NS_IMETHODIMP
nsImageLoadingContent::OnStartDecode(imgIRequest* aRequest)
{
NS_ENSURE_TRUE(nsContentUtils::IsCallerChrome(), NS_ERROR_NOT_AVAILABLE);
// Onload blocking. This only applies for the current request.
if (aRequest == mCurrentRequest) {
// Determine whether this is a background request (this can be the case
// with multipart/x-mixed-replace images, for example).
PRUint32 loadFlags;
nsresult rv = aRequest->GetLoadFlags(&loadFlags);
PRBool background =
(NS_SUCCEEDED(rv) && (loadFlags & nsIRequest::LOAD_BACKGROUND));
// Block onload for non-background requests
if (!background) {
NS_ABORT_IF_FALSE(!mBlockingOnload, "Shouldn't already be blocking");
SetBlockingOnload(PR_TRUE);
}
}
LOOP_OVER_OBSERVERS(OnStartDecode(aRequest));
return NS_OK;
}
/* static */ void
ProgressTracker::SyncNotifyInternal(ProxyArray& aProxies,
bool aHasImage,
Progress aProgress,
const nsIntRect& aDirtyRect)
{
MOZ_ASSERT(NS_IsMainThread());
// OnStartRequest
if (aProgress & FLAG_REQUEST_STARTED)
NOTIFY_IMAGE_OBSERVERS(aProxies, OnStartRequest());
// OnStartContainer
if (aProgress & FLAG_HAS_SIZE)
NOTIFY_IMAGE_OBSERVERS(aProxies, OnStartContainer());
// OnStartDecode
if (aProgress & FLAG_DECODE_STARTED)
NOTIFY_IMAGE_OBSERVERS(aProxies, OnStartDecode());
// BlockOnload
if (aProgress & FLAG_ONLOAD_BLOCKED)
NOTIFY_IMAGE_OBSERVERS(aProxies, BlockOnload());
if (aHasImage) {
// OnFrameUpdate
// If there's any content in this frame at all (always true for
// vector images, true for raster images that have decoded at
// least one frame) then send OnFrameUpdate.
if (!aDirtyRect.IsEmpty())
NOTIFY_IMAGE_OBSERVERS(aProxies, OnFrameUpdate(&aDirtyRect));
if (aProgress & FLAG_FRAME_STOPPED)
NOTIFY_IMAGE_OBSERVERS(aProxies, OnStopFrame());
// OnImageIsAnimated
if (aProgress & FLAG_IS_ANIMATED)
NOTIFY_IMAGE_OBSERVERS(aProxies, OnImageIsAnimated());
}
// Send UnblockOnload before OnStopDecode and OnStopRequest. This allows
// observers that can fire events when they receive those notifications to do
// so then, instead of being forced to wait for UnblockOnload.
if (aProgress & FLAG_ONLOAD_UNBLOCKED) {
NOTIFY_IMAGE_OBSERVERS(aProxies, UnblockOnload());
}
if (aProgress & FLAG_DECODE_STOPPED) {
MOZ_ASSERT(aHasImage, "Stopped decoding without ever having an image?");
NOTIFY_IMAGE_OBSERVERS(aProxies, OnStopDecode());
}
if (aProgress & FLAG_REQUEST_STOPPED) {
NOTIFY_IMAGE_OBSERVERS(aProxies,
OnStopRequest(aProgress & FLAG_MULTIPART_STOPPED));
}
}
