Why shift is hardcoded here ?

[0b-s3rv3r]

tui-textarea/src/input/termion.rs

Line 51 in 39075bb

shift: false,

Why shift is hardcoded here as always false ? This is why I can't make combinations like Shift+Enter for example.

[0b-s3rv3r]

It's very misleading, when I write something like this for example and It always receives false.

Input {
                    key: Key::Enter,
                    ctrl: false,
                    shift: is_shift,
                    ..
} => {
   if is_shift {
   textarea.insert_new_line();
   }
}          

[ProHaller]

I've got the same issue! I've been agonizing over it. Any way to activate it?

[0b-s3rv3r]

I guess we can use crossterm::event::KeyCode, instead of using Input from tui-textarea, because KeyCode implements Into<Input>, but i didn't check if it works.

        let timeout = Duration::from_millis(10);
        if event::poll(timeout)? {
            if let Event::Key(key_event) = event::read()? {
                match key_event.code {
                    KeyCode::Enter if key_event.modifiers.contains(KeyModifiers::Shift) => {}
                    _ => self.textarea.input(key_event.into())
                }
            }
         }

[0b-s3rv3r]

I've checked this and with crossterm::KeyCode it also doesn't work. Idk why.

[rhysd]

Why shift is hardcoded here ?

Because termion does not provide a way to handle shift modifier state.

termion::Event::Key provides Ctrl(char) and Alt(char) events so we can handle the state of ctrl and alt modifier keys. However, same functionality is not provided for shift key.

https://docs.rs/termion/latest/termion/event/enum.Key.html

There are some key combinatons with shift key like ShiftUp, ShiftLeft, ... but there is no Shift(char) generic event.

Instead, termion sends the input key as-is. For example, when Shift + a is pressed with US keyboard, termion sends Char('A'). We cannot know how the 'A' was sent. Generally it was sent by Shift + a, but it is completely up to user's keyboard layout.

So I thought shift field could not be set in the from function. You may somehow set the shift field properly later.

If there is a nice way to properly set the shift key in the from function without assuming user's keyboard layout, PR is welcome.

[rhysd]

I added some more combinations with arrow keys at 0e32eed.

termion added support for those combinations at v4. As long as shift + arrow keys combinations, shift field is set properly.

redox-os/termion@3b52dc9