Comment to explain sway_shortcut_state lists

1 files changed, 13 insertions, 0 deletions

diff --git a/include/sway/input/keyboard.h b/include/sway/input/keyboard.h
index c9a8d514..e99a54b1 100644
--- a/include/sway/input/keyboard.h
+++ b/include/sway/input/keyboard.h
@@ -6,7 +6,20 @@
 #define SWAY_KEYBOARD_PRESSED_KEYS_CAP 32
 
 struct sway_shortcut_state {
+        /**
+         * A list of pressed key ids (either keysyms or keycodes),
+         * including duplicates when different keycodes produce the same key id.
+         *
+         * Each key id is associated with the keycode (in `pressed_keycodes`)
+         * whose press generated it, so that the key id can be removed on
+         * keycode release without recalculating the transient link between
+         * keycode and key id at the time of the key press.
+         */
         uint32_t pressed_keys[SWAY_KEYBOARD_PRESSED_KEYS_CAP];
+        /**
+         * The list of keycodes associated to currently pressed key ids,
+         * including duplicates when a keycode generates multiple key ids.
+         */
         uint32_t pressed_keycodes[SWAY_KEYBOARD_PRESSED_KEYS_CAP];
         int last_key_index;
 };