feat: add wayland impl for custom mime types

src/mime.rs

@@ -0,0 +1,45 @@
+// need a type that can implement traits for storing custom data
+
+use std::{borrow::Cow, error, fmt};
+
+/// Data that can be loaded from the clipboard.
+pub struct ClipboardLoadData<T>(pub T);
+
+/// Describes the mime types which are accepted.
+pub trait AllowedMimeTypes:
+    TryFrom<(Vec<u8>, String)> + Send + Sync + 'static
+{
+    /// List allowed mime types for the type to convert from a byte slice.
+    ///
+    /// Allowed mime types should be listed in order of decreasing preference,
+    /// most preferred first.
+    fn allowed() -> Cow<'static, [String]>;
+}
+
+/// Can be converted to data with the available mime types.
+pub trait AsMimeTypes {
+    /// List available mime types for this data to convert to a byte slice.
+    fn available(&self) -> Cow<'static, [String]>;
+
+    /// Converts a type to a byte slice for the given mime type if possible.
+    fn as_bytes(&self, mime_type: &str) -> Option<Cow<'static, [u8]>>;
+}
+
+/// Data that can be stored to the clipboard.
+pub struct ClipboardStoreData<T> {
+    /// Clipboard data.
+    pub data: T,
+    /// Available mime types for the clipboard data.
+    pub available_mime_types: Vec<Cow<'static, str>>,
+}
+
+#[derive(Debug, Clone, Copy)]
+pub struct Error;
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "Unsupported mime type")
+    }
+}
+
+impl error::Error for Error {}