1 /* 2 Copyright (C) 1999 Lars Knoll (knoll (at) kde.org) 3 Copyright (C) 2006, 2008 Apple Inc. All rights reserved. 4 Copyright (C) 2011 Rik Cabanier (cabanier (at) adobe.com) 5 Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved. 6 Copyright (C) 2012 Motorola Mobility, Inc. All rights reserved. 7 8 This library is free software; you can redistribute it and/or 9 modify it under the terms of the GNU Library General Public 10 License as published by the Free Software Foundation; either 11 version 2 of the License, or (at your option) any later version. 12 13 This library is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 Library General Public License for more details. 17 18 You should have received a copy of the GNU Library General Public License 19 along with this library; see the file COPYING.LIB. If not, write to 20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 21 Boston, MA 02110-1301, USA. 22 */ 23 24 #include "config.h" 25 #include "core/css/LengthFunctions.h" 26 27 #include "core/platform/LayoutUnit.h" 28 #include "core/platform/Length.h" 29 #include "core/rendering/RenderView.h" 30 31 namespace WebCore { 32 33 int minimumIntValueForLength(const Length& length, LayoutUnit maximumValue, RenderView* renderView, bool roundPercentages) 34 { 35 return static_cast<int>(minimumValueForLength(length, maximumValue, renderView, roundPercentages)); 36 } 37 38 int intValueForLength(const Length& length, LayoutUnit maximumValue, RenderView* renderView, bool roundPercentages) 39 { 40 return static_cast<int>(valueForLength(length, maximumValue, renderView, roundPercentages)); 41 } 42 43 LayoutUnit minimumValueForLength(const Length& length, LayoutUnit maximumValue, RenderView* renderView, bool roundPercentages) 44 { 45 switch (length.type()) { 46 case Fixed: 47 return length.value(); 48 case Percent: 49 if (roundPercentages) 50 return static_cast<LayoutUnit>(round(maximumValue * length.percent() / 100.0f)); 51 // Don't remove the extra cast to float. It is needed for rounding on 32-bit Intel machines that use the FPU stack. 52 return static_cast<float>(maximumValue * length.percent() / 100.0f); 53 case Calculated: 54 return length.nonNanCalculatedValue(maximumValue); 55 case ViewportPercentageWidth: 56 if (renderView) 57 return static_cast<LayoutUnit>(renderView->viewportSize().width() * length.viewportPercentageLength() / 100.0f); 58 return 0; 59 case ViewportPercentageHeight: 60 if (renderView) 61 return static_cast<LayoutUnit>(renderView->viewportSize().height() * length.viewportPercentageLength() / 100.0f); 62 return 0; 63 case ViewportPercentageMin: 64 if (renderView) { 65 IntSize viewportSize = renderView->viewportSize(); 66 return static_cast<LayoutUnit>(std::min(viewportSize.width(), viewportSize.height()) * length.viewportPercentageLength() / 100.0f); 67 } 68 return 0; 69 case ViewportPercentageMax: 70 if (renderView) { 71 IntSize viewportSize = renderView->viewportSize(); 72 return static_cast<LayoutUnit>(std::max(viewportSize.width(), viewportSize.height()) * length.viewportPercentageLength() / 100.0f); 73 } 74 return 0; 75 case FillAvailable: 76 case Auto: 77 return 0; 78 case Relative: 79 case Intrinsic: 80 case MinIntrinsic: 81 case MinContent: 82 case MaxContent: 83 case FitContent: 84 case ExtendToZoom: 85 case Undefined: 86 ASSERT_NOT_REACHED(); 87 return 0; 88 } 89 ASSERT_NOT_REACHED(); 90 return 0; 91 } 92 93 LayoutUnit valueForLength(const Length& length, LayoutUnit maximumValue, RenderView* renderView, bool roundPercentages) 94 { 95 switch (length.type()) { 96 case Fixed: 97 case Percent: 98 case Calculated: 99 case ViewportPercentageWidth: 100 case ViewportPercentageHeight: 101 case ViewportPercentageMin: 102 case ViewportPercentageMax: 103 return minimumValueForLength(length, maximumValue, renderView, roundPercentages); 104 case FillAvailable: 105 case Auto: 106 return maximumValue; 107 case Relative: 108 case Intrinsic: 109 case MinIntrinsic: 110 case MinContent: 111 case MaxContent: 112 case FitContent: 113 case ExtendToZoom: 114 case Undefined: 115 ASSERT_NOT_REACHED(); 116 return 0; 117 } 118 ASSERT_NOT_REACHED(); 119 return 0; 120 } 121 122 float floatValueForLength(const Length& length, float maximumValue, RenderView* renderView) 123 { 124 switch (length.type()) { 125 case Fixed: 126 return length.getFloatValue(); 127 case Percent: 128 return static_cast<float>(maximumValue * length.percent() / 100.0f); 129 case FillAvailable: 130 case Auto: 131 return static_cast<float>(maximumValue); 132 case Calculated: 133 return length.nonNanCalculatedValue(maximumValue); 134 case ViewportPercentageWidth: 135 if (renderView) 136 return static_cast<int>(renderView->viewportSize().width() * length.viewportPercentageLength() / 100.0f); 137 return 0; 138 case ViewportPercentageHeight: 139 if (renderView) 140 return static_cast<int>(renderView->viewportSize().height() * length.viewportPercentageLength() / 100.0f); 141 return 0; 142 case ViewportPercentageMin: 143 if (renderView) { 144 IntSize viewportSize = renderView->viewportSize(); 145 return static_cast<int>(std::min(viewportSize.width(), viewportSize.height()) * length.viewportPercentageLength() / 100.0f); 146 } 147 return 0; 148 case ViewportPercentageMax: 149 if (renderView) { 150 IntSize viewportSize = renderView->viewportSize(); 151 return static_cast<int>(std::max(viewportSize.width(), viewportSize.height()) * length.viewportPercentageLength() / 100.0f); 152 } 153 return 0; 154 case Relative: 155 case Intrinsic: 156 case MinIntrinsic: 157 case MinContent: 158 case MaxContent: 159 case FitContent: 160 case ExtendToZoom: 161 case Undefined: 162 ASSERT_NOT_REACHED(); 163 return 0; 164 } 165 ASSERT_NOT_REACHED(); 166 return 0; 167 } 168 169 } // namespace WebCore 170
