tor-browser

The Tor Browser
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CachedInheritingStyles.cpp (2122B)

      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 #include "mozilla/CachedInheritingStyles.h"
      8 
      9 #include "mozilla/ComputedStyle.h"
     10 #include "nsCOMPtr.h"
     11 #include "nsWindowSizes.h"
     12 
     13 namespace mozilla {
     14 
     15 void CachedInheritingStyles::Insert(ComputedStyle* aStyle) {
     16  MOZ_ASSERT(aStyle);
     17  MOZ_ASSERT(aStyle->IsInheritingAnonBox() ||
     18             aStyle->IsLazilyCascadedPseudoElement());
     19 
     20  if (IsEmpty()) {
     21    RefPtr<ComputedStyle> s = aStyle;
     22    mBits = reinterpret_cast<uintptr_t>(s.forget().take());
     23    MOZ_ASSERT(!IsEmpty() && !IsIndirect());
     24  } else if (IsIndirect()) {
     25    AsIndirect()->AppendElement(aStyle);
     26  } else {
     27    IndirectCache* cache = new IndirectCache();
     28    cache->AppendElement(dont_AddRef(AsDirect()));
     29    cache->AppendElement(aStyle);
     30    mBits = reinterpret_cast<uintptr_t>(cache) | 1;
     31    MOZ_ASSERT(IsIndirect());
     32  }
     33 }
     34 
     35 ComputedStyle* CachedInheritingStyles::Lookup(PseudoStyleType aType) const {
     36  MOZ_ASSERT(PseudoStyle::IsPseudoElement(aType) ||
     37             PseudoStyle::IsInheritingAnonBox(aType));
     38  if (IsIndirect()) {
     39    for (auto& style : *AsIndirect()) {
     40      if (style->GetPseudoType() == aType) {
     41        return style;
     42      }
     43    }
     44 
     45    return nullptr;
     46  }
     47 
     48  ComputedStyle* direct = AsDirect();
     49  return direct && direct->GetPseudoType() == aType ? direct : nullptr;
     50 }
     51 
     52 void CachedInheritingStyles::AddSizeOfIncludingThis(nsWindowSizes& aSizes,
     53                                                    size_t* aCVsSize) const {
     54  if (IsIndirect()) {
     55    for (auto& style : *AsIndirect()) {
     56      if (!aSizes.mState.HaveSeenPtr(style)) {
     57        style->AddSizeOfIncludingThis(aSizes, aCVsSize);
     58      }
     59    }
     60 
     61    return;
     62  }
     63 
     64  ComputedStyle* direct = AsDirect();
     65  if (direct && !aSizes.mState.HaveSeenPtr(direct)) {
     66    direct->AddSizeOfIncludingThis(aSizes, aCVsSize);
     67  }
     68 }
     69 
     70 }  // namespace mozilla