Merge pull request #123 from Sydiepus/wlr_keyboard_notify_modifiers

Expose `wlr_keyboard_notify_modifiers` function.

wlroots/ffi_build.py

@@ -1005,6 +1005,13 @@ def has_xwayland() -> bool:
     struct wlr_input_device *input_device);
 """
 
+# wlr/interfaces/wlr_keyboard.h
+CDEF += """
+void wlr_keyboard_notify_modifiers(struct wlr_keyboard *keyboard,
+    uint32_t mods_depressed, uint32_t mods_latched, uint32_t mods_locked,
+    uint32_t group);
+"""
+
 # types/wlr_linux_dmabuf_v1.h
 CDEF += """
 struct wlr_linux_dmabuf_v1 *wlr_linux_dmabuf_v1_create(struct wl_display *display,

wlroots/wlr_types/keyboard.py

@@ -33,6 +33,25 @@ class KeyboardModifier(enum.IntFlag):
     MOD5 = lib.WLR_MODIFIER_MOD5
 
 
+class ModifiersMask:
+    def __init__(self, keyboard: Keyboard) -> None:
+        """The modifiers mask"""
+        self._mask = ffi.new("xkb_mod_mask_t *", 0)
+        self._one = ffi.new("uint32_t *", 1)
+        self._keyboard = keyboard
+
+    def add(self, modifier: str) -> None:
+        """Add a modifier to the mask
+        Numlock is Mod2 and Capslock is Lock
+        """
+        idx = ffi.new("xkb_mod_index_t *")
+        idx[0] = lib.xkb_keymap_mod_get_index(
+            self._keyboard._ptr.keymap,
+            ffi.new("const char []", modifier.encode("ascii")),
+        )
+        self._mask[0] |= self._one[0] << idx[0]
+
+
 class KeyboardKeyEvent(Ptr):
     def __init__(self, ptr) -> None:
         """Event that a key has been pressed or release
@@ -108,6 +127,13 @@ def set_repeat_info(self, rate, delay) -> None:
         """
         lib.wlr_keyboard_set_repeat_info(self._ptr, rate, delay)
 
+    def notify_modifiers(self, mask: ModifiersMask) -> None:
+        """Notify the keyboard that modifiers have been updated"""
+        zero = ffi.new("uint32_t *", 0)
+        lib.wlr_keyboard_notify_modifiers(
+            self._ptr, zero[0], zero[0], mask._mask[0], zero[0]
+        )
+
     @property
     def keycodes(self):
         """Keycodes associated with the keyboard"""