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// use std::{cell::RefCell, fmt::Arguments, io::Write, rc::Rc};
// use ansi_term::Style;
// use format::lazy_format;
// pub trait StyledEmitterTrait {
// fn emit(&mut self, fragment: &str, style: Style) -> std::io::Result<()>;
// fn boxed(&mut self) -> StyledEmitter<'_>
// where
// Self: Sized,
// {
// StyledEmitter::Borrowed(self)
// }
// }
// impl<'a> StyledEmitterTrait for &'a mut dyn StyledEmitterTrait {
// fn emit(&mut self, fragment: &str, style: Style) -> std::io::Result<()> {
// StyledEmitterTrait::emit(&mut **self, fragment, style)
// }
// }
// pub enum StyledEmitter<'a> {
// Owned(Box<dyn StyledEmitterTrait + 'a>),
// Borrowed(&'a mut dyn StyledEmitterTrait),
// }
// impl<'a, T> From<T> for StyledEmitter<'a>
// where
// T: StyledEmitterTrait + 'a,
// {
// fn from(value: T) -> Self {
// StyledEmitter::new(value)
// }
// }
// impl<'a> StyledEmitter<'a> {
// pub fn new(emitter: impl StyledEmitterTrait + 'a) -> StyledEmitter<'a> {
// StyledEmitter::Owned(Box::new(emitter))
// }
// pub fn borrowed(emitter: &'a mut dyn StyledEmitterTrait) -> StyledEmitter<'a> {
// StyledEmitter::Borrowed(emitter)
// }
// pub fn styled(writer: EmitWriter<'a>) -> StyledEmitter<'a> {
// StyledEmitter::new(ConcreteStyledEmitter::styled(writer))
// }
// pub fn unstyled(writer: EmitWriter<'a>) -> StyledEmitter<'a> {
// StyledEmitter::new(ConcreteStyledEmitter::unstyled(writer))
// }
// pub fn emit(&mut self, fragment: &str, style: Style) -> std::io::Result<()> {
// match self {
// StyledEmitter::Owned(emitter) => {
// StyledEmitterTrait::emit(&mut **emitter, fragment, style)
// }
// StyledEmitter::Borrowed(emitter) => {
// StyledEmitterTrait::emit(&mut **emitter, fragment, style)
// }
// }
// }
// pub fn done(self) {}
// }
// pub fn emitter(writer: EmitWriter<'_>, styled: bool) -> ConcreteStyledEmitter<'_> {
// ConcreteStyledEmitter { writer, styled }
// }
// pub struct ConcreteStyledEmitter<'a> {
// writer: EmitWriter<'a>,
// styled: bool,
// }
// impl<'a> ConcreteStyledEmitter<'a> {
// pub fn styled(writer: EmitWriter<'a>) -> ConcreteStyledEmitter<'a> {
// ConcreteStyledEmitter {
// writer,
// styled: true,
// }
// }
// pub fn unstyled(writer: EmitWriter<'a>) -> ConcreteStyledEmitter<'a> {
// ConcreteStyledEmitter {
// writer,
// styled: false,
// }
// }
// }
// fn map_io(err: std::fmt::Result) -> std::io::Result<()> {
// err.map_err(|err| std::io::Error::new(std::io::ErrorKind::InvalidData, err))
// }
// impl<'a> StyledEmitterTrait for ConcreteStyledEmitter<'a> {
// fn emit(&mut self, fragment: &str, style: Style) -> std::io::Result<()> {
// if self.styled {
// map_io(write!(self.writer, "{}", style.prefix()))?;
// map_io(write!(self.writer, "{:?}", fragment))?;
// map_io(write!(self.writer, "{}", style.suffix()))?;
// } else {
// map_io(write!(self.writer, "{:?}", fragment))?;
// }
// Ok(())
// }
// }
// pub enum EmitWriter<'a> {
// OwnedIo(Rc<RefCell<dyn std::io::Write + 'a>>),
// BorrowedIo(&'a mut dyn std::io::Write),
// BorrowedFmt(&'a mut dyn std::fmt::Write),
// }
// impl<'a> Write for EmitWriter<'a> {
// fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
// match self {
// EmitWriter::OwnedIo(owned) => owned.borrow_mut().write(buf),
// EmitWriter::BorrowedIo(io) => io.write(buf),
// EmitWriter::BorrowedFmt(fmt) => {
// let str = String::from_utf8_lossy(buf);
// fmt.write_str(&str)
// .map(|_| buf.len())
// .map_err(|err| std::io::Error::new(std::io::ErrorKind::InvalidData, err))
// }
// }
// }
// fn flush(&mut self) -> std::io::Result<()> {
// todo!()
// }
// }
// impl<'a> std::fmt::Debug for EmitWriter<'a> {
// fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
// match self {
// EmitWriter::OwnedIo(_) => write!(f, "OwnedIo"),
// EmitWriter::BorrowedIo(_) => write!(f, "BorrowedIo"),
// EmitWriter::BorrowedFmt(_) => write!(f, "BorrowedFmt"),
// }
// }
// }
// impl<'a> EmitWriter<'a> {
// pub fn owned_io(io: impl std::io::Write + 'a) -> EmitWriter<'a> {
// EmitWriter::OwnedIo(Rc::new(RefCell::new(io)))
// }
// pub fn borrowed_io(io: &'a mut dyn std::io::Write) -> EmitWriter<'a> {
// EmitWriter::BorrowedIo(io)
// }
// pub fn borrowed_fmt(fmt: &'a mut dyn std::fmt::Write) -> EmitWriter<'a> {
// EmitWriter::BorrowedFmt(fmt)
// }
// pub fn child(&mut self) -> EmitWriter<'_> {
// match self {
// EmitWriter::OwnedIo(rc) => EmitWriter::OwnedIo(rc.clone()),
// EmitWriter::BorrowedIo(write) => EmitWriter::BorrowedIo(*write),
// EmitWriter::BorrowedFmt(fmt) => EmitWriter::BorrowedFmt(*fmt),
// }
// }
// }
// impl<'a> EmitWriter<'a> {
// fn write_fmt(&mut self, args: Arguments<'_>) -> std::fmt::Result {
// match self {
// EmitWriter::OwnedIo(owned) => owned
// .borrow_mut()
// .write_fmt(args)
// .map_err(|_| std::fmt::Error),
// EmitWriter::BorrowedIo(borrowed) => {
// borrowed.write_fmt(args).map_err(|_| std::fmt::Error)
// }
// EmitWriter::BorrowedFmt(borrowed) => borrowed.write_fmt(args),
// }
// }
// }