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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 "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->EventTargetFor(mozilla::TaskCategory::Other);
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;
}
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