summaryrefslogtreecommitdiffstats
path: root/servo/components/style/values/specified/mod.rs
diff options
context:
space:
mode:
Diffstat (limited to 'servo/components/style/values/specified/mod.rs')
-rw-r--r--servo/components/style/values/specified/mod.rs954
1 files changed, 954 insertions, 0 deletions
diff --git a/servo/components/style/values/specified/mod.rs b/servo/components/style/values/specified/mod.rs
new file mode 100644
index 0000000000..f247b7f948
--- /dev/null
+++ b/servo/components/style/values/specified/mod.rs
@@ -0,0 +1,954 @@
+/* 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/. */
+
+//! Specified values.
+//!
+//! TODO(emilio): Enhance docs.
+
+use super::computed::transform::DirectionVector;
+use super::computed::{Context, ToComputedValue};
+use super::generics::grid::ImplicitGridTracks as GenericImplicitGridTracks;
+use super::generics::grid::{GridLine as GenericGridLine, TrackBreadth as GenericTrackBreadth};
+use super::generics::grid::{TrackList as GenericTrackList, TrackSize as GenericTrackSize};
+use super::generics::transform::IsParallelTo;
+use super::generics::{self, GreaterThanOrEqualToOne, NonNegative};
+use super::{CSSFloat, CSSInteger};
+use crate::context::QuirksMode;
+use crate::parser::{Parse, ParserContext};
+use crate::values::serialize_atom_identifier;
+use crate::values::specified::calc::CalcNode;
+use crate::{Atom, Namespace, One, Prefix, Zero};
+use cssparser::{Parser, Token};
+use std::fmt::{self, Write};
+use std::ops::Add;
+use style_traits::values::specified::AllowedNumericType;
+use style_traits::{CssWriter, ParseError, SpecifiedValueInfo, StyleParseErrorKind, ToCss};
+
+#[cfg(feature = "gecko")]
+pub use self::align::{AlignContent, AlignItems, AlignSelf, AlignTracks, ContentDistribution};
+#[cfg(feature = "gecko")]
+pub use self::align::{JustifyContent, JustifyItems, JustifySelf, JustifyTracks, SelfAlignment};
+pub use self::angle::{AllowUnitlessZeroAngle, Angle};
+pub use self::animation::{AnimationIterationCount, AnimationName, AnimationTimeline};
+pub use self::animation::{ScrollAxis, ScrollTimelineName, TransitionProperty, ViewTimelineInset};
+pub use self::background::{BackgroundRepeat, BackgroundSize};
+pub use self::basic_shape::FillRule;
+pub use self::border::{
+ BorderCornerRadius, BorderImageRepeat, BorderImageSideWidth, BorderImageSlice,
+ BorderImageWidth, BorderRadius, BorderSideWidth, BorderSpacing, BorderStyle, LineWidth,
+};
+pub use self::box_::{
+ Appearance, BreakBetween, BaselineSource, BreakWithin, Contain, ContainerName, ContainerType,
+ Clear, ContainIntrinsicSize, ContentVisibility, Display, Float, LineClamp, Overflow,
+ OverflowAnchor, OverflowClipBox, OverscrollBehavior, Perspective, Resize, ScrollbarGutter,
+ ScrollSnapAlign, ScrollSnapAxis, ScrollSnapStop, ScrollSnapStrictness, ScrollSnapType,
+ TouchAction, VerticalAlign, WillChange,
+};
+pub use self::color::{
+ Color, ColorOrAuto, ColorPropertyValue, ColorScheme, ForcedColorAdjust, PrintColorAdjust,
+};
+pub use self::column::ColumnCount;
+pub use self::counters::{Content, ContentItem, CounterIncrement, CounterReset, CounterSet};
+pub use self::easing::TimingFunction;
+pub use self::effects::{BoxShadow, Filter, SimpleShadow};
+pub use self::flex::FlexBasis;
+pub use self::font::{FontFamily, FontLanguageOverride, FontPalette, FontStyle};
+pub use self::font::{FontFeatureSettings, FontVariantLigatures, FontVariantNumeric};
+pub use self::font::{FontSize, FontSizeAdjust, FontSizeKeyword, FontStretch, FontSynthesis};
+pub use self::font::{FontVariantAlternates, FontWeight};
+pub use self::font::{FontVariantEastAsian, FontVariationSettings};
+pub use self::font::{MathDepth, MozScriptMinSize, MozScriptSizeMultiplier, XLang, XTextScale};
+pub use self::image::{EndingShape as GradientEndingShape, Gradient};
+pub use self::image::{Image, ImageRendering, MozImageRect};
+pub use self::length::{AbsoluteLength, CalcLengthPercentage, CharacterWidth};
+pub use self::length::{FontRelativeLength, Length, LengthOrNumber, NonNegativeLengthOrNumber};
+pub use self::length::{LengthOrAuto, LengthPercentage, LengthPercentageOrAuto};
+pub use self::length::{MaxSize, Size};
+pub use self::length::{NoCalcLength, ViewportPercentageLength, ViewportVariant};
+pub use self::length::{
+ NonNegativeLength, NonNegativeLengthPercentage, NonNegativeLengthPercentageOrAuto,
+};
+#[cfg(feature = "gecko")]
+pub use self::list::ListStyleType;
+pub use self::list::Quotes;
+pub use self::motion::{OffsetPath, OffsetPosition, OffsetRotate};
+pub use self::outline::OutlineStyle;
+pub use self::page::{PageName, PageOrientation, PageSize, PageSizeOrientation, PaperSize};
+pub use self::percentage::{NonNegativePercentage, Percentage};
+pub use self::position::AspectRatio;
+pub use self::position::{GridAutoFlow, GridTemplateAreas, Position, PositionOrAuto};
+pub use self::position::{MasonryAutoFlow, MasonryItemOrder, MasonryPlacement};
+pub use self::position::{PositionComponent, ZIndex};
+pub use self::ratio::Ratio;
+pub use self::rect::NonNegativeLengthOrNumberRect;
+pub use self::resolution::Resolution;
+pub use self::svg::{DProperty, MozContextProperties};
+pub use self::svg::{SVGLength, SVGOpacity, SVGPaint};
+pub use self::svg::{SVGPaintOrder, SVGStrokeDashArray, SVGWidth};
+pub use self::svg_path::SVGPathData;
+pub use self::text::HyphenateCharacter;
+pub use self::text::RubyPosition;
+pub use self::text::TextAlignLast;
+pub use self::text::TextUnderlinePosition;
+pub use self::text::{InitialLetter, LetterSpacing, LineBreak, LineHeight, TextAlign};
+pub use self::text::{OverflowWrap, TextEmphasisPosition, TextEmphasisStyle, WordBreak};
+pub use self::text::{TextAlignKeyword, TextDecorationLine, TextOverflow, WordSpacing};
+pub use self::text::{TextDecorationLength, TextDecorationSkipInk, TextJustify, TextTransform};
+pub use self::time::Time;
+pub use self::transform::{Rotate, Scale, Transform};
+pub use self::transform::{TransformOrigin, TransformStyle, Translate};
+#[cfg(feature = "gecko")]
+pub use self::ui::CursorImage;
+pub use self::ui::{BoolInteger, Cursor, UserSelect};
+pub use super::generics::grid::GridTemplateComponent as GenericGridTemplateComponent;
+
+#[cfg(feature = "gecko")]
+pub mod align;
+pub mod angle;
+pub mod animation;
+pub mod background;
+pub mod basic_shape;
+pub mod border;
+#[path = "box.rs"]
+pub mod box_;
+pub mod calc;
+pub mod color;
+pub mod column;
+pub mod counters;
+pub mod easing;
+pub mod effects;
+pub mod flex;
+pub mod font;
+#[cfg(feature = "gecko")]
+pub mod gecko;
+pub mod grid;
+pub mod image;
+pub mod length;
+pub mod list;
+pub mod motion;
+pub mod outline;
+pub mod page;
+pub mod percentage;
+pub mod position;
+pub mod ratio;
+pub mod rect;
+pub mod resolution;
+pub mod source_size_list;
+pub mod svg;
+pub mod svg_path;
+pub mod table;
+pub mod text;
+pub mod time;
+pub mod transform;
+pub mod ui;
+pub mod url;
+
+/// <angle> | <percentage>
+/// https://drafts.csswg.org/css-values/#typedef-angle-percentage
+#[allow(missing_docs)]
+#[derive(Clone, Copy, Debug, MallocSizeOf, PartialEq, SpecifiedValueInfo, ToCss, ToShmem)]
+pub enum AngleOrPercentage {
+ Percentage(Percentage),
+ Angle(Angle),
+}
+
+impl AngleOrPercentage {
+ fn parse_internal<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ allow_unitless_zero: AllowUnitlessZeroAngle,
+ ) -> Result<Self, ParseError<'i>> {
+ if let Ok(per) = input.try_parse(|i| Percentage::parse(context, i)) {
+ return Ok(AngleOrPercentage::Percentage(per));
+ }
+
+ Angle::parse_internal(context, input, allow_unitless_zero).map(AngleOrPercentage::Angle)
+ }
+
+ /// Allow unitless angles, used for conic-gradients as specified by the spec.
+ /// https://drafts.csswg.org/css-images-4/#valdef-conic-gradient-angle
+ pub fn parse_with_unitless<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ AngleOrPercentage::parse_internal(context, input, AllowUnitlessZeroAngle::Yes)
+ }
+}
+
+impl Parse for AngleOrPercentage {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ AngleOrPercentage::parse_internal(context, input, AllowUnitlessZeroAngle::No)
+ }
+}
+
+/// Parse a `<number>` value, with a given clamping mode.
+fn parse_number_with_clamping_mode<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ clamping_mode: AllowedNumericType,
+) -> Result<Number, ParseError<'i>> {
+ let location = input.current_source_location();
+ match *input.next()? {
+ Token::Number { value, .. } if clamping_mode.is_ok(context.parsing_mode, value) => {
+ Ok(Number {
+ value: value.min(f32::MAX).max(f32::MIN),
+ calc_clamping_mode: None,
+ })
+ },
+ Token::Function(ref name) => {
+ let function = CalcNode::math_function(context, name, location)?;
+ let result = CalcNode::parse_number(context, input, function)?;
+ Ok(Number {
+ value: result.min(f32::MAX).max(f32::MIN),
+ calc_clamping_mode: Some(clamping_mode),
+ })
+ },
+ ref t => Err(location.new_unexpected_token_error(t.clone())),
+ }
+}
+
+/// A CSS `<number>` specified value.
+///
+/// https://drafts.csswg.org/css-values-3/#number-value
+#[derive(Clone, Copy, Debug, MallocSizeOf, PartialEq, PartialOrd, ToShmem)]
+pub struct Number {
+ /// The numeric value itself.
+ value: CSSFloat,
+ /// If this number came from a calc() expression, this tells how clamping
+ /// should be done on the value.
+ calc_clamping_mode: Option<AllowedNumericType>,
+}
+
+impl Parse for Number {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ parse_number_with_clamping_mode(context, input, AllowedNumericType::All)
+ }
+}
+
+impl Number {
+ /// Returns a new number with the value `val`.
+ fn new_with_clamping_mode(
+ value: CSSFloat,
+ calc_clamping_mode: Option<AllowedNumericType>,
+ ) -> Self {
+ Self {
+ value,
+ calc_clamping_mode,
+ }
+ }
+
+ /// Returns this percentage as a number.
+ pub fn to_percentage(&self) -> Percentage {
+ Percentage::new_with_clamping_mode(self.value, self.calc_clamping_mode)
+ }
+
+ /// Returns a new number with the value `val`.
+ pub fn new(val: CSSFloat) -> Self {
+ Self::new_with_clamping_mode(val, None)
+ }
+
+ /// Returns whether this number came from a `calc()` expression.
+ #[inline]
+ pub fn was_calc(&self) -> bool {
+ self.calc_clamping_mode.is_some()
+ }
+
+ /// Returns the numeric value, clamped if needed.
+ #[inline]
+ pub fn get(&self) -> f32 {
+ self.calc_clamping_mode
+ .map_or(self.value, |mode| mode.clamp(self.value))
+ }
+
+ #[allow(missing_docs)]
+ pub fn parse_non_negative<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Number, ParseError<'i>> {
+ parse_number_with_clamping_mode(context, input, AllowedNumericType::NonNegative)
+ }
+
+ #[allow(missing_docs)]
+ pub fn parse_at_least_one<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Number, ParseError<'i>> {
+ parse_number_with_clamping_mode(context, input, AllowedNumericType::AtLeastOne)
+ }
+
+ /// Clamp to 1.0 if the value is over 1.0.
+ #[inline]
+ pub fn clamp_to_one(self) -> Self {
+ Number {
+ value: self.value.min(1.),
+ calc_clamping_mode: self.calc_clamping_mode,
+ }
+ }
+}
+
+impl ToComputedValue for Number {
+ type ComputedValue = CSSFloat;
+
+ #[inline]
+ fn to_computed_value(&self, _: &Context) -> CSSFloat {
+ self.get()
+ }
+
+ #[inline]
+ fn from_computed_value(computed: &CSSFloat) -> Self {
+ Number {
+ value: *computed,
+ calc_clamping_mode: None,
+ }
+ }
+}
+
+impl ToCss for Number {
+ fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
+ where
+ W: Write,
+ {
+ if self.calc_clamping_mode.is_some() {
+ dest.write_str("calc(")?;
+ }
+ self.value.to_css(dest)?;
+ if self.calc_clamping_mode.is_some() {
+ dest.write_char(')')?;
+ }
+ Ok(())
+ }
+}
+
+impl IsParallelTo for (Number, Number, Number) {
+ fn is_parallel_to(&self, vector: &DirectionVector) -> bool {
+ use euclid::approxeq::ApproxEq;
+ // If a and b is parallel, the angle between them is 0deg, so
+ // a x b = |a|*|b|*sin(0)*n = 0 * n, |a x b| == 0.
+ let self_vector = DirectionVector::new(self.0.get(), self.1.get(), self.2.get());
+ self_vector
+ .cross(*vector)
+ .square_length()
+ .approx_eq(&0.0f32)
+ }
+}
+
+impl SpecifiedValueInfo for Number {}
+
+impl Add for Number {
+ type Output = Self;
+
+ fn add(self, other: Self) -> Self {
+ Self::new(self.get() + other.get())
+ }
+}
+
+impl Zero for Number {
+ #[inline]
+ fn zero() -> Self {
+ Self::new(0.)
+ }
+
+ #[inline]
+ fn is_zero(&self) -> bool {
+ self.get() == 0.
+ }
+}
+
+impl From<Number> for f32 {
+ #[inline]
+ fn from(n: Number) -> Self {
+ n.get()
+ }
+}
+
+impl From<Number> for f64 {
+ #[inline]
+ fn from(n: Number) -> Self {
+ n.get() as f64
+ }
+}
+
+/// A Number which is >= 0.0.
+pub type NonNegativeNumber = NonNegative<Number>;
+
+impl Parse for NonNegativeNumber {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ parse_number_with_clamping_mode(context, input, AllowedNumericType::NonNegative)
+ .map(NonNegative::<Number>)
+ }
+}
+
+impl One for NonNegativeNumber {
+ #[inline]
+ fn one() -> Self {
+ NonNegativeNumber::new(1.0)
+ }
+
+ #[inline]
+ fn is_one(&self) -> bool {
+ self.get() == 1.0
+ }
+}
+
+impl NonNegativeNumber {
+ /// Returns a new non-negative number with the value `val`.
+ pub fn new(val: CSSFloat) -> Self {
+ NonNegative::<Number>(Number::new(val.max(0.)))
+ }
+
+ /// Returns the numeric value.
+ #[inline]
+ pub fn get(&self) -> f32 {
+ self.0.get()
+ }
+}
+
+/// An Integer which is >= 0.
+pub type NonNegativeInteger = NonNegative<Integer>;
+
+impl Parse for NonNegativeInteger {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ Ok(NonNegative(Integer::parse_non_negative(context, input)?))
+ }
+}
+
+/// A Number which is >= 1.0.
+pub type GreaterThanOrEqualToOneNumber = GreaterThanOrEqualToOne<Number>;
+
+impl Parse for GreaterThanOrEqualToOneNumber {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ parse_number_with_clamping_mode(context, input, AllowedNumericType::AtLeastOne)
+ .map(GreaterThanOrEqualToOne::<Number>)
+ }
+}
+
+/// <number> | <percentage>
+///
+/// Accepts only non-negative numbers.
+#[allow(missing_docs)]
+#[derive(Clone, Copy, Debug, MallocSizeOf, PartialEq, SpecifiedValueInfo, ToCss, ToShmem)]
+pub enum NumberOrPercentage {
+ Percentage(Percentage),
+ Number(Number),
+}
+
+impl NumberOrPercentage {
+ fn parse_with_clamping_mode<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ type_: AllowedNumericType,
+ ) -> Result<Self, ParseError<'i>> {
+ if let Ok(per) =
+ input.try_parse(|i| Percentage::parse_with_clamping_mode(context, i, type_))
+ {
+ return Ok(NumberOrPercentage::Percentage(per));
+ }
+
+ parse_number_with_clamping_mode(context, input, type_).map(NumberOrPercentage::Number)
+ }
+
+ /// Parse a non-negative number or percentage.
+ pub fn parse_non_negative<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ Self::parse_with_clamping_mode(context, input, AllowedNumericType::NonNegative)
+ }
+
+ /// Convert the number or the percentage to a number.
+ pub fn to_percentage(self) -> Percentage {
+ match self {
+ Self::Percentage(p) => p,
+ Self::Number(n) => n.to_percentage(),
+ }
+ }
+
+ /// Convert the number or the percentage to a number.
+ pub fn to_number(self) -> Number {
+ match self {
+ Self::Percentage(p) => p.to_number(),
+ Self::Number(n) => n,
+ }
+ }
+}
+
+impl Parse for NumberOrPercentage {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ Self::parse_with_clamping_mode(context, input, AllowedNumericType::All)
+ }
+}
+
+/// A non-negative <number> | <percentage>.
+pub type NonNegativeNumberOrPercentage = NonNegative<NumberOrPercentage>;
+
+impl NonNegativeNumberOrPercentage {
+ /// Returns the `100%` value.
+ #[inline]
+ pub fn hundred_percent() -> Self {
+ NonNegative(NumberOrPercentage::Percentage(Percentage::hundred()))
+ }
+}
+
+impl Parse for NonNegativeNumberOrPercentage {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ Ok(NonNegative(NumberOrPercentage::parse_non_negative(
+ context, input,
+ )?))
+ }
+}
+
+/// The value of Opacity is <alpha-value>, which is "<number> | <percentage>".
+/// However, we serialize the specified value as number, so it's ok to store
+/// the Opacity as Number.
+#[derive(
+ Clone, Copy, Debug, MallocSizeOf, PartialEq, PartialOrd, SpecifiedValueInfo, ToCss, ToShmem,
+)]
+pub struct Opacity(Number);
+
+impl Parse for Opacity {
+ /// Opacity accepts <number> | <percentage>, so we parse it as NumberOrPercentage,
+ /// and then convert into an Number if it's a Percentage.
+ /// https://drafts.csswg.org/cssom/#serializing-css-values
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ let number = NumberOrPercentage::parse(context, input)?.to_number();
+ Ok(Opacity(number))
+ }
+}
+
+impl ToComputedValue for Opacity {
+ type ComputedValue = CSSFloat;
+
+ #[inline]
+ fn to_computed_value(&self, context: &Context) -> CSSFloat {
+ let value = self.0.to_computed_value(context);
+ if context.for_smil_animation {
+ // SMIL expects to be able to interpolate between out-of-range
+ // opacity values.
+ value
+ } else {
+ value.min(1.0).max(0.0)
+ }
+ }
+
+ #[inline]
+ fn from_computed_value(computed: &CSSFloat) -> Self {
+ Opacity(Number::from_computed_value(computed))
+ }
+}
+
+/// A specified `<integer>`, optionally coming from a `calc()` expression.
+///
+/// <https://drafts.csswg.org/css-values/#integers>
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, PartialEq, PartialOrd, ToShmem)]
+pub struct Integer {
+ value: CSSInteger,
+ was_calc: bool,
+}
+
+impl Zero for Integer {
+ #[inline]
+ fn zero() -> Self {
+ Self::new(0)
+ }
+
+ #[inline]
+ fn is_zero(&self) -> bool {
+ self.value() == 0
+ }
+}
+
+impl One for Integer {
+ #[inline]
+ fn one() -> Self {
+ Self::new(1)
+ }
+
+ #[inline]
+ fn is_one(&self) -> bool {
+ self.value() == 1
+ }
+}
+
+impl PartialEq<i32> for Integer {
+ fn eq(&self, value: &i32) -> bool {
+ self.value() == *value
+ }
+}
+
+impl Integer {
+ /// Trivially constructs a new `Integer` value.
+ pub fn new(val: CSSInteger) -> Self {
+ Integer {
+ value: val,
+ was_calc: false,
+ }
+ }
+
+ /// Returns the integer value associated with this value.
+ pub fn value(&self) -> CSSInteger {
+ self.value
+ }
+
+ /// Trivially constructs a new integer value from a `calc()` expression.
+ fn from_calc(val: CSSInteger) -> Self {
+ Integer {
+ value: val,
+ was_calc: true,
+ }
+ }
+}
+
+impl Parse for Integer {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ let location = input.current_source_location();
+ match *input.next()? {
+ Token::Number {
+ int_value: Some(v), ..
+ } => Ok(Integer::new(v)),
+ Token::Function(ref name) => {
+ let function = CalcNode::math_function(context, name, location)?;
+ let result = CalcNode::parse_integer(context, input, function)?;
+ Ok(Integer::from_calc(result))
+ },
+ ref t => Err(location.new_unexpected_token_error(t.clone())),
+ }
+ }
+}
+
+impl Integer {
+ /// Parse an integer value which is at least `min`.
+ pub fn parse_with_minimum<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ min: i32,
+ ) -> Result<Integer, ParseError<'i>> {
+ let value = Integer::parse(context, input)?;
+ // FIXME(emilio): The spec asks us to avoid rejecting it at parse
+ // time except until computed value time.
+ //
+ // It's not totally clear it's worth it though, and no other browser
+ // does this.
+ if value.value() < min {
+ return Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError));
+ }
+ Ok(value)
+ }
+
+ /// Parse a non-negative integer.
+ pub fn parse_non_negative<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Integer, ParseError<'i>> {
+ Integer::parse_with_minimum(context, input, 0)
+ }
+
+ /// Parse a positive integer (>= 1).
+ pub fn parse_positive<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Integer, ParseError<'i>> {
+ Integer::parse_with_minimum(context, input, 1)
+ }
+}
+
+impl ToComputedValue for Integer {
+ type ComputedValue = i32;
+
+ #[inline]
+ fn to_computed_value(&self, _: &Context) -> i32 {
+ self.value
+ }
+
+ #[inline]
+ fn from_computed_value(computed: &i32) -> Self {
+ Integer::new(*computed)
+ }
+}
+
+impl ToCss for Integer {
+ fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
+ where
+ W: Write,
+ {
+ if self.was_calc {
+ dest.write_str("calc(")?;
+ }
+ self.value.to_css(dest)?;
+ if self.was_calc {
+ dest.write_char(')')?;
+ }
+ Ok(())
+ }
+}
+
+impl SpecifiedValueInfo for Integer {}
+
+/// A wrapper of Integer, with value >= 1.
+pub type PositiveInteger = GreaterThanOrEqualToOne<Integer>;
+
+impl Parse for PositiveInteger {
+ #[inline]
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ Integer::parse_positive(context, input).map(GreaterThanOrEqualToOne)
+ }
+}
+
+/// The specified value of a grid `<track-breadth>`
+pub type TrackBreadth = GenericTrackBreadth<LengthPercentage>;
+
+/// The specified value of a grid `<track-size>`
+pub type TrackSize = GenericTrackSize<LengthPercentage>;
+
+/// The specified value of a grid `<track-size>+`
+pub type ImplicitGridTracks = GenericImplicitGridTracks<TrackSize>;
+
+/// The specified value of a grid `<track-list>`
+/// (could also be `<auto-track-list>` or `<explicit-track-list>`)
+pub type TrackList = GenericTrackList<LengthPercentage, Integer>;
+
+/// The specified value of a `<grid-line>`.
+pub type GridLine = GenericGridLine<Integer>;
+
+/// `<grid-template-rows> | <grid-template-columns>`
+pub type GridTemplateComponent = GenericGridTemplateComponent<LengthPercentage, Integer>;
+
+/// rect(...)
+pub type ClipRect = generics::GenericClipRect<LengthOrAuto>;
+
+impl Parse for ClipRect {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ Self::parse_quirky(context, input, AllowQuirks::No)
+ }
+}
+
+impl ClipRect {
+ /// Parses a rect(<top>, <left>, <bottom>, <right>), allowing quirks.
+ fn parse_quirky<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ allow_quirks: AllowQuirks,
+ ) -> Result<Self, ParseError<'i>> {
+ input.expect_function_matching("rect")?;
+
+ fn parse_argument<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ allow_quirks: AllowQuirks,
+ ) -> Result<LengthOrAuto, ParseError<'i>> {
+ LengthOrAuto::parse_quirky(context, input, allow_quirks)
+ }
+
+ input.parse_nested_block(|input| {
+ let top = parse_argument(context, input, allow_quirks)?;
+ let right;
+ let bottom;
+ let left;
+
+ if input.try_parse(|input| input.expect_comma()).is_ok() {
+ right = parse_argument(context, input, allow_quirks)?;
+ input.expect_comma()?;
+ bottom = parse_argument(context, input, allow_quirks)?;
+ input.expect_comma()?;
+ left = parse_argument(context, input, allow_quirks)?;
+ } else {
+ right = parse_argument(context, input, allow_quirks)?;
+ bottom = parse_argument(context, input, allow_quirks)?;
+ left = parse_argument(context, input, allow_quirks)?;
+ }
+
+ Ok(ClipRect {
+ top,
+ right,
+ bottom,
+ left,
+ })
+ })
+ }
+}
+
+/// rect(...) | auto
+pub type ClipRectOrAuto = generics::GenericClipRectOrAuto<ClipRect>;
+
+impl ClipRectOrAuto {
+ /// Parses a ClipRect or Auto, allowing quirks.
+ pub fn parse_quirky<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ allow_quirks: AllowQuirks,
+ ) -> Result<Self, ParseError<'i>> {
+ if let Ok(v) = input.try_parse(|i| ClipRect::parse_quirky(context, i, allow_quirks)) {
+ return Ok(generics::GenericClipRectOrAuto::Rect(v));
+ }
+ input.expect_ident_matching("auto")?;
+ Ok(generics::GenericClipRectOrAuto::Auto)
+ }
+}
+
+/// Whether quirks are allowed in this context.
+#[derive(Clone, Copy, PartialEq)]
+pub enum AllowQuirks {
+ /// Quirks are not allowed.
+ No,
+ /// Quirks are allowed, in quirks mode.
+ Yes,
+ /// Quirks are always allowed, used for SVG lengths.
+ Always,
+}
+
+impl AllowQuirks {
+ /// Returns `true` if quirks are allowed in this context.
+ pub fn allowed(self, quirks_mode: QuirksMode) -> bool {
+ match self {
+ AllowQuirks::Always => true,
+ AllowQuirks::No => false,
+ AllowQuirks::Yes => quirks_mode == QuirksMode::Quirks,
+ }
+ }
+}
+
+/// An attr(...) rule
+///
+/// `[namespace? `|`]? ident`
+#[derive(
+ Clone,
+ Debug,
+ Eq,
+ MallocSizeOf,
+ PartialEq,
+ SpecifiedValueInfo,
+ ToComputedValue,
+ ToResolvedValue,
+ ToShmem,
+)]
+#[css(function)]
+#[repr(C)]
+pub struct Attr {
+ /// Optional namespace prefix.
+ pub namespace_prefix: Prefix,
+ /// Optional namespace URL.
+ pub namespace_url: Namespace,
+ /// Attribute name
+ pub attribute: Atom,
+}
+
+impl Parse for Attr {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Attr, ParseError<'i>> {
+ input.expect_function_matching("attr")?;
+ input.parse_nested_block(|i| Attr::parse_function(context, i))
+ }
+}
+
+/// Get the Namespace for a given prefix from the namespace map.
+fn get_namespace_for_prefix(prefix: &Prefix, context: &ParserContext) -> Option<Namespace> {
+ context.namespaces.prefixes.get(prefix).cloned()
+}
+
+impl Attr {
+ /// Parse contents of attr() assuming we have already parsed `attr` and are
+ /// within a parse_nested_block()
+ pub fn parse_function<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Attr, ParseError<'i>> {
+ // Syntax is `[namespace? `|`]? ident`
+ // no spaces allowed
+ let first = input.try_parse(|i| i.expect_ident_cloned()).ok();
+ if let Ok(token) = input.try_parse(|i| i.next_including_whitespace().map(|t| t.clone())) {
+ match token {
+ Token::Delim('|') => {
+ let location = input.current_source_location();
+ // must be followed by an ident
+ let second_token = match *input.next_including_whitespace()? {
+ Token::Ident(ref second) => second,
+ ref t => return Err(location.new_unexpected_token_error(t.clone())),
+ };
+
+ let (namespace_prefix, namespace_url) = if let Some(ns) = first {
+ let prefix = Prefix::from(ns.as_ref());
+ let ns = match get_namespace_for_prefix(&prefix, context) {
+ Some(ns) => ns,
+ None => {
+ return Err(location
+ .new_custom_error(StyleParseErrorKind::UnspecifiedError));
+ },
+ };
+ (prefix, ns)
+ } else {
+ (Prefix::default(), Namespace::default())
+ };
+ return Ok(Attr {
+ namespace_prefix,
+ namespace_url,
+ attribute: Atom::from(second_token.as_ref()),
+ });
+ },
+ // In the case of attr(foobar ) we don't want to error out
+ // because of the trailing whitespace.
+ Token::WhiteSpace(..) => {},
+ ref t => return Err(input.new_unexpected_token_error(t.clone())),
+ }
+ }
+
+ if let Some(first) = first {
+ Ok(Attr {
+ namespace_prefix: Prefix::default(),
+ namespace_url: Namespace::default(),
+ attribute: Atom::from(first.as_ref()),
+ })
+ } else {
+ Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError))
+ }
+ }
+}
+
+impl ToCss for Attr {
+ fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
+ where
+ W: Write,
+ {
+ dest.write_str("attr(")?;
+ if !self.namespace_prefix.is_empty() {
+ serialize_atom_identifier(&self.namespace_prefix, dest)?;
+ dest.write_char('|')?;
+ }
+ serialize_atom_identifier(&self.attribute, dest)?;
+ dest.write_char(')')
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 15:11:09 +0000