third_party/WebKit/Source/core/html/shadow/DateTimeNumericFieldElement.h

   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/Allocator.h"
  33 #include "wtf/text/StringBuilder.h"
  34 #include "wtf/text/WTFString.h"
  35
  36 namespace blink {
  37
  38 // DateTimeNumericFieldElement represents numeric field of date time format,
  39 // such as:
  40 //  - hour
  41 //  - minute
  42 //  - millisecond
  43 //  - second
  44 //  - year
  45 class DateTimeNumericFieldElement : public DateTimeFieldElement {
  46     WTF_MAKE_NONCOPYABLE(DateTimeNumericFieldElement);
  47
  48 public:
  49     struct Step {
  50         DISALLOW_ALLOCATION();
  51         Step(int step = 1, int stepBase = 0) : step(step), stepBase(stepBase) { }
  52         int step;
  53         int stepBase;
  54     };
  55
  56     struct Range {
  57         DISALLOW_ALLOCATION();
  58         Range(int minimum, int maximum) : minimum(minimum), maximum(maximum) { }
  59         int clampValue(int) const;
  60         bool isInRange(int) const;
  61         bool isSingleton() const { return minimum == maximum; }
  62
  63         int minimum;
  64         int maximum;
  65     };
  66
  67 protected:
  68     DateTimeNumericFieldElement(Document&, FieldOwner&, const Range&, const Range& hardLimits, const String& placeholder, const Step& = Step());
  69
  70     int clampValue(int value) const { return m_range.clampValue(value); }
  71     virtual int defaultValueForStepDown() const;
  72     virtual int defaultValueForStepUp() const;
  73     const Range& range() const { return m_range; }
  74
  75     // DateTimeFieldElement functions.
  76     bool hasValue() const final;
  77     void initialize(const AtomicString& pseudo, const String& axHelpText);
  78     int maximum() const;
  79     void setEmptyValue(EventBehavior = DispatchNoEvent) final;
  80     void setValueAsInteger(int, EventBehavior = DispatchNoEvent) override;
  81     int valueAsInteger() const final;
  82     String visibleValue() const final;
  83
  84 private:
  85     // DateTimeFieldElement functions.
  86     void handleKeyboardEvent(KeyboardEvent*) final;
  87     float maximumWidth(const Font&) override;
  88     void stepDown() final;
  89     void stepUp() final;
  90     String value() const final;
  91
  92     // Node functions.
  93     void setFocus(bool) final;
  94
  95     String formatValue(int) const;
  96     int roundUp(int) const;
  97     int roundDown(int) const;
  98     int typeAheadValue() const;
  99
 100     const String m_placeholder;
 101     const Range m_range;
 102     const Range m_hardLimits;
 103     const Step m_step;
 104     int m_value;
 105     bool m_hasValue;
 106     mutable StringBuilder m_typeAheadBuffer;
 107 };
 108
 109 } // namespace blink
 110
 111 #endif
 112 #endif