all messages for Emacs-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
blob 95e032479b5bfc97e0d6f591a234d7ccaff0ae8c 7505 bytes (raw)
name: lisp/ol-info.el 	 # note: path name is non-authoritative(*)

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
 
;;; ol-info.el --- Links to Info Nodes               -*- lexical-binding: t; -*-

;; Copyright (C) 2004-2023 Free Software Foundation, Inc.

;; Author: Carsten Dominik <carsten.dominik@gmail.com>
;; Keywords: outlines, hypermedia, calendar, wp
;; URL: 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 'org-macs)
(unless (version< emacs-version "29")
  (org-assert-version))

(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
                         :insert-description #'org-info-description-as-command)

;; 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--link-file-node (path)
  "Extract file name and node from info link PATH.

Return cons consisting of file name and node name or \"Top\" if node
part is not specified.  Components may be separated by \":\" or by \"#\".
File may be a virtual one, see `Info-virtual-files'."
  (if (not path)
      '("dir" . "Top")
    (string-match "\\`\\([^#:]*\\)\\(?:[#:]:?\\(.*\\)\\)?\\'" path)
    (let* ((node (match-string 2 path))
           ;; Do not reorder, `org-trim' modifies match.
           (file (org-trim (match-string 1 path))))
      (cons
       (if (org-string-nw-p file) file "dir")
       (if (org-string-nw-p node) (org-trim node) "Top")))))

(defun org-info-description-as-command (link desc)
  "Info link description that can be pasted as command.

For the following LINK

    \"info:elisp#Non-ASCII in Strings\"

the result is

    info \"(elisp) Non-ASCII in Strings\"

that may be executed as shell command or evaluated by
\\[eval-expression] (wrapped with parenthesis) to read the manual
in Emacs.

Calling convention is similar to `org-link-make-description-function'.
DESC has higher priority and returned when it is not nil or empty string.
If LINK is not an info link then DESC is returned."
  (let* ((prefix "info:")
         (need-file-node (and (not (org-string-nw-p desc))
                              (string-prefix-p prefix link))))
    (pcase (and need-file-node
                (org-info--link-file-node (org-unbracket-string prefix "" link)))
      ;; Unlike (info "dir"), "info dir" shell command opens "(coreutils)dir invocation".
      (`("dir" . "Top") "info \"(dir)\"")
      (`(,file . "Top") (format "info %s" file))
      (`(,file . ,node) (format "info \"(%s) %s\"" file node))
      (_ desc))))

(defun org-info-follow-link (name)
  "Follow an Info file and node link specified by NAME."
  (pcase-let ((`(,filename . ,nodename-or-index)
	       (org-info--link-file-node name)))
    (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))))))

(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
  '(("dir" . "https://www.gnu.org/manual/manual.html") ; index
    ("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."
  (pcase-let ((`(,manual . ,node) (org-info--link-file-node path)))
    (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

debug log:

solving 95e032479 ...
found 95e032479 in https://yhetil.org/emacs/87o7obn0dp.fsf@localhost/
found ad9e4a12b in https://git.savannah.gnu.org/cgit/emacs.git
preparing index
index prepared:
100644 ad9e4a12bd7de3f0409e63018fa0d1daf7903203	lisp/ol-info.el

applying [1/1] https://yhetil.org/emacs/87o7obn0dp.fsf@localhost/
diff --git a/lisp/ol-info.el b/lisp/ol-info.el
index ad9e4a12b..95e032479 100644

Checking patch lisp/ol-info.el...
Applied patch lisp/ol-info.el cleanly.

index at:
100644 95e032479b5bfc97e0d6f591a234d7ccaff0ae8c	lisp/ol-info.el

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this external index

	https://git.savannah.gnu.org/cgit/emacs.git
	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.