/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* 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 GFX_FONT_FEATURES_H #define GFX_FONT_FEATURES_H #include "nsTHashtable.h" #include "nsTArray.h" #include "nsString.h" // An OpenType feature tag and value pair struct gfxFontFeature { uint32_t mTag; // see http://www.microsoft.com/typography/otspec/featuretags.htm uint32_t mValue; // 0 = off, 1 = on, larger values may be used as parameters // to features that select among multiple alternatives }; inline bool operator<(const gfxFontFeature& a, const gfxFontFeature& b) { return (a.mTag < b.mTag) || ((a.mTag == b.mTag) && (a.mValue < b.mValue)); } inline bool operator==(const gfxFontFeature& a, const gfxFontFeature& b) { return (a.mTag == b.mTag) && (a.mValue == b.mValue); } struct gfxAlternateValue { uint32_t alternate; // constants in gfxFontConstants.h nsString value; // string value to be looked up }; inline bool operator<(const gfxAlternateValue& a, const gfxAlternateValue& b) { return (a.alternate < b.alternate) || ((a.alternate == b.alternate) && (a.value < b.value)); } inline bool operator==(const gfxAlternateValue& a, const gfxAlternateValue& b) { return (a.alternate == b.alternate) && (a.value == b.value); } class gfxFontFeatureValueSet final { public: NS_INLINE_DECL_REFCOUNTING(gfxFontFeatureValueSet) gfxFontFeatureValueSet(); struct ValueList { ValueList(const nsAString& aName, const nsTArray<uint32_t>& aSelectors) : name(aName), featureSelectors(aSelectors) {} nsString name; nsTArray<uint32_t> featureSelectors; }; struct FeatureValues { uint32_t alternate; nsTArray<ValueList> valuelist; }; // returns true if found, false otherwise bool GetFontFeatureValuesFor(const nsAString& aFamily, uint32_t aVariantProperty, const nsAString& aName, nsTArray<uint32_t>& aValues); void AddFontFeatureValues(const nsAString& aFamily, const nsTArray<gfxFontFeatureValueSet::FeatureValues>& aValues); private: // Private destructor, to discourage deletion outside of Release(): ~gfxFontFeatureValueSet() {} struct FeatureValueHashKey { nsString mFamily; uint32_t mPropVal; nsString mName; FeatureValueHashKey() : mPropVal(0) { } FeatureValueHashKey(const nsAString& aFamily, uint32_t aPropVal, const nsAString& aName) : mFamily(aFamily), mPropVal(aPropVal), mName(aName) { } FeatureValueHashKey(const FeatureValueHashKey& aKey) : mFamily(aKey.mFamily), mPropVal(aKey.mPropVal), mName(aKey.mName) { } }; class FeatureValueHashEntry : public PLDHashEntryHdr { public: typedef const FeatureValueHashKey &KeyType; typedef const FeatureValueHashKey *KeyTypePointer; explicit FeatureValueHashEntry(KeyTypePointer aKey) { } FeatureValueHashEntry(const FeatureValueHashEntry& toCopy) { NS_ERROR("Should not be called"); } ~FeatureValueHashEntry() { } bool KeyEquals(const KeyTypePointer aKey) const; static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; } static PLDHashNumber HashKey(const KeyTypePointer aKey); enum { ALLOW_MEMMOVE = true }; FeatureValueHashKey mKey; nsTArray<uint32_t> mValues; }; nsTHashtable<FeatureValueHashEntry> mFontFeatureValues; }; #endif