badavi

badavi is a vi-like terminal mode text editor, implemented in C and using the termbox library to draw to the terminal.

It's meant to be a learning exercise and fun project to hack on rather than a serious day-to-day editor, although who knows where it'll end up.

Features supported so far

• Normal, insert, and visual modes.

• Motions -- h, j, k, l, 0, $, ^, {, }, b, B, w, W, e, E, G, g_, ge, gE, gg, %, and more. Motions can be prefixed with an optional count.

• : commands -- :w [path], :wq, :q, :e path and more.

• Split windows with :split (horizontal) and :vsplit (vertical). You can navigate between them with <C-w> hjkl, resize the current window with <C-w> + and <C-w> -, and equalize the layout with <C-w> =.

• Delete (d), change (c) and yank (y) operators, which can be applied to any of the motions, or the visual mode selection. (Text objects aren't implemented yet). The affected region is saved into the unnamed register, used by p to paste text. Named registers from a to z are also implemented, and can be specified by prefixing the operator (or p) with "a through "z.

• Undo (u) and redo (<c-r>) (only single-level for now, unlike vim).

• ctags support -- on startup badavi looks for a tags file called tags in the current directory ('tags' option not supported yet). The :tag command jumps to the specified tag, and <c-]> jumps to the tag of the word under the cursor. <c-t> and :tag can be used to walk up and down the tag stack. The -t command line option can also be passed in to start editing at the given tag, as in e.g. badavi -t main.

• A small subset of the options are implemented. You can manipulate them with :set, :setlocal and :setglobal. These commands accept a similar syntax as vim, e.g. :set number, :set number!, :set nonumber, :set number?, etc. Options can be read from a file with :source path. At startup a file called ~/.badavimrc is sourced.

• Search forwards with /, backwards with ?. Standard POSIX regexes are used, so the syntax is not exactly the same as vim's. For instance, word boundaries are specified with [[:<:]] and [[:>:]] instead of \< and \>. n and N can be used to cycle through matches. * and # can be used to search forwards or backwards for the next occurrence of the word under the cursor. Searching is a motion, so it works with the operators. The 'incsearch' and 'hlsearch' options are also implemented.

Building

Just run make.

License

MIT -- see LICENSE file for details.