root/Source/core/html/forms/ColorInputType.cpp

DEFINITIONS

1. isValidColorString
2. create
3. countUsage
4. isColorControl
5. formControlType
6. supportsRequired
7. fallbackValue
8. sanitizeValue
9. valueAsColor
10. createShadowSubtree
11. setValue
12. handleDOMActivateEvent
13. closePopupView
14. shouldRespectListAttribute
15. typeMismatchFor
16. didChooseColor
17. didEndChooser
18. endColorChooser
19. updateView
20. shadowColorSwatch
21. elementRectRelativeToRootView
22. currentColor
23. shouldShowSuggestions
24. suggestions

/*
 * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * 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,
 * 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"
#include "core/html/forms/ColorInputType.h"

#include "CSSPropertyNames.h"
#include "InputTypeNames.h"
#include "RuntimeEnabledFeatures.h"
#include "bindings/v8/ExceptionStatePlaceholder.h"
#include "bindings/v8/ScriptController.h"
#include "core/events/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/page/Chrome.h"
#include "core/rendering/RenderView.h"
#include "platform/UserGestureIndicator.h"
#include "platform/graphics/Color.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/text/WTFString.h"

namespace WebCore {

using namespace HTMLNames;

// Upper limit of number of datalist suggestions shown.
static const unsigned maxSuggestions = 1000;
// Upper limit for the length of the labels for datalist suggestions.
static const unsigned maxSuggestionLabelLength = 1000;

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;
    return color.setFromString(value) && !color.hasAlpha();
}

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

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

void ColorInputType::countUsage()
{
    countUsageIfVisible(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();
}

Color ColorInputType::valueAsColor() const
{
    Color color;
    bool success = color.setFromString(element().value());
    ASSERT_UNUSED(success, success);
    return color;
}

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

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

    element().updateView();
}

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

    if (!valueChanged)
        return;

    element().updateView();
    if (m_chooser)
        m_chooser->setSelectedColor(valueAsColor());
}

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

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

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

    event->setDefaultHandled();
}

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

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

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());
    element().updateView();
    element().dispatchFormControlChangeEvent();
}

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

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

void ColorInputType::updateView()
{
    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();
}

bool ColorInputType::shouldShowSuggestions() const
{
    return element().fastHasAttribute(listAttr);
}

Vector<ColorSuggestion> ColorInputType::suggestions() const
{
    Vector<ColorSuggestion> suggestions;
    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;
            Color color;
            if (!color.setFromString(option->value()))
                continue;
            ColorSuggestion suggestion(color, option->label().left(maxSuggestionLabelLength));
            suggestions.append(suggestion);
            if (suggestions.size() >= maxSuggestions)
                break;
        }
    }
    return suggestions;
}

} // namespace WebCore