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Mateus Pinto Rodrigues
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elpa/org-20171204/ob-table.el
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153
elpa/org-20171204/ob-table.el
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;;; ob-table.el --- Support for Calling Babel Functions from Tables -*- lexical-binding: t; -*-
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;; Copyright (C) 2009-2017 Free Software Foundation, Inc.
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;; Author: Eric Schulte
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;; Keywords: literate programming, reproducible research
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;; Homepage: http://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Should allow calling functions from Org tables using the function
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;; `org-sbe' as so...
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;; #+begin_src emacs-lisp :results silent
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;; (defun fibbd (n) (if (< n 2) 1 (+ (fibbd (- n 1)) (fibbd (- n 2)))))
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;; #+end_src
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;; #+name: fibbd
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;; #+begin_src emacs-lisp :var n=2 :results silent
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;; (fibbd n)
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;; #+end_src
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;; | original | fibbd |
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;; |----------+--------|
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;; | 0 | |
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;; | 1 | |
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;; | 2 | |
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;; | 3 | |
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;; | 4 | |
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;; | 5 | |
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;; | 6 | |
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;; | 7 | |
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;; | 8 | |
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;; | 9 | |
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;; #+TBLFM: $2='(org-sbe "fibbd" (n $1))
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;; NOTE: The quotation marks around the function name, 'fibbd' here,
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;; are optional.
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;;; Code:
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(require 'ob-core)
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(declare-function org-trim "org" (s &optional keep-lead))
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(defun org-babel-table-truncate-at-newline (string)
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"Replace newline character with ellipses.
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If STRING ends in a newline character, then remove the newline
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character and replace it with ellipses."
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(if (and (stringp string) (string-match "[\n\r]\\(.\\)?" string))
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(concat (substring string 0 (match-beginning 0))
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(when (match-string 1 string) "...")) string))
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(defmacro org-sbe (source-block &rest variables)
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"Return the results of calling SOURCE-BLOCK with VARIABLES.
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Each element of VARIABLES should be a list of two elements: the
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first element is the name of the variable and second element is a
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string of its value.
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So this `org-sbe' construct
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(org-sbe \"source-block\" (n $2) (m 3))
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is the equivalent of the following source code block:
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#+begin_src emacs-lisp :var results=source-block(n=val_at_col_2, m=3) :results silent
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results
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#+end_src
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NOTE: The quotation marks around the function name,
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'source-block', are optional.
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NOTE: By default, string variable names are interpreted as
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references to source-code blocks, to force interpretation of a
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cell's value as a string, prefix the identifier a \"$\" (e.g.,
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\"$$2\" instead of \"$2\" or \"$@2$2\" instead of \"@2$2\").
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NOTE: It is also possible to pass header arguments to the code
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block. In this case a table cell should hold the string value of
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the header argument which can then be passed before all variables
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as shown in the example below.
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| 1 | 2 | :file nothing.png | nothing.png |
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#+TBLFM: @1$4=\\='(org-sbe test-sbe $3 (x $1) (y $2))"
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(declare (debug (form form)))
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(let* ((header-args (if (stringp (car variables)) (car variables) ""))
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(variables (if (stringp (car variables)) (cdr variables) variables)))
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(let* (quote
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(variables
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(mapcar
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(lambda (var)
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;; ensure that all cells prefixed with $'s are strings
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(cons (car var)
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(delq nil (mapcar
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(lambda (el)
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(if (eq '$ el)
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(prog1 nil (setq quote t))
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(prog1
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(cond
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(quote (format "\"%s\"" el))
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((stringp el) (org-no-properties el))
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(t el))
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(setq quote nil))))
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(cdr var)))))
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variables)))
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(unless (stringp source-block)
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(setq source-block (symbol-name source-block)))
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(let ((result
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(if (and source-block (> (length source-block) 0))
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(let ((params
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;; FIXME: Why `eval'?!?!?
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(eval `(org-babel-parse-header-arguments
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(concat
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":var results="
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,source-block
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"[" ,header-args "]"
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"("
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(mapconcat
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(lambda (var-spec)
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(if (> (length (cdr var-spec)) 1)
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(format "%S='%S"
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(car var-spec)
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(mapcar #'read (cdr var-spec)))
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(format "%S=%s"
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(car var-spec) (cadr var-spec))))
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',variables ", ")
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")")))))
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(org-babel-execute-src-block
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nil (list "emacs-lisp" "results" params)
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'((:results . "silent"))))
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"")))
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(org-trim (if (stringp result) result (format "%S" result)))))))
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(provide 'ob-table)
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;;; ob-table.el ends here
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