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127 lines
3.7 KiB
EmacsLisp
127 lines
3.7 KiB
EmacsLisp
;;; gnus-eform.el --- a mode for editing forms for Gnus
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;; Copyright (C) 1996-2014 Free Software Foundation, Inc.
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;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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;; Keywords: news
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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 <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(require 'gnus)
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(require 'gnus-win)
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;;;
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;;; Editing forms
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;;;
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(defgroup gnus-edit-form nil
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"A mode for editing forms."
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:group 'gnus)
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(defcustom gnus-edit-form-mode-hook nil
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"Hook run in `gnus-edit-form-mode' buffers."
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:group 'gnus-edit-form
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:type 'hook)
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(defcustom gnus-edit-form-menu-hook nil
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"Hook run when creating menus in `gnus-edit-form-mode' buffers."
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:group 'gnus-edit-form
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:type 'hook)
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;;; Internal variables
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(defvar gnus-edit-form-buffer "*Gnus edit form*")
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(defvar gnus-edit-form-done-function nil)
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(defvar gnus-edit-form-mode-map nil)
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(unless gnus-edit-form-mode-map
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(setq gnus-edit-form-mode-map (make-sparse-keymap))
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(set-keymap-parent gnus-edit-form-mode-map emacs-lisp-mode-map)
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(gnus-define-keys gnus-edit-form-mode-map
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"\C-c\C-c" gnus-edit-form-done
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"\C-c\C-k" gnus-edit-form-exit))
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(defun gnus-edit-form-make-menu-bar ()
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(unless (boundp 'gnus-edit-form-menu)
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(easy-menu-define
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gnus-edit-form-menu gnus-edit-form-mode-map ""
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'("Edit Form"
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["Exit and save changes" gnus-edit-form-done t]
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["Exit" gnus-edit-form-exit t]))
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(gnus-run-hooks 'gnus-edit-form-menu-hook)))
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(define-derived-mode gnus-edit-form-mode fundamental-mode "Edit Form"
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"Major mode for editing forms.
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It is a slightly enhanced emacs-lisp-mode.
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\\{gnus-edit-form-mode-map}"
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(when (gnus-visual-p 'group-menu 'menu)
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(gnus-edit-form-make-menu-bar))
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(make-local-variable 'gnus-edit-form-done-function)
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(make-local-variable 'gnus-prev-winconf))
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(defun gnus-edit-form (form documentation exit-func &optional layout)
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"Edit FORM in a new buffer.
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Call EXIT-FUNC on exit. Display DOCUMENTATION in the beginning
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of the buffer.
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The optional LAYOUT overrides the `edit-form' window layout."
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(let ((winconf (current-window-configuration)))
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(set-buffer (gnus-get-buffer-create gnus-edit-form-buffer))
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(gnus-configure-windows (or layout 'edit-form))
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(gnus-edit-form-mode)
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(setq gnus-prev-winconf winconf)
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(setq gnus-edit-form-done-function exit-func)
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(erase-buffer)
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(insert documentation)
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(unless (bolp)
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(insert "\n"))
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(goto-char (point-min))
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(while (not (eobp))
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(insert ";;; ")
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(forward-line 1))
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(insert ";; Type `C-c C-c' after you've finished editing.\n")
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(insert "\n")
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(let ((p (point)))
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(gnus-pp form)
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(insert "\n")
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(goto-char p))))
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(defun gnus-edit-form-done ()
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"Update changes and kill the current buffer."
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(interactive)
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(goto-char (point-min))
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(let ((form (condition-case nil
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(read (current-buffer))
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(end-of-file nil)))
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(func gnus-edit-form-done-function))
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(gnus-edit-form-exit)
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(funcall func form)))
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(defun gnus-edit-form-exit ()
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"Kill the current buffer."
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(interactive)
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(let ((winconf gnus-prev-winconf))
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(kill-buffer (current-buffer))
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(set-window-configuration winconf)))
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(provide 'gnus-eform)
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;;; gnus-eform.el ends here
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