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style: Update calc() serialization to the spec.
This commit is contained in:
Emilio Cobos Álvarez
parent
d17f27640b
commit
f8a6eccda2
5 changed files with 89 additions and 25 deletions
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@ -11,7 +11,7 @@ use values::CSSFloat;
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use values::animated::ToAnimatedZero;
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/// A computed percentage.
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#[derive(Clone, ComputeSquaredDistance, Copy, Debug, Default, HasViewportPercentage, PartialEq)]
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#[derive(Clone, ComputeSquaredDistance, Copy, Debug, Default, HasViewportPercentage, PartialEq, PartialOrd)]
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#[cfg_attr(feature = "servo", derive(Deserialize, HeapSizeOf, Serialize))]
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pub struct Percentage(pub CSSFloat);
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@ -27,6 +27,12 @@ impl Percentage {
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pub fn hundred() -> Self {
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Percentage(1.)
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}
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/// Returns the absolute value for this percentage.
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#[inline]
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pub fn abs(&self) -> Self {
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Percentage(self.0.abs())
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}
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}
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/// https://drafts.csswg.org/css-transitions/#animtype-percentage
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@ -90,16 +90,24 @@ impl HasViewportPercentage for CalcLengthOrPercentage {
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}
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impl ToCss for CalcLengthOrPercentage {
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/// https://drafts.csswg.org/css-values/#calc-serialize
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#[allow(unused_assignments)]
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fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
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use num_traits::Zero;
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let mut first_value = true;
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macro_rules! first_value_check {
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() => {
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($val:expr) => {
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if !first_value {
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dest.write_str(" + ")?;
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} else {
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first_value = false;
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dest.write_str(if $val < Zero::zero() {
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" - "
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} else {
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" + "
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})?;
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} else if $val < Zero::zero() {
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dest.write_str("-")?;
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}
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first_value = false;
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};
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}
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@ -107,8 +115,8 @@ impl ToCss for CalcLengthOrPercentage {
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( $( $val:ident ),* ) => {
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$(
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if let Some(val) = self.$val {
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first_value_check!();
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val.to_css(dest)?;
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first_value_check!(val);
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val.abs().to_css(dest)?;
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dest.write_str(stringify!($val))?;
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}
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)*
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@ -117,7 +125,9 @@ impl ToCss for CalcLengthOrPercentage {
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dest.write_str("calc(")?;
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serialize!(ch, em, ex, rem, vh, vmax, vmin, vw);
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// NOTE(emilio): The order here it's very intentional, and alphabetic
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// per the spec linked above.
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serialize!(ch, em, ex);
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#[cfg(feature = "gecko")]
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{
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@ -125,16 +135,20 @@ impl ToCss for CalcLengthOrPercentage {
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}
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if let Some(val) = self.absolute {
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first_value_check!();
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val.to_css(dest)?;
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first_value_check!(val);
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// FIXME(emilio): Au::abs() would be nice.
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let abs = if val < Zero::zero() { -val } else { val };
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abs.to_css(dest)?;
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}
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serialize!(rem, vh, vmax, vmin, vw);
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if let Some(val) = self.percentage {
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first_value_check!();
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val.to_css(dest)?;
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first_value_check!(val.0);
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val.abs().to_css(dest)?;
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}
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write!(dest, ")")
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dest.write_str(")")
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}
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}
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@ -13512,6 +13512,12 @@
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{}
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]
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],
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"css/calc-serialization.html": [
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[
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"/_mozilla/css/calc-serialization.html",
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{}
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]
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],
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"css/empty-keyframes.html": [
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[
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"/_mozilla/css/empty-keyframes.html",
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@ -22847,6 +22853,10 @@
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"b9e77c824d0c96e51d51fb8f1e923d3ab67be027",
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"testharness"
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],
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"css/calc-serialization.html": [
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"628597eb36bf21a1ec982c7f6935ee7949c62044",
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"testharness"
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],
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"css/canvas_as_block_element_a.html": [
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"668d93da2dab9722998cc7c5785c20e2ab9a1ced",
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"reftest"
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@ -26508,7 +26518,7 @@
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"testharness"
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],
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"mozilla/calc.html": [
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"5d59d5b367a023e778ce6968acdeca6b8b7c3197",
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"5b3ea33205a9f2404bd6976a2c7f6fc451be8e96",
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"testharness"
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],
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"mozilla/canvas.initial.reset.2dstate.html": [
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34
tests/wpt/mozilla/tests/css/calc-serialization.html
Normal file
34
tests/wpt/mozilla/tests/css/calc-serialization.html
Normal file
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@ -0,0 +1,34 @@
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<!doctype html>
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<meta charset="utf-8">
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<title>CSS Values and Units: calc() serialization.</title>
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<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@mozilla.com">
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<link rel="help" href="https://drafts.csswg.org/css-values/#calc-serialize">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<!-- FIXME(emilio): Upstream when spec stops being under discussion -->
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<div id="content"></div>
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<script>
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// NOTE(emilio): This intentionally doesn't test for order of percentages
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// because of:
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//
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// https://github.com/w3c/csswg-drafts/issues/1731
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test(function() {
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// specified -> expected
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var values = {
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"calc(10px + 1vmin)": "calc(10px + 1vmin)",
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"calc(10px + 1em)": "calc(1em + 10px)",
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"calc(1vmin - 10px)": "calc(-10px + 1vmin)",
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"calc(-10px + 1em)": "calc(1em - 10px)",
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"calc(-10px)": "calc(-10px)",
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};
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var content = document.getElementById("content");
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for (var prop in values) {
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content.style.width = prop;
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assert_equals(content.style.width, values[prop], "Serialization of " + prop);
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}
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}, "calc() serialization")
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</script>
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@ -46,13 +46,13 @@ var widthTests = [
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// Alphabetical order
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['calc(0ch + 0px + 0pt + 0pc + 0in + 0cm + 0mm + 0rem + 0em + 0ex + 0% + 0vw + 0vh + 0vmin + 0vmax)',
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'calc(0ch + 0em + 0ex + 0rem + 0vh + 0vmax + 0vmin + 0vw + 0px + 0%)',
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'calc(0% + 0ch + 0em + 0ex + 0px + 0rem + 0vh + 0vmax + 0vmin + 0vw)',
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'0px'],
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// Simplification
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['calc((2 - 1) * 10px)', 'calc(10px)', '10px'],
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['calc(((3 - 1) * (8 + 4)) * 10px)', 'calc(240px)', '240px'],
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['calc(5 * (20px / 2 + 7 * (3em + 12px/4 + (8 - 2) * 2rem)))', 'calc(105em + 420rem + 155px)', '8555px'],
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['calc(5 * (20px / 2 + 7 * (3em + 12px/4 + (8 - 2) * 2rem)))', 'calc(105em + 155px + 420rem)', '8555px'],
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];
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@ -107,7 +107,7 @@ var lengthOrPercentageProperties = [
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lengthOrPercentageProperties.forEach(function(prop) {
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test(function() {
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div.style.setProperty(prop, 'calc(1px + 0%)');
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assert_equals(div.style.getPropertyValue(prop), 'calc(1px + 0%)');
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assert_equals(div.style.getPropertyValue(prop), 'calc(0% + 1px)');
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}, 'calc for ' + prop);
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});
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@ -142,14 +142,14 @@ numberProperties.forEach(function(prop) {
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var otherProperties = [
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['border-width', 'calc(1px)', 'calc(1px)'],
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['border-spacing', 'calc(1px)', 'calc(1px)'],
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['transform-origin', 'calc(1px + 0%)', 'calc(1px + 0%) center 0px'],
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['perspective-origin', 'calc(1px + 0%)', 'calc(1px + 0%) center'],
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['background-size', 'calc(1px + 0%)', 'calc(1px + 0%) auto'],
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['background-position', 'calc(1px + 0%) calc(2px + 0%)', 'calc(1px + 0%) calc(2px + 0%)'],
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['border-top-left-radius', 'calc(1px + 0%)', 'calc(1px + 0%) calc(1px + 0%)'],
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['border-bottom-left-radius', 'calc(1px + 0%)', 'calc(1px + 0%) calc(1px + 0%)'],
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['border-top-right-radius', 'calc(1px + 0%)', 'calc(1px + 0%) calc(1px + 0%)'],
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['border-bottom-right-radius', 'calc(1px + 0%)', 'calc(1px + 0%) calc(1px + 0%)'],
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['transform-origin', 'calc(1px + 0%)', 'calc(0% + 1px) center 0px'],
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['perspective-origin', 'calc(1px + 0%)', 'calc(0% + 1px) center'],
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['background-size', 'calc(1px + 0%)', 'calc(0% + 1px) auto'],
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['background-position', 'calc(1px + 0%) calc(2px + 0%)', 'calc(0% + 1px) calc(0% + 2px)'],
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['border-top-left-radius', 'calc(1px + 0%)', 'calc(0% + 1px) calc(0% + 1px)'],
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['border-bottom-left-radius', 'calc(1px + 0%)', 'calc(0% + 1px) calc(0% + 1px)'],
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['border-top-right-radius', 'calc(1px + 0%)', 'calc(0% + 1px) calc(0% + 1px)'],
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['border-bottom-right-radius', 'calc(1px + 0%)', 'calc(0% + 1px) calc(0% + 1px)'],
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['counter-increment', 'foo calc(1 + 1)', 'foo calc(2)'],
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];
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