1 files changed, 244 insertions, 0 deletions
diff --git a/dom/html/HTMLEmbedElement.cpp b/dom/html/HTMLEmbedElement.cpp
new file mode 100644
index 0000000000..34d79defbf
--- /dev/null
+++ b/dom/html/HTMLEmbedElement.cpp
@@ -0,0 +1,244 @@
+/* -*- 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/BindContext.h"
+#include "mozilla/dom/HTMLEmbedElement.h"
+#include "mozilla/dom/HTMLEmbedElementBinding.h"
+#include "mozilla/dom/ElementInlines.h"
+
+#include "mozilla/dom/Document.h"
+#include "nsObjectLoadingContent.h"
+#include "nsThreadUtils.h"
+#include "nsIWidget.h"
+#include "nsContentUtils.h"
+#include "nsFrameLoader.h"
+#ifdef XP_MACOSX
+#  include "mozilla/EventDispatcher.h"
+#  include "mozilla/dom/Event.h"
+#endif
+
+NS_IMPL_NS_NEW_HTML_ELEMENT_CHECK_PARSER(Embed)
+
+namespace mozilla::dom {
+
+HTMLEmbedElement::HTMLEmbedElement(
+    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
+    FromParser aFromParser)
+    : nsGenericHTMLElement(std::move(aNodeInfo)) {
+  SetIsNetworkCreated(aFromParser == FROM_PARSER_NETWORK);
+}
+
+HTMLEmbedElement::~HTMLEmbedElement() = default;
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLEmbedElement)
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLEmbedElement,
+                                                  nsGenericHTMLElement)
+  nsObjectLoadingContent::Traverse(tmp, cb);
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLEmbedElement,
+                                                nsGenericHTMLElement)
+  nsObjectLoadingContent::Unlink(tmp);
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(
+    HTMLEmbedElement, nsGenericHTMLElement, nsIRequestObserver,
+    nsIStreamListener, nsFrameLoaderOwner, nsIObjectLoadingContent,
+    nsIChannelEventSink)
+
+NS_IMPL_ELEMENT_CLONE(HTMLEmbedElement)
+
+nsresult HTMLEmbedElement::BindToTree(BindContext& aContext, nsINode& aParent) {
+  nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (IsInComposedDoc()) {
+    void (HTMLEmbedElement::*start)() = &HTMLEmbedElement::StartObjectLoad;
+    nsContentUtils::AddScriptRunner(
+        NewRunnableMethod("dom::HTMLEmbedElement::BindToTree", this, start));
+  }
+
+  return NS_OK;
+}
+
+void HTMLEmbedElement::UnbindFromTree(bool aNullParent) {
+  nsObjectLoadingContent::UnbindFromTree(aNullParent);
+  nsGenericHTMLElement::UnbindFromTree(aNullParent);
+}
+
+void HTMLEmbedElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
+                                    const nsAttrValue* aValue,
+                                    const nsAttrValue* aOldValue,
+                                    nsIPrincipal* aSubjectPrincipal,
+                                    bool aNotify) {
+  if (aValue) {
+    AfterMaybeChangeAttr(aNamespaceID, aName, aNotify);
+  }
+
+  if (aNamespaceID == kNameSpaceID_None &&
+      aName == nsGkAtoms::allowfullscreen && mFrameLoader) {
+    if (auto* bc = mFrameLoader->GetExtantBrowsingContext()) {
+      MOZ_ALWAYS_SUCCEEDS(bc->SetFullscreenAllowedByOwner(AllowFullscreen()));
+    }
+  }
+
+  return nsGenericHTMLElement::AfterSetAttr(
+      aNamespaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
+}
+
+void HTMLEmbedElement::OnAttrSetButNotChanged(int32_t aNamespaceID,
+                                              nsAtom* aName,
+                                              const nsAttrValueOrString& aValue,
+                                              bool aNotify) {
+  AfterMaybeChangeAttr(aNamespaceID, aName, aNotify);
+  return nsGenericHTMLElement::OnAttrSetButNotChanged(aNamespaceID, aName,
+                                                      aValue, aNotify);
+}
+
+void HTMLEmbedElement::AfterMaybeChangeAttr(int32_t aNamespaceID, nsAtom* aName,
+                                            bool aNotify) {
+  if (aNamespaceID != kNameSpaceID_None || aName != nsGkAtoms::src) {
+    return;
+  }
+  // If aNotify is false, we are coming from the parser or some such place;
+  // we'll get bound after all the attributes have been set, so we'll do the
+  // object load from BindToTree.
+  // Skip the LoadObject call in that case.
+  // We also don't want to start loading the object when we're not yet in
+  // a document, just in case that the caller wants to set additional
+  // attributes before inserting the node into the document.
+  if (!aNotify || !IsInComposedDoc() || BlockEmbedOrObjectContentLoading()) {
+    return;
+  }
+  nsContentUtils::AddScriptRunner(NS_NewRunnableFunction(
+      "HTMLEmbedElement::LoadObject",
+      [self = RefPtr<HTMLEmbedElement>(this), aNotify]() {
+        if (self->IsInComposedDoc()) {
+          self->LoadObject(aNotify, true);
+        }
+      }));
+}
+
+int32_t HTMLEmbedElement::TabIndexDefault() {
+  // Only when we loaded a sub-document, <embed> should be tabbable by default
+  // because it's a navigable containers mentioned in 6.6.3 The tabindex
+  // attribute in the standard (see "If the value is null" section).
+  // https://html.spec.whatwg.org/#the-tabindex-attribute
+  // Otherwise, the default tab-index of <embed> is expected as -1 in a WPT:
+  // https://searchfox.org/mozilla-central/rev/7d98e651953f3135d91e98fa6d33efa131aec7ea/testing/web-platform/tests/html/interaction/focus/sequential-focus-navigation-and-the-tabindex-attribute/tabindex-getter.html#63
+  return Type() == ObjectType::Document ? 0 : -1;
+}
+
+bool HTMLEmbedElement::IsHTMLFocusable(bool aWithMouse, bool* aIsFocusable,
+                                       int32_t* aTabIndex) {
+  // Has non-plugin content: let the plugin decide what to do in terms of
+  // internal focus from mouse clicks
+  if (aTabIndex) {
+    *aTabIndex = TabIndex();
+  }
+
+  *aIsFocusable = true;
+
+  // Let the plugin decide, so override.
+  return true;
+}
+
+bool HTMLEmbedElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
+                                      const nsAString& aValue,
+                                      nsIPrincipal* aMaybeScriptedPrincipal,
+                                      nsAttrValue& aResult) {
+  if (aNamespaceID == kNameSpaceID_None) {
+    if (aAttribute == nsGkAtoms::align) {
+      return ParseAlignValue(aValue, aResult);
+    }
+    if (aAttribute == nsGkAtoms::width || aAttribute == nsGkAtoms::height ||
+        aAttribute == nsGkAtoms::hspace || aAttribute == nsGkAtoms::vspace) {
+      return aResult.ParseHTMLDimension(aValue);
+    }
+  }
+
+  return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
+                                              aMaybeScriptedPrincipal, aResult);
+}
+
+static void MapAttributesIntoRuleBase(MappedDeclarationsBuilder& aBuilder) {
+  nsGenericHTMLElement::MapImageMarginAttributeInto(aBuilder);
+  nsGenericHTMLElement::MapImageSizeAttributesInto(aBuilder);
+  nsGenericHTMLElement::MapImageAlignAttributeInto(aBuilder);
+}
+
+static void MapAttributesIntoRuleExceptHidden(
+    MappedDeclarationsBuilder& aBuilder) {
+  MapAttributesIntoRuleBase(aBuilder);
+  nsGenericHTMLElement::MapCommonAttributesIntoExceptHidden(aBuilder);
+}
+
+void HTMLEmbedElement::MapAttributesIntoRule(
+    MappedDeclarationsBuilder& aBuilder) {
+  MapAttributesIntoRuleBase(aBuilder);
+  nsGenericHTMLElement::MapCommonAttributesInto(aBuilder);
+}
+
+NS_IMETHODIMP_(bool)
+HTMLEmbedElement::IsAttributeMapped(const nsAtom* aAttribute) const {
+  static const MappedAttributeEntry* const map[] = {
+      sCommonAttributeMap,
+      sImageMarginSizeAttributeMap,
+      sImageBorderAttributeMap,
+      sImageAlignAttributeMap,
+  };
+
+  return FindAttributeDependence(aAttribute, map);
+}
+
+nsMapRuleToAttributesFunc HTMLEmbedElement::GetAttributeMappingFunction()
+    const {
+  return &MapAttributesIntoRuleExceptHidden;
+}
+
+void HTMLEmbedElement::StartObjectLoad(bool aNotify, bool aForceLoad) {
+  // BindToTree can call us asynchronously, and we may be removed from the tree
+  // in the interim
+  if (!IsInComposedDoc() || !OwnerDoc()->IsActive() ||
+      BlockEmbedOrObjectContentLoading()) {
+    return;
+  }
+
+  LoadObject(aNotify, aForceLoad);
+  SetIsNetworkCreated(false);
+}
+
+uint32_t HTMLEmbedElement::GetCapabilities() const {
+  return eAllowPluginSkipChannel | eSupportImages | eSupportDocuments;
+}
+
+void HTMLEmbedElement::DestroyContent() {
+  nsObjectLoadingContent::Destroy();
+  nsGenericHTMLElement::DestroyContent();
+}
+
+nsresult HTMLEmbedElement::CopyInnerTo(HTMLEmbedElement* aDest) {
+  nsresult rv = nsGenericHTMLElement::CopyInnerTo(aDest);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (aDest->OwnerDoc()->IsStaticDocument()) {
+    CreateStaticClone(aDest);
+  }
+
+  return rv;
+}
+
+JSObject* HTMLEmbedElement::WrapNode(JSContext* aCx,
+                                     JS::Handle<JSObject*> aGivenProto) {
+  return HTMLEmbedElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+nsContentPolicyType HTMLEmbedElement::GetContentPolicyType() const {
+  return nsIContentPolicy::TYPE_INTERNAL_EMBED;
+}
+
+}  // namespace mozilla::dom