notmuch/emacs/notmuch-print.el
Jonas Bernoulli fc4cda07a9 emacs: use lexical-bindings in all libraries
Doing so causes many new compile warnings.  Some of these warnings
concern genuine changes in behavior that have to be addressed right
away.

Many other warnings are due to unused variables.  Nothing has changed
here, except that the byte-compiler can now detect these pre-existing
and harmless issues.  We delay addressing these issues so that we can
focus on the important ones here.

A third group of warnings concern arguments that are not actually used
inside the function but which cannot be removed because the functions
signature is dictated by some outside convention.  Silencing these
warning is also delayed until subsequent commits.
2021-01-13 07:16:04 -04:00

100 lines
3.2 KiB
EmacsLisp

;;; notmuch-print.el --- printing messages from notmuch -*- lexical-binding: t -*-
;;
;; Copyright © David Edmondson
;;
;; This file is part of Notmuch.
;;
;; Notmuch is free software: you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;;
;; Notmuch is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with Notmuch. If not, see <https://www.gnu.org/licenses/>.
;;
;; Authors: David Edmondson <dme@dme.org>
;;; Code:
(require 'notmuch-lib)
(declare-function notmuch-show-get-prop "notmuch-show" (prop &optional props))
;;; Options
(defcustom notmuch-print-mechanism 'notmuch-print-lpr
"How should printing be done?"
:group 'notmuch-show
:type '(choice
(function :tag "Use lpr" notmuch-print-lpr)
(function :tag "Use ps-print" notmuch-print-ps-print)
(function :tag "Use ps-print then evince" notmuch-print-ps-print/evince)
(function :tag "Use muttprint" notmuch-print-muttprint)
(function :tag "Use muttprint then evince" notmuch-print-muttprint/evince)
(function :tag "Using a custom function")))
;;; Utility functions
(defun notmuch-print-run-evince (file)
"View FILE using 'evince'."
(start-process "evince" nil "evince" file))
(defun notmuch-print-run-muttprint (&optional output)
"Pass the contents of the current buffer to 'muttprint'.
Optional OUTPUT allows passing a list of flags to muttprint."
(apply #'call-process-region (point-min) (point-max)
;; Reads from stdin.
"muttprint"
nil nil nil
;; Show the tags.
"--printed-headers" "Date_To_From_CC_Newsgroups_*Subject*_/Tags/"
output))
;;; User-visible functions
(defun notmuch-print-lpr (msg)
"Print a message buffer using lpr."
(lpr-buffer))
(defun notmuch-print-ps-print (msg)
"Print a message buffer using the ps-print package."
(let ((subject (notmuch-prettify-subject
(plist-get (notmuch-show-get-prop :headers msg) :Subject))))
(rename-buffer subject t)
(ps-print-buffer)))
(defun notmuch-print-ps-print/evince (msg)
"Preview a message buffer using ps-print and evince."
(let ((ps-file (make-temp-file "notmuch" nil ".ps"))
(subject (notmuch-prettify-subject
(plist-get (notmuch-show-get-prop :headers msg) :Subject))))
(rename-buffer subject t)
(ps-print-buffer ps-file)
(notmuch-print-run-evince ps-file)))
(defun notmuch-print-muttprint (msg)
"Print a message using muttprint."
(notmuch-print-run-muttprint))
(defun notmuch-print-muttprint/evince (msg)
"Preview a message buffer using muttprint and evince."
(let ((ps-file (make-temp-file "notmuch" nil ".ps")))
(notmuch-print-run-muttprint (list "--printer" (concat "TO_FILE:" ps-file)))
(notmuch-print-run-evince ps-file)))
(defun notmuch-print-message (msg)
"Print a message using the user-selected mechanism."
(set-buffer-modified-p nil)
(funcall notmuch-print-mechanism msg))
;;; _
(provide 'notmuch-print)
;;; notmuch-print.el ends here