The Tor Browser: layout/printing/nsPrintEngine.cpp@97036ab72558 (annotated)

layout/printing/nsPrintEngine.cpp@97036ab72558 (annotated)

layout/printing/nsPrintEngine.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* 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 "nsPrintEngine.h"
 #include "nsIStringBundle.h"
 #include "nsReadableUtils.h"
 #include "nsCRT.h"
 #include "mozilla/AsyncEventDispatcher.h"
 #include "mozilla/dom/Selection.h"
 #include "nsIScriptGlobalObject.h"
 #include "nsPIDOMWindow.h"
 #include "nsIDocShell.h"
 #include "nsIFrame.h"
 #include "nsIURI.h"
 #include "nsITextToSubURI.h"
 #include "nsError.h"
 #include "nsView.h"
 #include <algorithm>
 // Print Options
 #include "nsIPrintSettings.h"
 #include "nsIPrintSettingsService.h"
 #include "nsIPrintOptions.h"
 #include "nsIPrintSession.h"
 #include "nsGfxCIID.h"
 #include "nsIServiceManager.h"
 #include "nsGkAtoms.h"
 #include "nsXPCOM.h"
 #include "nsISupportsPrimitives.h"
 static const char sPrintSettingsServiceContractID[] = "@mozilla.org/gfx/printsettings-service;1";
 // Printing Events
 #include "nsPrintPreviewListener.h"
 #include "nsThreadUtils.h"
 // Printing
 #include "nsIWebBrowserPrint.h"
 #include "nsIDOMHTMLFrameElement.h"
 #include "nsIDOMHTMLFrameSetElement.h"
 #include "nsIDOMHTMLIFrameElement.h"
 #include "nsIDOMHTMLObjectElement.h"
 #include "nsIDOMHTMLEmbedElement.h"
 // Print Preview
 #include "imgIContainer.h" // image animation mode constants
 #include "nsIWebBrowserPrint.h" // needed for PrintPreview Navigation constants
 // Print Progress
 #include "nsIPrintProgress.h"
 #include "nsIPrintProgressParams.h"
 #include "nsIObserver.h"
 // Print error dialog
 #include "nsIPrompt.h"
 #include "nsIWindowWatcher.h"
 // Printing Prompts
 #include "nsIPrintingPromptService.h"
 static const char kPrintingPromptService[] = "@mozilla.org/embedcomp/printingprompt-service;1";
 // Printing Timer
 #include "nsPagePrintTimer.h"
 // FrameSet
 #include "nsIDocument.h"
 // Focus
 #include "nsISelectionController.h"
 // Misc
 #include "nsISupportsUtils.h"
 #include "nsIScriptContext.h"
 #include "nsIDOMDocument.h"
 #include "nsISelectionListener.h"
 #include "nsISelectionPrivate.h"
 #include "nsIDOMRange.h"
 #include "nsContentCID.h"
 #include "nsLayoutCID.h"
 #include "nsContentUtils.h"
 #include "nsIPresShell.h"
 #include "nsLayoutUtils.h"
 #include "mozilla/Preferences.h"
 #include "nsWidgetsCID.h"
 #include "nsIDeviceContextSpec.h"
 #include "nsViewManager.h"
 #include "nsView.h"
 #include "nsRenderingContext.h"
 #include "nsIPageSequenceFrame.h"
 #include "nsIURL.h"
 #include "nsIContentViewerEdit.h"
 #include "nsIContentViewerFile.h"
 #include "nsIMarkupDocumentViewer.h"
 #include "nsIInterfaceRequestor.h"
 #include "nsIInterfaceRequestorUtils.h"
 #include "nsIDocShellTreeOwner.h"
 #include "nsIWebBrowserChrome.h"
 #include "nsIBaseWindow.h"
 #include "nsILayoutHistoryState.h"
 #include "nsFrameManager.h"
 #include "nsHTMLReflowState.h"
 #include "nsIDOMHTMLAnchorElement.h"
 #include "nsIDOMHTMLAreaElement.h"
 #include "nsIDOMHTMLLinkElement.h"
 #include "nsIDOMHTMLImageElement.h"
 #include "nsIContentViewerContainer.h"
 #include "nsIContentViewer.h"
 #include "nsIDocumentViewerPrint.h"
 #include "nsFocusManager.h"
 #include "nsRange.h"
 #include "nsCDefaultURIFixup.h"
 #include "nsIURIFixup.h"
 #include "mozilla/dom/Element.h"
 #include "nsContentList.h"
 #include "nsIChannel.h"
 #include "xpcpublic.h"
 using namespace mozilla;
 using namespace mozilla::dom;
 //-----------------------------------------------------
 // PR LOGGING
 #ifdef MOZ_LOGGING
 #define FORCE_PR_LOG /* Allow logging in the release build */
 #endif
 #include "prlog.h"
 #ifdef PR_LOGGING
 #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
 #define DUMP_LAYOUT_LEVEL 9 // this turns on the dumping of each doucment's layout info
 #ifndef PR_PL
 static PRLogModuleInfo *
 GetPrintingLog()
 {
   static PRLogModuleInfo *sLog;
   if (!sLog)
     sLog = PR_NewLogModule("printing");
   return sLog;
 }
 #define PR_PL(_p1)  PR_LOG(GetPrintingLog(), PR_LOG_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"};
 static const char * gPrintFrameTypeStr[]   = {"kNoFrames", "kFramesAsIs", "kSelectedFrame", "kEachFrameSep"};
 static const char * gFrameHowToEnableStr[] = {"kFrameEnableNone", "kFrameEnableAll", "kFrameEnableAsIsAndEach"};
 static const char * gPrintRangeStr[]       = {"kRangeAllPages", "kRangeSpecifiedPageRange", "kRangeSelection", "kRangeFocusFrame"};
 #else
 #define PRT_YESNO(_p)
 #define PR_PL(_p1)
 #endif
 #ifdef EXTENDED_DEBUG_PRINTING
 // Forward Declarations
 static void DumpPrintObjectsListStart(const char * aStr, nsTArray<nsPrintObject*> * aDocList);
 static void DumpPrintObjectsTree(nsPrintObject * aPO, int aLevel= 0, FILE* aFD = nullptr);
 static void DumpPrintObjectsTreeLayout(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);
 #define DUMP_DOC_TREELAYOUT DumpPrintObjectsTreeLayout(mPrt->mPrintObject, mPrt->mPrintDC);
 #else
 #define DUMP_DOC_LIST(_title)
 #define DUMP_DOC_TREE
 #define DUMP_DOC_TREELAYOUT
 #endif
 class nsScriptSuppressor
 {
 public:
   nsScriptSuppressor(nsPrintEngine* aPrintEngine)
   : mPrintEngine(aPrintEngine), mSuppressed(false) {}
   ~nsScriptSuppressor() { Unsuppress(); }
   void Suppress()
   {
     if (mPrintEngine) {
       mSuppressed = true;
       mPrintEngine->TurnScriptingOn(false);
     }
   }
   void Unsuppress()
   {
     if (mPrintEngine && mSuppressed) {
       mPrintEngine->TurnScriptingOn(true);
     }
     mSuppressed = false;
   }
   void Disconnect() { mPrintEngine = nullptr; }
 protected:
   nsRefPtr<nsPrintEngine> mPrintEngine;
   bool                    mSuppressed;
 };
 NS_IMPL_ISUPPORTS(nsPrintEngine, nsIWebProgressListener,
                   nsISupportsWeakReference, nsIObserver)
 //---------------------------------------------------
 //-- nsPrintEngine Class Impl
 //---------------------------------------------------
 nsPrintEngine::nsPrintEngine() :
   mIsCreatingPrintPreview(false),
   mIsDoingPrinting(false),
   mIsDoingPrintPreview(false),
   mProgressDialogIsShown(false),
   mScreenDPI(115.0f),
   mPrt(nullptr),
   mPagePrintTimer(nullptr),
   mPageSeqFrame(nullptr),
   mPrtPreview(nullptr),
   mOldPrtPreview(nullptr),
   mDebugFile(nullptr),
   mLoadCounter(0),
   mDidLoadDataForPrinting(false),
   mIsDestroying(false),
   mDisallowSelectionPrint(false),
   mNoMarginBoxes(false)
 {
 }
 //-------------------------------------------------------
 nsPrintEngine::~nsPrintEngine()
 {
   Destroy(); // for insurance
 }
 //-------------------------------------------------------
 void nsPrintEngine::Destroy()
 {
   if (mIsDestroying) {
     return;
   }
   mIsDestroying = true;
   if (mPrt) {
     delete mPrt;
     mPrt = nullptr;
   }
 #ifdef NS_PRINT_PREVIEW
   if (mPrtPreview) {
     delete mPrtPreview;
     mPrtPreview = nullptr;
   }
   // This is insruance
   if (mOldPrtPreview) {
     delete mOldPrtPreview;
     mOldPrtPreview = nullptr;
   }
 #endif
   mDocViewerPrint = nullptr;
 }
 //-------------------------------------------------------
 void nsPrintEngine::DestroyPrintingData()
 {
   if (mPrt) {
     nsPrintData* data = mPrt;
     mPrt = nullptr;
     delete data;
   }
 }
 //---------------------------------------------------------------------------------
 //-- Section: Methods needed by the DocViewer
 //---------------------------------------------------------------------------------
 //--------------------------------------------------------
 nsresult nsPrintEngine::Initialize(nsIDocumentViewerPrint* aDocViewerPrint,
                                    nsIDocShell*            aContainer,
                                    nsIDocument*            aDocument,
                                    float                   aScreenDPI,
                                    FILE*                   aDebugFile)
 {
   NS_ENSURE_ARG_POINTER(aDocViewerPrint);
   NS_ENSURE_ARG_POINTER(aContainer);
   NS_ENSURE_ARG_POINTER(aDocument);
   mDocViewerPrint = aDocViewerPrint;
   mContainer      = do_GetWeakReference(aContainer);
   mDocument       = aDocument;
   mScreenDPI      = aScreenDPI;
   mDebugFile      = aDebugFile;      // ok to be nullptr
   return NS_OK;
 }
 //-------------------------------------------------------
 bool
 nsPrintEngine::CheckBeforeDestroy()
 {
   if (mPrt && mPrt->mPreparingForPrint) {
     mPrt->mDocWasToBeDestroyed = true;
     return true;
   }
   return false;
 }
 //-------------------------------------------------------
 nsresult
 nsPrintEngine::Cancelled()
 {
   if (mPrt && mPrt->mPrintSettings) {
     return mPrt->mPrintSettings->SetIsCancelled(true);
   }
   return NS_ERROR_FAILURE;
 }
 //-------------------------------------------------------
 // Install our event listeners on the document to prevent
 // some events from being processed while in PrintPreview
 //
 // No return code - if this fails, there isn't much we can do
 void
 nsPrintEngine::InstallPrintPreviewListener()
 {
   if (!mPrt->mPPEventListeners) {
     nsCOMPtr<nsIDocShell> docShell = do_QueryReferent(mContainer);
     nsCOMPtr<nsPIDOMWindow> win(do_GetInterface(docShell));
     if (win) {
       nsCOMPtr<EventTarget> target = do_QueryInterface(win->GetFrameElementInternal());
       mPrt->mPPEventListeners = new nsPrintPreviewListener(target);
       mPrt->mPPEventListeners->AddListeners();
     }
   }
 }
 //----------------------------------------------------------------------
 nsresult
 nsPrintEngine::GetSeqFrameAndCountPagesInternal(nsPrintObject*  aPO,
                                                 nsIFrame*&    aSeqFrame,
                                                 int32_t&      aCount)
 {
   NS_ENSURE_ARG_POINTER(aPO);
   // Finds the SimplePageSequencer frame
   nsIPageSequenceFrame* seqFrame = aPO->mPresShell->GetPageSequenceFrame();
   aSeqFrame = do_QueryFrame(seqFrame);
   if (!aSeqFrame) {
     return NS_ERROR_FAILURE;
   }
   // first count the total number of pages
   aCount = 0;
   nsIFrame* pageFrame = aSeqFrame->GetFirstPrincipalChild();
   while (pageFrame != nullptr) {
     aCount++;
     pageFrame = pageFrame->GetNextSibling();
   }
   return NS_OK;
 }
 //-----------------------------------------------------------------
 nsresult nsPrintEngine::GetSeqFrameAndCountPages(nsIFrame*& aSeqFrame, int32_t& aCount)
 {
   NS_ASSERTION(mPrtPreview, "mPrtPreview can't be null!");
   return GetSeqFrameAndCountPagesInternal(mPrtPreview->mPrintObject, aSeqFrame, aCount);
 }
 //---------------------------------------------------------------------------------
 //-- Done: Methods needed by the DocViewer
 //---------------------------------------------------------------------------------
 //---------------------------------------------------------------------------------
 //-- Section: nsIWebBrowserPrint
 //---------------------------------------------------------------------------------
 // Foward decl for Debug Helper Functions
 #ifdef EXTENDED_DEBUG_PRINTING
 static int RemoveFilesInDir(const char * aDir);
 static void GetDocTitleAndURL(nsPrintObject* aPO, char *& aDocStr, char *& aURLStr);
 static void DumpPrintObjectsTree(nsPrintObject * aPO, int aLevel, FILE* aFD);
 static void DumpPrintObjectsList(nsTArray<nsPrintObject*> * aDocList);
 static void RootFrameList(nsPresContext* aPresContext, FILE* out, int32_t aIndent);
 static void DumpViews(nsIDocShell* aDocShell, FILE* out);
 static void DumpLayoutData(char* aTitleStr, char* aURLStr,
                            nsPresContext* aPresContext,
                            nsDeviceContext * aDC, nsIFrame * aRootFrame,
                            nsIDocShell * aDocShell, FILE* aFD);
 #endif
 //--------------------------------------------------------------------------------
 nsresult
 nsPrintEngine::CommonPrint(bool                    aIsPrintPreview,
                            nsIPrintSettings*       aPrintSettings,
                            nsIWebProgressListener* aWebProgressListener,
                            nsIDOMDocument* aDoc) {
   nsRefPtr<nsPrintEngine> kungfuDeathGrip = this;
   nsresult rv = DoCommonPrint(aIsPrintPreview, aPrintSettings,
                               aWebProgressListener, aDoc);
   if (NS_FAILED(rv)) {
     if (aIsPrintPreview) {
       SetIsCreatingPrintPreview(false);
       SetIsPrintPreview(false);
     } else {
       SetIsPrinting(false);
     }
     if (mProgressDialogIsShown)
       CloseProgressDialog(aWebProgressListener);
     if (rv != NS_ERROR_ABORT && rv != NS_ERROR_OUT_OF_MEMORY)
       ShowPrintErrorDialog(rv, !aIsPrintPreview);
     delete mPrt;
     mPrt = nullptr;
   }
   return rv;
 }
 nsresult
 nsPrintEngine::DoCommonPrint(bool                    aIsPrintPreview,
                              nsIPrintSettings*       aPrintSettings,
                              nsIWebProgressListener* aWebProgressListener,
                              nsIDOMDocument*         aDoc)
 {
   nsresult rv;
   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;
     if (mIsDoingPrintPreview) {
       mOldPrtPreview = mPrtPreview;
       mPrtPreview = nullptr;
     }
   } else {
     mProgressDialogIsShown = false;
   }
   mPrt = new nsPrintData(aIsPrintPreview ? nsPrintData::eIsPrintPreview :
                                            nsPrintData::eIsPrinting);
   NS_ENSURE_TRUE(mPrt, NS_ERROR_OUT_OF_MEMORY);
   // if they don't pass in a PrintSettings, then get the Global PS
   mPrt->mPrintSettings = aPrintSettings;
   if (!mPrt->mPrintSettings) {
     rv = GetGlobalPrintSettings(getter_AddRefs(mPrt->mPrintSettings));
     NS_ENSURE_SUCCESS(rv, rv);
   }
   rv = CheckForPrinters(mPrt->mPrintSettings);
   NS_ENSURE_SUCCESS(rv, rv);
   mPrt->mPrintSettings->SetIsCancelled(false);
   mPrt->mPrintSettings->GetShrinkToFit(&mPrt->mShrinkToFit);
   // In the case the margin boxes are not printed store the print settings for
   // the footer/header to be used as default print setting for follow up prints.
   mPrt->mPrintSettings->SetPersistMarginBoxSettings(!mNoMarginBoxes);
   if (mNoMarginBoxes) {
     // Set the footer/header to blank.
     const char16_t* emptyString = EmptyString().get();
     mPrt->mPrintSettings->SetHeaderStrLeft(emptyString);
     mPrt->mPrintSettings->SetHeaderStrCenter(emptyString);
     mPrt->mPrintSettings->SetHeaderStrRight(emptyString);
     mPrt->mPrintSettings->SetFooterStrLeft(emptyString);
     mPrt->mPrintSettings->SetFooterStrCenter(emptyString);
     mPrt->mPrintSettings->SetFooterStrRight(emptyString);
   }
   if (aIsPrintPreview) {
     SetIsCreatingPrintPreview(true);
     SetIsPrintPreview(true);
     nsCOMPtr<nsIMarkupDocumentViewer> viewer =
       do_QueryInterface(mDocViewerPrint);
     if (viewer) {
       viewer->SetTextZoom(1.0f);
       viewer->SetFullZoom(1.0f);
       viewer->SetMinFontSize(0);
     }
   }
   // Create a print session and let the print settings know about it.
   // 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;
   if (!aIsPrintPreview) {
     printSession = do_CreateInstance("@mozilla.org/gfx/printsession;1", &rv);
     NS_ENSURE_SUCCESS(rv, rv);
     mPrt->mPrintSettings->SetPrintSession(printSession);
   }
   if (aWebProgressListener != nullptr) {
     mPrt->mPrintProgressListeners.AppendObject(aWebProgressListener);
   }
   // Get the currently focused window and cache it
   // because the Print Dialog will "steal" focus and later when you try
   // to get the currently focused windows it will be nullptr
   mPrt->mCurrentFocusWin = FindFocusedDOMWindow();
   // Check to see if there is a "regular" selection
   bool isSelection = IsThereARangeSelection(mPrt->mCurrentFocusWin);
   // Get the docshell for this documentviewer
   nsCOMPtr<nsIDocShell> webContainer(do_QueryReferent(mContainer, &rv));
   NS_ENSURE_SUCCESS(rv, rv);
   {
     if (aIsPrintPreview) {
       nsCOMPtr<nsIContentViewer> viewer;
       webContainer->GetContentViewer(getter_AddRefs(viewer));
       if (viewer && viewer->GetDocument() && viewer->GetDocument()->IsShowing()) {
         viewer->GetDocument()->OnPageHide(false, nullptr);
       }
     }
     nsAutoScriptBlocker scriptBlocker;
     mPrt->mPrintObject = new nsPrintObject();
     NS_ENSURE_TRUE(mPrt->mPrintObject, NS_ERROR_OUT_OF_MEMORY);
     rv = mPrt->mPrintObject->Init(webContainer, aDoc, aIsPrintPreview);
     NS_ENSURE_SUCCESS(rv, rv);
     NS_ENSURE_TRUE(mPrt->mPrintDocList.AppendElement(mPrt->mPrintObject),
                    NS_ERROR_OUT_OF_MEMORY);
     mPrt->mIsParentAFrameSet = IsParentAFrameSet(webContainer);
     mPrt->mPrintObject->mFrameType = mPrt->mIsParentAFrameSet ? eFrameSet : eDoc;
     // Build the "tree" of PrintObjects
     BuildDocTree(mPrt->mPrintObject->mDocShell, &mPrt->mPrintDocList,
                  mPrt->mPrintObject);
   }
   if (!aIsPrintPreview) {
     SetIsPrinting(true);
   }
   // XXX This isn't really correct...
   if (!mPrt->mPrintObject->mDocument ||
       !mPrt->mPrintObject->mDocument->GetRootElement())
     return NS_ERROR_GFX_PRINTER_STARTDOC;
   // Create the linkage from the sub-docs back to the content element
   // in the parent document
   MapContentToWebShells(mPrt->mPrintObject, mPrt->mPrintObject);
   mPrt->mIsIFrameSelected = IsThereAnIFrameSelected(webContainer, mPrt->mCurrentFocusWin, mPrt->mIsParentAFrameSet);
   // Setup print options for UI
   if (mPrt->mIsParentAFrameSet) {
     if (mPrt->mCurrentFocusWin) {
       mPrt->mPrintSettings->SetHowToEnableFrameUI(nsIPrintSettings::kFrameEnableAll);
     } else {
       mPrt->mPrintSettings->SetHowToEnableFrameUI(nsIPrintSettings::kFrameEnableAsIsAndEach);
     }
   } else {
     mPrt->mPrintSettings->SetHowToEnableFrameUI(nsIPrintSettings::kFrameEnableNone);
   }
   // Now determine how to set up the Frame print UI
   mPrt->mPrintSettings->SetPrintOptions(nsIPrintSettings::kEnableSelectionRB,
                                         isSelection || mPrt->mIsIFrameSelected);
   nsCOMPtr<nsIDeviceContextSpec> devspec
     (do_CreateInstance("@mozilla.org/gfx/devicecontextspec;1", &rv));
   NS_ENSURE_SUCCESS(rv, rv);
   nsScriptSuppressor scriptSuppressor(this);
   if (!aIsPrintPreview) {
 #ifdef DEBUG
     mPrt->mDebugFilePtr = mDebugFile;
 #endif
     scriptSuppressor.Suppress();
     bool printSilently;
     mPrt->mPrintSettings->GetPrintSilent(&printSilently);
     // Check prefs for a default setting as to whether we should print silently
     printSilently =
       Preferences::GetBool("print.always_print_silent", printSilently);
     // 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 (!printSilently) {
       nsCOMPtr<nsIPrintingPromptService> printPromptService(do_GetService(kPrintingPromptService));
       if (printPromptService) {
         nsIDOMWindow *domWin = mDocument->GetWindow();
         NS_ENSURE_TRUE(domWin, NS_ERROR_FAILURE);
         // 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
         //
         nsCOMPtr<nsIWebBrowserPrint> wbp(do_QueryInterface(mDocViewerPrint));
         rv = printPromptService->ShowPrintDialog(domWin, wbp,
                                                  mPrt->mPrintSettings);
         //
         // 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 (!mPrt) {
           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 (mPrt->mPrintSettings) {
             // The user might have changed shrink-to-fit in the print dialog, so update our copy of its state
             mPrt->mPrintSettings->GetShrinkToFit(&mPrt->mShrinkToFit);
           }
         } 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 {
       // Call any code that requires a run of the event loop.
       rv = mPrt->mPrintSettings->SetupSilentPrinting();
     }
     // Check explicitly for abort because it's expected
     if (rv == NS_ERROR_ABORT)
       return rv;
     NS_ENSURE_SUCCESS(rv, rv);
   }
   rv = devspec->Init(nullptr, mPrt->mPrintSettings, aIsPrintPreview);
   NS_ENSURE_SUCCESS(rv, rv);
   mPrt->mPrintDC = new nsDeviceContext();
   rv = mPrt->mPrintDC->InitForPrinting(devspec);
   NS_ENSURE_SUCCESS(rv, rv);
   if (aIsPrintPreview) {
     mPrt->mPrintSettings->SetPrintFrameType(nsIPrintSettings::kFramesAsIs);
     // override any UI that wants to PrintPreview any selection or page range
     // we want to view every page in PrintPreview each time
     mPrt->mPrintSettings->SetPrintRange(nsIPrintSettings::kRangeAllPages);
   } else {
     // Always check and set the print settings first and then fall back
     // onto the PrintService if there isn't a PrintSettings
     //
     // Posiible Usage values:
     //   nsIPrintSettings::kUseInternalDefault
     //   nsIPrintSettings::kUseSettingWhenPossible
     //
     // NOTE: The consts are the same for PrintSettings and PrintSettings
     int16_t printFrameTypeUsage = nsIPrintSettings::kUseSettingWhenPossible;
     mPrt->mPrintSettings->GetPrintFrameTypeUsage(&printFrameTypeUsage);
     // Ok, see if we are going to use our value and override the default
     if (printFrameTypeUsage == nsIPrintSettings::kUseSettingWhenPossible) {
       // Get the Print Options/Settings PrintFrameType to see what is preferred
       int16_t printFrameType = nsIPrintSettings::kEachFrameSep;
       mPrt->mPrintSettings->GetPrintFrameType(&printFrameType);
       // Don't let anybody do something stupid like try to set it to
       // kNoFrames when we are printing a FrameSet
       if (printFrameType == nsIPrintSettings::kNoFrames) {
         mPrt->mPrintFrameType = nsIPrintSettings::kEachFrameSep;
         mPrt->mPrintSettings->SetPrintFrameType(mPrt->mPrintFrameType);
       } else {
         // First find out from the PrinService what options are available
         // to us for Printing FrameSets
         int16_t howToEnableFrameUI;
         mPrt->mPrintSettings->GetHowToEnableFrameUI(&howToEnableFrameUI);
         if (howToEnableFrameUI != nsIPrintSettings::kFrameEnableNone) {
           switch (howToEnableFrameUI) {
           case nsIPrintSettings::kFrameEnableAll:
             mPrt->mPrintFrameType = printFrameType;
             break;
           case nsIPrintSettings::kFrameEnableAsIsAndEach:
             if (printFrameType != nsIPrintSettings::kSelectedFrame) {
               mPrt->mPrintFrameType = printFrameType;
             } else { // revert back to a good value
               mPrt->mPrintFrameType = nsIPrintSettings::kEachFrameSep;
             }
             break;
           } // switch
           mPrt->mPrintSettings->SetPrintFrameType(mPrt->mPrintFrameType);
         }
       }
     } else {
       mPrt->mPrintSettings->GetPrintFrameType(&mPrt->mPrintFrameType);
     }
   }
   if (mPrt->mPrintFrameType == nsIPrintSettings::kEachFrameSep) {
     CheckForChildFrameSets(mPrt->mPrintObject);
   }
   if (NS_FAILED(EnablePOsForPrinting())) {
     return NS_ERROR_FAILURE;
   }
   // Attach progressListener to catch network requests.
   nsCOMPtr<nsIWebProgress> webProgress = do_QueryInterface(mPrt->mPrintObject->mDocShell);
   webProgress->AddProgressListener(
     static_cast<nsIWebProgressListener*>(this),
     nsIWebProgress::NOTIFY_STATE_REQUEST);
   mLoadCounter = 0;
   mDidLoadDataForPrinting = false;
   if (aIsPrintPreview) {
     bool notifyOnInit = false;
     ShowPrintProgress(false, notifyOnInit);
     // Very important! Turn Off scripting
     TurnScriptingOn(false);
     if (!notifyOnInit) {
       InstallPrintPreviewListener();
       rv = InitPrintDocConstruction(false);
     } else {
       rv = NS_OK;
     }
   } else {
     bool doNotify;
     ShowPrintProgress(true, doNotify);
     if (!doNotify) {
       // Print listener setup...
       mPrt->OnStartPrinting();
       rv = InitPrintDocConstruction(false);
     }
   }
   // We will enable scripting later after printing has finished.
   scriptSuppressor.Disconnect();
   return NS_OK;
 }
 //---------------------------------------------------------------------------------
 NS_IMETHODIMP
 nsPrintEngine::Print(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.
   nsCOMPtr<nsIDOMDocument> doc =
     do_QueryInterface(mPrtPreview && mPrtPreview->mPrintObject ?
                         mPrtPreview->mPrintObject->mDocument : mDocument);
   return CommonPrint(false, aPrintSettings, aWebProgressListener, doc);
 }
 NS_IMETHODIMP
 nsPrintEngine::PrintPreview(nsIPrintSettings* aPrintSettings,
                                  nsIDOMWindow *aChildDOMWin,
                                  nsIWebProgressListener* aWebProgressListener)
 {
   // Get the DocShell and see if it is busy
   // (We can't Print Preview this document if it is still busy)
   nsCOMPtr<nsIDocShell> docShell(do_QueryReferent(mContainer));
   NS_ENSURE_STATE(docShell);
   uint32_t busyFlags = nsIDocShell::BUSY_FLAGS_NONE;
   if (NS_FAILED(docShell->GetBusyFlags(&busyFlags)) ||
       busyFlags != nsIDocShell::BUSY_FLAGS_NONE) {
     CloseProgressDialog(aWebProgressListener);
     ShowPrintErrorDialog(NS_ERROR_GFX_PRINTER_DOC_IS_BUSY, false);
     return NS_ERROR_FAILURE;
   }
   NS_ENSURE_STATE(aChildDOMWin);
   nsCOMPtr<nsIDOMDocument> doc;
   aChildDOMWin->GetDocument(getter_AddRefs(doc));
   NS_ENSURE_STATE(doc);
   // Document is not busy -- go ahead with the Print Preview
   return CommonPrint(true, aPrintSettings, aWebProgressListener, doc);
 }
 //----------------------------------------------------------------------------------
 /* readonly attribute boolean isFramesetDocument; */
 NS_IMETHODIMP
 nsPrintEngine::GetIsFramesetDocument(bool *aIsFramesetDocument)
 {
   nsCOMPtr<nsIDocShell> webContainer(do_QueryReferent(mContainer));
   *aIsFramesetDocument = IsParentAFrameSet(webContainer);
   return NS_OK;
 }
 //----------------------------------------------------------------------------------
 /* readonly attribute boolean isIFrameSelected; */
 NS_IMETHODIMP
 nsPrintEngine::GetIsIFrameSelected(bool *aIsIFrameSelected)
 {
   *aIsIFrameSelected = false;
   // Get the docshell for this documentviewer
   nsCOMPtr<nsIDocShell> webContainer(do_QueryReferent(mContainer));
   // Get the currently focused window
   nsCOMPtr<nsIDOMWindow> currentFocusWin = FindFocusedDOMWindow();
   if (currentFocusWin && webContainer) {
     // Get whether the doc contains a frameset
     // Also, check to see if the currently focus docshell
     // is a child of this docshell
     bool isParentFrameSet;
     *aIsIFrameSelected = IsThereAnIFrameSelected(webContainer, currentFocusWin, isParentFrameSet);
   }
   return NS_OK;
 }
 //----------------------------------------------------------------------------------
 /* readonly attribute boolean isRangeSelection; */
 NS_IMETHODIMP
 nsPrintEngine::GetIsRangeSelection(bool *aIsRangeSelection)
 {
   // Get the currently focused window
   nsCOMPtr<nsIDOMWindow> currentFocusWin = FindFocusedDOMWindow();
   *aIsRangeSelection = IsThereARangeSelection(currentFocusWin);
   return NS_OK;
 }
 //----------------------------------------------------------------------------------
 /* readonly attribute boolean isFramesetFrameSelected; */
 NS_IMETHODIMP
 nsPrintEngine::GetIsFramesetFrameSelected(bool *aIsFramesetFrameSelected)
 {
   // Get the currently focused window
   nsCOMPtr<nsIDOMWindow> currentFocusWin = FindFocusedDOMWindow();
   *aIsFramesetFrameSelected = currentFocusWin != nullptr;
   return NS_OK;
 }
 //----------------------------------------------------------------------------------
 /* readonly attribute long printPreviewNumPages; */
 NS_IMETHODIMP
 nsPrintEngine::GetPrintPreviewNumPages(int32_t *aPrintPreviewNumPages)
 {
   NS_ENSURE_ARG_POINTER(aPrintPreviewNumPages);
   nsPrintData* prt = nullptr;
   nsIFrame* seqFrame  = nullptr;
   *aPrintPreviewNumPages = 0;
   // When calling this function, the FinishPrintPreview() function might not
   // been called as there are still some
   if (mPrtPreview) {
     prt = mPrtPreview;
   } else {
     prt = mPrt;
   }
   if ((!prt) ||
       NS_FAILED(GetSeqFrameAndCountPagesInternal(prt->mPrintObject, seqFrame, *aPrintPreviewNumPages))) {
     return NS_ERROR_FAILURE;
   }
   return NS_OK;
 }
 //----------------------------------------------------------------------------------
 // Enumerate all the documents for their titles
 NS_IMETHODIMP
 nsPrintEngine::EnumerateDocumentNames(uint32_t* aCount,
                                       char16_t*** aResult)
 {
   NS_ENSURE_ARG(aCount);
   NS_ENSURE_ARG_POINTER(aResult);
   *aCount = 0;
   *aResult = nullptr;
   int32_t     numDocs = mPrt->mPrintDocList.Length();
   char16_t** array   = (char16_t**) nsMemory::Alloc(numDocs * sizeof(char16_t*));
   if (!array)
     return NS_ERROR_OUT_OF_MEMORY;
   for (int32_t i=0;i<numDocs;i++) {
     nsPrintObject* po = mPrt->mPrintDocList.ElementAt(i);
     NS_ASSERTION(po, "nsPrintObject can't be null!");
     nsAutoString docTitleStr;
     nsAutoString docURLStr;
     GetDocumentTitleAndURL(po->mDocument, docTitleStr, docURLStr);
     // Use the URL if the doc is empty
     if (docTitleStr.IsEmpty() && !docURLStr.IsEmpty()) {
       docTitleStr = docURLStr;
     }
     array[i] = ToNewUnicode(docTitleStr);
   }
   *aCount  = numDocs;
   *aResult = array;
   return NS_OK;
 }
 //----------------------------------------------------------------------------------
 /* readonly attribute nsIPrintSettings globalPrintSettings; */
 nsresult
 nsPrintEngine::GetGlobalPrintSettings(nsIPrintSettings **aGlobalPrintSettings)
 {
   NS_ENSURE_ARG_POINTER(aGlobalPrintSettings);
   nsresult rv = NS_ERROR_FAILURE;
   nsCOMPtr<nsIPrintSettingsService> printSettingsService =
     do_GetService(sPrintSettingsServiceContractID, &rv);
   if (NS_SUCCEEDED(rv)) {
     rv = printSettingsService->GetGlobalPrintSettings(aGlobalPrintSettings);
   }
   return rv;
 }
 //----------------------------------------------------------------------------------
 /* readonly attribute boolean doingPrint; */
 NS_IMETHODIMP
 nsPrintEngine::GetDoingPrint(bool *aDoingPrint)
 {
   NS_ENSURE_ARG_POINTER(aDoingPrint);
   *aDoingPrint = mIsDoingPrinting;
   return NS_OK;
 }
 //----------------------------------------------------------------------------------
 /* readonly attribute boolean doingPrintPreview; */
 NS_IMETHODIMP
 nsPrintEngine::GetDoingPrintPreview(bool *aDoingPrintPreview)
 {
   NS_ENSURE_ARG_POINTER(aDoingPrintPreview);
   *aDoingPrintPreview = mIsDoingPrintPreview;
   return NS_OK;
 }
 //----------------------------------------------------------------------------------
 /* readonly attribute nsIPrintSettings currentPrintSettings; */
 NS_IMETHODIMP
 nsPrintEngine::GetCurrentPrintSettings(nsIPrintSettings * *aCurrentPrintSettings)
 {
   NS_ENSURE_ARG_POINTER(aCurrentPrintSettings);
   if (mPrt) {
     *aCurrentPrintSettings = mPrt->mPrintSettings;
   } else if (mPrtPreview) {
     *aCurrentPrintSettings = mPrtPreview->mPrintSettings;
   } else {
     *aCurrentPrintSettings = nullptr;
   }
   NS_IF_ADDREF(*aCurrentPrintSettings);
   return NS_OK;
 }
 //-----------------------------------------------------------------
 //-- Section: Pre-Reflow Methods
 //-----------------------------------------------------------------
 //---------------------------------------------------------------------
 // This method checks to see if there is at least one printer defined
 // and if so, it sets the first printer in the list as the default name
 // in the PrintSettings which is then used for Printer Preview
 nsresult
 nsPrintEngine::CheckForPrinters(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
   nsXPIDLString printerName;
   nsresult rv = aPrintSettings->GetPrinterName(getter_Copies(printerName));
   if (NS_SUCCEEDED(rv) && !printerName.IsEmpty()) {
     return NS_OK;
   }
   // aPrintSettings doesn't have a printer set. Try to fetch the default.
   nsCOMPtr<nsIPrintSettingsService> printSettingsService =
     do_GetService(sPrintSettingsServiceContractID, &rv);
   NS_ENSURE_SUCCESS(rv, rv);
   rv = printSettingsService->GetDefaultPrinterName(getter_Copies(printerName));
   if (NS_SUCCEEDED(rv) && !printerName.IsEmpty()) {
     rv = aPrintSettings->SetPrinterName(printerName.get());
   }
   return rv;
 #endif
 }
 //----------------------------------------------------------------------
 // Set up to use the "pluggable" Print Progress Dialog
 void
 nsPrintEngine::ShowPrintProgress(bool aIsForPrinting, bool& aDoNotify)
 {
   // 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;
   // Assume we can't do progress and then see if we can
   bool showProgresssDialog = false;
   // if it is already being shown then don't bother to find out if it should be
   // so skip this and leave mShowProgressDialog set to FALSE
   if (!mProgressDialogIsShown) {
     showProgresssDialog = Preferences::GetBool("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) {
     mPrt->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) {
       nsPIDOMWindow *domWin = mDocument->GetWindow();
       if (!domWin) return;
       nsCOMPtr<nsIDocShell> docShell = domWin->GetDocShell();
       if (!docShell) return;
       nsCOMPtr<nsIDocShellTreeOwner> owner;
       docShell->GetTreeOwner(getter_AddRefs(owner));
       nsCOMPtr<nsIWebBrowserChrome> browserChrome = do_GetInterface(owner);
       if (!browserChrome) return;
       bool isModal = true;
       browserChrome->IsWindowModal(&isModal);
       if (isModal) {
         // Showing a print progress dialog when printing a modal window
         // isn't supported. See bug 301560.
         return;
       }
       nsCOMPtr<nsIWebProgressListener> printProgressListener;
       nsCOMPtr<nsIWebBrowserPrint> wbp(do_QueryInterface(mDocViewerPrint));
       nsresult rv = printPromptService->ShowProgress(domWin, wbp, mPrt->mPrintSettings, this, aIsForPrinting,
                                                      getter_AddRefs(printProgressListener),
                                                      getter_AddRefs(mPrt->mPrintProgressParams),
                                                      &aDoNotify);
       if (NS_SUCCEEDED(rv)) {
         if (printProgressListener && mPrt->mPrintProgressParams) {
           mPrt->mPrintProgressListeners.AppendObject(printProgressListener);
           SetDocAndURLIntoProgress(mPrt->mPrintObject, mPrt->mPrintProgressParams);
         }
       }
     }
   }
 }
 //---------------------------------------------------------------------
 bool
 nsPrintEngine::IsThereARangeSelection(nsIDOMWindow* aDOMWin)
 {
   if (mDisallowSelectionPrint)
     return false;
   nsCOMPtr<nsIPresShell> presShell;
   if (aDOMWin) {
     nsCOMPtr<nsPIDOMWindow> window(do_QueryInterface(aDOMWin));
     presShell = window->GetDocShell()->GetPresShell();
   }
   if (!presShell)
     return false;
   // check here to see if there is a range selection
   // so we know whether to turn on the "Selection" radio button
   Selection* selection =
     presShell->GetCurrentSelection(nsISelectionController::SELECTION_NORMAL);
   if (!selection) {
     return false;
   }
   int32_t rangeCount = selection->GetRangeCount();
   if (!rangeCount) {
     return false;
   }
   if (rangeCount > 1) {
     return true;
   }
   // check to make sure it isn't an insertion selection
   return selection->GetRangeAt(0) && !selection->IsCollapsed();
 }
 //---------------------------------------------------------------------
 bool
 nsPrintEngine::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<nsIDOMDocument> domDoc = do_GetInterface(aParent);
   nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
   if (doc) {
     nsIContent *rootElement = doc->GetRootElement();
     if (rootElement) {
       isFrameSet = HasFramesetChild(rootElement);
     }
   }
   return isFrameSet;
 }
 //---------------------------------------------------------------------
 // Recursively build a list of sub documents to be printed
 // that mirrors the document tree
 void
 nsPrintEngine::BuildDocTree(nsIDocShell *      aParentNode,
                             nsTArray<nsPrintObject*> * aDocList,
                             nsPrintObject *            aPO)
 {
   NS_ASSERTION(aParentNode, "Pointer is null!");
   NS_ASSERTION(aDocList, "Pointer is null!");
   NS_ASSERTION(aPO, "Pointer is null!");
   int32_t childWebshellCount;
   aParentNode->GetChildCount(&childWebshellCount);
   if (childWebshellCount > 0) {
     for (int32_t i=0;i<childWebshellCount;i++) {
       nsCOMPtr<nsIDocShellTreeItem> child;
       aParentNode->GetChildAt(i, getter_AddRefs(child));
       nsCOMPtr<nsIDocShell> childAsShell(do_QueryInterface(child));
       nsCOMPtr<nsIContentViewer>  viewer;
       childAsShell->GetContentViewer(getter_AddRefs(viewer));
       if (viewer) {
         nsCOMPtr<nsIContentViewerFile> viewerFile(do_QueryInterface(viewer));
         if (viewerFile) {
           nsCOMPtr<nsIDOMDocument> doc = do_GetInterface(childAsShell);
           nsPrintObject * po = new nsPrintObject();
           po->mParent = aPO;
           nsresult rv = po->Init(childAsShell, doc, aPO->mPrintPreview);
           if (NS_FAILED(rv))
             NS_NOTREACHED("Init failed?");
           aPO->mKids.AppendElement(po);
           aDocList->AppendElement(po);
           BuildDocTree(childAsShell, aDocList, po);
         }
       }
     }
   }
 }
 //---------------------------------------------------------------------
 void
 nsPrintEngine::GetDocumentTitleAndURL(nsIDocument* aDoc,
                                       nsAString&   aTitle,
                                       nsAString&   aURLStr)
 {
   NS_ASSERTION(aDoc, "Pointer is null!");
   aTitle.Truncate();
   aURLStr.Truncate();
   nsCOMPtr<nsIDOMDocument> doc = do_QueryInterface(aDoc);
   doc->GetTitle(aTitle);
   nsIURI* url = aDoc->GetDocumentURI();
   if (!url) return;
   nsCOMPtr<nsIURIFixup> urifixup(do_GetService(NS_URIFIXUP_CONTRACTID));
   if (!urifixup) return;
   nsCOMPtr<nsIURI> exposableURI;
   urifixup->CreateExposableURI(url, getter_AddRefs(exposableURI));
   if (!exposableURI) return;
   nsAutoCString urlCStr;
   exposableURI->GetSpec(urlCStr);
   nsresult rv;
   nsCOMPtr<nsITextToSubURI> textToSubURI =
     do_GetService(NS_ITEXTTOSUBURI_CONTRACTID, &rv);
   if (NS_FAILED(rv)) return;
   textToSubURI->UnEscapeURIForUI(NS_LITERAL_CSTRING("UTF-8"),
                                  urlCStr, aURLStr);
 }
 //---------------------------------------------------------------------
 // The walks the PO tree and for each document it walks the content
 // tree looking for any content that are sub-shells
 //
 // It then sets the mContent pointer in the "found" PO object back to the
 // the document that contained it.
 void
 nsPrintEngine::MapContentToWebShells(nsPrintObject* aRootPO,
                                      nsPrintObject* aPO)
 {
   NS_ASSERTION(aRootPO, "Pointer is null!");
   NS_ASSERTION(aPO, "Pointer is null!");
   // Recursively walk the content from the root item
   // XXX Would be faster to enumerate the subdocuments, although right now
   //     nsIDocument doesn't expose quite what would be needed.
   nsCOMPtr<nsIContentViewer> viewer;
   aPO->mDocShell->GetContentViewer(getter_AddRefs(viewer));
   if (!viewer) return;
   nsCOMPtr<nsIDOMDocument> domDoc;
   viewer->GetDOMDocument(getter_AddRefs(domDoc));
   nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
   if (!doc) return;
   Element* rootElement = doc->GetRootElement();
   if (rootElement) {
     MapContentForPO(aPO, rootElement);
   } else {
     NS_WARNING("Null root content on (sub)document.");
   }
   // Continue recursively walking the chilren of this PO
   for (uint32_t i=0;i<aPO->mKids.Length();i++) {
     MapContentToWebShells(aRootPO, aPO->mKids[i]);
   }
 }
 //-------------------------------------------------------
 // A Frame's sub-doc may contain content or a FrameSet
 // When it contains a FrameSet the mFrameType for the PrintObject
 // is always set to an eFrame. Which is fine when printing "AsIs"
 // but is incorrect when when printing "Each Frame Separately".
 // When printing "Each Frame Separately" the Frame really acts like
 // a frameset.
 //
 // This method walks the PO tree and checks to see if the PrintObject is
 // an eFrame and has children that are eFrames (meaning it's a Frame containing a FrameSet)
 // If so, then the mFrameType need to be changed to eFrameSet
 //
 // Also note: We only want to call this we are printing "Each Frame Separately"
 //            when printing "As Is" leave it as an eFrame
 void
 nsPrintEngine::CheckForChildFrameSets(nsPrintObject* aPO)
 {
   NS_ASSERTION(aPO, "Pointer is null!");
   // Continue recursively walking the chilren of this PO
   bool hasChildFrames = false;
   for (uint32_t i=0;i<aPO->mKids.Length();i++) {
     nsPrintObject* po = aPO->mKids[i];
     if (po->mFrameType == eFrame) {
       hasChildFrames = true;
       CheckForChildFrameSets(po);
     }
   }
   if (hasChildFrames && aPO->mFrameType == eFrame) {
     aPO->mFrameType = eFrameSet;
   }
 }
 //---------------------------------------------------------------------
 // This method is key to the entire print mechanism.
 //
 // This "maps" or figures out which sub-doc represents a
 // given Frame or IFrame in its parent sub-doc.
 //
 // So the Mcontent pointer in the child sub-doc points to the
 // content in the its parent document, that caused it to be printed.
 // This is used later to (after reflow) to find the absolute location
 // of the sub-doc on its parent's page frame so it can be
 // printed in the correct location.
 //
 // This method recursvely "walks" the content for a document finding
 // all the Frames and IFrames, then sets the "mFrameType" data member
 // which tells us what type of PO we have
 void
 nsPrintEngine::MapContentForPO(nsPrintObject*   aPO,
                                nsIContent*      aContent)
 {
   NS_PRECONDITION(aPO && aContent, "Null argument");
   nsIDocument* doc = aContent->GetDocument();
   NS_ASSERTION(doc, "Content without a document from a document tree?");
   nsIDocument* subDoc = doc->GetSubDocumentFor(aContent);
   if (subDoc) {
     nsCOMPtr<nsIDocShell> docShell(subDoc->GetDocShell());
     if (docShell) {
       nsPrintObject * po = nullptr;
       int32_t cnt = aPO->mKids.Length();
       for (int32_t i=0;i<cnt;i++) {
         nsPrintObject* kid = aPO->mKids.ElementAt(i);
         if (kid->mDocument == subDoc) {
           po = kid;
           break;
         }
       }
       // XXX If a subdocument has no onscreen presentation, there will be no PO
       //     This is even if there should be a print presentation
       if (po) {
         nsCOMPtr<nsIDOMHTMLFrameElement> frame(do_QueryInterface(aContent));
         // "frame" elements not in a frameset context should be treated
         // as iframes
         if (frame && po->mParent->mFrameType == eFrameSet) {
           po->mFrameType = eFrame;
         } else {
           // Assume something iframe-like, i.e. iframe, object, or embed
           po->mFrameType = eIFrame;
           SetPrintAsIs(po, true);
           NS_ASSERTION(po->mParent, "The root must be a parent");
           po->mParent->mPrintAsIs = true;
         }
       }
     }
   }
   // walk children content
   for (nsIContent* child = aContent->GetFirstChild();
        child;
        child = child->GetNextSibling()) {
     MapContentForPO(aPO, child);
   }
 }
 //---------------------------------------------------------------------
 bool
 nsPrintEngine::IsThereAnIFrameSelected(nsIDocShell* aDocShell,
                                        nsIDOMWindow* aDOMWin,
                                        bool& aIsParentFrameSet)
 {
   aIsParentFrameSet = IsParentAFrameSet(aDocShell);
   bool iFrameIsSelected = false;
   if (mPrt && mPrt->mPrintObject) {
     nsPrintObject* po = FindPrintObjectByDOMWin(mPrt->mPrintObject, aDOMWin);
     iFrameIsSelected = po && po->mFrameType == eIFrame;
   } else {
     // First, check to see if we are a frameset
     if (!aIsParentFrameSet) {
       // Check to see if there is a currenlt focused frame
       // if so, it means the selected frame is either the main docshell
       // or an IFRAME
       if (aDOMWin) {
         // Get the main docshell's DOMWin to see if it matches
         // the frame that is selected
         nsCOMPtr<nsIDOMWindow> domWin = do_GetInterface(aDocShell);
         if (domWin != aDOMWin) {
           iFrameIsSelected = true; // we have a selected IFRAME
         }
       }
     }
   }
   return iFrameIsSelected;
 }
 //---------------------------------------------------------------------
 // Recursively sets all the PO items to be printed
 // from the given item down into the tree
 void
 nsPrintEngine::SetPrintPO(nsPrintObject* aPO, bool aPrint)
 {
   NS_ASSERTION(aPO, "Pointer is null!");
   // Set whether to print flag
   aPO->mDontPrint = !aPrint;
   for (uint32_t i=0;i<aPO->mKids.Length();i++) {
     SetPrintPO(aPO->mKids[i], aPrint);
   }
 }
 //---------------------------------------------------------------------
 // This will first use a Title and/or URL from the PrintSettings
 // if one isn't set then it uses the one from the document
 // then if not title is there we will make sure we send something back
 // depending on the situation.
 void
 nsPrintEngine::GetDisplayTitleAndURL(nsPrintObject*   aPO,
                                      nsAString&       aTitle,
                                      nsAString&       aURLStr,
                                      eDocTitleDefault aDefType)
 {
   NS_ASSERTION(aPO, "Pointer is null!");
   if (!mPrt)
     return;
   aTitle.Truncate();
   aURLStr.Truncate();
   // First check to see if the PrintSettings has defined an alternate title
   // and use that if it did
   if (mPrt->mPrintSettings) {
     char16_t * docTitleStrPS = nullptr;
     char16_t * docURLStrPS   = nullptr;
     mPrt->mPrintSettings->GetTitle(&docTitleStrPS);
     mPrt->mPrintSettings->GetDocURL(&docURLStrPS);
     if (docTitleStrPS) {
       aTitle = docTitleStrPS;
     }
     if (docURLStrPS) {
       aURLStr = docURLStrPS;
     }
     nsMemory::Free(docTitleStrPS);
     nsMemory::Free(docURLStrPS);
   }
   nsAutoString docTitle;
   nsAutoString docUrl;
   GetDocumentTitleAndURL(aPO->mDocument, docTitle, docUrl);
   if (aURLStr.IsEmpty() && !docUrl.IsEmpty()) {
     aURLStr = docUrl;
   }
   if (aTitle.IsEmpty()) {
     if (!docTitle.IsEmpty()) {
       aTitle = docTitle;
     } else {
       if (aDefType == eDocTitleDefURLDoc) {
         if (!aURLStr.IsEmpty()) {
           aTitle = aURLStr;
         } else if (mPrt->mBrandName) {
           aTitle = mPrt->mBrandName;
         }
       }
     }
   }
 }
 //---------------------------------------------------------------------
 nsresult nsPrintEngine::DocumentReadyForPrinting()
 {
   if (mPrt->mPrintFrameType == nsIPrintSettings::kEachFrameSep) {
     CheckForChildFrameSets(mPrt->mPrintObject);
   }
   //
   // 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
     DonePrintingPages(nullptr, rv);
   }
   return rv;
 }
 /** ---------------------------------------------------
  *  Cleans up when an error occurred
  */
 nsresult nsPrintEngine::CleanupOnFailure(nsresult aResult, bool aIsPrinting)
 {
   PR_PL(("****  Failed %s - rv 0x%X", aIsPrinting?"Printing":"Print Preview", aResult));
   /* cleanup... */
   if (mPagePrintTimer) {
     mPagePrintTimer->Stop();
     NS_RELEASE(mPagePrintTimer);
   }
   if (aIsPrinting) {
     SetIsPrinting(false);
   } else {
     SetIsPrintPreview(false);
     SetIsCreatingPrintPreview(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) {
     ShowPrintErrorDialog(aResult, aIsPrinting);
   }
   FirePrintCompletionEvent();
   return aResult;
 }
 //---------------------------------------------------------------------
 void
 nsPrintEngine::ShowPrintErrorDialog(nsresult aPrintError, bool aIsPrinting)
 {
   nsAutoCString stringName;
   nsXPIDLString msg, title;
   nsresult rv = NS_OK;
   switch(aPrintError)
   {
 #define ENTITY_FOR_ERROR(label) \
     case NS_ERROR_##label: stringName.AssignLiteral("PERR_" #label); break
     ENTITY_FOR_ERROR(GFX_PRINTER_NO_PRINTER_AVAILABLE);
     ENTITY_FOR_ERROR(GFX_PRINTER_NAME_NOT_FOUND);
     ENTITY_FOR_ERROR(GFX_PRINTER_COULD_NOT_OPEN_FILE);
     ENTITY_FOR_ERROR(GFX_PRINTER_STARTDOC);
     ENTITY_FOR_ERROR(GFX_PRINTER_ENDDOC);
     ENTITY_FOR_ERROR(GFX_PRINTER_STARTPAGE);
     ENTITY_FOR_ERROR(GFX_PRINTER_DOC_IS_BUSY);
     ENTITY_FOR_ERROR(ABORT);
     ENTITY_FOR_ERROR(NOT_AVAILABLE);
     ENTITY_FOR_ERROR(NOT_IMPLEMENTED);
     ENTITY_FOR_ERROR(OUT_OF_MEMORY);
     ENTITY_FOR_ERROR(UNEXPECTED);
     default:
     ENTITY_FOR_ERROR(FAILURE);
 #undef ENTITY_FOR_ERROR
   }
   if (!aIsPrinting) {
     // Try first with _PP suffix.
     stringName.AppendLiteral("_PP");
     rv = nsContentUtils::GetLocalizedString(
              nsContentUtils::ePRINTING_PROPERTIES, stringName.get(), msg);
     if (NS_FAILED(rv)) {
       stringName.Truncate(stringName.Length() - 3);
     }
   }
   if (aIsPrinting || NS_FAILED(rv)) {
     rv = nsContentUtils::GetLocalizedString(
              nsContentUtils::ePRINTING_PROPERTIES, stringName.get(), msg);
   }
   if (NS_FAILED(rv)) {
     return;
   }
   rv = nsContentUtils::GetLocalizedString(
            nsContentUtils::ePRINTING_PROPERTIES,
            aIsPrinting ? "print_error_dialog_title"
                        : "printpreview_error_dialog_title",
            title);
   if (NS_FAILED(rv)) {
     return;
   }
   nsCOMPtr<nsIWindowWatcher> wwatch =
     do_GetService(NS_WINDOWWATCHER_CONTRACTID, &rv);
   if (NS_FAILED(rv)) {
     return;
   }
   nsCOMPtr<nsIDOMWindow> active;
   wwatch->GetActiveWindow(getter_AddRefs(active));
   nsCOMPtr<nsIPrompt> dialog;
   /* |GetNewPrompter| allows that |active| is |nullptr|
    * (see bug 234982 ("nsPrintEngine::ShowPrintErrorDialog() fails in many cases")) */
   wwatch->GetNewPrompter(active, getter_AddRefs(dialog));
   if (!dialog) {
     return;
   }
   dialog->Alert(title.get(), msg.get());
 }
 //-----------------------------------------------------------------
 //-- Section: Reflow Methods
 //-----------------------------------------------------------------
 nsresult
 nsPrintEngine::ReconstructAndReflow(bool doSetPixelScale)
 {
 #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 (kPrintingLogMod && kPrintingLogMod->level == DUMP_LAYOUT_LEVEL) {
     RemoveFilesInDir(".\\");
     gDumpFileNameCnt   = 0;
     gDumpLOFileNameCnt = 0;
   }
 #endif
   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->mDontPrint || po->mInvisible) {
       continue;
     }
     UpdateZoomRatio(po, doSetPixelScale);
     po->mPresContext->SetPageScale(po->mZoomRatio);
     // Calculate scale factor from printer to screen
     float printDPI = float(mPrt->mPrintDC->AppUnitsPerCSSInch()) /
                      float(mPrt->mPrintDC->AppUnitsPerDevPixel());
     po->mPresContext->SetPrintPreviewScale(mScreenDPI / printDPI);
     po->mPresShell->ReconstructFrames();
     // 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;
       }
     }
     po->mPresShell->FlushPendingNotifications(Flush_Layout);
     nsresult rv = UpdateSelectionAndShrinkPrintObject(po, documentIsTopLevel);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   return NS_OK;
 }
 //-------------------------------------------------------
 nsresult
 nsPrintEngine::SetupToPrintContent()
 {
   nsresult rv;
   bool didReconstruction = false;
   // If some new content got loaded since the initial reflow rebuild
   // everything.
   if (mDidLoadDataForPrinting) {
     rv = ReconstructAndReflow(DoSetPixelScale());
     didReconstruction = true;
     NS_ENSURE_SUCCESS(rv, rv);
   }
   // 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 (mPrt->mShrinkToFit && !ppIsShrinkToFit) {
     // Now look for the PO that has the smallest percent for shrink to fit
     if (mPrt->mPrintDocList.Length() > 1 && mPrt->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
         mPrt->mShrinkRatio = smallestPO->mShrinkRatio;
       }
     } else {
       // Single document so use the Shrink as calculated for the PO
       mPrt->mShrinkRatio = mPrt->mPrintObject->mShrinkRatio;
     }
     if (mPrt->mShrinkRatio < 0.998f) {
       rv = ReconstructAndReflow(true);
       didReconstruction = true;
       NS_ENSURE_SUCCESS(rv, rv);
     }
 #ifdef PR_LOGGING
     float calcRatio = 0.0f;
     if (mPrt->mPrintDocList.Length() > 1 && mPrt->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 = mPrt->mPrintObject->mShrinkRatio;
     }
     PR_PL(("**************************************************************************\n"));
     PR_PL(("STF Ratio is: %8.5f Effective Ratio: %8.5f Diff: %8.5f\n", mPrt->mShrinkRatio, calcRatio,  mPrt->mShrinkRatio-calcRatio));
     PR_PL(("**************************************************************************\n"));
 #endif
   }
   // If the frames got reconstructed and reflowed the number of pages might
   // has changed.
   if (didReconstruction) {
     FirePrintPreviewUpdateEvent();
   }
   DUMP_DOC_LIST(("\nAfter Reflow------------------------------------------"));
   PR_PL(("\n"));
   PR_PL(("-------------------------------------------------------\n"));
   PR_PL(("\n"));
   CalcNumPrintablePages(mPrt->mNumPrintablePages);
   PR_PL(("--- Printing %d pages\n", mPrt->mNumPrintablePages));
   DUMP_DOC_TREELAYOUT;
   // Print listener setup...
   if (mPrt != nullptr) {
     mPrt->OnStartPrinting();
   }
   char16_t* fileName = nullptr;
   // check to see if we are printing to a file
   bool isPrintToFile = false;
   mPrt->mPrintSettings->GetPrintToFile(&isPrintToFile);
   if (isPrintToFile) {
   // On some platforms The BeginDocument needs to know the name of the file
   // and it uses the PrintService to get it, so we need to set it into the PrintService here
     mPrt->mPrintSettings->GetToFileName(&fileName);
   }
   nsAutoString docTitleStr;
   nsAutoString docURLStr;
   GetDisplayTitleAndURL(mPrt->mPrintObject, docTitleStr, docURLStr, eDocTitleDefURLDoc);
   int32_t startPage = 1;
   int32_t endPage   = mPrt->mNumPrintablePages;
   int16_t printRangeType = nsIPrintSettings::kRangeAllPages;
   mPrt->mPrintSettings->GetPrintRange(&printRangeType);
   if (printRangeType == nsIPrintSettings::kRangeSpecifiedPageRange) {
     mPrt->mPrintSettings->GetStartPageRange(&startPage);
     mPrt->mPrintSettings->GetEndPageRange(&endPage);
     if (endPage > mPrt->mNumPrintablePages) {
       endPage = mPrt->mNumPrintablePages;
     }
   }
   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 (!mPrt->mDebugFilePtr && mIsDoingPrinting) {
     rv = mPrt->mPrintDC->BeginDocument(docTitleStr, fileName, startPage, endPage);
   }
   if (mIsCreatingPrintPreview) {
     // Copy docTitleStr and docURLStr to the pageSequenceFrame, to be displayed
     // in the header
     nsIPageSequenceFrame *seqFrame = mPrt->mPrintObject->mPresShell->GetPageSequenceFrame();
     if (seqFrame) {
       seqFrame->StartPrint(mPrt->mPrintObject->mPresContext,
                            mPrt->mPrintSettings, docTitleStr, docURLStr);
     }
   }
   PR_PL(("****************** Begin Document ************************\n"));
   NS_ENSURE_SUCCESS(rv, rv);
   // This will print the docshell document
   // when it completes asynchronously in the DonePrintingPages method
   // it will check to see if there are more docshells to be printed and
   // then PrintDocContent will be called again.
   if (mIsDoingPrinting) {
     PrintDocContent(mPrt->mPrintObject, rv); // ignore return value
   }
   return rv;
 }
 //-------------------------------------------------------
 // Recursively reflow each sub-doc and then calc
 // all the frame locations of the sub-docs
 nsresult
 nsPrintEngine::ReflowDocList(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()) {
       SetPrintPO(aPO, false);
       aPO->mInvisible = true;
       return NS_OK;
     }
   }
   UpdateZoomRatio(aPO, aSetPixelScale);
   nsresult rv;
   // Reflow the PO
   rv = ReflowPrintObject(aPO);
   NS_ENSURE_SUCCESS(rv, rv);
   int32_t cnt = aPO->mKids.Length();
   for (int32_t i=0;i<cnt;i++) {
     rv = ReflowDocList(aPO->mKids[i], aSetPixelScale);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   return NS_OK;
 }
 void
 nsPrintEngine::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 (mIsDoingPrintPreview && !mIsDoingPrinting) {
     nsCOMPtr<nsIContentViewer> cv = do_QueryInterface(mDocViewerPrint);
     (new AsyncEventDispatcher(
        cv->GetDocument(), NS_LITERAL_STRING("printPreviewUpdate"), true, true)
     )->RunDOMEventWhenSafe();
   }
 }
 nsresult
 nsPrintEngine::InitPrintDocConstruction(bool aHandleError)
 {
   nsresult rv;
   rv = ReflowDocList(mPrt->mPrintObject, DoSetPixelScale());
   NS_ENSURE_SUCCESS(rv, rv);
   FirePrintPreviewUpdateEvent();
   if (mLoadCounter == 0) {
     AfterNetworkPrint(aHandleError);
   }
   return rv;
 }
 nsresult
 nsPrintEngine::AfterNetworkPrint(bool aHandleError)
 {
   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 (aHandleError && NS_FAILED(rv)) {
     CleanupOnFailure(rv, !mIsDoingPrinting);
   }
   return rv;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // nsIWebProgressListener
 NS_IMETHODIMP
 nsPrintEngine::OnStateChange(nsIWebProgress* aWebProgress,
                              nsIRequest* aRequest,
                              uint32_t aStateFlags,
                              nsresult aStatus)
 {
   nsAutoCString name;
   aRequest->GetName(name);
   if (name.Equals("about:document-onload-blocker")) {
     return NS_OK;
   }
   if (aStateFlags & STATE_START) {
     nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest);
     ++mLoadCounter;
   } else if (aStateFlags & STATE_STOP) {
     mDidLoadDataForPrinting = true;
     --mLoadCounter;
     // If all resources are loaded, then do a small timeout and if there
     // are still no new requests, then another reflow.
     if (mLoadCounter == 0) {
       AfterNetworkPrint(true);
     }
   }
   return NS_OK;
 }
 NS_IMETHODIMP
 nsPrintEngine::OnProgressChange(nsIWebProgress* aWebProgress,
                                  nsIRequest* aRequest,
                                  int32_t aCurSelfProgress,
                                  int32_t aMaxSelfProgress,
                                  int32_t aCurTotalProgress,
                                  int32_t aMaxTotalProgress)
 {
   NS_NOTREACHED("notification excluded in AddProgressListener(...)");
   return NS_OK;
 }
 NS_IMETHODIMP
 nsPrintEngine::OnLocationChange(nsIWebProgress* aWebProgress,
                                 nsIRequest* aRequest,
                                 nsIURI* aLocation,
                                 uint32_t aFlags)
 {
   NS_NOTREACHED("notification excluded in AddProgressListener(...)");
   return NS_OK;
 }
 NS_IMETHODIMP
 nsPrintEngine::OnStatusChange(nsIWebProgress *aWebProgress,
                               nsIRequest *aRequest,
                               nsresult aStatus,
                               const char16_t *aMessage)
 {
   NS_NOTREACHED("notification excluded in AddProgressListener(...)");
   return NS_OK;
 }
 NS_IMETHODIMP
 nsPrintEngine::OnSecurityChange(nsIWebProgress *aWebProgress,
                                   nsIRequest *aRequest,
                                   uint32_t aState)
 {
   NS_NOTREACHED("notification excluded in AddProgressListener(...)");
   return NS_OK;
 }
 //-------------------------------------------------------
 void
 nsPrintEngine::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) {
     float ratio;
     if (mPrt->mPrintFrameType == nsIPrintSettings::kFramesAsIs || mPrt->mPrintFrameType == nsIPrintSettings::kNoFrames) {
       ratio = mPrt->mShrinkRatio - 0.005f; // round down
     } else {
       ratio = aPO->mShrinkRatio - 0.005f; // round down
     }
     aPO->mZoomRatio = ratio;
   } else if (!mPrt->mShrinkToFit) {
     double scaling;
     mPrt->mPrintSettings->GetScaling(&scaling);
     aPO->mZoomRatio = float(scaling);
   }
 }
 nsresult
 nsPrintEngine::UpdateSelectionAndShrinkPrintObject(nsPrintObject* aPO,
                                                    bool aDocumentIsTopLevel)
 {
   nsCOMPtr<nsIPresShell> displayShell = aPO->mDocShell->GetPresShell();
   // Transfer Selection Ranges to the new Print PresShell
   nsRefPtr<Selection> selection, selectionPS;
   // It's okay if there is no display shell, just skip copying the selection
   if (displayShell) {
     selection = displayShell->GetCurrentSelection(nsISelectionController::SELECTION_NORMAL);
   }
   selectionPS = aPO->mPresShell->GetCurrentSelection(nsISelectionController::SELECTION_NORMAL);
   // Reset all existing selection ranges that might have been added by calling
   // this function before.
   if (selectionPS) {
     selectionPS->RemoveAllRanges();
   }
   if (selection && selectionPS) {
     int32_t cnt = selection->GetRangeCount();
     int32_t inx;
     for (inx = 0; inx < cnt; ++inx) {
         selectionPS->AddRange(selection->GetRangeAt(inx));
     }
   }
   // 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) {
     nsIPageSequenceFrame* pageSequence = aPO->mPresShell->GetPageSequenceFrame();
     NS_ENSURE_STATE(pageSequence);
     pageSequence->GetSTFPercent(aPO->mShrinkRatio);
     // 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, NS_LITERAL_STRING("text/"))) {
       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
 nsPrintEngine::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*
 nsPrintEngine::GetParentViewForRoot()
 {
   if (mIsCreatingPrintPreview) {
     nsCOMPtr<nsIContentViewer> cv = do_QueryInterface(mDocViewerPrint);
     if (cv) {
       return cv->FindContainerView();
     }
   }
   return nullptr;
 }
 nsresult
 nsPrintEngine::SetRootView(
     nsPrintObject* aPO,
     bool& doReturn,
     bool& documentIsTopLevel,
     nsSize& adjSize
 )
 {
   bool canCreateScrollbars = true;
   nsView* rootView;
   nsView* parentView = nullptr;
   doReturn = false;
   if (aPO->mParent && aPO->mParent->IsPrintable()) {
     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) {
       SetPrintPO(aPO, 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->GetType() == nsGkAtoms::subDocumentFrame) {
       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
 nsPrintEngine::ReflowPrintObject(nsPrintObject * aPO)
 {
   NS_ENSURE_STATE(aPO);
   if (!aPO->IsPrintable()) {
     return NS_OK;
   }
   NS_ASSERTION(!aPO->mPresContext, "Recreating prescontext");
   // create the PresContext
   nsPresContext::nsPresContextType type =
       mIsCreatingPrintPreview ? nsPresContext::eContext_PrintPreview:
                                 nsPresContext::eContext_Print;
   nsView* parentView =
     aPO->mParent && aPO->mParent->IsPrintable() ? nullptr : GetParentViewForRoot();
   aPO->mPresContext = parentView ?
       new nsPresContext(aPO->mDocument, type) :
       new nsRootPresContext(aPO->mDocument, type);
   NS_ENSURE_TRUE(aPO->mPresContext, NS_ERROR_OUT_OF_MEMORY);
   aPO->mPresContext->SetPrintSettings(mPrt->mPrintSettings);
   // set the presentation context to the value in the print settings
   bool printBGColors;
   mPrt->mPrintSettings->GetPrintBGColors(&printBGColors);
   aPO->mPresContext->SetBackgroundColorDraw(printBGColors);
   mPrt->mPrintSettings->GetPrintBGImages(&printBGColors);
   aPO->mPresContext->SetBackgroundImageDraw(printBGColors);
   // init it with the DC
   nsresult rv = aPO->mPresContext->Init(mPrt->mPrintDC);
   NS_ENSURE_SUCCESS(rv, rv);
   aPO->mViewManager = new nsViewManager();
   rv = aPO->mViewManager->Init(mPrt->mPrintDC);
   NS_ENSURE_SUCCESS(rv,rv);
   nsStyleSet* styleSet;
   rv = mDocViewerPrint->CreateStyleSet(aPO->mDocument, &styleSet);
   NS_ENSURE_SUCCESS(rv, rv);
   aPO->mPresShell = aPO->mDocument->CreateShell(aPO->mPresContext,
                                                 aPO->mViewManager, styleSet);
   if (!aPO->mPresShell) {
     delete styleSet;
     return NS_ERROR_FAILURE;
   }
   styleSet->EndUpdate();
   // The pres shell now owns the style set object.
   bool doReturn = false;;
   bool documentIsTopLevel = false;
   nsSize adjSize;
   rv = SetRootView(aPO, 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, aPO->mPresShell.get(),
          gFrameTypesStr[aPO->mFrameType], adjSize.width, adjSize.height));
   // This docshell stuff is weird; will go away when we stop having multiple
   // presentations per document
   aPO->mPresContext->SetContainer(aPO->mDocShell);
   aPO->mPresShell->BeginObservingDocument();
   aPO->mPresContext->SetPageSize(adjSize);
   aPO->mPresContext->SetIsRootPaginatedDocument(documentIsTopLevel);
   aPO->mPresContext->SetPageScale(aPO->mZoomRatio);
   // Calculate scale factor from printer to screen
   float printDPI = float(mPrt->mPrintDC->AppUnitsPerCSSInch()) /
                    float(mPrt->mPrintDC->AppUnitsPerDevPixel());
   aPO->mPresContext->SetPrintPreviewScale(mScreenDPI / printDPI);
   if (mIsCreatingPrintPreview && documentIsTopLevel) {
     mDocViewerPrint->SetPrintPreviewPresentation(aPO->mViewManager,
                                                  aPO->mPresContext,
                                                  aPO->mPresShell);
   }
   rv = aPO->mPresShell->Initialize(adjSize.width, adjSize.height);
   NS_ENSURE_SUCCESS(rv, rv);
   NS_ASSERTION(aPO->mPresShell, "Presshell should still be here");
   // Process the reflow event Initialize posted
   aPO->mPresShell->FlushPendingNotifications(Flush_Layout);
   rv = UpdateSelectionAndShrinkPrintObject(aPO, documentIsTopLevel);
   NS_ENSURE_SUCCESS(rv, rv);
 #ifdef EXTENDED_DEBUG_PRINTING
     if (kPrintingLogMod && kPrintingLogMod->level == 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->FrameManager()->GetRootFrame();
         fprintf(fd, "Title: %s\n", docStr.get());
         fprintf(fd, "URL:   %s\n", urlStr.get());
         fprintf(fd, "--------------- Frames ----------------\n");
         nsRefPtr<nsRenderingContext> renderingContext =
           mPrt->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 (docShell) {
           fprintf(fd, "--------------- All Views ----------------\n");
           DumpViews(docShell, 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
 nsPrintEngine::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!");
     if (po->mPresContext && po->mPresContext->IsRootPaginatedDocument()) {
       nsIPageSequenceFrame* pageSequence = po->mPresShell->GetPageSequenceFrame();
       nsIFrame * seqFrame = do_QueryFrame(pageSequence);
       if (seqFrame) {
         nsIFrame* frame = seqFrame->GetFirstPrincipalChild();
         while (frame) {
           aNumPages++;
           frame = frame->GetNextSibling();
         }
       }
     }
   }
 }
 //-----------------------------------------------------------------
 //-- Done: Reflow Methods
 //-----------------------------------------------------------------
 //-----------------------------------------------------------------
 //-- Section: Printing Methods
 //-----------------------------------------------------------------
 //-------------------------------------------------------
 // Called for each DocShell that needs to be printed
 bool
 nsPrintEngine::PrintDocContent(nsPrintObject* aPO, nsresult& aStatus)
 {
   NS_ASSERTION(aPO, "Pointer is null!");
   aStatus = NS_OK;
   if (!aPO->mHasBeenPrinted && aPO->IsPrintable()) {
     aStatus = DoPrint(aPO);
     return true;
   }
   // If |aPO->mPrintAsIs| and |aPO->mHasBeenPrinted| are true,
   // the kids frames are already processed in |PrintPage|.
   if (!aPO->mInvisible && !(aPO->mPrintAsIs && aPO->mHasBeenPrinted)) {
     for (uint32_t i=0;i<aPO->mKids.Length();i++) {
       nsPrintObject* po = aPO->mKids[i];
       bool printed = PrintDocContent(po, aStatus);
       if (printed || NS_FAILED(aStatus)) {
         return true;
       }
     }
   }
   return false;
 }
 static already_AddRefed<nsIDOMNode>
 GetEqualNodeInCloneTree(nsIDOMNode* aNode, nsIDocument* aDoc)
 {
   nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
   // Selections in anonymous subtrees aren't supported.
   if (content && content->IsInAnonymousSubtree()) {
     return nullptr;
   }
   nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
   NS_ENSURE_TRUE(node, nullptr);
   nsTArray<int32_t> indexArray;
   nsINode* current = node;
   NS_ENSURE_TRUE(current, nullptr);
   while (current) {
     nsINode* parent = current->GetParentNode();
     if (!parent) {
      break;
     }
     int32_t index = parent->IndexOf(current);
     NS_ENSURE_TRUE(index >= 0, nullptr);
     indexArray.AppendElement(index);
     current = parent;
   }
   NS_ENSURE_TRUE(current->IsNodeOfType(nsINode::eDOCUMENT), nullptr);
   current = aDoc;
   for (int32_t i = indexArray.Length() - 1; i >= 0; --i) {
     current = current->GetChildAt(indexArray[i]);
     NS_ENSURE_TRUE(current, nullptr);
   }
   nsCOMPtr<nsIDOMNode> result = do_QueryInterface(current);
   return result.forget();
 }
 static void
 CloneRangeToSelection(nsRange* aRange, nsIDocument* aDoc,
                       Selection* aSelection)
 {
   if (aRange->Collapsed()) {
     return;
   }
   nsCOMPtr<nsIDOMNode> startContainer, endContainer;
   aRange->GetStartContainer(getter_AddRefs(startContainer));
   int32_t startOffset = aRange->StartOffset();
   aRange->GetEndContainer(getter_AddRefs(endContainer));
   int32_t endOffset = aRange->EndOffset();
   NS_ENSURE_TRUE_VOID(startContainer && endContainer);
   nsCOMPtr<nsIDOMNode> newStart = GetEqualNodeInCloneTree(startContainer, aDoc);
   nsCOMPtr<nsIDOMNode> newEnd = GetEqualNodeInCloneTree(endContainer, aDoc);
   NS_ENSURE_TRUE_VOID(newStart && newEnd);
   nsCOMPtr<nsINode> newStartNode = do_QueryInterface(newStart);
   NS_ENSURE_TRUE_VOID(newStartNode);
   nsRefPtr<nsRange> range = new nsRange(newStartNode);
   nsresult rv = range->SetStart(newStartNode, startOffset);
   NS_ENSURE_SUCCESS_VOID(rv);
   rv = range->SetEnd(newEnd, endOffset);
   NS_ENSURE_SUCCESS_VOID(rv);
   aSelection->AddRange(range);
 }
 static nsresult CloneSelection(nsIDocument* aOrigDoc, nsIDocument* aDoc)
 {
   nsIPresShell* origShell = aOrigDoc->GetShell();
   nsIPresShell* shell = aDoc->GetShell();
   NS_ENSURE_STATE(origShell && shell);
   nsRefPtr<Selection> origSelection =
     origShell->GetCurrentSelection(nsISelectionController::SELECTION_NORMAL);
   nsRefPtr<Selection> selection =
     shell->GetCurrentSelection(nsISelectionController::SELECTION_NORMAL);
   NS_ENSURE_STATE(origSelection && selection);
   int32_t rangeCount = origSelection->GetRangeCount();
   for (int32_t i = 0; i < rangeCount; ++i) {
       CloneRangeToSelection(origSelection->GetRangeAt(i), aDoc, selection);
   }
   return NS_OK;
 }
 //-------------------------------------------------------
 nsresult
 nsPrintEngine::DoPrint(nsPrintObject * aPO)
 {
   PR_PL(("\n"));
   PR_PL(("**************************** %s ****************************\n", gFrameTypesStr[aPO->mFrameType]));
   PR_PL(("****** In DV::DoPrint   PO: %p \n", aPO));
   nsIPresShell*   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?");
   if (mPrt->mPrintProgressParams) {
     SetDocAndURLIntoProgress(aPO, mPrt->mPrintProgressParams);
   }
   {
     int16_t printRangeType = nsIPrintSettings::kRangeAllPages;
     nsresult rv;
     if (mPrt->mPrintSettings != nullptr) {
       mPrt->mPrintSettings->GetPrintRange(&printRangeType);
     }
     // Ask the page sequence frame to print all the pages
     nsIPageSequenceFrame* pageSequence = poPresShell->GetPageSequenceFrame();
     NS_ASSERTION(nullptr != pageSequence, "no page sequence frame");
     // We are done preparing for printing, so we can turn this off
     mPrt->mPreparingForPrint = false;
     // mPrt->mDebugFilePtr this is onlu non-null when compiled for debugging
     if (nullptr != mPrt->mDebugFilePtr) {
 #ifdef DEBUG
       // output the regression test
       nsIFrame* root = poPresShell->FrameManager()->GetRootFrame();
       root->DumpRegressionData(poPresContext, mPrt->mDebugFilePtr, 0);
       fclose(mPrt->mDebugFilePtr);
       SetIsPrinting(false);
 #endif
     } else {
 #ifdef EXTENDED_DEBUG_PRINTING
       nsIFrame* rootFrame = poPresShell->FrameManager()->GetRootFrame();
       if (aPO->IsPrintable()) {
         nsAutoCString docStr;
         nsAutoCString urlStr;
         GetDocTitleAndURL(aPO, docStr, urlStr);
         DumpLayoutData(docStr.get(), urlStr.get(), poPresContext, mPrt->mPrintDocDC, rootFrame, docShell, nullptr);
       }
 #endif
       if (!mPrt->mPrintSettings) {
         // not sure what to do here!
         SetIsPrinting(false);
         return NS_ERROR_FAILURE;
       }
       nsAutoString docTitleStr;
       nsAutoString docURLStr;
       GetDisplayTitleAndURL(aPO, docTitleStr, docURLStr, eDocTitleDefBlank);
       if (nsIPrintSettings::kRangeSelection == printRangeType) {
         CloneSelection(aPO->mDocument->GetOriginalDocument(), aPO->mDocument);
         poPresContext->SetIsRenderingOnlySelection(true);
         // temporarily creating rendering context
         // which is needed to find the selection frames
         nsRefPtr<nsRenderingContext> rc =
           mPrt->mPrintDC->CreateRenderingContext();
         // find the starting and ending page numbers
         // via the selection
         nsIFrame* startFrame;
         nsIFrame* endFrame;
         int32_t   startPageNum;
         int32_t   endPageNum;
         nsRect    startRect;
         nsRect    endRect;
         nsRefPtr<Selection> selectionPS =
           poPresShell->GetCurrentSelection(nsISelectionController::SELECTION_NORMAL);
         rv = GetPageRangeForSelection(poPresShell, poPresContext, *rc, selectionPS, pageSequence,
                                       &startFrame, startPageNum, startRect,
                                       &endFrame, endPageNum, endRect);
         if (NS_SUCCEEDED(rv)) {
           mPrt->mPrintSettings->SetStartPageRange(startPageNum);
           mPrt->mPrintSettings->SetEndPageRange(endPageNum);
           nsIntMargin marginTwips(0,0,0,0);
           nsIntMargin unwrtMarginTwips(0,0,0,0);
           mPrt->mPrintSettings->GetMarginInTwips(marginTwips);
           mPrt->mPrintSettings->GetUnwriteableMarginInTwips(unwrtMarginTwips);
           nsMargin totalMargin = poPresContext->CSSTwipsToAppUnits(marginTwips +
                                                                    unwrtMarginTwips);
           if (startPageNum == endPageNum) {
             startRect.y -= totalMargin.top;
             endRect.y   -= totalMargin.top;
             // Clip out selection regions above the top of the first page
             if (startRect.y < 0) {
               // Reduce height to be the height of the positive-territory
               // region of original rect
               startRect.height = std::max(0, startRect.YMost());
               startRect.y = 0;
             }
             if (endRect.y < 0) {
               // Reduce height to be the height of the positive-territory
               // region of original rect
               endRect.height = std::max(0, endRect.YMost());
               endRect.y = 0;
             }
             NS_ASSERTION(endRect.y >= startRect.y,
                          "Selection end point should be after start point");
             NS_ASSERTION(startRect.height >= 0,
                          "rect should have non-negative height.");
             NS_ASSERTION(endRect.height >= 0,
                          "rect should have non-negative height.");
             nscoord selectionHgt = endRect.y + endRect.height - startRect.y;
             // XXX This is temporary fix for printing more than one page of a selection
             pageSequence->SetSelectionHeight(startRect.y * aPO->mZoomRatio,
                                              selectionHgt * aPO->mZoomRatio);
             // calc total pages by getting calculating the selection's height
             // and then dividing it by how page content frames will fit.
             nscoord pageWidth, pageHeight;
             mPrt->mPrintDC->GetDeviceSurfaceDimensions(pageWidth, pageHeight);
             pageHeight -= totalMargin.top + totalMargin.bottom;
             int32_t totalPages = NSToIntCeil(float(selectionHgt) * aPO->mZoomRatio / float(pageHeight));
             pageSequence->SetTotalNumPages(totalPages);
           }
         }
       }
       nsIFrame * seqFrame = do_QueryFrame(pageSequence);
       if (!seqFrame) {
         SetIsPrinting(false);
         return NS_ERROR_FAILURE;
       }
       mPageSeqFrame = pageSequence;
       mPageSeqFrame->StartPrint(poPresContext, mPrt->mPrintSettings, docTitleStr, docURLStr);
       // Schedule Page to Print
       PR_PL(("Scheduling Print of PO: %p (%s) \n", aPO, gFrameTypesStr[aPO->mFrameType]));
       StartPagePrintTimer(aPO);
     }
   }
   return NS_OK;
 }
 //---------------------------------------------------------------------
 void
 nsPrintEngine::SetDocAndURLIntoProgress(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, docTitleStr, docURLStr, eDocTitleDefURLDoc);
   // 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.get());
   aParams->SetDocURL(docURLStr.get());
 }
 //---------------------------------------------------------------------
 void
 nsPrintEngine::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("...");
     }
   }
 }
 static bool
 DocHasPrintCallbackCanvas(nsIDocument* aDoc, void* aData)
 {
   if (!aDoc) {
     return true;
   }
   Element* root = aDoc->GetRootElement();
   if (!root) {
     return true;
   }
   nsRefPtr<nsContentList> canvases = NS_GetContentList(root,
                                                        kNameSpaceID_XHTML,
                                                        NS_LITERAL_STRING("canvas"));
   uint32_t canvasCount = canvases->Length(true);
   for (uint32_t i = 0; i < canvasCount; ++i) {
     HTMLCanvasElement* canvas = HTMLCanvasElement::FromContentOrNull(canvases->Item(i, false));
     if (canvas && canvas->GetMozPrintCallback()) {
       // This subdocument has a print callback. Set result and return false to
       // stop iteration.
       *static_cast<bool*>(aData) = true;
       return false;
     }
   }
   return true;
 }
 static bool
 DocHasPrintCallbackCanvas(nsIDocument* aDoc)
 {
   bool result = false;
   aDoc->EnumerateSubDocuments(&DocHasPrintCallbackCanvas, static_cast<void*>(&result));
   return result;
 }
 /**
  * Checks to see if the document this print engine is associated with has any
  * canvases that have a mozPrintCallback.
  */
 bool
 nsPrintEngine::HasPrintCallbackCanvas()
 {
   if (!mDocument) {
     return false;
   }
   // First check this mDocument.
   bool result = false;
   DocHasPrintCallbackCanvas(mDocument, static_cast<void*>(&result));
   // Also check the sub documents.
   return result || DocHasPrintCallbackCanvas(mDocument);
 }
 //-------------------------------------------------------
 bool
 nsPrintEngine::PrePrintPage()
 {
   NS_ASSERTION(mPageSeqFrame,  "mPageSeqFrame is null!");
   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) {
     return true; // means we are done preparing the page.
   }
   // Check setting to see if someone request it be cancelled
   bool isCancelled = false;
   mPrt->mPrintSettings->GetIsCancelled(&isCancelled);
   if (isCancelled)
     return true;
   // Ask mPageSeqFrame if the page is ready to be printed.
   // If the page doesn't get printed at all, the |done| will be |true|.
   bool done = false;
   nsresult rv = mPageSeqFrame->PrePrintNextPage(mPagePrintTimer, &done);
   if (NS_FAILED(rv)) {
     // ??? ::PrintPage doesn't set |mPrt->mIsAborted = true| if rv != NS_ERROR_ABORT,
     // but I don't really understand why this should be the right thing to do?
     // Shouldn't |mPrt->mIsAborted| set to true all the time if something
     // wents wrong?
     if (rv != NS_ERROR_ABORT) {
       ShowPrintErrorDialog(rv);
       mPrt->mIsAborted = true;
     }
     done = true;
   }
   return done;
 }
 bool
 nsPrintEngine::PrintPage(nsPrintObject*    aPO,
                          bool&           aInRange)
 {
   NS_ASSERTION(aPO,            "aPO is null!");
   NS_ASSERTION(mPageSeqFrame,  "mPageSeqFrame is null!");
   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 || !aPO || !mPageSeqFrame) {
     ShowPrintErrorDialog(NS_ERROR_FAILURE);
     return true; // means we are done printing
   }
   PR_PL(("-----------------------------------\n"));
   PR_PL(("------ In DV::PrintPage PO: %p (%s)\n", aPO, gFrameTypesStr[aPO->mFrameType]));
   // Check setting to see if someone request it be cancelled
   bool isCancelled = false;
   mPrt->mPrintSettings->GetIsCancelled(&isCancelled);
   if (isCancelled || mPrt->mIsAborted)
     return true;
   int32_t pageNum, numPages, endPage;
   mPageSeqFrame->GetCurrentPageNum(&pageNum);
   mPageSeqFrame->GetNumPages(&numPages);
   bool donePrinting;
   bool isDoingPrintRange;
   mPageSeqFrame->IsDoingPrintRange(&isDoingPrintRange);
   if (isDoingPrintRange) {
     int32_t fromPage;
     int32_t toPage;
     mPageSeqFrame->GetPrintRange(&fromPage, &toPage);
     if (fromPage > numPages) {
       return true;
     }
     if (toPage > numPages) {
       toPage = numPages;
     }
     PR_PL(("****** Printing Page %d printing from %d to page %d\n", pageNum, fromPage, toPage));
     donePrinting = pageNum >= toPage;
     aInRange = pageNum >= fromPage && pageNum <= toPage;
     endPage = (toPage - fromPage)+1;
   } else {
     PR_PL(("****** Printing Page %d of %d page(s)\n", pageNum, numPages));
     donePrinting = pageNum >= numPages;
     endPage = numPages;
     aInRange = true;
   }
   // XXX This is wrong, but the actual behavior in the presence of a print
   // range sucks.
   if (mPrt->mPrintFrameType == nsIPrintSettings::kEachFrameSep)
     endPage = mPrt->mNumPrintablePages;
   mPrt->DoOnProgressChange(++mPrt->mNumPagesPrinted, endPage, false, 0);
   // Print the Page
   // 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 = mPageSeqFrame->PrintNextPage();
   if (NS_FAILED(rv)) {
     if (rv != NS_ERROR_ABORT) {
       ShowPrintErrorDialog(rv);
       mPrt->mIsAborted = true;
     }
     return true;
   }
   mPageSeqFrame->DoPageEnd();
   return donePrinting;
 }
 /** ---------------------------------------------------
  *  Find by checking frames type
  */
 nsresult
 nsPrintEngine::FindSelectionBoundsWithList(nsPresContext* aPresContext,
                                            nsRenderingContext& aRC,
                                            nsFrameList::Enumerator& aChildFrames,
                                            nsIFrame *      aParentFrame,
                                            nsRect&         aRect,
                                            nsIFrame *&     aStartFrame,
                                            nsRect&         aStartRect,
                                            nsIFrame *&     aEndFrame,
                                            nsRect&         aEndRect)
 {
   NS_ASSERTION(aPresContext, "Pointer is null!");
   NS_ASSERTION(aParentFrame, "Pointer is null!");
   aRect += aParentFrame->GetPosition();
   for (; !aChildFrames.AtEnd(); aChildFrames.Next()) {
     nsIFrame* child = aChildFrames.get();
     if (child->IsSelected() && child->IsVisibleForPainting()) {
       nsRect r = child->GetRect();
       if (aStartFrame == nullptr) {
         aStartFrame = child;
         aStartRect.SetRect(aRect.x + r.x, aRect.y + r.y, r.width, r.height);
       } else {
         aEndFrame = child;
         aEndRect.SetRect(aRect.x + r.x, aRect.y + r.y, r.width, r.height);
       }
     }
     FindSelectionBounds(aPresContext, aRC, child, aRect, aStartFrame, aStartRect, aEndFrame, aEndRect);
     child = child->GetNextSibling();
   }
   aRect -= aParentFrame->GetPosition();
   return NS_OK;
 }
 //-------------------------------------------------------
 // Find the Frame that is XMost
 nsresult
 nsPrintEngine::FindSelectionBounds(nsPresContext* aPresContext,
                                    nsRenderingContext& aRC,
                                    nsIFrame *      aParentFrame,
                                    nsRect&         aRect,
                                    nsIFrame *&     aStartFrame,
                                    nsRect&         aStartRect,
                                    nsIFrame *&     aEndFrame,
                                    nsRect&         aEndRect)
 {
   NS_ASSERTION(aPresContext, "Pointer is null!");
   NS_ASSERTION(aParentFrame, "Pointer is null!");
   // loop through named child lists
   nsIFrame::ChildListIterator lists(aParentFrame);
   for (; !lists.IsDone(); lists.Next()) {
     nsFrameList::Enumerator childFrames(lists.CurrentList());
     nsresult rv = FindSelectionBoundsWithList(aPresContext, aRC, childFrames, aParentFrame, aRect, aStartFrame, aStartRect, aEndFrame, aEndRect);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   return NS_OK;
 }
 /** ---------------------------------------------------
  *  This method finds the starting and ending page numbers
  *  of the selection and also returns rect for each where
  *  the x,y of the rect is relative to the very top of the
  *  frame tree (absolutely positioned)
  */
 nsresult
 nsPrintEngine::GetPageRangeForSelection(nsIPresShell *        aPresShell,
                                         nsPresContext*       aPresContext,
                                         nsRenderingContext&  aRC,
                                         nsISelection*         aSelection,
                                         nsIPageSequenceFrame* aPageSeqFrame,
                                         nsIFrame**            aStartFrame,
                                         int32_t&              aStartPageNum,
                                         nsRect&               aStartRect,
                                         nsIFrame**            aEndFrame,
                                         int32_t&              aEndPageNum,
                                         nsRect&               aEndRect)
 {
   NS_ASSERTION(aPresShell, "Pointer is null!");
   NS_ASSERTION(aPresContext, "Pointer is null!");
   NS_ASSERTION(aSelection, "Pointer is null!");
   NS_ASSERTION(aPageSeqFrame, "Pointer is null!");
   NS_ASSERTION(aStartFrame, "Pointer is null!");
   NS_ASSERTION(aEndFrame, "Pointer is null!");
   nsIFrame * seqFrame = do_QueryFrame(aPageSeqFrame);
   if (!seqFrame) {
     return NS_ERROR_FAILURE;
   }
   nsIFrame * startFrame = nullptr;
   nsIFrame * endFrame   = nullptr;
   // start out with the sequence frame and search the entire frame tree
   // capturing the starting and ending child frames of the selection
   // and their rects
   nsRect r = seqFrame->GetRect();
   FindSelectionBounds(aPresContext, aRC, seqFrame, r,
                       startFrame, aStartRect, endFrame, aEndRect);
 #ifdef DEBUG_rodsX
   printf("Start Frame: %p\n", startFrame);
   printf("End Frame:   %p\n", endFrame);
 #endif
   // initial the page numbers here
   // in case we don't find and frames
   aStartPageNum = -1;
   aEndPageNum   = -1;
   nsIFrame * startPageFrame;
   nsIFrame * endPageFrame;
   // check to make sure we found a starting frame
   if (startFrame != nullptr) {
     // Now search up the tree to find what page the
     // start/ending selections frames are on
     //
     // Check to see if start should be same as end if
     // the end frame comes back null
     if (endFrame == nullptr) {
       // XXX the "GetPageFrame" step could be integrated into
       // the FindSelectionBounds step, but walking up to find
       // the parent of a child frame isn't expensive and it makes
       // FindSelectionBounds a little easier to understand
       startPageFrame = nsLayoutUtils::GetPageFrame(startFrame);
       endPageFrame   = startPageFrame;
       aEndRect       = aStartRect;
     } else {
       startPageFrame = nsLayoutUtils::GetPageFrame(startFrame);
       endPageFrame   = nsLayoutUtils::GetPageFrame(endFrame);
     }
   } else {
     return NS_ERROR_FAILURE;
   }
 #ifdef DEBUG_rodsX
   printf("Start Page: %p\n", startPageFrame);
   printf("End Page:   %p\n", endPageFrame);
   // dump all the pages and their pointers
   {
   int32_t pageNum = 1;
   nsIFrame* child = seqFrame->GetFirstPrincipalChild();
   while (child != nullptr) {
     printf("Page: %d - %p\n", pageNum, child);
     pageNum++;
     child = child->GetNextSibling();
   }
   }
 #endif
   // Now that we have the page frames
   // find out what the page numbers are for each frame
   int32_t pageNum = 1;
   nsIFrame* page = seqFrame->GetFirstPrincipalChild();
   while (page != nullptr) {
     if (page == startPageFrame) {
       aStartPageNum = pageNum;
     }
     if (page == endPageFrame) {
       aEndPageNum = pageNum;
     }
     pageNum++;
     page = page->GetNextSibling();
   }
 #ifdef DEBUG_rodsX
   printf("Start Page No: %d\n", aStartPageNum);
   printf("End Page No:   %d\n", aEndPageNum);
 #endif
   *aStartFrame = startPageFrame;
   *aEndFrame   = endPageFrame;
   return NS_OK;
 }
 //-----------------------------------------------------------------
 //-- Done: Printing Methods
 //-----------------------------------------------------------------
 //-----------------------------------------------------------------
 //-- Section: Misc Support Methods
 //-----------------------------------------------------------------
 //---------------------------------------------------------------------
 void nsPrintEngine::SetIsPrinting(bool aIsPrinting)
 {
   mIsDoingPrinting = aIsPrinting;
   // Calling SetIsPrinting while in print preview confuses the document viewer
   // This is safe because we prevent exiting print preview while printing
   if (!mIsDoingPrintPreview && mDocViewerPrint) {
     mDocViewerPrint->SetIsPrinting(aIsPrinting);
   }
   if (mPrt && aIsPrinting) {
     mPrt->mPreparingForPrint = true;
   }
 }
 //---------------------------------------------------------------------
 void nsPrintEngine::SetIsPrintPreview(bool aIsPrintPreview)
 {
   mIsDoingPrintPreview = aIsPrintPreview;
   if (mDocViewerPrint) {
     mDocViewerPrint->SetIsPrintPreview(aIsPrintPreview);
   }
 }
 //---------------------------------------------------------------------
 void
 nsPrintEngine::CleanupDocTitleArray(char16_t**& aArray, int32_t& aCount)
 {
   for (int32_t i = aCount - 1; i >= 0; i--) {
     nsMemory::Free(aArray[i]);
   }
   nsMemory::Free(aArray);
   aArray = nullptr;
   aCount = 0;
 }
 //---------------------------------------------------------------------
 // static
 bool nsPrintEngine::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->IsHTML(nsGkAtoms::frameset)) {
       return true;
     }
   }
   return false;
 }
 /** ---------------------------------------------------
  *  Get the Focused Frame for a documentviewer
  */
 already_AddRefed<nsIDOMWindow>
 nsPrintEngine::FindFocusedDOMWindow()
 {
   nsIFocusManager* fm = nsFocusManager::GetFocusManager();
   NS_ENSURE_TRUE(fm, nullptr);
   nsCOMPtr<nsPIDOMWindow> window(mDocument->GetWindow());
   NS_ENSURE_TRUE(window, nullptr);
   nsCOMPtr<nsPIDOMWindow> rootWindow = window->GetPrivateRoot();
   NS_ENSURE_TRUE(rootWindow, nullptr);
   nsCOMPtr<nsPIDOMWindow> focusedWindow;
   nsFocusManager::GetFocusedDescendant(rootWindow, true,
                                        getter_AddRefs(focusedWindow));
   NS_ENSURE_TRUE(focusedWindow, nullptr);
   if (IsWindowsInOurSubTree(focusedWindow)) {
     return focusedWindow.forget();
   }
   return nullptr;
 }
 //---------------------------------------------------------------------
 bool
 nsPrintEngine::IsWindowsInOurSubTree(nsPIDOMWindow * window)
 {
   bool found = false;
   // now check to make sure it is in "our" tree of docshells
   if (window) {
     nsCOMPtr<nsIDocShell> docShell = window->GetDocShell();
     if (docShell) {
       // get this DocViewer docshell
       nsCOMPtr<nsIDocShell> thisDVDocShell(do_QueryReferent(mContainer));
       while (!found) {
         if (docShell) {
           if (docShell == thisDVDocShell) {
             found = true;
             break;
           }
         } else {
           break; // at top of tree
         }
         nsCOMPtr<nsIDocShellTreeItem> docShellItemParent;
         docShell->GetSameTypeParent(getter_AddRefs(docShellItemParent));
         docShell = do_QueryInterface(docShellItemParent);
       } // while
     }
   } // scriptobj
   return found;
 }
 //-------------------------------------------------------
 bool
 nsPrintEngine::DonePrintingPages(nsPrintObject* aPO, nsresult aResult)
 {
   //NS_ASSERTION(aPO, "Pointer is null!");
   PR_PL(("****** In DV::DonePrintingPages 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) {
     mPageSeqFrame->ResetPrintCanvasList();
   }
   if (aPO && !mPrt->mIsAborted) {
     aPO->mHasBeenPrinted = true;
     nsresult rv;
     bool didPrint = PrintDocContent(mPrt->mPrintObject, rv);
     if (NS_SUCCEEDED(rv) && didPrint) {
       PR_PL(("****** In DV::DonePrintingPages PO: %p (%s) didPrint:%s (Not Done Printing)\n", aPO, gFrameTypesStr[aPO->mFrameType], PRT_YESNO(didPrint)));
       return false;
     }
   }
   if (NS_SUCCEEDED(aResult)) {
     FirePrintCompletionEvent();
   }
   TurnScriptingOn(true);
   SetIsPrinting(false);
   // Release reference to mPagePrintTimer; the timer object destroys itself
   // after this returns true
   NS_IF_RELEASE(mPagePrintTimer);
   return true;
 }
 //-------------------------------------------------------
 // Recursively sets the PO items to be printed "As Is"
 // from the given item down into the tree
 void
 nsPrintEngine::SetPrintAsIs(nsPrintObject* aPO, bool aAsIs)
 {
   NS_ASSERTION(aPO, "Pointer is null!");
   aPO->mPrintAsIs = aAsIs;
   for (uint32_t i=0;i<aPO->mKids.Length();i++) {
     SetPrintAsIs(aPO->mKids[i], aAsIs);
   }
 }
 //-------------------------------------------------------
 // Given a DOMWindow it recursively finds the PO object that matches
 nsPrintObject*
 nsPrintEngine::FindPrintObjectByDOMWin(nsPrintObject* aPO,
                                        nsIDOMWindow* aDOMWin)
 {
   NS_ASSERTION(aPO, "Pointer is null!");
   // Often the CurFocused DOMWindow is passed in
   // andit is valid for it to be null, so short circut
   if (!aDOMWin) {
     return nullptr;
   }
   nsCOMPtr<nsIDOMDocument> domDoc;
   aDOMWin->GetDocument(getter_AddRefs(domDoc));
   nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
   if (aPO->mDocument && aPO->mDocument->GetOriginalDocument() == doc) {
     return aPO;
   }
   int32_t cnt = aPO->mKids.Length();
   for (int32_t i = 0; i < cnt; ++i) {
     nsPrintObject* po = FindPrintObjectByDOMWin(aPO->mKids[i], aDOMWin);
     if (po) {
       return po;
     }
   }
   return nullptr;
 }
 //-------------------------------------------------------
 nsresult
 nsPrintEngine::EnablePOsForPrinting()
 {
   // NOTE: All POs have been "turned off" for printing
   // this is where we decided which POs get printed.
   mPrt->mSelectedPO = nullptr;
   if (mPrt->mPrintSettings == nullptr) {
     return NS_ERROR_FAILURE;
   }
   mPrt->mPrintFrameType = nsIPrintSettings::kNoFrames;
   mPrt->mPrintSettings->GetPrintFrameType(&mPrt->mPrintFrameType);
   int16_t printHowEnable = nsIPrintSettings::kFrameEnableNone;
   mPrt->mPrintSettings->GetHowToEnableFrameUI(&printHowEnable);
   int16_t printRangeType = nsIPrintSettings::kRangeAllPages;
   mPrt->mPrintSettings->GetPrintRange(&printRangeType);
   PR_PL(("\n"));
   PR_PL(("********* nsPrintEngine::EnablePOsForPrinting *********\n"));
   PR_PL(("PrintFrameType:     %s \n", gPrintFrameTypeStr[mPrt->mPrintFrameType]));
   PR_PL(("HowToEnableFrameUI: %s \n", gFrameHowToEnableStr[printHowEnable]));
   PR_PL(("PrintRange:         %s \n", gPrintRangeStr[printRangeType]));
   PR_PL(("----\n"));
   // ***** This is the ultimate override *****
   // if we are printing the selection (either an IFrame or selection range)
   // then set the mPrintFrameType as if it were the selected frame
   if (printRangeType == nsIPrintSettings::kRangeSelection) {
     mPrt->mPrintFrameType = nsIPrintSettings::kSelectedFrame;
     printHowEnable        = nsIPrintSettings::kFrameEnableNone;
   }
   // This tells us that the "Frame" UI has turned off,
   // so therefore there are no FrameSets/Frames/IFrames to be printed
   //
   // This means there are not FrameSets,
   // but the document could contain an IFrame
   if (printHowEnable == nsIPrintSettings::kFrameEnableNone) {
     // Print all the pages or a sub range of pages
     if (printRangeType == nsIPrintSettings::kRangeAllPages ||
         printRangeType == nsIPrintSettings::kRangeSpecifiedPageRange) {
       SetPrintPO(mPrt->mPrintObject, true);
       // Set the children so they are PrinAsIs
       // In this case, the children are probably IFrames
       if (mPrt->mPrintObject->mKids.Length() > 0) {
         for (uint32_t i=0;i<mPrt->mPrintObject->mKids.Length();i++) {
           nsPrintObject* po = mPrt->mPrintObject->mKids[i];
           NS_ASSERTION(po, "nsPrintObject can't be null!");
           SetPrintAsIs(po);
         }
         // ***** Another override *****
         mPrt->mPrintFrameType = nsIPrintSettings::kFramesAsIs;
       }
       PR_PL(("PrintFrameType:     %s \n", gPrintFrameTypeStr[mPrt->mPrintFrameType]));
       PR_PL(("HowToEnableFrameUI: %s \n", gFrameHowToEnableStr[printHowEnable]));
       PR_PL(("PrintRange:         %s \n", gPrintRangeStr[printRangeType]));
       return NS_OK;
     }
     // This means we are either printed a selected IFrame or
     // we are printing the current selection
     if (printRangeType == nsIPrintSettings::kRangeSelection) {
       // If the currentFocusDOMWin can'r be null if something is selected
       if (mPrt->mCurrentFocusWin) {
         // Find the selected IFrame
         nsPrintObject * po = FindPrintObjectByDOMWin(mPrt->mPrintObject, mPrt->mCurrentFocusWin);
         if (po != nullptr) {
           mPrt->mSelectedPO = po;
           // Makes sure all of its children are be printed "AsIs"
           SetPrintAsIs(po);
           // Now, only enable this POs (the selected PO) and all of its children
           SetPrintPO(po, true);
           // check to see if we have a range selection,
           // as oppose to a insert selection
           // this means if the user just clicked on the IFrame then
           // there will not be a selection so we want the entire page to print
           //
           // XXX this is sort of a hack right here to make the page
           // not try to reposition itself when printing selection
           nsCOMPtr<nsIDOMWindow> domWin =
             do_QueryInterface(po->mDocument->GetOriginalDocument()->GetWindow());
           if (!IsThereARangeSelection(domWin)) {
             printRangeType = nsIPrintSettings::kRangeAllPages;
             mPrt->mPrintSettings->SetPrintRange(printRangeType);
           }
           PR_PL(("PrintFrameType:     %s \n", gPrintFrameTypeStr[mPrt->mPrintFrameType]));
           PR_PL(("HowToEnableFrameUI: %s \n", gFrameHowToEnableStr[printHowEnable]));
           PR_PL(("PrintRange:         %s \n", gPrintRangeStr[printRangeType]));
           return NS_OK;
         }
       } else {
         for (uint32_t i=0;i<mPrt->mPrintDocList.Length();i++) {
           nsPrintObject* po = mPrt->mPrintDocList.ElementAt(i);
           NS_ASSERTION(po, "nsPrintObject can't be null!");
           nsCOMPtr<nsIDOMWindow> domWin = do_GetInterface(po->mDocShell);
           if (IsThereARangeSelection(domWin)) {
             mPrt->mCurrentFocusWin = domWin;
             SetPrintPO(po, true);
             break;
           }
         }
         return NS_OK;
       }
     }
   }
   // check to see if there is a selection when a FrameSet is present
   if (printRangeType == nsIPrintSettings::kRangeSelection) {
     // If the currentFocusDOMWin can'r be null if something is selected
     if (mPrt->mCurrentFocusWin) {
       // Find the selected IFrame
       nsPrintObject * po = FindPrintObjectByDOMWin(mPrt->mPrintObject, mPrt->mCurrentFocusWin);
       if (po != nullptr) {
         mPrt->mSelectedPO = po;
         // Makes sure all of its children are be printed "AsIs"
         SetPrintAsIs(po);
         // Now, only enable this POs (the selected PO) and all of its children
         SetPrintPO(po, true);
         // check to see if we have a range selection,
         // as oppose to a insert selection
         // this means if the user just clicked on the IFrame then
         // there will not be a selection so we want the entire page to print
         //
         // XXX this is sort of a hack right here to make the page
         // not try to reposition itself when printing selection
         nsCOMPtr<nsIDOMWindow> domWin =
           do_QueryInterface(po->mDocument->GetOriginalDocument()->GetWindow());
         if (!IsThereARangeSelection(domWin)) {
           printRangeType = nsIPrintSettings::kRangeAllPages;
           mPrt->mPrintSettings->SetPrintRange(printRangeType);
         }
         PR_PL(("PrintFrameType:     %s \n", gPrintFrameTypeStr[mPrt->mPrintFrameType]));
         PR_PL(("HowToEnableFrameUI: %s \n", gFrameHowToEnableStr[printHowEnable]));
         PR_PL(("PrintRange:         %s \n", gPrintRangeStr[printRangeType]));
         return NS_OK;
       }
     }
   }
   // If we are printing "AsIs" then sets all the POs to be printed as is
   if (mPrt->mPrintFrameType == nsIPrintSettings::kFramesAsIs) {
     SetPrintAsIs(mPrt->mPrintObject);
     SetPrintPO(mPrt->mPrintObject, true);
     return NS_OK;
   }
   // If we are printing the selected Frame then
   // find that PO for that selected DOMWin and set it all of its
   // children to be printed
   if (mPrt->mPrintFrameType == nsIPrintSettings::kSelectedFrame) {
     if ((mPrt->mIsParentAFrameSet && mPrt->mCurrentFocusWin) || mPrt->mIsIFrameSelected) {
       nsPrintObject * po = FindPrintObjectByDOMWin(mPrt->mPrintObject, mPrt->mCurrentFocusWin);
       if (po != nullptr) {
         mPrt->mSelectedPO = po;
         // NOTE: Calling this sets the "po" and
         // we don't want to do this for documents that have no children,
         // because then the "DoEndPage" gets called and it shouldn't
         if (po->mKids.Length() > 0) {
           // Makes sure that itself, and all of its children are printed "AsIs"
           SetPrintAsIs(po);
         }
         // Now, only enable this POs (the selected PO) and all of its children
         SetPrintPO(po, true);
       }
     }
     return NS_OK;
   }
   // If we are print each subdoc separately,
   // then don't print any of the FraneSet Docs
   if (mPrt->mPrintFrameType == nsIPrintSettings::kEachFrameSep) {
     SetPrintPO(mPrt->mPrintObject, true);
     int32_t cnt = mPrt->mPrintDocList.Length();
     for (int32_t i=0;i<cnt;i++) {
       nsPrintObject* po = mPrt->mPrintDocList.ElementAt(i);
       NS_ASSERTION(po, "nsPrintObject can't be null!");
       if (po->mFrameType == eFrameSet) {
         po->mDontPrint = true;
       }
     }
   }
   return NS_OK;
 }
 //-------------------------------------------------------
 // Return the nsPrintObject with that is XMost (The widest frameset frame) AND
 // contains the XMost (widest) layout frame
 nsPrintObject*
 nsPrintEngine::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;
 }
 //-------------------------------------------------------
 void
 nsPrintEngine::TurnScriptingOn(bool aDoTurnOn)
 {
   if (mIsDoingPrinting && aDoTurnOn && mDocViewerPrint &&
       mDocViewerPrint->GetIsPrintPreview()) {
     // We don't want to turn scripting on if print preview is shown still after
     // printing.
     return;
   }
   nsPrintData* prt = mPrt;
 #ifdef NS_PRINT_PREVIEW
   if (!prt) {
     prt = mPrtPreview;
   }
 #endif
   if (!prt) {
     return;
   }
   NS_ASSERTION(mDocument, "We MUST have a document.");
   // First, get the script global object from the document...
   for (uint32_t i=0;i<prt->mPrintDocList.Length();i++) {
     nsPrintObject* po = prt->mPrintDocList.ElementAt(i);
     NS_ASSERTION(po, "nsPrintObject can't be null!");
     nsIDocument* doc = po->mDocument;
     if (!doc) {
       continue;
     }
     if (nsCOMPtr<nsPIDOMWindow> window = doc->GetInnerWindow()) {
       nsCOMPtr<nsIGlobalObject> go = do_QueryInterface(window);
       NS_WARN_IF_FALSE(go && go->GetGlobalJSObject(), "Can't get global");
       nsresult propThere = NS_PROPTABLE_PROP_NOT_THERE;
       doc->GetProperty(nsGkAtoms::scriptEnabledBeforePrintOrPreview,
                        &propThere);
       if (aDoTurnOn) {
         if (propThere != NS_PROPTABLE_PROP_NOT_THERE) {
           doc->DeleteProperty(nsGkAtoms::scriptEnabledBeforePrintOrPreview);
           if (go && go->GetGlobalJSObject()) {
             xpc::Scriptability::Get(go->GetGlobalJSObject()).Unblock();
           }
           window->ResumeTimeouts(false);
         }
       } else {
         // Have to be careful, because people call us over and over again with
         // aDoTurnOn == false.  So don't set the property if it's already
         // set, since in that case we'd set it to the wrong value.
         if (propThere == NS_PROPTABLE_PROP_NOT_THERE) {
           // Stash the current value of IsScriptEnabled on the document, so
           // that layout code running in print preview doesn't get confused.
           doc->SetProperty(nsGkAtoms::scriptEnabledBeforePrintOrPreview,
                            NS_INT32_TO_PTR(doc->IsScriptEnabled()));
           if (go && go->GetGlobalJSObject()) {
             xpc::Scriptability::Get(go->GetGlobalJSObject()).Block();
           }
           window->SuspendTimeouts(1, false);
         }
       }
     }
   }
 }
 //-----------------------------------------------------------------
 //-- Done: Misc Support Methods
 //-----------------------------------------------------------------
 //-----------------------------------------------------------------
 //-- Section: Finishing up or Cleaning up
 //-----------------------------------------------------------------
 //-----------------------------------------------------------------
 void
 nsPrintEngine::CloseProgressDialog(nsIWebProgressListener* aWebProgressListener)
 {
   if (aWebProgressListener) {
     aWebProgressListener->OnStateChange(nullptr, nullptr, nsIWebProgressListener::STATE_STOP|nsIWebProgressListener::STATE_IS_DOCUMENT, NS_OK);
   }
 }
 //-----------------------------------------------------------------
 nsresult
 nsPrintEngine::FinishPrintPreview()
 {
   nsresult rv = NS_OK;
 #ifdef NS_PRINT_PREVIEW
   if (!mPrt) {
     /* we're already finished with print preview */
     return rv;
   }
   rv = DocumentReadyForPrinting();
   SetIsCreatingPrintPreview(false);
   /* cleaup on failure + notify user */
   if (NS_FAILED(rv)) {
     /* cleanup done, let's fire-up an error dialog to notify the user
      * what went wrong...
      */
     mPrt->OnEndPrinting();
     TurnScriptingOn(true);
     return rv;
   }
   // At this point we are done preparing everything
   // before it is to be created
   if (mIsDoingPrintPreview && mOldPrtPreview) {
     delete mOldPrtPreview;
     mOldPrtPreview = nullptr;
   }
   mPrt->OnEndPrinting();
   // PrintPreview was built using the mPrt (code reuse)
   // then we assign it over
   mPrtPreview = mPrt;
   mPrt        = nullptr;
 #endif // NS_PRINT_PREVIEW
   return NS_OK;
 }
 //-----------------------------------------------------------------
 //-- Done: Finishing up or Cleaning up
 //-----------------------------------------------------------------
 /*=============== Timer Related Code ======================*/
 nsresult
 nsPrintEngine::StartPagePrintTimer(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);
     nsRefPtr<nsPagePrintTimer> timer =
       new nsPagePrintTimer(this, mDocViewerPrint, printPageDelay);
     timer.forget(&mPagePrintTimer);
   }
   return mPagePrintTimer->Start(aPO);
 }
 /*=============== nsIObserver Interface ======================*/
 NS_IMETHODIMP
 nsPrintEngine::Observe(nsISupports *aSubject, const char *aTopic, const char16_t *aData)
 {
   nsresult rv = NS_ERROR_FAILURE;
   rv = InitPrintDocConstruction(true);
   if (!mIsDoingPrinting && mPrtPreview) {
       mPrtPreview->OnEndPrinting();
   }
   return rv;
 }
 //---------------------------------------------------------------
 //-- PLEvent Notification
 //---------------------------------------------------------------
 class nsPrintCompletionEvent : public nsRunnable {
 public:
   nsPrintCompletionEvent(nsIDocumentViewerPrint *docViewerPrint)
     : mDocViewerPrint(docViewerPrint) {
     NS_ASSERTION(mDocViewerPrint, "mDocViewerPrint is null.");
   }
   NS_IMETHOD Run() MOZ_OVERRIDE {
     if (mDocViewerPrint)
       mDocViewerPrint->OnDonePrinting();
     return NS_OK;
   }
 private:
   nsCOMPtr<nsIDocumentViewerPrint> mDocViewerPrint;
 };
 //-----------------------------------------------------------
 void
 nsPrintEngine::FirePrintCompletionEvent()
 {
   nsCOMPtr<nsIRunnable> event = new nsPrintCompletionEvent(mDocViewerPrint);
   if (NS_FAILED(NS_DispatchToCurrentThread(event)))
     NS_WARNING("failed to dispatch print completion event");
 }
 //---------------------------------------------------------------
 //---------------------------------------------------------------
 //-- 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, int32_t aIndent)
 {
   if (!aPresContext || !out)
     return;
   nsIPresShell *shell = aPresContext->GetPresShell();
   if (shell) {
     nsIFrame* frame = shell->FrameManager()->GetRootFrame();
     if (frame) {
       frame->List(aPresContext, out, aIndent);
     }
   }
 }
 /** ---------------------------------------------------
  *  Dumps Frames for Printing
  */
 static void DumpFrames(FILE*                 out,
                        nsPresContext*       aPresContext,
                        nsRenderingContext * 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->GetFirstPrincipalChild();
   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 (NS_SUCCEEDED(child->IsVisibleForPainting(aPresContext, *aRendContext, true, &isSelected))) {
       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);
     nsIPresShell* shell = nsPrintEngine::GetPresShellFor(aDocShell);
     if (shell) {
       nsViewManager* vm = shell->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;
     aDocShell->GetChildCount(&n);
     for (i = 0; i < n; i++) {
       nsCOMPtr<nsIDocShellTreeItem> child;
       aDocShell->GetChildAt(i, getter_AddRefs(child));
       nsCOMPtr<nsIDocShell> childAsShell(do_QueryInterface(child));
       if (childAsShell) {
         DumpViews(childAsShell, out);
       }
     }
   }
 }
 /** ---------------------------------------------------
  *  Dumps the Views and Frames
  */
 void DumpLayoutData(char*              aTitleStr,
                     char*              aURLStr,
                     nsPresContext*    aPresContext,
                     nsDeviceContext * aDC,
                     nsIFrame *         aRootFrame,
                     nsIDocShekk *      aDocShell,
                     FILE*              aFD = nullptr)
 {
   if (!kPrintingLogMod || kPrintingLogMod->level != 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");
     nsRefPtr<nsRenderingContext> renderingContext =
       aDC->CreateRenderingContext();
     RootFrameList(aPresContext, fd, 0);
     //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(nsTArray<nsPrintObject*> * aDocList)
 {
   if (!kPrintingLogMod || kPrintingLogMod->level != DUMP_LAYOUT_LEVEL) return;
   NS_ASSERTION(aDocList, "Pointer is null!");
   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"));
   int32_t cnt = aDocList->Length();
   for (int32_t i=0;i<cnt;i++) {
     nsPrintObject* po = aDocList->ElementAt(i);
     NS_ASSERTION(po, "nsPrintObject can't be null!");
     nsIFrame* rootFrame = nullptr;
     if (po->mPresShell) {
       rootFrame = po->mPresShell->FrameManager()->GetRootFrame();
       while (rootFrame != nullptr) {
         nsIPageSequenceFrame * sqf = do_QueryFrame(rootFrame);
         if (sqf) {
           break;
         }
         rootFrame = rootFrame->GetFirstPrincipalChild();
       }
     }
     PR_PL(("%s %d %d %d %p %p %p %p %p   %d   %d,%d,%d,%d\n", types[po->mFrameType],
             po->IsPrintable(), po->mPrintAsIs, po->mHasBeenPrinted, po, po->mDocShell.get(), po->mSeqFrame,
             po->mPageFrame, rootFrame, po->mPageNum, po->mRect.x, po->mRect.y, po->mRect.width, po->mRect.height));
   }
 }
 //-------------------------------------------------------------
 static void DumpPrintObjectsTree(nsPrintObject * aPO, int aLevel, FILE* aFD)
 {
   if (!kPrintingLogMod || kPrintingLogMod->level != 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");
   }
   int32_t cnt = aPO->mKids.Length();
   for (int32_t i=0;i<cnt;i++) {
     nsPrintObject* po = aPO->mKids.ElementAt(i);
     NS_ASSERTION(po, "nsPrintObject can't be null!");
     for (int32_t k=0;k<aLevel;k++) fprintf(fd, "  ");
     fprintf(fd, "%s %p %p %p %p %d %d,%d,%d,%d\n", types[po->mFrameType], po, po->mDocShell.get(), po->mSeqFrame,
            po->mPageFrame, po->mPageNum, po->mRect.x, po->mRect.y, po->mRect.width, po->mRect.height);
   }
 }
 //-------------------------------------------------------------
 static void GetDocTitleAndURL(nsPrintObject* aPO, nsACString& aDocStr, nsACString& aURLStr)
 {
   nsAutoString docTitleStr;
   nsAutoString docURLStr;
   nsPrintEngine::GetDisplayTitleAndURL(aPO,
                                        docTitleStr, docURLStr,
                                        nsPrintEngine::eDocTitleDefURLDoc);
   aDocStr = NS_ConvertUTF16toUTF8(docTitleStr);
   aURLStr = NS_ConvertUTF16toUTF8(docURLStr);
 }
 //-------------------------------------------------------------
 static void DumpPrintObjectsTreeLayout(nsPrintObject * aPO,
                                        nsDeviceContext * aDC,
                                        int aLevel, FILE * aFD)
 {
   if (!kPrintingLogMod || kPrintingLogMod->level != 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->FrameManager()->GetRootFrame();
     }
     for (int32_t k=0;k<aLevel;k++) fprintf(fd, "  ");
     fprintf(fd, "%s %p %p %p %p %d %d,%d,%d,%d\n", types[aPO->mFrameType], aPO, aPO->mDocShell.get(), aPO->mSeqFrame,
            aPO->mPageFrame, aPO->mPageNum, aPO->mRect.x, aPO->mRect.y, aPO->mRect.width, aPO->mRect.height);
     if (aPO->IsPrintable()) {
       nsAutoCString docStr;
       nsAutoCString urlStr;
       GetDocTitleAndURL(aPO, docStr, urlStr);
       DumpLayoutData(docStr.get(), urlStr.get(), aPO->mPresContext, aDC, rootFrame, aPO->mDocShell, fd);
     }
     fprintf(fd, "<***************************************************>\n");
     int32_t cnt = aPO->mKids.Length();
     for (int32_t i=0;i<cnt;i++) {
       nsPrintObject* po = aPO->mKids.ElementAt(i);
       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, nsTArray<nsPrintObject*> * aDocList)
 {
   if (!kPrintingLogMod || kPrintingLogMod->level != DUMP_LAYOUT_LEVEL) return;
   NS_ASSERTION(aStr, "Pointer is null!");
   NS_ASSERTION(aDocList, "Pointer is null!");
   PR_PL(("%s\n", aStr));
   DumpPrintObjectsList(aDocList);
 }
 #define DUMP_DOC_LIST(_title) DumpPrintObjectsListStart((_title), mPrt->mPrintDocList);
 #define DUMP_DOC_TREE DumpPrintObjectsTree(mPrt->mPrintObject);
 #define DUMP_DOC_TREELAYOUT DumpPrintObjectsTreeLayout(mPrt->mPrintObject, mPrt->mPrintDC);
 #else
 #define DUMP_DOC_LIST(_title)
 #define DUMP_DOC_TREE
 #define DUMP_DOC_TREELAYOUT
 #endif
 //---------------------------------------------------------------
 //---------------------------------------------------------------
 //-- End of debug helper routines
 //---------------------------------------------------------------

The Tor Browser / annotate

layout/printing/nsPrintEngine.cpp@97036ab72558 (annotated)

layout/printing/nsPrintEngine.cpp