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;;; org-info.el --- Support for links to Info nodes from within Org-Mode
;; Copyright (C) 2004-2016 Free Software Foundation, Inc.
;; Author: Carsten Dominik <carsten at orgmode dot org>
;; Keywords: outlines, hypermedia, calendar, wp
;; Homepage: http://orgmode.org
;;
;; 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 <http://www.gnu.org/licenses/>.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Commentary:
;; This file implements links to Info nodes from within Org-mode.
;; Org-mode loads this module by default - if this is not what you want,
;; configure the variable `org-modules'.
;;; Code:
(require 'org)
;; Declare external functions and variables
(declare-function Info-find-node "info" (filename nodename
&optional no-going-back))
(defvar Info-current-file)
(defvar Info-current-node)
;; Install the link type
(org-add-link-type "info" 'org-info-open 'org-info-export)
(add-hook 'org-store-link-functions 'org-info-store-link)
;; Implementation
(defun org-info-store-link ()
"Store a link to an Info file and node."
(when (eq major-mode 'Info-mode)
(let (link desc)
(setq link (concat "info:"
(file-name-nondirectory Info-current-file)
"#" Info-current-node))
(setq desc (concat (file-name-nondirectory Info-current-file)
"#" Info-current-node))
(org-store-link-props :type "info" :file Info-current-file
:node Info-current-node
:link link :desc desc)
link)))
(defun org-info-open (path)
"Follow an Info file and node link specified by PATH."
(org-info-follow-link path))
(defun org-info-follow-link (name)
"Follow an Info file and node link specified by NAME."
(if (or (string-match "\\(.*\\)[#:]:?\\(.*\\)" name)
(string-match "\\(.*\\)" name))
(let ((filename (match-string 1 name))
(nodename-or-index (or (match-string 2 name) "Top")))
(require 'info)
;; If nodename-or-index is invalid node name, then look it up
;; in the index.
(condition-case nil
(Info-find-node filename nodename-or-index)
(user-error (Info-find-node filename "Top")
(condition-case nil
(Info-index nodename-or-index)
(user-error "Could not find '%s' node or index entry"
nodename-or-index)))))
(user-error "Could not open: %s" name)))
(defun org-info-export (path desc format)
"Export an info link.
See `org-add-link-type' for details about PATH, DESC and FORMAT."
(when (eq format 'html)
(or (string-match "\\(.*\\)[#:]:?\\(.*\\)" path)
(string-match "\\(.*\\)" path))
(let ((filename (match-string 1 path))
(node (or (match-string 2 path) "Top")))
(format "<a href=\"%s.html#%s\">%s</a>"
filename
(replace-regexp-in-string " " "-" node)
(or desc path)))))
(provide 'org-info)
;;; org-info.el ends here
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