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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "mozilla/dom/FontFaceImpl.h"
#include <algorithm>
#include "gfxFontUtils.h"
#include "gfxPlatformFontList.h"
#include "mozilla/dom/CSSFontFaceRule.h"
#include "mozilla/dom/FontFaceBinding.h"
#include "mozilla/dom/FontFaceSetImpl.h"
#include "mozilla/dom/TypedArray.h"
#include "mozilla/dom/UnionTypes.h"
#include "mozilla/ServoBindings.h"
#include "mozilla/ServoCSSParser.h"
#include "mozilla/ServoUtils.h"
#include "mozilla/StaticPrefs_layout.h"
#include "mozilla/dom/Document.h"
#include "nsStyleUtil.h"
namespace mozilla {
namespace dom {
// -- FontFaceBufferSource ---------------------------------------------------
/**
* An object that wraps a FontFace object and exposes its ArrayBuffer
* or ArrayBufferView data in a form the user font set can consume.
*/
class FontFaceBufferSource : public gfxFontFaceBufferSource {
public:
FontFaceBufferSource(uint8_t* aBuffer, uint32_t aLength)
: mBuffer(aBuffer), mLength(aLength) {}
void TakeBuffer(uint8_t*& aBuffer, uint32_t& aLength) override {
MOZ_ASSERT(mBuffer,
"only call TakeBuffer once on a given "
"FontFaceBufferSource object");
aBuffer = mBuffer;
aLength = mLength;
mBuffer = nullptr;
mLength = 0;
}
private:
~FontFaceBufferSource() override {
if (mBuffer) {
free(mBuffer);
}
}
uint8_t* mBuffer;
uint32_t mLength;
};
// -- FontFaceImpl -----------------------------------------------------------
FontFaceImpl::FontFaceImpl(FontFace* aOwner, FontFaceSetImpl* aFontFaceSet)
: mOwner(aOwner),
mStatus(FontFaceLoadStatus::Unloaded),
mSourceType(SourceType(0)),
mFontFaceSet(aFontFaceSet),
mUnicodeRangeDirty(true),
mInFontFaceSet(false) {}
FontFaceImpl::~FontFaceImpl() {
// Assert that we don't drop any FontFace objects during a Servo traversal,
// since PostTraversalTask objects can hold raw pointers to FontFaces.
MOZ_ASSERT(!gfxFontUtils::IsInServoTraversal());
SetUserFontEntry(nullptr);
}
#ifdef DEBUG
void FontFaceImpl::AssertIsOnOwningThread() const {
mFontFaceSet->AssertIsOnOwningThread();
}
#endif
void FontFaceImpl::Destroy() {
mInFontFaceSet = false;
SetUserFontEntry(nullptr);
mOwner = nullptr;
}
static FontFaceLoadStatus LoadStateToStatus(
gfxUserFontEntry::UserFontLoadState aLoadState) {
switch (aLoadState) {
case gfxUserFontEntry::UserFontLoadState::STATUS_NOT_LOADED:
return FontFaceLoadStatus::Unloaded;
case gfxUserFontEntry::UserFontLoadState::STATUS_LOAD_PENDING:
case gfxUserFontEntry::UserFontLoadState::STATUS_LOADING:
return FontFaceLoadStatus::Loading;
case gfxUserFontEntry::UserFontLoadState::STATUS_LOADED:
return FontFaceLoadStatus::Loaded;
case gfxUserFontEntry::UserFontLoadState::STATUS_FAILED:
return FontFaceLoadStatus::Error;
}
MOZ_ASSERT_UNREACHABLE("invalid aLoadState value");
return FontFaceLoadStatus::Error;
}
already_AddRefed<FontFaceImpl> FontFaceImpl::CreateForRule(
FontFace* aOwner, FontFaceSetImpl* aFontFaceSet,
StyleLockedFontFaceRule* aRule) {
RefPtr<FontFaceImpl> obj = new FontFaceImpl(aOwner, aFontFaceSet);
obj->mRule = aRule;
obj->mSourceType = eSourceType_FontFaceRule;
obj->mInFontFaceSet = true;
return obj.forget();
}
void FontFaceImpl::InitializeSourceURL(const nsACString& aURL) {
MOZ_ASSERT(mOwner);
mSourceType = eSourceType_URLs;
IgnoredErrorResult rv;
SetDescriptor(eCSSFontDesc_Src, aURL, rv);
if (rv.Failed()) {
mOwner->MaybeReject(NS_ERROR_DOM_SYNTAX_ERR);
SetStatus(FontFaceLoadStatus::Error);
}
}
void FontFaceImpl::InitializeSourceBuffer(uint8_t* aBuffer, uint32_t aLength) {
MOZ_ASSERT(mOwner);
MOZ_ASSERT(!mBufferSource);
mSourceType = FontFaceImpl::eSourceType_Buffer;
if (aBuffer) {
mBufferSource = new FontFaceBufferSource(aBuffer, aLength);
}
SetStatus(FontFaceLoadStatus::Loading);
DoLoad();
}
void FontFaceImpl::GetFamily(nsACString& aResult) {
GetDesc(eCSSFontDesc_Family, aResult);
}
void FontFaceImpl::SetFamily(const nsACString& aValue, ErrorResult& aRv) {
mFontFaceSet->FlushUserFontSet();
if (SetDescriptor(eCSSFontDesc_Family, aValue, aRv)) {
DescriptorUpdated();
}
}
void FontFaceImpl::GetStyle(nsACString& aResult) {
GetDesc(eCSSFontDesc_Style, aResult);
}
void FontFaceImpl::SetStyle(const nsACString& aValue, ErrorResult& aRv) {
if (SetDescriptor(eCSSFontDesc_Style, aValue, aRv)) {
DescriptorUpdated();
}
}
void FontFaceImpl::GetWeight(nsACString& aResult) {
GetDesc(eCSSFontDesc_Weight, aResult);
}
void FontFaceImpl::SetWeight(const nsACString& aValue, ErrorResult& aRv) {
mFontFaceSet->FlushUserFontSet();
if (SetDescriptor(eCSSFontDesc_Weight, aValue, aRv)) {
DescriptorUpdated();
}
}
void FontFaceImpl::GetStretch(nsACString& aResult) {
GetDesc(eCSSFontDesc_Stretch, aResult);
}
void FontFaceImpl::SetStretch(const nsACString& aValue, ErrorResult& aRv) {
mFontFaceSet->FlushUserFontSet();
if (SetDescriptor(eCSSFontDesc_Stretch, aValue, aRv)) {
DescriptorUpdated();
}
}
void FontFaceImpl::GetUnicodeRange(nsACString& aResult) {
GetDesc(eCSSFontDesc_UnicodeRange, aResult);
}
void FontFaceImpl::SetUnicodeRange(const nsACString& aValue, ErrorResult& aRv) {
mFontFaceSet->FlushUserFontSet();
if (SetDescriptor(eCSSFontDesc_UnicodeRange, aValue, aRv)) {
DescriptorUpdated();
}
}
void FontFaceImpl::GetVariant(nsACString& aResult) {
// XXX Just expose the font-variant descriptor as "normal" until we
aResult.AssignLiteral("normal");
}
void FontFaceImpl::SetVariant(const nsACString& aValue, ErrorResult& aRv) {
// XXX Ignore assignments to variant until we support font-variant
}
void FontFaceImpl::GetFeatureSettings(nsACString& aResult) {
GetDesc(eCSSFontDesc_FontFeatureSettings, aResult);
}
void FontFaceImpl::SetFeatureSettings(const nsACString& aValue,
ErrorResult& aRv) {
mFontFaceSet->FlushUserFontSet();
if (SetDescriptor(eCSSFontDesc_FontFeatureSettings, aValue, aRv)) {
DescriptorUpdated();
}
}
void FontFaceImpl::GetVariationSettings(nsACString& aResult) {
GetDesc(eCSSFontDesc_FontVariationSettings, aResult);
}
void FontFaceImpl::SetVariationSettings(const nsACString& aValue,
ErrorResult& aRv) {
mFontFaceSet->FlushUserFontSet();
if (SetDescriptor(eCSSFontDesc_FontVariationSettings, aValue, aRv)) {
DescriptorUpdated();
}
}
void FontFaceImpl::GetDisplay(nsACString& aResult) {
GetDesc(eCSSFontDesc_Display, aResult);
}
void FontFaceImpl::SetDisplay(const nsACString& aValue, ErrorResult& aRv) {
if (SetDescriptor(eCSSFontDesc_Display, aValue, aRv)) {
DescriptorUpdated();
}
}
void FontFaceImpl::GetAscentOverride(nsACString& aResult) {
GetDesc(eCSSFontDesc_AscentOverride, aResult);
}
void FontFaceImpl::SetAscentOverride(const nsACString& aValue,
ErrorResult& aRv) {
if (SetDescriptor(eCSSFontDesc_AscentOverride, aValue, aRv)) {
DescriptorUpdated();
}
}
void FontFaceImpl::GetDescentOverride(nsACString& aResult) {
GetDesc(eCSSFontDesc_DescentOverride, aResult);
}
void FontFaceImpl::SetDescentOverride(const nsACString& aValue,
ErrorResult& aRv) {
if (SetDescriptor(eCSSFontDesc_DescentOverride, aValue, aRv)) {
DescriptorUpdated();
}
}
void FontFaceImpl::GetLineGapOverride(nsACString& aResult) {
GetDesc(eCSSFontDesc_LineGapOverride, aResult);
}
void FontFaceImpl::SetLineGapOverride(const nsACString& aValue,
ErrorResult& aRv) {
if (SetDescriptor(eCSSFontDesc_LineGapOverride, aValue, aRv)) {
DescriptorUpdated();
}
}
void FontFaceImpl::GetSizeAdjust(nsACString& aResult) {
GetDesc(eCSSFontDesc_SizeAdjust, aResult);
}
void FontFaceImpl::SetSizeAdjust(const nsACString& aValue, ErrorResult& aRv) {
if (SetDescriptor(eCSSFontDesc_SizeAdjust, aValue, aRv)) {
DescriptorUpdated();
}
}
void FontFaceImpl::DescriptorUpdated() {
// If we haven't yet initialized mUserFontEntry, no need to do anything here;
// we'll respect the updated descriptor when the time comes to create it.
if (!mUserFontEntry) {
return;
}
gfxUserFontAttributes attr;
RefPtr<gfxUserFontEntry> newEntry;
if (GetAttributes(attr)) {
newEntry = mFontFaceSet->FindOrCreateUserFontEntryFromFontFace(
this, std::move(attr), StyleOrigin::Author);
}
SetUserFontEntry(newEntry);
// Behind the scenes, this will actually update the existing entry and return
// it, rather than create a new one.
if (mInFontFaceSet) {
mFontFaceSet->MarkUserFontSetDirty();
}
for (auto& set : mOtherFontFaceSets) {
set->MarkUserFontSetDirty();
}
}
FontFaceLoadStatus FontFaceImpl::Status() { return mStatus; }
void FontFaceImpl::Load(ErrorResult& aRv) {
mFontFaceSet->FlushUserFontSet();
// Calling Load on a FontFace constructed with an ArrayBuffer data source,
// or on one that is already loading (or has finished loading), has no
// effect.
if (mSourceType == eSourceType_Buffer ||
mStatus != FontFaceLoadStatus::Unloaded) {
return;
}
// Calling the user font entry's Load method will end up setting our
// status to Loading, but the spec requires us to set it to Loading
// here.
SetStatus(FontFaceLoadStatus::Loading);
DoLoad();
}
gfxUserFontEntry* FontFaceImpl::CreateUserFontEntry() {
if (!mUserFontEntry) {
MOZ_ASSERT(!HasRule(),
"Rule backed FontFace objects should already have a user font "
"entry by the time Load() can be called on them");
gfxUserFontAttributes attr;
if (GetAttributes(attr)) {
RefPtr<gfxUserFontEntry> newEntry =
mFontFaceSet->FindOrCreateUserFontEntryFromFontFace(
this, std::move(attr), StyleOrigin::Author);
if (newEntry) {
SetUserFontEntry(newEntry);
}
}
}
return mUserFontEntry;
}
void FontFaceImpl::DoLoad() {
if (!CreateUserFontEntry()) {
return;
}
mUserFontEntry->Load();
}
void FontFaceImpl::SetStatus(FontFaceLoadStatus aStatus) {
gfxFontUtils::AssertSafeThreadOrServoFontMetricsLocked();
if (mStatus == aStatus) {
return;
}
if (aStatus < mStatus) {
// We're being asked to go backwards in status! Normally, this shouldn't
// happen. But it can if the FontFace had a user font entry that had
// loaded, but then was given a new one by FontFaceSet::InsertRuleFontFace
// if we used a local() rule. For now, just ignore the request to
// go backwards in status.
return;
}
mStatus = aStatus;
if (mInFontFaceSet) {
mFontFaceSet->OnFontFaceStatusChanged(this);
}
for (FontFaceSetImpl* otherSet : mOtherFontFaceSets) {
otherSet->OnFontFaceStatusChanged(this);
}
UpdateOwnerPromise();
}
void FontFaceImpl::UpdateOwnerPromise() {
if (!mFontFaceSet->IsOnOwningThread()) {
mFontFaceSet->DispatchToOwningThread(
"FontFaceImpl::UpdateOwnerPromise",
[self = RefPtr{this}] { self->UpdateOwnerPromise(); });
return;
}
if (NS_WARN_IF(!mOwner)) {
return;
}
if (mStatus == FontFaceLoadStatus::Loaded) {
mOwner->MaybeResolve();
} else if (mStatus == FontFaceLoadStatus::Error) {
if (mSourceType == eSourceType_Buffer) {
mOwner->MaybeReject(NS_ERROR_DOM_SYNTAX_ERR);
} else {
mOwner->MaybeReject(NS_ERROR_DOM_NETWORK_ERR);
}
}
}
// Boolean result indicates whether the value of the descriptor was actually
// changed.
bool FontFaceImpl::SetDescriptor(nsCSSFontDesc aFontDesc,
const nsACString& aValue, ErrorResult& aRv) {
// FIXME We probably don't need to distinguish between this anymore
// since we have common backend now.
NS_ASSERTION(!HasRule(), "we don't handle rule backed FontFace objects yet");
if (HasRule()) {
return false;
}
RefPtr<URLExtraData> url = mFontFaceSet->GetURLExtraData();
if (NS_WARN_IF(!url)) {
// This should only happen on worker threads, where we failed to initialize
// the worker before it was shutdown.
aRv.ThrowInvalidStateError("Missing URLExtraData");
return false;
}
// FIXME(heycam): Should not allow modification of FontFaces that are
// CSS-connected and whose rule is read only.
bool changed;
if (!Servo_FontFaceRule_SetDescriptor(GetData(), aFontDesc, &aValue, url,
&changed)) {
aRv.ThrowSyntaxError("Invalid font descriptor");
return false;
}
if (!changed) {
return false;
}
if (aFontDesc == eCSSFontDesc_UnicodeRange) {
mUnicodeRangeDirty = true;
}
return true;
}
bool FontFaceImpl::SetDescriptors(const nsACString& aFamily,
const FontFaceDescriptors& aDescriptors) {
MOZ_ASSERT(!HasRule());
MOZ_ASSERT(!mDescriptors);
mDescriptors = Servo_FontFaceRule_CreateEmpty().Consume();
// Helper to call SetDescriptor and return true on success, false on failure.
auto setDesc = [=](nsCSSFontDesc aDesc, const nsACString& aVal) -> bool {
IgnoredErrorResult rv;
SetDescriptor(aDesc, aVal, rv);
return !rv.Failed();
};
// Parse all of the mDescriptors in aInitializer, which are the values
// we got from the JS constructor.
if (!setDesc(eCSSFontDesc_Family, aFamily) ||
!setDesc(eCSSFontDesc_Style, aDescriptors.mStyle) ||
!setDesc(eCSSFontDesc_Weight, aDescriptors.mWeight) ||
!setDesc(eCSSFontDesc_Stretch, aDescriptors.mStretch) ||
!setDesc(eCSSFontDesc_UnicodeRange, aDescriptors.mUnicodeRange) ||
!setDesc(eCSSFontDesc_FontFeatureSettings,
aDescriptors.mFeatureSettings) ||
(StaticPrefs::layout_css_font_variations_enabled() &&
!setDesc(eCSSFontDesc_FontVariationSettings,
aDescriptors.mVariationSettings)) ||
!setDesc(eCSSFontDesc_Display, aDescriptors.mDisplay) ||
((!setDesc(eCSSFontDesc_AscentOverride, aDescriptors.mAscentOverride) ||
!setDesc(eCSSFontDesc_DescentOverride, aDescriptors.mDescentOverride) ||
!setDesc(eCSSFontDesc_LineGapOverride,
aDescriptors.mLineGapOverride))) ||
(StaticPrefs::layout_css_size_adjust_enabled() &&
!setDesc(eCSSFontDesc_SizeAdjust, aDescriptors.mSizeAdjust))) {
// If any of the descriptors failed to parse, none of them should be set
// on the FontFace.
mDescriptors = Servo_FontFaceRule_CreateEmpty().Consume();
if (mOwner) {
mOwner->MaybeReject(NS_ERROR_DOM_SYNTAX_ERR);
}
SetStatus(FontFaceLoadStatus::Error);
return false;
}
return true;
}
void FontFaceImpl::GetDesc(nsCSSFontDesc aDescID, nsACString& aResult) const {
aResult.Truncate();
Servo_FontFaceRule_GetDescriptorCssText(GetData(), aDescID, &aResult);
// Fill in a default value for missing descriptors.
if (aResult.IsEmpty()) {
if (aDescID == eCSSFontDesc_UnicodeRange) {
aResult.AssignLiteral("U+0-10FFFF");
} else if (aDescID == eCSSFontDesc_Display) {
aResult.AssignLiteral("auto");
} else if (aDescID != eCSSFontDesc_Family && aDescID != eCSSFontDesc_Src) {
aResult.AssignLiteral("normal");
}
}
}
void FontFaceImpl::SetUserFontEntry(gfxUserFontEntry* aEntry) {
AssertIsOnOwningThread();
if (mUserFontEntry == aEntry) {
return;
}
if (mUserFontEntry) {
mUserFontEntry->RemoveFontFace(this);
}
auto* entry = static_cast<Entry*>(aEntry);
if (entry) {
entry->AddFontFace(this);
}
mUserFontEntry = entry;
if (!mUserFontEntry) {
return;
}
MOZ_ASSERT(mUserFontEntry->HasUserFontSet(mFontFaceSet),
"user font entry must be associated with the same user font set "
"as the FontFace");
// Our newly assigned user font entry might be in the process of or
// finished loading, so set our status accordingly. But only do so
// if we're not going "backwards" in status, which could otherwise
// happen in this case:
//
// new FontFace("ABC", "url(x)").load();
//
// where the SetUserFontEntry call (from the after-initialization
// DoLoad call) comes after the author's call to load(), which set mStatus
// to Loading.
FontFaceLoadStatus newStatus = LoadStateToStatus(mUserFontEntry->LoadState());
if (newStatus > mStatus) {
SetStatus(newStatus);
}
}
bool FontFaceImpl::GetAttributes(gfxUserFontAttributes& aAttr) {
StyleLockedFontFaceRule* data = GetData();
if (!data) {
return false;
}
nsAtom* fontFamily = Servo_FontFaceRule_GetFamilyName(data);
if (!fontFamily) {
return false;
}
aAttr.mFamilyName = nsAtomCString(fontFamily);
StyleComputedFontWeightRange weightRange;
if (Servo_FontFaceRule_GetFontWeight(data, &weightRange)) {
aAttr.mRangeFlags &= ~gfxFontEntry::RangeFlags::eAutoWeight;
aAttr.mWeight = WeightRange(FontWeight::FromFloat(weightRange._0),
FontWeight::FromFloat(weightRange._1));
}
StyleComputedFontStretchRange stretchRange;
if (Servo_FontFaceRule_GetFontStretch(data, &stretchRange)) {
aAttr.mRangeFlags &= ~gfxFontEntry::RangeFlags::eAutoStretch;
aAttr.mStretch = StretchRange(stretchRange._0, stretchRange._1);
}
auto styleDesc = StyleComputedFontStyleDescriptor::Normal();
if (Servo_FontFaceRule_GetFontStyle(data, &styleDesc)) {
aAttr.mRangeFlags &= ~gfxFontEntry::RangeFlags::eAutoSlantStyle;
switch (styleDesc.tag) {
case StyleComputedFontStyleDescriptor::Tag::Normal:
aAttr.mStyle = SlantStyleRange(FontSlantStyle::NORMAL);
break;
case StyleComputedFontStyleDescriptor::Tag::Italic:
aAttr.mStyle = SlantStyleRange(FontSlantStyle::ITALIC);
break;
case StyleComputedFontStyleDescriptor::Tag::Oblique:
aAttr.mStyle = SlantStyleRange(
FontSlantStyle::FromFloat(styleDesc.AsOblique()._0),
FontSlantStyle::FromFloat(styleDesc.AsOblique()._1));
break;
default:
MOZ_ASSERT_UNREACHABLE("Unhandled tag");
}
}
StylePercentage ascent{0};
if (Servo_FontFaceRule_GetAscentOverride(data, &ascent)) {
aAttr.mAscentOverride = ascent._0;
}
StylePercentage descent{0};
if (Servo_FontFaceRule_GetDescentOverride(data, &descent)) {
aAttr.mDescentOverride = descent._0;
}
StylePercentage lineGap{0};
if (Servo_FontFaceRule_GetLineGapOverride(data, &lineGap)) {
aAttr.mLineGapOverride = lineGap._0;
}
StylePercentage sizeAdjust;
if (Servo_FontFaceRule_GetSizeAdjust(data, &sizeAdjust)) {
aAttr.mSizeAdjust = sizeAdjust._0;
}
StyleFontLanguageOverride langOverride;
if (Servo_FontFaceRule_GetFontLanguageOverride(data, &langOverride)) {
aAttr.mLanguageOverride = langOverride._0;
}
Servo_FontFaceRule_GetFontDisplay(data, &aAttr.mFontDisplay);
Servo_FontFaceRule_GetFeatureSettings(data, &aAttr.mFeatureSettings);
Servo_FontFaceRule_GetVariationSettings(data, &aAttr.mVariationSettings);
Servo_FontFaceRule_GetSources(data, &aAttr.mSources);
aAttr.mUnicodeRanges = GetUnicodeRangeAsCharacterMap();
return true;
}
bool FontFaceImpl::HasLocalSrc() const {
AutoTArray<StyleFontFaceSourceListComponent, 8> components;
Servo_FontFaceRule_GetSources(GetData(), &components);
for (auto& component : components) {
if (component.tag == StyleFontFaceSourceListComponent::Tag::Local) {
return true;
}
}
return false;
}
nsAtom* FontFaceImpl::GetFamilyName() const {
return Servo_FontFaceRule_GetFamilyName(GetData());
}
void FontFaceImpl::DisconnectFromRule() {
MOZ_ASSERT(HasRule());
// Make a copy of the descriptors.
mDescriptors = Servo_FontFaceRule_Clone(mRule).Consume();
mRule = nullptr;
mInFontFaceSet = false;
}
bool FontFaceImpl::HasFontData() const {
return mSourceType == eSourceType_Buffer && mBufferSource;
}
already_AddRefed<gfxFontFaceBufferSource> FontFaceImpl::TakeBufferSource() {
MOZ_ASSERT(mBufferSource);
return mBufferSource.forget();
}
bool FontFaceImpl::IsInFontFaceSet(FontFaceSetImpl* aFontFaceSet) const {
if (mFontFaceSet == aFontFaceSet) {
return mInFontFaceSet;
}
return mOtherFontFaceSets.Contains(aFontFaceSet);
}
void FontFaceImpl::AddFontFaceSet(FontFaceSetImpl* aFontFaceSet) {
MOZ_ASSERT(!IsInFontFaceSet(aFontFaceSet));
auto doAddFontFaceSet = [&]() {
if (mFontFaceSet == aFontFaceSet) {
mInFontFaceSet = true;
} else {
mOtherFontFaceSets.AppendElement(aFontFaceSet);
}
};
if (mUserFontEntry) {
AutoWriteLock lock(mUserFontEntry->Lock());
doAddFontFaceSet();
} else {
doAddFontFaceSet();
}
}
void FontFaceImpl::RemoveFontFaceSet(FontFaceSetImpl* aFontFaceSet) {
MOZ_ASSERT(IsInFontFaceSet(aFontFaceSet));
auto doRemoveFontFaceSet = [&]() {
if (mFontFaceSet == aFontFaceSet) {
mInFontFaceSet = false;
} else {
mOtherFontFaceSets.RemoveElement(aFontFaceSet);
}
};
if (mUserFontEntry) {
AutoWriteLock lock(mUserFontEntry->Lock());
doRemoveFontFaceSet();
// The caller should be holding a strong reference to the FontFaceSetImpl.
mUserFontEntry->CheckUserFontSetLocked();
} else {
doRemoveFontFaceSet();
}
}
gfxCharacterMap* FontFaceImpl::GetUnicodeRangeAsCharacterMap() {
if (!mUnicodeRangeDirty) {
return mUnicodeRange;
}
size_t len;
const StyleUnicodeRange* rangesPtr =
Servo_FontFaceRule_GetUnicodeRanges(GetData(), &len);
Span<const StyleUnicodeRange> ranges(rangesPtr, len);
if (!ranges.IsEmpty()) {
RefPtr<gfxCharacterMap> charMap = new gfxCharacterMap();
for (auto& range : ranges) {
charMap->SetRange(range.start, range.end);
}
charMap->Compact();
// As it's common for multiple font resources to have the same
// unicode-range list, look for an existing copy of this map to share,
// or add this one to the sharing cache if not already present.
mUnicodeRange =
gfxPlatformFontList::PlatformFontList()->FindCharMap(charMap);
} else {
mUnicodeRange = nullptr;
}
mUnicodeRangeDirty = false;
return mUnicodeRange;
}
// -- FontFaceImpl::Entry
// --------------------------------------------------------
/* virtual */
void FontFaceImpl::Entry::SetLoadState(UserFontLoadState aLoadState) {
gfxUserFontEntry::SetLoadState(aLoadState);
FontFaceLoadStatus status = LoadStateToStatus(aLoadState);
nsTArray<RefPtr<FontFaceImpl>> fontFaces;
{
AutoReadLock lock(mLock);
fontFaces.SetCapacity(mFontFaces.Length());
for (FontFaceImpl* f : mFontFaces) {
fontFaces.AppendElement(f);
}
}
for (FontFaceImpl* impl : fontFaces) {
auto* setImpl = impl->GetPrimaryFontFaceSet();
if (setImpl->IsOnOwningThread()) {
impl->SetStatus(status);
} else {
setImpl->DispatchToOwningThread(
"FontFaceImpl::Entry::SetLoadState",
[self = RefPtr{impl}, status] { self->SetStatus(status); });
}
}
}
/* virtual */
void FontFaceImpl::Entry::GetUserFontSets(
nsTArray<RefPtr<gfxUserFontSet>>& aResult) {
AutoReadLock lock(mLock);
aResult.Clear();
if (mFontSet) {
aResult.AppendElement(mFontSet);
}
for (FontFaceImpl* f : mFontFaces) {
if (f->mInFontFaceSet) {
aResult.AppendElement(f->mFontFaceSet);
}
for (FontFaceSetImpl* s : f->mOtherFontFaceSets) {
aResult.AppendElement(s);
}
}
// Remove duplicates.
aResult.Sort();
auto it = std::unique(aResult.begin(), aResult.end());
aResult.TruncateLength(it - aResult.begin());
}
/* virtual */ already_AddRefed<gfxUserFontSet>
FontFaceImpl::Entry::GetUserFontSet() const {
AutoReadLock lock(mLock);
if (mFontSet) {
return do_AddRef(mFontSet);
}
if (NS_IsMainThread() && mLoadingFontSet) {
return do_AddRef(mLoadingFontSet);
}
return nullptr;
}
void FontFaceImpl::Entry::CheckUserFontSetLocked() {
// If this is the last font containing a strong reference to the set, we need
// to clear the reference as there is no longer anything guaranteeing the set
// will be kept alive.
if (mFontSet) {
auto* set = static_cast<FontFaceSetImpl*>(mFontSet);
for (FontFaceImpl* f : mFontFaces) {
if (f->mFontFaceSet == set || f->mOtherFontFaceSets.Contains(set)) {
return;
}
}
}
// If possible, promote the most recently added FontFace and its owning
// FontFaceSetImpl as the primary set.
if (!mFontFaces.IsEmpty()) {
mFontSet = mFontFaces.LastElement()->mFontFaceSet;
} else {
mFontSet = nullptr;
}
}
void FontFaceImpl::Entry::FindFontFaceOwners(nsTHashSet<FontFace*>& aOwners) {
AutoReadLock lock(mLock);
for (FontFaceImpl* f : mFontFaces) {
if (FontFace* owner = f->GetOwner()) {
aOwners.Insert(owner);
}
}
}
void FontFaceImpl::Entry::AddFontFace(FontFaceImpl* aFontFace) {
AutoWriteLock lock(mLock);
mFontFaces.AppendElement(aFontFace);
CheckUserFontSetLocked();
}
void FontFaceImpl::Entry::RemoveFontFace(FontFaceImpl* aFontFace) {
AutoWriteLock lock(mLock);
mFontFaces.RemoveElement(aFontFace);
CheckUserFontSetLocked();
}
} // namespace dom
} // namespace mozilla