compositor

See swaywm/sway#6764 (comment)

• Add css focus style
• Focus the primary button with .focus() when a popup is created
• Enter activates the selected button.

This is a very simple shell protocol only allowing for fullscreen surfaces. You can find a very basic implementation here: https://github.com/swaywm/wlroots/blob/master/examples/fullscreen-shell.c

Currently, we do not have pre-built python wheels for OpenImageIO. OpenImageIO is only used for image I/O so it is not necessarily a hard dependency. OpenCV doesn't provide all of the same support for the formats OIIO does, but that is the tradeoff. :/

This issue should implement cv2 (which is already a dependency) as a fallback for image Input and output when OIIO is not installed. It should a