diff options
Diffstat (limited to 'gfx/src/nsThebesFontEnumerator.cpp')
| -rw-r--r-- | gfx/src/nsThebesFontEnumerator.cpp | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/gfx/src/nsThebesFontEnumerator.cpp b/gfx/src/nsThebesFontEnumerator.cpp new file mode 100644 index 0000000000..baf8c50142 --- /dev/null +++ b/gfx/src/nsThebesFontEnumerator.cpp @@ -0,0 +1,236 @@ +/* -*- 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 "nsThebesFontEnumerator.h" +#include <stdint.h> // for uint32_t +#include "gfxPlatform.h" // for gfxPlatform +#include "mozilla/Assertions.h" // for MOZ_ASSERT_HELPER2 +#include "mozilla/UniquePtr.h" +#include "mozilla/dom/Promise.h" // for mozilla::dom::Promise +#include "nsCOMPtr.h" // for nsCOMPtr +#include "nsDebug.h" // for NS_ENSURE_ARG_POINTER +#include "nsError.h" // for NS_OK, NS_FAILED, nsresult +#include "nsAtom.h" // for nsAtom, NS_Atomize +#include "nsID.h" +#include "nsString.h" // for nsAutoCString, nsAutoString, etc +#include "nsTArray.h" // for nsTArray, nsTArray_Impl, etc +#include "nscore.h" // for char16_t, NS_IMETHODIMP + +using mozilla::MakeUnique; +using mozilla::Runnable; +using mozilla::UniquePtr; + +NS_IMPL_ISUPPORTS(nsThebesFontEnumerator, nsIFontEnumerator) + +nsThebesFontEnumerator::nsThebesFontEnumerator() = default; + +NS_IMETHODIMP +nsThebesFontEnumerator::EnumerateAllFonts(nsTArray<nsString>& aResult) { + return EnumerateFonts(nullptr, nullptr, aResult); +} + +NS_IMETHODIMP +nsThebesFontEnumerator::EnumerateFonts(const char* aLangGroup, + const char* aGeneric, + nsTArray<nsString>& aResult) { + nsAutoCString generic; + if (aGeneric) + generic.Assign(aGeneric); + else + generic.SetIsVoid(true); + + RefPtr<nsAtom> langGroupAtom; + if (aLangGroup) { + nsAutoCString lowered; + lowered.Assign(aLangGroup); + ToLowerCase(lowered); + langGroupAtom = NS_Atomize(lowered); + } + + return gfxPlatform::GetPlatform()->GetFontList(langGroupAtom, generic, + aResult); +} + +struct EnumerateFontsPromise final { + explicit EnumerateFontsPromise(mozilla::dom::Promise* aPromise) + : mPromise(aPromise) { + MOZ_ASSERT(aPromise); + MOZ_ASSERT(NS_IsMainThread()); + } + + RefPtr<mozilla::dom::Promise> mPromise; +}; + +class EnumerateFontsResult final : public Runnable { + public: + EnumerateFontsResult(nsresult aRv, + UniquePtr<EnumerateFontsPromise> aEnumerateFontsPromise, + nsTArray<nsString> aFontList) + : Runnable("EnumerateFontsResult"), + mRv(aRv), + mEnumerateFontsPromise(std::move(aEnumerateFontsPromise)), + mFontList(std::move(aFontList)), + mWorkerThread(do_GetCurrentThread()) { + MOZ_ASSERT(!NS_IsMainThread()); + } + + NS_IMETHOD Run() override { + MOZ_ASSERT(NS_IsMainThread()); + + if (NS_FAILED(mRv)) { + mEnumerateFontsPromise->mPromise->MaybeReject(mRv); + } else { + mEnumerateFontsPromise->mPromise->MaybeResolve(mFontList); + } + + mWorkerThread->Shutdown(); + + return NS_OK; + } + + private: + nsresult mRv; + UniquePtr<EnumerateFontsPromise> mEnumerateFontsPromise; + nsTArray<nsString> mFontList; + nsCOMPtr<nsIThread> mWorkerThread; +}; + +class EnumerateFontsTask final : public Runnable { + public: + EnumerateFontsTask(nsAtom* aLangGroupAtom, const nsAutoCString& aGeneric, + UniquePtr<EnumerateFontsPromise> aEnumerateFontsPromise, + nsIEventTarget* aMainThreadTarget) + : Runnable("EnumerateFontsTask"), + mLangGroupAtom(aLangGroupAtom), + mGeneric(aGeneric), + mEnumerateFontsPromise(std::move(aEnumerateFontsPromise)), + mMainThreadTarget(aMainThreadTarget) { + MOZ_ASSERT(NS_IsMainThread()); + } + + NS_IMETHOD Run() override { + MOZ_ASSERT(!NS_IsMainThread()); + + nsTArray<nsString> fontList; + + nsresult rv = gfxPlatform::GetPlatform()->GetFontList(mLangGroupAtom, + mGeneric, fontList); + nsCOMPtr<nsIRunnable> runnable = new EnumerateFontsResult( + rv, std::move(mEnumerateFontsPromise), std::move(fontList)); + mMainThreadTarget->Dispatch(runnable.forget()); + + return NS_OK; + } + + private: + RefPtr<nsAtom> mLangGroupAtom; + nsAutoCStringN<16> mGeneric; + UniquePtr<EnumerateFontsPromise> mEnumerateFontsPromise; + RefPtr<nsIEventTarget> mMainThreadTarget; +}; + +NS_IMETHODIMP +nsThebesFontEnumerator::EnumerateAllFontsAsync( + JSContext* aCx, JS::MutableHandle<JS::Value> aRval) { + return EnumerateFontsAsync(nullptr, nullptr, aCx, aRval); +} + +NS_IMETHODIMP +nsThebesFontEnumerator::EnumerateFontsAsync( + const char* aLangGroup, const char* aGeneric, JSContext* aCx, + JS::MutableHandle<JS::Value> aRval) { + MOZ_ASSERT(NS_IsMainThread()); + + nsCOMPtr<nsIGlobalObject> global = xpc::CurrentNativeGlobal(aCx); + NS_ENSURE_TRUE(global, NS_ERROR_UNEXPECTED); + + mozilla::ErrorResult errv; + RefPtr<mozilla::dom::Promise> promise = + mozilla::dom::Promise::Create(global, errv); + if (errv.Failed()) { + return errv.StealNSResult(); + } + + auto enumerateFontsPromise = MakeUnique<EnumerateFontsPromise>(promise); + + nsCOMPtr<nsIThread> thread; + nsresult rv = NS_NewNamedThread("FontEnumThread", getter_AddRefs(thread)); + NS_ENSURE_SUCCESS(rv, rv); + + RefPtr<nsAtom> langGroupAtom; + if (aLangGroup) { + nsAutoCStringN<16> lowered; + lowered.Assign(aLangGroup); + ToLowerCase(lowered); + langGroupAtom = NS_Atomize(lowered); + } + + nsAutoCString generic; + if (aGeneric) { + generic.Assign(aGeneric); + } else { + generic.SetIsVoid(true); + } + + nsCOMPtr<nsIEventTarget> target = global->SerialEventTarget(); + nsCOMPtr<nsIRunnable> runnable = new EnumerateFontsTask( + langGroupAtom, generic, std::move(enumerateFontsPromise), target); + thread->Dispatch(runnable.forget(), NS_DISPATCH_NORMAL); + + if (!ToJSValue(aCx, promise, aRval)) { + return NS_ERROR_FAILURE; + } + + return NS_OK; +} + +NS_IMETHODIMP +nsThebesFontEnumerator::HaveFontFor(const char* aLangGroup, bool* aResult) { + NS_ENSURE_ARG_POINTER(aResult); + + *aResult = true; + return NS_OK; +} + +NS_IMETHODIMP +nsThebesFontEnumerator::GetDefaultFont(const char* aLangGroup, + const char* aGeneric, + char16_t** aResult) { + if (NS_WARN_IF(!aResult) || NS_WARN_IF(!aLangGroup) || + NS_WARN_IF(!aGeneric)) { + return NS_ERROR_INVALID_ARG; + } + + *aResult = nullptr; + nsAutoCString defaultFontName(gfxPlatform::GetPlatform()->GetDefaultFontName( + nsDependentCString(aLangGroup), nsDependentCString(aGeneric))); + if (!defaultFontName.IsEmpty()) { + *aResult = UTF8ToNewUnicode(defaultFontName); + } + return NS_OK; +} + +NS_IMETHODIMP +nsThebesFontEnumerator::GetStandardFamilyName(const char16_t* aName, + char16_t** aResult) { + NS_ENSURE_ARG_POINTER(aResult); + NS_ENSURE_ARG_POINTER(aName); + + nsAutoString name(aName); + if (name.IsEmpty()) { + *aResult = nullptr; + return NS_OK; + } + + nsAutoCString family; + gfxPlatform::GetPlatform()->GetStandardFamilyName( + NS_ConvertUTF16toUTF8(aName), family); + if (family.IsEmpty()) { + *aResult = nullptr; + return NS_OK; + } + *aResult = UTF8ToNewUnicode(family); + return NS_OK; +} |