Re: [Orgmode] Re: user-defined agenda sorting

[Carsten Dominik]

On Jun 16, 2009, at 11:13 AM, Samuel Wales wrote:

> If my skills at cargo-cult programming can summon the air force, then
> (get-text-property 1 'priority a/b] will work.  But I'm not sure if
> there are functions for parsing tags etc.  Testing seems difficult as
> cut and paste of headline strings seems to not include properties.
>
> Thanks.
>
> On Tue, Jun 16, 2009 at 01:57, Samuel Wales<address@hidden>  
> wrote:
> > I have a sort comparison function for the outline, which
> > returns a number.  This works well.
> >
> > The documentation for user-defined agenda sorting says "This
> > function must receive two arguments, agenda entry a and b."
> > I am not sure what a and b are, strings?
> >
> > My function gets priorities, tags, and todo kw assuming point is on a
> > headline.  It uses org functions to get those.  The org code for
> > agenda sorting uses text properties.
> >
> > How to adapt my function to get the following information: priorities
> > as [?A..?C], inherited and local tags as a list, and todo kw as a
> > string?
> >
> > Is there a place where how to parse a and b is documented?


Not really.  `a' and `b' are the strings that are inserted into the  
agenda,
each line in the agenda may be `a' or `b'.
The strings are loaded with text properties carrying all kinds of  
information.
You can look at these properties by pressing `C-u C-x =' on a line in  
the agenda.
If the information you want is not there, you can take the
org-morker and org-hd-marker properties to visit the original entries  
and
get the needed info from there.  And example for this is in `org-cmp- 
todo-state'
which returns to the original buffer in order to get the buffer-local
list of TODO states from there.

All the org-cmp-.... functions contain examples on how the text  
properties
are used from comparing entries.

The reason why these are in different text properties is historic,  
because I
added this stuff one by one, over time.  Looking back, a single  
property list
would have been better for tasks like the one you are working on.

HTH

- Carsten

> > Thanks.
> >
> > --
> > Myalgic encephalomyelitis denialism is causing death and severe  
> > suffering,
> > worse than MS.  Conflicts of interest are destroying research.  / 
> > You/ can
> > get the disease at any time permanently.  Do science and justice  
> > matter to
> > you?  http://www.meactionuk.org.uk/What_Is_ME_What_Is_CFS.htm
>
>
>
> --
> Myalgic encephalomyelitis denialism is causing death and severe  
> suffering,
> worse than MS.  Conflicts of interest are destroying research.  / 
> You/ can
> get the disease at any time permanently.  Do science and justice  
> matter to
> you?  http://www.meactionuk.org.uk/What_Is_ME_What_Is_CFS.htm
>
>
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