keymaps::usages

Function hid_usage_to_input3_key

Source 
pub fn hid_usage_to_input3_key(usage_id: u16) -> Option<Key>
Expand description

Converts a USB HID Usage ID to the corresponding input3 [Key].

The Usage ID is interpreted in the context of Usage Page 0x07 (“Keyboard/Keypad”), except that:

  • 0xe8 is interpreted as Usage Page 0x0c, Usage ID 0xe9 (Volume Increment)
  • 0xe9 is interpreted as Usage Page 0x0c, Usage ID 0xea (Volume Decrement)

These exceptions provide backwards compatibility with Root Presenter’s input pipeline.

§Parameters

  • usage_id: The Usage ID to convert to its input3 [Key] equivalent.

§Future directions

Per https://fxbug.dev/42142534, this method will be replaced with a method that deals in fuchsia.input.Keys, instead of HID Usage IDs.