Leader key implementation (#326)

* implements leader key for planck experimental

* allows override of leader timeout

* adds ability to use the leader key in seq

* fixes leader keycode

* adds chording prototype

* fixes keycode detection

* moves music mode to quantum.c

* disables chording by default

* updates process_action functions to return bool

2 files changed, 5 insertions, 4 deletions

diff --git a/keyboard/atomic/atomic.c b/keyboard/atomic/atomic.c
index b4b261457..fa218a48f 100644
--- a/keyboard/atomic/atomic.c
+++ b/keyboard/atomic/atomic.c
@@ -11,8 +11,9 @@ void matrix_scan_user(void) {
 }
 
 __attribute__ ((weak))
-void process_action_user(keyrecord_t *record) {
+bool process_action_user(keyrecord_t *record) {
     // leave this function blank - it can be defined in a keymap file
+    return true;
 }
 
 __attribute__ ((weak))
@@ -45,11 +46,11 @@ void matrix_scan_kb(void) {
     matrix_scan_user();
 }
 
-void process_action_kb(keyrecord_t *record) {
+bool process_action_kb(keyrecord_t *record) {
     // put your per-action keyboard code here
     // runs for every action, just before processing by the firmware
 
-    process_action_user(record);
+    return process_action_user(record);
 }
 
 void led_set_kb(uint8_t usb_led) {
diff --git a/keyboard/atomic/atomic.h b/keyboard/atomic/atomic.h
index 845a9043e..2d6b4c6cb 100644
--- a/keyboard/atomic/atomic.h
+++ b/keyboard/atomic/atomic.h
@@ -29,7 +29,7 @@
 
 void matrix_init_user(void);
 void matrix_scan_user(void);
-void process_action_user(keyrecord_t *record);
+bool process_action_user(keyrecord_t *record);
 void led_set_user(uint8_t usb_led);
 void backlight_init_ports(void);