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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "mozilla/dom/DOMIntersectionObserver.h"
#include "mozilla/dom/HTMLIFrameElement.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/HTMLIFrameElementBinding.h"
#include "mozilla/dom/FeaturePolicy.h"
#include "mozilla/MappedDeclarationsBuilder.h"
#include "mozilla/NullPrincipal.h"
#include "mozilla/StaticPrefs_dom.h"
#include "nsSubDocumentFrame.h"
#include "nsError.h"
#include "nsContentUtils.h"
#include "nsSandboxFlags.h"
#include "nsNetUtil.h"
NS_IMPL_NS_NEW_HTML_ELEMENT_CHECK_PARSER(IFrame)
namespace mozilla::dom {
NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLIFrameElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLIFrameElement,
nsGenericHTMLFrameElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFeaturePolicy)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSandbox)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLIFrameElement,
nsGenericHTMLFrameElement)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mFeaturePolicy)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSandbox)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_ADDREF_INHERITED(HTMLIFrameElement, nsGenericHTMLFrameElement)
NS_IMPL_RELEASE_INHERITED(HTMLIFrameElement, nsGenericHTMLFrameElement)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(HTMLIFrameElement)
NS_INTERFACE_MAP_END_INHERITING(nsGenericHTMLFrameElement)
// static
const DOMTokenListSupportedToken HTMLIFrameElement::sSupportedSandboxTokens[] =
{
#define SANDBOX_KEYWORD(string, atom, flags) string,
#include "IframeSandboxKeywordList.h"
#undef SANDBOX_KEYWORD
nullptr};
HTMLIFrameElement::HTMLIFrameElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
FromParser aFromParser)
: nsGenericHTMLFrameElement(std::move(aNodeInfo), aFromParser) {
// We always need a featurePolicy, even if not exposed.
mFeaturePolicy = new mozilla::dom::FeaturePolicy(this);
nsCOMPtr<nsIPrincipal> origin = GetFeaturePolicyDefaultOrigin();
MOZ_ASSERT(origin);
mFeaturePolicy->SetDefaultOrigin(origin);
}
HTMLIFrameElement::~HTMLIFrameElement() = default;
NS_IMPL_ELEMENT_CLONE(HTMLIFrameElement)
void HTMLIFrameElement::BindToBrowsingContext(BrowsingContext*) {
RefreshFeaturePolicy(true /* parse the feature policy attribute */);
}
bool HTMLIFrameElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult) {
if (aNamespaceID == kNameSpaceID_None) {
if (aAttribute == nsGkAtoms::marginwidth) {
return aResult.ParseNonNegativeIntValue(aValue);
}
if (aAttribute == nsGkAtoms::marginheight) {
return aResult.ParseNonNegativeIntValue(aValue);
}
if (aAttribute == nsGkAtoms::width) {
return aResult.ParseHTMLDimension(aValue);
}
if (aAttribute == nsGkAtoms::height) {
return aResult.ParseHTMLDimension(aValue);
}
if (aAttribute == nsGkAtoms::frameborder) {
return ParseFrameborderValue(aValue, aResult);
}
if (aAttribute == nsGkAtoms::scrolling) {
return ParseScrollingValue(aValue, aResult);
}
if (aAttribute == nsGkAtoms::align) {
return ParseAlignValue(aValue, aResult);
}
if (aAttribute == nsGkAtoms::sandbox) {
aResult.ParseAtomArray(aValue);
return true;
}
if (aAttribute == nsGkAtoms::loading) {
return ParseLoadingAttribute(aValue, aResult);
}
}
return nsGenericHTMLFrameElement::ParseAttribute(
aNamespaceID, aAttribute, aValue, aMaybeScriptedPrincipal, aResult);
}
void HTMLIFrameElement::MapAttributesIntoRule(
MappedDeclarationsBuilder& aBuilder) {
// frameborder: 0 | 1 (| NO | YES in quirks mode)
// If frameborder is 0 or No, set border to 0
// else leave it as the value set in html.css
const nsAttrValue* value = aBuilder.GetAttr(nsGkAtoms::frameborder);
if (value && value->Type() == nsAttrValue::eEnum) {
auto frameborder = static_cast<FrameBorderProperty>(value->GetEnumValue());
if (FrameBorderProperty::No == frameborder ||
FrameBorderProperty::Zero == frameborder) {
aBuilder.SetPixelValueIfUnset(eCSSProperty_border_top_width, 0.0f);
aBuilder.SetPixelValueIfUnset(eCSSProperty_border_right_width, 0.0f);
aBuilder.SetPixelValueIfUnset(eCSSProperty_border_bottom_width, 0.0f);
aBuilder.SetPixelValueIfUnset(eCSSProperty_border_left_width, 0.0f);
}
}
nsGenericHTMLElement::MapImageSizeAttributesInto(aBuilder);
nsGenericHTMLElement::MapImageAlignAttributeInto(aBuilder);
nsGenericHTMLElement::MapCommonAttributesInto(aBuilder);
}
NS_IMETHODIMP_(bool)
HTMLIFrameElement::IsAttributeMapped(const nsAtom* aAttribute) const {
static const MappedAttributeEntry attributes[] = {
{nsGkAtoms::width},
{nsGkAtoms::height},
{nsGkAtoms::frameborder},
{nullptr},
};
static const MappedAttributeEntry* const map[] = {
attributes,
sImageAlignAttributeMap,
sCommonAttributeMap,
};
return FindAttributeDependence(aAttribute, map);
}
nsMapRuleToAttributesFunc HTMLIFrameElement::GetAttributeMappingFunction()
const {
return &MapAttributesIntoRule;
}
void HTMLIFrameElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue,
nsIPrincipal* aMaybeScriptedPrincipal,
bool aNotify) {
AfterMaybeChangeAttr(aNameSpaceID, aName, aNotify);
if (aNameSpaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::loading) {
if (aValue && Loading(aValue->GetEnumValue()) == Loading::Lazy) {
SetLazyLoading();
} else if (aOldValue &&
Loading(aOldValue->GetEnumValue()) == Loading::Lazy) {
StopLazyLoading();
}
}
// If lazy loading and src set, set lazy loading again as we are doing a new
// load (lazy loading is unset after a load is complete).
if ((aName == nsGkAtoms::src || aName == nsGkAtoms::srcdoc) &&
LoadingState() == Loading::Lazy) {
SetLazyLoading();
}
if (aName == nsGkAtoms::sandbox) {
if (mFrameLoader) {
// If we have an nsFrameLoader, apply the new sandbox flags.
// Since this is called after the setter, the sandbox flags have
// alreay been updated.
mFrameLoader->ApplySandboxFlags(GetSandboxFlags());
}
}
if (aName == nsGkAtoms::allow || aName == nsGkAtoms::src ||
aName == nsGkAtoms::srcdoc || aName == nsGkAtoms::sandbox) {
RefreshFeaturePolicy(true /* parse the feature policy attribute */);
} else if (aName == nsGkAtoms::allowfullscreen) {
RefreshFeaturePolicy(false /* parse the feature policy attribute */);
}
}
return nsGenericHTMLFrameElement::AfterSetAttr(
aNameSpaceID, aName, aValue, aOldValue, aMaybeScriptedPrincipal, aNotify);
}
void HTMLIFrameElement::OnAttrSetButNotChanged(
int32_t aNamespaceID, nsAtom* aName, const nsAttrValueOrString& aValue,
bool aNotify) {
AfterMaybeChangeAttr(aNamespaceID, aName, aNotify);
return nsGenericHTMLFrameElement::OnAttrSetButNotChanged(aNamespaceID, aName,
aValue, aNotify);
}
void HTMLIFrameElement::AfterMaybeChangeAttr(int32_t aNamespaceID,
nsAtom* aName, bool aNotify) {
if (aNamespaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::srcdoc) {
// Don't propagate errors from LoadSrc. The attribute was successfully
// set/unset, that's what we should reflect.
LoadSrc();
}
}
}
uint32_t HTMLIFrameElement::GetSandboxFlags() const {
const nsAttrValue* sandboxAttr = GetParsedAttr(nsGkAtoms::sandbox);
// No sandbox attribute, no sandbox flags.
if (!sandboxAttr) {
return SANDBOXED_NONE;
}
return nsContentUtils::ParseSandboxAttributeToFlags(sandboxAttr);
}
JSObject* HTMLIFrameElement::WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return HTMLIFrameElement_Binding::Wrap(aCx, this, aGivenProto);
}
mozilla::dom::FeaturePolicy* HTMLIFrameElement::FeaturePolicy() const {
return mFeaturePolicy;
}
void HTMLIFrameElement::MaybeStoreCrossOriginFeaturePolicy() {
if (!mFrameLoader) {
return;
}
// If the browsingContext is not ready (because docshell is dead), don't try
// to create one.
if (!mFrameLoader->IsRemoteFrame() && !mFrameLoader->GetExistingDocShell()) {
return;
}
RefPtr<BrowsingContext> browsingContext = mFrameLoader->GetBrowsingContext();
if (!browsingContext || !browsingContext->IsContentSubframe()) {
return;
}
if (ContentChild* cc = ContentChild::GetSingleton()) {
Unused << cc->SendSetContainerFeaturePolicy(browsingContext,
mFeaturePolicy);
}
}
already_AddRefed<nsIPrincipal>
HTMLIFrameElement::GetFeaturePolicyDefaultOrigin() const {
nsCOMPtr<nsIPrincipal> principal;
if (HasAttr(nsGkAtoms::srcdoc)) {
principal = NodePrincipal();
return principal.forget();
}
nsCOMPtr<nsIURI> nodeURI;
if (GetURIAttr(nsGkAtoms::src, nullptr, getter_AddRefs(nodeURI)) && nodeURI) {
principal = BasePrincipal::CreateContentPrincipal(
nodeURI, BasePrincipal::Cast(NodePrincipal())->OriginAttributesRef());
}
if (!principal) {
principal = NodePrincipal();
}
return principal.forget();
}
void HTMLIFrameElement::RefreshFeaturePolicy(bool aParseAllowAttribute) {
if (aParseAllowAttribute) {
mFeaturePolicy->ResetDeclaredPolicy();
// The origin can change if 'src' and 'srcdoc' attributes change.
nsCOMPtr<nsIPrincipal> origin = GetFeaturePolicyDefaultOrigin();
MOZ_ASSERT(origin);
mFeaturePolicy->SetDefaultOrigin(origin);
nsAutoString allow;
GetAttr(nsGkAtoms::allow, allow);
if (!allow.IsEmpty()) {
// Set or reset the FeaturePolicy directives.
mFeaturePolicy->SetDeclaredPolicy(OwnerDoc(), allow, NodePrincipal(),
origin);
}
}
if (AllowFullscreen()) {
mFeaturePolicy->MaybeSetAllowedPolicy(u"fullscreen"_ns);
}
mFeaturePolicy->InheritPolicy(OwnerDoc()->FeaturePolicy());
MaybeStoreCrossOriginFeaturePolicy();
}
void HTMLIFrameElement::UpdateLazyLoadState() {
// Store current base URI and referrer policy in the lazy load state.
mLazyLoadState.mBaseURI = GetBaseURI();
mLazyLoadState.mReferrerPolicy = GetReferrerPolicyAsEnum();
}
nsresult HTMLIFrameElement::BindToTree(BindContext& aContext,
nsINode& aParent) {
// Update lazy load state on bind to tree again if lazy loading, as the
// loading attribute could be set before others.
if (mLazyLoading) {
UpdateLazyLoadState();
}
return nsGenericHTMLFrameElement::BindToTree(aContext, aParent);
}
void HTMLIFrameElement::SetLazyLoading() {
if (mLazyLoading) {
return;
}
if (!StaticPrefs::dom_iframe_lazy_loading_enabled()) {
return;
}
// "If scripting is disabled for element, then return false."
Document* doc = OwnerDoc();
if (!doc->IsScriptEnabled() || doc->IsStaticDocument()) {
return;
}
doc->EnsureLazyLoadObserver().Observe(*this);
mLazyLoading = true;
UpdateLazyLoadState();
}
void HTMLIFrameElement::StopLazyLoading() {
if (!mLazyLoading) {
return;
}
mLazyLoading = false;
Document* doc = OwnerDoc();
if (auto* obs = doc->GetLazyLoadObserver()) {
obs->Unobserve(*this);
}
LoadSrc();
mLazyLoadState.Clear();
if (nsSubDocumentFrame* ourFrame = do_QueryFrame(GetPrimaryFrame())) {
ourFrame->ResetFrameLoader(nsSubDocumentFrame::RetainPaintData::No);
}
}
void HTMLIFrameElement::NodeInfoChanged(Document* aOldDoc) {
nsGenericHTMLElement::NodeInfoChanged(aOldDoc);
if (mLazyLoading) {
aOldDoc->GetLazyLoadObserver()->Unobserve(*this);
mLazyLoading = false;
SetLazyLoading();
}
}
} // namespace mozilla::dom