#ifndef TimingFunction_h
#define TimingFunction_h
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class TimingFunction : public RefCounted<TimingFunction> {
public:
virtual PassRefPtr<TimingFunction> clone() const = 0;
enum TimingFunctionType {
LinearFunction, CubicBezierFunction, StepsFunction, SpringFunction
};
virtual ~TimingFunction() { }
TimingFunctionType type() const { return m_type; }
bool isLinearTimingFunction() const { return m_type == LinearFunction; }
bool isCubicBezierTimingFunction() const { return m_type == CubicBezierFunction; }
bool isStepsTimingFunction() const { return m_type == StepsFunction; }
bool isSpringTimingFunction() const { return m_type == SpringFunction; }
virtual bool operator==(const TimingFunction& other) = 0;
protected:
TimingFunction(TimingFunctionType type)
: m_type(type)
{
}
TimingFunctionType m_type;
};
class LinearTimingFunction final : public TimingFunction {
public:
static PassRefPtr<LinearTimingFunction> create()
{
return adoptRef(new LinearTimingFunction);
}
virtual ~LinearTimingFunction() { }
bool operator==(const TimingFunction& other) override
{
return other.isLinearTimingFunction();
}
private:
LinearTimingFunction()
: TimingFunction(LinearFunction)
{
}
PassRefPtr<TimingFunction> clone() const override
{
return adoptRef(new LinearTimingFunction);
}
};
class CubicBezierTimingFunction final : public TimingFunction {
public:
enum TimingFunctionPreset {
Ease,
EaseIn,
EaseOut,
EaseInOut,
Custom
};
static PassRefPtr<CubicBezierTimingFunction> create(double x1, double y1, double x2, double y2)
{
return adoptRef(new CubicBezierTimingFunction(Custom, x1, y1, x2, y2));
}
static PassRefPtr<CubicBezierTimingFunction> create()
{
return adoptRef(new CubicBezierTimingFunction());
}
static PassRefPtr<CubicBezierTimingFunction> create(TimingFunctionPreset preset)
{
switch (preset) {
case Ease:
return adoptRef(new CubicBezierTimingFunction());
case EaseIn:
return adoptRef(new CubicBezierTimingFunction(EaseIn, 0.42, 0.0, 1.0, 1.0));
case EaseOut:
return adoptRef(new CubicBezierTimingFunction(EaseOut, 0.0, 0.0, 0.58, 1.0));
case EaseInOut:
return adoptRef(new CubicBezierTimingFunction(EaseInOut, 0.42, 0.0, 0.58, 1.0));
default:
ASSERT_NOT_REACHED();
return 0;
}
}
virtual ~CubicBezierTimingFunction() { }
bool operator==(const TimingFunction& other) override
{
if (other.isCubicBezierTimingFunction()) {
const CubicBezierTimingFunction* ctf = static_cast<const CubicBezierTimingFunction*>(&other);
if (m_timingFunctionPreset != Custom)
return m_timingFunctionPreset == ctf->m_timingFunctionPreset;
return m_x1 == ctf->m_x1 && m_y1 == ctf->m_y1 && m_x2 == ctf->m_x2 && m_y2 == ctf->m_y2;
}
return false;
}
double x1() const { return m_x1; }
double y1() const { return m_y1; }
double x2() const { return m_x2; }
double y2() const { return m_y2; }
void setValues(double x1, double y1, double x2, double y2)
{
m_x1 = x1;
m_y1 = y1;
m_x2 = x2;
m_y2 = y2;
}
TimingFunctionPreset timingFunctionPreset() const { return m_timingFunctionPreset; }
void setTimingFunctionPreset(TimingFunctionPreset preset) { m_timingFunctionPreset = preset; }
static const CubicBezierTimingFunction* defaultTimingFunction()
{
static const CubicBezierTimingFunction* dtf = create().leakRef();
return dtf;
}
PassRefPtr<CubicBezierTimingFunction> createReversed() const
{
return create(1.0 - m_x2, 1.0 - m_y2, 1.0 - m_x1, 1.0 - m_y1);
}
private:
explicit CubicBezierTimingFunction(TimingFunctionPreset preset = Ease, double x1 = 0.25, double y1 = 0.1, double x2 = 0.25, double y2 = 1.0)
: TimingFunction(CubicBezierFunction)
, m_x1(x1)
, m_y1(y1)
, m_x2(x2)
, m_y2(y2)
, m_timingFunctionPreset(preset)
{
}
PassRefPtr<TimingFunction> clone() const override
{
return adoptRef(new CubicBezierTimingFunction(m_timingFunctionPreset, m_x1, m_y1, m_x2, m_y2));
}
double m_x1;
double m_y1;
double m_x2;
double m_y2;
TimingFunctionPreset m_timingFunctionPreset;
};
class StepsTimingFunction final : public TimingFunction {
public:
static PassRefPtr<StepsTimingFunction> create(int steps, bool stepAtStart)
{
return adoptRef(new StepsTimingFunction(steps, stepAtStart));
}
static PassRefPtr<StepsTimingFunction> create()
{
return adoptRef(new StepsTimingFunction(1, true));
}
virtual ~StepsTimingFunction() { }
bool operator==(const TimingFunction& other) override
{
if (other.isStepsTimingFunction()) {
const StepsTimingFunction* stf = static_cast<const StepsTimingFunction*>(&other);
return m_steps == stf->m_steps && m_stepAtStart == stf->m_stepAtStart;
}
return false;
}
int numberOfSteps() const { return m_steps; }
void setNumberOfSteps(int steps) { m_steps = steps; }
bool stepAtStart() const { return m_stepAtStart; }
void setStepAtStart(bool stepAtStart) { m_stepAtStart = stepAtStart; }
private:
StepsTimingFunction(int steps, bool stepAtStart)
: TimingFunction(StepsFunction)
, m_steps(steps)
, m_stepAtStart(stepAtStart)
{
}
PassRefPtr<TimingFunction> clone() const override
{
return adoptRef(new StepsTimingFunction(m_steps, m_stepAtStart));
}
int m_steps;
bool m_stepAtStart;
};
class SpringTimingFunction final : public TimingFunction {
public:
static Ref<SpringTimingFunction> create(double mass, double stiffness, double damping, double initialVelocity)
{
return adoptRef(*new SpringTimingFunction(mass, stiffness, damping, initialVelocity));
}
static Ref<SpringTimingFunction> create()
{
return create(0, 0, 0, 0);
}
bool operator==(const TimingFunction& other) override
{
if (other.isSpringTimingFunction()) {
const SpringTimingFunction& otherString = *static_cast<const SpringTimingFunction*>(&other);
return m_mass == otherString.m_mass && m_stiffness == otherString.m_stiffness && m_damping == otherString.m_damping && m_initialVelocity == otherString.m_initialVelocity;
}
return false;
}
double mass() const { return m_mass; }
double stiffness() const { return m_stiffness; }
double damping() const { return m_damping; }
double initialVelocity() const { return m_initialVelocity; }
void setValues(double mass, double stiffness, double damping, double initialVelocity)
{
m_mass = mass;
m_stiffness = stiffness;
m_damping = damping;
m_initialVelocity = initialVelocity;
}
private:
explicit SpringTimingFunction(double mass, double stiffness, double damping, double initialVelocity)
: TimingFunction(SpringFunction)
, m_mass(mass)
, m_stiffness(stiffness)
, m_damping(damping)
, m_initialVelocity(initialVelocity)
{
}
PassRefPtr<TimingFunction> clone() const override
{
return adoptRef(new SpringTimingFunction(m_mass, m_stiffness, m_damping, m_initialVelocity));
}
double m_mass;
double m_stiffness;
double m_damping;
double m_initialVelocity;
};
class TextStream;
WEBCORE_EXPORT TextStream& operator<<(TextStream&, const TimingFunction&);
}
#endif // TimingFunction_h