fix #2015

[frankyifei]

add margins in elementFromPoint() and some changes about page-break-after

[houqp]

Thanks for fix :) Just curious, will this fix koreader/koreader#2021 too?

[frankyifei]

no. I'm working on #2021 but still not very clear. I found that the position of the highlighted area need to consider left and top paddings(and borders). But I still dont know why it will appear on other pages.
I am reading the code in cre.cpp, getWordBoxesFromPositions() called ldomXRange.getRect(). maybe i can change this function?
Another finding: only the highlight on first page will be shown on the following pages. but maybe this depends on the ebook

[houqp]

I am not very sure why this is happening either. I was looking at this, but then got distracted by segfaults in kobo screenshot and suspension. @Hzj-jie put out a minimal reproducible same txt file in koreader/koreader#1944 (see the screenshot). Using this test sample should help us find the bug easier than debugging on a real epub. I will also help take a look at this after I figure out what's causing the segfaults in kobo.

[frankyifei]

I think these code are not so mature as the coolreader itself does not use them. its own bookmark is implemented in another way.

[houqp]

You mean the hightlight code path?

[frankyifei]

I searched the whole project for ldomXRange.getRect and it was not called once. Maybe I searched wrong name?