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Diffstat (limited to 'servo/components/style/values/generics/text.rs')
-rw-r--r-- | servo/components/style/values/generics/text.rs | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/servo/components/style/values/generics/text.rs b/servo/components/style/values/generics/text.rs new file mode 100644 index 0000000000..ef2647b014 --- /dev/null +++ b/servo/components/style/values/generics/text.rs @@ -0,0 +1,148 @@ +/* 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 https://mozilla.org/MPL/2.0/. */ + +//! Generic types for text properties. + +use crate::parser::ParserContext; +use crate::Zero; +use cssparser::Parser; +use style_traits::ParseError; + +/// A generic value for the `initial-letter` property. +#[derive( + Clone, + Copy, + Debug, + MallocSizeOf, + PartialEq, + SpecifiedValueInfo, + ToComputedValue, + ToCss, + ToResolvedValue, + ToShmem, +)] +pub enum InitialLetter<Number, Integer> { + /// `normal` + Normal, + /// `<number> <integer>?` + Specified(Number, Option<Integer>), +} + +impl<N, I> InitialLetter<N, I> { + /// Returns `normal`. + #[inline] + pub fn normal() -> Self { + InitialLetter::Normal + } +} + +/// A generic spacing value for the `letter-spacing` and `word-spacing` properties. +#[derive(Clone, Copy, Debug, MallocSizeOf, PartialEq, SpecifiedValueInfo, ToCss, ToShmem)] +pub enum Spacing<Value> { + /// `normal` + Normal, + /// `<value>` + Value(Value), +} + +impl<Value> Spacing<Value> { + /// Returns `normal`. + #[inline] + pub fn normal() -> Self { + Spacing::Normal + } + + /// Parses. + #[inline] + pub fn parse_with<'i, 't, F>( + context: &ParserContext, + input: &mut Parser<'i, 't>, + parse: F, + ) -> Result<Self, ParseError<'i>> + where + F: FnOnce(&ParserContext, &mut Parser<'i, 't>) -> Result<Value, ParseError<'i>>, + { + if input + .try_parse(|i| i.expect_ident_matching("normal")) + .is_ok() + { + return Ok(Spacing::Normal); + } + parse(context, input).map(Spacing::Value) + } +} + +/// Implements type for text-decoration-thickness +/// which takes the grammar of auto | from-font | <length> | <percentage> +/// +/// https://drafts.csswg.org/css-text-decor-4/ +#[repr(C, u8)] +#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))] +#[derive( + Animate, + Clone, + Copy, + ComputeSquaredDistance, + ToAnimatedZero, + Debug, + Eq, + MallocSizeOf, + Parse, + PartialEq, + SpecifiedValueInfo, + ToComputedValue, + ToCss, + ToResolvedValue, + ToShmem, +)] +#[allow(missing_docs)] +pub enum GenericTextDecorationLength<L> { + LengthPercentage(L), + Auto, + FromFont, +} + +/// Implements type for text-indent +/// which takes the grammar of [<length-percentage>] && hanging? && each-line? +/// +/// https://drafts.csswg.org/css-text/#propdef-text-indent +#[repr(C)] +#[derive( + Animate, + Clone, + ComputeSquaredDistance, + Debug, + Eq, + MallocSizeOf, + PartialEq, + SpecifiedValueInfo, + ToAnimatedZero, + ToComputedValue, + ToCss, + ToResolvedValue, + ToShmem, +)] +pub struct GenericTextIndent<LengthPercentage> { + /// The amount of indent to be applied to the inline-start of the first line. + pub length: LengthPercentage, + /// Apply indent to non-first lines instead of first. + #[animation(constant)] + #[css(represents_keyword)] + pub hanging: bool, + /// Apply to each line after a hard break, not only first in block. + #[animation(constant)] + #[css(represents_keyword)] + pub each_line: bool, +} + +impl<LengthPercentage: Zero> GenericTextIndent<LengthPercentage> { + /// Return the initial zero value. + pub fn zero() -> Self { + Self { + length: LengthPercentage::zero(), + hanging: false, + each_line: false, + } + } +} |