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a3e712fa86
Some of the recent changes to the emacs code have used functions introduced in emacs 24. The functions used are read-char-choice and setq-local. This changeset adds a file notmuch-compat.el which contains compatibility functions so that it should work on emacs 23. Note, since these functions are taken almost unchanged from the emacs source they are copyright the Free Software Foundation, and the header in the file reflects that.
95 lines
3.5 KiB
EmacsLisp
95 lines
3.5 KiB
EmacsLisp
;;; notmuch-company.el --- Mail address completion for notmuch via company-mode -*- lexical-binding: t -*-
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;; Authors: Trevor Jim <tjim@mac.com>
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;; Michal Sojka <sojkam1@fel.cvut.cz>
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;;
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;; Keywords: mail, completion
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;; This program 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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;; This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; To enable this, install company mode (https://company-mode.github.io/)
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;;
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;; NB company-minimum-prefix-length defaults to 3 so you don't get
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;; completion unless you type 3 characters
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;;; Code:
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(eval-when-compile (require 'cl))
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(require 'notmuch-lib)
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(defvar notmuch-company-last-prefix nil)
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(make-variable-buffer-local 'notmuch-company-last-prefix)
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(declare-function company-begin-backend "company")
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(declare-function company-grab "company")
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(declare-function company-mode "company")
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(declare-function company-manual-begin "company")
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(defvar company-backends)
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(declare-function notmuch-address-harvest "notmuch-address")
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(declare-function notmuch-address-harvest-trigger "notmuch-address")
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(declare-function notmuch-address-matching "notmuch-address")
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(defvar notmuch-address-full-harvest-finished)
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(defvar notmuch-address-completion-headers-regexp)
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;;;###autoload
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(defun notmuch-company-setup ()
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(company-mode)
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(make-local-variable 'company-backends)
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(setq company-backends '(notmuch-company))
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;; Disable automatic company completion unless an internal
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;; completion method is configured. Company completion (using
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;; internal completion) can still be accessed via standard company
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;; functions, e.g., company-complete.
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(unless (eq notmuch-address-command 'internal)
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(notmuch-setq-local company-idle-delay nil)))
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;;;###autoload
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(defun notmuch-company (command &optional arg &rest _ignore)
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"`company-mode' completion back-end for `notmuch'."
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(interactive (list 'interactive))
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(require 'company)
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(let ((case-fold-search t)
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(completion-ignore-case t))
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(case command
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(interactive (company-begin-backend 'notmuch-company))
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(prefix (and (derived-mode-p 'message-mode)
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(looking-back (concat notmuch-address-completion-headers-regexp ".*")
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(line-beginning-position))
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(setq notmuch-company-last-prefix (company-grab "[:,][ \t]*\\(.*\\)" 1 (point-at-bol)))))
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(candidates (cond
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(notmuch-address-full-harvest-finished
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;; Update harvested addressed from time to time
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(notmuch-address-harvest-trigger)
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(notmuch-address-matching arg))
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(t
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(cons :async
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(lambda (callback)
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;; First run quick asynchronous harvest based on what the user entered so far
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(notmuch-address-harvest
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arg nil
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(lambda (_proc _event)
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(funcall callback (notmuch-address-matching arg))
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;; Then start the (potentially long-running) full asynchronous harvest if necessary
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(notmuch-address-harvest-trigger))))))))
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(match (if (string-match notmuch-company-last-prefix arg)
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(match-end 0)
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0))
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(no-cache t))))
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(provide 'notmuch-company)
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;;; notmuch-company.el ends here
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