platform context helper functions?

[kendonB]

I'm starting to do some cross platforming for Caster. There are many places where the same action just has a slightly different key combination depending on the platform. Something like WindowsContext, MacOSContext, and LinuxContext functions would be really helpful. I've been trying to write these based on FuncContext and sys.platform == "win32", sys.platform == "darwin" and sys.platform == "linux" but haven't figured it out. Any help?

[kendonB]

Ok funccontext was not it. This seems to work. Is this right?

class LinuxContext(Context):
    def __init__(self):
        self._str = "Test for linux"

    def matches(self, executable, title, handle):
        return sys.platform == "linux"

[drmfinlay]

Hi @kendonB. It's good you're working on cross-platforming Caster.

Your Context class should work I think. You can do platform contexts with FuncContext like this:

import os
import sys

from dragonfly import FuncContext

windows_context = FuncContext(lambda: sys.platform == "win32")
darwin_context = FuncContext(lambda: sys.platform == "darwin")  # Darwin == MacOS
linux_context = FuncContext(lambda: sys.platform.startswith("linux"))
x11_context = FuncContext(lambda: os.environ.get("XDG_SESSION_TYPE") == "x11")

As for the slightly different key combinations, this has come up before in this discussion in the Caster gitter channel involving @amatveie, @LexiconCode and myself. Implementing an extensible way of solving this problem is quite complicated, as cross-platform support usually is. I have some notes on it, but I can't really commit to developing it myself. I'll try to put my notes up here soon.

[kendonB]

Those commands above will work fine - will close. Thanks!