From: Eric Schulte <schulte.eric@gmail.com>
To: Nicolas Goaziou <n.goaziou@gmail.com>
Cc: Org Mode Mailing List <emacs-orgmode@gnu.org>
Subject: Re: having problems exporting to Beamer
Date: Sun, 14 Apr 2013 11:08:12 -0600 [thread overview]
Message-ID: <87vc7pdoox.fsf@gmail.com> (raw)
In-Reply-To: 871uada6t2.fsf@gmail.com
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Nicolas Goaziou <n.goaziou@gmail.com> writes:
> Hello,
>
> Eric Schulte <schulte.eric@gmail.com> writes:
>
>> When I attempt to export a .org file to Beamer (with "C-c C-e l b" after
>> requiring ox-beamer) I get the following error [1]. From the info page
>> (info "(org)Beamer export") it looks like I shouldn't have to do any
>> special buffer preparation.
>>
>> What am I doing wrong?
>
> It looks like `org-beamer-outline-frame-options' is nil, but it must be
> a string (possibly empty).
>
Thanks, with this variable set to an empty string I am making it further
in the export process. I would suggest that either the initial value of
this variable be set to an empty string, or a nil value should be
handled gracefully.
After fixing the above I reached a new error. There was no "beamer"
class defined in my `org-latex-classes'. The attached patch ensures
that when ox-beamer is loaded a beamer entry is added to
`org-latex-classes' if none already exists.
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: 0001-ensure-a-beamer-entry-exists-in-org-latex-classes.patch --]
[-- Type: text/x-patch, Size: 1363 bytes --]
From 540bcddb50b746f4f2de910a199e4d13e8ddad11 Mon Sep 17 00:00:00 2001
From: Eric Schulte <schulte.eric@gmail.com>
Date: Sun, 14 Apr 2013 09:16:24 -0600
Subject: [PATCH 1/2] ensure a "beamer" entry exists in org-latex-classes
This ensures that whenever ox-beamer is required it is possible to
export to beamer. Otherwise it is required to find the
org-latex-classes variable and add a beamer entry, something which is
not mentioned in the beamer page of the manual and will be confusing to
users just getting going with Beamer export.
* lisp/ox-beamer.el (assoc): Ensure a "beamer" entry exists in
org-latex-classes.
---
lisp/ox-beamer.el | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/lisp/ox-beamer.el b/lisp/ox-beamer.el
index 63dad5c..87458f0 100644
--- a/lisp/ox-beamer.el
+++ b/lisp/ox-beamer.el
@@ -126,6 +126,15 @@
:group 'org-export
:version "24.2")
+(unless (assoc "beamer" org-latex-classes)
+ (add-to-list 'org-latex-classes
+ '("article" "\\documentclass[bigger]{beamer}"
+ ("\\section{%s}" . "\\section*{%s}")
+ ("\\subsection{%s}" . "\\subsection*{%s}")
+ ("\\subsubsection{%s}" . "\\subsubsection*{%s}")
+ ("\\paragraph{%s}" . "\\paragraph*{%s}")
+ ("\\subparagraph{%s}" . "\\subparagraph*{%s}"))))
+
(defcustom org-beamer-frame-level 1
"The level at which headlines become frames.
--
1.8.2.1
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I leave it to you to apply or not, but I think it makes things much
clearer for new users. I think this patch is especially useful because
it is no longer required to place
#+LaTeX_Class: beamer
at the top of the Org-mode file for beamer export. At least the
"beamer" class and `org-latex-classes' should be mentioned in the beamer
section of the manual.
Additionally, I ran into another nil vs. empty string problem, which was
fixed by the second patch attached.
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[-- Attachment #4: 0002-Ensure-nil-is-not-passed-to-regexp-function.patch --]
[-- Type: text/x-patch, Size: 926 bytes --]
From ae7f4de7a04c9fac9fa36836370711cdb7f12fa7 Mon Sep 17 00:00:00 2001
From: Eric Schulte <schulte.eric@gmail.com>
Date: Sun, 14 Apr 2013 10:28:27 -0600
Subject: [PATCH 2/2] Ensure nil is not passed to regexp function
* lisp/ox-beamer.el (org-beamer--format-frame): If contents is nil, then
replace it with an empty string.
---
lisp/ox-beamer.el | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lisp/ox-beamer.el b/lisp/ox-beamer.el
index 87458f0..d1cfbfd 100644
--- a/lisp/ox-beamer.el
+++ b/lisp/ox-beamer.el
@@ -513,7 +513,7 @@ used as a communication channel."
;; remove the first word from the contents in the PDF
;; output.
(if (not fragilep) contents
- (replace-regexp-in-string "\\`\n*" "\\& " contents))
+ (replace-regexp-in-string "\\`\n*" "\\& " (or contents "")))
"\\end{frame}")))
(defun org-beamer--format-block (headline contents info)
--
1.8.2.1
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Finally, I ran into a third and even more minor problem. Illustrated by
the following example.
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[-- Attachment #6: beamer-example.org --]
[-- Type: text/x-org, Size: 190 bytes --]
#+TITLE: Example Presentation
#+Options: ^:nil toc:nil
* Breeders Equation
\begin{equation*}
R = h^{2}S
\end{equation*}
- R :: response
- h^{2} :: heritability
- S :: selective distance
[-- Attachment #7: Type: text/plain, Size: 167 bytes --]
When exported to a beamer presentation, what should be h squared is
instead exported as h^{2}.
Thanks,
>
>
> Regards,
--
Eric Schulte
http://cs.unm.edu/~eschulte
next prev parent reply other threads:[~2013-04-14 17:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-13 23:12 having problems exporting to Beamer Eric Schulte
2013-04-14 7:51 ` Nicolas Goaziou
2013-04-14 17:08 ` Eric Schulte [this message]
2013-04-14 17:16 ` Nicolas Goaziou
2013-04-14 17:47 ` Eric Schulte
2013-04-14 19:15 ` Nicolas Goaziou
2013-04-15 0:27 ` Eric Schulte
2013-04-14 17:27 ` Nicolas Goaziou
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