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ol.el
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;;; ol.el --- Org links library -*- lexical-binding: t; -*-
;; Copyright (C) 2018 Free Software Foundation, Inc.
;; Author: Carsten Dominik <carsten at orgmode dot org>
;; Keywords: outlines, hypermedia, calendar, wp
;; This program 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.
;; This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; This library provides tooling to handle both external and internal
;; links.
;;; Code:
(require 'org-compat)
(require 'org-macs)
(defvar clean-buffer-list-kill-buffer-names)
(defvar org-agenda-buffer-name)
(defvar org-comment-string)
(defvar org-highlight-links)
(defvar org-id-link-to-org-use-id)
(defvar org-inhibit-startup)
(defvar org-outline-regexp-bol)
(defvar org-src-source-file-name)
(defvar org-time-stamp-formats)
(defvar org-ts-regexp)
(declare-function calendar-cursor-to-date "calendar" (&optional error event))
(declare-function dired-get-filename "dired" (&optional localp no-error-if-not-filep))
(declare-function org-at-heading-p "org" (&optional _))
(declare-function org-back-to-heading "org" (&optional invisible-ok))
(declare-function org-do-occur "org" (regexp &optional cleanup))
(declare-function org-element-at-point "org-element" ())
(declare-function org-element-cache-refresh "org-element" (pos))
(declare-function org-element-context "org-element" (&optional element))
(declare-function org-element-lineage "org-element" (datum &optional types with-self))
(declare-function org-element-link-parser "org-element" ())
(declare-function org-element-property "org-element" (property element))
(declare-function org-element-type "org-element" (element))
(declare-function org-element-update-syntax "org-element" ())
(declare-function org-entry-get "org" (pom property &optional inherit literal-nil))
(declare-function org-find-property "org" (property &optional value))
(declare-function org-get-heading "org" (&optional no-tags no-todo no-priority no-comment))
(declare-function org-heading-components "org" ())
(declare-function org-id-find-id-file "org-id" (id))
(declare-function org-id-store-link "org-id" ())
(declare-function org-insert-heading "org" (&optional arg invisible-ok top))
(declare-function org-load-modules-maybe "org" (&optional force))
(declare-function org-mark-ring-push "org" (&optional pos buffer))
(declare-function org-occur "org" (regexp &optional keep-previous callback))
(declare-function org-open-file "org" (path &optional in-emacs line search))
(declare-function org-overview "org" ())
(declare-function org-restart-font-lock "org" ())
(declare-function org-show-context "org" (&optional key))
(declare-function org-src-coderef-format "org-src" (&optional element))
(declare-function org-src-coderef-regexp "org-src" (fmt &optional label))
(declare-function org-src-edit-buffer-p "org-src" (&optional buffer))
(declare-function org-src-source-buffer "org-src" ())
(declare-function org-src-source-type "org-src" ())
(declare-function org-time-stamp-format "org" (&optional long inactive))
(declare-function outline-next-heading "outline" ())
;;; Customization
(defgroup org-link nil
"Options concerning links in Org mode."
:tag "Org Link"
:group 'org)
(defcustom org-link-parameters nil
"An alist of properties that defines all the links in Org mode.
The key in each association is a string of the link type.
Subsequent optional elements make up a plist of link properties.
:follow - A function that takes the link path as an argument.
:export - A function that takes the link path, description and
export-backend as arguments.
:store - A function responsible for storing the link. See the
function `org-store-link-functions'.
:complete - A function that inserts a link with completion. The
function takes one optional prefix argument.
:face - A face for the link, or a function that returns a face.
The function takes one argument which is the link path. The
default face is `org-link'.
:mouse-face - The mouse-face. The default is `highlight'.
:display - `full' will not fold the link in descriptive
display. Default is `org-link'.
:help-echo - A string or function that takes (window object position)
as arguments and returns a string.
:keymap - A keymap that is active on the link. The default is
`org-mouse-map'.
:htmlize-link - A function for the htmlize-link. Defaults
to (list :uri \"type:path\")
:activate-func - A function to run at the end of font-lock
activation. The function must accept (link-start link-end path bracketp)
as arguments."
:group 'org-link
:package-version '(Org . "9.1")
:type '(alist :tag "Link display parameters"
:value-type plist)
:safe nil)
(defcustom org-link-descriptive t
"Non-nil means Org displays descriptive links.
E.g. [[https://orgmode.org][Org website]] is be displayed as
\"Org Website\", hiding the link itself and just displaying its
description. When set to nil, Org displays the full links
literally.
You can interactively set the value of this variable by calling
`org-toggle-link-display' or from the \"Org > Hyperlinks\" menu."
:group 'org-link
:type 'boolean
:safe #'booleanp)
(defcustom org-link-make-description-function nil
"Function to use for generating link descriptions from links.
This function must take two parameters: the first one is the
link, the second one is the description generated by
`org-insert-link'. The function should return the description to
use."
:group 'org-link
:type '(choice (const nil) (function))
:safe #'null)
(defcustom org-link-file-path-type 'adaptive
"How the path name in file links should be stored.
Valid values are:
relative Relative to the current directory, i.e. the directory of the file
into which the link is being inserted.
absolute Absolute path, if possible with ~ for home directory.
noabbrev Absolute path, no abbreviation of home directory.
adaptive Use relative path for files in the current directory and sub-
directories of it. For other files, use an absolute path."
:group 'org-link
:type '(choice
(const relative)
(const absolute)
(const noabbrev)
(const adaptive))
:safe #'symbolp)
(defcustom org-link-abbrev-alist nil
"Alist of link abbreviations.
The car of each element is a string, to be replaced at the start of a link.
The cdrs are replacement values, like (\"linkkey\" . REPLACE). Abbreviated
links in Org buffers can have an optional tag after a double colon, e.g.,
[[linkkey:tag][description]]
The `linkkey' must be a single word, starting with a letter, followed
by letters, numbers, `-' or `_'.
If REPLACE is a string, the tag will simply be appended to create the link.
If the string contains \"%s\", the tag will be inserted there. If the string
contains \"%h\", it will cause a url-encoded version of the tag to be inserted
at that point (see the function `url-hexify-string'). If the string contains
the specifier \"%(my-function)\", then the custom function `my-function' will
be invoked: this function takes the tag as its only argument and must return
a string.
REPLACE may also be a function that will be called with the tag as the
only argument to create the link, which should be returned as a string.
See the manual for examples."
:group 'org-link
:type '(repeat
(cons (string :tag "Protocol")
(choice
(string :tag "Format")
(function))))
:safe (lambda (val)
(pcase val
(`(,(pred stringp) . ,(pred stringp)) t)
(_ nil))))
(defgroup org-link-follow nil
"Options concerning following links in Org mode."
:tag "Org Follow Link"
:group 'org-link)
(defcustom org-link-translation-function nil
"Function to translate links with different syntax to Org syntax.
This can be used to translate links created for example by the Planner
or emacs-wiki packages to Org syntax.
The function must accept two parameters, a TYPE containing the link
protocol name like \"rmail\" or \"gnus\" as a string, and the linked path,
which is everything after the link protocol. It should return a cons
with possibly modified values of type and path.
Org contains a function for this, so if you set this variable to
`org-translate-link-from-planner', you should be able follow many
links created by planner."
:group 'org-link-follow
:type '(choice (const nil) (function))
:safe #'null)
(defcustom org-link-doi-server-url "http://dx.doi.org/"
"The URL of the DOI server."
:group 'org-link-follow
:version "24.3"
:type 'string
:safe #'stringp)
(defcustom org-link-frame-setup
'((vm . vm-visit-folder-other-frame)
(vm-imap . vm-visit-imap-folder-other-frame)
(gnus . org-gnus-no-new-news)
(file . find-file-other-window)
(wl . wl-other-frame))
"Setup the frame configuration for following links.
When following a link with Emacs, it may often be useful to display
this link in another window or frame. This variable can be used to
set this up for the different types of links.
For VM, use any of
`vm-visit-folder'
`vm-visit-folder-other-window'
`vm-visit-folder-other-frame'
For Gnus, use any of
`gnus'
`gnus-other-frame'
`org-gnus-no-new-news'
For FILE, use any of
`find-file'
`find-file-other-window'
`find-file-other-frame'
For Wanderlust use any of
`wl'
`wl-other-frame'
For the calendar, use the variable `calendar-setup'.
For BBDB, it is currently only possible to display the matches in
another window."
:group 'org-link-follow
:type '(list
(cons (const vm)
(choice
(const vm-visit-folder)
(const vm-visit-folder-other-window)
(const vm-visit-folder-other-frame)))
(cons (const vm-imap)
(choice
(const vm-visit-imap-folder)
(const vm-visit-imap-folder-other-window)
(const vm-visit-imap-folder-other-frame)))
(cons (const gnus)
(choice
(const gnus)
(const gnus-other-frame)
(const org-gnus-no-new-news)))
(cons (const file)
(choice
(const find-file)
(const find-file-other-window)
(const find-file-other-frame)))
(cons (const wl)
(choice
(const wl)
(const wl-other-frame))))
:safe nil)
(defcustom org-link-search-must-match-exact-headline 'query-to-create
"Non-nil means internal fuzzy links can only match headlines.
When nil, the a fuzzy link may point to a target or a named
construct in the document. When set to the special value
`query-to-create', offer to create a new headline when none
matched.
Spaces and statistics cookies are ignored during heading searches."
:group 'org-link-follow
:version "24.1"
:type '(choice
(const :tag "Use fuzzy text search" nil)
(const :tag "Match only exact headline" t)
(const :tag "Match exact headline or query to create it"
query-to-create))
:safe #'symbolp)
(defcustom org-link-use-indirect-buffer-for-internals nil
"Non-nil means use indirect buffer to display infile links.
Activating internal links (from one location in a file to another location
in the same file) normally just jumps to the location. When the link is
activated with a `\\[universal-argument]' prefix (or with mouse-3), the link \
is displayed in
another window. When this option is set, the other window actually displays
an indirect buffer clone of the current buffer, to avoid any visibility
changes to the current buffer."
:group 'org-link-follow
:type 'boolean
:safe #'booleanp)
(defcustom org-link-shell-confirm-function 'yes-or-no-p
"Non-nil means ask for confirmation before executing shell links.
Shell links can be dangerous: just think about a link
[[shell:rm -rf ~/*][Google Search]]
This link would show up in your Org document as \"Google Search\",
but really it would remove your entire home directory.
Therefore we advise against setting this variable to nil.
Just change it to `y-or-n-p' if you want to confirm with a
single keystroke rather than having to type \"yes\"."
:group 'org-link-follow
:type '(choice
(const :tag "with yes-or-no (safer)" yes-or-no-p)
(const :tag "with y-or-n (faster)" y-or-n-p)
(const :tag "no confirmation (dangerous)" nil))
:safe nil)
(defcustom org-link-shell-skip-confirm-regexp ""
"Regexp to skip confirmation for shell links."
:group 'org-link-follow
:version "24.1"
:type 'regexp
:safe nil)
(defcustom org-link-elisp-confirm-function 'yes-or-no-p
"Non-nil means ask for confirmation before executing Emacs Lisp links.
Elisp links can be dangerous: just think about a link
[[elisp:(shell-command \"rm -rf ~/*\")][Google Search]]
This link would show up in your Org document as \"Google Search\",
but really it would remove your entire home directory.
Therefore we advise against setting this variable to nil.
Just change it to `y-or-n-p' if you want to confirm with a
single keystroke rather than having to type \"yes\"."
:group 'org-link-follow
:type '(choice
(const :tag "with yes-or-no (safer)" yes-or-no-p)
(const :tag "with y-or-n (faster)" y-or-n-p)
(const :tag "no confirmation (dangerous)" nil))
:safe nil)
(defcustom org-link-elisp-skip-confirm-regexp ""
"A regexp to skip confirmation for Elisp links."
:group 'org-link-follow
:version "24.1"
:type 'regexp
:safe nil)
(defgroup org-link-store nil
"Options concerning storing links in Org mode."
:tag "Org Store Link"
:group 'org-link)
(defcustom org-link-context-for-files t
"Non-nil means file links from `org-store-link' contain context.
\\<org-mode-map>
A search string is added to the file name with \"::\" as separator
and used to find the context when the link is activated by the command
`org-open-at-point'. When this option is t, the entire active region
is be placed in the search string of the file link. If set to a
positive integer N, only the first N lines of context are stored.
Using a prefix argument to the command `org-store-link' \
\(`\\[universal-argument] \\[org-store-link]')
negates this setting for the duration of the command."
:group 'org-link-store
:type '(choice boolean integer)
:safe (lambda (val) (or (booleanp val) (integerp val))))
(defcustom org-link-email-description-format "Email %c: %s"
"Format of the description part of a link to an email or usenet message.
The following %-escapes will be replaced by corresponding information:
%F full \"From\" field
%f name, taken from \"From\" field, address if no name
%T full \"To\" field
%t first name in \"To\" field, address if no name
%c correspondent. Usually \"from NAME\", but if you sent it yourself, it
will be \"to NAME\". See also the variable `org-from-is-user-regexp'.
%s subject
%d date
%m message-id.
You may use normal field width specification between the % and the letter.
This is for example useful to limit the length of the subject.
Examples: \"%f on: %.30s\", \"Email from %f\", \"Email %c\""
:group 'org-link-store
:package-version '(Org . 9.3)
:type 'string
:safe #'stringp)
(defcustom org-link-from-user-regexp
(let ((mail (and (org-string-nw-p user-mail-address)
(format "\\<%s\\>" (regexp-quote user-mail-address))))
(name (and (org-string-nw-p user-full-name)
(format "\\<%s\\>" (regexp-quote user-full-name)))))
(if (and mail name) (concat mail "\\|" name) (or mail name)))
"Regexp matched against the \"From:\" header of an email or Usenet message.
It should match if the message is from the user him/herself."
:group 'org-link-store
:type 'regexp
:safe #'stringp)
(defcustom org-link-keep-stored-after-insertion nil
"Non-nil means keep link in list for entire session.
\\<org-mode-map>
The command `org-store-link' adds a link pointing to the current
location to an internal list. These links accumulate during a session.
The command `org-insert-link' can be used to insert links into any
Org file (offering completion for all stored links).
When this option is nil, every link which has been inserted once using
`\\[org-insert-link]' will be removed from the list, to make completing the \
unused
links more efficient."
:group 'org-link-store
:type 'boolean
:safe #'booleanp)
;;; Public variables
(defconst org-target-regexp (let ((border "[^<>\n\r \t]"))
(format "<<\\(%s\\|%s[^<>\n\r]*%s\\)>>"
border border border))
"Regular expression matching a link target.")
(defconst org-radio-target-regexp (format "<%s>" org-target-regexp)
"Regular expression matching a radio target.")
(defvar-local org-target-link-regexp nil
"Regular expression matching radio targets in plain text.")
(defvar org-link-types-re nil
"Matches a link that has a url-like prefix like \"http:\"")
(defvar org-link-angle-re nil
"Matches link with angular brackets, spaces are allowed.")
(defvar org-link-plain-re nil
"Matches plain link, without spaces.")
(defvar org-link-bracket-re nil
"Matches a link in double brackets.")
(defvar org-link-any-re nil
"Regular expression matching any link.")
(defvar-local org-link-abbrev-alist-local nil
"Buffer-local version of `org-link-abbrev-alist', which see.
The value of this is taken from the LINK keywords.")
(defvar org-stored-links nil
"Contains the links stored with `org-store-link'.")
(defvar org-store-link-plist nil
"Plist with info about the most recently link created with `org-store-link'.")
(defvar org-create-file-search-functions nil
"List of functions to construct the right search string for a file link.
These functions are called in turn with point at the location to
which the link should point.
A function in the hook should first test if it would like to
handle this file type, for example by checking the `major-mode'
or the file extension. If it decides not to handle this file, it
should just return nil to give other functions a chance. If it
does handle the file, it must return the search string to be used
when following the link. The search string will be part of the
file link, given after a double colon, and `org-open-at-point'
will automatically search for it. If special measures must be
taken to make the search successful, another function should be
added to the companion hook `org-execute-file-search-functions',
which see.
A function in this hook may also use `setq' to set the variable
`description' to provide a suggestion for the descriptive text to
be used for this link when it gets inserted into an Org buffer
with \\[org-insert-link].")
(defvar org-execute-file-search-functions nil
"List of functions to execute a file search triggered by a link.
Functions added to this hook must accept a single argument, the
search string that was part of the file link, the part after the
double colon. The function must first check if it would like to
handle this search, for example by checking the `major-mode' or
the file extension. If it decides not to handle this search, it
should just return nil to give other functions a chance. If it
does handle the search, it must return a non-nil value to keep
other functions from trying.
Each function can access the current prefix argument through the
variable `current-prefix-arg'. Note that a single prefix is used
to force opening a link in Emacs, so it may be good to only use a
numeric or double prefix to guide the search function.
In case this is needed, a function in this hook can also restore
the window configuration before `org-open-at-point' was called using:
(set-window-configuration org-window-config-before-follow-link)")
(defvar org-open-link-functions nil
"Hook for functions finding a plain text link.
These functions must take a single argument, the link content.
They will be called for links that look like [[link text][description]]
when LINK TEXT does not have a protocol like \"http:\" and does not look
like a filename (e.g. \"./blue.png\").
These functions will be called *before* Org attempts to resolve the
link by doing text searches in the current buffer - so if you want a
link \"[[target]]\" to still find \"<<target>>\", your function should
handle this as a special case.
When the function does handle the link, it must return a non-nil value.
If it decides that it is not responsible for this link, it must return
nil to indicate that that Org can continue with other options like
exact and fuzzy text search.")
;;; Internal Variables
(defconst org-link--forbidden-chars "]\t\n\r<>"
"Characters forbidden within a link, as a string.")
(defvar org-link--history nil
"History for inserted links.")
(defvar org-link--insert-history nil
"Minibuffer history for links inserted with `org-insert-link'.")
(defvar org-link--search-failed nil
"Non-nil when last link search failed.")
;;; Internal Functions
(defun org-link--try-special-completion (type)
"If there is completion support for link type TYPE, offer it."
(let ((fun (org-link-get-parameter type :complete)))
(if (functionp fun)
(funcall fun)
(read-string "Link (no completion support): " (concat type ":")))))
(defun org-link--prettify (link)
"Return a human-readable representation of LINK.
The car of LINK must be a raw link. The cdr of LINK must be
either a link description or nil."
(let ((desc (or (cadr link) "<no description>")))
(concat (format "%-45s" (substring desc 0 (min (length desc) 40)))
"<" (car link) ">")))
(defun org-link--decode-compound (hex)
"Unhexify Unicode hex-chars HEX.
E.g. \"%C3%B6\" is the German o-Umlaut. Note: this function also
decodes single byte encodings like \"%E1\" (a-acute) if not
followed by another \"%[A-F0-9]{2}\" group."
(save-match-data
(let* ((bytes (cdr (split-string hex "%")))
(ret "")
(eat 0)
(sum 0))
(while bytes
(let* ((val (string-to-number (pop bytes) 16))
(shift-xor
(if (= 0 eat)
(cond
((>= val 252) (cons 6 252))
((>= val 248) (cons 5 248))
((>= val 240) (cons 4 240))
((>= val 224) (cons 3 224))
((>= val 192) (cons 2 192))
(t (cons 0 0)))
(cons 6 128))))
(when (>= val 192) (setq eat (car shift-xor)))
(setq val (logxor val (cdr shift-xor)))
(setq sum (+ (lsh sum (car shift-xor)) val))
(when (> eat 0) (setq eat (- eat 1)))
(cond
((= 0 eat) ;multi byte
(setq ret (concat ret (char-to-string sum)))
(setq sum 0))
((not bytes) ; single byte(s)
(setq ret (org-link--decode-single-byte-sequence hex))))))
ret)))
(defun org-link--decode-single-byte-sequence (hex)
"Unhexify hex-encoded single byte character sequence HEX."
(mapconcat (lambda (byte)
(char-to-string (string-to-number byte 16)))
(cdr (split-string hex "%"))
""))
(defun org-link--fontify-links-to-this-file ()
"Fontify links to the current file in `org-stored-links'."
(let ((f (buffer-file-name)) a b)
(setq a (mapcar (lambda(l)
(let ((ll (car l)))
(when (and (string-match "^file:\\(.+\\)::" ll)
(equal f (expand-file-name (match-string 1 ll))))
ll)))
org-stored-links))
(when (featurep 'org-id)
(setq b (mapcar (lambda(l)
(let ((ll (car l)))
(when (and (string-match "^id:\\(.+\\)$" ll)
(equal f (expand-file-name
(or (org-id-find-id-file
(match-string 1 ll)) ""))))
ll)))
org-stored-links)))
(mapcar (lambda(l)
(put-text-property 0 (length l) 'face 'font-lock-comment-face l))
(delq nil (append a b)))))
(defun org-link--buffer-for-internals ()
"Return buffer used for displaying the target of internal links."
(cond
((not org-link-use-indirect-buffer-for-internals) (current-buffer))
((string-suffix-p "(Clone)" (buffer-name))
(message "Buffer is already a clone, not making another one")
;; We also do not modify visibility in this case.
(current-buffer))
(t ;make a new indirect buffer for displaying the link
(let* ((indirect-buffer-name (concat (buffer-name) "(Clone)"))
(indirect-buffer
(or (get-buffer indirect-buffer-name)
(make-indirect-buffer (current-buffer)
indirect-buffer-name
'clone))))
(with-current-buffer indirect-buffer (org-overview))
indirect-buffer))))
(defun org-link--search-radio-target (target)
"Search a radio target matching TARGET in current buffer.
White spaces are not significant."
(let ((re (format "<<<%s>>>"
(mapconcat #'regexp-quote
(split-string target)
"[ \t]+\\(?:\n[ \t]*\\)?")))
(origin (point)))
(goto-char (point-min))
(catch :radio-match
(while (re-search-forward re nil t)
(forward-char -1)
(let ((object (org-element-context)))
(when (eq (org-element-type object) 'radio-target)
(goto-char (org-element-property :begin object))
(org-show-context 'link-search)
(throw :radio-match nil))))
(goto-char origin)
(user-error "No match for radio target: %s" target))))
;;; Public API
(defun org-link-types ()
"Return a list of known link types."
(mapcar #'car org-link-parameters))
(defun org-link-get-parameter (type key)
"Get TYPE link property for KEY.
TYPE is a string and KEY is a plist keyword. See
`org-link-parameters' for supported keywords."
(plist-get (cdr (assoc type org-link-parameters))
key))
(defun org-link-set-parameters (type &rest parameters)
"Set link TYPE properties to PARAMETERS.
PARAMETERS should be keyword value pairs. See
`org-link-parameters' for supported keys."
(let ((data (assoc type org-link-parameters)))
(if data (setcdr data (org-combine-plists (cdr data) parameters))
(push (cons type parameters) org-link-parameters)
(org-link-make-regexps)
(when (featurep 'org-element) (org-element-update-syntax)))))
(defun org-link-make-regexps ()
"Update the link regular expressions.
This should be called after the variable `org-link-parameters' has changed."
(let ((types-re (regexp-opt (org-link-types) t)))
(setq org-link-types-re
(concat "\\`" types-re ":")
org-link-angle-re
(format "<%s:\\([^>\n]*\\(?:\n[ \t]*[^> \t\n][^>\n]*\\)*\\)>"
types-re)
org-link-plain-re
(concat
"\\<" types-re ":"
"\\([^][ \t\n()<>]+\\(?:([[:word:]0-9_]+)\\|\\([^[:punct:] \t\n]\\|/\\)\\)\\)")
;; "\\([^]\t\n\r<>() ]+[^]\t\n\r<>,.;() ]\\)")
org-link-bracket-re
(rx (seq "[["
;; URI part: match group 1.
(group
(*? anything)
;; Allow an even number of backslashes right
;; before the closing bracket.
(not (any "\\"))
(zero-or-more "\\\\"))
"]"
;; Description (optional): match group 2.
(opt "[" (group (+? anything)) "]")
"]"))
org-link-any-re
(concat "\\(" org-link-bracket-re "\\)\\|\\("
org-link-angle-re "\\)\\|\\("
org-link-plain-re "\\)"))))
(defun org-link-complete-file (&optional arg)
"Create a file link using completion."
(let ((file (read-file-name "File: "))
(pwd (file-name-as-directory (expand-file-name ".")))
(pwd1 (file-name-as-directory (abbreviate-file-name
(expand-file-name ".")))))
(cond ((equal arg '(16))
(concat "file:"
(abbreviate-file-name (expand-file-name file))))
((string-match
(concat "^" (regexp-quote pwd1) "\\(.+\\)") file)
(concat "file:" (match-string 1 file)))
((string-match
(concat "^" (regexp-quote pwd) "\\(.+\\)")
(expand-file-name file))
(concat "file:"
(match-string 1 (expand-file-name file))))
(t (concat "file:" file)))))
(defun org-link-email-description (&optional fmt)
"Return the description part of an email link.
This takes information from `org-store-link-plist' and formats it
according to FMT (default from `org-link-email-description-format')."
(setq fmt (or fmt org-link-email-description-format))
(let* ((p org-store-link-plist)
(to (plist-get p :toaddress))
(from (plist-get p :fromaddress))
(table
(list
(cons "%c" (plist-get p :fromto))
(cons "%F" (plist-get p :from))
(cons "%f" (or (plist-get p :fromname) (plist-get p :fromaddress) "?"))
(cons "%T" (plist-get p :to))
(cons "%t" (or (plist-get p :toname) (plist-get p :toaddress) "?"))
(cons "%s" (plist-get p :subject))
(cons "%d" (plist-get p :date))
(cons "%m" (plist-get p :message-id)))))
(when (string-match "%c" fmt)
;; Check if the user wrote this message
(if (and org-link-from-user-regexp from to
(save-match-data (string-match org-link-from-user-regexp from)))
(setq fmt (replace-match "to %t" t t fmt))
(setq fmt (replace-match "from %f" t t fmt))))
(org-replace-escapes fmt table)))
(defun org-link-store-props (&rest plist)
"Store link properties.
The properties are pre-processed by extracting names, addresses
and dates."
(let ((x (plist-get plist :from)))
(when x
(let ((adr (mail-extract-address-components x)))
(setq plist (plist-put plist :fromname (car adr)))
(setq plist (plist-put plist :fromaddress (nth 1 adr))))))
(let ((x (plist-get plist :to)))
(when x
(let ((adr (mail-extract-address-components x)))
(setq plist (plist-put plist :toname (car adr)))
(setq plist (plist-put plist :toaddress (nth 1 adr))))))
(let ((x (ignore-errors (date-to-time (plist-get plist :date)))))
(when x
(setq plist (plist-put plist :date-timestamp
(format-time-string
(org-time-stamp-format t) x)))
(setq plist (plist-put plist :date-timestamp-inactive
(format-time-string
(org-time-stamp-format t t) x)))))
(let ((from (plist-get plist :from))
(to (plist-get plist :to)))
(when (and from to org-link-from-user-regexp)
(setq plist
(plist-put plist :fromto
(if (string-match org-link-from-user-regexp from)
(concat "to %t")
(concat "from %f"))))))
(setq org-store-link-plist plist))
(defun org-link-add-props (&rest plist)
"Add these properties to the link property list."
(let (key value)
(while plist
(setq key (pop plist) value (pop plist))
(setq org-store-link-plist
(plist-put org-store-link-plist key value)))))
(defun org-link-encode (text table)
"Return percent escaped representation of string TEXT.
TEXT is a string with the text to escape. TABLE is a list of
characters that should be escaped."
(mapconcat
(lambda (c)
(if (memq c table)
(mapconcat (lambda (e) (format "%%%.2X" e))
(or (encode-coding-char c 'utf-8)
(error "Unable to percent escape character: %c" c))
"")
(char-to-string c)))
text ""))
(defun org-link-decode (s)
"Decode percent-encoded parts in string S.
E.g. \"%C3%B6\" becomes the german o-Umlaut."
(replace-regexp-in-string "\\(%[0-9A-Za-z]\\{2\\}\\)+"
#'org-link--decode-compound s t t))
(defun org-link-escape (link)
"Backslash-escape sensitive characters in string LINK."
;; Escape closing square brackets followed by another square bracket
;; or at the end of the link. Also escape final backslashes so that
;; we do not escape inadvertently URI's closing bracket.
(with-temp-buffer
(insert link)
(insert (make-string (- (skip-chars-backward "\\\\"))
?\\))
(while (search-backward "\]" nil t)
(when (looking-at-p "\\]\\(?:[][]\\|\\'\\)")
(insert (make-string (1+ (- (skip-chars-backward "\\\\")))
?\\))))
(buffer-string)))
(defun org-link-unescape (link)
"Remove escaping backslash characters from string LINK."
(with-temp-buffer
(save-excursion (insert link))
(while (re-search-forward "\\(\\\\+\\)\\]\\(?:[][]\\|\\'\\)" nil t)
(replace-match (make-string (/ (- (match-end 1) (match-beginning 1)) 2)
?\\)
nil t nil 1))
(goto-char (point-max))
(delete-char (/ (- (skip-chars-backward "\\\\")) 2))
(buffer-string)))
(defun org-link-make-string (link &optional description)
"Make a bracket link, consisting of LINK and DESCRIPTION.
LINK is escaped with backslashes for inclusion in buffer."
(unless (org-string-nw-p link) (error "Empty link"))
(let* ((uri (org-link-escape link))
(zero-width-space (string ?\x200B))
(description
(and (org-string-nw-p description)
;; Description cannot contain two consecutive square
;; brackets, or end with a square bracket. To prevent
;; this, insert a zero width space character between
;; the brackets, or at the end of the description.
(replace-regexp-in-string
"\\(]\\)\\(]\\)"
(concat "\\1" zero-width-space "\\2")
(replace-regexp-in-string "]\\'"
(concat "\\&" zero-width-space)
(org-trim description))))))
(format "[[%s]%s]"
uri
(if description (format "[%s]" description) ""))))
(defun org-store-link-functions ()
"List of functions that are called to create and store a link.
The functions are defined in the `:store' property of
`org-link-parameters'.
Each function will be called in turn until one returns a non-nil
value. Each function should check if it is responsible for
creating this link (for example by looking at the major mode).
If not, it must exit and return nil. If yes, it should return
a non-nil value after calling `org-link-store-props' with a list
of properties and values. Special properties are:
:type The link prefix, like \"http\". This must be given.
:link The link, like \"http://www.astro.uva.nl/~dominik\".
This is obligatory as well.
:description Optional default description for the second pair
of brackets in an Org mode link. The user can still change
this when inserting this link into an Org mode buffer.
In addition to these, any additional properties can be specified
and then used in capture templates."
(cl-loop for link in org-link-parameters
with store-func
do (setq store-func (org-link-get-parameter (car link) :store))
if store-func
collect store-func))
(defun org-link-expand-abbrev (link)
"Replace link abbreviations in LINK string.
Abbreviations are defined in `org-link-abbrev-alist'."
(if (not (string-match "^\\([^:]*\\)\\(::?\\(.*\\)\\)?$" link)) link
(let* ((key (match-string 1 link))
(as (or (assoc key org-link-abbrev-alist-local)
(assoc key org-link-abbrev-alist)))
(tag (and (match-end 2) (match-string 3 link)))
rpl)
(if (not as)
link
(setq rpl (cdr as))
(cond
((symbolp rpl) (funcall rpl tag))
((string-match "%(\\([^)]+\\))" rpl)
(replace-match
(save-match-data
(funcall (intern-soft (match-string 1 rpl)) tag)) t t rpl))
((string-match "%s" rpl) (replace-match (or tag "") t t rpl))
((string-match "%h" rpl)
(replace-match (url-hexify-string (or tag "")) t t rpl))
(t (concat rpl tag)))))))
(defun org-link-open (link &optional arg)
"Open a link object LINK.
Optional argument is passed to `org-open-file' when S is
a \"file\" link."
(let ((type (org-element-property :type link))
(path (org-element-property :path link)))
(cond
((equal type "file")
(if (string-match "[*?{]" (file-name-nondirectory path))
(dired path)
;; Look into `org-link-parameters' in order to find
;; a DEDICATED-FUNCTION to open file. The function will be
;; applied on raw link instead of parsed link due to the
;; limitation in `org-add-link-type' ("open" function called
;; with a single argument). If no such function is found,
;; fallback to `org-open-file'.
(let* ((option (org-element-property :search-option link))
(app (org-element-property :application link))
(dedicated-function
(org-link-get-parameter (if app (concat type "+" app) type)
:follow)))
(if dedicated-function
(funcall dedicated-function
(concat path
(and option (concat "::" option))))
(apply #'org-open-file
path
(cond (arg)
((equal app "emacs") 'emacs)
((equal app "sys") 'system))
(cond ((not option) nil)
((string-match-p "\\`[0-9]+\\'" option)
(list (string-to-number option)))
(t (list nil option))))))))
((functionp (org-link-get-parameter type :follow))
(funcall (org-link-get-parameter type :follow) path))
((member type '("coderef" "custom-id" "fuzzy" "radio"))
(unless (run-hook-with-args-until-success 'org-open-link-functions path)
(if (not arg) (org-mark-ring-push)
(switch-to-buffer-other-window (org-link--buffer-for-internals)))
(let ((destination
(org-with-wide-buffer
(if (equal type "radio")
(org-link--search-radio-target
(org-element-property :path link))
(org-link-search
(pcase type
("custom-id" (concat "#" path))
("coderef" (format "(%s)" path))
(_ path))
;; Prevent fuzzy links from matching themselves.
(and (equal type "fuzzy")
(+ 2 (org-element-property :begin link)))))
(point))))
(unless (and (<= (point-min) destination)
(>= (point-max) destination))
(widen))
(goto-char destination))))
(t (browse-url-at-point)))))
(defun org-link-open-from-string (s &optional arg)
"Open a link in the string S, as if it was in Org mode.
Optional argument is passed to `org-open-file' when S is
a \"file\" link."
(interactive "sLink: \nP")