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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! Specified types for legacy Gecko-only properties.
use cssparser::{Parser, Token};
use gecko_bindings::structs;
use gecko_bindings::sugar::ns_css_value::ToNsCssValue;
use parser::{Parse, ParserContext};
use style_traits::{ParseError, StyleParseErrorKind};
use values::CSSFloat;
use values::computed;
use values::generics::gecko::ScrollSnapPoint as GenericScrollSnapPoint;
use values::generics::rect::Rect;
use values::specified::length::LengthOrPercentage;
/// A specified type for scroll snap points.
pub type ScrollSnapPoint = GenericScrollSnapPoint<LengthOrPercentage>;
impl Parse for ScrollSnapPoint {
fn parse<'i, 't>(context: &ParserContext, input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
if input.try(|i| i.expect_ident_matching("none")).is_ok() {
return Ok(GenericScrollSnapPoint::None);
}
input.expect_function_matching("repeat")?;
let length = input.parse_nested_block(|i| {
LengthOrPercentage::parse_non_negative(context, i)
})?;
Ok(GenericScrollSnapPoint::Repeat(length))
}
}
/// A component of an IntersectionObserverRootMargin.
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum PixelOrPercentage {
/// An absolute length in pixels (px)
Px(CSSFloat),
/// A percentage (%)
Percentage(computed::Percentage),
}
impl Parse for PixelOrPercentage {
fn parse<'i, 't>(
_context: &ParserContext,
input: &mut Parser<'i, 't>
) -> Result<Self, ParseError<'i>> {
let location = input.current_source_location();
let token = input.next()?;
let value = match *token {
Token::Dimension { value, ref unit, .. } => {
match_ignore_ascii_case! { unit,
"px" => Ok(PixelOrPercentage::Px(value)),
_ => Err(()),
}
}
Token::Percentage { unit_value, .. } => {
Ok(PixelOrPercentage::Percentage(
computed::Percentage(unit_value)
))
}
_ => Err(()),
};
value.map_err(|()| {
location.new_custom_error(StyleParseErrorKind::UnspecifiedError)
})
}
}
impl ToNsCssValue for PixelOrPercentage {
fn convert(self, nscssvalue: &mut structs::nsCSSValue) {
match self {
PixelOrPercentage::Px(px) => {
unsafe { nscssvalue.set_px(px); }
}
PixelOrPercentage::Percentage(pc) => {
unsafe { nscssvalue.set_percentage(pc.0); }
}
}
}
}
/// The value of an IntersectionObserver's rootMargin property.
pub struct IntersectionObserverRootMargin(pub Rect<PixelOrPercentage>);
impl Parse for IntersectionObserverRootMargin {
fn parse<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>,
) -> Result<Self, ParseError<'i>> {
let rect = Rect::parse_with(context, input, PixelOrPercentage::parse)?;
Ok(IntersectionObserverRootMargin(rect))
}
}
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