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mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-12-26 10:49:33 +00:00
emacs/lisp/widget.el
Stefan Kangas 2a8d083607 Drop support for the dead third-party w3 package
The w3 package was removed from GNU ELPA in 2020 as it doesn't run on
a recent Emacs, and development had stopped over a decade before that.
If anyone wants to revive the w3 package, they should look this all
over, but it doesn't make sense for us to maintain this support code.
Ref: https://debbugs.gnu.org/25395

* lisp/net/browse-url.el (browse-url-w3): Make obsolete.
(browse-url--browser-defcustom-type)
(browse-url-default-browser):
* lisp/ffap.el (ffap-url-at-point, ffap-file-at-point):
* lisp/net/newst-plainview.el (newsticker--buffer-do-insert-text):
* lisp/net/newst-reader.el (newsticker-html-renderer)
(newsticker-show-news):
* lisp/net/newst-treeview.el (newsticker--treeview-render-text):
* lisp/org/ol.el (org-store-link):
* lisp/url/url.el (url-retrieve): Remove w3 support code and related
documentation and comments.  (Bug#56435)

* test/lisp/net/browse-url-tests.el
(browse-url-tests-browser-kind): Adjust test for above changes.

* etc/TODO: Remove TODO to install W3.
* doc/misc/org.org (Handling Links): Don't mention W3.
* lisp/msb.el (msb--few-menus, msb--very-many-menus): Check for
eww-mode instead of w3-mode.
2022-07-09 17:27:49 +02:00

99 lines
3.8 KiB
EmacsLisp

;;; widget.el --- a library of user interface components -*- lexical-binding: t; -*-
;;
;; Copyright (C) 1996-1997, 2001-2022 Free Software Foundation, Inc.
;;
;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
;; Keywords: help, extensions, faces, hypermedia
;; URL: http://www.dina.kvl.dk/~abraham/custom/
;; Package: emacs
;; 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:
;;
;; The widget library is partially documented in the `widget' Info
;; file.
;;
;; This file only contains the code needed to define new widget types.
;; Everything else is autoloaded from `wid-edit.el'.
;;; Code:
;; Doing this is unnecessary in Emacs 20. Kept as dummy in case
;; external libraries call it. We save a kb or two of purespace by
;; dummying-out such definitions generally.
(defmacro define-widget-keywords (&rest _keys)
;; ;; Don't use backquote, since that makes trouble trying to
;; ;; re-bootstrap from just the .el files.
;; (list 'eval-and-compile
;; (list 'let (list (list 'keywords (list 'quote keys)))
;; (list 'while 'keywords
;; (list 'or (list 'boundp (list 'car 'keywords))
;; (list 'set (list 'car 'keywords) (list 'car 'keywords)))
;; (list 'setq 'keywords (list 'cdr 'keywords)))))
(declare (obsolete nil "27.1") (indent defun))
nil)
;;(define-widget-keywords :documentation-indent
;; :complete-function :complete :button-overlay
;; :field-overlay
;; :documentation-shown :button-prefix
;; :button-suffix :mouse-down-action :glyph-up :glyph-down :glyph-inactive
;; :prompt-internal :prompt-history :prompt-match
;; :prompt-value :deactivate :active
;; :inactive :activate :sibling-args :delete-button-args
;; :insert-button-args :append-button-args :button-args
;; :tag-glyph :off-glyph :on-glyph :valid-regexp
;; :secret :sample-face :sample-face-get :case-fold
;; :create :convert-widget :format :value-create :offset :extra-offset
;; :tag :doc :from :to :args :value :action
;; :value-set :value-delete :match :parent :delete :menu-tag-get
;; :value-get :choice :void :menu-tag :on :off :on-type :off-type
;; :notify :entry-format :button :children :buttons :insert-before
;; :delete-at :format-handler :widget :value-pos :value-to-internal
;; :indent :size :value-to-external :validate :error :directory
;; :must-match :type-error :value-inline :inline :match-inline :greedy
;; :button-face-get :button-face :value-face :keymap :entry-from
;; :entry-to :help-echo :documentation-property :tab-order)
(defun define-widget (name class doc &rest args)
"Define a new widget type named NAME from CLASS.
NAME and CLASS should both be symbols, CLASS should be one of the
existing widget types, or nil to create the widget from scratch.
After the new widget has been defined, the following two calls will
create identical widgets:
* (widget-create NAME)
* (apply #\\='widget-create CLASS ARGS)
The third argument DOC is a documentation string for the widget."
(declare (doc-string 3) (indent defun))
;;
(unless (or (null doc) (stringp doc))
(error "Widget documentation must be nil or a string"))
(put name 'widget-type (cons class args))
(put name 'widget-documentation (purecopy doc))
name)
(define-obsolete-function-alias 'widget-plist-member #'plist-member "26.1")
(provide 'widget)
;;; widget.el ends here