Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 487 insertions, 0 deletions

diff --git a/servo/components/style/values/specified/transform.rs b/servo/components/style/values/specified/transform.rs
new file mode 100644
index 0000000000..c10b79a089
--- /dev/null
+++ b/servo/components/style/values/specified/transform.rs
@@ -0,0 +1,487 @@
+/* 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 CSS values that are related to transformations.
+
+use crate::parser::{Parse, ParserContext};
+use crate::values::computed::{Context, LengthPercentage as ComputedLengthPercentage};
+use crate::values::computed::{Percentage as ComputedPercentage, ToComputedValue};
+use crate::values::generics::transform as generic;
+use crate::values::generics::transform::{Matrix, Matrix3D};
+use crate::values::specified::position::{
+    HorizontalPositionKeyword, Side, VerticalPositionKeyword,
+};
+use crate::values::specified::{
+    self, Angle, Integer, Length, LengthPercentage, Number, NumberOrPercentage,
+};
+use crate::Zero;
+use cssparser::Parser;
+use style_traits::{ParseError, StyleParseErrorKind};
+
+pub use crate::values::generics::transform::TransformStyle;
+
+/// A single operation in a specified CSS `transform`
+pub type TransformOperation =
+    generic::TransformOperation<Angle, Number, Length, Integer, LengthPercentage>;
+
+/// A specified CSS `transform`
+pub type Transform = generic::Transform<TransformOperation>;
+
+/// The specified value of a CSS `<transform-origin>`
+pub type TransformOrigin = generic::TransformOrigin<
+    OriginComponent<HorizontalPositionKeyword>,
+    OriginComponent<VerticalPositionKeyword>,
+    Length,
+>;
+
+impl TransformOrigin {
+    /// Returns the initial specified value for `transform-origin`.
+    #[inline]
+    pub fn initial_value() -> Self {
+        Self::new(
+            OriginComponent::Length(LengthPercentage::Percentage(ComputedPercentage(0.5))),
+            OriginComponent::Length(LengthPercentage::Percentage(ComputedPercentage(0.5))),
+            Length::zero(),
+        )
+    }
+
+    /// Returns the `0 0` value.
+    pub fn zero_zero() -> Self {
+        Self::new(
+            OriginComponent::Length(LengthPercentage::zero()),
+            OriginComponent::Length(LengthPercentage::zero()),
+            Length::zero(),
+        )
+    }
+}
+
+impl Transform {
+    /// Internal parse function for deciding if we wish to accept prefixed values or not
+    ///
+    /// `transform` allows unitless zero angles as an exception, see:
+    /// https://github.com/w3c/csswg-drafts/issues/1162
+    fn parse_internal<'i, 't>(
+        context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
+        use style_traits::{Separator, Space};
+
+        if input
+            .try_parse(|input| input.expect_ident_matching("none"))
+            .is_ok()
+        {
+            return Ok(generic::Transform::none());
+        }
+
+        Ok(generic::Transform(
+            Space::parse(input, |input| {
+                let function = input.expect_function()?.clone();
+                input.parse_nested_block(|input| {
+                    let location = input.current_source_location();
+                    let result = match_ignore_ascii_case! { &function,
+                        "matrix" => {
+                            let a = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let b = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let c = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let d = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            // Standard matrix parsing.
+                            let e = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let f = Number::parse(context, input)?;
+                            Ok(generic::TransformOperation::Matrix(Matrix { a, b, c, d, e, f }))
+                        },
+                        "matrix3d" => {
+                            let m11 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m12 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m13 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m14 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m21 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m22 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m23 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m24 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m31 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m32 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m33 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m34 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            // Standard matrix3d parsing.
+                            let m41 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m42 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m43 = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let m44 = Number::parse(context, input)?;
+                            Ok(generic::TransformOperation::Matrix3D(Matrix3D {
+                                m11, m12, m13, m14,
+                                m21, m22, m23, m24,
+                                m31, m32, m33, m34,
+                                m41, m42, m43, m44,
+                            }))
+                        },
+                        "translate" => {
+                            let sx = specified::LengthPercentage::parse(context, input)?;
+                            if input.try_parse(|input| input.expect_comma()).is_ok() {
+                                let sy = specified::LengthPercentage::parse(context, input)?;
+                                Ok(generic::TransformOperation::Translate(sx, sy))
+                            } else {
+                                Ok(generic::TransformOperation::Translate(sx, Zero::zero()))
+                            }
+                        },
+                        "translatex" => {
+                            let tx = specified::LengthPercentage::parse(context, input)?;
+                            Ok(generic::TransformOperation::TranslateX(tx))
+                        },
+                        "translatey" => {
+                            let ty = specified::LengthPercentage::parse(context, input)?;
+                            Ok(generic::TransformOperation::TranslateY(ty))
+                        },
+                        "translatez" => {
+                            let tz = specified::Length::parse(context, input)?;
+                            Ok(generic::TransformOperation::TranslateZ(tz))
+                        },
+                        "translate3d" => {
+                            let tx = specified::LengthPercentage::parse(context, input)?;
+                            input.expect_comma()?;
+                            let ty = specified::LengthPercentage::parse(context, input)?;
+                            input.expect_comma()?;
+                            let tz = specified::Length::parse(context, input)?;
+                            Ok(generic::TransformOperation::Translate3D(tx, ty, tz))
+                        },
+                        "scale" => {
+                            let sx = NumberOrPercentage::parse(context, input)?.to_number();
+                            if input.try_parse(|input| input.expect_comma()).is_ok() {
+                                let sy = NumberOrPercentage::parse(context, input)?.to_number();
+                                Ok(generic::TransformOperation::Scale(sx, sy))
+                            } else {
+                                Ok(generic::TransformOperation::Scale(sx, sx))
+                            }
+                        },
+                        "scalex" => {
+                            let sx = NumberOrPercentage::parse(context, input)?.to_number();
+                            Ok(generic::TransformOperation::ScaleX(sx))
+                        },
+                        "scaley" => {
+                            let sy = NumberOrPercentage::parse(context, input)?.to_number();
+                            Ok(generic::TransformOperation::ScaleY(sy))
+                        },
+                        "scalez" => {
+                            let sz = NumberOrPercentage::parse(context, input)?.to_number();
+                            Ok(generic::TransformOperation::ScaleZ(sz))
+                        },
+                        "scale3d" => {
+                            let sx = NumberOrPercentage::parse(context, input)?.to_number();
+                            input.expect_comma()?;
+                            let sy = NumberOrPercentage::parse(context, input)?.to_number();
+                            input.expect_comma()?;
+                            let sz = NumberOrPercentage::parse(context, input)?.to_number();
+                            Ok(generic::TransformOperation::Scale3D(sx, sy, sz))
+                        },
+                        "rotate" => {
+                            let theta = specified::Angle::parse_with_unitless(context, input)?;
+                            Ok(generic::TransformOperation::Rotate(theta))
+                        },
+                        "rotatex" => {
+                            let theta = specified::Angle::parse_with_unitless(context, input)?;
+                            Ok(generic::TransformOperation::RotateX(theta))
+                        },
+                        "rotatey" => {
+                            let theta = specified::Angle::parse_with_unitless(context, input)?;
+                            Ok(generic::TransformOperation::RotateY(theta))
+                        },
+                        "rotatez" => {
+                            let theta = specified::Angle::parse_with_unitless(context, input)?;
+                            Ok(generic::TransformOperation::RotateZ(theta))
+                        },
+                        "rotate3d" => {
+                            let ax = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let ay = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let az = Number::parse(context, input)?;
+                            input.expect_comma()?;
+                            let theta = specified::Angle::parse_with_unitless(context, input)?;
+                            // TODO(gw): Check that the axis can be normalized.
+                            Ok(generic::TransformOperation::Rotate3D(ax, ay, az, theta))
+                        },
+                        "skew" => {
+                            let ax = specified::Angle::parse_with_unitless(context, input)?;
+                            if input.try_parse(|input| input.expect_comma()).is_ok() {
+                                let ay = specified::Angle::parse_with_unitless(context, input)?;
+                                Ok(generic::TransformOperation::Skew(ax, ay))
+                            } else {
+                                Ok(generic::TransformOperation::Skew(ax, Zero::zero()))
+                            }
+                        },
+                        "skewx" => {
+                            let theta = specified::Angle::parse_with_unitless(context, input)?;
+                            Ok(generic::TransformOperation::SkewX(theta))
+                        },
+                        "skewy" => {
+                            let theta = specified::Angle::parse_with_unitless(context, input)?;
+                            Ok(generic::TransformOperation::SkewY(theta))
+                        },
+                        "perspective" => {
+                            let p = match input.try_parse(|input| specified::Length::parse_non_negative(context, input)) {
+                                Ok(p) => generic::PerspectiveFunction::Length(p),
+                                Err(..) => {
+                                    input.expect_ident_matching("none")?;
+                                    generic::PerspectiveFunction::None
+                                }
+                            };
+                            Ok(generic::TransformOperation::Perspective(p))
+                        },
+                        _ => Err(()),
+                    };
+                    result.map_err(|()| {
+                        location.new_custom_error(StyleParseErrorKind::UnexpectedFunction(
+                            function.clone(),
+                        ))
+                    })
+                })
+            })?
+            .into(),
+        ))
+    }
+}
+
+impl Parse for Transform {
+    fn parse<'i, 't>(
+        context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
+        Transform::parse_internal(context, input)
+    }
+}
+
+/// The specified value of a component of a CSS `<transform-origin>`.
+#[derive(Clone, Debug, MallocSizeOf, Parse, PartialEq, SpecifiedValueInfo, ToCss, ToShmem)]
+pub enum OriginComponent<S> {
+    /// `center`
+    Center,
+    /// `<length-percentage>`
+    Length(LengthPercentage),
+    /// `<side>`
+    Side(S),
+}
+
+impl Parse for TransformOrigin {
+    fn parse<'i, 't>(
+        context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
+        let parse_depth = |input: &mut Parser| {
+            input
+                .try_parse(|i| Length::parse(context, i))
+                .unwrap_or(Length::zero())
+        };
+        match input.try_parse(|i| OriginComponent::parse(context, i)) {
+            Ok(x_origin @ OriginComponent::Center) => {
+                if let Ok(y_origin) = input.try_parse(|i| OriginComponent::parse(context, i)) {
+                    let depth = parse_depth(input);
+                    return Ok(Self::new(x_origin, y_origin, depth));
+                }
+                let y_origin = OriginComponent::Center;
+                if let Ok(x_keyword) = input.try_parse(HorizontalPositionKeyword::parse) {
+                    let x_origin = OriginComponent::Side(x_keyword);
+                    let depth = parse_depth(input);
+                    return Ok(Self::new(x_origin, y_origin, depth));
+                }
+                let depth = Length::from_px(0.);
+                return Ok(Self::new(x_origin, y_origin, depth));
+            },
+            Ok(x_origin) => {
+                if let Ok(y_origin) = input.try_parse(|i| OriginComponent::parse(context, i)) {
+                    let depth = parse_depth(input);
+                    return Ok(Self::new(x_origin, y_origin, depth));
+                }
+                let y_origin = OriginComponent::Center;
+                let depth = Length::from_px(0.);
+                return Ok(Self::new(x_origin, y_origin, depth));
+            },
+            Err(_) => {},
+        }
+        let y_keyword = VerticalPositionKeyword::parse(input)?;
+        let y_origin = OriginComponent::Side(y_keyword);
+        if let Ok(x_keyword) = input.try_parse(HorizontalPositionKeyword::parse) {
+            let x_origin = OriginComponent::Side(x_keyword);
+            let depth = parse_depth(input);
+            return Ok(Self::new(x_origin, y_origin, depth));
+        }
+        if input
+            .try_parse(|i| i.expect_ident_matching("center"))
+            .is_ok()
+        {
+            let x_origin = OriginComponent::Center;
+            let depth = parse_depth(input);
+            return Ok(Self::new(x_origin, y_origin, depth));
+        }
+        let x_origin = OriginComponent::Center;
+        let depth = Length::from_px(0.);
+        Ok(Self::new(x_origin, y_origin, depth))
+    }
+}
+
+impl<S> ToComputedValue for OriginComponent<S>
+where
+    S: Side,
+{
+    type ComputedValue = ComputedLengthPercentage;
+
+    fn to_computed_value(&self, context: &Context) -> Self::ComputedValue {
+        match *self {
+            OriginComponent::Center => {
+                ComputedLengthPercentage::new_percent(ComputedPercentage(0.5))
+            },
+            OriginComponent::Length(ref length) => length.to_computed_value(context),
+            OriginComponent::Side(ref keyword) => {
+                let p = ComputedPercentage(if keyword.is_start() { 0. } else { 1. });
+                ComputedLengthPercentage::new_percent(p)
+            },
+        }
+    }
+
+    fn from_computed_value(computed: &Self::ComputedValue) -> Self {
+        OriginComponent::Length(ToComputedValue::from_computed_value(computed))
+    }
+}
+
+impl<S> OriginComponent<S> {
+    /// `0%`
+    pub fn zero() -> Self {
+        OriginComponent::Length(LengthPercentage::Percentage(ComputedPercentage::zero()))
+    }
+}
+
+/// A specified CSS `rotate`
+pub type Rotate = generic::Rotate<Number, Angle>;
+
+impl Parse for Rotate {
+    fn parse<'i, 't>(
+        context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
+        if input.try_parse(|i| i.expect_ident_matching("none")).is_ok() {
+            return Ok(generic::Rotate::None);
+        }
+
+        // Parse <angle> or [ x | y | z | <number>{3} ] && <angle>.
+        //
+        // The rotate axis and angle could be in any order, so we parse angle twice to cover
+        // two cases. i.e. `<number>{3} <angle>` or `<angle> <number>{3}`
+        let angle = input
+            .try_parse(|i| specified::Angle::parse(context, i))
+            .ok();
+        let axis = input
+            .try_parse(|i| {
+                Ok(try_match_ident_ignore_ascii_case! { i,
+                    "x" => (Number::new(1.), Number::new(0.), Number::new(0.)),
+                    "y" => (Number::new(0.), Number::new(1.), Number::new(0.)),
+                    "z" => (Number::new(0.), Number::new(0.), Number::new(1.)),
+                })
+            })
+            .or_else(|_: ParseError| -> Result<_, ParseError> {
+                input.try_parse(|i| {
+                    Ok((
+                        Number::parse(context, i)?,
+                        Number::parse(context, i)?,
+                        Number::parse(context, i)?,
+                    ))
+                })
+            })
+            .ok();
+        let angle = match angle {
+            Some(a) => a,
+            None => specified::Angle::parse(context, input)?,
+        };
+
+        Ok(match axis {
+            Some((x, y, z)) => generic::Rotate::Rotate3D(x, y, z, angle),
+            None => generic::Rotate::Rotate(angle),
+        })
+    }
+}
+
+/// A specified CSS `translate`
+pub type Translate = generic::Translate<LengthPercentage, Length>;
+
+impl Parse for Translate {
+    fn parse<'i, 't>(
+        context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
+        if input.try_parse(|i| i.expect_ident_matching("none")).is_ok() {
+            return Ok(generic::Translate::None);
+        }
+
+        let tx = specified::LengthPercentage::parse(context, input)?;
+        if let Ok(ty) = input.try_parse(|i| specified::LengthPercentage::parse(context, i)) {
+            if let Ok(tz) = input.try_parse(|i| specified::Length::parse(context, i)) {
+                // 'translate: <length-percentage> <length-percentage> <length>'
+                return Ok(generic::Translate::Translate(tx, ty, tz));
+            }
+
+            // translate: <length-percentage> <length-percentage>'
+            return Ok(generic::Translate::Translate(
+                tx,
+                ty,
+                specified::Length::zero(),
+            ));
+        }
+
+        // 'translate: <length-percentage> '
+        Ok(generic::Translate::Translate(
+            tx,
+            specified::LengthPercentage::zero(),
+            specified::Length::zero(),
+        ))
+    }
+}
+
+/// A specified CSS `scale`
+pub type Scale = generic::Scale<Number>;
+
+impl Parse for Scale {
+    /// Scale accepts <number> | <percentage>, so we parse it as NumberOrPercentage,
+    /// and then convert into an Number if it's a Percentage.
+    /// https://github.com/w3c/csswg-drafts/pull/4396
+    fn parse<'i, 't>(
+        context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
+        if input.try_parse(|i| i.expect_ident_matching("none")).is_ok() {
+            return Ok(generic::Scale::None);
+        }
+
+        let sx = NumberOrPercentage::parse(context, input)?.to_number();
+        if let Ok(sy) = input.try_parse(|i| NumberOrPercentage::parse(context, i)) {
+            let sy = sy.to_number();
+            if let Ok(sz) = input.try_parse(|i| NumberOrPercentage::parse(context, i)) {
+                // 'scale: <number> <number> <number>'
+                return Ok(generic::Scale::Scale(sx, sy, sz.to_number()));
+            }
+
+            // 'scale: <number> <number>'
+            return Ok(generic::Scale::Scale(sx, sy, Number::new(1.0)));
+        }
+
+        // 'scale: <number>'
+        Ok(generic::Scale::Scale(sx, sx, Number::new(1.0)))
+    }
+}