mirror of
https://github.com/mozilla/gecko-dev.git
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87 lines
3.0 KiB
C++
87 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsPrinterListBase.h"
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#include "PrintBackgroundTask.h"
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#include "mozilla/ErrorResult.h"
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#include "xpcpublic.h"
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using mozilla::ErrorResult;
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using PrinterInfo = nsPrinterListBase::PrinterInfo;
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nsPrinterListBase::nsPrinterListBase() = default;
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nsPrinterListBase::~nsPrinterListBase() = default;
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NS_IMPL_CYCLE_COLLECTION(nsPrinterListBase, mPrintersPromise)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPrinterListBase)
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NS_INTERFACE_MAP_ENTRY(nsIPrinterList)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIPrinterList)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPrinterListBase)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsPrinterListBase)
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namespace mozilla {
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template <>
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void ResolveOrReject(dom::Promise& aPromise, nsPrinterListBase& aList,
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const nsTArray<PrinterInfo>& aInfo) {
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nsTArray<RefPtr<nsIPrinter>> printers;
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printers.SetCapacity(aInfo.Length());
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for (auto& info : aInfo) {
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printers.AppendElement(aList.CreatePrinter(info));
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}
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aPromise.MaybeResolve(printers);
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}
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template <>
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void ResolveOrReject(dom::Promise& aPromise, nsPrinterListBase& aList,
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const Maybe<PrinterInfo>& aInfo) {
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if (aInfo) {
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aPromise.MaybeResolve(aList.CreatePrinter(aInfo.value()));
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} else {
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aPromise.MaybeRejectWithNotFoundError("Printer not found");
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}
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}
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} // namespace mozilla
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NS_IMETHODIMP nsPrinterListBase::GetPrinters(JSContext* aCx,
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Promise** aResult) {
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return mozilla::AsyncPromiseAttributeGetter(
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*this, mPrintersPromise, aCx, aResult, &nsPrinterListBase::Printers);
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}
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NS_IMETHODIMP nsPrinterListBase::GetNamedPrinter(const nsAString& aPrinterName,
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JSContext* aCx,
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Promise** aResult) {
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return PrintBackgroundTaskPromise(*this, aCx, aResult,
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&nsPrinterListBase::NamedPrinter,
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nsString{aPrinterName});
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}
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NS_IMETHODIMP nsPrinterListBase::GetNamedOrDefaultPrinter(
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const nsAString& aPrinterName, JSContext* aCx, Promise** aResult) {
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return PrintBackgroundTaskPromise(*this, aCx, aResult,
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&nsPrinterListBase::NamedOrDefaultPrinter,
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nsString{aPrinterName});
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}
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Maybe<PrinterInfo> nsPrinterListBase::NamedOrDefaultPrinter(
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nsString aName) const {
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if (Maybe<PrinterInfo> value = NamedPrinter(std::move(aName))) {
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return value;
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}
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// Since the name had to be passed by-value, we can re-use it to fetch the
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// default printer name, potentially avoiding an extra string allocation.
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if (NS_SUCCEEDED(SystemDefaultPrinterName(aName))) {
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return NamedPrinter(std::move(aName));
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}
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return Nothing();
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}
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