GitLab

In PDFiumEngine, currently the size of the shadows surrounding a
page is constant because there is only a single page view. With
the addition of two-up view, the sizes of the shadows will depend
on the position of the page within its document.

draw_utils::GetPageInsetsForTwoUpView() is a function that takes
the position of the page within the document and shadow sizes,
and returns the proper configuration of inset sizes for two-up
view. Having this as a separate function makes this logic testable
and reduces the future complexity of PDFiumEngine.

Bug: 51472
Change-Id: Icecbb05f672b10ca682ae383308abb96075b64ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1707951
Commit-Queue: Jeremy Chinsen <chinsenj@google.com>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#679590}