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Auto merge of #16229 - tomhoule:fix-lengths, r=emilio
style: Do not immediately convert absolute specified lengths <!-- Please describe your changes on the following line: --> This PR aims to solve issue #15729. I tried to follow the recommendations there as much as possible. This is my first attempt at contributing to Servo, so this will probably need a lot of input, although I'm eager to make it as polished as possible. - The base inaccuracy issue seems solved, as can be easily verified with the `console.log` based example in the issue. - Very basic unit tests were added. I have doubts mainly about the right way to represent these new enum variants for the various length units: 1. With new enum variants in `NoCalcLength` *and* newtypes (current solution) 2. With a `NoCalcLength::Absolute` variant that contains a new `AbsoluteLength` enum, but without newtypes 3. Same as solution 2 but with newtypes - I mostly cared about unit tests until now but will investigate other types of tests - Tests to check the clamping - Write a proper commit message Thanks for your time and feedback :) --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: --> - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #15729. <!-- Either: --> - [X] There are tests for these changes <!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.--> <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. --> <!-- Reviewable:start --> --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/16229) <!-- Reviewable:end -->
This commit is contained in:
bors-servo
GitHub
commit
c8cd70f333
12 changed files with 161 additions and 51 deletions
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@ -561,7 +561,7 @@ impl LayoutElementHelpers for LayoutJS<Element> {
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}
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LengthOrPercentageOrAuto::Length(length) => {
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let width_value = specified::LengthOrPercentageOrAuto::Length(
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specified::NoCalcLength::Absolute(length));
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specified::NoCalcLength::Absolute(specified::AbsoluteLength::Px(length.to_f32_px())));
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hints.push(from_declaration(
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shared_lock,
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PropertyDeclaration::Width(width_value)));
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@ -590,7 +590,7 @@ impl LayoutElementHelpers for LayoutJS<Element> {
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}
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LengthOrPercentageOrAuto::Length(length) => {
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let height_value = specified::LengthOrPercentageOrAuto::Length(
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specified::NoCalcLength::Absolute(length));
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specified::NoCalcLength::Absolute(specified::AbsoluteLength::Px(length.to_f32_px())));
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hints.push(from_declaration(
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shared_lock,
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PropertyDeclaration::Height(height_value)));
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@ -10,7 +10,7 @@ use std::fmt;
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use style_traits::ToCss;
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use super::{Number, ToComputedValue, Context};
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use values::{Auto, CSSFloat, Either, ExtremumLength, None_, Normal, specified};
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use values::specified::length::{FontRelativeLength, ViewportPercentageLength};
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use values::specified::length::{AbsoluteLength, FontRelativeLength, ViewportPercentageLength};
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pub use super::image::{EndingShape as GradientShape, Gradient, GradientKind, Image};
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pub use super::image::{LengthOrKeyword, LengthOrPercentageOrKeyword};
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@ -22,7 +22,8 @@ impl ToComputedValue for specified::NoCalcLength {
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#[inline]
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fn to_computed_value(&self, context: &Context) -> Au {
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match *self {
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specified::NoCalcLength::Absolute(length) => length,
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specified::NoCalcLength::Absolute(length) =>
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length.to_computed_value(context),
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specified::NoCalcLength::FontRelative(length) =>
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length.to_computed_value(context, /* use inherited */ false),
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specified::NoCalcLength::ViewportPercentage(length) =>
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@ -34,7 +35,7 @@ impl ToComputedValue for specified::NoCalcLength {
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#[inline]
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fn from_computed_value(computed: &Au) -> Self {
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specified::NoCalcLength::Absolute(*computed)
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specified::NoCalcLength::Absolute(AbsoluteLength::Px(computed.to_f32_px()))
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}
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}
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@ -16,7 +16,7 @@ use std::ascii::AsciiExt;
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use std::ops::Mul;
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use style_traits::ToCss;
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use style_traits::values::specified::AllowedNumericType;
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use super::{Angle, Number, SimplifiedValueNode, SimplifiedSumNode, Time};
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use super::{Angle, Number, SimplifiedValueNode, SimplifiedSumNode, Time, ToComputedValue};
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use values::{Auto, CSSFloat, Either, FONT_MEDIUM_PX, HasViewportPercentage, None_, Normal};
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use values::ExtremumLength;
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use values::computed::{ComputedValueAsSpecified, Context};
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@ -202,14 +202,122 @@ impl CharacterWidth {
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}
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}
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/// Same as Gecko
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const ABSOLUTE_LENGTH_MAX: i32 = (1 << 30);
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const ABSOLUTE_LENGTH_MIN: i32 = - (1 << 30);
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/// Helper to convert a floating point length to application units
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fn to_au_round(length: CSSFloat, au_per_unit: CSSFloat) -> Au {
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Au(
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(length * au_per_unit)
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.min(ABSOLUTE_LENGTH_MAX as f32)
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.max(ABSOLUTE_LENGTH_MIN as f32)
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.round() as i32
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)
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}
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/// Represents an absolute length with its unit
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#[derive(Clone, PartialEq, Copy, Debug)]
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#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
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pub enum AbsoluteLength {
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/// An absolute length in pixels (px)
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Px(CSSFloat),
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/// An absolute length in inches (in)
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In(CSSFloat),
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/// An absolute length in centimeters (cm)
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Cm(CSSFloat),
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/// An absolute length in millimeters (mm)
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Mm(CSSFloat),
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/// An absolute length in quarter-millimeters (q)
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Q(CSSFloat),
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/// An absolute length in points (pt)
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Pt(CSSFloat),
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/// An absolute length in pica (pc)
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Pc(CSSFloat),
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}
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impl AbsoluteLength {
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fn is_zero(&self) -> bool {
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match *self {
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AbsoluteLength::Px(0.)
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| AbsoluteLength::In(0.)
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| AbsoluteLength::Cm(0.)
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| AbsoluteLength::Mm(0.)
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| AbsoluteLength::Q(0.)
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| AbsoluteLength::Pt(0.)
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| AbsoluteLength::Pc(0.) => true,
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_ => false,
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}
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}
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}
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impl ToComputedValue for AbsoluteLength {
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type ComputedValue = Au;
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fn to_computed_value(&self, _: &Context) -> Au {
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Au::from(*self)
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}
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fn from_computed_value(computed: &Au) -> AbsoluteLength {
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AbsoluteLength::Px(computed.to_f32_px())
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}
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}
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impl From<AbsoluteLength> for Au {
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fn from(length: AbsoluteLength) -> Au {
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match length {
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AbsoluteLength::Px(value) => to_au_round(value, AU_PER_PX),
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AbsoluteLength::In(value) => to_au_round(value, AU_PER_IN),
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AbsoluteLength::Cm(value) => to_au_round(value, AU_PER_CM),
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AbsoluteLength::Mm(value) => to_au_round(value, AU_PER_MM),
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AbsoluteLength::Q(value) => to_au_round(value, AU_PER_Q),
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AbsoluteLength::Pt(value) => to_au_round(value, AU_PER_PT),
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AbsoluteLength::Pc(value) => to_au_round(value, AU_PER_PC),
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}
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}
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}
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impl ToCss for AbsoluteLength {
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fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
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match *self {
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AbsoluteLength::Px(length) => write!(dest, "{}px", length),
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AbsoluteLength::In(length) => write!(dest, "{}in", length),
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AbsoluteLength::Cm(length) => write!(dest, "{}cm", length),
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AbsoluteLength::Mm(length) => write!(dest, "{}mm", length),
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AbsoluteLength::Q(length) => write!(dest, "{}q", length),
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AbsoluteLength::Pt(length) => write!(dest, "{}pt", length),
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AbsoluteLength::Pc(length) => write!(dest, "{}pc", length),
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}
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}
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}
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impl Mul<CSSFloat> for AbsoluteLength {
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type Output = AbsoluteLength;
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#[inline]
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fn mul(self, scalar: CSSFloat) -> AbsoluteLength {
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match self {
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AbsoluteLength::Px(v) => AbsoluteLength::Px(v * scalar),
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AbsoluteLength::In(v) => AbsoluteLength::In(v * scalar),
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AbsoluteLength::Cm(v) => AbsoluteLength::Cm(v * scalar),
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AbsoluteLength::Mm(v) => AbsoluteLength::Mm(v * scalar),
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AbsoluteLength::Q(v) => AbsoluteLength::Q(v * scalar),
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AbsoluteLength::Pt(v) => AbsoluteLength::Pt(v * scalar),
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AbsoluteLength::Pc(v) => AbsoluteLength::Pc(v * scalar),
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}
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}
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}
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/// A `<length>` without taking `calc` expressions into account
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///
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/// https://drafts.csswg.org/css-values/#lengths
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#[derive(Clone, PartialEq, Copy, Debug)]
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#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
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pub enum NoCalcLength {
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/// An absolute length: https://drafts.csswg.org/css-values/#absolute-length
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Absolute(Au), // application units
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/// An absolute length
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///
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/// https://drafts.csswg.org/css-values/#absolute-length
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Absolute(AbsoluteLength),
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/// A font-relative length:
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///
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@ -240,7 +348,7 @@ impl HasViewportPercentage for NoCalcLength {
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impl ToCss for NoCalcLength {
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fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
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match *self {
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NoCalcLength::Absolute(length) => write!(dest, "{}px", length.to_f32_px()),
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NoCalcLength::Absolute(length) => length.to_css(dest),
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NoCalcLength::FontRelative(length) => length.to_css(dest),
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NoCalcLength::ViewportPercentage(length) => length.to_css(dest),
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/* This should only be reached from style dumping code */
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@ -255,7 +363,7 @@ impl Mul<CSSFloat> for NoCalcLength {
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#[inline]
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fn mul(self, scalar: CSSFloat) -> NoCalcLength {
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match self {
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NoCalcLength::Absolute(Au(v)) => NoCalcLength::Absolute(Au(((v as f32) * scalar) as i32)),
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NoCalcLength::Absolute(v) => NoCalcLength::Absolute(v * scalar),
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NoCalcLength::FontRelative(v) => NoCalcLength::FontRelative(v * scalar),
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NoCalcLength::ViewportPercentage(v) => NoCalcLength::ViewportPercentage(v * scalar),
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NoCalcLength::ServoCharacterWidth(_) => panic!("Can't multiply ServoCharacterWidth!"),
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@ -267,13 +375,13 @@ impl NoCalcLength {
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/// Parse a given absolute or relative dimension.
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pub fn parse_dimension(value: CSSFloat, unit: &str) -> Result<NoCalcLength, ()> {
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match_ignore_ascii_case! { unit,
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"px" => Ok(NoCalcLength::Absolute(Au((value * AU_PER_PX) as i32))),
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"in" => Ok(NoCalcLength::Absolute(Au((value * AU_PER_IN) as i32))),
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"cm" => Ok(NoCalcLength::Absolute(Au((value * AU_PER_CM) as i32))),
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"mm" => Ok(NoCalcLength::Absolute(Au((value * AU_PER_MM) as i32))),
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"q" => Ok(NoCalcLength::Absolute(Au((value * AU_PER_Q) as i32))),
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"pt" => Ok(NoCalcLength::Absolute(Au((value * AU_PER_PT) as i32))),
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"pc" => Ok(NoCalcLength::Absolute(Au((value * AU_PER_PC) as i32))),
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"px" => Ok(NoCalcLength::Absolute(AbsoluteLength::Px(value))),
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"in" => Ok(NoCalcLength::Absolute(AbsoluteLength::In(value))),
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"cm" => Ok(NoCalcLength::Absolute(AbsoluteLength::Cm(value))),
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"mm" => Ok(NoCalcLength::Absolute(AbsoluteLength::Mm(value))),
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"q" => Ok(NoCalcLength::Absolute(AbsoluteLength::Q(value))),
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"pt" => Ok(NoCalcLength::Absolute(AbsoluteLength::Pt(value))),
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"pc" => Ok(NoCalcLength::Absolute(AbsoluteLength::Pc(value))),
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// font-relative
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"em" => Ok(NoCalcLength::FontRelative(FontRelativeLength::Em(value))),
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"ex" => Ok(NoCalcLength::FontRelative(FontRelativeLength::Ex(value))),
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@ -291,25 +399,28 @@ impl NoCalcLength {
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#[inline]
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/// Returns a `zero` length.
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pub fn zero() -> NoCalcLength {
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NoCalcLength::Absolute(Au(0))
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NoCalcLength::Absolute(AbsoluteLength::Px(0.))
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}
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#[inline]
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/// Checks whether the length value is zero.
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pub fn is_zero(&self) -> bool {
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*self == NoCalcLength::Absolute(Au(0))
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match *self {
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NoCalcLength::Absolute(length) => length.is_zero(),
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_ => false
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}
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}
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#[inline]
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/// Returns a `medium` length.
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pub fn medium() -> NoCalcLength {
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NoCalcLength::Absolute(Au::from_px(FONT_MEDIUM_PX))
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NoCalcLength::Absolute(AbsoluteLength::Px(FONT_MEDIUM_PX as f32))
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}
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/// Get an absolute length from a px value.
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#[inline]
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pub fn from_px(px_value: CSSFloat) -> NoCalcLength {
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NoCalcLength::Absolute(Au((px_value * AU_PER_PX) as i32))
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NoCalcLength::Absolute(AbsoluteLength::Px(px_value))
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}
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}
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@ -738,8 +849,8 @@ impl CalcLengthOrPercentage {
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match value {
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SimplifiedValueNode::Percentage(p) =>
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percentage = Some(percentage.unwrap_or(0.) + p),
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SimplifiedValueNode::Length(NoCalcLength::Absolute(Au(au))) =>
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absolute = Some(absolute.unwrap_or(0) + au),
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SimplifiedValueNode::Length(NoCalcLength::Absolute(length)) =>
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absolute = Some(absolute.unwrap_or(0.) + Au::from(length).to_f32_px()),
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SimplifiedValueNode::Length(NoCalcLength::ViewportPercentage(v)) =>
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match v {
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ViewportPercentageLength::Vw(val) =>
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@ -768,7 +879,7 @@ impl CalcLengthOrPercentage {
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}
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Ok(CalcLengthOrPercentage {
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absolute: absolute.map(Au),
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absolute: absolute.map(Au::from_f32_px),
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vw: vw,
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vh: vh,
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vmax: vmax,
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@ -1043,7 +1154,7 @@ impl LengthOrPercentage {
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// TODO(emilio): Probably should use Number::parse_non_negative to
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// handle calc()?
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let num = input.expect_number()?;
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Ok(LengthOrPercentage::Length(NoCalcLength::Absolute(Au((AU_PER_PX * num) as i32))))
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Ok(LengthOrPercentage::Length(NoCalcLength::Absolute(AbsoluteLength::Px(num))))
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}
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/// Parse a non-negative length, treating dimensionless numbers as pixels
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@ -1058,7 +1169,7 @@ impl LengthOrPercentage {
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// handle calc()?
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let num = input.expect_number()?;
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if num >= 0. {
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Ok(LengthOrPercentage::Length(NoCalcLength::Absolute(Au((AU_PER_PX * num) as i32))))
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Ok(LengthOrPercentage::Length(NoCalcLength::Absolute(AbsoluteLength::Px(num))))
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} else {
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Err(())
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}
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|
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@ -29,6 +29,7 @@ pub use self::grid::{GridLine, TrackKeyword};
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pub use self::image::{AngleOrCorner, ColorStop, EndingShape as GradientEndingShape, Gradient};
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pub use self::image::{GradientKind, HorizontalDirection, Image, ImageRect, LengthOrKeyword};
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pub use self::image::{LengthOrPercentageOrKeyword, SizeKeyword, VerticalDirection};
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pub use self::length::AbsoluteLength;
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pub use self::length::{FontRelativeLength, ViewportPercentageLength, CharacterWidth, Length, CalcLengthOrPercentage};
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pub use self::length::{Percentage, LengthOrNone, LengthOrNumber, LengthOrPercentage, LengthOrPercentageOrAuto};
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pub use self::length::{LengthOrPercentageOrNone, LengthOrPercentageOrAutoOrContent, NoCalcLength, CalcUnit};
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|
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@ -2,9 +2,13 @@
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use cssparser::Parser;
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use media_queries::CSSErrorReporterTest;
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use parsing::parse;
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use style::parser::Parse;
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use style::parser::{Parse, ParserContext};
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use style::stylesheets::Origin;
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use style::values::specified::length::Length;
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use style_traits::ToCss;
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#[test]
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fn test_calc() {
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@ -13,3 +17,14 @@ fn test_calc() {
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assert!(parse(Length::parse, "calc(1px + 2px )").is_ok());
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assert!(parse(Length::parse, "calc( 1px + 2px)").is_ok());
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}
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#[test]
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fn test_length_literals() {
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assert_roundtrip_with_context!(Length::parse, "0.33px", "0.33px");
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assert_roundtrip_with_context!(Length::parse, "0.33in", "0.33in");
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assert_roundtrip_with_context!(Length::parse, "0.33cm", "0.33cm");
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assert_roundtrip_with_context!(Length::parse, "0.33mm", "0.33mm");
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assert_roundtrip_with_context!(Length::parse, "0.33q", "0.33q");
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assert_roundtrip_with_context!(Length::parse, "0.33pt", "0.33pt");
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assert_roundtrip_with_context!(Length::parse, "0.33pc", "0.33pc");
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}
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|
|
|
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|
|
@ -6,7 +6,7 @@ use app_units::Au;
|
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use style::properties::PropertyDeclaration;
|
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use style::properties::longhands::border_top_width;
|
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use style::values::HasViewportPercentage;
|
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use style::values::specified::{Length, NoCalcLength, ViewportPercentageLength};
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use style::values::specified::{AbsoluteLength, Length, NoCalcLength, ViewportPercentageLength};
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|
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#[test]
|
||||
fn has_viewport_percentage_for_specified_value() {
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|
|
@ -20,7 +20,7 @@ fn has_viewport_percentage_for_specified_value() {
|
|||
|
||||
let pabs = PropertyDeclaration::BorderTopWidth(Box::new(
|
||||
border_top_width::SpecifiedValue::from_length(
|
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Length::NoCalc(NoCalcLength::Absolute(Au(100)))
|
||||
Length::NoCalc(NoCalcLength::Absolute(AbsoluteLength::Px(Au(100).to_f32_px())))
|
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)
|
||||
));
|
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assert!(!pabs.has_viewport_percentage());
|
||||
|
|
|
|||
|
|
@ -5,14 +5,14 @@
|
|||
use app_units::Au;
|
||||
use cssparser::Parser;
|
||||
use style::values::HasViewportPercentage;
|
||||
use style::values::specified::{ViewportPercentageLength, NoCalcLength};
|
||||
use style::values::specified::{AbsoluteLength, ViewportPercentageLength, NoCalcLength};
|
||||
use style::values::specified::length::{CalcLengthOrPercentage, CalcUnit};
|
||||
|
||||
#[test]
|
||||
fn length_has_viewport_percentage() {
|
||||
let l = NoCalcLength::ViewportPercentage(ViewportPercentageLength::Vw(100.));
|
||||
assert!(l.has_viewport_percentage());
|
||||
let l = NoCalcLength::Absolute(Au(100));
|
||||
let l = NoCalcLength::Absolute(AbsoluteLength::Px(Au(100).to_f32_px()));
|
||||
assert!(!l.has_viewport_percentage());
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1,3 +0,0 @@
|
|||
[min-width-001.htm]
|
||||
type: reftest
|
||||
expected: FAIL
|
||||
|
|
@ -3,15 +3,3 @@
|
|||
[uppercase value]
|
||||
expected: FAIL
|
||||
|
||||
[cssText order]
|
||||
expected: FAIL
|
||||
|
||||
[another cssText order (non-alphabetical order)]
|
||||
expected: FAIL
|
||||
|
||||
[whitespaces in value]
|
||||
expected: FAIL
|
||||
|
||||
[invalid property does not appear]
|
||||
expected: FAIL
|
||||
|
||||
|
|
|
|||
|
|
@ -1,3 +0,0 @@
|
|||
[min-width-001.htm]
|
||||
type: reftest
|
||||
expected: FAIL
|
||||
|
|
@ -25196,7 +25196,7 @@
|
|||
"testharness"
|
||||
],
|
||||
"mozilla/calc.html": [
|
||||
"c239c441c90e4d4ed94458eae5b2defabb47e984",
|
||||
"028fc71bdc9a99d552ba552036d38fb4eef11bc1",
|
||||
"testharness"
|
||||
],
|
||||
"mozilla/canvas.initial.reset.2dstate.html": [
|
||||
|
|
|
|||
|
|
@ -41,7 +41,7 @@ var widthTests = [
|
|||
['calc(10px + 10em - 10px)', 'calc(10em + 0px)', '160px'],
|
||||
|
||||
// Fold absolute units
|
||||
['calc(1px + 1pt + 1pc + 1in + 1cm + 1mm)', 'calc(155.88333333333333px)', '155.88333333333333px'],
|
||||
['calc(1px + 1pt + 1pc + 1in + 1cm + 1mm)', 'calc(155.91666666666666px)', '155.91666666666666px'],
|
||||
|
||||
// Alphabetical order
|
||||
['calc(0ch + 0px + 0pt + 0pc + 0in + 0cm + 0mm + 0rem + 0em + 0ex + 0% + 0vw + 0vh + 0vmin + 0vmax)',
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue