :rehash-size 2 :weakness nil)
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mode-name expr
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mm/last-expr expr
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mm/hdrs-buffer buf)))
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(switch-to-buffer mm/hdrs-buffer)
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(mm/proc-find expr))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; handler functions
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;;
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;; next are a bunch of handler functions; those will be called from mm-proc in
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;; response to output from the server process
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(defun mm/hdrs-view-handler (msg)
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"Handler function for displaying a message."
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(mm/view msg mm/hdrs-buffer))
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(defun mm/hdrs-error-handler (err)
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"Handler function for showing an error."
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(let ((errcode (plist-get err :error))
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(errmsg (plist-get err :error-message)))
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(case errcode
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(4 (message "No matches for this search query."))
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(t (message (format "Error %d: %s" errcode errmsg))))))
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(defun mm/hdrs-update-handler (msg is-move)
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"Update handler, will be called when a message has been updated
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in the database. This function will update the current list of
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headers."
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(when (buffer-live-p mm/hdrs-buffer)
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(with-current-buffer mm/hdrs-buffer
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(let* ((docid (plist-get msg :docid))
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(marker (gethash docid mm/msg-map))
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(point (when marker (marker-position marker))))
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(when point ;; is the message present in this list?
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;; if it's marked, unmark it now
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(when (mm/hdrs-docid-is-marked docid) (mm/hdrs-mark 'unmark))
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;; first, remove the old one (otherwise, we'd have to headers with
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;; the same docid...
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(mm/hdrs-remove-handler docid)
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;; now, if this update was about *moving* a message, we don't show it
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;; anymore (of course, we cannot be sure if the message really no
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;; longer matches the query, but this seem a good heuristic.
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;; if it was only a flag-change, show the message with its updated flags.
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(unless is-move
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(mm/hdrs-header-handler msg point)))))))
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(defun mm/hdrs-remove-handler (docid)
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"Remove handler, will be called when a message has been removed
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from the database. This function will hide the remove message in
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the current list of headers."
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(with-current-buffer mm/hdrs-buffer
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(let* ((marker (gethash docid mm/msg-map))
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(pos (and marker (marker-position marker)))
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(docid-at-pos (and pos (mm/hdrs-get-docid pos))))
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(unless marker (error "Message %d not found" docid))
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(unless (eq docid docid-at-pos)
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(error "At point %d, expected docid %d, but got %d" pos docid docid-at-pos))
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(mm/hdrs-remove-header docid pos))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun mm/hdrs-header-handler (msg &optional point)
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"Create a one line description of MSG in this buffer, at POINT,
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if provided, or at the end of the buffer otherwise."
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(let* ((line (mapconcat
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(lambda (f-w)
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(let* ((field (car f-w)) (width (cdr f-w))
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(val (plist-get msg field))
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(str
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(case field
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(:subject val)
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((:to :from :cc :bcc)
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(mapconcat
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(lambda (ct)
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(let ((name (car ct)) (email (cdr ct)))
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(or name email "?"))) val ", "))
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(:date (format-time-string "%x %X" val))
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(:flags (mm/flags-to-string val))
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(:size
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(cond
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((>= val 1000000) (format "%2.1fM" (/ val 1000000.0)))
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((and (>= val 1000) (< val 1000000))
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(format "%2.1fK" (/ val 1000.0)))
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((< val 1000) (format "%d" val))))
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(t (error "Unsupported header field (%S)" field)))))
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(when str
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(if (not width)
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str
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(truncate-string-to-width str width 0 ?\s t)))))
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mm/header-fields " "))
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(flags (plist-get msg :flags))
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(line (cond
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((member 'trashed flags) (propertize line 'face 'mm/trashed-face))
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((member 'unread flags) (propertize line 'face 'mm/unread-face))
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(t (propertize line 'face 'mm/header-face)))))
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(mm/hdrs-add-header line (plist-get msg :docid)
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(if point point (point-max)))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; hdrs-mode and mode-map ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defvar mm/hdrs-mode-map
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(let ((map (make-sparse-keymap)))
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(define-key map "s" 'mm/search)
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(define-key map "q" 'mm/quit-buffer)
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(define-key map "o" 'mm/change-sort)
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(define-key map "g" 'mm/rerun-search)
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;; navigation
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(define-key map "n" 'mm/next-header)
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(define-key map "p" 'mm/prev-header)
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(define-key map "j" 'mm/jump-to-maildir)
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;; marking/unmarking/executing
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(define-key map "m" 'mm/mark-for-move)
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(define-key map "d" 'mm/mark-for-trash)
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(define-key map (kbd "<backspace>") 'mm/mark-for-trash)
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(define-key map "D" 'mm/mark-for-delete)
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(define-key map (kbd "<delete>") 'mm/mark-for-delete)
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(define-key map "u" 'mm/unmark)
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(define-key map "U" 'mm/unmark-all)
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(define-key map "x" 'mm/execute-marks)
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(define-key map " " 'mm/select)
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(define-key map "*" 'mm/select)
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;; message composition
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(define-key map "r" 'mm/compose-reply)
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(define-key map "f" 'mm/compose-forward)
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(define-key map "c" 'mm/compose-new)
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(define-key map "e" 'mm/edit-draft)
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(define-key map (kbd "RET") 'mm/view-message)
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map)
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"Keymap for *mm-headers* buffers.")
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(fset 'mm/hdrs-mode-map mm/hdrs-mode-map)
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(defun mm/hdrs-mode ()
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"Major mode for displaying mua search results."
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(interactive)
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(kill-all-local-variables)
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(use-local-map mm/hdrs-mode-map)
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(make-local-variable 'mm/last-expr)
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(make-local-variable 'mm/hdrs-proc)
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(make-local-variable 'mm/marks-map)
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(make-local-variable 'mm/msg-map)
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;; we register our handler functions for the mm-proc (mu server) output
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(setq mm/proc-error-func 'mm/hdrs-error-handler)
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(setq mm/proc-update-func 'mm/hdrs-update-handler)
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(setq mm/proc-header-func 'mm/hdrs-header-handler)
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(setq mm/proc-view-func 'mm/hdrs-view-handler)
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(setq mm/proc-remove-func 'mm/hdrs-remove-handler)
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;; this last one is defined in mm-send.el
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(setq mm/proc-compose-func 'mm/send-compose-handler)
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(setq
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mm/marks-map (make-hash-table :size 16 :rehash-size 2)
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major-mode 'mm/hdrs-mode
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mode-name "*mm-headers*"
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truncate-lines t
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buffer-read-only t
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overwrite-mode 'overwrite-mode-binary))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; headers ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defvar mm/msg-map nil
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"*internal* A map (hashtable) which maps a database (Xapian)
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docid (which uniquely identifies a message to a marker. where
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marker points to the buffer position for the message.
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Using this map, we can update message headers which are currently
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on the screen, when we receive (:update ) notices from the mu
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server.")
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(defun mm/hdrs-add-header (str docid point)
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"Add header STR with DOCID to the buffer. If POINT is not
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provided, put it at the end of the buffer."
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(unless docid (error "Invalid message"))
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(when (buffer-live-p mm/hdrs-buffer)
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(with-current-buffer mm/hdrs-buffer
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(let ((inhibit-read-only t))
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(save-excursion
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(goto-char point)
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;; Update `mm/msg-map' with MSG, and MARKER pointing to the buffer
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;; position for the message header."
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(insert (propertize (concat " " str "\n") 'docid docid))
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(puthash docid (copy-marker point t) mm/msg-map))))))
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(defun mm/hdrs-remove-header (docid point)
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"Remove header with DOCID at POINT."
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(with-current-buffer mm/hdrs-buffer
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(goto-char point)
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;; sanity check
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(unless (eq docid (mm/hdrs-get-docid))
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(error "%d: Expected %d, but got %d"
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(line-number-at-pos) docid (mm/hdrs-get-docid)))
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(let ((inhibit-read-only t))
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;; (put-text-property (line-beginning-position line-beginning-positio 2)
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;; 'invisible t))
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(delete-region (line-beginning-position) (line-beginning-position 2)))
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(remhash docid mm/msg-map)))
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(defun mm/hdrs-mark-header (docid mark)
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"(Visually) mark the header for DOCID with character MARK."
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(let ((marker (gethash docid mm/msg-map)))
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;; (unless marker (error "Unregistered message"))
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(when marker
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(with-current-buffer mm/hdrs-buffer
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(save-excursion
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(let ((inhibit-read-only t) (pos (marker-position marker)))
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(goto-char pos)
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(delete-char 2)
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(insert (propertize mark 'face 'mm/hdrs-marks-face) " ")
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(put-text-property pos
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(line-beginning-position 2) 'docid docid)
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;; update the msg-map, ie., move it back to the start of the line
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(puthash docid
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(copy-marker (line-beginning-position) t)
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mm/msg-map)))))))
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(defun mm/hdrs-get-docid (&optional point)
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"Get the docid for the message at POINT, if provided, or (point), otherwise."
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(with-current-buffer mm/hdrs-buffer
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(get-text-property (if point point (point)) 'docid)))
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(defun mm/dump-msg-map ()
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"*internal* dump the message map (for debugging)."
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(with-current-buffer mm/hdrs-buffer
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(message "msg-map (%d)" (hash-table-count mm/msg-map))
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(maphash
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(lambda (k v)
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(message "%s => %s" k v))
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mm/msg-map)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; marks ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defvar mm/marks-map nil
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"Map (hash) of docid->markinfo; when a message is marked, the
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information is added here.
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markinfo is a list consisting of the following:
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\(marker mark target)
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where
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MARKER is an emacs-textmarker pointing to the beginning of the header line
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MARK is the type of mark (move, trash, delete)
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TARGET (optional) is the target directory (for 'move')")
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(defun mm/hdrs-mark-message (mark &optional target)
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"Mark (or unmark) message at point. MARK specifies the
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mark-type. For `move'-marks there is also the TARGET argument,
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which specifies to which maildir the message is to be moved.
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The following marks are available, and the corresponding props:
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MARK TARGET description
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----------------------------------------------------------
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`move' y move the message to some folder
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`trash' n move the message to `mm/trash-folder'
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`delete' n remove the message
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`unmark' n unmark this message"
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(let* ((docid (mm/hdrs-get-docid))
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(markkar
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(case mark ;; the visual mark
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('move "m")
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('trash "d")
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('delete "D")
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('select "*")
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('unmark " ")
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(t (error "Invalid mark %S" mark)))))
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(unless docid (error "No message on this line"))
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(save-excursion
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(when (mm/hdrs-mark-header docid markkar))
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;; update the hash -- remove everything current, and if add the new stuff,
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;; unless we're unmarking
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(remhash docid mm/marks-map)
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(unless (eql mark 'unmark)
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(puthash docid (list (point-marker) mark target) mm/marks-map)))))
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(defun mm/hdrs-mark (mark &optional target)
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"Mark the header at point, or, if
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region is active, mark all headers in the region. Als see
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`mm/hdrs-mark-message'."
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(with-current-buffer mm/hdrs-buffer
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(if (use-region-p)
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;; mark all messages in the region.
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(save-excursion
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(let ((b (region-beginning)) (e (region-end)))
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(goto-char b)
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(while (<= (line-beginning-position) e)
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(mm/hdrs-mark-message mark target)
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(forward-line 1))))
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;; just a single message
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(mm/hdrs-mark-message mark target))))
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(defun mm/hdrs-marks-execute ()
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"Execute the actions for all marked messages in this
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buffer. After the actions have been executed succesfully, the
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affected messages are *hidden* from the current header list. Since
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the headers are the result of a search, we cannot be certain that
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the messages no longer matches the current one - to get that
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certainty, we need to rerun the search, but we don't want to do
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that automatically, as it may be too slow and/or break the users
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flow. Therefore, we hide the message, which in practice seems to
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work well."
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(if (= 0 (hash-table-count mm/marks-map))
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(message "Nothing is marked")
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(maphash
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(lambda (docid val)
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(let ((marker (nth 0 val)) (mark (nth 1 val)) (target (nth 2 val)))
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(case mark
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(move
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(mm/proc-move-msg docid target))
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(trash
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(unless mm/trash-folder
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(error "`mm/trash-folder' not set"))
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(mm/proc-move-msg docid mm/trash-folder "+T"))
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(delete
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(mm/proc-remove-msg docid)))))
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mm/marks-map)
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(mm/hdrs-unmark-all)))
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(defun mm/hdrs-unmark-all ()
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"Unmark all marked messages."
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(unless (/= 0 (hash-table-count mm/marks-map))
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(error "Nothing is marked"))
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(maphash
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(lambda (docid val)
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(save-excursion
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(goto-char (marker-position (nth 0 val)))
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(mm/hdrs-mark 'unmark)))
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mm/marks-map))
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(defun mm/hdrs-view ()
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"View message at point."
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(let ((docid (mm/hdrs-get-docid)))
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(unless docid (error "No message at point."))
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(mm/proc-view-msg docid)))
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(defun mm/hdrs-compose (compose-type)
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"Compose either a reply/forward based on the message at point. or
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start editing it. COMPOSE-TYPE is either `reply', `forward' or
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`edit'."
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(if (eq compose-type 'new)
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(mm/send-compose-handler 'new)
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(let ((docid (mm/hdrs-get-docid)))
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(when (and (not docid) (not ))
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(error "No message at point."))
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(cond
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((member compose-type '(reply forward))
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(mm/proc-compose compose-type docid))
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((eq compose-type 'edit)
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(mm/proc-compose 'edit docid))
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(t (error "invalid compose type %S" compose-type))))))
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(defun mm/hdrs-docid-is-marked (docid)
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"Is the given docid marked?"
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(when (gethash docid mm/marks-map) t))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; interactive functions ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun mm/ignore-marks ()
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(let*
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((num
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(hash-table-count mm/marks-map))
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(unmark (or (= 0 num)
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(y-or-n-p
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(format "Sure you want to unmark %d message(s)?" num)))))
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(message nil)
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unmark))
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(defun mm/search ()
|
||
"Start a new mu search."
|
||
(interactive)
|
||
(when (mm/ignore-marks)
|
||
(call-interactively 'mm/hdrs-search)))
|
||
|
||
(defun mm/quit-buffer ()
|
||
"Quit the current buffer."
|
||
(interactive)
|
||
(when (mm/ignore-marks)
|
||
(mm/kill-proc) ;; hmmm...
|
||
(kill-buffer)
|
||
(mm)))
|
||
|
||
;;;; TODO implement
|
||
;; (defun mm/change-sort ()
|
||
;; "Change the sorting field and/or direction."
|
||
;; (interactive)
|
||
;; )
|
||
|
||
(defun mm/rerun-search ()
|
||
"Rerun the search for the last search expression; if none exists,
|
||
do a new search."
|
||
(interactive)
|
||
(when (mm/ignore-marks)
|
||
(if mm/last-expr
|
||
(mm/hdrs-search mm/last-expr)
|
||
(mm/search))))
|
||
|
||
(defun mm/view-message ()
|
||
"View the message at point."
|
||
(interactive)
|
||
(mm/hdrs-view))
|
||
|
||
(defun mm/next-header ()
|
||
"Move point to the next message header. If this succeeds, return
|
||
the new docid. Otherwise, return nil."
|
||
(interactive)
|
||
(with-current-buffer mm/hdrs-buffer
|
||
(when (= 0 (forward-line 1))
|
||
(let ((docid (mm/hdrs-get-docid)))
|
||
(if docid docid (mm/next-header))))))
|
||
|
||
(defun mm/prev-header ()
|
||
"Move point to the previous message header. If this succeeds,
|
||
return the new docid. Otherwise, return nil."
|
||
(interactive)
|
||
(with-current-buffer mm/hdrs-buffer
|
||
(when (= 0 (forward-line -1))
|
||
(let ((docid (mm/hdrs-get-docid)))
|
||
(if docid docid (mm/prev-header)))))) ;; skip non-headers
|
||
|
||
|
||
(defun mm/jump-to-maildir ()
|
||
"Show the messages in one of the standard folders."
|
||
(interactive)
|
||
(let ((fld (mm/ask-maildir "Jump to maildir: ")))
|
||
(mm/hdrs-search (concat "maildir:" fld))))
|
||
|
||
|
||
|
||
(defun mm/mark-for-move ()
|
||
"Mark message at point for moving to a maildir."
|
||
(interactive)
|
||
(with-current-buffer mm/hdrs-buffer
|
||
(let* ((target (mm/ask-maildir "Target maildir for move: "))
|
||
(fulltarget (concat mm/maildir target)))
|
||
(when (or (file-directory-p fulltarget)
|
||
(and (yes-or-no-p
|
||
(format "%s does not exist. Create now?" fulltarget))
|
||
(mm/proc-mkdir fulltarget)))
|
||
(mm/hdrs-mark 'move target)
|
||
(mm/next-header)))))
|
||
|
||
(defun mm/mark-for-trash ()
|
||
"Mark message at point for moving to the trash
|
||
folder (`mm/trash-folder')."
|
||
(interactive)
|
||
(unless mm/trash-folder
|
||
(error "`mm/trash-folder' is not set"))
|
||
(with-current-buffer mm/hdrs-buffer
|
||
(mm/hdrs-mark 'trash)
|
||
(mm/next-header)))
|
||
|
||
(defun mm/mark-for-delete ()
|
||
"Mark message at point for direct deletion."
|
||
(interactive)
|
||
(with-current-buffer mm/hdrs-buffer
|
||
(mm/hdrs-mark 'delete)
|
||
(mm/next-header)))
|
||
|
||
(defun mm/unmark ()
|
||
"Unmark message at point."
|
||
(interactive)
|
||
(with-current-buffer mm/hdrs-buffer
|
||
(mm/hdrs-mark 'unmark)
|
||
(mm/next-header)))
|
||
|
||
(defun mm/unmark-all ()
|
||
"Unmark all messages."
|
||
(interactive)
|
||
(with-current-buffer mm/hdrs-buffer
|
||
(if (= 0 (hash-table-count mm/marks-map))
|
||
(message "Nothing is marked")
|
||
(when (mm/ignore-marks)
|
||
(mm/hdrs-unmark-all)))))
|
||
|
||
(defun mm/execute-marks ()
|
||
"Execute the actions for the marked messages."
|
||
(interactive)
|
||
(with-current-buffer mm/hdrs-buffer
|
||
(if (= 0 (hash-table-count mm/marks-map))
|
||
(message "Nothing is marked")
|
||
(when (y-or-n-p (format "Sure you want to execute marks on %d message(s)?"
|
||
(hash-table-count mm/marks-map)))
|
||
(mm/hdrs-marks-execute)
|
||
(message nil)))))
|
||
|
||
(defun mm/compose-reply ()
|
||
"Start composing a reply to the current message."
|
||
(interactive)
|
||
(with-current-buffer mm/hdrs-buffer
|
||
(mm/hdrs-compose 'reply)))
|
||
|
||
(defun mm/compose-forward ()
|
||
"Start composing a forward to the current message."
|
||
(interactive)
|
||
(with-current-buffer mm/hdrs-buffer
|
||
(mm/hdrs-compose 'forward)))
|
||
|
||
(defun mm/compose-new ()
|
||
"Compose a new, empty message."
|
||
(interactive)
|
||
(mm/hdrs-compose 'new))
|
||
|
||
(defun mm/edit-draft ()
|
||
"Start editing the existing draft message at point."
|
||
(interactive)
|
||
(with-current-buffer mm/hdrs-buffer
|
||
(mm/hdrs-compose 'edit)))
|
||
|
||
|
||
|
||
|
||
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
||
(provide 'mm-hdrs)
|