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Auto merge of #18072 - servo:we-are-leaving-babylon, r=emilio

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Move some code out of animated_properties

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bors-servo 2017-08-14 07:51:34 -05:00 • committed by GitHub
commit 4d22af6136
21 changed files with 598 additions and 496 deletions
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271
components/style/properties/helpers/animated_properties.mako.rs
View file

@ -7,7 +7,7 @@
<% from data import to_idl_name, SYSTEM_FONT_LONGHANDS %> <% from data import to_idl_name, SYSTEM_FONT_LONGHANDS %>
use app_units::Au; use app_units::Au;
use cssparser::{Parser, RGBA}; use cssparser::Parser;
use euclid::{Point2D, Size2D}; use euclid::{Point2D, Size2D};
#[cfg(feature = "gecko")] use gecko_bindings::bindings::RawServoAnimationValueMap; #[cfg(feature = "gecko")] use gecko_bindings::bindings::RawServoAnimationValueMap;
#[cfg(feature = "gecko")] use gecko_bindings::structs::RawGeckoGfxMatrix4x4; #[cfg(feature = "gecko")] use gecko_bindings::structs::RawGeckoGfxMatrix4x4;
@ -38,13 +38,14 @@ use super::ComputedValues;
use values::Auto; use values::Auto;
use values::{CSSFloat, CustomIdent, Either}; use values::{CSSFloat, CustomIdent, Either};
use values::animated::{ToAnimatedValue, ToAnimatedZero}; use values::animated::{ToAnimatedValue, ToAnimatedZero};
use values::animated::color::{Color as AnimatedColor, RGBA as AnimatedRGBA};
use values::animated::effects::BoxShadowList as AnimatedBoxShadowList; use values::animated::effects::BoxShadowList as AnimatedBoxShadowList;
use values::animated::effects::Filter as AnimatedFilter; use values::animated::effects::Filter as AnimatedFilter;
use values::animated::effects::FilterList as AnimatedFilterList; use values::animated::effects::FilterList as AnimatedFilterList;
use values::animated::effects::TextShadowList as AnimatedTextShadowList; use values::animated::effects::TextShadowList as AnimatedTextShadowList;
use values::computed::{Angle, LengthOrPercentageOrAuto, LengthOrPercentageOrNone}; use values::computed::{Angle, LengthOrPercentageOrAuto, LengthOrPercentageOrNone};
use values::computed::{BorderCornerRadius, ClipRect}; use values::computed::{BorderCornerRadius, ClipRect};
use values::computed::{CalcLengthOrPercentage, Color, Context, ComputedValueAsSpecified, ComputedUrl}; use values::computed::{CalcLengthOrPercentage, Context, ComputedValueAsSpecified, ComputedUrl};
use values::computed::{LengthOrPercentage, MaxLength, MozLength, Percentage, ToComputedValue}; use values::computed::{LengthOrPercentage, MaxLength, MozLength, Percentage, ToComputedValue};
use values::computed::{NonNegativeAu, NonNegativeNumber, PositiveIntegerOrAuto}; use values::computed::{NonNegativeAu, NonNegativeNumber, PositiveIntegerOrAuto};
use values::computed::length::{NonNegativeLengthOrAuto, NonNegativeLengthOrNormal}; use values::computed::length::{NonNegativeLengthOrAuto, NonNegativeLengthOrNormal};
@ -887,21 +888,6 @@ impl Animatable for Angle {
} }
} }
/// https://drafts.csswg.org/css-transitions/#animtype-percentage
impl Animatable for Percentage {
#[inline]
fn add_weighted(&self, other: &Self, self_portion: f64, other_portion: f64) -> Result<Self, ()> {
Ok(Percentage((self.0 as f64 * self_portion + other.0 as f64 * other_portion) as f32))
}
}
impl ToAnimatedZero for Percentage {
#[inline]
fn to_animated_zero(&self) -> Result<Self, ()> {
Ok(Percentage(0.))
}
}
/// https://drafts.csswg.org/css-transitions/#animtype-visibility /// https://drafts.csswg.org/css-transitions/#animtype-visibility
impl Animatable for Visibility { impl Animatable for Visibility {
#[inline] #[inline]
@ -952,11 +938,6 @@ impl<T: Animatable + Copy> Animatable for Point2D<T> {
} }
} }
impl ToAnimatedZero for BorderCornerRadius {
#[inline]
fn to_animated_zero(&self) -> Result<Self, ()> { Err(()) }
}
/// https://drafts.csswg.org/css-transitions/#animtype-length /// https://drafts.csswg.org/css-transitions/#animtype-length
impl Animatable for VerticalAlign { impl Animatable for VerticalAlign {
#[inline] #[inline]
@ -2455,253 +2436,11 @@ where
} }
} }
#[derive(Copy, Clone, Debug, PartialEq)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
/// Unlike RGBA, each component value may exceed the range [0.0, 1.0].
pub struct IntermediateRGBA {
/// The red component.
pub red: f32,
/// The green component.
pub green: f32,
/// The blue component.
pub blue: f32,
/// The alpha component.
pub alpha: f32,
}
impl IntermediateRGBA {
/// Returns a transparent color.
#[inline]
pub fn transparent() -> Self {
Self::new(0., 0., 0., 0.)
}
/// Returns a new color.
#[inline]
pub fn new(red: f32, green: f32, blue: f32, alpha: f32) -> Self {
IntermediateRGBA { red: red, green: green, blue: blue, alpha: alpha }
}
}
impl ToAnimatedValue for RGBA {
type AnimatedValue = IntermediateRGBA;
#[inline]
fn to_animated_value(self) -> Self::AnimatedValue {
IntermediateRGBA::new(
self.red_f32(),
self.green_f32(),
self.blue_f32(),
self.alpha_f32(),
)
}
#[inline]
fn from_animated_value(animated: Self::AnimatedValue) -> Self {
// RGBA::from_floats clamps each component values.
RGBA::from_floats(
animated.red,
animated.green,
animated.blue,
animated.alpha,
)
}
}
/// Unlike Animatable for RGBA we don't clamp any component values.
impl Animatable for IntermediateRGBA {
#[inline]
fn add_weighted(&self, other: &IntermediateRGBA, self_portion: f64, other_portion: f64)
-> Result<Self, ()> {
let mut alpha = self.alpha.add_weighted(&other.alpha, self_portion, other_portion)?;
if alpha <= 0. {
// Ideally we should return color value that only alpha component is
// 0, but this is what current gecko does.
Ok(IntermediateRGBA::transparent())
} else {
alpha = alpha.min(1.);
let red = (self.red * self.alpha).add_weighted(
&(other.red * other.alpha), self_portion, other_portion
)? * 1. / alpha;
let green = (self.green * self.alpha).add_weighted(
&(other.green * other.alpha), self_portion, other_portion
)? * 1. / alpha;
let blue = (self.blue * self.alpha).add_weighted(
&(other.blue * other.alpha), self_portion, other_portion
)? * 1. / alpha;
Ok(IntermediateRGBA::new(red, green, blue, alpha))
}
}
}
impl ComputeSquaredDistance for IntermediateRGBA {
#[inline]
fn compute_squared_distance(&self, other: &Self) -> Result<SquaredDistance, ()> {
let start = [ self.alpha, self.red * self.alpha, self.green * self.alpha, self.blue * self.alpha ];
let end = [ other.alpha, other.red * other.alpha, other.green * other.alpha, other.blue * other.alpha ];
start.iter().zip(&end).map(|(this, other)| this.compute_squared_distance(other)).sum()
}
}
impl ToAnimatedZero for IntermediateRGBA {
#[inline]
fn to_animated_zero(&self) -> Result<Self, ()> {
Ok(IntermediateRGBA::transparent())
}
}
#[derive(Copy, Clone, Debug, PartialEq)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
#[allow(missing_docs)]
pub struct IntermediateColor {
color: IntermediateRGBA,
foreground_ratio: f32,
}
impl IntermediateColor {
fn currentcolor() -> Self {
IntermediateColor {
color: IntermediateRGBA::transparent(),
foreground_ratio: 1.,
}
}
/// Returns a transparent intermediate color.
pub fn transparent() -> Self {
IntermediateColor {
color: IntermediateRGBA::transparent(),
foreground_ratio: 0.,
}
}
fn is_currentcolor(&self) -> bool {
self.foreground_ratio >= 1.
}
fn is_numeric(&self) -> bool {
self.foreground_ratio <= 0.
}
fn effective_intermediate_rgba(&self) -> IntermediateRGBA {
IntermediateRGBA {
alpha: self.color.alpha * (1. - self.foreground_ratio),
.. self.color
}
}
}
impl ToAnimatedValue for Color {
type AnimatedValue = IntermediateColor;
#[inline]
fn to_animated_value(self) -> Self::AnimatedValue {
IntermediateColor {
color: self.color.to_animated_value(),
foreground_ratio: self.foreground_ratio as f32 * (1. / 255.),
}
}
#[inline]
fn from_animated_value(animated: Self::AnimatedValue) -> Self {
Color {
color: RGBA::from_animated_value(animated.color),
foreground_ratio: (animated.foreground_ratio * 255.).round() as u8,
}
}
}
impl Animatable for IntermediateColor {
#[inline]
fn add_weighted(&self, other: &Self, self_portion: f64, other_portion: f64) -> Result<Self, ()> {
// Common cases are interpolating between two numeric colors,
// two currentcolors, and a numeric color and a currentcolor.
//
// Note: this algorithm assumes self_portion + other_portion
// equals to one, so it may be broken for additive operation.
// To properly support additive color interpolation, we would
// need two ratio fields in computed color types.
if self.foreground_ratio == other.foreground_ratio {
if self.is_currentcolor() {
Ok(IntermediateColor::currentcolor())
} else {
Ok(IntermediateColor {
color: self.color.add_weighted(&other.color, self_portion, other_portion)?,
foreground_ratio: self.foreground_ratio,
})
}
} else if self.is_currentcolor() && other.is_numeric() {
Ok(IntermediateColor {
color: other.color,
foreground_ratio: self_portion as f32,
})
} else if self.is_numeric() && other.is_currentcolor() {
Ok(IntermediateColor {
color: self.color,
foreground_ratio: other_portion as f32,
})
} else {
// For interpolating between two complex colors, we need to
// generate colors with effective alpha value.
let self_color = self.effective_intermediate_rgba();
let other_color = other.effective_intermediate_rgba();
let color = self_color.add_weighted(&other_color, self_portion, other_portion)?;
// Then we compute the final foreground ratio, and derive
// the final alpha value from the effective alpha value.
let foreground_ratio = self.foreground_ratio
.add_weighted(&other.foreground_ratio, self_portion, other_portion)?;
let alpha = color.alpha / (1. - foreground_ratio);
Ok(IntermediateColor {
color: IntermediateRGBA {
alpha: alpha,
.. color
},
foreground_ratio: foreground_ratio,
})
}
}
}
impl ComputeSquaredDistance for IntermediateColor {
#[inline]
fn compute_squared_distance(&self, other: &Self) -> Result<SquaredDistance, ()> {
// All comments in add_weighted also applies here.
if self.foreground_ratio == other.foreground_ratio {
if self.is_currentcolor() {
Ok(SquaredDistance::Value(0.))
} else {
self.color.compute_squared_distance(&other.color)
}
} else if self.is_currentcolor() && other.is_numeric() {
Ok(
IntermediateRGBA::transparent().compute_squared_distance(&other.color)? +
SquaredDistance::Value(1.),
)
} else if self.is_numeric() && other.is_currentcolor() {
Ok(
self.color.compute_squared_distance(&IntermediateRGBA::transparent())? +
SquaredDistance::Value(1.),
)
} else {
let self_color = self.effective_intermediate_rgba();
let other_color = other.effective_intermediate_rgba();
Ok(
self_color.compute_squared_distance(&other_color)? +
self.foreground_ratio.compute_squared_distance(&other.foreground_ratio)?,
)
}
}
}
impl ToAnimatedZero for IntermediateColor {
#[inline]
fn to_animated_zero(&self) -> Result<Self, ()> { Err(()) }
}
/// Animatable SVGPaint /// Animatable SVGPaint
pub type IntermediateSVGPaint = SVGPaint<IntermediateRGBA, ComputedUrl>; pub type IntermediateSVGPaint = SVGPaint<AnimatedRGBA, ComputedUrl>;
/// Animatable SVGPaintKind /// Animatable SVGPaintKind
pub type IntermediateSVGPaintKind = SVGPaintKind<IntermediateRGBA, ComputedUrl>; pub type IntermediateSVGPaintKind = SVGPaintKind<AnimatedRGBA, ComputedUrl>;
impl Animatable for IntermediateSVGPaint { impl Animatable for IntermediateSVGPaint {
#[inline] #[inline]

9
components/style/properties/longhand/background.mako.rs
View file

@ -6,14 +6,17 @@
<% data.new_style_struct("Background", inherited=False) %> <% data.new_style_struct("Background", inherited=False) %>
${helpers.predefined_type("background-color", "Color", ${helpers.predefined_type(
"background-color",
"Color",
"computed_value::T::transparent()", "computed_value::T::transparent()",
initial_specified_value="SpecifiedValue::transparent()", initial_specified_value="SpecifiedValue::transparent()",
spec="https://drafts.csswg.org/css-backgrounds/#background-color", spec="https://drafts.csswg.org/css-backgrounds/#background-color",
animation_value_type="IntermediateColor", animation_value_type="AnimatedColor",
ignored_when_colors_disabled=True, ignored_when_colors_disabled=True,
allow_quirks=True, allow_quirks=True,
flags="APPLIES_TO_FIRST_LETTER APPLIES_TO_FIRST_LINE APPLIES_TO_PLACEHOLDER")} flags="APPLIES_TO_FIRST_LETTER APPLIES_TO_FIRST_LINE APPLIES_TO_PLACEHOLDER",
)}
${helpers.predefined_type("background-image", "ImageLayer", ${helpers.predefined_type("background-image", "ImageLayer",
initial_value="Either::First(None_)", initial_value="Either::First(None_)",

20
components/style/properties/longhand/border.mako.rs
View file

@ -20,15 +20,17 @@
side_name = side[0] side_name = side[0]
is_logical = side[1] is_logical = side[1]
%> %>
${helpers.predefined_type("border-%s-color" % side_name, "Color", ${helpers.predefined_type(
"computed_value::T::currentcolor()", "border-%s-color" % side_name, "Color",
alias=maybe_moz_logical_alias(product, side, "-moz-border-%s-color"), "computed_value::T::currentcolor()",
spec=maybe_logical_spec(side, "color"), alias=maybe_moz_logical_alias(product, side, "-moz-border-%s-color"),
animation_value_type="IntermediateColor", spec=maybe_logical_spec(side, "color"),
logical=is_logical, animation_value_type="AnimatedColor",
allow_quirks=not is_logical, logical=is_logical,
flags="APPLIES_TO_FIRST_LETTER", allow_quirks=not is_logical,
ignored_when_colors_disabled=True)} flags="APPLIES_TO_FIRST_LETTER",
ignored_when_colors_disabled=True,
)}
${helpers.predefined_type("border-%s-style" % side_name, "BorderStyle", ${helpers.predefined_type("border-%s-style" % side_name, "BorderStyle",
"specified::BorderStyle::none", "specified::BorderStyle::none",

2
components/style/properties/longhand/color.mako.rs
View file

@ -9,7 +9,7 @@
<% from data import to_rust_ident %> <% from data import to_rust_ident %>
<%helpers:longhand name="color" need_clone="True" <%helpers:longhand name="color" need_clone="True"
animation_value_type="IntermediateRGBA" animation_value_type="AnimatedRGBA"
ignored_when_colors_disabled="True" ignored_when_colors_disabled="True"
flags="APPLIES_TO_FIRST_LETTER APPLIES_TO_FIRST_LINE APPLIES_TO_PLACEHOLDER" flags="APPLIES_TO_FIRST_LETTER APPLIES_TO_FIRST_LINE APPLIES_TO_PLACEHOLDER"
spec="https://drafts.csswg.org/css-color/#color"> spec="https://drafts.csswg.org/css-color/#color">

18
components/style/properties/longhand/column.mako.rs
View file

@ -48,12 +48,18 @@ ${helpers.predefined_type("column-rule-width",
extra_prefixes="moz")} extra_prefixes="moz")}
// https://drafts.csswg.org/css-multicol-1/#crc // https://drafts.csswg.org/css-multicol-1/#crc
${helpers.predefined_type("column-rule-color", "Color", ${helpers.predefined_type(
"computed_value::T::currentcolor()", "column-rule-color",
initial_specified_value="specified::Color::currentcolor()", "Color",
products="gecko", animation_value_type="IntermediateColor", extra_prefixes="moz", "computed_value::T::currentcolor()",
need_clone=True, ignored_when_colors_disabled=True, initial_specified_value="specified::Color::currentcolor()",
spec="https://drafts.csswg.org/css-multicol/#propdef-column-rule-color")} products="gecko",
animation_value_type="AnimatedColor",
extra_prefixes="moz",
need_clone=True,
ignored_when_colors_disabled=True,
spec="https://drafts.csswg.org/css-multicol/#propdef-column-rule-color",
)}
${helpers.single_keyword("column-span", "none all", ${helpers.single_keyword("column-span", "none all",
products="gecko", animation_value_type="discrete", products="gecko", animation_value_type="discrete",

39
components/style/properties/longhand/inherited_text.mako.rs
View file

@ -705,13 +705,17 @@ ${helpers.predefined_type(
% endif % endif
</%helpers:longhand> </%helpers:longhand>
${helpers.predefined_type("text-emphasis-color", "Color", ${helpers.predefined_type(
"computed_value::T::currentcolor()", "text-emphasis-color",
initial_specified_value="specified::Color::currentcolor()", "Color",
products="gecko", animation_value_type="IntermediateColor", "computed_value::T::currentcolor()",
need_clone=True, ignored_when_colors_disabled=True, initial_specified_value="specified::Color::currentcolor()",
spec="https://drafts.csswg.org/css-text-decor/#propdef-text-emphasis-color")} products="gecko",
animation_value_type="AnimatedColor",
need_clone=True,
ignored_when_colors_disabled=True,
spec="https://drafts.csswg.org/css-text-decor/#propdef-text-emphasis-color",
)}
${helpers.predefined_type( ${helpers.predefined_type(
"-moz-tab-size", "length::NonNegativeLengthOrNumber", "-moz-tab-size", "length::NonNegativeLengthOrNumber",
@ -723,21 +727,28 @@ ${helpers.predefined_type(
// CSS Compatibility // CSS Compatibility
// https://compat.spec.whatwg.org // https://compat.spec.whatwg.org
${helpers.predefined_type( ${helpers.predefined_type(
"-webkit-text-fill-color", "Color", "-webkit-text-fill-color",
"Color",
"computed_value::T::currentcolor()", "computed_value::T::currentcolor()",
products="gecko", animation_value_type="IntermediateColor", products="gecko",
need_clone=True, ignored_when_colors_disabled=True, animation_value_type="AnimatedColor",
need_clone=True,
ignored_when_colors_disabled=True,
flags="APPLIES_TO_FIRST_LETTER APPLIES_TO_FIRST_LINE APPLIES_TO_PLACEHOLDER", flags="APPLIES_TO_FIRST_LETTER APPLIES_TO_FIRST_LINE APPLIES_TO_PLACEHOLDER",
spec="https://compat.spec.whatwg.org/#the-webkit-text-fill-color")} spec="https://compat.spec.whatwg.org/#the-webkit-text-fill-color",
)}
${helpers.predefined_type( ${helpers.predefined_type(
"-webkit-text-stroke-color", "Color", "-webkit-text-stroke-color",
"Color",
"computed_value::T::currentcolor()", "computed_value::T::currentcolor()",
initial_specified_value="specified::Color::currentcolor()", initial_specified_value="specified::Color::currentcolor()",
products="gecko", animation_value_type="IntermediateColor", products="gecko",
animation_value_type="AnimatedColor",
need_clone=True, ignored_when_colors_disabled=True, need_clone=True, ignored_when_colors_disabled=True,
flags="APPLIES_TO_FIRST_LETTER APPLIES_TO_FIRST_LINE APPLIES_TO_PLACEHOLDER", flags="APPLIES_TO_FIRST_LETTER APPLIES_TO_FIRST_LINE APPLIES_TO_PLACEHOLDER",
spec="https://compat.spec.whatwg.org/#the-webkit-text-stroke-color")} spec="https://compat.spec.whatwg.org/#the-webkit-text-stroke-color",
)}
${helpers.predefined_type("-webkit-text-stroke-width", ${helpers.predefined_type("-webkit-text-stroke-width",
"BorderSideWidth", "BorderSideWidth",

15
components/style/properties/longhand/outline.mako.rs
View file

@ -10,11 +10,16 @@
additional_methods=[Method("outline_has_nonzero_width", "bool")]) %> additional_methods=[Method("outline_has_nonzero_width", "bool")]) %>
// TODO(pcwalton): `invert` // TODO(pcwalton): `invert`
${helpers.predefined_type("outline-color", "Color", "computed_value::T::currentcolor()", ${helpers.predefined_type(
initial_specified_value="specified::Color::currentcolor()", "outline-color",
animation_value_type="IntermediateColor", need_clone=True, "Color",
ignored_when_colors_disabled=True, "computed_value::T::currentcolor()",
spec="https://drafts.csswg.org/css-ui/#propdef-outline-color")} initial_specified_value="specified::Color::currentcolor()",
animation_value_type="AnimatedColor",
need_clone=True,
ignored_when_colors_disabled=True,
spec="https://drafts.csswg.org/css-ui/#propdef-outline-color",
)}
<%helpers:longhand name="outline-style" animation_value_type="discrete" <%helpers:longhand name="outline-style" animation_value_type="discrete"
spec="https://drafts.csswg.org/css-ui/#propdef-outline-style"> spec="https://drafts.csswg.org/css-ui/#propdef-outline-style">

18
components/style/properties/longhand/pointing.mako.rs
View file

@ -178,11 +178,13 @@ ${helpers.single_keyword("-moz-user-focus",
animation_value_type="discrete", animation_value_type="discrete",
spec="Nonstandard (https://developer.mozilla.org/en-US/docs/Web/CSS/-moz-user-focus)")} spec="Nonstandard (https://developer.mozilla.org/en-US/docs/Web/CSS/-moz-user-focus)")}
${helpers.predefined_type("caret-color", ${helpers.predefined_type(
"ColorOrAuto", "caret-color",
"Either::Second(Auto)", "ColorOrAuto",
spec="https://drafts.csswg.org/css-ui/#caret-color", "Either::Second(Auto)",
animation_value_type="Either<IntermediateColor, Auto>", spec="https://drafts.csswg.org/css-ui/#caret-color",
boxed=True, animation_value_type="Either<AnimatedColor, Auto>",
ignored_when_colors_disabled=True, boxed=True,
products="gecko")} ignored_when_colors_disabled=True,
products="gecko",
)}

24
components/style/properties/longhand/svg.mako.rs
View file

@ -20,11 +20,13 @@ ${helpers.single_keyword("vector-effect", "none non-scaling-stroke",
// Section 13 - Gradients and Patterns // Section 13 - Gradients and Patterns
${helpers.predefined_type( ${helpers.predefined_type(
"stop-color", "RGBAColor", "stop-color",
"RGBAColor",
"RGBA::new(0, 0, 0, 255)", "RGBA::new(0, 0, 0, 255)",
products="gecko", products="gecko",
animation_value_type="IntermediateRGBA", animation_value_type="AnimatedRGBA",
spec="https://www.w3.org/TR/SVGTiny12/painting.html#StopColorProperty")} spec="https://www.w3.org/TR/SVGTiny12/painting.html#StopColorProperty",
)}
${helpers.predefined_type("stop-opacity", "Opacity", "1.0", ${helpers.predefined_type("stop-opacity", "Opacity", "1.0",
products="gecko", products="gecko",
@ -34,22 +36,26 @@ ${helpers.predefined_type("stop-opacity", "Opacity", "1.0",
// Section 15 - Filter Effects // Section 15 - Filter Effects
${helpers.predefined_type( ${helpers.predefined_type(
"flood-color", "RGBAColor", "flood-color",
"RGBAColor",
"RGBA::new(0, 0, 0, 255)", "RGBA::new(0, 0, 0, 255)",
products="gecko", products="gecko",
animation_value_type="IntermediateRGBA", animation_value_type="AnimatedRGBA",
spec="https://www.w3.org/TR/SVG/filters.html#FloodColorProperty")} spec="https://www.w3.org/TR/SVG/filters.html#FloodColorProperty",
)}
${helpers.predefined_type("flood-opacity", "Opacity", ${helpers.predefined_type("flood-opacity", "Opacity",
"1.0", products="gecko", animation_value_type="ComputedValue", "1.0", products="gecko", animation_value_type="ComputedValue",
spec="https://www.w3.org/TR/SVG/filters.html#FloodOpacityProperty")} spec="https://www.w3.org/TR/SVG/filters.html#FloodOpacityProperty")}
${helpers.predefined_type( ${helpers.predefined_type(
"lighting-color", "RGBAColor", "lighting-color",
"RGBAColor",
"RGBA::new(255, 255, 255, 255)", "RGBA::new(255, 255, 255, 255)",
products="gecko", products="gecko",
animation_value_type="IntermediateRGBA", animation_value_type="AnimatedRGBA",
spec="https://www.w3.org/TR/SVG/filters.html#LightingColorProperty")} spec="https://www.w3.org/TR/SVG/filters.html#LightingColorProperty",
)}
// CSS Masking Module Level 1 // CSS Masking Module Level 1
// https://drafts.fxtf.org/css-masking // https://drafts.fxtf.org/css-masking

8
components/style/properties/longhand/text.mako.rs
View file

@ -268,14 +268,16 @@ ${helpers.single_keyword("text-decoration-style",
spec="https://drafts.csswg.org/css-text-decor/#propdef-text-decoration-style")} spec="https://drafts.csswg.org/css-text-decor/#propdef-text-decoration-style")}
${helpers.predefined_type( ${helpers.predefined_type(
"text-decoration-color", "Color", "text-decoration-color",
"Color",
"computed_value::T::currentcolor()", "computed_value::T::currentcolor()",
initial_specified_value="specified::Color::currentcolor()", initial_specified_value="specified::Color::currentcolor()",
products="gecko", products="gecko",
animation_value_type="IntermediateColor", animation_value_type="AnimatedColor",
ignored_when_colors_disabled=True, ignored_when_colors_disabled=True,
flags="APPLIES_TO_FIRST_LETTER APPLIES_TO_FIRST_LINE APPLIES_TO_PLACEHOLDER", flags="APPLIES_TO_FIRST_LETTER APPLIES_TO_FIRST_LINE APPLIES_TO_PLACEHOLDER",
spec="https://drafts.csswg.org/css-text-decor/#propdef-text-decoration-color")} spec="https://drafts.csswg.org/css-text-decor/#propdef-text-decoration-color",
)}
${helpers.predefined_type( ${helpers.predefined_type(
"initial-letter", "initial-letter",

214
components/style/values/animated/color.rs Normal file
View file

@ -0,0 +1,214 @@
/* 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 http://mozilla.org/MPL/2.0/. */
//! Animated types for CSS colors.
use properties::animated_properties::Animatable;
use values::animated::ToAnimatedZero;
use values::distance::{ComputeSquaredDistance, SquaredDistance};
/// An animated RGBA color.
///
/// Unlike in computed values, each component value may exceed the
/// range `[0.0, 1.0]`.
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
#[derive(Clone, Copy, Debug, PartialEq)]
pub struct RGBA {
/// The red component.
pub red: f32,
/// The green component.
pub green: f32,
/// The blue component.
pub blue: f32,
/// The alpha component.
pub alpha: f32,
}
impl RGBA {
/// Returns a transparent color.
#[inline]
pub fn transparent() -> Self {
Self::new(0., 0., 0., 0.)
}
/// Returns a new color.
#[inline]
pub fn new(red: f32, green: f32, blue: f32, alpha: f32) -> Self {
RGBA { red: red, green: green, blue: blue, alpha: alpha }
}
}
/// Unlike Animatable for computed colors, we don't clamp any component values.
///
/// FIXME(nox): Why do computed colors even implement Animatable?
impl Animatable for RGBA {
#[inline]
fn add_weighted(&self, other: &Self, self_portion: f64, other_portion: f64) -> Result<Self, ()> {
let mut alpha = self.alpha.add_weighted(&other.alpha, self_portion, other_portion)?;
if alpha <= 0. {
// Ideally we should return color value that only alpha component is
// 0, but this is what current gecko does.
return Ok(RGBA::transparent());
}
alpha = alpha.min(1.);
let red = (self.red * self.alpha).add_weighted(
&(other.red * other.alpha), self_portion, other_portion
)? * 1. / alpha;
let green = (self.green * self.alpha).add_weighted(
&(other.green * other.alpha), self_portion, other_portion
)? * 1. / alpha;
let blue = (self.blue * self.alpha).add_weighted(
&(other.blue * other.alpha), self_portion, other_portion
)? * 1. / alpha;
Ok(RGBA::new(red, green, blue, alpha))
}
}
impl ComputeSquaredDistance for RGBA {
#[inline]
fn compute_squared_distance(&self, other: &Self) -> Result<SquaredDistance, ()> {
let start = [ self.alpha, self.red * self.alpha, self.green * self.alpha, self.blue * self.alpha ];
let end = [ other.alpha, other.red * other.alpha, other.green * other.alpha, other.blue * other.alpha ];
start.iter().zip(&end).map(|(this, other)| this.compute_squared_distance(other)).sum()
}
}
impl ToAnimatedZero for RGBA {
#[inline]
fn to_animated_zero(&self) -> Result<Self, ()> {
Ok(RGBA::transparent())
}
}
#[allow(missing_docs)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
#[derive(Clone, Copy, Debug, PartialEq)]
pub struct Color {
pub color: RGBA,
pub foreground_ratio: f32,
}
impl Color {
fn currentcolor() -> Self {
Color {
color: RGBA::transparent(),
foreground_ratio: 1.,
}
}
/// Returns a transparent intermediate color.
pub fn transparent() -> Self {
Color {
color: RGBA::transparent(),
foreground_ratio: 0.,
}
}
fn is_currentcolor(&self) -> bool {
self.foreground_ratio >= 1.
}
fn is_numeric(&self) -> bool {
self.foreground_ratio <= 0.
}
fn effective_intermediate_rgba(&self) -> RGBA {
RGBA {
alpha: self.color.alpha * (1. - self.foreground_ratio),
.. self.color
}
}
}
impl Animatable for Color {
#[inline]
fn add_weighted(&self, other: &Self, self_portion: f64, other_portion: f64) -> Result<Self, ()> {
// Common cases are interpolating between two numeric colors,
// two currentcolors, and a numeric color and a currentcolor.
//
// Note: this algorithm assumes self_portion + other_portion
// equals to one, so it may be broken for additive operation.
// To properly support additive color interpolation, we would
// need two ratio fields in computed color types.
if self.foreground_ratio == other.foreground_ratio {
if self.is_currentcolor() {
Ok(Color::currentcolor())
} else {
Ok(Color {
color: self.color.add_weighted(&other.color, self_portion, other_portion)?,
foreground_ratio: self.foreground_ratio,
})
}
} else if self.is_currentcolor() && other.is_numeric() {
Ok(Color {
color: other.color,
foreground_ratio: self_portion as f32,
})
} else if self.is_numeric() && other.is_currentcolor() {
Ok(Color {
color: self.color,
foreground_ratio: other_portion as f32,
})
} else {
// For interpolating between two complex colors, we need to
// generate colors with effective alpha value.
let self_color = self.effective_intermediate_rgba();
let other_color = other.effective_intermediate_rgba();
let color = self_color.add_weighted(&other_color, self_portion, other_portion)?;
// Then we compute the final foreground ratio, and derive
// the final alpha value from the effective alpha value.
let foreground_ratio = self.foreground_ratio
.add_weighted(&other.foreground_ratio, self_portion, other_portion)?;
let alpha = color.alpha / (1. - foreground_ratio);
Ok(Color {
color: RGBA {
alpha: alpha,
.. color
},
foreground_ratio: foreground_ratio,
})
}
}
}
impl ComputeSquaredDistance for Color {
#[inline]
fn compute_squared_distance(&self, other: &Self) -> Result<SquaredDistance, ()> {
// All comments in add_weighted also applies here.
if self.foreground_ratio == other.foreground_ratio {
if self.is_currentcolor() {
Ok(SquaredDistance::Value(0.))
} else {
self.color.compute_squared_distance(&other.color)
}
} else if self.is_currentcolor() && other.is_numeric() {
Ok(
RGBA::transparent().compute_squared_distance(&other.color)? +
SquaredDistance::Value(1.),
)
} else if self.is_numeric() && other.is_currentcolor() {
Ok(
self.color.compute_squared_distance(&RGBA::transparent())? +
SquaredDistance::Value(1.),
)
} else {
let self_color = self.effective_intermediate_rgba();
let other_color = other.effective_intermediate_rgba();
Ok(
self_color.compute_squared_distance(&other_color)? +
self.foreground_ratio.compute_squared_distance(&other.foreground_ratio)?,
)
}
}
}
impl ToAnimatedZero for Color {
#[inline]
fn to_animated_zero(&self) -> Result<Self, ()> {
/// FIXME(nox): This does not look correct to me.
Err(())
}
}

9
components/style/values/animated/effects.rs
View file

@ -4,7 +4,7 @@
//! Animated types for CSS values related to effects. //! Animated types for CSS values related to effects.
use properties::animated_properties::{Animatable, IntermediateColor}; use properties::animated_properties::Animatable;
use properties::longhands::box_shadow::computed_value::T as ComputedBoxShadowList; use properties::longhands::box_shadow::computed_value::T as ComputedBoxShadowList;
use properties::longhands::filter::computed_value::T as ComputedFilterList; use properties::longhands::filter::computed_value::T as ComputedFilterList;
use properties::longhands::text_shadow::computed_value::T as ComputedTextShadowList; use properties::longhands::text_shadow::computed_value::T as ComputedTextShadowList;
@ -12,6 +12,7 @@ use std::cmp;
#[cfg(not(feature = "gecko"))] #[cfg(not(feature = "gecko"))]
use values::Impossible; use values::Impossible;
use values::animated::{ToAnimatedValue, ToAnimatedZero}; use values::animated::{ToAnimatedValue, ToAnimatedZero};
use values::animated::color::Color;
use values::computed::{Angle, NonNegativeNumber}; use values::computed::{Angle, NonNegativeNumber};
use values::computed::length::{Length, NonNegativeLength}; use values::computed::length::{Length, NonNegativeLength};
use values::distance::{ComputeSquaredDistance, SquaredDistance}; use values::distance::{ComputeSquaredDistance, SquaredDistance};
@ -33,7 +34,7 @@ pub type TextShadowList = ShadowList<SimpleShadow>;
pub struct ShadowList<Shadow>(Vec<Shadow>); pub struct ShadowList<Shadow>(Vec<Shadow>);
/// An animated value for a single `box-shadow`. /// An animated value for a single `box-shadow`.
pub type BoxShadow = GenericBoxShadow<IntermediateColor, Length, NonNegativeLength, Length>; pub type BoxShadow = GenericBoxShadow<Color, Length, NonNegativeLength, Length>;
/// An animated value for the `filter` property. /// An animated value for the `filter` property.
#[cfg_attr(feature = "servo", derive(HeapSizeOf))] #[cfg_attr(feature = "servo", derive(HeapSizeOf))]
@ -49,7 +50,7 @@ pub type Filter = GenericFilter<Angle, NonNegativeNumber, NonNegativeLength, Sim
pub type Filter = GenericFilter<Angle, NonNegativeNumber, NonNegativeLength, Impossible>; pub type Filter = GenericFilter<Angle, NonNegativeNumber, NonNegativeLength, Impossible>;
/// An animated value for the `drop-shadow()` filter. /// An animated value for the `drop-shadow()` filter.
pub type SimpleShadow = GenericSimpleShadow<IntermediateColor, Length, NonNegativeLength>; pub type SimpleShadow = GenericSimpleShadow<Color, Length, NonNegativeLength>;
impl ToAnimatedValue for ComputedBoxShadowList { impl ToAnimatedValue for ComputedBoxShadowList {
type AnimatedValue = BoxShadowList; type AnimatedValue = BoxShadowList;
@ -231,7 +232,7 @@ impl ToAnimatedZero for SimpleShadow {
#[inline] #[inline]
fn to_animated_zero(&self) -> Result<Self, ()> { fn to_animated_zero(&self) -> Result<Self, ()> {
Ok(SimpleShadow { Ok(SimpleShadow {
color: IntermediateColor::transparent(), color: Color::transparent(),
horizontal: self.horizontal.to_animated_zero()?, horizontal: self.horizontal.to_animated_zero()?,
vertical: self.vertical.to_animated_zero()?, vertical: self.vertical.to_animated_zero()?,
blur: self.blur.to_animated_zero()?, blur: self.blur.to_animated_zero()?,

1
components/style/values/animated/mod.rs
View file

@ -24,6 +24,7 @@ use values::computed::NonNegativeNumber as ComputedNonNegativeNumber;
use values::computed::PositiveInteger as ComputedPositiveInteger; use values::computed::PositiveInteger as ComputedPositiveInteger;
use values::specified::url::SpecifiedUrl; use values::specified::url::SpecifiedUrl;
pub mod color;
pub mod effects; pub mod effects;
/// Conversion between computed values and intermediate values for animations. /// Conversion between computed values and intermediate values for animations.

9
components/style/values/computed/border.rs
View file

@ -4,6 +4,7 @@
//! Computed types for CSS values related to borders. //! Computed types for CSS values related to borders.
use values::animated::ToAnimatedZero;
use values::computed::{Number, NumberOrPercentage}; use values::computed::{Number, NumberOrPercentage};
use values::computed::length::LengthOrPercentage; use values::computed::length::LengthOrPercentage;
use values::generics::border::BorderCornerRadius as GenericBorderCornerRadius; use values::generics::border::BorderCornerRadius as GenericBorderCornerRadius;
@ -34,3 +35,11 @@ impl BorderImageSideWidth {
GenericBorderImageSideWidth::Number(1.) GenericBorderImageSideWidth::Number(1.)
} }
} }
impl ToAnimatedZero for BorderCornerRadius {
#[inline]
fn to_animated_zero(&self) -> Result<Self, ()> {
/// FIXME(nox): Why?
Err(())
}
}

66
components/style/values/computed/color.rs
View file

@ -7,6 +7,8 @@
use cssparser::{Color as CSSParserColor, RGBA}; use cssparser::{Color as CSSParserColor, RGBA};
use std::fmt; use std::fmt;
use style_traits::ToCss; use style_traits::ToCss;
use values::animated::ToAnimatedValue;
use values::animated::color::{Color as AnimatedColor, RGBA as AnimatedRGBA};
/// This struct represents a combined color from a numeric color and /// This struct represents a combined color from a numeric color and
/// the current foreground color (currentcolor keyword). /// the current foreground color (currentcolor keyword).
@ -21,13 +23,8 @@ pub struct Color {
pub foreground_ratio: u8, pub foreground_ratio: u8,
} }
fn blend_color_component(bg: u8, fg: u8, fg_alpha: u8) -> u8 { /// Computed value type for the specified RGBAColor.
let bg_ratio = (u8::max_value() - fg_alpha) as u32; pub type RGBAColor = RGBA;
let fg_ratio = fg_alpha as u32;
let color = bg as u32 * bg_ratio + fg as u32 * fg_ratio;
// Rounding divide the number by 255
((color + 127) / 255) as u8
}
impl Color { impl Color {
/// Returns a numeric color representing the given RGBA value. /// Returns a numeric color representing the given RGBA value.
@ -72,6 +69,15 @@ impl Color {
if self.is_currentcolor() { if self.is_currentcolor() {
return fg_color.clone(); return fg_color.clone();
} }
fn blend_color_component(bg: u8, fg: u8, fg_alpha: u8) -> u8 {
let bg_ratio = (u8::max_value() - fg_alpha) as u32;
let fg_ratio = fg_alpha as u32;
let color = bg as u32 * bg_ratio + fg as u32 * fg_ratio;
// Rounding divide the number by 255
((color + 127) / 255) as u8
}
// Common case that alpha channel is equal (usually both are opaque). // Common case that alpha channel is equal (usually both are opaque).
let fg_ratio = self.foreground_ratio; let fg_ratio = self.foreground_ratio;
if self.color.alpha == fg_color.alpha { if self.color.alpha == fg_color.alpha {
@ -140,5 +146,47 @@ impl ToCss for Color {
} }
} }
/// Computed value type for the specified RGBAColor. impl ToAnimatedValue for Color {
pub type RGBAColor = RGBA; type AnimatedValue = AnimatedColor;
#[inline]
fn to_animated_value(self) -> Self::AnimatedValue {
AnimatedColor {
color: self.color.to_animated_value(),
foreground_ratio: self.foreground_ratio as f32 * (1. / 255.),
}
}
#[inline]
fn from_animated_value(animated: Self::AnimatedValue) -> Self {
Color {
color: RGBA::from_animated_value(animated.color),
foreground_ratio: (animated.foreground_ratio * 255.).round() as u8,
}
}
}
impl ToAnimatedValue for RGBA {
type AnimatedValue = AnimatedRGBA;
#[inline]
fn to_animated_value(self) -> Self::AnimatedValue {
AnimatedRGBA::new(
self.red_f32(),
self.green_f32(),
self.blue_f32(),
self.alpha_f32(),
)
}
#[inline]
fn from_animated_value(animated: Self::AnimatedValue) -> Self {
// RGBA::from_floats clamps each component values.
RGBA::from_floats(
animated.red,
animated.green,
animated.blue,
animated.alpha,
)
}
}

41
components/style/values/computed/mod.rs
View file

@ -49,6 +49,7 @@ pub use super::generics::grid::GridLine;
pub use self::length::{CalcLengthOrPercentage, Length, LengthOrNone, LengthOrNumber, LengthOrPercentage}; pub use self::length::{CalcLengthOrPercentage, Length, LengthOrNone, LengthOrNumber, LengthOrPercentage};
pub use self::length::{LengthOrPercentageOrAuto, LengthOrPercentageOrNone, MaxLength, MozLength}; pub use self::length::{LengthOrPercentageOrAuto, LengthOrPercentageOrNone, MaxLength, MozLength};
pub use self::length::NonNegativeLengthOrPercentage; pub use self::length::NonNegativeLengthOrPercentage;
pub use self::percentage::Percentage;
pub use self::position::Position; pub use self::position::Position;
pub use self::svg::{SVGLength, SVGOpacity, SVGPaint, SVGPaintKind, SVGStrokeDashArray, SVGWidth}; pub use self::svg::{SVGLength, SVGOpacity, SVGPaint, SVGPaintKind, SVGStrokeDashArray, SVGWidth};
pub use self::text::{InitialLetter, LetterSpacing, LineHeight, WordSpacing}; pub use self::text::{InitialLetter, LetterSpacing, LineHeight, WordSpacing};
@ -66,6 +67,7 @@ pub mod image;
#[cfg(feature = "gecko")] #[cfg(feature = "gecko")]
pub mod gecko; pub mod gecko;
pub mod length; pub mod length;
pub mod percentage;
pub mod position; pub mod position;
pub mod rect; pub mod rect;
pub mod svg; pub mod svg;
@ -658,45 +660,6 @@ impl From<Au> for NonNegativeAu {
} }
} }
/// A computed `<percentage>` value.
#[derive(Clone, ComputeSquaredDistance, Copy, Debug, Default, HasViewportPercentage, PartialEq)]
#[cfg_attr(feature = "servo", derive(Deserialize, HeapSizeOf, Serialize))]
pub struct Percentage(pub CSSFloat);
impl Percentage {
/// 0%
#[inline]
pub fn zero() -> Self {
Percentage(0.)
}
/// 100%
#[inline]
pub fn hundred() -> Self {
Percentage(1.)
}
}
impl ToCss for Percentage {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
write!(dest, "{}%", self.0 * 100.)
}
}
impl ToComputedValue for specified::Percentage {
type ComputedValue = Percentage;
#[inline]
fn to_computed_value(&self, _: &Context) -> Percentage {
Percentage(self.get())
}
#[inline]
fn from_computed_value(computed: &Percentage) -> Self {
specified::Percentage::new(computed.0)
}
}
/// The computed value of a CSS `url()`, resolved relative to the stylesheet URL. /// The computed value of a CSS `url()`, resolved relative to the stylesheet URL.
#[cfg(feature = "servo")] #[cfg(feature = "servo")]
#[derive(Clone, Debug, HeapSizeOf, Serialize, Deserialize, PartialEq)] #[derive(Clone, Debug, HeapSizeOf, Serialize, Deserialize, PartialEq)]

54
components/style/values/computed/percentage.rs Normal file
View file

@ -0,0 +1,54 @@
/* 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 http://mozilla.org/MPL/2.0/. */
//! Computed percentages.
use properties::animated_properties::Animatable;
use std::fmt;
use style_traits::ToCss;
use values::CSSFloat;
use values::animated::ToAnimatedZero;
/// A computed percentage.
#[derive(Clone, ComputeSquaredDistance, Copy, Debug, Default, HasViewportPercentage, PartialEq)]
#[cfg_attr(feature = "servo", derive(Deserialize, HeapSizeOf, Serialize))]
pub struct Percentage(pub CSSFloat);
impl Percentage {
/// 0%
#[inline]
pub fn zero() -> Self {
Percentage(0.)
}
/// 100%
#[inline]
pub fn hundred() -> Self {
Percentage(1.)
}
}
/// https://drafts.csswg.org/css-transitions/#animtype-percentage
impl Animatable for Percentage {
#[inline]
fn add_weighted(&self, other: &Self, self_portion: f64, other_portion: f64) -> Result<Self, ()> {
Ok(Percentage((self.0 as f64 * self_portion + other.0 as f64 * other_portion) as f32))
}
}
impl ToAnimatedZero for Percentage {
#[inline]
fn to_animated_zero(&self) -> Result<Self, ()> {
Ok(Percentage(0.))
}
}
impl ToCss for Percentage {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result
where
W: fmt::Write,
{
write!(dest, "{}%", self.0 * 100.)
}
}

2
components/style/values/specified/length.rs
View file

@ -785,7 +785,7 @@ impl From<NoCalcLength> for LengthOrPercentage {
impl From<Percentage> for LengthOrPercentage { impl From<Percentage> for LengthOrPercentage {
#[inline] #[inline]
fn from(pc: Percentage) -> Self { fn from(pc: Percentage) -> Self {
if pc.calc_clamping_mode.is_some() { if pc.is_calc() {
LengthOrPercentage::Calc(Box::new(CalcLengthOrPercentage { LengthOrPercentage::Calc(Box::new(CalcLengthOrPercentage {
percentage: Some(computed::Percentage(pc.get())), percentage: Some(computed::Percentage(pc.get())),
.. Default::default() .. Default::default()

120
components/style/values/specified/mod.rs
View file

@ -44,6 +44,7 @@ pub use self::length::{LengthOrPercentageOrNone, MaxLength, MozLength};
pub use self::length::{NoCalcLength, ViewportPercentageLength}; pub use self::length::{NoCalcLength, ViewportPercentageLength};
pub use self::length::NonNegativeLengthOrPercentage; pub use self::length::NonNegativeLengthOrPercentage;
pub use self::rect::LengthOrNumberRect; pub use self::rect::LengthOrNumberRect;
pub use self::percentage::Percentage;
pub use self::position::{Position, PositionComponent}; pub use self::position::{Position, PositionComponent};
pub use self::svg::{SVGLength, SVGOpacity, SVGPaint, SVGPaintKind, SVGStrokeDashArray, SVGWidth}; pub use self::svg::{SVGLength, SVGOpacity, SVGPaint, SVGPaintKind, SVGStrokeDashArray, SVGWidth};
pub use self::text::{InitialLetter, LetterSpacing, LineHeight, WordSpacing}; pub use self::text::{InitialLetter, LetterSpacing, LineHeight, WordSpacing};
@ -65,6 +66,7 @@ pub mod gecko;
pub mod grid; pub mod grid;
pub mod image; pub mod image;
pub mod length; pub mod length;
pub mod percentage;
pub mod position; pub mod position;
pub mod rect; pub mod rect;
pub mod svg; pub mod svg;
@ -1047,121 +1049,3 @@ impl ToCss for Attr {
} }
impl ComputedValueAsSpecified for Attr {} impl ComputedValueAsSpecified for Attr {}
/// A percentage value.
#[derive(Clone, Copy, Debug, Default, PartialEq)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
pub struct Percentage {
/// The percentage value as a float.
///
/// [0 .. 100%] maps to [0.0 .. 1.0]
value: CSSFloat,
/// If this percentage came from a calc() expression, this tells how
/// clamping should be done on the value.
calc_clamping_mode: Option<AllowedNumericType>,
}
no_viewport_percentage!(Percentage);
impl ToCss for Percentage {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result
where W: fmt::Write,
{
if self.calc_clamping_mode.is_some() {
dest.write_str("calc(")?;
}
write!(dest, "{}%", self.value * 100.)?;
if self.calc_clamping_mode.is_some() {
dest.write_str(")")?;
}
Ok(())
}
}
impl Percentage {
/// Create a percentage from a numeric value.
pub fn new(value: CSSFloat) -> Self {
Self {
value,
calc_clamping_mode: None,
}
}
/// Get the underlying value for this float.
pub fn get(&self) -> CSSFloat {
self.calc_clamping_mode.map_or(self.value, |mode| mode.clamp(self.value))
}
/// Reverse this percentage, preserving calc-ness.
///
/// For example: If it was 20%, convert it into 80%.
pub fn reverse(&mut self) {
let new_value = 1. - self.value;
self.value = new_value;
}
/// Parse a specific kind of percentage.
pub fn parse_with_clamping_mode<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>,
num_context: AllowedNumericType,
) -> Result<Self, ParseError<'i>> {
// FIXME: remove early returns when lifetimes are non-lexical
match *input.next()? {
Token::Percentage { unit_value, .. } if num_context.is_ok(context.parsing_mode, unit_value) => {
return Ok(Percentage::new(unit_value))
}
Token::Function(ref name) if name.eq_ignore_ascii_case("calc") => {}
ref t => return Err(BasicParseError::UnexpectedToken(t.clone()).into())
}
let result = input.parse_nested_block(|i| {
CalcNode::parse_percentage(context, i)
})?;
// TODO(emilio): -moz-image-rect is the only thing that uses
// the clamping mode... I guess we could disallow it...
Ok(Percentage {
value: result,
calc_clamping_mode: Some(num_context),
})
}
/// Parses a percentage token, but rejects it if it's negative.
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)
}
/// 0%
#[inline]
pub fn zero() -> Self {
Percentage {
value: 0.,
calc_clamping_mode: None,
}
}
/// 100%
#[inline]
pub fn hundred() -> Self {
Percentage {
value: 1.,
calc_clamping_mode: None,
}
}
}
impl Parse for Percentage {
#[inline]
fn parse<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>
) -> Result<Self, ParseError<'i>> {
Self::parse_with_clamping_mode(context, input, AllowedNumericType::All)
}
}

152
components/style/values/specified/percentage.rs Normal file
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@ -0,0 +1,152 @@
/* 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 http://mozilla.org/MPL/2.0/. */
//! Specified percentages.
use cssparser::{BasicParseError, Parser, Token};
use parser::{Parse, ParserContext};
use std::ascii::AsciiExt;
use std::fmt;
use style_traits::{ParseError, ToCss};
use style_traits::values::specified::AllowedNumericType;
use values::CSSFloat;
use values::computed::{Context, ToComputedValue};
use values::computed::percentage::Percentage as ComputedPercentage;
use values::specified::calc::CalcNode;
/// A percentage value.
#[derive(Clone, Copy, Debug, Default, PartialEq)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
pub struct Percentage {
/// The percentage value as a float.
///
/// [0 .. 100%] maps to [0.0 .. 1.0]
value: CSSFloat,
/// If this percentage came from a calc() expression, this tells how
/// clamping should be done on the value.
calc_clamping_mode: Option<AllowedNumericType>,
}
no_viewport_percentage!(Percentage);
impl ToCss for Percentage {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result
where W: fmt::Write,
{
if self.calc_clamping_mode.is_some() {
dest.write_str("calc(")?;
}
write!(dest, "{}%", self.value * 100.)?;
if self.calc_clamping_mode.is_some() {
dest.write_str(")")?;
}
Ok(())
}
}
impl Percentage {
/// Creates a percentage from a numeric value.
pub fn new(value: CSSFloat) -> Self {
Self {
value,
calc_clamping_mode: None,
}
}
/// `0%`
#[inline]
pub fn zero() -> Self {
Percentage {
value: 0.,
calc_clamping_mode: None,
}
}
/// `100%`
#[inline]
pub fn hundred() -> Self {
Percentage {
value: 1.,
calc_clamping_mode: None,
}
}
/// Gets the underlying value for this float.
pub fn get(&self) -> CSSFloat {
self.calc_clamping_mode.map_or(self.value, |mode| mode.clamp(self.value))
}
/// Returns whether this percentage is a `calc()` value.
pub fn is_calc(&self) -> bool {
self.calc_clamping_mode.is_some()
}
/// Reverses this percentage, preserving calc-ness.
///
/// For example: If it was 20%, convert it into 80%.
pub fn reverse(&mut self) {
let new_value = 1. - self.value;
self.value = new_value;
}
/// Parses a specific kind of percentage.
pub fn parse_with_clamping_mode<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>,
num_context: AllowedNumericType,
) -> Result<Self, ParseError<'i>> {
// FIXME: remove early returns when lifetimes are non-lexical
match *input.next()? {
Token::Percentage { unit_value, .. } if num_context.is_ok(context.parsing_mode, unit_value) => {
return Ok(Percentage::new(unit_value));
}
Token::Function(ref name) if name.eq_ignore_ascii_case("calc") => {},
ref t => return Err(BasicParseError::UnexpectedToken(t.clone()).into()),
}
let result = input.parse_nested_block(|i| {
CalcNode::parse_percentage(context, i)
})?;
// TODO(emilio): -moz-image-rect is the only thing that uses
// the clamping mode... I guess we could disallow it...
Ok(Percentage {
value: result,
calc_clamping_mode: Some(num_context),
})
}
/// Parses a percentage token, but rejects it if it's negative.
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)
}
}
impl Parse for Percentage {
#[inline]
fn parse<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>
) -> Result<Self, ParseError<'i>> {
Self::parse_with_clamping_mode(context, input, AllowedNumericType::All)
}
}
impl ToComputedValue for Percentage {
type ComputedValue = ComputedPercentage;
#[inline]
fn to_computed_value(&self, _: &Context) -> Self::ComputedValue {
ComputedPercentage(self.get())
}
#[inline]
fn from_computed_value(computed: &Self::ComputedValue) -> Self {
Percentage::new(computed.0)
}
}

2
components/style/values/specified/rect.rs
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@ -2,7 +2,7 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this * License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! Computed types for CSS borders. //! Specified types for CSS borders.
use cssparser::Parser; use cssparser::Parser;
use parser::ParserContext; use parser::ParserContext;