On Thu, Aug 17, 2017 at 3:25 PM, Matt Price <[email protected]> wrote:
> I'd love to be able generate dates dynamically using the {{{n}}} org
> macro, or some other mechanism. I don't immediately see how that would be
> possible but maybe someone can guide me. I'd want to do something
> equivalent to this pseudo-elisp:
>
> (let ((base-date 2017-09-05))
> (+ base-date (* 7 {{{n}}}))
>
> I haven't looked into how date objects are parsed in org-mode, though, so
> I have no idea how hard it would be to actually implement something like
> this.
>
I made some progress on this (but not much).
I defined a simple macro that adds times together and creates a timestamp
that org can read -- in fact, this one adds some text as well:
#+MACRO: w (eval (format-time-string "Week {{{n(week)}}} (<%Y-%m-%d %a>)"
(time-add (encode-time 0 0 0 17 9 2017) (days-to-time (* 7 1)))) )
This does everything that I want *except* dynamically adding time to the
previous macro call. I tried defining a dynamic version:
#+MACRO: w (eval (format-time-string "Week {{{n(week)}}} (<%Y-%m-%d %a>)"
(time-add (encode-time 0 0 0 17 9 2017) (days-to-time (* 7 $1)))) ))
And then calling it with
{{{w({{{n}}})}}}
But unsurprisingly and appropriately, that didn't work.
I also took a look at the patch Nicolas used to implement the {{{n}}} macro
(I've reattached it here for convenience only!). It defines
`org-macro--counter-initialize` and calls it from inside
`org-macro-templates-initialize`. I guess I could copy that strategy but
then I'd be maintaining my own copy of org-macro-templates-initialize,
which seems like a terrible idea.
So, I'm not sure how best to proceed. For my specific use-case, something
like this would be a huge timesaver when multiplied over semesters/years.
But I also wonder whether maybe other people would enjoy being able to do
date arithmetic inside org files (and outside of tables -- I know from
Sacha's 2015 blog post that this is possible inside a table --
http://sachachua.com/blog/2015/06/using-your-own-emacs-lisp-functions-in-org-mode-table-calculations-easier-dosage-totals/).
If other people would also use such code, I could try to hack something
together for submission. Generalizable functions will be hard for me to
write because I am sometimes a bit dense. I would love to hear suggestions
from the group...
> Thank you everyone!
>
^^ this still applies!
Matt
From 980b713f28596c7f6486dc1ccfa82f76de7c963d Mon Sep 17 00:00:00 2001
From: Nicolas Goaziou <[email protected]>
Date: Mon, 8 May 2017 12:38:38 +0200
Subject: [PATCH] org-macro: Implement the "n" macro
* lisp/org-macro.el (org-macro--counter-table): New variable.
(org-macro--counter-initialize):
(org-macro--counter-increment): New functions.
(org-macro-initialize-templates): Use new functions.
* doc/org.texi (Macro replacement): Document new macro.
* testing/lisp/test-org-macro.el (test-org-macro/n):
(test-org-macro/property): New tests.
---
etc/ORG-NEWS | 3 ++
lisp/org-macro.el | 38 +++++++++++++--
testing/lisp/test-org-macro.el | 102 +++++++++++++++++++++++++++++++++++------
3 files changed, 127 insertions(+), 16 deletions(-)
diff --git a/etc/ORG-NEWS b/etc/ORG-NEWS
index 3ca5b0553..b6110c412 100644
--- a/etc/ORG-NEWS
+++ b/etc/ORG-NEWS
@@ -197,6 +197,9 @@ contents, are now supported.
This new function is meant to be used in back-ends supporting images
as descriptions of links, a.k.a. image links. See its docstring for
details.
+**** New macro : ~{{{n}}}~
+This macro creates and increment multiple counters in a document. See
+manual for details.
**** Add global macros through ~org-export-global-macros~
With this variable, one can define macros available for all documents.
**** New keyword ~#+EXPORT_FILE_NAME~
diff --git a/lisp/org-macro.el b/lisp/org-macro.el
index 71e917b71..f5ddb92e4 100644
--- a/lisp/org-macro.el
+++ b/lisp/org-macro.el
@@ -36,8 +36,11 @@
;; Along with macros defined through #+MACRO: keyword, default
;; templates include the following hard-coded macros:
-;; {{{time(format-string)}}}, {{{property(node-property)}}},
-;; {{{input-file}}} and {{{modification-time(format-string)}}}.
+;; {{{time(format-string)}}},
+;; {{{property(node-property)}}},
+;; {{{input-file}}},
+;; {{{modification-time(format-string)}}},
+;; {{{n(counter,reset}}}.
;; Upon exporting, "ox.el" will also provide {{{author}}}, {{{date}}},
;; {{{email}}} and {{{title}}} macros.
@@ -129,7 +132,7 @@ function installs the following ones: \"property\",
(let ((old-template (assoc (car cell) templates)))
(if old-template (setcdr old-template (cdr cell))
(push cell templates))))))
- ;; Install hard-coded macros.
+ ;; Install "property", "time" macros.
(mapc update-templates
(list (cons "property"
"(eval (save-excursion
@@ -143,6 +146,7 @@ function installs the following ones: \"property\",
l)))))
(org-entry-get nil \"$1\" 'selective)))")
(cons "time" "(eval (format-time-string \"$1\"))")))
+ ;; Install "input-file", "modification-time" macros.
(let ((visited-file (buffer-file-name (buffer-base-buffer))))
(when (and visited-file (file-exists-p visited-file))
(mapc update-templates
@@ -152,6 +156,10 @@ function installs the following ones: \"property\",
(prin1-to-string visited-file)
(prin1-to-string
(nth 5 (file-attributes visited-file)))))))))
+ ;; Initialize and install "n" macro.
+ (org-macro--counter-initialize)
+ (funcall update-templates
+ (cons "n" "(eval (org-macro--counter-increment \"$1\" \"$2\"))"))
(setq org-macro-templates templates)))
(defun org-macro-expand (macro templates)
@@ -280,6 +288,9 @@ Return a list of arguments, as strings. This is the opposite of
s nil t)
"\000"))
+
+;;; Helper functions and variables for internal macros
+
(defun org-macro--vc-modified-time (file)
(save-window-excursion
(when (vc-backend file)
@@ -304,6 +315,27 @@ Return a list of arguments, as strings. This is the opposite of
(kill-buffer buf))
date))))
+(defvar org-macro--counter-table nil
+ "Hash table containing counter value per name.")
+
+(defun org-macro--counter-initialize ()
+ "Initialize `org-macro--counter-table'."
+ (setq org-macro--counter-table (make-hash-table :test #'equal)))
+
+(defun org-macro--counter-increment (name &optional reset)
+ "Increment counter NAME.
+NAME is a string identifying the counter. If optional argument
+RESET is a non-empty string, reset the counter instead."
+ (if (org-string-nw-p reset)
+ (let ((new-value (if (string-match-p "\\`[ \t]*[0-9]+[ \t]*\\'" reset)
+ (string-to-number reset)
+ 1)))
+ (puthash name new-value org-macro--counter-table))
+ (let ((value (gethash name org-macro--counter-table)))
+ (puthash name
+ (if (null value) 1 (1+ value))
+ org-macro--counter-table))))
+
(provide 'org-macro)
;;; org-macro.el ends here
diff --git a/testing/lisp/test-org-macro.el b/testing/lisp/test-org-macro.el
index 26c56745c..64b0a97cc 100644
--- a/testing/lisp/test-org-macro.el
+++ b/testing/lisp/test-org-macro.el
@@ -75,9 +75,22 @@
(org-macro-initialize-templates)
(org-macro-replace-all org-macro-templates)
(buffer-string))))
- ;; Test special "property" macro. With only one argument, retrieve
- ;; property from current headline. Otherwise, the second argument
- ;; is a search option to get the property from another headline.
+ ;; Macro expansion ignores narrowing.
+ (should
+ (string-match
+ "expansion"
+ (org-test-with-temp-text
+ "#+MACRO: macro expansion\n{{{macro}}}\n<point>Contents"
+ (narrow-to-region (point) (point-max))
+ (org-macro-initialize-templates)
+ (org-macro-replace-all org-macro-templates)
+ (org-with-wide-buffer (buffer-string))))))
+
+(ert-deftest test-org-macro/property ()
+ "Test {{{property}}} macro."
+ ;; With only one argument, retrieve property from current headline.
+ ;; Otherwise, the second argument is a search option to get the
+ ;; property from another headline.
(should
(equal "1"
(org-test-with-temp-text
@@ -107,17 +120,80 @@
(org-test-with-temp-text
"* H1\n:PROPERTIES:\n:A: 1\n:END:\n* H2\n{{{property(A,*???)}}}<point>"
(org-macro-initialize-templates)
- (org-macro-replace-all org-macro-templates)))
- ;; Macro expansion ignores narrowing.
+ (org-macro-replace-all org-macro-templates))))
+
+(ert-deftest test-org-macro/n ()
+ "Test {{{n}}} macro."
+ ;; Standard test with default counter.
(should
- (string-match
- "expansion"
- (org-test-with-temp-text
- "#+MACRO: macro expansion\n{{{macro}}}\n<point>Contents"
- (narrow-to-region (point) (point-max))
- (org-macro-initialize-templates)
- (org-macro-replace-all org-macro-templates)
- (org-with-wide-buffer (buffer-string))))))
+ (equal "1 2"
+ (org-test-with-temp-text "{{{n}}} {{{n}}}"
+ (org-macro-initialize-templates)
+ (org-macro-replace-all org-macro-templates)
+ (buffer-substring-no-properties
+ (line-beginning-position) (line-end-position)))))
+ (should
+ (equal "1 2"
+ (org-test-with-temp-text "{{{n()}}} {{{n}}}"
+ (org-macro-initialize-templates)
+ (org-macro-replace-all org-macro-templates)
+ (buffer-substring-no-properties
+ (line-beginning-position) (line-end-position)))))
+ ;; Test alternative counters.
+ (should
+ (equal "1 1 1 2"
+ (org-test-with-temp-text "{{{n}}} {{{n(c1)}}} {{{n(c2)}}} {{{n(c1)}}}"
+ (org-macro-initialize-templates)
+ (org-macro-replace-all org-macro-templates)
+ (buffer-substring-no-properties
+ (line-beginning-position) (line-end-position)))))
+ ;; Second argument set a counter to a given value. A non-numeric
+ ;; value resets the counter to 1.
+ (should
+ (equal "9 10"
+ (org-test-with-temp-text "{{{n(c,9)}}} {{{n(c)}}}"
+ (org-macro-initialize-templates)
+ (org-macro-replace-all org-macro-templates)
+ (buffer-substring-no-properties
+ (line-beginning-position) (line-end-position)))))
+ (should
+ (equal "9 1"
+ (org-test-with-temp-text "{{{n(c,9)}}} {{{n(c,reset)}}}"
+ (org-macro-initialize-templates)
+ (org-macro-replace-all org-macro-templates)
+ (buffer-substring-no-properties
+ (line-beginning-position) (line-end-position)))))
+ ;; Tolerate spaces in second argument.
+ (should
+ (equal "9 10"
+ (org-test-with-temp-text "{{{n(c, 9)}}} {{{n(c)}}}"
+ (org-macro-initialize-templates)
+ (org-macro-replace-all org-macro-templates)
+ (buffer-substring-no-properties
+ (line-beginning-position) (line-end-position)))))
+ (should
+ (equal "9 1"
+ (org-test-with-temp-text "{{{n(c,9)}}} {{{n(c, reset)}}}"
+ (org-macro-initialize-templates)
+ (org-macro-replace-all org-macro-templates)
+ (buffer-substring-no-properties
+ (line-beginning-position) (line-end-position)))))
+ ;; Second argument also applies to default counter.
+ (should
+ (equal "9 10 1"
+ (org-test-with-temp-text "{{{n(,9)}}} {{{n}}} {{{n(,reset)}}}"
+ (org-macro-initialize-templates)
+ (org-macro-replace-all org-macro-templates)
+ (buffer-substring-no-properties
+ (line-beginning-position) (line-end-position)))))
+ ;; An empty second argument is equivalent to no argument.
+ (should
+ (equal "2 3"
+ (org-test-with-temp-text "{{{n(c,2)}}} {{{n(c,)}}}"
+ (org-macro-initialize-templates)
+ (org-macro-replace-all org-macro-templates)
+ (buffer-substring-no-properties
+ (line-beginning-position) (line-end-position))))))
(ert-deftest test-org-macro/escape-arguments ()
"Test `org-macro-escape-arguments' specifications."
--
2.13.0
