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;;; ecomplete.el --- electric completion of addresses and the like
;; Copyright (C) 2006-2011 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: mail
;; This file is part of GNU Emacs.
;; GNU Emacs 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.
;; GNU Emacs 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(eval-when-compile
(require 'cl))
(eval-when-compile
(when (featurep 'xemacs)
;; The `kbd' macro requires that the `read-kbd-macro' macro is available.
(require 'edmacro)))
(defgroup ecomplete nil
"Electric completion of email addresses and the like."
:group 'mail)
(defcustom ecomplete-database-file "~/.ecompleterc"
"*The name of the file to store the ecomplete data."
:group 'ecomplete
:type 'file)
(defcustom ecomplete-database-file-coding-system 'iso-2022-7bit
"Coding system used for writing the ecomplete database file."
:type '(symbol :tag "Coding system")
:group 'ecomplete)
;;; Internal variables.
(defvar ecomplete-database nil)
;;;###autoload
(defun ecomplete-setup ()
(when (file-exists-p ecomplete-database-file)
(with-temp-buffer
(let ((coding-system-for-read ecomplete-database-file-coding-system))
(insert-file-contents ecomplete-database-file)
(setq ecomplete-database (read (current-buffer)))))))
(defun ecomplete-add-item (type key text)
(let ((elems (assq type ecomplete-database))
(now (string-to-number
(format "%.0f" (if (featurep 'emacs)
(float-time)
(require 'gnus-util)
(gnus-float-time)))))
entry)
(unless elems
(push (setq elems (list type)) ecomplete-database))
(if (setq entry (assoc key (cdr elems)))
(setcdr entry (list (1+ (cadr entry)) now text))
(nconc elems (list (list key 1 now text))))))
(defun ecomplete-get-item (type key)
(assoc key (cdr (assq type ecomplete-database))))
(defun ecomplete-save ()
(with-temp-buffer
(let ((coding-system-for-write ecomplete-database-file-coding-system))
(insert "(")
(loop for (type . elems) in ecomplete-database
do
(insert (format "(%s\n" type))
(dolist (entry elems)
(prin1 entry (current-buffer))
(insert "\n"))
(insert ")\n"))
(insert ")")
(write-region (point-min) (point-max)
ecomplete-database-file nil 'silent))))
(defun ecomplete-get-matches (type match)
(let* ((elems (cdr (assq type ecomplete-database)))
(match (regexp-quote match))
(candidates
(sort
(loop for (key count time text) in elems
when (string-match match text)
collect (list count time text))
(lambda (l1 l2)
(> (car l1) (car l2))))))
(when (> (length candidates) 10)
(setcdr (nthcdr 10 candidates) nil))
(unless (zerop (length candidates))
(with-temp-buffer
(dolist (candidate candidates)
(insert (caddr candidate) "\n"))
(goto-char (point-min))
(put-text-property (point) (1+ (point)) 'ecomplete t)
(while (re-search-forward match nil t)
(put-text-property (match-beginning 0) (match-end 0)
'face 'isearch))
(buffer-string)))))
(defun ecomplete-display-matches (type word &optional choose)
(let* ((matches (ecomplete-get-matches type word))
(line 0)
(max-lines (when matches (- (length (split-string matches "\n")) 2)))
(message-log-max nil)
command highlight)
(if (not matches)
(progn
(message "No ecomplete matches")
nil)
(if (not choose)
(progn
(message "%s" matches)
nil)
(setq highlight (ecomplete-highlight-match-line matches line))
(let ((local-map (make-sparse-keymap))
selected)
(define-key local-map (kbd "RET")
(lambda () (setq selected (nth line (split-string matches "\n")))))
(define-key local-map (kbd "M-n")
(lambda () (setq line (min (1+ line) max-lines))))
(define-key local-map (kbd "M-p")
(lambda () (setq line (max (1- line) 0))))
(let ((overriding-local-map local-map))
(while (and (null selected)
(setq command (read-key-sequence highlight))
(lookup-key local-map command))
(apply (key-binding command) nil)
(setq highlight (ecomplete-highlight-match-line matches line))))
(if selected
(message selected)
(message "Abort"))
selected)))))
(defun ecomplete-highlight-match-line (matches line)
(with-temp-buffer
(insert matches)
(goto-char (point-min))
(forward-line line)
(save-restriction
(narrow-to-region (point) (point-at-eol))
(while (not (eobp))
;; Put the 'region face on any characters on this line that
;; aren't already highlighted.
(unless (get-text-property (point) 'face)
(put-text-property (point) (1+ (point)) 'face 'highlight))
(forward-char 1)))
(buffer-string)))
(provide 'ecomplete)
;;; ecomplete.el ends here
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