getLongestLine() on SkParagraph

[Данил Буланов]

Hello, I have noticed weird behaviour of skParagraph::getLongestLine(), it returns something line -inf for empty text, which I suupose happens because of this line
https://skia.googlesource.com/skia/+/refs/heads/main/modules/skparagraph/src/ParagraphImpl.cpp#188

Can someone clarify the reason of that code existence?

[jlav...@google.com]

You are right, it's weird but SkParagraph was designed to replace another text renderer and it had to mimic the existing behavior.

Whenever you see the comment "// That is what flutter has" it's what we had to do.

Notice, that this code serves the case when the text cannot be shaped properly at all (not a single codepoint can be shown with any given font).

I assume that Flutter wants to detect this case and treat it differently from the normal empty text.