зеркало из https://github.com/mozilla/gecko-dev.git
78 строки
2.4 KiB
C++
78 строки
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 MOZILLA_GFX_PRINTTARGETEMF_H
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#define MOZILLA_GFX_PRINTTARGETEMF_H
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#include "PrintTargetSkPDF.h"
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#include "mozilla/ipc/Shmem.h"
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/* include windows.h for the HDC definitions that we need. */
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#include <windows.h>
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namespace mozilla {
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namespace widget {
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class PDFiumProcessParent;
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}
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}
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namespace mozilla {
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namespace gfx {
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/**
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* A new subclass of PrintTarget.
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* 1. It uses PrintTargetSkPDF to generate one PDF file for one page.
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* 2. It then passes the FileDescriptor of that generated PDF file to the
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* PDFium process for EMF conversion.
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* 3. After getting the converted EMF contents from the PDFium process, it then
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* draws it onto the printer DC to finish one page printing task.
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*/
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class PrintTargetEMF final : public mozilla::gfx::PrintTarget
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{
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public:
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typedef gfx::IntSize IntSize;
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typedef mozilla::widget::PDFiumProcessParent PDFiumProcessParent;
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static already_AddRefed<PrintTargetEMF>
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CreateOrNull(HDC aDC, const IntSize& aSizeInPoints);
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nsresult BeginPrinting(const nsAString& aTitle,
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const nsAString& aPrintToFileName,
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int32_t aStartPage,
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int32_t aEndPage) final;
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nsresult EndPrinting() final;
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nsresult AbortPrinting() final;
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nsresult BeginPage() final;
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nsresult EndPage() final;
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already_AddRefed<DrawTarget>
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MakeDrawTarget(const IntSize& aSize,
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DrawEventRecorder* aRecorder = nullptr) final;
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already_AddRefed<DrawTarget>
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GetReferenceDrawTarget() final;
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void ConvertToEMFDone(const nsresult& aResult, mozilla::ipc::Shmem&& aEMF);
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bool IsSyncPagePrinting() const final { return false; }
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void ChannelIsBroken() { mChannelBroken = true; }
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private:
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PrintTargetEMF(HDC aDC, const IntSize& aSize);
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~PrintTargetEMF() override;
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nsString mTitle;
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RefPtr<PrintTargetSkPDF> mTargetForCurrentPage;
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nsCOMPtr<nsIFile> mPDFFileForOnePage;
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RefPtr<PrintTargetSkPDF> mRefTarget;
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PDFiumProcessParent* mPDFiumProcess;
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HDC mPrinterDC;
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bool mChannelBroken;
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};
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} // namespace gfx
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} // namespace mozilla
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#endif /* MOZILLA_GFX_PRINTTARGETEMF_H */
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