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-rw-r--r--servo/components/style/values/specified/svg.rs404
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diff --git a/servo/components/style/values/specified/svg.rs b/servo/components/style/values/specified/svg.rs
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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
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+//! Specified types for SVG properties.
+
+use crate::parser::{Parse, ParserContext};
+use crate::values::generics::svg as generic;
+use crate::values::specified::color::Color;
+use crate::values::specified::url::SpecifiedUrl;
+use crate::values::specified::AllowQuirks;
+use crate::values::specified::LengthPercentage;
+use crate::values::specified::SVGPathData;
+use crate::values::specified::{NonNegativeLengthPercentage, Opacity};
+use crate::values::CustomIdent;
+use cssparser::{Parser, Token};
+use std::fmt::{self, Write};
+use style_traits::{CommaWithSpace, CssWriter, ParseError, Separator};
+use style_traits::{StyleParseErrorKind, ToCss};
+
+/// Specified SVG Paint value
+pub type SVGPaint = generic::GenericSVGPaint<Color, SpecifiedUrl>;
+
+/// <length> | <percentage> | <number> | context-value
+pub type SVGLength = generic::GenericSVGLength<LengthPercentage>;
+
+/// A non-negative version of SVGLength.
+pub type SVGWidth = generic::GenericSVGLength<NonNegativeLengthPercentage>;
+
+/// [ <length> | <percentage> | <number> ]# | context-value
+pub type SVGStrokeDashArray = generic::GenericSVGStrokeDashArray<NonNegativeLengthPercentage>;
+
+/// Whether the `context-value` value is enabled.
+#[cfg(feature = "gecko")]
+pub fn is_context_value_enabled() -> bool {
+ static_prefs::pref!("gfx.font_rendering.opentype_svg.enabled")
+}
+
+/// Whether the `context-value` value is enabled.
+#[cfg(not(feature = "gecko"))]
+pub fn is_context_value_enabled() -> bool {
+ false
+}
+
+macro_rules! parse_svg_length {
+ ($ty:ty, $lp:ty) => {
+ impl Parse for $ty {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ if let Ok(lp) =
+ input.try_parse(|i| <$lp>::parse_quirky(context, i, AllowQuirks::Always))
+ {
+ return Ok(generic::SVGLength::LengthPercentage(lp));
+ }
+
+ try_match_ident_ignore_ascii_case! { input,
+ "context-value" if is_context_value_enabled() => {
+ Ok(generic::SVGLength::ContextValue)
+ },
+ }
+ }
+ }
+ };
+}
+
+parse_svg_length!(SVGLength, LengthPercentage);
+parse_svg_length!(SVGWidth, NonNegativeLengthPercentage);
+
+impl Parse for SVGStrokeDashArray {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ if let Ok(values) = input.try_parse(|i| {
+ CommaWithSpace::parse(i, |i| {
+ NonNegativeLengthPercentage::parse_quirky(context, i, AllowQuirks::Always)
+ })
+ }) {
+ return Ok(generic::SVGStrokeDashArray::Values(values.into()));
+ }
+
+ try_match_ident_ignore_ascii_case! { input,
+ "context-value" if is_context_value_enabled() => {
+ Ok(generic::SVGStrokeDashArray::ContextValue)
+ },
+ "none" => Ok(generic::SVGStrokeDashArray::Values(Default::default())),
+ }
+ }
+}
+
+/// <opacity-value> | context-fill-opacity | context-stroke-opacity
+pub type SVGOpacity = generic::SVGOpacity<Opacity>;
+
+/// The specified value for a single CSS paint-order property.
+#[repr(u8)]
+#[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd, ToCss)]
+pub enum PaintOrder {
+ /// `normal` variant
+ Normal = 0,
+ /// `fill` variant
+ Fill = 1,
+ /// `stroke` variant
+ Stroke = 2,
+ /// `markers` variant
+ Markers = 3,
+}
+
+/// Number of non-normal components
+pub const PAINT_ORDER_COUNT: u8 = 3;
+
+/// Number of bits for each component
+pub const PAINT_ORDER_SHIFT: u8 = 2;
+
+/// Mask with above bits set
+pub const PAINT_ORDER_MASK: u8 = 0b11;
+
+/// The specified value is tree `PaintOrder` values packed into the
+/// bitfields below, as a six-bit field, of 3 two-bit pairs
+///
+/// Each pair can be set to FILL, STROKE, or MARKERS
+/// Lowest significant bit pairs are highest priority.
+/// `normal` is the empty bitfield. The three pairs are
+/// never zero in any case other than `normal`.
+///
+/// Higher priority values, i.e. the values specified first,
+/// will be painted first (and may be covered by paintings of lower priority)
+#[derive(
+ Clone,
+ Copy,
+ Debug,
+ MallocSizeOf,
+ PartialEq,
+ SpecifiedValueInfo,
+ ToComputedValue,
+ ToResolvedValue,
+ ToShmem,
+)]
+#[repr(transparent)]
+pub struct SVGPaintOrder(pub u8);
+
+impl SVGPaintOrder {
+ /// Get default `paint-order` with `0`
+ pub fn normal() -> Self {
+ SVGPaintOrder(0)
+ }
+
+ /// Get variant of `paint-order`
+ pub fn order_at(&self, pos: u8) -> PaintOrder {
+ match (self.0 >> pos * PAINT_ORDER_SHIFT) & PAINT_ORDER_MASK {
+ 0 => PaintOrder::Normal,
+ 1 => PaintOrder::Fill,
+ 2 => PaintOrder::Stroke,
+ 3 => PaintOrder::Markers,
+ _ => unreachable!("this cannot happen"),
+ }
+ }
+}
+
+impl Parse for SVGPaintOrder {
+ fn parse<'i, 't>(
+ _context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<SVGPaintOrder, ParseError<'i>> {
+ if let Ok(()) = input.try_parse(|i| i.expect_ident_matching("normal")) {
+ return Ok(SVGPaintOrder::normal());
+ }
+
+ let mut value = 0;
+ // bitfield representing what we've seen so far
+ // bit 1 is fill, bit 2 is stroke, bit 3 is markers
+ let mut seen = 0;
+ let mut pos = 0;
+
+ loop {
+ let result: Result<_, ParseError> = input.try_parse(|input| {
+ try_match_ident_ignore_ascii_case! { input,
+ "fill" => Ok(PaintOrder::Fill),
+ "stroke" => Ok(PaintOrder::Stroke),
+ "markers" => Ok(PaintOrder::Markers),
+ }
+ });
+
+ match result {
+ Ok(val) => {
+ if (seen & (1 << val as u8)) != 0 {
+ // don't parse the same ident twice
+ return Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError));
+ }
+
+ value |= (val as u8) << (pos * PAINT_ORDER_SHIFT);
+ seen |= 1 << (val as u8);
+ pos += 1;
+ },
+ Err(_) => break,
+ }
+ }
+
+ if value == 0 {
+ // Couldn't find any keyword
+ return Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError));
+ }
+
+ // fill in rest
+ for i in pos..PAINT_ORDER_COUNT {
+ for paint in 1..(PAINT_ORDER_COUNT + 1) {
+ // if not seen, set bit at position, mark as seen
+ if (seen & (1 << paint)) == 0 {
+ seen |= 1 << paint;
+ value |= paint << (i * PAINT_ORDER_SHIFT);
+ break;
+ }
+ }
+ }
+
+ Ok(SVGPaintOrder(value))
+ }
+}
+
+impl ToCss for SVGPaintOrder {
+ fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
+ where
+ W: Write,
+ {
+ if self.0 == 0 {
+ return dest.write_str("normal");
+ }
+
+ let mut last_pos_to_serialize = 0;
+ for i in (1..PAINT_ORDER_COUNT).rev() {
+ let component = self.order_at(i);
+ let earlier_component = self.order_at(i - 1);
+ if component < earlier_component {
+ last_pos_to_serialize = i - 1;
+ break;
+ }
+ }
+
+ for pos in 0..last_pos_to_serialize + 1 {
+ if pos != 0 {
+ dest.write_char(' ')?
+ }
+ self.order_at(pos).to_css(dest)?;
+ }
+ Ok(())
+ }
+}
+
+/// The context properties we understand.
+#[derive(
+ Clone,
+ Copy,
+ Eq,
+ Debug,
+ Default,
+ MallocSizeOf,
+ PartialEq,
+ SpecifiedValueInfo,
+ ToComputedValue,
+ ToResolvedValue,
+ ToShmem,
+)]
+#[repr(C)]
+pub struct ContextPropertyBits(u8);
+bitflags! {
+ impl ContextPropertyBits: u8 {
+ /// `fill`
+ const FILL = 1 << 0;
+ /// `stroke`
+ const STROKE = 1 << 1;
+ /// `fill-opacity`
+ const FILL_OPACITY = 1 << 2;
+ /// `stroke-opacity`
+ const STROKE_OPACITY = 1 << 3;
+ }
+}
+
+/// Specified MozContextProperties value.
+/// Nonstandard (https://developer.mozilla.org/en-US/docs/Web/CSS/-moz-context-properties)
+#[derive(
+ Clone,
+ Debug,
+ Default,
+ MallocSizeOf,
+ PartialEq,
+ SpecifiedValueInfo,
+ ToComputedValue,
+ ToCss,
+ ToResolvedValue,
+ ToShmem,
+)]
+#[repr(C)]
+pub struct MozContextProperties {
+ #[css(iterable, if_empty = "none")]
+ #[ignore_malloc_size_of = "Arc"]
+ idents: crate::ArcSlice<CustomIdent>,
+ #[css(skip)]
+ bits: ContextPropertyBits,
+}
+
+impl Parse for MozContextProperties {
+ fn parse<'i, 't>(
+ _context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<MozContextProperties, ParseError<'i>> {
+ let mut values = vec![];
+ let mut bits = ContextPropertyBits::empty();
+ loop {
+ {
+ let location = input.current_source_location();
+ let ident = input.expect_ident()?;
+
+ if ident.eq_ignore_ascii_case("none") && values.is_empty() {
+ return Ok(Self::default());
+ }
+
+ let ident = CustomIdent::from_ident(location, ident, &["all", "none", "auto"])?;
+
+ if ident.0 == atom!("fill") {
+ bits.insert(ContextPropertyBits::FILL);
+ } else if ident.0 == atom!("stroke") {
+ bits.insert(ContextPropertyBits::STROKE);
+ } else if ident.0 == atom!("fill-opacity") {
+ bits.insert(ContextPropertyBits::FILL_OPACITY);
+ } else if ident.0 == atom!("stroke-opacity") {
+ bits.insert(ContextPropertyBits::STROKE_OPACITY);
+ }
+
+ values.push(ident);
+ }
+
+ let location = input.current_source_location();
+ match input.next() {
+ Ok(&Token::Comma) => continue,
+ Err(..) => break,
+ Ok(other) => return Err(location.new_unexpected_token_error(other.clone())),
+ }
+ }
+
+ if values.is_empty() {
+ return Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError));
+ }
+
+ Ok(MozContextProperties {
+ idents: crate::ArcSlice::from_iter(values.into_iter()),
+ bits,
+ })
+ }
+}
+
+/// The svg d property type.
+///
+/// https://svgwg.org/svg2-draft/paths.html#TheDProperty
+#[derive(
+ Animate,
+ Clone,
+ ComputeSquaredDistance,
+ Debug,
+ Deserialize,
+ MallocSizeOf,
+ PartialEq,
+ Serialize,
+ SpecifiedValueInfo,
+ ToAnimatedZero,
+ ToComputedValue,
+ ToCss,
+ ToResolvedValue,
+ ToShmem,
+)]
+#[repr(C, u8)]
+pub enum DProperty {
+ /// Path value for path(<string>) or just a <string>.
+ #[css(function)]
+ Path(SVGPathData),
+ /// None value.
+ #[animation(error)]
+ None,
+}
+
+impl DProperty {
+ /// return none.
+ #[inline]
+ pub fn none() -> Self {
+ DProperty::None
+ }
+}
+
+impl Parse for DProperty {
+ fn parse<'i, 't>(
+ context: &ParserContext,
+ input: &mut Parser<'i, 't>,
+ ) -> Result<Self, ParseError<'i>> {
+ // Parse none.
+ if input.try_parse(|i| i.expect_ident_matching("none")).is_ok() {
+ return Ok(DProperty::none());
+ }
+
+ // Parse possible functions.
+ input.expect_function_matching("path")?;
+ let path_data = input.parse_nested_block(|i| Parse::parse(context, i))?;
+ Ok(DProperty::Path(path_data))
+ }
+}