Remove insets from scroll view

[xyzqm]

Description

Before: see https://github.com/CodeEditApp/CodeEdit/issues/1700 After:

https://github.com/CodeEditApp/CodeEditTextView/assets/65467530/a6ce46fa-6576-4c23-8e72-0af64861d168

Related Issues

• Closes https://github.com/CodeEditApp/CodeEdit/issues/1700
• Closes #7

Checklist

• [x] I read and understood the contributing guide as well as the code of conduct
• [x] The issues this PR addresses are related to each other
• [x] My changes generate no new warnings
• [x] My code builds and runs on my machine
• [x] My changes are all related to the related issue above
• [x] I documented my code

Screenshots

[xyzqm]

Oh shoot, just realized the line numbers are now bleeding over the edge...will see what I can about that 😓

[xyzqm]

@austincondiff sorry I'm really new to Swift and am probably missing a really easy way to fix this issue; any pointers? I think the issue stems from the fact that gutterView is added via addFloatingSubview, which causes it to display over the horizontal scrollbar, but I can't figure out how to get it to display under.

[austincondiff]

It looks like the line numbers are fine. The text and selection don't come down far enough though.

@thecoolwinter any thoughts on this?

[xyzqm]

By the way, should we potentially hide the horizontal scrollbar if there's nothing to scroll horizontally/if word wrapping is turned on?

[austincondiff]

Oh, I see. The line numbers are overlapping the horizontal scrollbar. Two things need to happen here:

1. Line numbers / gutter should stop at the horizontal scrollbar if it is displayed.
2. If there is not horizontal overflow, horizontal scrollbar should be hidden.