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-rw-r--r--layout/style/FontFaceSetDocumentImpl.cpp762
1 files changed, 762 insertions, 0 deletions
diff --git a/layout/style/FontFaceSetDocumentImpl.cpp b/layout/style/FontFaceSetDocumentImpl.cpp
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+++ b/layout/style/FontFaceSetDocumentImpl.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "FontFaceSetDocumentImpl.h"
+#include "FontPreloader.h"
+#include "mozilla/LoadInfo.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/PresShellInlines.h"
+#include "mozilla/css/Loader.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/DocumentInlines.h"
+#include "mozilla/dom/Event.h"
+#include "mozilla/dom/FontFaceImpl.h"
+#include "mozilla/dom/FontFaceSet.h"
+#include "nsContentPolicyUtils.h"
+#include "nsDOMNavigationTiming.h"
+#include "nsFontFaceLoader.h"
+#include "nsIDocShell.h"
+#include "nsINetworkPredictor.h"
+#include "nsIWebNavigation.h"
+#include "nsPresContext.h"
+
+using namespace mozilla;
+using namespace mozilla::css;
+using namespace mozilla::dom;
+
+#define LOG(args) \
+ MOZ_LOG(gfxUserFontSet::GetUserFontsLog(), mozilla::LogLevel::Debug, args)
+#define LOG_ENABLED() \
+ MOZ_LOG_TEST(gfxUserFontSet::GetUserFontsLog(), LogLevel::Debug)
+
+NS_IMPL_ISUPPORTS_INHERITED(FontFaceSetDocumentImpl, FontFaceSetImpl,
+ nsIDOMEventListener, nsICSSLoaderObserver)
+
+FontFaceSetDocumentImpl::FontFaceSetDocumentImpl(FontFaceSet* aOwner,
+ dom::Document* aDocument)
+ : FontFaceSetImpl(aOwner), mDocument(aDocument) {}
+
+FontFaceSetDocumentImpl::~FontFaceSetDocumentImpl() = default;
+
+void FontFaceSetDocumentImpl::Initialize() {
+ RecursiveMutexAutoLock lock(mMutex);
+
+ MOZ_ASSERT(mDocument, "We should get a valid document from the caller!");
+
+ // Record the state of the "bypass cache" flags from the docshell now,
+ // since we want to look at them from style worker threads, and we can
+ // only get to the docshell through a weak pointer (which is only
+ // possible on the main thread).
+ //
+ // In theory the load type of a docshell could change after the document
+ // is loaded, but handling that doesn't seem too important.
+ if (nsCOMPtr<nsIDocShell> docShell = mDocument->GetDocShell()) {
+ uint32_t loadType;
+ uint32_t flags;
+ if ((NS_SUCCEEDED(docShell->GetLoadType(&loadType)) &&
+ ((loadType >> 16) & nsIWebNavigation::LOAD_FLAGS_BYPASS_CACHE)) ||
+ (NS_SUCCEEDED(docShell->GetDefaultLoadFlags(&flags)) &&
+ (flags & nsIRequest::LOAD_BYPASS_CACHE))) {
+ mBypassCache = true;
+ }
+ }
+
+ // Same for the "private browsing" flag.
+ if (nsCOMPtr<nsILoadContext> loadContext = mDocument->GetLoadContext()) {
+ mPrivateBrowsing = loadContext->UsePrivateBrowsing();
+ }
+
+ if (!mDocument->DidFireDOMContentLoaded()) {
+ mDocument->AddSystemEventListener(u"DOMContentLoaded"_ns, this, false,
+ false);
+ } else {
+ // In some cases we can't rely on CheckLoadingFinished being called from
+ // the refresh driver. For example, documents in display:none iframes.
+ // Or if the document has finished loading and painting at the time that
+ // script requests document.fonts and causes us to get here.
+ CheckLoadingFinished();
+ }
+
+ mDocument->CSSLoader()->AddObserver(this);
+
+ mStandardFontLoadPrincipal = MakeRefPtr<gfxFontSrcPrincipal>(
+ mDocument->NodePrincipal(), mDocument->PartitionedPrincipal());
+}
+
+void FontFaceSetDocumentImpl::Destroy() {
+ RemoveDOMContentLoadedListener();
+
+ if (mDocument && mDocument->CSSLoader()) {
+ // We're null checking CSSLoader() since FontFaceSetImpl::Disconnect() might
+ // be being called during unlink, at which time the loader may already have
+ // been unlinked from the document.
+ mDocument->CSSLoader()->RemoveObserver(this);
+ }
+
+ mRuleFaces.Clear();
+
+ // Since the base class may depend on the document remaining set, we need to
+ // clear mDocument after.
+ FontFaceSetImpl::Destroy();
+
+ mDocument = nullptr;
+}
+
+bool FontFaceSetDocumentImpl::IsOnOwningThread() { return NS_IsMainThread(); }
+
+#ifdef DEBUG
+void FontFaceSetDocumentImpl::AssertIsOnOwningThread() {
+ MOZ_ASSERT(NS_IsMainThread());
+}
+#endif
+
+void FontFaceSetDocumentImpl::DispatchToOwningThread(
+ const char* aName, std::function<void()>&& aFunc) {
+ class FontFaceSetDocumentRunnable final : public Runnable {
+ public:
+ FontFaceSetDocumentRunnable(const char* aName,
+ std::function<void()>&& aFunc)
+ : Runnable(aName), mFunc(std::move(aFunc)) {}
+
+ NS_IMETHOD Run() final {
+ mFunc();
+ return NS_OK;
+ }
+
+ private:
+ std::function<void()> mFunc;
+ };
+
+ RefPtr<FontFaceSetDocumentRunnable> runnable =
+ new FontFaceSetDocumentRunnable(aName, std::move(aFunc));
+ NS_DispatchToMainThread(runnable.forget());
+}
+
+uint64_t FontFaceSetDocumentImpl::GetInnerWindowID() {
+ MOZ_ASSERT(NS_IsMainThread());
+ if (!mDocument) {
+ return 0;
+ }
+
+ return mDocument->InnerWindowID();
+}
+
+nsPresContext* FontFaceSetDocumentImpl::GetPresContext() const {
+ mozilla::AssertIsMainThreadOrServoFontMetricsLocked();
+ if (!mDocument) {
+ return nullptr;
+ }
+
+ return mDocument->GetPresContext();
+}
+
+void FontFaceSetDocumentImpl::RefreshStandardFontLoadPrincipal() {
+ MOZ_ASSERT(NS_IsMainThread());
+ RecursiveMutexAutoLock lock(mMutex);
+ if (NS_WARN_IF(!mDocument)) {
+ return;
+ }
+ mStandardFontLoadPrincipal = MakeRefPtr<gfxFontSrcPrincipal>(
+ mDocument->NodePrincipal(), mDocument->PartitionedPrincipal());
+ FontFaceSetImpl::RefreshStandardFontLoadPrincipal();
+}
+
+already_AddRefed<URLExtraData> FontFaceSetDocumentImpl::GetURLExtraData() {
+ if (!mDocument) {
+ return nullptr;
+ }
+ return do_AddRef(mDocument->DefaultStyleAttrURLData());
+}
+
+void FontFaceSetDocumentImpl::RemoveDOMContentLoadedListener() {
+ if (mDocument) {
+ mDocument->RemoveSystemEventListener(u"DOMContentLoaded"_ns, this, false);
+ }
+}
+
+void FontFaceSetDocumentImpl::FindMatchingFontFaces(
+ const nsTHashSet<FontFace*>& aMatchingFaces,
+ nsTArray<FontFace*>& aFontFaces) {
+ FontFaceSetImpl::FindMatchingFontFaces(aMatchingFaces, aFontFaces);
+ for (FontFaceRecord& record : mRuleFaces) {
+ FontFace* owner = record.mFontFace->GetOwner();
+ if (owner && aMatchingFaces.Contains(owner)) {
+ aFontFaces.AppendElement(owner);
+ }
+ }
+}
+
+TimeStamp FontFaceSetDocumentImpl::GetNavigationStartTimeStamp() {
+ TimeStamp navStart;
+ RefPtr<nsDOMNavigationTiming> timing(mDocument->GetNavigationTiming());
+ if (timing) {
+ navStart = timing->GetNavigationStartTimeStamp();
+ }
+ return navStart;
+}
+
+void FontFaceSetDocumentImpl::EnsureReady() {
+ MOZ_ASSERT(NS_IsMainThread());
+
+ // There may be outstanding style changes that will trigger the loading of
+ // new fonts. We need to flush layout to initiate any such loads so that
+ // if mReady is currently resolved we replace it with a new pending Promise.
+ // (That replacement will happen under this flush call.)
+ if (!ReadyPromiseIsPending() && mDocument) {
+ mDocument->FlushPendingNotifications(FlushType::Layout);
+ }
+}
+
+#ifdef DEBUG
+bool FontFaceSetDocumentImpl::HasRuleFontFace(FontFaceImpl* aFontFace) {
+ for (size_t i = 0; i < mRuleFaces.Length(); i++) {
+ if (mRuleFaces[i].mFontFace == aFontFace) {
+ return true;
+ }
+ }
+ return false;
+}
+#endif
+
+bool FontFaceSetDocumentImpl::Add(FontFaceImpl* aFontFace, ErrorResult& aRv) {
+ if (NS_WARN_IF(!mDocument)) {
+ return false;
+ }
+
+ if (!FontFaceSetImpl::Add(aFontFace, aRv)) {
+ return false;
+ }
+
+ RefPtr<dom::Document> clonedDoc = mDocument->GetLatestStaticClone();
+ if (clonedDoc) {
+ // The document is printing, copy the font to the static clone as well.
+ nsCOMPtr<nsIPrincipal> principal = mDocument->GetPrincipal();
+ if (principal->IsSystemPrincipal() || nsContentUtils::IsPDFJS(principal)) {
+ ErrorResult rv;
+ clonedDoc->Fonts()->Add(*aFontFace->GetOwner(), rv);
+ MOZ_ASSERT(!rv.Failed());
+ }
+ }
+
+ return true;
+}
+
+nsresult FontFaceSetDocumentImpl::StartLoad(gfxUserFontEntry* aUserFontEntry,
+ uint32_t aSrcIndex) {
+ if (NS_WARN_IF(!mDocument)) {
+ return NS_ERROR_FAILURE;
+ }
+
+ nsresult rv;
+
+ nsCOMPtr<nsIStreamLoader> streamLoader;
+ RefPtr<nsFontFaceLoader> fontLoader;
+
+ const gfxFontFaceSrc& src = aUserFontEntry->SourceAt(aSrcIndex);
+
+ auto preloadKey =
+ PreloadHashKey::CreateAsFont(src.mURI->get(), CORS_ANONYMOUS);
+ RefPtr<PreloaderBase> preload =
+ mDocument->Preloads().LookupPreload(preloadKey);
+
+ if (preload) {
+ fontLoader = new nsFontFaceLoader(aUserFontEntry, aSrcIndex, this,
+ preload->Channel());
+ rv = NS_NewStreamLoader(getter_AddRefs(streamLoader), fontLoader,
+ fontLoader);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ rv = preload->AsyncConsume(streamLoader);
+
+ // We don't want this to hang around regardless of the result, there will be
+ // no coalescing of later found <link preload> tags for fonts.
+ preload->RemoveSelf(mDocument);
+ } else {
+ // No preload found, open a channel.
+ rv = NS_ERROR_FAILURE;
+ }
+
+ nsCOMPtr<nsILoadGroup> loadGroup(mDocument->GetDocumentLoadGroup());
+ if (NS_FAILED(rv)) {
+ nsCOMPtr<nsIChannel> channel;
+ rv = FontPreloader::BuildChannel(
+ getter_AddRefs(channel), src.mURI->get(), CORS_ANONYMOUS,
+ dom::ReferrerPolicy::_empty /* not used */, aUserFontEntry, &src,
+ mDocument, loadGroup, nullptr, false);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ fontLoader = new nsFontFaceLoader(aUserFontEntry, aSrcIndex, this, channel);
+
+ if (LOG_ENABLED()) {
+ nsCOMPtr<nsIURI> referrer = src.mReferrerInfo
+ ? src.mReferrerInfo->GetOriginalReferrer()
+ : nullptr;
+ LOG((
+ "userfonts (%p) download start - font uri: (%s) referrer uri: (%s)\n",
+ fontLoader.get(), src.mURI->GetSpecOrDefault().get(),
+ referrer ? referrer->GetSpecOrDefault().get() : ""));
+ }
+
+ rv = NS_NewStreamLoader(getter_AddRefs(streamLoader), fontLoader,
+ fontLoader);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ rv = channel->AsyncOpen(streamLoader);
+ if (NS_FAILED(rv)) {
+ fontLoader->DropChannel(); // explicitly need to break ref cycle
+ }
+ }
+
+ {
+ RecursiveMutexAutoLock lock(mMutex);
+ mLoaders.PutEntry(fontLoader);
+ }
+
+ net::PredictorLearn(src.mURI->get(), mDocument->GetDocumentURI(),
+ nsINetworkPredictor::LEARN_LOAD_SUBRESOURCE, loadGroup);
+
+ if (NS_SUCCEEDED(rv)) {
+ fontLoader->StartedLoading(streamLoader);
+ // let the font entry remember the loader, in case we need to cancel it
+ aUserFontEntry->SetLoader(fontLoader);
+ }
+
+ return rv;
+}
+
+bool FontFaceSetDocumentImpl::IsFontLoadAllowed(const gfxFontFaceSrc& aSrc) {
+ MOZ_ASSERT(aSrc.mSourceType == gfxFontFaceSrc::eSourceType_URL);
+
+ if (ServoStyleSet::IsInServoTraversal()) {
+ RecursiveMutexAutoLock lock(mMutex);
+ auto entry = mAllowedFontLoads.Lookup(&aSrc);
+ MOZ_DIAGNOSTIC_ASSERT(entry, "Missed an update?");
+ return entry ? *entry : false;
+ }
+
+ MOZ_ASSERT(NS_IsMainThread());
+
+ if (aSrc.mUseOriginPrincipal) {
+ return true;
+ }
+
+ if (NS_WARN_IF(!mDocument)) {
+ return false;
+ }
+
+ RefPtr<gfxFontSrcPrincipal> gfxPrincipal =
+ aSrc.mURI->InheritsSecurityContext() ? nullptr
+ : aSrc.LoadPrincipal(*this);
+
+ nsIPrincipal* principal =
+ gfxPrincipal ? gfxPrincipal->NodePrincipal() : nullptr;
+
+ nsCOMPtr<nsILoadInfo> secCheckLoadInfo = new net::LoadInfo(
+ mDocument->NodePrincipal(), // loading principal
+ principal, // triggering principal
+ mDocument, nsILoadInfo::SEC_ONLY_FOR_EXPLICIT_CONTENTSEC_CHECK,
+ nsIContentPolicy::TYPE_FONT);
+
+ int16_t shouldLoad = nsIContentPolicy::ACCEPT;
+ nsresult rv = NS_CheckContentLoadPolicy(aSrc.mURI->get(), secCheckLoadInfo,
+ ""_ns, // mime type
+ &shouldLoad,
+ nsContentUtils::GetContentPolicy());
+
+ return NS_SUCCEEDED(rv) && NS_CP_ACCEPTED(shouldLoad);
+}
+
+nsresult FontFaceSetDocumentImpl::CreateChannelForSyncLoadFontData(
+ nsIChannel** aOutChannel, gfxUserFontEntry* aFontToLoad,
+ const gfxFontFaceSrc* aFontFaceSrc) {
+ gfxFontSrcPrincipal* principal = aFontToLoad->GetPrincipal();
+
+ // Note we are calling NS_NewChannelWithTriggeringPrincipal() with both a
+ // node and a principal. This is because the document where the font is
+ // being loaded might have a different origin from the principal of the
+ // stylesheet that initiated the font load.
+ // Further, we only get here for data: loads, so it doesn't really matter
+ // whether we use SEC_ALLOW_CROSS_ORIGIN_INHERITS_SEC_CONTEXT or not, to be
+ // more restrictive we use SEC_REQUIRE_SAME_ORIGIN_INHERITS_SEC_CONTEXT.
+ return NS_NewChannelWithTriggeringPrincipal(
+ aOutChannel, aFontFaceSrc->mURI->get(), mDocument,
+ principal ? principal->NodePrincipal() : nullptr,
+ nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_INHERITS_SEC_CONTEXT,
+ aFontFaceSrc->mUseOriginPrincipal ? nsIContentPolicy::TYPE_UA_FONT
+ : nsIContentPolicy::TYPE_FONT);
+}
+
+bool FontFaceSetDocumentImpl::UpdateRules(
+ const nsTArray<nsFontFaceRuleContainer>& aRules) {
+ RecursiveMutexAutoLock lock(mMutex);
+
+ // If there was a change to the mNonRuleFaces array, then there could
+ // have been a modification to the user font set.
+ bool modified = mNonRuleFacesDirty;
+ mNonRuleFacesDirty = false;
+
+ // reuse existing FontFace objects mapped to rules already
+ nsTHashMap<nsPtrHashKey<StyleLockedFontFaceRule>, FontFaceImpl*> ruleFaceMap;
+ for (size_t i = 0, i_end = mRuleFaces.Length(); i < i_end; ++i) {
+ FontFaceImpl* f = mRuleFaces[i].mFontFace;
+ if (!f || !f->GetOwner()) {
+ continue;
+ }
+ ruleFaceMap.InsertOrUpdate(f->GetRule(), f);
+ }
+
+ // The @font-face rules that make up the user font set have changed,
+ // so we need to update the set. However, we want to preserve existing
+ // font entries wherever possible, so that we don't discard and then
+ // re-download resources in the (common) case where at least some of the
+ // same rules are still present.
+
+ nsTArray<FontFaceRecord> oldRecords = std::move(mRuleFaces);
+
+ // Remove faces from the font family records; we need to re-insert them
+ // because we might end up with faces in a different order even if they're
+ // the same font entries as before. (The order can affect font selection
+ // where multiple faces match the requested style, perhaps with overlapping
+ // unicode-range coverage.)
+ for (const auto& fontFamily : mFontFamilies.Values()) {
+ fontFamily->DetachFontEntries();
+ }
+
+ // Sometimes aRules has duplicate @font-face rules in it; we should make
+ // that not happen, but in the meantime, don't try to insert the same
+ // FontFace object more than once into mRuleFaces. We track which
+ // ones we've handled in this table.
+ nsTHashSet<StyleLockedFontFaceRule*> handledRules;
+
+ for (size_t i = 0, i_end = aRules.Length(); i < i_end; ++i) {
+ // Insert each FontFace objects for each rule into our list, migrating old
+ // font entries if possible rather than creating new ones; set modified to
+ // true if we detect that rule ordering has changed, or if a new entry is
+ // created.
+ StyleLockedFontFaceRule* rule = aRules[i].mRule;
+ if (!handledRules.EnsureInserted(rule)) {
+ // rule was already present in the hashtable
+ continue;
+ }
+ RefPtr<FontFaceImpl> faceImpl = ruleFaceMap.Get(rule);
+ RefPtr<FontFace> face = faceImpl ? faceImpl->GetOwner() : nullptr;
+ if (mOwner && (!faceImpl || !face)) {
+ face = FontFace::CreateForRule(mOwner->GetParentObject(), mOwner, rule);
+ faceImpl = face->GetImpl();
+ }
+ InsertRuleFontFace(faceImpl, face, aRules[i].mOrigin, oldRecords, modified);
+ }
+
+ for (size_t i = 0, i_end = mNonRuleFaces.Length(); i < i_end; ++i) {
+ // Do the same for the non rule backed FontFace objects.
+ InsertNonRuleFontFace(mNonRuleFaces[i].mFontFace, modified);
+ }
+
+ // Remove any residual families that have no font entries (i.e., they were
+ // not defined at all by the updated set of @font-face rules).
+ for (auto it = mFontFamilies.Iter(); !it.Done(); it.Next()) {
+ if (!it.Data()->FontListLength()) {
+ it.Remove();
+ }
+ }
+
+ // If any FontFace objects for rules are left in the old list, note that the
+ // set has changed (even if the new set was built entirely by migrating old
+ // font entries).
+ if (oldRecords.Length() > 0) {
+ modified = true;
+ // Any in-progress loaders for obsolete rules should be cancelled,
+ // as the resource being downloaded will no longer be required.
+ // We need to explicitly remove any loaders here, otherwise the loaders
+ // will keep their "orphaned" font entries alive until they complete,
+ // even after the oldRules array is deleted.
+ //
+ // XXX Now that it is possible for the author to hold on to a rule backed
+ // FontFace object, we shouldn't cancel loading here; instead we should do
+ // it when the FontFace is GCed, if we can detect that.
+ size_t count = oldRecords.Length();
+ for (size_t i = 0; i < count; ++i) {
+ RefPtr<FontFaceImpl> f = oldRecords[i].mFontFace;
+ gfxUserFontEntry* userFontEntry = f->GetUserFontEntry();
+ if (userFontEntry) {
+ nsFontFaceLoader* loader = userFontEntry->GetLoader();
+ if (loader) {
+ loader->Cancel();
+ RemoveLoader(loader);
+ }
+ }
+
+ // Any left over FontFace objects should also cease being rule backed.
+ f->DisconnectFromRule();
+ }
+ }
+
+ if (modified) {
+ IncrementGeneration(true);
+ mHasLoadingFontFacesIsDirty = true;
+ CheckLoadingStarted();
+ CheckLoadingFinished();
+ }
+
+ // if local rules needed to be rebuilt, they have been rebuilt at this point
+ if (mRebuildLocalRules) {
+ mLocalRulesUsed = false;
+ mRebuildLocalRules = false;
+ }
+
+ if (LOG_ENABLED() && !mRuleFaces.IsEmpty()) {
+ LOG(("userfonts (%p) userfont rules update (%s) rule count: %d", this,
+ (modified ? "modified" : "not modified"), (int)(mRuleFaces.Length())));
+ }
+
+ return modified;
+}
+
+void FontFaceSetDocumentImpl::InsertRuleFontFace(
+ FontFaceImpl* aFontFace, FontFace* aFontFaceOwner, StyleOrigin aSheetType,
+ nsTArray<FontFaceRecord>& aOldRecords, bool& aFontSetModified) {
+ RecursiveMutexAutoLock lock(mMutex);
+
+ gfxUserFontAttributes attr;
+ if (!aFontFace->GetAttributes(attr)) {
+ // If there is no family name, this rule cannot contribute a
+ // usable font, so there is no point in processing it further.
+ return;
+ }
+
+ bool remove = false;
+ size_t removeIndex;
+
+ // This is a rule backed FontFace. First, we check in aOldRecords; if
+ // the FontFace for the rule exists there, just move it to the new record
+ // list, and put the entry into the appropriate family.
+ for (size_t i = 0; i < aOldRecords.Length(); ++i) {
+ FontFaceRecord& rec = aOldRecords[i];
+
+ if (rec.mFontFace == aFontFace && rec.mOrigin == Some(aSheetType)) {
+ // if local rules were used, don't use the old font entry
+ // for rules containing src local usage
+ if (mLocalRulesUsed && mRebuildLocalRules) {
+ if (aFontFace->HasLocalSrc()) {
+ // Remove the old record, but wait to see if we successfully create a
+ // new user font entry below.
+ remove = true;
+ removeIndex = i;
+ break;
+ }
+ }
+
+ gfxUserFontEntry* entry = rec.mFontFace->GetUserFontEntry();
+ MOZ_ASSERT(entry, "FontFace should have a gfxUserFontEntry by now");
+
+ AddUserFontEntry(attr.mFamilyName, entry);
+
+ MOZ_ASSERT(!HasRuleFontFace(rec.mFontFace),
+ "FontFace should not occur in mRuleFaces twice");
+
+ mRuleFaces.AppendElement(rec);
+ aOldRecords.RemoveElementAt(i);
+
+ if (mOwner && aFontFaceOwner) {
+ mOwner->InsertRuleFontFace(aFontFaceOwner, aSheetType);
+ }
+
+ // note the set has been modified if an old rule was skipped to find
+ // this one - something has been dropped, or ordering changed
+ if (i > 0) {
+ aFontSetModified = true;
+ }
+ return;
+ }
+ }
+
+ // this is a new rule:
+ nsAutoCString family(attr.mFamilyName);
+ RefPtr<gfxUserFontEntry> entry = FindOrCreateUserFontEntryFromFontFace(
+ aFontFace, std::move(attr), aSheetType);
+
+ if (!entry) {
+ return;
+ }
+
+ if (remove) {
+ // Although we broke out of the aOldRecords loop above, since we found
+ // src local usage, and we're not using the old user font entry, we still
+ // are adding a record to mRuleFaces with the same FontFace object.
+ // Remove the old record so that we don't have the same FontFace listed
+ // in both mRuleFaces and oldRecords, which would cause us to call
+ // DisconnectFromRule on a FontFace that should still be rule backed.
+ aOldRecords.RemoveElementAt(removeIndex);
+ }
+
+ FontFaceRecord rec;
+ rec.mFontFace = aFontFace;
+ rec.mOrigin = Some(aSheetType);
+
+ aFontFace->SetUserFontEntry(entry);
+
+ MOZ_ASSERT(!HasRuleFontFace(aFontFace),
+ "FontFace should not occur in mRuleFaces twice");
+
+ mRuleFaces.AppendElement(rec);
+
+ if (mOwner && aFontFaceOwner) {
+ mOwner->InsertRuleFontFace(aFontFaceOwner, aSheetType);
+ }
+
+ // this was a new rule and font entry, so note that the set was modified
+ aFontSetModified = true;
+
+ // Add the entry to the end of the list. If an existing userfont entry was
+ // returned by FindOrCreateUserFontEntryFromFontFace that was already stored
+ // on the family, gfxUserFontFamily::AddFontEntry(), which AddUserFontEntry
+ // calls, will automatically remove the earlier occurrence of the same
+ // userfont entry.
+ AddUserFontEntry(family, entry);
+}
+
+StyleLockedFontFaceRule* FontFaceSetDocumentImpl::FindRuleForEntry(
+ gfxFontEntry* aFontEntry) {
+ NS_ASSERTION(!aFontEntry->mIsUserFontContainer, "only platform font entries");
+ for (uint32_t i = 0; i < mRuleFaces.Length(); ++i) {
+ FontFaceImpl* f = mRuleFaces[i].mFontFace;
+ gfxUserFontEntry* entry = f->GetUserFontEntry();
+ if (entry && entry->GetPlatformFontEntry() == aFontEntry) {
+ return f->GetRule();
+ }
+ }
+ return nullptr;
+}
+
+StyleLockedFontFaceRule* FontFaceSetDocumentImpl::FindRuleForUserFontEntry(
+ gfxUserFontEntry* aUserFontEntry) {
+ for (uint32_t i = 0; i < mRuleFaces.Length(); ++i) {
+ FontFaceImpl* f = mRuleFaces[i].mFontFace;
+ if (f->GetUserFontEntry() == aUserFontEntry) {
+ return f->GetRule();
+ }
+ }
+ return nullptr;
+}
+
+void FontFaceSetDocumentImpl::CacheFontLoadability() {
+ RecursiveMutexAutoLock lock(mMutex);
+
+ // TODO(emilio): We could do it a bit more incrementally maybe?
+ for (const auto& fontFamily : mFontFamilies.Values()) {
+ fontFamily->ReadLock();
+ for (const gfxFontEntry* entry : fontFamily->GetFontList()) {
+ if (!entry->mIsUserFontContainer) {
+ continue;
+ }
+
+ const auto& sourceList =
+ static_cast<const gfxUserFontEntry*>(entry)->SourceList();
+ for (const gfxFontFaceSrc& src : sourceList) {
+ if (src.mSourceType != gfxFontFaceSrc::eSourceType_URL) {
+ continue;
+ }
+ mAllowedFontLoads.LookupOrInsertWith(
+ &src, [&] { return IsFontLoadAllowed(src); });
+ }
+ }
+ fontFamily->ReadUnlock();
+ }
+}
+
+void FontFaceSetDocumentImpl::DidRefresh() { CheckLoadingFinished(); }
+
+void FontFaceSetDocumentImpl::UpdateHasLoadingFontFaces() {
+ RecursiveMutexAutoLock lock(mMutex);
+ FontFaceSetImpl::UpdateHasLoadingFontFaces();
+
+ if (mHasLoadingFontFaces) {
+ return;
+ }
+
+ for (size_t i = 0; i < mRuleFaces.Length(); i++) {
+ FontFaceImpl* f = mRuleFaces[i].mFontFace;
+ if (f->Status() == FontFaceLoadStatus::Loading) {
+ mHasLoadingFontFaces = true;
+ return;
+ }
+ }
+}
+
+bool FontFaceSetDocumentImpl::MightHavePendingFontLoads() {
+ if (FontFaceSetImpl::MightHavePendingFontLoads()) {
+ return true;
+ }
+
+ // Check for pending restyles or reflows, as they might cause fonts to
+ // load as new styles apply and text runs are rebuilt.
+ nsPresContext* presContext = GetPresContext();
+ if (presContext && presContext->HasPendingRestyleOrReflow()) {
+ return true;
+ }
+
+ if (mDocument) {
+ // We defer resolving mReady until the document as fully loaded.
+ if (!mDocument->DidFireDOMContentLoaded()) {
+ return true;
+ }
+
+ // And we also wait for any CSS style sheets to finish loading, as their
+ // styles might cause new fonts to load.
+ if (mDocument->CSSLoader()->HasPendingLoads()) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+// nsIDOMEventListener
+
+NS_IMETHODIMP
+FontFaceSetDocumentImpl::HandleEvent(Event* aEvent) {
+ nsString type;
+ aEvent->GetType(type);
+
+ if (!type.EqualsLiteral("DOMContentLoaded")) {
+ return NS_ERROR_FAILURE;
+ }
+
+ RemoveDOMContentLoadedListener();
+ CheckLoadingFinished();
+
+ return NS_OK;
+}
+
+// nsICSSLoaderObserver
+
+NS_IMETHODIMP
+FontFaceSetDocumentImpl::StyleSheetLoaded(StyleSheet* aSheet, bool aWasDeferred,
+ nsresult aStatus) {
+ CheckLoadingFinished();
+ return NS_OK;
+}
+
+void FontFaceSetDocumentImpl::FlushUserFontSet() {
+ if (mDocument) {
+ mDocument->FlushUserFontSet();
+ }
+}
+
+void FontFaceSetDocumentImpl::MarkUserFontSetDirty() {
+ if (mDocument) {
+ // Ensure we trigger at least a style flush, that will eventually flush the
+ // user font set. Otherwise the font loads that that flush may cause could
+ // never be triggered.
+ if (PresShell* presShell = mDocument->GetPresShell()) {
+ presShell->EnsureStyleFlush();
+ }
+ mDocument->MarkUserFontSetDirty();
+ }
+}
+
+#undef LOG_ENABLED
+#undef LOG