Re: Pretty org-entities in org-mode buffers

["Eric Schulte" <schulte.eric@gmail.com>]

Hi Carsten,

Carsten Dominik <carsten.dominik@gmail.com> writes:

> On Jun 3, 2010, at 7:51 PM, Eric Schulte wrote:
>
>> Hi Carsten,
>>
>> This appears to be an issue in the HEAD (as of two weeks ago) of the
>> Emacs git repository.  I was able to get around this issue (and a
>> couple of other font-lock related issues) by stepping back to an
>> older version of Emacs (tag EMACS_23_2 in the git repository).
>>
>> I haven't tried to go back to the Emacs development HEAD, but I
>> assume that they'll take care of this issue sooner or later, either
>> way it's not a problem with any of the code in Org-mode.
>
> You may or may not have noticed that there is now also support for
> subscripts and superscripts being displayed pretty.  This is now realy
> how I wanted scientific note taking to work.

Oh, that is *very* nice, I hadn't noticed the sub/super scripts before,
It's great that even the _{} bracketed notation works.

> Need to make a screencast to show how awesomely this does work.
>

Yes, a screencast has been on the Babel TODO list for some time now as
well.

>
> The only thing missing is a little sketch tool in Emacs, fast enough
> to be used while taking notes... :-)
>

I often use ditaa or example blocks with artist mode when I'm taking
notes, but the use of artist mode isn't quite "natural" -- although I
doubt you could do any better encoding sketches in plain text.

>
> Thanks a lot for you initial implementation of pretty entities - this
> has been a breakthrough here.
>

my pleasure, the real work was done before my implementation in the
collection of the org-entities.

>
> Where do we stand with integrating org-babel?  If you ask me, it is
> time to do that.
>

I know Dan and Tom have made a start on the documentation, to date I
haven't really done any work on the org-babel integration, but that
should change starting next week.  Expect to hear about progress on the
org-babel integration in the next week or two.

Thanks -- Eric

>
> - Carsten
>
>>
>> Best -- Eric
>>
>> Carsten Dominik <carsten.dominik@gmail.com> writes:
>>
>>> Hi Eric,
>>>
>>> have you been able to get past this issue?
>>>
>>> - Carsten
>>>
>>> On May 17, 2010, at 5:01 PM, Eric Schulte wrote:
>>>
>>>> So looking into this slightly deeper,
>>>>
>>>> I do have org-pretty-entities set to t in my config.
>>>>
>>>> Toggling entities display with C-c C-x \ has no effect.
>>>>
>>>> The value of org-highlight-latex-fragments-and-specials is nil.
>>>>
>>>> Entities are only displayed when I search for the "\\" character, no
>>>> other searches result in displayed entities.
>>>>
>>>> Interestingly, when starting with a fresh "emacs -Q" and only
>>>> loading
>>>>
>>>> --8<---------------cut here---------------start------------->8---
>>>> (load-file "~/src/org/lisp/org-install.el")
>>>> (setq org-pretty-entities t)
>>>> --8<---------------cut here---------------end--------------->8---
>>>>
>>>> I have the same problem, so maybe my version of Emacs is to blame,
>>>> I'm
>>>> using the latest from the emacs git/bzr repo
>>>>
>>>> --8<---------------cut here---------------start------------->8---
>>>> ~/src/emacs/src/emacs --version
>>>> GNU Emacs 24.0.50.1
>>>> Copyright (C) 2010 Free Software Foundation, Inc.
>>>> GNU Emacs comes with ABSOLUTELY NO WARRANTY.
>>>> You may redistribute copies of Emacs
>>>> under the terms of the GNU General Public License.
>>>> For more information about these matters, see the file named
>>>> COPYING.
>>>> --8<---------------cut here---------------end--------------->8---
>>>>
>>>> When I get some more time, I'll look into this further.
>>>>
>>>> Thanks -- Eric
>>>>
>>>> Carsten Dominik <carsten.dominik@gmail.com> writes:
>>>>
>>>>> On May 16, 2010, at 11:09 PM, Eric Schulte wrote:
>>>>>
>>>>>> Hi Carsten,
>>>>>>
>>>>>> Thanks for folding in this feature.
>>>>>>
>>>>>> I'm having some weird issues using the new entities display.  The
>>>>>> entities are not fontified in my org-mode buffers despite having
>>>>>> set
>>>>>> the
>>>>>> org-pretty-entities variable to t.  However if I search
>>>>>> `isearch-forward-regexp' for the "\\" character in the buffer then
>>>>>> all
>>>>>> of the entities are displayed (e.g. \sum is replaced with ∑).
>>>>>>
>>>>>> Any idea why the entity display is only working during a search?
>>>>>
>>>>> One idea:  Do you have turned on org-highlight-latex-fragments-and-
>>>>> specials?
>>>>>
>>>>> - Carsten
>>>>>
>>>>>
>>>>>>
>>>>>> Thanks -- Eric
>>>>>>
>>>>>> Carsten Dominik <carsten.dominik@gmail.com> writes:
>>>>>>
>>>>>>> Hi everyone,
>>>>>>>
>>>>>>> a modified version of Eric's code is now included into Org, I
>>>>>>> just
>>>>>>> pushed it
>>>>>>> to the git repo.
>>>>>>>
>>>>>>> You can use the command `C-c C-x \' to toggle this feature.
>>>>>>>
>>>>>>> The variable `org-pretty-entities' determines if this mode is
>>>>>>> on by
>>>>>>> default.
>>>>>>>
>>>>>>> Finally, you can use
>>>>>>>
>>>>>>> #+STARTUP: entitiespretty
>>>>>>> #+STARTUP: entitiesplain
>>>>>>>
>>>>>>> to change things on a per-file base.
>>>>>>>
>>>>>>> Thanks to Eric for this great idea.
>>>>>>>
>>>>>>> - Carsten
>>>>>>>
>>>>>>> On May 5, 2010, at 6:19 PM, Eric Schulte wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> Recently I've been making use of org-entites for exporting my
>>>>>>>> greek/
>>>>>>>> math
>>>>>>>> heavy class notes to HTML.  I'm really loving the results.
>>>>>>>>
>>>>>>>> This morning I've started playing around with the below function
>>>>>>>> `org-pretty-entities', which is adapted from Phil Hagelberg's
>>>>>>>> `pretty-lambdas'[1].  Calling this function in an org-mode
>>>>>>>> buffer
>>>>>>>> will
>>>>>>>> have the effect of fontifying all org-entities text strings as
>>>>>>>> the
>>>>>>>> character which they represent, so \Delta is replaced with Δ,
>>>>>>>> \lambda
>>>>>>>> with λ, \in with ∈, and so forth.
>>>>>>>>
>>>>>>>> I've just started playing with this, and I make no guarantees as
>>>>>>>> to
>>>>>>>> it's
>>>>>>>> safety or utility, but I was very pleasantly surprised by the
>>>>>>>> simplicity
>>>>>>>> of the function, and how nice it's been to see my special
>>>>>>>> characters
>>>>>>>> appear in org-mode buffers as I type.
>>>>>>>>
>>>>>>>> #+begin_src emacs-lisp :results silent
>>>>>>>> (defun org-pretty-entities ()
>>>>>>>> (interactive)
>>>>>>>> (font-lock-add-keywords
>>>>>>>>  nil (mapcar
>>>>>>>>       (lambda (el)
>>>>>>>>         (list
>>>>>>>>          (concat "(?\\(" (regexp-quote "\\") (nth 0 el) "[\s]"
>>>>>>>> "\
>>>>>>>> \)")
>>>>>>>>          `(0 (progn (compose-region (match-beginning 1) (-
>>>>>>>> (match-
>>>>>>>> end 1) 1)
>>>>>>>>                                     ,(nth 6 el)) nil))))
>>>>>>>>       org-entities)))
>>>>>>>>
>>>>>>>> (org-pretty-entities)
>>>>>>>> #+end_src
>>>>>>>>
>>>>>>>> To try this out, just evaluate the above code block inside of an
>>>>>>>> org-mode buffer, then starting typing out org-entities.
>>>>>>>>
>>>>>>>> Hope others find this useful.
>>>>>>>>
>>>>>>>> Best -- Eric
>>>>>>>>
>>>>>>>> Footnotes:
>>>>>>>> [1]  http://github.com/technomancy/emacs-starter-kit/blob/master/starter-kit-defuns.el#L135
>>>>>>>>
>>>>>>>>
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>>>>>>>
>>>>>>> - Carsten
>>>>>
>>>>> - Carsten
>>>
>>> - Carsten
>
> - Carsten