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-;;; ol-info.el --- Links to Info Nodes -*- lexical-binding: t; -*-
-
-;; Copyright (C) 2004-2021 Free Software Foundation, Inc.
-
-;; Author: Carsten Dominik <carsten.dominik@gmail.com>
-;; Keywords: outlines, hypermedia, calendar, wp
-;; Homepage: https://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 <https://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 'ol)
-
-;; Declare external functions and variables
-
-(declare-function Info-find-node "info"
- (filename nodename &optional no-going-back strict-case))
-(defvar Info-current-file)
-(defvar Info-current-node)
-
-;; Install the link type
-(org-link-set-parameters "info"
- :follow #'org-info-open
- :export #'org-info-export
- :store #'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 (concat "info:"
- (file-name-nondirectory Info-current-file)
- "#" Info-current-node))
- (desc (concat (file-name-nondirectory Info-current-file)
- "#" Info-current-node)))
- (org-link-store-props :type "info" :file Info-current-file
- :node Info-current-node
- :link link :description 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)))
-
-(defconst org-info-emacs-documents
- '("ada-mode" "auth" "autotype" "bovine" "calc" "ccmode" "cl" "dbus" "dired-x"
- "ebrowse" "ede" "ediff" "edt" "efaq-w32" "efaq" "eieio" "eintr" "elisp"
- "emacs-gnutls" "emacs-mime" "emacs" "epa" "erc" "ert" "eshell" "eudc" "eww"
- "flymake" "forms" "gnus" "htmlfontify" "idlwave" "ido" "info" "mairix-el"
- "message" "mh-e" "newsticker" "nxml-mode" "octave-mode" "org" "pcl-cvs"
- "pgg" "rcirc" "reftex" "remember" "sasl" "sc" "semantic" "ses" "sieve"
- "smtpmail" "speedbar" "srecode" "todo-mode" "tramp" "url" "vip" "viper"
- "widget" "wisent" "woman")
- "List of Emacs documents available.
-Taken from <https://www.gnu.org/software/emacs/manual/html_mono/.>")
-
-(defconst org-info-other-documents
- '(("libc" . "https://www.gnu.org/software/libc/manual/html_mono/libc.html")
- ("make" . "https://www.gnu.org/software/make/manual/make.html"))
- "Alist of documents generated from Texinfo source.
-When converting info links to HTML, links to any one of these manuals are
-converted to use these URL.")
-
-(defun org-info-map-html-url (filename)
- "Return URL or HTML file associated to Info FILENAME.
-If FILENAME refers to an official GNU document, return a URL pointing to
-the official page for that document, e.g., use \"gnu.org\" for all Emacs
-related documents. Otherwise, append \".html\" extension to FILENAME.
-See `org-info-emacs-documents' and `org-info-other-documents' for details."
- (cond ((member filename org-info-emacs-documents)
- (format "https://www.gnu.org/software/emacs/manual/html_mono/%s.html"
- filename))
- ((cdr (assoc filename org-info-other-documents)))
- (t (concat filename ".html"))))
-
-(defun org-info--expand-node-name (node)
- "Expand Info NODE to HTML cross reference."
- ;; See (info "(texinfo) HTML Xref Node Name Expansion") for the
- ;; expansion rule.
- (let ((node (replace-regexp-in-string
- "\\([ \t\n\r]+\\)\\|\\([^a-zA-Z0-9]\\)"
- (lambda (m)
- (if (match-end 1) "-" (format "_%04x" (string-to-char m))))
- (org-trim node))))
- (cond ((string= node "") "")
- ((string-match-p "\\`[0-9]" node) (concat "g_t" node))
- (t node))))
-
-(defun org-info-export (path desc format)
- "Export an info link.
-See `org-link-parameters' for details about PATH, DESC and FORMAT."
- (let* ((parts (split-string path "#\\|::"))
- (manual (car parts))
- (node (or (nth 1 parts) "Top")))
- (pcase format
- (`html
- (format "<a href=\"%s#%s\">%s</a>"
- (org-info-map-html-url manual)
- (org-info--expand-node-name node)
- (or desc path)))
- (`texinfo
- (let ((title (or desc "")))
- (format "@ref{%s,%s,,%s,}" node title manual)))
- (_ nil))))
-
-(provide 'ol-info)
-
-;;; ol-info.el ends here