orzo

orzo is a small terminal/screen text Editor in less than 2K lines of Go code. It uses Go's rune (unicode) machinery. Has multiple Buffers. But still single window. hope this makes it into the vault

Usage: orzo `<filename>`

To build: clone repo into gopath;

 $ cd cmd
 $ go get -d ./...
 $ go build -o orzo

Copy to someplace in your PATH

be sure you have https://godoc.org/github.com/nsf/termbox-go so, you may need to go get github.com/nsf/termbox-go

Key Commands:

Movement

CTRL-Y: HELP
Use ArrowKeys to move Cursor around.
Home, End, and PageUp & PageDown should work
CTRL-A: Move to beginning of current line
CTRL-E: Move to end of current line
on mac keyboards:
- FN+ArrowUp: PageUp (screen full)
- FN+ArrowDown: PageDown (screen full)

File/Buffer

CTRL-S: Save the file
CTRL-Q: Quit the Editor
CTRL-F: Find string in file (ESC to exit search mode, arrows to navigate to next/prev find)
CTRL-N: Next Buffer
CTRL-B: List all the Buffers
CTRL-O: (control oh) Open File into new Buffer
CTRL-W: kill Buffer

Cut/Copy/Paste & Deletion

CTRL-Space: Set Mark
CTRL-X: Cut region from Mark to Cursor into paste Buffer
CTRL-C: Copy region from Mark to Cursor into paste Buffer
CTRL-V: Paste copied/cut region into file at Cursor Once you've set the Mark, as you move the cursor, you should be getting underlined text showing the current selection/region.
Delete: to delete a rune backward
CTRL-K: killtoEndOfLine (once) removeLine (twice)

Setting the cursor with a mouse click should work. (and so, it should work to set the selection. but hey, you MUST SetMark for a selection to start... sorry, it's not a real mouse based Editor.)

Implementation Notes

orzo was based on Kilo, a project by Salvatore Sanfilippo at https://github.com/antirez/kilo.

It's a very simple Editor, with kinda-"Mac-Emacs"-like key bindings. It uses `go get github.com/nsf/termbox-go" for simple termio junk.

The central data structure is an array of lines (type erow struct). Each line in the file has a struct, which contains an array of rune. (If you're not familiar with Go's runes, they are Go's unicode code points (or characters))

Multiple Buffers, but no window splits. Two mini modes, one for the search modal operations, and one for opening files.

Notice the goroutine attached to events coming from termbox-go, that is pretty cool. Yet another real reason that Go routines are handy.

orzo was written in Go by K Younger and is released under the BSD 2 clause license.

Orzo interface with WindowServer

a Pty interface, where vt100/ansi terminal codes rule
a Web interface where browser/JS events flow, but only on input.
a light go based window server

kristofer/orzo