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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef FontFeatureSettings_h
#define FontFeatureSettings_h
#include <array>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
#include <wtf/text/AtomicString.h>
namespace WebCore {
typedef std::array<char, 4> FontFeatureTag;
inline FontFeatureTag fontFeatureTag(const char arr[4]) { return {{ arr[0], arr[1], arr[2], arr[3] }}; }
struct FontFeatureTagHash {
static unsigned hash(const FontFeatureTag& characters) { return (characters[0] << 24) | (characters[1] << 16) | (characters[2] << 8) | characters[3]; }
static bool equal(const FontFeatureTag& a, const FontFeatureTag& b) { return a == b; }
static const bool safeToCompareToEmptyOrDeleted = true;
};
#define _0xFF static_cast<char>(0xFF)
struct FontFeatureTagHashTraits : WTF::GenericHashTraits<FontFeatureTag> {
static const bool emptyValueIsZero = true;
static void constructDeletedValue(FontFeatureTag& slot) { new (NotNull, std::addressof(slot)) FontFeatureTag({{ _0xFF, _0xFF, _0xFF, _0xFF }}); }
static bool isDeletedValue(const FontFeatureTag& value) { return value == FontFeatureTag({{ _0xFF, _0xFF, _0xFF, _0xFF }}); }
};
#undef _0xFF
class FontFeature {
public:
FontFeature() = delete;
FontFeature(const FontFeatureTag&, int value);
FontFeature(FontFeatureTag&&, int value);
bool operator==(const FontFeature& other) const;
bool operator!=(const FontFeature& other) const { return !(*this == other); }
bool operator<(const FontFeature& other) const;
const FontFeatureTag& tag() const { return m_tag; }
int value() const { return m_value; }
bool enabled() const { return value(); }
private:
FontFeatureTag m_tag;
int m_value;
};
class FontFeatureSettings {
public:
void insert(FontFeature&&);
bool operator==(const FontFeatureSettings& other) const { return m_list == other.m_list; }
bool operator!=(const FontFeatureSettings& other) const { return !(*this == other); }
size_t size() const { return m_list.size(); }
const FontFeature& operator[](int index) const { return m_list[index]; }
const FontFeature& at(size_t index) const { return m_list.at(index); }
Vector<FontFeature>::const_iterator begin() const { return m_list.begin(); }
Vector<FontFeature>::const_iterator end() const { return m_list.end(); }
unsigned hash() const;
private:
Vector<FontFeature> m_list;
};
}
#endif // FontFeatureSettings_h
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