Detect bar modifier pressed/released

1 files changed, 24 insertions, 0 deletions

diff --git a/sway/input_state.c b/sway/input_state.c
index 58619d1f..2f40b6c2 100644
--- a/sway/input_state.c
+++ b/sway/input_state.c
@@ -22,12 +22,36 @@ struct key_state {
 
 static struct key_state key_state_array[KEY_STATE_MAX_LENGTH];
 
+static uint32_t modifiers_state;
+
 void input_init(void) {
         int i;
         for (i = 0; i < KEY_STATE_MAX_LENGTH; ++i) {
                 struct key_state none = { 0, 0, 0 };
                 key_state_array[i] = none;
         }
+
+        modifiers_state = 0;
+}
+
+uint32_t modifier_state_changed(uint32_t new_state, uint32_t mod) {
+        if ((new_state & mod) != 0) { // pressed
+                if ((modifiers_state & mod) != 0) { // already pressed
+                        return MOD_STATE_UNCHANGED;
+                } else { // pressed
+                        return MOD_STATE_PRESSED;
+                }
+        } else { // not pressed
+                if ((modifiers_state & mod) != 0) { // released
+                        return MOD_STATE_RELEASED;
+                } else { // already released
+                        return MOD_STATE_UNCHANGED;
+                }
+        }
+}
+
+void modifiers_state_update(uint32_t new_state) {
+        modifiers_state = new_state;
 }
 
 static uint8_t find_key(uint32_t key_sym, uint32_t key_code, bool update) {