| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_DOM_PSEUDO_ELEMENT_DATA_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_PSEUDO_ELEMENT_DATA_H_ |
| |
| #include "base/macros.h" |
| #include "build/build_config.h" |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| |
| namespace blink { |
| |
| class PseudoElementData final : public GarbageCollected<PseudoElementData> { |
| public: |
| static PseudoElementData* Create(); |
| void SetPseudoElement(PseudoId, PseudoElement*); |
| PseudoElement* GetPseudoElement(PseudoId) const; |
| bool HasPseudoElements() const; |
| void ClearPseudoElements(); |
| void Trace(blink::Visitor* visitor) { |
| visitor->Trace(generated_before_); |
| visitor->Trace(generated_after_); |
| visitor->Trace(generated_first_letter_); |
| visitor->Trace(backdrop_); |
| } |
| |
| private: |
| PseudoElementData() = default; |
| Member<PseudoElement> generated_before_; |
| Member<PseudoElement> generated_after_; |
| Member<PseudoElement> generated_first_letter_; |
| Member<PseudoElement> backdrop_; |
| DISALLOW_COPY_AND_ASSIGN(PseudoElementData); |
| }; |
| |
| inline PseudoElementData* PseudoElementData::Create() { |
| return new PseudoElementData(); |
| } |
| |
| inline bool PseudoElementData::HasPseudoElements() const { |
| return generated_before_ || generated_after_ || backdrop_ || |
| generated_first_letter_; |
| } |
| |
| inline void PseudoElementData::ClearPseudoElements() { |
| SetPseudoElement(kPseudoIdBefore, nullptr); |
| SetPseudoElement(kPseudoIdAfter, nullptr); |
| SetPseudoElement(kPseudoIdBackdrop, nullptr); |
| SetPseudoElement(kPseudoIdFirstLetter, nullptr); |
| } |
| |
| inline void PseudoElementData::SetPseudoElement(PseudoId pseudo_id, |
| PseudoElement* element) { |
| switch (pseudo_id) { |
| case kPseudoIdBefore: |
| if (generated_before_) |
| generated_before_->Dispose(); |
| generated_before_ = element; |
| break; |
| case kPseudoIdAfter: |
| if (generated_after_) |
| generated_after_->Dispose(); |
| generated_after_ = element; |
| break; |
| case kPseudoIdBackdrop: |
| if (backdrop_) |
| backdrop_->Dispose(); |
| backdrop_ = element; |
| break; |
| case kPseudoIdFirstLetter: |
| if (generated_first_letter_) |
| generated_first_letter_->Dispose(); |
| generated_first_letter_ = element; |
| break; |
| default: |
| NOTREACHED(); |
| } |
| } |
| |
| inline PseudoElement* PseudoElementData::GetPseudoElement( |
| PseudoId pseudo_id) const { |
| if (kPseudoIdBefore == pseudo_id) |
| return generated_before_; |
| if (kPseudoIdAfter == pseudo_id) |
| return generated_after_; |
| // Workaround for CPU bug. This avoids compiler optimizing |
| // this group of if conditions into switch. See http://crbug.com/855390. |
| #if defined(ARCH_CPU_ARMEL) |
| __asm__ volatile(""); |
| #endif |
| if (kPseudoIdBackdrop == pseudo_id) |
| return backdrop_; |
| if (kPseudoIdFirstLetter == pseudo_id) |
| return generated_first_letter_; |
| return nullptr; |
| } |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_PSEUDO_ELEMENT_DATA_H_ |