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gecko-dev/gfx/thebes/gfxPlatformFontList.cpp

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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 "mozilla/Logging.h"
#include "mozilla/gfx/Logging.h"
#include "mozilla/intl/Locale.h"
#include "mozilla/intl/LocaleService.h"
#include "mozilla/intl/OSPreferences.h"
#include "gfxPlatformFontList.h"
#include "gfxTextRun.h"
#include "gfxUserFontSet.h"
#include "SharedFontList-impl.h"
#include "GeckoProfiler.h"
#include "nsCRT.h"
#include "nsGkAtoms.h"
#include "nsPresContext.h"
#include "nsServiceManagerUtils.h"
#include "nsUnicharUtils.h"
#include "nsUnicodeProperties.h"
#include "nsXULAppAPI.h"
#include "mozilla/AppShutdown.h"
#include "mozilla/Attributes.h"
#include "mozilla/BinarySearch.h"
#include "mozilla/Likely.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/Mutex.h"
#include "mozilla/Preferences.h"
#include "mozilla/StaticPrefs_gfx.h"
#include "mozilla/StaticPrefs_layout.h"
#include "mozilla/Telemetry.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/dom/BlobImpl.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/ContentProcessMessageManager.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/ipc/FileDescriptorUtils.h"
#include "mozilla/ResultExtensions.h"
#include "mozilla/TextUtils.h"
#include "mozilla/Unused.h"
#include "base/eintr_wrapper.h"
#include <locale.h>
#include <numeric>
using namespace mozilla;
using mozilla::intl::Locale;
using mozilla::intl::LocaleParser;
using mozilla::intl::LocaleService;
using mozilla::intl::OSPreferences;
#define LOG_FONTLIST(args) \
MOZ_LOG(gfxPlatform::GetLog(eGfxLog_fontlist), LogLevel::Debug, args)
#define LOG_FONTLIST_ENABLED() \
MOZ_LOG_TEST(gfxPlatform::GetLog(eGfxLog_fontlist), LogLevel::Debug)
#define LOG_FONTINIT(args) \
MOZ_LOG(gfxPlatform::GetLog(eGfxLog_fontinit), LogLevel::Debug, args)
#define LOG_FONTINIT_ENABLED() \
MOZ_LOG_TEST(gfxPlatform::GetLog(eGfxLog_fontinit), LogLevel::Debug)
gfxPlatformFontList* gfxPlatformFontList::sPlatformFontList = nullptr;
// Character ranges that require complex-script shaping support in the font,
// and so should be masked out by ReadCMAP if the necessary layout tables
// are not present.
// Currently used by the Mac and FT2 implementations only, but probably should
// be supported on Windows as well.
const gfxFontEntry::ScriptRange gfxPlatformFontList::sComplexScriptRanges[] = {
// Actually, now that harfbuzz supports presentation-forms shaping for
// Arabic, we can render it without layout tables. So maybe we don't
// want to mask the basic Arabic block here?
// This affects the arabic-fallback-*.html reftests, which rely on
// loading a font that *doesn't* have any GSUB table.
{0x0600, 0x060B, 1, {TRUETYPE_TAG('a', 'r', 'a', 'b'), 0, 0}},
// skip 060C Arabic comma, also used by N'Ko etc
{0x060D, 0x061A, 1, {TRUETYPE_TAG('a', 'r', 'a', 'b'), 0, 0}},
// skip 061B Arabic semicolon, also used by N'Ko etc
{0x061C, 0x061E, 1, {TRUETYPE_TAG('a', 'r', 'a', 'b'), 0, 0}},
// skip 061F Arabic question mark, also used by N'Ko etc
{0x0620, 0x063F, 1, {TRUETYPE_TAG('a', 'r', 'a', 'b'), 0, 0}},
// skip 0640 Arabic tatweel (for syriac, adlam, etc)
{0x0641, 0x06D3, 1, {TRUETYPE_TAG('a', 'r', 'a', 'b'), 0, 0}},
// skip 06D4 Arabic full stop (for hanifi rohingya)
{0x06D5, 0x06FF, 1, {TRUETYPE_TAG('a', 'r', 'a', 'b'), 0, 0}},
{0x0700, 0x074F, 1, {TRUETYPE_TAG('s', 'y', 'r', 'c'), 0, 0}},
{0x0750, 0x077F, 1, {TRUETYPE_TAG('a', 'r', 'a', 'b'), 0, 0}},
{0x08A0, 0x08FF, 1, {TRUETYPE_TAG('a', 'r', 'a', 'b'), 0, 0}},
{0x0900,
0x0963,
2,
{TRUETYPE_TAG('d', 'e', 'v', '2'), TRUETYPE_TAG('d', 'e', 'v', 'a'), 0}},
// skip 0964 DEVANAGARI DANDA and 0965 DEVANAGARI DOUBLE DANDA, shared by
// various other Indic writing systems
{0x0966,
0x097F,
2,
{TRUETYPE_TAG('d', 'e', 'v', '2'), TRUETYPE_TAG('d', 'e', 'v', 'a'), 0}},
{0x0980,
0x09FF,
2,
{TRUETYPE_TAG('b', 'n', 'g', '2'), TRUETYPE_TAG('b', 'e', 'n', 'g'), 0}},
{0x0A00,
0x0A7F,
2,
{TRUETYPE_TAG('g', 'u', 'r', '2'), TRUETYPE_TAG('g', 'u', 'r', 'u'), 0}},
{0x0A80,
0x0AFF,
2,
{TRUETYPE_TAG('g', 'j', 'r', '2'), TRUETYPE_TAG('g', 'u', 'j', 'r'), 0}},
{0x0B00,
0x0B7F,
2,
{TRUETYPE_TAG('o', 'r', 'y', '2'), TRUETYPE_TAG('o', 'r', 'y', 'a'), 0}},
{0x0B80,
0x0BFF,
2,
{TRUETYPE_TAG('t', 'm', 'l', '2'), TRUETYPE_TAG('t', 'a', 'm', 'l'), 0}},
{0x0C00,
0x0C7F,
2,
{TRUETYPE_TAG('t', 'e', 'l', '2'), TRUETYPE_TAG('t', 'e', 'l', 'u'), 0}},
{0x0C80,
0x0CFF,
2,
{TRUETYPE_TAG('k', 'n', 'd', '2'), TRUETYPE_TAG('k', 'n', 'd', 'a'), 0}},
{0x0D00,
0x0D7F,
2,
{TRUETYPE_TAG('m', 'l', 'm', '2'), TRUETYPE_TAG('m', 'l', 'y', 'm'), 0}},
{0x0D80, 0x0DFF, 1, {TRUETYPE_TAG('s', 'i', 'n', 'h'), 0, 0}},
{0x0E80, 0x0EFF, 1, {TRUETYPE_TAG('l', 'a', 'o', ' '), 0, 0}},
{0x0F00, 0x0FFF, 1, {TRUETYPE_TAG('t', 'i', 'b', 't'), 0, 0}},
{0x1000,
0x109f,
2,
{TRUETYPE_TAG('m', 'y', 'm', 'r'), TRUETYPE_TAG('m', 'y', 'm', '2'), 0}},
{0x1780, 0x17ff, 1, {TRUETYPE_TAG('k', 'h', 'm', 'r'), 0, 0}},
// Khmer Symbols (19e0..19ff) don't seem to need any special shaping
{0xaa60,
0xaa7f,
2,
{TRUETYPE_TAG('m', 'y', 'm', 'r'), TRUETYPE_TAG('m', 'y', 'm', '2'), 0}},
// Thai seems to be "renderable" without AAT morphing tables
{0, 0, 0, {0, 0, 0}} // terminator
};
static const char* kObservedPrefs[] = {
"font.", "font.name-list.", "intl.accept_languages", // hmmmm...
"browser.display.use_document_fonts.icon_font_allowlist", nullptr};
static const char kFontSystemWhitelistPref[] = "font.system.whitelist";
static const char kCJKFallbackOrderPref[] = "font.cjk_pref_fallback_order";
// Pref for the list of icon font families that still get to override the
// default font from prefs, even when use_document_fonts is disabled.
// (This is to enable ligature-based icon fonts to keep working.)
static const char kIconFontsPref[] =
"browser.display.use_document_fonts.icon_font_allowlist";
// xxx - this can probably be eliminated by reworking pref font handling code
static const char* gPrefLangNames[] = {
#define FONT_PREF_LANG(enum_id_, str_, atom_id_) str_
#include "gfxFontPrefLangList.h"
#undef FONT_PREF_LANG
};
static_assert(MOZ_ARRAY_LENGTH(gPrefLangNames) == uint32_t(eFontPrefLang_Count),
"size of pref lang name array doesn't match pref lang enum size");
class gfxFontListPrefObserver final : public nsIObserver {
~gfxFontListPrefObserver() = default;
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
};
static void FontListPrefChanged(const char* aPref, void* aData = nullptr) {
// XXX this could be made to only clear out the cache for the prefs that were
// changed but it probably isn't that big a deal.
gfxPlatformFontList::PlatformFontList()->ClearLangGroupPrefFonts();
gfxPlatformFontList::PlatformFontList()->LoadIconFontOverrideList();
gfxFontCache::GetCache()->Flush();
}
static gfxFontListPrefObserver* gFontListPrefObserver = nullptr;
NS_IMPL_ISUPPORTS(gfxFontListPrefObserver, nsIObserver)
#define LOCALES_CHANGED_TOPIC "intl:system-locales-changed"
NS_IMETHODIMP
gfxFontListPrefObserver::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
NS_ASSERTION(!strcmp(aTopic, LOCALES_CHANGED_TOPIC), "invalid topic");
FontListPrefChanged(nullptr);
if (XRE_IsParentProcess()) {
gfxPlatform::ForceGlobalReflow(gfxPlatform::NeedsReframe::No);
}
return NS_OK;
}
MOZ_DEFINE_MALLOC_SIZE_OF(FontListMallocSizeOf)
NS_IMPL_ISUPPORTS(gfxPlatformFontList::MemoryReporter, nsIMemoryReporter)
NS_IMETHODIMP
gfxPlatformFontList::MemoryReporter::CollectReports(
nsIHandleReportCallback* aHandleReport, nsISupports* aData,
bool aAnonymize) {
FontListSizes sizes;
sizes.mFontListSize = 0;
sizes.mFontTableCacheSize = 0;
sizes.mCharMapsSize = 0;
sizes.mLoaderSize = 0;
sizes.mSharedSize = 0;
gfxPlatformFontList::PlatformFontList()->AddSizeOfIncludingThis(
&FontListMallocSizeOf, &sizes);
MOZ_COLLECT_REPORT(
"explicit/gfx/font-list", KIND_HEAP, UNITS_BYTES, sizes.mFontListSize,
"Memory used to manage the list of font families and faces.");
MOZ_COLLECT_REPORT(
"explicit/gfx/font-charmaps", KIND_HEAP, UNITS_BYTES, sizes.mCharMapsSize,
"Memory used to record the character coverage of individual fonts.");
if (sizes.mFontTableCacheSize) {
MOZ_COLLECT_REPORT(
"explicit/gfx/font-tables", KIND_HEAP, UNITS_BYTES,
sizes.mFontTableCacheSize,
"Memory used for cached font metrics and layout tables.");
}
if (sizes.mLoaderSize) {
MOZ_COLLECT_REPORT("explicit/gfx/font-loader", KIND_HEAP, UNITS_BYTES,
sizes.mLoaderSize,
"Memory used for (platform-specific) font loader.");
}
if (sizes.mSharedSize) {
MOZ_COLLECT_REPORT(
"font-list-shmem", KIND_NONHEAP, UNITS_BYTES, sizes.mSharedSize,
"Shared memory for system font list and character coverage data.");
}
return NS_OK;
}
PRThread* gfxPlatformFontList::sInitFontListThread = nullptr;
static void InitFontListCallback(void* aFontList) {
AUTO_PROFILER_REGISTER_THREAD("InitFontList");
PR_SetCurrentThreadName("InitFontList");
if (!static_cast<gfxPlatformFontList*>(aFontList)->InitFontList()) {
gfxPlatformFontList::Shutdown();
}
}
/* static */
bool gfxPlatformFontList::Initialize(gfxPlatformFontList* aList) {
sPlatformFontList = aList;
if (XRE_IsParentProcess() &&
StaticPrefs::gfx_font_list_omt_enabled_AtStartup() &&
StaticPrefs::gfx_e10s_font_list_shared_AtStartup() &&
!gfxPlatform::InSafeMode()) {
sInitFontListThread = PR_CreateThread(
PR_USER_THREAD, InitFontListCallback, aList, PR_PRIORITY_NORMAL,
PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
return true;
}
if (aList->InitFontList()) {
return true;
}
Shutdown();
return false;
}
gfxPlatformFontList::gfxPlatformFontList(bool aNeedFullnamePostscriptNames)
: mLock("gfxPlatformFontList lock"),
mFontFamilies(64),
mOtherFamilyNames(16),
mSharedCmaps(8) {
if (aNeedFullnamePostscriptNames) {
mExtraNames = MakeUnique<ExtraNames>();
}
mLangService = nsLanguageAtomService::GetService();
LoadBadUnderlineList();
LoadIconFontOverrideList();
mFontPrefs = MakeUnique<FontPrefs>();
gfxFontUtils::GetPrefsFontList(kFontSystemWhitelistPref, mEnabledFontsList);
mFontFamilyWhitelistActive = !mEnabledFontsList.IsEmpty();
// pref changes notification setup
NS_ASSERTION(!gFontListPrefObserver,
"There has been font list pref observer already");
gFontListPrefObserver = new gfxFontListPrefObserver();
NS_ADDREF(gFontListPrefObserver);
Preferences::RegisterPrefixCallbacks(FontListPrefChanged, kObservedPrefs);
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (obs) {
obs->AddObserver(gFontListPrefObserver, LOCALES_CHANGED_TOPIC, false);
}
// Only the parent process listens for whitelist changes; it will then
// notify its children to rebuild their font lists.
if (XRE_IsParentProcess()) {
Preferences::RegisterCallback(FontWhitelistPrefChanged,
kFontSystemWhitelistPref);
}
RegisterStrongMemoryReporter(new MemoryReporter());
// initialize lang group pref font defaults (i.e. serif/sans-serif)
mDefaultGenericsLangGroup.AppendElements(ArrayLength(gPrefLangNames));
for (uint32_t i = 0; i < ArrayLength(gPrefLangNames); i++) {
nsAutoCString prefDefaultFontType("font.default.");
prefDefaultFontType.Append(GetPrefLangName(eFontPrefLang(i)));
nsAutoCString serifOrSans;
Preferences::GetCString(prefDefaultFontType.get(), serifOrSans);
if (serifOrSans.EqualsLiteral("sans-serif")) {
mDefaultGenericsLangGroup[i] = StyleGenericFontFamily::SansSerif;
} else {
mDefaultGenericsLangGroup[i] = StyleGenericFontFamily::Serif;
}
}
}
gfxPlatformFontList::~gfxPlatformFontList() {
// Note that gfxPlatformFontList::Shutdown() ensures that the init-font-list
// thread is finished before we come here.
AutoLock lock(mLock);
// We can't just do mSharedCmaps.Clear() here because removing each item from
// the table would drop its last reference, and its Release() method would
// then call back to MaybeRemoveCmap to search for it, which we can't do
// while in the middle of clearing the table.
// So we first clear the "shared" flag in each entry, so Release() won't try
// to re-find them in the table.
for (auto iter = mSharedCmaps.ConstIter(); !iter.Done(); iter.Next()) {
iter.Get()->mCharMap->ClearSharedFlag();
}
mSharedCmaps.Clear();
ClearLangGroupPrefFontsLocked();
NS_ASSERTION(gFontListPrefObserver, "There is no font list pref observer");
Preferences::UnregisterPrefixCallbacks(FontListPrefChanged, kObservedPrefs);
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (obs) {
obs->RemoveObserver(gFontListPrefObserver, LOCALES_CHANGED_TOPIC);
}
if (XRE_IsParentProcess()) {
Preferences::UnregisterCallback(FontWhitelistPrefChanged,
kFontSystemWhitelistPref);
}
NS_RELEASE(gFontListPrefObserver);
}
/* static */
void gfxPlatformFontList::FontWhitelistPrefChanged(const char* aPref,
void* aClosure) {
MOZ_ASSERT(XRE_IsParentProcess());
auto* pfl = gfxPlatformFontList::PlatformFontList();
pfl->UpdateFontList(true);
dom::ContentParent::NotifyUpdatedFonts(true);
}
void gfxPlatformFontList::ApplyWhitelist() {
uint32_t numFonts = mEnabledFontsList.Length();
if (!mFontFamilyWhitelistActive) {
return;
}
nsTHashSet<nsCString> familyNamesWhitelist;
for (uint32_t i = 0; i < numFonts; i++) {
nsAutoCString key;
ToLowerCase(mEnabledFontsList[i], key);
familyNamesWhitelist.Insert(key);
}
AutoTArray<RefPtr<gfxFontFamily>, 128> accepted;
bool whitelistedFontFound = false;
for (const auto& entry : mFontFamilies) {
if (entry.GetData()->IsHidden()) {
// Hidden system fonts are exempt from whitelisting, but don't count
// towards determining whether we "kept" any (user-visible) fonts
accepted.AppendElement(entry.GetData());
continue;
}
nsAutoCString fontFamilyName(entry.GetKey());
ToLowerCase(fontFamilyName);
if (familyNamesWhitelist.Contains(fontFamilyName)) {
accepted.AppendElement(entry.GetData());
whitelistedFontFound = true;
}
}
if (!whitelistedFontFound) {
// No whitelisted fonts found! Ignore the whitelist.
return;
}
// Replace the original full list with the accepted subset.
mFontFamilies.Clear();
for (auto& f : accepted) {
nsAutoCString fontFamilyName(f->Name());
ToLowerCase(fontFamilyName);
mFontFamilies.InsertOrUpdate(fontFamilyName, std::move(f));
}
}
void gfxPlatformFontList::ApplyWhitelist(
nsTArray<fontlist::Family::InitData>& aFamilies) {
mLock.AssertCurrentThreadIn();
if (!mFontFamilyWhitelistActive) {
return;
}
nsTHashSet<nsCString> familyNamesWhitelist;
for (const auto& item : mEnabledFontsList) {
nsAutoCString key;
ToLowerCase(item, key);
familyNamesWhitelist.Insert(key);
}
AutoTArray<fontlist::Family::InitData, 128> accepted;
bool keptNonHidden = false;
for (auto& f : aFamilies) {
if (f.mVisibility == FontVisibility::Hidden ||
familyNamesWhitelist.Contains(f.mKey)) {
accepted.AppendElement(f);
if (f.mVisibility != FontVisibility::Hidden) {
keptNonHidden = true;
}
}
}
if (!keptNonHidden) {
// No (visible) families were whitelisted: ignore the whitelist
// and just leave the fontlist unchanged.
return;
}
aFamilies = std::move(accepted);
}
bool gfxPlatformFontList::FamilyInList(const nsACString& aName,
const char* aList[], size_t aCount) {
size_t result;
return BinarySearchIf(
aList, 0, aCount,
[&](const char* const aVal) -> int {
return nsCaseInsensitiveUTF8StringComparator(
aName.BeginReading(), aVal, aName.Length(), strlen(aVal));
},
&result);
}
void gfxPlatformFontList::CheckFamilyList(const char* aList[], size_t aCount) {
#ifdef DEBUG
MOZ_ASSERT(aCount > 0, "empty font family list?");
const char* a = aList[0];
uint32_t aLen = strlen(a);
for (size_t i = 1; i < aCount; ++i) {
const char* b = aList[i];
uint32_t bLen = strlen(b);
MOZ_ASSERT(nsCaseInsensitiveUTF8StringComparator(a, b, aLen, bLen) < 0,
"incorrectly sorted font family list!");
a = b;
aLen = bLen;
}
#endif
}
bool gfxPlatformFontList::AddWithLegacyFamilyName(const nsACString& aLegacyName,
gfxFontEntry* aFontEntry,
FontVisibility aVisibility) {
mLock.AssertCurrentThreadIn();
bool added = false;
nsAutoCString key;
ToLowerCase(aLegacyName, key);
mOtherFamilyNames
.LookupOrInsertWith(key,
[&] {
RefPtr<gfxFontFamily> family =
CreateFontFamily(aLegacyName, aVisibility);
// We don't want the family to search for faces,
// we're adding them directly here.
family->SetHasStyles(true);
// And we don't want it to attempt to search for
// legacy names, because we've already done that
// (and this is the result).
family->SetCheckedForLegacyFamilyNames(true);
added = true;
return family;
})
->AddFontEntry(aFontEntry->Clone());
return added;
}
bool gfxPlatformFontList::InitFontList() {
// If the startup font-list-init thread is still running, we need to wait
// for it to finish before trying to reinitialize here.
if (sInitFontListThread && !IsInitFontListThread()) {
PR_JoinThread(sInitFontListThread);
sInitFontListThread = nullptr;
}
AutoLock lock(mLock);
if (LOG_FONTINIT_ENABLED()) {
LOG_FONTINIT(("(fontinit) system fontlist initialization\n"));
}
if (IsInitialized()) {
// Font-list reinitialization always occurs on the main thread, in response
// to a change notification; it's only the initial creation during startup
// that may be on another thread.
MOZ_ASSERT(NS_IsMainThread());
// Rebuilding fontlist so clear out font/word caches.
gfxFontCache* fontCache = gfxFontCache::GetCache();
if (fontCache) {
fontCache->FlushShapedWordCaches();
fontCache->Flush();
}
gfxPlatform::PurgeSkiaFontCache();
// There's no need to broadcast this reflow request to child processes, as
// ContentParent::NotifyUpdatedFonts deals with it by re-entering into this
// function on child processes.
ForceGlobalReflowLocked(gfxPlatform::NeedsReframe::Yes,
gfxPlatform::BroadcastToChildren::No);
mAliasTable.Clear();
mLocalNameTable.Clear();
mIconFontsSet.Clear();
CancelLoadCmapsTask();
mStartedLoadingCmapsFrom = 0xffffffffu;
CancelInitOtherFamilyNamesTask();
mFontFamilies.Clear();
mOtherFamilyNames.Clear();
mOtherFamilyNamesInitialized = false;
if (mExtraNames) {
mExtraNames->mFullnames.Clear();
mExtraNames->mPostscriptNames.Clear();
}
mFaceNameListsInitialized = false;
ClearLangGroupPrefFontsLocked();
CancelLoader();
// Clear cached family records that will no longer be valid.
for (auto& f : mReplacementCharFallbackFamily) {
f = FontFamily();
}
gfxFontUtils::GetPrefsFontList(kFontSystemWhitelistPref, mEnabledFontsList);
mFontFamilyWhitelistActive = !mEnabledFontsList.IsEmpty();
LoadIconFontOverrideList();
}
// From here, gfxPlatformFontList::IsInitialized will return true,
// unless InitFontListForPlatform() fails and we reset it below.
mFontlistInitCount++;
InitializeCodepointsWithNoFonts();
// Try to initialize the cross-process shared font list if enabled by prefs,
// but not if we're running in Safe Mode.
if (StaticPrefs::gfx_e10s_font_list_shared_AtStartup() &&
!gfxPlatform::InSafeMode()) {
for (const auto& entry : mFontEntries.Values()) {
if (!entry) {
continue;
}
AutoWriteLock lock(entry->mLock);
entry->mShmemCharacterMap = nullptr;
entry->mShmemFace = nullptr;
entry->mFamilyName.Truncate();
}
mFontEntries.Clear();
mShmemCharMaps.Clear();
bool oldSharedList = mSharedFontList != nullptr;
mSharedFontList.reset(new fontlist::FontList(mFontlistInitCount));
InitSharedFontListForPlatform();
if (mSharedFontList && mSharedFontList->Initialized()) {
if (mLocalNameTable.Count()) {
SharedFontList()->SetLocalNames(mLocalNameTable);
mLocalNameTable.Clear();
}
} else {
// something went wrong, fall back to in-process list
gfxCriticalNote << "Failed to initialize shared font list, "
"falling back to in-process list.";
mSharedFontList.reset(nullptr);
}
if (oldSharedList && XRE_IsParentProcess()) {
// notify all children of the change
if (NS_IsMainThread()) {
dom::ContentParent::NotifyUpdatedFonts(true);
} else {
NS_DispatchToMainThread(NS_NewRunnableFunction(
"NotifyUpdatedFonts callback",
[] { dom::ContentParent::NotifyUpdatedFonts(true); }));
}
}
}
if (!SharedFontList()) {
if (NS_FAILED(InitFontListForPlatform())) {
mFontlistInitCount = 0;
return false;
}
ApplyWhitelist();
}
// Set up mDefaultFontEntry as a "last resort" default that we can use
// to avoid crashing if the font list is otherwise unusable.
gfxFontStyle defStyle;
FontFamily fam = GetDefaultFontLocked(nullptr, &defStyle);
gfxFontEntry* fe;
if (fam.mShared) {
auto face = fam.mShared->FindFaceForStyle(SharedFontList(), defStyle);
fe = face ? GetOrCreateFontEntryLocked(face, fam.mShared) : nullptr;
} else {
fe = fam.mUnshared->FindFontForStyle(defStyle);
}
mDefaultFontEntry = fe;
return true;
}
void gfxPlatformFontList::LoadIconFontOverrideList() {
mIconFontsSet.Clear();
AutoTArray<nsCString, 20> iconFontsList;
gfxFontUtils::GetPrefsFontList(kIconFontsPref, iconFontsList);
for (auto& name : iconFontsList) {
ToLowerCase(name);
mIconFontsSet.Insert(name);
}
}
void gfxPlatformFontList::InitializeCodepointsWithNoFonts() {
auto& first = mCodepointsWithNoFonts[FontVisibility(0)];
for (auto& bitset : mCodepointsWithNoFonts) {
if (&bitset == &first) {
bitset.reset();
bitset.SetRange(0, 0x1f); // C0 controls
bitset.SetRange(0x7f, 0x9f); // C1 controls
bitset.SetRange(0xE000, 0xF8FF); // PUA
bitset.SetRange(0xF0000, 0x10FFFD); // Supplementary PUA
bitset.SetRange(0xfdd0, 0xfdef); // noncharacters
for (unsigned i = 0; i <= 0x100000; i += 0x10000) {
bitset.SetRange(i + 0xfffe, i + 0xffff); // noncharacters
}
bitset.Compact();
} else {
bitset = first;
}
}
}
void gfxPlatformFontList::FontListChanged() {
MOZ_ASSERT(!XRE_IsParentProcess());
AutoLock lock(mLock);
InitializeCodepointsWithNoFonts();
if (SharedFontList()) {
// If we're using a shared local face-name list, this may have changed
// such that existing font entries held by user font sets are no longer
// safe to use: ensure they all get flushed.
RebuildLocalFonts(/*aForgetLocalFaces*/ true);
}
ForceGlobalReflowLocked(gfxPlatform::NeedsReframe::Yes);
}
void gfxPlatformFontList::GenerateFontListKey(const nsACString& aKeyName,
nsACString& aResult) {
aResult = aKeyName;
ToLowerCase(aResult);
}
// Used if a stylo thread wants to trigger InitOtherFamilyNames in the main
// process: we can't do IPC from the stylo thread so we post this to the main
// thread instead.
class InitOtherFamilyNamesForStylo : public mozilla::Runnable {
public:
explicit InitOtherFamilyNamesForStylo(bool aDeferOtherFamilyNamesLoading)
: Runnable("gfxPlatformFontList::InitOtherFamilyNamesForStylo"),
mDefer(aDeferOtherFamilyNamesLoading) {}
NS_IMETHOD Run() override {
auto pfl = gfxPlatformFontList::PlatformFontList();
auto list = pfl->SharedFontList();
if (!list) {
return NS_OK;
}
bool initialized = false;
dom::ContentChild::GetSingleton()->SendInitOtherFamilyNames(
list->GetGeneration(), mDefer, &initialized);
pfl->mOtherFamilyNamesInitialized.compareExchange(false, initialized);
return NS_OK;
}
private:
bool mDefer;
};
#define OTHERNAMES_TIMEOUT 200
bool gfxPlatformFontList::InitOtherFamilyNames(
bool aDeferOtherFamilyNamesLoading) {
if (mOtherFamilyNamesInitialized) {
return true;
}
if (SharedFontList() && !XRE_IsParentProcess()) {
if (NS_IsMainThread()) {
bool initialized;
dom::ContentChild::GetSingleton()->SendInitOtherFamilyNames(
SharedFontList()->GetGeneration(), aDeferOtherFamilyNamesLoading,
&initialized);
mOtherFamilyNamesInitialized.compareExchange(false, initialized);
} else {
NS_DispatchToMainThread(
new InitOtherFamilyNamesForStylo(aDeferOtherFamilyNamesLoading));
}
return mOtherFamilyNamesInitialized;
}
// If the font loader delay has been set to zero, we don't defer loading
// additional family names (regardless of the aDefer... parameter), as we
// take this to mean availability of font info is to be prioritized over
// potential startup perf or main-thread jank.
// (This is used so we can reliably run reftests that depend on localized
// font-family names being available.)
if (aDeferOtherFamilyNamesLoading &&
StaticPrefs::gfx_font_loader_delay_AtStartup() > 0) {
if (!mPendingOtherFamilyNameTask) {
RefPtr<mozilla::CancelableRunnable> task =
new InitOtherFamilyNamesRunnable();
mPendingOtherFamilyNameTask = task;
NS_DispatchToMainThreadQueue(task.forget(), EventQueuePriority::Idle);
}
} else {
InitOtherFamilyNamesInternal(false);
}
return mOtherFamilyNamesInitialized;
}
// time limit for loading facename lists (ms)
#define NAMELIST_TIMEOUT 200
gfxFontEntry* gfxPlatformFontList::SearchFamiliesForFaceName(
const nsACString& aFaceName) {
TimeStamp start = TimeStamp::Now();
bool timedOut = false;
// if mFirstChar is not 0, only load facenames for families
// that start with this character
char16_t firstChar = 0;
gfxFontEntry* lookup = nullptr;
// iterate over familes starting with the same letter
firstChar = ToLowerCase(aFaceName.CharAt(0));
for (const auto& entry : mFontFamilies) {
nsCStringHashKey::KeyType key = entry.GetKey();
const RefPtr<gfxFontFamily>& family = entry.GetData();
// when filtering, skip names that don't start with the filter character
if (firstChar && ToLowerCase(key.CharAt(0)) != firstChar) {
continue;
}
family->ReadFaceNames(this, NeedFullnamePostscriptNames());
TimeDuration elapsed = TimeStamp::Now() - start;
if (elapsed.ToMilliseconds() > NAMELIST_TIMEOUT) {
timedOut = true;
break;
}
}
lookup = FindFaceName(aFaceName);
TimeStamp end = TimeStamp::Now();
Telemetry::AccumulateTimeDelta(Telemetry::FONTLIST_INITFACENAMELISTS, start,
end);
if (LOG_FONTINIT_ENABLED()) {
TimeDuration elapsed = end - start;
LOG_FONTINIT(("(fontinit) SearchFamiliesForFaceName took %8.2f ms %s %s",
elapsed.ToMilliseconds(), (lookup ? "found name" : ""),
(timedOut ? "timeout" : "")));
}
return lookup;
}
gfxFontEntry* gfxPlatformFontList::FindFaceName(const nsACString& aFaceName) {
gfxFontEntry* lookup;
// lookup in name lookup tables, return null if not found
if (mExtraNames &&
((lookup = mExtraNames->mPostscriptNames.GetWeak(aFaceName)) ||
(lookup = mExtraNames->mFullnames.GetWeak(aFaceName)))) {
return lookup;
}
return nullptr;
}
gfxFontEntry* gfxPlatformFontList::LookupInFaceNameLists(
const nsACString& aFaceName) {
gfxFontEntry* lookup = nullptr;
// initialize facename lookup tables if needed
// note: this can terminate early or time out, in which case
// mFaceNameListsInitialized remains false
if (!mFaceNameListsInitialized) {
lookup = SearchFamiliesForFaceName(aFaceName);
if (lookup) {
return lookup;
}
}
// lookup in name lookup tables, return null if not found
if (!(lookup = FindFaceName(aFaceName))) {
// names not completely initialized, so keep track of lookup misses
if (!mFaceNameListsInitialized) {
if (!mFaceNamesMissed) {
mFaceNamesMissed = MakeUnique<nsTHashSet<nsCString>>(2);
}
mFaceNamesMissed->Insert(aFaceName);
}
}
return lookup;
}
gfxFontEntry* gfxPlatformFontList::LookupInSharedFaceNameList(
nsPresContext* aPresContext, const nsACString& aFaceName,
WeightRange aWeightForEntry, StretchRange aStretchForEntry,
SlantStyleRange aStyleForEntry) {
nsAutoCString keyName(aFaceName);
ToLowerCase(keyName);
fontlist::FontList* list = SharedFontList();
fontlist::Family* family = nullptr;
fontlist::Face* face = nullptr;
if (list->NumLocalFaces()) {
fontlist::LocalFaceRec* rec = list->FindLocalFace(keyName);
if (rec) {
auto* families = list->Families();
if (families) {
family = &families[rec->mFamilyIndex];
face = family->Faces(list)[rec->mFaceIndex].ToPtr<fontlist::Face>(list);
}
}
} else {
list->SearchForLocalFace(keyName, &family, &face);
}
if (!face || !family) {
return nullptr;
}
FontVisibility level =
aPresContext ? aPresContext->GetFontVisibility() : FontVisibility::User;
if (!IsVisibleToCSS(*family, level)) {
if (aPresContext) {
aPresContext->ReportBlockedFontFamily(*family);
}
return nullptr;
}
gfxFontEntry* fe = CreateFontEntry(face, family);
if (fe) {
fe->mIsLocalUserFont = true;
fe->mWeightRange = aWeightForEntry;
fe->mStretchRange = aStretchForEntry;
fe->mStyleRange = aStyleForEntry;
}
return fe;
}
void gfxPlatformFontList::LoadBadUnderlineList() {
gfxFontUtils::GetPrefsFontList("font.blacklist.underline_offset",
mBadUnderlineFamilyNames);
for (auto& fam : mBadUnderlineFamilyNames) {
ToLowerCase(fam);
}
mBadUnderlineFamilyNames.Compact();
mBadUnderlineFamilyNames.Sort();
}
void gfxPlatformFontList::UpdateFontList(bool aFullRebuild) {
MOZ_ASSERT(NS_IsMainThread());
if (aFullRebuild) {
InitFontList();
AutoLock lock(mLock);
RebuildLocalFonts();
} else {
// The font list isn't being fully rebuilt, we're just being notified that
// character maps have been updated and so font fallback needs to be re-
// done. We only care about this if we have previously encountered a
// fallback that required cmaps that were not yet available, and so we
// asked for the async cmap loader to run.
AutoLock lock(mLock);
if (mStartedLoadingCmapsFrom != 0xffffffffu) {
InitializeCodepointsWithNoFonts();
mStartedLoadingCmapsFrom = 0xffffffffu;
ForceGlobalReflowLocked(gfxPlatform::NeedsReframe::No);
}
}
}
bool gfxPlatformFontList::IsVisibleToCSS(const gfxFontFamily& aFamily,
FontVisibility aVisibility) const {
return aFamily.Visibility() <= aVisibility || IsFontFamilyWhitelistActive();
}
bool gfxPlatformFontList::IsVisibleToCSS(const fontlist::Family& aFamily,
FontVisibility aVisibility) const {
return aFamily.Visibility() <= aVisibility || IsFontFamilyWhitelistActive();
}
void gfxPlatformFontList::GetFontList(nsAtom* aLangGroup,
const nsACString& aGenericFamily,
nsTArray<nsString>& aListOfFonts) {
AutoLock lock(mLock);
if (SharedFontList()) {
fontlist::FontList* list = SharedFontList();
const fontlist::Family* families = list->Families();
if (families) {
for (uint32_t i = 0; i < list->NumFamilies(); i++) {
auto& f = families[i];
if (!IsVisibleToCSS(f, FontVisibility::User) || f.IsAltLocaleFamily()) {
continue;
}
// XXX TODO: filter families for aGenericFamily, if supported by
// platform
aListOfFonts.AppendElement(
NS_ConvertUTF8toUTF16(list->LocalizedFamilyName(&f)));
}
}
return;
}
for (const RefPtr<gfxFontFamily>& family : mFontFamilies.Values()) {
if (!IsVisibleToCSS(*family, FontVisibility::User)) {
continue;
}
if (family->FilterForFontList(aLangGroup, aGenericFamily)) {
nsAutoCString localizedFamilyName;
family->LocalizedName(localizedFamilyName);
aListOfFonts.AppendElement(NS_ConvertUTF8toUTF16(localizedFamilyName));
}
}
aListOfFonts.Sort();
aListOfFonts.Compact();
}
void gfxPlatformFontList::GetFontFamilyList(
nsTArray<RefPtr<gfxFontFamily>>& aFamilyArray) {
AutoLock lock(mLock);
MOZ_ASSERT(aFamilyArray.IsEmpty());
// This doesn't use ToArray, because the caller passes an AutoTArray.
aFamilyArray.SetCapacity(mFontFamilies.Count());
for (const auto& family : mFontFamilies.Values()) {
aFamilyArray.AppendElement(family);
}
}
already_AddRefed<gfxFont> gfxPlatformFontList::SystemFindFontForChar(
nsPresContext* aPresContext, uint32_t aCh, uint32_t aNextCh,
Script aRunScript, eFontPresentation aPresentation,
const gfxFontStyle* aStyle, FontVisibility* aVisibility) {
AutoLock lock(mLock);
FontVisibility level =
aPresContext ? aPresContext->GetFontVisibility() : FontVisibility::User;
MOZ_ASSERT(!mCodepointsWithNoFonts[level].test(aCh),
"don't call for codepoints already known to be unsupported");
// Try to short-circuit font fallback for U+FFFD, used to represent
// encoding errors: just use cached family from last time U+FFFD was seen.
// This helps speed up pages with lots of encoding errors, binary-as-text,
// etc.
if (aCh == 0xFFFD) {
gfxFontEntry* fontEntry = nullptr;
auto& fallbackFamily = mReplacementCharFallbackFamily[level];
if (fallbackFamily.mShared) {
fontlist::Face* face =
fallbackFamily.mShared->FindFaceForStyle(SharedFontList(), *aStyle);
if (face) {
fontEntry = GetOrCreateFontEntryLocked(face, fallbackFamily.mShared);
*aVisibility = fallbackFamily.mShared->Visibility();
}
} else if (fallbackFamily.mUnshared) {
fontEntry = fallbackFamily.mUnshared->FindFontForStyle(*aStyle);
*aVisibility = fallbackFamily.mUnshared->Visibility();
}
// this should never fail, as we must have found U+FFFD in order to set
// mReplacementCharFallbackFamily[...] at all, but better play it safe
if (fontEntry && fontEntry->HasCharacter(aCh)) {
return fontEntry->FindOrMakeFont(aStyle);
}
}
TimeStamp start = TimeStamp::Now();
// search commonly available fonts
bool common = true;
FontFamily fallbackFamily;
RefPtr<gfxFont> candidate =
CommonFontFallback(aPresContext, aCh, aNextCh, aRunScript, aPresentation,
aStyle, fallbackFamily);
RefPtr<gfxFont> font;
if (candidate) {
if (aPresentation == eFontPresentation::Any) {
font = std::move(candidate);
} else {
bool hasColorGlyph = candidate->HasColorGlyphFor(aCh, aNextCh);
if (hasColorGlyph == PrefersColor(aPresentation)) {
font = std::move(candidate);
}
}
}
// If we didn't find a common font, or it was not the preferred type (color
// or monochrome), do system-wide fallback (except for specials).
uint32_t cmapCount = 0;
if (!font) {
common = false;
font = GlobalFontFallback(aPresContext, aCh, aNextCh, aRunScript,
aPresentation, aStyle, cmapCount, fallbackFamily);
// If the font we found doesn't match the requested type, and we also found
// a candidate above, prefer that one.
if (font && aPresentation != eFontPresentation::Any && candidate) {
bool hasColorGlyph = font->HasColorGlyphFor(aCh, aNextCh);
if (hasColorGlyph != PrefersColor(aPresentation)) {
font = std::move(candidate);
}
}
}
TimeDuration elapsed = TimeStamp::Now() - start;
LogModule* log = gfxPlatform::GetLog(eGfxLog_textrun);
if (MOZ_UNLIKELY(MOZ_LOG_TEST(log, LogLevel::Warning))) {
Script script = intl::UnicodeProperties::GetScriptCode(aCh);
MOZ_LOG(log, LogLevel::Warning,
("(textrun-systemfallback-%s) char: u+%6.6x "
"script: %d match: [%s]"
" time: %dus cmaps: %d\n",
(common ? "common" : "global"), aCh, static_cast<int>(script),
(font ? font->GetFontEntry()->Name().get() : "<none>"),
int32_t(elapsed.ToMicroseconds()), cmapCount));
}
// no match? add to set of non-matching codepoints
if (!font) {
mCodepointsWithNoFonts[level].set(aCh);
} else {
*aVisibility = fallbackFamily.mShared
? fallbackFamily.mShared->Visibility()
: fallbackFamily.mUnshared->Visibility();
if (aCh == 0xFFFD) {
mReplacementCharFallbackFamily[level] = fallbackFamily;
}
}
// track system fallback time
static bool first = true;
int32_t intElapsed =
int32_t(first ? elapsed.ToMilliseconds() : elapsed.ToMicroseconds());
Telemetry::Accumulate((first ? Telemetry::SYSTEM_FONT_FALLBACK_FIRST
: Telemetry::SYSTEM_FONT_FALLBACK),
intElapsed);
first = false;
// track the script for which fallback occurred (incremented one make it
// 1-based)
Telemetry::Accumulate(Telemetry::SYSTEM_FONT_FALLBACK_SCRIPT,
int(aRunScript) + 1);
return font.forget();
}
#define NUM_FALLBACK_FONTS 8
already_AddRefed<gfxFont> gfxPlatformFontList::CommonFontFallback(
nsPresContext* aPresContext, uint32_t aCh, uint32_t aNextCh,
Script aRunScript, eFontPresentation aPresentation,
const gfxFontStyle* aMatchStyle, FontFamily& aMatchedFamily) {
AutoTArray<const char*, NUM_FALLBACK_FONTS> defaultFallbacks;
gfxPlatform::GetPlatform()->GetCommonFallbackFonts(
aCh, aRunScript, aPresentation, defaultFallbacks);
GlobalFontMatch data(aCh, aNextCh, *aMatchStyle, aPresentation);
FontVisibility level =
aPresContext ? aPresContext->GetFontVisibility() : FontVisibility::User;
// If a color-emoji presentation is requested, we will check any font found
// to see if it can provide this; if not, we'll remember it as a possible
// candidate but search the remainder of the list for a better choice.
RefPtr<gfxFont> candidateFont;
FontFamily candidateFamily;
auto check = [&](gfxFontEntry* aFontEntry,
FontFamily aFamily) -> already_AddRefed<gfxFont> {
RefPtr<gfxFont> font = aFontEntry->FindOrMakeFont(aMatchStyle);
if (aPresentation < eFontPresentation::EmojiDefault ||
font->HasColorGlyphFor(aCh, aNextCh)) {
aMatchedFamily = aFamily;
return font.forget();
}
// We want a color glyph but this font only has monochrome; remember it
// (unless we already have a candidate) but continue to search.
if (!candidateFont) {
candidateFont = std::move(font);
candidateFamily = aFamily;
}
return nullptr;
};
if (SharedFontList()) {
for (const auto name : defaultFallbacks) {
fontlist::Family* family =
FindSharedFamily(aPresContext, nsDependentCString(name));
if (!family || !IsVisibleToCSS(*family, level)) {
continue;
}
// XXX(jfkthame) Should we fire the async cmap-loader here, or let it
// always do a potential sync initialization of the family?
family->SearchAllFontsForChar(SharedFontList(), &data);
if (data.mBestMatch) {
RefPtr<gfxFont> font = check(data.mBestMatch, FontFamily(family));
if (font) {
return font.forget();
}
}
}
} else {
for (const auto name : defaultFallbacks) {
gfxFontFamily* fallback =
FindFamilyByCanonicalName(nsDependentCString(name));
if (!fallback || !IsVisibleToCSS(*fallback, level)) {
continue;
}
fallback->FindFontForChar(&data);
if (data.mBestMatch) {
RefPtr<gfxFont> font = check(data.mBestMatch, FontFamily(fallback));
if (font) {
return font.forget();
}
}
}
}
// If we had a candidate that supports the character, but doesn't have the
// desired emoji-style glyph, we'll return it anyhow as nothing better was
// found.
if (candidateFont) {
aMatchedFamily = candidateFamily;
return candidateFont.forget();
}
return nullptr;
}
already_AddRefed<gfxFont> gfxPlatformFontList::GlobalFontFallback(
nsPresContext* aPresContext, uint32_t aCh, uint32_t aNextCh,
Script aRunScript, eFontPresentation aPresentation,
const gfxFontStyle* aMatchStyle, uint32_t& aCmapCount,
FontFamily& aMatchedFamily) {
bool useCmaps = IsFontFamilyWhitelistActive() ||
gfxPlatform::GetPlatform()->UseCmapsDuringSystemFallback();
FontVisibility level =
aPresContext ? aPresContext->GetFontVisibility() : FontVisibility::User;
if (!useCmaps) {
// Allow platform-specific fallback code to try and find a usable font
gfxFontEntry* fe = PlatformGlobalFontFallback(aPresContext, aCh, aRunScript,
aMatchStyle, aMatchedFamily);
if (fe) {
if (aMatchedFamily.mShared) {
if (IsVisibleToCSS(*aMatchedFamily.mShared, level)) {
RefPtr<gfxFont> font = fe->FindOrMakeFont(aMatchStyle);
if (font) {
if (aPresentation == eFontPresentation::Any) {
return font.forget();
}
bool hasColorGlyph = font->HasColorGlyphFor(aCh, aNextCh);
if (hasColorGlyph == PrefersColor(aPresentation)) {
return font.forget();
}
}
}
} else {
if (IsVisibleToCSS(*aMatchedFamily.mUnshared, level)) {
RefPtr<gfxFont> font = fe->FindOrMakeFont(aMatchStyle);
if (font) {
if (aPresentation == eFontPresentation::Any) {
return font.forget();
}
bool hasColorGlyph = font->HasColorGlyphFor(aCh, aNextCh);
if (hasColorGlyph == PrefersColor(aPresentation)) {
return font.forget();
}
}
}
}
}
}
// otherwise, try to find it among local fonts
GlobalFontMatch data(aCh, aNextCh, *aMatchStyle, aPresentation);
if (SharedFontList()) {
fontlist::Family* families = SharedFontList()->Families();
if (families) {
for (uint32_t i = 0; i < SharedFontList()->NumFamilies(); i++) {
fontlist::Family& family = families[i];
if (!IsVisibleToCSS(family, level)) {
continue;
}
if (!family.IsFullyInitialized() &&
StaticPrefs::gfx_font_rendering_fallback_async() &&
!XRE_IsParentProcess()) {
// Start loading all the missing charmaps; but this is async,
// so for now we just continue, ignoring this family.
StartCmapLoadingFromFamily(i);
} else {
family.SearchAllFontsForChar(SharedFontList(), &data);
if (data.mMatchDistance == 0.0) {
// no better style match is possible, so stop searching
break;
}
}
}
if (data.mBestMatch) {
aMatchedFamily = FontFamily(data.mMatchedSharedFamily);
return data.mBestMatch->FindOrMakeFont(aMatchStyle);
}
}
} else {
// iterate over all font families to find a font that support the
// character
for (const RefPtr<gfxFontFamily>& family : mFontFamilies.Values()) {
if (!IsVisibleToCSS(*family, level)) {
continue;
}
// evaluate all fonts in this family for a match
family->FindFontForChar(&data);
if (data.mMatchDistance == 0.0) {
// no better style match is possible, so stop searching
break;
}
}
aCmapCount = data.mCmapsTested;
if (data.mBestMatch) {
aMatchedFamily = FontFamily(data.mMatchedFamily);
return data.mBestMatch->FindOrMakeFont(aMatchStyle);
}
}
return nullptr;
}
class StartCmapLoadingRunnable : public mozilla::Runnable {
public:
explicit StartCmapLoadingRunnable(uint32_t aStartIndex)
: Runnable("gfxPlatformFontList::StartCmapLoadingRunnable"),
mStartIndex(aStartIndex) {}
NS_IMETHOD Run() override {
auto* pfl = gfxPlatformFontList::PlatformFontList();
auto* list = pfl->SharedFontList();
if (!list) {
return NS_OK;
}
if (mStartIndex >= list->NumFamilies()) {
return NS_OK;
}
if (XRE_IsParentProcess()) {
pfl->StartCmapLoading(list->GetGeneration(), mStartIndex);
} else {
dom::ContentChild::GetSingleton()->SendStartCmapLoading(
list->GetGeneration(), mStartIndex);
}
return NS_OK;
}
private:
uint32_t mStartIndex;
};
void gfxPlatformFontList::StartCmapLoadingFromFamily(uint32_t aStartIndex) {
AutoLock lock(mLock);
if (aStartIndex > mStartedLoadingCmapsFrom) {
// We already initiated cmap-loading from somewhere earlier in the list;
// no need to do it again here.
return;
}
mStartedLoadingCmapsFrom = aStartIndex;
// If we're already on the main thread, don't bother dispatching a runnable
// here to kick off the loading process, just do it directly.
if (NS_IsMainThread()) {
auto* list = SharedFontList();
if (XRE_IsParentProcess()) {
StartCmapLoading(list->GetGeneration(), aStartIndex);
} else {
dom::ContentChild::GetSingleton()->SendStartCmapLoading(
list->GetGeneration(), aStartIndex);
}
} else {
NS_DispatchToMainThread(new StartCmapLoadingRunnable(aStartIndex));
}
}
class LoadCmapsRunnable : public CancelableRunnable {
class WillShutdownObserver : public nsIObserver {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
explicit WillShutdownObserver(LoadCmapsRunnable* aRunnable)
: mRunnable(aRunnable) {}
void Remove() {
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (obs) {
obs->RemoveObserver(this, NS_XPCOM_WILL_SHUTDOWN_OBSERVER_ID);
}
mRunnable = nullptr;
}
protected:
virtual ~WillShutdownObserver() = default;
LoadCmapsRunnable* mRunnable;
};
public:
explicit LoadCmapsRunnable(uint32_t aGeneration, uint32_t aFamilyIndex)
: CancelableRunnable("gfxPlatformFontList::LoadCmapsRunnable"),
mGeneration(aGeneration),
mStartIndex(aFamilyIndex),
mIndex(aFamilyIndex) {
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (obs) {
mObserver = new WillShutdownObserver(this);
obs->AddObserver(mObserver, NS_XPCOM_WILL_SHUTDOWN_OBSERVER_ID, false);
}
}
virtual ~LoadCmapsRunnable() {
if (mObserver) {
mObserver->Remove();
}
}
// Reset the current family index, if the value passed is earlier than our
// original starting position. We don't "reset" if it would move the current
// position forward, or back into the already-scanned range.
// We could optimize further by remembering the current position reached,
// and then skipping ahead from the original start, but it doesn't seem worth
// extra complexity for a task that usually only happens once, and already-
// processed families will be skipped pretty quickly in Run() anyhow.
void MaybeResetIndex(uint32_t aFamilyIndex) {
if (aFamilyIndex < mStartIndex) {
mStartIndex = aFamilyIndex;
mIndex = aFamilyIndex;
}
}
nsresult Cancel() override {
mIsCanceled = true;
return NS_OK;
}
NS_IMETHOD Run() override {
if (mIsCanceled) {
return NS_OK;
}
auto* pfl = gfxPlatformFontList::PlatformFontList();
auto* list = pfl->SharedFontList();
MOZ_ASSERT(list);
if (!list) {
return NS_OK;
}
if (mGeneration != list->GetGeneration()) {
return NS_OK;
}
uint32_t numFamilies = list->NumFamilies();
if (mIndex >= numFamilies) {
return NS_OK;
}
auto* families = list->Families();
// Skip any families that are already initialized.
while (mIndex < numFamilies && families[mIndex].IsFullyInitialized()) {
++mIndex;
}
// Fully process one family, and advance index.
if (mIndex < numFamilies) {
Unused << pfl->InitializeFamily(&families[mIndex], true);
++mIndex;
}
// If there are more families to initialize, post ourselves back to the
// idle queue to handle the next one; otherwise we're finished and we need
// to notify content processes to update their rendering.
if (mIndex < numFamilies) {
RefPtr<CancelableRunnable> task = this;
NS_DispatchToMainThreadQueue(task.forget(), EventQueuePriority::Idle);
} else {
pfl->Lock();
pfl->CancelLoadCmapsTask();
pfl->InitializeCodepointsWithNoFonts();
dom::ContentParent::NotifyUpdatedFonts(false);
pfl->Unlock();
}
return NS_OK;
}
private:
uint32_t mGeneration;
uint32_t mStartIndex;
uint32_t mIndex;
bool mIsCanceled = false;
RefPtr<WillShutdownObserver> mObserver;
};
NS_IMPL_ISUPPORTS(LoadCmapsRunnable::WillShutdownObserver, nsIObserver)
NS_IMETHODIMP
LoadCmapsRunnable::WillShutdownObserver::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aData) {
if (!nsCRT::strcmp(aTopic, NS_XPCOM_WILL_SHUTDOWN_OBSERVER_ID)) {
if (mRunnable) {
mRunnable->Cancel();
}
} else {
MOZ_ASSERT_UNREACHABLE("unexpected notification topic");
}
return NS_OK;
}
void gfxPlatformFontList::StartCmapLoading(uint32_t aGeneration,
uint32_t aStartIndex) {
MOZ_RELEASE_ASSERT(XRE_IsParentProcess());
if (aGeneration != SharedFontList()->GetGeneration()) {
return;
}
if (AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed)) {
return;
}
if (mLoadCmapsRunnable) {
// We already have a runnable; just make sure it covers the full range of
// families needed.
static_cast<LoadCmapsRunnable*>(mLoadCmapsRunnable.get())
->MaybeResetIndex(aStartIndex);
return;
}
mLoadCmapsRunnable = new LoadCmapsRunnable(aGeneration, aStartIndex);
RefPtr<CancelableRunnable> task = mLoadCmapsRunnable;
NS_DispatchToMainThreadQueue(task.forget(), EventQueuePriority::Idle);
}
gfxFontFamily* gfxPlatformFontList::CheckFamily(gfxFontFamily* aFamily) {
if (aFamily && !aFamily->HasStyles()) {
aFamily->FindStyleVariations();
}
if (aFamily && aFamily->FontListLength() == 0) {
// Failed to load any faces for this family, so discard it.
nsAutoCString key;
GenerateFontListKey(aFamily->Name(), key);
mFontFamilies.Remove(key);
return nullptr;
}
return aFamily;
}
bool gfxPlatformFontList::FindAndAddFamilies(
nsPresContext* aPresContext, StyleGenericFontFamily aGeneric,
const nsACString& aFamily, nsTArray<FamilyAndGeneric>* aOutput,
FindFamiliesFlags aFlags, gfxFontStyle* aStyle, nsAtom* aLanguage,
gfxFloat aDevToCssSize) {
AutoLock lock(mLock);
#ifdef DEBUG
auto initialLength = aOutput->Length();
#endif
bool didFind =
FindAndAddFamiliesLocked(aPresContext, aGeneric, aFamily, aOutput, aFlags,
aStyle, aLanguage, aDevToCssSize);
#ifdef DEBUG
auto finalLength = aOutput->Length();
// Validate the expectation that the output-array grows if we return true,
// or remains the same (probably empty) if we return false.
MOZ_ASSERT_IF(didFind, finalLength > initialLength);
MOZ_ASSERT_IF(!didFind, finalLength == initialLength);
#endif
return didFind;
}
bool gfxPlatformFontList::FindAndAddFamiliesLocked(
nsPresContext* aPresContext, StyleGenericFontFamily aGeneric,
const nsACString& aFamily, nsTArray<FamilyAndGeneric>* aOutput,
FindFamiliesFlags aFlags, gfxFontStyle* aStyle, nsAtom* aLanguage,
gfxFloat aDevToCssSize) {
nsAutoCString key;
GenerateFontListKey(aFamily, key);
bool allowHidden = bool(aFlags & FindFamiliesFlags::eSearchHiddenFamilies);
FontVisibility visibilityLevel =
aPresContext ? aPresContext->GetFontVisibility() : FontVisibility::User;
if (SharedFontList()) {
fontlist::Family* family = SharedFontList()->FindFamily(key);
// If not found, and other family names have not yet been initialized,
// initialize the rest of the list and try again. This is done lazily
// since reading name table entries is expensive.
// Although ASCII localized family names are possible they don't occur
// in practice, so avoid pulling in names at startup.
if (!family && !mOtherFamilyNamesInitialized) {
bool triggerLoading = true;
bool mayDefer =
!(aFlags & FindFamiliesFlags::eForceOtherFamilyNamesLoading);
if (IsAscii(key)) {
// If `key` is an ASCII name, only trigger loading if it includes a
// space, and the "base" name (up to the last space) exists as a known
// family, so that this might be a legacy styled-family name.
const char* data = key.BeginReading();
int32_t index = key.Length();
while (--index > 0) {
if (data[index] == ' ') {
break;
}
}
if (index <= 0 ||
!SharedFontList()->FindFamily(nsAutoCString(key.get(), index))) {
triggerLoading = false;
}
}
if (triggerLoading) {
if (InitOtherFamilyNames(mayDefer)) {
family = SharedFontList()->FindFamily(key);
}
}
if (!family && !mOtherFamilyNamesInitialized &&
!(aFlags & FindFamiliesFlags::eNoAddToNamesMissedWhenSearching)) {
AddToMissedNames(key);
}
}
// Check whether the family we found is actually allowed to be looked up,
// according to current font-visibility prefs.
if (family) {
bool visible = IsVisibleToCSS(*family, visibilityLevel);
if (visible || (allowHidden && family->IsHidden())) {
aOutput->AppendElement(FamilyAndGeneric(family, aGeneric));
return true;
}
if (aPresContext) {
aPresContext->ReportBlockedFontFamily(*family);
}
}
return false;
}
NS_ASSERTION(mFontFamilies.Count() != 0,
"system font list was not initialized correctly");
auto isBlockedByVisibilityLevel = [=](gfxFontFamily* aFamily) -> bool {
bool visible = IsVisibleToCSS(*aFamily, visibilityLevel);
if (visible || (allowHidden && aFamily->IsHidden())) {
return false;
}
if (aPresContext) {
aPresContext->ReportBlockedFontFamily(*aFamily);
}
return true;
};
// lookup in canonical (i.e. English) family name list
gfxFontFamily* familyEntry = mFontFamilies.GetWeak(key);
if (familyEntry) {
if (isBlockedByVisibilityLevel(familyEntry)) {
return false;
}
}
// if not found, lookup in other family names list (mostly localized names)
if (!familyEntry) {
familyEntry = mOtherFamilyNames.GetWeak(key);
}
if (familyEntry) {
if (isBlockedByVisibilityLevel(familyEntry)) {
return false;
}
}
// if still not found and other family names not yet fully initialized,
// initialize the rest of the list and try again. this is done lazily
// since reading name table entries is expensive.
// although ASCII localized family names are possible they don't occur
// in practice so avoid pulling in names at startup
if (!familyEntry && !mOtherFamilyNamesInitialized && !IsAscii(aFamily)) {
InitOtherFamilyNames(
!(aFlags & FindFamiliesFlags::eForceOtherFamilyNamesLoading));
familyEntry = mOtherFamilyNames.GetWeak(key);
if (!familyEntry && !mOtherFamilyNamesInitialized &&
!(aFlags & FindFamiliesFlags::eNoAddToNamesMissedWhenSearching)) {
// localized family names load timed out, add name to list of
// names to check after localized names are loaded
AddToMissedNames(key);
}
if (familyEntry) {
if (isBlockedByVisibilityLevel(familyEntry)) {
return false;
}
}
}
familyEntry = CheckFamily(familyEntry);
// If we failed to find the requested family, check for a space in the
// name; if found, and if the "base" name (up to the last space) exists
// as a family, then this might be a legacy GDI-style family name for
// an additional weight/width. Try searching the faces of the base family
// and create any corresponding legacy families.
if (!familyEntry &&
!(aFlags & FindFamiliesFlags::eNoSearchForLegacyFamilyNames)) {
// We don't have nsAString::RFindChar, so look for a space manually
const char* data = aFamily.BeginReading();
int32_t index = aFamily.Length();
while (--index > 0) {
if (data[index] == ' ') {
break;
}
}
if (index > 0) {
gfxFontFamily* base =
FindUnsharedFamily(aPresContext, Substring(aFamily, 0, index),
FindFamiliesFlags::eNoSearchForLegacyFamilyNames);
// If we found the "base" family name, and if it has members with
// legacy names, this will add corresponding font-family entries to
// the mOtherFamilyNames list; then retry the legacy-family search.
if (base && base->CheckForLegacyFamilyNames(this)) {
familyEntry = mOtherFamilyNames.GetWeak(key);
}
if (familyEntry) {
if (isBlockedByVisibilityLevel(familyEntry)) {
return false;
}
}
}
}
if (familyEntry) {
aOutput->AppendElement(FamilyAndGeneric(familyEntry, aGeneric));
return true;
}
return false;
}
void gfxPlatformFontList::AddToMissedNames(const nsCString& aKey) {
if (!mOtherNamesMissed) {
mOtherNamesMissed = MakeUnique<nsTHashSet<nsCString>>(2);
}
mOtherNamesMissed->Insert(aKey);
}
fontlist::Family* gfxPlatformFontList::FindSharedFamily(
nsPresContext* aPresContext, const nsACString& aFamily,
FindFamiliesFlags aFlags, gfxFontStyle* aStyle, nsAtom* aLanguage,
gfxFloat aDevToCss) {
if (!SharedFontList()) {
return nullptr;
}
AutoTArray<FamilyAndGeneric, 1> families;
if (!FindAndAddFamiliesLocked(aPresContext, StyleGenericFontFamily::None,
aFamily, &families, aFlags, aStyle, aLanguage,
aDevToCss) ||
!families[0].mFamily.mShared) {
return nullptr;
}
fontlist::Family* family = families[0].mFamily.mShared;
if (!family->IsInitialized()) {
if (!InitializeFamily(family)) {
return nullptr;
}
}
return family;
}
class InitializeFamilyRunnable : public mozilla::Runnable {
public:
explicit InitializeFamilyRunnable(uint32_t aFamilyIndex, bool aLoadCmaps)
: Runnable("gfxPlatformFontList::InitializeFamilyRunnable"),
mIndex(aFamilyIndex),
mLoadCmaps(aLoadCmaps) {}
NS_IMETHOD Run() override {
auto list = gfxPlatformFontList::PlatformFontList()->SharedFontList();
if (!list) {
return NS_OK;
}
if (mIndex >= list->NumFamilies()) {
// Out of range? Maybe the list got reinitialized since this request
// was posted - just ignore it.
return NS_OK;
}
dom::ContentChild::GetSingleton()->SendInitializeFamily(
list->GetGeneration(), mIndex, mLoadCmaps);
return NS_OK;
}
private:
uint32_t mIndex;
bool mLoadCmaps;
};
bool gfxPlatformFontList::InitializeFamily(fontlist::Family* aFamily,
bool aLoadCmaps) {
MOZ_ASSERT(SharedFontList());
auto list = SharedFontList();
if (!XRE_IsParentProcess()) {
auto* families = list->Families();
if (!families) {
return false;
}
uint32_t index = aFamily - families;
if (index >= list->NumFamilies()) {
return false;
}
if (NS_IsMainThread()) {
dom::ContentChild::GetSingleton()->SendInitializeFamily(
list->GetGeneration(), index, aLoadCmaps);
} else {
NS_DispatchToMainThread(new InitializeFamilyRunnable(index, aLoadCmaps));
}
return aFamily->IsInitialized();
}
if (!aFamily->IsInitialized()) {
// The usual case: we're being asked to populate the face list.
AutoTArray<fontlist::Face::InitData, 16> faceList;
GetFacesInitDataForFamily(aFamily, faceList, aLoadCmaps);
aFamily->AddFaces(list, faceList);
} else {
// The family's face list was already initialized, but if aLoadCmaps is
// true we also want to eagerly load character maps. This is used when a
// child process is doing SearchAllFontsForChar, to have the parent load
// all the cmaps at once and reduce IPC traffic (and content-process file
// access overhead, which is crippling for DirectWrite on Windows).
if (aLoadCmaps) {
auto* faces = aFamily->Faces(list);
if (faces) {
for (size_t i = 0; i < aFamily->NumFaces(); i++) {
auto* face = faces[i].ToPtr<fontlist::Face>(list);
if (face && face->mCharacterMap.IsNull()) {
// We don't want to cache this font entry, as the parent will most
// likely never use it again; it's just to populate the charmap for
// the benefit of the child process.
RefPtr<gfxFontEntry> fe = CreateFontEntry(face, aFamily);
if (fe) {
fe->ReadCMAP();
}
}
}
}
}
}
if (aLoadCmaps && aFamily->IsInitialized()) {
aFamily->SetupFamilyCharMap(list);
}
return aFamily->IsInitialized();
}
gfxFontEntry* gfxPlatformFontList::FindFontForFamily(
nsPresContext* aPresContext, const nsACString& aFamily,
const gfxFontStyle* aStyle) {
AutoLock lock(mLock);
nsAutoCString key;
GenerateFontListKey(aFamily, key);
FontFamily family = FindFamily(aPresContext, key);
if (family.IsNull()) {
return nullptr;
}
if (family.mShared) {
auto face = family.mShared->FindFaceForStyle(SharedFontList(), *aStyle);
if (!face) {
return nullptr;
}
return GetOrCreateFontEntryLocked(face, family.mShared);
}
return family.mUnshared->FindFontForStyle(*aStyle);
}
gfxFontEntry* gfxPlatformFontList::GetOrCreateFontEntryLocked(
fontlist::Face* aFace, const fontlist::Family* aFamily) {
return mFontEntries
.LookupOrInsertWith(aFace,
[=] { return CreateFontEntry(aFace, aFamily); })
.get();
}
void gfxPlatformFontList::AddOtherFamilyNames(
gfxFontFamily* aFamilyEntry, const nsTArray<nsCString>& aOtherFamilyNames) {
AutoLock lock(mLock);
for (const auto& name : aOtherFamilyNames) {
nsAutoCString key;
GenerateFontListKey(name, key);
mOtherFamilyNames.LookupOrInsertWith(key, [&] {
LOG_FONTLIST(
("(fontlist-otherfamily) canonical family: %s, other family: %s\n",
aFamilyEntry->Name().get(), name.get()));
if (mBadUnderlineFamilyNames.ContainsSorted(key)) {
aFamilyEntry->SetBadUnderlineFamily();
}
return RefPtr{aFamilyEntry};
});
}
}
void gfxPlatformFontList::AddFullnameLocked(gfxFontEntry* aFontEntry,
const nsCString& aFullname) {
mExtraNames->mFullnames.LookupOrInsertWith(aFullname, [&] {
LOG_FONTLIST(("(fontlist-fullname) name: %s, fullname: %s\n",
aFontEntry->Name().get(), aFullname.get()));
return RefPtr{aFontEntry};
});
}
void gfxPlatformFontList::AddPostscriptNameLocked(
gfxFontEntry* aFontEntry, const nsCString& aPostscriptName) {
mExtraNames->mPostscriptNames.LookupOrInsertWith(aPostscriptName, [&] {
LOG_FONTLIST(("(fontlist-postscript) name: %s, psname: %s\n",
aFontEntry->Name().get(), aPostscriptName.get()));
return RefPtr{aFontEntry};
});
}
bool gfxPlatformFontList::GetStandardFamilyName(const nsCString& aFontName,
nsACString& aFamilyName) {
AutoLock lock(mLock);
FontFamily family = FindFamily(nullptr, aFontName);
if (family.IsNull()) {
return false;
}
return GetLocalizedFamilyName(family, aFamilyName);
}
bool gfxPlatformFontList::GetLocalizedFamilyName(const FontFamily& aFamily,
nsACString& aFamilyName) {
if (aFamily.mShared) {
aFamilyName = SharedFontList()->LocalizedFamilyName(aFamily.mShared);
return true;
}
if (aFamily.mUnshared) {
aFamily.mUnshared->LocalizedName(aFamilyName);
return true;
}
return false; // leaving the aFamilyName outparam untouched
}
FamilyAndGeneric gfxPlatformFontList::GetDefaultFontFamily(
const nsACString& aLangGroup, const nsACString& aGenericFamily) {
if (NS_WARN_IF(aLangGroup.IsEmpty()) ||
NS_WARN_IF(aGenericFamily.IsEmpty())) {
return FamilyAndGeneric();
}
AutoLock lock(mLock);
nsAutoCString value;
AutoTArray<nsCString, 4> names;
if (mFontPrefs->LookupNameList(PrefName(aGenericFamily, aLangGroup), value)) {
gfxFontUtils::ParseFontList(value, names);
}
for (const nsCString& name : names) {
FontFamily family = FindFamily(nullptr, name);
if (!family.IsNull()) {
return FamilyAndGeneric(family);
}
}
return FamilyAndGeneric();
}
ShmemCharMapHashEntry::ShmemCharMapHashEntry(const gfxSparseBitSet* aCharMap)
: mList(gfxPlatformFontList::PlatformFontList()->SharedFontList()),
mCharMap(),
mHash(aCharMap->GetChecksum()) {
size_t len = SharedBitSet::RequiredSize(*aCharMap);
mCharMap = mList->Alloc(len);
SharedBitSet::Create(mCharMap.ToPtr(mList, len), len, *aCharMap);
}
fontlist::Pointer gfxPlatformFontList::GetShmemCharMapLocked(
const gfxSparseBitSet* aCmap) {
auto* entry = mShmemCharMaps.GetEntry(aCmap);
if (!entry) {
entry = mShmemCharMaps.PutEntry(aCmap);
}
return entry->GetCharMap();
}
// Lookup aCmap in the shared cmap set, adding if not already present.
// This is the only way for a reference to a gfxCharacterMap to be acquired
// by another thread than its original creator.
already_AddRefed<gfxCharacterMap> gfxPlatformFontList::FindCharMap(
gfxCharacterMap* aCmap) {
// Lock to prevent potentially racing against MaybeRemoveCmap.
AutoLock lock(mLock);
// Find existing entry or insert a new one (which will add a reference).
aCmap->CalcHash();
aCmap->mShared = true; // Set the shared flag in preparation for adding
// to the global table.
RefPtr cmap = mSharedCmaps.PutEntry(aCmap)->GetKey();
// If we ended up finding a different, pre-existing entry, clear the
// shared flag on this one so that it'll get deleted on Release().
if (cmap.get() != aCmap) {
aCmap->mShared = false;
}
return cmap.forget();
}
// Potentially remove the charmap from the shared cmap set. This is called
// when a user of the charmap drops a reference and the refcount goes to 1;
// in that case, it is possible our shared set is the only remaining user
// of the object, and we should remove it.
// Note that aCharMap might have already been freed, so we must not try to
// dereference it until we have checked that it's still present in our table.
void gfxPlatformFontList::MaybeRemoveCmap(gfxCharacterMap* aCharMap) {
// Lock so that nobody else can get a reference via FindCharMap while we're
// checking here.
AutoLock lock(mLock);
// Skip lookups during teardown.
if (!mSharedCmaps.Count()) {
return;
}
// aCharMap needs to match the entry and be the same ptr and still have a
// refcount of exactly 1 (i.e. we hold the only reference) before removing.
// If we're racing another thread, it might already have been removed, in
// which case GetEntry will not find it and we won't try to dereference the
// already-freed pointer.
CharMapHashKey* found =
mSharedCmaps.GetEntry(const_cast<gfxCharacterMap*>(aCharMap));
if (found && found->GetKey() == aCharMap && aCharMap->RefCount() == 1) {
// Forget our reference to the object that's being deleted, without
// calling Release() on it.
Unused << found->mCharMap.forget();
// Do the deletion.
delete aCharMap;
// Log this as a "Release" to keep leak-checking correct.
NS_LOG_RELEASE(aCharMap, 0, "gfxCharacterMap");
mSharedCmaps.RemoveEntry(found);
}
}
static void GetSystemUIFontFamilies([[maybe_unused]] nsAtom* aLangGroup,
nsTArray<nsCString>& aFamilies) {
// TODO: On macOS, use CTCreateUIFontForLanguage or such thing (though the
// code below ends up using [NSFont systemFontOfSize: 0.0].
nsFont systemFont;
gfxFontStyle fontStyle;
nsAutoString systemFontName;
if (!LookAndFeel::GetFont(StyleSystemFont::Menu, systemFontName, fontStyle)) {
return;
}
systemFontName.Trim("\"'");
CopyUTF16toUTF8(systemFontName, *aFamilies.AppendElement());
}
void gfxPlatformFontList::ResolveGenericFontNames(
nsPresContext* aPresContext, StyleGenericFontFamily aGenericType,
eFontPrefLang aPrefLang, PrefFontList* aGenericFamilies) {
const char* langGroupStr = GetPrefLangName(aPrefLang);
const char* generic = GetGenericName(aGenericType);
if (!generic) {
return;
}
AutoTArray<nsCString, 4> genericFamilies;
// load family for "font.name.generic.lang"
PrefName prefName(generic, langGroupStr);
nsAutoCString value;
if (mFontPrefs->LookupName(prefName, value)) {
gfxFontUtils::ParseFontList(value, genericFamilies);
}
// load fonts for "font.name-list.generic.lang"
if (mFontPrefs->LookupNameList(prefName, value)) {
gfxFontUtils::ParseFontList(value, genericFamilies);
}
nsAtom* langGroup = GetLangGroupForPrefLang(aPrefLang);
MOZ_ASSERT(langGroup, "null lang group for pref lang");
if (aGenericType == StyleGenericFontFamily::SystemUi) {
GetSystemUIFontFamilies(langGroup, genericFamilies);
}
GetFontFamiliesFromGenericFamilies(
aPresContext, aGenericType, genericFamilies, langGroup, aGenericFamilies);
#if 0 // dump out generic mappings
printf("%s ===> ", NamePref(generic, langGroupStr).get());
for (uint32_t k = 0; k < aGenericFamilies->Length(); k++) {
if (k > 0) printf(", ");
printf("%s", (*aGenericFamilies)[k].mIsShared
? (*aGenericFamilies)[k].mShared->DisplayName().AsString(SharedFontList()).get()
: (*aGenericFamilies)[k].mUnshared->Name().get());
}
printf("\n");
#endif
}
void gfxPlatformFontList::ResolveEmojiFontNames(
nsPresContext* aPresContext, PrefFontList* aGenericFamilies) {
// emoji preference has no lang name
AutoTArray<nsCString, 4> genericFamilies;
nsAutoCString value;
if (mFontPrefs->LookupNameList(PrefName("emoji", ""), value)) {
gfxFontUtils::ParseFontList(value, genericFamilies);
}
GetFontFamiliesFromGenericFamilies(
aPresContext, StyleGenericFontFamily::MozEmoji, genericFamilies, nullptr,
aGenericFamilies);
}
void gfxPlatformFontList::GetFontFamiliesFromGenericFamilies(
nsPresContext* aPresContext, StyleGenericFontFamily aGenericType,
nsTArray<nsCString>& aGenericNameFamilies, nsAtom* aLangGroup,
PrefFontList* aGenericFamilies) {
// lookup and add platform fonts uniquely
for (const nsCString& genericFamily : aGenericNameFamilies) {
AutoTArray<FamilyAndGeneric, 10> families;
FindAndAddFamiliesLocked(aPresContext, aGenericType, genericFamily,
&families, FindFamiliesFlags(0), nullptr,
aLangGroup);
for (const FamilyAndGeneric& f : families) {
if (!aGenericFamilies->Contains(f.mFamily)) {
aGenericFamilies->AppendElement(f.mFamily);
}
}
}
}
gfxPlatformFontList::PrefFontList*
gfxPlatformFontList::GetPrefFontsLangGroupLocked(
nsPresContext* aPresContext, StyleGenericFontFamily aGenericType,
eFontPrefLang aPrefLang) {
if (aGenericType == StyleGenericFontFamily::MozEmoji ||
aPrefLang == eFontPrefLang_Emoji) {
// Emoji font has no lang
PrefFontList* prefFonts = mEmojiPrefFont.get();
if (MOZ_UNLIKELY(!prefFonts)) {
prefFonts = new PrefFontList;
ResolveEmojiFontNames(aPresContext, prefFonts);
mEmojiPrefFont.reset(prefFonts);
}
return prefFonts;
}
auto index = static_cast<size_t>(aGenericType);
PrefFontList* prefFonts = mLangGroupPrefFonts[aPrefLang][index].get();
if (MOZ_UNLIKELY(!prefFonts)) {
prefFonts = new PrefFontList;
ResolveGenericFontNames(aPresContext, aGenericType, aPrefLang, prefFonts);
mLangGroupPrefFonts[aPrefLang][index].reset(prefFonts);
}
return prefFonts;
}
void gfxPlatformFontList::AddGenericFonts(
nsPresContext* aPresContext, StyleGenericFontFamily aGenericType,
nsAtom* aLanguage, nsTArray<FamilyAndGeneric>& aFamilyList) {
AutoLock lock(mLock);
// map lang ==> langGroup
nsAtom* langGroup = GetLangGroup(aLanguage);
// langGroup ==> prefLang
eFontPrefLang prefLang = GetFontPrefLangFor(langGroup);
// lookup pref fonts
PrefFontList* prefFonts =
GetPrefFontsLangGroupLocked(aPresContext, aGenericType, prefLang);
if (!prefFonts->IsEmpty()) {
aFamilyList.SetCapacity(aFamilyList.Length() + prefFonts->Length());
for (auto& f : *prefFonts) {
aFamilyList.AppendElement(FamilyAndGeneric(f, aGenericType));
}
}
}
static nsAtom* PrefLangToLangGroups(uint32_t aIndex) {
// static array here avoids static constructor
static nsAtom* gPrefLangToLangGroups[] = {
#define FONT_PREF_LANG(enum_id_, str_, atom_id_) nsGkAtoms::atom_id_
#include "gfxFontPrefLangList.h"
#undef FONT_PREF_LANG
};
return aIndex < ArrayLength(gPrefLangToLangGroups)
? gPrefLangToLangGroups[aIndex]
: nsGkAtoms::Unicode;
}
eFontPrefLang gfxPlatformFontList::GetFontPrefLangFor(const char* aLang) {
if (!aLang || !aLang[0]) {
return eFontPrefLang_Others;
}
for (uint32_t i = 0; i < ArrayLength(gPrefLangNames); ++i) {
if (!nsCRT::strcasecmp(gPrefLangNames[i], aLang)) {
return eFontPrefLang(i);
}
}
return eFontPrefLang_Others;
}
eFontPrefLang gfxPlatformFontList::GetFontPrefLangFor(nsAtom* aLang) {
if (!aLang) return eFontPrefLang_Others;
nsAutoCString lang;
aLang->ToUTF8String(lang);
return GetFontPrefLangFor(lang.get());
}
nsAtom* gfxPlatformFontList::GetLangGroupForPrefLang(eFontPrefLang aLang) {
// the special CJK set pref lang should be resolved into separate
// calls to individual CJK pref langs before getting here
NS_ASSERTION(aLang != eFontPrefLang_CJKSet, "unresolved CJK set pref lang");
return PrefLangToLangGroups(uint32_t(aLang));
}
const char* gfxPlatformFontList::GetPrefLangName(eFontPrefLang aLang) {
if (uint32_t(aLang) < ArrayLength(gPrefLangNames)) {
return gPrefLangNames[uint32_t(aLang)];
}
return nullptr;
}
eFontPrefLang gfxPlatformFontList::GetFontPrefLangFor(uint32_t aCh) {
switch (ublock_getCode(aCh)) {
case UBLOCK_BASIC_LATIN:
case UBLOCK_LATIN_1_SUPPLEMENT:
case UBLOCK_LATIN_EXTENDED_A:
case UBLOCK_LATIN_EXTENDED_B:
case UBLOCK_IPA_EXTENSIONS:
case UBLOCK_SPACING_MODIFIER_LETTERS:
case UBLOCK_LATIN_EXTENDED_ADDITIONAL:
case UBLOCK_LATIN_EXTENDED_C:
case UBLOCK_LATIN_EXTENDED_D:
case UBLOCK_LATIN_EXTENDED_E:
case UBLOCK_PHONETIC_EXTENSIONS:
return eFontPrefLang_Western;
case UBLOCK_GREEK:
case UBLOCK_GREEK_EXTENDED:
return eFontPrefLang_Greek;
case UBLOCK_CYRILLIC:
case UBLOCK_CYRILLIC_SUPPLEMENT:
case UBLOCK_CYRILLIC_EXTENDED_A:
case UBLOCK_CYRILLIC_EXTENDED_B:
case UBLOCK_CYRILLIC_EXTENDED_C:
return eFontPrefLang_Cyrillic;
case UBLOCK_ARMENIAN:
return eFontPrefLang_Armenian;
case UBLOCK_HEBREW:
return eFontPrefLang_Hebrew;
case UBLOCK_ARABIC:
case UBLOCK_ARABIC_PRESENTATION_FORMS_A:
case UBLOCK_ARABIC_PRESENTATION_FORMS_B:
case UBLOCK_ARABIC_SUPPLEMENT:
case UBLOCK_ARABIC_EXTENDED_A:
case UBLOCK_ARABIC_MATHEMATICAL_ALPHABETIC_SYMBOLS:
return eFontPrefLang_Arabic;
case UBLOCK_DEVANAGARI:
case UBLOCK_DEVANAGARI_EXTENDED:
return eFontPrefLang_Devanagari;
case UBLOCK_BENGALI:
return eFontPrefLang_Bengali;
case UBLOCK_GURMUKHI:
return eFontPrefLang_Gurmukhi;
case UBLOCK_GUJARATI:
return eFontPrefLang_Gujarati;
case UBLOCK_ORIYA:
return eFontPrefLang_Oriya;
case UBLOCK_TAMIL:
return eFontPrefLang_Tamil;
case UBLOCK_TELUGU:
return eFontPrefLang_Telugu;
case UBLOCK_KANNADA:
return eFontPrefLang_Kannada;
case UBLOCK_MALAYALAM:
return eFontPrefLang_Malayalam;
case UBLOCK_SINHALA:
case UBLOCK_SINHALA_ARCHAIC_NUMBERS:
return eFontPrefLang_Sinhala;
case UBLOCK_THAI:
return eFontPrefLang_Thai;
case UBLOCK_TIBETAN:
return eFontPrefLang_Tibetan;
case UBLOCK_GEORGIAN:
case UBLOCK_GEORGIAN_SUPPLEMENT:
case UBLOCK_GEORGIAN_EXTENDED:
return eFontPrefLang_Georgian;
case UBLOCK_HANGUL_JAMO:
case UBLOCK_HANGUL_COMPATIBILITY_JAMO:
case UBLOCK_HANGUL_SYLLABLES:
case UBLOCK_HANGUL_JAMO_EXTENDED_A:
case UBLOCK_HANGUL_JAMO_EXTENDED_B:
return eFontPrefLang_Korean;
case UBLOCK_ETHIOPIC:
case UBLOCK_ETHIOPIC_EXTENDED:
case UBLOCK_ETHIOPIC_SUPPLEMENT:
case UBLOCK_ETHIOPIC_EXTENDED_A:
return eFontPrefLang_Ethiopic;
case UBLOCK_UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS:
case UBLOCK_UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS_EXTENDED:
return eFontPrefLang_Canadian;
case UBLOCK_KHMER:
case UBLOCK_KHMER_SYMBOLS:
return eFontPrefLang_Khmer;
case UBLOCK_CJK_RADICALS_SUPPLEMENT:
case UBLOCK_KANGXI_RADICALS:
case UBLOCK_IDEOGRAPHIC_DESCRIPTION_CHARACTERS:
case UBLOCK_CJK_SYMBOLS_AND_PUNCTUATION:
case UBLOCK_HIRAGANA:
case UBLOCK_KATAKANA:
case UBLOCK_BOPOMOFO:
case UBLOCK_KANBUN:
case UBLOCK_BOPOMOFO_EXTENDED:
case UBLOCK_ENCLOSED_CJK_LETTERS_AND_MONTHS:
case UBLOCK_CJK_COMPATIBILITY:
case UBLOCK_CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A:
case UBLOCK_CJK_UNIFIED_IDEOGRAPHS:
case UBLOCK_CJK_COMPATIBILITY_IDEOGRAPHS:
case UBLOCK_CJK_COMPATIBILITY_FORMS:
case UBLOCK_SMALL_FORM_VARIANTS:
case UBLOCK_HALFWIDTH_AND_FULLWIDTH_FORMS:
case UBLOCK_CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B:
case UBLOCK_CJK_COMPATIBILITY_IDEOGRAPHS_SUPPLEMENT:
case UBLOCK_KATAKANA_PHONETIC_EXTENSIONS:
case UBLOCK_CJK_STROKES:
case UBLOCK_VERTICAL_FORMS:
case UBLOCK_CJK_UNIFIED_IDEOGRAPHS_EXTENSION_C:
case UBLOCK_KANA_SUPPLEMENT:
case UBLOCK_CJK_UNIFIED_IDEOGRAPHS_EXTENSION_D:
case UBLOCK_CJK_UNIFIED_IDEOGRAPHS_EXTENSION_E:
case UBLOCK_IDEOGRAPHIC_SYMBOLS_AND_PUNCTUATION:
case UBLOCK_CJK_UNIFIED_IDEOGRAPHS_EXTENSION_F:
case UBLOCK_KANA_EXTENDED_A:
return eFontPrefLang_CJKSet;
case UBLOCK_MATHEMATICAL_OPERATORS:
case UBLOCK_MATHEMATICAL_ALPHANUMERIC_SYMBOLS:
case UBLOCK_MISCELLANEOUS_MATHEMATICAL_SYMBOLS_A:
case UBLOCK_MISCELLANEOUS_MATHEMATICAL_SYMBOLS_B:
case UBLOCK_SUPPLEMENTAL_MATHEMATICAL_OPERATORS:
return eFontPrefLang_Mathematics;
default:
return eFontPrefLang_Others;
}
}
bool gfxPlatformFontList::IsLangCJK(eFontPrefLang aLang) {
switch (aLang) {
case eFontPrefLang_Japanese:
case eFontPrefLang_ChineseTW:
case eFontPrefLang_ChineseCN:
case eFontPrefLang_ChineseHK:
case eFontPrefLang_Korean:
case eFontPrefLang_CJKSet:
return true;
default:
return false;
}
}
void gfxPlatformFontList::GetLangPrefs(eFontPrefLang aPrefLangs[],
uint32_t& aLen, eFontPrefLang aCharLang,
eFontPrefLang aPageLang) {
AutoLock lock(mLock);
if (IsLangCJK(aCharLang)) {
AppendCJKPrefLangs(aPrefLangs, aLen, aCharLang, aPageLang);
} else {
AppendPrefLang(aPrefLangs, aLen, aCharLang);
}
AppendPrefLang(aPrefLangs, aLen, eFontPrefLang_Others);
}
void gfxPlatformFontList::AppendCJKPrefLangs(eFontPrefLang aPrefLangs[],
uint32_t& aLen,
eFontPrefLang aCharLang,
eFontPrefLang aPageLang) {
// prefer the lang specified by the page *if* CJK
if (IsLangCJK(aPageLang)) {
AppendPrefLang(aPrefLangs, aLen, aPageLang);
}
// if not set up, set up the default CJK order, based on accept lang
// settings and locale
if (mCJKPrefLangs.Length() == 0) {
// temp array
eFontPrefLang tempPrefLangs[kMaxLenPrefLangList];
uint32_t tempLen = 0;
// Add the CJK pref fonts from accept languages, the order should be same
// order. We use gfxFontUtils::GetPrefsFontList to read the list even
// though it's not actually a list of fonts but of lang codes; the format
// is the same.
AutoTArray<nsCString, 5> list;
gfxFontUtils::GetPrefsFontList("intl.accept_languages", list, true);
for (const auto& lang : list) {
eFontPrefLang fpl = GetFontPrefLangFor(lang.get());
switch (fpl) {
case eFontPrefLang_Japanese:
case eFontPrefLang_Korean:
case eFontPrefLang_ChineseCN:
case eFontPrefLang_ChineseHK:
case eFontPrefLang_ChineseTW:
AppendPrefLang(tempPrefLangs, tempLen, fpl);
break;
default:
break;
}
}
// Try using app's locale
nsAutoCString localeStr;
LocaleService::GetInstance()->GetAppLocaleAsBCP47(localeStr);
{
Locale locale;
if (LocaleParser::TryParse(localeStr, locale).isOk() &&
locale.Canonicalize().isOk()) {
if (locale.Language().EqualTo("ja")) {
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_Japanese);
} else if (locale.Language().EqualTo("zh")) {
if (locale.Region().EqualTo("CN")) {
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_ChineseCN);
} else if (locale.Region().EqualTo("TW")) {
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_ChineseTW);
} else if (locale.Region().EqualTo("HK")) {
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_ChineseHK);
}
} else if (locale.Language().EqualTo("ko")) {
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_Korean);
}
}
}
// Then add the known CJK prefs in order of system preferred locales
AutoTArray<nsCString, 5> prefLocales;
prefLocales.AppendElement("ja"_ns);
prefLocales.AppendElement("zh-CN"_ns);
prefLocales.AppendElement("zh-TW"_ns);
prefLocales.AppendElement("zh-HK"_ns);
prefLocales.AppendElement("ko"_ns);
AutoTArray<nsCString, 16> sysLocales;
AutoTArray<nsCString, 16> negLocales;
if (NS_SUCCEEDED(
OSPreferences::GetInstance()->GetSystemLocales(sysLocales))) {
LocaleService::GetInstance()->NegotiateLanguages(
sysLocales, prefLocales, ""_ns,
LocaleService::kLangNegStrategyFiltering, negLocales);
for (const auto& localeStr : negLocales) {
Locale locale;
if (LocaleParser::TryParse(localeStr, locale).isOk() &&
locale.Canonicalize().isOk()) {
if (locale.Language().EqualTo("ja")) {
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_Japanese);
} else if (locale.Language().EqualTo("zh")) {
if (locale.Region().EqualTo("CN")) {
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_ChineseCN);
} else if (locale.Region().EqualTo("TW")) {
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_ChineseTW);
} else if (locale.Region().EqualTo("HK")) {
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_ChineseHK);
}
} else if (locale.Language().EqualTo("ko")) {
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_Korean);
}
}
}
}
// Last resort... set up CJK font prefs in the order listed by the user-
// configurable ordering pref.
gfxFontUtils::GetPrefsFontList(kCJKFallbackOrderPref, list);
for (const auto& item : list) {
eFontPrefLang fpl = GetFontPrefLangFor(item.get());
switch (fpl) {
case eFontPrefLang_Japanese:
case eFontPrefLang_Korean:
case eFontPrefLang_ChineseCN:
case eFontPrefLang_ChineseHK:
case eFontPrefLang_ChineseTW:
AppendPrefLang(tempPrefLangs, tempLen, fpl);
break;
default:
break;
}
}
// Truly-last resort... try Chinese font prefs before Japanese because
// they tend to have more complete character coverage, and therefore less
// risk of "ransom-note" effects.
// (If the kCJKFallbackOrderPref was fully populated, as it is by default,
// this will do nothing as all these values are already present.)
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_ChineseCN);
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_ChineseHK);
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_ChineseTW);
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_Japanese);
AppendPrefLang(tempPrefLangs, tempLen, eFontPrefLang_Korean);
// copy into the cached array
for (const auto lang : Span<eFontPrefLang>(tempPrefLangs, tempLen)) {
mCJKPrefLangs.AppendElement(lang);
}
}
// append in cached CJK langs
for (const auto lang : mCJKPrefLangs) {
AppendPrefLang(aPrefLangs, aLen, eFontPrefLang(lang));
}
}
void gfxPlatformFontList::AppendPrefLang(eFontPrefLang aPrefLangs[],
uint32_t& aLen,
eFontPrefLang aAddLang) {
if (aLen >= kMaxLenPrefLangList) {
return;
}
// If the lang is already present, just ignore the addition.
for (const auto lang : Span<eFontPrefLang>(aPrefLangs, aLen)) {
if (lang == aAddLang) {
return;
}
}
aPrefLangs[aLen++] = aAddLang;
}
StyleGenericFontFamily gfxPlatformFontList::GetDefaultGeneric(
eFontPrefLang aLang) {
if (aLang == eFontPrefLang_Emoji) {
return StyleGenericFontFamily::MozEmoji;
}
AutoLock lock(mLock);
if (uint32_t(aLang) < ArrayLength(gPrefLangNames)) {
return mDefaultGenericsLangGroup[uint32_t(aLang)];
}
return StyleGenericFontFamily::Serif;
}
FontFamily gfxPlatformFontList::GetDefaultFont(nsPresContext* aPresContext,
const gfxFontStyle* aStyle) {
AutoLock lock(mLock);
return GetDefaultFontLocked(aPresContext, aStyle);
}
FontFamily gfxPlatformFontList::GetDefaultFontLocked(
nsPresContext* aPresContext, const gfxFontStyle* aStyle) {
FontFamily family = GetDefaultFontForPlatform(aPresContext, aStyle);
if (!family.IsNull()) {
return family;
}
// Something has gone wrong and we were unable to retrieve a default font
// from the platform. (Likely the whitelist has blocked all potential
// default fonts.) As a last resort, we return the first font in our list.
if (SharedFontList()) {
MOZ_RELEASE_ASSERT(SharedFontList()->NumFamilies() > 0);
return FontFamily(SharedFontList()->Families());
}
MOZ_RELEASE_ASSERT(mFontFamilies.Count() > 0);
return FontFamily(mFontFamilies.ConstIter().Data());
}
void gfxPlatformFontList::GetFontFamilyNames(
nsTArray<nsCString>& aFontFamilyNames) {
if (SharedFontList()) {
fontlist::FontList* list = SharedFontList();
const fontlist::Family* families = list->Families();
if (families) {
for (uint32_t i = 0, n = list->NumFamilies(); i < n; i++) {
const fontlist::Family& family = families[i];
if (!family.IsHidden()) {
aFontFamilyNames.AppendElement(family.DisplayName().AsString(list));
}
}
}
} else {
for (const RefPtr<gfxFontFamily>& family : mFontFamilies.Values()) {
if (!family->IsHidden()) {
aFontFamilyNames.AppendElement(family->Name());
}
}
}
}
nsAtom* gfxPlatformFontList::GetLangGroup(nsAtom* aLanguage) {
// map lang ==> langGroup
nsAtom* langGroup = nullptr;
if (aLanguage) {
langGroup = mLangService->GetLanguageGroup(aLanguage);
}
if (!langGroup) {
langGroup = nsGkAtoms::Unicode;
}
return langGroup;
}
/* static */ const char* gfxPlatformFontList::GetGenericName(
StyleGenericFontFamily aGenericType) {
// type should be standard generic type at this point
// map generic type to string
switch (aGenericType) {
case StyleGenericFontFamily::Serif:
return "serif";
case StyleGenericFontFamily::SansSerif:
return "sans-serif";
case StyleGenericFontFamily::Monospace:
return "monospace";
case StyleGenericFontFamily::Cursive:
return "cursive";
case StyleGenericFontFamily::Fantasy:
return "fantasy";
case StyleGenericFontFamily::SystemUi:
return "system-ui";
case StyleGenericFontFamily::MozEmoji:
return "-moz-emoji";
case StyleGenericFontFamily::None:
break;
}
MOZ_ASSERT_UNREACHABLE("Unknown generic");
return nullptr;
}
void gfxPlatformFontList::InitLoader() {
GetFontFamilyNames(mFontInfo->mFontFamiliesToLoad);
mStartIndex = 0;
mNumFamilies = mFontInfo->mFontFamiliesToLoad.Length();
memset(&(mFontInfo->mLoadStats), 0, sizeof(mFontInfo->mLoadStats));
}
#define FONT_LOADER_MAX_TIMESLICE \
20 // max time for one pass through RunLoader = 20ms
bool gfxPlatformFontList::LoadFontInfo() {
AutoLock lock(mLock);
TimeStamp start = TimeStamp::Now();
uint32_t i, endIndex = mNumFamilies;
fontlist::FontList* list = SharedFontList();
bool loadCmaps =
!list && (!UsesSystemFallback() ||
gfxPlatform::GetPlatform()->UseCmapsDuringSystemFallback());
// for each font family, load in various font info
for (i = mStartIndex; i < endIndex; i++) {
nsAutoCString key;
GenerateFontListKey(mFontInfo->mFontFamiliesToLoad[i], key);
if (list) {
fontlist::Family* family = list->FindFamily(key);
if (!family) {
continue;
}
ReadFaceNamesForFamily(family, NeedFullnamePostscriptNames());
} else {
// lookup in canonical (i.e. English) family name list
gfxFontFamily* familyEntry = mFontFamilies.GetWeak(key);
if (!familyEntry) {
continue;
}
// read in face names
familyEntry->ReadFaceNames(this, NeedFullnamePostscriptNames(),
mFontInfo);
// load the cmaps if needed
if (loadCmaps) {
familyEntry->ReadAllCMAPs(mFontInfo);
}
}
// Limit the time spent reading fonts in one pass, unless the font-loader
// delay was set to zero, in which case we run to completion even if it
// causes some jank.
if (StaticPrefs::gfx_font_loader_delay_AtStartup() > 0) {
TimeDuration elapsed = TimeStamp::Now() - start;
if (elapsed.ToMilliseconds() > FONT_LOADER_MAX_TIMESLICE &&
i + 1 != endIndex) {
endIndex = i + 1;
break;
}
}
}
mStartIndex = endIndex;
bool done = mStartIndex >= mNumFamilies;
if (LOG_FONTINIT_ENABLED()) {
TimeDuration elapsed = TimeStamp::Now() - start;
LOG_FONTINIT(("(fontinit) fontloader load pass %8.2f ms done %s\n",
elapsed.ToMilliseconds(), (done ? "true" : "false")));
}
if (done) {
mOtherFamilyNamesInitialized = true;
CancelInitOtherFamilyNamesTask();
mFaceNameListsInitialized = true;
}
return done;
}
void gfxPlatformFontList::CleanupLoader() {
AutoLock lock(mLock);
mFontFamiliesToLoad.Clear();
mNumFamilies = 0;
bool rebuilt = false, forceReflow = false;
// if had missed face names that are now available, force reflow all
if (mFaceNamesMissed) {
rebuilt = std::any_of(mFaceNamesMissed->cbegin(), mFaceNamesMissed->cend(),
[&](const auto& key) {
mLock.AssertCurrentThreadIn();
return FindFaceName(key);
});
if (rebuilt) {
RebuildLocalFonts();
}
mFaceNamesMissed = nullptr;
}
if (mOtherNamesMissed) {
forceReflow = std::any_of(
mOtherNamesMissed->cbegin(), mOtherNamesMissed->cend(),
[&](const auto& key) {
mLock.AssertCurrentThreadIn();
return FindUnsharedFamily(
nullptr, key,
(FindFamiliesFlags::eForceOtherFamilyNamesLoading |
FindFamiliesFlags::eNoAddToNamesMissedWhenSearching));
});
if (forceReflow) {
ForceGlobalReflowLocked(gfxPlatform::NeedsReframe::No);
}
mOtherNamesMissed = nullptr;
}
if (LOG_FONTINIT_ENABLED() && mFontInfo) {
LOG_FONTINIT(
("(fontinit) fontloader load thread took %8.2f ms "
"%d families %d fonts %d cmaps "
"%d facenames %d othernames %s %s",
mLoadTime.ToMilliseconds(), mFontInfo->mLoadStats.families,
mFontInfo->mLoadStats.fonts, mFontInfo->mLoadStats.cmaps,
mFontInfo->mLoadStats.facenames, mFontInfo->mLoadStats.othernames,
(rebuilt ? "(userfont sets rebuilt)" : ""),
(forceReflow ? "(global reflow)" : "")));
}
gfxFontInfoLoader::CleanupLoader();
}
void gfxPlatformFontList::ForceGlobalReflowLocked(
gfxPlatform::NeedsReframe aNeedsReframe,
gfxPlatform::BroadcastToChildren aBroadcastToChildren) {
if (!NS_IsMainThread()) {
NS_DispatchToMainThread(NS_NewRunnableFunction(
"gfxPlatformFontList::ForceGlobalReflowLocked",
[aNeedsReframe, aBroadcastToChildren] {
gfxPlatform::ForceGlobalReflow(aNeedsReframe, aBroadcastToChildren);
}));
return;
}
AutoUnlock unlock(mLock);
gfxPlatform::ForceGlobalReflow(aNeedsReframe, aBroadcastToChildren);
}
void gfxPlatformFontList::GetPrefsAndStartLoader() {
// If we're already in shutdown, there's no point in starting this, and it
// could trigger an assertion if we try to use the Thread Manager too late.
if (AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed)) {
return;
}
uint32_t delay = std::max(1u, StaticPrefs::gfx_font_loader_delay_AtStartup());
if (NS_IsMainThread()) {
StartLoader(delay);
} else {
NS_DispatchToMainThread(NS_NewRunnableFunction(
"StartLoader callback", [delay, fontList = this] {
fontList->Lock();
fontList->StartLoader(delay);
fontList->Unlock();
}));
}
}
void gfxPlatformFontList::RebuildLocalFonts(bool aForgetLocalFaces) {
for (auto* fontset : mUserFontSetList) {
if (aForgetLocalFaces) {
fontset->ForgetLocalFaces();
}
fontset->RebuildLocalRules();
}
}
void gfxPlatformFontList::ClearLangGroupPrefFontsLocked() {
for (uint32_t i = eFontPrefLang_First;
i < eFontPrefLang_First + eFontPrefLang_Count; i++) {
auto& prefFontsLangGroup = mLangGroupPrefFonts[i];
for (auto& pref : prefFontsLangGroup) {
pref = nullptr;
}
}
mCJKPrefLangs.Clear();
mEmojiPrefFont = nullptr;
// Create a new FontPrefs and replace the existing one.
mFontPrefs = MakeUnique<FontPrefs>();
}
// Support for memory reporting
// this is also used by subclasses that hold additional font tables
/*static*/
size_t gfxPlatformFontList::SizeOfFontFamilyTableExcludingThis(
const FontFamilyTable& aTable, MallocSizeOf aMallocSizeOf) {
return std::accumulate(
aTable.Keys().cbegin(), aTable.Keys().cend(),
aTable.ShallowSizeOfExcludingThis(aMallocSizeOf),
[&](size_t oldValue, const nsACString& key) {
// We don't count the size of the family here, because this is an
// *extra* reference to a family that will have already been counted in
// the main list.
return oldValue + key.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
});
}
/*static*/
size_t gfxPlatformFontList::SizeOfFontEntryTableExcludingThis(
const FontEntryTable& aTable, MallocSizeOf aMallocSizeOf) {
return std::accumulate(
aTable.Keys().cbegin(), aTable.Keys().cend(),
aTable.ShallowSizeOfExcludingThis(aMallocSizeOf),
[&](size_t oldValue, const nsACString& key) {
// The font itself is counted by its owning family; here we only care
// about the names stored in the hashtable keys.
return oldValue + key.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
});
}
void gfxPlatformFontList::AddSizeOfExcludingThis(MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const {
AutoLock lock(mLock);
aSizes->mFontListSize +=
mFontFamilies.ShallowSizeOfExcludingThis(aMallocSizeOf);
for (const auto& entry : mFontFamilies) {
aSizes->mFontListSize +=
entry.GetKey().SizeOfExcludingThisIfUnshared(aMallocSizeOf);
entry.GetData()->AddSizeOfIncludingThis(aMallocSizeOf, aSizes);
}
aSizes->mFontListSize +=
SizeOfFontFamilyTableExcludingThis(mOtherFamilyNames, aMallocSizeOf);
if (mExtraNames) {
aSizes->mFontListSize += SizeOfFontEntryTableExcludingThis(
mExtraNames->mFullnames, aMallocSizeOf);
aSizes->mFontListSize += SizeOfFontEntryTableExcludingThis(
mExtraNames->mPostscriptNames, aMallocSizeOf);
}
for (uint32_t i = eFontPrefLang_First;
i < eFontPrefLang_First + eFontPrefLang_Count; i++) {
auto& prefFontsLangGroup = mLangGroupPrefFonts[i];
for (const UniquePtr<PrefFontList>& pf : prefFontsLangGroup) {
if (pf) {
aSizes->mFontListSize += pf->ShallowSizeOfExcludingThis(aMallocSizeOf);
}
}
}
for (const auto& bitset : mCodepointsWithNoFonts) {
aSizes->mFontListSize += bitset.SizeOfExcludingThis(aMallocSizeOf);
}
aSizes->mFontListSize +=
mFontFamiliesToLoad.ShallowSizeOfExcludingThis(aMallocSizeOf);
aSizes->mFontListSize +=
mBadUnderlineFamilyNames.ShallowSizeOfExcludingThis(aMallocSizeOf);
for (const auto& i : mBadUnderlineFamilyNames) {
aSizes->mFontListSize += i.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
}
aSizes->mFontListSize +=
mSharedCmaps.ShallowSizeOfExcludingThis(aMallocSizeOf);
for (const auto& entry : mSharedCmaps) {
aSizes->mCharMapsSize += entry.GetKey()->SizeOfIncludingThis(aMallocSizeOf);
}
aSizes->mFontListSize +=
mFontEntries.ShallowSizeOfExcludingThis(aMallocSizeOf);
for (const auto& entry : mFontEntries.Values()) {
if (entry) {
entry->AddSizeOfIncludingThis(aMallocSizeOf, aSizes);
}
}
if (SharedFontList()) {
aSizes->mFontListSize +=
SharedFontList()->SizeOfIncludingThis(aMallocSizeOf);
if (XRE_IsParentProcess()) {
aSizes->mSharedSize += SharedFontList()->AllocatedShmemSize();
}
}
}
void gfxPlatformFontList::AddSizeOfIncludingThis(MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const {
aSizes->mFontListSize += aMallocSizeOf(this);
AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
}
void gfxPlatformFontList::InitOtherFamilyNamesInternal(
bool aDeferOtherFamilyNamesLoading) {
if (mOtherFamilyNamesInitialized) {
return;
}
AutoLock lock(mLock);
if (aDeferOtherFamilyNamesLoading) {
TimeStamp start = TimeStamp::Now();
bool timedOut = false;
auto list = SharedFontList();
if (list) {
// If the gfxFontInfoLoader task is not yet running, kick it off now so
// that it will load remaining names etc as soon as idle time permits.
if (mState == stateInitial || mState == stateTimerOnDelay) {
StartLoader(0);
timedOut = true;
}
} else {
for (const RefPtr<gfxFontFamily>& family : mFontFamilies.Values()) {
family->ReadOtherFamilyNames(this);
TimeDuration elapsed = TimeStamp::Now() - start;
if (elapsed.ToMilliseconds() > OTHERNAMES_TIMEOUT) {
timedOut = true;
break;
}
}
}
if (!timedOut) {
mOtherFamilyNamesInitialized = true;
CancelInitOtherFamilyNamesTask();
}
TimeStamp end = TimeStamp::Now();
Telemetry::AccumulateTimeDelta(Telemetry::FONTLIST_INITOTHERFAMILYNAMES,
start, end);
if (LOG_FONTINIT_ENABLED()) {
TimeDuration elapsed = end - start;
LOG_FONTINIT(("(fontinit) InitOtherFamilyNames took %8.2f ms %s",
elapsed.ToMilliseconds(), (timedOut ? "timeout" : "")));
}
} else {
TimeStamp start = TimeStamp::Now();
auto list = SharedFontList();
if (list) {
for (auto& f : mozilla::Range<fontlist::Family>(list->Families(),
list->NumFamilies())) {
ReadFaceNamesForFamily(&f, false);
}
} else {
for (const RefPtr<gfxFontFamily>& family : mFontFamilies.Values()) {
family->ReadOtherFamilyNames(this);
}
}
mOtherFamilyNamesInitialized = true;
CancelInitOtherFamilyNamesTask();
TimeStamp end = TimeStamp::Now();
Telemetry::AccumulateTimeDelta(
Telemetry::FONTLIST_INITOTHERFAMILYNAMES_NO_DEFERRING, start, end);
if (LOG_FONTINIT_ENABLED()) {
TimeDuration elapsed = end - start;
LOG_FONTINIT(
("(fontinit) InitOtherFamilyNames without deferring took %8.2f ms",
elapsed.ToMilliseconds()));
}
}
}
void gfxPlatformFontList::CancelInitOtherFamilyNamesTask() {
if (mPendingOtherFamilyNameTask) {
mPendingOtherFamilyNameTask->Cancel();
mPendingOtherFamilyNameTask = nullptr;
}
auto list = SharedFontList();
if (list && XRE_IsParentProcess()) {
bool forceReflow = false;
if (!mAliasTable.IsEmpty()) {
list->SetAliases(mAliasTable);
mAliasTable.Clear();
forceReflow = true;
}
if (mLocalNameTable.Count()) {
list->SetLocalNames(mLocalNameTable);
mLocalNameTable.Clear();
forceReflow = true;
}
if (forceReflow) {
dom::ContentParent::BroadcastFontListChanged();
}
}
}
void gfxPlatformFontList::ShareFontListShmBlockToProcess(
uint32_t aGeneration, uint32_t aIndex, base::ProcessId aPid,
base::SharedMemoryHandle* aOut) {
auto list = SharedFontList();
if (!list) {
return;
}
if (!aGeneration || list->GetGeneration() == aGeneration) {
list->ShareShmBlockToProcess(aIndex, aPid, aOut);
} else {
*aOut = base::SharedMemory::NULLHandle();
}
}
void gfxPlatformFontList::ShareFontListToProcess(
nsTArray<base::SharedMemoryHandle>* aBlocks, base::ProcessId aPid) {
auto list = SharedFontList();
if (list) {
list->ShareBlocksToProcess(aBlocks, aPid);
}
}
base::SharedMemoryHandle gfxPlatformFontList::ShareShmBlockToProcess(
uint32_t aIndex, base::ProcessId aPid) {
MOZ_RELEASE_ASSERT(SharedFontList());
return SharedFontList()->ShareBlockToProcess(aIndex, aPid);
}
void gfxPlatformFontList::ShmBlockAdded(uint32_t aGeneration, uint32_t aIndex,
base::SharedMemoryHandle aHandle) {
if (SharedFontList()) {
AutoLock lock(mLock);
SharedFontList()->ShmBlockAdded(aGeneration, aIndex, std::move(aHandle));
}
}
void gfxPlatformFontList::InitializeFamily(uint32_t aGeneration,
uint32_t aFamilyIndex,
bool aLoadCmaps) {
auto list = SharedFontList();
MOZ_ASSERT(list);
if (!list) {
return;
}
if (list->GetGeneration() != aGeneration) {
return;
}
if (AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed)) {
return;
}
if (aFamilyIndex >= list->NumFamilies()) {
return;
}
fontlist::Family* family = list->Families() + aFamilyIndex;
if (!family->IsInitialized() || aLoadCmaps) {
Unused << InitializeFamily(family, aLoadCmaps);
}
}
void gfxPlatformFontList::SetCharacterMap(uint32_t aGeneration,
const fontlist::Pointer& aFacePtr,
const gfxSparseBitSet& aMap) {
MOZ_ASSERT(XRE_IsParentProcess());
auto list = SharedFontList();
MOZ_ASSERT(list);
if (!list) {
return;
}
if (list->GetGeneration() != aGeneration) {
return;
}
if (AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed)) {
return;
}
auto* face = aFacePtr.ToPtr<fontlist::Face>(list);
if (face) {
face->mCharacterMap = GetShmemCharMap(&aMap);
}
}
void gfxPlatformFontList::SetupFamilyCharMap(
uint32_t aGeneration, const fontlist::Pointer& aFamilyPtr) {
MOZ_ASSERT(XRE_IsParentProcess());
auto list = SharedFontList();
MOZ_ASSERT(list);
if (!list) {
return;
}
if (list->GetGeneration() != aGeneration) {
return;
}
if (AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed)) {
return;
}
// aFamilyPtr was passed from a content process which may not be trusted,
// so we cannot assume it is valid or safe to use. If the Pointer value is
// bad, we must not crash or do anything bad, just bail out.
// (In general, if the child process was trying to use an invalid pointer it
// should have hit the MOZ_DIAGNOSTIC_ASSERT in FontList::ToSharedPointer
// rather than passing a null or bad pointer to the parent.)
auto* family = aFamilyPtr.ToPtr<fontlist::Family>(list);
if (!family) {
// Unable to resolve to a native pointer (or it was null).
NS_WARNING("unexpected null Family pointer");
return;
}
// Validate the pointer before trying to use it: check that it points to a
// correctly-aligned offset within the Families() or AliasFamilies() array.
// We just assert (in debug builds only) on failure, and return safely.
// A misaligned pointer here would indicate a buggy (or compromised) child
// process, but crashing the parent would be unnecessary and does not yield
// any useful insight.
if (family >= list->Families() &&
family < list->Families() + list->NumFamilies()) {
size_t offset = (char*)family - (char*)list->Families();
if (offset % sizeof(fontlist::Family) != 0) {
MOZ_ASSERT(false, "misaligned Family pointer");
return;
}
} else if (family >= list->AliasFamilies() &&
family < list->AliasFamilies() + list->NumAliases()) {
size_t offset = (char*)family - (char*)list->AliasFamilies();
if (offset % sizeof(fontlist::Family) != 0) {
MOZ_ASSERT(false, "misaligned Family pointer");
return;
}
} else {
MOZ_ASSERT(false, "not a valid Family or AliasFamily pointer");
return;
}
family->SetupFamilyCharMap(list);
}
bool gfxPlatformFontList::InitOtherFamilyNames(uint32_t aGeneration,
bool aDefer) {
auto list = SharedFontList();
MOZ_ASSERT(list);
if (!list) {
return false;
}
if (list->GetGeneration() != aGeneration) {
return false;
}
if (AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed)) {
return false;
}
return InitOtherFamilyNames(aDefer);
}
uint32_t gfxPlatformFontList::GetGeneration() const {
return SharedFontList() ? SharedFontList()->GetGeneration() : 0;
}
gfxPlatformFontList::FontPrefs::FontPrefs() {
// This must be created on the main thread, so that we can safely use the
// Preferences service. Once created, it can be read from any thread.
MOZ_ASSERT(NS_IsMainThread());
Init();
}
void gfxPlatformFontList::FontPrefs::Init() {
if (AppShutdown::IsInOrBeyond(ShutdownPhase::XPCOMShutdownFinal)) {
return;
}
nsIPrefBranch* prefRootBranch = Preferences::GetRootBranch();
if (!prefRootBranch) {
return;
}
nsTArray<nsCString> prefNames;
if (NS_SUCCEEDED(prefRootBranch->GetChildList(kNamePrefix, prefNames))) {
for (auto& prefName : prefNames) {
nsAutoCString value;
if (NS_SUCCEEDED(Preferences::GetCString(prefName.get(), value))) {
nsAutoCString pref(Substring(prefName, sizeof(kNamePrefix) - 1));
mFontName.InsertOrUpdate(pref, value);
}
}
}
if (NS_SUCCEEDED(prefRootBranch->GetChildList(kNameListPrefix, prefNames))) {
for (auto& prefName : prefNames) {
nsAutoCString value;
if (NS_SUCCEEDED(Preferences::GetCString(prefName.get(), value))) {
nsAutoCString pref(Substring(prefName, sizeof(kNameListPrefix) - 1));
mFontNameList.InsertOrUpdate(pref, value);
}
}
}
mEmojiHasUserValue = Preferences::HasUserValue("font.name-list.emoji");
}
bool gfxPlatformFontList::FontPrefs::LookupName(const nsACString& aPref,
nsACString& aValue) const {
if (const auto& value = mFontName.Lookup(aPref)) {
aValue = *value;
return true;
}
return false;
}
bool gfxPlatformFontList::FontPrefs::LookupNameList(const nsACString& aPref,
nsACString& aValue) const {
if (const auto& value = mFontNameList.Lookup(aPref)) {
aValue = *value;
return true;
}
return false;
}
bool gfxPlatformFontList::IsKnownIconFontFamily(
const nsAtom* aFamilyName) const {
nsAtomCString fam(aFamilyName);
ToLowerCase(fam);
return mIconFontsSet.Contains(fam);
}
#undef LOG
#undef LOG_ENABLED
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