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      1 /*
      2  * Copyright (C) 2012 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
      6  * are met:
      7  * 1.  Redistributions of source code must retain the above copyright
      8  *     notice, this list of conditions and the following disclaimer.
      9  * 2.  Redistributions in binary form must reproduce the above copyright
     10  *     notice, this list of conditions and the following disclaimer in the
     11  *     documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
     14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     16  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
     17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     19  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
     20  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     23  * SUCH DAMAGE.
     24  */
     25 
     26 #ifndef DateTimeNumericFieldElement_h
     27 #define DateTimeNumericFieldElement_h
     28 
     29 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
     30 #include "core/html/shadow/DateTimeFieldElement.h"
     31 
     32 #include "wtf/text/StringBuilder.h"
     33 #include "wtf/text/WTFString.h"
     34 
     35 namespace WebCore {
     36 
     37 // DateTimeNumericFieldElement represents numeric field of date time format,
     38 // such as:
     39 //  - hour
     40 //  - minute
     41 //  - millisecond
     42 //  - second
     43 //  - year
     44 class DateTimeNumericFieldElement : public DateTimeFieldElement {
     45     WTF_MAKE_NONCOPYABLE(DateTimeNumericFieldElement);
     46 
     47 public:
     48     struct Step {
     49         Step(int step = 1, int stepBase = 0) : step(step), stepBase(stepBase) { }
     50         int step;
     51         int stepBase;
     52     };
     53 
     54     struct Range {
     55         Range(int minimum, int maximum) : minimum(minimum), maximum(maximum) { }
     56         int clampValue(int) const;
     57         bool isInRange(int) const;
     58         bool isSingleton() const { return minimum == maximum; }
     59 
     60         int minimum;
     61         int maximum;
     62     };
     63 
     64 protected:
     65     DateTimeNumericFieldElement(Document*, FieldOwner&, const Range&, const Range& hardLimits, const String& placeholder, const Step& = Step());
     66 
     67     int clampValue(int value) const { return m_range.clampValue(value); }
     68     virtual int defaultValueForStepDown() const;
     69     virtual int defaultValueForStepUp() const;
     70     const Range& range() const { return m_range; }
     71 
     72     // DateTimeFieldElement functions.
     73     virtual bool hasValue() const OVERRIDE FINAL;
     74     void initialize(const AtomicString& pseudo, const String& axHelpText);
     75     int maximum() const;
     76     virtual void setEmptyValue(EventBehavior = DispatchNoEvent) OVERRIDE FINAL;
     77     virtual void setValueAsInteger(int, EventBehavior = DispatchNoEvent) OVERRIDE;
     78     virtual int valueAsInteger() const OVERRIDE FINAL;
     79     virtual String visibleValue() const OVERRIDE FINAL;
     80 
     81 private:
     82     // DateTimeFieldElement functions.
     83     virtual void didBlur() OVERRIDE FINAL;
     84     virtual void handleKeyboardEvent(KeyboardEvent*) OVERRIDE FINAL;
     85     virtual float maximumWidth(const Font&) OVERRIDE;
     86     virtual void stepDown() OVERRIDE FINAL;
     87     virtual void stepUp() OVERRIDE FINAL;
     88     virtual String value() const OVERRIDE FINAL;
     89 
     90     String formatValue(int) const;
     91     int roundUp(int) const;
     92     int roundDown(int) const;
     93     int typeAheadValue() const;
     94 
     95     DOMTimeStamp m_lastDigitCharTime;
     96     const String m_placeholder;
     97     const Range m_range;
     98     const Range m_hardLimits;
     99     const Step m_step;
    100     int m_value;
    101     bool m_hasValue;
    102     mutable StringBuilder m_typeAheadBuffer;
    103 };
    104 
    105 } // namespace WebCore
    106 
    107 #endif
    108 #endif
    109