In the original post about a cheap way to set the line height in a text view to, say, 150%, the result kind of worked but didn’t look that cool. One issue is that the extra line spacing was exclusively added at the bottom. With the following solution, you’ll get a proper line height with tastefully aligned insertion point and baseline and all.
Typewriter modes depend on the feature that you can scroll farther up and down than usual. You need extra whitespace, most of the time in both directions. Let’s start with “overscrolling” to understand what we need. Regular text views show additional bottom whitespace only until you fill it with text. Take TextEdit, for example. You can start to type at the topmost edge of the text view and the rest of the window is blank.
I am currently working on a typewriter mode text view. Even though this is a very popular trend for a couple of years, I couldn’t find any open source component for this feature. I assume those who figure this out keep it a secret. If that is the case, it doesn’t make that much sense nowadays anymore since every 3rd note taking app or so has such a feature already.