/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */ /* vim: set ts=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 "FontFaceSet.h" #include "gfxFontConstants.h" #include "mozilla/css/Declaration.h" #include "mozilla/css/Loader.h" #include "mozilla/dom/FontFaceSetBinding.h" #include "mozilla/dom/FontFaceSetIterator.h" #include "mozilla/dom/FontFaceSetLoadEvent.h" #include "mozilla/dom/FontFaceSetLoadEventBinding.h" #include "mozilla/dom/Promise.h" #include "mozilla/AsyncEventDispatcher.h" #include "mozilla/Logging.h" #include "mozilla/Preferences.h" #include "mozilla/SizePrintfMacros.h" #include "mozilla/Sprintf.h" #include "mozilla/Telemetry.h" #include "nsAutoPtr.h" #include "nsContentPolicyUtils.h" #include "nsCSSParser.h" #include "nsDeviceContext.h" #include "nsFontFaceLoader.h" #include "nsIConsoleService.h" #include "nsIContentPolicy.h" #include "nsIContentSecurityPolicy.h" #include "nsIDocShell.h" #include "nsIDocument.h" #include "nsINetworkPredictor.h" #include "nsIPresShell.h" #include "nsIPrincipal.h" #include "nsISupportsPriority.h" #include "nsIWebNavigation.h" #include "nsNetUtil.h" #include "nsIProtocolHandler.h" #include "nsIInputStream.h" #include "nsPresContext.h" #include "nsPrintfCString.h" #include "nsStyleSet.h" #include "nsUTF8Utils.h" #include "nsDOMNavigationTiming.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) #define FONT_LOADING_API_ENABLED_PREF "layout.css.font-loading-api.enabled" NS_IMPL_CYCLE_COLLECTION_CLASS(FontFaceSet) NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(FontFaceSet, DOMEventTargetHelper) NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocument); NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mReady); for (size_t i = 0; i < tmp->mRuleFaces.Length(); i++) { NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRuleFaces[i].mFontFace); } for (size_t i = 0; i < tmp->mNonRuleFaces.Length(); i++) { NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNonRuleFaces[i].mFontFace); } if (tmp->mUserFontSet) { NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mUserFontSet->mFontFaceSet); } NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(FontFaceSet, DOMEventTargetHelper) tmp->Disconnect(); NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocument); NS_IMPL_CYCLE_COLLECTION_UNLINK(mReady); for (size_t i = 0; i < tmp->mRuleFaces.Length(); i++) { NS_IMPL_CYCLE_COLLECTION_UNLINK(mRuleFaces[i].mFontFace); } for (size_t i = 0; i < tmp->mNonRuleFaces.Length(); i++) { NS_IMPL_CYCLE_COLLECTION_UNLINK(mNonRuleFaces[i].mFontFace); } if (tmp->mUserFontSet) { NS_IMPL_CYCLE_COLLECTION_UNLINK(mUserFontSet->mFontFaceSet); } NS_IMPL_CYCLE_COLLECTION_UNLINK(mUserFontSet); NS_IMPL_CYCLE_COLLECTION_UNLINK_END NS_IMPL_ADDREF_INHERITED(FontFaceSet, DOMEventTargetHelper) NS_IMPL_RELEASE_INHERITED(FontFaceSet, DOMEventTargetHelper) NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(FontFaceSet) NS_INTERFACE_MAP_ENTRY(nsIDOMEventListener) NS_INTERFACE_MAP_ENTRY(nsICSSLoaderObserver) NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper) FontFaceSet::FontFaceSet(nsPIDOMWindowInner* aWindow, nsIDocument* aDocument) : DOMEventTargetHelper(aWindow) , mDocument(aDocument) , mResolveLazilyCreatedReadyPromise(false) , mStatus(FontFaceSetLoadStatus::Loaded) , mNonRuleFacesDirty(false) , mHasLoadingFontFaces(false) , mHasLoadingFontFacesIsDirty(false) , mDelayedLoadCheck(false) { MOZ_COUNT_CTOR(FontFaceSet); nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aWindow); // If the pref is not set, don't create the Promise (which the page wouldn't // be able to get to anyway) as it causes the window.FontFaceSet constructor // to be created. if (global && PrefEnabled()) { mResolveLazilyCreatedReadyPromise = true; } if (!mDocument->DidFireDOMContentLoaded()) { mDocument->AddSystemEventListener(NS_LITERAL_STRING("DOMContentLoaded"), this, false, false); } mDocument->CSSLoader()->AddObserver(this); mUserFontSet = new UserFontSet(this); } FontFaceSet::~FontFaceSet() { MOZ_COUNT_DTOR(FontFaceSet); Disconnect(); for (auto it = mLoaders.Iter(); !it.Done(); it.Next()) { it.Get()->GetKey()->Cancel(); } } JSObject* FontFaceSet::WrapObject(JSContext* aContext, JS::Handle<JSObject*> aGivenProto) { return FontFaceSetBinding::Wrap(aContext, this, aGivenProto); } void FontFaceSet::Disconnect() { RemoveDOMContentLoadedListener(); if (mDocument && mDocument->CSSLoader()) { // We're null checking CSSLoader() since FontFaceSet::Disconnect() might be // being called during unlink, at which time the loader amy already have // been unlinked from the document. mDocument->CSSLoader()->RemoveObserver(this); } } void FontFaceSet::RemoveDOMContentLoadedListener() { if (mDocument) { mDocument->RemoveSystemEventListener(NS_LITERAL_STRING("DOMContentLoaded"), this, false); } } void FontFaceSet::ParseFontShorthandForMatching( const nsAString& aFont, RefPtr<FontFamilyListRefCnt>& aFamilyList, uint32_t& aWeight, int32_t& aStretch, uint8_t& aStyle, ErrorResult& aRv) { // Parse aFont as a 'font' property value. RefPtr<Declaration> declaration = new Declaration; declaration->InitializeEmpty(); bool changed = false; nsCSSParser parser; parser.ParseProperty(eCSSProperty_font, aFont, mDocument->GetDocumentURI(), mDocument->GetDocumentURI(), mDocument->NodePrincipal(), declaration, &changed, /* aIsImportant */ false); // All of the properties we are interested in should have been set at once. MOZ_ASSERT(changed == (declaration->HasProperty(eCSSProperty_font_family) && declaration->HasProperty(eCSSProperty_font_style) && declaration->HasProperty(eCSSProperty_font_weight) && declaration->HasProperty(eCSSProperty_font_stretch))); if (!changed) { aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR); return; } nsCSSCompressedDataBlock* data = declaration->GetNormalBlock(); MOZ_ASSERT(!declaration->GetImportantBlock()); const nsCSSValue* family = data->ValueFor(eCSSProperty_font_family); if (family->GetUnit() != eCSSUnit_FontFamilyList) { // We got inherit, initial, unset, a system font, or a token stream. aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR); return; } aFamilyList = static_cast<FontFamilyListRefCnt*>(family->GetFontFamilyListValue()); int32_t weight = data->ValueFor(eCSSProperty_font_weight)->GetIntValue(); // Resolve relative font weights against the initial of font-weight // (normal, which is equivalent to 400). if (weight == NS_STYLE_FONT_WEIGHT_BOLDER) { weight = NS_FONT_WEIGHT_BOLD; } else if (weight == NS_STYLE_FONT_WEIGHT_LIGHTER) { weight = NS_FONT_WEIGHT_THIN; } aWeight = weight; aStretch = data->ValueFor(eCSSProperty_font_stretch)->GetIntValue(); aStyle = data->ValueFor(eCSSProperty_font_style)->GetIntValue(); } static bool HasAnyCharacterInUnicodeRange(gfxUserFontEntry* aEntry, const nsAString& aInput) { const char16_t* p = aInput.Data(); const char16_t* end = p + aInput.Length(); while (p < end) { uint32_t c = UTF16CharEnumerator::NextChar(&p, end); if (aEntry->CharacterInUnicodeRange(c)) { return true; } } return false; } void FontFaceSet::FindMatchingFontFaces(const nsAString& aFont, const nsAString& aText, nsTArray<FontFace*>& aFontFaces, ErrorResult& aRv) { RefPtr<FontFamilyListRefCnt> familyList; uint32_t weight; int32_t stretch; uint8_t italicStyle; ParseFontShorthandForMatching(aFont, familyList, weight, stretch, italicStyle, aRv); if (aRv.Failed()) { return; } gfxFontStyle style; style.style = italicStyle; style.weight = weight; style.stretch = stretch; nsTArray<FontFaceRecord>* arrays[2]; arrays[0] = &mNonRuleFaces; arrays[1] = &mRuleFaces; // Set of FontFaces that we want to return. nsTHashtable<nsPtrHashKey<FontFace>> matchingFaces; for (const FontFamilyName& fontFamilyName : familyList->GetFontlist()) { RefPtr<gfxFontFamily> family = mUserFontSet->LookupFamily(fontFamilyName.mName); if (!family) { continue; } AutoTArray<gfxFontEntry*,4> entries; bool needsBold; family->FindAllFontsForStyle(style, entries, needsBold); for (gfxFontEntry* e : entries) { FontFace::Entry* entry = static_cast<FontFace::Entry*>(e); if (HasAnyCharacterInUnicodeRange(entry, aText)) { for (FontFace* f : entry->GetFontFaces()) { matchingFaces.PutEntry(f); } } } } // Add all FontFaces in matchingFaces to aFontFaces, in the order // they appear in the FontFaceSet. for (nsTArray<FontFaceRecord>* array : arrays) { for (FontFaceRecord& record : *array) { FontFace* f = record.mFontFace; if (matchingFaces.Contains(f)) { aFontFaces.AppendElement(f); } } } } TimeStamp FontFaceSet::GetNavigationStartTimeStamp() { TimeStamp navStart; RefPtr<nsDOMNavigationTiming> timing(mDocument->GetNavigationTiming()); if (timing) { navStart = timing->GetNavigationStartTimeStamp(); } return navStart; } already_AddRefed<Promise> FontFaceSet::Load(JSContext* aCx, const nsAString& aFont, const nsAString& aText, ErrorResult& aRv) { FlushUserFontSet(); nsTArray<RefPtr<Promise>> promises; nsTArray<FontFace*> faces; FindMatchingFontFaces(aFont, aText, faces, aRv); if (aRv.Failed()) { return nullptr; } for (FontFace* f : faces) { RefPtr<Promise> promise = f->Load(aRv); if (aRv.Failed()) { return nullptr; } if (!promises.AppendElement(promise, fallible)) { aRv.Throw(NS_ERROR_FAILURE); return nullptr; } } return Promise::All(aCx, promises, aRv); } bool FontFaceSet::Check(const nsAString& aFont, const nsAString& aText, ErrorResult& aRv) { FlushUserFontSet(); nsTArray<FontFace*> faces; FindMatchingFontFaces(aFont, aText, faces, aRv); if (aRv.Failed()) { return false; } for (FontFace* f : faces) { if (f->Status() != FontFaceLoadStatus::Loaded) { return false; } } return true; } Promise* FontFaceSet::GetReady(ErrorResult& aRv) { if (!mReady) { nsCOMPtr<nsIGlobalObject> global = GetParentObject(); mReady = Promise::Create(global, aRv); if (!mReady) { aRv.Throw(NS_ERROR_FAILURE); return nullptr; } if (mResolveLazilyCreatedReadyPromise) { mReady->MaybeResolve(this); mResolveLazilyCreatedReadyPromise = false; } } FlushUserFontSet(); return mReady; } FontFaceSetLoadStatus FontFaceSet::Status() { FlushUserFontSet(); return mStatus; } #ifdef DEBUG bool FontFaceSet::HasRuleFontFace(FontFace* aFontFace) { for (size_t i = 0; i < mRuleFaces.Length(); i++) { if (mRuleFaces[i].mFontFace == aFontFace) { return true; } } return false; } #endif FontFaceSet* FontFaceSet::Add(FontFace& aFontFace, ErrorResult& aRv) { FlushUserFontSet(); if (aFontFace.IsInFontFaceSet(this)) { return this; } if (aFontFace.HasRule()) { aRv.Throw(NS_ERROR_DOM_INVALID_MODIFICATION_ERR); return nullptr; } aFontFace.AddFontFaceSet(this); #ifdef DEBUG for (const FontFaceRecord& rec : mNonRuleFaces) { MOZ_ASSERT(rec.mFontFace != &aFontFace, "FontFace should not occur in mNonRuleFaces twice"); } #endif FontFaceRecord* rec = mNonRuleFaces.AppendElement(); rec->mFontFace = &aFontFace; rec->mSheetType = SheetType::Unknown; // unused for mNonRuleFaces rec->mLoadEventShouldFire = aFontFace.Status() == FontFaceLoadStatus::Unloaded || aFontFace.Status() == FontFaceLoadStatus::Loading; mNonRuleFacesDirty = true; RebuildUserFontSet(); mHasLoadingFontFacesIsDirty = true; CheckLoadingStarted(); return this; } void FontFaceSet::Clear() { FlushUserFontSet(); if (mNonRuleFaces.IsEmpty()) { return; } for (size_t i = 0; i < mNonRuleFaces.Length(); i++) { FontFace* f = mNonRuleFaces[i].mFontFace; f->RemoveFontFaceSet(this); } mNonRuleFaces.Clear(); mNonRuleFacesDirty = true; RebuildUserFontSet(); mHasLoadingFontFacesIsDirty = true; CheckLoadingFinished(); } bool FontFaceSet::Delete(FontFace& aFontFace) { FlushUserFontSet(); if (aFontFace.HasRule()) { return false; } bool removed = false; for (size_t i = 0; i < mNonRuleFaces.Length(); i++) { if (mNonRuleFaces[i].mFontFace == &aFontFace) { mNonRuleFaces.RemoveElementAt(i); removed = true; break; } } if (!removed) { return false; } aFontFace.RemoveFontFaceSet(this); mNonRuleFacesDirty = true; RebuildUserFontSet(); mHasLoadingFontFacesIsDirty = true; CheckLoadingFinished(); return true; } bool FontFaceSet::HasAvailableFontFace(FontFace* aFontFace) { return aFontFace->IsInFontFaceSet(this); } bool FontFaceSet::Has(FontFace& aFontFace) { FlushUserFontSet(); return HasAvailableFontFace(&aFontFace); } FontFace* FontFaceSet::GetFontFaceAt(uint32_t aIndex) { FlushUserFontSet(); if (aIndex < mRuleFaces.Length()) { return mRuleFaces[aIndex].mFontFace; } aIndex -= mRuleFaces.Length(); if (aIndex < mNonRuleFaces.Length()) { return mNonRuleFaces[aIndex].mFontFace; } return nullptr; } uint32_t FontFaceSet::Size() { FlushUserFontSet(); // Web IDL objects can only expose array index properties up to INT32_MAX. size_t total = mRuleFaces.Length() + mNonRuleFaces.Length(); return std::min<size_t>(total, INT32_MAX); } already_AddRefed<FontFaceSetIterator> FontFaceSet::Entries() { RefPtr<FontFaceSetIterator> it = new FontFaceSetIterator(this, true); return it.forget(); } already_AddRefed<FontFaceSetIterator> FontFaceSet::Values() { RefPtr<FontFaceSetIterator> it = new FontFaceSetIterator(this, false); return it.forget(); } void FontFaceSet::ForEach(JSContext* aCx, FontFaceSetForEachCallback& aCallback, JS::Handle<JS::Value> aThisArg, ErrorResult& aRv) { JS::Rooted<JS::Value> thisArg(aCx, aThisArg); for (size_t i = 0; i < Size(); i++) { FontFace* face = GetFontFaceAt(i); aCallback.Call(thisArg, *face, *face, *this, aRv); if (aRv.Failed()) { return; } } } void FontFaceSet::RemoveLoader(nsFontFaceLoader* aLoader) { mLoaders.RemoveEntry(aLoader); } nsresult FontFaceSet::StartLoad(gfxUserFontEntry* aUserFontEntry, const gfxFontFaceSrc* aFontFaceSrc) { nsresult rv; nsCOMPtr<nsIStreamLoader> streamLoader; nsCOMPtr<nsILoadGroup> loadGroup(mDocument->GetDocumentLoadGroup()); nsCOMPtr<nsIChannel> channel; // 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. rv = NS_NewChannelWithTriggeringPrincipal(getter_AddRefs(channel), aFontFaceSrc->mURI, mDocument, aUserFontEntry->GetPrincipal(), nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS, nsIContentPolicy::TYPE_FONT, loadGroup); NS_ENSURE_SUCCESS(rv, rv); RefPtr<nsFontFaceLoader> fontLoader = new nsFontFaceLoader(aUserFontEntry, aFontFaceSrc->mURI, this, channel); if (LOG_ENABLED()) { LOG(("userfonts (%p) download start - font uri: (%s) " "referrer uri: (%s)\n", fontLoader.get(), aFontFaceSrc->mURI->GetSpecOrDefault().get(), aFontFaceSrc->mReferrer ? aFontFaceSrc->mReferrer->GetSpecOrDefault().get() : "")); } nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel)); if (httpChannel) { httpChannel->SetReferrerWithPolicy(aFontFaceSrc->mReferrer, mDocument->GetReferrerPolicy()); nsAutoCString accept("application/font-woff;q=0.9,*/*;q=0.8"); if (Preferences::GetBool(GFX_PREF_WOFF2_ENABLED)) { accept.Insert(NS_LITERAL_CSTRING("application/font-woff2;q=1.0,"), 0); } httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("Accept"), accept, false); // For WOFF and WOFF2, we should tell servers/proxies/etc NOT to try // and apply additional compression at the content-encoding layer if (aFontFaceSrc->mFormatFlags & (gfxUserFontSet::FLAG_FORMAT_WOFF | gfxUserFontSet::FLAG_FORMAT_WOFF2)) { httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("Accept-Encoding"), NS_LITERAL_CSTRING("identity"), false); } } nsCOMPtr<nsISupportsPriority> priorityChannel(do_QueryInterface(channel)); if (priorityChannel) { priorityChannel->AdjustPriority(nsISupportsPriority::PRIORITY_HIGH); } rv = NS_NewStreamLoader(getter_AddRefs(streamLoader), fontLoader); NS_ENSURE_SUCCESS(rv, rv); mozilla::net::PredictorLearn(aFontFaceSrc->mURI, mDocument->GetDocumentURI(), nsINetworkPredictor::LEARN_LOAD_SUBRESOURCE, loadGroup); rv = channel->AsyncOpen2(streamLoader); if (NS_FAILED(rv)) { fontLoader->DropChannel(); // explicitly need to break ref cycle } if (NS_SUCCEEDED(rv)) { mLoaders.PutEntry(fontLoader); fontLoader->StartedLoading(streamLoader); aUserFontEntry->SetLoader(fontLoader); // let the font entry remember the // loader, in case we need to cancel it } return rv; } bool FontFaceSet::UpdateRules(const nsTArray<nsFontFaceRuleContainer>& aRules) { MOZ_ASSERT(mUserFontSet); // 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 nsDataHashtable<nsPtrHashKey<nsCSSFontFaceRule>, FontFace*> ruleFaceMap; for (size_t i = 0, i_end = mRuleFaces.Length(); i < i_end; ++i) { FontFace* f = mRuleFaces[i].mFontFace; if (!f) { continue; } ruleFaceMap.Put(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; mRuleFaces.SwapElements(oldRecords); // 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 (auto it = mUserFontSet->mFontFamilies.Iter(); !it.Done(); it.Next()) { it.Data()->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. nsTHashtable<nsPtrHashKey<nsCSSFontFaceRule>> 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. if (handledRules.Contains(aRules[i].mRule)) { continue; } nsCSSFontFaceRule* rule = aRules[i].mRule; RefPtr<FontFace> f = ruleFaceMap.Get(rule); if (!f.get()) { f = FontFace::CreateForRule(GetParentObject(), this, rule); } InsertRuleFontFace(f, aRules[i].mSheetType, oldRecords, modified); handledRules.PutEntry(aRules[i].mRule); } 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 = mUserFontSet->mFontFamilies.Iter(); !it.Done(); it.Next()) { if (it.Data()->GetFontList().IsEmpty()) { 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<FontFace> 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 (mUserFontSet->mRebuildLocalRules) { mUserFontSet->mLocalRulesUsed = false; mUserFontSet->mRebuildLocalRules = false; } if (LOG_ENABLED() && !mRuleFaces.IsEmpty()) { LOG(("userfonts (%p) userfont rules update (%s) rule count: %d", mUserFontSet.get(), (modified ? "modified" : "not modified"), (int)(mRuleFaces.Length()))); } return modified; } static bool HasLocalSrc(const nsCSSValue::Array *aSrcArr) { size_t numSrc = aSrcArr->Count(); for (size_t i = 0; i < numSrc; i++) { if (aSrcArr->Item(i).GetUnit() == eCSSUnit_Local_Font) { return true; } } return false; } void FontFaceSet::IncrementGeneration(bool aIsRebuild) { MOZ_ASSERT(mUserFontSet); mUserFontSet->IncrementGeneration(aIsRebuild); } void FontFaceSet::InsertNonRuleFontFace(FontFace* aFontFace, bool& aFontSetModified) { nsAutoString fontfamily; if (!aFontFace->GetFamilyName(fontfamily)) { // If there is no family name, this rule cannot contribute a // usable font, so there is no point in processing it further. return; } // Just create a new font entry if we haven't got one already. if (!aFontFace->GetUserFontEntry()) { // XXX Should we be checking mUserFontSet->mLocalRulesUsed like // InsertRuleFontFace does? RefPtr<gfxUserFontEntry> entry = FindOrCreateUserFontEntryFromFontFace(fontfamily, aFontFace, SheetType::Doc); if (!entry) { return; } aFontFace->SetUserFontEntry(entry); } aFontSetModified = true; mUserFontSet->AddUserFontEntry(fontfamily, aFontFace->GetUserFontEntry()); } void FontFaceSet::InsertRuleFontFace(FontFace* aFontFace, SheetType aSheetType, nsTArray<FontFaceRecord>& aOldRecords, bool& aFontSetModified) { nsAutoString fontfamily; if (!aFontFace->GetFamilyName(fontfamily)) { // 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.mSheetType == aSheetType) { // if local rules were used, don't use the old font entry // for rules containing src local usage if (mUserFontSet->mLocalRulesUsed && mUserFontSet->mRebuildLocalRules) { nsCSSValue val; aFontFace->GetDesc(eCSSFontDesc_Src, val); nsCSSUnit unit = val.GetUnit(); if (unit == eCSSUnit_Array && HasLocalSrc(val.GetArrayValue())) { // 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"); mUserFontSet->AddUserFontEntry(fontfamily, entry); MOZ_ASSERT(!HasRuleFontFace(rec.mFontFace), "FontFace should not occur in mRuleFaces twice"); mRuleFaces.AppendElement(rec); aOldRecords.RemoveElementAt(i); // 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: RefPtr<gfxUserFontEntry> entry = FindOrCreateUserFontEntryFromFontFace(fontfamily, aFontFace, 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.mSheetType = aSheetType; rec.mLoadEventShouldFire = aFontFace->Status() == FontFaceLoadStatus::Unloaded || aFontFace->Status() == FontFaceLoadStatus::Loading; aFontFace->SetUserFontEntry(entry); MOZ_ASSERT(!HasRuleFontFace(aFontFace), "FontFace should not occur in mRuleFaces twice"); mRuleFaces.AppendElement(rec); // 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. mUserFontSet->AddUserFontEntry(fontfamily, entry); } /* static */ already_AddRefed<gfxUserFontEntry> FontFaceSet::FindOrCreateUserFontEntryFromFontFace(FontFace* aFontFace) { nsAutoString fontfamily; if (!aFontFace->GetFamilyName(fontfamily)) { // If there is no family name, this rule cannot contribute a // usable font, so there is no point in processing it further. return nullptr; } return FindOrCreateUserFontEntryFromFontFace(fontfamily, aFontFace, SheetType::Doc); } /* static */ already_AddRefed<gfxUserFontEntry> FontFaceSet::FindOrCreateUserFontEntryFromFontFace(const nsAString& aFamilyName, FontFace* aFontFace, SheetType aSheetType) { FontFaceSet* set = aFontFace->GetPrimaryFontFaceSet(); nsCSSValue val; nsCSSUnit unit; uint32_t weight = NS_STYLE_FONT_WEIGHT_NORMAL; int32_t stretch = NS_STYLE_FONT_STRETCH_NORMAL; uint8_t italicStyle = NS_STYLE_FONT_STYLE_NORMAL; uint32_t languageOverride = NO_FONT_LANGUAGE_OVERRIDE; uint8_t fontDisplay = NS_FONT_DISPLAY_AUTO; // set up weight aFontFace->GetDesc(eCSSFontDesc_Weight, val); unit = val.GetUnit(); if (unit == eCSSUnit_Integer || unit == eCSSUnit_Enumerated) { weight = val.GetIntValue(); if (weight == 0) { weight = NS_STYLE_FONT_WEIGHT_NORMAL; } } else if (unit == eCSSUnit_Normal) { weight = NS_STYLE_FONT_WEIGHT_NORMAL; } else { NS_ASSERTION(unit == eCSSUnit_Null, "@font-face weight has unexpected unit"); } // set up stretch aFontFace->GetDesc(eCSSFontDesc_Stretch, val); unit = val.GetUnit(); if (unit == eCSSUnit_Enumerated) { stretch = val.GetIntValue(); } else if (unit == eCSSUnit_Normal) { stretch = NS_STYLE_FONT_STRETCH_NORMAL; } else { NS_ASSERTION(unit == eCSSUnit_Null, "@font-face stretch has unexpected unit"); } // set up font style aFontFace->GetDesc(eCSSFontDesc_Style, val); unit = val.GetUnit(); if (unit == eCSSUnit_Enumerated) { italicStyle = val.GetIntValue(); } else if (unit == eCSSUnit_Normal) { italicStyle = NS_STYLE_FONT_STYLE_NORMAL; } else { NS_ASSERTION(unit == eCSSUnit_Null, "@font-face style has unexpected unit"); } // set up font display aFontFace->GetDesc(eCSSFontDesc_Display, val); unit = val.GetUnit(); if (unit == eCSSUnit_Enumerated) { fontDisplay = val.GetIntValue(); } else { NS_ASSERTION(unit == eCSSUnit_Null, "@font-face style has unexpected unit"); } // set up font features nsTArray<gfxFontFeature> featureSettings; aFontFace->GetDesc(eCSSFontDesc_FontFeatureSettings, val); unit = val.GetUnit(); if (unit == eCSSUnit_Normal) { // empty list of features } else if (unit == eCSSUnit_PairList || unit == eCSSUnit_PairListDep) { nsRuleNode::ComputeFontFeatures(val.GetPairListValue(), featureSettings); } else { NS_ASSERTION(unit == eCSSUnit_Null, "@font-face font-feature-settings has unexpected unit"); } // set up font language override aFontFace->GetDesc(eCSSFontDesc_FontLanguageOverride, val); unit = val.GetUnit(); if (unit == eCSSUnit_Normal) { // empty feature string } else if (unit == eCSSUnit_String) { nsString stringValue; val.GetStringValue(stringValue); languageOverride = gfxFontStyle::ParseFontLanguageOverride(stringValue); } else { NS_ASSERTION(unit == eCSSUnit_Null, "@font-face font-language-override has unexpected unit"); } // set up unicode-range nsAutoPtr<gfxCharacterMap> unicodeRanges; aFontFace->GetDesc(eCSSFontDesc_UnicodeRange, val); unit = val.GetUnit(); if (unit == eCSSUnit_Array) { unicodeRanges = new gfxCharacterMap(); const nsCSSValue::Array& sources = *val.GetArrayValue(); MOZ_ASSERT(sources.Count() % 2 == 0, "odd number of entries in a unicode-range: array"); for (uint32_t i = 0; i < sources.Count(); i += 2) { uint32_t min = sources[i].GetIntValue(); uint32_t max = sources[i+1].GetIntValue(); unicodeRanges->SetRange(min, max); } } // set up src array nsTArray<gfxFontFaceSrc> srcArray; if (aFontFace->HasFontData()) { gfxFontFaceSrc* face = srcArray.AppendElement(); if (!face) return nullptr; face->mSourceType = gfxFontFaceSrc::eSourceType_Buffer; face->mBuffer = aFontFace->CreateBufferSource(); } else { aFontFace->GetDesc(eCSSFontDesc_Src, val); unit = val.GetUnit(); if (unit == eCSSUnit_Array) { nsCSSValue::Array* srcArr = val.GetArrayValue(); size_t numSrc = srcArr->Count(); for (size_t i = 0; i < numSrc; i++) { val = srcArr->Item(i); unit = val.GetUnit(); gfxFontFaceSrc* face = srcArray.AppendElements(1); if (!face) return nullptr; switch (unit) { case eCSSUnit_Local_Font: val.GetStringValue(face->mLocalName); face->mSourceType = gfxFontFaceSrc::eSourceType_Local; face->mURI = nullptr; face->mFormatFlags = 0; break; case eCSSUnit_URL: face->mSourceType = gfxFontFaceSrc::eSourceType_URL; face->mURI = val.GetURLValue(); face->mReferrer = val.GetURLStructValue()->mReferrer; face->mReferrerPolicy = set->mDocument->GetReferrerPolicy(); face->mOriginPrincipal = val.GetURLStructValue()->mOriginPrincipal; NS_ASSERTION(face->mOriginPrincipal, "null origin principal in @font-face rule"); // agent and user stylesheets are treated slightly differently, // the same-site origin check and access control headers are // enforced against the sheet principal rather than the document // principal to allow user stylesheets to include @font-face rules face->mUseOriginPrincipal = (aSheetType == SheetType::User || aSheetType == SheetType::Agent); face->mLocalName.Truncate(); face->mFormatFlags = 0; while (i + 1 < numSrc && (val = srcArr->Item(i+1), val.GetUnit() == eCSSUnit_Font_Format)) { nsDependentString valueString(val.GetStringBufferValue()); if (valueString.LowerCaseEqualsASCII("woff")) { face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_WOFF; } else if (Preferences::GetBool(GFX_PREF_WOFF2_ENABLED) && valueString.LowerCaseEqualsASCII("woff2")) { face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_WOFF2; } else if (valueString.LowerCaseEqualsASCII("opentype")) { face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_OPENTYPE; } else if (valueString.LowerCaseEqualsASCII("truetype")) { face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_TRUETYPE; } else if (valueString.LowerCaseEqualsASCII("truetype-aat")) { face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_TRUETYPE_AAT; } else if (valueString.LowerCaseEqualsASCII("embedded-opentype")) { face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_EOT; } else if (valueString.LowerCaseEqualsASCII("svg")) { face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_SVG; } else { // unknown format specified, mark to distinguish from the // case where no format hints are specified face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_UNKNOWN; } i++; } if (!face->mURI) { // if URI not valid, omit from src array srcArray.RemoveElementAt(srcArray.Length() - 1); NS_WARNING("null url in @font-face rule"); continue; } break; default: NS_ASSERTION(unit == eCSSUnit_Local_Font || unit == eCSSUnit_URL, "strange unit type in font-face src array"); break; } } } else { NS_ASSERTION(unit == eCSSUnit_Null, "@font-face src has unexpected unit"); } } if (srcArray.IsEmpty()) { return nullptr; } RefPtr<gfxUserFontEntry> entry = set->mUserFontSet->FindOrCreateUserFontEntry(aFamilyName, srcArray, weight, stretch, italicStyle, featureSettings, languageOverride, unicodeRanges, fontDisplay); return entry.forget(); } nsCSSFontFaceRule* FontFaceSet::FindRuleForEntry(gfxFontEntry* aFontEntry) { NS_ASSERTION(!aFontEntry->mIsUserFontContainer, "only platform font entries"); for (uint32_t i = 0; i < mRuleFaces.Length(); ++i) { FontFace* f = mRuleFaces[i].mFontFace; gfxUserFontEntry* entry = f->GetUserFontEntry(); if (entry && entry->GetPlatformFontEntry() == aFontEntry) { return f->GetRule(); } } return nullptr; } nsCSSFontFaceRule* FontFaceSet::FindRuleForUserFontEntry(gfxUserFontEntry* aUserFontEntry) { for (uint32_t i = 0; i < mRuleFaces.Length(); ++i) { FontFace* f = mRuleFaces[i].mFontFace; if (f->GetUserFontEntry() == aUserFontEntry) { return f->GetRule(); } } return nullptr; } nsresult FontFaceSet::LogMessage(gfxUserFontEntry* aUserFontEntry, const char* aMessage, uint32_t aFlags, nsresult aStatus) { nsCOMPtr<nsIConsoleService> console(do_GetService(NS_CONSOLESERVICE_CONTRACTID)); if (!console) { return NS_ERROR_NOT_AVAILABLE; } nsAutoCString familyName; nsAutoCString fontURI; aUserFontEntry->GetFamilyNameAndURIForLogging(familyName, fontURI); char weightKeywordBuf[8]; // plenty to sprintf() a uint16_t const char* weightKeyword; const nsAFlatCString& weightKeywordString = nsCSSProps::ValueToKeyword(aUserFontEntry->Weight(), nsCSSProps::kFontWeightKTable); if (weightKeywordString.Length() > 0) { weightKeyword = weightKeywordString.get(); } else { SprintfLiteral(weightKeywordBuf, "%u", aUserFontEntry->Weight()); weightKeyword = weightKeywordBuf; } nsPrintfCString message ("downloadable font: %s " "(font-family: \"%s\" style:%s weight:%s stretch:%s src index:%d)", aMessage, familyName.get(), aUserFontEntry->IsItalic() ? "italic" : "normal", weightKeyword, nsCSSProps::ValueToKeyword(aUserFontEntry->Stretch(), nsCSSProps::kFontStretchKTable).get(), aUserFontEntry->GetSrcIndex()); if (NS_FAILED(aStatus)) { message.AppendLiteral(": "); switch (aStatus) { case NS_ERROR_DOM_BAD_URI: message.AppendLiteral("bad URI or cross-site access not allowed"); break; case NS_ERROR_CONTENT_BLOCKED: message.AppendLiteral("content blocked"); break; default: message.AppendLiteral("status="); message.AppendInt(static_cast<uint32_t>(aStatus)); break; } } message.AppendLiteral(" source: "); message.Append(fontURI); if (LOG_ENABLED()) { LOG(("userfonts (%p) %s", mUserFontSet.get(), message.get())); } // try to give the user an indication of where the rule came from nsCSSFontFaceRule* rule = FindRuleForUserFontEntry(aUserFontEntry); nsString href; nsString text; nsresult rv; uint32_t line = 0; uint32_t column = 0; if (rule) { rv = rule->GetCssText(text); NS_ENSURE_SUCCESS(rv, rv); CSSStyleSheet* sheet = rule->GetStyleSheet(); // if the style sheet is removed while the font is loading can be null if (sheet) { nsCString spec = sheet->GetSheetURI()->GetSpecOrDefault(); CopyUTF8toUTF16(spec, href); } else { NS_WARNING("null parent stylesheet for @font-face rule"); href.AssignLiteral("unknown"); } line = rule->GetLineNumber(); column = rule->GetColumnNumber(); } nsCOMPtr<nsIScriptError> scriptError = do_CreateInstance(NS_SCRIPTERROR_CONTRACTID, &rv); NS_ENSURE_SUCCESS(rv, rv); uint64_t innerWindowID = mDocument->InnerWindowID(); rv = scriptError->InitWithWindowID(NS_ConvertUTF8toUTF16(message), href, // file text, // src line line, column, aFlags, // flags "CSS Loader", // category (make separate?) innerWindowID); if (NS_SUCCEEDED(rv)) { console->LogMessage(scriptError); } return NS_OK; } nsresult FontFaceSet::CheckFontLoad(const gfxFontFaceSrc* aFontFaceSrc, nsIPrincipal** aPrincipal, bool* aBypassCache) { NS_ASSERTION(aFontFaceSrc && aFontFaceSrc->mSourceType == gfxFontFaceSrc::eSourceType_URL, "bad font face url passed to fontloader"); // check same-site origin NS_ASSERTION(aFontFaceSrc->mURI, "null font uri"); if (!aFontFaceSrc->mURI) return NS_ERROR_FAILURE; // use document principal, original principal if flag set // this enables user stylesheets to load font files via // @font-face rules *aPrincipal = mDocument->NodePrincipal(); NS_ASSERTION(aFontFaceSrc->mOriginPrincipal, "null origin principal in @font-face rule"); if (aFontFaceSrc->mUseOriginPrincipal) { *aPrincipal = aFontFaceSrc->mOriginPrincipal; } *aBypassCache = false; nsCOMPtr<nsIDocShell> docShell = mDocument->GetDocShell(); if (docShell) { uint32_t loadType; if (NS_SUCCEEDED(docShell->GetLoadType(&loadType))) { if ((loadType >> 16) & nsIWebNavigation::LOAD_FLAGS_BYPASS_CACHE) { *aBypassCache = true; } } uint32_t flags; if (NS_SUCCEEDED(docShell->GetDefaultLoadFlags(&flags))) { if (flags & nsIRequest::LOAD_BYPASS_CACHE) { *aBypassCache = true; } } } return NS_OK; } // @arg aPrincipal: generally this is mDocument->NodePrincipal() but // might also be the original principal which enables user stylesheets // to load font files via @font-face rules. bool FontFaceSet::IsFontLoadAllowed(nsIURI* aFontLocation, nsIPrincipal* aPrincipal) { int16_t shouldLoad = nsIContentPolicy::ACCEPT; nsresult rv = NS_CheckContentLoadPolicy(nsIContentPolicy::TYPE_FONT, aFontLocation, aPrincipal, mDocument, EmptyCString(), // mime type nullptr, // aExtra &shouldLoad, nsContentUtils::GetContentPolicy(), nsContentUtils::GetSecurityManager()); return NS_SUCCEEDED(rv) && NS_CP_ACCEPTED(shouldLoad); } nsresult FontFaceSet::SyncLoadFontData(gfxUserFontEntry* aFontToLoad, const gfxFontFaceSrc* aFontFaceSrc, uint8_t*& aBuffer, uint32_t& aBufferLength) { nsresult rv; nsCOMPtr<nsIChannel> channel; // 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_DATA_INHERITS or not, to be more // restrictive we use SEC_REQUIRE_SAME_ORIGIN_DATA_INHERITS. rv = NS_NewChannelWithTriggeringPrincipal(getter_AddRefs(channel), aFontFaceSrc->mURI, mDocument, aFontToLoad->GetPrincipal(), nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_INHERITS, nsIContentPolicy::TYPE_FONT); NS_ENSURE_SUCCESS(rv, rv); // blocking stream is OK for data URIs nsCOMPtr<nsIInputStream> stream; rv = channel->Open2(getter_AddRefs(stream)); NS_ENSURE_SUCCESS(rv, rv); uint64_t bufferLength64; rv = stream->Available(&bufferLength64); NS_ENSURE_SUCCESS(rv, rv); if (bufferLength64 == 0) { return NS_ERROR_FAILURE; } if (bufferLength64 > UINT32_MAX) { return NS_ERROR_FILE_TOO_BIG; } aBufferLength = static_cast<uint32_t>(bufferLength64); // read all the decoded data aBuffer = static_cast<uint8_t*> (moz_xmalloc(sizeof(uint8_t) * aBufferLength)); if (!aBuffer) { aBufferLength = 0; return NS_ERROR_OUT_OF_MEMORY; } uint32_t numRead, totalRead = 0; while (NS_SUCCEEDED(rv = stream->Read(reinterpret_cast<char*>(aBuffer + totalRead), aBufferLength - totalRead, &numRead)) && numRead != 0) { totalRead += numRead; if (totalRead > aBufferLength) { rv = NS_ERROR_FAILURE; break; } } // make sure there's a mime type if (NS_SUCCEEDED(rv)) { nsAutoCString mimeType; rv = channel->GetContentType(mimeType); aBufferLength = totalRead; } if (NS_FAILED(rv)) { free(aBuffer); aBuffer = nullptr; aBufferLength = 0; return rv; } return NS_OK; } bool FontFaceSet::GetPrivateBrowsing() { nsCOMPtr<nsILoadContext> loadContext = mDocument->GetLoadContext(); return loadContext && loadContext->UsePrivateBrowsing(); } void FontFaceSet::OnFontFaceStatusChanged(FontFace* aFontFace) { MOZ_ASSERT(HasAvailableFontFace(aFontFace)); mHasLoadingFontFacesIsDirty = true; if (aFontFace->Status() == FontFaceLoadStatus::Loading) { CheckLoadingStarted(); } else { MOZ_ASSERT(aFontFace->Status() == FontFaceLoadStatus::Loaded || aFontFace->Status() == FontFaceLoadStatus::Error); // When a font finishes downloading, nsPresContext::UserFontSetUpdated // will be called immediately afterwards to request a reflow of the // relevant elements in the document. We want to wait until the reflow // request has been done before the FontFaceSet is marked as Loaded so // that we don't briefly set the FontFaceSet to Loaded and then Loading // again once the reflow is pending. So we go around the event loop // and call CheckLoadingFinished() after the reflow has been queued. if (!mDelayedLoadCheck) { mDelayedLoadCheck = true; nsCOMPtr<nsIRunnable> checkTask = NewRunnableMethod(this, &FontFaceSet::CheckLoadingFinishedAfterDelay); NS_DispatchToMainThread(checkTask); } } } void FontFaceSet::DidRefresh() { CheckLoadingFinished(); } void FontFaceSet::CheckLoadingFinishedAfterDelay() { mDelayedLoadCheck = false; CheckLoadingFinished(); } void FontFaceSet::CheckLoadingStarted() { if (!HasLoadingFontFaces()) { return; } if (mStatus == FontFaceSetLoadStatus::Loading) { // We have already dispatched a loading event and replaced mReady // with a fresh, unresolved promise. return; } mStatus = FontFaceSetLoadStatus::Loading; (new AsyncEventDispatcher(this, NS_LITERAL_STRING("loading"), false))->PostDOMEvent(); if (PrefEnabled()) { if (mReady) { if (GetParentObject()) { ErrorResult rv; mReady = Promise::Create(GetParentObject(), rv); } } if (!mReady) { mResolveLazilyCreatedReadyPromise = false; } } } void FontFaceSet::UpdateHasLoadingFontFaces() { mHasLoadingFontFacesIsDirty = false; mHasLoadingFontFaces = false; for (size_t i = 0; i < mRuleFaces.Length(); i++) { FontFace* f = mRuleFaces[i].mFontFace; if (f->Status() == FontFaceLoadStatus::Loading) { mHasLoadingFontFaces = true; return; } } for (size_t i = 0; i < mNonRuleFaces.Length(); i++) { if (mNonRuleFaces[i].mFontFace->Status() == FontFaceLoadStatus::Loading) { mHasLoadingFontFaces = true; return; } } } bool FontFaceSet::HasLoadingFontFaces() { if (mHasLoadingFontFacesIsDirty) { UpdateHasLoadingFontFaces(); } return mHasLoadingFontFaces; } bool FontFaceSet::MightHavePendingFontLoads() { // Check for FontFace objects in the FontFaceSet that are still loading. if (HasLoadingFontFaces()) { 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; } void FontFaceSet::CheckLoadingFinished() { if (mDelayedLoadCheck) { // Wait until the runnable posted in OnFontFaceStatusChanged calls us. return; } if (mStatus == FontFaceSetLoadStatus::Loaded) { // We've already resolved mReady and dispatched the loadingdone/loadingerror // events. return; } if (MightHavePendingFontLoads()) { // We're not finished loading yet. return; } mStatus = FontFaceSetLoadStatus::Loaded; if (mReady) { mReady->MaybeResolve(this); } else { mResolveLazilyCreatedReadyPromise = true; } // Now dispatch the loadingdone/loadingerror events. nsTArray<FontFace*> loaded; nsTArray<FontFace*> failed; for (size_t i = 0; i < mRuleFaces.Length(); i++) { if (!mRuleFaces[i].mLoadEventShouldFire) { continue; } FontFace* f = mRuleFaces[i].mFontFace; if (f->Status() == FontFaceLoadStatus::Loaded) { loaded.AppendElement(f); mRuleFaces[i].mLoadEventShouldFire = false; } else if (f->Status() == FontFaceLoadStatus::Error) { failed.AppendElement(f); mRuleFaces[i].mLoadEventShouldFire = false; } } for (size_t i = 0; i < mNonRuleFaces.Length(); i++) { if (!mNonRuleFaces[i].mLoadEventShouldFire) { continue; } FontFace* f = mNonRuleFaces[i].mFontFace; if (f->Status() == FontFaceLoadStatus::Loaded) { loaded.AppendElement(f); mNonRuleFaces[i].mLoadEventShouldFire = false; } else if (f->Status() == FontFaceLoadStatus::Error) { failed.AppendElement(f); mNonRuleFaces[i].mLoadEventShouldFire = false; } } DispatchLoadingFinishedEvent(NS_LITERAL_STRING("loadingdone"), loaded); if (!failed.IsEmpty()) { DispatchLoadingFinishedEvent(NS_LITERAL_STRING("loadingerror"), failed); } } void FontFaceSet::DispatchLoadingFinishedEvent( const nsAString& aType, const nsTArray<FontFace*>& aFontFaces) { FontFaceSetLoadEventInit init; init.mBubbles = false; init.mCancelable = false; OwningNonNull<FontFace>* elements = init.mFontfaces.AppendElements(aFontFaces.Length(), fallible); MOZ_ASSERT(elements); for (size_t i = 0; i < aFontFaces.Length(); i++) { elements[i] = aFontFaces[i]; } RefPtr<FontFaceSetLoadEvent> event = FontFaceSetLoadEvent::Constructor(this, aType, init); (new AsyncEventDispatcher(this, event))->PostDOMEvent(); } // nsIDOMEventListener NS_IMETHODIMP FontFaceSet::HandleEvent(nsIDOMEvent* aEvent) { nsString type; aEvent->GetType(type); if (!type.EqualsLiteral("DOMContentLoaded")) { return NS_ERROR_FAILURE; } RemoveDOMContentLoadedListener(); CheckLoadingFinished(); return NS_OK; } /* static */ bool FontFaceSet::PrefEnabled() { static bool initialized = false; static bool enabled; if (!initialized) { initialized = true; Preferences::AddBoolVarCache(&enabled, FONT_LOADING_API_ENABLED_PREF); } return enabled; } // nsICSSLoaderObserver NS_IMETHODIMP FontFaceSet::StyleSheetLoaded(StyleSheet* aSheet, bool aWasAlternate, nsresult aStatus) { CheckLoadingFinished(); return NS_OK; } void FontFaceSet::FlushUserFontSet() { if (mDocument) { mDocument->FlushUserFontSet(); } } void FontFaceSet::RebuildUserFontSet() { if (mDocument) { mDocument->RebuildUserFontSet(); } } nsPresContext* FontFaceSet::GetPresContext() { if (!mDocument) { return nullptr; } nsIPresShell* shell = mDocument->GetShell(); return shell ? shell->GetPresContext() : nullptr; } // -- FontFaceSet::UserFontSet ------------------------------------------------ /* virtual */ nsresult FontFaceSet::UserFontSet::CheckFontLoad(const gfxFontFaceSrc* aFontFaceSrc, nsIPrincipal** aPrincipal, bool* aBypassCache) { if (!mFontFaceSet) { return NS_ERROR_FAILURE; } return mFontFaceSet->CheckFontLoad(aFontFaceSrc, aPrincipal, aBypassCache); } /* virtual */ bool FontFaceSet::UserFontSet::IsFontLoadAllowed(nsIURI* aFontLocation, nsIPrincipal* aPrincipal) { return mFontFaceSet && mFontFaceSet->IsFontLoadAllowed(aFontLocation, aPrincipal); } /* virtual */ nsresult FontFaceSet::UserFontSet::StartLoad(gfxUserFontEntry* aUserFontEntry, const gfxFontFaceSrc* aFontFaceSrc) { if (!mFontFaceSet) { return NS_ERROR_FAILURE; } return mFontFaceSet->StartLoad(aUserFontEntry, aFontFaceSrc); } void FontFaceSet::UserFontSet::RecordFontLoadDone(uint32_t aFontSize, TimeStamp aDoneTime) { mDownloadCount++; mDownloadSize += aFontSize; if (!mFontFaceSet) { return; } } /* virtual */ nsresult FontFaceSet::UserFontSet::LogMessage(gfxUserFontEntry* aUserFontEntry, const char* aMessage, uint32_t aFlags, nsresult aStatus) { if (!mFontFaceSet) { return NS_ERROR_FAILURE; } return mFontFaceSet->LogMessage(aUserFontEntry, aMessage, aFlags, aStatus); } /* virtual */ nsresult FontFaceSet::UserFontSet::SyncLoadFontData(gfxUserFontEntry* aFontToLoad, const gfxFontFaceSrc* aFontFaceSrc, uint8_t*& aBuffer, uint32_t& aBufferLength) { if (!mFontFaceSet) { return NS_ERROR_FAILURE; } return mFontFaceSet->SyncLoadFontData(aFontToLoad, aFontFaceSrc, aBuffer, aBufferLength); } /* virtual */ bool FontFaceSet::UserFontSet::GetPrivateBrowsing() { return mFontFaceSet && mFontFaceSet->GetPrivateBrowsing(); } /* virtual */ void FontFaceSet::UserFontSet::DoRebuildUserFontSet() { if (!mFontFaceSet) { return; } mFontFaceSet->RebuildUserFontSet(); } /* virtual */ already_AddRefed<gfxUserFontEntry> FontFaceSet::UserFontSet::CreateUserFontEntry( const nsTArray<gfxFontFaceSrc>& aFontFaceSrcList, uint32_t aWeight, int32_t aStretch, uint8_t aStyle, const nsTArray<gfxFontFeature>& aFeatureSettings, uint32_t aLanguageOverride, gfxSparseBitSet* aUnicodeRanges, uint8_t aFontDisplay) { RefPtr<gfxUserFontEntry> entry = new FontFace::Entry(this, aFontFaceSrcList, aWeight, aStretch, aStyle, aFeatureSettings, aLanguageOverride, aUnicodeRanges, aFontDisplay); return entry.forget(); } #undef LOG_ENABLED #undef LOG