Use Servo-specific pseudo element for InlineAbsolute fragment

components/layout/construct.rs

@@ -989,8 +989,9 @@ impl<'a, ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNode>
         let fragment_info = SpecificFragmentInfo::InlineAbsoluteHypothetical(
             InlineAbsoluteHypotheticalFragmentInfo::new(block_flow));
         let style_context = self.style_context();
-        let mut style = node.style(style_context);
+        let style = node.style(style_context);
-        properties::modify_style_for_inline_absolute_hypothetical_fragment(&mut style);
+        let style = style_context.stylist.style_for_anonymous_box(
+            &style_context.guards, &PseudoElement::ServoInlineAbsolute, &style);
         let fragment = Fragment::from_opaque_node_and_style(node.opaque(),
                                                             PseudoElementType::Normal,
                                                             style,

components/style/properties/properties.mako.rs

@@ -2582,17 +2582,6 @@ pub fn modify_style_for_text(style: &mut Arc<ComputedValues>) {
     }
 }
 
-/// Adjusts the `clip` property so that an inline absolute hypothetical fragment
-/// doesn't clip its children.
-#[cfg(feature = "servo")]
-pub fn modify_style_for_inline_absolute_hypothetical_fragment(style: &mut Arc<ComputedValues>) {
-    if !style.get_effects().clip.is_auto() {
-        let mut style = Arc::make_mut(style);
-        let effects_style = Arc::make_mut(&mut style.effects);
-        effects_style.clip = Either::auto()
-    }
-}
-
 #[macro_export]
 macro_rules! css_properties_accessors {
     ($macro_name: ident) => {

components/style/servo/selector_parser.rs

@@ -40,6 +40,7 @@ pub enum PseudoElement {
     ServoAnonymousTableCell,
     ServoAnonymousBlock,
     ServoInlineBlockWrapper,
+    ServoInlineAbsolute,
 }
 
 impl ToCss for PseudoElement {
@@ -59,6 +60,7 @@ impl ToCss for PseudoElement {
             ServoAnonymousTableCell => "::-servo-anonymous-table-cell",
             ServoAnonymousBlock => "::-servo-anonymous-block",
             ServoInlineBlockWrapper => "::-servo-inline-block-wrapper",
+            ServoInlineAbsolute => "::-servo-inline-absolute",
         })
     }
 }
@@ -92,7 +94,8 @@ impl PseudoElement {
             PseudoElement::ServoAnonymousTableRow |
             PseudoElement::ServoAnonymousTableCell |
             PseudoElement::ServoAnonymousBlock |
-            PseudoElement::ServoInlineBlockWrapper => PseudoElementCascadeType::Precomputed,
+            PseudoElement::ServoInlineBlockWrapper |
+            PseudoElement::ServoInlineAbsolute => PseudoElementCascadeType::Precomputed,
         }
     }
 }
@@ -329,6 +332,12 @@ impl<'a> ::selectors::Parser for SelectorParser<'a> {
                 }
                 ServoInlineBlockWrapper
             },
+            "-servo-input-absolute" => {
+                if !self.in_user_agent_stylesheet() {
+                    return Err(())
+                }
+                ServoInlineAbsolute
+            },
             _ => return Err(())
         };
 
@@ -368,6 +377,8 @@ impl SelectorImpl {
         fun(PseudoElement::ServoAnonymousTableRow);
         fun(PseudoElement::ServoAnonymousTableCell);
         fun(PseudoElement::ServoAnonymousBlock);
+        fun(PseudoElement::ServoInlineBlockWrapper);
+        fun(PseudoElement::ServoInlineAbsolute);
     }
 
     /// Returns the pseudo-class state flag for selector matching.

components/style/stylist.rs

@@ -399,7 +399,8 @@ impl Stylist {
             PseudoElement::ServoAnonymousTableRow |
             PseudoElement::ServoAnonymousTableWrapper |
             PseudoElement::ServoTableWrapper |
-            PseudoElement::ServoInlineBlockWrapper => true,
+            PseudoElement::ServoInlineBlockWrapper |
+            PseudoElement::ServoInlineAbsolute => true,
             PseudoElement::Before |
             PseudoElement::After |
             PseudoElement::Selection |

resources/servo.css

@@ -222,3 +222,11 @@ svg > * {
     padding: 0;
     margin: 0;
 }
+
+/* The outer fragment wrapper of an inline absolute hypothetical fragment. */
+*|*::-servo-inline-absolute {
+    clip: auto;
+    border: none;
+    padding: 0;
+    margin: 0;
+}