/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
* Copyright (C) 2010 Google Inc. 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 "HTMLImageElement.h"
#include "Attribute.h"
#include "CSSPropertyNames.h"
#include "CSSValueKeywords.h"
#include "EventNames.h"
#include "FrameView.h"
#include "HTMLDocument.h"
#include "HTMLFormElement.h"
#include "HTMLNames.h"
#include "HTMLParserIdioms.h"
#include "RenderImage.h"
#include "ScriptEventListener.h"
using namespace std;
namespace WebCore {
using namespace HTMLNames;
HTMLImageElement::HTMLImageElement(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
: HTMLElement(tagName, document)
, m_imageLoader(this)
, ismap(false)
, m_form(form)
, m_compositeOperator(CompositeSourceOver)
{
ASSERT(hasTagName(imgTag));
if (form)
form->registerImgElement(this);
}
PassRefPtr<HTMLImageElement> HTMLImageElement::create(Document* document)
{
return adoptRef(new HTMLImageElement(imgTag, document));
}
PassRefPtr<HTMLImageElement> HTMLImageElement::create(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
{
return adoptRef(new HTMLImageElement(tagName, document, form));
}
HTMLImageElement::~HTMLImageElement()
{
if (m_form)
m_form->removeImgElement(this);
}
PassRefPtr<HTMLImageElement> HTMLImageElement::createForJSConstructor(Document* document, const int* optionalWidth, const int* optionalHeight)
{
RefPtr<HTMLImageElement> image = adoptRef(new HTMLImageElement(imgTag, document));
if (optionalWidth)
image->setWidth(*optionalWidth);
if (optionalHeight > 0)
image->setHeight(*optionalHeight);
return image.release();
}
bool HTMLImageElement::mapToEntry(const QualifiedName& attrName, MappedAttributeEntry& result) const
{
if (attrName == widthAttr ||
attrName == heightAttr ||
attrName == vspaceAttr ||
attrName == hspaceAttr ||
attrName == valignAttr) {
result = eUniversal;
return false;
}
if (attrName == borderAttr || attrName == alignAttr) {
result = eReplaced; // Shared with embed and iframe elements.
return false;
}
return HTMLElement::mapToEntry(attrName, result);
}
void HTMLImageElement::parseMappedAttribute(Attribute* attr)
{
const QualifiedName& attrName = attr->name();
if (attrName == altAttr) {
if (renderer() && renderer()->isImage())
toRenderImage(renderer())->updateAltText();
} else if (attrName == srcAttr)
m_imageLoader.updateFromElementIgnoringPreviousError();
else if (attrName == widthAttr)
addCSSLength(attr, CSSPropertyWidth, attr->value());
else if (attrName == heightAttr)
addCSSLength(attr, CSSPropertyHeight, attr->value());
else if (attrName == borderAttr) {
// border="noborder" -> border="0"
addCSSLength(attr, CSSPropertyBorderWidth, attr->value().toInt() ? attr->value() : "0");
addCSSProperty(attr, CSSPropertyBorderTopStyle, CSSValueSolid);
addCSSProperty(attr, CSSPropertyBorderRightStyle, CSSValueSolid);
addCSSProperty(attr, CSSPropertyBorderBottomStyle, CSSValueSolid);
addCSSProperty(attr, CSSPropertyBorderLeftStyle, CSSValueSolid);
} else if (attrName == vspaceAttr) {
addCSSLength(attr, CSSPropertyMarginTop, attr->value());
addCSSLength(attr, CSSPropertyMarginBottom, attr->value());
} else if (attrName == hspaceAttr) {
addCSSLength(attr, CSSPropertyMarginLeft, attr->value());
addCSSLength(attr, CSSPropertyMarginRight, attr->value());
} else if (attrName == alignAttr)
addHTMLAlignment(attr);
else if (attrName == valignAttr)
addCSSProperty(attr, CSSPropertyVerticalAlign, attr->value());
else if (attrName == usemapAttr) {
if (attr->value().string()[0] == '#')
usemap = attr->value();
else
usemap = document()->completeURL(stripLeadingAndTrailingHTMLSpaces(attr->value())).string();
setIsLink(!attr->isNull());
} else if (attrName == ismapAttr)
ismap = true;
else if (attrName == onabortAttr)
setAttributeEventListener(eventNames().abortEvent, createAttributeEventListener(this, attr));
else if (attrName == onloadAttr)
setAttributeEventListener(eventNames().loadEvent, createAttributeEventListener(this, attr));
else if (attrName == onbeforeloadAttr)
setAttributeEventListener(eventNames().beforeloadEvent, createAttributeEventListener(this, attr));
else if (attrName == compositeAttr) {
if (!parseCompositeOperator(attr->value(), m_compositeOperator))
m_compositeOperator = CompositeSourceOver;
} else if (attrName == nameAttr) {
const AtomicString& newName = attr->value();
if (inDocument() && document()->isHTMLDocument()) {
HTMLDocument* document = static_cast<HTMLDocument*>(this->document());
document->removeNamedItem(m_name);
document->addNamedItem(newName);
}
m_name = newName;
} else if (isIdAttributeName(attr->name())) {
const AtomicString& newId = attr->value();
if (inDocument() && document()->isHTMLDocument()) {
HTMLDocument* document = static_cast<HTMLDocument*>(this->document());
document->removeExtraNamedItem(m_id);
document->addExtraNamedItem(newId);
}
m_id = newId;
// also call superclass
HTMLElement::parseMappedAttribute(attr);
} else
HTMLElement::parseMappedAttribute(attr);
}
String HTMLImageElement::altText() const
{
// lets figure out the alt text.. magic stuff
// http://www.w3.org/TR/1998/REC-html40-19980424/appendix/notes.html#altgen
// also heavily discussed by Hixie on bugzilla
String alt = getAttribute(altAttr);
// fall back to title attribute
if (alt.isNull())
alt = getAttribute(titleAttr);
return alt;
}
RenderObject* HTMLImageElement::createRenderer(RenderArena* arena, RenderStyle* style)
{
if (style->contentData())
return RenderObject::createObject(this, style);
RenderImage* image = new (arena) RenderImage(this);
image->setImageResource(RenderImageResource::create());
return image;
}
void HTMLImageElement::attach()
{
HTMLElement::attach();
if (renderer() && renderer()->isImage() && m_imageLoader.haveFiredBeforeLoadEvent()) {
RenderImage* renderImage = toRenderImage(renderer());
RenderImageResource* renderImageResource = renderImage->imageResource();
if (renderImageResource->hasImage())
return;
renderImageResource->setCachedImage(m_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 (!m_imageLoader.image() && !renderImageResource->cachedImage())
renderImage->setImageSizeForAltText();
}
}
void HTMLImageElement::insertedIntoDocument()
{
if (document()->isHTMLDocument()) {
HTMLDocument* document = static_cast<HTMLDocument*>(this->document());
document->addNamedItem(m_name);
document->addExtraNamedItem(m_id);
}
// If we have been inserted from a renderer-less document,
// our loader may have not fetched the image, so do it now.
if (!m_imageLoader.image())
m_imageLoader.updateFromElement();
HTMLElement::insertedIntoDocument();
}
void HTMLImageElement::removedFromDocument()
{
if (document()->isHTMLDocument()) {
HTMLDocument* document = static_cast<HTMLDocument*>(this->document());
document->removeNamedItem(m_name);
document->removeExtraNamedItem(m_id);
}
HTMLElement::removedFromDocument();
}
void HTMLImageElement::insertedIntoTree(bool deep)
{
if (!m_form) {
// m_form can be non-null if it was set in constructor.
for (ContainerNode* ancestor = parentNode(); ancestor; ancestor = ancestor->parentNode()) {
if (ancestor->hasTagName(formTag)) {
m_form = static_cast<HTMLFormElement*>(ancestor);
m_form->registerImgElement(this);
break;
}
}
}
HTMLElement::insertedIntoTree(deep);
}
void HTMLImageElement::removedFromTree(bool deep)
{
if (m_form)
m_form->removeImgElement(this);
m_form = 0;
HTMLElement::removedFromTree(deep);
}
int HTMLImageElement::width(bool ignorePendingStylesheets) const
{
if (!renderer()) {
// check the attribute first for an explicit pixel value
bool ok;
int width = getAttribute(widthAttr).toInt(&ok);
if (ok)
return width;
// if the image is available, use its width
if (m_imageLoader.image())
return m_imageLoader.image()->imageSize(1.0f).width();
}
if (ignorePendingStylesheets)
document()->updateLayoutIgnorePendingStylesheets();
else
document()->updateLayout();
RenderBox* box = renderBox();
return box ? adjustForAbsoluteZoom(box->contentWidth(), box) : 0;
}
int HTMLImageElement::height(bool ignorePendingStylesheets) const
{
if (!renderer()) {
// check the attribute first for an explicit pixel value
bool ok;
int height = getAttribute(heightAttr).toInt(&ok);
if (ok)
return height;
// if the image is available, use its height
if (m_imageLoader.image())
return m_imageLoader.image()->imageSize(1.0f).height();
}
if (ignorePendingStylesheets)
document()->updateLayoutIgnorePendingStylesheets();
else
document()->updateLayout();
RenderBox* box = renderBox();
return box ? adjustForAbsoluteZoom(box->contentHeight(), box) : 0;
}
int HTMLImageElement::naturalWidth() const
{
if (!m_imageLoader.image())
return 0;
return m_imageLoader.image()->imageSize(1.0f).width();
}
int HTMLImageElement::naturalHeight() const
{
if (!m_imageLoader.image())
return 0;
return m_imageLoader.image()->imageSize(1.0f).height();
}
bool HTMLImageElement::isURLAttribute(Attribute* attr) const
{
return attr->name() == srcAttr
|| attr->name() == lowsrcAttr
|| attr->name() == longdescAttr
|| (attr->name() == usemapAttr && attr->value().string()[0] != '#');
}
const AtomicString& HTMLImageElement::alt() const
{
return getAttribute(altAttr);
}
bool HTMLImageElement::draggable() const
{
// Image elements are draggable by default.
return !equalIgnoringCase(getAttribute(draggableAttr), "false");
}
void HTMLImageElement::setHeight(int value)
{
setAttribute(heightAttr, String::number(value));
}
KURL HTMLImageElement::src() const
{
return document()->completeURL(getAttribute(srcAttr));
}
void HTMLImageElement::setSrc(const String& value)
{
setAttribute(srcAttr, value);
}
void HTMLImageElement::setWidth(int value)
{
setAttribute(widthAttr, String::number(value));
}
int HTMLImageElement::x() const
{
RenderObject* r = renderer();
if (!r)
return 0;
// FIXME: This doesn't work correctly with transforms.
FloatPoint absPos = r->localToAbsolute();
return absPos.x();
}
int HTMLImageElement::y() const
{
RenderObject* r = renderer();
if (!r)
return 0;
// FIXME: This doesn't work correctly with transforms.
FloatPoint absPos = r->localToAbsolute();
return absPos.y();
}
bool HTMLImageElement::complete() const
{
return m_imageLoader.imageComplete();
}
void HTMLImageElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
{
HTMLElement::addSubresourceAttributeURLs(urls);
addSubresourceURL(urls, src());
// FIXME: What about when the usemap attribute begins with "#"?
addSubresourceURL(urls, document()->completeURL(getAttribute(usemapAttr)));
}
void HTMLImageElement::willMoveToNewOwnerDocument()
{
m_imageLoader.elementWillMoveToNewOwnerDocument();
HTMLElement::willMoveToNewOwnerDocument();
}
}