Implement TShadowRoot::style_data

components/layout_thread/dom_wrapper.rs

@@ -200,7 +200,12 @@ impl<'sr> TShadowRoot for ServoShadowRoot<'sr> {
     where
         Self: 'a,
     {
-        None
+        Some(unsafe {
+            &self
+                .shadow_root
+                .get_style_data_for_layout::<ServoLayoutElement>()
+                .data
+        })
     }
 }
 

components/script/dom/documentorshadowroot.rs

@@ -18,6 +18,7 @@ use script_traits::UntrustedNodeAddress;
 use servo_arc::Arc;
 use std::fmt;
 use style::context::QuirksMode;
+use style::invalidation::media_queries::{MediaListKey, ToMediaListKey};
 use style::media_queries::MediaList;
 use style::shared_lock::{SharedRwLock as StyleSharedRwLock, SharedRwLockReadGuard};
 use style::stylesheet_set::StylesheetSet;
@@ -43,6 +44,12 @@ impl PartialEq for StyleSheetInDocument {
     }
 }
 
+impl ToMediaListKey for StyleSheetInDocument {
+    fn to_media_list_key(&self) -> MediaListKey {
+        self.sheet.to_media_list_key()
+    }
+}
+
 impl ::style::stylesheets::StylesheetInDocument for StyleSheetInDocument {
     fn origin(&self, guard: &SharedRwLockReadGuard) -> Origin {
         self.sheet.origin(guard)

components/script/dom/shadowroot.rs

@@ -20,6 +20,7 @@ use crate::dom::window::Window;
 use dom_struct::dom_struct;
 use servo_arc::Arc;
 use style::author_styles::AuthorStyles;
+use style::dom::TElement;
 use style::stylesheets::Stylesheet;
 
 // https://dom.spec.whatwg.org/#interface-shadowroot
@@ -29,8 +30,7 @@ pub struct ShadowRoot {
     document_or_shadow_root: DocumentOrShadowRoot,
     document: Dom<Document>,
     host: Dom<Element>,
-    /// List of stylesheets associated with nodes in this shadow tree.
+    /// List of author styles associated with nodes in this shadow tree.
-    /// |None| if the list needs to be refreshed.
     author_styles: DomRefCell<AuthorStyles<StyleSheetInDocument>>,
     stylesheet_list: MutNullableDom<StyleSheetList>,
     window: Dom<Window>,
@@ -119,6 +119,9 @@ impl ShadowRootMethods for ShadowRoot {
 #[allow(unsafe_code)]
 pub trait LayoutShadowRootHelpers {
     unsafe fn get_host_for_layout(&self) -> LayoutDom<Element>;
+    unsafe fn get_style_data_for_layout<'a, E: TElement>(
+        &self,
+    ) -> &'a AuthorStyles<StyleSheetInDocument>;
 }
 
 impl LayoutShadowRootHelpers for LayoutDom<ShadowRoot> {
@@ -127,6 +130,20 @@ impl LayoutShadowRootHelpers for LayoutDom<ShadowRoot> {
     unsafe fn get_host_for_layout(&self) -> LayoutDom<Element> {
         (*self.unsafe_get()).host.to_layout()
     }
+
+    #[inline]
+    #[allow(unsafe_code)]
+    unsafe fn get_style_data_for_layout<'a, E: TElement>(
+        &self,
+    ) -> &'a AuthorStyles<StyleSheetInDocument> {
+        {
+            let mut author_styles = (*self.unsafe_get()).author_styles.borrow_mut_for_layout();
+            // let document = &(*self.unsafe_get()).document;
+            // let guard = document.style_shared_lock().read();
+            // author_styles.flush::<E>(&document.device(), document.quirks_mode(), &guard);
+        }
+        (*self.unsafe_get()).author_styles.borrow_for_layout()
+    }
 }
 
 impl StyleSheetListOwner for Dom<ShadowRoot> {