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

DEFINITIONS

1. create
2. formControlType
3. isFormDataAppendable
4. appendFormData
5. resultForDialogSubmit
6. supportsValidation
7. extractClickLocation
8. handleDOMActivateEvent
9. createRenderer
10. altAttributeChanged
11. srcAttributeChanged
12. startResourceLoading
13. shouldRespectAlignAttribute
14. canBeSuccessfulSubmitButton
15. isImageButton
16. isEnumeratable
17. shouldRespectHeightAndWidthAttributes
18. height
19. width
20. hasLegalLinkAttribute
21. subResourceAttributeName

/*
 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
 * Copyright (C) 2010 Google Inc. All rights reserved.
 * Copyright (C) 2012 Samsung Electronics. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#include "config.h"
#include "core/html/forms/ImageInputType.h"

#include "HTMLNames.h"
#include "InputTypeNames.h"
#include "core/events/MouseEvent.h"
#include "core/fetch/ImageResource.h"
#include "core/html/FormDataList.h"
#include "core/html/HTMLFormElement.h"
#include "core/html/HTMLImageLoader.h"
#include "core/html/HTMLInputElement.h"
#include "core/html/parser/HTMLParserIdioms.h"
#include "core/rendering/RenderImage.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/text/StringBuilder.h"

namespace WebCore {

using namespace HTMLNames;

inline ImageInputType::ImageInputType(HTMLInputElement& element)
    : BaseButtonInputType(element)
{
}

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

const AtomicString& ImageInputType::formControlType() const
{
    return InputTypeNames::image;
}

bool ImageInputType::isFormDataAppendable() const
{
    return true;
}

bool ImageInputType::appendFormData(FormDataList& encoding, bool) const
{
    if (!element().isActivatedSubmit())
        return false;
    const AtomicString& name = element().name();
    if (name.isEmpty()) {
        encoding.appendData("x", m_clickLocation.x());
        encoding.appendData("y", m_clickLocation.y());
        return true;
    }

    DEFINE_STATIC_LOCAL(String, dotXString, (".x"));
    DEFINE_STATIC_LOCAL(String, dotYString, (".y"));
    encoding.appendData(name + dotXString, m_clickLocation.x());
    encoding.appendData(name + dotYString, m_clickLocation.y());

    if (!element().value().isEmpty())
        encoding.appendData(name, element().value());
    return true;
}

String ImageInputType::resultForDialogSubmit() const
{
    StringBuilder result;
    result.appendNumber(m_clickLocation.x());
    result.append(",");
    result.appendNumber(m_clickLocation.y());
    return result.toString();
}

bool ImageInputType::supportsValidation() const
{
    return false;
}

static IntPoint extractClickLocation(Event* event)
{
    if (!event->underlyingEvent() || !event->underlyingEvent()->isMouseEvent())
        return IntPoint();
    MouseEvent* mouseEvent = toMouseEvent(event->underlyingEvent());
    if (mouseEvent->isSimulated())
        return IntPoint();
    return IntPoint(mouseEvent->offsetX(), mouseEvent->offsetY());
}

void ImageInputType::handleDOMActivateEvent(Event* event)
{
    RefPtr<HTMLInputElement> element(this->element());
    if (element->isDisabledFormControl() || !element->form())
        return;
    element->setActivatedSubmit(true);
    m_clickLocation = extractClickLocation(event);
    element->form()->prepareForSubmission(event); // Event handlers can run.
    element->setActivatedSubmit(false);
    event->setDefaultHandled();
}

RenderObject* ImageInputType::createRenderer(RenderStyle*) const
{
    RenderImage* image = new RenderImage(&element());
    image->setImageResource(RenderImageResource::create());
    return image;
}

void ImageInputType::altAttributeChanged()
{
    RenderImage* image = toRenderImage(element().renderer());
    if (!image)
        return;
    image->updateAltText();
}

void ImageInputType::srcAttributeChanged()
{
    if (!element().renderer())
        return;
    element().imageLoader()->updateFromElementIgnoringPreviousError();
}

void ImageInputType::startResourceLoading()
{
    BaseButtonInputType::startResourceLoading();

    HTMLImageLoader* imageLoader = element().imageLoader();
    imageLoader->updateFromElement();

    RenderImage* renderer = toRenderImage(element().renderer());
    if (!renderer)
        return;

    RenderImageResource* imageResource = renderer->imageResource();
    imageResource->setImageResource(imageLoader->image());

    // If we have no image at all because we have no src attribute, set
    // image height and width for the alt text instead.
    if (!imageLoader->image() && !imageResource->cachedImage())
        renderer->setImageSizeForAltText();
}

bool ImageInputType::shouldRespectAlignAttribute()
{
    return true;
}

bool ImageInputType::canBeSuccessfulSubmitButton()
{
    return true;
}

bool ImageInputType::isImageButton() const
{
    return true;
}

bool ImageInputType::isEnumeratable()
{
    return false;
}

bool ImageInputType::shouldRespectHeightAndWidthAttributes()
{
    return true;
}

unsigned ImageInputType::height() const
{
    RefPtr<HTMLInputElement> element(this->element());

    if (!element->renderer()) {
        // Check the attribute first for an explicit pixel value.
        unsigned height;
        if (parseHTMLNonNegativeInteger(element->fastGetAttribute(heightAttr), height))
            return height;

        // If the image is available, use its height.
        if (element->hasImageLoader()) {
            HTMLImageLoader* imageLoader = element->imageLoader();
            if (imageLoader->image())
                return imageLoader->image()->imageSizeForRenderer(element->renderer(), 1).height();
        }
    }

    element->document().updateLayout();

    RenderBox* box = element->renderBox();
    return box ? adjustForAbsoluteZoom(box->contentHeight(), box) : 0;
}

unsigned ImageInputType::width() const
{
    RefPtr<HTMLInputElement> element(this->element());

    if (!element->renderer()) {
        // Check the attribute first for an explicit pixel value.
        unsigned width;
        if (parseHTMLNonNegativeInteger(element->fastGetAttribute(widthAttr), width))
            return width;

        // If the image is available, use its width.
        if (element->hasImageLoader()) {
            HTMLImageLoader* imageLoader = element->imageLoader();
            if (imageLoader->image())
                return imageLoader->image()->imageSizeForRenderer(element->renderer(), 1).width();
        }
    }

    element->document().updateLayout();

    RenderBox* box = element->renderBox();
    return box ? adjustForAbsoluteZoom(box->contentWidth(), box) : 0;
}

bool ImageInputType::hasLegalLinkAttribute(const QualifiedName& name) const
{
    return name == srcAttr || BaseButtonInputType::hasLegalLinkAttribute(name);
}

const QualifiedName& ImageInputType::subResourceAttributeName() const
{
    return srcAttr;
}

} // namespace WebCore