1 /*
2 Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
4 Copyright (C) 2011 Rik Cabanier (cabanier@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
intValueForLength(const Length & length,LayoutUnit maximumValue)32 int intValueForLength(const Length& length, LayoutUnit maximumValue)
33 {
34 return static_cast<int>(valueForLength(length, maximumValue));
35 }
36
floatValueForLength(const Length & length,float maximumValue)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
minimumValueForLength(const Length & length,LayoutUnit maximumValue)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
roundedMinimumValueForLength(const Length & length,LayoutUnit maximumValue)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
valueForLength(const Length & length,LayoutUnit maximumValue)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
floatSizeForLengthSize(const LengthSize & lengthSize,const FloatSize & boxSize)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