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323221051f
This doesn't change the way C++ code uses static prefs. But it does slightly change how Rust code uses static prefs, specifically the name generated by bindgen is slightly different. The commit also improves some comments. Differential Revision: https://phabricator.services.mozilla.com/D35764
127 lines
2.9 KiB
Rust
127 lines
2.9 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 https://mozilla.org/MPL/2.0/. */
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//! Generic types for text properties.
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use crate::parser::ParserContext;
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use crate::values::animated::ToAnimatedZero;
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use cssparser::Parser;
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use style_traits::ParseError;
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/// A generic value for the `initial-letter` property.
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#[derive(
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Clone,
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Copy,
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Debug,
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MallocSizeOf,
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PartialEq,
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SpecifiedValueInfo,
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ToComputedValue,
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ToCss,
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ToResolvedValue,
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ToShmem,
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)]
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pub enum InitialLetter<Number, Integer> {
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/// `normal`
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Normal,
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/// `<number> <integer>?`
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Specified(Number, Option<Integer>),
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}
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impl<N, I> InitialLetter<N, I> {
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/// Returns `normal`.
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#[inline]
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pub fn normal() -> Self {
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InitialLetter::Normal
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}
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}
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/// A generic spacing value for the `letter-spacing` and `word-spacing` properties.
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#[derive(Clone, Copy, Debug, MallocSizeOf, PartialEq, SpecifiedValueInfo, ToCss, ToShmem)]
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pub enum Spacing<Value> {
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/// `normal`
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Normal,
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/// `<value>`
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Value(Value),
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}
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impl<Value> Spacing<Value> {
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/// Returns `normal`.
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#[inline]
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pub fn normal() -> Self {
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Spacing::Normal
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}
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/// Parses.
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#[inline]
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pub fn parse_with<'i, 't, F>(
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context: &ParserContext,
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input: &mut Parser<'i, 't>,
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parse: F,
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) -> Result<Self, ParseError<'i>>
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where
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F: FnOnce(&ParserContext, &mut Parser<'i, 't>) -> Result<Value, ParseError<'i>>,
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{
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if input.try(|i| i.expect_ident_matching("normal")).is_ok() {
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return Ok(Spacing::Normal);
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}
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parse(context, input).map(Spacing::Value)
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}
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}
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#[cfg(feature = "gecko")]
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fn line_height_moz_block_height_enabled(context: &ParserContext) -> bool {
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use crate::gecko_bindings::structs;
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context.in_ua_sheet() ||
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unsafe {
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structs::StaticPrefs::sVarCache_layout_css_line_height_moz_block_height_content_enabled
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}
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}
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/// A generic value for the `line-height` property.
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#[derive(
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Animate,
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Clone,
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ComputeSquaredDistance,
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Copy,
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Debug,
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MallocSizeOf,
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PartialEq,
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SpecifiedValueInfo,
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ToAnimatedValue,
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ToCss,
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ToShmem,
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ToResolvedValue,
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Parse,
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)]
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#[repr(C, u8)]
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pub enum GenericLineHeight<N, L> {
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/// `normal`
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Normal,
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/// `-moz-block-height`
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#[cfg(feature = "gecko")]
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#[parse(condition = "line_height_moz_block_height_enabled")]
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MozBlockHeight,
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/// `<number>`
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Number(N),
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/// `<length-percentage>`
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Length(L),
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}
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pub use self::GenericLineHeight as LineHeight;
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impl<N, L> ToAnimatedZero for LineHeight<N, L> {
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#[inline]
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fn to_animated_zero(&self) -> Result<Self, ()> {
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Err(())
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}
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}
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impl<N, L> LineHeight<N, L> {
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/// Returns `normal`.
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#[inline]
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pub fn normal() -> Self {
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LineHeight::Normal
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}
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}
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