Source/core/html/ColorInputType.cpp

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met:
 *
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "config.h"
#include "core/html/ColorInputType.h"

#include "CSSPropertyNames.h"
#include "RuntimeEnabledFeatures.h"
#include "bindings/v8/ExceptionStatePlaceholder.h"
#include "bindings/v8/ScriptController.h"
#include "core/dom/MouseEvent.h"
#include "core/dom/shadow/ShadowRoot.h"
#include "core/html/HTMLDataListElement.h"
#include "core/html/HTMLDivElement.h"
#include "core/html/HTMLInputElement.h"
#include "core/html/HTMLOptionElement.h"
#include "core/html/InputTypeNames.h"
#include "core/page/Chrome.h"
#include "core/platform/graphics/Color.h"
#include "core/rendering/RenderView.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/text/WTFString.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;
    StyleColor color(value);
    return color.isValid() && !color.hasAlpha();
}

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

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

void ColorInputType::countUsage()
{
    observeFeatureIfVisible(UseCounter::InputTypeColor);
}

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();
}

StyleColor ColorInputType::valueAsColor() const
{
    return StyleColor(element()->value());
}

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

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

    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().color());
}

void ColorInputType::handleDOMActivateEvent(Event* event)
{
    if (element()->isDisabledFormControl() || !element()->renderer())
        return;

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

    Chrome* chrome = this->chrome();
    if (chrome && !m_chooser)
        m_chooser = chrome->createColorChooser(this, valueAsColor().color());

    event->setDefaultHandled();
}

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

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

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

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

void ColorInputType::didEndChooser()
{
    m_chooser.clear();
}

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

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

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

HTMLElement* ColorInputType::shadowColorSwatch() const
{
    ShadowRoot* shadow = element()->userAgentShadowRoot();
    return shadow ? toHTMLElement(shadow->firstChild()->firstChild()) : 0;
}

IntRect ColorInputType::elementRectRelativeToRootView() const
{
    return element()->document()->view()->contentsToRootView(element()->pixelSnappedBoundingBox());
}

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

bool ColorInputType::shouldShowSuggestions() const
{
    if (RuntimeEnabledFeatures::dataListElementEnabled())
        return element()->fastHasAttribute(listAttr);

    return false;
}

Vector<Color> ColorInputType::suggestions() const
{
    Vector<Color> suggestions;
    if (RuntimeEnabledFeatures::dataListElementEnabled()) {
        HTMLDataListElement* dataList = element()->dataList();
        if (dataList) {
            RefPtr<HTMLCollection> options = dataList->options();
            for (unsigned i = 0; HTMLOptionElement* option = toHTMLOptionElement(options->item(i)); i++) {
                if (!element()->isValidValue(option->value()))
                    continue;
                StyleColor color(option->value());
                if (!color.isValid())
                    continue;
                suggestions.append(color.color());
            }
        }
    }
    return suggestions;
}

} // namespace WebCore