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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 DateTimeFieldElement_h
     27 #define DateTimeFieldElement_h
     28 
     29 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
     30 #include "core/html/HTMLDivElement.h"
     31 #include "core/html/HTMLSpanElement.h"
     32 
     33 namespace WebCore {
     34 
     35 class DateComponents;
     36 class DateTimeFieldsState;
     37 class Font;
     38 
     39 // DateTimeFieldElement is base class of date time field element.
     40 class DateTimeFieldElement : public HTMLSpanElement {
     41     WTF_MAKE_NONCOPYABLE(DateTimeFieldElement);
     42 
     43 public:
     44     enum EventBehavior {
     45         DispatchNoEvent,
     46         DispatchEvent,
     47     };
     48 
     49     // FieldOwner implementer must call removeEventHandler when
     50     // it doesn't handle event, e.g. at destruction.
     51     class FieldOwner {
     52     public:
     53         virtual ~FieldOwner();
     54         virtual void didBlurFromField() = 0;
     55         virtual void didFocusOnField() = 0;
     56         virtual void fieldValueChanged() = 0;
     57         virtual bool focusOnNextField(const DateTimeFieldElement&) = 0;
     58         virtual bool focusOnPreviousField(const DateTimeFieldElement&) = 0;
     59         virtual bool isFieldOwnerDisabled() const = 0;
     60         virtual bool isFieldOwnerReadOnly() const = 0;
     61         virtual AtomicString localeIdentifier() const = 0;
     62     };
     63 
     64     virtual void defaultEventHandler(Event*) OVERRIDE;
     65     virtual bool hasValue() const = 0;
     66     bool isDisabled() const;
     67     virtual float maximumWidth(const Font&);
     68     virtual void populateDateTimeFieldsState(DateTimeFieldsState&) = 0;
     69     void removeEventHandler() { m_fieldOwner = 0; }
     70     void setDisabled();
     71     virtual void setEmptyValue(EventBehavior = DispatchNoEvent) = 0;
     72     virtual void setValueAsDate(const DateComponents&) = 0;
     73     virtual void setValueAsDateTimeFieldsState(const DateTimeFieldsState&) = 0;
     74     virtual void setValueAsInteger(int, EventBehavior = DispatchNoEvent) = 0;
     75     virtual void stepDown() = 0;
     76     virtual void stepUp() = 0;
     77     virtual String value() const = 0;
     78     virtual String visibleValue() const = 0;
     79 
     80 protected:
     81     DateTimeFieldElement(Document*, FieldOwner&);
     82     virtual void didBlur();
     83     virtual void didFocus();
     84     void focusOnNextField();
     85     virtual void handleKeyboardEvent(KeyboardEvent*) = 0;
     86     void initialize(const AtomicString& pseudo, const String& axHelpText, int axMinimum, int axMaximum);
     87     Locale& localeForOwner() const;
     88     AtomicString localeIdentifier() const;
     89     void updateVisibleValue(EventBehavior);
     90     virtual int valueAsInteger() const = 0;
     91     virtual int valueForARIAValueNow() const;
     92 
     93 private:
     94     void defaultKeyboardEventHandler(KeyboardEvent*);
     95     virtual bool isDateTimeFieldElement() const OVERRIDE;
     96     bool isFieldOwnerDisabled() const;
     97     bool isFieldOwnerReadOnly() const;
     98     virtual bool supportsFocus() const OVERRIDE FINAL;
     99 
    100     FieldOwner* m_fieldOwner;
    101 };
    102 
    103 } // namespace WebCore
    104 
    105 #endif
    106 #endif
    107