Keyboard Events

Scope

The Sky keyboard API is intended to handle the following:

reporting raw key down/up events from physical keyboards ("Alt" down, "E" down, "E" up, "Alt" up)
reporting simulated raw key down/up events from virtual keyboards, if the keyboard provides them
IME
- reporting input text events from physical and virtual keyboards ("é", autorepeat)
- inline editing of typed word
- backspace
- autocorrect
- editing around app-provided chips
- adjusting editor UI (line height, word spacing, etc)
- replacing selection
- providing per-phrase alternative interpretations
- composing letters
- composing words

TODO(ianh): Write API.