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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.
146 lines
5.3 KiB
C++
146 lines
5.3 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsGenericHTMLFrameElement_h
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#define nsGenericHTMLFrameElement_h
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#include "mozilla/Attributes.h"
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#include "mozilla/ErrorResult.h"
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#include "mozilla/dom/nsBrowserElement.h"
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#include "nsFrameLoader.h"
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#include "nsGenericHTMLElement.h"
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#include "nsIDOMEventListener.h"
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#include "nsIFrameLoader.h"
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#include "nsIMozBrowserFrame.h"
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class nsXULElement;
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/**
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* A helper class for frame elements
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*/
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class nsGenericHTMLFrameElement : public nsGenericHTMLElement,
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public nsIFrameLoaderOwner,
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public mozilla::nsBrowserElement,
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public nsIMozBrowserFrame
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{
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public:
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nsGenericHTMLFrameElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo,
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mozilla::dom::FromParser aFromParser)
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: nsGenericHTMLElement(aNodeInfo)
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, nsBrowserElement()
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, mNetworkCreated(aFromParser == mozilla::dom::FROM_PARSER_NETWORK)
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, mIsPrerendered(false)
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, mBrowserFrameListenersRegistered(false)
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, mFrameLoaderCreationDisallowed(false)
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, mReallyIsBrowser(false)
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{
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}
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_NSIFRAMELOADEROWNER
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NS_DECL_NSIDOMMOZBROWSERFRAME
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NS_DECL_NSIMOZBROWSERFRAME
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// nsIContent
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virtual bool IsHTMLFocusable(bool aWithMouse, bool *aIsFocusable, int32_t *aTabIndex) 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 void DestroyContent() override;
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nsresult CopyInnerTo(mozilla::dom::Element* aDest);
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virtual int32_t TabIndexDefault() override;
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsGenericHTMLFrameElement,
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nsGenericHTMLElement)
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void SwapFrameLoaders(mozilla::dom::HTMLIFrameElement& aOtherLoaderOwner,
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mozilla::ErrorResult& aError);
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void SwapFrameLoaders(nsXULElement& aOtherLoaderOwner,
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mozilla::ErrorResult& aError);
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void SwapFrameLoaders(nsIFrameLoaderOwner* aOtherLoaderOwner,
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mozilla::ErrorResult& rv);
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void PresetOpenerWindow(mozIDOMWindowProxy* aOpenerWindow,
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mozilla::ErrorResult& aRv);
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static bool BrowserFramesEnabled();
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/**
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* Helper method to map a HTML 'scrolling' attribute value to a nsIScrollable
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* enum value. scrolling="no" (and its synonyms) maps to
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* nsIScrollable::Scrollbar_Never, and anything else (including nullptr) maps
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* to nsIScrollable::Scrollbar_Auto.
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* @param aValue the attribute value to map or nullptr
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* @return nsIScrollable::Scrollbar_Never or nsIScrollable::Scrollbar_Auto
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*/
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static int32_t MapScrollingAttribute(const nsAttrValue* aValue);
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protected:
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virtual ~nsGenericHTMLFrameElement();
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// This doesn't really ensure a frame loader in all cases, only when
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// it makes sense.
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void EnsureFrameLoader();
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nsresult LoadSrc();
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nsIDocument* GetContentDocument(nsIPrincipal& aSubjectPrincipal);
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nsresult GetContentDocument(nsIDOMDocument** aContentDocument);
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already_AddRefed<nsPIDOMWindowOuter> GetContentWindow();
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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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RefPtr<nsFrameLoader> mFrameLoader;
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nsCOMPtr<nsPIDOMWindowOuter> mOpenerWindow;
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/**
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* True when the element is created by the parser using the
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* NS_FROM_PARSER_NETWORK flag.
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* If the element is modified, it may lose the flag.
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*/
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bool mNetworkCreated;
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bool mIsPrerendered;
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bool mBrowserFrameListenersRegistered;
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bool mFrameLoaderCreationDisallowed;
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bool mReallyIsBrowser;
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// This flag is only used by <iframe>. See HTMLIFrameElement::
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// FullscreenFlag() for details. It is placed here so that we
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// do not bloat any struct.
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bool mFullscreenFlag = false;
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private:
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void GetManifestURL(nsAString& aOut);
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/**
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* This function is called by AfterSetAttr and OnAttrSetButNotChanged.
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* It will be called whether the value is being set or 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 aValue the value being set or null if the value is being unset
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* @param aNotify Whether we plan to notify document observers.
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*/
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void AfterMaybeChangeAttr(int32_t aNamespaceID, nsIAtom* aName,
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const nsAttrValueOrString* aValue, bool aNotify);
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};
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#endif // nsGenericHTMLFrameElement_h
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