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e74f1cd513
In order to facilitate the movement of code with side-effects called by Element::SetAttr to Element::BeforeSetAttr and Element::AfterSetAttr, Element::AfterSetAttr should have access to the old value of the attribute. This includes information about whether there was previously a value set or not. Accomplishing this involved passing an additional argument through functions that find and change the old attribute value in order to ensure that we can differentiate between an empty old value and an absent old value (attribute was not set). Note that while I tried to ensure that accurate values (and their absence) are reported to Element::AfterSetAttr, I largely ignored SVG. While the old value reported for SVG values should be however accurate the value already being reported to SetAttrAndNotify was, SVG elements do not currently report unset values properly because they will never pass a null pointer to SetAttrAndNotify. MozReview-Commit-ID: K1mha8CNFZP --HG-- extra : rebase_source : 42776eb01451d371e4aebcc17fe3dd112c8d268b
142 lines
5.1 KiB
C++
142 lines
5.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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nsresult SetAttr(int32_t aNameSpaceID, nsIAtom* aName,
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const nsAString& aValue, bool aNotify)
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{
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return SetAttr(aNameSpaceID, aName, nullptr, aValue, aNotify);
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}
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virtual nsresult SetAttr(int32_t aNameSpaceID, nsIAtom* aName,
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nsIAtom* aPrefix, const nsAString& aValue,
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bool aNotify) override;
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virtual nsresult UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttribute,
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bool aNotify) override;
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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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bool aNotify) override;
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virtual void DestroyContent() override;
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nsresult CopyInnerTo(mozilla::dom::Element* aDest, bool aPreallocateChildren);
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virtual int32_t TabIndexDefault() override;
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virtual nsIMozBrowserFrame* GetAsMozBrowserFrame() override { return this; }
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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 void InitStatics();
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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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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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#endif // nsGenericHTMLFrameElement_h
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