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;;; wgrep-deadgrep.el --- Writable deadgrep buffer and apply the changes to files -*- lexical-binding: t -*-
;; Author: Masahiro Hayashi <mhayashi1120@gmail.com>, Iku Iwasa <iku.iwasa@gmail.com>
;; Keywords: grep edit extensions
;; Package-Requires: ((wgrep "2.3.0") (emacs "25.1"))
;; URL: http://github.com/mhayashi1120/Emacs-wgrep/raw/master/wgrep-deadgrep.el
;; Emacs: GNU Emacs 25 or later
;; Version: 2.3.1
;; This program 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, or (at
;; your option) any later version.
;; This program 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; wgrep-deadgrep allows you to edit a deadgrep buffer and apply those changes to
;; the file buffer.
;;; Install:
;; 1. Install deadgrep.el
;;
;; https://github.com/Wilfred/deadgrep
;; 2. Install wgrep.el
;; 3. Put this file into load-path'ed directory, and byte compile it if
;; desired. And put the following expression into your ~/.emacs.
;;
;; (autoload 'wgrep-deadgrep-setup "wgrep-deadgrep")
;; (add-hook 'deadgrep-finished-hook 'wgrep-deadgrep-setup)
;;; Usage:
;; See wgrep.el
;;; Code:
(require 'wgrep)
(defun wgrep-deadgrep-prepare-header&footer ()
"Prepare header in `deadgrep' buffer for `wgrep'.
Since `deadgrep' does not have footer, only header is handled."
;; `deadgrep' uses "deadgrep-filename" property for filename.
(let ((pos (next-single-property-change (point-min) 'deadgrep-filename)))
(if pos
(add-text-properties (point-min) pos '(read-only t wgrep-header t))
(add-text-properties (point-min) (point-max)
'(read-only t wgrep-header t)))))
(defun wgrep-deadgrep-parse-command-results ()
"Parse `deadgrep' results for `wgrep'."
;; Note that this function is called with the buffer narrowed to
;; exclude the header and the footer. (We're going to assert that
;; fact here, because we use (bobp) result a bit further down to
;; decide that we're not reading grouped results; see below.)
(unless (bobp)
(error "Expected to be called with point at beginning of buffer"))
(save-excursion
(while (not (eobp))
(let* ((pos (point))
(filename (get-text-property pos 'deadgrep-filename))
(line (get-text-property pos 'deadgrep-line-number)))
(when filename
(if line
(let* ((eol (line-end-position))
(end (next-single-property-change
pos 'deadgrep-line-number nil eol)))
(add-text-properties pos end
(list 'wgrep-line-filename filename
'wgrep-line-number line)))
;; Ignore the line that introduces matches from a file, so that
;; wgrep doesn't let you edit it.
(add-text-properties
pos (line-end-position)
(list 'wgrep-ignore t
(wgrep-construct-filename-property filename)
filename)))))
(forward-line 1))))
;;;###autoload
(defun wgrep-deadgrep-setup ()
"Setup `wgrep-deadgrep' for `deadgrep'."
(setq wgrep-prepared nil)
(set (make-local-variable 'wgrep-header&footer-parser)
'wgrep-deadgrep-prepare-header&footer)
(set (make-local-variable 'wgrep-results-parser)
'wgrep-deadgrep-parse-command-results)
(wgrep-setup-internal))
;;;###autoload
(add-hook 'deadgrep-finished-hook 'wgrep-deadgrep-setup)
;; For `unload-feature'
(defun wgrep-deadgrep-unload-function ()
"Unload `wgrep-deadgrep' setup."
(remove-hook 'deadgrep-finished-hook 'wgrep-deadgrep-setup))
(provide 'wgrep-deadgrep)
;;; wgrep-deadgrep.el ends here
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