From b84d878effd520ac443e600bec95a4164f486618 Mon Sep 17 00:00:00 2001
From: koekeishiya <aasvi93@hotmail.com>
Date: Sun, 13 May 2018 04:37:20 +0200
Subject: #33 initial support media-keys

---
 src/skhd.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 63 insertions(+), 1 deletion(-)

diff --git a/src/skhd.c b/src/skhd.c
index 9f86110..3ca08f8 100644
--- a/src/skhd.c
+++ b/src/skhd.c
@@ -106,6 +106,68 @@ internal EVENT_TAP_CALLBACK(key_handler)
 
         if (result) return NULL;
     } break;
+    case NX_SYSDEFINED: {
+        CFDataRef event_data = CGEventCreateData(kCFAllocatorDefault, event);
+        uint8_t *data = CFDataGetBytePtr(event_data);
+
+#if 0
+        // NOTE(koekeishiya): dump raw event-data for reverse engineering
+        CFIndex length = CFDataGetLength(event_data);
+        for (int i = 0; i < length; ++i) {
+            if (i % 16 == 0) printf("\n");
+            printf("%02X ", data[i]);
+        }
+#endif
+
+        uint8_t event_subtype = data[123];
+        if (event_subtype == 0x08) {
+            uint8_t key_code = data[129];
+            uint8_t key_state = data[130];
+            if (key_state == NX_KEYDOWN) {
+                switch (key_code) {
+                case NX_KEYTYPE_SOUND_UP: {
+                    printf("pressed media_sound_up\n");
+                } break;
+                case NX_KEYTYPE_SOUND_DOWN: {
+                    printf("pressed media_sound_down\n");
+                } break;
+                case NX_KEYTYPE_MUTE: {
+                    printf("pressed media_mute\n");
+                } break;
+                case NX_KEYTYPE_PLAY: {
+                    printf("pressed media_play\n");
+                } break;
+                case NX_KEYTYPE_PREVIOUS: {
+                    printf("pressed media_prev\n");
+                } break;
+                case NX_KEYTYPE_NEXT: {
+                    printf("pressed media_next\n");
+                } break;
+                case NX_KEYTYPE_REWIND: {
+                    printf("pressed media_rewind\n");
+                } break;
+                case NX_KEYTYPE_FAST: {
+                    printf("pressed media_fast\n");
+                } break;
+                case NX_KEYTYPE_BRIGHTNESS_UP: {
+                    printf("pressed media_brightness_up\n");
+                } break;
+                case NX_KEYTYPE_BRIGHTNESS_DOWN: {
+                    printf("pressed media_brightness_down\n");
+                } break;
+                case NX_KEYTYPE_ILLUMINATION_UP: {
+                    printf("pressed media_brightness_up\n");
+                } break;
+                case NX_KEYTYPE_ILLUMINATION_DOWN: {
+                    printf("pressed media_brightness_down\n");
+                } break;
+                default: {
+                    printf("pressed system-key %d\n", key_code);
+                } break;
+                }
+            }
+        }
+    } break;
     }
     return event;
 }
@@ -201,7 +263,7 @@ int main(int argc, char **argv)
     signal(SIGCHLD, SIG_IGN);
 
     struct event_tap event_tap;
-    event_tap.mask = (1 << kCGEventKeyDown);
+    event_tap.mask = (1 << kCGEventKeyDown) | CGEventMaskBit(NX_SYSDEFINED);
     event_tap_begin(&event_tap, key_handler);
 
     struct hotloader hotloader = {};
-- 
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