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Re: [O] [patch, koma-letter] Change of subject behavior

From: Rasmus
Subject: Re: [O] [patch, koma-letter] Change of subject behavior
Date: Tue, 17 Mar 2015 23:48:31 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)

Nicolas Goaziou <address@hidden> writes:

> However, I don't think :opening setting belongs to
> `org-koma-letter-headline', as it means it is potentially set each time
> a headline is being processed.

The property is at most set once cf. the second clause.

> The (when ...) could be moved within `org-koma-letter-template', where
> "\opening{...}" is filled and the first headline without a special tag
> in the parse tree could be used (assuming there's no special
> keyword...). That headline can be found using `org-element-map'.

Yes.  Less ugly.

> Another (smallish) advantage is that the following case would be
> allowed:
>   ***** Dear myself,
>   * Part 1

Is the advantage that it won't fold?


The current stuff is ugly.  I didn't know much lisp when I worked on

I updated the patch.  Perhaps the loop determination shod be moved to a
separate function to keep the template clean.  I thinking this cause we
(or at least I) sometimes point to ox-koma-letter as an example of a
derived backend.  WDTY on that?

In the attached at least this work as expected.

*** ps                                                                 :ps:
*** dear you,
* part 1


Send from my Emacs
>From dacee19cce07a75735298dcb3f3730d6220248c5 Mon Sep 17 00:00:00 2001
From: Rasmus <address@hidden>
Date: Tue, 17 Mar 2015 18:32:26 +0100
Subject: [PATCH] ox-koma-letter: Stricter subject inference

* ox-koma-letter.el (org-koma-letter-headline): Remove opening guessing.
  (org-koma-letter-template): Directly infer subject from first
  non-special headline.
 contrib/lisp/ox-koma-letter.el | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/contrib/lisp/ox-koma-letter.el b/contrib/lisp/ox-koma-letter.el
index 1b5dd17..59616c7 100644
--- a/contrib/lisp/ox-koma-letter.el
+++ b/contrib/lisp/ox-koma-letter.el
@@ -412,6 +412,7 @@ was not present."
     (:with-place nil "place" org-koma-letter-use-place)
     (:with-subject nil "subject" org-koma-letter-subject-format)
     (:with-title-as-subject nil "title-subject" org-koma-letter-prefer-subject)
+    (:with-headline-opening nil nil org-koma-letter-headline-is-opening-maybe)
     ;; Special properties non-nil when a setting happened in buffer.
     ;; They are used to prioritize in-buffer settings over "lco"
     ;; files.  See `org-koma-letter-template'.
@@ -559,11 +560,6 @@ appropriate place."
                  tag (mapcar #'symbol-name (plist-get info :special-tags)))
                 ;; Store association for later use and bail out.
                 (push (cons tag contents) org-koma-letter-special-contents)))
-    ;; Opening is not defined yet: use headline's title.
-    (when (and org-koma-letter-headline-is-opening-maybe
-              (not (org-string-nw-p (plist-get info :opening))))
-      (plist-put info :opening
-                (org-export-data (org-element-property :title headline) info)))
     ;; In any case, insert contents in letter's body.
@@ -641,7 +637,21 @@ holding export options."
    (format "\\begin{letter}{%%\n%s}\n\n"
           (org-koma-letter--determine-to-and-from info 'to))
    ;; Opening.
-   (format "\\opening{%s}\n\n" (plist-get info :opening))
+   (format "\\opening{%s}\n\n"
+          (org-export-data
+           (or (org-string-nw-p (plist-get info :opening))
+               (if (plist-get info :with-headline-opening)
+                   (let ((special-tags (plist-get info :special-tags)))
+                       (org-element-map (org-element-parse-buffer) 'headline
+                         (lambda (head)
+                           (unless
+                               (org-some 'identity
+                                         (mapcar (lambda (tag) (memq (intern 
tag) special-tags))
+                                                 (org-element-property :tags 
+                             (org-element-property :title head)))
+                         info t)))
+               "")
+           info))
    ;; Letter body.
    ;; Closing.

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