зеркало из https://github.com/mozilla/gecko-dev.git
2285 строки
78 KiB
C++
2285 строки
78 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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/* loading of CSS style sheets using the network APIs */
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#include "mozilla/css/Loader.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/dom/DocGroup.h"
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#include "mozilla/dom/SRILogHelper.h"
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#include "mozilla/IntegerPrintfMacros.h"
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#include "mozilla/AutoRestore.h"
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#include "mozilla/LoadInfo.h"
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#include "mozilla/Logging.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/PreloadHashKey.h"
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#include "mozilla/ResultExtensions.h"
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#include "mozilla/SchedulerGroup.h"
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#include "mozilla/URLPreloader.h"
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#include "nsIRunnable.h"
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#include "nsISupportsPriority.h"
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#include "nsITimedChannel.h"
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#include "nsICachingChannel.h"
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#include "nsSyncLoadService.h"
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#include "nsCOMPtr.h"
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#include "nsString.h"
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#include "nsIContent.h"
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#include "nsIContentInlines.h"
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#include "nsICookieJarSettings.h"
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#include "mozilla/dom/Document.h"
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#include "nsIURI.h"
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#include "nsNetUtil.h"
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#include "nsContentUtils.h"
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#include "nsIScriptSecurityManager.h"
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#include "nsContentPolicyUtils.h"
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#include "nsIHttpChannel.h"
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#include "nsIHttpChannelInternal.h"
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#include "nsIClassOfService.h"
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#include "nsIScriptError.h"
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#include "nsMimeTypes.h"
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#include "nsICSSLoaderObserver.h"
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#include "nsThreadUtils.h"
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#include "nsGkAtoms.h"
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#include "nsIThreadInternal.h"
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#include "nsINetworkPredictor.h"
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#include "nsStringStream.h"
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#include "mozilla/dom/MediaList.h"
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#include "mozilla/dom/ShadowRoot.h"
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#include "mozilla/dom/URL.h"
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#include "mozilla/net/UrlClassifierFeatureFactory.h"
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#include "mozilla/AsyncEventDispatcher.h"
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#include "mozilla/ServoBindings.h"
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#include "mozilla/StyleSheet.h"
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#include "mozilla/StyleSheetInlines.h"
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#include "mozilla/ConsoleReportCollector.h"
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#include "mozilla/ServoUtils.h"
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#include "mozilla/css/StreamLoader.h"
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#include "mozilla/SharedStyleSheetCache.h"
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#include "mozilla/StaticPrefs_dom.h"
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#include "ReferrerInfo.h"
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#ifdef MOZ_XUL
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# include "nsXULPrototypeCache.h"
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#endif
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#include "nsError.h"
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#include "mozilla/dom/SRICheck.h"
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#include "mozilla/Encoding.h"
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using namespace mozilla::dom;
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// 1024 bytes is specified in https://drafts.csswg.org/css-syntax/
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#define SNIFFING_BUFFER_SIZE 1024
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/**
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* OVERALL ARCHITECTURE
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*
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* The CSS Loader gets requests to load various sorts of style sheets:
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* inline style from <style> elements, linked style, @import-ed child
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* sheets, non-document sheets. The loader handles the following tasks:
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* 1) Creation of the actual style sheet objects: CreateSheet()
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* 2) setting of the right media, title, enabled state, etc on the
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* sheet: PrepareSheet()
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* 3) Insertion of the sheet in the proper cascade order:
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* InsertSheetInTree() and InsertChildSheet()
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* 4) Load of the sheet: LoadSheet() including security checks
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* 5) Parsing of the sheet: ParseSheet()
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* 6) Cleanup: SheetComplete()
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*
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* The detailed documentation for these functions is found with the
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* function implementations.
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*
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* The following helper object is used:
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* SheetLoadData -- a small class that is used to store all the
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* information needed for the loading of a sheet;
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* this class handles listening for the stream
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* loader completion and also handles charset
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* determination.
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*/
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extern mozilla::LazyLogModule sCssLoaderLog;
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mozilla::LazyLogModule sCssLoaderLog("nsCSSLoader");
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static mozilla::LazyLogModule gSriPRLog("SRI");
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#define LOG_ERROR(args) MOZ_LOG(sCssLoaderLog, mozilla::LogLevel::Error, args)
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#define LOG_WARN(args) MOZ_LOG(sCssLoaderLog, mozilla::LogLevel::Warning, args)
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#define LOG_DEBUG(args) MOZ_LOG(sCssLoaderLog, mozilla::LogLevel::Debug, args)
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#define LOG(args) LOG_DEBUG(args)
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#define LOG_ERROR_ENABLED() \
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MOZ_LOG_TEST(sCssLoaderLog, mozilla::LogLevel::Error)
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#define LOG_WARN_ENABLED() \
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MOZ_LOG_TEST(sCssLoaderLog, mozilla::LogLevel::Warning)
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#define LOG_DEBUG_ENABLED() \
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MOZ_LOG_TEST(sCssLoaderLog, mozilla::LogLevel::Debug)
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#define LOG_ENABLED() LOG_DEBUG_ENABLED()
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#define LOG_URI(format, uri) \
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PR_BEGIN_MACRO \
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NS_ASSERTION(uri, "Logging null uri"); \
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if (LOG_ENABLED()) { \
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LOG((format, uri->GetSpecOrDefault().get())); \
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} \
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PR_END_MACRO
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// And some convenience strings...
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static const char* const gStateStrings[] = {"NeedsParser", "Pending", "Loading",
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"Complete"};
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namespace mozilla {
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SheetLoadDataHashKey::SheetLoadDataHashKey(const css::SheetLoadData& aLoadData)
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: mURI(aLoadData.mURI),
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mPrincipal(aLoadData.mTriggeringPrincipal),
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mLoaderPrincipal(aLoadData.mLoader->LoaderPrincipal()),
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mPartitionPrincipal(aLoadData.mLoader->PartitionedPrincipal()),
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mEncodingGuess(aLoadData.mGuessedEncoding),
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mCORSMode(aLoadData.mSheet->GetCORSMode()),
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mParsingMode(aLoadData.mSheet->ParsingMode()),
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mCompatMode(aLoadData.mCompatMode),
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mIsLinkPreload(aLoadData.IsLinkPreload()) {
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MOZ_COUNT_CTOR(SheetLoadDataHashKey);
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MOZ_ASSERT(mURI);
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MOZ_ASSERT(mPrincipal);
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MOZ_ASSERT(mLoaderPrincipal);
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MOZ_ASSERT(mPartitionPrincipal);
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aLoadData.mSheet->GetIntegrity(mSRIMetadata);
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}
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bool SheetLoadDataHashKey::KeyEquals(const SheetLoadDataHashKey& aKey) const {
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{
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bool eq;
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if (NS_FAILED(mURI->Equals(aKey.mURI, &eq)) || !eq) {
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return false;
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}
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}
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LOG_URI("KeyEquals(%s)\n", mURI);
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if (!mPrincipal->Equals(aKey.mPrincipal)) {
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LOG((" > Principal mismatch\n"));
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return false;
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}
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// We only check for partition principal equality if any of the loads are
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// triggered by a document rather than e.g. an extension (which have different
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// origins than the loader principal).
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if (mPrincipal->Equals(mLoaderPrincipal) ||
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aKey.mPrincipal->Equals(aKey.mLoaderPrincipal)) {
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if (!mPartitionPrincipal->Equals(aKey.mPartitionPrincipal)) {
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LOG((" > Partition principal mismatch\n"));
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return false;
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}
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}
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if (mCORSMode != aKey.mCORSMode) {
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LOG((" > CORS mismatch\n"));
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return false;
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}
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if (mParsingMode != aKey.mParsingMode) {
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LOG((" > Parsing mode mismatch\n"));
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return false;
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}
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if (mCompatMode != aKey.mCompatMode) {
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LOG((" > Quirks mismatch\n"));
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return false;
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}
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// If encoding differs, then don't reuse the cache.
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//
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// TODO(emilio): When the encoding is determined from the request (either
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// BOM or Content-Length or @charset), we could do a bit better,
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// theoretically.
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if (mEncodingGuess != aKey.mEncodingGuess) {
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LOG((" > Encoding guess mismatch\n"));
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return false;
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}
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// Consuming stylesheet tags must never coalesce to <link preload> initiated
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// speculative loads with a weaker SRI hash or its different value. This
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// check makes sure that regular loads will never find such a weaker preload
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// and rather start a new, independent load with new, stronger SRI checker
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// set up, so that integrity is ensured.
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if (mIsLinkPreload != aKey.mIsLinkPreload) {
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const auto& linkPreloadMetadata =
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mIsLinkPreload ? mSRIMetadata : aKey.mSRIMetadata;
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const auto& consumerPreloadMetadata =
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mIsLinkPreload ? aKey.mSRIMetadata : mSRIMetadata;
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if (!consumerPreloadMetadata.CanTrustBeDelegatedTo(linkPreloadMetadata)) {
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LOG((" > Preload SRI metadata mismatch\n"));
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return false;
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}
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}
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return true;
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}
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namespace css {
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static NotNull<const Encoding*> GetFallbackEncoding(
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Loader& aLoader, nsINode* aOwningNode,
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const Encoding* aPreloadOrParentDataEncoding) {
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const Encoding* encoding;
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// Now try the charset on the <link> or processing instruction
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// that loaded us
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if (aOwningNode) {
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nsAutoString label16;
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LinkStyle::FromNode(*aOwningNode)->GetCharset(label16);
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encoding = Encoding::ForLabel(label16);
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if (encoding) {
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return WrapNotNull(encoding);
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}
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}
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// Try preload or parent sheet encoding.
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if (aPreloadOrParentDataEncoding) {
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return WrapNotNull(aPreloadOrParentDataEncoding);
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}
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if (auto* doc = aLoader.GetDocument()) {
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// Use the document charset.
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return doc->GetDocumentCharacterSet();
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}
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return UTF_8_ENCODING;
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}
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/********************************
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* SheetLoadData implementation *
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********************************/
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NS_IMPL_ISUPPORTS(SheetLoadData, nsIRunnable, nsIThreadObserver)
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SheetLoadData::SheetLoadData(Loader* aLoader, const nsAString& aTitle,
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nsIURI* aURI, StyleSheet* aSheet, bool aSyncLoad,
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nsINode* aOwningNode, IsAlternate aIsAlternate,
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MediaMatched aMediaMatches, IsPreload aIsPreload,
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nsICSSLoaderObserver* aObserver,
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nsIPrincipal* aTriggeringPrincipal,
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nsIReferrerInfo* aReferrerInfo,
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nsINode* aRequestingNode)
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: mLoader(aLoader),
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mTitle(aTitle),
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mEncoding(nullptr),
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mURI(aURI),
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mLineNumber(1),
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mSheet(aSheet),
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mNext(nullptr),
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mPendingChildren(0),
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mSyncLoad(aSyncLoad),
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mIsNonDocumentSheet(false),
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mIsChildSheet(aSheet->GetParentSheet()),
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mIsLoading(false),
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mIsBeingParsed(false),
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mIsCancelled(false),
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mMustNotify(false),
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mWasAlternate(aIsAlternate == IsAlternate::Yes),
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mMediaMatched(aMediaMatches == MediaMatched::Yes),
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mUseSystemPrincipal(false),
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mSheetAlreadyComplete(false),
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mIsCrossOriginNoCORS(false),
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mBlockResourceTiming(false),
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mLoadFailed(false),
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mIsPreload(aIsPreload),
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mOwningNode(aOwningNode),
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mObserver(aObserver),
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mTriggeringPrincipal(aTriggeringPrincipal),
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mReferrerInfo(aReferrerInfo),
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mRequestingNode(aRequestingNode),
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mGuessedEncoding(GetFallbackEncoding(*aLoader, aOwningNode, nullptr)),
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mCompatMode(aLoader->mCompatMode) {
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MOZ_ASSERT(!mOwningNode || dom::LinkStyle::FromNode(*mOwningNode),
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"Must implement LinkStyle");
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MOZ_ASSERT(mTriggeringPrincipal);
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MOZ_ASSERT(mLoader, "Must have a loader!");
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}
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SheetLoadData::SheetLoadData(Loader* aLoader, nsIURI* aURI, StyleSheet* aSheet,
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SheetLoadData* aParentData,
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nsICSSLoaderObserver* aObserver,
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nsIPrincipal* aTriggeringPrincipal,
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nsIReferrerInfo* aReferrerInfo,
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nsINode* aRequestingNode)
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: mLoader(aLoader),
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mEncoding(nullptr),
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mURI(aURI),
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mLineNumber(1),
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mSheet(aSheet),
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mNext(nullptr),
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mParentData(aParentData),
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mPendingChildren(0),
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mSyncLoad(aParentData && aParentData->mSyncLoad),
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mIsNonDocumentSheet(aParentData && aParentData->mIsNonDocumentSheet),
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mIsChildSheet(aSheet->GetParentSheet()),
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mIsLoading(false),
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mIsBeingParsed(false),
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mIsCancelled(false),
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mMustNotify(false),
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mWasAlternate(false),
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mMediaMatched(true),
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mUseSystemPrincipal(aParentData && aParentData->mUseSystemPrincipal),
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mSheetAlreadyComplete(false),
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mIsCrossOriginNoCORS(false),
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mBlockResourceTiming(false),
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mLoadFailed(false),
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mIsPreload(IsPreload::No),
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mOwningNode(nullptr),
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mObserver(aObserver),
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mTriggeringPrincipal(aTriggeringPrincipal),
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mReferrerInfo(aReferrerInfo),
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mRequestingNode(aRequestingNode),
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mGuessedEncoding(GetFallbackEncoding(
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*aLoader, nullptr, aParentData ? aParentData->mEncoding : nullptr)),
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mCompatMode(aLoader->mCompatMode) {
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MOZ_ASSERT(mLoader, "Must have a loader!");
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MOZ_ASSERT(mTriggeringPrincipal);
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MOZ_ASSERT(!mUseSystemPrincipal || mSyncLoad,
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"Shouldn't use system principal for async loads");
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MOZ_ASSERT_IF(aParentData, mIsChildSheet);
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}
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SheetLoadData::SheetLoadData(
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Loader* aLoader, nsIURI* aURI, StyleSheet* aSheet, bool aSyncLoad,
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UseSystemPrincipal aUseSystemPrincipal, IsPreload aIsPreload,
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const Encoding* aPreloadEncoding, nsICSSLoaderObserver* aObserver,
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nsIPrincipal* aTriggeringPrincipal, nsIReferrerInfo* aReferrerInfo,
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nsINode* aRequestingNode)
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: mLoader(aLoader),
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mEncoding(nullptr),
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mURI(aURI),
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mLineNumber(1),
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mSheet(aSheet),
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mNext(nullptr),
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mPendingChildren(0),
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mSyncLoad(aSyncLoad),
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mIsNonDocumentSheet(true),
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mIsChildSheet(false),
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mIsLoading(false),
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mIsBeingParsed(false),
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mIsCancelled(false),
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mMustNotify(false),
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mWasAlternate(false),
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mMediaMatched(true),
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mUseSystemPrincipal(aUseSystemPrincipal == UseSystemPrincipal::Yes),
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mSheetAlreadyComplete(false),
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mIsCrossOriginNoCORS(false),
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mBlockResourceTiming(false),
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mLoadFailed(false),
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mIsPreload(aIsPreload),
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mOwningNode(nullptr),
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mObserver(aObserver),
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mTriggeringPrincipal(aTriggeringPrincipal),
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mReferrerInfo(aReferrerInfo),
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mRequestingNode(aRequestingNode),
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mGuessedEncoding(
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GetFallbackEncoding(*aLoader, nullptr, aPreloadEncoding)),
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mCompatMode(aLoader->mCompatMode) {
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MOZ_ASSERT(mTriggeringPrincipal);
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MOZ_ASSERT(mLoader, "Must have a loader!");
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MOZ_ASSERT(!mUseSystemPrincipal || mSyncLoad,
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"Shouldn't use system principal for async loads");
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MOZ_ASSERT(!aSheet->GetParentSheet(), "Shouldn't be used for child loads");
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}
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SheetLoadData::~SheetLoadData() {
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MOZ_DIAGNOSTIC_ASSERT(mSheetCompleteCalled || mIntentionallyDropped,
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"Should always call SheetComplete, except when "
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"dropping the load");
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// Do this iteratively to avoid blowing up the stack.
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RefPtr<SheetLoadData> next = std::move(mNext);
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while (next) {
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next = std::move(next->mNext);
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}
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}
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NS_IMETHODIMP
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SheetLoadData::Run() {
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mLoader->HandleLoadEvent(*this);
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return NS_OK;
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}
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NS_IMETHODIMP
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SheetLoadData::OnDispatchedEvent() { return NS_OK; }
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NS_IMETHODIMP
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SheetLoadData::OnProcessNextEvent(nsIThreadInternal* aThread, bool aMayWait) {
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// XXXkhuey this is insane!
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// We want to fire our load even before or after event processing,
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// whichever comes first.
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FireLoadEvent(aThread);
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return NS_OK;
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}
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NS_IMETHODIMP
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SheetLoadData::AfterProcessNextEvent(nsIThreadInternal* aThread,
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bool aEventWasProcessed) {
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// XXXkhuey this too!
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// We want to fire our load even before or after event processing,
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// whichever comes first.
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FireLoadEvent(aThread);
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return NS_OK;
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}
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void SheetLoadData::PrioritizeAsPreload(nsIChannel* aChannel) {
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if (nsCOMPtr<nsISupportsPriority> sp = do_QueryInterface(aChannel)) {
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sp->AdjustPriority(nsISupportsPriority::PRIORITY_HIGHEST);
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}
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}
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void SheetLoadData::PrioritizeAsPreload() { PrioritizeAsPreload(Channel()); }
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void SheetLoadData::FireLoadEvent(nsIThreadInternal* aThread) {
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// First remove ourselves as a thread observer. But we need to keep
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// ourselves alive while doing that!
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RefPtr<SheetLoadData> kungFuDeathGrip(this);
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aThread->RemoveObserver(this);
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// Now fire the event.
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//
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// NOTE(emilio): A bit weird that we fire the event even if the node is no
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// longer in the tree, or the sheet that just loaded / errored is not the
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// current node.sheet, but...
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nsCOMPtr<nsINode> node = mOwningNode;
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MOZ_ASSERT(node, "How did that happen???");
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nsContentUtils::DispatchTrustedEvent(node->OwnerDoc(), node,
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mLoadFailed ? u"error"_ns : u"load"_ns,
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CanBubble::eNo, Cancelable::eNo);
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MOZ_ASSERT(BlocksLoadEvent());
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mLoader->UnblockOnload(true);
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}
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void SheetLoadData::ScheduleLoadEventIfNeeded() {
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if (!mOwningNode) {
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return;
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}
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MOZ_ASSERT(BlocksLoadEvent(), "The rel=preload load event happens elsewhere");
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nsCOMPtr<nsIThread> thread = do_GetCurrentThread();
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nsCOMPtr<nsIThreadInternal> internalThread = do_QueryInterface(thread);
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if (NS_SUCCEEDED(internalThread->AddObserver(this))) {
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mLoader->BlockOnload();
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}
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}
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/*********************
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* Style sheet reuse *
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*********************/
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bool LoaderReusableStyleSheets::FindReusableStyleSheet(
|
|
nsIURI* aURL, RefPtr<StyleSheet>& aResult) {
|
|
MOZ_ASSERT(aURL);
|
|
for (size_t i = mReusableSheets.Length(); i > 0; --i) {
|
|
size_t index = i - 1;
|
|
bool sameURI;
|
|
MOZ_ASSERT(mReusableSheets[index]->GetOriginalURI());
|
|
nsresult rv =
|
|
aURL->Equals(mReusableSheets[index]->GetOriginalURI(), &sameURI);
|
|
if (!NS_FAILED(rv) && sameURI) {
|
|
aResult = mReusableSheets[index];
|
|
mReusableSheets.RemoveElementAt(index);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
/*************************
|
|
* Loader Implementation *
|
|
*************************/
|
|
|
|
Loader::Loader()
|
|
: mDocument(nullptr),
|
|
mCompatMode(eCompatibility_FullStandards),
|
|
mReporter(new ConsoleReportCollector()) {}
|
|
|
|
Loader::Loader(DocGroup* aDocGroup) : Loader() { mDocGroup = aDocGroup; }
|
|
|
|
Loader::Loader(Document* aDocument) : Loader() {
|
|
MOZ_ASSERT(aDocument, "We should get a valid document from the caller!");
|
|
mDocument = aDocument;
|
|
mCompatMode = aDocument->GetCompatibilityMode();
|
|
mSheets = SharedStyleSheetCache::Get();
|
|
RegisterInSheetCache();
|
|
}
|
|
|
|
Loader::~Loader() {
|
|
// Note: no real need to revoke our stylesheet loaded events -- they
|
|
// hold strong references to us, so if we're going away that means
|
|
// they're all done.
|
|
}
|
|
|
|
void Loader::RegisterInSheetCache() {
|
|
MOZ_ASSERT(mDocument);
|
|
MOZ_ASSERT(mSheets);
|
|
|
|
mSheets->RegisterLoader(*this);
|
|
}
|
|
|
|
void Loader::DeregisterFromSheetCache() {
|
|
MOZ_ASSERT(mDocument);
|
|
MOZ_ASSERT(mSheets);
|
|
|
|
mSheets->CancelLoadsForLoader(*this);
|
|
mSheets->UnregisterLoader(*this);
|
|
}
|
|
|
|
void Loader::DropDocumentReference() {
|
|
// Flush out pending datas just so we don't leak by accident.
|
|
if (mSheets) {
|
|
DeregisterFromSheetCache();
|
|
}
|
|
mDocument = nullptr;
|
|
}
|
|
|
|
void Loader::DocumentStyleSheetSetChanged() {
|
|
MOZ_ASSERT(mDocument);
|
|
|
|
// start any pending alternates that aren't alternates anymore
|
|
mSheets->StartDeferredLoadsForLoader(
|
|
*this, SharedStyleSheetCache::StartLoads::IfNonAlternate);
|
|
}
|
|
|
|
static const char kCharsetSym[] = "@charset \"";
|
|
|
|
static bool GetCharsetFromData(const char* aStyleSheetData,
|
|
uint32_t aDataLength, nsACString& aCharset) {
|
|
aCharset.Truncate();
|
|
if (aDataLength <= sizeof(kCharsetSym) - 1) return false;
|
|
|
|
if (strncmp(aStyleSheetData, kCharsetSym, sizeof(kCharsetSym) - 1)) {
|
|
return false;
|
|
}
|
|
|
|
for (uint32_t i = sizeof(kCharsetSym) - 1; i < aDataLength; ++i) {
|
|
char c = aStyleSheetData[i];
|
|
if (c == '"') {
|
|
++i;
|
|
if (i < aDataLength && aStyleSheetData[i] == ';') {
|
|
return true;
|
|
}
|
|
// fail
|
|
break;
|
|
}
|
|
aCharset.Append(c);
|
|
}
|
|
|
|
// Did not see end quote or semicolon
|
|
aCharset.Truncate();
|
|
return false;
|
|
}
|
|
|
|
NotNull<const Encoding*> SheetLoadData::DetermineNonBOMEncoding(
|
|
const nsACString& aSegment, nsIChannel* aChannel) const {
|
|
const Encoding* encoding;
|
|
nsAutoCString label;
|
|
|
|
// Check HTTP
|
|
if (aChannel && NS_SUCCEEDED(aChannel->GetContentCharset(label))) {
|
|
encoding = Encoding::ForLabel(label);
|
|
if (encoding) {
|
|
return WrapNotNull(encoding);
|
|
}
|
|
}
|
|
|
|
// Check @charset
|
|
auto sniffingLength = aSegment.Length();
|
|
if (sniffingLength > SNIFFING_BUFFER_SIZE) {
|
|
sniffingLength = SNIFFING_BUFFER_SIZE;
|
|
}
|
|
if (GetCharsetFromData(aSegment.BeginReading(), sniffingLength, label)) {
|
|
encoding = Encoding::ForLabel(label);
|
|
if (encoding == UTF_16BE_ENCODING || encoding == UTF_16LE_ENCODING) {
|
|
return UTF_8_ENCODING;
|
|
}
|
|
if (encoding) {
|
|
return WrapNotNull(encoding);
|
|
}
|
|
}
|
|
return mGuessedEncoding;
|
|
}
|
|
|
|
static nsresult VerifySheetIntegrity(const SRIMetadata& aMetadata,
|
|
nsIChannel* aChannel,
|
|
const nsACString& aFirst,
|
|
const nsACString& aSecond,
|
|
const nsACString& aSourceFileURI,
|
|
nsIConsoleReportCollector* aReporter) {
|
|
NS_ENSURE_ARG_POINTER(aReporter);
|
|
|
|
if (MOZ_LOG_TEST(SRILogHelper::GetSriLog(), LogLevel::Debug)) {
|
|
nsAutoCString requestURL;
|
|
nsCOMPtr<nsIURI> originalURI;
|
|
if (aChannel &&
|
|
NS_SUCCEEDED(aChannel->GetOriginalURI(getter_AddRefs(originalURI))) &&
|
|
originalURI) {
|
|
originalURI->GetAsciiSpec(requestURL);
|
|
}
|
|
MOZ_LOG(SRILogHelper::GetSriLog(), LogLevel::Debug,
|
|
("VerifySheetIntegrity (unichar stream)"));
|
|
}
|
|
|
|
SRICheckDataVerifier verifier(aMetadata, aSourceFileURI, aReporter);
|
|
nsresult rv =
|
|
verifier.Update(aFirst.Length(), (const uint8_t*)aFirst.BeginReading());
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
rv =
|
|
verifier.Update(aSecond.Length(), (const uint8_t*)aSecond.BeginReading());
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
return verifier.Verify(aMetadata, aChannel, aSourceFileURI, aReporter);
|
|
}
|
|
|
|
static bool AllLoadsCanceled(const SheetLoadData& aData) {
|
|
const SheetLoadData* data = &aData;
|
|
do {
|
|
if (!data->mIsCancelled) {
|
|
return false;
|
|
}
|
|
} while ((data = data->mNext));
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Stream completion code shared by Stylo and the old style system.
|
|
*
|
|
* Here we need to check that the load did not give us an http error
|
|
* page and check the mimetype on the channel to make sure we're not
|
|
* loading non-text/css data in standards mode.
|
|
*/
|
|
nsresult SheetLoadData::VerifySheetReadyToParse(nsresult aStatus,
|
|
const nsACString& aBytes1,
|
|
const nsACString& aBytes2,
|
|
nsIChannel* aChannel) {
|
|
LOG(("SheetLoadData::VerifySheetReadyToParse"));
|
|
NS_ASSERTION(!mLoader->mSyncCallback, "Synchronous callback from necko");
|
|
|
|
if (AllLoadsCanceled(*this)) {
|
|
LOG_WARN((" All loads are canceled, dropping"));
|
|
mLoader->SheetComplete(*this, NS_BINDING_ABORTED);
|
|
return NS_OK;
|
|
}
|
|
|
|
if (NS_FAILED(aStatus)) {
|
|
LOG_WARN(
|
|
(" Load failed: status 0x%" PRIx32, static_cast<uint32_t>(aStatus)));
|
|
// Handle sheet not loading error because source was a tracking URL (or
|
|
// fingerprinting, cryptomining, etc).
|
|
// We make a note of this sheet node by including it in a dedicated
|
|
// array of blocked tracking nodes under its parent document.
|
|
//
|
|
// Multiple sheet load instances might be tied to this request,
|
|
// we annotate each one linked to a valid owning element (node).
|
|
if (net::UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(
|
|
aStatus)) {
|
|
if (Document* doc = mLoader->GetDocument()) {
|
|
for (SheetLoadData* data = this; data; data = data->mNext) {
|
|
// mOwningNode may be null but AddBlockTrackingNode can cope
|
|
doc->AddBlockedNodeByClassifier(
|
|
nsIContent::FromNodeOrNull(data->mOwningNode));
|
|
}
|
|
}
|
|
}
|
|
mLoader->SheetComplete(*this, aStatus);
|
|
return NS_OK;
|
|
}
|
|
|
|
if (!aChannel) {
|
|
mLoader->SheetComplete(*this, NS_OK);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsIURI> originalURI;
|
|
aChannel->GetOriginalURI(getter_AddRefs(originalURI));
|
|
|
|
// If the channel's original URI is "chrome:", we want that, since
|
|
// the observer code in nsXULPrototypeCache depends on chrome stylesheets
|
|
// having a chrome URI. (Whether or not chrome stylesheets come through
|
|
// this codepath seems nondeterministic.)
|
|
// Otherwise we want the potentially-HTTP-redirected URI.
|
|
nsCOMPtr<nsIURI> channelURI;
|
|
NS_GetFinalChannelURI(aChannel, getter_AddRefs(channelURI));
|
|
|
|
if (!channelURI || !originalURI) {
|
|
NS_ERROR("Someone just violated the nsIRequest contract");
|
|
LOG_WARN((" Channel without a URI. Bad!"));
|
|
mLoader->SheetComplete(*this, NS_ERROR_UNEXPECTED);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsIPrincipal> principal;
|
|
nsIScriptSecurityManager* secMan = nsContentUtils::GetSecurityManager();
|
|
nsresult result = NS_ERROR_NOT_AVAILABLE;
|
|
if (secMan) { // Could be null if we already shut down
|
|
if (mUseSystemPrincipal) {
|
|
result = secMan->GetSystemPrincipal(getter_AddRefs(principal));
|
|
} else {
|
|
result = secMan->GetChannelResultPrincipal(aChannel,
|
|
getter_AddRefs(principal));
|
|
}
|
|
}
|
|
|
|
if (NS_FAILED(result)) {
|
|
LOG_WARN((" Couldn't get principal"));
|
|
mLoader->SheetComplete(*this, result);
|
|
return NS_OK;
|
|
}
|
|
|
|
mSheet->SetPrincipal(principal);
|
|
|
|
if (mSheet->GetCORSMode() == CORS_NONE &&
|
|
!mTriggeringPrincipal->Subsumes(principal)) {
|
|
mIsCrossOriginNoCORS = true;
|
|
}
|
|
|
|
// If it's an HTTP channel, we want to make sure this is not an
|
|
// error document we got.
|
|
if (nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aChannel)) {
|
|
bool requestSucceeded;
|
|
result = httpChannel->GetRequestSucceeded(&requestSucceeded);
|
|
if (NS_SUCCEEDED(result) && !requestSucceeded) {
|
|
LOG((" Load returned an error page"));
|
|
mLoader->SheetComplete(*this, NS_ERROR_NOT_AVAILABLE);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsAutoCString sourceMapURL;
|
|
if (nsContentUtils::GetSourceMapURL(httpChannel, sourceMapURL)) {
|
|
mSheet->SetSourceMapURL(NS_ConvertUTF8toUTF16(sourceMapURL));
|
|
}
|
|
}
|
|
|
|
nsAutoCString contentType;
|
|
aChannel->GetContentType(contentType);
|
|
|
|
// In standards mode, a style sheet must have one of these MIME
|
|
// types to be processed at all. In quirks mode, we accept any
|
|
// MIME type, but only if the style sheet is same-origin with the
|
|
// requesting document or parent sheet. See bug 524223.
|
|
|
|
bool validType = contentType.EqualsLiteral("text/css") ||
|
|
contentType.EqualsLiteral(UNKNOWN_CONTENT_TYPE) ||
|
|
contentType.IsEmpty();
|
|
|
|
if (!validType) {
|
|
const char* errorMessage;
|
|
uint32_t errorFlag;
|
|
bool sameOrigin = true;
|
|
|
|
bool subsumed;
|
|
result = mTriggeringPrincipal->Subsumes(principal, &subsumed);
|
|
if (NS_FAILED(result) || !subsumed) {
|
|
sameOrigin = false;
|
|
}
|
|
|
|
if (sameOrigin && mLoader->mCompatMode == eCompatibility_NavQuirks) {
|
|
errorMessage = "MimeNotCssWarn";
|
|
errorFlag = nsIScriptError::warningFlag;
|
|
} else {
|
|
errorMessage = "MimeNotCss";
|
|
errorFlag = nsIScriptError::errorFlag;
|
|
}
|
|
|
|
AutoTArray<nsString, 2> strings;
|
|
CopyUTF8toUTF16(channelURI->GetSpecOrDefault(), *strings.AppendElement());
|
|
CopyASCIItoUTF16(contentType, *strings.AppendElement());
|
|
|
|
nsCOMPtr<nsIURI> referrer = ReferrerInfo()->GetOriginalReferrer();
|
|
nsContentUtils::ReportToConsole(
|
|
errorFlag, "CSS Loader"_ns, mLoader->mDocument,
|
|
nsContentUtils::eCSS_PROPERTIES, errorMessage, strings, referrer);
|
|
|
|
if (errorFlag == nsIScriptError::errorFlag) {
|
|
LOG_WARN(
|
|
(" Ignoring sheet with improper MIME type %s", contentType.get()));
|
|
mLoader->SheetComplete(*this, NS_ERROR_NOT_AVAILABLE);
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
SRIMetadata sriMetadata;
|
|
mSheet->GetIntegrity(sriMetadata);
|
|
if (!sriMetadata.IsEmpty()) {
|
|
nsAutoCString sourceUri;
|
|
if (mLoader->mDocument && mLoader->mDocument->GetDocumentURI()) {
|
|
mLoader->mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
|
|
}
|
|
nsresult rv = VerifySheetIntegrity(sriMetadata, aChannel, aBytes1, aBytes2,
|
|
sourceUri, mLoader->mReporter);
|
|
|
|
nsCOMPtr<nsILoadGroup> loadGroup;
|
|
aChannel->GetLoadGroup(getter_AddRefs(loadGroup));
|
|
if (loadGroup) {
|
|
mLoader->mReporter->FlushConsoleReports(loadGroup);
|
|
} else {
|
|
mLoader->mReporter->FlushConsoleReports(mLoader->mDocument);
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
LOG((" Load was blocked by SRI"));
|
|
MOZ_LOG(gSriPRLog, LogLevel::Debug,
|
|
("css::Loader::OnStreamComplete, bad metadata"));
|
|
mLoader->SheetComplete(*this, NS_ERROR_SRI_CORRUPT);
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
// Enough to set the URIs on mSheet, since any sibling datas we have share
|
|
// the same mInner as mSheet and will thus get the same URI.
|
|
mSheet->SetURIs(channelURI, originalURI, channelURI);
|
|
|
|
ReferrerPolicy policy =
|
|
nsContentUtils::GetReferrerPolicyFromChannel(aChannel);
|
|
nsCOMPtr<nsIReferrerInfo> referrerInfo =
|
|
ReferrerInfo::CreateForExternalCSSResources(mSheet, policy);
|
|
|
|
mSheet->SetReferrerInfo(referrerInfo);
|
|
return NS_OK_PARSE_SHEET;
|
|
}
|
|
|
|
Loader::IsAlternate Loader::IsAlternateSheet(const nsAString& aTitle,
|
|
bool aHasAlternateRel) {
|
|
// A sheet is alternate if it has a nonempty title that doesn't match the
|
|
// currently selected style set. But if there _is_ no currently selected
|
|
// style set, the sheet wasn't marked as an alternate explicitly, and aTitle
|
|
// is nonempty, we should select the style set corresponding to aTitle, since
|
|
// that's a preferred sheet.
|
|
if (aTitle.IsEmpty()) {
|
|
return IsAlternate::No;
|
|
}
|
|
|
|
if (mDocument) {
|
|
const nsString& currentSheetSet = mDocument->GetCurrentStyleSheetSet();
|
|
if (!aHasAlternateRel && currentSheetSet.IsEmpty()) {
|
|
// There's no preferred set yet, and we now have a sheet with a title.
|
|
// Make that be the preferred set.
|
|
// FIXME(emilio): This is kinda wild, can we do it somewhere else?
|
|
mDocument->SetPreferredStyleSheetSet(aTitle);
|
|
// We're definitely not an alternate. Also, beware that at this point
|
|
// currentSheetSet may dangle.
|
|
return IsAlternate::No;
|
|
}
|
|
|
|
if (aTitle.Equals(currentSheetSet)) {
|
|
return IsAlternate::No;
|
|
}
|
|
}
|
|
|
|
return IsAlternate::Yes;
|
|
}
|
|
|
|
nsresult Loader::CheckContentPolicy(nsIPrincipal* aLoadingPrincipal,
|
|
nsIPrincipal* aTriggeringPrincipal,
|
|
nsIURI* aTargetURI,
|
|
nsINode* aRequestingNode,
|
|
const nsAString& aNonce,
|
|
IsPreload aIsPreload) {
|
|
// When performing a system load don't consult content policies.
|
|
if (!mDocument) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsContentPolicyType contentPolicyType =
|
|
aIsPreload == IsPreload::No
|
|
? nsIContentPolicy::TYPE_INTERNAL_STYLESHEET
|
|
: nsIContentPolicy::TYPE_INTERNAL_STYLESHEET_PRELOAD;
|
|
|
|
nsCOMPtr<nsILoadInfo> secCheckLoadInfo = new net::LoadInfo(
|
|
aLoadingPrincipal, aTriggeringPrincipal, aRequestingNode,
|
|
nsILoadInfo::SEC_ONLY_FOR_EXPLICIT_CONTENTSEC_CHECK, contentPolicyType);
|
|
|
|
// snapshot the nonce at load start time for performing CSP checks
|
|
if (contentPolicyType == nsIContentPolicy::TYPE_INTERNAL_STYLESHEET) {
|
|
secCheckLoadInfo->SetCspNonce(aNonce);
|
|
MOZ_ASSERT_IF(aIsPreload != IsPreload::No, aNonce.IsEmpty());
|
|
}
|
|
|
|
int16_t shouldLoad = nsIContentPolicy::ACCEPT;
|
|
nsresult rv = NS_CheckContentLoadPolicy(aTargetURI, secCheckLoadInfo,
|
|
"text/css"_ns, &shouldLoad,
|
|
nsContentUtils::GetContentPolicy());
|
|
if (NS_FAILED(rv) || NS_CP_REJECTED(shouldLoad)) {
|
|
return NS_ERROR_CONTENT_BLOCKED;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
static void RecordUseCountersIfNeeded(Document* aDoc,
|
|
const StyleUseCounters* aCounters) {
|
|
if (!aDoc || !aCounters) {
|
|
return;
|
|
}
|
|
const StyleUseCounters* docCounters = aDoc->GetStyleUseCounters();
|
|
if (!docCounters) {
|
|
return;
|
|
}
|
|
Servo_UseCounters_Merge(docCounters, aCounters);
|
|
aDoc->MaybeWarnAboutZoom();
|
|
}
|
|
|
|
void Loader::DidHitCompleteSheetCache(const SheetLoadDataHashKey& aKey,
|
|
const StyleUseCounters* aCounters) {
|
|
MOZ_ASSERT(mDocument);
|
|
if (mLoadsPerformed.EnsureInserted(aKey)) {
|
|
RecordUseCountersIfNeeded(mDocument, aCounters);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* CreateSheet() creates a StyleSheet object for the given URI.
|
|
*
|
|
* We check for an existing style sheet object for that uri in various caches
|
|
* and clone it if we find it. Cloned sheets will have the title/media/enabled
|
|
* state of the sheet they are clones off; make sure to call PrepareSheet() on
|
|
* the result of CreateSheet().
|
|
*/
|
|
std::tuple<RefPtr<StyleSheet>, Loader::SheetState> Loader::CreateSheet(
|
|
nsIURI* aURI, nsIContent* aLinkingContent,
|
|
nsIPrincipal* aTriggeringPrincipal, css::SheetParsingMode aParsingMode,
|
|
CORSMode aCORSMode, const Encoding* aPreloadOrParentDataEncoding,
|
|
const nsAString& aIntegrity, bool aSyncLoad, IsPreload aIsPreload) {
|
|
MOZ_ASSERT(aURI, "This path is not taken for inline stylesheets");
|
|
LOG(("css::Loader::CreateSheet(%s)", aURI->GetSpecOrDefault().get()));
|
|
|
|
SRIMetadata sriMetadata;
|
|
if (!aIntegrity.IsEmpty()) {
|
|
MOZ_LOG(gSriPRLog, LogLevel::Debug,
|
|
("css::Loader::CreateSheet, integrity=%s",
|
|
NS_ConvertUTF16toUTF8(aIntegrity).get()));
|
|
nsAutoCString sourceUri;
|
|
if (mDocument && mDocument->GetDocumentURI()) {
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
|
|
}
|
|
SRICheck::IntegrityMetadata(aIntegrity, sourceUri, mReporter, &sriMetadata);
|
|
}
|
|
|
|
if (mSheets) {
|
|
SheetLoadDataHashKey key(
|
|
aURI, aTriggeringPrincipal, LoaderPrincipal(), PartitionedPrincipal(),
|
|
GetFallbackEncoding(*this, aLinkingContent,
|
|
aPreloadOrParentDataEncoding),
|
|
aCORSMode, aParsingMode, mCompatMode, sriMetadata, aIsPreload);
|
|
auto cacheResult = mSheets->Lookup(*this, key, aSyncLoad);
|
|
if (const auto& [styleSheet, sheetState] = cacheResult; styleSheet) {
|
|
LOG((" Hit cache with state: %s", gStateStrings[size_t(sheetState)]));
|
|
return cacheResult;
|
|
}
|
|
}
|
|
|
|
nsIURI* sheetURI = aURI;
|
|
nsIURI* baseURI = aURI;
|
|
nsIURI* originalURI = aURI;
|
|
|
|
auto sheet = MakeRefPtr<StyleSheet>(aParsingMode, aCORSMode, sriMetadata);
|
|
sheet->SetURIs(sheetURI, originalURI, baseURI);
|
|
nsCOMPtr<nsIReferrerInfo> referrerInfo =
|
|
ReferrerInfo::CreateForExternalCSSResources(sheet);
|
|
sheet->SetReferrerInfo(referrerInfo);
|
|
LOG((" Needs parser"));
|
|
return {std::move(sheet), SheetState::NeedsParser};
|
|
}
|
|
|
|
static Loader::MediaMatched MediaListMatches(const MediaList* aMediaList,
|
|
const Document* aDocument) {
|
|
if (!aMediaList || !aDocument) {
|
|
return Loader::MediaMatched::Yes;
|
|
}
|
|
|
|
if (aMediaList->Matches(*aDocument)) {
|
|
return Loader::MediaMatched::Yes;
|
|
}
|
|
|
|
return Loader::MediaMatched::No;
|
|
}
|
|
|
|
/**
|
|
* PrepareSheet() handles setting the media and title on the sheet, as
|
|
* well as setting the enabled state based on the title and whether
|
|
* the sheet had "alternate" in its rel.
|
|
*/
|
|
Loader::MediaMatched Loader::PrepareSheet(
|
|
StyleSheet& aSheet, const nsAString& aTitle, const nsAString& aMediaString,
|
|
MediaList* aMediaList, IsAlternate aIsAlternate,
|
|
IsExplicitlyEnabled aIsExplicitlyEnabled) {
|
|
RefPtr<MediaList> mediaList(aMediaList);
|
|
|
|
if (!aMediaString.IsEmpty()) {
|
|
NS_ASSERTION(!aMediaList,
|
|
"must not provide both aMediaString and aMediaList");
|
|
mediaList = MediaList::Create(aMediaString);
|
|
}
|
|
|
|
aSheet.SetMedia(do_AddRef(mediaList));
|
|
|
|
aSheet.SetTitle(aTitle);
|
|
aSheet.SetEnabled(aIsAlternate == IsAlternate::No ||
|
|
aIsExplicitlyEnabled == IsExplicitlyEnabled::Yes);
|
|
return MediaListMatches(mediaList, mDocument);
|
|
}
|
|
|
|
/**
|
|
* InsertSheetInTree handles ordering of sheets in the document or shadow root.
|
|
*
|
|
* Here we have two types of sheets -- those with linking elements and
|
|
* those without. The latter are loaded by Link: headers, and are only added to
|
|
* the document.
|
|
*
|
|
* The following constraints are observed:
|
|
* 1) Any sheet with a linking element comes after all sheets without
|
|
* linking elements
|
|
* 2) Sheets without linking elements are inserted in the order in
|
|
* which the inserting requests come in, since all of these are
|
|
* inserted during header data processing in the content sink
|
|
* 3) Sheets with linking elements are ordered based on document order
|
|
* as determined by CompareDocumentPosition.
|
|
*/
|
|
void Loader::InsertSheetInTree(StyleSheet& aSheet, nsINode* aOwningNode) {
|
|
LOG(("css::Loader::InsertSheetInTree"));
|
|
MOZ_ASSERT(mDocument, "Must have a document to insert into");
|
|
MOZ_ASSERT(!aOwningNode || aOwningNode->IsInUncomposedDoc() ||
|
|
aOwningNode->IsInShadowTree(),
|
|
"Why would we insert it anywhere?");
|
|
ShadowRoot* shadow =
|
|
aOwningNode ? aOwningNode->GetContainingShadow() : nullptr;
|
|
|
|
auto& target = shadow ? static_cast<DocumentOrShadowRoot&>(*shadow)
|
|
: static_cast<DocumentOrShadowRoot&>(*mDocument);
|
|
|
|
// XXX Need to cancel pending sheet loads for this element, if any
|
|
|
|
int32_t sheetCount = target.SheetCount();
|
|
|
|
/*
|
|
* Start the walk at the _end_ of the list, since in the typical
|
|
* case we'll just want to append anyway. We want to break out of
|
|
* the loop when insertionPoint points to just before the index we
|
|
* want to insert at. In other words, when we leave the loop
|
|
* insertionPoint is the index of the stylesheet that immediately
|
|
* precedes the one we're inserting.
|
|
*/
|
|
int32_t insertionPoint = sheetCount - 1;
|
|
for (; insertionPoint >= 0; --insertionPoint) {
|
|
nsINode* sheetOwner = target.SheetAt(insertionPoint)->GetOwnerNode();
|
|
if (sheetOwner && !aOwningNode) {
|
|
// Keep moving; all sheets with a sheetOwner come after all
|
|
// sheets without a linkingNode
|
|
continue;
|
|
}
|
|
|
|
if (!sheetOwner) {
|
|
// Aha! The current sheet has no sheet owner, so we want to insert after
|
|
// it no matter whether we have a linking content or not.
|
|
break;
|
|
}
|
|
|
|
MOZ_ASSERT(aOwningNode != sheetOwner,
|
|
"Why do we still have our old sheet?");
|
|
|
|
// Have to compare
|
|
if (nsContentUtils::PositionIsBefore(sheetOwner, aOwningNode)) {
|
|
// The current sheet comes before us, and it better be the first
|
|
// such, because now we break
|
|
break;
|
|
}
|
|
}
|
|
|
|
++insertionPoint;
|
|
|
|
if (shadow) {
|
|
shadow->InsertSheetAt(insertionPoint, aSheet);
|
|
} else {
|
|
mDocument->InsertSheetAt(insertionPoint, aSheet);
|
|
}
|
|
|
|
LOG((" Inserting into target (doc: %d) at position %d",
|
|
target.AsNode().IsDocument(), insertionPoint));
|
|
}
|
|
|
|
/**
|
|
* InsertChildSheet handles ordering of @import-ed sheet in their
|
|
* parent sheets. Here we want to just insert based on order of the
|
|
* @import rules that imported the sheets. In theory we can't just
|
|
* append to the end because the CSSOM can insert @import rules. In
|
|
* practice, we get the call to load the child sheet before the CSSOM
|
|
* has finished inserting the @import rule, so we have no idea where
|
|
* to put it anyway. So just append for now. (In the future if we
|
|
* want to insert the sheet at the correct position, we'll need to
|
|
* restore CSSStyleSheet::InsertStyleSheetAt, which was removed in
|
|
* bug 1220506.)
|
|
*/
|
|
void Loader::InsertChildSheet(StyleSheet& aSheet, StyleSheet& aParentSheet) {
|
|
LOG(("css::Loader::InsertChildSheet"));
|
|
|
|
// child sheets should always start out enabled, even if they got
|
|
// cloned off of top-level sheets which were disabled
|
|
aSheet.SetEnabled(true);
|
|
aParentSheet.AppendStyleSheet(aSheet);
|
|
|
|
LOG((" Inserting into parent sheet"));
|
|
}
|
|
|
|
/**
|
|
* LoadSheet handles the actual load of a sheet. If the load is
|
|
* supposed to be synchronous it just opens a channel synchronously
|
|
* using the given uri, wraps the resulting stream in a converter
|
|
* stream and calls ParseSheet. Otherwise it tries to look for an
|
|
* existing load for this URI and piggyback on it. Failing all that,
|
|
* a new load is kicked off asynchronously.
|
|
*/
|
|
nsresult Loader::LoadSheet(SheetLoadData& aLoadData, SheetState aSheetState,
|
|
PendingLoad aPendingLoad) {
|
|
LOG(("css::Loader::LoadSheet"));
|
|
MOZ_ASSERT(aLoadData.mURI, "Need a URI to load");
|
|
MOZ_ASSERT(aLoadData.mSheet, "Need a sheet to load into");
|
|
MOZ_ASSERT(aSheetState != SheetState::Complete, "Why bother?");
|
|
MOZ_ASSERT(!aLoadData.mUseSystemPrincipal || aLoadData.mSyncLoad,
|
|
"Shouldn't use system principal for async loads");
|
|
|
|
LOG_URI(" Load from: '%s'", aLoadData.mURI);
|
|
|
|
// If we're firing a pending load, this load is already accounted for the
|
|
// first time it went through this function.
|
|
if (aPendingLoad == PendingLoad::No) {
|
|
if (aLoadData.BlocksLoadEvent()) {
|
|
IncrementOngoingLoadCount();
|
|
}
|
|
|
|
// We technically never defer non-top-level sheets, so this condition could
|
|
// be outside the branch, but conceptually it should be here.
|
|
if (aLoadData.mParentData) {
|
|
++aLoadData.mParentData->mPendingChildren;
|
|
}
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
if (!mDocument && !aLoadData.mIsNonDocumentSheet) {
|
|
// No point starting the load; just release all the data and such.
|
|
LOG_WARN((" No document and not non-document sheet; pre-dropping load"));
|
|
SheetComplete(aLoadData, NS_BINDING_ABORTED);
|
|
return NS_BINDING_ABORTED;
|
|
}
|
|
|
|
SRIMetadata sriMetadata;
|
|
aLoadData.mSheet->GetIntegrity(sriMetadata);
|
|
|
|
if (aLoadData.mSyncLoad) {
|
|
LOG((" Synchronous load"));
|
|
MOZ_ASSERT(!aLoadData.mObserver, "Observer for a sync load?");
|
|
MOZ_ASSERT(aSheetState == SheetState::NeedsParser,
|
|
"Sync loads can't reuse existing async loads");
|
|
|
|
// Create a StreamLoader instance to which we will feed
|
|
// the data from the sync load. Do this before creating the
|
|
// channel to make error recovery simpler.
|
|
auto streamLoader = MakeRefPtr<StreamLoader>(aLoadData);
|
|
|
|
if (mDocument) {
|
|
net::PredictorLearn(aLoadData.mURI, mDocument->GetDocumentURI(),
|
|
nsINetworkPredictor::LEARN_LOAD_SUBRESOURCE,
|
|
mDocument);
|
|
}
|
|
|
|
nsSecurityFlags securityFlags =
|
|
nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_INHERITS_SEC_CONTEXT |
|
|
nsILoadInfo::SEC_ALLOW_CHROME;
|
|
|
|
nsContentPolicyType contentPolicyType =
|
|
aLoadData.mIsPreload == IsPreload::No
|
|
? nsIContentPolicy::TYPE_INTERNAL_STYLESHEET
|
|
: nsIContentPolicy::TYPE_INTERNAL_STYLESHEET_PRELOAD;
|
|
|
|
// Just load it
|
|
nsCOMPtr<nsIChannel> channel;
|
|
// Note that we are calling NS_NewChannelWithTriggeringPrincipal() with both
|
|
// a node and a principal.
|
|
// This is because of a case where the node is the document being styled and
|
|
// the principal is the stylesheet (perhaps from a different origin) that is
|
|
// applying the styles.
|
|
if (aLoadData.mRequestingNode) {
|
|
rv = NS_NewChannelWithTriggeringPrincipal(
|
|
getter_AddRefs(channel), aLoadData.mURI, aLoadData.mRequestingNode,
|
|
aLoadData.mTriggeringPrincipal, securityFlags, contentPolicyType);
|
|
} else {
|
|
MOZ_ASSERT(aLoadData.mTriggeringPrincipal->Equals(LoaderPrincipal()));
|
|
auto result = URLPreloader::ReadURI(aLoadData.mURI);
|
|
if (result.isOk()) {
|
|
nsCOMPtr<nsIInputStream> stream;
|
|
MOZ_TRY(
|
|
NS_NewCStringInputStream(getter_AddRefs(stream), result.unwrap()));
|
|
|
|
rv = NS_NewInputStreamChannel(
|
|
getter_AddRefs(channel), aLoadData.mURI, stream.forget(),
|
|
aLoadData.mTriggeringPrincipal, securityFlags, contentPolicyType);
|
|
} else {
|
|
rv = NS_NewChannel(getter_AddRefs(channel), aLoadData.mURI,
|
|
aLoadData.mTriggeringPrincipal, securityFlags,
|
|
contentPolicyType);
|
|
}
|
|
}
|
|
if (NS_FAILED(rv)) {
|
|
LOG_ERROR((" Failed to create channel"));
|
|
streamLoader->ChannelOpenFailed(rv);
|
|
SheetComplete(aLoadData, rv);
|
|
return rv;
|
|
}
|
|
|
|
// snapshot the nonce at load start time for performing CSP checks
|
|
if (contentPolicyType == nsIContentPolicy::TYPE_INTERNAL_STYLESHEET) {
|
|
if (aLoadData.mRequestingNode) {
|
|
// TODO(bug 1607009) move to SheetLoadData
|
|
nsString* cspNonce = static_cast<nsString*>(
|
|
aLoadData.mRequestingNode->GetProperty(nsGkAtoms::nonce));
|
|
if (cspNonce) {
|
|
nsCOMPtr<nsILoadInfo> loadInfo = channel->LoadInfo();
|
|
loadInfo->SetCspNonce(*cspNonce);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIInputStream> stream;
|
|
rv = channel->Open(getter_AddRefs(stream));
|
|
|
|
if (NS_FAILED(rv)) {
|
|
LOG_ERROR((" Failed to open URI synchronously"));
|
|
streamLoader->ChannelOpenFailed(rv);
|
|
SheetComplete(aLoadData, rv);
|
|
return rv;
|
|
}
|
|
|
|
// Force UA sheets to be UTF-8.
|
|
// XXX this is only necessary because the default in
|
|
// SheetLoadData::OnDetermineCharset is wrong (bug 521039).
|
|
channel->SetContentCharset("UTF-8"_ns);
|
|
|
|
// Manually feed the streamloader the contents of the stream.
|
|
// This will call back into OnStreamComplete
|
|
// and thence to ParseSheet. Regardless of whether this fails,
|
|
// SheetComplete has been called.
|
|
return nsSyncLoadService::PushSyncStreamToListener(stream.forget(),
|
|
streamLoader, channel);
|
|
}
|
|
|
|
SheetLoadDataHashKey key(aLoadData);
|
|
|
|
auto preloadKey = PreloadHashKey::CreateAsStyle(aLoadData);
|
|
bool coalescedLoad = false;
|
|
if (mSheets) {
|
|
// If we have at least one other load ongoing, then we can defer it until
|
|
// all non-pending loads are done.
|
|
if (aSheetState == SheetState::NeedsParser &&
|
|
aPendingLoad == PendingLoad::No && aLoadData.ShouldDefer() &&
|
|
mOngoingLoadCount > mPendingLoadCount + 1) {
|
|
LOG((" Deferring sheet load"));
|
|
++mPendingLoadCount;
|
|
mSheets->DeferSheetLoad(key, aLoadData);
|
|
return NS_OK;
|
|
}
|
|
|
|
if ((coalescedLoad = mSheets->CoalesceLoad(key, aLoadData, aSheetState))) {
|
|
if (aSheetState == SheetState::Pending) {
|
|
++mPendingLoadCount;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
}
|
|
|
|
aLoadData.NotifyOpen(preloadKey, mDocument,
|
|
aLoadData.mIsPreload == IsPreload::FromLink);
|
|
if (coalescedLoad) {
|
|
// All done here; once the load completes we'll be marked complete
|
|
// automatically.
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsILoadGroup> loadGroup;
|
|
nsCOMPtr<nsICookieJarSettings> cookieJarSettings;
|
|
if (mDocument) {
|
|
loadGroup = mDocument->GetDocumentLoadGroup();
|
|
// load for a document with no loadgrup indicates that something is
|
|
// completely bogus, let's bail out early.
|
|
if (!loadGroup) {
|
|
LOG_ERROR((" Failed to query loadGroup from document"));
|
|
SheetComplete(aLoadData, NS_ERROR_UNEXPECTED);
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
cookieJarSettings = mDocument->CookieJarSettings();
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
AutoRestore<bool> syncCallbackGuard(mSyncCallback);
|
|
mSyncCallback = true;
|
|
#endif
|
|
|
|
CORSMode ourCORSMode = aLoadData.mSheet->GetCORSMode();
|
|
nsSecurityFlags securityFlags =
|
|
ourCORSMode == CORS_NONE
|
|
? nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_INHERITS_SEC_CONTEXT
|
|
: nsILoadInfo::SEC_REQUIRE_CORS_INHERITS_SEC_CONTEXT;
|
|
if (ourCORSMode == CORS_ANONYMOUS) {
|
|
securityFlags |= nsILoadInfo::SEC_COOKIES_SAME_ORIGIN;
|
|
} else if (ourCORSMode == CORS_USE_CREDENTIALS) {
|
|
securityFlags |= nsILoadInfo::SEC_COOKIES_INCLUDE;
|
|
}
|
|
securityFlags |= nsILoadInfo::SEC_ALLOW_CHROME;
|
|
|
|
nsContentPolicyType contentPolicyType =
|
|
aLoadData.mIsPreload == IsPreload::No
|
|
? nsIContentPolicy::TYPE_INTERNAL_STYLESHEET
|
|
: nsIContentPolicy::TYPE_INTERNAL_STYLESHEET_PRELOAD;
|
|
|
|
nsCOMPtr<nsIChannel> channel;
|
|
// Note we are calling NS_NewChannelWithTriggeringPrincipal here with a node
|
|
// and a principal. This is because of a case where the node is the document
|
|
// being styled and the principal is the stylesheet (perhaps from a different
|
|
// origin) that is applying the styles.
|
|
if (aLoadData.mRequestingNode) {
|
|
rv = NS_NewChannelWithTriggeringPrincipal(
|
|
getter_AddRefs(channel), aLoadData.mURI, aLoadData.mRequestingNode,
|
|
aLoadData.mTriggeringPrincipal, securityFlags, contentPolicyType,
|
|
/* PerformanceStorage */ nullptr, loadGroup);
|
|
} else {
|
|
MOZ_ASSERT(aLoadData.mTriggeringPrincipal->Equals(LoaderPrincipal()));
|
|
rv = NS_NewChannel(getter_AddRefs(channel), aLoadData.mURI,
|
|
aLoadData.mTriggeringPrincipal, securityFlags,
|
|
contentPolicyType, cookieJarSettings,
|
|
/* aPerformanceStorage */ nullptr, loadGroup);
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
LOG_ERROR((" Failed to create channel"));
|
|
SheetComplete(aLoadData, rv);
|
|
return rv;
|
|
}
|
|
|
|
// snapshot the nonce at load start time for performing CSP checks
|
|
if (contentPolicyType == nsIContentPolicy::TYPE_INTERNAL_STYLESHEET) {
|
|
if (aLoadData.mRequestingNode) {
|
|
// TODO(bug 1607009) move to SheetLoadData
|
|
nsString* cspNonce = static_cast<nsString*>(
|
|
aLoadData.mRequestingNode->GetProperty(nsGkAtoms::nonce));
|
|
if (cspNonce) {
|
|
nsCOMPtr<nsILoadInfo> loadInfo = channel->LoadInfo();
|
|
loadInfo->SetCspNonce(*cspNonce);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!aLoadData.ShouldDefer()) {
|
|
if (nsCOMPtr<nsIClassOfService> cos = do_QueryInterface(channel)) {
|
|
cos->AddClassFlags(nsIClassOfService::Leader);
|
|
}
|
|
if (aLoadData.mIsPreload == IsPreload::FromLink) {
|
|
SheetLoadData::PrioritizeAsPreload(channel);
|
|
SheetLoadData::AddLoadBackgroundFlag(channel);
|
|
}
|
|
}
|
|
|
|
if (nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(channel)) {
|
|
if (nsCOMPtr<nsIReferrerInfo> referrerInfo = aLoadData.ReferrerInfo()) {
|
|
rv = httpChannel->SetReferrerInfo(referrerInfo);
|
|
Unused << NS_WARN_IF(NS_FAILED(rv));
|
|
}
|
|
|
|
nsCOMPtr<nsIHttpChannelInternal> internalChannel =
|
|
do_QueryInterface(httpChannel);
|
|
if (internalChannel) {
|
|
rv = internalChannel->SetIntegrityMetadata(
|
|
sriMetadata.GetIntegrityString());
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
// Set the initiator type
|
|
if (nsCOMPtr<nsITimedChannel> timedChannel =
|
|
do_QueryInterface(httpChannel)) {
|
|
if (aLoadData.mParentData) {
|
|
timedChannel->SetInitiatorType(u"css"_ns);
|
|
|
|
// This is a child sheet load.
|
|
//
|
|
// The resource timing of the sub-resources that a document loads
|
|
// should normally be reported to the document. One exception is any
|
|
// sub-resources of any cross-origin resources that are loaded. We
|
|
// don't mind reporting timing data for a direct child cross-origin
|
|
// resource since the resource that linked to it (and hence potentially
|
|
// anything in that parent origin) is aware that the cross-origin
|
|
// resources is to be loaded. However, we do not want to report
|
|
// timings for any sub-resources that a cross-origin resource may load
|
|
// since that obviously leaks information about what the cross-origin
|
|
// resource loads, which is bad.
|
|
//
|
|
// In addition to checking whether we're an immediate child resource of
|
|
// a cross-origin resource (by checking if mIsCrossOriginNoCORS is set
|
|
// to true on our parent), we also check our parent to see whether it
|
|
// itself is a sub-resource of a cross-origin resource by checking
|
|
// mBlockResourceTiming. If that is set then we too are such a
|
|
// sub-resource and so we set the flag on ourself too to propagate it
|
|
// on down.
|
|
if (aLoadData.mParentData->mIsCrossOriginNoCORS ||
|
|
aLoadData.mParentData->mBlockResourceTiming) {
|
|
// Set a flag so any other stylesheet triggered by this one will
|
|
// not be reported
|
|
aLoadData.mBlockResourceTiming = true;
|
|
|
|
// Mark the channel so PerformanceMainThread::AddEntry will not
|
|
// report the resource.
|
|
timedChannel->SetReportResourceTiming(false);
|
|
}
|
|
|
|
} else {
|
|
timedChannel->SetInitiatorType(u"link"_ns);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Now tell the channel we expect text/css data back.... We do
|
|
// this before opening it, so it's only treated as a hint.
|
|
channel->SetContentType("text/css"_ns);
|
|
|
|
// We don't have to hold on to the stream loader. The ownership
|
|
// model is: Necko owns the stream loader, which owns the load data,
|
|
// which owns us
|
|
auto streamLoader = MakeRefPtr<StreamLoader>(aLoadData);
|
|
if (mDocument) {
|
|
net::PredictorLearn(aLoadData.mURI, mDocument->GetDocumentURI(),
|
|
nsINetworkPredictor::LEARN_LOAD_SUBRESOURCE, mDocument);
|
|
}
|
|
|
|
rv = channel->AsyncOpen(streamLoader);
|
|
if (NS_FAILED(rv)) {
|
|
LOG_ERROR((" Failed to create stream loader"));
|
|
streamLoader->ChannelOpenFailed(rv);
|
|
// NOTE: NotifyStop will be done in SheetComplete -> NotifyObservers.
|
|
aLoadData.NotifyStart(channel);
|
|
SheetComplete(aLoadData, rv);
|
|
return rv;
|
|
}
|
|
|
|
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
|
|
if (nsCOMPtr<nsIHttpChannelInternal> hci = do_QueryInterface(channel)) {
|
|
hci->DoDiagnosticAssertWhenOnStopNotCalledOnDestroy();
|
|
}
|
|
#endif
|
|
|
|
if (mSheets) {
|
|
mSheets->LoadStarted(key, aLoadData);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* ParseSheet handles parsing the data stream.
|
|
*/
|
|
Loader::Completed Loader::ParseSheet(const nsACString& aBytes,
|
|
SheetLoadData& aLoadData,
|
|
AllowAsyncParse aAllowAsync) {
|
|
LOG(("css::Loader::ParseSheet"));
|
|
if (aLoadData.mURI) {
|
|
LOG_URI(" Load succeeded for URI: '%s', parsing", aLoadData.mURI);
|
|
}
|
|
AUTO_PROFILER_LABEL("css::Loader::ParseSheet", LAYOUT_CSSParsing);
|
|
|
|
++mParsedSheetCount;
|
|
|
|
aLoadData.mIsBeingParsed = true;
|
|
|
|
StyleSheet* sheet = aLoadData.mSheet;
|
|
MOZ_ASSERT(sheet);
|
|
|
|
// Some cases, like inline style and UA stylesheets, need to be parsed
|
|
// synchronously. The former may trigger child loads, the latter must not.
|
|
if (aLoadData.mSyncLoad || aAllowAsync == AllowAsyncParse::No) {
|
|
sheet->ParseSheetSync(this, aBytes, &aLoadData, aLoadData.mLineNumber);
|
|
aLoadData.mIsBeingParsed = false;
|
|
|
|
bool noPendingChildren = aLoadData.mPendingChildren == 0;
|
|
MOZ_ASSERT_IF(aLoadData.mSyncLoad, noPendingChildren);
|
|
if (noPendingChildren) {
|
|
SheetComplete(aLoadData, NS_OK);
|
|
return Completed::Yes;
|
|
}
|
|
return Completed::No;
|
|
}
|
|
|
|
// This parse does not need to be synchronous. \o/
|
|
//
|
|
// Note that load is already blocked from IncrementOngoingLoadCount(), and
|
|
// will be unblocked from SheetFinishedParsingAsync which will end up in
|
|
// NotifyObservers as needed.
|
|
nsCOMPtr<nsISerialEventTarget> target = DispatchTarget();
|
|
sheet->ParseSheet(*this, aBytes, aLoadData)
|
|
->Then(
|
|
target, __func__,
|
|
[loadData = RefPtr<SheetLoadData>(&aLoadData)](bool aDummy) {
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
loadData->SheetFinishedParsingAsync();
|
|
},
|
|
[] { MOZ_CRASH("rejected parse promise"); });
|
|
return Completed::No;
|
|
}
|
|
|
|
void Loader::NotifyObservers(SheetLoadData& aData, nsresult aStatus) {
|
|
RecordUseCountersIfNeeded(mDocument, aData.mUseCounters.get());
|
|
if (aData.mURI) {
|
|
mLoadsPerformed.PutEntry(SheetLoadDataHashKey(aData));
|
|
aData.NotifyStop(aStatus);
|
|
// NOTE(emilio): This needs to happen before notifying observers, as
|
|
// FontFaceSet for example checks for pending sheet loads from the
|
|
// StyleSheetLoaded callback.
|
|
if (aData.BlocksLoadEvent()) {
|
|
DecrementOngoingLoadCount();
|
|
}
|
|
}
|
|
|
|
if (aData.mMustNotify) {
|
|
if (aData.mObserver) {
|
|
LOG((" Notifying observer %p for data %p. deferred: %d",
|
|
aData.mObserver.get(), &aData, aData.ShouldDefer()));
|
|
aData.mObserver->StyleSheetLoaded(aData.mSheet, aData.ShouldDefer(),
|
|
aStatus);
|
|
}
|
|
|
|
for (nsCOMPtr<nsICSSLoaderObserver> obs : mObservers.ForwardRange()) {
|
|
LOG((" Notifying global observer %p for data %p. deferred: %d",
|
|
obs.get(), &aData, aData.ShouldDefer()));
|
|
obs->StyleSheetLoaded(aData.mSheet, aData.ShouldDefer(), aStatus);
|
|
}
|
|
}
|
|
|
|
if (mPendingLoadCount && mPendingLoadCount == mOngoingLoadCount) {
|
|
LOG((" No more loading sheets; starting deferred loads"));
|
|
StartDeferredLoads();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* SheetComplete is the do-it-all cleanup function. It removes the
|
|
* load data from the "loading" hashtable, adds the sheet to the
|
|
* "completed" hashtable, massages the XUL cache, handles siblings of
|
|
* the load data (other loads for the same URI), handles unblocking
|
|
* blocked parent loads as needed, and most importantly calls
|
|
* NS_RELEASE on the load data to destroy the whole mess.
|
|
*/
|
|
void Loader::SheetComplete(SheetLoadData& aLoadData, nsresult aStatus) {
|
|
LOG(("css::Loader::SheetComplete, status: 0x%" PRIx32,
|
|
static_cast<uint32_t>(aStatus)));
|
|
SharedStyleSheetCache::LoadCompleted(mSheets.get(), aLoadData, aStatus);
|
|
}
|
|
|
|
// static
|
|
void Loader::MarkLoadTreeFailed(SheetLoadData& aLoadData,
|
|
Loader* aOnlyForLoader) {
|
|
if (aLoadData.mURI) {
|
|
LOG_URI(" Load failed: '%s'", aLoadData.mURI);
|
|
}
|
|
|
|
SheetLoadData* data = &aLoadData;
|
|
do {
|
|
if (!aOnlyForLoader || aOnlyForLoader == data->mLoader) {
|
|
data->mLoadFailed = true;
|
|
data->mSheet->MaybeRejectReplacePromise();
|
|
}
|
|
|
|
if (data->mParentData) {
|
|
MarkLoadTreeFailed(*data->mParentData, aOnlyForLoader);
|
|
}
|
|
|
|
data = data->mNext;
|
|
} while (data);
|
|
}
|
|
|
|
RefPtr<StyleSheet> Loader::LookupInlineSheetInCache(const nsAString& aBuffer) {
|
|
auto result = mInlineSheets.Lookup(aBuffer);
|
|
if (!result) {
|
|
return nullptr;
|
|
}
|
|
if (result.Data()->HasModifiedRules()) {
|
|
// Remove it now that we know that we're never going to use this stylesheet
|
|
// again.
|
|
result.Remove();
|
|
return nullptr;
|
|
}
|
|
return result.Data()->Clone(nullptr, nullptr, nullptr, nullptr);
|
|
}
|
|
|
|
void Loader::MaybeNotifyPreloadUsed(SheetLoadData& aData) {
|
|
if (!mDocument) {
|
|
return;
|
|
}
|
|
|
|
auto key = PreloadHashKey::CreateAsStyle(aData);
|
|
RefPtr<PreloaderBase> preload = mDocument->Preloads().LookupPreload(key);
|
|
if (!preload) {
|
|
return;
|
|
}
|
|
|
|
preload->NotifyUsage();
|
|
}
|
|
|
|
Result<Loader::LoadSheetResult, nsresult> Loader::LoadInlineStyle(
|
|
const SheetInfo& aInfo, const nsAString& aBuffer, uint32_t aLineNumber,
|
|
nsICSSLoaderObserver* aObserver) {
|
|
LOG(("css::Loader::LoadInlineStyle"));
|
|
MOZ_ASSERT(aInfo.mContent);
|
|
|
|
if (!mEnabled) {
|
|
LOG_WARN((" Not enabled"));
|
|
return Err(NS_ERROR_NOT_AVAILABLE);
|
|
}
|
|
|
|
if (!mDocument) {
|
|
return Err(NS_ERROR_NOT_INITIALIZED);
|
|
}
|
|
|
|
MOZ_ASSERT(LinkStyle::FromNodeOrNull(aInfo.mContent),
|
|
"Element is not a style linking element!");
|
|
|
|
// Since we're not planning to load a URI, no need to hand a principal to the
|
|
// load data or to CreateSheet().
|
|
|
|
// Check IsAlternateSheet now, since it can mutate our document.
|
|
auto isAlternate = IsAlternateSheet(aInfo.mTitle, aInfo.mHasAlternateRel);
|
|
LOG((" Sheet is alternate: %d", static_cast<int>(isAlternate)));
|
|
|
|
// Use the document's base URL so that @import in the inline sheet picks up
|
|
// the right base.
|
|
nsIURI* baseURI = aInfo.mContent->GetBaseURI();
|
|
nsIURI* sheetURI = aInfo.mContent->OwnerDoc()->GetDocumentURI();
|
|
nsIURI* originalURI = nullptr;
|
|
|
|
MOZ_ASSERT(aInfo.mIntegrity.IsEmpty());
|
|
|
|
nsIPrincipal* loadingPrincipal = LoaderPrincipal();
|
|
nsIPrincipal* principal = aInfo.mTriggeringPrincipal
|
|
? aInfo.mTriggeringPrincipal.get()
|
|
: loadingPrincipal;
|
|
|
|
// We only cache sheets if in shadow trees, since regular document sheets are
|
|
// likely to be unique.
|
|
const bool isWorthCaching = aInfo.mContent->IsInShadowTree();
|
|
RefPtr<StyleSheet> sheet;
|
|
if (isWorthCaching) {
|
|
sheet = LookupInlineSheetInCache(aBuffer);
|
|
}
|
|
const bool sheetFromCache = !!sheet;
|
|
if (!sheet) {
|
|
sheet = MakeRefPtr<StyleSheet>(eAuthorSheetFeatures, aInfo.mCORSMode,
|
|
SRIMetadata{});
|
|
sheet->SetURIs(sheetURI, originalURI, baseURI);
|
|
nsCOMPtr<nsIReferrerInfo> referrerInfo =
|
|
ReferrerInfo::CreateForInternalCSSResources(aInfo.mContent->OwnerDoc());
|
|
sheet->SetReferrerInfo(referrerInfo);
|
|
|
|
nsIPrincipal* sheetPrincipal = principal;
|
|
if (aInfo.mTriggeringPrincipal) {
|
|
// The triggering principal may be an expanded principal, which is safe to
|
|
// use for URL security checks, but not as the loader principal for a
|
|
// stylesheet. So treat this as principal inheritance, and downgrade if
|
|
// necessary.
|
|
sheetPrincipal =
|
|
BasePrincipal::Cast(aInfo.mTriggeringPrincipal)->PrincipalToInherit();
|
|
}
|
|
|
|
// We never actually load this, so just set its principal directly
|
|
sheet->SetPrincipal(sheetPrincipal);
|
|
}
|
|
|
|
auto matched = PrepareSheet(*sheet, aInfo.mTitle, aInfo.mMedia, nullptr,
|
|
isAlternate, aInfo.mIsExplicitlyEnabled);
|
|
|
|
if (auto* linkStyle = LinkStyle::FromNodeOrNull(aInfo.mContent)) {
|
|
linkStyle->SetStyleSheet(sheet);
|
|
}
|
|
if (StaticPrefs::dom_expose_incomplete_stylesheets() || sheet->IsComplete()) {
|
|
InsertSheetInTree(*sheet, aInfo.mContent);
|
|
}
|
|
|
|
Completed completed;
|
|
if (sheetFromCache) {
|
|
MOZ_ASSERT(sheet->IsComplete());
|
|
completed = Completed::Yes;
|
|
} else {
|
|
auto data = MakeRefPtr<SheetLoadData>(
|
|
this, aInfo.mTitle, nullptr, sheet, false, aInfo.mContent, isAlternate,
|
|
matched, IsPreload::No, aObserver, principal, aInfo.mReferrerInfo,
|
|
aInfo.mContent);
|
|
data->mLineNumber = aLineNumber;
|
|
|
|
// Parse completion releases the load data.
|
|
//
|
|
// Note that we need to parse synchronously, since the web expects that the
|
|
// effects of inline stylesheets are visible immediately (aside from
|
|
// @imports).
|
|
NS_ConvertUTF16toUTF8 utf8(aBuffer);
|
|
completed = ParseSheet(utf8, *data, AllowAsyncParse::No);
|
|
if (completed == Completed::Yes) {
|
|
// TODO(emilio): Try to cache sheets with @import rules, maybe?
|
|
if (isWorthCaching) {
|
|
mInlineSheets.Put(aBuffer, std::move(sheet));
|
|
}
|
|
} else {
|
|
data->mMustNotify = true;
|
|
}
|
|
}
|
|
|
|
return LoadSheetResult{completed, isAlternate, matched};
|
|
}
|
|
|
|
Result<Loader::LoadSheetResult, nsresult> Loader::LoadStyleLink(
|
|
const SheetInfo& aInfo, nsICSSLoaderObserver* aObserver) {
|
|
MOZ_ASSERT(aInfo.mURI, "Must have URL to load");
|
|
LOG(("css::Loader::LoadStyleLink"));
|
|
LOG_URI(" Link uri: '%s'", aInfo.mURI);
|
|
LOG((" Link title: '%s'", NS_ConvertUTF16toUTF8(aInfo.mTitle).get()));
|
|
LOG((" Link media: '%s'", NS_ConvertUTF16toUTF8(aInfo.mMedia).get()));
|
|
LOG((" Link alternate rel: %d", aInfo.mHasAlternateRel));
|
|
|
|
if (!mEnabled) {
|
|
LOG_WARN((" Not enabled"));
|
|
return Err(NS_ERROR_NOT_AVAILABLE);
|
|
}
|
|
|
|
if (!mDocument) {
|
|
return Err(NS_ERROR_NOT_INITIALIZED);
|
|
}
|
|
|
|
MOZ_ASSERT_IF(aInfo.mContent,
|
|
aInfo.mContent->NodePrincipal() == mDocument->NodePrincipal());
|
|
nsIPrincipal* loadingPrincipal = LoaderPrincipal();
|
|
nsIPrincipal* principal = aInfo.mTriggeringPrincipal
|
|
? aInfo.mTriggeringPrincipal.get()
|
|
: loadingPrincipal;
|
|
|
|
nsINode* context = aInfo.mContent;
|
|
if (!context) {
|
|
context = mDocument;
|
|
}
|
|
|
|
bool syncLoad = aInfo.mContent && aInfo.mContent->IsInUAWidget() &&
|
|
IsChromeURI(aInfo.mURI);
|
|
LOG((" Link sync load: '%s'", syncLoad ? "true" : "false"));
|
|
MOZ_ASSERT_IF(syncLoad, !aObserver);
|
|
|
|
nsresult rv = CheckContentPolicy(loadingPrincipal, principal, aInfo.mURI,
|
|
context, aInfo.mNonce, IsPreload::No);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
// Don't fire the error event if our document is loaded as data. We're
|
|
// supposed to not even try to do loads in that case... Unfortunately, we
|
|
// implement that via nsDataDocumentContentPolicy, which doesn't have a good
|
|
// way to communicate back to us that _it_ is the thing that blocked the
|
|
// load.
|
|
if (aInfo.mContent && !mDocument->IsLoadedAsData()) {
|
|
// Fire an async error event on it.
|
|
RefPtr<AsyncEventDispatcher> loadBlockingAsyncDispatcher =
|
|
new LoadBlockingAsyncEventDispatcher(aInfo.mContent, u"error"_ns,
|
|
CanBubble::eNo,
|
|
ChromeOnlyDispatch::eNo);
|
|
loadBlockingAsyncDispatcher->PostDOMEvent();
|
|
}
|
|
return Err(rv);
|
|
}
|
|
|
|
// Check IsAlternateSheet now, since it can mutate our document and make
|
|
// pending sheets go to the non-pending state.
|
|
auto isAlternate = IsAlternateSheet(aInfo.mTitle, aInfo.mHasAlternateRel);
|
|
auto [sheet, state] =
|
|
CreateSheet(aInfo, eAuthorSheetFeatures, syncLoad, IsPreload::No);
|
|
|
|
LOG((" Sheet is alternate: %d", static_cast<int>(isAlternate)));
|
|
|
|
auto matched = PrepareSheet(*sheet, aInfo.mTitle, aInfo.mMedia, nullptr,
|
|
isAlternate, aInfo.mIsExplicitlyEnabled);
|
|
|
|
if (auto* linkStyle = LinkStyle::FromNodeOrNull(aInfo.mContent)) {
|
|
linkStyle->SetStyleSheet(sheet);
|
|
}
|
|
if (StaticPrefs::dom_expose_incomplete_stylesheets() || sheet->IsComplete()) {
|
|
InsertSheetInTree(*sheet, aInfo.mContent);
|
|
}
|
|
|
|
// We may get here with no content for Link: headers for example.
|
|
MOZ_ASSERT(!aInfo.mContent || LinkStyle::FromNode(*aInfo.mContent),
|
|
"If there is any node, it should be a LinkStyle");
|
|
auto data = MakeRefPtr<SheetLoadData>(
|
|
this, aInfo.mTitle, aInfo.mURI, sheet, syncLoad, aInfo.mContent,
|
|
isAlternate, matched, IsPreload::No, aObserver, principal,
|
|
aInfo.mReferrerInfo, context);
|
|
|
|
MaybeNotifyPreloadUsed(*data);
|
|
|
|
if (state == SheetState::Complete) {
|
|
LOG((" Sheet already complete: 0x%p", sheet.get()));
|
|
if (aObserver || !mObservers.IsEmpty() || aInfo.mContent) {
|
|
rv = PostLoadEvent(std::move(data));
|
|
if (NS_FAILED(rv)) {
|
|
return Err(rv);
|
|
}
|
|
} else {
|
|
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
|
|
// We don't have to notify anyone of this load, as it was complete, so
|
|
// drop it intentionally.
|
|
data->mIntentionallyDropped = true;
|
|
#endif
|
|
}
|
|
|
|
// The load hasn't been completed yet, will be done in PostLoadEvent.
|
|
return LoadSheetResult{Completed::No, isAlternate, matched};
|
|
}
|
|
|
|
// Now we need to actually load it.
|
|
auto result = LoadSheetResult{Completed::No, isAlternate, matched};
|
|
|
|
MOZ_ASSERT(result.ShouldBlock() == !data->ShouldDefer(),
|
|
"These should better match!");
|
|
|
|
// Load completion will free the data
|
|
rv = LoadSheet(*data, state);
|
|
if (NS_FAILED(rv)) {
|
|
return Err(rv);
|
|
}
|
|
|
|
if (!syncLoad) {
|
|
data->mMustNotify = true;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static bool HaveAncestorDataWithURI(SheetLoadData& aData, nsIURI* aURI) {
|
|
if (!aData.mURI) {
|
|
// Inline style; this won't have any ancestors
|
|
MOZ_ASSERT(!aData.mParentData, "How does inline style have a parent?");
|
|
return false;
|
|
}
|
|
|
|
bool equal;
|
|
if (NS_FAILED(aData.mURI->Equals(aURI, &equal)) || equal) {
|
|
return true;
|
|
}
|
|
|
|
// Datas down the mNext chain have the same URI as aData, so we
|
|
// don't have to compare to them. But they might have different
|
|
// parents, and we have to check all of those.
|
|
SheetLoadData* data = &aData;
|
|
do {
|
|
if (data->mParentData &&
|
|
HaveAncestorDataWithURI(*data->mParentData, aURI)) {
|
|
return true;
|
|
}
|
|
|
|
data = data->mNext;
|
|
} while (data);
|
|
|
|
return false;
|
|
}
|
|
|
|
nsresult Loader::LoadChildSheet(StyleSheet& aParentSheet,
|
|
SheetLoadData* aParentData, nsIURI* aURL,
|
|
dom::MediaList* aMedia,
|
|
LoaderReusableStyleSheets* aReusableSheets) {
|
|
LOG(("css::Loader::LoadChildSheet"));
|
|
MOZ_ASSERT(aURL, "Must have a URI to load");
|
|
|
|
if (!mEnabled) {
|
|
LOG_WARN((" Not enabled"));
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
LOG_URI(" Child uri: '%s'", aURL);
|
|
|
|
nsCOMPtr<nsINode> owningNode;
|
|
|
|
// Check for an associated document or shadow root: if none, don't bother
|
|
// walking up the parent sheets.
|
|
if (aParentSheet.GetAssociatedDocumentOrShadowRoot()) {
|
|
StyleSheet* topSheet = &aParentSheet;
|
|
while (StyleSheet* parent = topSheet->GetParentSheet()) {
|
|
topSheet = parent;
|
|
}
|
|
owningNode = topSheet->GetOwnerNode();
|
|
}
|
|
|
|
nsINode* context = nullptr;
|
|
if (owningNode) {
|
|
context = owningNode;
|
|
MOZ_ASSERT(LoaderPrincipal() == owningNode->NodePrincipal());
|
|
} else if (mDocument) {
|
|
context = mDocument;
|
|
}
|
|
|
|
nsIPrincipal* principal = aParentSheet.Principal();
|
|
nsresult rv = CheckContentPolicy(LoaderPrincipal(), principal, aURL, context,
|
|
u""_ns, IsPreload::No);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
if (aParentData) {
|
|
MarkLoadTreeFailed(*aParentData);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
nsCOMPtr<nsICSSLoaderObserver> observer;
|
|
|
|
if (aParentData) {
|
|
LOG((" Have a parent load"));
|
|
// Check for cycles
|
|
if (HaveAncestorDataWithURI(*aParentData, aURL)) {
|
|
// Houston, we have a loop, blow off this child and pretend this never
|
|
// happened
|
|
LOG_ERROR((" @import cycle detected, dropping load"));
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_ASSERTION(aParentData->mSheet == &aParentSheet,
|
|
"Unexpected call to LoadChildSheet");
|
|
} else {
|
|
LOG((" No parent load; must be CSSOM"));
|
|
// No parent load data, so the sheet will need to be notified when
|
|
// we finish, if it can be, if we do the load asynchronously.
|
|
observer = &aParentSheet;
|
|
}
|
|
|
|
// Now that we know it's safe to load this (passes security check and not a
|
|
// loop) do so.
|
|
RefPtr<StyleSheet> sheet;
|
|
SheetState state;
|
|
if (aReusableSheets && aReusableSheets->FindReusableStyleSheet(aURL, sheet)) {
|
|
state = SheetState::Complete;
|
|
} else {
|
|
// For now, use CORS_NONE for child sheets
|
|
std::tie(sheet, state) =
|
|
CreateSheet(aURL, nullptr, principal, aParentSheet.ParsingMode(),
|
|
CORS_NONE, aParentData ? aParentData->mEncoding : nullptr,
|
|
u""_ns, // integrity is only checked on main sheet
|
|
aParentData && aParentData->mSyncLoad, IsPreload::No);
|
|
PrepareSheet(*sheet, u""_ns, u""_ns, aMedia, IsAlternate::No,
|
|
IsExplicitlyEnabled::No);
|
|
}
|
|
|
|
MOZ_ASSERT(sheet);
|
|
InsertChildSheet(*sheet, aParentSheet);
|
|
|
|
auto data = MakeRefPtr<SheetLoadData>(
|
|
this, aURL, sheet, aParentData, observer, principal,
|
|
aParentSheet.GetReferrerInfo(), context);
|
|
|
|
MaybeNotifyPreloadUsed(*data);
|
|
|
|
if (state == SheetState::Complete) {
|
|
LOG((" Sheet already complete"));
|
|
// We're completely done. No need to notify, even, since the
|
|
// @import rule addition/modification will trigger the right style
|
|
// changes automatically.
|
|
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
|
|
data->mIntentionallyDropped = true;
|
|
#endif
|
|
return NS_OK;
|
|
}
|
|
|
|
bool syncLoad = data->mSyncLoad;
|
|
|
|
// Load completion will release the data
|
|
rv = LoadSheet(*data, state);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (!syncLoad) {
|
|
data->mMustNotify = true;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
Result<RefPtr<StyleSheet>, nsresult> Loader::LoadSheetSync(
|
|
nsIURI* aURL, SheetParsingMode aParsingMode,
|
|
UseSystemPrincipal aUseSystemPrincipal) {
|
|
LOG(("css::Loader::LoadSheetSync"));
|
|
nsCOMPtr<nsIReferrerInfo> referrerInfo = new ReferrerInfo(nullptr);
|
|
return InternalLoadNonDocumentSheet(aURL, IsPreload::No, aParsingMode,
|
|
aUseSystemPrincipal, nullptr,
|
|
referrerInfo, nullptr, CORS_NONE, u""_ns);
|
|
}
|
|
|
|
Result<RefPtr<StyleSheet>, nsresult> Loader::LoadSheet(
|
|
nsIURI* aURI, SheetParsingMode aParsingMode,
|
|
UseSystemPrincipal aUseSystemPrincipal, nsICSSLoaderObserver* aObserver) {
|
|
nsCOMPtr<nsIReferrerInfo> referrerInfo = new ReferrerInfo(nullptr);
|
|
return InternalLoadNonDocumentSheet(
|
|
aURI, IsPreload::No, aParsingMode, aUseSystemPrincipal, nullptr,
|
|
referrerInfo, aObserver, CORS_NONE, u""_ns);
|
|
}
|
|
|
|
Result<RefPtr<StyleSheet>, nsresult> Loader::LoadSheet(
|
|
nsIURI* aURL, IsPreload aIsPreload, const Encoding* aPreloadEncoding,
|
|
nsIReferrerInfo* aReferrerInfo, nsICSSLoaderObserver* aObserver,
|
|
CORSMode aCORSMode, const nsAString& aIntegrity) {
|
|
LOG(("css::Loader::LoadSheet(aURL, aObserver) api call"));
|
|
return InternalLoadNonDocumentSheet(
|
|
aURL, aIsPreload, eAuthorSheetFeatures, UseSystemPrincipal::No,
|
|
aPreloadEncoding, aReferrerInfo, aObserver, aCORSMode, aIntegrity);
|
|
}
|
|
|
|
Result<RefPtr<StyleSheet>, nsresult> Loader::InternalLoadNonDocumentSheet(
|
|
nsIURI* aURL, IsPreload aIsPreload, SheetParsingMode aParsingMode,
|
|
UseSystemPrincipal aUseSystemPrincipal, const Encoding* aPreloadEncoding,
|
|
nsIReferrerInfo* aReferrerInfo, nsICSSLoaderObserver* aObserver,
|
|
CORSMode aCORSMode, const nsAString& aIntegrity) {
|
|
MOZ_ASSERT(aURL, "Must have a URI to load");
|
|
MOZ_ASSERT(aUseSystemPrincipal == UseSystemPrincipal::No || !aObserver,
|
|
"Shouldn't load system-principal sheets async");
|
|
MOZ_ASSERT(aReferrerInfo, "Must have referrerInfo");
|
|
|
|
LOG_URI(" Non-document sheet uri: '%s'", aURL);
|
|
|
|
if (!mEnabled) {
|
|
LOG_WARN((" Not enabled"));
|
|
return Err(NS_ERROR_NOT_AVAILABLE);
|
|
}
|
|
|
|
nsIPrincipal* loadingPrincipal = LoaderPrincipal();
|
|
nsIPrincipal* triggeringPrincipal = loadingPrincipal;
|
|
nsresult rv = CheckContentPolicy(loadingPrincipal, triggeringPrincipal, aURL,
|
|
mDocument, u""_ns, aIsPreload);
|
|
if (NS_FAILED(rv)) {
|
|
return Err(rv);
|
|
}
|
|
|
|
bool syncLoad = !aObserver;
|
|
auto [sheet, state] =
|
|
CreateSheet(aURL, nullptr, triggeringPrincipal, aParsingMode, aCORSMode,
|
|
aPreloadEncoding, aIntegrity, syncLoad, aIsPreload);
|
|
|
|
PrepareSheet(*sheet, u""_ns, u""_ns, nullptr, IsAlternate::No,
|
|
IsExplicitlyEnabled::No);
|
|
|
|
auto data = MakeRefPtr<SheetLoadData>(
|
|
this, aURL, sheet, syncLoad, aUseSystemPrincipal, aIsPreload,
|
|
aPreloadEncoding, aObserver, triggeringPrincipal, aReferrerInfo,
|
|
mDocument);
|
|
if (state == SheetState::Complete) {
|
|
LOG((" Sheet already complete"));
|
|
if (aObserver || !mObservers.IsEmpty()) {
|
|
rv = PostLoadEvent(std::move(data));
|
|
if (NS_FAILED(rv)) {
|
|
return Err(rv);
|
|
}
|
|
} else {
|
|
// We don't have to notify anyone of this load, as it was complete, so
|
|
// drop it intentionally.
|
|
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
|
|
data->mIntentionallyDropped = true;
|
|
#endif
|
|
}
|
|
return sheet;
|
|
}
|
|
|
|
rv = LoadSheet(*data, state);
|
|
if (NS_FAILED(rv)) {
|
|
return Err(rv);
|
|
}
|
|
if (aObserver) {
|
|
data->mMustNotify = true;
|
|
}
|
|
return sheet;
|
|
}
|
|
|
|
nsresult Loader::PostLoadEvent(RefPtr<SheetLoadData> aLoadData) {
|
|
LOG(("css::Loader::PostLoadEvent"));
|
|
mPostedEvents.AppendElement(aLoadData);
|
|
|
|
nsresult rv;
|
|
RefPtr<SheetLoadData> runnable(aLoadData);
|
|
if (mDocument) {
|
|
rv = mDocument->Dispatch(TaskCategory::Other, runnable.forget());
|
|
} else if (mDocGroup) {
|
|
rv = mDocGroup->Dispatch(TaskCategory::Other, runnable.forget());
|
|
} else {
|
|
rv = SchedulerGroup::Dispatch(TaskCategory::Other, runnable.forget());
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
NS_WARNING("failed to dispatch stylesheet load event");
|
|
mPostedEvents.RemoveElement(aLoadData);
|
|
} else {
|
|
if (aLoadData->BlocksLoadEvent()) {
|
|
IncrementOngoingLoadCount();
|
|
}
|
|
|
|
// We want to notify the observer for this data.
|
|
aLoadData->mMustNotify = true;
|
|
aLoadData->mSheetAlreadyComplete = true;
|
|
|
|
// If we get to this code, aSheet loaded correctly at some point, so
|
|
// we can just schedule a load event and don't need to touch the
|
|
// data's mLoadFailed. Note that we do this here and not from
|
|
// inside our SheetComplete so that we don't end up running the load
|
|
// event async.
|
|
MOZ_ASSERT(!aLoadData->mLoadFailed, "Why are we marked as failed?");
|
|
aLoadData->ScheduleLoadEventIfNeeded();
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
void Loader::HandleLoadEvent(SheetLoadData& aEvent) {
|
|
// XXXbz can't assert this yet.... May not have an observer because
|
|
// we're unblocking the parser
|
|
// NS_ASSERTION(aEvent->mObserver, "Must have observer");
|
|
NS_ASSERTION(aEvent.mSheet, "Must have sheet");
|
|
|
|
mPostedEvents.RemoveElement(&aEvent);
|
|
SheetComplete(aEvent, NS_OK);
|
|
}
|
|
|
|
void Loader::Stop() {
|
|
if (mSheets) {
|
|
mSheets->CancelLoadsForLoader(*this);
|
|
}
|
|
|
|
auto arr = std::move(mPostedEvents);
|
|
for (auto& data : arr) {
|
|
data->mIsCancelled = true;
|
|
}
|
|
}
|
|
|
|
bool Loader::HasPendingLoads() { return mOngoingLoadCount; }
|
|
|
|
void Loader::AddObserver(nsICSSLoaderObserver* aObserver) {
|
|
MOZ_ASSERT(aObserver, "Must have observer");
|
|
mObservers.AppendElementUnlessExists(aObserver);
|
|
}
|
|
|
|
void Loader::RemoveObserver(nsICSSLoaderObserver* aObserver) {
|
|
mObservers.RemoveElement(aObserver);
|
|
}
|
|
|
|
void Loader::StartDeferredLoads() {
|
|
if (mSheets && mPendingLoadCount) {
|
|
mSheets->StartDeferredLoadsForLoader(
|
|
*this, SharedStyleSheetCache::StartLoads::Always);
|
|
}
|
|
}
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_CLASS(Loader)
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Loader)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSheets);
|
|
for (auto iter = tmp->mInlineSheets.Iter(); !iter.Done(); iter.Next()) {
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "Inline sheet cache in Loader");
|
|
cb.NoteXPCOMChild(iter.UserData());
|
|
}
|
|
for (nsCOMPtr<nsICSSLoaderObserver>& obs : tmp->mObservers.ForwardRange()) {
|
|
ImplCycleCollectionTraverse(cb, obs, "mozilla::css::Loader.mObservers");
|
|
}
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Loader)
|
|
if (tmp->mSheets) {
|
|
if (tmp->mDocument) {
|
|
tmp->DeregisterFromSheetCache();
|
|
}
|
|
tmp->mSheets = nullptr;
|
|
}
|
|
tmp->mInlineSheets.Clear();
|
|
tmp->mObservers.Clear();
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(Loader, AddRef)
|
|
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(Loader, Release)
|
|
|
|
size_t Loader::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
|
|
size_t n = aMallocSizeOf(this);
|
|
|
|
n += mObservers.ShallowSizeOfExcludingThis(aMallocSizeOf);
|
|
|
|
n += mInlineSheets.ShallowSizeOfExcludingThis(aMallocSizeOf);
|
|
for (auto iter = mInlineSheets.ConstIter(); !iter.Done(); iter.Next()) {
|
|
n += iter.Key().SizeOfExcludingThisIfUnshared(aMallocSizeOf);
|
|
// If the sheet has a parent, then its parent will report it so we don't
|
|
// have to worry about it here.
|
|
const StyleSheet* sheet = iter.UserData();
|
|
MOZ_ASSERT(!sheet->GetParentSheet(),
|
|
"How did an @import rule end up here?");
|
|
if (!sheet->GetOwnerNode()) {
|
|
n += sheet->SizeOfIncludingThis(aMallocSizeOf);
|
|
}
|
|
}
|
|
|
|
// Measurement of the following members may be added later if DMD finds it is
|
|
// worthwhile:
|
|
// - mPostedEvents: transient, and should be small
|
|
//
|
|
// The following members aren't measured:
|
|
// - mDocument, because it's a weak backpointer
|
|
|
|
return n;
|
|
}
|
|
|
|
nsIPrincipal* Loader::LoaderPrincipal() const {
|
|
if (mDocument) {
|
|
return mDocument->NodePrincipal();
|
|
}
|
|
// Loaders without a document do system loads.
|
|
return nsContentUtils::GetSystemPrincipal();
|
|
}
|
|
|
|
nsIPrincipal* Loader::PartitionedPrincipal() const {
|
|
if (mDocument && StaticPrefs::privacy_partition_network_state()) {
|
|
return mDocument->PartitionedPrincipal();
|
|
}
|
|
return LoaderPrincipal();
|
|
}
|
|
|
|
bool Loader::ShouldBypassCache() const {
|
|
if (!mDocument) {
|
|
return false;
|
|
}
|
|
RefPtr<nsILoadGroup> lg = mDocument->GetDocumentLoadGroup();
|
|
if (!lg) {
|
|
return false;
|
|
}
|
|
nsLoadFlags flags;
|
|
if (NS_FAILED(lg->GetLoadFlags(&flags))) {
|
|
return false;
|
|
}
|
|
return flags & (nsIRequest::LOAD_BYPASS_CACHE |
|
|
nsICachingChannel::LOAD_BYPASS_LOCAL_CACHE);
|
|
}
|
|
|
|
void Loader::BlockOnload() {
|
|
if (mDocument) {
|
|
mDocument->BlockOnload();
|
|
}
|
|
}
|
|
|
|
void Loader::UnblockOnload(bool aFireSync) {
|
|
if (mDocument) {
|
|
mDocument->UnblockOnload(aFireSync);
|
|
}
|
|
}
|
|
|
|
already_AddRefed<nsISerialEventTarget> Loader::DispatchTarget() {
|
|
nsCOMPtr<nsISerialEventTarget> target;
|
|
if (mDocument) {
|
|
// If you change this, you may want to change StyleSheet::Replace
|
|
target = mDocument->EventTargetFor(TaskCategory::Other);
|
|
} else if (mDocGroup) {
|
|
target = mDocGroup->EventTargetFor(TaskCategory::Other);
|
|
} else {
|
|
target = GetMainThreadSerialEventTarget();
|
|
}
|
|
|
|
return target.forget();
|
|
}
|
|
|
|
} // namespace css
|
|
} // namespace mozilla
|