Feature request: make key bindings more Vim-like or allow users to remap key bindings

[qadzek]

Thank you for developing this wonderful application. Sometimes I have a hard time remembering the key bindings, so it would be helpful to make them more Vim-like, or to allow the user to remap the default key bindings.

Here are some ideas how I would remap the default key bindings (a couple are conflicting with current key bindings):

• e, i, or a - edits the active node -> add I and A, where I puts the cursor in front of the first character, A puts the cursor after the last character
• E, I, or A - edits the active node, ignoring the existing text -> use cw or cc instead
• c - centers the active node on the screen -> use zz instead
• v - collapses everything other than the first-level nodes -> use zM instead (similar to folding in Vim)
• V - collapses all the children of the active node -> use zC instead
• b - expands all nodes -> use zR instead
• s - saves with the previous file name (or asks for one if there's none) -> use w instead
• ctrl+h - hides/views hidden nodes -> I already remapped ctrl+h in Tmux to switch Tmux windows, so I can't use this feature at the moment
• ctrl+u in the text editor to remove everything in front of the cursor

[nadrad]

Yeah... I'll add configuration. Although, it only accepts single key bindings now. I have to add key sequence binding as well anyway, because I'm running out of single keys for new features.

[nadrad]

OK, with the last two commits, it's become possible to configure key bindings, and you can also press '?' to see the current key bindings.

[qadzek]

Thanks a lot for adding this feature.

Just a small heads-up: bind end = save and bind home = save isn't working on my system, even though it's showing up when I press the ? key. Binding other keys works without issues.

[nadrad]

Pull the latest version, and with that, change the keys to home_alternative and end_alternative and see whether or not it works (and let me know).

If it didn't work, run h-m-m --echo-keys, press the "home" and "end" keys, see which code is shown on the top-left corner of the screen, and let me know.

[qadzek]

Adding _alternative doesn't solve this issue for my system. Pressing the Home key shows 33 133 61 176, pressing End displays 33 133 64 176. I wasn't really planning on remapping these keys anyway, I just noticed this while experimenting a bit.

[nadrad]

I don't know why your key codes for "home" and "end" keys are different from mine! Regardless, I've set the home_alternative and end_alternative values to those, in case someone needs them.