1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef MediaValues_h 6 #define MediaValues_h 7 8 #include "core/css/CSSPrimitiveValue.h" 9 #include "wtf/RefCounted.h" 10 #include "wtf/RefPtr.h" 11 12 namespace WebCore { 13 14 class Document; 15 class CSSPrimitiveValue; 16 class LocalFrame; 17 18 class MediaValues : public RefCounted<MediaValues> { 19 public: 20 21 enum MediaValuesMode { 22 CachingMode, 23 DynamicMode 24 }; 25 26 enum PointerDeviceType { 27 TouchPointer, 28 MousePointer, 29 NoPointer, 30 UnknownPointer 31 }; 32 ~MediaValues()33 virtual ~MediaValues() { } 34 35 static PassRefPtr<MediaValues> createDynamicIfFrameExists(LocalFrame*); 36 virtual PassRefPtr<MediaValues> copy() const = 0; 37 virtual bool isSafeToSendToAnotherThread() const = 0; 38 39 static bool computeLengthImpl(double value, CSSPrimitiveValue::UnitType, unsigned defaultFontSize, unsigned viewportWidth, unsigned viewportHeight, double& result); 40 template<typename T> computeLength(double value,CSSPrimitiveValue::UnitType type,unsigned defaultFontSize,unsigned viewportWidth,unsigned viewportHeight,T & result)41 static bool computeLength(double value, CSSPrimitiveValue::UnitType type, unsigned defaultFontSize, unsigned viewportWidth, unsigned viewportHeight, T& result) 42 { 43 double tempResult; 44 if (!computeLengthImpl(value, type, defaultFontSize, viewportWidth, viewportHeight, tempResult)) 45 return false; 46 result = roundForImpreciseConversion<T>(tempResult); 47 return true; 48 } 49 virtual bool computeLength(double value, CSSPrimitiveValue::UnitType, int& result) const = 0; 50 virtual bool computeLength(double value, CSSPrimitiveValue::UnitType, double& result) const = 0; 51 52 virtual int viewportWidth() const = 0; 53 virtual int viewportHeight() const = 0; 54 virtual int deviceWidth() const = 0; 55 virtual int deviceHeight() const = 0; 56 virtual float devicePixelRatio() const = 0; 57 virtual int colorBitsPerComponent() const = 0; 58 virtual int monochromeBitsPerComponent() const = 0; 59 virtual PointerDeviceType pointer() const = 0; 60 virtual bool threeDEnabled() const = 0; 61 virtual bool scanMediaType() const = 0; 62 virtual bool screenMediaType() const = 0; 63 virtual bool printMediaType() const = 0; 64 virtual bool strictMode() const = 0; 65 virtual Document* document() const = 0; 66 virtual bool hasValues() const = 0; 67 68 protected: 69 int calculateViewportWidth(LocalFrame*) const; 70 int calculateViewportHeight(LocalFrame*) const; 71 int calculateDeviceWidth(LocalFrame*) const; 72 int calculateDeviceHeight(LocalFrame*) const; 73 bool calculateStrictMode(LocalFrame*) const; 74 float calculateDevicePixelRatio(LocalFrame*) const; 75 int calculateColorBitsPerComponent(LocalFrame*) const; 76 int calculateMonochromeBitsPerComponent(LocalFrame*) const; 77 int calculateDefaultFontSize(LocalFrame*) const; 78 bool calculateScanMediaType(LocalFrame*) const; 79 bool calculateScreenMediaType(LocalFrame*) const; 80 bool calculatePrintMediaType(LocalFrame*) const; 81 bool calculateThreeDEnabled(LocalFrame*) const; 82 MediaValues::PointerDeviceType calculateLeastCapablePrimaryPointerDeviceType(LocalFrame*) const; 83 84 }; 85 86 } // namespace 87 88 #endif // MediaValues_h 89