add haptics (#93)

src/appkit/haptics.rs

@@ -0,0 +1,79 @@
+use std::convert::TryFrom;
+
+use objc::{class, msg_send, runtime::Object, sel, sel_impl};
+use objc_id::ShareId;
+
+use crate::foundation::NSUInteger;
+
+#[derive(Clone, Debug)]
+pub struct HapticFeedbackPerformer(pub ShareId<Object>);
+
+impl HapticFeedbackPerformer {
+    pub fn perform(&self, pattern: FeedbackPattern, performance_time: PerformanceTime) {
+        unsafe {
+            let _: () = msg_send![&*self.0, performFeedbackPattern: pattern performanceTime: performance_time];
+        }
+    }
+}
+
+impl Default for HapticFeedbackPerformer {
+    /// Returns the default haptic feedback performer.
+    fn default() -> Self {
+        HapticFeedbackPerformer(unsafe {
+            let manager = msg_send![class!(NSHapticFeedbackManager), defaultPerformer];
+            ShareId::from_ptr(manager)
+        })
+    }
+}
+
+#[derive(Clone, Copy, Debug)]
+pub enum PerformanceTime {
+    Default = 0,
+    Now = 1,
+    DrawCompleted = 2
+}
+
+impl Default for PerformanceTime {
+    fn default() -> Self {
+        Self::Default
+    }
+}
+
+impl TryFrom<f64> for PerformanceTime {
+    type Error = &'static str;
+
+    fn try_from(value: f64) -> Result<Self, Self::Error> {
+        match value as u8 {
+            0 => Ok(Self::Default),
+            1 => Ok(Self::Now),
+            2 => Ok(Self::DrawCompleted),
+            _ => Err("Invalid performance time")
+        }
+    }
+}
+
+#[derive(Clone, Copy, Debug)]
+pub enum FeedbackPattern {
+    Generic = 0,
+    Alignment = 1,
+    LevelChange = 2
+}
+
+impl Default for FeedbackPattern {
+    fn default() -> Self {
+        Self::Generic
+    }
+}
+
+impl TryFrom<f64> for FeedbackPattern {
+    type Error = &'static str;
+
+    fn try_from(value: f64) -> Result<Self, Self::Error> {
+        match value as u8 {
+            0 => Ok(Self::Generic),
+            1 => Ok(Self::Alignment),
+            2 => Ok(Self::LevelChange),
+            _ => Err("Invalid feedback pattern")
+        }
+    }
+}

src/appkit/mod.rs

@@ -27,3 +27,5 @@ pub mod menu;
 pub mod printing;
 pub mod toolbar;
 pub mod window;
+
+pub mod haptics;