Add RapidFire module

docs/rapidfire.md

@@ -0,0 +1,43 @@
+# RapidFire
+
+The RapidFire module lets a user send repeated key presses while a key is held.
+
+Some instances where this may be useful are:
+
+- MMOs and other games where you are encouraged to repeatedly spam a key
+- More responsive volume up and volume down
+- Faster cursor key navigation
+- Anywhere else you may need an ergonomic alternative to repetitive key tapping
+
+## Keycodes
+
+| Key     | Description                                          |
+| :------ | :--------------------------------------------------- |
+| `KC.RF` | Repeatedly sends the specified keycode while pressed |
+
+## Usage
+
+Each repeat counts as one full cycle of pressing and releasing. RapidFire works with chording (i.e., holding Shift plus a RapidFire key will repeatedly send the shifted version of that RapidFire key) and chaining (i.e., `KC.RF(KC.LSHIFT(KC.A))`. Multiple RapidFire keys can be held down at the same time, and their timers work independently of each other.
+
+The RapidFire keycode has a few different options:
+
+|        Option         | Default Value | Description                                                                                                                                                  |
+| :-------------------: | :-----------: | :----------------------------------------------------------------------------------------------------------------------------------------------------------- |
+|       `repeat`        |     `100`     | The delay between repeats. Note: `2` appears to be the minimum effective value. If you run into issues, try increasing this value.           |
+|        `wait`         |     `200`     | The delay before starting to repeat. Useful if you want to be able to type with keys that have a low `repeat` value. |
+|  `randomize_repeat`   |    `False`    | Randomize the value of `repeat`. Useful for making the repetitive input look human in instances where you may be flagged as a bot otherwise.                 |
+| `randomize_magnitude` |     `15`      | The magnitude of the randomization. If randomization is enabled, the repeat delay will be `repeat` plus or minus a random value up to this amount.           |
+
+### Example Code
+
+```python
+from kmk.modules.rapidfire import RapidFire
+
+keyboard.modules.append(RapidFire())
+
+# After 200 milliseconds, repeatedly send Shift+A every 75-125 milliseconds while the RapidFire key is held 
+keyboard.keymap = [[
+    KC.RF(KC.LSFT(KC.A), wait=200, repeat=100, randomize_repeat=True, randomize_magnitude=25)
+    ]]
+
+```

kmk/modules/rapidfire.py

@@ -0,0 +1,82 @@
+from kmk.keys import make_argumented_key
+from kmk.modules import Module
+from random import randint
+
+
+class RapidFireMeta:
+    def __init__(
+        self,
+        kc,
+        repeat=100,
+        wait=200,
+        randomize_repeat=False,
+        randomize_magnitude=15,
+    ):
+        self.kc = kc
+        self.repeat = repeat
+        self.wait = wait
+        self.randomize_repeat = randomize_repeat
+        self.randomize_magnitude = randomize_magnitude
+
+
+class RapidFire(Module):
+    _active_keys = {}
+
+    def __init__(self):
+        make_argumented_key(
+            validator=RapidFireMeta,
+            names=("RF",),
+            on_press=self._rf_pressed,
+            on_release=self._rf_released,
+        )
+
+    def _get_repeat(self, key):
+        if key.meta.randomize_repeat:
+            return key.meta.repeat + randint(
+                -key.meta.randomize_magnitude, key.meta.randomize_magnitude
+            )
+        return key.meta.repeat
+
+    def _on_repeat_timeout(self, key, keyboard):
+        keyboard.tap_key(key.meta.kc)
+        repeat_timeout_key = keyboard.set_timeout(
+            self._get_repeat(key),
+            lambda: self._on_repeat_timeout(key, keyboard),
+        )
+        self._active_keys[key] = repeat_timeout_key
+
+    def _on_wait_timeout(self, key, keyboard):
+        self._on_repeat_timeout(key, keyboard)
+
+    def _rf_pressed(self, key, keyboard, *args, **kwargs):
+        keyboard.tap_key(key.meta.kc)
+        wait_timeout_key = keyboard.set_timeout(
+            key.meta.wait, lambda: self._on_wait_timeout(key, keyboard)
+        )
+        self._active_keys[key] = wait_timeout_key
+
+    def _rf_released(self, key, keyboard, *args, **kwargs):
+        if key in self._active_keys:
+            keyboard.cancel_timeout(self._active_keys[key])
+            self._active_keys.pop(key)
+
+    def during_bootup(self, keyboard):
+        return
+
+    def before_matrix_scan(self, keyboard):
+        return
+
+    def before_hid_send(self, keyboard):
+        return
+
+    def after_hid_send(self, keyboard):
+        return
+
+    def on_powersave_enable(self, keyboard):
+        return
+
+    def on_powersave_disable(self, keyboard):
+        return
+
+    def after_matrix_scan(self, keyboard):
+        return