feat(extensions): most of the extensions implementation, by kdb424

kmk/extensions/media_keys.py

@@ -0,0 +1,55 @@
+from kmk.extensions import Extension
+from kmk.keys import make_consumer_key
+
+
+class MediaKeys(Extension):
+    def __init__(self):
+        # Consumer ("media") keys. Most known keys aren't supported here. A much
+        # longer list used to exist in this file, but the codes were almost certainly
+        # incorrect, conflicting with each other, or otherwise 'weird'. We'll add them
+        # back in piecemeal as needed. PRs welcome.
+        #
+        # A super useful reference for these is http://www.freebsddiary.org/APC/usb_hid_usages.php
+        # Note that currently we only have the PC codes. Recent MacOS versions seem to
+        # support PC media keys, so I don't know how much value we would get out of
+        # adding the old Apple-specific consumer codes, but again, PRs welcome if the
+        # lack of them impacts you.
+        make_consumer_key(code=226, names=('AUDIO_MUTE', 'MUTE'))  # 0xE2
+        make_consumer_key(code=233, names=('AUDIO_VOL_UP', 'VOLU'))  # 0xE9
+        make_consumer_key(code=234, names=('AUDIO_VOL_DOWN', 'VOLD'))  # 0xEA
+        make_consumer_key(code=181, names=('MEDIA_NEXT_TRACK', 'MNXT'))  # 0xB5
+        make_consumer_key(code=182, names=('MEDIA_PREV_TRACK', 'MPRV'))  # 0xB6
+        make_consumer_key(code=183, names=('MEDIA_STOP', 'MSTP'))  # 0xB7
+        make_consumer_key(
+            code=205, names=('MEDIA_PLAY_PAUSE', 'MPLY')
+        )  # 0xCD (this may not be right)
+        make_consumer_key(code=184, names=('MEDIA_EJECT', 'EJCT'))  # 0xB8
+        make_consumer_key(code=179, names=('MEDIA_FAST_FORWARD', 'MFFD'))  # 0xB3
+        make_consumer_key(code=180, names=('MEDIA_REWIND', 'MRWD'))  # 0xB4
+
+    def on_runtime_enable(self, sandbox):
+        return
+
+    def on_runtime_disable(self, sandbox):
+        return
+
+    def during_bootup(self, sandbox):
+        return
+
+    def before_matrix_scan(self, sandbox):
+        return
+
+    def after_matrix_scan(self, sandbox):
+        return
+
+    def before_hid_send(self, sandbox):
+        return
+
+    def after_hid_send(self, sandbox):
+        return
+
+    def on_powersave_enable(self, sandbox):
+        return
+
+    def on_powersave_disable(self, sandbox):
+        return