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/* -*- Mode: C++; tab-width: 4; 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 "nsPrinterBase.h"
#include "nsPaperMargin.h"
#include <utility>
#include "nsPaper.h"
#include "nsIPrintSettings.h"
#include "PrintBackgroundTask.h"
#include "mozilla/dom/Promise.h"
using namespace mozilla;
using mozilla::dom::Promise;
using mozilla::gfx::MarginDouble;
// The maximum error when considering a paper size equal, in points.
// There is some variance in the actual sizes returned by printer drivers and
// print servers for paper sizes. This is a best-guess based on initial
// telemetry which should catch most near-miss dimensions. This should let us
// get consistent paper size names even when the size isn't quite exactly the
// correct size.
static constexpr double kPaperSizePointsEpsilon = 4.0;
// Basic implementation of nsIPrinterInfo
class nsPrinterInfo : public nsIPrinterInfo {
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_CLASS(nsPrinterInfo)
NS_DECL_NSIPRINTERINFO
nsPrinterInfo() = delete;
nsPrinterInfo(nsPrinterBase& aPrinter,
const nsPrinterBase::PrinterInfo& aPrinterInfo)
: mDefaultSettings(
CreatePlatformPrintSettings(aPrinterInfo.mDefaultSettings)) {
mPaperList.SetCapacity(aPrinterInfo.mPaperList.Length());
for (const PaperInfo& info : aPrinterInfo.mPaperList) {
mPaperList.AppendElement(MakeRefPtr<nsPaper>(aPrinter, info));
}
}
private:
virtual ~nsPrinterInfo() = default;
nsTArray<RefPtr<nsIPaper>> mPaperList;
RefPtr<nsIPrintSettings> mDefaultSettings;
};
NS_IMETHODIMP
nsPrinterInfo::GetPaperList(nsTArray<RefPtr<nsIPaper>>& aPaperList) {
aPaperList = mPaperList.Clone();
return NS_OK;
}
NS_IMETHODIMP
nsPrinterInfo::GetDefaultSettings(nsIPrintSettings** aDefaultSettings) {
NS_ENSURE_ARG_POINTER(aDefaultSettings);
MOZ_ASSERT(mDefaultSettings);
RefPtr<nsIPrintSettings> settings = mDefaultSettings;
settings.forget(aDefaultSettings);
return NS_OK;
}
NS_IMPL_CYCLE_COLLECTION(nsPrinterInfo, mPaperList, mDefaultSettings)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPrinterInfo)
NS_INTERFACE_MAP_ENTRY(nsIPrinterInfo)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIPrinterInfo)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPrinterInfo)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsPrinterInfo)
template <typename Index, Index Size, typename Value>
inline void ImplCycleCollectionTraverse(
nsCycleCollectionTraversalCallback& aCallback,
EnumeratedArray<Index, Size, Value>& aArray, const char* aName,
uint32_t aFlags = 0) {
aFlags |= CycleCollectionEdgeNameArrayFlag;
for (Value& element : aArray) {
ImplCycleCollectionTraverse(aCallback, element, aName, aFlags);
}
}
template <typename Index, Index Size, typename Value>
inline void ImplCycleCollectionUnlink(
EnumeratedArray<Index, Size, Value>& aArray) {
for (Value& element : aArray) {
ImplCycleCollectionUnlink(element);
}
}
namespace mozilla {
template <>
void ResolveOrReject(Promise& aPromise, nsPrinterBase&,
const MarginDouble& aResult) {
auto margin = MakeRefPtr<nsPaperMargin>(aResult);
aPromise.MaybeResolve(margin);
}
template <>
void ResolveOrReject(Promise& aPromise, nsPrinterBase& aPrinter,
const nsTArray<PaperInfo>& aResult) {
nsTArray<RefPtr<nsPaper>> result;
result.SetCapacity(aResult.Length());
for (const PaperInfo& info : aResult) {
result.AppendElement(MakeRefPtr<nsPaper>(aPrinter, info));
}
aPromise.MaybeResolve(result);
}
template <>
void ResolveOrReject(Promise& aPromise, nsPrinterBase& aPrinter,
const PrintSettingsInitializer& aResult) {
aPromise.MaybeResolve(
RefPtr<nsIPrintSettings>(CreatePlatformPrintSettings(aResult)));
}
template <>
void ResolveOrReject(Promise& aPromise, nsPrinterBase& aPrinter,
const nsPrinterBase::PrinterInfo& aResult) {
aPromise.MaybeResolve(MakeRefPtr<nsPrinterInfo>(aPrinter, aResult));
}
} // namespace mozilla
template <typename T, typename... Args>
nsresult nsPrinterBase::AsyncPromiseAttributeGetter(
JSContext* aCx, Promise** aResultPromise, AsyncAttribute aAttribute,
BackgroundTask<T, Args...> aBackgroundTask, Args... aArgs) {
MOZ_ASSERT(NS_IsMainThread());
static constexpr EnumeratedArray<AsyncAttribute, AsyncAttribute::Last,
nsLiteralCString>
attributeKeys{"SupportsDuplex"_ns, "SupportsColor"_ns,
"SupportsMonochrome"_ns, "SupportsCollation"_ns,
"PrinterInfo"_ns};
return mozilla::AsyncPromiseAttributeGetter(
*this, mAsyncAttributePromises[aAttribute], aCx, aResultPromise,
attributeKeys[aAttribute], aBackgroundTask, std::forward<Args>(aArgs)...);
}
NS_IMETHODIMP nsPrinterBase::GetSupportsDuplex(JSContext* aCx,
Promise** aResultPromise) {
return AsyncPromiseAttributeGetter(aCx, aResultPromise,
AsyncAttribute::SupportsDuplex,
&nsPrinterBase::SupportsDuplex);
}
NS_IMETHODIMP nsPrinterBase::GetSupportsColor(JSContext* aCx,
Promise** aResultPromise) {
return AsyncPromiseAttributeGetter(aCx, aResultPromise,
AsyncAttribute::SupportsColor,
&nsPrinterBase::SupportsColor);
}
NS_IMETHODIMP nsPrinterBase::GetSupportsMonochrome(JSContext* aCx,
Promise** aResultPromise) {
return AsyncPromiseAttributeGetter(aCx, aResultPromise,
AsyncAttribute::SupportsMonochrome,
&nsPrinterBase::SupportsMonochrome);
}
NS_IMETHODIMP nsPrinterBase::GetSupportsCollation(JSContext* aCx,
Promise** aResultPromise) {
return AsyncPromiseAttributeGetter(aCx, aResultPromise,
AsyncAttribute::SupportsCollation,
&nsPrinterBase::SupportsCollation);
}
NS_IMETHODIMP nsPrinterBase::GetPrinterInfo(JSContext* aCx,
Promise** aResultPromise) {
return AsyncPromiseAttributeGetter(aCx, aResultPromise,
AsyncAttribute::PrinterInfo,
&nsPrinterBase::CreatePrinterInfo);
}
void nsPrinterBase::QueryMarginsForPaper(Promise& aPromise,
const nsString& aPaperId) {
return SpawnPrintBackgroundTask(*this, aPromise, "MarginsForPaper"_ns,
&nsPrinterBase::GetMarginsForPaper, aPaperId);
}
NS_IMPL_CYCLE_COLLECTION(nsPrinterBase, mAsyncAttributePromises)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPrinterBase)
NS_INTERFACE_MAP_ENTRY(nsIPrinter)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIPrinter)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPrinterBase)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsPrinterBase)
nsPrinterBase::nsPrinterBase(const CommonPaperInfoArray* aPaperInfoArray)
: mCommonPaperInfo(aPaperInfoArray) {
MOZ_DIAGNOSTIC_ASSERT(aPaperInfoArray, "Localized paper info was null");
}
nsPrinterBase::~nsPrinterBase() = default;
const PaperInfo* nsPrinterBase::FindCommonPaperSize(
const gfx::SizeDouble& aSize) const {
for (const PaperInfo& paper : *mCommonPaperInfo) {
if (std::abs(paper.mSize.width - aSize.width) <= kPaperSizePointsEpsilon &&
std::abs(paper.mSize.height - aSize.height) <=
kPaperSizePointsEpsilon) {
return &paper;
}
}
return nullptr;
}