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-rw-r--r--widget/nsPrinterBase.cpp212
1 files changed, 212 insertions, 0 deletions
diff --git a/widget/nsPrinterBase.cpp b/widget/nsPrinterBase.cpp
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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;
+}