isearch region or thing at point.

[Ergus]

Hi:

I am looking in the manual for two isearch functionalities that maybe
are already implemented, but I don't find them. Else maybe it is not
so complex to do in elisp (at least for my config) And you could suggest
a right way to implement it.

1) isearch-yank-thing-at-point, this should be similar to
isearch-yank-word, but if the cursor is in the middle of a word
it may insert the whole word not just the rest of the current word.

(swiper provides this with M-n)

2) In "transient-mark-mode" if the region is active before C-s, the
initial input could be the text in the region. Is it there a way to
enable that behavior?

An alternative for this is a command that yanks the region's text in the
minibuffer when isearch is active so we could bind it in the isearch-map
(for example to M-f).

Are some of these already implemented?

Very thanks in advance,
Ergus.