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Re: Whatever happened to the Secondary Selection?




On Sun, 21 Aug 2016 12:28:18 +0100, Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx> wrote:

I think you should forget about the X Window definition of
PRIMARY/SECONDARY, since this isn't really about that.

It is about issues with the normal selection model, that just *happen* to
be addressed by some of the concepts in X's idea of SECONDARY selection,
specifically what happens to the insertion point/cursor when making
conventional selections. The suggestions really have nothing to do with the specifics of X's definition, but really distill down to two key differences
with this "new" selection process:

    1) selection itself does not move the insertion point/cursor
    2) paste occurs immediately at the end of an uncancelled selection
process

Yes, that is it. Looking at https://specifications.freedesktop.org/clipboards-spec/clipboards-latest.txt, which someone pointed us to, it says;

The ICCCM defines these as follows:
  "The selection named by the atom PRIMARY is used for all com-
  mands  that take only a single argument ....

  The selection named by the atom SECONDARY is used:
  o   As  the second argument to commands taking two arguments
      (for example, "exchange  primary  and  secondary  selec-
      tions")

Well I have never encountered such a use ...

  o   As  a  means  of  obtaining data when there is a primary
      selection and the user does not want to disturb it

But that is exactly the point, except that when there is No primary selection, there is still an Insertion Point, which is equivalent to a primary selection of zero length, and the Insertion Point is what I do not want to disturb.

Essentially, the present protocols (whether using the Clipboard, or the ugly Primary followed by Middle button) are "PUSH". You go and select some text somewhere, and then decide where you want to Paste it.

The protocol I am advocating is "PULL". You are sat at some Insertion Point, and then go on a fishing expedition to find some useful text, and have it pasted where you are sat.

Anyway, I see that my code has been downloaded 7 times, do we need to hear from people who have actually tried it.

I agree with you that portability issues make it hard to consider adopting
this sort of model.

This is a "Look and Feel" thing. If it doesn't work on Win 32 (and it probably won't), then Microsoft addicts will not be able to use it, which is their misfortune. But they won't actually have lost anything that currently works for them. Hopefully Wayland can be fixed (but how soon is that going to become the default on any major Linux Vendor's system?)

I didn't find the video terribly compelling -

Yes, I accept that video was a bit turgid (I learnt a lot about making videos in the process, but have still much to learn - sorry that you people got stuck in my learning process :-) ).

--
Charles H. Lindsey ---------At Home, doing my own thing------------------------ Tel: +44 161 436 6131 Web: http://www.cs.man.ac.uk/~chl
Email: chl@xxxxxxxxxxxxxxxx      Snail: 5  SK8 3JU, U.K.
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