Core::File's new `DontCreate` open mode removes the need for these
capabilities on SpiceAgent. We shouldn't have to create this file,
as if it doesn't exist, QEMU never initiated a spice connection!
Now, we write the data recieved to a file when the user drags a file
onto the Spice Viewer window. Once complete, the FileExplorer will open
with the copied file highlighted.
The old message system was very dependent on syscalls, and the overall
structure made it hard to implement new features.
The new message system is pretty expandible, where each message has its
own dedicated class. As well as this, we now use Core::File and
AK::Stream for reading and writing messages.
Using AK::Stream also allows us to change the actual data source
(in this case, Core::File) without having to update a whole lot of code
in the future.
This is needed later in the program when doing unveil on the path of
"/tmp/session/%sid/portal/clipboard", because %sid is translated to the
root session ID which therefore relies on access to the /proc/all node.
Each of these strings would previously rely on StringView's char const*
constructor overload, which would call __builtin_strlen on the string.
Since we now have operator ""sv, we can replace these with much simpler
versions. This opens the door to being able to remove
StringView(char const*).
No functional changes.
A SPICE agent communicates with the host OS to provide nifty features
like clipboard sharing :^)
This patch implements only plain-text clipboard sharing.
See: github.com/freedesktop/spice-protocol/blob/master/spice/vd_agent.h
