Auto merge of #10252 - emilio:selection, r=mbrubeck

Implement ::selection pseudo-element

It only supports `color` and `background`, for now, but it shouldn't be hard to add more properties (like text-shadow).

r? @mbrubeck

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1 files changed, 12 insertions, 0 deletions

diff --git a/components/layout/fragment.rs b/components/layout/fragment.rs
index f5f1677ad3d..8a6d8bf1c85 100644
--- a/components/layout/fragment.rs
+++ b/components/layout/fragment.rs
@@ -85,6 +85,9 @@ pub struct Fragment {
     /// The CSS style of this fragment.
     pub style: Arc<ServoComputedValues>,
 
+    /// The CSS style of this fragment when it's selected
+    pub selected_style: Arc<ServoComputedValues>,
+
     /// The position of this fragment relative to its owning flow. The size includes padding and
     /// border, but not margin.
     ///
@@ -798,6 +801,7 @@ impl Fragment {
         Fragment {
             node: node.opaque(),
             style: style,
+            selected_style: node.selected_style().clone(),
             restyle_damage: restyle_damage,
             border_box: LogicalRect::zero(writing_mode),
             border_padding: LogicalMargin::zero(writing_mode),
@@ -815,6 +819,7 @@ impl Fragment {
     pub fn from_opaque_node_and_style(node: OpaqueNode,
                                       pseudo: PseudoElementType<()>,
                                       style: Arc<ServoComputedValues>,
+                                      selected_style: Arc<ServoComputedValues>,
                                       mut restyle_damage: RestyleDamage,
                                       specific: SpecificFragmentInfo)
                                       -> Fragment {
@@ -825,6 +830,7 @@ impl Fragment {
         Fragment {
             node: node,
             style: style,
+            selected_style: selected_style,
             restyle_damage: restyle_damage,
             border_box: LogicalRect::zero(writing_mode),
             border_padding: LogicalMargin::zero(writing_mode),
@@ -858,6 +864,7 @@ impl Fragment {
         Fragment {
             node: self.node,
             style: self.style.clone(),
+            selected_style: self.selected_style.clone(),
             restyle_damage: restyle_damage,
             border_box: new_border_box,
             border_padding: self.border_padding,
@@ -1286,6 +1293,11 @@ impl Fragment {
         &*self.style
     }
 
+    #[inline(always)]
+    pub fn selected_style(&self) -> &ServoComputedValues {
+        &*self.selected_style
+    }
+
     pub fn white_space(&self) -> white_space::T {
         self.style().get_inheritedtext().white_space
     }