зеркало из https://github.com/mozilla/gecko-dev.git
121 строка
4.2 KiB
C++
121 строка
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; 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 PreloadService_h__
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#define PreloadService_h__
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#include "nsIContentPolicy.h"
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#include "nsIURI.h"
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#include "nsRefPtrHashtable.h"
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#include "mozilla/PreloadHashKey.h"
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class nsINode;
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namespace mozilla {
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class PreloaderBase;
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namespace dom {
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class HTMLLinkElement;
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class Document;
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enum class ReferrerPolicy : uint8_t;
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} // namespace dom
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/**
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* Intended to scope preloads and speculative loads under one roof. This class
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* is intended to be a member of dom::Document. Provides registration of
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* speculative loads via a `key` which is defined to consist of the URL,
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* resource type, and resource-specific attributes that are further
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* distinguishing loads with otherwise same type and url.
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*/
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class PreloadService {
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public:
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explicit PreloadService(dom::Document*);
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~PreloadService();
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// Called by resource loaders to register a running resource load. This is
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// called for a speculative load when it's started the first time, being it
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// either regular speculative load or a preload.
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//
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// Returns false and does nothing if a preload is already registered under
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// this key, true otherwise.
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bool RegisterPreload(const PreloadHashKey& aKey, PreloaderBase* aPreload);
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// Called when the load is about to be cancelled. Exact behavior is to be
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// determined yet.
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void DeregisterPreload(const PreloadHashKey& aKey);
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// Called when the scope is to go away.
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void ClearAllPreloads();
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// True when there is a preload registered under the key.
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bool PreloadExists(const PreloadHashKey& aKey);
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// Returns an existing preload under the key or null, when there is none
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// registered under the key.
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already_AddRefed<PreloaderBase> LookupPreload(
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const PreloadHashKey& aKey) const;
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void SetSpeculationBase(nsIURI* aURI) { mSpeculationBaseURI = aURI; }
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already_AddRefed<nsIURI> GetPreloadURI(const nsAString& aURL);
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already_AddRefed<PreloaderBase> PreloadLinkElement(
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dom::HTMLLinkElement* aLink, nsContentPolicyType aPolicyType);
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void PreloadLinkHeader(nsIURI* aURI, const nsAString& aURL,
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nsContentPolicyType aPolicyType, const nsAString& aAs,
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const nsAString& aType, const nsAString& aIntegrity,
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const nsAString& aSrcset, const nsAString& aSizes,
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const nsAString& aCORS,
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const nsAString& aReferrerPolicy);
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void PreloadScript(nsIURI* aURI, const nsAString& aType,
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const nsAString& aCharset, const nsAString& aCrossOrigin,
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const nsAString& aReferrerPolicy,
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const nsAString& aIntegrity, bool aScriptFromHead);
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void PreloadImage(nsIURI* aURI, const nsAString& aCrossOrigin,
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const nsAString& aImageReferrerPolicy, bool aIsImgSet);
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void PreloadFont(nsIURI* aURI, const nsAString& aCrossOrigin,
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const nsAString& aReferrerPolicy);
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void PreloadFetch(nsIURI* aURI, const nsAString& aCrossOrigin,
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const nsAString& aReferrerPolicy);
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static void NotifyNodeEvent(nsINode* aNode, bool aSuccess);
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private:
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dom::ReferrerPolicy PreloadReferrerPolicy(const nsAString& aReferrerPolicy);
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nsIURI* BaseURIForPreload();
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struct PreloadOrCoalesceResult {
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RefPtr<PreloaderBase> mPreloader;
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bool mAlreadyComplete;
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};
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PreloadOrCoalesceResult PreloadOrCoalesce(
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nsIURI* aURI, const nsAString& aURL, nsContentPolicyType aPolicyType,
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const nsAString& aAs, const nsAString& aType, const nsAString& aCharset,
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const nsAString& aSrcset, const nsAString& aSizes,
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const nsAString& aIntegrity, const nsAString& aCORS,
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const nsAString& aReferrerPolicy, bool aFromHeader);
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private:
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nsRefPtrHashtable<PreloadHashKey, PreloaderBase> mPreloads;
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// Raw pointer only, we are intended to be a direct member of dom::Document
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dom::Document* mDocument;
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// Set by `nsHtml5TreeOpExecutor::SetSpeculationBase`.
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nsCOMPtr<nsIURI> mSpeculationBaseURI;
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};
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} // namespace mozilla
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#endif
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