Emacs Folding

Emacs sees source code (outside of elisp) as plain text, which means that, unlike language-specific IDEs, it tends not to have great semantic knowledge of what it’s looking at. This isn’t necessarily a bad thing, but it makes some things - like source code folding - a hassle.

I am specifically looking for an elisp function that is similar to jao-toggle-selective-display, except that it will show the first line of a multi-line block of text. This means you won’t be able to use selective-display, of course, because the 2nd and later lines won’t be indented at all.

I intend to use it for note taking. I often take a few paragraphs of text, enough that it extends past the height of one screen, and would like to be able to hit a key to collapse down the text so that I see only the first line of each block. Since I use this for notes, it’ll need to work with both fundamental-mode and markdown-mode.

That’s actually it. I don’t think it’s particularly difficult, but it would have a lot of value to me I don’t have the time right now to do it myself (remember the notetaking? I’m kinda busy taking notes to learn elisp).