widget/nsDeviceContextSpecProxy.cpp
author Dorel Luca <dluca@mozilla.com>
Mon, 04 Dec 2017 18:01:09 +0200
changeset 394844 58fec9a96e269a57cc6f84bfe3a6dc6800acd955
parent 390127 ed7bb5988eb13891a17cc8e2e5be42499cd1c4e5
child 394941 87f5eb24ef4b510fa73db427e80bc011f6160bde
permissions -rw-r--r--
Backed out 7 changesets (bug 1377007) for failing build bustage on Linux pgo and faling Cpp's jsapi-tests r=backout on a CLOSED TREE Backed out changeset 9428a4ed7dec (bug 1377007) Backed out changeset 4407b43a8aff (bug 1377007) Backed out changeset 65a37a7f78a5 (bug 1377007) Backed out changeset 276fe6d9b716 (bug 1377007) Backed out changeset 1de46e60ffba (bug 1377007) Backed out changeset 893e303e17ec (bug 1377007) Backed out changeset 081a241e25d4 (bug 1377007)

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "nsDeviceContextSpecProxy.h"

#include "gfxASurface.h"
#include "gfxPlatform.h"
#include "mozilla/gfx/DrawEventRecorder.h"
#include "mozilla/gfx/PrintTargetThebes.h"
#include "mozilla/layout/RemotePrintJobChild.h"
#include "mozilla/RefPtr.h"
#include "mozilla/Unused.h"
#include "nsComponentManagerUtils.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsDirectoryServiceUtils.h"
#include "nsIPrintSession.h"
#include "nsIPrintSettings.h"
#include "nsIUUIDGenerator.h"

using mozilla::Unused;

using namespace mozilla;
using namespace mozilla::gfx;

NS_IMPL_ISUPPORTS(nsDeviceContextSpecProxy, nsIDeviceContextSpec)

NS_IMETHODIMP
nsDeviceContextSpecProxy::Init(nsIWidget* aWidget,
                               nsIPrintSettings* aPrintSettings,
                               bool aIsPrintPreview)
{
  nsresult rv;
  mRealDeviceContextSpec =
    do_CreateInstance("@mozilla.org/gfx/devicecontextspec;1", &rv);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  mRealDeviceContextSpec->Init(nullptr, aPrintSettings, aIsPrintPreview);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    mRealDeviceContextSpec = nullptr;
    return rv;
  }

  mPrintSettings = aPrintSettings;

  if (aIsPrintPreview) {
    return NS_OK;
  }

  // nsIPrintSettings only has a weak reference to nsIPrintSession, so we hold
  // it to make sure it's available for the lifetime of the print.
  rv = mPrintSettings->GetPrintSession(getter_AddRefs(mPrintSession));
  if (NS_FAILED(rv) || !mPrintSession) {
    NS_WARNING("We can't print via the parent without an nsIPrintSession.");
    return NS_ERROR_FAILURE;
  }

  rv = mPrintSession->GetRemotePrintJob(getter_AddRefs(mRemotePrintJob));
  if (NS_FAILED(rv) || !mRemotePrintJob) {
    NS_WARNING("We can't print via the parent without a RemotePrintJobChild.");
    return NS_ERROR_FAILURE;
  }

  rv = NS_GetSpecialDirectory(NS_APP_CONTENT_PROCESS_TEMP_DIR,
                              getter_AddRefs(mRecordingDir));
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  mUuidGenerator = do_GetService("@mozilla.org/uuid-generator;1", &rv);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  return NS_OK;
}

already_AddRefed<PrintTarget>
nsDeviceContextSpecProxy::MakePrintTarget()
{
  MOZ_ASSERT(mRealDeviceContextSpec);

  double width, height;
  nsresult rv = mPrintSettings->GetEffectivePageSize(&width, &height);
  if (NS_WARN_IF(NS_FAILED(rv)) || width <= 0 || height <= 0) {
    return nullptr;
  }

  // convert twips to points
  width /= TWIPS_PER_POINT_FLOAT;
  height /= TWIPS_PER_POINT_FLOAT;

  RefPtr<gfxASurface> surface = gfxPlatform::GetPlatform()->
    CreateOffscreenSurface(mozilla::gfx::IntSize::Truncate(width, height),
                           mozilla::gfx::SurfaceFormat::A8R8G8B8_UINT32);
  if (!surface) {
    return nullptr;
  }

  // The type of PrintTarget that we return here shouldn't really matter since
  // our implementation of GetDrawEventRecorder returns an object, which means
  // the DrawTarget returned by the PrintTarget will be a DrawTargetWrapAndRecord.
  // The recording will be serialized and sent over to the parent process where
  // PrintTranslator::TranslateRecording will call MakePrintTarget (indirectly
  // via PrintTranslator::CreateDrawTarget) on whatever type of
  // nsIDeviceContextSpecProxy is created for the platform that we are running
  // on.  It is that DrawTarget that the recording will be replayed on to
  // print.
  // XXX(jwatt): The above isn't quite true.  We do want to use a
  // PrintTargetRecording here, but we can't until bug 1280324 is figured out
  // and fixed otherwise we will cause bug 1280181 to happen again.
  RefPtr<PrintTarget> target = PrintTargetThebes::CreateOrNull(surface);

  return target.forget();
}

NS_IMETHODIMP
nsDeviceContextSpecProxy::GetDrawEventRecorder(mozilla::gfx::DrawEventRecorder** aDrawEventRecorder)
{
  MOZ_ASSERT(aDrawEventRecorder);
  RefPtr<mozilla::gfx::DrawEventRecorder> result = mRecorder;
  result.forget(aDrawEventRecorder);
  return NS_OK;
}

float
nsDeviceContextSpecProxy::GetDPI()
{
  MOZ_ASSERT(mRealDeviceContextSpec);

  return mRealDeviceContextSpec->GetDPI();
}

float
nsDeviceContextSpecProxy::GetPrintingScale()
{
  MOZ_ASSERT(mRealDeviceContextSpec);

  return mRealDeviceContextSpec->GetPrintingScale();
}

nsresult
nsDeviceContextSpecProxy::CreateUniqueTempPath(nsACString& aFilePath)
{
  MOZ_ASSERT(mRecordingDir);
  MOZ_ASSERT(mUuidGenerator);

  nsID uuid;
  nsresult rv = mUuidGenerator->GenerateUUIDInPlace(&uuid);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  char uuidChars[NSID_LENGTH];
  uuid.ToProvidedString(uuidChars);
  mRecordingFileName.AssignASCII(uuidChars);

  nsCOMPtr<nsIFile> recordingFile;
  rv = mRecordingDir->Clone(getter_AddRefs(recordingFile));
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  rv = recordingFile->AppendNative(mRecordingFileName);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  return recordingFile->GetNativePath(aFilePath);
}

NS_IMETHODIMP
nsDeviceContextSpecProxy::BeginDocument(const nsAString& aTitle,
                                        const nsAString& aPrintToFileName,
                                        int32_t aStartPage, int32_t aEndPage)
{
  nsAutoCString recordingPath;
  nsresult rv = CreateUniqueTempPath(recordingPath);
  if (NS_FAILED(rv)) {
    return rv;
  }

  mRecorder = new mozilla::layout::DrawEventRecorderPRFileDesc(recordingPath.get());
  return mRemotePrintJob->InitializePrint(nsString(aTitle),
                                          nsString(aPrintToFileName),
                                          aStartPage, aEndPage);
}

NS_IMETHODIMP
nsDeviceContextSpecProxy::EndDocument()
{
  Unused << mRemotePrintJob->SendFinalizePrint();
  return NS_OK;
}

NS_IMETHODIMP
nsDeviceContextSpecProxy::AbortDocument()
{
  Unused << mRemotePrintJob->SendAbortPrint(NS_OK);
  return NS_OK;
}

NS_IMETHODIMP
nsDeviceContextSpecProxy::BeginPage()
{
  // Reopen the file, if necessary, ready for the next page.
  if (!mRecorder->IsOpen()) {
    nsAutoCString recordingPath;
    nsresult rv = CreateUniqueTempPath(recordingPath);
    if (NS_FAILED(rv)) {
      return rv;
    }

    mRecorder->OpenNew(recordingPath.get());
  }

  return NS_OK;
}

NS_IMETHODIMP
nsDeviceContextSpecProxy::EndPage()
{
  // Send the page recording to the parent.
  mRecorder->Close();
  mRemotePrintJob->ProcessPage(mRecordingFileName);

  return NS_OK;
}