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//! OSC 52 escape sequence to set clipboard contents.
//!
//! This provider can set clipboard contents by outputting a sequence to stdout in supported
//! terminals. It uses Xterm escape sequences, OSC 52 to be exact.
//!
//! Getting clipboard contents is not supported through this context and will error.
//!
//! ## Benefits
//!
//! - Keeps contents in clipboard for the terminal lifetime even after your application exists.
//!
//! ## Drawbacks
//!
//! - Requires terminal that supports these escape codes.
//! - Doesn't catch errors while setting clipboard contents.
//! - Cannot get clipboard contents.
//!
//! # Examples
//!
//! ```rust,no_run
//! use copypasta_ext::prelude::*;
//! use copypasta_ext::x11_bin::X11BinClipboardContext;
//!
//! let mut ctx = X11BinClipboardContext::new().unwrap();
//! ctx.set_contents("some string".into()).unwrap();
//! ```
//!
//! Use `new_with` to combine with another context such as [`X11ClipboardContext`][X11ClipboardContext] to support getting clipboard contents as well.
//!
//! ```rust,no_run
//! use copypasta_ext::prelude::*;
//! use copypasta_ext::osc52::Osc52ClipboardContext;
//! use copypasta_ext::x11_bin::X11BinClipboardContext;
//!
//! let mut ctx = Osc52ClipboardContext::new_with(X11BinClipboardContext::new().unwrap()).unwrap();
//! println!("{:?}", ctx.get_contents());
//! ctx.set_contents("some string".into()).unwrap();
//! ```
//!
//! [X11ClipboardContext]: https://docs.rs/copypasta/*/copypasta/x11_clipboard/struct.X11ClipboardContext.html
use std::error::Error as StdError;
use std::fmt;
use base64::engine::Engine;
use crate::combined::CombinedClipboardContext;
use crate::display::DisplayServer;
use crate::prelude::*;
/// Platform specific context.
///
/// Alias for `Osc52ClipboardContext` on supported platforms, aliases to standard
/// `ClipboardContext` provided by `rust-clipboard` on other platforms.
pub type ClipboardContext = Osc52ClipboardContext;
/// OSC 52 escape sequence to set clipboard contents.
///
/// See module documentation for more information.
pub struct Osc52ClipboardContext;
impl Osc52ClipboardContext {
pub fn new() -> Result<Self, Box<dyn StdError>> {
Ok(Self)
}
/// Construct combined with another context for getting the clipboard.
///
/// This clipboard context only supports setting the clipboard contents.
/// You can combine this with the given context to support getting clipboard contents as well
/// to get the best of both worlds.
pub fn new_with<G>(get: G) -> Result<CombinedClipboardContext<G, Self>, Box<dyn StdError>>
where
G: ClipboardProvider,
{
Self::new()?.with(get)
}
/// Combine this context with [`X11ClipboardContext`][X11ClipboardContext].
///
/// This clipboard context only supports setting the clipboard contents.
/// You can combine this with the given context to support getting clipboard contents as well
/// to get the best of both worlds.
pub fn with<G>(self, get: G) -> Result<CombinedClipboardContext<G, Self>, Box<dyn StdError>>
where
G: ClipboardProvider,
{
Ok(CombinedClipboardContext(get, self))
}
}
impl ClipboardProvider for Osc52ClipboardContext {
fn get_contents(&mut self) -> crate::ClipResult<String> {
Err(Error::Unsupported.into())
}
fn set_contents(&mut self, contents: String) -> crate::ClipResult<()> {
// Use OSC 52 escape sequence to set clipboard through stdout
print!(
"\x1B]52;c;{}\x07",
base64::engine::general_purpose::STANDARD.encode(&contents)
);
Ok(())
}
}
impl ClipboardProviderExt for Osc52ClipboardContext {
fn display_server(&self) -> Option<DisplayServer> {
Some(DisplayServer::Tty)
}
fn has_bin_lifetime(&self) -> bool {
false
}
}
/// Represents OSC 52 clipboard related error.
#[derive(Debug)]
#[non_exhaustive]
pub enum Error {
/// Getting clipboard contents is not supported.
Unsupported,
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
Error::Unsupported => write!(
f,
"Getting clipboard contents is not supported through this context"
),
}
}
}
impl StdError for Error {
fn source(&self) -> Option<&(dyn StdError + 'static)> {
None
}
}