On Sun, Aug 10, 2014 at 7:59 AM, Tom <adatgyujto@gmail.com> wrote:

>
>
> Yes, that would be the full realization of the idea.
> Being able to select from FROM -> TO history pairs and quickly edit
> them in-place if  needed.
>
> So the current FROM input field should provide access to  previous
> FROM -> TO pairs and handle the case when such a pair is
> inputted instead of a simple FROM string.
>
>
I created a quick proof of concept implementation. It changes the behavior
of the arrow keys for the query-replace(-regexp) FROM prompt. You can stll
access the original behavior with M-p/n.

So when you start a query-replace and press the up arrow then
search/replace history is rendered as FROM -> TO pairs.  The -> marker is
highlighted and intangible, the cursor jumps over it and you are free to
edit the search/replace string. If you submit a FROM->TO pair from the FROM
input field with RET then the replacement is started immediately. If you
submit a simple string (without the marker) then it behaves as usual and
asks for a TO string.

See the attached file.