tmk_core/common/action.c: refactor for code size; merge multiple `case`s into one (#11943)

* tmk_core/common/report.h: define `enum mouse_buttons` in terms of `#define MOUSE_BTN_MASK()`

* tmk_core/common/action.c: collapse multiple `case KC_MS_BTN[1-8]:` into single `MOUSE_BTN_MASK(action.key.code - KC_MS_BTN1)`

We all love tapping on our keyboards but this is taking the piss.

This saves ~134 bytes on my ATmega32.

1 files changed, 9 insertions, 8 deletions

diff --git a/tmk_core/common/report.h b/tmk_core/common/report.h
index bcf5cab38..606a25964 100644
--- a/tmk_core/common/report.h
+++ b/tmk_core/common/report.h
@@ -34,15 +34,16 @@ enum hid_report_ids {
 };
 
 /* Mouse buttons */
+#define MOUSE_BTN_MASK(n) (1 << (n))
 enum mouse_buttons {
-    MOUSE_BTN1 = (1 << 0),
-    MOUSE_BTN2 = (1 << 1),
-    MOUSE_BTN3 = (1 << 2),
-    MOUSE_BTN4 = (1 << 3),
-    MOUSE_BTN5 = (1 << 4),
-    MOUSE_BTN6 = (1 << 5),
-    MOUSE_BTN7 = (1 << 6),
-    MOUSE_BTN8 = (1 << 7)
+    MOUSE_BTN1 = MOUSE_BTN_MASK(0),
+    MOUSE_BTN2 = MOUSE_BTN_MASK(1),
+    MOUSE_BTN3 = MOUSE_BTN_MASK(2),
+    MOUSE_BTN4 = MOUSE_BTN_MASK(3),
+    MOUSE_BTN5 = MOUSE_BTN_MASK(4),
+    MOUSE_BTN6 = MOUSE_BTN_MASK(5),
+    MOUSE_BTN7 = MOUSE_BTN_MASK(6),
+    MOUSE_BTN8 = MOUSE_BTN_MASK(7)
 };
 
 /* Consumer Page (0x0C)