style: Adding parsing support for text-decoration-skip-ink

Differential Revision: https://phabricator.services.mozilla.com/D35831

components/style/properties/data.py

@@ -336,6 +336,7 @@ class Longhand(object):
                 "MozScriptLevel",
                 "MozScriptMinSize",
                 "MozScriptSizeMultiplier",
+                "TextDecorationSkipInk",
                 "NonNegativeNumber",
                 "Number",
                 "OffsetRotate",

components/style/properties/longhands/inherited_text.mako.rs

@@ -384,3 +384,15 @@ ${helpers.predefined_type(
     gecko_pref="layout.css.text-underline-offset.enabled",
     spec="https://drafts.csswg.org/css-text-decor-4/#underline-offset",
 )}
+
+// text decoration skip ink
+${helpers.predefined_type(
+    "text-decoration-skip-ink",
+    "TextDecorationSkipInk",
+    "computed::TextDecorationSkipInk::Auto",
+    products="gecko",
+    needs_context=False,
+    animation_value_type="discrete",
+    gecko_pref="layout.css.text-decoration-skip-ink.enabled",
+    spec="https://drafts.csswg.org/css-text-decor-4/#text-decoration-skip-ink-property",
+)}

components/style/values/computed/mod.rs

@@ -78,6 +78,7 @@ pub use self::table::XSpan;
 pub use self::text::{InitialLetter, LetterSpacing, LineBreak, LineHeight};
 pub use self::text::{OverflowWrap, TextOverflow, WordBreak, WordSpacing};
 pub use self::text::{TextAlign, TextEmphasisPosition, TextEmphasisStyle};
+pub use self::text::TextDecorationSkipInk;
 pub use self::time::Time;
 pub use self::transform::{Rotate, Scale, Transform, TransformOperation};
 pub use self::transform::{TransformOrigin, TransformStyle, Translate};

components/style/values/computed/text.rs

@@ -19,7 +19,7 @@ use std::fmt::{self, Write};
 use style_traits::{CssWriter, ToCss};
 
 pub use crate::values::specified::TextAlignKeyword as TextAlign;
-pub use crate::values::specified::TextTransform;
+pub use crate::values::specified::{TextTransform, TextDecorationSkipInk};
 pub use crate::values::specified::{LineBreak, OverflowWrap, WordBreak};
 pub use crate::values::specified::{TextDecorationLine, TextEmphasisPosition};
 

components/style/values/specified/mod.rs

@@ -78,7 +78,7 @@ pub use self::svg::{SVGLength, SVGOpacity, SVGPaint, SVGPaintKind};
 pub use self::svg::{SVGPaintOrder, SVGStrokeDashArray, SVGWidth};
 pub use self::svg_path::SVGPathData;
 pub use self::table::XSpan;
-pub use self::text::TextTransform;
+pub use self::text::{TextTransform, TextDecorationSkipInk};
 pub use self::text::{InitialLetter, LetterSpacing, LineBreak, LineHeight, TextAlign};
 pub use self::text::{OverflowWrap, TextEmphasisPosition, TextEmphasisStyle, WordBreak};
 pub use self::text::{TextAlignKeyword, TextDecorationLine, TextOverflow, WordSpacing};

components/style/values/specified/text.rs

@@ -1054,3 +1054,28 @@ pub enum OverflowWrap {
     BreakWord,
     Anywhere,
 }
+
+/// Implements text-decoration-skip-ink which takes the keywords auto | none
+///
+/// https://drafts.csswg.org/css-text-decor-4/#text-decoration-skip-ink-property
+#[repr(u8)]
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
+#[derive(
+    Clone,
+    Copy,
+    Debug,
+    Eq,
+    MallocSizeOf,
+    Parse,
+    PartialEq,
+    SpecifiedValueInfo,
+    ToComputedValue,
+    ToCss,
+    ToResolvedValue,
+    ToShmem,
+)]
+#[allow(missing_docs)]
+pub enum TextDecorationSkipInk {
+    Auto,
+    None,
+}