add sequence action

this omits the filter and restore events from the original PR (didn't feel it was necessary): TeXitoi/keyberon#122

README.md

@@ -92,6 +92,8 @@ A huge thanks goes to the following projects:
   - For providing the logic for keyboard matrix and layouts
 - [jtroo's `keyberon` fork](https://github.com/jtroo/kanata/tree/main/keyberon)
   - For the implementation of extra layout actions, like one shot and tap dance keys
+- [riskable and borisfaure](https://github.com/TeXitoi/keyberon/pull/122)
+  - For the implementation of sequences/macros in `keyberon`
 - [simmsb's corne firmware](https://github.com/simmsb/keyboard)
   - Very helpful reference for developing a keyboard firmware using [embassy-rs](https://github.com/embassy-rs/embassy)
 - [TeXitoi's keyseebee project](https://github.com/TeXitoi/keyseebee)

docs/src/content/docs/index.md

@@ -89,6 +89,8 @@ A huge thanks goes to the following projects:
   - For powering the logic for keyboard matrix and layouts
 - [jtroo's `keyberon` fork](https://github.com/jtroo/kanata/tree/main/keyberon)
   - For the implementation of extra layout actions, like one shot and tap dance keys
+- [riskable and borisfaure](https://github.com/TeXitoi/keyberon/pull/122)
+  - For the implementation of sequences/macros in `keyberon`
 - [simmsb's corne firmware](https://github.com/simmsb/keyboard)
   - Very helpful reference for developing a keyboard firmware using [embassy-rs](https://github.com/embassy-rs/embassy)
 - [TeXitoi's keyseebee project](https://github.com/TeXitoi/keyseebee)

keyberon/src/action.rs

@@ -231,6 +231,27 @@ where
     pub config: TapDanceConfig,
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+/// The different tyeps of actions we support for key sequences/macros
+pub enum SequenceEvent<K>
+where
+    K: 'static,
+{
+    /// No operation action: just do nothing (a placeholder).
+    NoOp,
+    /// A keypress/keydown
+    Press(K),
+    /// Key release/keyup
+    Release(K),
+    /// A shortcut for `Press(K), Release(K)`
+    Tap(K),
+    /// For sequences that need to wait a bit before continuing. The number represents how long (in
+    /// ticks) this Delay will last for.
+    Delay(u16),
+    /// Cancels the running sequence and can be used to mark the end of a sequence.
+    Complete,
+}
+
 /// The different actions that can be done.
 #[non_exhaustive]
 #[derive(Debug, Clone, Copy, Eq, PartialEq)]
@@ -283,6 +304,8 @@ where
     /// - `timeout` ticks elapse since the last tap of the same tap-dance key
     /// - the number of taps is equal to the length of `actions`.
     TapDance(&'static TapDanceAction<T, K>),
+    /// An array of SequenceEvents that will be triggered (in order)
+    Sequence(&'static &'static [SequenceEvent<K>]),
     /// Custom action.
     ///
     /// Define a user defined action. This enum can be anything you