message: Add additional helpers to `css` module in `iced_web`
diff: //! Style your widgets.
  -use crate::{bumpalo, Align, Color, Length};
  +use crate::{bumpalo, Align, Background, Color, Length};
  use std::collections::BTreeMap;
  @@ -119,7 +119,7 @@ impl<'a> Css<'a> {
  declarations.push(text(
  "body { height: 100%; margin: 0; padding: 0; font-family: sans-serif }",
  ));
  - declarations.push(text("p { margin: 0 }"));
  + declarations.push(text("* { margin: 0; padding: 0 }"));
  declarations.push(text(
  "button { border: none; cursor: pointer; outline: none }",
  ));
  @@ -143,6 +143,26 @@ pub fn length(length: Length) -> String {
  }
  }
  +/// Returns the style value for the given maximum length in units.
  +pub fn max_length(units: u32) -> String {
  + use std::u32;
  +
  + if units == u32::MAX {
  + String::from("initial")
  + } else {
  + format!("{}px", units)
  + }
  +}
  +
  +/// Returns the style value for the given minimum length in units.
  +pub fn min_length(units: u32) -> String {
  + if units == 0 {
  + String::from("initial")
  + } else {
  + format!("{}px", units)
  + }
  +}
  +
  /// Returns the style value for the given [`Color`].
  ///
  /// [`Color`]: ../struct.Color.html
  @@ -150,6 +170,15 @@ pub fn color(Color { r, g, b, a }: Color) -> String {
  format!("rgba({}, {}, {}, {})", 255.0 * r, 255.0 * g, 255.0 * b, a)
  }
  +/// Returns the style value for the given [`Background`].
  +///
  +/// [`Background`]: ../struct.Background.html
  +pub fn background(background: Background) -> String {
  + match background {
  + Background::Color(c) => color(c),
  + }
  +}
  +
  /// Returns the style value for the given [`Align`].
  ///
  /// [`Align`]: ../enum.Align.html
  