This adds a "native" Wayland clipboard backend based on the
ext-data-control-v1 protocol.
This backend overcomes the limitation of the VO (Wayland core protocol)
backend, and does not require the presence of the VO window to receive clipboard
updates.
This backend also supports primary selection if supported by the compositor.
The backend runs in a separate thread, so clipboard reading
does not stall the player like the VO backend.
This uses GetClipboardSequenceNumber() to detect clipboard
content changes. Clipboard Format Listener is a better way to
do this according to MS docs, but sequence number works and
the listener requires creating a dedicated thread and HWND
for monitoring, so I will save it for a later time.
This adds a clipboard monitoring API for backends which use polling
to monitor clipboard updates. --clipboard-monitor option can turn
clipboard monitoring on and off at runtime.
This adds a clipboard API with multiple backend and format support.
--clipboard-enable option can be toggled at runtime to turn native
clipboard on and off.
Attila Fidan