Open notevenaperson opened 2 years ago
[Don't believe anything I say. It's been a long time since I worked on subed or wrote any Elisp.]
I don't think you can do that easily. subed communicates asynchronously with mpv, meaning it sends off a command and immediately continues whatever it was doing, and a callback function is called when the return value arrived.
You would have to come up with a callback system and call
subed-mpv--get-property
(new function you have to write) with the property
name and a callback. The callback would be registered in a global variable, and
subed-mpv--client-handle-event
would call it when it gets the property value.
Another way would be to write subed-mpv--client-send-synchronously
, which
would send the command, wait for the return value and return it. Maybe Elisp has
something like process-send-string
that blocks until the response
arrives. Otherwise, you would have to tell subed-mpv--client-handle-event
that
you are waiting for something and to notify you when it's there.
Have fun! :)
Do you want to take advantage of the subed-mpv-video-file variable for getting the path, at least? Maybe you can query it outside the mpv process and just ask the user which subtitle to use. I haven't figured out a good pattern for the other things you want to do yet, sorry.
mpv.el (which subed doesn't use) has a mpv-run-command that blocks while waiting for a response. I wonder if we can use something like that...
https://github.com/kljohann/mpv.el/blob/master/mpv.el#L166=
Nice find! That seems to do exactly what is needed. Looks like cl-block is what we should use.
Mpv's JSON IPC documentation describes getting replies, such as with the command
get_property
. Browsing in subed's code for examples, I was surprised subed doesn't rely on reading properties to work, rather its reply handling seems to be built around events (subed-mpv--client-filter
andsubed-mpv--client-handle-*
). In summary I couldn't find examples of getting a property from mpv, so I'm asking here how to do that.An extension I'm making to the subed package needs to read a few properties from mpv.
subed-mpv--client-send
can send commands to the JSON IPC, but I just can't figure out how to send a command and see the reply, or e.g. put in a variable.To give some more background, this is a function in what I'm working on. For now, the function
get_property
is a placeholder.