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1 /* | 1 /* |
2 * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved. | 2 * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved. |
3 * | 3 * |
4 * This library is free software; you can redistribute it and/or | 4 * This library is free software; you can redistribute it and/or |
5 * modify it under the terms of the GNU Library General Public | 5 * modify it under the terms of the GNU Library General Public |
6 * License as published by the Free Software Foundation; either | 6 * License as published by the Free Software Foundation; either |
7 * version 2 of the License, or (at your option) any later version. | 7 * version 2 of the License, or (at your option) any later version. |
8 * | 8 * |
9 * This library is distributed in the hope that it will be useful, | 9 * This library is distributed in the hope that it will be useful, |
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 * Library General Public License for more details. | 12 * Library General Public License for more details. |
13 * | 13 * |
14 * You should have received a copy of the GNU Library General Public License | 14 * You should have received a copy of the GNU Library General Public License |
15 * along with this library; see the file COPYING.LIB. If not, write to | 15 * along with this library; see the file COPYING.LIB. If not, write to |
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
17 * Boston, MA 02110-1301, USA. | 17 * Boston, MA 02110-1301, USA. |
18 * | 18 * |
19 */ | 19 */ |
20 | 20 |
21 #include "config.h" | 21 #include "config.h" |
22 #include "core/html/forms/StepRange.h" | 22 #include "core/html/forms/StepRange.h" |
23 | 23 |
24 #include "HTMLNames.h" | 24 #include "HTMLNames.h" |
25 #include "core/html/parser/HTMLParserIdioms.h" | 25 #include "core/html/parser/HTMLParserIdioms.h" |
26 #include "wtf/MathExtras.h" | 26 #include "wtf/MathExtras.h" |
27 #include "wtf/text/WTFString.h" | 27 #include "wtf/text/WTFString.h" |
28 #include <float.h> | 28 #include <float.h> |
29 #include <stdio.h> | |
tkent
2014/02/28 01:12:04
This change is unnecessary.
Habib Virji
2014/03/04 09:33:44
Done. Apologies missed it.
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29 | 30 |
30 using namespace std; | 31 using namespace std; |
31 | 32 |
32 namespace WebCore { | 33 namespace WebCore { |
33 | 34 |
34 using namespace HTMLNames; | 35 using namespace HTMLNames; |
35 | 36 |
36 StepRange::StepRange() | 37 StepRange::StepRange() |
37 : m_maximum(100) | 38 : m_maximum(100) |
38 , m_minimum(0) | 39 , m_minimum(0) |
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150 return false; | 151 return false; |
151 const Decimal value = (valueForCheck - m_stepBase).abs(); | 152 const Decimal value = (valueForCheck - m_stepBase).abs(); |
152 if (!value.isFinite()) | 153 if (!value.isFinite()) |
153 return false; | 154 return false; |
154 // Decimal's fractional part size is DBL_MAN_DIG-bit. If the current value | 155 // Decimal's fractional part size is DBL_MAN_DIG-bit. If the current value |
155 // is greater than step*2^DBL_MANT_DIG, the following computation for | 156 // is greater than step*2^DBL_MANT_DIG, the following computation for |
156 // remainder makes no sense. | 157 // remainder makes no sense. |
157 DEFINE_STATIC_LOCAL(const Decimal, twoPowerOfDoubleMantissaBits, (Decimal::P ositive, 0, UINT64_C(1) << DBL_MANT_DIG)); | 158 DEFINE_STATIC_LOCAL(const Decimal, twoPowerOfDoubleMantissaBits, (Decimal::P ositive, 0, UINT64_C(1) << DBL_MANT_DIG)); |
158 if (value / twoPowerOfDoubleMantissaBits > m_step) | 159 if (value / twoPowerOfDoubleMantissaBits > m_step) |
159 return false; | 160 return false; |
160 // The computation follows HTML5 4.10.7.2.10 `The step attribute' : | 161 // http://www.whatwg.org/specs/web-apps/current-work/#the-step-attribute: |
tkent
2014/02/28 01:12:04
We don't need to update this now.
Habib Virji
2014/03/04 09:33:44
Done.
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161 // ... that number subtracted from the step base is not an integral multiple | 162 // ... that number subtracted from the step base is not an integral multiple |
162 // of the allowed value step, the element is suffering from a step mismatch. | 163 // of the allowed value step, the element is suffering from a step mismatch. |
163 const Decimal remainder = (value - m_step * (value / m_step).round()).abs(); | 164 const Decimal remainder = (value - m_step * (value / m_step).round()).abs(); |
164 // Accepts errors in lower fractional part which IEEE 754 single-precision | 165 // Accepts errors in lower fractional part which IEEE 754 double-precision |
tkent
2014/02/28 01:12:04
Ditto.
Habib Virji
2014/03/04 09:33:44
Done.
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165 // can't represent. | 166 // can't represent. |
166 const Decimal computedAcceptableError = acceptableError(); | 167 const Decimal computedAcceptableError = acceptableError(); |
167 return computedAcceptableError < remainder && remainder < (m_step - computed AcceptableError); | 168 return computedAcceptableError < remainder && remainder < (m_step - computed AcceptableError); |
168 } | 169 } |
169 | 170 |
170 } // namespace WebCore | 171 } // namespace WebCore |
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