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6635212e1a
Since we no longer are using the PaperList or CreateDefaultSettings methods on nsPrinterBase, and we can remove them from nsPrinterBase. This should dramatically improve latency when the remote printer is not available, or when the print server is slower. In the best-case scenario it may increase the latency to displaying the print preview somewhat. Differential Revision: https://phabricator.services.mozilla.com/D94482
113 lines
3.7 KiB
C++
113 lines
3.7 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 nsPrinterBase_h__
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#define nsPrinterBase_h__
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#include "mozilla/gfx/Rect.h"
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#include "nsIPrinter.h"
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#include "nsTArray.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsISupportsImpl.h"
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#include "nsPrintSettingsImpl.h"
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#include "mozilla/EnumeratedArray.h"
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#include "mozilla/Result.h"
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namespace mozilla {
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struct PaperInfo;
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namespace dom {
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class Promise;
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}
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} // namespace mozilla
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class nsPrinterBase : public nsIPrinter {
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public:
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using Promise = mozilla::dom::Promise;
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using MarginDouble = mozilla::gfx::MarginDouble;
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using PrintSettingsInitializer = mozilla::PrintSettingsInitializer;
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NS_IMETHOD GetSupportsDuplex(JSContext*, Promise**) final;
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NS_IMETHOD GetSupportsColor(JSContext*, Promise**) final;
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NS_IMETHOD GetSupportsMonochrome(JSContext*, Promise**) final;
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NS_IMETHOD GetSupportsCollation(JSContext*, Promise**) final;
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NS_IMETHOD GetPrinterInfo(JSContext*, Promise**) final;
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS(nsPrinterBase)
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// We require the paper info array
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nsPrinterBase() = delete;
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// No copy or move, we're an identity.
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nsPrinterBase(const nsPrinterBase&) = delete;
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nsPrinterBase(nsPrinterBase&&) = delete;
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void QueryMarginsForPaper(Promise&, const nsString& aPaperId);
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/**
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* Caches the argument by copying it into mPrintSettingsInitializer.
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* If mPrintSettingsInitializer is already populated this is a no-op.
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*/
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void CachePrintSettingsInitializer(
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const PrintSettingsInitializer& aInitializer);
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// Data to pass through to create the nsPrinterInfo
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struct PrinterInfo {
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nsTArray<mozilla::PaperInfo> mPaperList;
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PrintSettingsInitializer mDefaultSettings;
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};
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private:
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enum class AsyncAttribute {
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// If you change this list you must update attributeKeys in
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// nsPrinterBase::AsyncPromiseAttributeGetter.
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SupportsDuplex = 0,
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SupportsColor,
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SupportsMonochrome,
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SupportsCollation,
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PrinterInfo,
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// Just a guard.
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Last,
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};
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template <typename Result, typename... Args>
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using BackgroundTask = Result (nsPrinterBase::*)(Args...) const;
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// Resolves an async attribute via a background task.
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template <typename T, typename... Args>
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nsresult AsyncPromiseAttributeGetter(JSContext*, Promise**, AsyncAttribute,
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BackgroundTask<T, Args...>,
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Args... aArgs);
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protected:
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nsPrinterBase(const mozilla::CommonPaperInfoArray* aPaperInfoArray);
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virtual ~nsPrinterBase();
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// Implementation-specific methods. These must not make assumptions about
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// which thread they run on.
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virtual bool SupportsDuplex() const = 0;
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virtual bool SupportsColor() const = 0;
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virtual bool SupportsMonochrome() const = 0;
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virtual bool SupportsCollation() const = 0;
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virtual MarginDouble GetMarginsForPaper(nsString aPaperId) const = 0;
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virtual PrinterInfo CreatePrinterInfo() const = 0;
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// Searches our built-in list of commonly used PWG paper sizes for a matching,
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// localized PaperInfo. Returns null if there is no matching size.
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const mozilla::PaperInfo* FindCommonPaperSize(
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const mozilla::gfx::SizeDouble& aSize) const;
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private:
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mozilla::EnumeratedArray<AsyncAttribute, AsyncAttribute::Last,
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RefPtr<Promise>>
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mAsyncAttributePromises;
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// List of built-in, commonly used paper sizes.
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const RefPtr<const mozilla::CommonPaperInfoArray> mCommonPaperInfo;
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};
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#endif
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