Support text editing shorcuts

[kenden]

It would be nice if the full range of text editing shorcuts worked:

On Macs:

Movement
Cmd-UpArrow: Go to start of the file
Cmd-LeftArrow: Go to start of the line
Cmd-RightArrow: Go to end of the line
Cmd-DownArrow: Go to end of the file

Alt-LeftArrow: Go to start of previous word
Alt-RightArrow: Go to start of next word

Selection
Shift-Cmd-UpArrow: Select from current position to start of the file
Shift-Cmd-LeftArrow: Select from current position to start of the line
Shift-Cmd-RightArrow: Select from current position to end of the line
Shift-Cmd-DownArrow: Select from current position to end of the file

Shift-Alt-LeftArrow: Select from current position to start of previous word
Shift-Alt-RightArrow: Select from current position to start of next word

Deletion
Cmd-Backspace: Delete until the start of the line
Cmd-Delete: Delete until the end of the line

Alt-Backspace: delete until end of previous word
Alt-Delete: delete until end of next word

Jump to previous/next word: #12
Select to previous/next word: #13

[zyedidia]

I think most of these will be possible to implement, although they will only work on a subset of terminals which support these kinds of keybindings. I believe all relatively modern terminals support this stuff though. Unfortunately tcell does not support these keybindings out of the box, but I might be able add them anyway.

Of course, I will need to use Ctrl instead of Cmd for all these keybindings. See #19.

[Red5d]

Sortof related to this, the Home and End keys don't seem to work yet.

[slnt]

Tagging onto this, also appreciated would be some Sublime/Atom like commands such as:

Ctrl-l: select line under cursor
Ctrl-d: select word under cursor, subsequent inputs of this will select the next occurrence of the current selection.

Another small nit I have is when selecting text with the mouse, it would be nice if it highlighted as you go rather than when you release the mouse.

Great work, love having this!

[zyedidia]

It should highlight as you go, unless your terminal doesn't support mouse tracking. What terminal are you using?

Also, I'm currently using Ctrl-d for half page down. Does Sublime/Atom have a keybinding for this that I could use instead?

[slnt]

OS X Terminal.app, but I'm inside of a tmux. Hmmm, works find outside of tmux.

Looks like sublime support keyboard scrolling functionality but don't have key bindings set by default.
Perhaps alt-uparrow and alt-downarrow? Personally that feels a bit more intuitive than ctrl-u and ctrl-d, but just my 2c.

[pscollins]

Maybe a nice solution to this would be to read off configuration from a file, and ship it with sensible defaults? Assigning meaning to keybindings borders on holy war territory.

[slnt]

I think @pscollins has the way of it. :)

[bentranter]

@zyedidia do you think it'd be better to try to add more keypress events to tcell, or to look for an alternative solution for dealing with keybindings? I feel like most of these aren't possible until those keybindings are easily detectable. I also do really like @pscollins idea about a config file

[pscollins]

I guess the first step towards making it configurable would be defining what actions there should be: move-word-forward, move-word-back, page-up, page-down, etc.

[zyedidia]

Yeah, that's what I was planning on doing. This configuration could go in the ~/.config/micro/settings.json file. For example:

{
    "syntax": true,
    "keybindings": {
        "CtrlC": "copy",
        "CtrlV": "paste"
    }
}

[zyedidia]

A bunch of these keybindings are now supported (using Ctrl instead of Cmd). See #79.

[bendem]

Using current master (6c99eea) I'm still seeing ctrl+arrows doing nothing and alt+arrows inserting [1;3C or [1;3D.