takumi 1.7.0

Render UI component trees to images.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72

use std::fmt;

use crate::layout::style::{ToCss, unexpected_token};
use cssparser::{Parser, Token, match_ignore_ascii_case};
use parley::style::FontStyle as ParleyFontStyle;

use crate::layout::style::{Angle, CssToken, FromCss, MakeComputed, ParseResult};

/// Controls the slant (italic/oblique) of text rendering.
#[derive(Default, Debug, Clone, Copy, PartialEq)]
pub struct FontStyle(ParleyFontStyle);

impl MakeComputed for FontStyle {}

impl<'i> FromCss<'i> for FontStyle {
  fn from_css(input: &mut Parser<'i, '_>) -> ParseResult<'i, Self> {
    let location = input.current_source_location();
    let ident = input.expect_ident()?;

    match_ignore_ascii_case! { ident,
      "normal" => Ok(Self(ParleyFontStyle::Normal)),
      "italic" => Ok(Self(ParleyFontStyle::Italic)),
      "oblique" => {
        let angle = input.try_parse(Angle::from_css).ok().map(|angle| *angle);
        Ok(Self(ParleyFontStyle::Oblique(angle)))
      },
      _ => Err(unexpected_token!(location, &Token::Ident(ident.to_owned()))),
    }
  }

  const VALID_TOKENS: &'static [CssToken] = &[
    CssToken::Keyword("normal"),
    CssToken::Keyword("italic"),
    CssToken::Keyword("oblique"),
  ];
}

impl FontStyle {
  /// The normal font style.
  pub const fn normal() -> Self {
    Self(ParleyFontStyle::Normal)
  }

  /// The italic font style.
  pub const fn italic() -> Self {
    Self(ParleyFontStyle::Italic)
  }

  /// The oblique font style with a given angle.
  pub const fn oblique(angle: f32) -> Self {
    Self(ParleyFontStyle::Oblique(Some(angle)))
  }
}

impl From<FontStyle> for ParleyFontStyle {
  fn from(value: FontStyle) -> Self {
    value.0
  }
}

impl ToCss for FontStyle {
  fn to_css<W: fmt::Write>(&self, dest: &mut W) -> fmt::Result {
    match &self.0 {
      ParleyFontStyle::Normal => dest.write_str("normal"),
      ParleyFontStyle::Italic => dest.write_str("italic"),
      ParleyFontStyle::Oblique(angle) => match angle {
        Some(a) => write!(dest, "oblique {}deg", a),
        None => dest.write_str("oblique"),
      },
    }
  }
}