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| 1 /* | |
| 2 * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * This library is free software; you can redistribute it and/or | |
| 5 * modify it under the terms of the GNU Library General Public | |
| 6 * License as published by the Free Software Foundation; either | |
| 7 * version 2 of the License, or (at your option) any later version. | |
| 8 * | |
| 9 * This library is distributed in the hope that it will be useful, | |
| 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 * Library General Public License for more details. | |
| 13 * | |
| 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 | |
| 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
| 17 * Boston, MA 02110-1301, USA. | |
| 18 * | |
| 19 */ | |
| 20 | |
| 21 #ifndef StepRange_h | |
| 22 #define StepRange_h | |
| 23 | |
| 24 #include "core/platform/Decimal.h" | |
| 25 #include "wtf/Forward.h" | |
| 26 | |
| 27 namespace WebCore { | |
| 28 | |
| 29 class HTMLInputElement; | |
| 30 | |
| 31 enum AnyStepHandling { RejectAny, AnyIsDefaultStep }; | |
| 32 | |
| 33 class StepRange { | |
| 34 public: | |
| 35 enum StepValueShouldBe { | |
| 36 StepValueShouldBeReal, | |
| 37 ParsedStepValueShouldBeInteger, | |
| 38 ScaledStepValueShouldBeInteger, | |
| 39 }; | |
| 40 | |
| 41 struct StepDescription { | |
| 42 WTF_MAKE_FAST_ALLOCATED; | |
| 43 public: | |
| 44 int defaultStep; | |
| 45 int defaultStepBase; | |
| 46 int stepScaleFactor; | |
| 47 StepValueShouldBe stepValueShouldBe; | |
| 48 | |
| 49 StepDescription(int defaultStep, int defaultStepBase, int stepScaleFacto
r, StepValueShouldBe stepValueShouldBe = StepValueShouldBeReal) | |
| 50 : defaultStep(defaultStep) | |
| 51 , defaultStepBase(defaultStepBase) | |
| 52 , stepScaleFactor(stepScaleFactor) | |
| 53 , stepValueShouldBe(stepValueShouldBe) | |
| 54 { | |
| 55 } | |
| 56 | |
| 57 StepDescription() | |
| 58 : defaultStep(1) | |
| 59 , defaultStepBase(0) | |
| 60 , stepScaleFactor(1) | |
| 61 , stepValueShouldBe(StepValueShouldBeReal) | |
| 62 { | |
| 63 } | |
| 64 | |
| 65 Decimal defaultValue() const | |
| 66 { | |
| 67 return defaultStep * stepScaleFactor; | |
| 68 } | |
| 69 }; | |
| 70 | |
| 71 StepRange(); | |
| 72 StepRange(const StepRange&); | |
| 73 StepRange(const Decimal& stepBase, const Decimal& minimum, const Decimal& ma
ximum, const Decimal& step, const StepDescription&); | |
| 74 Decimal acceptableError() const; | |
| 75 Decimal alignValueForStep(const Decimal& currentValue, const Decimal& newVal
ue) const; | |
| 76 Decimal clampValue(const Decimal& value) const; | |
| 77 bool hasStep() const { return m_hasStep; } | |
| 78 Decimal maximum() const { return m_maximum; } | |
| 79 Decimal minimum() const { return m_minimum; } | |
| 80 static Decimal parseStep(AnyStepHandling, const StepDescription&, const Stri
ng&); | |
| 81 Decimal step() const { return m_step; } | |
| 82 Decimal stepBase() const { return m_stepBase; } | |
| 83 int stepScaleFactor() const { return m_stepDescription.stepScaleFactor; } | |
| 84 bool stepMismatch(const Decimal&) const; | |
| 85 | |
| 86 // Clamp the middle value according to the step | |
| 87 Decimal defaultValue() const | |
| 88 { | |
| 89 return clampValue((m_minimum + m_maximum) / 2); | |
| 90 } | |
| 91 | |
| 92 // Map value into 0-1 range | |
| 93 Decimal proportionFromValue(const Decimal& value) const | |
| 94 { | |
| 95 if (m_minimum == m_maximum) | |
| 96 return 0; | |
| 97 | |
| 98 return (value - m_minimum) / (m_maximum - m_minimum); | |
| 99 } | |
| 100 | |
| 101 // Map from 0-1 range to value | |
| 102 Decimal valueFromProportion(const Decimal& proportion) const | |
| 103 { | |
| 104 return m_minimum + proportion * (m_maximum - m_minimum); | |
| 105 } | |
| 106 | |
| 107 private: | |
| 108 StepRange& operator =(const StepRange&); | |
| 109 Decimal roundByStep(const Decimal& value, const Decimal& base) const; | |
| 110 | |
| 111 const Decimal m_maximum; // maximum must be >= minimum. | |
| 112 const Decimal m_minimum; | |
| 113 const Decimal m_step; | |
| 114 const Decimal m_stepBase; | |
| 115 const StepDescription m_stepDescription; | |
| 116 const bool m_hasStep; | |
| 117 }; | |
| 118 | |
| 119 } | |
| 120 | |
| 121 #endif // StepRange_h | |
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Chromium Code Reviews
Issue 24246011:
Move form-related 78 files to core/html/forms/. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk