From 031a0af4993e8fad33d49d9c3cfa936a205b7c79 Mon Sep 17 00:00:00 2001
From: Teddy Wing
Date: Sat, 27 Oct 2018 06:19:28 +0200
Subject: HeadphoneKey: Only print `NSLog`s in a debug mode

Add a new `LogDebug` macro that `NSLog`s when a `DOME_KEY_DEBUG`
environment variable is set to "1".

This gets rid of the verbose output every time a headphone key is
pressed. But it enables you to see it if needed for debugging purposes.
---
 DomeKey/HeadphoneKey.h |  1 +
 DomeKey/HeadphoneKey.m |  8 ++++----
 DomeKey/log.h          | 10 ++++++++++
 3 files changed, 15 insertions(+), 4 deletions(-)
 create mode 100644 DomeKey/log.h

diff --git a/DomeKey/HeadphoneKey.h b/DomeKey/HeadphoneKey.h
index be0e62c..618bdd2 100644
--- a/DomeKey/HeadphoneKey.h
+++ b/DomeKey/HeadphoneKey.h
@@ -10,6 +10,7 @@
 #import <DDHidLib/DDHidAppleMikey.h>
 
 #import "dome_key_map.h"
+#import "log.h"
 
 typedef enum KeyPress : BOOL {
     KeyPressDown = YES,
diff --git a/DomeKey/HeadphoneKey.m b/DomeKey/HeadphoneKey.m
index 5cf0806..df31fec 100644
--- a/DomeKey/HeadphoneKey.m
+++ b/DomeKey/HeadphoneKey.m
@@ -56,15 +56,15 @@
     if (upOrDown == KeyPressUp) {
         switch (usageId) {
         case kHIDUsage_Csmr_PlayOrPause:
-            NSLog(@"Middle");
+            LogDebug(@"Middle");
             [self handleDeadKey:HeadphoneButton_Play];
             break;
         case kHIDUsage_Csmr_VolumeIncrement:
-            NSLog(@"Top");
+            LogDebug(@"Top");
             [self handleDeadKey:HeadphoneButton_Up];
             break;
         case kHIDUsage_Csmr_VolumeDecrement:
-            NSLog(@"Bottom");
+            LogDebug(@"Bottom");
             [self handleDeadKey:HeadphoneButton_Down];
             break;
         }
@@ -88,7 +88,7 @@
 
 - (void)runAction
 {
-    NSLog(@"%@", _key_buffer);
+    LogDebug(@"%@", _key_buffer);
 
     NSUInteger count = [_key_buffer count];
     HeadphoneButton buttons[count];
diff --git a/DomeKey/log.h b/DomeKey/log.h
new file mode 100644
index 0000000..7684143
--- /dev/null
+++ b/DomeKey/log.h
@@ -0,0 +1,10 @@
+#ifndef LOG_H
+#define LOG_H
+
+#define LogDebug(...) \
+    if ([[[[NSProcessInfo processInfo] environment] \
+        objectForKey:@"DOME_KEY_DEBUG"] isEqualToString:@"1"]) { \
+        NSLog(__VA_ARGS__); \
+    }
+
+#endif /* LOG_H */
-- 
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