trait based event system

packages/html/src/events/clipboard.rs

@@ -1,10 +1,79 @@
 use dioxus_core::Event;
 
 pub type ClipboardEvent = Event<ClipboardData>;
-#[cfg_attr(feature = "serialize", derive(serde::Serialize, serde::Deserialize))]
-#[derive(Debug, Clone, PartialEq, Eq)]
+
 pub struct ClipboardData {
-    // DOMDataTransfer clipboardData
+    inner: Box<dyn HasClipboardData>,
+}
+
+impl<E: HasClipboardData> From<E> for ClipboardData {
+    fn from(e: E) -> Self {
+        Self { inner: Box::new(e) }
+    }
+}
+
+impl std::fmt::Debug for ClipboardData {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("ClipboardData").finish()
+    }
+}
+
+impl PartialEq for ClipboardData {
+    fn eq(&self, _other: &Self) -> bool {
+        true
+    }
+}
+
+impl ClipboardData {
+    pub fn new(inner: impl HasClipboardData) -> Self {
+        Self {
+            inner: Box::new(inner),
+        }
+    }
+
+    pub fn downcast<T: 'static>(&self) -> Option<&T> {
+        self.inner.as_ref().as_any().downcast_ref::<T>()
+    }
+}
+
+#[cfg(feature = "serialize")]
+#[derive(serde::Serialize, serde::Deserialize)]
+struct SerializedClipboardData {}
+
+#[cfg(feature = "serialize")]
+impl From<&ClipboardData> for SerializedClipboardData {
+    fn from(_: &ClipboardData) -> Self {
+        Self {}
+    }
+}
+
+#[cfg(feature = "serialize")]
+impl HasClipboardData for SerializedClipboardData {
+    fn as_any(&self) -> &dyn std::any::Any {
+        self
+    }
+}
+
+#[cfg(feature = "serialize")]
+impl serde::Serialize for ClipboardData {
+    fn serialize<S: serde::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
+        SerializedClipboardData::from(self).serialize(serializer)
+    }
+}
+
+#[cfg(feature = "serialize")]
+impl<'de> serde::Deserialize<'de> for ClipboardData {
+    fn deserialize<D: serde::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
+        let data = SerializedClipboardData::deserialize(deserializer)?;
+        Ok(Self {
+            inner: Box::new(data),
+        })
+    }
+}
+
+pub trait HasClipboardData: std::any::Any {
+    /// return self as Any
+    fn as_any(&self) -> &dyn std::any::Any;
 }
 
 impl_event![