1 /* 2 * Copyright 2012, The Android Open Source Project 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef FixedPositioning_h 27 #define FixedPositioning_h 28 29 #if USE(ACCELERATED_COMPOSITING) 30 31 #include "LayerAndroid.h" 32 #include "Length.h" 33 34 namespace WebCore { 35 36 class IFrameLayerAndroid; 37 38 struct SkLength { 39 enum SkLengthType { Undefined, Auto, Relative, 40 Percent, Fixed, Static, Intrinsic, MinIntrinsic }; 41 SkLengthType type; 42 SkScalar value; SkLengthSkLength43 SkLength() 44 { 45 type = Undefined; 46 value = 0; 47 } definedSkLength48 bool defined() const 49 { 50 if (type == Undefined) 51 return false; 52 return true; 53 } setFixedValueSkLength54 void setFixedValue(float v) 55 { 56 type = Fixed; 57 value = v; 58 } setAutoSkLength59 void setAuto() 60 { 61 type = Auto; 62 } calcFloatValueSkLength63 float calcFloatValue(float max) const 64 { 65 switch (type) { 66 case Percent: 67 return (max * value) / 100.0f; 68 case Fixed: 69 return value; 70 default: 71 return value; 72 } 73 } 74 convertLengthSkLength75 static SkLength convertLength(Length len) 76 { 77 SkLength length; 78 length.type = SkLength::Undefined; 79 length.value = 0; 80 if (len.type() == WebCore::Percent) { 81 length.type = SkLength::Percent; 82 length.value = len.percent(); 83 } 84 if (len.type() == WebCore::Fixed) { 85 length.type = SkLength::Fixed; 86 length.value = len.value(); 87 } 88 return length; 89 } 90 91 }; 92 93 class FixedPositioning { 94 95 public: m_layer(layer)96 FixedPositioning(LayerAndroid* layer = 0) : m_layer(layer) {} 97 FixedPositioning(LayerAndroid* layer, const FixedPositioning& position); ~FixedPositioning()98 virtual ~FixedPositioning() {}; 99 isBackgroundImagePositioning()100 virtual bool isBackgroundImagePositioning() { return true; } copy(LayerAndroid * layer)101 virtual FixedPositioning* copy(LayerAndroid* layer) const { 102 return new FixedPositioning(layer, *this); 103 } 104 setFixedPosition(SkLength left,SkLength top,SkLength right,SkLength bottom,SkLength marginLeft,SkLength marginTop,SkLength marginRight,SkLength marginBottom,const IntPoint & renderLayerPos,SkRect viewRect)105 void setFixedPosition(SkLength left, // CSS left property 106 SkLength top, // CSS top property 107 SkLength right, // CSS right property 108 SkLength bottom, // CSS bottom property 109 SkLength marginLeft, // CSS margin-left property 110 SkLength marginTop, // CSS margin-top property 111 SkLength marginRight, // CSS margin-right property 112 SkLength marginBottom, // CSS margin-bottom property 113 const IntPoint& renderLayerPos, // For undefined fixed position 114 SkRect viewRect) { // view rect, can be smaller than the layer's 115 m_fixedLeft = left; 116 m_fixedTop = top; 117 m_fixedRight = right; 118 m_fixedBottom = bottom; 119 m_fixedMarginLeft = marginLeft; 120 m_fixedMarginTop = marginTop; 121 m_fixedMarginRight = marginRight; 122 m_fixedMarginBottom = marginBottom; 123 m_fixedRect = viewRect; 124 m_renderLayerPos = renderLayerPos; 125 } 126 127 SkRect getViewport(SkRect viewport, IFrameLayerAndroid* parentIframeLayer); 128 virtual IFrameLayerAndroid* updatePosition(SkRect viewPort, 129 IFrameLayerAndroid* parentIframeLayer); 130 131 void contentDraw(SkCanvas* canvas, Layer::PaintStyle style); 132 133 void dumpLayer(LayerDumper*) const; 134 135 // ViewStateSerializer friends 136 friend void android::serializeLayer(LayerAndroid* layer, SkWStream* stream); 137 friend LayerAndroid* android::deserializeLayer(int version, SkStream* stream); 138 139 protected: 140 LayerAndroid* m_layer; 141 142 SkLength m_fixedLeft; 143 SkLength m_fixedTop; 144 SkLength m_fixedRight; 145 SkLength m_fixedBottom; 146 SkLength m_fixedMarginLeft; 147 SkLength m_fixedMarginTop; 148 SkLength m_fixedMarginRight; 149 SkLength m_fixedMarginBottom; 150 SkRect m_fixedRect; 151 152 // When fixed element is undefined or auto, the render layer's position 153 // is needed for offset computation 154 IntPoint m_renderLayerPos; 155 }; 156 157 class BackgroundImagePositioning : public FixedPositioning { 158 public: BackgroundImagePositioning(LayerAndroid * layer)159 BackgroundImagePositioning(LayerAndroid* layer) 160 : FixedPositioning(layer) 161 , m_repeatX(false) 162 , m_repeatY(false) 163 , m_nbRepeatX(0) 164 , m_nbRepeatY(0) 165 , m_offsetX(0) 166 , m_offsetY(0) 167 {} 168 BackgroundImagePositioning(LayerAndroid* layer, const BackgroundImagePositioning& position); isBackgroundImagePositioning()169 virtual bool isBackgroundImagePositioning() { return true; } copy(LayerAndroid * layer)170 virtual FixedPositioning* copy(LayerAndroid* layer) const { 171 return new BackgroundImagePositioning(layer, *this); 172 } setPosition(SkLength left,SkLength top)173 void setPosition(SkLength left, SkLength top) { 174 m_fixedLeft = left; 175 m_fixedTop = top; 176 } 177 virtual IFrameLayerAndroid* updatePosition(SkRect viewPort, 178 IFrameLayerAndroid* parentIframeLayer); 179 180 // Measures the background image repetition setRepeatX(bool repeat)181 void setRepeatX(bool repeat) { m_repeatX = repeat; } setRepeatY(bool repeat)182 void setRepeatY(bool repeat) { m_repeatY = repeat; } repeatX()183 bool repeatX() { return m_repeatX; } repeatY()184 bool repeatY() { return m_repeatY; } nbRepeatX()185 int nbRepeatX() { return m_nbRepeatX; } offsetX()186 int offsetX() { return m_offsetX; } nbRepeatY()187 int nbRepeatY() { return m_nbRepeatY; } offsetY()188 int offsetY() { return m_offsetY; } 189 190 private: 191 bool m_repeatX; 192 bool m_repeatY; 193 int m_nbRepeatX; 194 int m_nbRepeatY; 195 int m_offsetX; 196 int m_offsetY; 197 }; 198 199 } 200 201 #endif // USE(ACCELERATED_COMPOSITING) 202 203 #endif // FixedPositioning_h 204