#pragma once
#include "CachedImageClient.h"
#include "CachedResourceHandle.h"
#include "Element.h"
#include "Timer.h"
#include <wtf/Vector.h>
#include <wtf/text/AtomString.h>
namespace WebCore {
class DeferredPromise;
class Document;
class ImageLoader;
class Page;
class RenderImageResource;
template<typename T> class EventSender;
typedef EventSender<ImageLoader> ImageEventSender;
enum class RelevantMutation : bool { Yes, No };
class ImageLoader : public CachedImageClient {
WTF_MAKE_FAST_ALLOCATED;
public:
virtual ~ImageLoader();
void updateFromElement(RelevantMutation = RelevantMutation::No);
void updateFromElementIgnoringPreviousError(RelevantMutation = RelevantMutation::No);
void elementDidMoveToNewDocument(Document&);
Element& element() { return m_element; }
const Element& element() const { return m_element; }
bool imageComplete() const { return m_imageComplete; }
CachedImage* image() const { return m_image.get(); }
void clearImage();
size_t pendingDecodePromisesCountForTesting() const { return m_decodingPromises.size(); }
void decode(Ref<DeferredPromise>&&);
void setLoadManually(bool loadManually) { m_loadManually = loadManually; }
bool hasPendingBeforeLoadEvent() const { return m_hasPendingBeforeLoadEvent; }
bool hasPendingActivity() const { return m_hasPendingLoadEvent || m_hasPendingErrorEvent; }
void dispatchPendingEvent(ImageEventSender*);
static void dispatchPendingBeforeLoadEvents(Page*);
static void dispatchPendingLoadEvents(Page*);
static void dispatchPendingErrorEvents(Page*);
void loadDeferredImage();
bool isDeferred() const { return m_lazyImageLoadState == LazyImageLoadState::Deferred; }
Document& document() { return m_element.document(); }
protected:
explicit ImageLoader(Element&);
void notifyFinished(CachedResource&, const NetworkLoadMetrics&) override;
private:
enum class LazyImageLoadState : uint8_t { None, Deferred, LoadImmediately, FullImage };
virtual void dispatchLoadEvent() = 0;
virtual String sourceURI(const AtomString&) const = 0;
void updatedHasPendingEvent();
void dispatchPendingBeforeLoadEvent();
void dispatchPendingLoadEvent();
void dispatchPendingErrorEvent();
RenderImageResource* renderImageResource();
void updateRenderer();
void clearImageWithoutConsideringPendingLoadEvent();
void clearFailedLoadURL();
bool hasPendingDecodePromises() const { return !m_decodingPromises.isEmpty(); }
void resolveDecodePromises();
void rejectDecodePromises(const char* message);
void decode();
void timerFired();
Element& m_element;
CachedResourceHandle<CachedImage> m_image;
Timer m_derefElementTimer;
RefPtr<Element> m_protectedElement;
AtomString m_failedLoadURL;
Vector<RefPtr<DeferredPromise>> m_decodingPromises;
bool m_hasPendingBeforeLoadEvent : 1;
bool m_hasPendingLoadEvent : 1;
bool m_hasPendingErrorEvent : 1;
bool m_imageComplete : 1;
bool m_loadManually : 1;
bool m_elementIsProtected : 1;
LazyImageLoadState m_lazyImageLoadState { LazyImageLoadState::None };
};
}