ColorInputType.cpp   [plain text]

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 *
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 * in the documentation and/or other materials provided with the
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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
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#include "config.h"
#if ENABLE(INPUT_TYPE_COLOR)
#include "ColorInputType.h"

#include "CSSPropertyNames.h"
#include "Chrome.h"
#include "Color.h"
#include "HTMLDataListElement.h"
#include "HTMLDivElement.h"
#include "HTMLInputElement.h"
#include "HTMLOptionElement.h"
#include "InputTypeNames.h"
#include "MouseEvent.h"
#include "RenderObject.h"
#include "RenderView.h"
#include "ScriptController.h"
#include "ShadowRoot.h"

namespace WebCore {

using namespace HTMLNames;

static bool isValidColorString(const String& value)
{
    if (value.isEmpty())
        return false;
    if (value[0] != '#')
        return false;

    // We don't accept #rgb and #aarrggbb formats.
    if (value.length() != 7)
        return false;
    Color color(value);
    return color.isValid() && !color.hasAlpha();
}

ColorInputType::~ColorInputType()
{
    endColorChooser();
}

bool ColorInputType::isColorControl() const
{
    return true;
}

const AtomicString& ColorInputType::formControlType() const
{
    return InputTypeNames::color();
}

bool ColorInputType::supportsRequired() const
{
    return false;
}

String ColorInputType::fallbackValue() const
{
    return String("#000000");
}

String ColorInputType::sanitizeValue(const String& proposedValue) const
{
    if (!isValidColorString(proposedValue))
        return fallbackValue();

    return proposedValue.lower();
}

Color ColorInputType::valueAsColor() const
{
    return Color(element().value());
}

void ColorInputType::createShadowSubtree()
{
    ASSERT(element().shadowRoot());

    Document& document = element().document();
    RefPtr<HTMLDivElement> wrapperElement = HTMLDivElement::create(document);
    wrapperElement->setPseudo(AtomicString("-webkit-color-swatch-wrapper", AtomicString::ConstructFromLiteral));
    RefPtr<HTMLDivElement> colorSwatch = HTMLDivElement::create(document);
    colorSwatch->setPseudo(AtomicString("-webkit-color-swatch", AtomicString::ConstructFromLiteral));
    wrapperElement->appendChild(colorSwatch.release(), ASSERT_NO_EXCEPTION);
    element().userAgentShadowRoot()->appendChild(wrapperElement.release(), ASSERT_NO_EXCEPTION);
    
    updateColorSwatch();
}

void ColorInputType::setValue(const String& value, bool valueChanged, TextFieldEventBehavior eventBehavior)
{
    InputType::setValue(value, valueChanged, eventBehavior);

    if (!valueChanged)
        return;

    updateColorSwatch();
    if (m_chooser)
        m_chooser->setSelectedColor(valueAsColor());
}

void ColorInputType::handleDOMActivateEvent(Event* event)
{
    if (element().isDisabledOrReadOnly() || !element().renderer())
        return;

    if (!ScriptController::processingUserGesture())
        return;

    if (Chrome* chrome = this->chrome()) {
        if (!m_chooser)
            m_chooser = chrome->createColorChooser(this, valueAsColor());
        else
            m_chooser->reattachColorChooser(valueAsColor());
    }

    event->setDefaultHandled();
}

void ColorInputType::detach()
{
    endColorChooser();
}

bool ColorInputType::shouldRespectListAttribute()
{
    return InputType::themeSupportsDataListUI(this);
}

bool ColorInputType::typeMismatchFor(const String& value) const
{
    return !isValidColorString(value);
}

bool ColorInputType::shouldResetOnDocumentActivation()
{
    return true;
}

void ColorInputType::didChooseColor(const Color& color)
{
    if (element().isDisabledOrReadOnly() || color == valueAsColor())
        return;
    element().setValueFromRenderer(color.serialized());
    updateColorSwatch();
    element().dispatchFormControlChangeEvent();
}

void ColorInputType::didEndChooser()
{
    m_chooser = nullptr;
}

void ColorInputType::endColorChooser()
{
    if (m_chooser)
        m_chooser->endChooser();
}

void ColorInputType::updateColorSwatch()
{
    HTMLElement* colorSwatch = shadowColorSwatch();
    if (!colorSwatch)
        return;

    colorSwatch->setInlineStyleProperty(CSSPropertyBackgroundColor, element().value(), false);
}

HTMLElement* ColorInputType::shadowColorSwatch() const
{
    ShadowRoot* shadow = element().userAgentShadowRoot();
    return shadow ? downcast<HTMLElement>(shadow->firstChild()->firstChild()) : nullptr;
}

IntRect ColorInputType::elementRectRelativeToRootView() const
{
    if (!element().renderer())
        return IntRect();
    return element().document().view()->contentsToRootView(element().renderer()->absoluteBoundingBoxRect());
}

Color ColorInputType::currentColor()
{
    return valueAsColor();
}

bool ColorInputType::shouldShowSuggestions() const
{
#if ENABLE(DATALIST_ELEMENT)
    return element().fastHasAttribute(listAttr);
#else
    return false;
#endif
}

Vector<Color> ColorInputType::suggestions() const
{
    Vector<Color> suggestions;
#if ENABLE(DATALIST_ELEMENT)
    HTMLDataListElement* dataList = element().dataList();
    if (dataList) {
        Ref<HTMLCollection> options = dataList->options();
        for (unsigned i = 0; HTMLOptionElement* option = downcast<HTMLOptionElement>(options->item(i)); ++i) {
            if (!element().isValidValue(option->value()))
                continue;
            Color color(option->value());
            if (!color.isValid())
                continue;
            suggestions.append(color);
        }
    }
#endif
    return suggestions;
}

} // namespace WebCore

#endif // ENABLE(INPUT_TYPE_COLOR)