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https://github.com/roytam1/UXP.git
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Moonchild
824d0cad58
In order to tailor certain security checks to the caller that is attempting to load a particular piece of content, we need to be able to attach an appropriate triggering principal to the corresponding requests. Since most HTML content is loaded based on attribute values, this means capturing the subject principal of the caller who sets those attributes, which in turn means we need to make it available to `AfterSetAttr` hooks on all relevant element types.
262 lines
8.4 KiB
C++
262 lines
8.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_HTMLSharedObjectElement_h
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#define mozilla_dom_HTMLSharedObjectElement_h
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#include "mozilla/Attributes.h"
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#include "nsGenericHTMLElement.h"
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#include "nsObjectLoadingContent.h"
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#include "nsGkAtoms.h"
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#include "nsError.h"
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#include "nsIDOMHTMLAppletElement.h"
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#include "nsIDOMHTMLEmbedElement.h"
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namespace mozilla {
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namespace dom {
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class HTMLSharedObjectElement final : public nsGenericHTMLElement
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, public nsObjectLoadingContent
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, public nsIDOMHTMLAppletElement
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, public nsIDOMHTMLEmbedElement
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{
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public:
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explicit HTMLSharedObjectElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo,
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mozilla::dom::FromParser aFromParser = mozilla::dom::NOT_FROM_PARSER);
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// nsISupports
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NS_DECL_ISUPPORTS_INHERITED
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virtual int32_t TabIndexDefault() override;
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#ifdef XP_MACOSX
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// nsIDOMEventTarget
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NS_IMETHOD PostHandleEvent(EventChainPostVisitor& aVisitor) override;
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#endif
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// nsIDOMHTMLAppletElement
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NS_DECL_NSIDOMHTMLAPPLETELEMENT
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// Can't use macro for nsIDOMHTMLEmbedElement because it has conflicts with
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// NS_DECL_NSIDOMHTMLAPPLETELEMENT.
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// EventTarget
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virtual void AsyncEventRunning(AsyncEventDispatcher* aEvent) override;
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// nsIDOMHTMLEmbedElement
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NS_IMETHOD GetSrc(nsAString &aSrc) override;
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NS_IMETHOD SetSrc(const nsAString &aSrc) override;
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NS_IMETHOD GetType(nsAString &aType) override;
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NS_IMETHOD SetType(const nsAString &aType) override;
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virtual nsresult BindToTree(nsIDocument *aDocument, nsIContent *aParent,
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nsIContent *aBindingParent,
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bool aCompileEventHandlers) override;
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virtual void UnbindFromTree(bool aDeep = true,
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bool aNullParent = true) override;
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virtual bool IsHTMLFocusable(bool aWithMouse, bool *aIsFocusable, int32_t *aTabIndex) override;
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virtual IMEState GetDesiredIMEState() override;
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virtual void DoneAddingChildren(bool aHaveNotified) override;
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virtual bool IsDoneAddingChildren() override;
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virtual bool ParseAttribute(int32_t aNamespaceID,
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nsIAtom *aAttribute,
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const nsAString &aValue,
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nsAttrValue &aResult) override;
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virtual nsMapRuleToAttributesFunc GetAttributeMappingFunction() const override;
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NS_IMETHOD_(bool) IsAttributeMapped(const nsIAtom *aAttribute) const override;
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virtual EventStates IntrinsicState() const override;
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virtual void DestroyContent() override;
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// nsObjectLoadingContent
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virtual uint32_t GetCapabilities() const override;
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virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const override;
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nsresult CopyInnerTo(Element* aDest);
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void StartObjectLoad() { StartObjectLoad(true, false); }
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED_NO_UNLINK(HTMLSharedObjectElement,
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nsGenericHTMLElement)
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// WebIDL API for <applet>
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void GetAlign(DOMString& aValue)
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{
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GetHTMLAttr(nsGkAtoms::align, aValue);
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}
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void SetAlign(const nsAString& aValue, ErrorResult& aRv)
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{
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SetHTMLAttr(nsGkAtoms::align, aValue, aRv);
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}
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void GetAlt(DOMString& aValue)
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{
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GetHTMLAttr(nsGkAtoms::alt, aValue);
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}
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void SetAlt(const nsAString& aValue, ErrorResult& aRv)
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{
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SetHTMLAttr(nsGkAtoms::alt, aValue, aRv);
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}
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void GetArchive(DOMString& aValue)
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{
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GetHTMLAttr(nsGkAtoms::archive, aValue);
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}
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void SetArchive(const nsAString& aValue, ErrorResult& aRv)
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{
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SetHTMLAttr(nsGkAtoms::archive, aValue, aRv);
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}
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void GetCode(DOMString& aValue)
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{
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GetHTMLAttr(nsGkAtoms::code, aValue);
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}
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void SetCode(const nsAString& aValue, ErrorResult& aRv)
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{
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SetHTMLAttr(nsGkAtoms::code, aValue, aRv);
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}
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// XPCOM GetCodebase is ok; note that it's a URI attribute
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void SetCodeBase(const nsAString& aValue, ErrorResult& aRv)
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{
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SetHTMLAttr(nsGkAtoms::codebase, aValue, aRv);
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}
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void GetHeight(DOMString& aValue)
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{
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GetHTMLAttr(nsGkAtoms::height, aValue);
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}
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void SetHeight(const nsAString& aValue, ErrorResult& aRv)
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{
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SetHTMLAttr(nsGkAtoms::height, aValue, aRv);
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}
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uint32_t Hspace()
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{
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return GetUnsignedIntAttr(nsGkAtoms::hspace, 0);
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}
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void SetHspace(uint32_t aValue, ErrorResult& aRv)
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{
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SetUnsignedIntAttr(nsGkAtoms::hspace, aValue, 0, aRv);
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}
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void GetName(DOMString& aValue)
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{
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GetHTMLAttr(nsGkAtoms::name, aValue);
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}
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void SetName(const nsAString& aValue, ErrorResult& aRv)
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{
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SetHTMLAttr(nsGkAtoms::name, aValue, aRv);
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}
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// XPCOM GetObject is ok; note that it's a URI attribute with a weird base URI
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void SetObject(const nsAString& aValue, ErrorResult& aRv)
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{
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SetHTMLAttr(nsGkAtoms::object, aValue, aRv);
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}
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uint32_t Vspace()
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{
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return GetUnsignedIntAttr(nsGkAtoms::vspace, 0);
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}
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void SetVspace(uint32_t aValue, ErrorResult& aRv)
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{
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SetUnsignedIntAttr(nsGkAtoms::vspace, aValue, 0, aRv);
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}
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void GetWidth(DOMString& aValue)
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{
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GetHTMLAttr(nsGkAtoms::width, aValue);
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}
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void SetWidth(const nsAString& aValue, ErrorResult& aRv)
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{
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SetHTMLAttr(nsGkAtoms::width, aValue, aRv);
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}
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// WebIDL <embed> api
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// XPCOM GetSrc is ok; note that it's a URI attribute
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void SetSrc(const nsAString& aValue, ErrorResult& aRv)
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{
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SetHTMLAttr(nsGkAtoms::src, aValue, aRv);
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}
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void GetType(DOMString& aValue)
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{
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GetHTMLAttr(nsGkAtoms::type, aValue);
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}
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void SetType(const nsAString& aValue, ErrorResult& aRv)
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{
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SetHTMLAttr(nsGkAtoms::type, aValue, aRv);
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}
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// width covered by <applet>
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// height covered by <applet>
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// align covered by <applet>
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// name covered by <applet>
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nsIDocument*
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GetSVGDocument(nsIPrincipal& aSubjectPrincipal)
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{
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return GetContentDocument(aSubjectPrincipal);
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}
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/**
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* Calls LoadObject with the correct arguments to start the plugin load.
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*/
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void StartObjectLoad(bool aNotify, bool aForceLoad);
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protected:
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virtual nsresult AfterSetAttr(int32_t aNamespaceID, nsIAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue,
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nsIPrincipal* aSubjectPrincipal,
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bool aNotify) override;
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virtual nsresult OnAttrSetButNotChanged(int32_t aNamespaceID, nsIAtom* aName,
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const nsAttrValueOrString& aValue,
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bool aNotify) override;
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private:
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virtual ~HTMLSharedObjectElement();
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nsIAtom *URIAttrName() const
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{
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return mNodeInfo->Equals(nsGkAtoms::applet) ?
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nsGkAtoms::code :
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nsGkAtoms::src;
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}
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nsContentPolicyType GetContentPolicyType() const override;
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// mIsDoneAddingChildren is only really used for <applet>. This boolean is
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// always true for <embed>, per the documentation in nsIContent.h.
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bool mIsDoneAddingChildren;
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virtual JSObject* WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto) override;
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static void MapAttributesIntoRule(const nsMappedAttributes* aAttributes,
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nsRuleData* aData);
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/**
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* This function is called by AfterSetAttr and OnAttrSetButNotChanged.
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* It will not be called if the value is being unset.
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*
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* @param aNamespaceID the namespace of the attr being set
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* @param aName the localname of the attribute being set
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* @param aNotify Whether we plan to notify document observers.
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*/
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nsresult AfterMaybeChangeAttr(int32_t aNamespaceID, nsIAtom* aName,
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bool aNotify);
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/**
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* Decides whether we should load embed node content.
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*
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* If this is an embed node there are cases in which we should not try to load
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* the content:
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*
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* - If the embed node is the child of a media element
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* - If the embed node is the child of an object node that already has
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* content being loaded.
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*
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* In these cases, this function will return false, which will cause
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* us to skip calling LoadObject.
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*/
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bool BlockEmbedContentLoading();
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_HTMLSharedObjectElement_h
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