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ol.el
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;;; ol.el --- Org links library -*- lexical-binding: t; -*-
;; Copyright (C) 2018-2025 Free Software Foundation, Inc.
;; Author: Carsten Dominik <[email protected]>
;; Keywords: outlines, hypermedia, calendar, text
;; 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 library provides tooling to handle both external and internal
;; links.
;;; Code:
(require 'org-macs)
(org-assert-version)
(require 'org-compat)
(require 'org-macs)
(require 'org-fold)
(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-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-before-first-heading-p "org" ())
(declare-function org-do-occur "org" (regexp &optional cleanup))
(declare-function org-element-at-point "org-element" (&optional pom cached-only))
(declare-function org-element-cache-refresh "org-element" (pos))
(declare-function org-element-cache-reset "org-element" (&optional all no-persistence))
(declare-function org-element-context "org-element" (&optional element))
(declare-function org-element-lineage "org-element-ast" (datum &optional types with-self))
(declare-function org-element-link-parser "org-element" ())
(declare-function org-element-property "org-element-ast" (property node))
(declare-function org-element-begin "org-element" (node))
(declare-function org-element-end "org-element" (node))
(declare-function org-element-type-p "org-element-ast" (node types))
(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-id-find-id-file "org-id" (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-mode "org" ())
(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-cycle-overview "org-cycle" ())
(declare-function org-restart-font-lock "org" ())
(declare-function org-run-like-in-org-mode "org" (cmd))
(declare-function org-fold-show-context "org-fold" (&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" ())
(declare-function image-flush "image" (spec &optional frame))
(declare-function org-entry-end-position "org" ())
(declare-function org-element-contents-begin "org-element" (node))
(declare-function org-element-contents-end "org-element" (node))
(declare-function org-property-or-variable-value "org" (var &optional inherit))
;;; Customization
(defgroup org-link nil
"Options concerning links in Org mode."
:tag "Org Link"
:group 'org)
(defcustom org-link-parameters nil
"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 property list for that
type.
All properties are optional. However, the most important ones
are, in this order, `:follow', `:export', and `:store', described
below.
`:follow'
Function used to follow the link, when the `org-open-at-point'
command runs on it. It is called with two arguments: the path,
as a string, and a universal prefix argument.
Here, you may use `org-link-open-as-file' helper function for
types similar to \"file\".
`:export'
Function that accepts four arguments:
- the path, as a string,
- the description as a string, or nil,
- the export backend,
- the export communication channel, as a plist.
When nil, export for that type of link is delegated to the
backend.
`:store'
Function responsible for storing the link. See the function
`org-store-link-functions' for a description of the expected
arguments.
Additional properties provide more specific control over the
link.
`:activate-func'
Function to run at the end of Font Lock activation. It must
accept four arguments:
- the buffer position at the start of the link,
- the buffer position at its end,
- the path, as a string,
- a boolean, non-nil when the link has brackets.
`:complete'
Function that inserts a link with completion. The function
takes one optional prefix argument.
`:insert-description'
String or function used as a default when prompting users for a
link's description. A string is used as-is, a function is
called with two arguments: the link location (a string such as
\"~/foobar\", \"id:some-org-id\" or \"https://www.foo.com\")
and the description generated by `org-insert-link'. It should
return the description to use (this reflects the behavior of
`org-link-make-description-function'). If it returns nil, no
default description is used, but no error is thrown (from the
user's perspective, this is equivalent to a default description
of \"\").
`:display'
Value for `invisible' text property on the hidden parts of the
link. The most useful value is `full', which will not fold the
link in descriptive display. Default is `org-link'.
`:face'
Face for the link, or a function returning a face. The
function takes one argument, which is the path.
The default face is `org-link'.
`:preview'
Function to run to generate an in-buffer preview for the link. It
must accept three arguments:
- an overlay placed from the start to the end of the link
- the link path, as a string
- the syntax node for the link
This function must return a non-nil value to indicate success.
A return value of nil implies that the preview failed, and the
overlay placed on the link will be removed.
`:help-echo'
String or function used as a value for the `help-echo' text
property. The function is called with one argument, the help
string to display, and should return a string.
`:htmlize-link'
Function or plist for the `htmlize-link' text property. The
function takes no argument.
Default is (:uri \"type:path\")
`:keymap'
Active keymap when point is on the link. Default is
`org-mouse-map'.
`:mouse-face'
Face used when hovering over the link. Default is
`highlight'."
:group 'org-link
:package-version '(Org . "9.1")
:type '(alist :tag "Link display parameters"
:value-type plist))
(defun org-link--set-link-display (symbol value)
"Set `org-link-descriptive' (SYMBOL) to VALUE.
Also, ensure that links are updated in current buffer.
This function is intended to be used as a :set function."
(set symbol value)
(dolist (buf (org-buffer-list))
(with-current-buffer buf
(org-restart-font-lock))))
(defcustom org-link-descriptive t
"Non-nil means Org displays descriptive links.
E.g. [[https://orgmode.org][Org website]] is 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
:set #'org-link--set-link-display
: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. If it returns nil, no default description is used, but no
error is thrown (from the user’s perspective, this is equivalent
to a default description of \"\")."
: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.
Alternatively, users may supply a custom function that takes the
filename in the link as an argument and returns the path."
:group 'org-link
:type '(choice
(const relative)
(const absolute)
(const noabbrev)
(const adaptive)
(function))
:package-version '(Org . "9.5")
: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 (alist)
(when (listp alist)
(catch :unsafe
(dolist (val alist)
(pcase val
(`(,(pred stringp) . ,(pred stringp)) t)
(_ (throw :unsafe nil))))
t))))
(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."
:group 'org-link-follow
:type '(choice (const nil) (function))
:safe #'null)
(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)))))
(defcustom org-link-search-must-match-exact-headline 'query-to-create
"Control fuzzy link behavior when specific matches not found.
When nil, if a fuzzy link does not match a more specific
target (such as a heading, named block, target, or code ref),
attempt a regular text search. When set to the special value
`query-to-create', offer to create a new heading matching the
link instead. Otherwise, signal an error rather than attempting
a regular text search.
This option only affects behavior in Org buffers. 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 ~/*][Web Search]]
This link would show up in your Org document as \"Web 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)))
(defcustom org-link-shell-skip-confirm-regexp ""
"Regexp to skip confirmation for shell links."
:group 'org-link-follow
:version "24.1"
:type 'regexp)
(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 ~/*\")][Web Search]]
This link would show up in your Org document as \"Web 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)))
(defcustom org-link-elisp-skip-confirm-regexp ""
"A regexp to skip confirmation for Elisp links."
:group 'org-link-follow
:version "24.1"
:type 'regexp)
(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)
(defcustom org-link-preview-delay 0.05
"Idle delay in seconds between link previews when using
`org-link-preview'. Links are previewed in batches (see
`org-link-preview-batch-size') spaced out by this delay. Set
this to a small number for more immediate previews, but at the
expense of higher lag."
:group 'org-link
:type 'number)
(defcustom org-link-preview-batch-size 6
"Number of links that are previewed at once with
`org-link-preview'. Links are previewed asynchronously, in
batches spaced out in time (see `org-link-preview-delay'). Set
this to a large integer for more immediate previews, but at the
expense of higher lag."
:group 'org-link
:type 'natnum)
(defcustom org-display-remote-inline-images 'skip
"How to display remote inline images.
Possible values of this option are:
skip Don't display remote images.
download Always download and display remote images.
t
cache Display remote images, and open them in separate buffers
for caching. Silently update the image buffer when a file
change is detected."
:group 'org-appearance
:package-version '(Org . "9.7")
:type '(choice
(const :tag "Ignore remote images" skip)
(const :tag "Always display remote images" download)
(const :tag "Display and silently update remote images" cache))
:safe #'symbolp)
(defcustom org-image-max-width 'fill-column
"When non-nil, limit the displayed image width.
This setting only takes effect when `org-image-actual-width' is set to
t or when #+ATTR* is set to t.
Possible values:
- `fill-column' :: limit width to `fill-column'
- `window' :: limit width to window width
- integer :: limit width to number in pixels
- float :: limit width to that fraction of window width
- nil :: do not limit image width"
:group 'org-appearance
:package-version '(Org . "9.7")
:type '(choice
(const :tag "Do not limit image width" nil)
(const :tag "Limit to `fill-column'" fill-column)
(const :tag "Limit to window width" window)
(integer :tag "Limit to a number of pixels")
(float :tag "Limit to a fraction of window width")))
(defcustom org-image-align 'left
"How to align images previewed using `org-link-preview-region'.
Only stand-alone image links are affected by this setting. These
are links without surrounding text.
Possible values of this option are:
left Insert image at specified position.
center Center image previews.
right Right-align image previews."
:group 'org-appearance
:package-version '(Org . "9.7")
:type '(choice
(const :tag "Left align (or don\\='t align) image previews" left)
(const :tag "Center image previews" center)
(const :tag "Right align image previews" right))
:safe #'symbolp)
;;; 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.")
(defconst org-target-link-regexp-limit (ash 2 12)
"Maximum allowed length of regexp.
The number should generally be ~order of magnitude smaller than
MAX_BUF_SIZE in src/regex-emacs.c. The number of regexp-emacs.c is
for processed regexp, which appears to be larger compared to the
original string length.")
(defvar-local org-target-link-regexps nil
"List of regular expressions matching radio targets in plain text.
This list is non-nil, when a single regexp would be too long to match
all the possible targets, exceeding Emacs's regexp length limit.")
(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.
Group 1 must contain the link type (i.e. https).
Group 2 must contain the link path (i.e. //example.com).
Used by `org-element-link-parser'.")
(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 `org-link-store-props' and set
`:description' property 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 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.")
(defvar-local org-link-preview-overlays nil)
;; Preserve when switching modes or when restarting Org.
;; If we clear the overlay list and later enable Or mode, the existing
;; image overlays will never be cleared by `org-link-preview'
;; and `org-link-preview-clear'.
(put 'org-link-preview-overlays 'permanent-local t)
(defvar-local org-link-preview--timer nil
"Timer for previewing Org links in buffer.
This timer creates previews for specs in
`org-link-preview--queue'.")
(defvar-local org-link-preview--queue nil
"Queue of pending previews for Org links in buffer.
Each element of this queue is a list of the form
(PREVIEW-FUNC OVERLAY PATH LINK)
where PREVIEW-FUNC places a preview of PATH using OVERLAY. LINK
is the Org element being previewed.")
;;; 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 (+ (ash 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-cycle-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 (org-element-type-p object 'radio-target)
(goto-char (org-element-begin object))
(org-fold-show-context 'link-search)
(throw :radio-match nil))))
(goto-char origin)
(user-error "No match for radio target: %s" target))))
(defun org-link--context-from-region ()
"Return context string from active region, or nil."
(when (org-region-active-p)
(let ((context (buffer-substring (region-beginning) (region-end))))
(when (and (wholenump org-link-context-for-files)
(> org-link-context-for-files 0))
(let ((lines (org-split-string context "\n")))
(setq context
(mapconcat #'identity
(cl-subseq lines 0 org-link-context-for-files)
"\n"))))
context)))
(defun org-link--normalize-string (string &optional context)
"Remove ignored contents from STRING string and return it.
This function removes contiguous white spaces and statistics
cookies. When optional argument CONTEXT is non-nil, it assumes
STRING is a context string, and also removes special search
syntax around the string."
(let ((string
(org-trim
(replace-regexp-in-string
(rx (one-or-more (any " \t")))
" "
(replace-regexp-in-string
;; Statistics cookie regexp.
(rx (seq "[" (0+ digit) (or "%" (seq "/" (0+ digit))) "]"))
" "
string)))))
(when context
(while (cond ((and (string-prefix-p "(" string)
(string-suffix-p ")" string))
(setq string (org-trim (substring string 1 -1))))
((string-match "\\`[#*]+[ \t]*" string)
(setq string (substring string (match-end 0))))
(t nil))))
string))
(defun org-link--reveal-maybe (region _)
"Reveal folded link in REGION when needed.
This function is intended to be used as :fragile property of a folding
spec."
(org-with-point-at (car region)
(not (org-in-regexp org-link-any-re))))
(defun org-link--try-link-store-functions (interactive?)
"Try storing external links, prompting if more than one is possible.
Each function returned by `org-store-link-functions' is called in
turn. If multiple functions return non-nil, prompt for which
link should be stored.
Argument INTERACTIVE? indicates whether `org-store-link' was
called interactively and is passed to the link store functions.
Return t when a link has been stored in `org-link-store-props'."
(let ((results-alist nil))
(dolist (f (org-store-link-functions))
(when (condition-case nil
(funcall f interactive?)
;; FIXME: The store function used (< Org 9.7) to accept
;; no arguments; provide backward compatibility support
;; for them.
(wrong-number-of-arguments
(funcall f)))
;; FIXME: return value is not link's plist, so we store the
;; new value before it is modified. It would be cleaner to
;; ask store link functions to return the plist instead.
(push (cons f (copy-sequence org-store-link-plist))
results-alist)))
(pcase results-alist
(`nil nil)
(`((,_ . ,_)) t) ;single choice: nothing to do
(`((,name . ,_) . ,_)
;; Reinstate link plist associated to the chosen
;; function.
(apply #'org-link-store-props
(cdr (assoc-string
(completing-read
(format "Store link with (default %s): " name)
(mapcar #'car results-alist)
nil t nil nil (symbol-name name))
results-alist)))
t))))
(defun org-link--add-to-stored-links (link desc)
"Add LINK to `org-stored-links' with description DESC."
(cond
((not (member (list link desc) org-stored-links))
(push (list link desc) org-stored-links)
(message "Stored: %s" (or desc link)))
((equal (list link desc) (car org-stored-links))
(message "This link has already been stored"))
(t
(setq org-stored-links
(delete (list link desc) org-stored-links))
(push (list link desc) org-stored-links)
(message "Link moved to front: %s" (or desc link)))))
(defun org-link--file-link-to-here ()
"Return as (LINK . DESC) a file link with search string to here."
(let ((link (concat "file:"
(abbreviate-file-name
(buffer-file-name (buffer-base-buffer)))))
desc)
(when org-link-context-for-files
(pcase (org-link-precise-link-target)
(`nil nil)
(`(,search-string ,search-desc ,_position)
(setq link (format "%s::%s" link search-string))
(setq desc search-desc))))
(cons link desc)))
(defun org-link-preview--get-overlays (&optional beg end)
"Return link preview overlays between BEG and END."