Function is_text_modifiers 

pub fn is_text_modifiers(modifiers: KeyModifiers) -> bool

Whether a Char key with modifiers is a typed character rather than a chord.

Shift alone is text (capitals). Ctrl or Alt alone is a chord. Ctrl and Alt together are text too: that is how Windows reports AltGr, which many layouts need for \, @, | or ~ — on Spanish (Latin America) \ is AltGr plus the key left of 1. The console also replays pasted text as one keystroke per character with the modifiers the layout needs, so treating AltGr as a chord dropped every backslash of a pasted Windows path.

use crossterm::event::KeyModifiers;
use trail::input::is_text_modifiers;

assert!(is_text_modifiers(KeyModifiers::SHIFT));
assert!(is_text_modifiers(KeyModifiers::CONTROL | KeyModifiers::ALT));
assert!(!is_text_modifiers(KeyModifiers::CONTROL));
assert!(!is_text_modifiers(KeyModifiers::ALT));