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      1 /*
      2  * Copyright (C) 2010 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      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
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     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
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     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,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "core/html/forms/BaseDateAndTimeInputType.h"
     33 
     34 #include <limits>
     35 #include "core/html/HTMLInputElement.h"
     36 #include "platform/text/PlatformLocale.h"
     37 #include "wtf/CurrentTime.h"
     38 #include "wtf/DateMath.h"
     39 #include "wtf/MathExtras.h"
     40 #include "wtf/text/WTFString.h"
     41 
     42 namespace WebCore {
     43 
     44 using blink::WebLocalizedString;
     45 using namespace HTMLNames;
     46 
     47 static const int msecPerMinute = 60 * 1000;
     48 static const int msecPerSecond = 1000;
     49 
     50 double BaseDateAndTimeInputType::valueAsDate() const
     51 {
     52     return valueAsDouble();
     53 }
     54 
     55 void BaseDateAndTimeInputType::setValueAsDate(double value, ExceptionState&) const
     56 {
     57     element().setValue(serializeWithMilliseconds(value));
     58 }
     59 
     60 double BaseDateAndTimeInputType::valueAsDouble() const
     61 {
     62     const Decimal value = parseToNumber(element().value(), Decimal::nan());
     63     return value.isFinite() ? value.toDouble() : DateComponents::invalidMilliseconds();
     64 }
     65 
     66 void BaseDateAndTimeInputType::setValueAsDouble(double newValue, TextFieldEventBehavior eventBehavior, ExceptionState& exceptionState) const
     67 {
     68     setValueAsDecimal(Decimal::fromDouble(newValue), eventBehavior, exceptionState);
     69 }
     70 
     71 bool BaseDateAndTimeInputType::typeMismatchFor(const String& value) const
     72 {
     73     return !value.isEmpty() && !parseToDateComponents(value, 0);
     74 }
     75 
     76 bool BaseDateAndTimeInputType::typeMismatch() const
     77 {
     78     return typeMismatchFor(element().value());
     79 }
     80 
     81 String BaseDateAndTimeInputType::rangeOverflowText(const Decimal& maximum) const
     82 {
     83     return locale().queryString(WebLocalizedString::ValidationRangeOverflowDateTime, localizeValue(serialize(maximum)));
     84 }
     85 
     86 String BaseDateAndTimeInputType::rangeUnderflowText(const Decimal& minimum) const
     87 {
     88     return locale().queryString(WebLocalizedString::ValidationRangeUnderflowDateTime, localizeValue(serialize(minimum)));
     89 }
     90 
     91 Decimal BaseDateAndTimeInputType::defaultValueForStepUp() const
     92 {
     93     double ms = currentTimeMS();
     94     double utcOffset = calculateUTCOffset();
     95     double dstOffset = calculateDSTOffset(ms, utcOffset);
     96     int offset = static_cast<int>((utcOffset + dstOffset) / msPerMinute);
     97     return Decimal::fromDouble(ms + (offset * msPerMinute));
     98 }
     99 
    100 bool BaseDateAndTimeInputType::isSteppable() const
    101 {
    102     return true;
    103 }
    104 
    105 Decimal BaseDateAndTimeInputType::parseToNumber(const String& source, const Decimal& defaultValue) const
    106 {
    107     DateComponents date;
    108     if (!parseToDateComponents(source, &date))
    109         return defaultValue;
    110     double msec = date.millisecondsSinceEpoch();
    111     ASSERT(std::isfinite(msec));
    112     return Decimal::fromDouble(msec);
    113 }
    114 
    115 bool BaseDateAndTimeInputType::parseToDateComponents(const String& source, DateComponents* out) const
    116 {
    117     if (source.isEmpty())
    118         return false;
    119     DateComponents ignoredResult;
    120     if (!out)
    121         out = &ignoredResult;
    122     return parseToDateComponentsInternal(source, out);
    123 }
    124 
    125 String BaseDateAndTimeInputType::serialize(const Decimal& value) const
    126 {
    127     if (!value.isFinite())
    128         return String();
    129     DateComponents date;
    130     if (!setMillisecondToDateComponents(value.toDouble(), &date))
    131         return String();
    132     return serializeWithComponents(date);
    133 }
    134 
    135 String BaseDateAndTimeInputType::serializeWithComponents(const DateComponents& date) const
    136 {
    137     Decimal step;
    138     if (!element().getAllowedValueStep(&step))
    139         return date.toString();
    140     if (step.remainder(msecPerMinute).isZero())
    141         return date.toString(DateComponents::None);
    142     if (step.remainder(msecPerSecond).isZero())
    143         return date.toString(DateComponents::Second);
    144     return date.toString(DateComponents::Millisecond);
    145 }
    146 
    147 String BaseDateAndTimeInputType::serializeWithMilliseconds(double value) const
    148 {
    149     return serialize(Decimal::fromDouble(value));
    150 }
    151 
    152 String BaseDateAndTimeInputType::localizeValue(const String& proposedValue) const
    153 {
    154     DateComponents date;
    155     if (!parseToDateComponents(proposedValue, &date))
    156         return proposedValue;
    157 
    158     String localized = element().locale().formatDateTime(date);
    159     return localized.isEmpty() ? proposedValue : localized;
    160 }
    161 
    162 String BaseDateAndTimeInputType::visibleValue() const
    163 {
    164     return localizeValue(element().value());
    165 }
    166 
    167 String BaseDateAndTimeInputType::sanitizeValue(const String& proposedValue) const
    168 {
    169     return typeMismatchFor(proposedValue) ? emptyString() : proposedValue;
    170 }
    171 
    172 bool BaseDateAndTimeInputType::supportsReadOnly() const
    173 {
    174     return true;
    175 }
    176 
    177 bool BaseDateAndTimeInputType::shouldRespectListAttribute()
    178 {
    179     return true;
    180 }
    181 
    182 bool BaseDateAndTimeInputType::valueMissing(const String& value) const
    183 {
    184     return element().isRequired() && value.isEmpty();
    185 }
    186 
    187 bool BaseDateAndTimeInputType::shouldShowFocusRingOnMouseFocus() const
    188 {
    189     return true;
    190 }
    191 
    192 } // namespace WebCore
    193