Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 381 insertions, 0 deletions

diff --git a/dom/html/HTMLIFrameElement.cpp b/dom/html/HTMLIFrameElement.cpp
new file mode 100644
index 0000000000..97363ccbff
--- /dev/null
+++ b/dom/html/HTMLIFrameElement.cpp
@@ -0,0 +1,381 @@
+/* -*- 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
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#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;
+  }
+
+  // https://html.spec.whatwg.org/multipage/urls-and-fetching.html#will-lazy-load-element-steps
+  // "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