azul_css/props/
formatter.rs

1//! Trait and implementations for formatting CSS properties back into strings.
2//!
3//! This module defines `FormatAsCssValue` (zero-alloc, `fmt::Formatter`-based)
4//! and re-exports `PrintAsCssValue` (from `css.rs`, returns `String`).
5//! `PrintAsCssValue` impls for border, padding, margin, and gap types live here.
6
7use alloc::string::String;
8use core::fmt;
9
10// Re-export the PrintAsCssValue trait from the css module
11pub use crate::css::PrintAsCssValue;
12use crate::props::{
13    layout::{dimensions::*, spacing::*},
14    style::{
15        border::*,
16        border_radius::*,
17    },
18};
19
20/// Zero-allocation CSS value formatting trait using `fmt::Formatter`.
21///
22/// Unlike `PrintAsCssValue` (which returns a `String`), this trait writes
23/// directly into a formatter and is suitable for `Display` impl delegation.
24pub trait FormatAsCssValue {
25    fn format_as_css_value(&self, f: &mut fmt::Formatter) -> fmt::Result;
26}
27
28macro_rules! impl_print_as_css_display {
29    ($($t:ty),+ $(,)?) => {
30        $(impl PrintAsCssValue for $t {
31            fn print_as_css_value(&self) -> String {
32                format!("{}", self.inner)
33            }
34        })+
35    };
36}
37
38macro_rules! impl_print_as_css_hash {
39    ($($t:ty),+ $(,)?) => {
40        $(impl PrintAsCssValue for $t {
41            fn print_as_css_value(&self) -> String {
42                self.inner.to_hash()
43            }
44        })+
45    };
46}
47
48// --- Style Properties ---
49
50impl_print_as_css_display!(
51    StyleBorderTopLeftRadius,
52    StyleBorderTopRightRadius,
53    StyleBorderBottomLeftRadius,
54    StyleBorderBottomRightRadius,
55    StyleBorderTopStyle,
56    StyleBorderRightStyle,
57    StyleBorderBottomStyle,
58    StyleBorderLeftStyle,
59    LayoutBorderTopWidth,
60    LayoutBorderRightWidth,
61    LayoutBorderBottomWidth,
62    LayoutBorderLeftWidth,
63);
64
65impl_print_as_css_hash!(
66    StyleBorderTopColor,
67    StyleBorderRightColor,
68    StyleBorderBottomColor,
69    StyleBorderLeftColor,
70);
71
72// --- Layout Spacing Properties ---
73
74impl_print_as_css_display!(
75    LayoutPaddingTop,
76    LayoutPaddingLeft,
77    LayoutPaddingRight,
78    LayoutPaddingBottom,
79    LayoutPaddingInlineStart,
80    LayoutPaddingInlineEnd,
81    LayoutMarginTop,
82    LayoutMarginLeft,
83    LayoutMarginRight,
84    LayoutMarginBottom,
85    LayoutColumnGap,
86    LayoutRowGap,
87);
azul_css/props/formatter.rs

azul_css/props/
formatter.rs
