15862044996

Committed 24 Jun 2025 09:37PM UTC coverage: 86.621%. Remained the same

Build # 15862044996

Build Type

Pull #222

github

Committed by

web-flow

Commit Message

Merge a0d26c6aa into a81dc31d2

Pull Request Pull Request #222: test: Ensure all examples have a test

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100.0

/src/renderer/styled_buffer.rs

//! Adapted from [styled_buffer]
//!
//! [styled_buffer]: https://github.com/rust-lang/rust/blob/894f7a4ba6554d3797404bbf550d9919df060b97/compiler/rustc_errors/src/styled_buffer.rs

use crate::renderer::stylesheet::Stylesheet;
use crate::renderer::ElementStyle;
use crate::Level;

use std::fmt;
use std::fmt::Write;

#[derive(Debug)]
pub(crate) struct StyledBuffer {
    lines: Vec<Vec<StyledChar>>,
}

#[derive(Clone, Copy, Debug, PartialEq)]
pub(crate) struct StyledChar {
    ch: char,
    style: ElementStyle,
}

impl StyledChar {
    pub(crate) const SPACE: Self = StyledChar::new(' ', ElementStyle::NoStyle);

    pub(crate) const fn new(ch: char, style: ElementStyle) -> StyledChar {
        StyledChar { ch, style }
    }
}

impl StyledBuffer {
    pub(crate) fn new() -> StyledBuffer {
        StyledBuffer { lines: vec![] }
    }

    fn ensure_lines(&mut self, line: usize) {
        if line >= self.lines.len() {
            self.lines.resize(line + 1, Vec::new());
        }
    }

    pub(crate) fn render(
        &self,
        level: Level<'_>,
        stylesheet: &Stylesheet,
        str: &mut String,
    ) -> Result<(), fmt::Error> {
        for (i, line) in self.lines.iter().enumerate() {
            let mut current_style = stylesheet.none;
            for StyledChar { ch, style } in line {
                let ch_style = style.color_spec(&level, stylesheet);
                if ch_style != current_style {
                    if !line.is_empty() {
                        write!(str, "{}", current_style.render_reset())?;
                    }
                    current_style = ch_style;
                    write!(str, "{}", current_style.render())?;
                }
                write!(str, "{ch}")?;
            }
            write!(str, "{}", current_style.render_reset())?;
            if i != self.lines.len() - 1 {
                writeln!(str)?;
            }
        }
        Ok(())
    }

    /// Sets `chr` with `style` for given `line`, `col`.
    /// If `line` does not exist in our buffer, adds empty lines up to the given
    /// and fills the last line with unstyled whitespace.
    pub(crate) fn putc(&mut self, line: usize, col: usize, chr: char, style: ElementStyle) {
        self.ensure_lines(line);
        if col >= self.lines[line].len() {
            self.lines[line].resize(col + 1, StyledChar::SPACE);
        }
        self.lines[line][col] = StyledChar::new(chr, style);
    }

    /// Sets `string` with `style` for given `line`, starting from `col`.
    /// If `line` does not exist in our buffer, adds empty lines up to the given
    /// and fills the last line with unstyled whitespace.
    pub(crate) fn puts(&mut self, line: usize, col: usize, string: &str, style: ElementStyle) {
        let mut n = col;
        for c in string.chars() {
            self.putc(line, n, c, style);
            n += 1;
        }
    }

    /// For given `line` inserts `string` with `style` after old content of that line,
    /// adding lines if needed
    pub(crate) fn append(&mut self, line: usize, string: &str, style: ElementStyle) {
        if line >= self.lines.len() {
            self.puts(line, 0, string, style);
        } else {
            let col = self.lines[line].len();
            self.puts(line, col, string, style);
        }
    }

    pub(crate) fn replace(&mut self, line: usize, start: usize, end: usize, string: &str) {
        if start == end {
            return;
        }
        let _ = self.lines[line].drain(start..(end - string.chars().count()));
        for (i, c) in string.chars().enumerate() {
            self.lines[line][start + i] = StyledChar::new(c, ElementStyle::LineNumber);
        }
    }

    /// For given `line` inserts `string` with `style` before old content of that line,
    /// adding lines if needed
    pub(crate) fn prepend(&mut self, line: usize, string: &str, style: ElementStyle) {
        self.ensure_lines(line);
        let string_len = string.chars().count();

        if !self.lines[line].is_empty() {
            // Push the old content over to make room for new content
            for _ in 0..string_len {
                self.lines[line].insert(0, StyledChar::SPACE);
            }
        }

        self.puts(line, 0, string, style);
    }

    pub(crate) fn num_lines(&self) -> usize {
        self.lines.len()
    }

    /// Set `style` for `line`, `col_start..col_end` range if:
    /// 1. That line and column range exist in `StyledBuffer`
    /// 2. `overwrite` is `true` or existing style is `Style::NoStyle` or `Style::Quotation`
    pub(crate) fn set_style_range(
        &mut self,
        line: usize,
        col_start: usize,
        col_end: usize,
        style: ElementStyle,
        overwrite: bool,
    ) {
        for col in col_start..col_end {
            self.set_style(line, col, style, overwrite);
        }
    }

    /// Set `style` for `line`, `col` if:
    /// 1. That line and column exist in `StyledBuffer`
    /// 2. `overwrite` is `true` or existing style is `Style::NoStyle` or `Style::Quotation`
    pub(crate) fn set_style(
        &mut self,
        line: usize,
        col: usize,
        style: ElementStyle,
        overwrite: bool,
    ) {
        if let Some(ref mut line) = self.lines.get_mut(line) {
            if let Some(StyledChar { style: s, .. }) = line.get_mut(col) {
                if overwrite || matches!(s, ElementStyle::NoStyle | ElementStyle::Quotation) {
                    *s = style;
                }
            }
        }
    }
}

1	//! Adapted from [styled_buffer]
2	//!
3	//! [styled_buffer]: https://github.com/rust-lang/rust/blob/894f7a4ba6554d3797404bbf550d9919df060b97/compiler/rustc_errors/src/styled_buffer.rs
4
5	use crate::renderer::stylesheet::Stylesheet;
6	use crate::renderer::ElementStyle;
7	use crate::Level;
8
9	use std::fmt;
10	use std::fmt::Write;
11
12	#[derive(Debug)]
13	pub(crate) struct StyledBuffer {
14	lines: Vec<Vec<StyledChar>>,
15	}
16
17	#[derive(Clone, Copy, Debug, PartialEq)]
18	pub(crate) struct StyledChar {
19	ch: char,
20	style: ElementStyle,
21	}
22
23	impl StyledChar {
24	pub(crate) const SPACE: Self = StyledChar::new(' ', ElementStyle::NoStyle);
25
26	pub(crate) const fn new(ch: char, style: ElementStyle) -> StyledChar {	4✔
27	StyledChar { ch, style }
28	}
29	}
30
31	impl StyledBuffer {
32	pub(crate) fn new() -> StyledBuffer {	8✔
33	StyledBuffer { lines: vec![] }	5✔
34	}
35
36	fn ensure_lines(&mut self, line: usize) {	4✔
37	if line >= self.lines.len() {	6✔
38	self.lines.resize(line + 1, Vec::new());	4✔
39	}
40	}
41
42	pub(crate) fn render(	5✔
43	&self,
44	level: Level<'_>,
45	stylesheet: &Stylesheet,
46	str: &mut String,
47	) -> Result<(), fmt::Error> {
48	for (i, line) in self.lines.iter().enumerate() {	5✔
49	let mut current_style = stylesheet.none;	5✔
50	for StyledChar { ch, style } in line {	10✔
51	let ch_style = style.color_spec(&level, stylesheet);	5✔
52	if ch_style != current_style {	4✔
53	if !line.is_empty() {	2✔
54	write!(str, "{}", current_style.render_reset())?;	2✔
55	}
56	current_style = ch_style;	2✔
57	write!(str, "{}", current_style.render())?;	2✔
58	}
59	write!(str, "{ch}")?;	6✔
60	}
61	write!(str, "{}", current_style.render_reset())?;	8✔
62	if i != self.lines.len() - 1 {	3✔
63	writeln!(str)?;	7✔
64	}
65	}
66	Ok(())	4✔
67	}
68
69	/// Sets `chr` with `style` for given `line`, `col`.
70	/// If `line` does not exist in our buffer, adds empty lines up to the given
71	/// and fills the last line with unstyled whitespace.
72	pub(crate) fn putc(&mut self, line: usize, col: usize, chr: char, style: ElementStyle) {	4✔
73	self.ensure_lines(line);	5✔
74	if col >= self.lines[line].len() {	6✔
75	self.lines[line].resize(col + 1, StyledChar::SPACE);	4✔
76	}
77	self.lines[line][col] = StyledChar::new(chr, style);	6✔
78	}
79
80	/// Sets `string` with `style` for given `line`, starting from `col`.
81	/// If `line` does not exist in our buffer, adds empty lines up to the given
82	/// and fills the last line with unstyled whitespace.
83	pub(crate) fn puts(&mut self, line: usize, col: usize, string: &str, style: ElementStyle) {	4✔
84	let mut n = col;	6✔
85	for c in string.chars() {	10✔
86	self.putc(line, n, c, style);	6✔
87	n += 1;	10✔
88	}
89	}
90
91	/// For given `line` inserts `string` with `style` after old content of that line,
92	/// adding lines if needed
93	pub(crate) fn append(&mut self, line: usize, string: &str, style: ElementStyle) {	6✔
94	if line >= self.lines.len() {	4✔
95	self.puts(line, 0, string, style);	6✔
96	} else {
97	let col = self.lines[line].len();	6✔
98	self.puts(line, col, string, style);	4✔
99	}
100	}
101
102	pub(crate) fn replace(&mut self, line: usize, start: usize, end: usize, string: &str) {	1✔
103	if start == end {	1✔
104	return;
105	}
106	let _ = self.lines[line].drain(start..(end - string.chars().count()));	3✔
107	for (i, c) in string.chars().enumerate() {	4✔
108	self.lines[line][start + i] = StyledChar::new(c, ElementStyle::LineNumber);	1✔
109	}
110	}
111
112	/// For given `line` inserts `string` with `style` before old content of that line,
113	/// adding lines if needed
114	pub(crate) fn prepend(&mut self, line: usize, string: &str, style: ElementStyle) {	4✔
115	self.ensure_lines(line);	9✔
116	let string_len = string.chars().count();	7✔
117
118	if !self.lines[line].is_empty() {	7✔
119	// Push the old content over to make room for new content
120	for _ in 0..string_len {	12✔
121	self.lines[line].insert(0, StyledChar::SPACE);	7✔
122	}
123	}
124
125	self.puts(line, 0, string, style);	5✔
126	}
127
128	pub(crate) fn num_lines(&self) -> usize {	4✔
129	self.lines.len()	4✔
130	}
131
132	/// Set `style` for `line`, `col_start..col_end` range if:
133	/// 1. That line and column range exist in `StyledBuffer`
134	/// 2. `overwrite` is `true` or existing style is `Style::NoStyle` or `Style::Quotation`
135	pub(crate) fn set_style_range(	3✔
136	&mut self,
137	line: usize,
138	col_start: usize,
139	col_end: usize,
140	style: ElementStyle,
141	overwrite: bool,
142	) {
143	for col in col_start..col_end {	6✔
144	self.set_style(line, col, style, overwrite);	3✔
145	}
146	}
147
148	/// Set `style` for `line`, `col` if:
149	/// 1. That line and column exist in `StyledBuffer`
150	/// 2. `overwrite` is `true` or existing style is `Style::NoStyle` or `Style::Quotation`
151	pub(crate) fn set_style(	3✔
152	&mut self,
153	line: usize,
154	col: usize,
155	style: ElementStyle,
156	overwrite: bool,
157	) {
158	if let Some(ref mut line) = self.lines.get_mut(line) {	2✔
159	if let Some(StyledChar { style: s, .. }) = line.get_mut(col) {	6✔
160	if overwrite \|\| matches!(s, ElementStyle::NoStyle \| ElementStyle::Quotation) {	6✔
161	*s = style;	2✔
162	}
163	}
164	}
165	}
166	}

rust-lang / annotate-snippets-rs / 15862044996

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