зеркало из https://github.com/mozilla/gecko-dev.git
384 строки
13 KiB
C++
384 строки
13 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Class for managing loading of a subframe (creation of the docshell,
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* handling of loads in it, recursion-checking).
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*/
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#ifndef nsFrameLoader_h_
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#define nsFrameLoader_h_
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#include "nsIDocShell.h"
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#include "nsStringFwd.h"
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#include "nsIFrameLoader.h"
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#include "nsPoint.h"
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#include "nsSize.h"
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#include "nsIURI.h"
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#include "nsAutoPtr.h"
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#include "nsFrameMessageManager.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/Attributes.h"
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#include "nsStubMutationObserver.h"
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#include "Units.h"
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#include "nsIWebBrowserPersistable.h"
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class nsIURI;
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class nsSubDocumentFrame;
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class nsView;
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class nsIInProcessContentFrameMessageManager;
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class AutoResetInShow;
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class AutoResetInFrameSwap;
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class nsITabParent;
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class nsIDocShellTreeItem;
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class nsIDocShellTreeOwner;
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class mozIApplication;
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namespace mozilla {
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namespace dom {
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class ContentParent;
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class PBrowserParent;
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class TabParent;
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class MutableTabContext;
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} // namespace dom
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namespace ipc {
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class StructuredCloneData;
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} // namespace ipc
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namespace layout {
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class RenderFrameParent;
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} // namespace layout
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} // namespace mozilla
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#if defined(MOZ_WIDGET_GTK)
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typedef struct _GtkWidget GtkWidget;
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#endif
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class nsFrameLoader final : public nsIFrameLoader,
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public nsIWebBrowserPersistable,
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public nsStubMutationObserver,
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public mozilla::dom::ipc::MessageManagerCallback
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{
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friend class AutoResetInShow;
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friend class AutoResetInFrameSwap;
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typedef mozilla::dom::PBrowserParent PBrowserParent;
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typedef mozilla::dom::TabParent TabParent;
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typedef mozilla::layout::RenderFrameParent RenderFrameParent;
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public:
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static nsFrameLoader* Create(mozilla::dom::Element* aOwner,
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bool aNetworkCreated);
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsFrameLoader, nsIFrameLoader)
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NS_DECL_NSIFRAMELOADER
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NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
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NS_DECL_NSIWEBBROWSERPERSISTABLE
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nsresult CheckForRecursiveLoad(nsIURI* aURI);
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nsresult ReallyStartLoading();
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void StartDestroy();
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void DestroyDocShell();
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void DestroyComplete();
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nsIDocShell* GetExistingDocShell() { return mDocShell; }
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mozilla::dom::EventTarget* GetTabChildGlobalAsEventTarget();
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nsresult CreateStaticClone(nsIFrameLoader* aDest);
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/**
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* MessageManagerCallback methods that we override.
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*/
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virtual bool DoLoadMessageManagerScript(const nsAString& aURL,
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bool aRunInGlobalScope) override;
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virtual nsresult DoSendAsyncMessage(JSContext* aCx,
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const nsAString& aMessage,
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mozilla::dom::ipc::StructuredCloneData& aData,
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JS::Handle<JSObject *> aCpows,
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nsIPrincipal* aPrincipal) override;
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virtual bool CheckPermission(const nsAString& aPermission) override;
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virtual bool CheckManifestURL(const nsAString& aManifestURL) override;
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virtual bool CheckAppHasPermission(const nsAString& aPermission) override;
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/**
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* Called from the layout frame associated with this frame loader;
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* this notifies us to hook up with the widget and view.
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*/
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bool Show(int32_t marginWidth, int32_t marginHeight,
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int32_t scrollbarPrefX, int32_t scrollbarPrefY,
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nsSubDocumentFrame* frame);
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/**
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* Called when the margin properties of the containing frame are changed.
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*/
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void MarginsChanged(uint32_t aMarginWidth, uint32_t aMarginHeight);
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/**
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* Called from the layout frame associated with this frame loader, when
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* the frame is being torn down; this notifies us that out widget and view
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* are going away and we should unhook from them.
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*/
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void Hide();
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nsresult CloneForStatic(nsIFrameLoader* aOriginal);
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// The guts of an nsIFrameLoaderOwner::SwapFrameLoader implementation. A
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// frame loader owner needs to call this, and pass in the two references to
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// nsRefPtrs for frame loaders that need to be swapped.
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nsresult SwapWithOtherLoader(nsFrameLoader* aOther,
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RefPtr<nsFrameLoader>& aFirstToSwap,
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RefPtr<nsFrameLoader>& aSecondToSwap);
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nsresult SwapWithOtherRemoteLoader(nsFrameLoader* aOther,
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RefPtr<nsFrameLoader>& aFirstToSwap,
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RefPtr<nsFrameLoader>& aSecondToSwap);
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/**
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* Return the primary frame for our owning content, or null if it
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* can't be found.
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*/
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nsIFrame* GetPrimaryFrameOfOwningContent() const
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{
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return mOwnerContent ? mOwnerContent->GetPrimaryFrame() : nullptr;
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}
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/**
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* Return the document that owns this, or null if we don't have
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* an owner.
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*/
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nsIDocument* GetOwnerDoc() const
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{ return mOwnerContent ? mOwnerContent->OwnerDoc() : nullptr; }
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PBrowserParent* GetRemoteBrowser() const;
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/**
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* The "current" render frame is the one on which the most recent
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* remote layer-tree transaction was executed. If no content has
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* been drawn yet, or the remote browser doesn't have any drawn
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* content for whatever reason, return nullptr. The returned render
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* frame has an associated shadow layer tree.
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*
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* Note that the returned render frame might not be a frame
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* constructed for this->GetURL(). This can happen, e.g., if the
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* <browser> was just navigated to a new URL, but hasn't painted the
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* new page yet. A render frame for the previous page may be
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* returned. (In-process <browser> behaves similarly, and this
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* behavior seems desirable.)
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*/
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RenderFrameParent* GetCurrentRenderFrame() const;
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nsFrameMessageManager* GetFrameMessageManager() { return mMessageManager; }
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mozilla::dom::Element* GetOwnerContent() { return mOwnerContent; }
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bool ShouldClipSubdocument() { return mClipSubdocument; }
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bool ShouldClampScrollPosition() { return mClampScrollPosition; }
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/**
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* Tell this FrameLoader to use a particular remote browser.
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*
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* This will assert if mRemoteBrowser is non-null. In practice,
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* this means you can't have successfully run TryRemoteBrowser() on
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* this object, which means you can't have called ShowRemoteFrame()
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* or ReallyStartLoading().
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*/
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void SetRemoteBrowser(nsITabParent* aTabParent);
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nsresult SwapRemoteBrowser(nsITabParent* aTabParent);
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/**
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* Stashes a detached view on the frame loader. We do this when we're
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* destroying the nsSubDocumentFrame. If the nsSubdocumentFrame is
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* being reframed we'll restore the detached view when it's recreated,
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* otherwise we'll discard the old presentation and set the detached
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* subdoc view to null. aContainerDoc is the document containing the
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* the subdoc frame. This enables us to detect when the containing
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* document has changed during reframe, so we can discard the presentation
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* in that case.
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*/
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void SetDetachedSubdocView(nsView* aDetachedView,
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nsIDocument* aContainerDoc);
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/**
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* Retrieves the detached view and the document containing the view,
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* as set by SetDetachedSubdocView().
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*/
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nsView* GetDetachedSubdocView(nsIDocument** aContainerDoc) const;
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/**
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* Applies a new set of sandbox flags. These are merged with the sandbox
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* flags from our owning content's owning document with a logical OR, this
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* ensures that we can only add restrictions and never remove them.
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*/
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void ApplySandboxFlags(uint32_t sandboxFlags);
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void GetURL(nsString& aURL);
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void ActivateUpdateHitRegion();
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void DeactivateUpdateHitRegion();
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// Properly retrieves documentSize of any subdocument type.
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nsresult GetWindowDimensions(nsIntRect& aRect);
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// public because a callback needs these.
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RefPtr<nsFrameMessageManager> mMessageManager;
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nsCOMPtr<nsIInProcessContentFrameMessageManager> mChildMessageManager;
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private:
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nsFrameLoader(mozilla::dom::Element* aOwner, bool aNetworkCreated);
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~nsFrameLoader();
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void SetOwnerContent(mozilla::dom::Element* aContent);
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bool ShouldUseRemoteProcess();
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/**
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* Return true if the frame is a remote frame. Return false otherwise
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*/
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bool IsRemoteFrame();
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/**
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* Is this a frameloader for a bona fide <iframe mozbrowser> or
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* <iframe mozapp>? (I.e., does the frame return true for
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* nsIMozBrowserFrame::GetReallyIsBrowserOrApp()?)
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*/
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bool OwnerIsBrowserOrAppFrame();
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/**
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* Is this a frameloader for a bona fide <iframe mozwidget>? (I.e., does the
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* frame return true for nsIMozBrowserFrame::GetReallyIsWidget()?)
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*/
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bool OwnerIsWidget();
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/**
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* Is this a frameloader for a bona fide <iframe mozapp>? (I.e., does the
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* frame return true for nsIMozBrowserFrame::GetReallyIsApp()?)
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*/
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bool OwnerIsAppFrame();
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/**
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* Is this a frame loader for a bona fide <iframe mozbrowser>?
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*/
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bool OwnerIsBrowserFrame();
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/**
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* Get our owning element's app manifest URL, or return the empty string if
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* our owning element doesn't have an app manifest URL.
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*/
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void GetOwnerAppManifestURL(nsAString& aOut);
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/**
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* Get the app for our frame. This is the app whose manifest is returned by
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* GetOwnerAppManifestURL.
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*/
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already_AddRefed<mozIApplication> GetOwnApp();
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/**
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* Get the app which contains this frame. This is the app associated with
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* the frame element's principal.
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*/
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already_AddRefed<mozIApplication> GetContainingApp();
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/**
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* If we are an IPC frame, set mRemoteFrame. Otherwise, create and
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* initialize mDocShell.
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*/
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nsresult MaybeCreateDocShell();
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nsresult EnsureMessageManager();
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nsresult ReallyLoadFrameScripts();
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// Updates the subdocument position and size. This gets called only
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// when we have our own in-process DocShell.
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void UpdateBaseWindowPositionAndSize(nsSubDocumentFrame *aIFrame);
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nsresult CheckURILoad(nsIURI* aURI);
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void FireErrorEvent();
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nsresult ReallyStartLoadingInternal();
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// Return true if remote browser created; nothing else to do
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bool TryRemoteBrowser();
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// Tell the remote browser that it's now "virtually visible"
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bool ShowRemoteFrame(const mozilla::ScreenIntSize& size,
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nsSubDocumentFrame *aFrame = nullptr);
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bool AddTreeItemToTreeOwner(nsIDocShellTreeItem* aItem,
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nsIDocShellTreeOwner* aOwner,
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int32_t aParentType,
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nsIDocShell* aParentNode);
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nsIAtom* TypeAttrName() const {
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return mOwnerContent->IsXULElement()
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? nsGkAtoms::type : nsGkAtoms::mozframetype;
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}
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// Update the permission manager's app-id refcount based on mOwnerContent's
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// own-or-containing-app.
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void ResetPermissionManagerStatus();
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void InitializeBrowserAPI();
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nsresult GetNewTabContext(mozilla::dom::MutableTabContext* aTabContext);
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enum TabParentChange {
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eTabParentRemoved,
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eTabParentChanged
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};
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void MaybeUpdatePrimaryTabParent(TabParentChange aChange);
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nsCOMPtr<nsIDocShell> mDocShell;
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nsCOMPtr<nsIURI> mURIToLoad;
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mozilla::dom::Element* mOwnerContent; // WEAK
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// After the frameloader has been removed from the DOM but before all of the
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// messages from the frame have been received, we keep a strong reference to
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// our <browser> element.
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RefPtr<mozilla::dom::Element> mOwnerContentStrong;
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// Note: this variable must be modified only by ResetPermissionManagerStatus()
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uint32_t mAppIdSentToPermissionManager;
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// Stores the root view of the subdocument while the subdocument is being
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// reframed. Used to restore the presentation after reframing.
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nsView* mDetachedSubdocViews;
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// Stores the containing document of the frame corresponding to this
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// frame loader. This is reference is kept valid while the subframe's
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// presentation is detached and stored in mDetachedSubdocViews. This
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// enables us to detect whether the frame has moved documents during
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// a reframe, so that we know not to restore the presentation.
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nsCOMPtr<nsIDocument> mContainerDocWhileDetached;
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TabParent* mRemoteBrowser;
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uint64_t mChildID;
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// See nsIFrameLoader.idl. EVENT_MODE_NORMAL_DISPATCH automatically
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// forwards some input events to out-of-process content.
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uint32_t mEventMode;
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bool mIsPrerendered : 1;
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bool mDepthTooGreat : 1;
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bool mIsTopLevelContent : 1;
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bool mDestroyCalled : 1;
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bool mNeedsAsyncDestroy : 1;
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bool mInSwap : 1;
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bool mInShow : 1;
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bool mHideCalled : 1;
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// True when the object is created for an element which the parser has
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// created using NS_FROM_PARSER_NETWORK flag. If the element is modified,
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// it may lose the flag.
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bool mNetworkCreated : 1;
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bool mRemoteBrowserShown : 1;
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bool mRemoteFrame : 1;
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bool mClipSubdocument : 1;
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bool mClampScrollPosition : 1;
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bool mObservingOwnerContent : 1;
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// Backs nsIFrameLoader::{Get,Set}Visible. Visibility state here relates to
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// whether this frameloader's <iframe mozbrowser> is setVisible(true)'ed, and
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// doesn't necessarily correlate with docshell/document visibility.
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bool mVisible : 1;
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};
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#endif
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