Stefan Monnier <monnier@iro.umontreal.ca> writes:

Hi Stefan,

>> I don't see any reason why some isearch-like behavior wouldn't be
>> possible.  Of course, we cannot highlight of the matches, so another
>> C-s should jump to the next page with a match instead of the next
>> match which could be on the same page.
>
> We may even be able to reuse the isearch machinery and just set
> isearch-search-fun-function.

I'm trying to implement that now, but I have some problems with it.  I
set isearch-search-fun-function buffer-locally to
doc-view-isearch-function in doc-view-mode.  If I describe this variable
in a doc-view buffer, it says it hat the desired value.  But when I hit
C-s to start isearch and edebug isearch-search-fun it shows up that
isearch-search-fun-function is nil then.  But why is that?

This variable is neither set to nil in isearch.el nor doc-view.el.

After I leave isearch with C-g the variable's buffer-local value has
disappeared.

Here's my patch.  It's just a simple start, but doc-view-search-forward
seems to work correctly.