TOPIC:

Hi Redaeepdf team,
I want to know how to get a sentence surrounding selected text.
Please let me know.
Thank you.

if u mean get textline, u can check '\r' or '\n' on previous and next.
if u mean sentence with words start and end, it shall check by yourself, like punctuation dot, and other analysis.

Is Radaee PDF software equipped with a function of extracting the related sentence when I click on the word?
(How to extract a selected word and sentence contained the word, when a word is selected.)

no sentence wrap coding.
but word wrap is equipped.
we check word like this:
if select char is not Latin char, return single char as word.
else :
seek prevous latin char loop to page start, blank or non-latin char.
seek next latin char loop to page end, blank or non-latin char.
return these 2 position, and set select range.

if Radaee PDF software is not equipped the function, can the function(extracting sentence contained selected word) can implement using Radaee PDF SDK(android and iOS)?
Thank you.

i think yes.
u may need using Page.ObjsGetString() to get all texts from page.
and Page.ObjsGetCharIndex() tells u char index clicked.
then analysis sentence by yourself.