How is the Card rectangle found? Can partial off screen rectangles be located?

[rsaunders100]

Hi, I want to have a go at implementing accessibility for the blind. I want to give voice instructions as per my issue suggestion.
card-io/card.io-iOS-SDK#202 (comment)

I am just starting out so maybe this is not possible, but the plan is to:

1. Find where in the code the rectangles are detected.
2. Expose the relative positioning of the largest rectangle relative to the screen to the iOS / Android specific clients.
3. In the iOS client translate the relative instructions into localised voice commands.
4. Read out the commands using an accessibility announcement.

My questions are:

1. Is there anything that will make this super hard?
2. Is the card rectangle detected if its slightly offscreen?
3. Where in the code should I start out?

[dgoldman-pdx]

@rsaunders100 I'm no longer close enough to the code to directly answer your questions. But we've added a Documentation section to our README file, which includes a link to a video you should find helpful.