зеркало из https://github.com/mozilla/gecko-dev.git
129 строки
4.0 KiB
C++
129 строки
4.0 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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#ifndef nsPaper_h__
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#define nsPaper_h__
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#include "mozilla/dom/ToJSValue.h"
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#include "mozilla/gfx/Point.h"
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#include "mozilla/gfx/Rect.h"
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#include "mozilla/Maybe.h"
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#include "nsIPaper.h"
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#include "nsISupportsImpl.h"
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#include "js/TypeDecls.h"
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#include "nsString.h"
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struct JSContext;
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namespace mozilla {
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// Simple struct that can be used off the main thread to hold all the info from
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// an nsPaper instance.
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struct PaperInfo {
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using MarginDouble = mozilla::gfx::MarginDouble;
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using SizeDouble = mozilla::gfx::SizeDouble;
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PaperInfo() = default;
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PaperInfo(const nsAString& aId, const nsAString& aName,
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const SizeDouble& aSize,
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const Maybe<MarginDouble>& aUnwriteableMargin)
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: mId(aId),
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mName(aName),
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mSize(aSize),
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mUnwriteableMargin(aUnwriteableMargin) {}
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nsString mId;
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nsString mName;
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SizeDouble mSize;
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// The margins may not be known by some back-ends.
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Maybe<MarginDouble> mUnwriteableMargin{Nothing()};
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};
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/**
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* Plain struct used for commonly used, hard-coded paper sizes.
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*
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* Used to construct PaperInfo at runtime by localizing the name.
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*/
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struct CommonPaperSize final {
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// The standardized PWG name, which should be used as the PaperInfo id
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nsLiteralString mPWGName;
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// The name key to localize the name of this paper size using strings in
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// printUI.ftl
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nsLiteralCString mLocalizableNameKey;
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// Size is in points, same as PaperInfo
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gfx::SizeDouble mSize;
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};
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} // namespace mozilla
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class nsPrinterBase;
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class nsPaper final : public nsIPaper {
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using Promise = mozilla::dom::Promise;
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using CommonPaperSize = mozilla::CommonPaperSize;
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS(nsPaper)
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NS_DECL_NSIPAPER
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nsPaper() = delete;
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explicit nsPaper(const mozilla::PaperInfo&);
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nsPaper(nsPrinterBase&, const mozilla::PaperInfo&);
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// This list is used for both our fallback paper sizes (used when a printer
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// does not provide a list of available paper sizes), and for localizing
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// common paper sizes to avoid querying the printer for extra information in
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// the common case, as well as to provide more uniform paper names in the
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// frontend.
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// If we need to separate these two uses, we will need to either split this
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// into two lists, or add a flag to indicate what the size is used for.
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#define mm *72.0 / 25.4
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#define in *72.0
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static constexpr CommonPaperSize kCommonPaperSizes[] = {
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CommonPaperSize{u"iso_a5"_ns, "a5"_ns, {148 mm, 210 mm}},
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CommonPaperSize{u"iso_a4"_ns, "a4"_ns, {210 mm, 297 mm}},
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CommonPaperSize{u"iso_a3"_ns, "a3"_ns, {297 mm, 420 mm}},
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CommonPaperSize{u"iso_b5"_ns, "b5"_ns, {176 mm, 250 mm}},
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CommonPaperSize{u"iso_b4"_ns, "b4"_ns, {250 mm, 353 mm}},
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CommonPaperSize{u"jis_b5"_ns, "jis-b5"_ns, {182 mm, 257 mm}},
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CommonPaperSize{u"jis_b4"_ns, "jis-b4"_ns, {257 mm, 364 mm}},
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CommonPaperSize{u"na_letter"_ns, "letter"_ns, {8.5 in, 11 in}},
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CommonPaperSize{u"na_legal"_ns, "legal"_ns, {8.5 in, 14 in}},
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CommonPaperSize{u"na_ledger"_ns, "tabloid"_ns, {11 in, 17 in}}};
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#undef mm
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#undef in
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static constexpr size_t kNumCommonPaperSizes =
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mozilla::ArrayLength(kCommonPaperSizes);
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private:
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~nsPaper();
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// null if not associated with a printer (for "Save-to-PDF" paper sizes)
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RefPtr<nsPrinterBase> mPrinter;
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RefPtr<Promise> mMarginPromise;
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const mozilla::PaperInfo mInfo;
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};
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namespace mozilla {
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// Used to allow fixed-sized arrays of PWG paper info to be ref-counted.
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class CommonPaperInfoArray
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: public Array<PaperInfo, nsPaper::kNumCommonPaperSizes> {
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CommonPaperInfoArray);
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CommonPaperInfoArray() = default;
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private:
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~CommonPaperInfoArray() = default;
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};
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} // namespace mozilla
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#endif /* nsPaper_h__ */
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