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/*
* Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
*
* 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.
*
*/
#pragma once
#if ENABLE(TEXT_AUTOSIZING)
#include <wtf/OptionSet.h>
namespace WebCore {
class RenderStyle;
class TextSizeAdjustment {
public:
static constexpr TextSizeAdjustment autoAdjust() { return TextSizeAdjustment(true); }
static constexpr TextSizeAdjustment none() { return TextSizeAdjustment(false); }
constexpr TextSizeAdjustment() : m_value(Auto) { }
constexpr TextSizeAdjustment(float value) : m_value(value) { ASSERT_UNDER_CONSTEXPR_CONTEXT(m_value >= 0); }
constexpr float percentage() const { ASSERT_UNDER_CONSTEXPR_CONTEXT(m_value >= 0); return m_value; }
constexpr float multiplier() const { ASSERT_UNDER_CONSTEXPR_CONTEXT(m_value >= 0); return m_value / 100; }
constexpr bool isAuto() const { return m_value == Auto; }
constexpr bool isNone() const { return m_value == None; }
constexpr bool isPercentage() const { return m_value >= 0; }
friend constexpr bool operator==(TextSizeAdjustment, TextSizeAdjustment) = default;
private:
static constexpr float Auto = -1;
static constexpr float None = -2;
constexpr TextSizeAdjustment(bool isAuto) : m_value(isAuto ? Auto : None) { }
float m_value;
};
class AutosizeStatus {
public:
enum class Fields : uint8_t {
AvoidSubtree = 1 << 0,
FixedHeight = 1 << 1,
FixedWidth = 1 << 2,
Floating = 1 << 3,
OverflowXHidden = 1 << 4,
// Adding new values requires giving RenderStyle::InheritedFlags::autosizeStatus additional bits.
};
constexpr AutosizeStatus(OptionSet<Fields>);
constexpr OptionSet<Fields> fields() const { return m_fields; }
constexpr bool contains(Fields) const;
friend constexpr bool operator==(AutosizeStatus, AutosizeStatus) = default;
static float idempotentTextSize(float specifiedSize, float pageScale);
static AutosizeStatus computeStatus(const RenderStyle&);
static void updateStatus(RenderStyle&);
static bool probablyContainsASmallFixedNumberOfLines(const RenderStyle&);
private:
OptionSet<Fields> m_fields;
};
constexpr AutosizeStatus::AutosizeStatus(OptionSet<Fields> fields)
: m_fields(fields)
{
}
constexpr bool AutosizeStatus::contains(Fields fields) const
{
return m_fields.contains(fields);
}
} // namespace WebCore
#endif // ENABLE(TEXT_AUTOSIZING)
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