09de3b4d02
Servo-side part of https://bugzilla.mozilla.org/show_bug.cgi?id=1408305, reviewed there by Xidorn. Source-Repo: https://github.com/servo/servo Source-Revision: ac74cd57a257fc95e0513524e196c91807c18bba
95 lines
3.2 KiB
Rust
95 lines
3.2 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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//! Specified types for legacy Gecko-only properties.
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use cssparser::{Parser, Token};
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use gecko_bindings::structs;
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use gecko_bindings::sugar::ns_css_value::ToNsCssValue;
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use parser::{Parse, ParserContext};
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use style_traits::{ParseError, StyleParseErrorKind};
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use values::CSSFloat;
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use values::computed;
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use values::generics::gecko::ScrollSnapPoint as GenericScrollSnapPoint;
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use values::generics::rect::Rect;
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use values::specified::length::LengthOrPercentage;
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/// A specified type for scroll snap points.
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pub type ScrollSnapPoint = GenericScrollSnapPoint<LengthOrPercentage>;
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impl Parse for ScrollSnapPoint {
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fn parse<'i, 't>(context: &ParserContext, input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
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if input.try(|i| i.expect_ident_matching("none")).is_ok() {
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return Ok(GenericScrollSnapPoint::None);
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}
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input.expect_function_matching("repeat")?;
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let length = input.parse_nested_block(|i| {
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LengthOrPercentage::parse_non_negative(context, i)
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})?;
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Ok(GenericScrollSnapPoint::Repeat(length))
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}
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}
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/// A component of an IntersectionObserverRootMargin.
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#[derive(Clone, Copy, Debug, PartialEq)]
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pub enum PixelOrPercentage {
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/// An absolute length in pixels (px)
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Px(CSSFloat),
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/// A percentage (%)
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Percentage(computed::Percentage),
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}
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impl Parse for PixelOrPercentage {
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fn parse<'i, 't>(
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_context: &ParserContext,
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input: &mut Parser<'i, 't>
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) -> Result<Self, ParseError<'i>> {
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let location = input.current_source_location();
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let token = input.next()?;
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let value = match *token {
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Token::Dimension { value, ref unit, .. } => {
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match_ignore_ascii_case! { unit,
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"px" => Ok(PixelOrPercentage::Px(value)),
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_ => Err(()),
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}
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}
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Token::Percentage { unit_value, .. } => {
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Ok(PixelOrPercentage::Percentage(
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computed::Percentage(unit_value)
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))
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}
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_ => Err(()),
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};
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value.map_err(|()| {
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location.new_custom_error(StyleParseErrorKind::UnspecifiedError)
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})
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}
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}
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impl ToNsCssValue for PixelOrPercentage {
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fn convert(self, nscssvalue: &mut structs::nsCSSValue) {
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match self {
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PixelOrPercentage::Px(px) => {
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unsafe { nscssvalue.set_px(px); }
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}
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PixelOrPercentage::Percentage(pc) => {
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unsafe { nscssvalue.set_percentage(pc.0); }
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}
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}
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}
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}
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/// The value of an IntersectionObserver's rootMargin property.
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pub struct IntersectionObserverRootMargin(pub Rect<PixelOrPercentage>);
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impl Parse for IntersectionObserverRootMargin {
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fn parse<'i, 't>(
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context: &ParserContext,
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input: &mut Parser<'i, 't>,
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) -> Result<Self, ParseError<'i>> {
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let rect = Rect::parse_with(context, input, PixelOrPercentage::parse)?;
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Ok(IntersectionObserverRootMargin(rect))
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}
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}
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