HTMLPictureElement.cpp [plain text]
#include "config.h"
#include "HTMLPictureElement.h"
#include "ElementChildIterator.h"
#include "HTMLImageElement.h"
#include "HTMLNames.h"
namespace WebCore {
HTMLPictureElement::HTMLPictureElement(const QualifiedName& tagName, Document& document)
: HTMLElement(tagName, document)
{
}
HTMLPictureElement::~HTMLPictureElement()
{
document().removeViewportDependentPicture(*this);
}
void HTMLPictureElement::didMoveToNewDocument(Document* oldDocument)
{
if (oldDocument)
oldDocument->removeViewportDependentPicture(*this);
HTMLElement::didMoveToNewDocument(oldDocument);
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 = document().documentElement();
MediaQueryEvaluator evaluator { document().printing() ? "print" : "screen", document(), documentElement ? documentElement->computedStyle() : nullptr };
for (auto& result : m_viewportDependentMediaQueryResults) {
if (evaluator.evaluate(result.expression) != result.result)
return true;
}
return false;
}
}