nsresult ResourceReader::OnWalkURI(const nsACString& aURISpec,
nsContentPolicyType aContentPolicyType) {
nsresult rv;
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri), aURISpec, mParent->GetCharacterSet(),
mCurrentBaseURI);
NS_ENSURE_SUCCESS(rv, rv);
return OnWalkURI(uri, aContentPolicyType);
}
nsresult ResourceReader::OnWalkAttribute(Element* aElement,
nsContentPolicyType aContentPolicyType,
const char* aAttribute,
const char* aNamespaceURI) {
nsAutoCString uriSpec;
ExtractAttribute(aElement, aAttribute, aNamespaceURI, uriSpec);
if (uriSpec.IsEmpty()) {
return NS_OK;
}
return OnWalkURI(uriSpec, aContentPolicyType);
}
nsresult
ResourceReader::OnWalkAttribute(nsIDOMNode* aNode,
const char* aAttribute,
const char* aNamespaceURI)
{
nsAutoCString uriSpec;
nsresult rv = ExtractAttribute(aNode, aAttribute, aNamespaceURI, uriSpec);
NS_ENSURE_SUCCESS(rv, rv);
if (uriSpec.IsEmpty()) {
return NS_OK;
}
return OnWalkURI(uriSpec);
}
nsresult ResourceReader::OnWalkDOMNode(nsINode* aNode) {
// Fixup xml-stylesheet processing instructions
if (auto nodeAsPI = dom::ProcessingInstruction::FromNode(aNode)) {
nsAutoString target;
nodeAsPI->GetTarget(target);
if (target.EqualsLiteral("xml-stylesheet")) {
nsAutoString href;
GetXMLStyleSheetLink(nodeAsPI, href);
if (!href.IsEmpty()) {
return OnWalkURI(NS_ConvertUTF16toUTF8(href),
nsIContentPolicy::TYPE_STYLESHEET);
}
}
return NS_OK;
}
// Test the node to see if it's an image, frame, iframe, css, js
if (aNode->IsHTMLElement(nsGkAtoms::img)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"src");
}
if (aNode->IsSVGElement(nsGkAtoms::img)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"href", "http://www.w3.org/1999/xlink");
}
if (aNode->IsAnyOfHTMLElements(nsGkAtoms::audio, nsGkAtoms::video)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_MEDIA,
"src");
}
if (aNode->IsHTMLElement(nsGkAtoms::source)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_MEDIA,
"src");
}
if (aNode->IsHTMLElement(nsGkAtoms::body)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"background");
}
if (aNode->IsHTMLElement(nsGkAtoms::table)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"background");
}
if (aNode->IsHTMLElement(nsGkAtoms::tr)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"background");
}
if (aNode->IsAnyOfHTMLElements(nsGkAtoms::td, nsGkAtoms::th)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"background");
}
if (aNode->IsHTMLElement(nsGkAtoms::script)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_SCRIPT,
"src");
}
if (aNode->IsSVGElement(nsGkAtoms::script)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_SCRIPT,
"href", "http://www.w3.org/1999/xlink");
}
if (aNode->IsHTMLElement(nsGkAtoms::embed)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_OBJECT,
"src");
}
if (aNode->IsHTMLElement(nsGkAtoms::object)) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_OBJECT,
"data");
}
if (auto nodeAsLink = dom::HTMLLinkElement::FromNode(aNode)) {
// Test if the link has a rel value indicating it to be a stylesheet
nsAutoString linkRel;
nodeAsLink->GetRel(linkRel);
if (!linkRel.IsEmpty()) {
nsReadingIterator<char16_t> start;
nsReadingIterator<char16_t> end;
nsReadingIterator<char16_t> current;
linkRel.BeginReading(start);
linkRel.EndReading(end);
// Walk through space delimited string looking for "stylesheet"
for (current = start; current != end; ++current) {
// Ignore whitespace
if (nsCRT::IsAsciiSpace(*current)) {
continue;
}
// Grab the next space delimited word
nsReadingIterator<char16_t> startWord = current;
do {
++current;
} while (current != end && !nsCRT::IsAsciiSpace(*current));
// Store the link for fix up if it says "stylesheet"
if (Substring(startWord, current)
.LowerCaseEqualsLiteral("stylesheet")) {
OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_STYLESHEET,
"href");
return NS_OK;
}
if (current == end) {
break;
}
}
}
return NS_OK;
}
if (aNode->IsHTMLElement(nsGkAtoms::frame)) {
return OnWalkSubframe(aNode);
}
if (aNode->IsHTMLElement(nsGkAtoms::iframe) &&
!(mPersistFlags & IWBP::PERSIST_FLAGS_IGNORE_IFRAMES)) {
return OnWalkSubframe(aNode);
}
auto nodeAsInput = dom::HTMLInputElement::FromNode(aNode);
if (nodeAsInput) {
return OnWalkAttribute(aNode->AsElement(), nsIContentPolicy::TYPE_IMAGE,
"src");
}
return NS_OK;
}
nsresult
ResourceReader::OnWalkDOMNode(nsIDOMNode* aNode)
{
nsresult rv;
// Fixup xml-stylesheet processing instructions
nsCOMPtr<nsIDOMProcessingInstruction> nodeAsPI = do_QueryInterface(aNode);
if (nodeAsPI) {
nsAutoString target;
rv = nodeAsPI->GetTarget(target);
NS_ENSURE_SUCCESS(rv, rv);
if (target.EqualsLiteral("xml-stylesheet")) {
nsAutoString href;
GetXMLStyleSheetLink(nodeAsPI, href);
if (!href.IsEmpty()) {
return OnWalkURI(NS_ConvertUTF16toUTF8(href));
}
}
return NS_OK;
}
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
if (!content) {
return NS_OK;
}
// Test the node to see if it's an image, frame, iframe, css, js
nsCOMPtr<nsIDOMHTMLImageElement> nodeAsImage = do_QueryInterface(aNode);
if (nodeAsImage) {
return OnWalkAttribute(aNode, "src");
}
if (content->IsSVGElement(nsGkAtoms::img)) {
return OnWalkAttribute(aNode, "href", "http://www.w3.org/1999/xlink");
}
nsCOMPtr<nsIDOMHTMLMediaElement> nodeAsMedia = do_QueryInterface(aNode);
if (nodeAsMedia) {
return OnWalkAttribute(aNode, "src");
}
nsCOMPtr<nsIDOMHTMLSourceElement> nodeAsSource = do_QueryInterface(aNode);
if (nodeAsSource) {
return OnWalkAttribute(aNode, "src");
}
if (content->IsHTMLElement(nsGkAtoms::body)) {
return OnWalkAttribute(aNode, "background");
}
if (content->IsHTMLElement(nsGkAtoms::table)) {
return OnWalkAttribute(aNode, "background");
}
if (content->IsHTMLElement(nsGkAtoms::tr)) {
return OnWalkAttribute(aNode, "background");
}
if (content->IsAnyOfHTMLElements(nsGkAtoms::td, nsGkAtoms::th)) {
return OnWalkAttribute(aNode, "background");
}
nsCOMPtr<nsIDOMHTMLScriptElement> nodeAsScript = do_QueryInterface(aNode);
if (nodeAsScript) {
return OnWalkAttribute(aNode, "src");
}
if (content->IsSVGElement(nsGkAtoms::script)) {
return OnWalkAttribute(aNode, "href", "http://www.w3.org/1999/xlink");
}
nsCOMPtr<nsIDOMHTMLEmbedElement> nodeAsEmbed = do_QueryInterface(aNode);
if (nodeAsEmbed) {
return OnWalkAttribute(aNode, "src");
}
nsCOMPtr<nsIDOMHTMLObjectElement> nodeAsObject = do_QueryInterface(aNode);
if (nodeAsObject) {
return OnWalkAttribute(aNode, "data");
}
nsCOMPtr<nsIDOMHTMLAppletElement> nodeAsApplet = do_QueryInterface(aNode);
if (nodeAsApplet) {
// For an applet, relative URIs are resolved relative to the
// codebase (which is resolved relative to the base URI).
nsCOMPtr<nsIURI> oldBase = mCurrentBaseURI;
nsAutoString codebase;
rv = nodeAsApplet->GetCodeBase(codebase);
NS_ENSURE_SUCCESS(rv, rv);
if (!codebase.IsEmpty()) {
nsCOMPtr<nsIURI> baseURI;
rv = NS_NewURI(getter_AddRefs(baseURI), codebase,
mParent->GetCharacterSet().get(), mCurrentBaseURI);
NS_ENSURE_SUCCESS(rv, rv);
if (baseURI) {
mCurrentBaseURI = baseURI;
// Must restore this before returning (or ENSURE'ing).
}
}
// We only store 'code' locally if there is no 'archive',
// otherwise we assume the archive file(s) contains it (bug 430283).
nsAutoCString archiveAttr;
rv = ExtractAttribute(aNode, "archive", "", archiveAttr);
if (NS_SUCCEEDED(rv)) {
if (!archiveAttr.IsEmpty()) {
rv = OnWalkURI(archiveAttr);
} else {
rv = OnWalkAttribute(aNode, "core");
}
}
// restore the base URI we really want to have
mCurrentBaseURI = oldBase;
return rv;
}
nsCOMPtr<nsIDOMHTMLLinkElement> nodeAsLink = do_QueryInterface(aNode);
if (nodeAsLink) {
// Test if the link has a rel value indicating it to be a stylesheet
nsAutoString linkRel;
if (NS_SUCCEEDED(nodeAsLink->GetRel(linkRel)) && !linkRel.IsEmpty()) {
nsReadingIterator<char16_t> start;
nsReadingIterator<char16_t> end;
nsReadingIterator<char16_t> current;
linkRel.BeginReading(start);
linkRel.EndReading(end);
// Walk through space delimited string looking for "stylesheet"
for (current = start; current != end; ++current) {
// Ignore whitespace
if (nsCRT::IsAsciiSpace(*current)) {
continue;
}
// Grab the next space delimited word
nsReadingIterator<char16_t> startWord = current;
do {
++current;
} while (current != end && !nsCRT::IsAsciiSpace(*current));
// Store the link for fix up if it says "stylesheet"
if (Substring(startWord, current)
.LowerCaseEqualsLiteral("stylesheet")) {
OnWalkAttribute(aNode, "href");
return NS_OK;
}
if (current == end) {
break;
}
}
}
return NS_OK;
}
nsCOMPtr<nsIDOMHTMLFrameElement> nodeAsFrame = do_QueryInterface(aNode);
if (nodeAsFrame) {
return OnWalkSubframe(aNode);
}
nsCOMPtr<nsIDOMHTMLIFrameElement> nodeAsIFrame = do_QueryInterface(aNode);
if (nodeAsIFrame && !(mPersistFlags &
IWBP::PERSIST_FLAGS_IGNORE_IFRAMES)) {
return OnWalkSubframe(aNode);
}
nsCOMPtr<nsIDOMHTMLInputElement> nodeAsInput = do_QueryInterface(aNode);
if (nodeAsInput) {
return OnWalkAttribute(aNode, "src");
}
return NS_OK;
}