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;;; gmm-utils.el --- Utility functions for Gnus, Message and MML
;; Copyright (C) 2006-2019 Free Software Foundation, Inc.
;; Author: Reiner Steib <reiner.steib@gmx.de>
;; Keywords: news
;; 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 library provides self-contained utility functions. The functions are
;; used in Gnus, Message and MML, but within this library there are no
;; dependencies on Gnus, Message, or MML.
;;; Code:
(defgroup gmm nil
"Utility functions for Gnus, Message and MML."
:prefix "gmm-"
:version "22.1" ;; Gnus 5.10.9
:group 'lisp)
;; Helper functions from `gnus-utils.el': gmm-verbose, gmm-message, gmm-error
(defcustom gmm-verbose 7
"Integer that says how verbose gmm should be.
The higher the number, the more messages will flash to say what
it did. At zero, it will be totally mute; at five, it will
display most important messages; and at ten, it will keep on
jabbering all the time."
:type 'integer
:group 'gmm)
;;;###autoload
(defun gmm-regexp-concat (regexp)
"Potentially concat a list of regexps into a single one.
The concatenation is done with logical ORs."
(cond ((null regexp)
nil)
((stringp regexp)
regexp)
((listp regexp)
(mapconcat (lambda (elt) (concat "\\(" elt "\\)"))
regexp
"\\|"))))
;;;###autoload
(defun gmm-message (level &rest args)
"If LEVEL is lower than `gmm-verbose' print ARGS using `message'.
Guideline for numbers:
1 - error messages
3 - non-serious error messages
5 - messages for things that take a long time
7 - not very important messages on stuff
9 - messages inside loops."
(if (<= level gmm-verbose)
(apply 'message args)
;; We have to do this format thingy here even if the result isn't
;; shown - the return value has to be the same as the return value
;; from `message'.
(apply 'format args)))
;;;###autoload
(defun gmm-error (level &rest args)
"Beep an error if LEVEL is equal to or less than `gmm-verbose'.
ARGS are passed to `message'."
(when (<= (floor level) gmm-verbose)
(apply 'message args)
(ding)
(let (duration)
(when (and (floatp level)
(not (zerop (setq duration (* 10 (- level (floor level)))))))
(sit-for duration))))
nil)
;;;###autoload
(defun gmm-widget-p (symbol)
"Non-nil if SYMBOL is a widget."
(get symbol 'widget-type))
(autoload 'widget-create-child-value "wid-edit")
(autoload 'widget-convert "wid-edit")
(autoload 'widget-default-get "wid-edit")
;; Note: The format of `gmm-tool-bar-item' may change if some future Emacs
;; version will provide customizable tool bar buttons using a different
;; interface.
;; TODO: Extend API so that the "Command" entry can be a function or a plist.
;; In case of a list it should have the format...
;;
;; (:none command-without-modifier
;; :shift command-with-shift-pressed
;; :control command-with-ctrl-pressed
;; :control-shift command-with-control-and-shift-pressed
;; ;; mouse-2 and mouse-3 can't be used in Emacs yet.
;; :mouse-2 command-on-mouse-2-press
;; :mouse-3 command-on-mouse-3-press) ;; typically a menu of related commands
;;
;; Combinations of mouse-[23] plus shift and/or control might be overkill.
;;
;; Then use (plist-get rs-command :none), (plist-get rs-command :shift)
(define-widget 'gmm-tool-bar-item 'lazy
"Tool bar list item."
:tag "Tool bar item"
:type '(choice
(list :tag "Command and Icon"
(function :tag "Command")
(string :tag "Icon file")
(choice
(const :tag "Default map" nil)
;; Note: Usually we need non-nil attributes if map is t.
(const :tag "No menu" t)
(sexp :tag "Other map"))
(plist :inline t :tag "Properties"))
(list :tag "Separator"
(const :tag "No command" gmm-ignore)
(string :tag "Icon file")
(const :tag "No map")
(plist :inline t :tag "Properties"))))
(define-widget 'gmm-tool-bar-zap-list 'lazy
"Tool bar zap list."
:tag "Tool bar zap list"
:type '(choice (const :tag "Zap all" t)
(const :tag "Keep all" nil)
(list
;; :value
;; Work around (bug in customize?), see
;; <news:v9is48jrj1.fsf@marauder.physik.uni-ulm.de>
;; (new-file open-file dired kill-buffer write-file
;; print-buffer customize help)
(set :inline t
(const new-file)
(const open-file)
(const dired)
(const kill-buffer)
(const save-buffer)
(const write-file)
(const undo)
(const cut)
(const copy)
(const paste)
(const search-forward)
(const print-buffer)
(const customize)
(const help))
(repeat :inline t
:tag "Other"
(symbol :tag "Icon item")))))
(defcustom gmm-tool-bar-style
(if (and (boundp 'tool-bar-mode)
tool-bar-mode
(memq (display-visual-class)
(list 'static-gray 'gray-scale
'static-color 'pseudo-color)))
'gnome
'retro)
"Preferred tool bar style."
:type '(choice (const :tag "GNOME style" gnome)
(const :tag "Retro look" retro))
:group 'gmm)
(defvar tool-bar-map)
;;;###autoload
(defun gmm-tool-bar-from-list (icon-list zap-list default-map)
"Make a tool bar from ICON-LIST.
Within each entry of ICON-LIST, the first element is a menu
command, the second element is an icon file name and the third
element is a test function. You can use \\[describe-key]
<menu-entry> to find out the name of a menu command. The fourth
and all following elements are passed as the PROPS argument to the
function `tool-bar-local-item'.
If ZAP-LIST is a list, remove those item from the default
`tool-bar-map'. If it is t, start with a new sparse map. You
can use \\[describe-key] <icon> to find out the name of an icon
item. When \\[describe-key] <icon> shows \"<tool-bar> <new-file>
runs the command find-file\", then use `new-file' in ZAP-LIST.
DEFAULT-MAP specifies the default key map for ICON-LIST."
(let ((map (if (eq zap-list t)
(make-sparse-keymap)
(copy-keymap tool-bar-map))))
(when (listp zap-list)
;; Zap some items which aren't relevant for this mode and take up space.
(dolist (key zap-list)
(define-key map (vector key) nil)))
(mapc (lambda (el)
(let ((command (car el))
(icon (nth 1 el))
(fmap (or (nth 2 el) default-map))
(props (cdr (cdr (cdr el)))) )
;; command may stem from different from-maps:
(cond ((eq command 'gmm-ignore)
;; The dummy `gmm-ignore', see `gmm-tool-bar-item'
;; widget. Suppress tooltip by adding `:enable nil'.
(if (fboundp 'tool-bar-local-item)
(apply 'tool-bar-local-item icon nil nil
map :enable nil props)
;; (tool-bar-local-item ICON DEF KEY MAP &rest PROPS)
;; (tool-bar-add-item ICON DEF KEY &rest PROPS)
(apply 'tool-bar-add-item icon nil nil :enable nil props)))
((equal fmap t) ;; Not a menu command
(apply 'tool-bar-local-item
icon command
(intern icon) ;; reuse icon or fmap here?
map props))
(t ;; A menu command
(apply 'tool-bar-local-item-from-menu
;; (apply 'tool-bar-local-item icon def key
;; tool-bar-map props)
command icon map (symbol-value fmap)
props)))
t))
(if (symbolp icon-list)
(eval icon-list)
icon-list))
map))
(defmacro defun-gmm (name function arg-list &rest body)
"Create function NAME.
If FUNCTION exists, then NAME becomes an alias for FUNCTION.
Otherwise, create function NAME with ARG-LIST and BODY."
(let ((defined-p (fboundp function)))
(if defined-p
`(defalias ',name ',function)
`(defun ,name ,arg-list ,@body))))
(defun gmm-customize-mode (&optional mode)
"Customize customization group for MODE.
If mode is nil, use `major-mode' of the current buffer."
(interactive)
(customize-group
(or mode
(intern (let ((mode (symbol-name major-mode)))
(string-match "^\\(.+\\)-mode$" mode)
(match-string 1 mode))))))
(define-obsolete-function-alias 'gmm-format-time-string 'format-time-string
"26.1")
(provide 'gmm-utils)
;;; gmm-utils.el ends here
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