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 "platform/LengthFunctions.h" 26 27 #include "platform/LayoutUnit.h" 28 #include "platform/LengthSize.h" 29 30 namespace blink { 31 32 int intValueForLength(const Length& length, LayoutUnit maximumValue) 33 { 34 return static_cast<int>(valueForLength(length, maximumValue)); 35 } 36 37 float floatValueForLength(const Length& length, float maximumValue) 38 { 39 switch (length.type()) { 40 case Fixed: 41 return length.getFloatValue(); 42 case Percent: 43 return static_cast<float>(maximumValue * length.percent() / 100.0f); 44 case FillAvailable: 45 case Auto: 46 return static_cast<float>(maximumValue); 47 case Calculated: 48 return length.nonNanCalculatedValue(maximumValue); 49 case Intrinsic: 50 case MinIntrinsic: 51 case MinContent: 52 case MaxContent: 53 case FitContent: 54 case ExtendToZoom: 55 case DeviceWidth: 56 case DeviceHeight: 57 case MaxSizeNone: 58 ASSERT_NOT_REACHED(); 59 return 0; 60 } 61 ASSERT_NOT_REACHED(); 62 return 0; 63 } 64 65 LayoutUnit minimumValueForLength(const Length& length, LayoutUnit maximumValue) 66 { 67 switch (length.type()) { 68 case Fixed: 69 return length.value(); 70 case Percent: 71 // Don't remove the extra cast to float. It is needed for rounding on 32-bit Intel machines that use the FPU stack. 72 return static_cast<float>(maximumValue * length.percent() / 100.0f); 73 case Calculated: 74 return length.nonNanCalculatedValue(maximumValue); 75 case FillAvailable: 76 case Auto: 77 return 0; 78 case Intrinsic: 79 case MinIntrinsic: 80 case MinContent: 81 case MaxContent: 82 case FitContent: 83 case ExtendToZoom: 84 case DeviceWidth: 85 case DeviceHeight: 86 case MaxSizeNone: 87 ASSERT_NOT_REACHED(); 88 return 0; 89 } 90 ASSERT_NOT_REACHED(); 91 return 0; 92 } 93 94 LayoutUnit roundedMinimumValueForLength(const Length& length, LayoutUnit maximumValue) 95 { 96 if (length.type() == Percent) 97 return static_cast<LayoutUnit>(round(maximumValue * length.percent() / 100.0f)); 98 return minimumValueForLength(length, maximumValue); 99 } 100 101 LayoutUnit valueForLength(const Length& length, LayoutUnit maximumValue) 102 { 103 switch (length.type()) { 104 case Fixed: 105 case Percent: 106 case Calculated: 107 return minimumValueForLength(length, maximumValue); 108 case FillAvailable: 109 case Auto: 110 return maximumValue; 111 case Intrinsic: 112 case MinIntrinsic: 113 case MinContent: 114 case MaxContent: 115 case FitContent: 116 case ExtendToZoom: 117 case DeviceWidth: 118 case DeviceHeight: 119 case MaxSizeNone: 120 ASSERT_NOT_REACHED(); 121 return 0; 122 } 123 ASSERT_NOT_REACHED(); 124 return 0; 125 } 126 127 FloatSize floatSizeForLengthSize(const LengthSize& lengthSize, const FloatSize& boxSize) 128 { 129 return FloatSize(floatValueForLength(lengthSize.width(), boxSize.width()), floatValueForLength(lengthSize.height(), boxSize.height())); 130 } 131 132 } // namespace blink 133