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shape.rs
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//! CSS shape values for masking and clipping.
use super::length::LengthPercentage;
use super::position::Position;
use super::rect::Rect;
use crate::error::{ParserError, PrinterError};
use crate::macros::enum_property;
use crate::printer::Printer;
use crate::properties::border_radius::BorderRadius;
use crate::traits::{Parse, ToCss};
#[cfg(feature = "visitor")]
use crate::visitor::Visit;
use cssparser::*;
/// A CSS [`<basic-shape>`](https://www.w3.org/TR/css-shapes-1/#basic-shape-functions) value.
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "visitor", derive(Visit))]
#[cfg_attr(
feature = "serde",
derive(serde::Serialize, serde::Deserialize),
serde(tag = "type", content = "value", rename_all = "kebab-case")
)]
#[cfg_attr(feature = "jsonschema", derive(schemars::JsonSchema))]
#[cfg
8000
_attr(feature = "into_owned", derive(static_self::IntoOwned))]
pub enum BasicShape {
/// An inset rectangle.
Inset(InsetRect),
/// A circle.
Circle(Circle),
/// An ellipse.
Ellipse(Ellipse),
/// A polygon.
Polygon(Polygon),
}
/// An [`inset()`](https://www.w3.org/TR/css-shapes-1/#funcdef-inset) rectangle shape.
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "visitor", derive(Visit))]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[cfg_attr(feature = "jsonschema", derive(schemars::JsonSchema))]
pub struct InsetRect {
/// The rectangle.
pub rect: Rect<LengthPercentage>,
/// A corner radius for the rectangle.
pub radius: BorderRadius,
}
/// A [`circle()`](https://www.w3.org/TR/css-shapes-1/#funcdef-circle) shape.
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "visitor", derive(Visit))]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[cfg_attr(feature = "jsonschema", derive(schemars::JsonSchema))]
pub struct Circle {
/// The radius of the circle.
pub radius: ShapeRadius,
/// The position of the center of the circle.
pub position: Position,
}
/// A [`<shape-radius>`](https://www.w3.org/TR/css-shapes-1/#typedef-shape-radius) value
/// that defines the radius of a `circle()` or `ellipse()` shape.
#[derive(Debug, Clone, PartialEq, Parse, ToCss)]
#[cfg_attr(feature = "visitor", derive(Visit))]
#[cfg_attr(
feature = "serde",
derive(serde::Serialize, serde::Deserialize),
serde(tag = "type", content = "value", rename_all = "kebab-case")
)]
#[cfg_attr(feature = "jsonschema", derive(schemars::JsonSchema))]
pub enum ShapeRadius {
/// An explicit length or percentage.
LengthPercentage(LengthPercentage),
/// The length from the center to the closest side of the box.
ClosestSide,
/// The length from the center to the farthest side of the box.
FarthestSide,
}
/// An [`ellipse()`](https://www.w3.org/TR/css-shapes-1/#funcdef-ellipse) shape.
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "visitor", derive(Visit))]
#[cfg_attr(
feature = "serde",
derive(serde::Serialize, serde::Deserialize),
serde(rename_all = "camelCase")
)]
#[cfg_attr(feature = "jsonschema", derive(schemars::JsonSchema))]
pub struct Ellipse {
/// The x-radius of the ellipse.
pub radius_x: ShapeRadius,
/// The y-radius of the ellipse.
pub radius_y: ShapeRadius,
/// The position of the center of the ellipse.
pub position: Position,
}
/// A [`polygon()`](https://www.w3.org/TR/css-shapes-1/#funcdef-polygon) shape.
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "visitor", derive(Visit))]
#[cfg_attr(
feature = "serde",
derive(serde::Serialize, serde::Deserialize),
serde(rename_all = "camelCase")
)]
#[cfg_attr(feature = "jsonschema", derive(schemars::JsonSchema))]
pub struct Polygon {
/// The fill rule used to determine the interior of the polygon.
pub fill_rule: FillRule,
/// The points of each vertex of the polygon.
pub points: Vec<Point>,
}
/// A point within a `polygon()` shape.
///
/// See [Polygon](Polygon).
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "visitor", derive(Visit))]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[cfg_attr(feature = "jsonschema", derive(schemars::JsonSchema))]
pub struct Point {
/// The x position of the point.
x: LengthPercentage,
/// the y position of the point.
y: LengthPercentage,
}
enum_property! {
/// A [`<fill-rule>`](https://www.w3.org/TR/css-shapes-1/#typedef-fill-rule) used to
/// determine the interior of a `polygon()` shape.
///
/// See [Polygon](Polygon).
pub enum FillRule {
/// The `nonzero` fill rule.
Nonzero,
/// The `evenodd` fill rule.
Evenodd,
}
}
impl Default for FillRule {
fn default() -> FillRule {
FillRule::Nonzero
}
}
impl<'i> Parse<'i> for BasicShape {
fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
let location = input.current_source_location();
let f = input.expect_function()?;
match_ignore_ascii_case! { &f,
"inset" => Ok(BasicShape::Inset(input.parse_nested_block(InsetRect::parse)?)),
"circle" => Ok(BasicShape::Circle(input.parse_nested_block(Circle::parse)?)),
"ellipse" => Ok(BasicShape::Ellipse(input.parse_nested_block(Ellipse::parse)?)),
"polygon" => Ok(BasicShape::Polygon(input.parse_nested_block(Polygon::parse)?)),
_ => Err(location.new_unexpected_token_error(Token::Ident(f.clone()))),
}
}
}
impl<'i> Parse<'i> for InsetRect {
fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
let rect = Rect::parse(input)?;
let radius = if input.try_parse(|input| input.expect_ident_matching("round")).is_ok() {
BorderRadius::parse(input)?
} else {
BorderRadius::default()
};
Ok(InsetRect { rect, radius })
}
}
impl<'i> Parse<'i> for Circle {
fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
let radius = input.try_parse(ShapeRadius::parse).unwrap_or_default();
let position = if input.try_parse(|input| input.expect_ident_matching("at")).is_ok() {
Position::parse(input)?
} else {
Position::center()
};
Ok(Circle { radius, position })
}
}
impl Default for ShapeRadius {
fn default() -> ShapeRadius {
ShapeRadius::ClosestSide
}
}
impl<'i> Parse<'i> for Ellipse {
fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
let (x, y) = input
.try_parse(|input| -> Result<_, ParseError<'i, ParserError<'i>>> {
Ok((ShapeRadius::parse(input)?, ShapeRadius::parse(input)?))
})
.unwrap_or_default();
let position = if input.try_parse(|input| input.expect_ident_matching("at")).is_ok() {
Position::parse(input)?
} else {
Position::center()
};
Ok(Ellipse {
radius_x: x,
radius_y: y,
position,
})
}
}
impl<'i> Parse<'i> for Polygon {
fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
let fill_rule = input.try_parse(FillRule::parse);
if fill_rule.is_ok() {
input.expect_comma()?;
}
let points = input.parse_comma_separated(Point::parse)?;
Ok(Polygon {
fill_rule: fill_rule.unwrap_or_default(),
points,
})
}
}
impl<'i> Parse<'i> for Point {
fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
let x = LengthPercentage::parse(input)?;
let y = LengthPercentage::parse(input)?;
Ok(Point { x, y })
}
}
impl ToCss for BasicShape {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
match self {
BasicShape::Inset(rect) => {
dest.write_str("inset(")?;
rect.to_css(dest)?;
dest.write_char(')')
}
BasicShape::Circle(circle) => {
dest.write_str("circle(")?;
circle.to_css(dest)?;
dest.write_char(')')
}
BasicShape::Ellipse(ellipse) => {
dest.write_str("ellipse(")?;
ellipse.to_css(dest)?;
dest.write_char(')')
}
BasicShape::Polygon(poly) => {
dest.write_str("polygon(")?;
poly.to_css(dest)?;
dest.write_char(')')
}
}
}
}
impl ToCss for InsetRect {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
self.rect.to_css(dest)?;
if self.radius != BorderRadius::default() {
dest.write_str(" round ")?;
self.radius.to_css(dest)?;
}
Ok(())
}
}
impl ToCss for Circle {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
let mut has_output = false;
if self.radius != ShapeRadius::default() {
self.radius.to_css(dest)?;
has_output = true;
}
if !self.position.is_center() {
if has_output {
dest.write_char(' ')?;
}
dest.write_str("at ")?;
self.position.to_css(dest)?;
}
Ok(())
}
}
impl ToCss for Ellipse {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
let mut has_output = false;
if self.radius_x != ShapeRadius::default() || self.radius_y != ShapeRadius::default() {
self.radius_x.to_css(dest)?;
dest.write_char(' ')?;
self.radius_y.to_css(dest)?;
has_output = true;
}
if !self.position.is_center() {
if has_output {
dest.write_char(' ')?;
}
dest.write_str("at ")?;
self.position.to_css(dest)?;
}
Ok(())
}
}
impl ToCss for Polygon {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
if self.fill_rule != FillRule::default() {
self.fill_rule.to_css(dest)?;
dest.delim(',', false)?;
}
let mut first = true;
for point in &self.points {
if first {
first = false;
} else {
dest.delim(',', false)?;
}
point.to_css(dest)?;
}
Ok(())
}
}
impl ToCss for Point {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
self.x.to_css(dest)?;
dest.write_char(' ')?;
self.y.to_css(dest)
}
}