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//! Access the clipboard.
/// A buffer for short-term storage and transfer within and between
/// applications.
pub trait Clipboard {
/// Reads the current content of the [`Clipboard`] as text.
fn read(&self) -> Option<String>;
/// Writes the given text contents to the [`Clipboard`].
fn write(&mut self, contents: String);
}
/// A null implementation of the [`Clipboard`] trait.
#[derive(Debug, Clone, Copy)]
pub struct Null;
impl Clipboard for Null {
fn read(&self) -> Option<String> {
None
}
fn write(&mut self, _contents: String) {}
}
pub enum Action<T> {
Read(Box<dyn Fn(Option<String>) -> T>),
Write(String),
}
impl<T> Action<T> {
pub fn map<A>(self, f: impl Fn(T) -> A + 'static + Send + Sync) -> Action<A>
where
T: 'static,
{
match self {
Self::Read(o) => Action::Read(Box::new(move |s| f(o(s)))),
Self::Write(content) => Action::Write(content),
}
}
}
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