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81 lines
2.5 KiB
Rust
81 lines
2.5 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! CSS handling for the computed value of
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//! [`position`][position] values.
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//!
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//! [position]: https://drafts.csswg.org/css-backgrounds-3/#position
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use std::fmt;
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use style_traits::ToCss;
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use values::computed::LengthOrPercentage;
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use values::generics::position::{Position as GenericPosition, PositionWithKeyword};
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use values::generics::position::HorizontalPosition as GenericHorizontalPosition;
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use values::generics::position::VerticalPosition as GenericVerticalPosition;
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/// The computed value of a CSS `<position>`
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pub type Position = PositionWithKeyword<LengthOrPercentage>;
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impl Copy for Position {}
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/// The computed value for `<position>` values without a keyword.
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pub type OriginPosition = GenericPosition<LengthOrPercentage, LengthOrPercentage>;
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impl Copy for OriginPosition {}
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impl OriginPosition {
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#[inline]
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/// The initial value for `perspective-origin`
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pub fn center() -> OriginPosition {
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GenericPosition {
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horizontal: LengthOrPercentage::Percentage(0.5),
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vertical: LengthOrPercentage::Percentage(0.5),
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}
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}
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}
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impl Position {
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#[inline]
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/// Construct a position at (0, 0)
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pub fn zero() -> Self {
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Position {
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horizontal: GenericHorizontalPosition(LengthOrPercentage::zero()),
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vertical: GenericVerticalPosition(LengthOrPercentage::zero()),
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}
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}
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}
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impl ToCss for Position {
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fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
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self.horizontal.to_css(dest)?;
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dest.write_str(" ")?;
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self.vertical.to_css(dest)
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}
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}
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/// The computed value of a horizontal `<position>`
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pub type HorizontalPosition = GenericHorizontalPosition<LengthOrPercentage>;
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impl Copy for HorizontalPosition {}
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impl HorizontalPosition {
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#[inline]
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/// Create a zero position value.
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pub fn zero() -> HorizontalPosition {
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GenericHorizontalPosition(LengthOrPercentage::Percentage(0.0))
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}
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}
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/// The computed value of a vertical `<position>`
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pub type VerticalPosition = GenericVerticalPosition<LengthOrPercentage>;
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impl Copy for VerticalPosition {}
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impl VerticalPosition {
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#[inline]
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/// Create a zero position value.
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pub fn zero() -> VerticalPosition {
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GenericVerticalPosition(LengthOrPercentage::Percentage(0.0))
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}
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}
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