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:type keywords.
539 lines
20 KiB
EmacsLisp
539 lines
20 KiB
EmacsLisp
;;; easy-mmode.el --- easy definition for major and minor modes
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;; Copyright (C) 1997, 2000, 2001, 2002, 2003, 2004, 2005
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;; Free Software Foundation, Inc.
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;; Author: Georges Brun-Cottan <Georges.Brun-Cottan@inria.fr>
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;; Maintainer: Stefan Monnier <monnier@gnu.org>
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;; Keywords: extensions lisp
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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 2, or (at your option)
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;; 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; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;; Minor modes are useful and common. This package makes defining a
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;; minor mode easy, by focusing on the writing of the minor mode
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;; functionalities themselves. Moreover, this package enforces a
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;; conventional naming of user interface primitives, making things
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;; natural for the minor-mode end-users.
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;; For each mode, easy-mmode defines the following:
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;; <mode> : The minor mode predicate. A buffer-local variable.
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;; <mode>-map : The keymap possibly associated to <mode>.
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;; see `define-minor-mode' documentation
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;;
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;; eval
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;; (pp (macroexpand '(define-minor-mode <your-mode> <doc>)))
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;; to check the result before using it.
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;; The order in which minor modes are installed is important. Keymap
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;; lookup proceeds down minor-mode-map-alist, and the order there
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;; tends to be the reverse of the order in which the modes were
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;; installed. Perhaps there should be a feature to let you specify
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;; orderings.
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;; Additionally to `define-minor-mode', the package provides convenient
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;; ways to define keymaps, and other helper functions for major and minor modes.
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;;; Code:
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(eval-when-compile (require 'cl))
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(defun easy-mmode-pretty-mode-name (mode &optional lighter)
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"Turn the symbol MODE into a string intended for the user.
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If provided, LIGHTER will be used to help choose capitalization by,
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replacing its case-insensitive matches with the literal string in LIGHTER."
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(let* ((case-fold-search t)
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;; Produce "Foo-Bar minor mode" from foo-bar-minor-mode.
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(name (concat (replace-regexp-in-string
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;; If the original mode name included "-minor" (some
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;; of them don't, e.g. auto-revert-mode), then
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;; replace it with " minor".
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"-Minor" " minor"
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;; "foo-bar-minor" -> "Foo-Bar-Minor"
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(capitalize (replace-regexp-in-string
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;; "foo-bar-minor-mode" -> "foo-bar-minor"
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"-mode\\'" "" (symbol-name mode))))
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" mode")))
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(if (not (stringp lighter)) name
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;; Strip leading and trailing whitespace from LIGHTER.
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(setq lighter (replace-regexp-in-string "\\`\\s-+\\|\\s-+\\'" ""
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lighter))
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;; Replace any (case-insensitive) matches for LIGHTER in NAME
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;; with a literal LIGHTER. E.g., if NAME is "Iimage mode" and
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;; LIGHTER is " iImag", then this will produce "iImage mode".
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;; (LIGHTER normally comes from the mode-line string passed to
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;; define-minor-mode, and normally includes at least one leading
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;; space.)
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(replace-regexp-in-string (regexp-quote lighter) lighter name t t))))
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;;;###autoload
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(defalias 'easy-mmode-define-minor-mode 'define-minor-mode)
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;;;###autoload
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(defmacro define-minor-mode (mode doc &optional init-value lighter keymap &rest body)
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"Define a new minor mode MODE.
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This function defines the associated control variable MODE, keymap MODE-map,
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and toggle command MODE.
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DOC is the documentation for the mode toggle command.
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Optional INIT-VALUE is the initial value of the mode's variable.
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Optional LIGHTER is displayed in the modeline when the mode is on.
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Optional KEYMAP is the default (defvar) keymap bound to the mode keymap.
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If it is a list, it is passed to `easy-mmode-define-keymap'
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in order to build a valid keymap. It's generally better to use
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a separate MODE-map variable than to use this argument.
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The above three arguments can be skipped if keyword arguments are
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used (see below).
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BODY contains code that will be executed each time the mode is (dis)activated.
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It will be executed after any toggling but before running the hook variable
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`mode-HOOK'.
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Before the actual body code, you can write keyword arguments (alternating
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keywords and values). These following keyword arguments are supported (other
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keywords will be passed to `defcustom' if the minor mode is global):
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:group GROUP Custom group name to use in all generated `defcustom' forms.
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Defaults to MODE without the possible trailing \"-mode\".
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Don't use this default group name unless you have written a
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`defgroup' to define that group properly.
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:global GLOBAL If non-nil specifies that the minor mode is not meant to be
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buffer-local, so don't make the variable MODE buffer-local.
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By default, the mode is buffer-local.
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:init-value VAL Same as the INIT-VALUE argument.
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:lighter SPEC Same as the LIGHTER argument.
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:keymap MAP Same as the KEYMAP argument.
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:require SYM Same as in `defcustom'.
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For example, you could write
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(define-minor-mode foo-mode \"If enabled, foo on you!\"
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:lighter \" Foo\" :require 'foo :global t :group 'hassle :version \"27.5\"
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...BODY CODE...)"
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(declare (debug (&define name stringp
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[&optional [¬ keywordp] sexp
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&optional [¬ keywordp] sexp
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&optional [¬ keywordp] sexp]
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[&rest [keywordp sexp]]
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def-body)))
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;; Allow skipping the first three args.
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(cond
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((keywordp init-value)
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(setq body (list* init-value lighter keymap body)
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init-value nil lighter nil keymap nil))
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((keywordp lighter)
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(setq body (list* lighter keymap body) lighter nil keymap nil))
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((keywordp keymap) (push keymap body) (setq keymap nil)))
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(let* ((mode-name (symbol-name mode))
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(pretty-name (easy-mmode-pretty-mode-name mode lighter))
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(globalp nil)
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(set nil)
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(initialize nil)
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(group nil)
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(type nil)
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(extra-args nil)
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(extra-keywords nil)
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(require t)
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(hook (intern (concat mode-name "-hook")))
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(hook-on (intern (concat mode-name "-on-hook")))
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(hook-off (intern (concat mode-name "-off-hook")))
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keyw keymap-sym)
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;; Check keys.
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(while (keywordp (setq keyw (car body)))
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(setq body (cdr body))
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(case keyw
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(:init-value (setq init-value (pop body)))
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(:lighter (setq lighter (pop body)))
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(:global (setq globalp (pop body)))
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(:extra-args (setq extra-args (pop body)))
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(:set (setq set (list :set (pop body))))
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(:initialize (setq initialize (list :initialize (pop body))))
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(:group (setq group (nconc group (list :group (pop body)))))
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(:type (setq type (list :type (pop body))))
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(:require (setq require (pop body)))
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(:keymap (setq keymap (pop body)))
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(t (push keyw extra-keywords) (push (pop body) extra-keywords))))
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(setq keymap-sym (if (and keymap (symbolp keymap)) keymap
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(intern (concat mode-name "-map"))))
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(unless set (setq set '(:set 'custom-set-minor-mode)))
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(unless initialize
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(setq initialize '(:initialize 'custom-initialize-default)))
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(unless group
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;; We might as well provide a best-guess default group.
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(setq group
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`(:group ',(intern (replace-regexp-in-string
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"-mode\\'" "" mode-name)))))
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(unless type (setq type '(:type 'boolean)))
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`(progn
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;; Define the variable to enable or disable the mode.
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,(if (not globalp)
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`(progn
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(defvar ,mode ,init-value ,(format "Non-nil if %s is enabled.
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Use the command `%s' to change this variable." pretty-name mode))
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(make-variable-buffer-local ',mode))
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(let ((curfile (or (and (boundp 'byte-compile-current-file)
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byte-compile-current-file)
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load-file-name))
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base-doc-string)
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(setq base-doc-string "Non-nil if %s is enabled.
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See the command `%s' for a description of this minor-mode.
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Setting this variable directly does not take effect;
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use either \\[customize] or the function `%s'.")
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(if (null body)
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(setq base-doc-string "Non-nil if %s is enabled.
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See the command `%s' for a description of this minor-mode."))
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`(defcustom ,mode ,init-value
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,(format base-doc-string pretty-name mode mode)
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,@set
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,@initialize
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,@group
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,@type
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,@(cond
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((not (and curfile require)) nil)
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((not (eq require t)) `(:require ,require)))
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,@(nreverse extra-keywords))))
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;; The actual function.
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(defun ,mode (&optional arg ,@extra-args)
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,(or doc
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(format (concat "Toggle %s on or off.
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Interactively, with no prefix argument, toggle the mode.
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With universal prefix ARG turn mode on.
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With zero or negative ARG turn mode off.
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\\{%s}") pretty-name keymap-sym))
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;; Use `toggle' rather than (if ,mode 0 1) so that using
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;; repeat-command still does the toggling correctly.
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(interactive (list (or current-prefix-arg 'toggle)))
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(setq ,mode
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(cond
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((eq arg 'toggle) (not ,mode))
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(arg (> (prefix-numeric-value arg) 0))
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(t
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(if (null ,mode) t
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(message
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"Toggling %s off; better pass an explicit argument."
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',mode)
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nil))))
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,@body
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;; The on/off hooks are here for backward compatibility only.
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(run-hooks ',hook (if ,mode ',hook-on ',hook-off))
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(if (called-interactively-p)
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(progn
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,(if globalp `(customize-mark-as-set ',mode))
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(unless (current-message)
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(message ,(format "%s %%sabled" pretty-name)
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(if ,mode "en" "dis")))))
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(force-mode-line-update)
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;; Return the new setting.
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,mode)
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;; Autoloading a define-minor-mode autoloads everything
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;; up-to-here.
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:autoload-end
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;; Define the minor-mode keymap.
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,(unless (symbolp keymap) ;nil is also a symbol.
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`(defvar ,keymap-sym
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(let ((m ,keymap))
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(cond ((keymapp m) m)
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((listp m) (easy-mmode-define-keymap m))
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(t (error "Invalid keymap %S" ,keymap))))
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,(format "Keymap for `%s'." mode-name)))
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(add-minor-mode ',mode ',lighter
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,(if keymap keymap-sym
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`(if (boundp ',keymap-sym)
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(symbol-value ',keymap-sym))))
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;; If the mode is global, call the function according to the default.
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,(if globalp
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`(if (and load-file-name (not (equal ,init-value ,mode)))
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(eval-after-load load-file-name '(,mode (if ,mode 1 -1))))))))
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;;;
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;;; make global minor mode
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;;;
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;;;###autoload
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(defalias 'easy-mmode-define-global-mode 'define-global-minor-mode)
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;;;###autoload
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(defmacro define-global-minor-mode (global-mode mode turn-on &rest keys)
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"Make GLOBAL-MODE out of the buffer-local minor MODE.
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TURN-ON is a function that will be called with no args in every buffer
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and that should try to turn MODE on if applicable for that buffer.
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KEYS is a list of CL-style keyword arguments:
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:group to specify the custom group.
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If MODE's set-up depends on the major mode in effect when it was
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enabled, then disabling and reenabling MODE should make MODE work
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correctly with the current major mode. This is important to
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prevent problems with derived modes, that is, major modes that
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call another major mode in their body."
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(let* ((global-mode-name (symbol-name global-mode))
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(pretty-name (easy-mmode-pretty-mode-name mode))
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(pretty-global-name (easy-mmode-pretty-mode-name global-mode))
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(group nil)
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(extra-args nil)
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(MODE-buffers (intern (concat global-mode-name "-buffers")))
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(MODE-enable-in-buffers
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(intern (concat global-mode-name "-enable-in-buffers")))
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(MODE-check-buffers
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(intern (concat global-mode-name "-check-buffers")))
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(MODE-cmhh (intern (concat global-mode-name "-cmhh")))
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(MODE-major-mode (intern (concat (symbol-name mode) "-major-mode"))))
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;; Check keys.
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(while (keywordp (car keys))
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(case (pop keys)
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(:extra-args (setq extra-args (pop keys)))
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(:group (setq group (nconc group (list :group (pop keys)))))
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(t (setq keys (cdr keys)))))
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(unless group
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;; We might as well provide a best-guess default group.
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(setq group
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`(:group ',(intern (replace-regexp-in-string
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"-mode\\'" "" (symbol-name mode))))))
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`(progn
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(defvar ,MODE-major-mode nil)
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(make-variable-buffer-local ',MODE-major-mode)
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;; The actual global minor-mode
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(define-minor-mode ,global-mode
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,(format "Toggle %s in every buffer.
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With prefix ARG, turn %s on if and only if ARG is positive.
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%s is actually not turned on in every buffer but only in those
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in which `%s' turns it on."
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pretty-name pretty-global-name pretty-name turn-on)
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:global t :extra-args ,extra-args ,@group
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;; Setup hook to handle future mode changes and new buffers.
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(if ,global-mode
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(progn
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(add-hook 'after-change-major-mode-hook
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',MODE-enable-in-buffers)
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(add-hook 'find-file-hook ',MODE-check-buffers)
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(add-hook 'change-major-mode-hook ',MODE-cmhh))
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(remove-hook 'after-change-major-mode-hook ',MODE-enable-in-buffers)
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(remove-hook 'find-file-hook ',MODE-check-buffers)
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(remove-hook 'change-major-mode-hook ',MODE-cmhh))
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;; Go through existing buffers.
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(dolist (buf (buffer-list))
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(with-current-buffer buf
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(if ,global-mode (,turn-on) (when ,mode (,mode -1))))))
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;; Autoloading define-global-minor-mode autoloads everything
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;; up-to-here.
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:autoload-end
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;; List of buffers left to process.
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(defvar ,MODE-buffers nil)
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;; The function that calls TURN-ON in each buffer.
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(defun ,MODE-enable-in-buffers ()
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(dolist (buf ,MODE-buffers)
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(when (buffer-live-p buf)
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(with-current-buffer buf
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(if ,mode
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(unless (eq ,MODE-major-mode major-mode)
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(,mode -1)
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(,turn-on)
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(setq ,MODE-major-mode major-mode))
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(,turn-on)
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(setq ,MODE-major-mode major-mode))))))
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(put ',MODE-enable-in-buffers 'definition-name ',global-mode)
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(defun ,MODE-check-buffers ()
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(,MODE-enable-in-buffers)
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(setq ,MODE-buffers nil)
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(remove-hook 'post-command-hook ',MODE-check-buffers))
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(put ',MODE-check-buffers 'definition-name ',global-mode)
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;; The function that catches kill-all-local-variables.
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(defun ,MODE-cmhh ()
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(add-to-list ',MODE-buffers (current-buffer))
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(add-hook 'post-command-hook ',MODE-check-buffers))
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(put ',MODE-cmhh 'definition-name ',global-mode))))
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;;;
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;;; easy-mmode-defmap
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;;;
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(if (fboundp 'set-keymap-parents)
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(defalias 'easy-mmode-set-keymap-parents 'set-keymap-parents)
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(defun easy-mmode-set-keymap-parents (m parents)
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(set-keymap-parent
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m
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(cond
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((not (consp parents)) parents)
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((not (cdr parents)) (car parents))
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(t (let ((m (copy-keymap (pop parents))))
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(easy-mmode-set-keymap-parents m parents)
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m))))))
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;;;###autoload
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(defun easy-mmode-define-keymap (bs &optional name m args)
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"Return a keymap built from bindings BS.
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BS must be a list of (KEY . BINDING) where
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KEY and BINDINGS are suitable for `define-key'.
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Optional NAME is passed to `make-sparse-keymap'.
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Optional map M can be used to modify an existing map.
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ARGS is a list of additional keyword arguments."
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(let (inherit dense)
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(while args
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(let ((key (pop args))
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(val (pop args)))
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(case key
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(:name (setq name val))
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(:dense (setq dense val))
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(:inherit (setq inherit val))
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(:group)
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(t (message "Unknown argument %s in defmap" key)))))
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(unless (keymapp m)
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(setq bs (append m bs))
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(setq m (if dense (make-keymap name) (make-sparse-keymap name))))
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(dolist (b bs)
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(let ((keys (car b))
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(binding (cdr b)))
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(dolist (key (if (consp keys) keys (list keys)))
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(cond
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((symbolp key)
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(substitute-key-definition key binding m global-map))
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((null binding)
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(unless (keymapp (lookup-key m key)) (define-key m key binding)))
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((let ((o (lookup-key m key)))
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(or (null o) (numberp o) (eq o 'undefined)))
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(define-key m key binding))))))
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(cond
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((keymapp inherit) (set-keymap-parent m inherit))
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((consp inherit) (easy-mmode-set-keymap-parents m inherit)))
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m))
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;;;###autoload
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(defmacro easy-mmode-defmap (m bs doc &rest args)
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`(defconst ,m
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(easy-mmode-define-keymap ,bs nil (if (boundp ',m) ,m) ,(cons 'list args))
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,doc))
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;;;
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;;; easy-mmode-defsyntax
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;;;
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(defun easy-mmode-define-syntax (css args)
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(let ((st (make-syntax-table (plist-get args :copy)))
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(parent (plist-get args :inherit)))
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(dolist (cs css)
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(let ((char (car cs))
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||
(syntax (cdr cs)))
|
||
(if (sequencep char)
|
||
(mapcar (lambda (c) (modify-syntax-entry c syntax st)) char)
|
||
(modify-syntax-entry char syntax st))))
|
||
(if parent (set-char-table-parent
|
||
st (if (symbolp parent) (symbol-value parent) parent)))
|
||
st))
|
||
|
||
;;;###autoload
|
||
(defmacro easy-mmode-defsyntax (st css doc &rest args)
|
||
"Define variable ST as a syntax-table.
|
||
CSS contains a list of syntax specifications of the form (CHAR . SYNTAX)."
|
||
`(progn
|
||
(autoload 'easy-mmode-define-syntax "easy-mmode")
|
||
(defconst ,st (easy-mmode-define-syntax ,css ,(cons 'list args)) ,doc)))
|
||
|
||
|
||
|
||
;;;
|
||
;;; easy-mmode-define-navigation
|
||
;;;
|
||
|
||
(defmacro easy-mmode-define-navigation (base re &optional name endfun narrowfun)
|
||
"Define BASE-next and BASE-prev to navigate in the buffer.
|
||
RE determines the places the commands should move point to.
|
||
NAME should describe the entities matched by RE. It is used to build
|
||
the docstrings of the two functions.
|
||
BASE-next also tries to make sure that the whole entry is visible by
|
||
searching for its end (by calling ENDFUN if provided or by looking for
|
||
the next entry) and recentering if necessary.
|
||
ENDFUN should return the end position (with or without moving point).
|
||
NARROWFUN non-nil means to check for narrowing before moving, and if
|
||
found, do widen first and then call NARROWFUN with no args after moving."
|
||
(let* ((base-name (symbol-name base))
|
||
(prev-sym (intern (concat base-name "-prev")))
|
||
(next-sym (intern (concat base-name "-next")))
|
||
(check-narrow-maybe
|
||
(when narrowfun
|
||
'(setq was-narrowed
|
||
(prog1 (or (< (- (point-max) (point-min)) (buffer-size)))
|
||
(widen)))))
|
||
(re-narrow-maybe (when narrowfun
|
||
`(when was-narrowed (,narrowfun)))))
|
||
(unless name (setq name base-name))
|
||
`(progn
|
||
(add-to-list 'debug-ignored-errors
|
||
,(concat "^No \\(previous\\|next\\) " (regexp-quote name)))
|
||
(defun ,next-sym (&optional count)
|
||
,(format "Go to the next COUNT'th %s." name)
|
||
(interactive)
|
||
(unless count (setq count 1))
|
||
(if (< count 0) (,prev-sym (- count))
|
||
(if (looking-at ,re) (setq count (1+ count)))
|
||
(let (was-narrowed)
|
||
,check-narrow-maybe
|
||
(if (not (re-search-forward ,re nil t count))
|
||
(if (looking-at ,re)
|
||
(goto-char (or ,(if endfun `(,endfun)) (point-max)))
|
||
(error "No next %s" ,name))
|
||
(goto-char (match-beginning 0))
|
||
(when (and (eq (current-buffer) (window-buffer (selected-window)))
|
||
(interactive-p))
|
||
(let ((endpt (or (save-excursion
|
||
,(if endfun `(,endfun)
|
||
`(re-search-forward ,re nil t 2)))
|
||
(point-max))))
|
||
(unless (pos-visible-in-window-p endpt nil t)
|
||
(recenter '(0))))))
|
||
,re-narrow-maybe)))
|
||
(defun ,prev-sym (&optional count)
|
||
,(format "Go to the previous COUNT'th %s" (or name base-name))
|
||
(interactive)
|
||
(unless count (setq count 1))
|
||
(if (< count 0) (,next-sym (- count))
|
||
(let (was-narrowed)
|
||
,check-narrow-maybe
|
||
(unless (re-search-backward ,re nil t count)
|
||
(error "No previous %s" ,name))
|
||
,re-narrow-maybe))))))
|
||
|
||
|
||
(provide 'easy-mmode)
|
||
|
||
;;; arch-tag: d48a5250-6961-4528-9cb0-3c9ea042a66a
|
||
;;; easy-mmode.el ends here
|