Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #ifndef mozilla_ServoStyleContext_h
       8             : #define mozilla_ServoStyleContext_h
       9             : 
      10             : #include "nsStyleContext.h"
      11             : 
      12             : namespace mozilla {
      13             : 
      14             : class ServoStyleContext final : public nsStyleContext {
      15             : public:
      16             : 
      17             :   static already_AddRefed<ServoStyleContext>
      18             :   Create(nsStyleContext* aParentContext,
      19             :          nsPresContext* aPresContext,
      20             :          nsIAtom* aPseudoTag,
      21             :          mozilla::CSSPseudoElementType aPseudoType,
      22             :          already_AddRefed<ServoComputedValues> aComputedValues);
      23             : 
      24             :   ServoStyleContext(nsStyleContext* aParent,
      25             :                     nsPresContext* aPresContext,
      26             :                     nsIAtom* aPseudoTag,
      27             :                     CSSPseudoElementType aPseudoType,
      28             :                     already_AddRefed<ServoComputedValues> aComputedValues);
      29             : 
      30           0 :   nsPresContext* PresContext() const {
      31           0 :     return mPresContext;
      32             :   }
      33             : 
      34           0 :   ServoComputedValues* ComputedValues() const {
      35           0 :     return mSource;
      36             :   }
      37           0 :   ~ServoStyleContext() {
      38           0 :     Destructor();
      39           0 :   }
      40             : 
      41             :   /**
      42             :    * Makes this context match |aOther| in terms of which style structs have
      43             :    * been resolved.
      44             :    */
      45           0 :   void ResolveSameStructsAs(nsPresContext* aPresContext, ServoStyleContext* aOther) {
      46             :     // NB: This function is only called on newly-minted style contexts, but
      47             :     // those may already have resolved style structs given the SetStyleBits call
      48             :     // in FinishConstruction. So we carefully xor out the bits that are new so
      49             :     // that we don't call FinishStyle twice.
      50           0 :     uint64_t ourBits = mBits & NS_STYLE_INHERIT_MASK;
      51           0 :     uint64_t otherBits = aOther->mBits & NS_STYLE_INHERIT_MASK;
      52           0 :     MOZ_ASSERT((otherBits | ourBits) == otherBits, "otherBits should be a superset");
      53           0 :     uint64_t newBits = (ourBits ^ otherBits) & NS_STYLE_INHERIT_MASK;
      54             : 
      55             : #define STYLE_STRUCT(name_, checkdata_cb)                                             \
      56             :     if (nsStyle##name_::kHasFinishStyle && newBits & NS_STYLE_INHERIT_BIT(name_)) {   \
      57             :       const nsStyle##name_* data = Servo_GetStyle##name_(ComputedValues());           \
      58             :       const_cast<nsStyle##name_*>(data)->FinishStyle(aPresContext);                   \
      59             :     }
      60             : #include "nsStyleStructList.h"
      61             : #undef STYLE_STRUCT
      62             : 
      63           0 :     mBits |= newBits;
      64           0 :   }
      65             : 
      66             : private:
      67             :   nsPresContext* mPresContext;
      68             :   RefPtr<ServoComputedValues> mSource;
      69             : };
      70             : 
      71             : }
      72             : 
      73             : #endif // mozilla_ServoStyleContext_h