Editor: Fixing iOS 14 Autoscroll Bug

[jleandroperez]

Fix

This PR fixes an iOS 14 scroll bug, that causes the TextView to jump over to the "previously selected" location instead.

@aerych I'm sorry to trouble you with this one sir!!

Please let me know about literally anything odd you might notice. Would be super if tested on iOS 12/13/14!!

Closes #888

Scenario 1:

1. Open a long document that requires vertical scrolling
2. Tap on top
3. Scroll all the way to the bottom

• Verify the cursor shows up at the spot where you've pressed
• Verify the vertical offset doesn't jump back to the former cursor's location
• Verify the inverse: while the caret is at the bottom, scroll to the top and tap anywhere please!

Scenario 2:

1. Open a long document that requires vertical scrolling, and has multiple checklists at the bottom
2. Tap on top
3. Scroll all the way to the bottom

• Verify that pressing over a Checklist at the bottom does not cause the editor to jump back to the top
• Verify that right after pressing over any Checklist Item the cursor appears at the end of the Item's Line
• Verify tapping over multiple Items in a row does not cause the contextual UIMenuController to show up

Scenario 3:

1. Scroll to the bottom
2. Long press over any checklist

• Verify nothing odd happens!

Scenario 4:

• Verify double tap over any word highlights it
• Verify long press over Links while in readonly mode works fine
• Verify dragging the cursor all over works as expected (and it's not impossible to control!)

Release

RELEASE-NOTES.txt was updated in 730f898 with:

Fixed a bug that affected scrolling in iOS 14 #916

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Sample Document!!

Welcome to Simplenote for iOS!

To add a note, tap the plus button.

Flick the list to browse your noes. Tap a title to view a note, then tap its contents to change it.

You can search all your notes by typing in the search field at the top of the note list.

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There are more note options if you need them. You can add others as collaborators to a note, or publish a note as a web page.

Use Simplenote on your Mac, Android device, or in your web browser at http://simplenote.com. Your notes will stay updated everywhere automatically.


To add a note, tap the plus button.

Flick the list to browse your notes. Tap a title to view a note, then tap its contents to change it.

You can search all your notes by typing in the search field at the top of the note list.

Tap the arrow button at the top left or swipe across your note list to view your tags. You can add tags to a note at the bottom of the note editor, and then use the sidebar to help you stay organized.

There are more note options if you need them. You can add others as collaborators to a note, or publish a note as a web page.

Use Simplenote on your Mac, Android device, or in your web browser at http://Simplenote.com. Your notes will stay updated everywhere automatically.

- [ ] Uno
- [ ] Dos
- [ ] Tres
- [ ] Cuatro
- [ ] Catorce!

everywhere automatically

[peril-automattic]

You can trigger an installable build for these changes by visiting CircleCI here.

[jleandroperez]

Moving to 4.26!

[aerych]

Hola @jleandroperez 👋
Test scenarios all pass and the code changes (apart from the commented stuff we were testing) looks sharp.
I spotted some oddities that we chatted about but those are existing/different things.
when ready sir!

[jleandroperez]

Thanks A LOT for killing this one @aerych!!!