Vendor dependencies for 0.3.0 release

vendor/core-graphics/src/event_source.rs

@@ -0,0 +1,46 @@
+use core_foundation::base::{CFRelease, CFRetain, CFTypeID};
+use foreign_types::ForeignType;
+
+/// Possible source states of an event source.
+#[repr(C)]
+#[derive(Clone, Copy, Debug)]
+pub enum CGEventSourceStateID {
+    Private = -1,
+    CombinedSessionState = 0,
+    HIDSystemState = 1,
+}
+
+foreign_type! {
+    #[doc(hidden)]
+    pub unsafe type CGEventSource {
+        type CType = crate::sys::CGEventSource;
+        fn drop = |p| CFRelease(p as *mut _);
+        fn clone = |p| CFRetain(p as *const _) as *mut _;
+    }
+}
+
+impl CGEventSource {
+    pub fn type_id() -> CFTypeID {
+        unsafe { CGEventSourceGetTypeID() }
+    }
+
+    pub fn new(state_id: CGEventSourceStateID) -> Result<Self, ()> {
+        unsafe {
+            let event_source_ref = CGEventSourceCreate(state_id);
+            if !event_source_ref.is_null() {
+                Ok(Self::from_ptr(event_source_ref))
+            } else {
+                Err(())
+            }
+        }
+    }
+}
+
+#[cfg_attr(feature = "link", link(name = "CoreGraphics", kind = "framework"))]
+extern "C" {
+    /// Return the type identifier for the opaque type `CGEventSourceRef'.
+    fn CGEventSourceGetTypeID() -> CFTypeID;
+
+    /// Return a Quartz event source created with a specified source state.
+    fn CGEventSourceCreate(stateID: CGEventSourceStateID) -> crate::sys::CGEventSourceRef;
+}