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Re: [O] Outline cycling does not preserve point's position

From: Carsten Dominik
Subject: Re: [O] Outline cycling does not preserve point's position
Date: Tue, 10 Sep 2013 10:16:06 +0200

On 10.9.2013, at 09:58, Carsten Dominik <address@hidden> wrote:

> On 10.9.2013, at 09:53, Suvayu Ali <address@hidden> wrote:
>> On Tue, Sep 10, 2013 at 09:32:57AM +0200, Suvayu Ali wrote:
>>> On Tue, Sep 10, 2013 at 08:03:32AM +0200, Carsten Dominik wrote:
>>>> One more thought:  What if the paragraph motion commands did use elements, 
>>>> but
>>>> ignored the hierarchy.  So they jump to the next headline, paragraph, 
>>>> table, src block, item?
>>>> I think this would feel similar to what paragraph motion does in text mode.
>>> This is a great suggestion!
>> Actually it is not trivial to do this I think.  It requires a lot of
>> special handling.  Effectively you have to "flatten" the element tree
>> (since there are greater elements, and more fundamental elements).  One
>> might then say: aha, just use the leaf nodes.  But again that does not
>> work.
>> A few examples: although a regular paragraph (whatever that might
>> be :-p) could be a leaf, what about a list?  Do we want traversing list
>> items or entire lists with this new implementation?
> Individual items
>> For a list with one
>> line entries, going over entire lists might be desired, on the other
>> hand a user might expect to traverse entries when going through a list
>> with multi-line or multi-paragraph entries.  Then there are tables, do
>> you traverse rows (which are elements AFAIU) or entire tables;
> entire tables.
>> and so
>> on.
> I do not think this is is difficult as you are saying.

Sorry for replying to myself.  I want to put a different light on this.

The question is:  What are people using C-arrow for?

I think the main application is reasonably fast motion
and selection in a *linear* way.  Is this correct, or do people
disagree here with me?

The amazing element motion commands Nicolas has implement
correspond to sexp motion, as he has said himself.
Maybe C-M-f and C-M-b are the better binding match for these?

- Carsten

> Cheers
> - Carsten
>> As you see this is a rather subjective issue.  I have a few thoughts
>> though.  We could discuss this on the list and give a default
>> implementation based on the consensus, but it would be nice to give an
>> easy way to _write_ a custom paragraph motion command using elements.  I
>> am not sure what that might be though :-p.  I will try to think about
>> this some more.
>> Cheers,
>> -- 
>> Suvayu
>> Open source is the future. It sets us free.

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