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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
//! Computed types for text properties.
#[cfg(feature = "servo")]
use crate::properties::StyleBuilder;
use crate::values::computed::length::LengthPercentage;
use crate::values::generics::text::{
GenericInitialLetter, GenericTextDecorationLength, GenericTextIndent,
};
use crate::values::specified::text as specified;
use crate::values::specified::text::{TextEmphasisFillMode, TextEmphasisShapeKeyword};
use crate::values::{CSSFloat, CSSInteger};
use crate::Zero;
use std::fmt::{self, Write};
use style_traits::{CssWriter, ToCss};
pub use crate::values::specified::text::{
HyphenateCharacter, LineBreak, MozControlCharacterVisibility, OverflowWrap, RubyPosition,
TextAlignLast, TextDecorationLine, TextDecorationSkipInk, TextEmphasisPosition, TextJustify,
TextOverflow, TextTransform, TextUnderlinePosition, WordBreak,
};
/// A computed value for the `initial-letter` property.
pub type InitialLetter = GenericInitialLetter<CSSFloat, CSSInteger>;
/// Implements type for `text-decoration-thickness` property.
pub type TextDecorationLength = GenericTextDecorationLength<LengthPercentage>;
/// The computed value of `text-align`.
pub type TextAlign = specified::TextAlignKeyword;
/// The computed value of `text-indent`.
pub type TextIndent = GenericTextIndent<LengthPercentage>;
/// A computed value for the `letter-spacing` property.
#[repr(transparent)]
#[derive(
Animate,
Clone,
ComputeSquaredDistance,
Copy,
Debug,
MallocSizeOf,
PartialEq,
ToAnimatedValue,
ToAnimatedZero,
ToResolvedValue,
)]
pub struct GenericLetterSpacing<L>(pub L);
/// This is generic just to make the #[derive()] code do the right thing for lengths.
pub type LetterSpacing = GenericLetterSpacing<LengthPercentage>;
impl LetterSpacing {
/// Return the `normal` computed value, which is just zero.
#[inline]
pub fn normal() -> Self {
Self(LengthPercentage::zero())
}
}
impl ToCss for LetterSpacing {
fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
where
W: Write,
{
//
// For legacy reasons, a computed letter-spacing of zero yields a
// resolved value (getComputedStyle() return value) of normal.
if self.0.is_zero() {
return dest.write_str("normal");
}
self.0.to_css(dest)
}
}
/// A computed value for the `word-spacing` property.
pub type WordSpacing = LengthPercentage;
impl WordSpacing {
/// Return the `normal` computed value, which is just zero.
#[inline]
pub fn normal() -> Self {
LengthPercentage::zero()
}
}
/// A struct that represents the _used_ value of the text-decoration property.
///
/// FIXME(emilio): This is done at style resolution time, though probably should
/// be done at layout time, otherwise we need to account for display: contents
/// and similar stuff when we implement it.
///
/// FIXME(emilio): Also, should be just a bitfield instead of three bytes.
#[derive(Clone, Copy, Debug, Default, MallocSizeOf, PartialEq, ToResolvedValue)]
pub struct TextDecorationsInEffect {
/// Whether an underline is in effect.
pub underline: bool,
/// Whether an overline decoration is in effect.
pub overline: bool,
/// Whether a line-through style is in effect.
pub line_through: bool,
}
impl TextDecorationsInEffect {
/// Computes the text-decorations in effect for a given style.
#[cfg(feature = "servo")]
pub fn from_style(style: &StyleBuilder) -> Self {
// Start with no declarations if this is an atomic inline-level box;
// otherwise, start with the declarations in effect and add in the text
// decorations that this block specifies.
let mut result = if style.get_box().clone_display().is_atomic_inline_level() {
Self::default()
} else {
style
.get_parent_inherited_text()
.text_decorations_in_effect
.clone()
};
let line = style.get_text().clone_text_decoration_line();
result.underline |= line.contains(TextDecorationLine::UNDERLINE);
result.overline |= line.contains(TextDecorationLine::OVERLINE);
result.line_through |= line.contains(TextDecorationLine::LINE_THROUGH);
result
}
}
/// Computed value for the text-emphasis-style property
#[derive(Clone, Debug, MallocSizeOf, PartialEq, ToCss, ToResolvedValue)]
#[allow(missing_docs)]
#[repr(C, u8)]
pub enum TextEmphasisStyle {
/// [ <fill> || <shape> ]
Keyword {
#[css(skip_if = "TextEmphasisFillMode::is_filled")]
fill: TextEmphasisFillMode,
shape: TextEmphasisShapeKeyword,
},
/// `none`
None,
/// `<string>` (of which only the first grapheme cluster will be used).
String(crate::OwnedStr),
}