* Org-element once again
@ 2014-10-07 23:10 Marcin Borkowski
2014-10-08 2:44 ` Eric Abrahamsen
0 siblings, 1 reply; 4+ messages in thread
From: Marcin Borkowski @ 2014-10-07 23:10 UTC (permalink / raw)
To: emacs-orgmode@gnu.org
Hi list,
does there exist any place I could find the specs of the org-element
data structure? From what I can see, it is a list whose car is the type
of the element, then a (somewhat mysterious or me) plist follows, and
then the children. Where could I find more info? If the answer is
"read the source, Luke" ;-) , which functions should I start with?
Best,
--
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Adam Mickiewicz University
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Org-element once again
2014-10-07 23:10 Org-element once again Marcin Borkowski
@ 2014-10-08 2:44 ` Eric Abrahamsen
2014-10-08 7:20 ` Thorsten Jolitz
0 siblings, 1 reply; 4+ messages in thread
From: Eric Abrahamsen @ 2014-10-08 2:44 UTC (permalink / raw)
To: emacs-orgmode
Marcin Borkowski <mbork@wmi.amu.edu.pl> writes:
> Hi list,
>
> does there exist any place I could find the specs of the org-element
> data structure? From what I can see, it is a list whose car is the type
> of the element, then a (somewhat mysterious or me) plist follows, and
> then the children. Where could I find more info? If the answer is
> "read the source, Luke" ;-) , which functions should I start with?
>
> Best,
Have you looked at this page?
http://orgmode.org/worg/dev/org-element-api.html
That and the pages linked from it seem to cover most of what's going on.
The mysterious plist holds all the properties for a given element. Most
are generated by the parsing process (eg :contents-begin and
:contents-end, see the link above for all the different properties the
various elements/objects might get), while headlines will also have
their actual property-drawer properties put into the list.
The only thing that remains a little opaque to me is the "section"
element, which apparently gets wrapped around a heading's subtree. I
don't know what it does, but it's never gotten in my way so I haven't
worried about it.
Hope that helps,
Eric
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Org-element once again
2014-10-08 2:44 ` Eric Abrahamsen
@ 2014-10-08 7:20 ` Thorsten Jolitz
2014-10-08 7:31 ` Eric Abrahamsen
0 siblings, 1 reply; 4+ messages in thread
From: Thorsten Jolitz @ 2014-10-08 7:20 UTC (permalink / raw)
To: emacs-orgmode
Eric Abrahamsen <eric@ericabrahamsen.net> writes:
> Marcin Borkowski <mbork@wmi.amu.edu.pl> writes:
>
>> Hi list,
>>
>> does there exist any place I could find the specs of the org-element
>> data structure? From what I can see, it is a list whose car is the type
>> of the element, then a (somewhat mysterious or me) plist follows, and
>> then the children. Where could I find more info? If the answer is
>> "read the source, Luke" ;-) , which functions should I start with?
>>
>> Best,
>
> Have you looked at this page?
>
> http://orgmode.org/worg/dev/org-element-api.html
>
> That and the pages linked from it seem to cover most of what's going on.
>
> The mysterious plist holds all the properties for a given element. Most
> are generated by the parsing process (eg :contents-begin and
> :contents-end, see the link above for all the different properties the
> various elements/objects might get), while headlines will also have
> their actual property-drawer properties put into the list.
>
> The only thing that remains a little opaque to me is the "section"
> element, which apparently gets wrapped around a heading's subtree. I
> don't know what it does, but it's never gotten in my way so I haven't
> worried about it.
in simple terms, the data structure is just:
,----
| (element-typ (plist) (section))
`----
i.e. the plist describes the element itself, the section is its
content.
* TODO Test :@home:
DEADLINE: <2014-10-09 Do>
:PROPERTIES:
:ARCHIVE: foo
:END:
org-element-at-point does not parse the contents of an element, it
thus simply returns
,----
| (element-typ (plist))
`----
#+NAME: foo
#+BEGIN_SRC emacs-lisp
(save-excursion
(outline-previous-heading)
(org-element-at-point))
#+END_SRC
# [:results pp]
#+results:
: (headline
: (:raw-value "Test" :begin 1432 :end 2214 :pre-blank 0 :contents-begin 1452 :contents-end 2214 :level 1 :priority nil :tags
: ("@home")
: :todo-keyword "TODO" :todo-type todo :post-blank 0 :footnote-section-p nil :archivedp nil :commentedp nil :post-affiliated 1432 :deadline
: (timestamp
: (:type active :raw-value "<2014-10-09 Do>" :year-start 2014 :month-start 10 :day-start 9 :hour-start nil :minute-start nil :year-end 2014 :month-end 10 :day-end 9 :hour-end nil :minute-end nil :begin 1464 :end 1479 :post-blank 0))
: :ARCHIVE "foo" :title "Test"))
#+NAME: bar
#+BEGIN_SRC emacs-lisp :var x=foo
(org-element-interpret-data x)
#+END_SRC
#+results: bar
: * TODO Test :@home:
so this is (just) the element (headline) as specified by its plist.
You can get the contents e.g. with
#+BEGIN_SRC emacs-lisp :results wrap
(require 'org-dp-lib)
(save-excursion
(outline-previous-heading)
(org-dp-contents nil t)))
#+END_SRC
#+results:
:RESULTS:
DEADLINE: <2014-10-09 Do>
:PROPERTIES:
:ARCHIVE: foo
:END:
[...]
:END:
but the default org-element-parse-buffer parses everything (when specified), the
contents too, so it would give you
,----
| (element-typ (plist) (section))
`----
with section recursively containing other elements with the same
structure -> a nested list.
--
cheers,
Thorsten
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Org-element once again
2014-10-08 7:20 ` Thorsten Jolitz
@ 2014-10-08 7:31 ` Eric Abrahamsen
0 siblings, 0 replies; 4+ messages in thread
From: Eric Abrahamsen @ 2014-10-08 7:31 UTC (permalink / raw)
To: emacs-orgmode
Thorsten Jolitz <tjolitz@gmail.com> writes:
> Eric Abrahamsen <eric@ericabrahamsen.net> writes:
>
>> Marcin Borkowski <mbork@wmi.amu.edu.pl> writes:
>>
>>> Hi list,
>>>
>>> does there exist any place I could find the specs of the org-element
>>> data structure? From what I can see, it is a list whose car is the type
>>> of the element, then a (somewhat mysterious or me) plist follows, and
>>> then the children. Where could I find more info? If the answer is
>>> "read the source, Luke" ;-) , which functions should I start with?
>>>
>>> Best,
>>
>> Have you looked at this page?
>>
>> http://orgmode.org/worg/dev/org-element-api.html
>>
>> That and the pages linked from it seem to cover most of what's going on.
>>
>> The mysterious plist holds all the properties for a given element. Most
>> are generated by the parsing process (eg :contents-begin and
>> :contents-end, see the link above for all the different properties the
>> various elements/objects might get), while headlines will also have
>> their actual property-drawer properties put into the list.
>>
>> The only thing that remains a little opaque to me is the "section"
>> element, which apparently gets wrapped around a heading's subtree. I
>> don't know what it does, but it's never gotten in my way so I haven't
>> worried about it.
>
> in simple terms, the data structure is just:
>
> ,----
> | (element-typ (plist) (section))
> `----
>
> i.e. the plist describes the element itself, the section is its
> content.
>
>
> * TODO Test :@home:
> DEADLINE: <2014-10-09 Do>
> :PROPERTIES:
> :ARCHIVE: foo
> :END:
>
>
> org-element-at-point does not parse the contents of an element, it
> thus simply returns
>
> ,----
> | (element-typ (plist))
> `----
>
> #+NAME: foo
> #+BEGIN_SRC emacs-lisp
>
> (save-excursion
> (outline-previous-heading)
> (org-element-at-point))
> #+END_SRC
>
> # [:results pp]
> #+results:
> : (headline
> : (:raw-value "Test" :begin 1432 :end 2214 :pre-blank 0 :contents-begin 1452 :contents-end 2214 :level 1 :priority nil :tags
> : ("@home")
> : :todo-keyword "TODO" :todo-type todo :post-blank 0 :footnote-section-p nil :archivedp nil :commentedp nil :post-affiliated 1432 :deadline
> : (timestamp
> : (:type active :raw-value "<2014-10-09 Do>" :year-start 2014
> :month-start 10 :day-start 9 :hour-start nil :minute-start nil
> :year-end 2014 :month-end 10 :day-end 9 :hour-end nil :minute-end nil
> :begin 1464 :end 1479 :post-blank 0))
> : :ARCHIVE "foo" :title "Test"))
>
> #+NAME: bar
> #+BEGIN_SRC emacs-lisp :var x=foo
>
> (org-element-interpret-data x)
> #+END_SRC
>
> #+results: bar
> : * TODO Test :@home:
>
>
> so this is (just) the element (headline) as specified by its plist.
>
> You can get the contents e.g. with
>
> #+BEGIN_SRC emacs-lisp :results wrap
> (require 'org-dp-lib)
> (save-excursion
> (outline-previous-heading)
> (org-dp-contents nil t)))
> #+END_SRC
>
> #+results:
> :RESULTS:
> DEADLINE: <2014-10-09 Do>
> :PROPERTIES:
> :ARCHIVE: foo
> :END:
>
> [...]
> :END:
>
> but the default org-element-parse-buffer parses everything (when specified), the
> contents too, so it would give you
>
> ,----
> | (element-typ (plist) (section))
> `----
>
> with section recursively containing other elements with the same
> structure -> a nested list.
Interesting! I didn't realize that all elements came with a section when
you parsed the buffer, thanks for pointing that out.
E
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-10-08 7:32 UTC | newest]
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2014-10-07 23:10 Org-element once again Marcin Borkowski
2014-10-08 2:44 ` Eric Abrahamsen
2014-10-08 7:20 ` Thorsten Jolitz
2014-10-08 7:31 ` Eric Abrahamsen
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