Source/core/html/BaseMultipleFieldsDateAndTimeInputType.cpp

/*
 * Copyright (C) 2010 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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#include "config.h"
#if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
#include "core/html/BaseMultipleFieldsDateAndTimeInputType.h"

#include "CSSValueKeywords.h"
#include "RuntimeEnabledFeatures.h"
#include "core/dom/KeyboardEvent.h"
#include "core/dom/shadow/ShadowRoot.h"
#include "core/html/DateTimeFieldsState.h"
#include "core/html/FormController.h"
#include "core/html/HTMLDataListElement.h"
#include "core/html/HTMLInputElement.h"
#include "core/html/HTMLOptionElement.h"
#include "core/html/shadow/PickerIndicatorElement.h"
#include "core/html/shadow/ShadowElementNames.h"
#include "core/page/FocusController.h"
#include "core/page/Page.h"
#include "core/platform/DateComponents.h"
#include "core/platform/LocalizedStrings.h"
#include "core/platform/text/DateTimeFormat.h"
#include "core/platform/text/PlatformLocale.h"
#include "core/rendering/RenderTheme.h"
#include <wtf/DateMath.h>

namespace WebCore {

class DateTimeFormatValidator : public DateTimeFormat::TokenHandler {
public:
    DateTimeFormatValidator()
        : m_hasYear(false)
        , m_hasMonth(false)
        , m_hasWeek(false)
        , m_hasDay(false)
        , m_hasAMPM(false)
        , m_hasHour(false)
        , m_hasMinute(false)
        , m_hasSecond(false) { }

    virtual void visitField(DateTimeFormat::FieldType, int) OVERRIDE FINAL;
    virtual void visitLiteral(const String&) OVERRIDE FINAL { }

    bool validateFormat(const String& format, const BaseMultipleFieldsDateAndTimeInputType&);

private:
    bool m_hasYear;
    bool m_hasMonth;
    bool m_hasWeek;
    bool m_hasDay;
    bool m_hasAMPM;
    bool m_hasHour;
    bool m_hasMinute;
    bool m_hasSecond;
};

void DateTimeFormatValidator::visitField(DateTimeFormat::FieldType fieldType, int)
{
    switch (fieldType) {
    case DateTimeFormat::FieldTypeYear:
        m_hasYear = true;
        break;
    case DateTimeFormat::FieldTypeMonth: // Fallthrough.
    case DateTimeFormat::FieldTypeMonthStandAlone:
        m_hasMonth = true;
        break;
    case DateTimeFormat::FieldTypeWeekOfYear:
        m_hasWeek = true;
        break;
    case DateTimeFormat::FieldTypeDayOfMonth:
        m_hasDay = true;
        break;
    case DateTimeFormat::FieldTypePeriod:
        m_hasAMPM = true;
        break;
    case DateTimeFormat::FieldTypeHour11: // Fallthrough.
    case DateTimeFormat::FieldTypeHour12:
        m_hasHour = true;
        break;
    case DateTimeFormat::FieldTypeHour23: // Fallthrough.
    case DateTimeFormat::FieldTypeHour24:
        m_hasHour = true;
        m_hasAMPM = true;
        break;
    case DateTimeFormat::FieldTypeMinute:
        m_hasMinute = true;
        break;
    case DateTimeFormat::FieldTypeSecond:
        m_hasSecond = true;
        break;
    default:
        break;
    }
}

bool DateTimeFormatValidator::validateFormat(const String& format, const BaseMultipleFieldsDateAndTimeInputType& inputType)
{
    if (!DateTimeFormat::parse(format, *this))
        return false;
    return inputType.isValidFormat(m_hasYear, m_hasMonth, m_hasWeek, m_hasDay, m_hasAMPM, m_hasHour, m_hasMinute, m_hasSecond);
}

DateTimeEditElement* BaseMultipleFieldsDateAndTimeInputType::dateTimeEditElement() const
{
    return toDateTimeEditElement(elementById(ShadowElementNames::dateTimeEdit()));
}

SpinButtonElement* BaseMultipleFieldsDateAndTimeInputType::spinButtonElement() const
{
    return toSpinButtonElement(elementById(ShadowElementNames::spinButton()));
}

ClearButtonElement* BaseMultipleFieldsDateAndTimeInputType::clearButtonElement() const
{
    return toClearButtonElement(elementById(ShadowElementNames::clearButton()));
}

PickerIndicatorElement* BaseMultipleFieldsDateAndTimeInputType::pickerIndicatorElement() const
{
    return toPickerIndicatorElement(elementById(ShadowElementNames::pickerIndicator()));
}

void BaseMultipleFieldsDateAndTimeInputType::didBlurFromControl()
{
    // We don't need to call blur(). This function is called when control
    // lost focus.

    RefPtr<HTMLInputElement> protector(element());
    // Remove focus ring by CSS "focus" pseudo class.
    element()->setFocus(false);
}

void BaseMultipleFieldsDateAndTimeInputType::didFocusOnControl()
{
    // We don't need to call focus(). This function is called when control
    // got focus.

    // Add focus ring by CSS "focus" pseudo class.
    // FIXME: Setting the focus flag to non-focused element is too tricky.
    element()->setFocus(true);
}

void BaseMultipleFieldsDateAndTimeInputType::editControlValueChanged()
{
    RefPtr<HTMLInputElement> input(element());
    String oldValue = input->value();
    String newValue = sanitizeValue(dateTimeEditElement()->value());
    // Even if oldValue is null and newValue is "", we should assume they are same.
    if ((oldValue.isEmpty() && newValue.isEmpty()) || oldValue == newValue)
        input->setNeedsValidityCheck();
    else {
        input->setValueInternal(newValue, DispatchNoEvent);
        input->setNeedsStyleRecalc();
        input->dispatchFormControlInputEvent();
        input->dispatchFormControlChangeEvent();
    }
    input->notifyFormStateChanged();
    input->updateClearButtonVisibility();
}

bool BaseMultipleFieldsDateAndTimeInputType::hasCustomFocusLogic() const
{
    return false;
}

bool BaseMultipleFieldsDateAndTimeInputType::isEditControlOwnerDisabled() const
{
    return element()->isDisabledFormControl();
}

bool BaseMultipleFieldsDateAndTimeInputType::isEditControlOwnerReadOnly() const
{
    return element()->isReadOnly();
}

void BaseMultipleFieldsDateAndTimeInputType::focusAndSelectSpinButtonOwner()
{
    if (DateTimeEditElement* edit = dateTimeEditElement())
        edit->focusIfNoFocus();
}

bool BaseMultipleFieldsDateAndTimeInputType::shouldSpinButtonRespondToMouseEvents()
{
    return !element()->isDisabledOrReadOnly();
}

bool BaseMultipleFieldsDateAndTimeInputType::shouldSpinButtonRespondToWheelEvents()
{
    if (!shouldSpinButtonRespondToMouseEvents())
        return false;
    if (DateTimeEditElement* edit = dateTimeEditElement())
        return edit->hasFocusedField();
    return false;
}

void BaseMultipleFieldsDateAndTimeInputType::spinButtonStepDown()
{
    if (DateTimeEditElement* edit = dateTimeEditElement())
        edit->stepDown();
}

void BaseMultipleFieldsDateAndTimeInputType::spinButtonStepUp()
{
    if (DateTimeEditElement* edit = dateTimeEditElement())
        edit->stepUp();
}

bool BaseMultipleFieldsDateAndTimeInputType::isPickerIndicatorOwnerDisabledOrReadOnly() const
{
    return element()->isDisabledOrReadOnly();
}

void BaseMultipleFieldsDateAndTimeInputType::pickerIndicatorChooseValue(const String& value)
{
    if (element()->isValidValue(value)) {
        element()->setValue(value, DispatchInputAndChangeEvent);
        return;
    }

    DateTimeEditElement* edit = this->dateTimeEditElement();
    if (!edit)
        return;
    DateComponents date;
    unsigned end;
    if (date.parseDate(value.characters(), value.length(), 0, end) && end == value.length())
        edit->setOnlyYearMonthDay(date);
}

bool BaseMultipleFieldsDateAndTimeInputType::setupDateTimeChooserParameters(DateTimeChooserParameters& parameters)
{
    return element()->setupDateTimeChooserParameters(parameters);
}

BaseMultipleFieldsDateAndTimeInputType::BaseMultipleFieldsDateAndTimeInputType(HTMLInputElement* element)
    : BaseDateAndTimeInputType(element)
    , m_isDestroyingShadowSubtree(false)
    , m_pickerIndicatorIsVisible(false)
    , m_pickerIndicatorIsAlwaysVisible(false)
{
}

BaseMultipleFieldsDateAndTimeInputType::~BaseMultipleFieldsDateAndTimeInputType()
{
    if (SpinButtonElement* element = spinButtonElement())
        element->removeSpinButtonOwner();
    if (ClearButtonElement* element = clearButtonElement())
        element->removeClearButtonOwner();
    if (DateTimeEditElement* element = dateTimeEditElement())
        element->removeEditControlOwner();
    if (PickerIndicatorElement* element = pickerIndicatorElement())
        element->removePickerIndicatorOwner();
}

String BaseMultipleFieldsDateAndTimeInputType::badInputText() const
{
    return validationMessageBadInputForDateTimeText();
}

void BaseMultipleFieldsDateAndTimeInputType::blur()
{
    if (DateTimeEditElement* edit = dateTimeEditElement())
        edit->blurByOwner();
}

PassRefPtr<RenderStyle> BaseMultipleFieldsDateAndTimeInputType::customStyleForRenderer(PassRefPtr<RenderStyle> originalStyle)
{
    EDisplay originalDisplay = originalStyle->display();
    EDisplay newDisplay = originalDisplay;
    if (originalDisplay == INLINE || originalDisplay == INLINE_BLOCK)
        newDisplay = INLINE_FLEX;
    else if (originalDisplay == BLOCK)
        newDisplay = FLEX;
    TextDirection contentDirection = element()->locale().isRTL() ? RTL : LTR;
    if (originalStyle->direction() == contentDirection && originalDisplay == newDisplay)
        return originalStyle;

    RefPtr<RenderStyle> style = RenderStyle::clone(originalStyle.get());
    style->setDirection(contentDirection);
    style->setDisplay(newDisplay);
    return style.release();
}

void BaseMultipleFieldsDateAndTimeInputType::createShadowSubtree()
{
    ASSERT(element()->shadow());

    // Element must not be attached here, because if it was attached
    // DateTimeEditElement::customStyleForRenderer() is called in appendChild()
    // before the field wrapper element is created.
    ASSERT(!element()->attached());

    Document* document = element()->document();
    ContainerNode* container = element()->userAgentShadowRoot();

    container->appendChild(DateTimeEditElement::create(document, *this));
    updateInnerTextValue();
    container->appendChild(ClearButtonElement::create(document, *this));
    container->appendChild(SpinButtonElement::create(document, *this));

    bool shouldAddPickerIndicator = false;
    if (InputType::themeSupportsDataListUI(this))
        shouldAddPickerIndicator = true;
    RefPtr<RenderTheme> theme = document->page() ? document->page()->theme() : RenderTheme::defaultTheme();
    if (theme->supportsCalendarPicker(formControlType())) {
        shouldAddPickerIndicator = true;
        m_pickerIndicatorIsAlwaysVisible = true;
    }
    if (shouldAddPickerIndicator) {
        container->appendChild(PickerIndicatorElement::create(document, *this));
        m_pickerIndicatorIsVisible = true;
        updatePickerIndicatorVisibility();
    }
}

void BaseMultipleFieldsDateAndTimeInputType::destroyShadowSubtree()
{
    ASSERT(!m_isDestroyingShadowSubtree);
    m_isDestroyingShadowSubtree = true;
    if (SpinButtonElement* element = spinButtonElement())
        element->removeSpinButtonOwner();
    if (ClearButtonElement* element = clearButtonElement())
        element->removeClearButtonOwner();
    if (DateTimeEditElement* element = dateTimeEditElement())
        element->removeEditControlOwner();
    if (PickerIndicatorElement* element = pickerIndicatorElement())
        element->removePickerIndicatorOwner();

    // If a field element has focus, set focus back to the <input> itself before
    // deleting the field. This prevents unnecessary focusout/blur events.
    if (element()->focused())
        element()->focus();

    BaseDateAndTimeInputType::destroyShadowSubtree();
    m_isDestroyingShadowSubtree = false;
}

void BaseMultipleFieldsDateAndTimeInputType::handleFocusEvent(Node* oldFocusedNode, FocusDirection direction)
{
    DateTimeEditElement* edit = dateTimeEditElement();
    if (!edit || m_isDestroyingShadowSubtree)
        return;
    if (direction == FocusDirectionBackward) {
        if (element()->document()->page())
            element()->document()->page()->focusController()->advanceFocus(direction, 0);
    } else if (direction == FocusDirectionNone) {
        edit->focusByOwner(oldFocusedNode);
    } else
        edit->focusByOwner();
}

void BaseMultipleFieldsDateAndTimeInputType::forwardEvent(Event* event)
{
    if (SpinButtonElement* element = spinButtonElement()) {
        element->forwardEvent(event);
        if (event->defaultHandled())
            return;
    }
        
    if (DateTimeEditElement* edit = dateTimeEditElement())
        edit->defaultEventHandler(event);
}

void BaseMultipleFieldsDateAndTimeInputType::disabledAttributeChanged()
{
    spinButtonElement()->releaseCapture();
    clearButtonElement()->releaseCapture();
    if (DateTimeEditElement* edit = dateTimeEditElement())
        edit->disabledStateChanged();
}

void BaseMultipleFieldsDateAndTimeInputType::requiredAttributeChanged()
{
    clearButtonElement()->releaseCapture();
    updateClearButtonVisibility();
}

void BaseMultipleFieldsDateAndTimeInputType::handleKeydownEvent(KeyboardEvent* event)
{
    Document* document = element()->document();
    RefPtr<RenderTheme> theme = document->page() ? document->page()->theme() : RenderTheme::defaultTheme();
    if (m_pickerIndicatorIsVisible
        && ((event->keyIdentifier() == "Down" && event->getModifierState("Alt")) || (theme->shouldOpenPickerWithF4Key() && event->keyIdentifier() == "F4"))) {
        if (PickerIndicatorElement* element = pickerIndicatorElement())
            element->openPopup();
        event->setDefaultHandled();
    } else
        forwardEvent(event);
}

bool BaseMultipleFieldsDateAndTimeInputType::hasBadInput() const
{
    DateTimeEditElement* edit = dateTimeEditElement();
    return element()->value().isEmpty() && edit && edit->anyEditableFieldsHaveValues();
}

bool BaseMultipleFieldsDateAndTimeInputType::isKeyboardFocusable(KeyboardEvent*) const
{
    return element()->isFocusable();
}

bool BaseMultipleFieldsDateAndTimeInputType::isMouseFocusable() const
{
    return element()->isFocusable();
}

AtomicString BaseMultipleFieldsDateAndTimeInputType::localeIdentifier() const
{
    return element()->computeInheritedLanguage();
}

void BaseMultipleFieldsDateAndTimeInputType::minOrMaxAttributeChanged()
{
    updateInnerTextValue();
}

void BaseMultipleFieldsDateAndTimeInputType::readonlyAttributeChanged()
{
    spinButtonElement()->releaseCapture();
    clearButtonElement()->releaseCapture();
    if (DateTimeEditElement* edit = dateTimeEditElement())
        edit->readOnlyStateChanged();
}

void BaseMultipleFieldsDateAndTimeInputType::restoreFormControlState(const FormControlState& state)
{
    DateTimeEditElement* edit = dateTimeEditElement();
    if (!edit)
        return;
    DateTimeFieldsState dateTimeFieldsState = DateTimeFieldsState::restoreFormControlState(state);
    edit->setValueAsDateTimeFieldsState(dateTimeFieldsState);
    element()->setValueInternal(sanitizeValue(edit->value()), DispatchNoEvent);
    updateClearButtonVisibility();
}

FormControlState BaseMultipleFieldsDateAndTimeInputType::saveFormControlState() const
{
    if (DateTimeEditElement* edit = dateTimeEditElement())
        return edit->valueAsDateTimeFieldsState().saveFormControlState();
    return FormControlState();
}

void BaseMultipleFieldsDateAndTimeInputType::setValue(const String& sanitizedValue, bool valueChanged, TextFieldEventBehavior eventBehavior)
{
    InputType::setValue(sanitizedValue, valueChanged, eventBehavior);
    DateTimeEditElement* edit = dateTimeEditElement();
    if (valueChanged || (sanitizedValue.isEmpty() && edit && edit->anyEditableFieldsHaveValues())) {
        updateInnerTextValue();
        element()->setNeedsValidityCheck();
    }
}

bool BaseMultipleFieldsDateAndTimeInputType::shouldUseInputMethod() const
{
    return false;
}

void BaseMultipleFieldsDateAndTimeInputType::stepAttributeChanged()
{
    updateInnerTextValue();
}

void BaseMultipleFieldsDateAndTimeInputType::updateInnerTextValue()
{
    DateTimeEditElement* edit = dateTimeEditElement();
    if (!edit)
        return;

    DateTimeEditElement::LayoutParameters layoutParameters(element()->locale(), createStepRange(AnyIsDefaultStep));

    DateComponents date;
    const bool hasValue = parseToDateComponents(element()->value(), &date);
    if (!hasValue)
        setMillisecondToDateComponents(layoutParameters.stepRange.minimum().toDouble(), &date);

    setupLayoutParameters(layoutParameters, date);

    const AtomicString pattern = edit->fastGetAttribute(HTMLNames::patternAttr);
    if (!pattern.isEmpty())
        layoutParameters.dateTimeFormat = pattern;

    if (!DateTimeFormatValidator().validateFormat(layoutParameters.dateTimeFormat, *this))
        layoutParameters.dateTimeFormat = layoutParameters.fallbackDateTimeFormat;

    if (hasValue)
        edit->setValueAsDate(layoutParameters, date);
    else
        edit->setEmptyValue(layoutParameters, date);
    updateClearButtonVisibility();
}

void BaseMultipleFieldsDateAndTimeInputType::valueAttributeChanged()
{
    if (!element()->hasDirtyValue())
        updateInnerTextValue();
}

void BaseMultipleFieldsDateAndTimeInputType::listAttributeTargetChanged()
{
    updatePickerIndicatorVisibility();
}

void BaseMultipleFieldsDateAndTimeInputType::updatePickerIndicatorVisibility()
{
    if (m_pickerIndicatorIsAlwaysVisible) {
        showPickerIndicator();
        return;
    }
    if (RuntimeEnabledFeatures::dataListElementEnabled()) {
        if (HTMLDataListElement* dataList = element()->dataList()) {
            RefPtr<HTMLCollection> options = dataList->options();
            for (unsigned i = 0; HTMLOptionElement* option = toHTMLOptionElement(options->item(i)); ++i) {
                if (element()->isValidValue(option->value())) {
                    showPickerIndicator();
                    return;
                }
            }
        }
        hidePickerIndicator();
    }
}

void BaseMultipleFieldsDateAndTimeInputType::hidePickerIndicator()
{
    if (!m_pickerIndicatorIsVisible)
        return;
    m_pickerIndicatorIsVisible = false;
    ASSERT(pickerIndicatorElement());
    pickerIndicatorElement()->setInlineStyleProperty(CSSPropertyDisplay, CSSValueNone);
}

void BaseMultipleFieldsDateAndTimeInputType::showPickerIndicator()
{
    if (m_pickerIndicatorIsVisible)
        return;
    m_pickerIndicatorIsVisible = true;
    ASSERT(pickerIndicatorElement());
    pickerIndicatorElement()->removeInlineStyleProperty(CSSPropertyDisplay);
}

bool BaseMultipleFieldsDateAndTimeInputType::shouldHaveSecondField(const DateComponents& date) const
{
    StepRange stepRange = createStepRange(AnyIsDefaultStep);
    return date.second() || date.millisecond()
        || !stepRange.minimum().remainder(static_cast<int>(msPerMinute)).isZero()
        || !stepRange.step().remainder(static_cast<int>(msPerMinute)).isZero();
}

void BaseMultipleFieldsDateAndTimeInputType::focusAndSelectClearButtonOwner()
{
    element()->focus();
}

bool BaseMultipleFieldsDateAndTimeInputType::shouldClearButtonRespondToMouseEvents()
{
    return !element()->isDisabledOrReadOnly() && !element()->isRequired();
}

void BaseMultipleFieldsDateAndTimeInputType::clearValue()
{
    RefPtr<HTMLInputElement> input(element());
    input->setValue("", DispatchInputAndChangeEvent);
    input->updateClearButtonVisibility();
}

void BaseMultipleFieldsDateAndTimeInputType::updateClearButtonVisibility()
{
    ClearButtonElement* clearButton = clearButtonElement();
    if (!clearButton)
        return;

    if (element()->isRequired() || !dateTimeEditElement()->anyEditableFieldsHaveValues())
        clearButton->setInlineStyleProperty(CSSPropertyVisibility, CSSValueHidden);
    else
        clearButton->removeInlineStyleProperty(CSSPropertyVisibility);
}

} // namespace WebCore

#endif