iOS Keyboard Scrolling Improvements and UITests

[tj-devel709]

Description of Change

MCT Popup

The iOS Keyboard Scrolling solution I posted a few months ago had an issue with the Maui Community Toolkit Popup. The main issue was that the popup has some external scrolling going on. The Maui code would grab the initial position of the cursor, the external scrolling would happen, and then our Maui code would scroll from the initial position making things messy and incorrect. The solution I came up with is refactoring the portion of the code that calculates where the cursor on the editor/entry is to later in the code and monitoring the ContainerView to see if there was a change in position and allotting time until this external scrolling is finished to start our scroll calculations. This should also help in future situations where we are not able to control an external scroll.

Before

PopupScroll-Before.mov

After

PopupScroll-After.mov

Next Return Key fix

When we have an entry with the ReturnType of 'Next' and we press that next button to go into an editor, the editor does not come up high enough. This was due to the additional AccessoryView that is added to the keyboard for editors in Maui. When we hit this scenario of switching between an editor and entry, we should recalculate to see if the keyboard changed sizes.

Scrolling animation glitch

There was a small glitch in the scrolling animation. While we are computing the animation speed the keyboard will use to come up, the screen would scroll a little after it making it a tad jumpy. Since we no longer need the automatic delay in the AdjustPositionDebounce method since the cursor location logic is moved to later in the process, I found that this delay was causing the small jump in the animation.

UITests

Testing the iOS Keyboard scenarios is difficult as there are many different scenarios. I created some UITests that can help keep track of the verification that scrolling is happening correctly.

It is important to note that each of the iOS Scrolling UI Tests are run with four different configurations:

• Using iOS Large Titles with a scrollable page
• Not using iOS Large Titles with a scrollable page
• Using iOS Large Titles with a non-scrollable page
• Not using iOS Large Titles with a non-scrollable page

Example of the Large Titles and Small Titles respectively:

Testing multiple editors in different locations

KeyboardScrollingEditorsDemo.mov

Testing multiple entries in different locations

KeyboardScrollingEntryDemo.mov

Entry Next Editor Test

KeyboardScrollingNextDemo.mov

Issues Fixed

Fixes PureWeen/ShanedlerSamples#13
Fixes #17588
#17559

[Eilon]

@tj-devel709 / @PureWeen - is there anything else required for this PR to be merged? I see there is a pending suggestion there, but I suggest that if we think this PR is a definite improvement, maybe it's worth merging as-is?

[tj-devel709]

We've had more discussions on this one and want to talk to the MauiCommunityToolkit about their process for this popup and go from there

[tj-devel709]

This delay is not really neccessary now. This was added in originally because clicking the entry triggers an event and the keyboard rising triggers an event. These events were sort of racing and we needed information about the cursor coming from the entry trigger. Now, the cursor logic is moved to later in the process and now we don't really need this delay. I would consider leaving this in just in case, but there is a small animation hiccup with this delay, and without it, the scrolling is MUCH more smooth!

[tj-devel709]

Trying this PR here instead to help an issue with UITests when creating PR from fork