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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MediaValues_h
#define MediaValues_h
#include "core/css/CSSPrimitiveValue.h"
#include "wtf/RefCounted.h"
#include "wtf/RefPtr.h"
namespace WebCore {
class Document;
class CSSPrimitiveValue;
class LocalFrame;
class MediaValues : public RefCounted<MediaValues> {
public:
enum MediaValuesMode {
CachingMode,
DynamicMode
};
enum PointerDeviceType {
TouchPointer,
MousePointer,
NoPointer,
UnknownPointer
};
virtual ~MediaValues() { }
static PassRefPtr<MediaValues> createDynamicIfFrameExists(LocalFrame*);
virtual PassRefPtr<MediaValues> copy() const = 0;
virtual bool isSafeToSendToAnotherThread() const = 0;
static bool computeLengthImpl(double value, CSSPrimitiveValue::UnitType, unsigned defaultFontSize, unsigned viewportWidth, unsigned viewportHeight, double& result);
template<typename T>
static bool computeLength(double value, CSSPrimitiveValue::UnitType type, unsigned defaultFontSize, unsigned viewportWidth, unsigned viewportHeight, T& result)
{
double tempResult;
if (!computeLengthImpl(value, type, defaultFontSize, viewportWidth, viewportHeight, tempResult))
return false;
result = roundForImpreciseConversion<T>(tempResult);
return true;
}
virtual bool computeLength(double value, CSSPrimitiveValue::UnitType, int& result) const = 0;
virtual bool computeLength(double value, CSSPrimitiveValue::UnitType, double& result) const = 0;
virtual int viewportWidth() const = 0;
virtual int viewportHeight() const = 0;
virtual int deviceWidth() const = 0;
virtual int deviceHeight() const = 0;
virtual float devicePixelRatio() const = 0;
virtual int colorBitsPerComponent() const = 0;
virtual int monochromeBitsPerComponent() const = 0;
virtual PointerDeviceType pointer() const = 0;
virtual bool threeDEnabled() const = 0;
virtual bool scanMediaType() const = 0;
virtual bool screenMediaType() const = 0;
virtual bool printMediaType() const = 0;
virtual bool strictMode() const = 0;
virtual Document* document() const = 0;
virtual bool hasValues() const = 0;
protected:
int calculateViewportWidth(LocalFrame*) const;
int calculateViewportHeight(LocalFrame*) const;
int calculateDeviceWidth(LocalFrame*) const;
int calculateDeviceHeight(LocalFrame*) const;
bool calculateStrictMode(LocalFrame*) const;
float calculateDevicePixelRatio(LocalFrame*) const;
int calculateColorBitsPerComponent(LocalFrame*) const;
int calculateMonochromeBitsPerComponent(LocalFrame*) const;
int calculateDefaultFontSize(LocalFrame*) const;
bool calculateScanMediaType(LocalFrame*) const;
bool calculateScreenMediaType(LocalFrame*) const;
bool calculatePrintMediaType(LocalFrame*) const;
bool calculateThreeDEnabled(LocalFrame*) const;
MediaValues::PointerDeviceType calculateLeastCapablePrimaryPointerDeviceType(LocalFrame*) const;
};
} // namespace
#endif // MediaValues_h
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