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* Bug: Broken fontification of code blocks [7.5 (release_7.5.525.gd6fb5)]
@ 2011-07-01  0:22 Oleksandr Manzyuk
  2011-07-01 18:33 ` Eric Schulte
  0 siblings, 1 reply; 2+ messages in thread
From: Oleksandr Manzyuk @ 2011-07-01  0:22 UTC (permalink / raw)
  To: emacs-orgmode

Remember to cover the basics, that is, what you expected to happen and
what in fact did happen.  You don't know how to make a good report?  See


Your bug report will be posted to the Org-mode mailing list.

How to reproduce:

1.  Launch Emacs with the following minimal =.emacs= (adjust the path
to `org-mode' if necessary):

(add-to-list 'load-path "~/.emacs.d/site-lisp/org-mode/lisp")
(add-to-list 'load-path "~/.emacs.d/site-lisp/org-mode/contrib/lisp")

(require 'org-install)

(add-to-list 'auto-mode-alist '("\\.org$" . org-mode))

(setq org-src-fontify-natively t)

2.  Edit the following minimal example:

(defun id (x) x)

It is expected that the text between #+begin_src and #+end_src be
fontified (in my case, using the reverse video mode of Emacs with the
default color theme, it should be grey70).  This doesn't happen, the
text is white.  If I change the first line to

#+begin_src emacs-lisp

the interior of the code block is properly fontified according to the
mode.  If I remove `emacs-lisp', the text becomes white again.

I think I've nailed down the problem.  The following patch works for
me (although I didn't test it thoroughly):

diff --git a/lisp/org.el b/lisp/org.el
index 3162cc3..2f79298 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -5166,7 +5166,7 @@ will be prompted for."
   "Fontify #+ lines and blocks, in the correct ways."
   (let ((case-fold-search t))
     (if (re-search-forward
-	 "^\\([ \t]*#\\+\\(\\([a-zA-Z]+:?\\|
\\|$\\)\\(_\\([a-zA-Z]+\\)\\)?\\)[ \t]*\\(\\([^ \t\n]*\\)[
+	 "^\\([ \t]*#\\+\\(\\([a-zA-Z]+:?\\|
\\|$\\)\\(_\\([a-zA-Z]+\\)\\)?\\)[ \t]*\\(\\([^ \t\n]+\\)?[
 	 limit t)
 	(let ((beg (match-beginning 0))
 	      (block-start (match-end 0))

The problem is that with the old regexp, if no language is specified,
the 7th group still matches and becomes "", the empty string, not nil,
and therefore the condition (and lang org-src-fontify-natively) always
succeeds provided that `org-src-fontify-natively' is set to t.

Emacs  : GNU Emacs 23.2.1 (x86_64-pc-linux-gnu, GTK+ Version 2.20.1)
 of 2010-09-02 on pluot, modified by Debian
Package: Org-mode version 7.5 (release_7.5.525.gd6fb5)

current state:
 org-export-latex-after-initial-vars-hook '(org-beamer-after-initial-vars)
 org-speed-command-hook '(org-speed-command-default-hook
 org-src-fontify-natively t
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-export-blocks-postblock-hook '(org-exp-res/src-name-cleanup)
 org-export-latex-format-toc-function 'org-export-latex-format-toc-default
 org-tab-first-hook '(org-hide-block-toggle-maybe
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
 org-confirm-shell-link-function 'yes-or-no-p
 org-export-first-hook '(org-beamer-initialize-open-trackers)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
 org-mode-hook '((lambda nil
		  (org-add-hook (quote change-major-mode-hook)
		   (quote org-show-block-all) (quote append) (quote local))
		 (lambda nil
		  (org-add-hook (quote change-major-mode-hook)
		   (quote org-babel-show-result-all) (quote append) (quote local))
		 org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point
 org-confirm-elisp-link-function 'yes-or-no-p
 org-export-interblocks '((lob org-babel-exp-lob-one-liners)
			  (src org-babel-exp-inline-src-blocks))
 org-occur-hook '(org-first-headline-recenter)
 org-export-latex-final-hook '(org-beamer-amend-header org-beamer-fix-toc
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-export-blocks '((src org-babel-exp-src-block nil)
		     (comment org-export-blocks-format-comment t)
		     (ditaa org-export-blocks-format-ditaa nil)
		     (dot org-export-blocks-format-dot nil))

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2011-07-01  0:22 Bug: Broken fontification of code blocks [7.5 (release_7.5.525.gd6fb5)] Oleksandr Manzyuk
2011-07-01 18:33 ` Eric Schulte

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