525 lines
18 KiB
EmacsLisp
525 lines
18 KiB
EmacsLisp
;;; quickurl.el --- insert a URL based on text at point in buffer -*- lexical-binding: t; -*-
|
|
|
|
;; Copyright (C) 1999-2024 Free Software Foundation, Inc.
|
|
|
|
;; Author: Dave Pearson <davep@davep.org>
|
|
;; Created: 1999-05-28
|
|
;; Keywords: hypermedia
|
|
;; Obsolete-since: 29.1
|
|
|
|
;; 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 <https://www.gnu.org/licenses/>.
|
|
|
|
;;; Commentary:
|
|
;;
|
|
;; This package provides a simple method of inserting a URL based on the
|
|
;; text at point in the current buffer. This is part of an on-going effort
|
|
;; to increase the information I provide people while reducing the amount
|
|
;; of typing I need to do. No-doubt there are undiscovered Emacs packages
|
|
;; out there that do all of this and do it better, feel free to point me to
|
|
;; them, in the mean time I'm having fun playing with Emacs Lisp.
|
|
;;
|
|
;; The URLs are stored in an external file as a list of either cons cells,
|
|
;; or lists. A cons cell entry looks like this:
|
|
;;
|
|
;; (<Lookup> . <URL>)
|
|
;;
|
|
;; where <Lookup> is a string that acts as the keyword lookup and <URL> is
|
|
;; the URL associated with it. An example might be:
|
|
;;
|
|
;; ("GNU" . "https://www.gnu.org/")
|
|
;;
|
|
;; A list entry looks like:
|
|
;;
|
|
;; (<Lookup> <URL> <Comment>)
|
|
;;
|
|
;; where <Lookup> and <URL> are the same as with the cons cell and <Comment>
|
|
;; is any text you like that describes the URL. This description will be
|
|
;; used when presenting a list of URLS using `quickurl-list'. An example
|
|
;; might be:
|
|
;;
|
|
;; ("FSF" "https://www.fsf.org/" "The Free Software Foundation")
|
|
;;
|
|
;; Given the above, your quickurl file might look like:
|
|
;;
|
|
;; (("GNU" . "https://www.gnu.org/")
|
|
;; ("FSF" "https://www.fsf.org/" "The Free Software Foundation")
|
|
;; ("emacs" . "https://www.emacs.org/")
|
|
;; ("davep" "http://www.davep.org/" "Dave's homepage"))
|
|
;;
|
|
;; In case you're wondering about the mixture of cons cells and lists,
|
|
;; quickurl started life using just the cons cells, there were no comments.
|
|
;; URL comments are a later addition and so there is a mixture to keep
|
|
;; backward compatibility with existing URL lists.
|
|
;;
|
|
;; The name and location of the file is up to you, the default name used by
|
|
;; `quickurl' is stored in `quickurl-url-file'.
|
|
;;
|
|
;; quickurl is always available from:
|
|
;;
|
|
;; <URL:http://www.davep.org/emacs/quickurl.el>
|
|
|
|
;;; TODO:
|
|
;;
|
|
;; o The quickurl-browse-url* functions pretty much duplicate their non
|
|
;; browsing friends. It would feel better if a more generic solution could
|
|
;; be found.
|
|
|
|
;;; Code:
|
|
|
|
;; Things we need:
|
|
|
|
(eval-when-compile (require 'cl-lib))
|
|
(require 'thingatpt)
|
|
(require 'pp)
|
|
(require 'browse-url)
|
|
|
|
;; Customize options.
|
|
|
|
(defgroup quickurl nil
|
|
"Insert a URL based on text at point in buffer."
|
|
:version "21.1"
|
|
:group 'abbrev
|
|
:prefix "quickurl-")
|
|
|
|
(defcustom quickurl-url-file
|
|
(locate-user-emacs-file "quickurls" ".quickurls")
|
|
"File that contains the URL list."
|
|
:version "24.4" ; added locate-user-emacs-file
|
|
:type 'file)
|
|
|
|
(defcustom quickurl-format-function #'quickurl-format-url
|
|
"Function to format the URL before insertion into the current buffer."
|
|
:type 'function)
|
|
|
|
(defcustom quickurl-sort-function #'quickurl-sort-urls
|
|
"Function to sort the URL list."
|
|
:type 'function)
|
|
|
|
(defcustom quickurl-grab-lookup-function #'current-word
|
|
"Function to grab the thing to lookup."
|
|
:type 'function)
|
|
|
|
(defun quickurl--assoc-function (key alist)
|
|
"Default function for `quickurl-assoc-function'."
|
|
(assoc-string key alist t))
|
|
|
|
(defcustom quickurl-assoc-function #'quickurl--assoc-function
|
|
"Function to use for alist lookup into `quickurl-urls'."
|
|
:version "26.1" ; was the obsolete assoc-ignore-case
|
|
:type 'function)
|
|
|
|
(defcustom quickurl-completion-ignore-case t
|
|
"Should `quickurl-ask' ignore case when doing the input lookup?"
|
|
:type 'boolean)
|
|
|
|
(defcustom quickurl-prefix ";; -*- lisp -*-\n\n"
|
|
"Text to write to `quickurl-url-file' before writing the URL list."
|
|
:type 'string)
|
|
|
|
(defcustom quickurl-postfix ""
|
|
"Text to write to `quickurl-url-file' after writing the URL list.
|
|
|
|
See the constant `quickurl-reread-hook-postfix' for some example text that
|
|
could be used here."
|
|
:type 'string)
|
|
|
|
(defcustom quickurl-list-mode-hook nil
|
|
"Hooks for `quickurl-list-mode'."
|
|
:type 'hook)
|
|
|
|
;; Constants.
|
|
|
|
;;;###autoload
|
|
(defconst quickurl-reread-hook-postfix
|
|
"
|
|
;; Local Variables:
|
|
;; eval: (progn (require 'quickurl) (add-hook 'write-file-functions (lambda () (quickurl-read) nil) nil t))
|
|
;; End:
|
|
"
|
|
"Example `quickurl-postfix' text that adds a local variable to the
|
|
`quickurl-url-file' so that if you edit it by hand it will ensure that
|
|
`quickurl-urls' is updated with the new URL list.
|
|
|
|
To make use of this do something like:
|
|
|
|
(setq quickurl-postfix quickurl-reread-hook-postfix)
|
|
|
|
in your init file (after loading/requiring quickurl).")
|
|
|
|
;; Non-customize variables.
|
|
|
|
(defvar quickurl-urls nil
|
|
"URL alist for use with `quickurl' and `quickurl-ask'.")
|
|
|
|
(defvar-keymap quickurl-list-mode-map
|
|
:doc "Local keymap for a `quickurl-list-mode' buffer."
|
|
"a" #'quickurl-list-add-url
|
|
"RET" #'quickurl-list-insert-url
|
|
"u" #'quickurl-list-insert-naked-url
|
|
"SPC" #'quickurl-list-insert-with-lookup
|
|
"l" #'quickurl-list-insert-lookup
|
|
"d" #'quickurl-list-insert-with-desc
|
|
"C-g" #'quickurl-list-quit
|
|
"q" #'quickurl-list-quit
|
|
"<mouse-2>" #'quickurl-list-mouse-select)
|
|
|
|
(defvar quickurl-list-buffer-name "*quickurl-list*"
|
|
"Name for the URL listing buffer.")
|
|
|
|
(defvar quickurl-list-last-buffer nil
|
|
"`current-buffer' when `quickurl-list' was called.")
|
|
|
|
;; Functions for working with a URL entry.
|
|
|
|
(defun quickurl-url-commented-p (url)
|
|
"Does the URL have a comment?"
|
|
(listp (cdr url)))
|
|
|
|
(defun quickurl-make-url (keyword url &optional comment)
|
|
"Create a URL from KEYWORD, URL and (optionally) COMMENT."
|
|
(if (and comment (not (zerop (length comment))))
|
|
(list keyword url comment)
|
|
(cons keyword url)))
|
|
|
|
(defalias 'quickurl-url-keyword #'car
|
|
"Return the keyword for the URL.
|
|
\n\(fn URL)")
|
|
|
|
(defun quickurl-url-url (url)
|
|
"Return the actual URL of the URL.
|
|
|
|
Note that this function is a setfable place."
|
|
(declare (gv-setter (lambda (store)
|
|
`(setf (if (quickurl-url-commented-p ,url)
|
|
(cadr ,url)
|
|
(cdr ,url))
|
|
,store))))
|
|
(if (quickurl-url-commented-p url)
|
|
(cadr url)
|
|
(cdr url)))
|
|
|
|
(defun quickurl-url-comment (url)
|
|
"Get the comment from a URL.
|
|
|
|
If the URL has no comment an empty string is returned. Also note
|
|
that this function is a setfable place."
|
|
(declare
|
|
(gv-setter (lambda (store)
|
|
`(if (quickurl-url-commented-p ,url)
|
|
(if (zerop (length ,store))
|
|
(setf (cdr ,url) (cadr ,url))
|
|
(setf (nth 2 ,url) ,store))
|
|
(unless (zerop (length ,store))
|
|
(setf (cdr ,url) (list (cdr ,url) ,store)))))))
|
|
(if (quickurl-url-commented-p url)
|
|
(nth 2 url)
|
|
""))
|
|
|
|
(defun quickurl-url-description (url)
|
|
"Return a description for the URL.
|
|
|
|
If the URL has a comment then this is returned, otherwise the keyword is
|
|
returned."
|
|
(let ((desc (quickurl-url-comment url)))
|
|
(if (zerop (length desc))
|
|
(quickurl-url-keyword url)
|
|
desc)))
|
|
|
|
;; Main code:
|
|
|
|
(defun quickurl-format-url (url)
|
|
(format "<URL:%s>" (quickurl-url-url url)))
|
|
|
|
(defun quickurl-sort-urls (list)
|
|
"Sort URLs in LIST according to their `quickurl-url-description'."
|
|
(sort list
|
|
(lambda (x y)
|
|
(string<
|
|
(downcase (quickurl-url-description x))
|
|
(downcase (quickurl-url-description y))))))
|
|
|
|
(defun quickurl-read (&optional buffer)
|
|
"`read' the URL list from BUFFER into `quickurl-urls'.
|
|
|
|
BUFFER, if nil, defaults to current buffer.
|
|
Note that this function moves point to `point-min' before doing the `read'
|
|
It also restores point after the `read'."
|
|
(save-excursion
|
|
(goto-char (point-min))
|
|
(setq quickurl-urls (funcall quickurl-sort-function
|
|
(read (or buffer (current-buffer)))))))
|
|
|
|
(defun quickurl-load-urls ()
|
|
"Load the contents of `quickurl-url-file' into `quickurl-urls'."
|
|
(when (file-exists-p quickurl-url-file)
|
|
(with-temp-buffer
|
|
(insert-file-contents quickurl-url-file)
|
|
(quickurl-read))))
|
|
|
|
(defun quickurl-save-urls ()
|
|
"Save the contents of `quickurl-urls' to `quickurl-url-file'."
|
|
(with-temp-buffer
|
|
(let ((standard-output (current-buffer))
|
|
(print-length nil))
|
|
(princ quickurl-prefix)
|
|
(pp quickurl-urls)
|
|
(princ quickurl-postfix)
|
|
(write-region (point-min) (point-max) quickurl-url-file nil 0))))
|
|
|
|
(defun quickurl-find-url (lookup)
|
|
"Return URL associated with key LOOKUP.
|
|
|
|
The lookup is done by looking in the alist `quickurl-urls' and the `cons'
|
|
for the URL is returned. The actual method used to look into the alist
|
|
depends on the setting of the variable `quickurl-assoc-function'."
|
|
(funcall quickurl-assoc-function lookup quickurl-urls))
|
|
|
|
(defun quickurl-insert (url &optional silent)
|
|
"Insert URL, formatted using `quickurl-format-function'.
|
|
|
|
Also display a `message' saying what the URL was unless SILENT is non-nil."
|
|
(insert (funcall quickurl-format-function url))
|
|
(unless silent
|
|
(message "Found %s" (quickurl-url-url url))))
|
|
|
|
;;;###autoload
|
|
(defun quickurl (&optional lookup)
|
|
"Insert a URL based on LOOKUP.
|
|
|
|
If not supplied LOOKUP is taken to be the word at point in the current
|
|
buffer, this default action can be modified via
|
|
`quickurl-grab-lookup-function'."
|
|
(interactive)
|
|
(when (or lookup
|
|
(setq lookup (funcall quickurl-grab-lookup-function)))
|
|
(quickurl-load-urls)
|
|
(let ((url (quickurl-find-url lookup)))
|
|
(if (null url)
|
|
(error "No URL associated with \"%s\"" lookup)
|
|
(when (looking-at "\\w")
|
|
(skip-syntax-forward "\\w"))
|
|
(insert " ")
|
|
(quickurl-insert url)))))
|
|
|
|
;;;###autoload
|
|
(defun quickurl-ask (lookup)
|
|
"Insert a URL, with `completing-read' prompt, based on LOOKUP."
|
|
(interactive
|
|
(list
|
|
(progn
|
|
(quickurl-load-urls)
|
|
(let ((completion-ignore-case quickurl-completion-ignore-case))
|
|
(completing-read "Lookup: " quickurl-urls nil t)))))
|
|
(let ((url (quickurl-find-url lookup)))
|
|
(when url
|
|
(quickurl-insert url))))
|
|
|
|
(defun quickurl-grab-url ()
|
|
"Attempt to grab a word/URL pair from point in the current buffer.
|
|
|
|
Point should be somewhere on the URL and the word is taken to be the thing
|
|
that is returned from calling `quickurl-grab-lookup-function' once a
|
|
`backward-word' has been issued at the start of the URL.
|
|
|
|
It is assumed that the URL is either \"unguarded\" or is wrapped inside an
|
|
<URL:...> wrapper."
|
|
(let ((url (thing-at-point 'url)))
|
|
(when url
|
|
(save-excursion
|
|
(beginning-of-thing 'url)
|
|
;; `beginning-of-thing' doesn't take you to the start of a marked-up
|
|
;; URL, only to the start of the URL within the "markup". So, we
|
|
;; need to do a little more work to get to where we want to be.
|
|
(when (thing-at-point-looking-at thing-at-point-markedup-url-regexp)
|
|
(search-backward "<URL:"))
|
|
(backward-word-strictly 1)
|
|
(let ((word (funcall quickurl-grab-lookup-function)))
|
|
(when word
|
|
(quickurl-make-url
|
|
;; The grab function may return the word with properties. I don't
|
|
;; want the properties. I couldn't find a method of stripping
|
|
;; them from a "string" so this will have to do. If you know of
|
|
;; a better method of doing this I'd love to know.
|
|
(with-temp-buffer
|
|
(insert word)
|
|
(buffer-substring-no-properties (point-min) (point-max)))
|
|
url)))))))
|
|
|
|
;;;###autoload
|
|
(defun quickurl-add-url (word url comment)
|
|
"Allow the user to interactively add a new URL associated with WORD.
|
|
|
|
See `quickurl-grab-url' for details on how the default word/URL combination
|
|
is decided."
|
|
(interactive (let ((word-url (quickurl-grab-url)))
|
|
(list (read-string "Word: " (quickurl-url-keyword word-url))
|
|
(read-string "URL: " (quickurl-url-url word-url))
|
|
(read-string "Comment: " (quickurl-url-comment word-url)))))
|
|
(if (zerop (length word))
|
|
(error "You must specify a WORD for lookup")
|
|
(quickurl-load-urls)
|
|
(let* ((current-url (quickurl-find-url word))
|
|
(add-it (if current-url
|
|
(if (called-interactively-p 'interactive)
|
|
(y-or-n-p (format "\"%s\" exists, replace URL? " word))
|
|
t)
|
|
t)))
|
|
(when add-it
|
|
(if current-url
|
|
(progn
|
|
(setf (quickurl-url-url current-url) url)
|
|
(setf (quickurl-url-comment current-url) comment))
|
|
(push (quickurl-make-url word url comment) quickurl-urls))
|
|
(setq quickurl-urls (funcall quickurl-sort-function quickurl-urls))
|
|
(quickurl-save-urls)
|
|
(when (get-buffer quickurl-list-buffer-name)
|
|
(quickurl-list-populate-buffer))
|
|
(when (called-interactively-p 'interactive)
|
|
(message "Added %s" url))))))
|
|
|
|
;;;###autoload
|
|
(defun quickurl-browse-url (&optional lookup)
|
|
"Browse the URL associated with LOOKUP.
|
|
|
|
If not supplied LOOKUP is taken to be the word at point in the
|
|
current buffer, this default action can be modified via
|
|
`quickurl-grab-lookup-function'."
|
|
(interactive)
|
|
(when (or lookup
|
|
(setq lookup (funcall quickurl-grab-lookup-function)))
|
|
(quickurl-load-urls)
|
|
(let ((url (quickurl-find-url lookup)))
|
|
(if url
|
|
(browse-url (quickurl-url-url url))
|
|
(error "No URL associated with \"%s\"" lookup)))))
|
|
|
|
;;;###autoload
|
|
(defun quickurl-browse-url-ask (lookup)
|
|
"Browse the URL, with `completing-read' prompt, associated with LOOKUP."
|
|
(interactive (list
|
|
(progn
|
|
(quickurl-load-urls)
|
|
(completing-read "Browse: " quickurl-urls nil t))))
|
|
(let ((url (quickurl-find-url lookup)))
|
|
(when url
|
|
(browse-url (quickurl-url-url url)))))
|
|
|
|
;;;###autoload
|
|
(defun quickurl-edit-urls ()
|
|
"Pull `quickurl-url-file' into a buffer for hand editing."
|
|
(interactive)
|
|
(find-file quickurl-url-file))
|
|
|
|
;; quickurl-list mode.
|
|
|
|
;;;###autoload
|
|
(define-derived-mode quickurl-list-mode special-mode "Quickurl"
|
|
"A mode for browsing the quickurl URL list.
|
|
|
|
The key bindings for `quickurl-list-mode' are:
|
|
|
|
\\{quickurl-list-mode-map}"
|
|
(setq truncate-lines t))
|
|
|
|
;;;###autoload
|
|
(defun quickurl-list ()
|
|
"Display `quickurl-list' as a formatted list using `quickurl-list-mode'."
|
|
(interactive)
|
|
(quickurl-load-urls)
|
|
(unless (string= (buffer-name) quickurl-list-buffer-name)
|
|
(setq quickurl-list-last-buffer (current-buffer)))
|
|
(pop-to-buffer quickurl-list-buffer-name)
|
|
(quickurl-list-populate-buffer)
|
|
(quickurl-list-mode))
|
|
|
|
(defun quickurl-list-populate-buffer ()
|
|
"Populate the `quickurl-list' buffer."
|
|
(with-current-buffer quickurl-list-buffer-name
|
|
(let* ((sizes (or (cl-loop for url in quickurl-urls
|
|
collect (length (quickurl-url-description url)))
|
|
(list 20)))
|
|
(fmt (format "%%-%ds %%s\n" (apply #'max sizes)))
|
|
(inhibit-read-only t))
|
|
(erase-buffer)
|
|
(dolist (url quickurl-urls)
|
|
(let ((start (point)))
|
|
(insert (format fmt (quickurl-url-description url)
|
|
(quickurl-url-url url)))
|
|
(add-text-properties
|
|
start (1- (point))
|
|
'(mouse-face highlight help-echo "mouse-2: insert this URL"))))
|
|
(goto-char (point-min)))))
|
|
|
|
(defun quickurl-list-add-url (word url comment)
|
|
"Wrapper for `quickurl-add-url' that doesn't guess the parameters."
|
|
(interactive "sWord: \nsURL: \nsComment: ")
|
|
(quickurl-add-url word url comment))
|
|
|
|
(defun quickurl-list-quit ()
|
|
"Kill the buffer named `quickurl-list-buffer-name'."
|
|
(interactive)
|
|
(quit-window t))
|
|
|
|
(defun quickurl-list-mouse-select (event)
|
|
"Select the URL under the mouse click."
|
|
(interactive "e")
|
|
(goto-char (posn-point (event-end event)))
|
|
(quickurl-list-insert-url))
|
|
|
|
(defun quickurl-list-insert (type)
|
|
"Insert the URL under cursor into `quickurl-list-last-buffer'.
|
|
TYPE dictates what will be inserted, options are:
|
|
`url' - Insert the URL as <URL:url>
|
|
`naked-url' - Insert the URL with no formatting
|
|
`with-lookup' - Insert \"lookup <URL:url>\"
|
|
`with-desc' - Insert \"description <URL:url>\"
|
|
`lookup' - Insert the lookup for that URL"
|
|
(let ((url (nth (count-lines (point-min) (line-beginning-position))
|
|
quickurl-urls)))
|
|
(if url
|
|
(with-current-buffer quickurl-list-last-buffer
|
|
(insert
|
|
(pcase type
|
|
('url (funcall quickurl-format-function url))
|
|
('naked-url (quickurl-url-url url))
|
|
('with-lookup (format "%s <URL:%s>"
|
|
(quickurl-url-keyword url)
|
|
(quickurl-url-url url)))
|
|
('with-desc (format "%S <URL:%s>"
|
|
(quickurl-url-description url)
|
|
(quickurl-url-url url)))
|
|
('lookup (quickurl-url-keyword url)))))
|
|
(error "No URL details on that line"))
|
|
url))
|
|
|
|
(defmacro quickurl-list-make-inserter (type)
|
|
"Macro to make a key-response function for use in `quickurl-list-mode-map'."
|
|
`(defun ,(intern (format "quickurl-list-insert-%S" type)) ()
|
|
,(format "Insert the result of calling `quickurl-list-insert' with `%s'." type)
|
|
(interactive)
|
|
(when (quickurl-list-insert ',type)
|
|
(quickurl-list-quit))))
|
|
|
|
(quickurl-list-make-inserter url)
|
|
(quickurl-list-make-inserter naked-url)
|
|
(quickurl-list-make-inserter with-lookup)
|
|
(quickurl-list-make-inserter with-desc)
|
|
(quickurl-list-make-inserter lookup)
|
|
|
|
(provide 'quickurl)
|
|
|
|
;;; quickurl.el ends here
|