HTMLPictureElement.cpp [plain text]
#include "config.h"
#include "HTMLPictureElement.h"
#include "ElementChildIterator.h"
#include "HTMLAnchorElement.h"
#include "HTMLImageElement.h"
#include "Logging.h"
#include "RuntimeEnabledFeatures.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLPictureElement);
HTMLPictureElement::HTMLPictureElement(const QualifiedName& tagName, Document& document)
: HTMLElement(tagName, document)
{
}
HTMLPictureElement::~HTMLPictureElement()
{
document().removeViewportDependentPicture(*this);
document().removeAppearanceDependentPicture(*this);
}
void HTMLPictureElement::didMoveToNewDocument(Document& oldDocument, Document& newDocument)
{
oldDocument.removeViewportDependentPicture(*this);
oldDocument.removeAppearanceDependentPicture(*this);
HTMLElement::didMoveToNewDocument(oldDocument, newDocument);
sourcesChanged();
}
Ref<HTMLPictureElement> HTMLPictureElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new HTMLPictureElement(tagName, document));
}
void HTMLPictureElement::sourcesChanged()
{
for (auto& element : childrenOfType<HTMLImageElement>(*this))
element.selectImageSource();
}
bool HTMLPictureElement::viewportChangeAffectedPicture() const
{
auto documentElement = makeRefPtr(document().documentElement());
MediaQueryEvaluator evaluator { document().printing() ? "print" : "screen", document(), documentElement ? documentElement->computedStyle() : nullptr };
for (auto& result : m_viewportDependentMediaQueryResults) {
LOG(MediaQueries, "HTMLPictureElement %p viewportChangeAffectedPicture evaluating media queries", this);
if (evaluator.evaluate(result.expression) != result.result)
return true;
}
return false;
}
bool HTMLPictureElement::appearanceChangeAffectedPicture() const
{
auto documentElement = makeRefPtr(document().documentElement());
MediaQueryEvaluator evaluator { document().printing() ? "print" : "screen", document(), documentElement ? documentElement->computedStyle() : nullptr };
for (auto& result : m_appearanceDependentMediaQueryResults) {
LOG(MediaQueries, "HTMLPictureElement %p appearanceChangeAffectedPicture evaluating media queries", this);
if (evaluator.evaluate(result.expression) != result.result)
return true;
}
return false;
}
#if USE(SYSTEM_PREVIEW)
bool HTMLPictureElement::isSystemPreviewImage() const
{
if (!RuntimeEnabledFeatures::sharedFeatures().systemPreviewEnabled())
return false;
const auto* parent = parentElement();
if (!is<HTMLAnchorElement>(parent))
return false;
return downcast<HTMLAnchorElement>(parent)->isSystemPreviewLink();
}
#endif
}