Add a copy of edit-indirect
This commit is contained in:
parent
8d607d9acb
commit
b40e15664c
388
stuff/edit-indirect.el
Normal file
388
stuff/edit-indirect.el
Normal file
@ -0,0 +1,388 @@
|
||||
;;; edit-indirect.el --- Edit regions in separate buffers -*- lexical-binding: t -*-
|
||||
|
||||
;; Author: Fanael Linithien <fanael4@gmail.com>
|
||||
;; URL: https://github.com/Fanael/edit-indirect
|
||||
;; Version: 0.1.5
|
||||
;; Package-Requires: ((emacs "24.3"))
|
||||
|
||||
;; This file is NOT part of GNU Emacs.
|
||||
|
||||
;; SPDX-License-Identifier: BSD-2-clause
|
||||
;;
|
||||
;; Copyright (c) 2014-2017, Fanael Linithien
|
||||
;; All rights reserved.
|
||||
;;
|
||||
;; Redistribution and use in source and binary forms, with or without
|
||||
;; modification, are permitted provided that the following conditions are
|
||||
;; met:
|
||||
;;
|
||||
;; * Redistributions of source code must retain the above copyright
|
||||
;; notice, this list of conditions and the following disclaimer.
|
||||
;; * Redistributions in binary form must reproduce the above copyright
|
||||
;; notice, this list of conditions and the following disclaimer in the
|
||||
;; documentation and/or other materials provided with the distribution.
|
||||
;;
|
||||
;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
|
||||
;; IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||||
;; TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
||||
;; PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
|
||||
;; OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
;; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
;; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||||
;; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||||
;; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||||
;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
;;; Commentary:
|
||||
|
||||
;; Edit regions in separate buffers, like `org-edit-src-code' but for arbitrary
|
||||
;; regions.
|
||||
;;
|
||||
;; See the docstring of `edit-indirect-region' for details.
|
||||
|
||||
;;; Code:
|
||||
(defgroup edit-indirect nil
|
||||
"Editing regions in separate buffers."
|
||||
:group 'editing)
|
||||
|
||||
(defcustom edit-indirect-guess-mode-function #'edit-indirect-default-guess-mode
|
||||
"The function used to guess the major mode of an edit-indirect buffer.
|
||||
It's called with the edit-indirect buffer as the current buffer.
|
||||
It's called with three arguments, the parent buffer, the beginning
|
||||
and the end of the parent buffer region being editing.
|
||||
|
||||
Note that the buffer-local value from the parent buffer is used."
|
||||
:type 'function
|
||||
:group 'edit-indirect)
|
||||
|
||||
(defcustom edit-indirect-after-creation-hook nil
|
||||
"Functions called after the edit-indirect buffer is created.
|
||||
The functions are called with the edit-indirect buffer as the
|
||||
current buffer.
|
||||
|
||||
Note that the buffer-local value from the parent buffer is used."
|
||||
:type 'hook
|
||||
:group 'edit-indirect)
|
||||
|
||||
(defcustom edit-indirect-before-commit-hook nil
|
||||
"Functions called before the edit-indirect buffer is committed.
|
||||
The functions are called with the edit-indirect buffer as the
|
||||
current buffer.
|
||||
|
||||
Note that the buffer-local value from the edit-indirect buffer is
|
||||
used."
|
||||
:type 'hook
|
||||
:group 'edit-indirect)
|
||||
|
||||
(defcustom edit-indirect-before-commit-functions nil
|
||||
"Functions called before an edit-indirect buffer is committed.
|
||||
The functions are called with the parent buffer as the current
|
||||
buffer.
|
||||
Each function is called with two arguments, the beginning and the
|
||||
end of the region to be changed."
|
||||
:type 'hook
|
||||
:group 'edit-indirect)
|
||||
|
||||
(defcustom edit-indirect-after-commit-functions nil
|
||||
"Functions called after an edit-indirect buffer has been committed.
|
||||
The functions are called with the parent buffer as the current
|
||||
buffer.
|
||||
Each function is called with two arguments, the beginning and the
|
||||
end of the changed region."
|
||||
:type 'hook
|
||||
:group 'edit-indirect)
|
||||
|
||||
(defgroup edit-indirect-faces nil
|
||||
"Faces used in `edit-indirect'."
|
||||
:group 'edit-indirect
|
||||
:group 'faces
|
||||
:prefix "edit-indirect")
|
||||
|
||||
(defface edit-indirect-edited-region
|
||||
'((t :inherit secondary-selection))
|
||||
"Face used to highlight an indirectly edited region."
|
||||
:group 'edit-indirect-faces)
|
||||
|
||||
;; Emacs <= 24.3 has no `define-error'.
|
||||
(let* ((user-error-conditions (get 'user-error 'error-conditions))
|
||||
(define-user-error (lambda (name message)
|
||||
(put name 'error-conditions
|
||||
(cons name user-error-conditions))
|
||||
(put name 'error-message message))))
|
||||
(funcall define-user-error 'edit-indirect-overlapping
|
||||
"Indirectly edited regions cannot overlap")
|
||||
(funcall define-user-error 'edit-indirect-read-only
|
||||
"Text is read-only, modify the edit-indirect buffer instead")
|
||||
(funcall define-user-error 'edit-indirect-not-indirect
|
||||
"This is not an edit-indirect buffer"))
|
||||
|
||||
(defvar edit-indirect--overlay)
|
||||
(defvar edit-indirect--should-quit-window nil)
|
||||
|
||||
;;;###autoload
|
||||
(defun edit-indirect-region (beg end &optional display-buffer)
|
||||
"Edit the region BEG..END in a separate buffer.
|
||||
The region is copied, without text properties, to a separate
|
||||
buffer, called edit-indirect buffer, and
|
||||
`edit-indirect-guess-mode-function' is called to set the major
|
||||
mode.
|
||||
When done, exit with `edit-indirect-commit', which will remove the
|
||||
original region and replace it with the edited version; or with
|
||||
`edit-indirect-abort', which will drop the modifications.
|
||||
|
||||
This differs from `clone-indirect-buffer' with narrowing in that
|
||||
the text properties are not shared, so the parent buffer major mode
|
||||
and the edit-indirect buffer major mode will not be able to tread
|
||||
on each other's toes by setting up potentially conflicting text
|
||||
properties, which happens surprisingly often when the font-lock
|
||||
mode is used.
|
||||
|
||||
Edit-indirect buffers use the `edit-indirect-mode-map' keymap.
|
||||
|
||||
If there's already an edit-indirect buffer for BEG..END, use that.
|
||||
If there's already an edit-indirect buffer active overlapping any
|
||||
portion of BEG..END, an `edit-indirect-overlapping' error is
|
||||
signaled.
|
||||
|
||||
When DISPLAY-BUFFER is non-nil or when called interactively,
|
||||
display the edit-indirect buffer in some window and select it.
|
||||
|
||||
In any case, return the edit-indirect buffer."
|
||||
(interactive
|
||||
(if (or (use-region-p) (not transient-mark-mode))
|
||||
(prog1 (list (region-beginning) (region-end) t)
|
||||
(deactivate-mark))
|
||||
(user-error "No region")))
|
||||
(let ((buffer (edit-indirect--get-edit-indirect-buffer beg end)))
|
||||
(when display-buffer
|
||||
(with-current-buffer buffer
|
||||
(setq-local edit-indirect--should-quit-window t))
|
||||
(select-window (display-buffer buffer)))
|
||||
buffer))
|
||||
|
||||
(defvar edit-indirect-mode-map
|
||||
(let ((map (make-sparse-keymap)))
|
||||
(define-key map (kbd "C-x C-s") #'edit-indirect-save)
|
||||
(define-key map (kbd "C-c '") #'edit-indirect-commit)
|
||||
(define-key map (kbd "C-c C-c") #'edit-indirect-commit)
|
||||
(define-key map (kbd "C-c C-k") #'edit-indirect-abort)
|
||||
map)
|
||||
"Keymap for edit-indirect buffers.
|
||||
|
||||
\\{edit-indirect-mode-map}")
|
||||
|
||||
(defun edit-indirect-commit ()
|
||||
"Commit the modifications done in an edit-indirect buffer.
|
||||
That is, replace the original region in the parent buffer with the
|
||||
contents of the edit-indirect buffer.
|
||||
The edit-indirect buffer is then killed.
|
||||
|
||||
Can be called only when the current buffer is an edit-indirect
|
||||
buffer."
|
||||
(interactive)
|
||||
(edit-indirect--barf-if-not-indirect)
|
||||
(edit-indirect--commit)
|
||||
(edit-indirect--clean-up))
|
||||
|
||||
(defun edit-indirect-save ()
|
||||
"Save the modifications done in an edit-indirect buffer.
|
||||
That is, replace the original region in the parent buffer with the
|
||||
contents of the edit-indirect buffer.
|
||||
|
||||
Can be called only when the current buffer is an edit-indirect
|
||||
buffer."
|
||||
(interactive)
|
||||
(edit-indirect--barf-if-not-indirect)
|
||||
(edit-indirect--commit))
|
||||
|
||||
(defun edit-indirect-abort ()
|
||||
"Abort indirect editing in the current buffer and kill the buffer.
|
||||
|
||||
Can be called only when the current buffer is an edit-indirect
|
||||
buffer."
|
||||
(interactive)
|
||||
(edit-indirect--barf-if-not-indirect)
|
||||
(edit-indirect--abort))
|
||||
|
||||
(defun edit-indirect-buffer-indirect-p (&optional buffer)
|
||||
"Non-nil iff the BUFFER is an edit-indirect buffer.
|
||||
BUFFER defaults to the current buffer."
|
||||
(save-current-buffer
|
||||
(when buffer
|
||||
(set-buffer buffer))
|
||||
;; (not (null)) so we don't leak the overlay to the outside world.
|
||||
(not (null edit-indirect--overlay))))
|
||||
|
||||
(defun edit-indirect-default-guess-mode (_parent-buffer _beg _end)
|
||||
"Guess the major mode for an edit-indirect buffer.
|
||||
It's done by calling `normal-mode'."
|
||||
(normal-mode))
|
||||
|
||||
(defvar edit-indirect--overlay nil
|
||||
"The overlay spanning the region of the parent buffer being edited.
|
||||
|
||||
It's also used as the variable determining if we're in an
|
||||
edit-indirect buffer at all.")
|
||||
(make-variable-buffer-local 'edit-indirect--overlay)
|
||||
(put 'edit-indirect--overlay 'permanent-local t)
|
||||
|
||||
;; Normally this would use `define-minor-mode', but that makes the mode function
|
||||
;; interactive, which we don't want, because it's just an implementation detail.
|
||||
(defun edit-indirect--mode (overlay)
|
||||
"Turn the `edit-indirect--mode' \"minor mode\" on.
|
||||
OVERLAY is the value to set `edit-indirect--overlay' to."
|
||||
(setq edit-indirect--overlay overlay)
|
||||
(add-hook 'kill-buffer-hook #'edit-indirect--abort-on-kill-buffer nil t))
|
||||
(with-no-warnings
|
||||
(add-minor-mode
|
||||
'edit-indirect--overlay " indirect" edit-indirect-mode-map nil #'ignore))
|
||||
|
||||
(defun edit-indirect--get-edit-indirect-buffer (beg end)
|
||||
"Return an edit-indirect buffer for the region BEG..END.
|
||||
If there's already an edit-indirect buffer active overlapping any
|
||||
portion of BEG..END, an `edit-indirect-overlapping' error is
|
||||
signaled."
|
||||
(let ((old-overlay (edit-indirect--search-for-edit-indirect beg end)))
|
||||
(cond
|
||||
((null old-overlay)
|
||||
(let ((overlay (edit-indirect--create-overlay beg end)))
|
||||
(edit-indirect--create-indirect-buffer beg end overlay)))
|
||||
((and (= beg (overlay-start old-overlay))
|
||||
(= end (overlay-end old-overlay)))
|
||||
(overlay-get old-overlay 'edit-indirect-buffer))
|
||||
(t
|
||||
(signal 'edit-indirect-overlapping '())))))
|
||||
|
||||
(defun edit-indirect--search-for-edit-indirect (beg end)
|
||||
"Return an existing edit-indirect overlay for some region inside BEG..END.
|
||||
If there's no indirectly edited region inside BEG..END, return
|
||||
nil."
|
||||
(catch 'done
|
||||
(dolist (overlay (overlays-in beg end))
|
||||
(when (overlay-get overlay 'edit-indirect-buffer)
|
||||
(throw 'done overlay)))
|
||||
nil))
|
||||
|
||||
(defmacro edit-indirect--buffer-local-value (buffer variable)
|
||||
"Get the BUFFER local value of VARIABLE.
|
||||
VARIABLE shall be a symbol."
|
||||
(unless (symbolp variable)
|
||||
(signal 'wrong-type-argument (list #'symbolp variable)))
|
||||
;; `with-current-buffer' is used instead of `buffer-local-value' because
|
||||
;; the latter doesn't give warnings about free variables when
|
||||
;; byte-compiled.
|
||||
`(with-current-buffer ,buffer ,variable))
|
||||
|
||||
(defun edit-indirect--create-indirect-buffer (beg end overlay)
|
||||
"Create an edit-indirect buffer and return it.
|
||||
|
||||
BEG..END is the parent buffer region to insert.
|
||||
OVERLAY is the overlay, see `edit-indirect--overlay'."
|
||||
(let ((buffer (generate-new-buffer (format "*edit-indirect %s*" (buffer-name))))
|
||||
(parent-buffer (current-buffer)))
|
||||
(overlay-put overlay 'edit-indirect-buffer buffer)
|
||||
(with-current-buffer buffer
|
||||
(insert-buffer-substring-no-properties parent-buffer beg end)
|
||||
(set-buffer-modified-p nil)
|
||||
(edit-indirect--mode overlay)
|
||||
;; Use the buffer-local values from the parent buffer. Don't retrieve the
|
||||
;; values before actual uses in case these variables are changed by some
|
||||
;; of the many possible hooks.
|
||||
(funcall (edit-indirect--buffer-local-value
|
||||
parent-buffer edit-indirect-guess-mode-function)
|
||||
parent-buffer beg end)
|
||||
(let ((edit-indirect-after-creation-hook
|
||||
(edit-indirect--buffer-local-value
|
||||
parent-buffer edit-indirect-after-creation-hook)))
|
||||
(run-hooks 'edit-indirect-after-creation-hook)))
|
||||
buffer))
|
||||
|
||||
(defun edit-indirect--create-overlay (beg end)
|
||||
"Create the edit-indirect overlay and return it.
|
||||
|
||||
BEG and END specify the region the overlay should encompass."
|
||||
(let ((overlay (make-overlay beg end)))
|
||||
(overlay-put overlay 'face 'edit-indirect-edited-region)
|
||||
(overlay-put overlay 'modification-hooks '(edit-indirect--barf-read-only))
|
||||
(overlay-put overlay 'insert-in-front-hooks '(edit-indirect--barf-read-only))
|
||||
overlay))
|
||||
|
||||
(defvar edit-indirect--inhibit-read-only nil
|
||||
"Non-nil means disregard read-only status of indirectly-edited region.")
|
||||
|
||||
(defun edit-indirect--barf-read-only (_ov _after _beg _end &optional _len)
|
||||
"Signal an error because the text is read-only.
|
||||
No error is signaled if `inhibit-read-only' or
|
||||
`edit-indirect--inhibit-read-only' is non-nil."
|
||||
(unless (or inhibit-read-only edit-indirect--inhibit-read-only)
|
||||
(signal 'edit-indirect-read-only '())))
|
||||
|
||||
(defun edit-indirect--commit ()
|
||||
"Commit the modifications done in an edit-indirect buffer."
|
||||
(run-hooks 'edit-indirect-before-commit-hook)
|
||||
(let ((beg (overlay-start edit-indirect--overlay))
|
||||
(end (overlay-end edit-indirect--overlay))
|
||||
(buffer (current-buffer))
|
||||
(edit-indirect--inhibit-read-only t))
|
||||
(with-current-buffer (overlay-buffer edit-indirect--overlay)
|
||||
(save-excursion
|
||||
(let ((beg-marker (copy-marker beg))
|
||||
(end-marker (copy-marker end)))
|
||||
(edit-indirect--run-hook-with-positions
|
||||
'edit-indirect-before-commit-functions beg-marker end-marker)
|
||||
(save-match-data
|
||||
(set-match-data (list beg-marker end-marker))
|
||||
(replace-match (with-current-buffer buffer
|
||||
(buffer-substring-no-properties 1 (1+ (buffer-size))))
|
||||
t t))
|
||||
(edit-indirect--run-hook-with-positions
|
||||
'edit-indirect-after-commit-functions beg-marker (point))
|
||||
(set-marker beg-marker nil)
|
||||
(set-marker end-marker nil))))))
|
||||
|
||||
(defun edit-indirect--run-hook-with-positions (hook beg end)
|
||||
"Run HOOK with the specified positions BEG and END.
|
||||
HOOK should be a symbol, a hook variable.
|
||||
The functions are passed integer positions.
|
||||
If a function changes the buffer contents, the next function will be
|
||||
called with updated positions."
|
||||
(let ((beg-marker (unless (markerp beg) (copy-marker beg)))
|
||||
(end-marker (unless (markerp end) (copy-marker end))))
|
||||
(run-hook-wrapped hook
|
||||
(lambda (f beg end)
|
||||
(funcall f (marker-position beg) (marker-position end))
|
||||
nil)
|
||||
(or beg-marker beg) (or end-marker end))
|
||||
(when beg-marker (set-marker beg-marker nil))
|
||||
(when end-marker (set-marker end-marker nil))))
|
||||
|
||||
(defun edit-indirect--abort ()
|
||||
"Abort indirect edit."
|
||||
(edit-indirect--clean-up))
|
||||
|
||||
(defun edit-indirect--clean-up ()
|
||||
"Clean up an edit-indirect buffer."
|
||||
(delete-overlay edit-indirect--overlay)
|
||||
;; Kill the overlay reference so that `edit-indirect--abort-on-kill-buffer'
|
||||
;; won't try to call us again.
|
||||
(setq edit-indirect--overlay nil)
|
||||
;; If we created a window, get rid of it. Kill the buffer we created.
|
||||
(if edit-indirect--should-quit-window
|
||||
(quit-window t)
|
||||
(kill-buffer)))
|
||||
|
||||
(defun edit-indirect--abort-on-kill-buffer ()
|
||||
"Abort indirect edit.
|
||||
Should be called only from `kill-buffer-hook'."
|
||||
(when edit-indirect--overlay
|
||||
(edit-indirect--abort)))
|
||||
|
||||
(defun edit-indirect--barf-if-not-indirect ()
|
||||
"Signal an error if the current buffer is not an edit-indirect buffer.
|
||||
The error signaled is `edit-indirect-not-indirect'."
|
||||
(unless edit-indirect--overlay
|
||||
(signal 'edit-indirect-not-indirect '())))
|
||||
|
||||
(provide 'edit-indirect)
|
||||
;;; edit-indirect.el ends here
|
||||
Loading…
Reference in New Issue
Block a user