Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3059 insertions, 0 deletions

diff --git a/layout/printing/nsPrintJob.cpp b/layout/printing/nsPrintJob.cpp
new file mode 100644
index 0000000000..fe4e7cb1b8
--- /dev/null
+++ b/layout/printing/nsPrintJob.cpp
@@ -0,0 +1,3059 @@
+/* -*- 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 "nsPrintJob.h"
+
+#include "nsDebug.h"
+#include "nsDocShell.h"
+#include "nsReadableUtils.h"
+#include "nsCRT.h"
+#include "nsQueryObject.h"
+
+#include "mozilla/AsyncEventDispatcher.h"
+#include "mozilla/ResultExtensions.h"
+#include "mozilla/ComputedStyleInlines.h"
+#include "mozilla/dom/BrowsingContext.h"
+#include "mozilla/dom/PBrowser.h"
+#include "mozilla/dom/Selection.h"
+#include "mozilla/dom/CustomEvent.h"
+#include "mozilla/dom/HTMLCanvasElement.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/StaticPrefs_print.h"
+#include "mozilla/Telemetry.h"
+#include "nsIBrowserChild.h"
+#include "nsIOService.h"
+#include "nsIScriptGlobalObject.h"
+#include "nsIStringBundle.h"
+#include "nsPIDOMWindow.h"
+#include "nsPrintData.h"
+#include "nsPrintObject.h"
+#include "nsIDocShell.h"
+#include "nsIURI.h"
+#include "nsITextToSubURI.h"
+#include "nsError.h"
+
+#include "nsView.h"
+#include <algorithm>
+
+// Print Options
+#include "nsIPrintSettings.h"
+#include "nsIPrintSettingsService.h"
+#include "nsIPrintSession.h"
+#include "nsGfxCIID.h"
+#include "nsGkAtoms.h"
+#include "nsXPCOM.h"
+
+static const char sPrintSettingsServiceContractID[] =
+    "@mozilla.org/gfx/printsettings-service;1";
+
+#include "nsThreadUtils.h"
+
+// Printing
+#include "nsIWebBrowserPrint.h"
+
+// Print Preview
+
+// Print Progress
+#include "nsIObserver.h"
+
+// Print error dialog
+
+// Printing Prompts
+#include "nsIPrintingPromptService.h"
+static const char kPrintingPromptService[] =
+    "@mozilla.org/embedcomp/printingprompt-service;1";
+
+// Printing Timer
+#include "nsPagePrintTimer.h"
+
+// FrameSet
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/DocumentInlines.h"
+
+// Focus
+
+// Misc
+#include "gfxContext.h"
+#include "mozilla/gfx/DrawEventRecorder.h"
+#include "mozilla/layout/RemotePrintJobChild.h"
+#include "nsISupportsUtils.h"
+#include "nsIScriptContext.h"
+#include "nsIDocumentObserver.h"
+#include "nsContentCID.h"
+#include "nsLayoutCID.h"
+#include "nsContentUtils.h"
+#include "nsLayoutUtils.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/PresShell.h"
+#include "Text.h"
+
+#include "nsWidgetsCID.h"
+#include "nsIDeviceContextSpec.h"
+#include "nsDeviceContextSpecProxy.h"
+#include "nsViewManager.h"
+
+#include "nsPageSequenceFrame.h"
+#include "nsIInterfaceRequestor.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsIWebBrowserChrome.h"
+#include "nsFrameManager.h"
+#include "mozilla/ReflowInput.h"
+#include "nsIContentViewer.h"
+#include "nsIDocumentViewerPrint.h"
+
+#include "nsFocusManager.h"
+#include "nsRange.h"
+#include "mozilla/Components.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/HTMLFrameElement.h"
+#include "nsContentList.h"
+#include "xpcpublic.h"
+#include "nsVariant.h"
+#include "mozilla/ServoStyleSet.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+//-----------------------------------------------------
+// PR LOGGING
+#include "mozilla/Logging.h"
+
+#ifdef DEBUG
+// PR_LOGGING is force to always be on (even in release builds)
+// but we only want some of it on,
+//#define EXTENDED_DEBUG_PRINTING
+#endif
+
+// this log level turns on the dumping of each document's layout info
+#define DUMP_LAYOUT_LEVEL (static_cast<mozilla::LogLevel>(9))
+
+#ifndef PR_PL
+static mozilla::LazyLogModule gPrintingLog("printing");
+
+#  define PR_PL(_p1) MOZ_LOG(gPrintingLog, mozilla::LogLevel::Debug, _p1);
+#endif
+
+#ifdef EXTENDED_DEBUG_PRINTING
+static uint32_t gDumpFileNameCnt = 0;
+static uint32_t gDumpLOFileNameCnt = 0;
+#endif
+
+#define PRT_YESNO(_p) ((_p) ? "YES" : "NO")
+static const char* gFrameTypesStr[] = {"eDoc", "eFrame", "eIFrame",
+                                       "eFrameSet"};
+
+// This processes the selection on aOrigDoc and creates an inverted selection on
+// aDoc, which it then deletes. If the start or end of the inverted selection
+// ranges occur in text nodes then an ellipsis is added.
+static nsresult DeleteNonSelectedNodes(Document& aDoc);
+
+#ifdef EXTENDED_DEBUG_PRINTING
+// Forward Declarations
+static void DumpPrintObjectsListStart(const char* aStr,
+                                      const nsTArray<nsPrintObject*>& aDocList);
+static void DumpPrintObjectsTree(nsPrintObject* aPO, int aLevel = 0,
+                                 FILE* aFD = nullptr);
+static void DumpPrintObjectsTreeLayout(const UniquePtr<nsPrintObject>& aPO,
+                                       nsDeviceContext* aDC, int aLevel = 0,
+                                       FILE* aFD = nullptr);
+
+#  define DUMP_DOC_LIST(_title) \
+    DumpPrintObjectsListStart((_title), mPrt->mPrintDocList);
+#  define DUMP_DOC_TREE DumpPrintObjectsTree(mPrt->mPrintObject.get());
+#  define DUMP_DOC_TREELAYOUT \
+    DumpPrintObjectsTreeLayout(mPrt->mPrintObject, mPrt->mPrintDC);
+#else
+#  define DUMP_DOC_LIST(_title)
+#  define DUMP_DOC_TREE
+#  define DUMP_DOC_TREELAYOUT
+#endif
+
+// -------------------------------------------------------
+// Helpers
+// -------------------------------------------------------
+
+static bool HasFramesetChild(nsIContent* aContent) {
+  if (!aContent) {
+    return false;
+  }
+
+  // do a breadth search across all siblings
+  for (nsIContent* child = aContent->GetFirstChild(); child;
+       child = child->GetNextSibling()) {
+    if (child->IsHTMLElement(nsGkAtoms::frameset)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+static bool IsParentAFrameSet(nsIDocShell* aParent) {
+  // See if the incoming doc is the root document
+  if (!aParent) return false;
+
+  // When it is the top level document we need to check
+  // to see if it contains a frameset. If it does, then
+  // we only want to print the doc's children and not the document itself
+  // For anything else we always print all the children and the document
+  // for example, if the doc contains an IFRAME we eant to print the child
+  // document (the IFRAME) and then the rest of the document.
+  //
+  // XXX we really need to search the frame tree, and not the content
+  // but there is no way to distinguish between IFRAMEs and FRAMEs
+  // with the GetFrameType call.
+  // Bug 53459 has been files so we can eventually distinguish
+  // between IFRAME frames and FRAME frames
+  bool isFrameSet = false;
+  // only check to see if there is a frameset if there is
+  // NO parent doc for this doc. meaning this parent is the root doc
+  nsCOMPtr<Document> doc = aParent->GetDocument();
+  if (doc) {
+    nsIContent* rootElement = doc->GetRootElement();
+    if (rootElement) {
+      isFrameSet = HasFramesetChild(rootElement);
+    }
+  }
+  return isFrameSet;
+}
+
+/**
+ * Build a tree of nsPrintObjects under aPO. It also appends a (depth first)
+ * flat list of all the nsPrintObjects created to aPrintData->mPrintDocList. If
+ * one of the nsPrintObject's document is the focused document, then the print
+ * object is set as aPrintData->mSelectionRoot.
+ * @param aParentPO The parent nsPrintObject to populate, must not be null.
+ * @param aFocusedDoc Document from the window that had focus when print was
+ *                    initiated.
+ * @param aPrintData nsPrintData for the current print, must not be null.
+ */
+static void BuildNestedPrintObjects(const UniquePtr<nsPrintObject>& aParentPO,
+                                    const RefPtr<Document>& aFocusedDoc,
+                                    RefPtr<nsPrintData>& aPrintData) {
+  MOZ_ASSERT(aParentPO);
+  MOZ_ASSERT(aPrintData);
+
+  // If aParentPO is for an iframe and its original document is focusedDoc then
+  // always set as the selection root.
+  if (aParentPO->mFrameType == eIFrame &&
+      aParentPO->mDocument->GetOriginalDocument() == aFocusedDoc) {
+    aPrintData->mSelectionRoot = aParentPO.get();
+  } else if (!aPrintData->mSelectionRoot && aParentPO->HasSelection()) {
+    // If there is no focused iframe but there is a selection in one or more
+    // frames then we want to set the root nsPrintObject as the focus root so
+    // that later EnablePrintingSelectionOnly can search for and enable all
+    // nsPrintObjects containing selections.
+    aPrintData->mSelectionRoot = aPrintData->mPrintObject.get();
+  }
+
+  for (auto& bc : aParentPO->mDocShell->GetBrowsingContext()->Children()) {
+    nsCOMPtr<nsIDocShell> docShell = bc->GetDocShell();
+    if (!docShell) {
+      continue;
+    }
+
+    RefPtr<Document> doc = docShell->GetDocument();
+    MOZ_DIAGNOSTIC_ASSERT(doc);
+    // We might find non-static documents here if the fission remoteness change
+    // hasn't happened / finished yet. In that case, just skip them, the same
+    // way we do for remote frames above.
+    MOZ_DIAGNOSTIC_ASSERT(doc->IsStaticDocument() || doc->IsInitialDocument());
+    if (!doc || !doc->IsStaticDocument()) {
+      continue;
+    }
+
+    auto childPO = MakeUnique<nsPrintObject>();
+    nsresult rv = childPO->InitAsNestedObject(docShell, doc, aParentPO.get());
+    if (NS_FAILED(rv)) {
+      MOZ_ASSERT_UNREACHABLE("Init failed?");
+    }
+
+    aPrintData->mPrintDocList.AppendElement(childPO.get());
+    BuildNestedPrintObjects(childPO, aFocusedDoc, aPrintData);
+    aParentPO->mKids.AppendElement(std::move(childPO));
+  }
+}
+
+/**
+ * On platforms that support it, sets the printer name stored in the
+ * nsIPrintSettings to the last-used printer if a printer name is not already
+ * set.
+ * XXXjwatt: Why is this necessary? Can't the code that reads the printer
+ * name later "just" use the last-used printer if a name isn't specified? Then
+ * we wouldn't have this inconsistency between platforms and processes.
+ */
+static nsresult EnsureSettingsHasPrinterNameSet(
+    nsIPrintSettings* aPrintSettings) {
+#if defined(XP_MACOSX) || defined(ANDROID)
+  // Mac doesn't support retrieving a printer list.
+  return NS_OK;
+#else
+  NS_ENSURE_ARG_POINTER(aPrintSettings);
+
+  // See if aPrintSettings already has a printer
+  nsString printerName;
+  nsresult rv = aPrintSettings->GetPrinterName(printerName);
+  if (NS_SUCCEEDED(rv) && !printerName.IsEmpty()) {
+    return NS_OK;
+  }
+
+  // aPrintSettings doesn't have a printer set.
+  // Try to fetch the name of the last-used printer.
+  nsCOMPtr<nsIPrintSettingsService> printSettingsService =
+      do_GetService(sPrintSettingsServiceContractID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = printSettingsService->GetLastUsedPrinterName(printerName);
+  if (NS_SUCCEEDED(rv) && !printerName.IsEmpty()) {
+    rv = aPrintSettings->SetPrinterName(printerName);
+  }
+  return rv;
+#endif
+}
+
+static nsresult GetDefaultPrintSettings(nsIPrintSettings** aSettings) {
+  *aSettings = nullptr;
+
+  nsresult rv = NS_ERROR_FAILURE;
+  nsCOMPtr<nsIPrintSettingsService> printSettingsService =
+      do_GetService(sPrintSettingsServiceContractID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return printSettingsService->GetDefaultPrintSettingsForPrinting(aSettings);
+}
+
+//-------------------------------------------------------
+
+NS_IMPL_ISUPPORTS(nsPrintJob, nsIWebProgressListener, nsISupportsWeakReference,
+                  nsIObserver)
+
+//-------------------------------------------------------
+nsPrintJob::nsPrintJob() = default;
+
+nsPrintJob::~nsPrintJob() {
+  Destroy();  // for insurance
+  DisconnectPagePrintTimer();
+}
+
+bool nsPrintJob::CheckBeforeDestroy() const {
+  return mPrt && mPrt->mPreparingForPrint;
+}
+
+PresShell* nsPrintJob::GetPrintPreviewPresShell() {
+  return mPrtPreview->mPrintObject->mPresShell;
+}
+
+//-------------------------------------------------------
+void nsPrintJob::Destroy() {
+  if (mIsDestroying) {
+    return;
+  }
+  mIsDestroying = true;
+
+  mPrt = nullptr;
+
+#ifdef NS_PRINT_PREVIEW
+  mPrtPreview = nullptr;
+#endif
+  mDocViewerPrint = nullptr;
+}
+
+//-------------------------------------------------------
+void nsPrintJob::DestroyPrintingData() { mPrt = nullptr; }
+
+//---------------------------------------------------------------------------------
+//-- Section: Methods needed by the DocViewer
+//---------------------------------------------------------------------------------
+
+//--------------------------------------------------------
+nsresult nsPrintJob::Initialize(nsIDocumentViewerPrint* aDocViewerPrint,
+                                nsIDocShell* aDocShell, Document* aOriginalDoc,
+                                float aScreenDPI) {
+  NS_ENSURE_ARG_POINTER(aDocViewerPrint);
+  NS_ENSURE_ARG_POINTER(aDocShell);
+  NS_ENSURE_ARG_POINTER(aOriginalDoc);
+
+  mDocViewerPrint = aDocViewerPrint;
+  mDocShell = do_GetWeakReference(aDocShell);
+  mScreenDPI = aScreenDPI;
+
+  // Anything state that we need from aOriginalDoc must be fetched and stored
+  // here, since the document that the user selected to print may mutate
+  // across consecutive PrintPreview() calls.
+
+  Element* root = aOriginalDoc->GetRootElement();
+  mDisallowSelectionPrint =
+      root &&
+      root->HasAttr(kNameSpaceID_None, nsGkAtoms::mozdisallowselectionprint);
+
+  if (nsPIDOMWindowOuter* window = aOriginalDoc->GetWindow()) {
+    if (nsCOMPtr<nsIWebBrowserChrome> wbc = window->GetWebBrowserChrome()) {
+      // We only get this in order to skip opening the progress dialog when
+      // the window is modal.  Once the platform code stops opening the
+      // progress dialog (bug 1558907), we can get rid of this.
+      wbc->IsWindowModal(&mIsForModalWindow);
+    }
+  }
+
+  return NS_OK;
+}
+
+//-------------------------------------------------------
+nsresult nsPrintJob::Cancel() {
+  if (mPrt && mPrt->mPrintSettings) {
+    return mPrt->mPrintSettings->SetIsCancelled(true);
+  }
+  return NS_ERROR_FAILURE;
+}
+
+//-----------------------------------------------------------------
+std::tuple<nsPageSequenceFrame*, int32_t>
+nsPrintJob::GetSeqFrameAndCountSheets() const {
+  nsPrintData* printData = mPrtPreview ? mPrtPreview : mPrt;
+  if (NS_WARN_IF(!printData)) {
+    return {nullptr, 0};
+  }
+
+  const nsPrintObject* po = printData->mPrintObject.get();
+  if (NS_WARN_IF(!po)) {
+    return {nullptr, 0};
+  }
+
+  // This is sometimes incorrectly called before the pres shell has been created
+  // (bug 1141756). MOZ_DIAGNOSTIC_ASSERT so we'll still see the crash in
+  // Nightly/Aurora in case the other patch fixes this.
+  if (!po->mPresShell) {
+    MOZ_DIAGNOSTIC_ASSERT(
+        false, "GetSeqFrameAndCountSheets needs a non-null pres shell");
+    return {nullptr, 0};
+  }
+
+  nsPageSequenceFrame* seqFrame = po->mPresShell->GetPageSequenceFrame();
+  if (!seqFrame) {
+    return {nullptr, 0};
+  }
+
+  // count the total number of sheets
+  return {seqFrame, seqFrame->PrincipalChildList().GetLength()};
+}
+//---------------------------------------------------------------------------------
+//-- Done: Methods needed by the DocViewer
+//---------------------------------------------------------------------------------
+
+//---------------------------------------------------------------------------------
+//-- Section: nsIWebBrowserPrint
+//---------------------------------------------------------------------------------
+
+// Foward decl for Debug Helper Functions
+#ifdef EXTENDED_DEBUG_PRINTING
+#  ifdef XP_WIN
+static int RemoveFilesInDir(const char* aDir);
+#  endif
+static void GetDocTitleAndURL(const UniquePtr<nsPrintObject>& aPO,
+                              nsACString& aDocStr, nsACString& aURLStr);
+static void DumpPrintObjectsTree(nsPrintObject* aPO, int aLevel, FILE* aFD);
+static void DumpPrintObjectsList(const nsTArray<nsPrintObject*>& aDocList);
+static void RootFrameList(nsPresContext* aPresContext, FILE* out,
+                          const char* aPrefix);
+static void DumpViews(nsIDocShell* aDocShell, FILE* out);
+static void DumpLayoutData(const char* aTitleStr, const char* aURLStr,
+                           nsPresContext* aPresContext, nsDeviceContext* aDC,
+                           nsIFrame* aRootFrame, nsIDocShell* aDocShell,
+                           FILE* aFD);
+#endif
+
+//--------------------------------------------------------------------------------
+
+nsresult nsPrintJob::CommonPrint(bool aIsPrintPreview,
+                                 nsIPrintSettings* aPrintSettings,
+                                 nsIWebProgressListener* aWebProgressListener,
+                                 Document* aSourceDoc) {
+  // Callers must hold a strong reference to |this| to ensure that we stay
+  // alive for the duration of this method, because our main owning reference
+  // (on nsDocumentViewer) might be cleared during this function (if we cause
+  // script to run and it cancels the print operation).
+
+  nsresult rv = DoCommonPrint(aIsPrintPreview, aPrintSettings,
+                              aWebProgressListener, aSourceDoc);
+  if (NS_FAILED(rv)) {
+    if (aIsPrintPreview) {
+      mIsCreatingPrintPreview = false;
+      SetIsPrintPreview(false);
+    } else {
+      SetIsPrinting(false);
+    }
+    if (mProgressDialogIsShown) CloseProgressDialog(aWebProgressListener);
+    if (rv != NS_ERROR_ABORT && rv != NS_ERROR_OUT_OF_MEMORY) {
+      FirePrintingErrorEvent(rv);
+    }
+    mPrt = nullptr;
+  }
+
+  return rv;
+}
+
+nsresult nsPrintJob::DoCommonPrint(bool aIsPrintPreview,
+                                   nsIPrintSettings* aPrintSettings,
+                                   nsIWebProgressListener* aWebProgressListener,
+                                   Document* aDoc) {
+  MOZ_ASSERT(aDoc->IsStaticDocument());
+
+  nsresult rv;
+
+  // Grab the new instance with local variable to guarantee that it won't be
+  // deleted during this method.
+  // Note: Methods we call early below rely on mPrt being set.
+  mPrt = new nsPrintData(aIsPrintPreview ? nsPrintData::eIsPrintPreview
+                                         : nsPrintData::eIsPrinting);
+  RefPtr<nsPrintData> printData = mPrt;
+
+  if (aIsPrintPreview) {
+    // The WebProgressListener can be QI'ed to nsIPrintingPromptService
+    // then that means the progress dialog is already being shown.
+    nsCOMPtr<nsIPrintingPromptService> pps(
+        do_QueryInterface(aWebProgressListener));
+    mProgressDialogIsShown = pps != nullptr;
+
+    mIsCreatingPrintPreview = true;
+
+    // Our new print preview nsPrintData is stored in mPtr until we move it
+    // to mPrtPreview once we've finish creating the print preview. We must
+    // clear mPtrPreview so that code will use mPtr until that happens.
+    mPrtPreview = nullptr;
+
+    SetIsPrintPreview(true);
+  } else {
+    mProgressDialogIsShown = false;
+
+    SetIsPrinting(true);
+  }
+
+  if (aWebProgressListener) {
+    printData->mPrintProgressListeners.AppendObject(aWebProgressListener);
+  }
+
+  // Get the document from the currently focused window.
+  RefPtr<Document> focusedDoc = FindFocusedDocument(aDoc);
+
+  // Get the docshell for this documentviewer
+  nsCOMPtr<nsIDocShell> docShell(do_QueryReferent(mDocShell, &rv));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  {
+    nsAutoScriptBlocker scriptBlocker;
+    printData->mPrintObject = MakeUnique<nsPrintObject>();
+    rv = printData->mPrintObject->InitAsRootObject(docShell, aDoc,
+                                                   mIsCreatingPrintPreview);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    printData->mPrintDocList.AppendElement(printData->mPrintObject.get());
+
+    printData->mIsParentAFrameSet = IsParentAFrameSet(docShell);
+    printData->mPrintObject->mFrameType =
+        printData->mIsParentAFrameSet ? eFrameSet : eDoc;
+
+    BuildNestedPrintObjects(printData->mPrintObject, focusedDoc, printData);
+  }
+
+  // The nsAutoScriptBlocker above will now have been destroyed, which may
+  // cause our print/print-preview operation to finish. In this case, we
+  // should immediately return an error code so that the root caller knows
+  // it shouldn't continue to do anything with this instance.
+  if (mIsDestroying) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // XXX This isn't really correct...
+  if (!printData->mPrintObject->mDocument ||
+      !printData->mPrintObject->mDocument->GetRootElement())
+    return NS_ERROR_GFX_PRINTER_STARTDOC;
+
+  // if they don't pass in a PrintSettings, then get the Global PS
+  printData->mPrintSettings = aPrintSettings;
+  if (!printData->mPrintSettings) {
+    MOZ_TRY(GetDefaultPrintSettings(getter_AddRefs(printData->mPrintSettings)));
+  }
+
+  MOZ_TRY(EnsureSettingsHasPrinterNameSet(printData->mPrintSettings));
+
+  printData->mPrintSettings->SetIsCancelled(false);
+  printData->mPrintSettings->GetShrinkToFit(&printData->mShrinkToFit);
+
+  // Create a print session and let the print settings know about it.
+  // Don't overwrite an existing print session.
+  // The print settings hold an nsWeakPtr to the session so it does not
+  // need to be cleared from the settings at the end of the job.
+  // XXX What lifetime does the printSession need to have?
+  nsCOMPtr<nsIPrintSession> printSession;
+  bool remotePrintJobListening = false;
+  if (!mIsCreatingPrintPreview) {
+    rv = printData->mPrintSettings->GetPrintSession(
+        getter_AddRefs(printSession));
+    if (NS_FAILED(rv) || !printSession) {
+      printSession = do_CreateInstance("@mozilla.org/gfx/printsession;1", &rv);
+      NS_ENSURE_SUCCESS(rv, rv);
+      printData->mPrintSettings->SetPrintSession(printSession);
+    } else {
+      RefPtr<layout::RemotePrintJobChild> remotePrintJob =
+          printSession->GetRemotePrintJob();
+      if (remotePrintJob) {
+        // If we have a RemotePrintJob add it to the print progress listeners,
+        // so it can forward to the parent.
+        printData->mPrintProgressListeners.AppendElement(remotePrintJob);
+        remotePrintJobListening = true;
+      }
+    }
+  }
+
+  // Now determine how to set up the Frame print UI
+  printData->mPrintSettings->SetIsPrintSelectionRBEnabled(
+      !mDisallowSelectionPrint && printData->mSelectionRoot);
+
+  bool printingViaParent =
+      XRE_IsContentProcess() && Preferences::GetBool("print.print_via_parent");
+  nsCOMPtr<nsIDeviceContextSpec> devspec;
+  if (printingViaParent) {
+    devspec = new nsDeviceContextSpecProxy();
+  } else {
+    devspec = do_CreateInstance("@mozilla.org/gfx/devicecontextspec;1", &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  bool printSilently = false;
+  printData->mPrintSettings->GetPrintSilent(&printSilently);
+  if (StaticPrefs::print_always_print_silent()) {
+    printSilently = true;
+  }
+
+  if (mIsDoingPrinting && printSilently) {
+    Telemetry::ScalarAdd(Telemetry::ScalarID::PRINTING_SILENT_PRINT, 1);
+  }
+
+  // If printing via parent we still call ShowPrintDialog even for print preview
+  // because we use that to retrieve the print settings from the printer.
+  // The dialog is not shown, but this means we don't need to access the printer
+  // driver from the child, which causes sandboxing issues.
+  if (!mIsCreatingPrintPreview || printingViaParent) {
+    // The new print UI does not need to enter ShowPrintDialog below to spin
+    // the event loop and fetch real printer settings from the parent process,
+    // since it always passes complete print settings. (In fact, trying to
+    // fetch them from the parent can cause crashes.) Here we check for that
+    // case so that we can avoid calling ShowPrintDialog below. To err on the
+    // safe side, we exclude the old UI.
+    //
+    // TODO: We should MOZ_DIAGNOSTIC_ASSERT that GetIsInitializedFromPrinter
+    // returns true.
+    bool settingsAreComplete = false;
+    if (StaticPrefs::print_tab_modal_enabled()) {
+      printData->mPrintSettings->GetIsInitializedFromPrinter(
+          &settingsAreComplete);
+    }
+
+    // Ask dialog to be Print Shown via the Plugable Printing Dialog Service
+    // This service is for the Print Dialog and the Print Progress Dialog
+    // If printing silently or you can't get the service continue on
+    // If printing via the parent then we need to confirm that the pref is set
+    // and get a remote print job, but the parent won't display a prompt.
+    if (!settingsAreComplete && (!printSilently || printingViaParent)) {
+      nsCOMPtr<nsIPrintingPromptService> printPromptService(
+          do_GetService(kPrintingPromptService));
+      if (printPromptService) {
+        nsPIDOMWindowOuter* domWin = nullptr;
+        // We leave domWin as nullptr to indicate a call for print preview.
+        if (!mIsCreatingPrintPreview) {
+          domWin = aDoc->GetOriginalDocument()->GetWindow();
+          NS_ENSURE_TRUE(domWin, NS_ERROR_FAILURE);
+
+          if (!printSilently) {
+            if (mCreatedForPrintPreview) {
+              Telemetry::ScalarAdd(
+                  Telemetry::ScalarID::PRINTING_DIALOG_OPENED_VIA_PREVIEW, 1);
+            } else {
+              Telemetry::ScalarAdd(
+                  Telemetry::ScalarID::PRINTING_DIALOG_OPENED_WITHOUT_PREVIEW,
+                  1);
+            }
+          }
+        }
+
+        // Platforms not implementing a given dialog for the service may
+        // return NS_ERROR_NOT_IMPLEMENTED or an error code.
+        //
+        // NS_ERROR_NOT_IMPLEMENTED indicates they want default behavior
+        // Any other error code means we must bail out
+        //
+        rv = printPromptService->ShowPrintDialog(domWin,
+                                                 printData->mPrintSettings);
+
+        if (!mIsCreatingPrintPreview) {
+          if (rv == NS_ERROR_ABORT) {
+            // When printing silently we can't get here since the user doesn't
+            // have the opportunity to cancel printing.
+            if (mCreatedForPrintPreview) {
+              Telemetry::ScalarAdd(
+                  Telemetry::ScalarID::PRINTING_DIALOG_VIA_PREVIEW_CANCELLED,
+                  1);
+            } else {
+              Telemetry::ScalarAdd(
+                  Telemetry::ScalarID::
+                      PRINTING_DIALOG_WITHOUT_PREVIEW_CANCELLED,
+                  1);
+            }
+          }
+        }
+
+        //
+        // ShowPrintDialog triggers an event loop which means we can't assume
+        // that the state of this->{anything} matches the state we've checked
+        // above. Including that a given {thing} is non null.
+        if (NS_WARN_IF(mPrt != printData)) {
+          return NS_ERROR_FAILURE;
+        }
+
+        if (NS_SUCCEEDED(rv)) {
+          // since we got the dialog and it worked then make sure we
+          // are telling GFX we want to print silent
+          printSilently = true;
+
+          if (printData->mPrintSettings && !mIsCreatingPrintPreview) {
+            // The user might have changed shrink-to-fit in the print dialog, so
+            // update our copy of its state
+            printData->mPrintSettings->GetShrinkToFit(&printData->mShrinkToFit);
+
+            // If we haven't already added the RemotePrintJob as a listener,
+            // add it now if there is one.
+            if (!remotePrintJobListening) {
+              RefPtr<layout::RemotePrintJobChild> remotePrintJob =
+                  printSession->GetRemotePrintJob();
+              if (remotePrintJob) {
+                printData->mPrintProgressListeners.AppendElement(
+                    remotePrintJob);
+                remotePrintJobListening = true;
+              }
+            }
+          }
+        } else if (rv == NS_ERROR_NOT_IMPLEMENTED) {
+          // This means the Dialog service was there,
+          // but they choose not to implement this dialog and
+          // are looking for default behavior from the toolkit
+          rv = NS_OK;
+        }
+      } else {
+        // No dialog service available
+        rv = NS_ERROR_NOT_IMPLEMENTED;
+      }
+    } else if (printSilently && !printingViaParent) {
+      // The condition above is only so contorted in order to enter this block
+      // under the exact same circumstances as we used to, in order to
+      // minimize risk for this change which may be getting late Beta uplift.
+      // Frankly calling SetupSilentPrinting should not be necessary any more
+      // since nsDeviceContextSpecGTK::EndDocument does what we need using a
+      // Runnable instead of spinning an event loop in a risk place like here.
+      // Additionally we should never need to do this when setting up print
+      // preview, we would only need it for printing.
+
+      // Call any code that requires a run of the event loop.
+      rv = printData->mPrintSettings->SetupSilentPrinting();
+    }
+    // Check explicitly for abort because it's expected
+    if (rv == NS_ERROR_ABORT) return rv;
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  MOZ_TRY(devspec->Init(nullptr, printData->mPrintSettings,
+                        mIsCreatingPrintPreview));
+
+  printData->mPrintDC = new nsDeviceContext();
+  MOZ_TRY(printData->mPrintDC->InitForPrinting(devspec));
+
+  if (XRE_IsParentProcess() && !printData->mPrintDC->IsSyncPagePrinting()) {
+    RefPtr<nsPrintJob> self(this);
+    printData->mPrintDC->RegisterPageDoneCallback(
+        [self](nsresult aResult) { self->PageDone(aResult); });
+  }
+
+  if (!mozilla::StaticPrefs::print_tab_modal_enabled() &&
+      mIsCreatingPrintPreview) {
+    // In legacy print-preview mode, override any UI that wants to PrintPreview
+    // any selection or page range.  The legacy print-preview intends to view
+    // every page in PrintPreview each time.
+    printData->mPrintSettings->SetPageRanges({});
+  }
+
+  MOZ_TRY(EnablePOsForPrinting());
+
+  if (mIsCreatingPrintPreview) {
+    bool notifyOnInit = false;
+    ShowPrintProgress(false, notifyOnInit, aDoc);
+
+    if (!notifyOnInit) {
+      rv = InitPrintDocConstruction(false);
+    } else {
+      rv = NS_OK;
+    }
+  } else {
+    bool doNotify;
+    ShowPrintProgress(true, doNotify, aDoc);
+    if (!doNotify) {
+      // Print listener setup...
+      printData->OnStartPrinting();
+
+      rv = InitPrintDocConstruction(false);
+    }
+  }
+
+  return NS_OK;
+}
+
+//---------------------------------------------------------------------------------
+nsresult nsPrintJob::Print(Document* aSourceDoc,
+                           nsIPrintSettings* aPrintSettings,
+                           nsIWebProgressListener* aWebProgressListener) {
+  // If we have a print preview document, use that instead of the original
+  // mDocument. That way animated images etc. get printed using the same state
+  // as in print preview.
+  RefPtr<Document> doc = mPrtPreview && mPrtPreview->mPrintObject
+                             ? mPrtPreview->mPrintObject->mDocument.get()
+                             : aSourceDoc;
+
+  nsresult rv = CommonPrint(false, aPrintSettings, aWebProgressListener, doc);
+
+  if (!aPrintSettings) {
+    // This is temporary until after bug 1602410 lands.
+    return rv;
+  }
+
+  // Save the print settings if the user picked them.
+  // We should probably do this immediately after the user confirms their
+  // selection (that is, move this to nsPrintingPromptService::ShowPrintDialog,
+  // just after the nsIPrintDialogService::Show call returns).
+  bool printSilently;
+  aPrintSettings->GetPrintSilent(&printSilently);
+  if (!printSilently) {  // user picked settings
+    bool saveOnCancel;
+    aPrintSettings->GetSaveOnCancel(&saveOnCancel);
+    if ((rv != NS_ERROR_ABORT || saveOnCancel) &&
+        Preferences::GetBool("print.save_print_settings", false)) {
+      nsCOMPtr<nsIPrintSettingsService> printSettingsService =
+          do_GetService("@mozilla.org/gfx/printsettings-service;1");
+      printSettingsService->SavePrintSettingsToPrefs(
+          aPrintSettings, true, nsIPrintSettings::kInitSaveAll);
+      printSettingsService->SavePrintSettingsToPrefs(
+          aPrintSettings, false, nsIPrintSettings::kInitSavePrinterName);
+    }
+  }
+
+  return rv;
+}
+
+nsresult nsPrintJob::PrintPreview(Document* aSourceDoc,
+                                  nsIPrintSettings* aPrintSettings,
+                                  nsIWebProgressListener* aWebProgressListener,
+                                  PrintPreviewResolver&& aCallback) {
+  // Take ownership of aCallback, otherwise a function further up the call
+  // stack will call it to signal failure (by passing zero).
+  mPrintPreviewCallback = std::move(aCallback);
+
+  nsresult rv =
+      CommonPrint(true, aPrintSettings, aWebProgressListener, aSourceDoc);
+  if (NS_FAILED(rv)) {
+    if (mPrintPreviewCallback) {
+      mPrintPreviewCallback(
+          PrintPreviewResultInfo(0, 0, false, false, false));  // signal error
+      mPrintPreviewCallback = nullptr;
+    }
+  }
+  return rv;
+}
+
+int32_t nsPrintJob::GetRawNumPages() const {
+  auto [seqFrame, numSheets] = GetSeqFrameAndCountSheets();
+  Unused << numSheets;
+  return seqFrame ? seqFrame->GetRawNumPages() : 0;
+}
+
+bool nsPrintJob::GetIsEmpty() const {
+  auto [seqFrame, numSheets] = GetSeqFrameAndCountSheets();
+  if (!seqFrame) {
+    return true;
+  }
+  if (numSheets > 1) {
+    return false;
+  }
+  return !seqFrame->GetPagesInFirstSheet();
+}
+
+int32_t nsPrintJob::GetPrintPreviewNumSheets() const {
+  auto [seqFrame, numSheets] = GetSeqFrameAndCountSheets();
+  Unused << seqFrame;
+  return numSheets;
+}
+
+already_AddRefed<nsIPrintSettings> nsPrintJob::GetCurrentPrintSettings() {
+  if (mPrt) {
+    return do_AddRef(mPrt->mPrintSettings);
+  }
+  if (mPrtPreview) {
+    return do_AddRef(mPrtPreview->mPrintSettings);
+  }
+  return nullptr;
+}
+
+//-----------------------------------------------------------------
+//-- Section: Pre-Reflow Methods
+//-----------------------------------------------------------------
+
+//----------------------------------------------------------------------
+// Set up to use the "pluggable" Print Progress Dialog
+void nsPrintJob::ShowPrintProgress(bool aIsForPrinting, bool& aDoNotify,
+                                   Document* aDoc) {
+  // default to not notifying, that if something here goes wrong
+  // or we aren't going to show the progress dialog we can straight into
+  // reflowing the doc for printing.
+  aDoNotify = false;
+
+  // Guarantee that mPrt and the objects it owns won't be deleted.  If this
+  // method shows a progress dialog and spins the event loop.  So, mPrt may be
+  // cleared or recreated.
+  RefPtr<nsPrintData> printData = mPrt;
+
+  bool showProgresssDialog =
+      !mProgressDialogIsShown && StaticPrefs::print_show_print_progress();
+
+  // Turning off the showing of Print Progress in Prefs overrides
+  // whether the calling PS desire to have it on or off, so only check PS if
+  // prefs says it's ok to be on.
+  if (showProgresssDialog) {
+    printData->mPrintSettings->GetShowPrintProgress(&showProgresssDialog);
+  }
+
+  // Now open the service to get the progress dialog
+  // If we don't get a service, that's ok, then just don't show progress
+  if (showProgresssDialog) {
+    nsCOMPtr<nsIPrintingPromptService> printPromptService(
+        do_GetService(kPrintingPromptService));
+    if (printPromptService) {
+      if (mIsForModalWindow) {
+        // Showing a print progress dialog when printing a modal window
+        // isn't supported. See bug 301560.
+        return;
+      }
+
+      nsPIDOMWindowOuter* domWin = aDoc->GetOriginalDocument()->GetWindow();
+      if (!domWin) return;
+
+      nsCOMPtr<nsIWebProgressListener> printProgressListener;
+
+      nsresult rv = printPromptService->ShowPrintProgressDialog(
+          domWin, printData->mPrintSettings, this, aIsForPrinting,
+          getter_AddRefs(printProgressListener),
+          getter_AddRefs(printData->mPrintProgressParams), &aDoNotify);
+      if (NS_SUCCEEDED(rv)) {
+        if (printProgressListener) {
+          printData->mPrintProgressListeners.AppendObject(
+              printProgressListener);
+        }
+
+        if (printData->mPrintProgressParams) {
+          SetURLAndTitleOnProgressParams(printData->mPrintObject,
+                                         printData->mPrintProgressParams);
+        }
+      }
+    }
+  }
+}
+
+// static
+void nsPrintJob::GetDisplayTitleAndURL(Document& aDoc,
+                                       nsIPrintSettings* aSettings,
+                                       DocTitleDefault aTitleDefault,
+                                       nsAString& aTitle, nsAString& aURLStr) {
+  aTitle.Truncate();
+  aURLStr.Truncate();
+
+  if (aSettings) {
+    aSettings->GetTitle(aTitle);
+    aSettings->GetDocURL(aURLStr);
+  }
+
+  if (aTitle.IsEmpty()) {
+    aDoc.GetTitle(aTitle);
+    if (aTitle.IsEmpty()) {
+      if (!aURLStr.IsEmpty() &&
+          aTitleDefault == DocTitleDefault::eDocURLElseFallback) {
+        aTitle = aURLStr;
+      } else {
+        nsCOMPtr<nsIStringBundle> brandBundle;
+        nsCOMPtr<nsIStringBundleService> svc =
+            mozilla::services::GetStringBundleService();
+        if (svc) {
+          svc->CreateBundle("chrome://branding/locale/brand.properties",
+                            getter_AddRefs(brandBundle));
+          if (brandBundle) {
+            brandBundle->GetStringFromName("brandShortName", aTitle);
+          }
+        }
+        if (aTitle.IsEmpty()) {
+          aTitle.AssignLiteral(u"Mozilla Document");
+        }
+      }
+    }
+  }
+
+  if (aURLStr.IsEmpty()) {
+    nsIURI* url = aDoc.GetDocumentURI();
+    if (!url) {
+      return;
+    }
+
+    nsCOMPtr<nsIURI> exposableURI = net::nsIOService::CreateExposableURI(url);
+    nsAutoCString urlCStr;
+    nsresult rv = exposableURI->GetSpec(urlCStr);
+    if (NS_FAILED(rv)) {
+      return;
+    }
+
+    nsCOMPtr<nsITextToSubURI> textToSubURI =
+        do_GetService(NS_ITEXTTOSUBURI_CONTRACTID, &rv);
+    if (NS_FAILED(rv)) {
+      return;
+    }
+
+    textToSubURI->UnEscapeURIForUI(urlCStr, aURLStr);
+  }
+}
+
+//---------------------------------------------------------------------
+nsresult nsPrintJob::DocumentReadyForPrinting() {
+  // Send the document to the printer...
+  nsresult rv = SetupToPrintContent();
+  if (NS_FAILED(rv)) {
+    // The print job was canceled or there was a problem
+    // So remove all other documents from the print list
+    DonePrintingSheets(nullptr, rv);
+  }
+  return rv;
+}
+
+/** ---------------------------------------------------
+ *  Cleans up when an error occurred
+ */
+nsresult nsPrintJob::CleanupOnFailure(nsresult aResult, bool aIsPrinting) {
+  PR_PL(("****  Failed %s - rv 0x%" PRIX32,
+         aIsPrinting ? "Printing" : "Print Preview",
+         static_cast<uint32_t>(aResult)));
+
+  /* cleanup... */
+  if (mPagePrintTimer) {
+    mPagePrintTimer->Stop();
+    DisconnectPagePrintTimer();
+  }
+
+  if (aIsPrinting) {
+    SetIsPrinting(false);
+  } else {
+    SetIsPrintPreview(false);
+    mIsCreatingPrintPreview = false;
+  }
+
+  /* cleanup done, let's fire-up an error dialog to notify the user
+   * what went wrong...
+   *
+   * When rv == NS_ERROR_ABORT, it means we want out of the
+   * print job without displaying any error messages
+   */
+  if (aResult != NS_ERROR_ABORT) {
+    FirePrintingErrorEvent(aResult);
+  }
+
+  FirePrintCompletionEvent();
+
+  return aResult;
+}
+
+//---------------------------------------------------------------------
+void nsPrintJob::FirePrintingErrorEvent(nsresult aPrintError) {
+  if (mPrintPreviewCallback) {
+    mPrintPreviewCallback(
+        PrintPreviewResultInfo(0, 0, false, false, false));  // signal error
+    mPrintPreviewCallback = nullptr;
+  }
+
+  nsCOMPtr<nsIContentViewer> cv = do_QueryInterface(mDocViewerPrint);
+  if (NS_WARN_IF(!cv)) {
+    return;
+  }
+
+  nsCOMPtr<Document> doc = cv->GetDocument();
+  RefPtr<CustomEvent> event = NS_NewDOMCustomEvent(doc, nullptr, nullptr);
+
+  MOZ_ASSERT(event);
+
+  AutoJSAPI jsapi;
+  if (!jsapi.Init(event->GetParentObject())) {
+    return;
+  }
+  JSContext* cx = jsapi.cx();
+
+  JS::Rooted<JS::Value> detail(
+      cx, JS::NumberValue(static_cast<double>(aPrintError)));
+  event->InitCustomEvent(cx, u"PrintingError"_ns, false, false, detail);
+  event->SetTrusted(true);
+
+  RefPtr<AsyncEventDispatcher> asyncDispatcher =
+      new AsyncEventDispatcher(doc, event);
+  asyncDispatcher->mOnlyChromeDispatch = ChromeOnlyDispatch::eYes;
+  asyncDispatcher->RunDOMEventWhenSafe();
+
+  // Inform any progress listeners of the Error.
+  if (mPrt) {
+    // Note that nsPrintData::DoOnStatusChange() will call some listeners.
+    // So, mPrt can be cleared or recreated.
+    RefPtr<nsPrintData> printData = mPrt;
+    printData->DoOnStatusChange(aPrintError);
+  }
+}
+
+//-----------------------------------------------------------------
+//-- Section: Reflow Methods
+//-----------------------------------------------------------------
+
+nsresult nsPrintJob::ReconstructAndReflow(bool doSetPixelScale) {
+  if (NS_WARN_IF(!mPrt)) {
+    return NS_ERROR_FAILURE;
+  }
+
+#if defined(XP_WIN) && defined(EXTENDED_DEBUG_PRINTING)
+  // We need to clear all the output files here
+  // because they will be re-created with second reflow of the docs
+  if (MOZ_LOG_TEST(gPrintingLog, DUMP_LAYOUT_LEVEL)) {
+    RemoveFilesInDir(".\\");
+    gDumpFileNameCnt = 0;
+    gDumpLOFileNameCnt = 0;
+  }
+#endif
+
+  // In this loop, it's conceivable that one of our helpers might clear mPrt,
+  // while we're using it & its members!  So we capture it in an owning local
+  // reference & use that instead of using mPrt directly.
+  RefPtr<nsPrintData> printData = mPrt;
+  for (uint32_t i = 0; i < printData->mPrintDocList.Length(); ++i) {
+    nsPrintObject* po = printData->mPrintDocList.ElementAt(i);
+    NS_ASSERTION(po, "nsPrintObject can't be null!");
+
+    if (!po->PrintingIsEnabled() || po->mInvisible) {
+      continue;
+    }
+
+    // When the print object has been marked as "print the document" (i.e,
+    // po->PrintingIsEnabled() is true), mPresContext and mPresShell should be
+    // non-nullptr (i.e., should've been created for the print) since they
+    // are necessary to print the document.
+    MOZ_ASSERT(po->mPresContext && po->mPresShell,
+               "mPresContext and mPresShell shouldn't be nullptr when the "
+               "print object "
+               "has been marked as \"print the document\"");
+
+    UpdateZoomRatio(po, doSetPixelScale);
+
+    po->mPresContext->SetPageScale(po->mZoomRatio);
+
+    // Calculate scale factor from printer to screen
+    float printDPI = float(AppUnitsPerCSSInch()) /
+                     float(printData->mPrintDC->AppUnitsPerDevPixel());
+    po->mPresContext->SetPrintPreviewScale(mScreenDPI / printDPI);
+
+    RefPtr<PresShell> presShell(po->mPresShell);
+    if (NS_WARN_IF(presShell->IsDestroying())) {
+      return NS_ERROR_FAILURE;
+    }
+
+    presShell->ReconstructFrames();
+
+    // If the printing was canceled or restarted with different data,
+    // let's stop doing this printing.
+    if (NS_WARN_IF(mPrt != printData)) {
+      return NS_ERROR_FAILURE;
+    }
+
+    // For all views except the first one, setup the root view.
+    // ??? Can there be multiple po for the top-level-document?
+    bool documentIsTopLevel = true;
+    if (i != 0) {
+      nsSize adjSize;
+      bool doReturn;
+      nsresult rv = SetRootView(po, doReturn, documentIsTopLevel, adjSize);
+
+      MOZ_ASSERT(!documentIsTopLevel, "How could this happen?");
+
+      if (NS_FAILED(rv) || doReturn) {
+        return rv;
+      }
+    }
+
+    presShell->FlushPendingNotifications(FlushType::Layout);
+
+    if (NS_WARN_IF(presShell->IsDestroying())) {
+      return NS_ERROR_FAILURE;
+    }
+
+    // If the printing was canceled or restarted with different data,
+    // let's stop doing this printing.
+    if (NS_WARN_IF(mPrt != printData)) {
+      return NS_ERROR_FAILURE;
+    }
+
+    nsresult rv = UpdateSelectionAndShrinkPrintObject(po, documentIsTopLevel);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+  return NS_OK;
+}
+
+//-------------------------------------------------------
+nsresult nsPrintJob::SetupToPrintContent() {
+  // This method may be called while DoCommonPrint() initializes the instance
+  // when its script blocker goes out of scope.  In such case, this cannot do
+  // its job as expected because some objects in mPrt have not been initialized
+  // yet but they are necessary.
+  // Note: it shouldn't be possible for mPrt->mPrintObject to be null; we check
+  // it for good measure (after we check its owner) before we start
+  // dereferencing it below.
+  if (NS_WARN_IF(!mPrt) || NS_WARN_IF(!mPrt->mPrintObject)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // If this is creating print preview, mPrt->mPrintObject->mPresContext and
+  // mPrt->mPrintObject->mPresShell need to be non-nullptr because this cannot
+  // initialize page sequence frame without them at end of this method since
+  // page sequence frame has already been destroyed or not been created yet.
+  if (mIsCreatingPrintPreview &&
+      (NS_WARN_IF(!mPrt->mPrintObject->mPresContext) ||
+       NS_WARN_IF(!mPrt->mPrintObject->mPresShell))) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // If this is printing some documents (not print-previewing the documents),
+  // mPrt->mPrintObject->mPresContext and mPrt->mPrintObject->mPresShell can be
+  // nullptr only when mPrt->mPrintObject->PrintingIsEnabled() is false.  E.g.,
+  // if the document has a <frameset> element and it's printing only content in
+  // a <frame> element or all <frame> elements separately.
+  MOZ_ASSERT(
+      (!mIsCreatingPrintPreview && !mPrt->mPrintObject->PrintingIsEnabled()) ||
+          (mPrt->mPrintObject->mPresContext && mPrt->mPrintObject->mPresShell),
+      "mPresContext and mPresShell shouldn't be nullptr when printing the "
+      "document or creating print-preview");
+
+  bool didReconstruction = false;
+
+  // This method works with mPrt->mPrintObject.  So, we need to guarantee that
+  // it won't be deleted in this method.  We achieve this by holding a strong
+  // local reference to mPrt, which in turn keeps mPrintObject alive.
+  RefPtr<nsPrintData> printData = mPrt;
+
+  // If some new content got loaded since the initial reflow rebuild
+  // everything.
+  if (mDidLoadDataForPrinting) {
+    nsresult rv = ReconstructAndReflow(DoSetPixelScale());
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return rv;
+    }
+    // If the printing was canceled or restarted with different data,
+    // let's stop doing this printing.
+    if (NS_WARN_IF(mPrt != printData)) {
+      return NS_ERROR_FAILURE;
+    }
+    didReconstruction = true;
+  }
+
+  // Here is where we figure out if extra reflow for shrinking the content
+  // is required.
+  // But skip this step if we are in PrintPreview
+  bool ppIsShrinkToFit = mPrtPreview && mPrtPreview->mShrinkToFit;
+  if (printData->mShrinkToFit && !ppIsShrinkToFit) {
+    // Now look for the PO that has the smallest percent for shrink to fit
+    if (printData->mPrintDocList.Length() > 1 &&
+        printData->mPrintObject->mFrameType == eFrameSet) {
+      nsPrintObject* smallestPO = FindSmallestSTF();
+      NS_ASSERTION(smallestPO, "There must always be an XMost PO!");
+      if (smallestPO) {
+        // Calc the shrinkage based on the entire content area
+        printData->mShrinkRatio = smallestPO->mShrinkRatio;
+      }
+    } else {
+      // Single document so use the Shrink as calculated for the PO
+      printData->mShrinkRatio = printData->mPrintObject->mShrinkRatio;
+    }
+
+    if (printData->mShrinkRatio < 0.998f) {
+      nsresult rv = ReconstructAndReflow(true);
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        return rv;
+      }
+      // If the printing was canceled or restarted with different data,
+      // let's stop doing this printing.
+      if (NS_WARN_IF(mPrt != printData)) {
+        return NS_ERROR_FAILURE;
+      }
+      didReconstruction = true;
+    }
+
+    if (MOZ_LOG_TEST(gPrintingLog, LogLevel::Debug)) {
+      float calcRatio = 0.0f;
+      if (printData->mPrintDocList.Length() > 1 &&
+          printData->mPrintObject->mFrameType == eFrameSet) {
+        nsPrintObject* smallestPO = FindSmallestSTF();
+        NS_ASSERTION(smallestPO, "There must always be an XMost PO!");
+        if (smallestPO) {
+          // Calc the shrinkage based on the entire content area
+          calcRatio = smallestPO->mShrinkRatio;
+        }
+      } else {
+        // Single document so use the Shrink as calculated for the PO
+        calcRatio = printData->mPrintObject->mShrinkRatio;
+      }
+      PR_PL(
+          ("*******************************************************************"
+           "*******\n"));
+      PR_PL(("STF Ratio is: %8.5f Effective Ratio: %8.5f Diff: %8.5f\n",
+             printData->mShrinkRatio, calcRatio,
+             printData->mShrinkRatio - calcRatio));
+      PR_PL(
+          ("*******************************************************************"
+           "*******\n"));
+    }
+  }
+
+  // If the frames got reconstructed and reflowed the number of pages might
+  // has changed.
+  if (didReconstruction) {
+    FirePrintPreviewUpdateEvent();
+    // If the printing was canceled or restarted with different data,
+    // let's stop doing this printing.
+    if (NS_WARN_IF(mPrt != printData)) {
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  DUMP_DOC_LIST(("\nAfter Reflow------------------------------------------"));
+  PR_PL(("\n"));
+  PR_PL(("-------------------------------------------------------\n"));
+  PR_PL(("\n"));
+
+  CalcNumPrintablePages(printData->mNumPrintablePages);
+
+  PR_PL(("--- Printing %d pages\n", printData->mNumPrintablePages));
+  DUMP_DOC_TREELAYOUT;
+
+  // Print listener setup...
+  printData->OnStartPrinting();
+
+  // If the printing was canceled or restarted with different data,
+  // let's stop doing this printing.
+  if (NS_WARN_IF(mPrt != printData)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsAutoString fileNameStr;
+  // check to see if we are printing to a file
+  bool isPrintToFile = false;
+  printData->mPrintSettings->GetPrintToFile(&isPrintToFile);
+  if (isPrintToFile) {
+    // On some platforms The BeginDocument needs to know the name of the file.
+    printData->mPrintSettings->GetToFileName(fileNameStr);
+  }
+
+  nsAutoString docTitleStr;
+  nsAutoString docURLStr;
+  GetDisplayTitleAndURL(
+      *printData->mPrintObject->mDocument, printData->mPrintSettings,
+      DocTitleDefault::eDocURLElseFallback, docTitleStr, docURLStr);
+
+  int32_t startPage = 1;
+  int32_t endPage = printData->mNumPrintablePages;
+
+  nsTArray<int32_t> ranges;
+  printData->mPrintSettings->GetPageRanges(ranges);
+  for (size_t i = 0; i < ranges.Length(); i += 2) {
+    startPage = std::max(1, std::min(startPage, ranges[i]));
+    endPage = std::min(printData->mNumPrintablePages,
+                       std::max(endPage, ranges[i + 1]));
+  }
+
+  nsresult rv = NS_OK;
+  // BeginDocument may pass back a FAILURE code
+  // i.e. On Windows, if you are printing to a file and hit "Cancel"
+  //      to the "File Name" dialog, this comes back as an error
+  // Don't start printing when regression test are executed
+  if (mIsDoingPrinting) {
+    rv = printData->mPrintDC->BeginDocument(docTitleStr, fileNameStr, startPage,
+                                            endPage);
+  }
+
+  if (mIsCreatingPrintPreview) {
+    // Copy docTitleStr and docURLStr to the pageSequenceFrame, to be displayed
+    // in the header
+    nsPageSequenceFrame* seqFrame =
+        printData->mPrintObject->mPresShell->GetPageSequenceFrame();
+    if (seqFrame) {
+      seqFrame->StartPrint(printData->mPrintObject->mPresContext,
+                           printData->mPrintSettings, docTitleStr, docURLStr);
+    }
+  }
+
+  PR_PL(("****************** Begin Document ************************\n"));
+
+  if (NS_FAILED(rv)) {
+    NS_WARNING_ASSERTION(rv == NS_ERROR_ABORT,
+                         "Failed to begin document for printing");
+    return rv;
+  }
+
+  // This will print the docshell document
+  // when it completes asynchronously in the DonePrintingSheets method
+  // it will check to see if there are more docshells to be printed and
+  // then PrintDocContent will be called again.
+
+  if (mIsDoingPrinting) {
+    PrintDocContent(printData->mPrintObject, rv);  // ignore return value
+  }
+
+  return rv;
+}
+
+//-------------------------------------------------------
+// Recursively reflow each sub-doc and then calc
+// all the frame locations of the sub-docs
+nsresult nsPrintJob::ReflowDocList(const UniquePtr<nsPrintObject>& aPO,
+                                   bool aSetPixelScale) {
+  NS_ENSURE_ARG_POINTER(aPO);
+
+  // Check to see if the subdocument's element has been hidden by the parent
+  // document
+  if (aPO->mParent && aPO->mParent->mPresShell) {
+    nsIFrame* frame =
+        aPO->mContent ? aPO->mContent->GetPrimaryFrame() : nullptr;
+    if (!frame || !frame->StyleVisibility()->IsVisible()) {
+      aPO->EnablePrinting(false);
+      aPO->mInvisible = true;
+      return NS_OK;
+    }
+  }
+
+  UpdateZoomRatio(aPO.get(), aSetPixelScale);
+
+  // Reflow the PO
+  MOZ_TRY(ReflowPrintObject(aPO));
+
+  for (const UniquePtr<nsPrintObject>& kid : aPO->mKids) {
+    MOZ_TRY(ReflowDocList(kid, aSetPixelScale));
+  }
+  return NS_OK;
+}
+
+void nsPrintJob::FirePrintPreviewUpdateEvent() {
+  // Dispatch the event only while in PrintPreview. When printing, there is no
+  // listener bound to this event and therefore no need to dispatch it.
+  if (mCreatedForPrintPreview && !mIsDoingPrinting) {
+    nsCOMPtr<nsIContentViewer> cv = do_QueryInterface(mDocViewerPrint);
+    (new AsyncEventDispatcher(cv->GetDocument(), u"printPreviewUpdate"_ns,
+                              CanBubble::eYes, ChromeOnlyDispatch::eYes))
+        ->RunDOMEventWhenSafe();
+  }
+}
+
+nsresult nsPrintJob::InitPrintDocConstruction(bool aHandleError) {
+  // Guarantee that mPrt->mPrintObject won't be deleted.  It's owned by mPrt.
+  // So, we should grab it with local variable.
+  RefPtr<nsPrintData> printData = mPrt;
+
+  if (NS_WARN_IF(!printData)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // Attach progressListener to catch network requests.
+  mDidLoadDataForPrinting = false;
+
+  {
+    AutoRestore<bool> restore{mDoingInitialReflow};
+    mDoingInitialReflow = true;
+
+    nsCOMPtr<nsIWebProgress> webProgress =
+        do_QueryInterface(printData->mPrintObject->mDocShell);
+    webProgress->AddProgressListener(static_cast<nsIWebProgressListener*>(this),
+                                     nsIWebProgress::NOTIFY_STATE_REQUEST);
+
+    MOZ_TRY(ReflowDocList(printData->mPrintObject, DoSetPixelScale()));
+
+    FirePrintPreviewUpdateEvent();
+  }
+
+  MaybeResumePrintAfterResourcesLoaded(aHandleError);
+  return NS_OK;
+}
+
+bool nsPrintJob::ShouldResumePrint() const {
+  if (mDoingInitialReflow) {
+    return false;
+  }
+  Document* doc = mPrt->mPrintObject->mDocument;
+  MOZ_ASSERT(doc);
+  NS_ENSURE_TRUE(doc, true);
+  nsCOMPtr<nsILoadGroup> lg = doc->GetDocumentLoadGroup();
+  NS_ENSURE_TRUE(lg, true);
+  bool pending = false;
+  nsresult rv = lg->IsPending(&pending);
+  NS_ENSURE_SUCCESS(rv, true);
+  return !pending;
+}
+
+nsresult nsPrintJob::MaybeResumePrintAfterResourcesLoaded(
+    bool aCleanupOnError) {
+  if (!ShouldResumePrint()) {
+    mDidLoadDataForPrinting = true;
+    return NS_OK;
+  }
+  // If Destroy() has already been called, mPtr is nullptr.  Then, the instance
+  // needs to do nothing anymore in this method.
+  // Note: it shouldn't be possible for mPrt->mPrintObject to be null; we
+  // just check it for good measure, as we check its owner.
+  // Note: it shouldn't be possible for mPrt->mPrintObject->mDocShell to be
+  // null; we just check it for good measure, as we check its owner.
+  if (!mPrt || NS_WARN_IF(!mPrt->mPrintObject) ||
+      NS_WARN_IF(!mPrt->mPrintObject->mDocShell)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsCOMPtr<nsIWebProgress> webProgress =
+      do_QueryInterface(mPrt->mPrintObject->mDocShell);
+
+  webProgress->RemoveProgressListener(
+      static_cast<nsIWebProgressListener*>(this));
+
+  nsresult rv;
+  if (mIsDoingPrinting) {
+    rv = DocumentReadyForPrinting();
+  } else {
+    rv = FinishPrintPreview();
+  }
+
+  /* cleaup on failure + notify user */
+  if (aCleanupOnError && NS_FAILED(rv)) {
+    NS_WARNING_ASSERTION(rv == NS_ERROR_ABORT,
+                         "nsPrintJob::ResumePrintAfterResourcesLoaded failed");
+    CleanupOnFailure(rv, !mIsDoingPrinting);
+  }
+
+  return rv;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIWebProgressListener
+
+MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHODIMP
+nsPrintJob::OnStateChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
+                          uint32_t aStateFlags, nsresult aStatus) {
+  if (aStateFlags & STATE_STOP) {
+    // If all resources are loaded, then finish and reflow.
+    MaybeResumePrintAfterResourcesLoaded(/* aCleanupOnError */ true);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPrintJob::OnProgressChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
+                             int32_t aCurSelfProgress, int32_t aMaxSelfProgress,
+                             int32_t aCurTotalProgress,
+                             int32_t aMaxTotalProgress) {
+  MOZ_ASSERT_UNREACHABLE("notification excluded in AddProgressListener(...)");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPrintJob::OnLocationChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
+                             nsIURI* aLocation, uint32_t aFlags) {
+  MOZ_ASSERT_UNREACHABLE("notification excluded in AddProgressListener(...)");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPrintJob::OnStatusChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
+                           nsresult aStatus, const char16_t* aMessage) {
+  MOZ_ASSERT_UNREACHABLE("notification excluded in AddProgressListener(...)");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPrintJob::OnSecurityChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
+                             uint32_t aState) {
+  MOZ_ASSERT_UNREACHABLE("notification excluded in AddProgressListener(...)");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPrintJob::OnContentBlockingEvent(nsIWebProgress* aWebProgress,
+                                   nsIRequest* aRequest, uint32_t aEvent) {
+  MOZ_ASSERT_UNREACHABLE("notification excluded in AddProgressListener(...)");
+  return NS_OK;
+}
+
+//-------------------------------------------------------
+
+void nsPrintJob::UpdateZoomRatio(nsPrintObject* aPO, bool aSetPixelScale) {
+  // Here is where we set the shrinkage value into the DC
+  // and this is what actually makes it shrink
+  if (aSetPixelScale && aPO->mFrameType != eIFrame) {
+    // Round down
+    aPO->mZoomRatio = mPrt->mPrintSettings->GetPrintSelectionOnly()
+                          ? aPO->mShrinkRatio - 0.005f
+                          : mPrt->mShrinkRatio - 0.005f;
+  } else if (!mPrt->mShrinkToFit) {
+    double scaling;
+    mPrt->mPrintSettings->GetScaling(&scaling);
+    aPO->mZoomRatio = float(scaling);
+  }
+}
+
+nsresult nsPrintJob::UpdateSelectionAndShrinkPrintObject(
+    nsPrintObject* aPO, bool aDocumentIsTopLevel) {
+  PresShell* displayPresShell = aPO->mDocShell->GetPresShell();
+  // Transfer Selection Ranges to the new Print PresShell
+  RefPtr<Selection> selection, selectionPS;
+  // It's okay if there is no display shell, just skip copying the selection
+  if (displayPresShell) {
+    selection = displayPresShell->GetCurrentSelection(SelectionType::eNormal);
+  }
+  selectionPS = aPO->mPresShell->GetCurrentSelection(SelectionType::eNormal);
+
+  // Reset all existing selection ranges that might have been added by calling
+  // this function before.
+  if (selectionPS) {
+    selectionPS->RemoveAllRanges(IgnoreErrors());
+  }
+  if (selection && selectionPS) {
+    int32_t cnt = selection->RangeCount();
+    int32_t inx;
+    for (inx = 0; inx < cnt; ++inx) {
+      const RefPtr<nsRange> range{selection->GetRangeAt(inx)};
+      selectionPS->AddRangeAndSelectFramesAndNotifyListeners(*range,
+                                                             IgnoreErrors());
+    }
+  }
+
+  // If we are trying to shrink the contents to fit on the page
+  // we must first locate the "pageContent" frame
+  // Then we walk the frame tree and look for the "xmost" frame
+  // this is the frame where the right-hand side of the frame extends
+  // the furthest
+  if (mPrt->mShrinkToFit && aDocumentIsTopLevel) {
+    nsPageSequenceFrame* pageSeqFrame = aPO->mPresShell->GetPageSequenceFrame();
+    NS_ENSURE_STATE(pageSeqFrame);
+    aPO->mShrinkRatio = pageSeqFrame->GetSTFPercent();
+    // Limit the shrink-to-fit scaling for some text-ish type of documents.
+    nsAutoString contentType;
+    aPO->mPresShell->GetDocument()->GetContentType(contentType);
+    if (contentType.EqualsLiteral("application/xhtml+xml") ||
+        StringBeginsWith(contentType, u"text/"_ns)) {
+      int32_t limitPercent =
+          Preferences::GetInt("print.shrink-to-fit.scale-limit-percent", 20);
+      limitPercent = std::max(0, limitPercent);
+      limitPercent = std::min(100, limitPercent);
+      float minShrinkRatio = float(limitPercent) / 100;
+      aPO->mShrinkRatio = std::max(aPO->mShrinkRatio, minShrinkRatio);
+    }
+  }
+  return NS_OK;
+}
+
+bool nsPrintJob::DoSetPixelScale() {
+  // This is an Optimization
+  // If we are in PP then we already know all the shrinkage information
+  // so just transfer it to the PrintData and we will skip the extra shrinkage
+  // reflow
+  //
+  // doSetPixelScale tells Reflow whether to set the shrinkage value into the DC
+  // The first time we do not want to do this, the second time through we do
+  bool doSetPixelScale = false;
+  bool ppIsShrinkToFit = mPrtPreview && mPrtPreview->mShrinkToFit;
+  if (ppIsShrinkToFit) {
+    mPrt->mShrinkRatio = mPrtPreview->mShrinkRatio;
+    doSetPixelScale = true;
+  }
+  return doSetPixelScale;
+}
+
+nsView* nsPrintJob::GetParentViewForRoot() {
+  if (mIsCreatingPrintPreview) {
+    if (nsCOMPtr<nsIContentViewer> cv = do_QueryInterface(mDocViewerPrint)) {
+      return cv->FindContainerView();
+    }
+  }
+  return nullptr;
+}
+
+nsresult nsPrintJob::SetRootView(nsPrintObject* aPO, bool& doReturn,
+                                 bool& documentIsTopLevel, nsSize& adjSize) {
+  bool canCreateScrollbars = true;
+
+  nsView* rootView;
+  nsView* parentView = nullptr;
+
+  doReturn = false;
+
+  if (aPO->mParent && aPO->mParent->PrintingIsEnabled()) {
+    nsIFrame* frame =
+        aPO->mContent ? aPO->mContent->GetPrimaryFrame() : nullptr;
+    // Without a frame, this document can't be displayed; therefore, there is no
+    // point to reflowing it
+    if (!frame) {
+      aPO->EnablePrinting(false);
+      doReturn = true;
+      return NS_OK;
+    }
+
+    // XXX If printing supported printing document hierarchies with non-constant
+    // zoom this would be wrong as we use the same mPrt->mPrintDC for all
+    // subdocuments.
+    adjSize = frame->GetContentRect().Size();
+    documentIsTopLevel = false;
+    // presshell exists because parent is printable
+
+    // the top nsPrintObject's widget will always have scrollbars
+    if (frame && frame->IsSubDocumentFrame()) {
+      nsView* view = frame->GetView();
+      NS_ENSURE_TRUE(view, NS_ERROR_FAILURE);
+      view = view->GetFirstChild();
+      NS_ENSURE_TRUE(view, NS_ERROR_FAILURE);
+      parentView = view;
+      canCreateScrollbars = false;
+    }
+  } else {
+    nscoord pageWidth, pageHeight;
+    mPrt->mPrintDC->GetDeviceSurfaceDimensions(pageWidth, pageHeight);
+    adjSize = nsSize(pageWidth, pageHeight);
+    documentIsTopLevel = true;
+    parentView = GetParentViewForRoot();
+  }
+
+  if (aPO->mViewManager->GetRootView()) {
+    // Reuse the root view that is already on the root frame.
+    rootView = aPO->mViewManager->GetRootView();
+    // Remove it from its existing parent if necessary
+    aPO->mViewManager->RemoveChild(rootView);
+    rootView->SetParent(parentView);
+  } else {
+    // Create a child window of the parent that is our "root view/window"
+    nsRect tbounds = nsRect(nsPoint(0, 0), adjSize);
+    rootView = aPO->mViewManager->CreateView(tbounds, parentView);
+    NS_ENSURE_TRUE(rootView, NS_ERROR_OUT_OF_MEMORY);
+  }
+
+  if (mIsCreatingPrintPreview && documentIsTopLevel) {
+    aPO->mPresContext->SetPaginatedScrolling(canCreateScrollbars);
+  }
+
+  // Setup hierarchical relationship in view manager
+  aPO->mViewManager->SetRootView(rootView);
+
+  return NS_OK;
+}
+
+// Reflow a nsPrintObject
+nsresult nsPrintJob::ReflowPrintObject(const UniquePtr<nsPrintObject>& aPO) {
+  NS_ENSURE_STATE(aPO);
+
+  if (!aPO->PrintingIsEnabled()) {
+    return NS_OK;
+  }
+
+  NS_ASSERTION(!aPO->mPresContext, "Recreating prescontext");
+
+  // Guarantee that mPrt and the objects it owns won't be deleted in this method
+  // because it might be cleared if other modules called from here may fire
+  // events, notifying observers and/or listeners.
+  RefPtr<nsPrintData> printData = mPrt;
+
+  // create the PresContext
+  nsPresContext::nsPresContextType type =
+      mIsCreatingPrintPreview ? nsPresContext::eContext_PrintPreview
+                              : nsPresContext::eContext_Print;
+  const bool shouldBeRoot =
+      (!aPO->mParent || !aPO->mParent->PrintingIsEnabled()) &&
+      !GetParentViewForRoot();
+  aPO->mPresContext = shouldBeRoot ? new nsRootPresContext(aPO->mDocument, type)
+                                   : new nsPresContext(aPO->mDocument, type);
+  aPO->mPresContext->SetPrintSettings(printData->mPrintSettings);
+
+  // init it with the DC
+  MOZ_TRY(aPO->mPresContext->Init(printData->mPrintDC));
+
+  aPO->mViewManager = new nsViewManager();
+
+  MOZ_TRY(aPO->mViewManager->Init(printData->mPrintDC));
+
+  aPO->mPresShell =
+      aPO->mDocument->CreatePresShell(aPO->mPresContext, aPO->mViewManager);
+  if (!aPO->mPresShell) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // If we're printing selection then remove the nonselected nodes from our
+  // cloned document.
+  if (printData->mPrintSettings->GetPrintSelectionOnly()) {
+    // If we fail to remove the nodes then we should fail to print, because if
+    // the user was trying to print a small selection from a large document,
+    // sending the whole document to a real printer would be very frustrating.
+    MOZ_TRY(DeleteNonSelectedNodes(*aPO->mDocument));
+  }
+
+  bool doReturn = false;
+  bool documentIsTopLevel = false;
+  nsSize adjSize;
+
+  nsresult rv = SetRootView(aPO.get(), doReturn, documentIsTopLevel, adjSize);
+
+  if (NS_FAILED(rv) || doReturn) {
+    return rv;
+  }
+
+  PR_PL(("In DV::ReflowPrintObject PO: %p pS: %p (%9s) Setting w,h to %d,%d\n",
+         aPO.get(), aPO->mPresShell.get(), gFrameTypesStr[aPO->mFrameType],
+         adjSize.width, adjSize.height));
+
+  aPO->mPresShell->BeginObservingDocument();
+
+  // Here, we inform nsPresContext of the page size. Note that 'adjSize' is
+  // *usually* the page size, but we need to check. Strictly speaking, adjSize
+  // is the *device output size*, which is really the dimensions of a "sheet"
+  // rather than a "page" (an important distinction in an N-pages-per-sheet
+  // scenario). For some pages-per-sheet values, the pages are orthogonal to
+  // the sheet; we adjust for that here by swapping the width with the height.
+  nsSize pageSize = adjSize;
+  if (printData->mPrintSettings->HasOrthogonalSheetsAndPages()) {
+    std::swap(pageSize.width, pageSize.height);
+  }
+
+  aPO->mPresContext->SetPageSize(pageSize);
+
+  int32_t p2a = aPO->mPresContext->DeviceContext()->AppUnitsPerDevPixel();
+  if (documentIsTopLevel && mIsCreatingPrintPreview) {
+    if (nsCOMPtr<nsIContentViewer> cv = do_QueryInterface(mDocViewerPrint)) {
+      // If we're print-previewing and the top level document, use the bounds
+      // from our doc viewer. Page bounds is not what we want.
+      nsIntRect bounds;
+      cv->GetBounds(bounds);
+      adjSize = nsSize(bounds.width * p2a, bounds.height * p2a);
+    }
+  }
+  aPO->mPresContext->SetVisibleArea(nsRect(nsPoint(), adjSize));
+  aPO->mPresContext->SetIsRootPaginatedDocument(documentIsTopLevel);
+  aPO->mPresContext->SetPageScale(aPO->mZoomRatio);
+  // Calculate scale factor from printer to screen
+  float printDPI = float(AppUnitsPerCSSInch()) / float(p2a);
+  aPO->mPresContext->SetPrintPreviewScale(mScreenDPI / printDPI);
+
+  if (mIsCreatingPrintPreview && documentIsTopLevel) {
+    mDocViewerPrint->SetPrintPreviewPresentation(
+        aPO->mViewManager, aPO->mPresContext, aPO->mPresShell.get());
+  }
+
+  MOZ_TRY(aPO->mPresShell->Initialize());
+  NS_ASSERTION(aPO->mPresShell, "Presshell should still be here");
+
+  // Process the reflow event Initialize posted
+  RefPtr<PresShell> presShell = aPO->mPresShell;
+  presShell->FlushPendingNotifications(FlushType::Layout);
+
+  MOZ_TRY(UpdateSelectionAndShrinkPrintObject(aPO.get(), documentIsTopLevel));
+
+#ifdef EXTENDED_DEBUG_PRINTING
+  if (MOZ_LOG_TEST(gPrintingLog, DUMP_LAYOUT_LEVEL)) {
+    nsAutoCString docStr;
+    nsAutoCString urlStr;
+    GetDocTitleAndURL(aPO, docStr, urlStr);
+    char filename[256];
+    sprintf(filename, "print_dump_%d.txt", gDumpFileNameCnt++);
+    // Dump all the frames and view to a a file
+    FILE* fd = fopen(filename, "w");
+    if (fd) {
+      nsIFrame* theRootFrame = aPO->mPresShell->GetRootFrame();
+      fprintf(fd, "Title: %s\n", docStr.get());
+      fprintf(fd, "URL:   %s\n", urlStr.get());
+      fprintf(fd, "--------------- Frames ----------------\n");
+      // RefPtr<gfxContext> renderingContext =
+      //  printData->mPrintDocDC->CreateRenderingContext();
+      RootFrameList(aPO->mPresContext, fd, 0);
+      // DumpFrames(fd, aPO->mPresContext, renderingContext, theRootFrame, 0);
+      fprintf(fd, "---------------------------------------\n\n");
+      fprintf(fd, "--------------- Views From Root Frame----------------\n");
+      nsView* v = theRootFrame->GetView();
+      if (v) {
+        v->List(fd);
+      } else {
+        printf("View is null!\n");
+      }
+      if (aPO->mDocShell) {
+        fprintf(fd, "--------------- All Views ----------------\n");
+        DumpViews(aPO->mDocShell, fd);
+        fprintf(fd, "---------------------------------------\n\n");
+      }
+      fclose(fd);
+    }
+  }
+#endif
+
+  return NS_OK;
+}
+
+//-------------------------------------------------------
+// Figure out how many documents and how many total pages we are printing
+void nsPrintJob::CalcNumPrintablePages(int32_t& aNumPages) {
+  aNumPages = 0;
+  // Count the number of printable documents
+  // and printable pages
+  for (uint32_t i = 0; i < mPrt->mPrintDocList.Length(); i++) {
+    nsPrintObject* po = mPrt->mPrintDocList.ElementAt(i);
+    NS_ASSERTION(po, "nsPrintObject can't be null!");
+    // Note: The po->mPresContext null-check below is necessary, because it's
+    // possible po->mPresContext might never have been set.  (e.g., if
+    // PrintingIsEnabled() returns false, ReflowPrintObject bails before setting
+    // mPresContext)
+    if (po->mPresContext && po->mPresContext->IsRootPaginatedDocument()) {
+      nsPageSequenceFrame* seqFrame = po->mPresShell->GetPageSequenceFrame();
+      if (seqFrame) {
+        aNumPages += seqFrame->PrincipalChildList().GetLength();
+      }
+    }
+  }
+}
+
+//-----------------------------------------------------------------
+//-- Done: Reflow Methods
+//-----------------------------------------------------------------
+
+//-----------------------------------------------------------------
+//-- Section: Printing Methods
+//-----------------------------------------------------------------
+
+//-------------------------------------------------------
+// Called for each DocShell that needs to be printed
+bool nsPrintJob::PrintDocContent(const UniquePtr<nsPrintObject>& aPO,
+                                 nsresult& aStatus) {
+  NS_ASSERTION(aPO, "Pointer is null!");
+  aStatus = NS_OK;
+
+  if (!aPO->mHasBeenPrinted && aPO->PrintingIsEnabled()) {
+    aStatus = DoPrint(aPO);
+    return true;
+  }
+
+  // If |aPO->mHasBeenPrinted| is true,
+  // the kids frames are already processed in |PrintPage|.
+  // XXX This should be removed. Since bug 1552785 it has no longer been
+  // possible for us to have to print multiple subdocuments consecutively.
+  if (!aPO->mHasBeenPrinted && !aPO->mInvisible) {
+    for (const UniquePtr<nsPrintObject>& po : aPO->mKids) {
+      bool printed = PrintDocContent(po, aStatus);
+      if (printed || NS_FAILED(aStatus)) {
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
+// A helper struct to aid with DeleteNonSelectedNodes.
+struct MOZ_STACK_CLASS SelectionRangeState {
+  explicit SelectionRangeState(RefPtr<Selection> aSelection)
+      : mSelection(std::move(aSelection)) {
+    MOZ_ASSERT(mSelection);
+    MOZ_ASSERT(!mSelection->RangeCount());
+  }
+
+  // Selects all the nodes that are _not_ included in a given set of ranges.
+  MOZ_CAN_RUN_SCRIPT void SelectComplementOf(Span<const RefPtr<nsRange>>);
+  // Removes the selected ranges from the document.
+  MOZ_CAN_RUN_SCRIPT void RemoveSelectionFromDocument();
+
+ private:
+  struct Position {
+    nsINode* mNode;
+    uint32_t mOffset;
+  };
+
+  MOZ_CAN_RUN_SCRIPT void SelectRange(nsRange*);
+  MOZ_CAN_RUN_SCRIPT void SelectNodesExcept(const Position& aStart,
+                                            const Position& aEnd);
+  MOZ_CAN_RUN_SCRIPT void SelectNodesExceptInSubtree(const Position& aStart,
+                                                     const Position& aEnd);
+
+  // A map from subtree root (document or shadow root) to the start position of
+  // the non-selected content (so far).
+  nsDataHashtable<nsPtrHashKey<nsINode>, Position> mPositions;
+
+  // The selection we're adding the ranges to.
+  const RefPtr<Selection> mSelection;
+};
+
+void SelectionRangeState::SelectComplementOf(
+    Span<const RefPtr<nsRange>> aRanges) {
+  for (const auto& range : aRanges) {
+    auto start = Position{range->GetStartContainer(), range->StartOffset()};
+    auto end = Position{range->GetEndContainer(), range->EndOffset()};
+    SelectNodesExcept(start, end);
+  }
+}
+
+void SelectionRangeState::SelectRange(nsRange* aRange) {
+  if (aRange && !aRange->Collapsed()) {
+    mSelection->AddRangeAndSelectFramesAndNotifyListeners(*aRange,
+                                                          IgnoreErrors());
+  }
+}
+
+void SelectionRangeState::SelectNodesExcept(const Position& aStart,
+                                            const Position& aEnd) {
+  SelectNodesExceptInSubtree(aStart, aEnd);
+  if (auto* shadow = ShadowRoot::FromNode(aStart.mNode->SubtreeRoot())) {
+    auto* host = shadow->Host();
+    SelectNodesExcept(Position{host, 0}, Position{host, host->GetChildCount()});
+  } else {
+    MOZ_ASSERT(aStart.mNode->IsInUncomposedDoc());
+  }
+}
+
+void SelectionRangeState::SelectNodesExceptInSubtree(const Position& aStart,
+                                                     const Position& aEnd) {
+  static constexpr auto kEllipsis = u"\x2026"_ns;
+
+  nsINode* root = aStart.mNode->SubtreeRoot();
+  auto& start = mPositions.LookupForAdd(root).OrInsert([&] {
+    return Position{root, 0};
+  });
+
+  bool ellipsizedStart = false;
+  if (auto* text = Text::FromNode(aStart.mNode)) {
+    if (start.mNode != text && aStart.mOffset &&
+        aStart.mOffset < text->Length()) {
+      text->InsertData(aStart.mOffset, kEllipsis, IgnoreErrors());
+      ellipsizedStart = true;
+    }
+  }
+
+  RefPtr<nsRange> range = nsRange::Create(
+      start.mNode, start.mOffset, aStart.mNode, aStart.mOffset, IgnoreErrors());
+  SelectRange(range);
+
+  start = aEnd;
+
+  // If we added an ellipsis at the start and the end position was relative to
+  // the same node account for it here.
+  if (ellipsizedStart && aStart.mNode == aEnd.mNode) {
+    start.mOffset += kEllipsis.Length();
+  }
+
+  // If the end is mid text then add an ellipsis.
+  if (auto* text = Text::FromNode(start.mNode)) {
+    if (start.mOffset && start.mOffset < text->Length()) {
+      text->InsertData(start.mOffset, kEllipsis, IgnoreErrors());
+      start.mOffset += kEllipsis.Length();
+    }
+  }
+}
+
+void SelectionRangeState::RemoveSelectionFromDocument() {
+  for (auto& entry : mPositions) {
+    const Position& pos = entry.GetData();
+    nsINode* root = entry.GetKey();
+    RefPtr<nsRange> range = nsRange::Create(
+        pos.mNode, pos.mOffset, root, root->GetChildCount(), IgnoreErrors());
+    SelectRange(range);
+  }
+  mSelection->DeleteFromDocument(IgnoreErrors());
+}
+
+/**
+ * Builds the complement set of ranges and adds those to the selection.
+ * Deletes all of the nodes contained in the complement set of ranges
+ * leaving behind only nodes that were originally selected.
+ * Adds ellipses to a selected node's text if text is truncated by a range.
+ * This is used to implement the "Print Selection Only" user interface option.
+ */
+MOZ_CAN_RUN_SCRIPT_BOUNDARY static nsresult DeleteNonSelectedNodes(
+    Document& aDoc) {
+  MOZ_ASSERT(aDoc.IsStaticDocument());
+  const auto* printRanges = static_cast<nsTArray<RefPtr<nsRange>>*>(
+      aDoc.GetProperty(nsGkAtoms::printselectionranges));
+  if (!printRanges) {
+    return NS_OK;
+  }
+
+  PresShell* presShell = aDoc.GetPresShell();
+  NS_ENSURE_STATE(presShell);
+  RefPtr<Selection> selection =
+      presShell->GetCurrentSelection(SelectionType::eNormal);
+  NS_ENSURE_STATE(selection);
+
+  SelectionRangeState state(std::move(selection));
+  state.SelectComplementOf(*printRanges);
+  state.RemoveSelectionFromDocument();
+  return NS_OK;
+}
+
+//-------------------------------------------------------
+nsresult nsPrintJob::DoPrint(const UniquePtr<nsPrintObject>& aPO) {
+  PR_PL(("\n"));
+  PR_PL(("**************************** %s ****************************\n",
+         gFrameTypesStr[aPO->mFrameType]));
+  PR_PL(("****** In DV::DoPrint   PO: %p \n", aPO.get()));
+
+  PresShell* poPresShell = aPO->mPresShell;
+  nsPresContext* poPresContext = aPO->mPresContext;
+
+  NS_ASSERTION(poPresContext, "PrintObject has not been reflowed");
+  NS_ASSERTION(poPresContext->Type() != nsPresContext::eContext_PrintPreview,
+               "How did this context end up here?");
+
+  // Guarantee that mPrt and the objects it owns won't be deleted in this method
+  // because it might be cleared if other modules called from here may fire
+  // events, notifying observers and/or listeners.
+  RefPtr<nsPrintData> printData = mPrt;
+
+  if (printData->mPrintProgressParams) {
+    SetURLAndTitleOnProgressParams(aPO, printData->mPrintProgressParams);
+  }
+
+  {
+    // Ask the page sequence frame to print all the pages
+    nsPageSequenceFrame* seqFrame = poPresShell->GetPageSequenceFrame();
+    MOZ_ASSERT(seqFrame, "no page sequence frame");
+
+    // We are done preparing for printing, so we can turn this off
+    printData->mPreparingForPrint = false;
+
+#ifdef EXTENDED_DEBUG_PRINTING
+    nsIFrame* rootFrame = poPresShell->GetRootFrame();
+    if (aPO->PrintingIsEnabled()) {
+      nsAutoCString docStr;
+      nsAutoCString urlStr;
+      GetDocTitleAndURL(aPO, docStr, urlStr);
+      DumpLayoutData(docStr.get(), urlStr.get(), poPresContext,
+                     printData->mPrintDC, rootFrame, aPO->mDocShell, nullptr);
+    }
+#endif
+
+    if (!printData->mPrintSettings) {
+      // not sure what to do here!
+      SetIsPrinting(false);
+      return NS_ERROR_FAILURE;
+    }
+
+    nsAutoString docTitleStr;
+    nsAutoString docURLStr;
+    GetDisplayTitleAndURL(*aPO->mDocument, mPrt->mPrintSettings,
+                          DocTitleDefault::eFallback, docTitleStr, docURLStr);
+
+    if (!seqFrame) {
+      SetIsPrinting(false);
+      return NS_ERROR_FAILURE;
+    }
+
+    // For telemetry, get paper size being used; convert the dimensions to
+    // points and ensure they reflect portrait orientation.
+    nsIPrintSettings* settings = printData->mPrintSettings;
+    double paperWidth, paperHeight;
+    settings->GetPaperWidth(&paperWidth);
+    settings->GetPaperHeight(&paperHeight);
+    int16_t sizeUnit;
+    settings->GetPaperSizeUnit(&sizeUnit);
+    switch (sizeUnit) {
+      case nsIPrintSettings::kPaperSizeInches:
+        paperWidth *= 72.0;
+        paperHeight *= 72.0;
+        break;
+      case nsIPrintSettings::kPaperSizeMillimeters:
+        paperWidth *= 72.0 / 25.4;
+        paperHeight *= 72.0 / 25.4;
+        break;
+      default:
+        MOZ_ASSERT_UNREACHABLE("unknown paper size unit");
+        break;
+    }
+    if (paperWidth > paperHeight) {
+      std::swap(paperWidth, paperHeight);
+    }
+    // Use the paper size to build a Telemetry Scalar key.
+    nsString key;
+    key.AppendInt(int32_t(NS_round(paperWidth)));
+    key.Append(u"x");
+    key.AppendInt(int32_t(NS_round(paperHeight)));
+    Telemetry::ScalarAdd(Telemetry::ScalarID::PRINTING_PAPER_SIZE, key, 1);
+
+    mPageSeqFrame = seqFrame;
+    seqFrame->StartPrint(poPresContext, settings, docTitleStr, docURLStr);
+
+    // Schedule Page to Print
+    PR_PL(("Scheduling Print of PO: %p (%s) \n", aPO.get(),
+           gFrameTypesStr[aPO->mFrameType]));
+    StartPagePrintTimer(aPO);
+  }
+
+  return NS_OK;
+}
+
+//---------------------------------------------------------------------
+void nsPrintJob::SetURLAndTitleOnProgressParams(
+    const UniquePtr<nsPrintObject>& aPO, nsIPrintProgressParams* aParams) {
+  NS_ASSERTION(aPO, "Must have valid nsPrintObject");
+  NS_ASSERTION(aParams, "Must have valid nsIPrintProgressParams");
+
+  if (!aPO || !aPO->mDocShell || !aParams) {
+    return;
+  }
+  const uint32_t kTitleLength = 64;
+
+  nsAutoString docTitleStr;
+  nsAutoString docURLStr;
+  GetDisplayTitleAndURL(*aPO->mDocument, mPrt->mPrintSettings,
+                        DocTitleDefault::eDocURLElseFallback, docTitleStr,
+                        docURLStr);
+
+  // Make sure the Titles & URLS don't get too long for the progress dialog
+  EllipseLongString(docTitleStr, kTitleLength, false);
+  EllipseLongString(docURLStr, kTitleLength, true);
+
+  aParams->SetDocTitle(docTitleStr);
+  aParams->SetDocURL(docURLStr);
+}
+
+//---------------------------------------------------------------------
+void nsPrintJob::EllipseLongString(nsAString& aStr, const uint32_t aLen,
+                                   bool aDoFront) {
+  // Make sure the URLS don't get too long for the progress dialog
+  if (aLen >= 3 && aStr.Length() > aLen) {
+    if (aDoFront) {
+      nsAutoString newStr;
+      newStr.AppendLiteral("...");
+      newStr += Substring(aStr, aStr.Length() - (aLen - 3), aLen - 3);
+      aStr = newStr;
+    } else {
+      aStr.SetLength(aLen - 3);
+      aStr.AppendLiteral("...");
+    }
+  }
+}
+
+//-------------------------------------------------------
+bool nsPrintJob::PrePrintSheet() {
+  NS_ASSERTION(mPageSeqFrame.IsAlive(), "mPageSeqFrame is not alive!");
+  NS_ASSERTION(mPrt, "mPrt is null!");
+
+  // Although these should NEVER be nullptr
+  // This is added insurance, to make sure we don't crash in optimized builds
+  if (!mPrt || !mPageSeqFrame.IsAlive()) {
+    return true;  // means we are done preparing the sheet.
+  }
+
+  // Guarantee that mPrt won't be deleted during a call of
+  // FirePrintingErrorEvent().
+  RefPtr<nsPrintData> printData = mPrt;
+
+  // Check setting to see if someone request it be cancelled
+  bool isCancelled = false;
+  printData->mPrintSettings->GetIsCancelled(&isCancelled);
+  if (isCancelled) return true;
+
+  // Ask mPageSeqFrame if the sheet is ready to be printed.
+  // If the sheet doesn't get printed at all, the |done| will be |true|.
+  bool done = false;
+  nsPageSequenceFrame* pageSeqFrame = do_QueryFrame(mPageSeqFrame.GetFrame());
+  nsresult rv = pageSeqFrame->PrePrintNextSheet(mPagePrintTimer, &done);
+  if (NS_FAILED(rv)) {
+    // ??? ::PrintSheet doesn't set |printData->mIsAborted = true| if
+    // rv != NS_ERROR_ABORT, but I don't really understand why this should be
+    // the right thing to do?  Shouldn't |printData->mIsAborted| set to true
+    // all the time if something went wrong?
+    if (rv != NS_ERROR_ABORT) {
+      FirePrintingErrorEvent(rv);
+      printData->mIsAborted = true;
+    }
+    done = true;
+  }
+  return done;
+}
+
+bool nsPrintJob::PrintSheet(nsPrintObject* aPO, bool& aInRange) {
+  NS_ASSERTION(aPO, "aPO is null!");
+  NS_ASSERTION(mPageSeqFrame.IsAlive(), "mPageSeqFrame is not alive!");
+  NS_ASSERTION(mPrt, "mPrt is null!");
+
+  // XXXdholbert Nowadays, this function doesn't need to concern itself with
+  // page ranges -- page-range handling is now handled when we reflow our
+  // PrintedSheetFrames, and all PrintedSheetFrames are "in-range" and should
+  // be printed. So this outparam is unconditionally true. Bug 1669815 is filed
+  // on removing it entirely.
+  aInRange = true;
+
+  // Although these should NEVER be nullptr
+  // This is added insurance, to make sure we don't crash in optimized builds
+  if (!mPrt || !aPO || !mPageSeqFrame.IsAlive()) {
+    FirePrintingErrorEvent(NS_ERROR_FAILURE);
+    return true;  // means we are done printing
+  }
+
+  // Guarantee that mPrt won't be deleted during a call of
+  // nsPrintData::DoOnProgressChange() which runs some listeners,
+  // which may clear (& might otherwise destroy).
+  RefPtr<nsPrintData> printData = mPrt;
+
+  PR_PL(("-----------------------------------\n"));
+  PR_PL(("------ In DV::PrintSheet PO: %p (%s)\n", aPO,
+         gFrameTypesStr[aPO->mFrameType]));
+
+  // Check setting to see if someone request it be cancelled
+  bool isCancelled = false;
+  printData->mPrintSettings->GetIsCancelled(&isCancelled);
+  if (isCancelled || printData->mIsAborted) {
+    return true;
+  }
+
+  nsPageSequenceFrame* pageSeqFrame = do_QueryFrame(mPageSeqFrame.GetFrame());
+  const uint32_t sheetIdx = pageSeqFrame->GetCurrentSheetIdx();
+  const uint32_t numSheets = pageSeqFrame->PrincipalChildList().GetLength();
+
+  PR_PL(("****** Printing sheet index %d of %d sheets(s)\n", sheetIdx,
+         numSheets));
+
+  MOZ_ASSERT(numSheets > 0, "print operations must have at least 1 sheet");
+  MOZ_ASSERT(sheetIdx < numSheets,
+             "sheetIdx shouldn't be allowed to go out of bounds");
+  printData->DoOnProgressChange(sheetIdx, numSheets, false, 0);
+  if (NS_WARN_IF(mPrt != printData)) {
+    // If current printing is canceled or new print is started, let's return
+    // true to notify the caller of current printing is done.
+    return true;
+  }
+
+  if (XRE_IsParentProcess() && !printData->mPrintDC->IsSyncPagePrinting()) {
+    mPagePrintTimer->WaitForRemotePrint();
+  }
+
+  // Print the sheet
+  // if a print job was cancelled externally, an EndPage or BeginPage may
+  // fail and the failure is passed back here.
+  // Returning true means we are done printing.
+  //
+  // When rv == NS_ERROR_ABORT, it means we want out of the
+  // print job without displaying any error messages
+  nsresult rv = pageSeqFrame->PrintNextSheet();
+  if (NS_FAILED(rv)) {
+    if (rv != NS_ERROR_ABORT) {
+      FirePrintingErrorEvent(rv);
+      printData->mIsAborted = true;
+    }
+    return true;
+  }
+
+  pageSeqFrame->DoPageEnd();
+
+  // If we just printed the final sheet (the one with index "numSheets-1"),
+  // then we're done!
+  return (sheetIdx == numSheets - 1);
+}
+
+void nsPrintJob::PageDone(nsresult aResult) {
+  MOZ_ASSERT(mIsDoingPrinting);
+
+  // mPagePrintTimer might be released during RemotePrintFinished, keep a
+  // reference here to make sure it lives long enough.
+  RefPtr<nsPagePrintTimer> timer = mPagePrintTimer;
+  timer->RemotePrintFinished();
+}
+
+//-----------------------------------------------------------------
+//-- Done: Printing Methods
+//-----------------------------------------------------------------
+
+//-----------------------------------------------------------------
+//-- Section: Misc Support Methods
+//-----------------------------------------------------------------
+
+//---------------------------------------------------------------------
+void nsPrintJob::SetIsPrinting(bool aIsPrinting) {
+  mIsDoingPrinting = aIsPrinting;
+  if (aIsPrinting) {
+    mHasEverPrinted = true;
+  }
+  if (mPrt && aIsPrinting) {
+    mPrt->mPreparingForPrint = true;
+  }
+}
+
+//---------------------------------------------------------------------
+void nsPrintJob::SetIsPrintPreview(bool aIsPrintPreview) {
+  mCreatedForPrintPreview = aIsPrintPreview;
+
+  if (mDocViewerPrint) {
+    mDocViewerPrint->SetIsPrintPreview(aIsPrintPreview);
+  }
+}
+
+Document* nsPrintJob::FindFocusedDocument(Document* aDoc) const {
+  nsFocusManager* fm = nsFocusManager::GetFocusManager();
+  NS_ENSURE_TRUE(fm, nullptr);
+
+  nsPIDOMWindowOuter* window = aDoc->GetOriginalDocument()->GetWindow();
+  NS_ENSURE_TRUE(window, nullptr);
+
+  nsCOMPtr<nsPIDOMWindowOuter> rootWindow = window->GetPrivateRoot();
+  NS_ENSURE_TRUE(rootWindow, nullptr);
+
+  nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
+  nsFocusManager::GetFocusedDescendant(rootWindow,
+                                       nsFocusManager::eIncludeAllDescendants,
+                                       getter_AddRefs(focusedWindow));
+  NS_ENSURE_TRUE(focusedWindow, nullptr);
+
+  if (IsWindowsInOurSubTree(focusedWindow)) {
+    return focusedWindow->GetDoc();
+  }
+
+  return nullptr;
+}
+
+//---------------------------------------------------------------------
+bool nsPrintJob::IsWindowsInOurSubTree(nsPIDOMWindowOuter* window) const {
+  if (window) {
+    nsCOMPtr<nsIDocShell> ourDocShell(do_QueryReferent(mDocShell));
+    if (ourDocShell) {
+      BrowsingContext* ourBC = ourDocShell->GetBrowsingContext();
+      BrowsingContext* bc = window->GetBrowsingContext();
+      while (bc) {
+        if (bc == ourBC) {
+          return true;
+        }
+        bc = bc->GetParent();
+      }
+    }
+  }
+  return false;
+}
+
+//-------------------------------------------------------
+bool nsPrintJob::DonePrintingSheets(nsPrintObject* aPO, nsresult aResult) {
+  // NS_ASSERTION(aPO, "Pointer is null!");
+  PR_PL(("****** In DV::DonePrintingSheets PO: %p (%s)\n", aPO,
+         aPO ? gFrameTypesStr[aPO->mFrameType] : ""));
+
+  // If there is a pageSeqFrame, make sure there are no more printCanvas active
+  // that might call |Notify| on the pagePrintTimer after things are cleaned up
+  // and printing was marked as being done.
+  if (mPageSeqFrame.IsAlive()) {
+    nsPageSequenceFrame* pageSeqFrame = do_QueryFrame(mPageSeqFrame.GetFrame());
+    pageSeqFrame->ResetPrintCanvasList();
+  }
+
+  // Guarantee that mPrt and mPrt->mPrintObject won't be deleted during a
+  // call of PrintDocContent() and FirePrintCompletionEvent().
+  RefPtr<nsPrintData> printData = mPrt;
+
+  if (aPO && !printData->mIsAborted) {
+    aPO->mHasBeenPrinted = true;
+    nsresult rv;
+    bool didPrint = PrintDocContent(printData->mPrintObject, rv);
+    if (NS_SUCCEEDED(rv) && didPrint) {
+      PR_PL(
+          ("****** In DV::DonePrintingSheets PO: %p (%s) didPrint:%s (Not Done "
+           "Printing)\n",
+           aPO, gFrameTypesStr[aPO->mFrameType], PRT_YESNO(didPrint)));
+      return false;
+    }
+  }
+
+  if (XRE_IsParentProcess() && printData->mPrintDC &&
+      !printData->mPrintDC->IsSyncPagePrinting()) {
+    printData->mPrintDC->UnregisterPageDoneCallback();
+  }
+
+  if (NS_SUCCEEDED(aResult)) {
+    FirePrintCompletionEvent();
+    // XXX mPrt may be cleared or replaced with new instance here.
+    //     However, the following methods will clean up with new mPrt or will
+    //     do nothing due to no proper nsPrintData instance.
+  }
+
+  SetIsPrinting(false);
+
+  // Release reference to mPagePrintTimer; the timer object destroys itself
+  // after this returns true
+  DisconnectPagePrintTimer();
+
+  return true;
+}
+
+//-------------------------------------------------------
+nsresult nsPrintJob::EnablePOsForPrinting() {
+  // Guarantee that mPrt and the objects it owns won't be deleted.
+  RefPtr<nsPrintData> printData = mPrt;
+
+  // NOTE: All POs have been "turned off" for printing
+  // this is where we decided which POs get printed.
+
+  if (!printData || !printData->mPrintSettings) {
+    return NS_ERROR_FAILURE;
+  }
+
+  PR_PL(("\n"));
+  PR_PL(("********* nsPrintJob::EnablePOsForPrinting *********\n"));
+
+  if (!printData->mPrintSettings->GetPrintSelectionOnly()) {
+    printData->mPrintObject->EnablePrinting(true);
+    return NS_OK;
+  }
+
+  // This means we are either printing a selected iframe or
+  // we are printing the current selection.
+  NS_ENSURE_STATE(!mDisallowSelectionPrint && printData->mSelectionRoot);
+
+  // If mSelectionRoot is a selected iframe without a selection, then just
+  // enable normally from that point.
+  if (printData->mSelectionRoot->mFrameType == eIFrame &&
+      !printData->mSelectionRoot->HasSelection()) {
+    printData->mSelectionRoot->EnablePrinting(true);
+  } else {
+    // Otherwise, only enable nsPrintObjects that have a selection.
+    printData->mSelectionRoot->EnablePrintingSelectionOnly();
+  }
+  return NS_OK;
+}
+
+//-------------------------------------------------------
+// Return the nsPrintObject with that is XMost (The widest frameset frame) AND
+// contains the XMost (widest) layout frame
+nsPrintObject* nsPrintJob::FindSmallestSTF() {
+  float smallestRatio = 1.0f;
+  nsPrintObject* smallestPO = nullptr;
+
+  for (uint32_t i = 0; i < mPrt->mPrintDocList.Length(); i++) {
+    nsPrintObject* po = mPrt->mPrintDocList.ElementAt(i);
+    NS_ASSERTION(po, "nsPrintObject can't be null!");
+    if (po->mFrameType != eFrameSet && po->mFrameType != eIFrame) {
+      if (po->mShrinkRatio < smallestRatio) {
+        smallestRatio = po->mShrinkRatio;
+        smallestPO = po;
+      }
+    }
+  }
+
+#ifdef EXTENDED_DEBUG_PRINTING
+  if (smallestPO)
+    printf("*PO: %p  Type: %d  %10.3f\n", smallestPO, smallestPO->mFrameType,
+           smallestPO->mShrinkRatio);
+#endif
+  return smallestPO;
+}
+
+//-----------------------------------------------------------------
+//-- Done: Misc Support Methods
+//-----------------------------------------------------------------
+
+//-----------------------------------------------------------------
+//-- Section: Finishing up or Cleaning up
+//-----------------------------------------------------------------
+
+//-----------------------------------------------------------------
+void nsPrintJob::CloseProgressDialog(
+    nsIWebProgressListener* aWebProgressListener) {
+  if (aWebProgressListener) {
+    aWebProgressListener->OnStateChange(
+        nullptr, nullptr,
+        nsIWebProgressListener::STATE_STOP |
+            nsIWebProgressListener::STATE_IS_DOCUMENT,
+        NS_OK);
+  }
+}
+
+//-----------------------------------------------------------------
+nsresult nsPrintJob::FinishPrintPreview() {
+  nsresult rv = NS_OK;
+
+#ifdef NS_PRINT_PREVIEW
+
+  // If mPrt is null we've already finished with print preview. If mPrt is not
+  // null but mIsCreatingPrintPreview is false FinishPrintPreview must have
+  // already failed due to DocumentReadyForPrinting failing.
+  if (!mPrt || !mIsCreatingPrintPreview) {
+    return rv;
+  }
+
+  rv = DocumentReadyForPrinting();
+
+  // Note that this method may be called while the instance is being
+  // initialized.  Some methods which initialize the instance (e.g.,
+  // DoCommonPrint) may need to stop initializing and return error if
+  // this is called.  Therefore it's important to set mIsCreatingPrintPreview
+  // state to false here.  If you need to stop setting that here, you need to
+  // keep them being able to check whether the owner stopped using this
+  // instance.
+  mIsCreatingPrintPreview = false;
+
+  // mPrt may be cleared during a call of nsPrintData::OnEndPrinting()
+  // because that method invokes some arbitrary listeners.
+  RefPtr<nsPrintData> printData = mPrt;
+  if (NS_FAILED(rv)) {
+    /* cleanup done, let's fire-up an error dialog to notify the user
+     * what went wrong...
+     */
+    printData->OnEndPrinting();
+
+    return rv;
+  }
+
+  if (mPrintPreviewCallback) {
+    const bool hasSelection =
+        !mDisallowSelectionPrint && printData->mSelectionRoot;
+    mPrintPreviewCallback(PrintPreviewResultInfo(
+        GetPrintPreviewNumSheets(), GetRawNumPages(), GetIsEmpty(),
+        hasSelection, hasSelection && printData->mPrintObject->HasSelection()));
+    mPrintPreviewCallback = nullptr;
+  }
+
+  // At this point we are done preparing everything
+  // before it is to be created
+
+  printData->OnEndPrinting();
+  // XXX If mPrt becomes nullptr or different instance here, what should we
+  //     do?
+
+  // PrintPreview was built using the mPrt (code reuse)
+  // then we assign it over
+  mPrtPreview = std::move(mPrt);
+
+#endif  // NS_PRINT_PREVIEW
+
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------
+//-- Done: Finishing up or Cleaning up
+//-----------------------------------------------------------------
+
+/*=============== Timer Related Code ======================*/
+nsresult nsPrintJob::StartPagePrintTimer(const UniquePtr<nsPrintObject>& aPO) {
+  if (!mPagePrintTimer) {
+    // Get the delay time in between the printing of each page
+    // this gives the user more time to press cancel
+    int32_t printPageDelay = 50;
+    mPrt->mPrintSettings->GetPrintPageDelay(&printPageDelay);
+
+    nsCOMPtr<nsIContentViewer> cv = do_QueryInterface(mDocViewerPrint);
+    NS_ENSURE_TRUE(cv, NS_ERROR_FAILURE);
+    nsCOMPtr<Document> doc = cv->GetDocument();
+    NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
+
+    mPagePrintTimer =
+        new nsPagePrintTimer(this, mDocViewerPrint, doc, printPageDelay);
+
+    nsCOMPtr<nsIPrintSession> printSession;
+    nsresult rv =
+        mPrt->mPrintSettings->GetPrintSession(getter_AddRefs(printSession));
+    if (NS_SUCCEEDED(rv) && printSession) {
+      RefPtr<layout::RemotePrintJobChild> remotePrintJob =
+          printSession->GetRemotePrintJob();
+      if (remotePrintJob) {
+        remotePrintJob->SetPagePrintTimer(mPagePrintTimer);
+        remotePrintJob->SetPrintJob(this);
+      }
+    }
+  }
+
+  return mPagePrintTimer->Start(aPO.get());
+}
+
+/*=============== nsIObserver Interface ======================*/
+MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHODIMP nsPrintJob::Observe(
+    nsISupports* aSubject, const char* aTopic, const char16_t* aData) {
+  // We expect to be called by nsIPrintingPromptService after we were passed to
+  // it by via the nsIPrintingPromptService::ShowPrintProgressDialog call in
+  // ShowPrintProgress.  Once it has opened the progress dialog it calls this
+  // method, passing null as the topic.
+
+  if (aTopic) {
+    return NS_OK;
+  }
+
+  nsresult rv = InitPrintDocConstruction(true);
+  if (!mIsDoingPrinting && mPrtPreview) {
+    RefPtr<nsPrintData> printDataOfPrintPreview = mPrtPreview;
+    printDataOfPrintPreview->OnEndPrinting();
+  }
+
+  return rv;
+}
+
+//---------------------------------------------------------------
+//-- PLEvent Notification
+//---------------------------------------------------------------
+class nsPrintCompletionEvent : public Runnable {
+ public:
+  explicit nsPrintCompletionEvent(nsIDocumentViewerPrint* docViewerPrint)
+      : mozilla::Runnable("nsPrintCompletionEvent"),
+        mDocViewerPrint(docViewerPrint) {
+    NS_ASSERTION(mDocViewerPrint, "mDocViewerPrint is null.");
+  }
+
+  NS_IMETHOD Run() override {
+    if (mDocViewerPrint) mDocViewerPrint->OnDonePrinting();
+    return NS_OK;
+  }
+
+ private:
+  nsCOMPtr<nsIDocumentViewerPrint> mDocViewerPrint;
+};
+
+//-----------------------------------------------------------
+void nsPrintJob::FirePrintCompletionEvent() {
+  MOZ_ASSERT(NS_IsMainThread());
+  nsCOMPtr<nsIRunnable> event = new nsPrintCompletionEvent(mDocViewerPrint);
+  nsCOMPtr<nsIContentViewer> cv = do_QueryInterface(mDocViewerPrint);
+  NS_ENSURE_TRUE_VOID(cv);
+  nsCOMPtr<Document> doc = cv->GetDocument();
+  NS_ENSURE_TRUE_VOID(doc);
+
+  NS_ENSURE_SUCCESS_VOID(doc->Dispatch(TaskCategory::Other, event.forget()));
+}
+
+void nsPrintJob::DisconnectPagePrintTimer() {
+  if (mPagePrintTimer) {
+    mPagePrintTimer->Disconnect();
+    mPagePrintTimer = nullptr;
+  }
+}
+
+//---------------------------------------------------------------
+//---------------------------------------------------------------
+//-- Debug helper routines
+//---------------------------------------------------------------
+//---------------------------------------------------------------
+#if defined(XP_WIN) && defined(EXTENDED_DEBUG_PRINTING)
+#  include "windows.h"
+#  include "process.h"
+#  include "direct.h"
+
+#  define MY_FINDFIRST(a, b) FindFirstFile(a, b)
+#  define MY_FINDNEXT(a, b) FindNextFile(a, b)
+#  define ISDIR(a) (a.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+#  define MY_FINDCLOSE(a) FindClose(a)
+#  define MY_FILENAME(a) a.cFileName
+#  define MY_FILESIZE(a) (a.nFileSizeHigh * MAXDWORD) + a.nFileSizeLow
+
+int RemoveFilesInDir(const char* aDir) {
+  WIN32_FIND_DATA data_ptr;
+  HANDLE find_handle;
+
+  char path[MAX_PATH];
+
+  strcpy(path, aDir);
+
+  // Append slash to the end of the directory names if not there
+  if (path[strlen(path) - 1] != '\\') strcat(path, "\\");
+
+  char findPath[MAX_PATH];
+  strcpy(findPath, path);
+  strcat(findPath, "*.*");
+
+  find_handle = MY_FINDFIRST(findPath, &data_ptr);
+
+  if (find_handle != INVALID_HANDLE_VALUE) {
+    do {
+      if (ISDIR(data_ptr) && (stricmp(MY_FILENAME(data_ptr), ".")) &&
+          (stricmp(MY_FILENAME(data_ptr), ".."))) {
+        // skip
+      } else if (!ISDIR(data_ptr)) {
+        if (!strncmp(MY_FILENAME(data_ptr), "print_dump", 10)) {
+          char fileName[MAX_PATH];
+          strcpy(fileName, aDir);
+          strcat(fileName, "\\");
+          strcat(fileName, MY_FILENAME(data_ptr));
+          printf("Removing %s\n", fileName);
+          remove(fileName);
+        }
+      }
+    } while (MY_FINDNEXT(find_handle, &data_ptr));
+    MY_FINDCLOSE(find_handle);
+  }
+  return TRUE;
+}
+#endif
+
+#ifdef EXTENDED_DEBUG_PRINTING
+
+/** ---------------------------------------------------
+ *  Dumps Frames for Printing
+ */
+static void RootFrameList(nsPresContext* aPresContext, FILE* out,
+                          const char* aPrefix) {
+  if (!aPresContext || !out) return;
+
+  if (PresShell* presShell = aPresContext->GetPresShell()) {
+    nsIFrame* frame = presShell->GetRootFrame();
+    if (frame) {
+      frame->List(out, aPrefix);
+    }
+  }
+}
+
+/** ---------------------------------------------------
+ *  Dumps Frames for Printing
+ */
+static void DumpFrames(FILE* out, nsPresContext* aPresContext,
+                       gfxContext* aRendContext, nsIFrame* aFrame,
+                       int32_t aLevel) {
+  NS_ASSERTION(out, "Pointer is null!");
+  NS_ASSERTION(aPresContext, "Pointer is null!");
+  NS_ASSERTION(aRendContext, "Pointer is null!");
+  NS_ASSERTION(aFrame, "Pointer is null!");
+
+  nsIFrame* child = aFrame->PrincipalChildList().FirstChild();
+  while (child != nullptr) {
+    for (int32_t i = 0; i < aLevel; i++) {
+      fprintf(out, "  ");
+    }
+    nsAutoString tmp;
+    child->GetFrameName(tmp);
+    fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out);
+    bool isSelected;
+    if (child->IsVisibleForPainting()) {
+      fprintf(out, " %p %s", child, isSelected ? "VIS" : "UVS");
+      nsRect rect = child->GetRect();
+      fprintf(out, "[%d,%d,%d,%d] ", rect.x, rect.y, rect.width, rect.height);
+      fprintf(out, "v: %p ", (void*)child->GetView());
+      fprintf(out, "\n");
+      DumpFrames(out, aPresContext, aRendContext, child, aLevel + 1);
+      child = child->GetNextSibling();
+    }
+  }
+}
+
+/** ---------------------------------------------------
+ *  Dumps the Views from the DocShell
+ */
+static void DumpViews(nsIDocShell* aDocShell, FILE* out) {
+  NS_ASSERTION(aDocShell, "Pointer is null!");
+  NS_ASSERTION(out, "Pointer is null!");
+
+  if (nullptr != aDocShell) {
+    fprintf(out, "docshell=%p \n", aDocShell);
+    if (PresShell* presShell = aDocShell->GetPresShell()) {
+      nsViewManager* vm = presShell->GetViewManager();
+      if (vm) {
+        nsView* root = vm->GetRootView();
+        if (root) {
+          root->List(out);
+        }
+      }
+    } else {
+      fputs("null pres shell\n", out);
+    }
+
+    // dump the views of the sub documents
+    int32_t i, n;
+    BrowsingContext* bc = nsDocShell::Cast(aDocShell)->GetBrowsingContext();
+    for (auto& child : bc->Children()) {
+      if (auto childDS = child->GetDocShell()) {
+        DumpViews(childAsShell, out);
+      }
+    }
+  }
+}
+
+/** ---------------------------------------------------
+ *  Dumps the Views and Frames
+ */
+void DumpLayoutData(const char* aTitleStr, const char* aURLStr,
+                    nsPresContext* aPresContext, nsDeviceContext* aDC,
+                    nsIFrame* aRootFrame, nsIDocShell* aDocShell,
+                    FILE* aFD = nullptr) {
+  if (!MOZ_LOG_TEST(gPrintingLog, DUMP_LAYOUT_LEVEL)) {
+    return;
+  }
+
+  if (aPresContext == nullptr || aDC == nullptr) {
+    return;
+  }
+
+#  ifdef NS_PRINT_PREVIEW
+  if (aPresContext->Type() == nsPresContext::eContext_PrintPreview) {
+    return;
+  }
+#  endif
+
+  NS_ASSERTION(aRootFrame, "Pointer is null!");
+  NS_ASSERTION(aDocShell, "Pointer is null!");
+
+  // Dump all the frames and view to a a file
+  char filename[256];
+  sprintf(filename, "print_dump_layout_%d.txt", gDumpLOFileNameCnt++);
+  FILE* fd = aFD ? aFD : fopen(filename, "w");
+  if (fd) {
+    fprintf(fd, "Title: %s\n", aTitleStr ? aTitleStr : "");
+    fprintf(fd, "URL:   %s\n", aURLStr ? aURLStr : "");
+    fprintf(fd, "--------------- Frames ----------------\n");
+    fprintf(fd, "--------------- Frames ----------------\n");
+    // RefPtr<gfxContext> renderingContext =
+    //  aDC->CreateRenderingContext();
+    RootFrameList(aPresContext, fd, "");
+    // DumpFrames(fd, aPresContext, renderingContext, aRootFrame, 0);
+    fprintf(fd, "---------------------------------------\n\n");
+    fprintf(fd, "--------------- Views From Root Frame----------------\n");
+    nsView* v = aRootFrame->GetView();
+    if (v) {
+      v->List(fd);
+    } else {
+      printf("View is null!\n");
+    }
+    if (aDocShell) {
+      fprintf(fd, "--------------- All Views ----------------\n");
+      DumpViews(aDocShell, fd);
+      fprintf(fd, "---------------------------------------\n\n");
+    }
+    if (aFD == nullptr) {
+      fclose(fd);
+    }
+  }
+}
+
+//-------------------------------------------------------------
+static void DumpPrintObjectsList(const nsTArray<nsPrintObject*>& aDocList) {
+  if (!MOZ_LOG_TEST(gPrintingLog, DUMP_LAYOUT_LEVEL)) {
+    return;
+  }
+
+  const char types[][3] = {"DC", "FR", "IF", "FS"};
+  PR_PL(("Doc List\n***************************************************\n"));
+  PR_PL(
+      ("T  P A H    PO    DocShell   Seq     Page      Root     Page#    "
+       "Rect\n"));
+  for (nsPrintObject* po : aDocList) {
+    NS_ASSERTION(po, "nsPrintObject can't be null!");
+    nsIFrame* rootFrame = nullptr;
+    if (po->mPresShell) {
+      rootFrame = po->mPresShell->GetRootFrame();
+      while (rootFrame != nullptr) {
+        nsPageSequenceFrame* sqf = do_QueryFrame(rootFrame);
+        if (sqf) {
+          break;
+        }
+        rootFrame = rootFrame->PrincipalChildList().FirstChild();
+      }
+    }
+
+    PR_PL(("%s %d %d %p %p %p\n", types[po->mFrameType],
+           po->PrintingIsEnabled(), po->mHasBeenPrinted, po,
+           po->mDocShell.get(), rootFrame));
+  }
+}
+
+//-------------------------------------------------------------
+static void DumpPrintObjectsTree(nsPrintObject* aPO, int aLevel, FILE* aFD) {
+  if (!MOZ_LOG_TEST(gPrintingLog, DUMP_LAYOUT_LEVEL)) {
+    return;
+  }
+
+  NS_ASSERTION(aPO, "Pointer is null!");
+
+  FILE* fd = aFD ? aFD : stdout;
+  const char types[][3] = {"DC", "FR", "IF", "FS"};
+  if (aLevel == 0) {
+    fprintf(fd,
+            "DocTree\n***************************************************\n");
+    fprintf(fd, "T     PO    DocShell   Seq      Page     Page#    Rect\n");
+  }
+  for (const auto& po : aPO->mKids) {
+    NS_ASSERTION(po, "nsPrintObject can't be null!");
+    for (int32_t k = 0; k < aLevel; k++) fprintf(fd, "  ");
+    fprintf(fd, "%s %p %p\n", types[po->mFrameType], po.get(),
+            po->mDocShell.get());
+  }
+}
+
+//-------------------------------------------------------------
+static void GetDocTitleAndURL(const UniquePtr<nsPrintObject>& aPO,
+                              nsACString& aDocStr, nsACString& aURLStr) {
+  nsAutoString docTitleStr;
+  nsAutoString docURLStr;
+  GetDocumentTitleAndURL(aPO->mDocument, docTitleStr, docURLStr);
+  CopyUTF16toUTF8(docTitleStr, aDocStr);
+  CopyUTF16toUTF8(docURLStr, aURLStr);
+}
+
+//-------------------------------------------------------------
+static void DumpPrintObjectsTreeLayout(const UniquePtr<nsPrintObject>& aPO,
+                                       nsDeviceContext* aDC, int aLevel,
+                                       FILE* aFD) {
+  if (!MOZ_LOG_TEST(gPrintingLog, DUMP_LAYOUT_LEVEL)) {
+    return;
+  }
+
+  NS_ASSERTION(aPO, "Pointer is null!");
+  NS_ASSERTION(aDC, "Pointer is null!");
+
+  const char types[][3] = {"DC", "FR", "IF", "FS"};
+  FILE* fd = nullptr;
+  if (aLevel == 0) {
+    fd = fopen("tree_layout.txt", "w");
+    fprintf(fd,
+            "DocTree\n***************************************************\n");
+    fprintf(fd, "***************************************************\n");
+    fprintf(fd, "T     PO    DocShell   Seq      Page     Page#    Rect\n");
+  } else {
+    fd = aFD;
+  }
+  if (fd) {
+    nsIFrame* rootFrame = nullptr;
+    if (aPO->mPresShell) {
+      rootFrame = aPO->mPresShell->GetRootFrame();
+    }
+    for (int32_t k = 0; k < aLevel; k++) fprintf(fd, "  ");
+    fprintf(fd, "%s %p %p\n", types[aPO->mFrameType], aPO.get(),
+            aPO->mDocShell.get());
+    if (aPO->PrintingIsEnabled()) {
+      nsAutoCString docStr;
+      nsAutoCString urlStr;
+      GetDocTitleAndURL(aPO, docStr, urlStr);
+      DumpLayoutData(docStr.get(), urlStr.get(), aPO->mPresContext, aDC,
+                     rootFrame, aPO->mDocShell, fd);
+    }
+    fprintf(fd, "<***************************************************>\n");
+
+    for (const auto& po : aPO->mKids) {
+      NS_ASSERTION(po, "nsPrintObject can't be null!");
+      DumpPrintObjectsTreeLayout(po, aDC, aLevel + 1, fd);
+    }
+  }
+  if (aLevel == 0 && fd) {
+    fclose(fd);
+  }
+}
+
+//-------------------------------------------------------------
+static void DumpPrintObjectsListStart(
+    const char* aStr, const nsTArray<nsPrintObject*>& aDocList) {
+  if (!MOZ_LOG_TEST(gPrintingLog, DUMP_LAYOUT_LEVEL)) {
+    return;
+  }
+
+  NS_ASSERTION(aStr, "Pointer is null!");
+
+  PR_PL(("%s\n", aStr));
+  DumpPrintObjectsList(aDocList);
+}
+
+#endif
+
+//---------------------------------------------------------------
+//---------------------------------------------------------------
+//-- End of debug helper routines
+//---------------------------------------------------------------