root/Source/core/html/shadow/DateTimeFieldElement.cpp

DEFINITIONS

1. emptyValueAXText
2. m_fieldOwner
3. defaultEventHandler
4. defaultKeyboardEventHandler
5. setFocus
6. focusOnNextField
7. initialize
8. isDateTimeFieldElement
9. isFieldOwnerDisabled
10. isFieldOwnerReadOnly
11. isDisabled
12. localeForOwner
13. localeIdentifier
14. maximumWidth
15. setDisabled
16. supportsFocus
17. updateVisibleValue
18. valueForARIAValueNow

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "config.h"
#if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
#include "core/html/shadow/DateTimeFieldElement.h"

#include "HTMLNames.h"
#include "core/dom/Text.h"
#include "core/events/KeyboardEvent.h"
#include "platform/text/PlatformLocale.h"
#include "wtf/text/WTFString.h"

namespace WebCore {

using namespace HTMLNames;

static String emptyValueAXText()
{
    return Locale::defaultLocale().queryString(blink::WebLocalizedString::AXDateTimeFieldEmptyValueText);
}

DateTimeFieldElement::FieldOwner::~FieldOwner()
{
}

DateTimeFieldElement::DateTimeFieldElement(Document& document, FieldOwner& fieldOwner)
    : HTMLSpanElement(document)
    , m_fieldOwner(&fieldOwner)
{
}

void DateTimeFieldElement::defaultEventHandler(Event* event)
{
    if (event->isKeyboardEvent()) {
        KeyboardEvent* keyboardEvent = toKeyboardEvent(event);
        if (!isDisabled() && !isFieldOwnerDisabled() && !isFieldOwnerReadOnly()) {
            handleKeyboardEvent(keyboardEvent);
            if (keyboardEvent->defaultHandled())
                return;
        }
        defaultKeyboardEventHandler(keyboardEvent);
        if (keyboardEvent->defaultHandled())
            return;
    }

    HTMLElement::defaultEventHandler(event);
}

void DateTimeFieldElement::defaultKeyboardEventHandler(KeyboardEvent* keyboardEvent)
{
    if (keyboardEvent->type() != EventTypeNames::keydown)
        return;

    if (isDisabled() || isFieldOwnerDisabled())
        return;

    const String& keyIdentifier = keyboardEvent->keyIdentifier();

    if (keyIdentifier == "Left") {
        if (!m_fieldOwner)
            return;
        // FIXME: We'd like to use FocusController::advanceFocus(FocusDirectionLeft, ...)
        // but it doesn't work for shadow nodes. webkit.org/b/104650
        if (!localeForOwner().isRTL() && m_fieldOwner->focusOnPreviousField(*this))
            keyboardEvent->setDefaultHandled();
        return;
    }

    if (keyIdentifier == "Right") {
        if (!m_fieldOwner)
            return;
        // FIXME: We'd like to use FocusController::advanceFocus(FocusDirectionRight, ...)
        // but it doesn't work for shadow nodes. webkit.org/b/104650
        if (!localeForOwner().isRTL() && m_fieldOwner->focusOnNextField(*this))
            keyboardEvent->setDefaultHandled();
        return;
    }

    if (isFieldOwnerReadOnly())
        return;

    if (keyIdentifier == "Down") {
        if (keyboardEvent->getModifierState("Alt"))
            return;
        keyboardEvent->setDefaultHandled();
        stepDown();
        return;
    }

    if (keyIdentifier == "Up") {
        keyboardEvent->setDefaultHandled();
        stepUp();
        return;
    }

    if (keyIdentifier == "U+0008" || keyIdentifier == "U+007F") {
        keyboardEvent->setDefaultHandled();
        setEmptyValue(DispatchEvent);
        return;
    }
}

void DateTimeFieldElement::setFocus(bool value)
{
    if (m_fieldOwner)
        value ? m_fieldOwner->didFocusOnField() : m_fieldOwner->didBlurFromField();
    ContainerNode::setFocus(value);
}

void DateTimeFieldElement::focusOnNextField()
{
    if (!m_fieldOwner)
        return;
    m_fieldOwner->focusOnNextField(*this);
}

void DateTimeFieldElement::initialize(const AtomicString& pseudo, const String& axHelpText, int axMinimum, int axMaximum)
{
    // On accessibility, DateTimeFieldElement acts like spin button.
    setAttribute(roleAttr, AtomicString("spinbutton", AtomicString::ConstructFromLiteral));
    setAttribute(aria_valuetextAttr, AtomicString(emptyValueAXText()));
    setAttribute(aria_valueminAttr, AtomicString::number(axMinimum));
    setAttribute(aria_valuemaxAttr, AtomicString::number(axMaximum));

    setAttribute(aria_helpAttr, AtomicString(axHelpText));
    setShadowPseudoId(pseudo);
    appendChild(Text::create(document(), visibleValue()));
}

bool DateTimeFieldElement::isDateTimeFieldElement() const
{
    return true;
}

bool DateTimeFieldElement::isFieldOwnerDisabled() const
{
    return m_fieldOwner && m_fieldOwner->isFieldOwnerDisabled();
}

bool DateTimeFieldElement::isFieldOwnerReadOnly() const
{
    return m_fieldOwner && m_fieldOwner->isFieldOwnerReadOnly();
}

bool DateTimeFieldElement::isDisabled() const
{
    return fastHasAttribute(disabledAttr);
}

Locale& DateTimeFieldElement::localeForOwner() const
{
    return document().getCachedLocale(localeIdentifier());
}

AtomicString DateTimeFieldElement::localeIdentifier() const
{
    return m_fieldOwner ? m_fieldOwner->localeIdentifier() : nullAtom;
}

float DateTimeFieldElement::maximumWidth(const Font&)
{
    const float paddingLeftAndRight = 2; // This should match to html.css.
    return paddingLeftAndRight;
}

void DateTimeFieldElement::setDisabled()
{
    // Set HTML attribute disabled to change apperance.
    setBooleanAttribute(disabledAttr, true);
    setNeedsStyleRecalc(SubtreeStyleChange);
}

bool DateTimeFieldElement::supportsFocus() const
{
    return !isDisabled() && !isFieldOwnerDisabled();
}

void DateTimeFieldElement::updateVisibleValue(EventBehavior eventBehavior)
{
    Text* const textNode = toText(firstChild());
    const String newVisibleValue = visibleValue();
    ASSERT(newVisibleValue.length() > 0);

    if (textNode->wholeText() == newVisibleValue)
        return;

    textNode->replaceWholeText(newVisibleValue);
    if (hasValue()) {
        setAttribute(aria_valuetextAttr, AtomicString(newVisibleValue));
        setAttribute(aria_valuenowAttr, AtomicString::number(valueForARIAValueNow()));
    } else {
        setAttribute(aria_valuetextAttr, AtomicString(emptyValueAXText()));
        removeAttribute(aria_valuenowAttr);
    }

    if (eventBehavior == DispatchEvent && m_fieldOwner)
        m_fieldOwner->fieldValueChanged();
}

int DateTimeFieldElement::valueForARIAValueNow() const
{
    return valueAsInteger();
}

} // namespace WebCore

#endif