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Diffstat (limited to 'layout/style/CounterStyleManager.h')
| -rw-r--r-- | layout/style/CounterStyleManager.h | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/layout/style/CounterStyleManager.h b/layout/style/CounterStyleManager.h new file mode 100644 index 000000000..2f760f340 --- /dev/null +++ b/layout/style/CounterStyleManager.h @@ -0,0 +1,192 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ +#ifndef mozilla_CounterStyleManager_h_ +#define mozilla_CounterStyleManager_h_ + +#include "nsStringFwd.h" +#include "nsRefPtrHashtable.h" +#include "nsHashKeys.h" + +#include "nsStyleConsts.h" + +#include "mozilla/Attributes.h" + +#include "nsCSSValue.h" + +class nsPresContext; + +namespace mozilla { + +class WritingMode; + +typedef int32_t CounterValue; + +class CounterStyleManager; +class AnonymousCounterStyle; + +struct NegativeType; +struct PadType; + +class CounterStyle +{ +protected: + explicit constexpr CounterStyle(int32_t aStyle) + : mStyle(aStyle) + { + } + +private: + CounterStyle(const CounterStyle& aOther) = delete; + void operator=(const CounterStyle& other) = delete; + +public: + int32_t GetStyle() const { return mStyle; } + bool IsNone() const { return mStyle == NS_STYLE_LIST_STYLE_NONE; } + bool IsCustomStyle() const { return mStyle == NS_STYLE_LIST_STYLE_CUSTOM; } + // A style is dependent if it depends on the counter style manager. + // Custom styles are certainly dependent. In addition, some builtin + // styles are dependent for fallback. + bool IsDependentStyle() const; + + virtual void GetStyleName(nsSubstring& aResult) = 0; + virtual void GetPrefix(nsSubstring& aResult) = 0; + virtual void GetSuffix(nsSubstring& aResult) = 0; + void GetCounterText(CounterValue aOrdinal, + WritingMode aWritingMode, + nsSubstring& aResult, + bool& aIsRTL); + virtual void GetSpokenCounterText(CounterValue aOrdinal, + WritingMode aWritingMode, + nsSubstring& aResult, + bool& aIsBullet); + + // XXX This method could be removed once ::-moz-list-bullet and + // ::-moz-list-number are completely merged into ::marker. + virtual bool IsBullet() = 0; + + virtual void GetNegative(NegativeType& aResult) = 0; + /** + * This method returns whether an ordinal is in the range of this + * counter style. Note that, it is possible that an ordinal in range + * is rejected by the generating algorithm. + */ + virtual bool IsOrdinalInRange(CounterValue aOrdinal) = 0; + /** + * This method returns whether an ordinal is in the default range of + * this counter style. This is the effective range when no 'range' + * descriptor is specified. + */ + virtual bool IsOrdinalInAutoRange(CounterValue aOrdinal) = 0; + virtual void GetPad(PadType& aResult) = 0; + virtual CounterStyle* GetFallback() = 0; + virtual uint8_t GetSpeakAs() = 0; + virtual bool UseNegativeSign() = 0; + + virtual void CallFallbackStyle(CounterValue aOrdinal, + WritingMode aWritingMode, + nsSubstring& aResult, + bool& aIsRTL); + virtual bool GetInitialCounterText(CounterValue aOrdinal, + WritingMode aWritingMode, + nsSubstring& aResult, + bool& aIsRTL) = 0; + + virtual AnonymousCounterStyle* AsAnonymous() { return nullptr; } + + NS_IMETHOD_(MozExternalRefCountType) AddRef() = 0; + NS_IMETHOD_(MozExternalRefCountType) Release() = 0; + +protected: + int32_t mStyle; +}; + +class AnonymousCounterStyle final : public CounterStyle +{ +public: + explicit AnonymousCounterStyle(const nsSubstring& aContent); + explicit AnonymousCounterStyle(const nsCSSValue::Array* aValue); + + virtual void GetStyleName(nsAString& aResult) override; + virtual void GetPrefix(nsAString& aResult) override; + virtual void GetSuffix(nsAString& aResult) override; + virtual bool IsBullet() override; + + virtual void GetNegative(NegativeType& aResult) override; + virtual bool IsOrdinalInRange(CounterValue aOrdinal) override; + virtual bool IsOrdinalInAutoRange(CounterValue aOrdinal) override; + virtual void GetPad(PadType& aResult) override; + virtual CounterStyle* GetFallback() override; + virtual uint8_t GetSpeakAs() override; + virtual bool UseNegativeSign() override; + + virtual bool GetInitialCounterText(CounterValue aOrdinal, + WritingMode aWritingMode, + nsSubstring& aResult, + bool& aIsRTL) override; + + virtual AnonymousCounterStyle* AsAnonymous() override { return this; } + + bool IsSingleString() const { return mSingleString; } + uint8_t GetSystem() const { return mSystem; } + const nsTArray<nsString>& GetSymbols() const { return mSymbols; } + + NS_INLINE_DECL_REFCOUNTING(AnonymousCounterStyle, override) + +private: + ~AnonymousCounterStyle() {} + + bool mSingleString; + uint8_t mSystem; + nsTArray<nsString> mSymbols; +}; + +class CounterStyleManager final +{ +private: + ~CounterStyleManager(); +public: + explicit CounterStyleManager(nsPresContext* aPresContext); + + static void InitializeBuiltinCounterStyles(); + + void Disconnect(); + + bool IsInitial() const + { + // only 'none' and 'decimal' + return mCacheTable.Count() == 2; + } + + CounterStyle* BuildCounterStyle(const nsSubstring& aName); + + static CounterStyle* GetBuiltinStyle(int32_t aStyle); + static CounterStyle* GetNoneStyle() + { + return GetBuiltinStyle(NS_STYLE_LIST_STYLE_NONE); + } + static CounterStyle* GetDecimalStyle() + { + return GetBuiltinStyle(NS_STYLE_LIST_STYLE_DECIMAL); + } + + // This method will scan all existing counter styles generated by this + // manager, and remove or mark data dirty accordingly. It returns true + // if any counter style is changed, false elsewise. This method should + // be called when any counter style may be affected. + bool NotifyRuleChanged(); + + nsPresContext* PresContext() const { return mPresContext; } + + NS_INLINE_DECL_REFCOUNTING(CounterStyleManager) + +private: + nsPresContext* mPresContext; + nsRefPtrHashtable<nsStringHashKey, CounterStyle> mCacheTable; +}; + +} // namespace mozilla + +#endif /* !defined(mozilla_CounterStyleManager_h_) */ |