blob: 79c34258039d73b113ab4215889437503d6cc646 [file] [log] [blame]
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004-2016 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 "CSSPropertyNames.h"
#include "CSSValueKeywords.h"
#include "CachedImage.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "EditableImageReference.h"
#include "Editor.h"
#include "ElementIterator.h"
#include "EventNames.h"
#include "FrameView.h"
#include "HTMLAnchorElement.h"
#include "HTMLAttachmentElement.h"
#include "HTMLDocument.h"
#include "HTMLFormElement.h"
#include "HTMLImageLoader.h"
#include "HTMLParserIdioms.h"
#include "HTMLPictureElement.h"
#include "HTMLMapElement.h"
#include "HTMLSourceElement.h"
#include "HTMLSrcsetParser.h"
#include "Logging.h"
#include "MIMETypeRegistry.h"
#include "MediaList.h"
#include "MediaQueryEvaluator.h"
#include "MouseEvent.h"
#include "NodeTraversal.h"
#include "PlatformMouseEvent.h"
#include "RenderImage.h"
#include "RenderView.h"
#include "RuntimeEnabledFeatures.h"
#include "Settings.h"
#include "ShadowRoot.h"
#include "SizesAttributeParser.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/text/StringBuilder.h>
#if ENABLE(SERVICE_CONTROLS)
#include "ImageControlsRootElement.h"
#endif
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLImageElement);
using namespace HTMLNames;
HTMLImageElement::HTMLImageElement(const QualifiedName& tagName, Document& document, HTMLFormElement* form, bool createdByParser)
: HTMLElement(tagName, document)
, m_imageLoader(WTF::makeUnique<HTMLImageLoader>(*this))
, m_form(nullptr)
, m_formSetByParser(makeWeakPtr(form))
, m_compositeOperator(CompositeOperator::SourceOver)
, m_imageDevicePixelRatio(1.0f)
, m_experimentalImageMenuEnabled(false)
, m_createdByParser(createdByParser)
{
ASSERT(hasTagName(imgTag));
setHasCustomStyleResolveCallbacks();
}
Ref<HTMLImageElement> HTMLImageElement::create(Document& document)
{
return adoptRef(*new HTMLImageElement(imgTag, document));
}
Ref<HTMLImageElement> HTMLImageElement::create(const QualifiedName& tagName, Document& document, HTMLFormElement* form, bool createdByParser)
{
return adoptRef(*new HTMLImageElement(tagName, document, form, createdByParser));
}
HTMLImageElement::~HTMLImageElement()
{
document().removeDynamicMediaQueryDependentImage(*this);
if (m_form)
m_form->removeImgElement(this);
setPictureElement(nullptr);
}
Ref<HTMLImageElement> HTMLImageElement::createForJSConstructor(Document& document, Optional<unsigned> width, Optional<unsigned> height)
{
auto image = adoptRef(*new HTMLImageElement(imgTag, document));
if (width)
image->setWidth(width.value());
if (height)
image->setHeight(height.value());
return image;
}
bool HTMLImageElement::isPresentationAttribute(const QualifiedName& name) const
{
if (name == widthAttr || name == heightAttr || name == borderAttr || name == vspaceAttr || name == hspaceAttr || name == valignAttr)
return true;
return HTMLElement::isPresentationAttribute(name);
}
void HTMLImageElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
{
if (name == widthAttr)
addHTMLLengthToStyle(style, CSSPropertyWidth, value);
else if (name == heightAttr)
addHTMLLengthToStyle(style, CSSPropertyHeight, value);
else if (name == borderAttr)
applyBorderAttributeToStyle(value, style);
else if (name == vspaceAttr) {
addHTMLLengthToStyle(style, CSSPropertyMarginTop, value);
addHTMLLengthToStyle(style, CSSPropertyMarginBottom, value);
} else if (name == hspaceAttr) {
addHTMLLengthToStyle(style, CSSPropertyMarginLeft, value);
addHTMLLengthToStyle(style, CSSPropertyMarginRight, value);
} else if (name == alignAttr)
applyAlignmentAttributeToStyle(value, style);
else if (name == valignAttr)
addPropertyToPresentationAttributeStyle(style, CSSPropertyVerticalAlign, value);
else
HTMLElement::collectStyleForPresentationAttribute(name, value, style);
}
const AtomString& HTMLImageElement::imageSourceURL() const
{
return m_bestFitImageURL.isEmpty() ? attributeWithoutSynchronization(srcAttr) : m_bestFitImageURL;
}
void HTMLImageElement::setBestFitURLAndDPRFromImageCandidate(const ImageCandidate& candidate)
{
m_bestFitImageURL = candidate.string.toAtomString();
m_currentSrc = AtomString(document().completeURL(imageSourceURL()).string());
if (candidate.density >= 0)
m_imageDevicePixelRatio = 1 / candidate.density;
if (is<RenderImage>(renderer()))
downcast<RenderImage>(*renderer()).setImageDevicePixelRatio(m_imageDevicePixelRatio);
}
ImageCandidate HTMLImageElement::bestFitSourceFromPictureElement()
{
auto picture = makeRefPtr(pictureElement());
if (!picture)
return { };
ImageCandidate candidate;
for (RefPtr<Node> child = picture->firstChild(); child && child != this; child = child->nextSibling()) {
if (!is<HTMLSourceElement>(*child))
continue;
auto& source = downcast<HTMLSourceElement>(*child);
auto& srcset = source.attributeWithoutSynchronization(srcsetAttr);
if (srcset.isEmpty())
continue;
auto& typeAttribute = source.attributeWithoutSynchronization(typeAttr);
if (!typeAttribute.isNull()) {
String type = typeAttribute.string();
type.truncate(type.find(';'));
type = stripLeadingAndTrailingHTMLSpaces(type);
if (!type.isEmpty() && !MIMETypeRegistry::isSupportedImageVideoOrSVGMIMEType(type))
continue;
}
auto documentElement = makeRefPtr(document().documentElement());
MediaQueryEvaluator evaluator { document().printing() ? "print" : "screen", document(), documentElement ? documentElement->computedStyle() : nullptr };
auto* queries = source.parsedMediaAttribute(document());
LOG(MediaQueries, "HTMLImageElement %p bestFitSourceFromPictureElement evaluating media queries", this);
auto evaluation = !queries || evaluator.evaluate(*queries, &m_mediaQueryDynamicResults);
if (!evaluation)
continue;
SizesAttributeParser sizesParser(source.attributeWithoutSynchronization(sizesAttr).string(), document(), &m_mediaQueryDynamicResults);
auto sourceSize = sizesParser.length();
candidate = bestFitSourceForImageAttributes(document().deviceScaleFactor(), nullAtom(), srcset, sourceSize);
if (!candidate.isEmpty())
break;
}
return candidate;
}
void HTMLImageElement::evaluateDynamicMediaQueryDependencies()
{
auto documentElement = makeRefPtr(document().documentElement());
MediaQueryEvaluator evaluator { document().printing() ? "print" : "screen", document(), documentElement ? documentElement->computedStyle() : nullptr };
if (!evaluator.evaluateForChanges(m_mediaQueryDynamicResults))
return;
selectImageSource();
}
void HTMLImageElement::selectImageSource()
{
m_mediaQueryDynamicResults = { };
document().removeDynamicMediaQueryDependentImage(*this);
// First look for the best fit source from our <picture> parent if we have one.
ImageCandidate candidate = bestFitSourceFromPictureElement();
if (candidate.isEmpty()) {
// If we don't have a <picture> or didn't find a source, then we use our own attributes.
SizesAttributeParser sizesParser(attributeWithoutSynchronization(sizesAttr).string(), document(), &m_mediaQueryDynamicResults);
auto sourceSize = sizesParser.length();
candidate = bestFitSourceForImageAttributes(document().deviceScaleFactor(), attributeWithoutSynchronization(srcAttr), attributeWithoutSynchronization(srcsetAttr), sourceSize);
}
setBestFitURLAndDPRFromImageCandidate(candidate);
m_imageLoader->updateFromElementIgnoringPreviousError();
if (!m_mediaQueryDynamicResults.isEmpty())
document().addDynamicMediaQueryDependentImage(*this);
}
void HTMLImageElement::parseAttribute(const QualifiedName& name, const AtomString& value)
{
if (name == altAttr) {
if (is<RenderImage>(renderer()))
downcast<RenderImage>(*renderer()).updateAltText();
} else if (name == srcAttr || name == srcsetAttr || name == sizesAttr)
selectImageSource();
else if (name == usemapAttr) {
if (isInTreeScope() && !m_parsedUsemap.isNull())
treeScope().removeImageElementByUsemap(*m_parsedUsemap.impl(), *this);
m_parsedUsemap = parseHTMLHashNameReference(value);
if (isInTreeScope() && !m_parsedUsemap.isNull())
treeScope().addImageElementByUsemap(*m_parsedUsemap.impl(), *this);
} else if (name == compositeAttr) {
// FIXME: images don't support blend modes in their compositing attribute.
BlendMode blendOp = BlendMode::Normal;
if (!parseCompositeAndBlendOperator(value, m_compositeOperator, blendOp))
m_compositeOperator = CompositeOperator::SourceOver;
#if ENABLE(SERVICE_CONTROLS)
} else if (name == webkitimagemenuAttr) {
m_experimentalImageMenuEnabled = !value.isNull();
updateImageControls();
#endif
} else if (name == x_apple_editable_imageAttr)
updateEditableImage();
else {
if (name == nameAttr) {
bool willHaveName = !value.isNull();
if (m_hadNameBeforeAttributeChanged != willHaveName && isConnected() && !isInShadowTree() && is<HTMLDocument>(document())) {
HTMLDocument& document = downcast<HTMLDocument>(this->document());
const AtomString& id = getIdAttribute();
if (!id.isEmpty() && id != getNameAttribute()) {
if (willHaveName)
document.addDocumentNamedItem(*id.impl(), *this);
else
document.removeDocumentNamedItem(*id.impl(), *this);
}
}
m_hadNameBeforeAttributeChanged = willHaveName;
}
HTMLElement::parseAttribute(name, value);
}
}
const AtomString& 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
const AtomString& alt = attributeWithoutSynchronization(altAttr);
if (!alt.isNull())
return alt;
// fall back to title attribute
return attributeWithoutSynchronization(titleAttr);
}
RenderPtr<RenderElement> HTMLImageElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
if (style.hasContent())
return RenderElement::createFor(*this, WTFMove(style));
return createRenderer<RenderImage>(*this, WTFMove(style), nullptr, m_imageDevicePixelRatio);
}
bool HTMLImageElement::canStartSelection() const
{
if (shadowRoot())
return HTMLElement::canStartSelection();
return false;
}
bool HTMLImageElement::supportsFocus() const
{
if (hasEditableImageAttribute())
return true;
return HTMLElement::supportsFocus();
}
bool HTMLImageElement::isFocusable() const
{
if (hasEditableImageAttribute())
return true;
return HTMLElement::isFocusable();
}
bool HTMLImageElement::isInteractiveContent() const
{
return hasAttributeWithoutSynchronization(usemapAttr);
}
void HTMLImageElement::didAttachRenderers()
{
if (!is<RenderImage>(renderer()))
return;
if (m_imageLoader->hasPendingBeforeLoadEvent())
return;
#if ENABLE(SERVICE_CONTROLS)
updateImageControls();
#endif
auto& renderImage = downcast<RenderImage>(*renderer());
RenderImageResource& renderImageResource = renderImage.imageResource();
if (renderImageResource.cachedImage())
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();
}
Node::InsertedIntoAncestorResult HTMLImageElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
{
if (m_formSetByParser) {
m_form = WTFMove(m_formSetByParser);
m_form->registerImgElement(this);
}
if (m_form && rootElement() != m_form->rootElement()) {
m_form->removeImgElement(this);
m_form = nullptr;
}
if (!m_form) {
if (auto* newForm = HTMLFormElement::findClosestFormAncestor(*this)) {
m_form = makeWeakPtr(newForm);
newForm->registerImgElement(this);
}
}
// Insert needs to complete first, before we start updating the loader. Loader dispatches events which could result
// in callbacks back to this node.
Node::InsertedIntoAncestorResult insertNotificationRequest = HTMLElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
if (insertionType.connectedToDocument && hasEditableImageAttribute())
insertNotificationRequest = InsertedIntoAncestorResult::NeedsPostInsertionCallback;
if (insertionType.treeScopeChanged && !m_parsedUsemap.isNull())
treeScope().addImageElementByUsemap(*m_parsedUsemap.impl(), *this);
if (is<HTMLPictureElement>(parentNode())) {
setPictureElement(&downcast<HTMLPictureElement>(*parentNode()));
selectImageSource();
}
// If we have been inserted from a renderer-less document,
// our loader may have not fetched the image, so do it now.
if (insertionType.connectedToDocument && !m_imageLoader->image())
m_imageLoader->updateFromElement();
return insertNotificationRequest;
}
void HTMLImageElement::didFinishInsertingNode()
{
if (hasEditableImageAttribute())
updateEditableImage();
}
void HTMLImageElement::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
{
if (m_form)
m_form->removeImgElement(this);
if (removalType.treeScopeChanged && !m_parsedUsemap.isNull())
oldParentOfRemovedTree.treeScope().removeImageElementByUsemap(*m_parsedUsemap.impl(), *this);
if (is<HTMLPictureElement>(parentNode()))
setPictureElement(nullptr);
if (removalType.disconnectedFromDocument)
updateEditableImage();
m_form = nullptr;
HTMLElement::removedFromAncestor(removalType, oldParentOfRemovedTree);
}
bool HTMLImageElement::hasEditableImageAttribute() const
{
if (!document().settings().editableImagesEnabled())
return false;
return hasAttributeWithoutSynchronization(x_apple_editable_imageAttr);
}
GraphicsLayer::EmbeddedViewID HTMLImageElement::editableImageViewID() const
{
if (!m_editableImage)
return 0;
return m_editableImage->embeddedViewID();
}
void HTMLImageElement::updateEditableImage()
{
if (!document().settings().editableImagesEnabled())
return;
auto* page = document().page();
if (!page)
return;
bool hasEditableAttribute = hasEditableImageAttribute();
bool isCurrentlyEditable = !!m_editableImage;
bool shouldBeEditable = isConnected() && hasEditableAttribute;
#if ENABLE(ATTACHMENT_ELEMENT)
// Create the inner attachment for editable images, or non-editable
// images that were cloned from editable image sources.
if (!attachmentElement() && (shouldBeEditable || !m_pendingClonedAttachmentID.isEmpty())) {
auto attachment = HTMLAttachmentElement::create(HTMLNames::attachmentTag, document());
if (!m_pendingClonedAttachmentID.isEmpty())
attachment->setUniqueIdentifier(WTFMove(m_pendingClonedAttachmentID));
else
attachment->ensureUniqueIdentifier();
setAttachmentElement(WTFMove(attachment));
}
#endif
if (shouldBeEditable == isCurrentlyEditable)
return;
if (!hasEditableAttribute) {
m_editableImage = nullptr;
return;
}
if (!m_editableImage)
m_editableImage = EditableImageReference::create(document());
#if ENABLE(ATTACHMENT_ELEMENT)
m_editableImage->associateWithAttachment(attachmentElement()->uniqueIdentifier());
#endif
}
HTMLPictureElement* HTMLImageElement::pictureElement() const
{
return m_pictureElement.get();
}
void HTMLImageElement::setPictureElement(HTMLPictureElement* pictureElement)
{
m_pictureElement = makeWeakPtr(pictureElement);
}
unsigned HTMLImageElement::width(bool ignorePendingStylesheets)
{
if (!renderer()) {
// check the attribute first for an explicit pixel value
auto optionalWidth = parseHTMLNonNegativeInteger(attributeWithoutSynchronization(widthAttr));
if (optionalWidth)
return optionalWidth.value();
// if the image is available, use its width
if (m_imageLoader->image())
return m_imageLoader->image()->imageSizeForRenderer(renderer(), 1.0f).width().toUnsigned();
}
if (ignorePendingStylesheets)
document().updateLayoutIgnorePendingStylesheets();
else
document().updateLayout();
RenderBox* box = renderBox();
if (!box)
return 0;
LayoutRect contentRect = box->contentBoxRect();
return adjustForAbsoluteZoom(snappedIntRect(contentRect).width(), *box);
}
unsigned HTMLImageElement::height(bool ignorePendingStylesheets)
{
if (!renderer()) {
// check the attribute first for an explicit pixel value
auto optionalHeight = parseHTMLNonNegativeInteger(attributeWithoutSynchronization(heightAttr));
if (optionalHeight)
return optionalHeight.value();
// if the image is available, use its height
if (m_imageLoader->image())
return m_imageLoader->image()->imageSizeForRenderer(renderer(), 1.0f).height().toUnsigned();
}
if (ignorePendingStylesheets)
document().updateLayoutIgnorePendingStylesheets();
else
document().updateLayout();
RenderBox* box = renderBox();
if (!box)
return 0;
LayoutRect contentRect = box->contentBoxRect();
return adjustForAbsoluteZoom(snappedIntRect(contentRect).height(), *box);
}
int HTMLImageElement::naturalWidth() const
{
if (!m_imageLoader->image())
return 0;
return m_imageLoader->image()->imageSizeForRenderer(renderer(), 1.0f).width();
}
int HTMLImageElement::naturalHeight() const
{
if (!m_imageLoader->image())
return 0;
return m_imageLoader->image()->imageSizeForRenderer(renderer(), 1.0f).height();
}
bool HTMLImageElement::isURLAttribute(const Attribute& attribute) const
{
return attribute.name() == srcAttr
|| attribute.name() == lowsrcAttr
|| attribute.name() == longdescAttr
|| (attribute.name() == usemapAttr && attribute.value().string()[0] != '#')
|| HTMLElement::isURLAttribute(attribute);
}
bool HTMLImageElement::attributeContainsURL(const Attribute& attribute) const
{
return attribute.name() == srcsetAttr
|| HTMLElement::attributeContainsURL(attribute);
}
String HTMLImageElement::completeURLsInAttributeValue(const URL& base, const Attribute& attribute) const
{
if (attribute.name() == srcsetAttr) {
Vector<ImageCandidate> imageCandidates = parseImageCandidatesFromSrcsetAttribute(StringView(attribute.value()));
StringBuilder result;
for (const auto& candidate : imageCandidates) {
if (&candidate != &imageCandidates[0])
result.appendLiteral(", ");
result.append(URL(base, candidate.string.toString()).string());
if (candidate.density != UninitializedDescriptor) {
result.append(' ');
result.appendFixedPrecisionNumber(candidate.density);
result.append('x');
}
if (candidate.resourceWidth != UninitializedDescriptor) {
result.append(' ');
result.appendNumber(candidate.resourceWidth);
result.append('w');
}
}
return result.toString();
}
return HTMLElement::completeURLsInAttributeValue(base, attribute);
}
bool HTMLImageElement::matchesUsemap(const AtomStringImpl& name) const
{
return m_parsedUsemap.impl() == &name;
}
HTMLMapElement* HTMLImageElement::associatedMapElement() const
{
return treeScope().getImageMap(m_parsedUsemap);
}
const AtomString& HTMLImageElement::alt() const
{
return attributeWithoutSynchronization(altAttr);
}
bool HTMLImageElement::draggable() const
{
// Image elements are draggable by default.
return !equalLettersIgnoringASCIICase(attributeWithoutSynchronization(draggableAttr), "false");
}
void HTMLImageElement::setHeight(unsigned value)
{
setUnsignedIntegralAttribute(heightAttr, value);
}
URL HTMLImageElement::src() const
{
return document().completeURL(attributeWithoutSynchronization(srcAttr));
}
void HTMLImageElement::setSrc(const String& value)
{
setAttributeWithoutSynchronization(srcAttr, value);
}
void HTMLImageElement::setWidth(unsigned value)
{
setUnsignedIntegralAttribute(widthAttr, value);
}
int HTMLImageElement::x() const
{
document().updateLayoutIgnorePendingStylesheets();
auto renderer = this->renderer();
if (!renderer)
return 0;
// FIXME: This doesn't work correctly with transforms.
return renderer->localToAbsolute().x();
}
int HTMLImageElement::y() const
{
document().updateLayoutIgnorePendingStylesheets();
auto renderer = this->renderer();
if (!renderer)
return 0;
// FIXME: This doesn't work correctly with transforms.
return renderer->localToAbsolute().y();
}
bool HTMLImageElement::complete() const
{
return m_imageLoader->imageComplete();
}
DecodingMode HTMLImageElement::decodingMode() const
{
const AtomString& decodingMode = attributeWithoutSynchronization(decodingAttr);
if (equalLettersIgnoringASCIICase(decodingMode, "sync"))
return DecodingMode::Synchronous;
if (equalLettersIgnoringASCIICase(decodingMode, "async"))
return DecodingMode::Asynchronous;
return DecodingMode::Auto;
}
void HTMLImageElement::decode(Ref<DeferredPromise>&& promise)
{
return m_imageLoader->decode(WTFMove(promise));
}
void HTMLImageElement::addSubresourceAttributeURLs(ListHashSet<URL>& urls) const
{
HTMLElement::addSubresourceAttributeURLs(urls);
addSubresourceURL(urls, document().completeURL(imageSourceURL()));
// FIXME: What about when the usemap attribute begins with "#"?
addSubresourceURL(urls, document().completeURL(attributeWithoutSynchronization(usemapAttr)));
}
void HTMLImageElement::didMoveToNewDocument(Document& oldDocument, Document& newDocument)
{
oldDocument.removeDynamicMediaQueryDependentImage(*this);
m_imageLoader->elementDidMoveToNewDocument();
HTMLElement::didMoveToNewDocument(oldDocument, newDocument);
}
bool HTMLImageElement::isServerMap() const
{
if (!hasAttributeWithoutSynchronization(ismapAttr))
return false;
const AtomString& usemap = attributeWithoutSynchronization(usemapAttr);
// If the usemap attribute starts with '#', it refers to a map element in the document.
if (usemap.string()[0] == '#')
return false;
return document().completeURL(stripLeadingAndTrailingHTMLSpaces(usemap)).isEmpty();
}
void HTMLImageElement::setCrossOrigin(const AtomString& value)
{
setAttributeWithoutSynchronization(crossoriginAttr, value);
}
String HTMLImageElement::crossOrigin() const
{
return parseCORSSettingsAttribute(attributeWithoutSynchronization(crossoriginAttr));
}
#if ENABLE(ATTACHMENT_ELEMENT)
void HTMLImageElement::setAttachmentElement(Ref<HTMLAttachmentElement>&& attachment)
{
if (auto existingAttachment = attachmentElement())
existingAttachment->remove();
attachment->setInlineStyleProperty(CSSPropertyDisplay, CSSValueNone, true);
ensureUserAgentShadowRoot().appendChild(WTFMove(attachment));
}
RefPtr<HTMLAttachmentElement> HTMLImageElement::attachmentElement() const
{
if (auto shadowRoot = userAgentShadowRoot())
return childrenOfType<HTMLAttachmentElement>(*shadowRoot).first();
return nullptr;
}
const String& HTMLImageElement::attachmentIdentifier() const
{
if (!m_pendingClonedAttachmentID.isEmpty())
return m_pendingClonedAttachmentID;
if (auto attachment = attachmentElement())
return attachment->uniqueIdentifier();
return nullAtom();
}
#endif // ENABLE(ATTACHMENT_ELEMENT)
#if ENABLE(SERVICE_CONTROLS)
void HTMLImageElement::updateImageControls()
{
// If this image element is inside a shadow tree then it is part of an image control.
if (isInShadowTree())
return;
if (!document().settings().imageControlsEnabled())
return;
bool hasControls = hasImageControls();
if (!m_experimentalImageMenuEnabled && hasControls)
destroyImageControls();
else if (m_experimentalImageMenuEnabled && !hasControls)
tryCreateImageControls();
}
void HTMLImageElement::tryCreateImageControls()
{
ASSERT(m_experimentalImageMenuEnabled);
ASSERT(!hasImageControls());
auto imageControls = ImageControlsRootElement::tryCreate(document());
if (!imageControls)
return;
ensureUserAgentShadowRoot().appendChild(*imageControls);
auto* renderObject = renderer();
if (!renderObject)
return;
downcast<RenderImage>(*renderObject).setHasShadowControls(true);
}
void HTMLImageElement::destroyImageControls()
{
auto shadowRoot = userAgentShadowRoot();
if (!shadowRoot)
return;
if (RefPtr<Node> node = shadowRoot->firstChild()) {
ASSERT_WITH_SECURITY_IMPLICATION(node->isImageControlsRootElement());
shadowRoot->removeChild(*node);
}
auto* renderObject = renderer();
if (!renderObject)
return;
downcast<RenderImage>(*renderObject).setHasShadowControls(false);
}
bool HTMLImageElement::hasImageControls() const
{
if (auto shadowRoot = userAgentShadowRoot()) {
RefPtr<Node> node = shadowRoot->firstChild();
ASSERT_WITH_SECURITY_IMPLICATION(!node || node->isImageControlsRootElement());
return node;
}
return false;
}
bool HTMLImageElement::childShouldCreateRenderer(const Node& child) const
{
return hasShadowRootParent(child) && HTMLElement::childShouldCreateRenderer(child);
}
#endif // ENABLE(SERVICE_CONTROLS)
#if PLATFORM(IOS_FAMILY)
// FIXME: We should find a better place for the touch callout logic. See rdar://problem/48937767.
bool HTMLImageElement::willRespondToMouseClickEvents()
{
auto renderer = this->renderer();
if (!renderer || renderer->style().touchCalloutEnabled())
return true;
return HTMLElement::willRespondToMouseClickEvents();
}
#endif
#if USE(SYSTEM_PREVIEW)
bool HTMLImageElement::isSystemPreviewImage() const
{
if (!RuntimeEnabledFeatures::sharedFeatures().systemPreviewEnabled())
return false;
const auto* parent = parentElement();
if (is<HTMLAnchorElement>(parent))
return downcast<HTMLAnchorElement>(parent)->isSystemPreviewLink();
if (is<HTMLPictureElement>(parent))
return downcast<HTMLPictureElement>(parent)->isSystemPreviewImage();
return false;
}
#endif
void HTMLImageElement::copyNonAttributePropertiesFromElement(const Element& source)
{
auto& sourceImage = static_cast<const HTMLImageElement&>(source);
#if ENABLE(ATTACHMENT_ELEMENT)
m_pendingClonedAttachmentID = !sourceImage.m_pendingClonedAttachmentID.isEmpty() ? sourceImage.m_pendingClonedAttachmentID : sourceImage.attachmentIdentifier();
#endif
m_editableImage = sourceImage.m_editableImage;
Element::copyNonAttributePropertiesFromElement(source);
}
void HTMLImageElement::defaultEventHandler(Event& event)
{
if (hasEditableImageAttribute() && event.type() == eventNames().mousedownEvent && is<MouseEvent>(event) && downcast<MouseEvent>(event).button() == LeftButton) {
focus();
event.setDefaultHandled();
return;
}
HTMLElement::defaultEventHandler(event);
}
CachedImage* HTMLImageElement::cachedImage() const
{
return m_imageLoader->image();
}
void HTMLImageElement::setLoadManually(bool loadManually)
{
m_imageLoader->setLoadManually(loadManually);
}
bool HTMLImageElement::hasPendingActivity() const
{
return m_imageLoader->hasPendingActivity();
}
size_t HTMLImageElement::pendingDecodePromisesCountForTesting() const
{
return m_imageLoader->pendingDecodePromisesCountForTesting();
}
}