I don't think there is any "X11 default"; handling of selections/paste buffers has always been up to the individual applications.

Personally, I would consider 1. the most useful variant, followed by option 3.  OTOH, the 1. behaviour seems rather uncommon (I can't remember to have encountered it in any common application so far), so it's unlikely anyone would expect it...  (Another option I personally like is if the content of the paste buffer is inserted where the editor's text cursor currently is, independently of where exactly you middle-click within the application window, and independently of whether the cursor happens to be in a selection or not.)   In short, I'd say stick with 3. :)

In reply to Re: X11 pasting by almut
in thread X11 pasting by Sewi

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.