Hi,
Can you please help me understand how nsImageLoader::Load() work?
In the code below, i don't see where it makes network connection to
load the image.
Here is the code:
nsresult
nsImageLoader::Load(imgIRequest *aImage)
{
if (!mFrame)
return NS_ERROR_NOT_INITIALIZED;
if (!aImage)
return NS_ERROR_FAILURE;
if (mRequest) {
nsCOMPtr<nsIURI> oldURI;
mRequest->GetURI(getter_AddRefs(oldURI));
nsCOMPtr<nsIURI> newURI;
aImage->GetURI(getter_AddRefs(newURI));
PRBool eq = PR_FALSE;
nsresult rv = newURI->Equals(oldURI, &eq);
if (NS_SUCCEEDED(rv) && eq) {
return NS_OK;
}
// Now cancel the old request so it won't hold a stale ref to us.
mRequest->Cancel(NS_ERROR_FAILURE);
mRequest = nsnull;
}
// Make sure to clone into a temporary, then set mRequest, since
// cloning may notify and we don't want to trigger paints from this
// code.
nsCOMPtr<imgIRequest> newRequest;
nsresult rv = aImage->Clone(this, getter_AddRefs(newRequest));
mRequest.swap(newRequest);
return rv;
}
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