iamb: Mapping Modes

[fuguesoft]

Duplicate of ulyssa/iamb #411

This request is a bit complicated to explain. Essentially I would like to be able to specify which commands go to which types of buffers/windows.

For example, from anywhere in normal mode, I could <S-j> to move the cursor down in the last active Rooms window. Conversely, <S-k> would move the cursor up. I could of course specify the bindings in my config:

[global_macros.normal]
channel_cursor = {
    target = "window_class.rooms"
    binding = {
        <S-j> = "cursor down"
        <S-k> = "cursor up"
    }
}

Another example would be being able to configure commands specifically for scrollback:

[global_macros.normal]
scrollback_cursor = {
    target = "window_class.scrollback"
    binding = {
        "a" = ":react" # React to a message
        "d" = ":redact<CR>" # Redact a message
        "e" = ":edit<CR>" # Edit a message
        "o" = ":open<CR>" # Open a link
        "r" = ":reply<CR>" # Reply to a message
    }
}

I don't know how the modes/windows/buffers are all configured now but it might be too extreme a rewrite to do something like this