Source/core/html/CheckboxInputType.cpp

/*
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 * Copyright (C) 2011 Apple Inc. All rights reserved.
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#include "config.h"
#include "core/html/CheckboxInputType.h"

#include "core/dom/KeyboardEvent.h"
#include "core/html/HTMLInputElement.h"
#include "core/html/InputTypeNames.h"
#include "core/platform/LocalizedStrings.h"
#include "wtf/PassOwnPtr.h"

namespace WebCore {

PassRefPtr<InputType> CheckboxInputType::create(HTMLInputElement* element)
{
    return adoptRef(new CheckboxInputType(element));
}

const AtomicString& CheckboxInputType::formControlType() const
{
    return InputTypeNames::checkbox();
}

bool CheckboxInputType::valueMissing(const String&) const
{
    return element()->isRequired() && !element()->checked();
}

String CheckboxInputType::valueMissingText() const
{
    return validationMessageValueMissingForCheckboxText();
}

void CheckboxInputType::handleKeyupEvent(KeyboardEvent* event)
{
    const String& key = event->keyIdentifier();
    if (key != "U+0020")
        return;
    dispatchSimulatedClickIfActive(event);
}

PassOwnPtr<ClickHandlingState> CheckboxInputType::willDispatchClick()
{
    // An event handler can use preventDefault or "return false" to reverse the checking we do here.
    // The ClickHandlingState object contains what we need to undo what we did here in didDispatchClick.

    OwnPtr<ClickHandlingState> state = adoptPtr(new ClickHandlingState);

    state->checked = element()->checked();
    state->indeterminate = element()->indeterminate();

    if (state->indeterminate)
        element()->setIndeterminate(false);

    element()->setChecked(!state->checked, DispatchChangeEvent);

    return state.release();
}

void CheckboxInputType::didDispatchClick(Event* event, const ClickHandlingState& state)
{
    if (event->defaultPrevented() || event->defaultHandled()) {
        element()->setIndeterminate(state.indeterminate);
        element()->setChecked(state.checked);
    }

    // The work we did in willDispatchClick was default handling.
    event->setDefaultHandled();
}

bool CheckboxInputType::isCheckbox() const
{
    return true;
}

bool CheckboxInputType::supportsIndeterminateAppearance() const
{
    return true;
}

} // namespace WebCore