CachedResourceHandle<CachedResource> CachedResourceLoader::loadResource(CachedResource::Type type, CachedResourceRequest& request, const String& charset)
{
ASSERT(!memoryCache()->resourceForRequest(request.resourceRequest()));
LOG(ResourceLoading, "Loading CachedResource for '%s'.", request.resourceRequest().url().elidedString().latin1().data());
CachedResourceHandle<CachedResource> resource = createResource(type, request.mutableResourceRequest(), charset);
if (!memoryCache()->add(resource.get()))
resource->setOwningCachedResourceLoader(this);
#if ENABLE(RESOURCE_TIMING)
storeResourceTimingInitiatorInformation(resource, request);
#endif
return resource;
}
void ImageLoader::updateFromElement()
{
// If we're not making renderers for the page, then don't load images. We don't want to slow
// down the raw HTML parsing case by loading images we don't intend to display.
Document* document = m_element->document();
if (!document->renderer())
return;
AtomicString attr = m_element->imageSourceURL();
if (attr == m_failedLoadURL)
return;
// Do not load any image if the 'src' attribute is missing or if it is
// an empty string.
CachedResourceHandle<CachedImage> newImage = 0;
if (!attr.isNull() && !stripLeadingAndTrailingHTMLSpaces(attr).isEmpty()) {
CachedResourceRequest request(ResourceRequest(document->completeURL(sourceURI(attr))));
request.setInitiator(element());
String crossOriginMode = m_element->fastGetAttribute(HTMLNames::crossoriginAttr);
if (!crossOriginMode.isNull()) {
StoredCredentials allowCredentials = equalIgnoringCase(crossOriginMode, "use-credentials") ? AllowStoredCredentials : DoNotAllowStoredCredentials;
updateRequestForAccessControl(request.mutableResourceRequest(), document->securityOrigin(), allowCredentials);
}
if (m_loadManually) {
bool autoLoadOtherImages = document->cachedResourceLoader()->autoLoadImages();
document->cachedResourceLoader()->setAutoLoadImages(false);
newImage = new CachedImage(request.resourceRequest());
newImage->setLoading(true);
newImage->setOwningCachedResourceLoader(document->cachedResourceLoader());
document->cachedResourceLoader()->m_documentResources.set(newImage->url(), newImage.get());
document->cachedResourceLoader()->setAutoLoadImages(autoLoadOtherImages);
} else
newImage = document->cachedResourceLoader()->requestImage(request);
// If we do not have an image here, it means that a cross-site
// violation occurred, or that the image was blocked via Content
// Security Policy, or the page is being dismissed. Trigger an
// error event if the page is not being dismissed.
if (!newImage && !pageIsBeingDismissed(document)) {
m_failedLoadURL = attr;
m_hasPendingErrorEvent = true;
errorEventSender().dispatchEventSoon(this);
} else
clearFailedLoadURL();
} else if (!attr.isNull()) {
// Fire an error event if the url is empty.
// FIXME: Should we fire this event asynchronoulsy via errorEventSender()?
m_element->dispatchEvent(Event::create(eventNames().errorEvent, false, false));
}
CachedImage* oldImage = m_image.get();
if (newImage != oldImage) {
if (m_hasPendingBeforeLoadEvent) {
beforeLoadEventSender().cancelEvent(this);
m_hasPendingBeforeLoadEvent = false;
}
if (m_hasPendingLoadEvent) {
loadEventSender().cancelEvent(this);
m_hasPendingLoadEvent = false;
}
// Cancel error events that belong to the previous load, which is now cancelled by changing the src attribute.
// If newImage is null and m_hasPendingErrorEvent is true, we know the error event has been just posted by
// this load and we should not cancel the event.
// FIXME: If both previous load and this one got blocked with an error, we can receive one error event instead of two.
if (m_hasPendingErrorEvent && newImage) {
errorEventSender().cancelEvent(this);
m_hasPendingErrorEvent = false;
}
m_image = newImage;
m_hasPendingBeforeLoadEvent = !m_element->document()->isImageDocument() && newImage;
m_hasPendingLoadEvent = newImage;
m_imageComplete = !newImage;
if (newImage) {
if (!m_element->document()->isImageDocument()) {
if (!m_element->document()->hasListenerType(Document::BEFORELOAD_LISTENER))
dispatchPendingBeforeLoadEvent();
else
beforeLoadEventSender().dispatchEventSoon(this);
} else
updateRenderer();
// If newImage is cached, addClient() will result in the load event
// being queued to fire. Ensure this happens after beforeload is
// dispatched.
newImage->addClient(this);
}
if (oldImage)
oldImage->removeClient(this);
}
if (RenderImageResource* imageResource = renderImageResource())
imageResource->resetAnimation();
// Only consider updating the protection ref-count of the Element immediately before returning
// from this function as doing so might result in the destruction of this ImageLoader.
updatedHasPendingEvent();
}