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720 lines
25 KiB
EmacsLisp
720 lines
25 KiB
EmacsLisp
;;; cus-theme.el -- custom theme creation user interface -*- lexical-binding: t -*-
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;;
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;; Copyright (C) 2001-2019 Free Software Foundation, Inc.
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;;
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;; Author: Alex Schroeder <alex@gnu.org>
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;; Maintainer: emacs-devel@gnu.org
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;; Keywords: help, faces
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;; Package: emacs
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Code:
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(require 'widget)
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(require 'cus-edit)
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(eval-when-compile
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(require 'wid-edit))
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(defvar custom-new-theme-mode-map
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(let ((map (make-keymap)))
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(set-keymap-parent map (make-composed-keymap widget-keymap
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special-mode-map))
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(suppress-keymap map)
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(define-key map "\C-x\C-s" 'custom-theme-write)
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(define-key map "q" 'Custom-buffer-done)
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(define-key map "n" 'widget-forward)
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(define-key map "p" 'widget-backward)
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map)
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"Keymap for `custom-new-theme-mode'.")
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(define-derived-mode custom-new-theme-mode nil "Custom-Theme"
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"Major mode for editing Custom themes.
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Do not call this mode function yourself. It is meant for internal use."
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(use-local-map custom-new-theme-mode-map)
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(custom--initialize-widget-variables)
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(setq-local revert-buffer-function #'custom-theme-revert))
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(put 'custom-new-theme-mode 'mode-class 'special)
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(defvar custom-theme-name nil)
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;; Each element has the form (VAR CHECKBOX-WIDGET VAR-WIDGET)
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(defvar custom-theme-variables nil)
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;; Each element has the form (FACE CHECKBOX-WIDGET FACE-WIDGET)
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(defvar custom-theme-faces nil)
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(defvar custom-theme-description nil)
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(defvar custom-theme--migrate-settings nil)
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(defvar custom-theme-insert-variable-marker nil)
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(defvar custom-theme-insert-face-marker nil)
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(defvar custom-theme--listed-faces '(default cursor fixed-pitch
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variable-pitch escape-glyph homoglyph
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minibuffer-prompt highlight region
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shadow secondary-selection trailing-whitespace
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font-lock-builtin-face font-lock-comment-delimiter-face
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font-lock-comment-face font-lock-constant-face
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font-lock-doc-face font-lock-function-name-face
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font-lock-keyword-face font-lock-negation-char-face
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font-lock-preprocessor-face font-lock-regexp-grouping-backslash
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font-lock-regexp-grouping-construct font-lock-string-face
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font-lock-type-face font-lock-variable-name-face
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font-lock-warning-face button link link-visited fringe
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header-line tooltip mode-line mode-line-buffer-id
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mode-line-emphasis mode-line-highlight mode-line-inactive
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isearch isearch-fail lazy-highlight match next-error
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query-replace)
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"Faces listed by default in the *Custom Theme* buffer.")
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(defvar custom-theme--save-name)
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;;;###autoload
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(defun customize-create-theme (&optional theme buffer)
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"Create or edit a custom theme.
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THEME, if non-nil, should be an existing theme to edit. If THEME
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is `user', the resulting *Custom Theme* buffer also contains a
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checkbox for removing the theme settings specified in the buffer
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from the Custom save file.
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BUFFER, if non-nil, should be a buffer to use; the default is
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named *Custom Theme*."
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(interactive)
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(switch-to-buffer (get-buffer-create (or buffer "*Custom Theme*")))
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(let ((inhibit-read-only t))
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(erase-buffer)
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(delete-all-overlays))
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(custom-new-theme-mode)
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(make-local-variable 'custom-theme-name)
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(setq-local custom-theme--save-name theme)
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(setq-local custom-theme-faces nil)
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(setq-local custom-theme-variables nil)
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(setq-local custom-theme-description "")
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(setq-local custom-theme--migrate-settings nil)
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(make-local-variable 'custom-theme-insert-face-marker)
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(make-local-variable 'custom-theme-insert-variable-marker)
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(make-local-variable 'custom-theme--listed-faces)
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(when (called-interactively-p 'interactive)
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(unless (y-or-n-p "Include basic face customizations in this theme? ")
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(setq custom-theme--listed-faces nil)))
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(if (eq theme 'user)
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(widget-insert "This buffer contains all the Custom settings you have made.
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You can convert them into a new custom theme, and optionally
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remove them from your saved Custom file.\n\n"))
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(widget-create 'push-button
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:tag " Visit Theme "
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:help-echo "Insert the settings of a pre-defined theme."
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:action (lambda (_widget &optional _event)
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(call-interactively #'custom-theme-visit-theme)))
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(widget-insert " ")
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(widget-create 'push-button
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:tag " Merge Theme "
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:help-echo "Merge in the settings of a pre-defined theme."
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:action (lambda (_widget &optional _event)
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(call-interactively #'custom-theme-merge-theme)))
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(widget-insert " ")
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(widget-create 'push-button
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:tag " Revert "
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:help-echo "Revert this buffer to its original state."
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:action (lambda (&rest ignored) (revert-buffer)))
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(widget-insert "\n\nTheme name : ")
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(setq custom-theme-name
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(widget-create 'editable-field
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:value (if (and theme (not (eq theme 'user)))
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(symbol-name theme)
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"")))
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(widget-insert "Description: ")
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(setq custom-theme-description
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(widget-create 'text
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:value (format-time-string "Created %Y-%m-%d.")))
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(widget-create 'push-button
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:notify #'custom-theme-write
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" Save Theme ")
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(when (eq theme 'user)
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(setq custom-theme--migrate-settings t)
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(widget-insert " ")
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(widget-create 'checkbox
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:value custom-theme--migrate-settings
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:action (lambda (widget &optional event)
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(when (widget-value widget)
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(widget-toggle-action widget event)
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(setq custom-theme--migrate-settings
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(widget-value widget)))))
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(widget-insert (propertize " Remove saved theme settings from Custom save file."
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'face '(variable-pitch (:height 0.9)))))
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(let (vars values faces face-specs)
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;; Load the theme settings.
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(when theme
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(unless (eq theme 'user)
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(load-theme theme nil t))
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(dolist (setting (get theme 'theme-settings))
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(if (eq (car setting) 'theme-value)
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(progn (push (nth 1 setting) vars)
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(push (nth 3 setting) values))
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(push (nth 1 setting) faces)
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(push (nth 3 setting) face-specs))))
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;; If THEME is non-nil, insert all of that theme's faces.
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;; Otherwise, insert those in `custom-theme--listed-faces'.
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(widget-insert "\n\n Theme faces:\n ")
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(if theme
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(while faces
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(custom-theme-add-face-1 (pop faces) (pop face-specs)))
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(dolist (face custom-theme--listed-faces)
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(custom-theme-add-face-1 face nil)))
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(setq custom-theme-insert-face-marker (point-marker))
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(widget-insert " ")
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(widget-create 'push-button
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:tag "Insert Additional Face"
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:help-echo "Add another face to this theme."
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:follow-link 'mouse-face
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:button-face 'custom-link
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:mouse-face 'highlight
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:pressed-face 'highlight
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:action (lambda (_widget &optional _event)
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(call-interactively #'custom-theme-add-face)))
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;; If THEME is non-nil, insert all of that theme's variables.
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(widget-insert "\n\n Theme variables:\n ")
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(if theme
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(while vars
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(if (eq (car vars) 'custom-enabled-themes)
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(progn (pop vars) (pop values))
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(custom-theme-add-var-1 (pop vars) (eval (pop values))))))
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(setq custom-theme-insert-variable-marker (point-marker))
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(widget-insert " ")
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(widget-create 'push-button
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:tag "Insert Variable"
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:help-echo "Add another variable to this theme."
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:follow-link 'mouse-face
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:button-face 'custom-link
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:mouse-face 'highlight
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:pressed-face 'highlight
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:action (lambda (_widget &optional _event)
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(call-interactively #'custom-theme-add-variable)))
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(widget-insert ?\n)
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(widget-setup)
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(goto-char (point-min))
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(message "")))
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(defun custom-theme-revert (_ignore-auto noconfirm)
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"Revert the current *Custom Theme* buffer.
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This is the `revert-buffer-function' for `custom-new-theme-mode'."
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(when (or noconfirm (y-or-n-p "Discard current changes? "))
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(customize-create-theme custom-theme--save-name (current-buffer))))
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;;; Theme variables
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(defun custom-theme-add-variable (var value)
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"Add a widget for VAR (a symbol) to the *New Custom Theme* buffer.
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VALUE should be a value to which to set the widget; when called
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interactively, this defaults to the current value of VAR."
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(interactive
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(let ((v (read-variable "Variable name: ")))
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(list v (symbol-value v))))
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(let ((entry (assq var custom-theme-variables)))
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(cond ((null entry)
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;; If VAR is not yet in the buffer, add it.
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(save-excursion
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(goto-char custom-theme-insert-variable-marker)
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(custom-theme-add-var-1 var value)
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(move-marker custom-theme-insert-variable-marker (point))
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(widget-setup)))
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;; Otherwise, alter that var widget.
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(t
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(widget-value-set (nth 1 entry) t)
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(let ((widget (nth 2 entry)))
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(widget-put widget :shown-value (list value))
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(custom-redraw widget))))))
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(defun custom-theme-add-var-1 (symbol val)
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(widget-insert " ")
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(push (list symbol
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(prog1 (widget-create 'checkbox
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:value t
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:help-echo "Enable/disable this variable.")
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(widget-insert " "))
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(widget-create 'custom-variable
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:tag (custom-unlispify-tag-name symbol)
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:value symbol
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:shown-value (list val)
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:notify #'ignore
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:custom-level 0
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:custom-state 'hidden
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:custom-style 'simple))
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custom-theme-variables)
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(widget-insert " "))
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;;; Theme faces
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(defun custom-theme-add-face (face &optional spec)
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"Add a widget for FACE (a symbol) to the *New Custom Theme* buffer.
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SPEC, if non-nil, should be a face spec to which to set the widget."
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(interactive (list (read-face-name "Face name" (face-at-point t))))
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(unless (or (facep face) spec)
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(error "`%s' has no face definition" face))
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(let ((entry (assq face custom-theme-faces)))
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(cond ((null entry)
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;; If FACE is not yet in the buffer, add it.
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(save-excursion
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(goto-char custom-theme-insert-face-marker)
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(custom-theme-add-face-1 face spec)
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(move-marker custom-theme-insert-face-marker (point))
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(widget-setup)))
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;; Otherwise, if SPEC is supplied, alter that face widget.
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(spec
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(widget-value-set (nth 1 entry) t)
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(let ((widget (nth 2 entry)))
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(widget-put widget :shown-value spec)
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(custom-redraw widget)))
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((called-interactively-p 'interactive)
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(error "`%s' is already present" face)))))
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(defun custom-theme-add-face-1 (symbol spec)
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(widget-insert " ")
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(push (list symbol
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(prog1
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(widget-create 'checkbox
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:value t
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:help-echo "Enable/disable this face.")
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(widget-insert " "))
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(widget-create 'custom-face
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:tag (custom-unlispify-tag-name symbol)
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:documentation-shown t
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:value symbol
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:custom-state 'hidden
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:custom-style 'simple
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:shown-value spec
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:sample-indent 34))
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custom-theme-faces)
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(widget-insert " "))
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;;; Reading and writing
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;;;###autoload
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(defun custom-theme-visit-theme (theme)
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"Set up a Custom buffer to edit custom theme THEME."
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(interactive
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(list
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(intern (completing-read "Find custom theme: "
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(mapcar #'symbol-name
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(custom-available-themes))))))
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(unless (custom-theme-name-valid-p theme)
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(error "No valid theme named `%s'" theme))
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(cond ((not (eq major-mode 'custom-new-theme-mode))
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(customize-create-theme theme))
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((y-or-n-p "Discard current changes? ")
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(setq custom-theme--save-name theme)
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(custom-theme-revert nil t))))
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(defun custom-theme-merge-theme (theme)
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"Merge the custom theme THEME's settings into the current buffer."
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(interactive
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(list
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(intern (completing-read "Merge custom theme: "
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(mapcar #'symbol-name
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(custom-available-themes))))))
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(unless (eq theme 'user)
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(unless (custom-theme-name-valid-p theme)
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(error "Invalid theme name `%s'" theme))
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(load-theme theme nil t))
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(let ((settings (reverse (get theme 'theme-settings))))
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(dolist (setting settings)
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(let ((option (eq (car setting) 'theme-value))
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(name (nth 1 setting))
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(value (nth 3 setting)))
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(unless (and option
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(memq name '(custom-enabled-themes
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custom-safe-themes)))
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(funcall (if option
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#'custom-theme-add-variable
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#'custom-theme-add-face)
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name value)))))
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theme)
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;; From cus-edit.el
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(defvar custom-reset-standard-faces-list)
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(defvar custom-reset-standard-variables-list)
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(defun custom-theme-write (&rest _ignore)
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"Write the current custom theme to its theme file."
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(interactive)
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(let* ((name (widget-value custom-theme-name))
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(doc (widget-value custom-theme-description))
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(vars custom-theme-variables)
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(faces custom-theme-faces)
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filename)
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(when (string-equal name "")
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(setq name (read-from-minibuffer "Theme name: " (user-login-name)))
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(widget-value-set custom-theme-name name))
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(unless (custom-theme-name-valid-p (intern name))
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(error "Custom themes cannot be named `%s'" name))
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(setq filename (expand-file-name (concat name "-theme.el")
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custom-theme-directory))
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(and (file-exists-p filename)
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(not (y-or-n-p (format "File %s exists. Overwrite? " filename)))
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(error "Aborted"))
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(with-temp-buffer
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(emacs-lisp-mode)
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(unless (file-directory-p custom-theme-directory)
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(make-directory (file-name-as-directory custom-theme-directory) t))
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(setq buffer-file-name filename)
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(erase-buffer)
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(insert "(deftheme " name)
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(if doc (insert "\n \"" doc "\""))
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(insert ")\n")
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(custom-theme-write-variables name (reverse vars))
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(custom-theme-write-faces name (reverse faces))
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(insert "\n(provide-theme '" name ")\n")
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(save-buffer))
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(message "Theme written to %s" filename)
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(when custom-theme--migrate-settings
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;; Remove these settings from the Custom file.
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(let ((custom-reset-standard-variables-list '(t))
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(custom-reset-standard-faces-list '(t)))
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(dolist (var vars)
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(when (and (not (eq (car var) 'custom-enabled-themes))
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(widget-get (nth 1 var) :value))
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(widget-apply (nth 2 var) :custom-mark-to-reset-standard)))
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(dolist (face faces)
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(when (widget-get (nth 1 face) :value)
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(widget-apply (nth 2 face) :custom-mark-to-reset-standard)))
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(custom-save-all))
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(let ((custom-theme-load-path (list 'custom-theme-directory)))
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(load-theme (intern name))))))
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(defun custom-theme-write-variables (theme vars)
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"Write a `custom-theme-set-variables' command for THEME.
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It includes all variables in list VARS."
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(when vars
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(let ((standard-output (current-buffer)))
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(princ "\n(custom-theme-set-variables\n")
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(princ " '")
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(princ theme)
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(princ "\n")
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(dolist (spec vars)
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(when (widget-get (nth 1 spec) :value)
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(let* ((symbol (nth 0 spec))
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(widget (nth 2 spec))
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(child (car-safe (widget-get widget :children)))
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(value (if child
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(widget-value child)
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;; Child is null if the widget is closed (hidden).
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(car (widget-get widget :shown-value)))))
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(when (boundp symbol)
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(unless (bolp)
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(princ "\n"))
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(princ " '(")
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(prin1 symbol)
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(princ " ")
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(prin1 (custom-quote value))
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(princ ")")))))
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(if (bolp)
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(princ " "))
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(princ ")")
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(when (/= (following-char) ?\n)
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(princ "\n")))))
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(defun custom-theme-write-faces (theme faces)
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"Write a `custom-theme-set-faces' command for THEME.
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It includes all faces in list FACES."
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(when faces
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(let ((standard-output (current-buffer)))
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(princ "\n(custom-theme-set-faces\n")
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(princ " '")
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(princ theme)
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(princ "\n")
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(dolist (spec faces)
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;; Insert the face iff the checkbox widget is checked.
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(when (widget-get (nth 1 spec) :value)
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(let* ((symbol (nth 0 spec))
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(widget (nth 2 spec))
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(value
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(cond
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((car-safe (widget-get widget :children))
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(custom-face-widget-to-spec widget))
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;; Child is null if the widget is closed (hidden).
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((widget-get widget :shown-value))
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(t (custom-face-get-current-spec symbol)))))
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(when (and (facep symbol) value)
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(princ (if (bolp) " '(" "\n '("))
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(prin1 symbol)
|
||
(princ " ")
|
||
(prin1 value)
|
||
(princ ")")))))
|
||
(if (bolp) (princ " "))
|
||
(princ ")")
|
||
(when (/= (following-char) ?\n)
|
||
(princ "\n")))))
|
||
|
||
|
||
;;; Describing Custom themes.
|
||
|
||
;;;###autoload
|
||
(defun describe-theme (theme)
|
||
"Display a description of the Custom theme THEME (a symbol)."
|
||
(interactive
|
||
(list
|
||
(intern (completing-read "Describe custom theme: "
|
||
(mapcar #'symbol-name
|
||
(custom-available-themes))))))
|
||
(unless (custom-theme-name-valid-p theme)
|
||
(error "Invalid theme name `%s'" theme))
|
||
(help-setup-xref (list 'describe-theme theme)
|
||
(called-interactively-p 'interactive))
|
||
(with-help-window (help-buffer)
|
||
(with-current-buffer standard-output
|
||
(describe-theme-1 theme))))
|
||
|
||
(defun describe-theme-1 (theme)
|
||
(prin1 theme)
|
||
(princ " is a custom theme")
|
||
(let ((fn (locate-file (concat (symbol-name theme) "-theme.el")
|
||
(custom-theme--load-path)
|
||
'("" "c")))
|
||
doc)
|
||
(when fn
|
||
(princ (substitute-command-keys " in `"))
|
||
(help-insert-xref-button (file-name-nondirectory fn)
|
||
'help-theme-def fn)
|
||
(princ (substitute-command-keys "'")))
|
||
(princ ".\n")
|
||
(if (custom-theme-p theme)
|
||
(progn
|
||
(if (custom-theme-enabled-p theme)
|
||
(princ "It is loaded and enabled.")
|
||
(princ "It is loaded but disabled."))
|
||
(setq doc (get theme 'theme-documentation)))
|
||
(princ "It is not loaded.")
|
||
;; Attempt to grab the theme documentation
|
||
(when fn
|
||
(with-temp-buffer
|
||
(insert-file-contents fn)
|
||
(let ((sexp (let ((read-circle nil))
|
||
(condition-case nil
|
||
(read (current-buffer))
|
||
(end-of-file nil)))))
|
||
(and (eq (car-safe sexp) 'deftheme)
|
||
(setq doc (nth 2 sexp)))))))
|
||
(princ "\n\nDocumentation:\n")
|
||
(princ (if (stringp doc)
|
||
(substitute-command-keys doc)
|
||
"No documentation available.")))
|
||
(princ "\n\nYou can ")
|
||
(help-insert-xref-button "customize" 'help-theme-edit theme)
|
||
(princ " this theme."))
|
||
|
||
|
||
;;; Theme chooser
|
||
|
||
(defvar custom--listed-themes)
|
||
|
||
(defcustom custom-theme-allow-multiple-selections nil
|
||
"Whether to allow multi-selections in the *Custom Themes* buffer."
|
||
:version "24.1"
|
||
:type 'boolean
|
||
:group 'custom-buffer)
|
||
|
||
(defvar custom-theme-choose-mode-map
|
||
(let ((map (make-keymap)))
|
||
(set-keymap-parent map (make-composed-keymap widget-keymap
|
||
special-mode-map))
|
||
(suppress-keymap map)
|
||
(define-key map "\C-x\C-s" 'custom-theme-save)
|
||
(define-key map "n" 'widget-forward)
|
||
(define-key map "p" 'widget-backward)
|
||
(define-key map "?" 'custom-describe-theme)
|
||
map)
|
||
"Keymap for `custom-theme-choose-mode'.")
|
||
|
||
(define-derived-mode custom-theme-choose-mode special-mode "Themes"
|
||
"Major mode for selecting Custom themes.
|
||
Do not call this mode function yourself. It is meant for internal use."
|
||
(use-local-map custom-theme-choose-mode-map)
|
||
(custom--initialize-widget-variables)
|
||
(setq-local revert-buffer-function
|
||
(lambda (_ignore-auto noconfirm)
|
||
(when (or noconfirm (y-or-n-p "Discard current choices? "))
|
||
(customize-themes (current-buffer))))))
|
||
(put 'custom-theme-choose-mode 'mode-class 'special)
|
||
|
||
;;;###autoload
|
||
(defun customize-themes (&optional buffer)
|
||
"Display a selectable list of Custom themes.
|
||
When called from Lisp, BUFFER should be the buffer to use; if
|
||
omitted, a buffer named *Custom Themes* is used."
|
||
(interactive)
|
||
(switch-to-buffer (get-buffer-create (or buffer "*Custom Themes*")))
|
||
(let ((inhibit-read-only t))
|
||
(erase-buffer))
|
||
(custom-theme-choose-mode)
|
||
(setq-local custom--listed-themes nil)
|
||
(make-local-variable 'custom-theme-allow-multiple-selections)
|
||
(and (null custom-theme-allow-multiple-selections)
|
||
(> (length custom-enabled-themes) 1)
|
||
(setq custom-theme-allow-multiple-selections t))
|
||
|
||
(widget-insert
|
||
(substitute-command-keys
|
||
"Type RET or click to enable/disable listed custom themes.
|
||
Type \\[custom-describe-theme] to describe the theme at point.
|
||
Theme files are named *-theme.el in `"))
|
||
(widget-create 'link :value "custom-theme-load-path"
|
||
:button-face 'custom-link
|
||
:mouse-face 'highlight
|
||
:pressed-face 'highlight
|
||
:help-echo "Describe `custom-theme-load-path'."
|
||
:keymap custom-mode-link-map
|
||
:follow-link 'mouse-face
|
||
:action (lambda (_widget &rest _ignore)
|
||
(describe-variable 'custom-theme-load-path)))
|
||
(widget-insert (substitute-command-keys "'.\n\n"))
|
||
|
||
;; If the user has made customizations, display a warning and
|
||
;; provide buttons to disable or convert them.
|
||
(let ((user-settings (get 'user 'theme-settings)))
|
||
(unless (or (null user-settings)
|
||
(and (null (cdr user-settings))
|
||
(eq (caar user-settings) 'theme-value)
|
||
(eq (cadr (car user-settings)) 'custom-enabled-themes)))
|
||
(widget-insert
|
||
(propertize
|
||
" Note: Your custom settings take precedence over theme settings.
|
||
To migrate your settings into a theme, click "
|
||
'face 'font-lock-warning-face))
|
||
(widget-create 'link :value "here"
|
||
:button-face 'custom-link
|
||
:mouse-face 'highlight
|
||
:pressed-face 'highlight
|
||
:help-echo "Migrate."
|
||
:keymap custom-mode-link-map
|
||
:follow-link 'mouse-face
|
||
:action (lambda (_widget &rest _ignore)
|
||
(customize-create-theme 'user)))
|
||
(widget-insert ".\n\n")))
|
||
|
||
(widget-create 'push-button
|
||
:tag " Save Theme Settings "
|
||
:help-echo "Save the selected themes for future sessions."
|
||
:action #'custom-theme-save)
|
||
(widget-insert ?\n)
|
||
(widget-create 'checkbox
|
||
:value custom-theme-allow-multiple-selections
|
||
:action #'custom-theme-selections-toggle)
|
||
(widget-insert (propertize " Select more than one theme at a time"
|
||
'face '(variable-pitch (:height 0.9))))
|
||
|
||
(widget-insert "\n\nAvailable Custom Themes:\n")
|
||
(let ((help-echo "mouse-2: Enable this theme for this session")
|
||
widget)
|
||
(dolist (theme (custom-available-themes))
|
||
(setq widget (widget-create 'checkbox
|
||
:value (custom-theme-enabled-p theme)
|
||
:theme-name theme
|
||
:help-echo help-echo
|
||
:action #'custom-theme-checkbox-toggle))
|
||
(push (cons theme widget) custom--listed-themes)
|
||
(widget-create-child-and-convert widget 'push-button
|
||
:button-face-get 'ignore
|
||
:mouse-face-get 'ignore
|
||
:value (format " %s" theme)
|
||
:action #'widget-parent-action
|
||
:help-echo help-echo)
|
||
(widget-insert " -- "
|
||
(propertize (custom-theme-summary theme)
|
||
'face 'shadow)
|
||
?\n)))
|
||
(goto-char (point-min))
|
||
(widget-setup))
|
||
|
||
(defun custom-theme-summary (theme)
|
||
"Return the summary line of THEME."
|
||
(let (doc)
|
||
(if (custom-theme-p theme)
|
||
(setq doc (get theme 'theme-documentation))
|
||
(let ((fn (locate-file (concat (symbol-name theme) "-theme.el")
|
||
(custom-theme--load-path)
|
||
'("" "c"))))
|
||
(when fn
|
||
(with-temp-buffer
|
||
(insert-file-contents fn)
|
||
(let ((sexp (let ((read-circle nil))
|
||
(condition-case nil
|
||
(read (current-buffer))
|
||
(end-of-file nil)))))
|
||
(and (eq (car-safe sexp) 'deftheme)
|
||
(setq doc (nth 2 sexp))))))))
|
||
(cond ((null doc)
|
||
"(no documentation available)")
|
||
((string-match ".*" doc)
|
||
(match-string 0 doc))
|
||
(t doc))))
|
||
|
||
(defun custom-theme-checkbox-toggle (widget &optional event)
|
||
(let ((this-theme (widget-get widget :theme-name)))
|
||
(if (widget-value widget)
|
||
;; Disable the theme.
|
||
(progn
|
||
(disable-theme this-theme)
|
||
(widget-toggle-action widget event))
|
||
;; Enable the theme.
|
||
(unless custom-theme-allow-multiple-selections
|
||
;; If only one theme is allowed, disable all other themes and
|
||
;; uncheck their boxes.
|
||
(dolist (theme custom-enabled-themes)
|
||
(and (not (eq theme this-theme))
|
||
(assq theme custom--listed-themes)
|
||
(disable-theme theme)))
|
||
(dolist (theme custom--listed-themes)
|
||
(unless (eq (car theme) this-theme)
|
||
(widget-value-set (cdr theme) nil)
|
||
(widget-apply (cdr theme) :notify (cdr theme) event))))
|
||
(when (load-theme this-theme)
|
||
(widget-toggle-action widget event)))
|
||
;; Mark `custom-enabled-themes' as "set for current session".
|
||
(put 'custom-enabled-themes 'customized-value
|
||
(list (custom-quote custom-enabled-themes)))))
|
||
|
||
(defun custom-describe-theme ()
|
||
"Describe the Custom theme on the current line."
|
||
(interactive)
|
||
(let ((widget (widget-at (line-beginning-position))))
|
||
(and widget
|
||
(describe-theme (widget-get widget :theme-name)))))
|
||
|
||
(defun custom-theme-save (&rest _ignore)
|
||
(interactive)
|
||
(customize-save-variable 'custom-enabled-themes custom-enabled-themes)
|
||
(message "Custom themes saved for future sessions."))
|
||
|
||
(defun custom-theme-selections-toggle (widget &optional event)
|
||
(when (widget-value widget)
|
||
;; Deactivate multiple-selections.
|
||
(if (< 1 (length (delq nil (mapcar (lambda (x) (widget-value (cdr x)))
|
||
custom--listed-themes))))
|
||
(error "More than one theme is currently selected")))
|
||
(widget-toggle-action widget event)
|
||
(setq custom-theme-allow-multiple-selections (widget-value widget)))
|
||
|
||
(provide 'cus-theme)
|
||
|
||
;;; cus-theme.el ends here
|