| /* |
| * Copyright (C) 2000 Lars Knoll (knoll@kde.org) |
| * (C) 2000 Antti Koivisto (koivisto@kde.org) |
| * (C) 2000 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights |
| * reserved. |
| * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com) |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_CONTENT_DATA_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_CONTENT_DATA_H_ |
| |
| #include <memory> |
| #include <utility> |
| |
| #include "third_party/blink/renderer/core/style/computed_style_constants.h" |
| #include "third_party/blink/renderer/core/style/style_image.h" |
| #include "third_party/blink/renderer/platform/heap/heap.h" |
| #include "third_party/blink/renderer/platform/wtf/casting.h" |
| #include "third_party/blink/renderer/platform/wtf/text/atomic_string.h" |
| |
| namespace blink { |
| |
| class ComputedStyle; |
| class LayoutObject; |
| enum class LegacyLayout; |
| class PseudoElement; |
| class TreeScope; |
| |
| class ContentData : public GarbageCollected<ContentData> { |
| public: |
| virtual ~ContentData() = default; |
| |
| virtual bool IsCounter() const { return false; } |
| virtual bool IsImage() const { return false; } |
| virtual bool IsQuote() const { return false; } |
| virtual bool IsText() const { return false; } |
| virtual bool IsAltText() const { return false; } |
| virtual bool IsNone() const { return false; } |
| |
| virtual LayoutObject* CreateLayoutObject(PseudoElement&, |
| const ComputedStyle&, |
| LegacyLayout) const = 0; |
| |
| virtual ContentData* Clone() const; |
| |
| ContentData* Next() const { return next_.Get(); } |
| void SetNext(ContentData* next) { |
| DCHECK(!IsNone()); |
| DCHECK(!next || !next->IsNone()); |
| next_ = next; |
| } |
| |
| virtual bool Equals(const ContentData&) const = 0; |
| |
| virtual void Trace(Visitor*) const; |
| |
| private: |
| virtual ContentData* CloneInternal() const = 0; |
| |
| Member<ContentData> next_; |
| }; |
| |
| class ImageContentData final : public ContentData { |
| friend class ContentData; |
| |
| public: |
| explicit ImageContentData(StyleImage* image) : image_(image) { |
| DCHECK(image_); |
| } |
| |
| const StyleImage* GetImage() const { return image_.Get(); } |
| StyleImage* GetImage() { return image_.Get(); } |
| void SetImage(StyleImage* image) { |
| DCHECK(image); |
| image_ = image; |
| } |
| |
| bool IsImage() const override { return true; } |
| LayoutObject* CreateLayoutObject(PseudoElement&, |
| const ComputedStyle&, |
| LegacyLayout) const override; |
| |
| bool Equals(const ContentData& data) const override { |
| if (!data.IsImage()) |
| return false; |
| return *static_cast<const ImageContentData&>(data).GetImage() == |
| *GetImage(); |
| } |
| |
| void Trace(Visitor*) const override; |
| |
| private: |
| ContentData* CloneInternal() const override { |
| StyleImage* image = const_cast<StyleImage*>(this->GetImage()); |
| return MakeGarbageCollected<ImageContentData>(image); |
| } |
| |
| Member<StyleImage> image_; |
| }; |
| |
| template <> |
| struct DowncastTraits<ImageContentData> { |
| static bool AllowFrom(const ContentData& content) { |
| return content.IsImage(); |
| } |
| }; |
| |
| class TextContentData final : public ContentData { |
| friend class ContentData; |
| |
| public: |
| explicit TextContentData(const String& text) : text_(text) {} |
| |
| const String& GetText() const { return text_; } |
| void SetText(const String& text) { text_ = text; } |
| |
| bool IsText() const override { return true; } |
| LayoutObject* CreateLayoutObject(PseudoElement&, |
| const ComputedStyle&, |
| LegacyLayout) const override; |
| |
| bool Equals(const ContentData& data) const override { |
| if (!data.IsText()) |
| return false; |
| return static_cast<const TextContentData&>(data).GetText() == GetText(); |
| } |
| |
| private: |
| ContentData* CloneInternal() const override { |
| return MakeGarbageCollected<TextContentData>(GetText()); |
| } |
| |
| String text_; |
| }; |
| |
| template <> |
| struct DowncastTraits<TextContentData> { |
| static bool AllowFrom(const ContentData& content) { return content.IsText(); } |
| }; |
| |
| class AltTextContentData final : public ContentData { |
| friend class ContentData; |
| |
| public: |
| explicit AltTextContentData(const String& text) : text_(text) {} |
| |
| String GetText() const { return text_; } |
| void SetText(const String& text) { text_ = text; } |
| |
| bool IsAltText() const override { return true; } |
| LayoutObject* CreateLayoutObject(PseudoElement&, |
| const ComputedStyle&, |
| LegacyLayout) const override; |
| |
| bool Equals(const ContentData& data) const override { |
| if (!data.IsAltText()) |
| return false; |
| return static_cast<const AltTextContentData&>(data).GetText() == GetText(); |
| } |
| |
| private: |
| ContentData* CloneInternal() const override { |
| return MakeGarbageCollected<AltTextContentData>(GetText()); |
| } |
| String text_; |
| }; |
| |
| template <> |
| struct DowncastTraits<AltTextContentData> { |
| static bool AllowFrom(const ContentData& content) { |
| return content.IsAltText(); |
| } |
| }; |
| |
| class CounterContentData final : public ContentData { |
| friend class ContentData; |
| |
| public: |
| explicit CounterContentData(const AtomicString& identifier, |
| const AtomicString& style, |
| const AtomicString& separator, |
| const TreeScope* tree_scope) |
| : identifier_(identifier), |
| list_style_(style), |
| separator_(separator), |
| tree_scope_(tree_scope) {} |
| |
| bool IsCounter() const override { return true; } |
| LayoutObject* CreateLayoutObject(PseudoElement&, |
| const ComputedStyle&, |
| LegacyLayout) const override; |
| |
| const AtomicString& Identifier() const { return identifier_; } |
| const AtomicString& ListStyle() const { return list_style_; } |
| const AtomicString& Separator() const { return separator_; } |
| const TreeScope* GetTreeScope() const { return tree_scope_; } |
| |
| EListStyleType ToDeprecatedListStyleTypeEnum() const; |
| |
| void Trace(Visitor*) const override; |
| |
| private: |
| ContentData* CloneInternal() const override { |
| return MakeGarbageCollected<CounterContentData>(identifier_, list_style_, |
| separator_, tree_scope_); |
| } |
| |
| bool Equals(const ContentData& data) const override { |
| if (!data.IsCounter()) |
| return false; |
| const CounterContentData& other = |
| static_cast<const CounterContentData&>(data); |
| return Identifier() == other.Identifier() && |
| ListStyle() == other.ListStyle() && |
| Separator() == other.Separator() && |
| GetTreeScope() == other.GetTreeScope(); |
| } |
| |
| AtomicString identifier_; |
| AtomicString list_style_; |
| AtomicString separator_; |
| Member<const TreeScope> tree_scope_; |
| }; |
| |
| template <> |
| struct DowncastTraits<CounterContentData> { |
| static bool AllowFrom(const ContentData& content) { |
| return content.IsCounter(); |
| } |
| }; |
| |
| class QuoteContentData final : public ContentData { |
| friend class ContentData; |
| |
| public: |
| explicit QuoteContentData(QuoteType quote) : quote_(quote) {} |
| |
| QuoteType Quote() const { return quote_; } |
| void SetQuote(QuoteType quote) { quote_ = quote; } |
| |
| bool IsQuote() const override { return true; } |
| LayoutObject* CreateLayoutObject(PseudoElement&, |
| const ComputedStyle&, |
| LegacyLayout) const override; |
| |
| bool Equals(const ContentData& data) const override { |
| if (!data.IsQuote()) |
| return false; |
| return static_cast<const QuoteContentData&>(data).Quote() == Quote(); |
| } |
| |
| private: |
| ContentData* CloneInternal() const override { |
| return MakeGarbageCollected<QuoteContentData>(Quote()); |
| } |
| |
| QuoteType quote_; |
| }; |
| |
| template <> |
| struct DowncastTraits<QuoteContentData> { |
| static bool AllowFrom(const ContentData& content) { |
| return content.IsQuote(); |
| } |
| }; |
| |
| class NoneContentData final : public ContentData { |
| friend class ContentData; |
| |
| public: |
| explicit NoneContentData() {} |
| |
| bool IsNone() const override { return true; } |
| LayoutObject* CreateLayoutObject(PseudoElement&, |
| const ComputedStyle&, |
| LegacyLayout) const override; |
| |
| bool Equals(const ContentData& data) const override { return data.IsNone(); } |
| |
| private: |
| ContentData* CloneInternal() const override { |
| return MakeGarbageCollected<NoneContentData>(); |
| } |
| }; |
| |
| template <> |
| struct DowncastTraits<NoneContentData> { |
| static bool AllowFrom(const ContentData& content) { return content.IsNone(); } |
| }; |
| |
| inline bool operator==(const ContentData& a, const ContentData& b) { |
| const ContentData* ptr_a = &a; |
| const ContentData* ptr_b = &b; |
| |
| while (ptr_a && ptr_b && ptr_a->Equals(*ptr_b)) { |
| ptr_a = ptr_a->Next(); |
| ptr_b = ptr_b->Next(); |
| } |
| |
| return !ptr_a && !ptr_b; |
| } |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_CONTENT_DATA_H_ |