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Add OutputHandle enum to use instead of &mut dyn io::Write

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This commit is contained in:
Peter Hebden
2023-07-09 01:08:14 +01:00
committed by David Peter
parent d295b3a394
commit 103a2f0d9b
4 changed files with 107 additions and 52 deletions
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119
src/printer.rs
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@@ -1,4 +1,5 @@
use std::io::Write;
use std::fmt;
use std::io;
use std::vec::Vec;
use nu_ansi_term::Color::{Fixed, Green, Red, Yellow};
@@ -36,21 +37,52 @@ use crate::terminal::{as_terminal_escaped, to_ansi_color};
use crate::vscreen::AnsiStyle;
use crate::wrapping::WrappingMode;
pub enum OutputHandle<'a> {
IoWrite(&'a mut dyn io::Write),
FmtWrite(&'a mut dyn fmt::Write),
}
macro_rules! write_handle {
($dst:expr, $($arg:tt)*) => {
match $dst {
OutputHandle::IoWrite(ref mut handle) => {
write!(handle, $($arg)*).map_err(|e| Error::from(e))
}
OutputHandle::FmtWrite(ref mut handle) => {
write!(handle, $($arg)*).map_err(|e| Error::from(e))
}
}
}
}
macro_rules! writeln_handle {
($dst:expr, $($arg:tt)*) => {
match $dst {
OutputHandle::IoWrite(ref mut handle) => {
writeln!(handle, $($arg)*).map_err(|e| Error::from(e))
}
OutputHandle::FmtWrite(ref mut handle) => {
writeln!(handle, $($arg)*).map_err(|e| Error::from(e))
}
}
}
}
pub(crate) trait Printer {
fn print_header(
&mut self,
handle: &mut dyn Write,
handle: OutputHandle,
input: &OpenedInput,
add_header_padding: bool,
) -> Result<()>;
fn print_footer(&mut self, handle: &mut dyn Write, input: &OpenedInput) -> Result<()>;
fn print_footer(&mut self, handle: OutputHandle, input: &OpenedInput) -> Result<()>;
fn print_snip(&mut self, handle: &mut dyn Write) -> Result<()>;
fn print_snip(&mut self, handle: OutputHandle) -> Result<()>;
fn print_line(
&mut self,
out_of_range: bool,
handle: &mut dyn Write,
handle: OutputHandle,
line_number: usize,
line_buffer: &[u8],
) -> Result<()>;
@@ -69,25 +101,25 @@ impl<'a> SimplePrinter<'a> {
impl<'a> Printer for SimplePrinter<'a> {
fn print_header(
&mut self,
_handle: &mut dyn Write,
_handle: OutputHandle,
_input: &OpenedInput,
_add_header_padding: bool,
) -> Result<()> {
Ok(())
}
fn print_footer(&mut self, _handle: &mut dyn Write, _input: &OpenedInput) -> Result<()> {
fn print_footer(&mut self, _handle: OutputHandle, _input: &OpenedInput) -> Result<()> {
Ok(())
}
fn print_snip(&mut self, _handle: &mut dyn Write) -> Result<()> {
fn print_snip(&mut self, _handle: OutputHandle) -> Result<()> {
Ok(())
}
fn print_line(
&mut self,
out_of_range: bool,
handle: &mut dyn Write,
handle: OutputHandle,
_line_number: usize,
line_buffer: &[u8],
) -> Result<()> {
@@ -98,9 +130,12 @@ impl<'a> Printer for SimplePrinter<'a> {
self.config.tab_width,
self.config.nonprintable_notation,
);
write!(handle, "{}", line)?;
write_handle!(handle, "{}", line)?;
} else {
handle.write_all(line_buffer)?
match handle {
OutputHandle::IoWrite(handle) => handle.write_all(line_buffer)?,
OutputHandle::FmtWrite(handle) => todo!(),
}
};
}
Ok(())
@@ -218,8 +253,8 @@ impl<'a> InteractivePrinter<'a> {
})
}
fn print_horizontal_line_term(&mut self, handle: &mut dyn Write, style: Style) -> Result<()> {
writeln!(
fn print_horizontal_line_term(&mut self, handle: OutputHandle, style: Style) -> Result<()> {
writeln_handle!(
handle,
"{}",
style.paint("─".repeat(self.config.term_width))
@@ -227,13 +262,13 @@ impl<'a> InteractivePrinter<'a> {
Ok(())
}
fn print_horizontal_line(&mut self, handle: &mut dyn Write, grid_char: char) -> Result<()> {
fn print_horizontal_line(&mut self, handle: OutputHandle, grid_char: char) -> Result<()> {
if self.panel_width == 0 {
self.print_horizontal_line_term(handle, self.colors.grid)?;
} else {
let hline = "─".repeat(self.config.term_width - (self.panel_width + 1));
let hline = format!("{}{}{}", "─".repeat(self.panel_width), grid_char, hline);
writeln!(handle, "{}", self.colors.grid.paint(hline))?;
writeln_handle!(handle, "{}", self.colors.grid.paint(hline))?;
}
Ok(())
@@ -257,9 +292,9 @@ impl<'a> InteractivePrinter<'a> {
}
}
fn print_header_component_indent(&mut self, handle: &mut dyn Write) -> std::io::Result<()> {
fn print_header_component_indent(&mut self, handle: OutputHandle) -> Result<()> {
if self.config.style_components.grid() {
write!(
write_handle!(
handle,
"{}{}",
" ".repeat(self.panel_width),
@@ -268,7 +303,7 @@ impl<'a> InteractivePrinter<'a> {
.paint(if self.panel_width > 0 { "│ " } else { "" }),
)
} else {
write!(handle, "{}", " ".repeat(self.panel_width))
write_handle!(handle, "{}", " ".repeat(self.panel_width))
}
}
@@ -285,7 +320,7 @@ impl<'a> InteractivePrinter<'a> {
impl<'a> Printer for InteractivePrinter<'a> {
fn print_header(
&mut self,
handle: &mut dyn Write,
handle: OutputHandle,
input: &OpenedInput,
add_header_padding: bool,
) -> Result<()> {
@@ -295,7 +330,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
if !self.config.style_components.header() {
if Some(ContentType::BINARY) == self.content_type && !self.config.show_nonprintable {
writeln!(
writeln_handle!(
handle,
"{}: Binary content from {} will not be printed to the terminal \
(but will be present if the output of 'bat' is piped). You can use 'bat -A' \
@@ -343,7 +378,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
} else {
// Only pad space between files, if we haven't already drawn a horizontal rule
if add_header_padding && !self.config.style_components.rule() {
writeln!(handle)?;
writeln_handle!(handle,)?;
}
}
@@ -351,7 +386,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
self.print_header_component_indent(handle)?;
match component {
StyleComponent::HeaderFilename => writeln!(
StyleComponent::HeaderFilename => writeln_handle!(
handle,
"{}{}{}",
description
@@ -367,7 +402,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
.size
.map(|s| format!("{}", ByteSize(s)))
.unwrap_or_else(|| "-".into());
writeln!(handle, "Size: {}", self.colors.header_value.paint(bsize))
writeln_handle!(handle, "Size: {}", self.colors.header_value.paint(bsize))
}
_ => Ok(()),
}
@@ -384,7 +419,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
Ok(())
}
fn print_footer(&mut self, handle: &mut dyn Write, _input: &OpenedInput) -> Result<()> {
fn print_footer(&mut self, handle: OutputHandle, _input: &OpenedInput) -> Result<()> {
if self.config.style_components.grid()
&& (self.content_type.map_or(false, |c| c.is_text()) || self.config.show_nonprintable)
{
@@ -394,7 +429,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
}
}
fn print_snip(&mut self, handle: &mut dyn Write) -> Result<()> {
fn print_snip(&mut self, handle: OutputHandle) -> Result<()> {
let panel = self.create_fake_panel(" ...");
let panel_count = panel.chars().count();
@@ -407,13 +442,13 @@ impl<'a> Printer for InteractivePrinter<'a> {
let snip_right =
" ─".repeat((self.config.term_width - panel_count - snip_left_count - title_count) / 2);
writeln!(
writeln_handle!(
handle,
"{}",
self.colors
.grid
.paint(format!("{}{}{}{}", panel, snip_left, title, snip_right))
)?;
);
Ok(())
}
@@ -421,7 +456,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
fn print_line(
&mut self,
out_of_range: bool,
handle: &mut dyn Write,
handle: OutputHandle,
line_number: usize,
line_buffer: &[u8],
) -> Result<()> {
@@ -508,7 +543,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
.map(|d| d.generate(line_number, false, self));
for deco in decorations {
write!(handle, "{} ", deco.text)?;
write_handle!(handle, "{} ", deco.text)?;
cursor_max -= deco.width + 1;
}
}
@@ -526,7 +561,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
// ANSI escape passthrough.
(ansi, true) => {
self.ansi_style.update(ansi);
write!(handle, "{}", ansi)?;
write_handle!(handle, "{}", ansi)?;
}
// Regular text.
@@ -534,7 +569,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
let text = &*self.preprocess(text, &mut cursor_total);
let text_trimmed = text.trim_end_matches(|c| c == '\r' || c == '\n');
write!(
write_handle!(
handle,
"{}",
as_terminal_escaped(
@@ -559,9 +594,13 @@ impl<'a> Printer for InteractivePrinter<'a> {
} else {
0
};
write!(handle, "{}", ansi_style.paint(" ".repeat(width)))?;
write_handle!(
handle,
"{}",
ansi_style.paint(" ".repeat(width))
)?;
}
write!(handle, "{}", &text[text_trimmed.len()..])?;
write_handle!(handle, "{}", &text[text_trimmed.len()..])?;
}
}
}
@@ -569,7 +608,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
}
if !self.config.style_components.plain() && line.bytes().next_back() != Some(b'\n') {
writeln!(handle)?;
writeln_handle!(handle,)?;
}
} else {
for &(style, region) in &regions {
@@ -579,7 +618,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
// ANSI escape passthrough.
(ansi, true) => {
self.ansi_style.update(ansi);
write!(handle, "{}", ansi)?;
write_handle!(handle, "{}", ansi)?;
}
// Regular text.
@@ -624,7 +663,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
}
// It wraps.
write!(
write_handle!(
handle,
"{}\n{}",
as_terminal_escaped(
@@ -650,7 +689,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
// flush the buffer
cursor += current_width;
write!(
write_handle!(
handle,
"{}",
as_terminal_escaped(
@@ -673,18 +712,18 @@ impl<'a> Printer for InteractivePrinter<'a> {
..Default::default()
};
write!(
write_handle!(
handle,
"{}",
ansi_style.paint(" ".repeat(cursor_max - cursor))
)?;
}
writeln!(handle)?;
writeln_handle!(handle,)?;
}
if highlight_this_line && self.config.theme == "ansi" {
self.ansi_style.update("^[24m");
write!(handle, "\x1B[24m")?;
write_handle!(handle, "\x1B[24m")?;
}
Ok(())