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authormattkae <mattkae@protonmail.com>2022-06-07 08:23:47 -0400
committermattkae <mattkae@protonmail.com>2022-06-07 08:23:47 -0400
commitbd18a38c2898548a3664a9ddab9f79c84f2caf4a (patch)
tree95b9933376770381bd8859782ae763be81c2d72b /elpa/org-9.5.2/ob-ref.el
parentb07628dddf418d4f47b858e6c35fd3520fbaeed2 (diff)
parentef160dea332af4b4fe5e2717b962936c67e5fe9e (diff)
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-;;; ob-ref.el --- Babel Functions for Referencing External Data -*- lexical-binding: t; -*-
-
-;; Copyright (C) 2009-2021 Free Software Foundation, Inc.
-
-;; Authors: Eric Schulte
-;; Dan Davison
-;; Keywords: literate programming, reproducible research
-;; 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:
-
-;; Functions for referencing data from the header arguments of a
-;; org-babel block. The syntax of such a reference should be
-
-;; #+VAR: variable-name=file:resource-id
-
-;; - variable-name :: the name of the variable to which the value
-;; will be assigned
-
-;; - file :: path to the file containing the resource, or omitted if
-;; resource is in the current file
-
-;; - resource-id :: the id or name of the resource
-
-;; So an example of a simple source block referencing table data in
-;; the same file would be
-
-;; #+NAME: sandbox
-;; | 1 | 2 | 3 |
-;; | 4 | org-babel | 6 |
-;;
-;; #+begin_src emacs-lisp :var table=sandbox
-;; (message table)
-;; #+end_src
-
-;;; Code:
-(require 'ob-core)
-(require 'org-macs)
-(require 'cl-lib)
-
-(declare-function org-babel-lob-get-info "ob-lob" (&optional datum))
-(declare-function org-element-at-point "org-element" ())
-(declare-function org-element-property "org-element" (property element))
-(declare-function org-element-type "org-element" (element))
-(declare-function org-end-of-meta-data "org" (&optional full))
-(declare-function org-find-property "org" (property &optional value))
-(declare-function org-id-find-id-file "org-id" (id))
-(declare-function org-id-find-id-in-file "org-id" (id file &optional markerp))
-(declare-function org-in-commented-heading-p "org" (&optional no-inheritance))
-(declare-function org-narrow-to-subtree "org" ())
-(declare-function org-show-context "org" (&optional key))
-
-(defvar org-babel-update-intermediate nil
- "Update the in-buffer results of code blocks executed to resolve references.")
-
-(defun org-babel-ref-parse (assignment)
- "Parse a variable ASSIGNMENT in a header argument.
-
-If the right hand side of the assignment has a literal value
-return that value, otherwise interpret it as a reference to an
-external resource and find its value using `org-babel-ref-resolve'.
-
-Return a list with two elements: the name of the variable, and an
-Emacs Lisp representation of the value of the variable."
- (when (string-match "\\(.+?\\)=" assignment)
- (let ((var (org-trim (match-string 1 assignment)))
- (ref (org-trim (substring assignment (match-end 0)))))
- (cons (intern var)
- (let ((out (save-excursion
- (when org-babel-current-src-block-location
- (goto-char (if (markerp org-babel-current-src-block-location)
- (marker-position org-babel-current-src-block-location)
- org-babel-current-src-block-location)))
- (org-babel-read ref))))
- (if (equal out ref)
- (if (and (string-prefix-p "\"" ref)
- (string-suffix-p "\"" ref))
- (read ref)
- (org-babel-ref-resolve ref))
- out))))))
-
-(defun org-babel-ref-goto-headline-id (id)
- (or (let ((h (org-find-property "CUSTOM_ID" id)))
- (when h (goto-char h)))
- (let* ((file (org-id-find-id-file id))
- (m (when file (org-id-find-id-in-file id file 'marker))))
- (when (and file m)
- (message "file:%S" file)
- (pop-to-buffer-same-window (marker-buffer m))
- (goto-char m)
- (move-marker m nil)
- (org-show-context)
- t))))
-
-(defun org-babel-ref-headline-body ()
- (save-restriction
- (org-narrow-to-subtree)
- (buffer-substring
- (save-excursion (goto-char (point-min))
- (org-end-of-meta-data)
- (point))
- (point-max))))
-
-(defvar org-babel-library-of-babel)
-(defun org-babel-ref-resolve (ref)
- "Resolve the reference REF and return its value."
- (save-window-excursion
- (with-current-buffer (or org-babel-exp-reference-buffer (current-buffer))
- (save-excursion
- (let ((case-fold-search t)
- args new-refere new-header-args new-referent split-file split-ref
- index)
- ;; if ref is indexed grab the indices -- beware nested indices
- (when (and (string-match "\\[\\([^\\[]+\\)\\]$" ref)
- (let ((str (substring ref 0 (match-beginning 0))))
- (= (cl-count ?\( str) (cl-count ?\) str))))
- (setq index (match-string 1 ref))
- (setq ref (substring ref 0 (match-beginning 0))))
- ;; assign any arguments to pass to source block
- (when (string-match
- "^\\(.+?\\)\\(\\[\\(.*\\)\\]\\|\\(\\)\\)(\\(.*\\))$" ref)
- (setq new-refere (match-string 1 ref))
- (setq new-header-args (match-string 3 ref))
- (setq new-referent (match-string 5 ref))
- (when (> (length new-refere) 0)
- (when (> (length new-referent) 0)
- (setq args (mapcar (lambda (ref) (cons :var ref))
- (org-babel-ref-split-args new-referent))))
- (when (> (length new-header-args) 0)
- (setq args (append (org-babel-parse-header-arguments
- new-header-args)
- args)))
- (setq ref new-refere)))
- (when (string-match "^\\(.+\\):\\(.+\\)$" ref)
- (setq split-file (match-string 1 ref))
- (setq split-ref (match-string 2 ref))
- (find-file split-file)
- (setq ref split-ref))
- (org-with-wide-buffer
- (goto-char (point-min))
- (let* ((params (append args '((:results . "silent"))))
- (regexp (org-babel-named-data-regexp-for-name ref))
- (result
- (catch :found
- ;; Check for code blocks or named data.
- (while (re-search-forward regexp nil t)
- ;; Ignore COMMENTed headings and orphaned
- ;; affiliated keywords.
- (unless (org-in-commented-heading-p)
- (let ((e (org-element-at-point)))
- (when (equal (org-element-property :name e) ref)
- (goto-char
- (org-element-property :post-affiliated e))
- (pcase (org-element-type e)
- (`babel-call
- (throw :found
- (org-babel-execute-src-block
- nil (org-babel-lob-get-info e) params)))
- (`src-block
- (throw :found
- (org-babel-execute-src-block
- nil nil
- (and
- (not org-babel-update-intermediate)
- params))))
- ((and (let v (org-babel-read-element e))
- (guard v))
- (throw :found v))
- (_ (error "Reference not found")))))))
- ;; Check for local or global headlines by ID.
- (when (org-babel-ref-goto-headline-id ref)
- (throw :found (org-babel-ref-headline-body)))
- ;; Check the Library of Babel.
- (let ((info (cdr (assq (intern ref)
- org-babel-library-of-babel))))
- (when info
- (throw :found
- (org-babel-execute-src-block nil info params))))
- (error "Reference `%s' not found in this buffer" ref))))
- (cond
- ((symbolp result) (format "%S" result))
- ((and index (listp result))
- (org-babel-ref-index-list index result))
- (t result)))))))))
-
-(defun org-babel-ref-index-list (index lis)
- "Return the subset of LIS indexed by INDEX.
-
-Indices are 0 based and negative indices count from the end of
-LIS, so 0 references the first element of LIS and -1 references
-the last. If INDEX is separated by \",\"s then each \"portion\"
-is assumed to index into the next deepest nesting or dimension.
-
-A valid \"portion\" can consist of either an integer index, two
-integers separated by a \":\" in which case the entire range is
-returned, or an empty string or \"*\" both of which are
-interpreted to mean the entire range and as such are equivalent
-to \"0:-1\"."
- (if (and (> (length index) 0) (string-match "^\\([^,]*\\),?" index))
- (let* ((ind-re "\\(\\([-[:digit:]]+\\):\\([-[:digit:]]+\\)\\|\\*\\)")
- (lgth (length lis))
- (portion (match-string 1 index))
- (remainder (substring index (match-end 0)))
- (wrap (lambda (num) (if (< num 0) (+ lgth num) num)))
- (open (lambda (ls) (if (and (listp ls) (= (length ls) 1)) (car ls) ls))))
- (funcall
- open
- (mapcar
- (lambda (sub-lis)
- (if (listp sub-lis)
- (org-babel-ref-index-list remainder sub-lis)
- sub-lis))
- (if (or (= 0 (length portion)) (string-match ind-re portion))
- (mapcar
- (lambda (n) (nth n lis))
- (apply 'org-number-sequence
- (if (and (> (length portion) 0) (match-string 2 portion))
- (list
- (funcall wrap (string-to-number (match-string 2 portion)))
- (funcall wrap (string-to-number (match-string 3 portion))))
- (list (funcall wrap 0) (funcall wrap -1)))))
- (list (nth (funcall wrap (string-to-number portion)) lis))))))
- lis))
-
-(defun org-babel-ref-split-args (arg-string)
- "Split ARG-STRING into top-level arguments of balanced parenthesis."
- (mapcar #'org-trim (org-babel-balanced-split arg-string 44)))
-
-(provide 'ob-ref)
-
-;;; ob-ref.el ends here