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gfxPlatformFontList.cpp
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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/intl/LocaleService.h"
#include "mozilla/intl/MozLocale.h"
#include "mozilla/intl/OSPreferences.h"
#include "gfxPlatformFontList.h"
#include "gfxTextRun.h"
#include "gfxUserFontSet.h"
#include "SharedFontList-impl.h"
#include "nsCRT.h"
#include "nsGkAtoms.h"
#include "nsServiceManagerUtils.h"
#include "nsUnicharUtils.h"
#include "nsUnicodeProperties.h"
#include "nsXULAppAPI.h"
#include "mozilla/Attributes.h"
#include "mozilla/Likely.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/Mutex.h"
#include "mozilla/Preferences.h"
#include "mozilla/StaticPrefs_gfx.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/dom/IPCBlobUtils.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>
using namespace mozilla;
using mozilla::intl::Locale;
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, 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,
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
};
// prefs for the font info loader
#define FONT_LOADER_DELAY_PREF "gfx.font_loader.delay"
#define FONT_LOADER_INTERVAL_PREF "gfx.font_loader.interval"
static const char* kObservedPrefs[] = {"font.", "font.name-list.",
"intl.accept_languages", // hmmmm...
nullptr};
static const char kFontSystemWhitelistPref[] = "font.system.whitelist";
static const char kCJKFallbackOrderPref[] = "font.cjk_pref_fallback_order";
// 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() {}
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();
gfxFontCache::GetCache()->AgeAllGenerations();
}
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();
}
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;
}
gfxPlatformFontList::gfxPlatformFontList(bool aNeedFullnamePostscriptNames)
: mFontFamiliesMutex("gfxPlatformFontList::mFontFamiliesMutex"),
mFontFamilies(64),
mOtherFamilyNames(16),
mSharedCmaps(8),
mStartIndex(0),
mNumFamilies(0),
mFontlistInitCount(0),
mFontFamilyWhitelistActive(false) {
mOtherFamilyNamesInitialized = false;
if (aNeedFullnamePostscriptNames) {
mExtraNames = MakeUnique<ExtraNames>();
}
mFaceNameListsInitialized = false;
mLangService = nsLanguageAtomService::GetService();
LoadBadUnderlineList();
// 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());
}
gfxPlatformFontList::~gfxPlatformFontList() {
mSharedCmaps.Clear();
ClearLangGroupPrefFonts();
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());
gfxPlatformFontList::PlatformFontList()->UpdateFontList();
mozilla::dom::ContentParent::NotifyUpdatedFonts();
}
// number of CSS generic font families
const uint32_t kNumGenerics = 5;
void gfxPlatformFontList::ApplyWhitelist() {
nsTArray<nsCString> list;
gfxFontUtils::GetPrefsFontList(kFontSystemWhitelistPref, list);
uint32_t numFonts = list.Length();
mFontFamilyWhitelistActive = (numFonts > 0);
if (!mFontFamilyWhitelistActive) {
return;
}
nsTHashtable<nsCStringHashKey> familyNamesWhitelist;
for (uint32_t i = 0; i < numFonts; i++) {
nsAutoCString key;
ToLowerCase(list[i], key);
familyNamesWhitelist.PutEntry(key);
}
AutoTArray<RefPtr<gfxFontFamily>, 128> accepted;
for (auto iter = mFontFamilies.Iter(); !iter.Done(); iter.Next()) {
nsAutoCString fontFamilyName(iter.Key());
ToLowerCase(fontFamilyName);
if (familyNamesWhitelist.Contains(fontFamilyName)) {
accepted.AppendElement(iter.Data());
}
}
if (accepted.IsEmpty()) {
// 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.Put(fontFamilyName, f);
}
}
void gfxPlatformFontList::ApplyWhitelist(
nsTArray<fontlist::Family::InitData>& aFamilies) {
nsTArray<nsCString> list;
gfxFontUtils::GetPrefsFontList(kFontSystemWhitelistPref, list);
mFontFamilyWhitelistActive = !list.IsEmpty();
if (!mFontFamilyWhitelistActive) {
return;
}
nsTHashtable<nsCStringHashKey> familyNamesWhitelist;
for (const auto& item : list) {
nsAutoCString key;
ToLowerCase(item, key);
familyNamesWhitelist.PutEntry(key);
}
AutoTArray<fontlist::Family::InitData, 128> accepted;
bool keptNonHidden = false;
for (auto& f : aFamilies) {
if (f.mHidden || familyNamesWhitelist.Contains(f.mKey)) {
accepted.AppendElement(f);
if (!f.mHidden) {
keptNonHidden = true;
}
}
}
if (!keptNonHidden) {
// No (visible) families were whitelisted: ignore the whitelist
// and just leave the fontlist unchanged.
return;
}
aFamilies = accepted;
}
bool gfxPlatformFontList::AddWithLegacyFamilyName(const nsACString& aLegacyName,
gfxFontEntry* aFontEntry) {
bool added = false;
nsAutoCString key;
ToLowerCase(aLegacyName, key);
gfxFontFamily* family = mOtherFamilyNames.GetWeak(key);
if (!family) {
family = CreateFontFamily(aLegacyName);
family->SetHasStyles(true); // we don't want the family to search for
// faces, we're adding them directly here
mOtherFamilyNames.Put(key, family);
added = true;
}
family->AddFontEntry(aFontEntry->Clone());
return added;
}
nsresult gfxPlatformFontList::InitFontList() {
// This shouldn't be called from stylo threads!
MOZ_ASSERT(NS_IsMainThread());
mFontlistInitCount++;
if (LOG_FONTINIT_ENABLED()) {
LOG_FONTINIT(("(fontinit) system fontlist initialization\n"));
}
// rebuilding fontlist so clear out font/word caches
gfxFontCache* fontCache = gfxFontCache::GetCache();
if (fontCache) {
fontCache->AgeAllGenerations();
fontCache->FlushShapedWordCaches();
}
gfxPlatform::PurgeSkiaFontCache();
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
// Notify any current presContexts that fonts are being updated, so existing
// caches will no longer be valid.
obs->NotifyObservers(nullptr, "font-info-updated", nullptr);
}
mAliasTable.Clear();
mLocalNameTable.Clear();
CancelInitOtherFamilyNamesTask();
MutexAutoLock lock(mFontFamiliesMutex);
mFontFamilies.Clear();
mOtherFamilyNames.Clear();
mOtherFamilyNamesInitialized = false;
if (mExtraNames) {
mExtraNames->mFullnames.Clear();
mExtraNames->mPostscriptNames.Clear();
}
mFaceNameListsInitialized = false;
ClearLangGroupPrefFonts();
CancelLoader();
// initialize ranges of characters for which system-wide font search should be
// skipped
mCodepointsWithNoFonts.reset();
mCodepointsWithNoFonts.SetRange(0, 0x1f); // C0 controls
mCodepointsWithNoFonts.SetRange(0x7f, 0x9f); // C1 controls
mCodepointsWithNoFonts.SetRange(0xE000, 0xF8FF); // PUA
mCodepointsWithNoFonts.SetRange(0xF0000, 0x10FFFD); // Supplementary PUA
mCodepointsWithNoFonts.SetRange(0xfdd0, 0xfdef); // noncharacters
for (unsigned i = 0; i <= 0x100000; i += 0x10000) {
mCodepointsWithNoFonts.SetRange(i + 0xfffe, i + 0xffff); // noncharacters
}
// Forget any font family we previously chose for U+FFFD.
mReplacementCharFallbackFamily = FontFamily();
sPlatformFontList = this;
// 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 (auto i = mFontEntries.Iter(); !i.Done(); i.Next()) {
if (!i.Data()) {
continue;
}
i.Data()->mShmemCharacterMap = nullptr;
i.Data()->mShmemFace = nullptr;
i.Data()->mFamilyName = NS_LITERAL_CSTRING("");
}
mFontEntries.Clear();
mShmemCharMaps.Clear();
bool oldSharedList = mSharedFontList != nullptr;
mSharedFontList.reset(new fontlist::FontList(mFontlistInitCount));
InitSharedFontListForPlatform();
if (mSharedFontList->Initialized()) {
if (mLocalNameTable.Count()) {
SharedFontList()->SetLocalNames(mLocalNameTable);
mLocalNameTable.Clear();
}
} else {
// something went wrong, fall back to in-process list
mSharedFontList.reset(nullptr);
}
if (oldSharedList) {
if (XRE_IsParentProcess()) {
// notify all children of the change
mozilla::dom::ContentParent::NotifyRebuildFontList();
}
}
}
if (!SharedFontList()) {
nsresult rv = InitFontListForPlatform();
if (NS_FAILED(rv)) {
return rv;
}
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 = GetDefaultFont(&defStyle);
if (fam.mIsShared) {
auto face = fam.mShared->FindFaceForStyle(SharedFontList(), defStyle);
if (!face) {
mDefaultFontEntry = nullptr;
} else {
mDefaultFontEntry = GetOrCreateFontEntry(face, fam.mShared);
}
} else {
mDefaultFontEntry = fam.mUnshared->FindFontForStyle(defStyle);
}
return NS_OK;
}
void gfxPlatformFontList::FontListChanged() {
MOZ_ASSERT(!XRE_IsParentProcess());
if (SharedFontList() && SharedFontList()->NumLocalFaces()) {
// If we're using a shared local face-name list, this may have changed.
RebuildLocalFonts();
}
ForceGlobalReflow();
}
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;
}
dom::ContentChild::GetSingleton()->SendInitOtherFamilyNames(
list->GetGeneration(), mDefer, &pfl->mOtherFamilyNamesInitialized);
return NS_OK;
}
private:
bool mDefer;
};
#define OTHERNAMES_TIMEOUT 200
void gfxPlatformFontList::InitOtherFamilyNames(
bool aDeferOtherFamilyNamesLoading) {
if (mOtherFamilyNamesInitialized) {
return;
}
if (SharedFontList() && !XRE_IsParentProcess()) {
if (NS_IsMainThread()) {
dom::ContentChild::GetSingleton()->SendInitOtherFamilyNames(
SharedFontList()->GetGeneration(), aDeferOtherFamilyNamesLoading,
&mOtherFamilyNamesInitialized);
} else {
NS_DispatchToMainThread(
new InitOtherFamilyNamesForStylo(aDeferOtherFamilyNamesLoading));
}
return;
}
// 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 &&
Preferences::GetUint(FONT_LOADER_DELAY_PREF) > 0) {
if (!mPendingOtherFamilyNameTask) {
RefPtr<mozilla::CancelableRunnable> task =
new InitOtherFamilyNamesRunnable();
mPendingOtherFamilyNameTask = task;
NS_DispatchToMainThreadQueue(task.forget(), EventQueuePriority::Idle);
}
} else {
InitOtherFamilyNamesInternal(false);
}
}
// 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 (auto iter = mFontFamilies.Iter(); !iter.Done(); iter.Next()) {
nsCStringHashKey::KeyType key = iter.Key();
RefPtr<gfxFontFamily>& family = iter.Data();
// 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<nsTHashtable<nsCStringHashKey>>(2);
}
mFaceNamesMissed->PutEntry(aFaceName);
}
}
return lookup;
}
gfxFontEntry* gfxPlatformFontList::LookupInSharedFaceNameList(
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) {
family = &list->Families()[rec->mFamilyIndex];
face = static_cast<fontlist::Face*>(
family->Faces(list)[rec->mFaceIndex].ToPtr(list));
}
} else {
list->SearchForLocalFace(keyName, &family, &face);
}
if (!face || !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::PreloadNamesList() {
AutoTArray<nsCString, 10> preloadFonts;
gfxFontUtils::GetPrefsFontList("font.preload-names-list", preloadFonts);
uint32_t numFonts = preloadFonts.Length();
for (uint32_t i = 0; i < numFonts; i++) {
nsAutoCString key;
GenerateFontListKey(preloadFonts[i], key);
// only search canonical names!
gfxFontFamily* familyEntry = mFontFamilies.GetWeak(key);
if (familyEntry) {
familyEntry->ReadOtherFamilyNames(this);
}
}
}
void gfxPlatformFontList::LoadBadUnderlineList() {
gfxFontUtils::GetPrefsFontList("font.blacklist.underline_offset",
mBadUnderlineFamilyNames);
for (auto& fam : mBadUnderlineFamilyNames) {
ToLowerCase(fam);
}
mBadUnderlineFamilyNames.Compact();
mBadUnderlineFamilyNames.Sort();
}
void gfxPlatformFontList::UpdateFontList() {
MOZ_ASSERT(NS_IsMainThread());
InitFontList();
RebuildLocalFonts();
}
void gfxPlatformFontList::GetFontList(nsAtom* aLangGroup,
const nsACString& aGenericFamily,
nsTArray<nsString>& aListOfFonts) {
if (SharedFontList()) {
fontlist::FontList* list = SharedFontList();
const fontlist::Family* families = list->Families();
for (uint32_t i = 0; i < list->NumFamilies(); i++) {
auto& f = families[i];
if (f.IsHidden()) {
continue;
}
// XXX TODO: filter families for aGenericFamily, if supported by platform
aListOfFonts.AppendElement(
NS_ConvertUTF8toUTF16(f.DisplayName().AsString(list)));
}
return;
}
MutexAutoLock lock(mFontFamiliesMutex);
for (auto iter = mFontFamilies.Iter(); !iter.Done(); iter.Next()) {
RefPtr<gfxFontFamily>& family = iter.Data();
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) {
for (auto iter = mFontFamilies.Iter(); !iter.Done(); iter.Next()) {
RefPtr<gfxFontFamily>& family = iter.Data();
aFamilyArray.AppendElement(family);
}
}
gfxFontEntry* gfxPlatformFontList::SystemFindFontForChar(
uint32_t aCh, uint32_t aNextCh, Script aRunScript,
const gfxFontStyle* aStyle) {
MOZ_ASSERT(!mCodepointsWithNoFonts.test(aCh),
"don't call for codepoints already known to be unsupported");
gfxFontEntry* fontEntry = nullptr;
// 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) {
if (mReplacementCharFallbackFamily.mIsShared &&
mReplacementCharFallbackFamily.mShared) {
fontlist::Face* face =
mReplacementCharFallbackFamily.mShared->FindFaceForStyle(
SharedFontList(), *aStyle);
if (face) {
fontEntry =
GetOrCreateFontEntry(face, mReplacementCharFallbackFamily.mShared);
}
} else if (!mReplacementCharFallbackFamily.mIsShared &&
mReplacementCharFallbackFamily.mUnshared) {
fontEntry =
mReplacementCharFallbackFamily.mUnshared->FindFontForStyle(*aStyle);
}
// 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;
}
}
TimeStamp start = TimeStamp::Now();
// search commonly available fonts
bool common = true;
FontFamily fallbackFamily;
fontEntry =
CommonFontFallback(aCh, aNextCh, aRunScript, aStyle, &fallbackFamily);
// if didn't find a font, do system-wide fallback (except for specials)
uint32_t cmapCount = 0;
if (!fontEntry) {
common = false;
fontEntry =
GlobalFontFallback(aCh, aRunScript, aStyle, cmapCount, &fallbackFamily);
}
TimeDuration elapsed = TimeStamp::Now() - start;
LogModule* log = gfxPlatform::GetLog(eGfxLog_textrun);
if (MOZ_UNLIKELY(MOZ_LOG_TEST(log, LogLevel::Warning))) {
Script script = mozilla::unicode::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),
(fontEntry ? fontEntry->Name().get() : "<none>"),
int32_t(elapsed.ToMicroseconds()), cmapCount));
}
// no match? add to set of non-matching codepoints
if (!fontEntry) {
mCodepointsWithNoFonts.set(aCh);
} else if (aCh == 0xFFFD && fontEntry) {
mReplacementCharFallbackFamily = 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 fontEntry;
}
#define NUM_FALLBACK_FONTS 8
gfxFontEntry* gfxPlatformFontList::CommonFontFallback(
uint32_t aCh, uint32_t aNextCh, Script aRunScript,
const gfxFontStyle* aMatchStyle, FontFamily* aMatchedFamily) {
AutoTArray<const char*, NUM_FALLBACK_FONTS> defaultFallbacks;
gfxPlatform::GetPlatform()->GetCommonFallbackFonts(aCh, aNextCh, aRunScript,
defaultFallbacks);
GlobalFontMatch data(aCh, *aMatchStyle);
if (SharedFontList()) {
for (const auto name : defaultFallbacks) {
fontlist::Family* family = FindSharedFamily(nsDependentCString(name));
if (!family) {
continue;
}
if (family->IsHidden()) {
continue;
}
family->SearchAllFontsForChar(SharedFontList(), &data);
if (data.mBestMatch) {
*aMatchedFamily = FontFamily(family);
return data.mBestMatch;
}
}
} else {
for (const auto name : defaultFallbacks) {
gfxFontFamily* fallback =
FindFamilyByCanonicalName(nsDependentCString(name));
if (fallback) {
fallback->FindFontForChar(&data);
if (data.mBestMatch) {
*aMatchedFamily = FontFamily(fallback);
return data.mBestMatch;
}
}
}
}
return nullptr;
}
gfxFontEntry* gfxPlatformFontList::GlobalFontFallback(
const uint32_t aCh, Script aRunScript, const gfxFontStyle* aMatchStyle,
uint32_t& aCmapCount, FontFamily* aMatchedFamily) {
bool useCmaps = IsFontFamilyWhitelistActive() ||
gfxPlatform::GetPlatform()->UseCmapsDuringSystemFallback();
if (!useCmaps) {
// Allow platform-specific fallback code to try and find a usable font
gfxFontEntry* fe = PlatformGlobalFontFallback(aCh, aRunScript, aMatchStyle,
aMatchedFamily);
if (fe) {
return fe;
}
}
// otherwise, try to find it among local fonts
GlobalFontMatch data(aCh, *aMatchStyle);
if (SharedFontList()) {
fontlist::Family* families = SharedFontList()->Families();
for (uint32_t i = 0; i < SharedFontList()->NumFamilies(); i++) {
fontlist::Family& family = families[i];
if (family.IsHidden()) {
continue;
}
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;
}
} else {
// iterate over all font families to find a font that support the
// character
for (auto iter = mFontFamilies.Iter(); !iter.Done(); iter.Next()) {
RefPtr<gfxFontFamily>& family = iter.Data();
// 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;
}
}
return nullptr;
}
gfxFontFamily* gfxPlatformFontList::CheckFamily(gfxFontFamily* aFamily) {
if (aFamily && !aFamily->HasStyles()) {
aFamily->FindStyleVariations();
aFamily->CheckForSimpleFamily();
}
if (aFamily && aFamily->GetFontList().Length() == 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(
StyleGenericFontFamily aGeneric, const nsACString& aFamily,
nsTArray<FamilyAndGeneric>* aOutput, FindFamiliesFlags aFlags,
gfxFontStyle* aStyle, gfxFloat aDevToCssSize) {
nsAutoCString key;
GenerateFontListKey(aFamily, key);
if (SharedFontList()) {
fontlist::Family* family = SharedFontList()->FindFamily(key);
if (family) {
aOutput->AppendElement(FamilyAndGeneric(family, aGeneric));
return true;
}
// 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 (!mOtherFamilyNamesInitialized) {