diff options
Diffstat (limited to 'layout/style/FontFace.cpp')
| -rw-r--r-- | layout/style/FontFace.cpp | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/layout/style/FontFace.cpp b/layout/style/FontFace.cpp new file mode 100644 index 0000000000..61ce5b9c38 --- /dev/null +++ b/layout/style/FontFace.cpp @@ -0,0 +1,319 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "mozilla/dom/FontFace.h" + +#include <algorithm> +#include "gfxFontUtils.h" +#include "mozilla/dom/CSSFontFaceRule.h" +#include "mozilla/dom/FontFaceBinding.h" +#include "mozilla/dom/FontFaceImpl.h" +#include "mozilla/dom/FontFaceSet.h" +#include "mozilla/dom/Promise.h" +#include "mozilla/dom/TypedArray.h" +#include "mozilla/dom/UnionTypes.h" +#include "mozilla/CycleCollectedJSContext.h" +#include "mozilla/ServoBindings.h" +#include "mozilla/ServoCSSParser.h" +#include "mozilla/ServoStyleSet.h" +#include "mozilla/ServoUtils.h" +#include "mozilla/StaticPrefs_layout.h" +#include "nsStyleUtil.h" + +namespace mozilla { +namespace dom { + +// -- Utility functions ------------------------------------------------------ + +template <typename T> +static void GetDataFrom(const T& aObject, uint8_t*& aBuffer, + uint32_t& aLength) { + MOZ_ASSERT(!aBuffer); + aObject.ComputeState(); + // We use malloc here rather than a FallibleTArray or fallible + // operator new[] since the gfxUserFontEntry will be calling free + // on it. + aBuffer = (uint8_t*)malloc(aObject.Length()); + if (!aBuffer) { + return; + } + memcpy((void*)aBuffer, aObject.Data(), aObject.Length()); + aLength = aObject.Length(); +} + +// -- FontFace --------------------------------------------------------------- + +NS_IMPL_CYCLE_COLLECTION_CLASS(FontFace) + +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(FontFace) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mParent) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLoaded) +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END + +NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(FontFace) + NS_IMPL_CYCLE_COLLECTION_UNLINK(mParent) + NS_IMPL_CYCLE_COLLECTION_UNLINK(mLoaded) + tmp->Destroy(); + NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER +NS_IMPL_CYCLE_COLLECTION_UNLINK_END + +NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(FontFace) + NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER +NS_IMPL_CYCLE_COLLECTION_TRACE_END + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FontFace) + NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY + NS_INTERFACE_MAP_ENTRY(nsISupports) +NS_INTERFACE_MAP_END + +NS_IMPL_CYCLE_COLLECTING_ADDREF(FontFace) +NS_IMPL_CYCLE_COLLECTING_RELEASE(FontFace) + +FontFace::FontFace(nsIGlobalObject* aParent) + : mParent(aParent), mLoadedRejection(NS_OK) {} + +FontFace::~FontFace() { + // 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()); + Destroy(); +} + +void FontFace::Destroy() { mImpl->Destroy(); } + +JSObject* FontFace::WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) { + return FontFace_Binding::Wrap(aCx, this, aGivenProto); +} + +already_AddRefed<FontFace> FontFace::CreateForRule( + nsIGlobalObject* aGlobal, FontFaceSet* aFontFaceSet, + StyleLockedFontFaceRule* aRule) { + FontFaceSetImpl* setImpl = aFontFaceSet->GetImpl(); + MOZ_ASSERT(setImpl); + + RefPtr<FontFace> obj = new FontFace(aGlobal); + obj->mImpl = FontFaceImpl::CreateForRule(obj, setImpl, aRule); + return obj.forget(); +} + +already_AddRefed<FontFace> FontFace::Constructor( + const GlobalObject& aGlobal, const nsACString& aFamily, + const UTF8StringOrArrayBufferOrArrayBufferView& aSource, + const FontFaceDescriptors& aDescriptors, ErrorResult& aRv) { + nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports()); + + FontFaceSet* set = global->GetFonts(); + if (NS_WARN_IF(!set)) { + aRv.Throw(NS_ERROR_FAILURE); + return nullptr; + } + + FontFaceSetImpl* setImpl = set->GetImpl(); + if (NS_WARN_IF(!setImpl)) { + aRv.Throw(NS_ERROR_FAILURE); + return nullptr; + } + + RefPtr<FontFace> obj = new FontFace(global); + obj->mImpl = new FontFaceImpl(obj, setImpl); + if (!obj->mImpl->SetDescriptors(aFamily, aDescriptors)) { + return obj.forget(); + } + + if (aSource.IsUTF8String()) { + obj->mImpl->InitializeSourceURL(aSource.GetAsUTF8String()); + } else { + uint8_t* buffer = nullptr; + uint32_t length = 0; + if (aSource.IsArrayBuffer()) { + GetDataFrom(aSource.GetAsArrayBuffer(), buffer, length); + } else if (aSource.IsArrayBufferView()) { + GetDataFrom(aSource.GetAsArrayBufferView(), buffer, length); + } else { + MOZ_ASSERT_UNREACHABLE("Unhandled source type!"); + return nullptr; + } + + obj->mImpl->InitializeSourceBuffer(buffer, length); + } + + return obj.forget(); +} + +void FontFace::GetFamily(nsACString& aResult) { mImpl->GetFamily(aResult); } + +void FontFace::SetFamily(const nsACString& aValue, ErrorResult& aRv) { + mImpl->SetFamily(aValue, aRv); +} + +void FontFace::GetStyle(nsACString& aResult) { mImpl->GetStyle(aResult); } + +void FontFace::SetStyle(const nsACString& aValue, ErrorResult& aRv) { + mImpl->SetStyle(aValue, aRv); +} + +void FontFace::GetWeight(nsACString& aResult) { mImpl->GetWeight(aResult); } + +void FontFace::SetWeight(const nsACString& aValue, ErrorResult& aRv) { + mImpl->SetWeight(aValue, aRv); +} + +void FontFace::GetStretch(nsACString& aResult) { mImpl->GetStretch(aResult); } + +void FontFace::SetStretch(const nsACString& aValue, ErrorResult& aRv) { + mImpl->SetStretch(aValue, aRv); +} + +void FontFace::GetUnicodeRange(nsACString& aResult) { + mImpl->GetUnicodeRange(aResult); +} + +void FontFace::SetUnicodeRange(const nsACString& aValue, ErrorResult& aRv) { + mImpl->SetUnicodeRange(aValue, aRv); +} + +void FontFace::GetVariant(nsACString& aResult) { mImpl->GetVariant(aResult); } + +void FontFace::SetVariant(const nsACString& aValue, ErrorResult& aRv) { + mImpl->SetVariant(aValue, aRv); +} + +void FontFace::GetFeatureSettings(nsACString& aResult) { + mImpl->GetFeatureSettings(aResult); +} + +void FontFace::SetFeatureSettings(const nsACString& aValue, ErrorResult& aRv) { + mImpl->SetFeatureSettings(aValue, aRv); +} + +void FontFace::GetVariationSettings(nsACString& aResult) { + mImpl->GetVariationSettings(aResult); +} + +void FontFace::SetVariationSettings(const nsACString& aValue, + ErrorResult& aRv) { + mImpl->SetVariationSettings(aValue, aRv); +} + +void FontFace::GetDisplay(nsACString& aResult) { mImpl->GetDisplay(aResult); } + +void FontFace::SetDisplay(const nsACString& aValue, ErrorResult& aRv) { + mImpl->SetDisplay(aValue, aRv); +} + +void FontFace::GetAscentOverride(nsACString& aResult) { + mImpl->GetAscentOverride(aResult); +} + +void FontFace::SetAscentOverride(const nsACString& aValue, ErrorResult& aRv) { + mImpl->SetAscentOverride(aValue, aRv); +} + +void FontFace::GetDescentOverride(nsACString& aResult) { + mImpl->GetDescentOverride(aResult); +} + +void FontFace::SetDescentOverride(const nsACString& aValue, ErrorResult& aRv) { + mImpl->SetDescentOverride(aValue, aRv); +} + +void FontFace::GetLineGapOverride(nsACString& aResult) { + mImpl->GetLineGapOverride(aResult); +} + +void FontFace::SetLineGapOverride(const nsACString& aValue, ErrorResult& aRv) { + mImpl->SetLineGapOverride(aValue, aRv); +} + +void FontFace::GetSizeAdjust(nsACString& aResult) { + mImpl->GetSizeAdjust(aResult); +} + +void FontFace::SetSizeAdjust(const nsACString& aValue, ErrorResult& aRv) { + mImpl->SetSizeAdjust(aValue, aRv); +} + +FontFaceLoadStatus FontFace::Status() { return mImpl->Status(); } + +Promise* FontFace::Load(ErrorResult& aRv) { + EnsurePromise(); + + if (!mLoaded) { + aRv.Throw(NS_ERROR_FAILURE); + return nullptr; + } + + mImpl->Load(aRv); + return mLoaded; +} + +Promise* FontFace::GetLoaded(ErrorResult& aRv) { + EnsurePromise(); + + if (!mLoaded) { + aRv.Throw(NS_ERROR_FAILURE); + return nullptr; + } + + return mLoaded; +} + +void FontFace::MaybeResolve() { + gfxFontUtils::AssertSafeThreadOrServoFontMetricsLocked(); + + if (!mLoaded) { + return; + } + + if (ServoStyleSet* ss = gfxFontUtils::CurrentServoStyleSet()) { + // See comments in Gecko_GetFontMetrics. + ss->AppendTask(PostTraversalTask::ResolveFontFaceLoadedPromise(this)); + return; + } + + mLoaded->MaybeResolve(this); +} + +void FontFace::MaybeReject(nsresult aResult) { + gfxFontUtils::AssertSafeThreadOrServoFontMetricsLocked(); + + if (ServoStyleSet* ss = gfxFontUtils::CurrentServoStyleSet()) { + // See comments in Gecko_GetFontMetrics. + ss->AppendTask( + PostTraversalTask::RejectFontFaceLoadedPromise(this, aResult)); + return; + } + + if (mLoaded) { + mLoaded->MaybeReject(aResult); + } else if (mLoadedRejection == NS_OK) { + mLoadedRejection = aResult; + } +} + +void FontFace::EnsurePromise() { + if (mLoaded || !mImpl || !mParent) { + return; + } + + // If the pref is not set, don't create the Promise (which the page wouldn't + // be able to get to anyway) as it causes the window.FontFace constructor + // to be created. + if (FontFaceSet::IsEnabled()) { + ErrorResult rv; + mLoaded = Promise::Create(mParent, rv); + + if (mImpl->Status() == FontFaceLoadStatus::Loaded) { + mLoaded->MaybeResolve(this); + } else if (mLoadedRejection != NS_OK) { + mLoaded->MaybeReject(mLoadedRejection); + } + } +} + +} // namespace dom +} // namespace mozilla |