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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 "MonthInputType.h"
     33 
     34 #include "DateComponents.h"
     35 #include "HTMLInputElement.h"
     36 #include "HTMLNames.h"
     37 #include <wtf/CurrentTime.h>
     38 #include <wtf/DateMath.h>
     39 #include <wtf/MathExtras.h>
     40 #include <wtf/PassOwnPtr.h>
     41 
     42 namespace WebCore {
     43 
     44 using namespace HTMLNames;
     45 
     46 static const double monthDefaultStep = 1.0;
     47 static const double monthStepScaleFactor = 1.0;
     48 
     49 PassOwnPtr<InputType> MonthInputType::create(HTMLInputElement* element)
     50 {
     51     return adoptPtr(new MonthInputType(element));
     52 }
     53 
     54 const AtomicString& MonthInputType::formControlType() const
     55 {
     56     return InputTypeNames::month();
     57 }
     58 
     59 double MonthInputType::valueAsDate() const
     60 {
     61     DateComponents date;
     62     if (!parseToDateComponents(element()->value(), &date))
     63         return DateComponents::invalidMilliseconds();
     64     double msec = date.millisecondsSinceEpoch();
     65     ASSERT(isfinite(msec));
     66     return msec;
     67 }
     68 
     69 void MonthInputType::setValueAsDate(double value, ExceptionCode&) const
     70 {
     71     DateComponents date;
     72     if (!date.setMillisecondsSinceEpochForMonth(value)) {
     73         element()->setValue(String());
     74         return;
     75     }
     76     element()->setValue(date.toString());
     77 }
     78 
     79 double MonthInputType::defaultValueForStepUp() const
     80 {
     81     double current = currentTimeMS();
     82     double utcOffset = calculateUTCOffset();
     83     double dstOffset = calculateDSTOffset(current, utcOffset);
     84     int offset = static_cast<int>((utcOffset + dstOffset) / msPerMinute);
     85     current += offset * msPerMinute;
     86 
     87     DateComponents date;
     88     date.setMillisecondsSinceEpochForMonth(current);
     89     double months = date.monthsSinceEpoch();
     90     ASSERT(isfinite(months));
     91     return months;
     92 }
     93 
     94 double MonthInputType::minimum() const
     95 {
     96     return parseToDouble(element()->fastGetAttribute(minAttr), DateComponents::minimumMonth());
     97 }
     98 
     99 double MonthInputType::maximum() const
    100 {
    101     return parseToDouble(element()->fastGetAttribute(maxAttr), DateComponents::maximumMonth());
    102 }
    103 
    104 double MonthInputType::defaultStep() const
    105 {
    106     return monthDefaultStep;
    107 }
    108 
    109 double MonthInputType::stepScaleFactor() const
    110 {
    111     return monthStepScaleFactor;
    112 }
    113 
    114 bool MonthInputType::parsedStepValueShouldBeInteger() const
    115 {
    116     return true;
    117 }
    118 
    119 double MonthInputType::parseToDouble(const String& src, double defaultValue) const
    120 {
    121     DateComponents date;
    122     if (!parseToDateComponents(src, &date))
    123         return defaultValue;
    124     double months = date.monthsSinceEpoch();
    125     ASSERT(isfinite(months));
    126     return months;
    127 }
    128 
    129 bool MonthInputType::parseToDateComponentsInternal(const UChar* characters, unsigned length, DateComponents* out) const
    130 {
    131     ASSERT(out);
    132     unsigned end;
    133     return out->parseMonth(characters, length, 0, end) && end == length;
    134 }
    135 
    136 bool MonthInputType::setMillisecondToDateComponents(double value, DateComponents* date) const
    137 {
    138     ASSERT(date);
    139     return date->setMonthsSinceEpoch(value);
    140 }
    141 
    142 } // namespace WebCore
    143