feat(components): Extend viewport awareness for horizontally scrollable views

[n-sviridenko]

Solves #114

[coveralls]

Pull Request Test Coverage Report for Build 438

• 6 of 12 (50.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.3%) to 81.337%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/components/src/viewport/aware/index.js	0	6	0.0%

Totals
Change from base Build 424:	-0.3%
Covered Lines:	1207
Relevant Lines:	1420

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💛 - Coveralls

[n-sviridenko]

Are there any updates on it? @ognen @andon @bevkoski

[andon]

Hi @n-sviridenko,

Thanks a lot for the efforts to implement this. To me it looks fine, but @bevkoski is the expert for this and he's been enjoying a vacation these days. He knows the nitty-gritty details of it, and I would like him to test it in our main app before it's being merged.

If you are extremely dependent on it (i.e. for some reason can't depend on your branch), I can merge it and cut a release.

[bevkoski]

Great job @n-sviridenko! 👏
I could quickly confirm that your code works using the following Snack: https://snack.expo.io/Bkl6Y75xB
Let's do several very small improvements and release this.

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It makes sense to rename the following parameter to viewportSize:

skele/packages/components/src/viewport/utils.js

Line 5 in b7758ef

viewportHeight,

The following to elementSize:

skele/packages/components/src/viewport/utils.js

Line 7 in b7758ef

elementHeight,

And the following to isViewportOffsetBeforeElement:

skele/packages/components/src/viewport/utils.js

Line 17 in b7758ef

if (isViewportOffsetAboveElement) {

Since we are using the same function for calculating both inVerticalViewport and inHorizontalViewport.

[bevkoski]

The suggested refactoring was done in a separate PR: #139. This one is ready for merging.