mirror of https://github.com/sharkdp/bat.git
Remove code that tries to handle ANSI escape inputs
Syntax highlighting is broken when input contains ANSI escape characters anyway, so there is not much point in trying to handle ANSI escapes in input.
This commit is contained in:
Martin Nordholts
parent
a6297b282c
commit
8174e02279
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@ -14,6 +14,7 @@
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- Relaxed glibc requirements on amd64, see #2106 and #2194 (@sharkdp)
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- Improved fish completions. See #2275 (@zgracem)
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- Stop pre-processing ANSI escape characters. Syntax highlighting on ANSI escaped input is not supported. See #2185 and #2189 (@Enselic)
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## Syntaxes
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@ -46,7 +46,6 @@ pub(crate) mod printer;
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pub mod style;
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pub(crate) mod syntax_mapping;
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mod terminal;
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mod vscreen;
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pub(crate) mod wrapping;
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pub use pretty_printer::{Input, PrettyPrinter};
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@ -1,35 +1,26 @@
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use console::AnsiCodeIterator;
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/// Expand tabs like an ANSI-enabled expand(1).
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pub fn expand_tabs(line: &str, width: usize, cursor: &mut usize) -> String {
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let mut buffer = String::with_capacity(line.len() * 2);
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pub fn expand_tabs(mut text: &str, width: usize, cursor: &mut usize) -> String {
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let mut buffer = String::with_capacity(text.len() * 2);
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for chunk in AnsiCodeIterator::new(line) {
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match chunk {
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(text, true) => buffer.push_str(text),
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(mut text, false) => {
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while let Some(index) = text.find('\t') {
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// Add previous text.
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if index > 0 {
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*cursor += index;
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buffer.push_str(&text[0..index]);
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}
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// Add tab.
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let spaces = width - (*cursor % width);
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*cursor += spaces;
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buffer.push_str(&*" ".repeat(spaces));
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// Next.
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text = &text[index + 1..text.len()];
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}
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*cursor += text.len();
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buffer.push_str(text);
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}
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while let Some(index) = text.find('\t') {
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// Add previous text.
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if index > 0 {
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*cursor += index;
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buffer.push_str(&text[0..index]);
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}
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// Add tab.
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let spaces = width - (*cursor % width);
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*cursor += spaces;
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buffer.push_str(&*" ".repeat(spaces));
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// Next.
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text = &text[index + 1..text.len()];
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}
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*cursor += text.len();
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buffer.push_str(text);
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buffer
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}
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226
src/printer.rs
226
src/printer.rs
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@ -6,8 +6,6 @@ use ansi_term::Style;
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use bytesize::ByteSize;
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use console::AnsiCodeIterator;
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use syntect::easy::HighlightLines;
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use syntect::highlighting::Color;
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use syntect::highlighting::Theme;
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@ -33,7 +31,6 @@ use crate::line_range::RangeCheckResult;
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use crate::preprocessor::{expand_tabs, replace_nonprintable};
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use crate::style::StyleComponent;
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use crate::terminal::{as_terminal_escaped, to_ansi_color};
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use crate::vscreen::AnsiStyle;
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use crate::wrapping::WrappingMode;
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pub(crate) trait Printer {
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@ -122,7 +119,6 @@ pub(crate) struct InteractivePrinter<'a> {
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config: &'a Config<'a>,
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decorations: Vec<Box<dyn Decoration>>,
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panel_width: usize,
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ansi_style: AnsiStyle,
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content_type: Option<ContentType>,
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#[cfg(feature = "git")]
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pub line_changes: &'a Option<LineChanges>,
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@ -206,7 +202,6 @@ impl<'a> InteractivePrinter<'a> {
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config,
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decorations,
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content_type: input.reader.content_type,
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ansi_style: AnsiStyle::new(),
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#[cfg(feature = "git")]
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line_changes,
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highlighter_from_set,
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@ -476,7 +471,7 @@ impl<'a> Printer for InteractivePrinter<'a> {
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self.config.highlighted_lines.0.check(line_number) == RangeCheckResult::InRange;
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if highlight_this_line && self.config.theme == "ansi" {
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self.ansi_style.update("^[4m");
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write!(handle, "\x1B[4m")?;
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}
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let background_color = self
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@ -503,51 +498,37 @@ impl<'a> Printer for InteractivePrinter<'a> {
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let italics = self.config.use_italic_text;
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for &(style, region) in ®ions {
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let ansi_iterator = AnsiCodeIterator::new(region);
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for chunk in ansi_iterator {
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match chunk {
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// ANSI escape passthrough.
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(ansi, true) => {
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self.ansi_style.update(ansi);
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write!(handle, "{}", ansi)?;
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}
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let text = &*self.preprocess(region, &mut cursor_total);
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let text_trimmed = text.trim_end_matches(|c| c == '\r' || c == '\n');
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// Regular text.
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(text, false) => {
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let text = &*self.preprocess(text, &mut cursor_total);
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let text_trimmed = text.trim_end_matches(|c| c == '\r' || c == '\n');
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write!(
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handle,
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"{}",
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as_terminal_escaped(
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style,
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text_trimmed,
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true_color,
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colored_output,
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italics,
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background_color
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)
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)?;
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write!(
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handle,
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"{}",
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as_terminal_escaped(
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style,
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&format!("{}{}", self.ansi_style, text_trimmed),
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true_color,
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colored_output,
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italics,
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background_color
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)
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)?;
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if text.len() != text_trimmed.len() {
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if let Some(background_color) = background_color {
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let ansi_style = Style {
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background: to_ansi_color(background_color, true_color),
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..Default::default()
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};
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if text.len() != text_trimmed.len() {
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if let Some(background_color) = background_color {
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let ansi_style = Style {
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background: to_ansi_color(background_color, true_color),
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..Default::default()
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};
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let width = if cursor_total <= cursor_max {
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cursor_max - cursor_total + 1
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} else {
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0
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};
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write!(handle, "{}", ansi_style.paint(" ".repeat(width)))?;
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}
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write!(handle, "{}", &text[text_trimmed.len()..])?;
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}
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}
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let width = if cursor_total <= cursor_max {
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cursor_max - cursor_total + 1
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} else {
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0
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};
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write!(handle, "{}", ansi_style.paint(" ".repeat(width)))?;
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}
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write!(handle, "{}", &text[text_trimmed.len()..])?;
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}
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}
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@ -556,98 +537,82 @@ impl<'a> Printer for InteractivePrinter<'a> {
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}
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} else {
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for &(style, region) in ®ions {
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let ansi_iterator = AnsiCodeIterator::new(region);
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for chunk in ansi_iterator {
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match chunk {
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// ANSI escape passthrough.
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(ansi, true) => {
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self.ansi_style.update(ansi);
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write!(handle, "{}", ansi)?;
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}
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let text = self.preprocess(
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region.trim_end_matches(|c| c == '\r' || c == '\n'),
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&mut cursor_total,
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);
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// Regular text.
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(text, false) => {
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let text = self.preprocess(
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text.trim_end_matches(|c| c == '\r' || c == '\n'),
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&mut cursor_total,
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);
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let mut max_width = cursor_max - cursor;
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let mut max_width = cursor_max - cursor;
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// line buffer (avoid calling write! for every character)
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let mut line_buf = String::with_capacity(max_width * 4);
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// line buffer (avoid calling write! for every character)
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let mut line_buf = String::with_capacity(max_width * 4);
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// Displayed width of line_buf
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let mut current_width = 0;
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// Displayed width of line_buf
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let mut current_width = 0;
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for c in text.chars() {
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// calculate the displayed width for next character
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let cw = c.width().unwrap_or(0);
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current_width += cw;
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for c in text.chars() {
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// calculate the displayed width for next character
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let cw = c.width().unwrap_or(0);
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current_width += cw;
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// if next character cannot be printed on this line,
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// flush the buffer.
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if current_width > max_width {
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// Generate wrap padding if not already generated.
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if panel_wrap.is_none() {
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panel_wrap = if self.panel_width > 0 {
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Some(format!(
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"{} ",
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self.decorations
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.iter()
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.map(|d| d
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.generate(line_number, true, self)
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.text)
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.collect::<Vec<String>>()
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.join(" ")
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))
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} else {
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Some("".to_string())
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}
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}
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// It wraps.
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write!(
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handle,
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"{}\n{}",
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as_terminal_escaped(
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style,
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&*format!("{}{}", self.ansi_style, line_buf),
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self.config.true_color,
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self.config.colored_output,
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self.config.use_italic_text,
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background_color
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),
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panel_wrap.clone().unwrap()
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)?;
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cursor = 0;
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max_width = cursor_max;
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line_buf.clear();
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current_width = cw;
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}
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line_buf.push(c);
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// if next character cannot be printed on this line,
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// flush the buffer.
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if current_width > max_width {
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// Generate wrap padding if not already generated.
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if panel_wrap.is_none() {
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panel_wrap = if self.panel_width > 0 {
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Some(format!(
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"{} ",
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self.decorations
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.iter()
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.map(|d| d.generate(line_number, true, self).text)
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.collect::<Vec<String>>()
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.join(" ")
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))
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} else {
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Some("".to_string())
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}
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// flush the buffer
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cursor += current_width;
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write!(
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handle,
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"{}",
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as_terminal_escaped(
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style,
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&*format!("{}{}", self.ansi_style, line_buf),
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self.config.true_color,
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self.config.colored_output,
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self.config.use_italic_text,
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background_color
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)
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)?;
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}
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// It wraps.
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write!(
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handle,
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"{}\n{}",
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as_terminal_escaped(
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style,
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&line_buf,
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self.config.true_color,
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self.config.colored_output,
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self.config.use_italic_text,
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background_color
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),
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panel_wrap.clone().unwrap()
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)?;
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cursor = 0;
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max_width = cursor_max;
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line_buf.clear();
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current_width = cw;
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}
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line_buf.push(c);
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}
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// flush the buffer
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cursor += current_width;
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write!(
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handle,
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"{}",
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as_terminal_escaped(
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style,
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&line_buf,
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self.config.true_color,
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self.config.colored_output,
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self.config.use_italic_text,
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background_color
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)
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)?;
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}
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if let Some(background_color) = background_color {
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@ -666,7 +631,6 @@ impl<'a> Printer for InteractivePrinter<'a> {
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}
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if highlight_this_line && self.config.theme == "ansi" {
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self.ansi_style.update("^[24m");
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write!(handle, "\x1B[24m")?;
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}
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212
src/vscreen.rs
212
src/vscreen.rs
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@ -1,212 +0,0 @@
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use std::fmt::{Display, Formatter};
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// Wrapper to avoid unnecessary branching when input doesn't have ANSI escape sequences.
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pub struct AnsiStyle {
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attributes: Option<Attributes>,
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}
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impl AnsiStyle {
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pub fn new() -> Self {
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AnsiStyle { attributes: None }
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}
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pub fn update(&mut self, sequence: &str) -> bool {
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match &mut self.attributes {
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Some(a) => a.update(sequence),
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None => {
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self.attributes = Some(Attributes::new());
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self.attributes.as_mut().unwrap().update(sequence)
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}
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}
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}
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}
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impl Display for AnsiStyle {
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fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
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match self.attributes {
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Some(ref a) => a.fmt(f),
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None => Ok(()),
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}
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}
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}
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struct Attributes {
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foreground: String,
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background: String,
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underlined: String,
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/// The character set to use.
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/// REGEX: `\^[()][AB0-3]`
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charset: String,
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/// A buffer for unknown sequences.
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unknown_buffer: String,
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/// ON: ^[1m
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/// OFF: ^[22m
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bold: String,
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/// ON: ^[2m
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/// OFF: ^[22m
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dim: String,
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/// ON: ^[4m
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/// OFF: ^[24m
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underline: String,
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/// ON: ^[3m
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/// OFF: ^[23m
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italic: String,
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/// ON: ^[9m
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/// OFF: ^[29m
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strike: String,
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}
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impl Attributes {
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pub fn new() -> Self {
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Attributes {
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foreground: "".to_owned(),
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background: "".to_owned(),
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underlined: "".to_owned(),
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charset: "".to_owned(),
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unknown_buffer: "".to_owned(),
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bold: "".to_owned(),
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dim: "".to_owned(),
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underline: "".to_owned(),
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italic: "".to_owned(),
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strike: "".to_owned(),
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}
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}
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/// Update the attributes with an escape sequence.
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/// Returns `false` if the sequence is unsupported.
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pub fn update(&mut self, sequence: &str) -> bool {
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let mut chars = sequence.char_indices().skip(1);
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if let Some((_, t)) = chars.next() {
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match t {
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'(' => self.update_with_charset('(', chars.map(|(_, c)| c)),
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')' => self.update_with_charset(')', chars.map(|(_, c)| c)),
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'[' => {
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if let Some((i, last)) = chars.last() {
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// SAFETY: Always starts with ^[ and ends with m.
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self.update_with_csi(last, &sequence[2..i])
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} else {
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false
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}
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}
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_ => self.update_with_unsupported(sequence),
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}
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} else {
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false
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}
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}
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|
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fn sgr_reset(&mut self) {
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self.foreground.clear();
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self.background.clear();
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self.underlined.clear();
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self.bold.clear();
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self.dim.clear();
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self.underline.clear();
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self.italic.clear();
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self.strike.clear();
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}
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fn update_with_sgr(&mut self, parameters: &str) -> bool {
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let mut iter = parameters
|
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.split(';')
|
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.map(|p| if p.is_empty() { "0" } else { p })
|
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.map(|p| p.parse::<u16>())
|
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.map(|p| p.unwrap_or(0)); // Treat errors as 0.
|
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|
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while let Some(p) = iter.next() {
|
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match p {
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0 => self.sgr_reset(),
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1 => self.bold = format!("\x1B[{}m", parameters),
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2 => self.dim = format!("\x1B[{}m", parameters),
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3 => self.italic = format!("\x1B[{}m", parameters),
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4 => self.underline = format!("\x1B[{}m", parameters),
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23 => self.italic.clear(),
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24 => self.underline.clear(),
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22 => {
|
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self.bold.clear();
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self.dim.clear();
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}
|
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30..=39 => self.foreground = Self::parse_color(p, &mut iter),
|
||||
40..=49 => self.background = Self::parse_color(p, &mut iter),
|
||||
58..=59 => self.underlined = Self::parse_color(p, &mut iter),
|
||||
90..=97 => self.foreground = Self::parse_color(p, &mut iter),
|
||||
100..=107 => self.foreground = Self::parse_color(p, &mut iter),
|
||||
_ => {
|
||||
// Unsupported SGR sequence.
|
||||
// Be compatible and pretend one just wasn't was provided.
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
true
|
||||
}
|
||||
|
||||
fn update_with_csi(&mut self, finalizer: char, sequence: &str) -> bool {
|
||||
if finalizer == 'm' {
|
||||
self.update_with_sgr(sequence)
|
||||
} else {
|
||||
false
|
||||
}
|
||||
}
|
||||
|
||||
fn update_with_unsupported(&mut self, sequence: &str) -> bool {
|
||||
self.unknown_buffer.push_str(sequence);
|
||||
false
|
||||
}
|
||||
|
||||
fn update_with_charset(&mut self, kind: char, set: impl Iterator<Item = char>) -> bool {
|
||||
self.charset = format!("\x1B{}{}", kind, set.take(1).collect::<String>());
|
||||
true
|
||||
}
|
||||
|
||||
fn parse_color(color: u16, parameters: &mut dyn Iterator<Item = u16>) -> String {
|
||||
match color % 10 {
|
||||
8 => match parameters.next() {
|
||||
Some(5) /* 256-color */ => format!("\x1B[{};5;{}m", color, join(";", 1, parameters)),
|
||||
Some(2) /* 24-bit color */ => format!("\x1B[{};2;{}m", color, join(";", 3, parameters)),
|
||||
Some(c) => format!("\x1B[{};{}m", color, c),
|
||||
_ => "".to_owned(),
|
||||
},
|
||||
9 => "".to_owned(),
|
||||
_ => format!("\x1B[{}m", color),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Display for Attributes {
|
||||
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
|
||||
write!(
|
||||
f,
|
||||
"{}{}{}{}{}{}{}{}{}",
|
||||
self.foreground,
|
||||
self.background,
|
||||
self.underlined,
|
||||
self.charset,
|
||||
self.bold,
|
||||
self.dim,
|
||||
self.underline,
|
||||
self.italic,
|
||||
self.strike,
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
fn join(
|
||||
delimiter: &str,
|
||||
limit: usize,
|
||||
iterator: &mut dyn Iterator<Item = impl ToString>,
|
||||
) -> String {
|
||||
iterator
|
||||
.take(limit)
|
||||
.map(|i| i.to_string())
|
||||
.collect::<Vec<String>>()
|
||||
.join(delimiter)
|
||||
}
|
||||
|
|
@ -1419,25 +1419,6 @@ fn ansi_highlight_underline() {
|
|||
.stderr("");
|
||||
}
|
||||
|
||||
// Ensure that ANSI passthrough is emitted properly for both wrapping and non-wrapping printer.
|
||||
#[test]
|
||||
fn ansi_passthrough_emit() {
|
||||
for wrapping in &["never", "character"] {
|
||||
bat()
|
||||
.arg("--paging=never")
|
||||
.arg("--color=never")
|
||||
.arg("--terminal-width=80")
|
||||
.arg(format!("--wrap={}", wrapping))
|
||||
.arg("--decorations=always")
|
||||
.arg("--style=plain")
|
||||
.write_stdin("\x1B[33mColor\nColor \x1B[m\nPlain\n")
|
||||
.assert()
|
||||
.success()
|
||||
.stdout("\x1B[33m\x1B[33mColor\n\x1B[33mColor \x1B[m\nPlain\n")
|
||||
.stderr("");
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn ignored_suffix_arg() {
|
||||
bat()
|
||||
|
|
|
|||
Loading…
Reference in New Issue