1/*
2 * Copyright (C) 2010 Google Inc. All rights reserved.
3 *
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5 * modification, are permitted provided that the following conditions are
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7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
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15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#if ENABLE(INPUT_TYPE_MONTH)
33#include "MonthInputType.h"
34
35#include "DateComponents.h"
36#include "HTMLInputElement.h"
37#include "HTMLNames.h"
38#include "InputTypeNames.h"
39#include <wtf/CurrentTime.h>
40#include <wtf/DateMath.h>
41#include <wtf/MathExtras.h>
42#include <wtf/PassOwnPtr.h>
43
44namespace WebCore {
45
46using namespace HTMLNames;
47
48static const int monthDefaultStep = 1;
49static const int monthDefaultStepBase = 0;
50static const int monthStepScaleFactor = 1;
51
52PassOwnPtr<InputType> MonthInputType::create(HTMLInputElement* element)
53{
54    return adoptPtr(new MonthInputType(element));
55}
56
57void MonthInputType::attach()
58{
59    observeFeatureIfVisible(FeatureObserver::InputTypeMonth);
60}
61
62const AtomicString& MonthInputType::formControlType() const
63{
64    return InputTypeNames::month();
65}
66
67DateComponents::Type MonthInputType::dateType() const
68{
69    return DateComponents::Month;
70}
71
72double MonthInputType::valueAsDate() const
73{
74    DateComponents date;
75    if (!parseToDateComponents(element()->value(), &date))
76        return DateComponents::invalidMilliseconds();
77    double msec = date.millisecondsSinceEpoch();
78    ASSERT(std::isfinite(msec));
79    return msec;
80}
81
82String MonthInputType::serializeWithMilliseconds(double value) const
83{
84    DateComponents date;
85    if (!date.setMillisecondsSinceEpochForMonth(value))
86        return String();
87    return serializeWithComponents(date);
88}
89
90Decimal MonthInputType::defaultValueForStepUp() const
91{
92    double current = currentTimeMS();
93    double utcOffset = calculateUTCOffset();
94    double dstOffset = calculateDSTOffset(current, utcOffset);
95    int offset = static_cast<int>((utcOffset + dstOffset) / msPerMinute);
96    current += offset * msPerMinute;
97
98    DateComponents date;
99    date.setMillisecondsSinceEpochForMonth(current);
100    double months = date.monthsSinceEpoch();
101    ASSERT(std::isfinite(months));
102    return Decimal::fromDouble(months);
103}
104
105StepRange MonthInputType::createStepRange(AnyStepHandling anyStepHandling) const
106{
107    DEFINE_STATIC_LOCAL(const StepRange::StepDescription, stepDescription, (monthDefaultStep, monthDefaultStepBase, monthStepScaleFactor, StepRange::ParsedStepValueShouldBeInteger));
108
109    const Decimal stepBase = parseToNumber(element()->fastGetAttribute(minAttr), Decimal::fromDouble(monthDefaultStepBase));
110    const Decimal minimum = parseToNumber(element()->fastGetAttribute(minAttr), Decimal::fromDouble(DateComponents::minimumMonth()));
111    const Decimal maximum = parseToNumber(element()->fastGetAttribute(maxAttr), Decimal::fromDouble(DateComponents::maximumMonth()));
112    const Decimal step = StepRange::parseStep(anyStepHandling, stepDescription, element()->fastGetAttribute(stepAttr));
113    return StepRange(stepBase, minimum, maximum, step, stepDescription);
114}
115
116Decimal MonthInputType::parseToNumber(const String& src, const Decimal& defaultValue) const
117{
118    DateComponents date;
119    if (!parseToDateComponents(src, &date))
120        return defaultValue;
121    double months = date.monthsSinceEpoch();
122    ASSERT(std::isfinite(months));
123    return Decimal::fromDouble(months);
124}
125
126bool MonthInputType::parseToDateComponentsInternal(const UChar* characters, unsigned length, DateComponents* out) const
127{
128    ASSERT(out);
129    unsigned end;
130    return out->parseMonth(characters, length, 0, end) && end == length;
131}
132
133bool MonthInputType::setMillisecondToDateComponents(double value, DateComponents* date) const
134{
135    ASSERT(date);
136    return date->setMonthsSinceEpoch(value);
137}
138
139bool MonthInputType::isMonthField() const
140{
141    return true;
142}
143
144} // namespace WebCore
145
146#endif
147