Searching large pdf files reports only matched or not, not matched texts.

[TooChaos]

Hi Chen Bin,

It looks like the default incremental search behaviour is, for large file, using 'grep' instead of emacs' native search function. However, 'grep' treats the pdf file as a binary file by default, hence reports only matched or not.
Can we, e.g., pass "--text" flag to "grep" when the file is pdf. Or simply fall back to emacs' native search function?
Thanks!

[redguardtoo]

which command you use in Emacs?

[TooChaos]

C-s runs the command counsel-grep-or-swiper (found in global-map),
which is an autoloaded interactive compiled Lisp function in
‘counsel.el’.
It is bound to C-s.
(counsel-grep-or-swiper &optional INITIAL-INPUT)

By the way I am using pdftools mode.
Thanks!