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Re: A feature to go to last edit locations
From: |
Jean Louis |
Subject: |
Re: A feature to go to last edit locations |
Date: |
Mon, 13 Feb 2023 22:24:02 +0300 |
User-agent: |
Mutt/2.2.9+54 (af2080d) (2022-11-21) |
* Dmitry Gutov <dgutov@yandex.ru> [2023-02-12 21:09]:
> On 12/02/2023 19:41, Daniel Martín wrote:
> > What do you think? Third-party packages like goto-last-change.el [2] or
> > session.el [3] (see session-jump-to-last-change) implement this feature
> > in a per-buffer basis, but I wonder if we could do better and implement
> > something that works across buffers.
>
> I agree this kind of feature should work across buffers (and that's my main
> criticism of the global/local marks feature already).
I was reading, thanks, it inspired me.
But Eli said something important, why go somewhere back randomly, but
better going where user marked it to need it.
Now I get it with single click: S-C-<down> to record point and then
S-C-<left> and <right> to go to previous or next one.
It is using database, but it may serve for brainstorming. I also try
to use database tables to switch to them, instead of buffers with
files.
Emacs has SQLite built-in, this way of work could be used in future,
or package could easily be made.
It would persist over sessions without problems.
And I could make a switch that instead of moving over global points,
and buffers, to move only in single buffer.
(defvar rcd-db-emacs-point-id nil
"Last Emacs point ID where user jumped to.")
(defun rcd-db-emacs-point-next ()
"Go to next Emacs point."
(interactive)
(let ((next (rcd-db-emacs-point-to-go "next")))
next))
(defun rcd-db-emacs-point-previous ()
"Go to previous Emacs point."
(interactive)
(let ((previous (rcd-db-emacs-point-to-go "previous")))
previous))
(defun rcd-db-emacs-point-go-to (id)
"Go to Emacs point ID."
(let ((point (rcd-db-table-id-hash "emacspoints" id cf-db)))
(when (hash-table-keys point)
(let ((buffer-name (gethash "emacspoints_buffername" point))
(file-name (gethash "emacspoints_bufferfilename" point))
(table (gethash "emacspoints_table" point))
(column (gethash "emacspoints_column" point))
(table-id (gethash "emacspoints_tableid" point))
(point (gethash "emacspoints_point" point)))
(cond ((and buffer-name
(buffer-live-p (get-buffer buffer-name))
(not file-name)
(not table))
(switch-to-buffer buffer-name)
(goto-char point))
((and buffer-name file-name
(buffer-live-p (get-buffer buffer-name))
(not table))
(switch-to-buffer buffer-name)
(goto-char point))
((and buffer-name file-name
(not (buffer-live-p (get-buffer buffer-name)))
(not table))
(find-file file-name)
(goto-char point))
((and buffer-name table column table-id
(buffer-live-p (get-buffer buffer-name)))
(switch-to-buffer buffer-name)
(goto-char point))
((and buffer-name table column table-id
(not (buffer-live-p (get-buffer buffer-name))))
(hyperscope-edit-with-mode table-id column)
(switch-to-buffer buffer-name)
(goto-char point))
(t (rcd-message "Point ID %s not found" id)))))))
(keymap-global-set "M-s-<left>" #'rcd-db-emacs-point-previous)
(keymap-global-set "M-s-<right>" #'rcd-db-emacs-point-next)
(keymap-global-set "M-s-<down>" #'rcd-db-emacs-point-record)
(defun rcd-db-emacs-point-to-go (direction)
"Return next Emacs point to go by using DIRECTION.
DIRECTION is string that may be \"previous\" or \"next\"."
(when (string-match "^next$\\|^previous$" direction)
(let ((last (rcd-sql-first "SELECT emacspoints_id FROM emacspoints ORDER BY
emacspoints_id DESC LIMIT 1" cf-db))
(first (rcd-sql-first "SELECT emacspoints_id FROM emacspoints ORDER
BY emacspoints_id ASC LIMIT 1" cf-db))
(message (format "No %s point found" direction))
(next (when (integerp rcd-db-emacs-point-id)
(rcd-sql-first
"SELECT emacspoints_id FROM emacspoints WHERE emacspoints_id
> $1 ORDER BY emacspoints_id ASC LIMIT 1"
cf-db rcd-db-emacs-point-id)))
(previous (when (integerp rcd-db-emacs-point-id)
(rcd-sql-first
"SELECT emacspoints_id FROM emacspoints WHERE
emacspoints_id < $1 ORDER BY emacspoints_id DESC LIMIT 1"
cf-db rcd-db-emacs-point-id))))
(cond ((and (string= direction "previous")
rcd-db-emacs-point-id
previous)
(rcd-db-emacs-point-go-to
(setq rcd-db-emacs-point-id previous)))
((and (string= direction "previous")
rcd-db-emacs-point-id
(null previous)
last)
(rcd-db-emacs-point-go-to
(setq rcd-db-emacs-point-id last)))
((and (string= direction "previous")
rcd-db-emacs-point-id
(null previous)
(null last))
(rcd-message message))
((and (string= direction "next")
rcd-db-emacs-point-id
next)
(rcd-db-emacs-point-go-to
(setq rcd-db-emacs-point-id next)))
((and (string= direction "next")
rcd-db-emacs-point-id
(null next)
first)
(rcd-db-emacs-point-go-to
(setq rcd-db-emacs-point-id first)))
(t (rcd-message message))))))
(defun rcd-db-emacs-point-record ()
"Record Emacs point in the database."
(interactive)
(let* ((buffer-name (buffer-name))
(file-name (buffer-file-name))
(table rcd-db-current-table)
(column rcd-db-current-column)
(table-id rcd-db-current-table-id)
(db-handle rcd-db-current-database-handle)
(db-name (cond ((and db-handle (rcd-sql-first "SELECT
current_database()" db-handle))
(t nil))))
(point (point))
(name (cond (current-prefix-arg (rcd-ask-get "Point name: "))
(table (format "DB: %s, table: %s, column: %s, ID: %s"
db-name table column table-id))
((not file-name) (format "Buffer: %s" buffer-name))
(t (format "File: %s" file-name))))
(description (cond (current-prefix-arg (sql-escape-string (rcd-ask
"Point description: ")))
(t "NULL")))
(table-uuid (when (and table-id
(rcd-db-uuid-by-id table table-id cf-db))
(rcd-db-uuid-by-id table table-id cf-db))))
(rcd-sql-first
(format "INSERT INTO emacspoints
(emacspoints_name, emacspoints_description,
emacspoints_buffername, emacspoints_bufferfilename, emacspoints_dbname,
emacspoints_table, emacspoints_column, emacspoints_tableid,
emacspoints_tableuuid, emacspoints_point)
VALUES ($1, %s, $2, %s, %s, %s, %s, %s, %s, $3)
ON CONFLICT DO NOTHING
RETURNING emacspoints_id" description
(sql-escape-string-or-null file-name) (sql-escape-string-or-null
db-name)
(sql-escape-string-or-null table) (sql-escape-string-or-null
column) (or table-id "NULL")
(sql-escape-string-or-null table-uuid))
cf-db name buffer-name point)))
--
Jean
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Re: A feature to go to last edit locations, Dmitry Gutov, 2023/02/12
Re: A feature to go to last edit locations,
Jean Louis <=
- Re: A feature to go to last edit locations, Dmitry Gutov, 2023/02/13
- Re: A feature to go to last edit locations, Dr. Arne Babenhauserheide, 2023/02/13
- Re: A feature to go to last edit locations, Jean Louis, 2023/02/13
- Re: A feature to go to last edit locations, Eli Zaretskii, 2023/02/13
- RE: [External] : Re: A feature to go to last edit locations, Drew Adams, 2023/02/13
- RE: [External] : Re: A feature to go to last edit locations, Drew Adams, 2023/02/13
- Re: [External] : Re: A feature to go to last edit locations, Jean Louis, 2023/02/14
- RE: [External] : Re: A feature to go to last edit locations, Drew Adams, 2023/02/14
- Re: [External] : Re: A feature to go to last edit locations, Jean Louis, 2023/02/15
- RE: [External] : Re: A feature to go to last edit locations, Drew Adams, 2023/02/15