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      1 /*
      2  * Copyright (C) 2006, 2008, 2010 Apple Inc. All rights reserved.
      3  * Copyright (C) 2010 Google Inc. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef SpinButtonElement_h
     28 #define SpinButtonElement_h
     29 
     30 #include "core/html/HTMLDivElement.h"
     31 #include "core/page/PopupOpeningObserver.h"
     32 #include "platform/Timer.h"
     33 
     34 namespace blink {
     35 
     36 class SpinButtonElement FINAL : public HTMLDivElement, public PopupOpeningObserver {
     37 public:
     38     enum UpDownState {
     39         Indeterminate, // Hovered, but the event is not handled.
     40         Down,
     41         Up,
     42     };
     43     enum EventDispatch {
     44         EventDispatchAllowed,
     45         EventDispatchDisallowed,
     46     };
     47     class SpinButtonOwner : public WillBeGarbageCollectedMixin {
     48     public:
     49         virtual ~SpinButtonOwner() { }
     50         virtual void focusAndSelectSpinButtonOwner() = 0;
     51         virtual bool shouldSpinButtonRespondToMouseEvents() = 0;
     52         virtual bool shouldSpinButtonRespondToWheelEvents() = 0;
     53         virtual void spinButtonDidReleaseMouseCapture(EventDispatch) = 0;
     54         virtual void spinButtonStepDown() = 0;
     55         virtual void spinButtonStepUp() = 0;
     56     };
     57 
     58     // The owner of SpinButtonElement must call removeSpinButtonOwner
     59     // because SpinButtonElement can be outlive SpinButtonOwner
     60     // implementation, e.g. during event handling.
     61     static PassRefPtrWillBeRawPtr<SpinButtonElement> create(Document&, SpinButtonOwner&);
     62     UpDownState upDownState() const { return m_upDownState; }
     63     void releaseCapture(EventDispatch = EventDispatchAllowed);
     64     void removeSpinButtonOwner() { m_spinButtonOwner = nullptr; }
     65 
     66     void step(int amount);
     67 
     68     virtual bool willRespondToMouseMoveEvents() OVERRIDE;
     69     virtual bool willRespondToMouseClickEvents() OVERRIDE;
     70 
     71     void forwardEvent(Event*);
     72 
     73     virtual void trace(Visitor*) OVERRIDE;
     74 
     75 private:
     76     SpinButtonElement(Document&, SpinButtonOwner&);
     77 
     78     virtual void detach(const AttachContext&) OVERRIDE;
     79     virtual bool isSpinButtonElement() const OVERRIDE { return true; }
     80     virtual bool isDisabledFormControl() const OVERRIDE { return shadowHost() && shadowHost()->isDisabledFormControl(); }
     81     virtual bool matchesReadOnlyPseudoClass() const OVERRIDE;
     82     virtual bool matchesReadWritePseudoClass() const OVERRIDE;
     83     virtual void defaultEventHandler(Event*) OVERRIDE;
     84     virtual void willOpenPopup() OVERRIDE;
     85     void doStepAction(int);
     86     void startRepeatingTimer();
     87     void stopRepeatingTimer();
     88     void repeatingTimerFired(Timer<SpinButtonElement>*);
     89     virtual void setHovered(bool = true) OVERRIDE;
     90     bool shouldRespondToMouseEvents();
     91     virtual bool isMouseFocusable() const OVERRIDE { return false; }
     92 
     93     RawPtrWillBeMember<SpinButtonOwner> m_spinButtonOwner;
     94     bool m_capturing;
     95     UpDownState m_upDownState;
     96     UpDownState m_pressStartingState;
     97     Timer<SpinButtonElement> m_repeatingTimer;
     98 };
     99 
    100 DEFINE_TYPE_CASTS(SpinButtonElement, Node, node, toElement(node)->isSpinButtonElement(), toElement(node).isSpinButtonElement());
    101 
    102 } // namespace
    103 
    104 #endif
    105