Backed out changeset b49d8d47c3f1 (bug 1382078)

dom/xbl/nsBindingManager.cpp

@@ -50,7 +50,6 @@
 #include "nsThreadUtils.h"
 #include "mozilla/dom/NodeListBinding.h"
 #include "mozilla/dom/ScriptSettings.h"
-#include "mozilla/ServoStyleSet.h"
 #include "mozilla/Unused.h"
 
 using namespace mozilla;
@@ -746,59 +745,19 @@ nsBindingManager::MediumFeaturesChanged(nsPresContext* aPresContext)
 {
   bool rulesChanged = false;
   RefPtr<nsPresContext> presContext = aPresContext;
-  bool isStyledByServo = mDocument->IsStyledByServo();
 
   EnumerateBoundContentBindings([=, &rulesChanged](nsXBLBinding* aBinding) {
-    if (isStyledByServo) {
-      ServoStyleSet* styleSet = aBinding->PrototypeBinding()->GetServoStyleSet();
-      if (styleSet) {
-        bool styleSetChanged = false;
-
-        if (styleSet->IsPresContextChanged(presContext)) {
-          styleSetChanged = true;
-        } else {
-          // PresContext is not changed. This means aPresContext is still
-          // alive since the last time it initialized this XBL styleset.
-          // It's safe to check whether medium features changed.
-          bool viewportUnitsUsed = false;
-          styleSetChanged =
-            styleSet->MediumFeaturesChangedRules(&viewportUnitsUsed);
-          MOZ_ASSERT(!viewportUnitsUsed,
-                     "Non-master stylesets shouldn't get flagged as using "
-                     "viewport units!");
-        }
-        rulesChanged = rulesChanged || styleSetChanged;
-      }
-    } else {
-      nsIStyleRuleProcessor* ruleProcessor =
-        aBinding->PrototypeBinding()->GetRuleProcessor();
-      if (ruleProcessor) {
-        bool thisChanged = ruleProcessor->MediumFeaturesChanged(presContext);
-        rulesChanged = rulesChanged || thisChanged;
-      }
+    nsIStyleRuleProcessor* ruleProcessor =
+      aBinding->PrototypeBinding()->GetRuleProcessor();
+    if (ruleProcessor) {
+      bool thisChanged = ruleProcessor->MediumFeaturesChanged(presContext);
+      rulesChanged = rulesChanged || thisChanged;
     }
   });
 
   return rulesChanged;
 }
 
-void
-nsBindingManager::UpdateBoundContentBindingsForServo(nsPresContext* aPresContext)
-{
-  MOZ_ASSERT(mDocument->IsStyledByServo(),
-             "This should be called only by servo-backend!");
-
-  RefPtr<nsPresContext> presContext = aPresContext;
-
-  EnumerateBoundContentBindings([=](nsXBLBinding* aBinding) {
-    nsXBLPrototypeBinding* protoBinding = aBinding->PrototypeBinding();
-    ServoStyleSet* styleSet = protoBinding->GetServoStyleSet();
-    if (styleSet && styleSet->StyleSheetsHaveChanged()) {
-      protoBinding->ComputeServoStyleSet(presContext);
-    }
-  });
-}
-
 void
 nsBindingManager::AppendAllSheets(nsTArray<StyleSheet*>& aArray)
 {

dom/xbl/nsBindingManager.h

@@ -130,17 +130,13 @@ public:
 
   void WalkAllRules(nsIStyleRuleProcessor::EnumFunc aFunc,
                     ElementDependentRuleProcessorData* aData);
-
-  // Do any processing that needs to happen as a result of a change in the
-  // characteristics of the medium, and return whether this rule processor's
-  // rules or the servo style set have changed (e.g., because of media
-  // queries).
+  /**
+   * Do any processing that needs to happen as a result of a change in
+   * the characteristics of the medium, and return whether this rule
+   * processor's rules have changed (e.g., because of media queries).
+   */
   bool MediumFeaturesChanged(nsPresContext* aPresContext);
 
-  // Update the content bindings in mBoundContentSet due to medium features
-  // changed.
-  void UpdateBoundContentBindingsForServo(nsPresContext* aPresContext);
-
   void AppendAllSheets(nsTArray<mozilla::StyleSheet*>& aArray);
 
   void Traverse(nsIContent *aContent,

dom/xbl/nsXBLPrototypeBinding.cpp

@@ -569,14 +569,6 @@ nsXBLPrototypeBinding::GetRuleProcessor()
   return nullptr;
 }
 
-void
-nsXBLPrototypeBinding::ComputeServoStyleSet(nsPresContext* aPresContext)
-{
-  if (mResources) {
-    mResources->ComputeServoStyleSet(aPresContext);
-  }
-}
-
 ServoStyleSet*
 nsXBLPrototypeBinding::GetServoStyleSet() const
 {

dom/xbl/nsXBLPrototypeBinding.h

@@ -131,7 +131,6 @@ public:
   void AppendStyleSheetsTo(nsTArray<mozilla::StyleSheet*>& aResult) const;
 
   nsIStyleRuleProcessor* GetRuleProcessor();
-  void ComputeServoStyleSet(nsPresContext* aPresContext);
   mozilla::ServoStyleSet* GetServoStyleSet() const;
 
   nsresult FlushSkinSheets();

layout/style/ServoStyleSet.cpp

@@ -109,8 +109,6 @@ void
 ServoStyleSet::Init(nsPresContext* aPresContext, nsBindingManager* aBindingManager)
 {
   mPresContext = aPresContext;
-  mPresContextInitXBLStyleSet = aPresContext;
-
   mRawSet.reset(Servo_StyleSet_Init(aPresContext));
   mBindingManager = aBindingManager;
 
@@ -170,15 +168,11 @@ nsRestyleHint
 ServoStyleSet::MediumFeaturesChanged(bool aViewportChanged)
 {
   bool viewportUnitsUsed = false;
-  bool rulesChanged = MediumFeaturesChangedRules(&viewportUnitsUsed);
+  const OriginFlags rulesChanged = static_cast<OriginFlags>(
+    Servo_StyleSet_MediumFeaturesChanged(mRawSet.get(), &viewportUnitsUsed));
 
-  if (mBindingManager &&
-      mBindingManager->MediumFeaturesChanged(mPresContext)) {
-    SetStylistXBLStyleSheetsDirty();
-    rulesChanged = true;
-  }
-
-  if (rulesChanged) {
+  if (rulesChanged != OriginFlags(0)) {
+    MarkOriginsDirty(rulesChanged);
     return eRestyle_Subtree;
   }
 
@@ -189,22 +183,6 @@ ServoStyleSet::MediumFeaturesChanged(bool aViewportChanged)
   return nsRestyleHint(0);
 }
 
-bool
-ServoStyleSet::MediumFeaturesChangedRules(bool* aViewportUnitsUsed)
-{
-  MOZ_ASSERT(aViewportUnitsUsed);
-
-  const OriginFlags rulesChanged = static_cast<OriginFlags>(
-    Servo_StyleSet_MediumFeaturesChanged(mRawSet.get(), aViewportUnitsUsed));
-
-  if (rulesChanged != OriginFlags(0)) {
-    MarkOriginsDirty(rulesChanged);
-    return true;
-  }
-
-  return false;
-}
-
 MOZ_DEFINE_MALLOC_SIZE_OF(ServoStyleSetMallocSizeOf)
 
 void
@@ -1394,21 +1372,13 @@ ServoStyleSet::UpdateStylist()
 {
   MOZ_ASSERT(StylistNeedsUpdate());
 
-  if (mStylistState & StylistState::StyleSheetsDirty) {
-    // There's no need to compute invalidations and such for an XBL styleset,
-    // since they are loaded and unloaded synchronously, and they don't have to
-    // deal with dynamic content changes.
-    Element* root =
-      IsMaster() ? mPresContext->Document()->GetDocumentElement() : nullptr;
-
-    Servo_StyleSet_FlushStyleSheets(mRawSet.get(), root);
-  }
-
-  if (MOZ_UNLIKELY(mStylistState & StylistState::XBLStyleSheetsDirty)) {
-    MOZ_ASSERT(IsMaster(), "Only master styleset can mark XBL stylesets dirty!");
-    mBindingManager->UpdateBoundContentBindingsForServo(mPresContext);
-  }
+  // There's no need to compute invalidations and such for an XBL styleset,
+  // since they are loaded and unloaded synchronously, and they don't have to
+  // deal with dynamic content changes.
+  Element* root =
+    IsMaster() ? mPresContext->Document()->GetDocumentElement() : nullptr;
 
+  Servo_StyleSet_FlushStyleSheets(mRawSet.get(), root);
   mStylistState = StylistState::NotDirty;
 }
 

layout/style/ServoStyleSet.h

@@ -46,22 +46,18 @@ struct TreeMatchContext;
 
 namespace mozilla {
 
-// A few flags used to track which kind of stylist state we may need to
-// update.
+/**
+ * A few flags used to track which kind of stylist state we may need to
+ * update.
+ */
 enum class StylistState : uint8_t {
-  // The stylist is not dirty, we should do nothing.
+  /** The stylist is not dirty, we should do nothing */
   NotDirty = 0,
 
-  // The style sheets have changed, so we need to update the style data.
-  StyleSheetsDirty = 1 << 0,
-
-  // Some of the style sheets of the bound elements in binding manager have
-  // changed, so we need to tell the binding manager to update style data.
-  XBLStyleSheetsDirty = 1 << 1,
+  /** The style sheets have changed, so we need to update the style data. */
+  StyleSheetsDirty,
 };
 
-MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(StylistState)
-
 // Bitfield type to represent Servo stylesheet origins.
 enum class OriginFlags : uint8_t {
   UserAgent = 0x01,
@@ -137,9 +133,6 @@ public:
 
   nsRestyleHint MediumFeaturesChanged(bool aViewportChanged);
 
-  // aViewportChanged outputs whether any viewport units is used.
-  bool MediumFeaturesChangedRules(bool* aViewportUnitsUsed);
-
   void InvalidateStyleForCSSRuleChanges();
 
   void AddSizeOfIncludingThis(nsWindowSizes& aSizes) const;
@@ -440,11 +433,6 @@ public:
     mPresContext = nullptr;
   }
 
-  // Return whether this is the PresContext that initialized us.
-  bool IsPresContextChanged(nsPresContext* aPresContext) const {
-    return aPresContext != mPresContextInitXBLStyleSet;
-  }
-
   /**
    * Returns true if a modification to an an attribute with the specified
    * local name might require us to restyle the element.
@@ -537,12 +525,7 @@ private:
    */
   void SetStylistStyleSheetsDirty()
   {
-    mStylistState |= StylistState::StyleSheetsDirty;
-  }
-
-  void SetStylistXBLStyleSheetsDirty()
-  {
-    mStylistState |= StylistState::XBLStyleSheetsDirty;
+    mStylistState = StylistState::StyleSheetsDirty;
   }
 
   bool StylistNeedsUpdate() const
@@ -582,15 +565,7 @@ private:
                          ServoStyleSheet* aSheet);
 
   const Kind mKind;
-
-  // Nullptr if this is an XBL style set.
-  nsPresContext* MOZ_NON_OWNING_REF mPresContext = nullptr;
-
-  // Because XBL style set could be used by multiple PresContext, we need to
-  // store the PresContext pointer which initializes this style set for
-  // computing medium rule changes.
-  void* MOZ_NON_OWNING_REF mPresContextInitXBLStyleSet = nullptr;
-
+  nsPresContext* mPresContext;
   UniquePtr<RawServoStyleSet> mRawSet;
   EnumeratedArray<SheetType, SheetType::Count,
                   nsTArray<RefPtr<ServoStyleSheet>>> mSheets;

layout/style/test/mochitest.ini

@@ -242,6 +242,7 @@ skip-if = !stylo
 skip-if = android_version == '18' #debug-only failure; timed out #Android 4.3 aws only; bug 1030419
 [test_media_queries_dynamic.html]
 [test_media_queries_dynamic_xbl.html]
+fail-if = stylo # bug 1382078
 [test_media_query_list.html]
 [test_media_query_serialization.html]
 [test_moz_device_pixel_ratio.html]