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implement lazy-loading

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ownedbywuigi 2026-03-27 12:38:53 +00:00
commit 629f4db8fe
5 changed files with 179 additions and 0 deletions
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20
dom/html/HTMLImageElement.h
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@ -13,6 +13,7 @@
#include "imgRequestProxy.h"
#include "Units.h"
#include "nsCycleCollectionParticipant.h"
#include "nsITimer.h"
namespace mozilla {
class EventChainPreVisitor;
@ -168,6 +169,14 @@ public:
{
SetHTMLAttr(nsGkAtoms::usemap, aUseMap, aError);
}
void GetLoading(nsAString& aLoading)
{
GetHTMLAttr(nsGkAtoms::loading, aLoading);
}
void SetLoading(const nsAString& aLoading, ErrorResult& aError)
{
SetHTMLAttr(nsGkAtoms::loading, aLoading, aError);
}
void SetName(const nsAString& aName, ErrorResult& aError)
{
SetHTMLAttr(nsGkAtoms::name, aName, aError);
@ -360,6 +369,15 @@ protected:
RefPtr<ResponsiveImageSelector> mResponsiveSelector;
private:
static void LazyLoadTimerCallback(nsITimer* aTimer, void* aClosure);
bool ShouldLazyLoadImage() const;
bool IsProbablyVisibleForLazyLoad() const;
bool ShouldDeferImageLoad() const;
void EnsureLazyLoadTimer();
void StopLazyLoadTimer();
void MaybeLoadImageFromLazyTimer();
bool SourceElementMatches(nsIContent* aSourceNode);
static void MapAttributesIntoRule(const nsMappedAttributes* aAttributes,
@ -392,6 +410,8 @@ private:
RefPtr<ImageLoadTask> mPendingImageLoadTask;
nsCOMPtr<nsIPrincipal> mSrcTriggeringPrincipal;
nsCOMPtr<nsIPrincipal> mSrcsetTriggeringPrincipal;
nsCOMPtr<nsITimer> mLazyLoadTimer;
bool mLazyLoadAlwaysLoad;
// Last URL that was attempted to load by this element.
nsCOMPtr<nsIURI> mLastSelectedSource;