takumi_css/style/properties/grid/
grid_auto_flow.rs

1use cssparser::Parser;
2
3use crate::style::{CssToken, FromCss, MakeComputed, ParseResult, ToCss};
4
5/// Represents the direction of the grid auto flow.
6#[derive(Debug, Clone, Copy, PartialEq, Default)]
7#[non_exhaustive]
8pub enum GridDirection {
9  /// The grid auto flow is in the row direction.
10  #[default]
11  Row,
12  /// The grid auto flow is in the column direction.
13  Column,
14}
15
16/// Represents the flow of the grid auto placement.
17#[derive(Debug, Clone, Copy, PartialEq, Default)]
18#[non_exhaustive]
19pub struct GridAutoFlow {
20  /// The direction of the grid auto flow.
21  pub direction: GridDirection,
22  /// Whether the grid auto flow is dense.
23  pub dense: bool,
24}
25
26impl MakeComputed for GridAutoFlow {}
27
28impl From<GridAutoFlow> for taffy::GridAutoFlow {
29  fn from(value: GridAutoFlow) -> Self {
30    match (value.direction, value.dense) {
31      (GridDirection::Row, false) => taffy::GridAutoFlow::Row,
32      (GridDirection::Column, false) => taffy::GridAutoFlow::Column,
33      (GridDirection::Row, true) => taffy::GridAutoFlow::RowDense,
34      (GridDirection::Column, true) => taffy::GridAutoFlow::ColumnDense,
35    }
36  }
37}
38
39impl GridAutoFlow {
40  /// The grid auto flow is in the row direction.
41  pub const fn row() -> Self {
42    Self {
43      direction: GridDirection::Row,
44      dense: false,
45    }
46  }
47
48  /// The grid auto flow is in the column direction.
49  pub const fn column() -> Self {
50    Self {
51      direction: GridDirection::Column,
52      dense: false,
53    }
54  }
55
56  /// The grid auto flow is dense.
57  pub const fn dense(self) -> Self {
58    Self {
59      dense: true,
60      ..self
61    }
62  }
63}
64
65impl<'i> FromCss<'i> for GridAutoFlow {
66  fn from_css(input: &mut Parser<'i, '_>) -> ParseResult<'i, Self> {
67    let mut direction = GridDirection::default();
68    let mut dense = false;
69
70    loop {
71      if input.is_exhausted() {
72        break;
73      }
74
75      if input
76        .try_parse(|input| input.expect_ident_matching("dense"))
77        .is_ok()
78      {
79        dense = true;
80        continue;
81      }
82
83      if input
84        .try_parse(|input| input.expect_ident_matching("row"))
85        .is_ok()
86      {
87        direction = GridDirection::Row;
88        continue;
89      }
90
91      if input
92        .try_parse(|input| input.expect_ident_matching("column"))
93        .is_ok()
94      {
95        direction = GridDirection::Column;
96        continue;
97      }
98
99      return Err(input.new_error_for_next_token());
100    }
101
102    Ok(GridAutoFlow { direction, dense })
103  }
104
105  const VALID_TOKENS: &'static [CssToken] = &[
106    CssToken::Keyword("row"),
107    CssToken::Keyword("column"),
108    CssToken::Keyword("dense"),
109  ];
110}
111
112impl ToCss for GridAutoFlow {
113  fn to_css<W: std::fmt::Write>(&self, dest: &mut W) -> std::fmt::Result {
114    match self.direction {
115      GridDirection::Row => dest.write_str("row")?,
116      GridDirection::Column => dest.write_str("column")?,
117    }
118    if self.dense {
119      dest.write_str(" dense")?;
120    }
121    Ok(())
122  }
123}
takumi_css/style/properties/grid/grid_auto_flow.rs

takumi_css/style/properties/grid/
grid_auto_flow.rs
