gecko-dev/widget/nsPrinterListBase.cpp

152 строки
5.5 KiB
C++

/* -*- 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 "nsPrinterListBase.h"
#include "PrintBackgroundTask.h"
#include "mozilla/ErrorResult.h"
#include "xpcpublic.h"
using mozilla::ErrorResult;
using PrinterInfo = nsPrinterListBase::PrinterInfo;
nsPrinterListBase::nsPrinterListBase() = default;
nsPrinterListBase::~nsPrinterListBase() = default;
NS_IMPL_CYCLE_COLLECTION(nsPrinterListBase, mPrintersPromise)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPrinterListBase)
NS_INTERFACE_MAP_ENTRY(nsIPrinterList)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIPrinterList)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPrinterListBase)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsPrinterListBase)
namespace mozilla {
template <>
void ResolveOrReject(dom::Promise& aPromise, nsPrinterListBase& aList,
const nsTArray<PrinterInfo>& aInfo) {
nsTArray<RefPtr<nsIPrinter>> printers;
printers.SetCapacity(aInfo.Length());
for (auto& info : aInfo) {
printers.AppendElement(aList.CreatePrinter(info));
}
aPromise.MaybeResolve(printers);
}
template <>
void ResolveOrReject(dom::Promise& aPromise, nsPrinterListBase& aList,
const Maybe<PrinterInfo>& aInfo) {
if (aInfo) {
aPromise.MaybeResolve(aList.CreatePrinter(aInfo.value()));
} else {
aPromise.MaybeRejectWithNotFoundError("Printer not found");
}
}
} // namespace mozilla
NS_IMETHODIMP nsPrinterListBase::GetPrinters(JSContext* aCx,
Promise** aResult) {
return mozilla::AsyncPromiseAttributeGetter(*this, mPrintersPromise, aCx,
aResult, "Printers"_ns,
&nsPrinterListBase::Printers);
}
NS_IMETHODIMP nsPrinterListBase::GetNamedPrinter(const nsAString& aPrinterName,
JSContext* aCx,
Promise** aResult) {
return PrintBackgroundTaskPromise(*this, aCx, aResult, "NamedPrinter"_ns,
&nsPrinterListBase::NamedPrinter,
nsString{aPrinterName});
}
NS_IMETHODIMP nsPrinterListBase::GetNamedOrDefaultPrinter(
const nsAString& aPrinterName, JSContext* aCx, Promise** aResult) {
return PrintBackgroundTaskPromise(
*this, aCx, aResult, "NamedOrDefaultPrinter"_ns,
&nsPrinterListBase::NamedOrDefaultPrinter, nsString{aPrinterName});
}
Maybe<PrinterInfo> nsPrinterListBase::NamedOrDefaultPrinter(
nsString aName) const {
if (Maybe<PrinterInfo> value = NamedPrinter(std::move(aName))) {
return value;
}
// Since the name had to be passed by-value, we can re-use it to fetch the
// default printer name, potentially avoiding an extra string allocation.
if (NS_SUCCEEDED(SystemDefaultPrinterName(aName))) {
return NamedPrinter(std::move(aName));
}
return Nothing();
}
NS_IMETHODIMP nsPrinterListBase::GetFallbackPaperList(JSContext* aCx,
Promise** aResult) {
ErrorResult rv;
RefPtr<Promise> promise = Promise::Create(xpc::CurrentNativeGlobal(aCx), rv);
if (MOZ_UNLIKELY(rv.Failed())) {
*aResult = nullptr;
return rv.StealNSResult();
}
promise->MaybeResolve(FallbackPaperList());
promise.forget(aResult);
return NS_OK;
}
nsTArray<RefPtr<nsPaper>> nsPrinterListBase::FallbackPaperList() const {
#define mm *72.0 / 25.4
#define in *72.0
#ifdef MOZ_WIDGET_GTK
// For GTK we want to use the PWG standardized names.
static const mozilla::PaperInfo kPapers[] = {
{u"iso_a5"_ns, {148 mm, 210 mm}, Some(MarginDouble{})},
{u"iso_a4"_ns, {210 mm, 297 mm}, Some(MarginDouble{})},
{u"iso_a3"_ns, {297 mm, 420 mm}, Some(MarginDouble{})},
{u"iso_b5"_ns, {176 mm, 250 mm}, Some(MarginDouble{})},
{u"iso_b4"_ns, {250 mm, 353 mm}, Some(MarginDouble{})},
{u"jis_b5"_ns, {182 mm, 257 mm}, Some(MarginDouble{})},
{u"jis_b4"_ns, {257 mm, 364 mm}, Some(MarginDouble{})},
{u"na_letter"_ns, {8.5 in, 11 in}, Some(MarginDouble{})},
{u"na_legal"_ns, {8.5 in, 14 in}, Some(MarginDouble{})},
{u"na_ledger"_ns, {11 in, 17 in}, Some(MarginDouble{})},
};
#else
// Otherwise we want to use the localized name versions.
static const mozilla::PaperInfo kPapers[] = {
{u"A5"_ns, {148 mm, 210 mm}, Some(MarginDouble{})},
{u"A4"_ns, {210 mm, 297 mm}, Some(MarginDouble{})},
{u"A3"_ns, {297 mm, 420 mm}, Some(MarginDouble{})},
{u"B5"_ns, {176 mm, 250 mm}, Some(MarginDouble{})},
{u"B4"_ns, {250 mm, 353 mm}, Some(MarginDouble{})},
{u"JIS-B5"_ns, {182 mm, 257 mm}, Some(MarginDouble{})},
{u"JIS-B4"_ns, {257 mm, 364 mm}, Some(MarginDouble{})},
{u"US Letter"_ns, {8.5 in, 11 in}, Some(MarginDouble{})},
{u"US Legal"_ns, {8.5 in, 14 in}, Some(MarginDouble{})},
{u"Tabloid"_ns, {11 in, 17 in}, Some(MarginDouble{})},
};
#endif // MOZ_WIDGET_GTK
#undef mm
#undef in
// TODO:
// Replace the en-US strings above with lowercased, "US"-stripped versions
// as found in printUI.ftl, and call Fluent to get localized paper names.
// Consider whether any more sizes should be included (A0-A2?).
nsTArray<RefPtr<nsPaper>> result;
result.SetCapacity(mozilla::ArrayLength(kPapers));
for (const auto& info : kPapers) {
result.AppendElement(MakeRefPtr<nsPaper>(info));
}
return result;
}