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;;; mastodon-widget.el --- Widget utilities -*- lexical-binding: t -*-
;; Copyright (C) 2020-2024 Marty Hiatt
;; Author: Marty Hiatt <mousebot@disroot.org>
;; Maintainer: Marty Hiatt <mousebot@disroot.org>
;; Homepage: https://codeberg.org/martianh/mastodon.el
;; This file is not part of GNU Emacs.
;; This file is part of mastodon.el.
;; mastodon.el 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.
;; mastodon.el 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 mastodon.el. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; some widget utilities for mastodon.el
;;; Code:
(require 'cl-lib)
(defvar mastodon-widget-keymap
(let ((map (make-sparse-keymap)))
(define-key map [down-mouse-2] 'widget-button-click)
(define-key map [down-mouse-1] 'widget-button-click)
(define-key map [touchscreen-begin] 'widget-button-click)
;; The following definition needs to avoid using escape sequences that
;; might get converted to ^M when building loaddefs.el
(define-key map [(control ?m)] 'widget-button-press)
map)
"Keymap containing useful binding for buffers containing widgets.
Recommended as a parent keymap for modes using widgets.
Note that such modes will need to require wid-edit.")
(defface mastodon-widget-face
'((t :inherit font-lock-function-name-face :weight bold :underline t))
"Face for widgets.")
(defun mastodon-widget--return-item-widgets (list)
"Return a list of item widgets for each item, a string, in LIST."
(cl-loop for x in list
collect `(choice-item :value ,x :format "%[%v%] "
:keymap ,mastodon-widget-keymap)))
(defun mastodon-widget--format (str &optional padding)
"Return a widget format string for STR, its name.
PADDING is an integer, for how much right-side padding to add."
(concat "%[" (propertize str
'face 'mastodon-widget-face
'mastodon-tab-stop t)
"%]: %v"
(make-string padding ? )))
(defun mastodon-widget--create (kind type value notify-fun)
"Return a widget of KIND, with TYPE elements, and default VALUE.
KIND is a string, either Listing, Sort, Items, or Inbox, and will
be used for the widget's tag.
VALUE is a string, a member of TYPE.
NOTIFY-FUN is the widget's notify function."
(let* ((val-length (length (if (symbolp value)
(symbol-name value)
value)))
(type-list (if (symbolp type)
(symbol-value type)
type))
(longest (apply #'max
(mapcar #'length
(if (symbolp (car type-list))
(mapcar #'symbol-name type-list)
type-list))))
(padding (- longest val-length)))
(if (not (member value type-list))
(user-error "%s is not a member of %s" value type-list)
(widget-create
'menu-choice
:tag kind
:value value
:args (mastodon-widget--return-item-widgets type-list)
:help-echo (format "Select a %s kind" kind)
:format (mastodon-widget--format kind padding)
:notify notify-fun
;; eg format of notify-fun:
;; (lambda (widget &rest ignore)
;; (let ((value (widget-value widget))
;; (tag (widget-get widget :tag)))
;; (notify-fun value)))
:keymap mastodon-widget-keymap))))
(provide 'mastodon-widget)
;;; mastodon-widget.el ends here
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