Rune is a text editor for the MOSS operating system. It is inspired by Vim and Kakoune, but has its own idea of how to do things.
It will ship with MOSS.
Currently it runs standalone on a Grove.
Run ./build.sh. This copies all the code to your
clipboard. Paste into the startup record of a
Grove. Restart the
Grove to launch the editor.
Rune treats text documents as simple lists of characters— just one byte after another. A document loaded into Rune's memory (or created there) is called the buffer.
Rune has a concept of a selection, which is a slice of the buffer. A selection has two ends, the anchor and the cursor. The cursor is the end that moves around when you issue movement commands. The anchor stays put. The anchor and cursor both represent positions in between characters.
The anchor and cursor may be at the same position, in which case no characters are selected.
The i, j, k, and l keys act like arrow keys. They move the cursor and anchor around one character or line at a time.
Holding shift while pressing the movement keys causes the cursor to move while the anchor stays put, effectively expanding or contracting the selection by one character or line.
Holding the d key while moving horizontally with j and l moves word-by-word.
Holding the d key while moving vertically with i and k moves paragraph-by-paragraph. (A paragraph is considered to be a block of text separated from adjacent paragraphs by a blank line.)
Holding shift while moving in this way expands or contracts the selection.
Pressing the spacebar when in command mode goes into edit mode. While in edit mode, you can type normally to insert characters.
To get out of edit mode, press the semicolon key. This puts the editor into "semicolon mode", a sort of limbo between the edit and command modes. At this point, if you type a space, newline, or semicolon, you will remain in insert mode and a literal semicolon will be inserted. If you press any other key, you will leave insert mode and no semicolon will be inserted.
There is no separate visual mode—to select text, you hold
shift while pressing movement keys.
To get out of insert mode, you press semicolon rather than escape.