1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/thebes/gfxFontFeatures.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,126 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.8 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef GFX_FONT_FEATURES_H
1.11 +#define GFX_FONT_FEATURES_H
1.12 +
1.13 +#include "nsTHashtable.h"
1.14 +#include "nsTArray.h"
1.15 +#include "nsString.h"
1.16 +
1.17 +// An OpenType feature tag and value pair
1.18 +struct gfxFontFeature {
1.19 + uint32_t mTag; // see http://www.microsoft.com/typography/otspec/featuretags.htm
1.20 + uint32_t mValue; // 0 = off, 1 = on, larger values may be used as parameters
1.21 + // to features that select among multiple alternatives
1.22 +};
1.23 +
1.24 +inline bool
1.25 +operator<(const gfxFontFeature& a, const gfxFontFeature& b)
1.26 +{
1.27 + return (a.mTag < b.mTag) || ((a.mTag == b.mTag) && (a.mValue < b.mValue));
1.28 +}
1.29 +
1.30 +inline bool
1.31 +operator==(const gfxFontFeature& a, const gfxFontFeature& b)
1.32 +{
1.33 + return (a.mTag == b.mTag) && (a.mValue == b.mValue);
1.34 +}
1.35 +
1.36 +struct gfxAlternateValue {
1.37 + uint32_t alternate; // constants in gfxFontConstants.h
1.38 + nsString value; // string value to be looked up
1.39 +};
1.40 +
1.41 +inline bool
1.42 +operator<(const gfxAlternateValue& a, const gfxAlternateValue& b)
1.43 +{
1.44 + return (a.alternate < b.alternate) ||
1.45 + ((a.alternate == b.alternate) && (a.value < b.value));
1.46 +}
1.47 +
1.48 +inline bool
1.49 +operator==(const gfxAlternateValue& a, const gfxAlternateValue& b)
1.50 +{
1.51 + return (a.alternate == b.alternate) && (a.value == b.value);
1.52 +}
1.53 +
1.54 +class gfxFontFeatureValueSet MOZ_FINAL {
1.55 +public:
1.56 + NS_INLINE_DECL_REFCOUNTING(gfxFontFeatureValueSet)
1.57 +
1.58 + gfxFontFeatureValueSet();
1.59 +
1.60 + struct ValueList {
1.61 + ValueList(const nsAString& aName, const nsTArray<uint32_t>& aSelectors)
1.62 + : name(aName), featureSelectors(aSelectors)
1.63 + {}
1.64 + nsString name;
1.65 + nsTArray<uint32_t> featureSelectors;
1.66 + };
1.67 +
1.68 + struct FeatureValues {
1.69 + uint32_t alternate;
1.70 + nsTArray<ValueList> valuelist;
1.71 + };
1.72 +
1.73 + // returns true if found, false otherwise
1.74 + bool
1.75 + GetFontFeatureValuesFor(const nsAString& aFamily,
1.76 + uint32_t aVariantProperty,
1.77 + const nsAString& aName,
1.78 + nsTArray<uint32_t>& aValues);
1.79 + void
1.80 + AddFontFeatureValues(const nsAString& aFamily,
1.81 + const nsTArray<gfxFontFeatureValueSet::FeatureValues>& aValues);
1.82 +
1.83 +private:
1.84 + // Private destructor, to discourage deletion outside of Release():
1.85 + ~gfxFontFeatureValueSet() {}
1.86 +
1.87 + struct FeatureValueHashKey {
1.88 + nsString mFamily;
1.89 + uint32_t mPropVal;
1.90 + nsString mName;
1.91 +
1.92 + FeatureValueHashKey()
1.93 + : mPropVal(0)
1.94 + { }
1.95 + FeatureValueHashKey(const nsAString& aFamily,
1.96 + uint32_t aPropVal,
1.97 + const nsAString& aName)
1.98 + : mFamily(aFamily), mPropVal(aPropVal), mName(aName)
1.99 + { }
1.100 + FeatureValueHashKey(const FeatureValueHashKey& aKey)
1.101 + : mFamily(aKey.mFamily), mPropVal(aKey.mPropVal), mName(aKey.mName)
1.102 + { }
1.103 + };
1.104 +
1.105 + class FeatureValueHashEntry : public PLDHashEntryHdr {
1.106 + public:
1.107 + typedef const FeatureValueHashKey &KeyType;
1.108 + typedef const FeatureValueHashKey *KeyTypePointer;
1.109 +
1.110 + FeatureValueHashEntry(KeyTypePointer aKey) { }
1.111 + FeatureValueHashEntry(const FeatureValueHashEntry& toCopy)
1.112 + {
1.113 + NS_ERROR("Should not be called");
1.114 + }
1.115 + ~FeatureValueHashEntry() { }
1.116 +
1.117 + bool KeyEquals(const KeyTypePointer aKey) const;
1.118 + static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
1.119 + static PLDHashNumber HashKey(const KeyTypePointer aKey);
1.120 + enum { ALLOW_MEMMOVE = true };
1.121 +
1.122 + FeatureValueHashKey mKey;
1.123 + nsTArray<uint32_t> mValues;
1.124 + };
1.125 +
1.126 + nsTHashtable<FeatureValueHashEntry> mFontFeatureValues;
1.127 + };
1.128 +
1.129 +#endif
