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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsPrintJob.h"
#include "nsDebug.h"
#include "nsDocShell.h"
#include "nsReadableUtils.h"
#include "nsQueryObject.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/ResultExtensions.h"
#include "mozilla/ComputedStyleInlines.h"
#include "mozilla/dom/BrowsingContext.h"
#include "mozilla/dom/PBrowser.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/dom/ShadowRoot.h"
#include "mozilla/dom/CustomEvent.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/HTMLCanvasElement.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/IntegerRange.h"
#include "mozilla/PresShell.h"
#include "mozilla/PresShellInlines.h"
#include "mozilla/StaticPrefs_print.h"
#include "mozilla/Telemetry.h"
#include "mozilla/Try.h"
#include "nsIBrowserChild.h"
#include "nsIOService.h"
#include "nsIScriptGlobalObject.h"
#include "nsIStringBundle.h"
#include "nsPIDOMWindow.h"
#include "nsPrintData.h"
#include "nsPrintObject.h"
#include "nsIDocShell.h"
#include "nsIURI.h"
#include "nsITextToSubURI.h"
#include "nsError.h"
#include "nsView.h"
#include <algorithm>
// Print Options
#include "nsIPrintSettings.h"
#include "nsIPrintSettingsService.h"
#include "nsGkAtoms.h"
#include "nsXPCOM.h"
static const char sPrintSettingsServiceContractID[] =
"@mozilla.org/gfx/printsettings-service;1";
// Printing Timer
#include "nsPagePrintTimer.h"
// FrameSet
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DocumentInlines.h"
// Misc
#include "gfxContext.h"
#include "mozilla/gfx/DrawEventRecorder.h"
#include "mozilla/layout/RemotePrintJobChild.h"
#include "nsISupportsUtils.h"
#include "nsIScriptContext.h"
#include "nsComponentManagerUtils.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "Text.h"
#include "nsIDeviceContextSpec.h"
#include "nsDeviceContextSpecProxy.h"
#include "nsViewManager.h"
#include "nsPageSequenceFrame.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIWebBrowserChrome.h"
#include "mozilla/ReflowInput.h"
#include "nsIDocumentViewer.h"
#include "nsIDocumentViewerPrint.h"
#include "nsFocusManager.h"
#include "nsRange.h"
#include "mozilla/Components.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/HTMLFrameElement.h"
#include "mozilla/ServoStyleSet.h"
using namespace mozilla;
using namespace mozilla::dom;
//-----------------------------------------------------
// PR LOGGING
#include "mozilla/Logging.h"
#ifdef DEBUG
// PR_LOGGING is force to always be on (even in release builds)
// but we only want some of it on,
// #define EXTENDED_DEBUG_PRINTING
#endif
// this log level turns on the dumping of each document's layout info
#define DUMP_LAYOUT_LEVEL (static_cast<mozilla::LogLevel>(9))
#ifndef PR_PL
static mozilla::LazyLogModule gPrintingLog("printing");
# define PR_PL(_p1) MOZ_LOG(gPrintingLog, mozilla::LogLevel::Debug, _p1);
#endif
#ifdef EXTENDED_DEBUG_PRINTING
static uint32_t gDumpFileNameCnt = 0;
static uint32_t gDumpLOFileNameCnt = 0;
#endif
#define PRT_YESNO(_p) ((_p) ? "YES" : "NO")
inline const char* LoggableTypeOfPO(const nsPrintObject* aPO) {
// TODO(dholbert): These strings used to represent actual enum values, but
// the enum type has been removed. We could replace them with more
// descriptive names, if anyone uses this logging and cares to do so.
return aPO->mParent ? "eIFrame" : "eDoc";
}
inline const char* ShortLoggableTypeOfPO(const nsPrintObject* aPO) {
return aPO->mParent ? "IF" : "DC";
}
// This processes the selection on aOrigDoc and creates an inverted selection on
// aDoc, which it then deletes. If the start or end of the inverted selection
// ranges occur in text nodes then an ellipsis is added.
static nsresult DeleteNonSelectedNodes(Document& aDoc);
#ifdef EXTENDED_DEBUG_PRINTING
// Forward Declarations
static void DumpPrintObjectsListStart(const char* aStr,
const nsTArray<nsPrintObject*>& aDocList);
static void DumpPrintObjectsTree(nsPrintObject* aPO, int aLevel = 0,
FILE* aFD = nullptr);
static void DumpPrintObjectsTreeLayout(const UniquePtr<nsPrintObject>& aPO,
nsDeviceContext* aDC, int aLevel = 0,
FILE* aFD = nullptr);
# define DUMP_DOC_LIST(_title) \
DumpPrintObjectsListStart((_title), mPrintDocList);
# define DUMP_DOC_TREE DumpPrintObjectsTree(mPrintObject.get());
# define DUMP_DOC_TREELAYOUT \
DumpPrintObjectsTreeLayout(mPrintObject, mPrt->mPrintDC);
#else
# define DUMP_DOC_LIST(_title)
# define DUMP_DOC_TREE
# define DUMP_DOC_TREELAYOUT
#endif
// -------------------------------------------------------
// Helpers
// -------------------------------------------------------
/**
* Build a tree of nsPrintObjects under aPO. It also appends a (depth first)
* flat list of all the nsPrintObjects created to mPrintDocList. If
* one of the nsPrintObject's document is the focused document, then the print
* object is set as mSelectionRoot.
* @param aParentPO The parent nsPrintObject to populate, must not be null.
*/
void nsPrintJob::BuildNestedPrintObjects(
const UniquePtr<nsPrintObject>& aParentPO) {
MOZ_ASSERT(aParentPO);
// If aParentPO is for an iframe and its original document was the document
// that had focus then always set as the selection root.
if (aParentPO->mParent &&
aParentPO->mDocument->GetProperty(nsGkAtoms::printisfocuseddoc)) {
mSelectionRoot = aParentPO.get();
} else if (!mSelectionRoot && aParentPO->HasSelection()) {
// If there is no focused iframe but there is a selection in one or more
// frames then we want to set the root nsPrintObject as the focus root so
// that later EnablePrintingSelectionOnly can search for and enable all
// nsPrintObjects containing selections.
mSelectionRoot = mPrintObject.get();
}
for (auto& bc : aParentPO->mDocShell->GetBrowsingContext()->Children()) {
nsCOMPtr<nsIDocShell> docShell = bc->GetDocShell();
if (!docShell) {
if (auto* cc = dom::ContentChild::GetSingleton()) {
nsCOMPtr<nsIPrintSettingsService> printSettingsService =
do_GetService(sPrintSettingsServiceContractID);
embedding::PrintData printData;
printSettingsService->SerializeToPrintData(mPrintSettings, &printData);
Unused << cc->SendUpdateRemotePrintSettings(bc, printData);
}
continue;
}
RefPtr<Document> doc = docShell->GetDocument();
MOZ_DIAGNOSTIC_ASSERT(doc);
// We might find non-static documents here if the fission remoteness change
// hasn't happened / finished yet. In that case, just skip them, the same
// way we do for remote frames above.
MOZ_DIAGNOSTIC_ASSERT(doc->IsStaticDocument() || doc->IsInitialDocument());
if (!doc || !doc->IsStaticDocument()) {
continue;
}
// Note: docShell and doc are known-non-null at this point; they've been
// null-checked above (with null leading to 'continue' statements).
auto childPO = MakeUnique<nsPrintObject>(*docShell, *doc, aParentPO.get());
mPrintDocList.AppendElement(childPO.get());
BuildNestedPrintObjects(childPO);
aParentPO->mKids.AppendElement(std::move(childPO));
}
}
static nsresult GetDefaultPrintSettings(nsIPrintSettings** aSettings) {
*aSettings = nullptr;
nsresult rv = NS_ERROR_FAILURE;
nsCOMPtr<nsIPrintSettingsService> printSettingsService =
do_GetService(sPrintSettingsServiceContractID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
return printSettingsService->GetDefaultPrintSettingsForPrinting(aSettings);
}
//-------------------------------------------------------
NS_IMPL_ISUPPORTS(nsPrintJob, nsIWebProgressListener, nsISupportsWeakReference)
//-------------------------------------------------------
nsPrintJob::~nsPrintJob() {
Destroy(); // for insurance
DisconnectPagePrintTimer();
}
bool nsPrintJob::CheckBeforeDestroy() const { return mPreparingForPrint; }
//-------------------------------------------------------
void nsPrintJob::Destroy() {
if (mIsDestroying) {
return;
}
mIsDestroying = true;
DestroyPrintingData();
mDocViewerPrint = nullptr;
}
//-------------------------------------------------------
void nsPrintJob::DestroyPrintingData() {
mPrintObject = nullptr;
mPrt = nullptr;
}
nsPrintJob::nsPrintJob(nsIDocumentViewerPrint& aDocViewerPrint,
nsIDocShell& aDocShell, Document& aOriginalDoc,
float aScreenDPI)
: mDocViewerPrint(&aDocViewerPrint),
mDocShell(do_GetWeakReference(&aDocShell)),
mScreenDPI(aScreenDPI) {
// Any state that we need from aOriginalDoc must be fetched and stored
// here, since the document that the user selected to print may mutate
// across consecutive PrintPreview() calls.
Element* root = aOriginalDoc.GetRootElement();
mDisallowSelectionPrint =
root && root->HasAttr(nsGkAtoms::mozdisallowselectionprint);
}
//-----------------------------------------------------------------
std::tuple<nsPageSequenceFrame*, int32_t>
nsPrintJob::GetSeqFrameAndCountSheets() const {
if (NS_WARN_IF(!mPrt)) {
return {nullptr, 0};
}
const nsPrintObject* po = mPrintObject.get();
if (NS_WARN_IF(!po)) {
return {nullptr, 0};
}
// This is sometimes incorrectly called before the pres shell has been created
// (bug 1141756). MOZ_DIAGNOSTIC_ASSERT so we'll still see the crash in
// Nightly/Aurora in case the other patch fixes this.
if (!po->mPresShell) {
MOZ_DIAGNOSTIC_ASSERT(
false, "GetSeqFrameAndCountSheets needs a non-null pres shell");
return {nullptr, 0};
}
nsPageSequenceFrame* seqFrame = po->mPresShell->GetPageSequenceFrame();
if (!seqFrame) {
return {nullptr, 0};
}
// count the total number of sheets
return {seqFrame, seqFrame->PrincipalChildList().GetLength()};
}
// Foward decl for Debug Helper Functions
#ifdef EXTENDED_DEBUG_PRINTING
# ifdef XP_WIN
static int RemoveFilesInDir(const char* aDir);
# endif
static void GetDocTitleAndURL(const UniquePtr<nsPrintObject>& aPO,
nsACString& aDocStr, nsACString& aURLStr);
static void DumpPrintObjectsTree(nsPrintObject* aPO, int aLevel, FILE* aFD);
static void DumpPrintObjectsList(const nsTArray<nsPrintObject*>& aDocList);
static void RootFrameList(nsPresContext* aPresContext, FILE* out,
const char* aPrefix);
static void DumpViews(nsIDocShell* aDocShell, FILE* out);
static void DumpLayoutData(const char* aTitleStr, const char* aURLStr,
nsPresContext* aPresContext, nsDeviceContext* aDC,
nsIFrame* aRootFrame, nsIDocShell* aDocShell,
FILE* aFD);
#endif
//--------------------------------------------------------------------------------
nsresult nsPrintJob::CommonPrint(bool aIsPrintPreview,
nsIPrintSettings* aPrintSettings,
nsIWebProgressListener* aWebProgressListener,
Document& aSourceDoc) {
// Callers must hold a strong reference to |this| to ensure that we stay
// alive for the duration of this method, because our main owning reference
// (on nsDocumentViewer) might be cleared during this function (if we cause
// script to run and it cancels the print operation).
nsresult rv = DoCommonPrint(aIsPrintPreview, aPrintSettings,
aWebProgressListener, aSourceDoc);
if (NS_FAILED(rv)) {
if (aIsPrintPreview) {
mIsCreatingPrintPreview = false;
SetIsPrintPreview(false);
} else {
SetIsPrinting(false);
}
if (rv != NS_ERROR_ABORT && rv != NS_ERROR_OUT_OF_MEMORY) {
FirePrintingErrorEvent(rv);
}
DestroyPrintingData();
}
return rv;
}
nsresult nsPrintJob::DoCommonPrint(bool aIsPrintPreview,
nsIPrintSettings* aPrintSettings,
nsIWebProgressListener* aWebProgressListener,
Document& aDoc) {
MOZ_ASSERT(aDoc.IsStaticDocument());
nsresult rv;
// Grab the new instance with local variable to guarantee that it won't be
// deleted during this method.
// Note: Methods we call early below rely on mPrt being set.
mPrt = new nsPrintData(aIsPrintPreview ? nsPrintData::eIsPrintPreview
: nsPrintData::eIsPrinting);
RefPtr<nsPrintData> printData = mPrt;
if (aIsPrintPreview) {
mIsCreatingPrintPreview = true;
SetIsPrintPreview(true);
} else {
SetIsPrinting(true);
}
if (aWebProgressListener) {
printData->mPrintProgressListeners.AppendObject(aWebProgressListener);
}
if (mRemotePrintJob) {
// If we have a RemotePrintJob add it to the print progress listeners,
// so it can forward to the parent.
printData->mPrintProgressListeners.AppendElement(mRemotePrintJob);
}
// Get the docshell for this documentviewer
nsCOMPtr<nsIDocShell> docShell(do_QueryReferent(mDocShell, &rv));
NS_ENSURE_SUCCESS(rv, rv);
// if they don't pass in a PrintSettings, then get the Global PS
mPrintSettings = aPrintSettings;
if (!mPrintSettings) {
MOZ_TRY(GetDefaultPrintSettings(getter_AddRefs(mPrintSettings)));
}
{
nsAutoScriptBlocker scriptBlocker;
// Note: docShell is implicitly non-null via do_QueryReferent necessarily
// having succeeded (if we got here).
mPrintObject = MakeUnique<nsPrintObject>(*docShell, aDoc);
mPrintDocList.AppendElement(mPrintObject.get());
BuildNestedPrintObjects(mPrintObject);
}
// The nsAutoScriptBlocker above will now have been destroyed, which may
// cause our print/print-preview operation to finish. In this case, we
// should immediately return an error code so that the root caller knows
// it shouldn't continue to do anything with this instance.
if (mIsDestroying) {
return NS_ERROR_FAILURE;
}
// XXX This isn't really correct...
if (!mPrintObject->mDocument || !mPrintObject->mDocument->GetRootElement())
return NS_ERROR_GFX_PRINTER_STARTDOC;
mPrintSettings->GetShrinkToFit(&mShrinkToFit);
nsCOMPtr<nsIDeviceContextSpec> devspec;
if (XRE_IsContentProcess()) {
devspec = new nsDeviceContextSpecProxy(mRemotePrintJob);
} else {
devspec = do_CreateInstance("@mozilla.org/gfx/devicecontextspec;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
}
bool printSilently = false;
mPrintSettings->GetPrintSilent(&printSilently);
if (StaticPrefs::print_always_print_silent()) {
printSilently = true;
}
if (mIsDoingPrinting && printSilently) {
Telemetry::ScalarAdd(Telemetry::ScalarID::PRINTING_SILENT_PRINT, 1);
}
MOZ_TRY(devspec->Init(mPrintSettings, mIsCreatingPrintPreview));
printData->mPrintDC = new nsDeviceContext();
MOZ_TRY(printData->mPrintDC->InitForPrinting(devspec));
MOZ_TRY(EnablePOsForPrinting());
if (!mIsCreatingPrintPreview) {
printData->OnStartPrinting();
}
InitPrintDocConstruction(false);
return NS_OK;
}
//---------------------------------------------------------------------------------
nsresult nsPrintJob::Print(Document& aDoc, nsIPrintSettings* aPrintSettings,
RemotePrintJobChild* aRemotePrintJob,
nsIWebProgressListener* aWebProgressListener) {
mRemotePrintJob = aRemotePrintJob;
return CommonPrint(false, aPrintSettings, aWebProgressListener, aDoc);
}
nsresult nsPrintJob::PrintPreview(Document& aDoc,
nsIPrintSettings* aPrintSettings,
nsIWebProgressListener* aWebProgressListener,
PrintPreviewResolver&& aCallback) {
// Take ownership of aCallback, otherwise a function further up the call
// stack will call it to signal failure (by passing zero).
mPrintPreviewCallback = std::move(aCallback);
nsresult rv = CommonPrint(true, aPrintSettings, aWebProgressListener, aDoc);
if (NS_FAILED(rv)) {
if (mPrintPreviewCallback) {
// signal error
mPrintPreviewCallback(
PrintPreviewResultInfo(0, 0, false, false, false, {}, {}, {}));
mPrintPreviewCallback = nullptr;
}
}
return rv;
}
int32_t nsPrintJob::GetRawNumPages() const {
auto [seqFrame, numSheets] = GetSeqFrameAndCountSheets();
Unused << numSheets;
return seqFrame ? seqFrame->GetRawNumPages() : 0;
}
bool nsPrintJob::GetIsEmpty() const {
auto [seqFrame, numSheets] = GetSeqFrameAndCountSheets();
if (!seqFrame) {
return true;
}
if (numSheets > 1) {
return false;
}
return !seqFrame->GetPagesInFirstSheet();
}
int32_t nsPrintJob::GetPrintPreviewNumSheets() const {
auto [seqFrame, numSheets] = GetSeqFrameAndCountSheets();
Unused << seqFrame;
return numSheets;
}
//-----------------------------------------------------------------
//-- Section: Pre-Reflow Methods
//-----------------------------------------------------------------
// static
void nsPrintJob::GetDisplayTitleAndURL(Document& aDoc,
nsIPrintSettings* aSettings,
DocTitleDefault aTitleDefault,
nsAString& aTitle, nsAString& aURLStr) {
aTitle.Truncate();
aURLStr.Truncate();
if (aSettings) {
aSettings->GetTitle(aTitle);
aSettings->GetDocURL(aURLStr);
}
if (aTitle.IsEmpty()) {
aDoc.GetTitle(aTitle);
if (aTitle.IsEmpty()) {
if (!aURLStr.IsEmpty() &&
aTitleDefault == DocTitleDefault::eDocURLElseFallback) {
aTitle = aURLStr;
} else {
nsCOMPtr<nsIStringBundle> brandBundle;
nsCOMPtr<nsIStringBundleService> svc =
mozilla::components::StringBundle::Service();
if (svc) {
getter_AddRefs(brandBundle));
if (brandBundle) {
brandBundle->GetStringFromName("brandShortName", aTitle);
}
}
if (aTitle.IsEmpty()) {
aTitle.AssignLiteral(u"Mozilla Document");
}
}
}
}
if (aURLStr.IsEmpty()) {
nsIURI* url = aDoc.GetDocumentURI();
if (!url) {
return;
}
nsCOMPtr<nsIURI> exposableURI = net::nsIOService::CreateExposableURI(url);
nsAutoCString urlCStr;
nsresult rv = exposableURI->GetSpec(urlCStr);
if (NS_FAILED(rv)) {
return;
}
nsCOMPtr<nsITextToSubURI> textToSubURI =
do_GetService(NS_ITEXTTOSUBURI_CONTRACTID, &rv);
if (NS_FAILED(rv)) {
return;
}
textToSubURI->UnEscapeURIForUI(urlCStr, aURLStr);
}
}
//---------------------------------------------------------------------
nsresult nsPrintJob::DocumentReadyForPrinting() {
// Send the document to the printer...
nsresult rv = SetupToPrintContent();
if (NS_FAILED(rv)) {
// The print job was canceled or there was a problem
// So remove all other documents from the print list
DonePrintingSheets(nullptr, rv);
}
return rv;
}
/** ---------------------------------------------------
* Cleans up when an error occurred
*/
nsresult nsPrintJob::CleanupOnFailure(nsresult aResult, bool aIsPrinting) {
PR_PL(("**** Failed %s - rv 0x%" PRIX32,
aIsPrinting ? "Printing" : "Print Preview",
static_cast<uint32_t>(aResult)));
PROFILER_MARKER_TEXT("PrintJob", LAYOUT_Printing, MarkerStack::Capture(),
"nsPrintJob::CleanupOnFailure"_ns);
/* cleanup... */
if (mPagePrintTimer) {
mPagePrintTimer->Stop();
DisconnectPagePrintTimer();
}
if (aIsPrinting) {
SetIsPrinting(false);
} else {
SetIsPrintPreview(false);
mIsCreatingPrintPreview = false;
}
/* cleanup done, let's fire-up an error dialog to notify the user
* what went wrong...
*
* When rv == NS_ERROR_ABORT, it means we want out of the
* print job without displaying any error messages
*/
if (aResult != NS_ERROR_ABORT) {
FirePrintingErrorEvent(aResult);
}
FirePrintCompletionEvent();
return aResult;
}
//---------------------------------------------------------------------
void nsPrintJob::FirePrintingErrorEvent(nsresult aPrintError) {
if (mPrintPreviewCallback) {
// signal error
mPrintPreviewCallback(
PrintPreviewResultInfo(0, 0, false, false, false, {}, {}, {}));
mPrintPreviewCallback = nullptr;
}
nsCOMPtr<nsIDocumentViewer> viewer = do_QueryInterface(mDocViewerPrint);
if (NS_WARN_IF(!viewer)) {
return;
}
const RefPtr<Document> doc = viewer->GetDocument();
const RefPtr<CustomEvent> event = NS_NewDOMCustomEvent(doc, nullptr, nullptr);
MOZ_ASSERT(event);
AutoJSAPI jsapi;
if (!jsapi.Init(event->GetParentObject())) {
return;
}
JSContext* cx = jsapi.cx();
JS::Rooted<JS::Value> detail(
cx, JS::NumberValue(static_cast<double>(aPrintError)));
event->InitCustomEvent(cx, u"PrintingError"_ns, false, false, detail);
event->SetTrusted(true);
// Event listeners in chrome shouldn't delete this.
AsyncEventDispatcher::RunDOMEventWhenSafe(*doc, *event,
ChromeOnlyDispatch::eYes);
// Inform any progress listeners of the Error.
if (mPrt) {
// Note that nsPrintData::DoOnStatusChange() will call some listeners.
// So, mPrt can be cleared or recreated.
RefPtr<nsPrintData> printData = mPrt;
printData->DoOnStatusChange(aPrintError);
}
}
//-----------------------------------------------------------------
//-- Section: Reflow Methods
//-----------------------------------------------------------------
nsresult nsPrintJob::ReconstructAndReflow() {
if (NS_WARN_IF(!mPrt)) {
return NS_ERROR_FAILURE;
}
#if defined(XP_WIN) && defined(EXTENDED_DEBUG_PRINTING)
// We need to clear all the output files here
// because they will be re-created with second reflow of the docs
if (MOZ_LOG_TEST(gPrintingLog, DUMP_LAYOUT_LEVEL)) {
RemoveFilesInDir(".\\");
gDumpFileNameCnt = 0;
gDumpLOFileNameCnt = 0;
}
#endif
// In this loop, it's conceivable that one of our helpers might clear mPrt,
// while we're using it & its members! So we capture it in an owning local
// reference & use that instead of using mPrt directly.
RefPtr<nsPrintData> printData = mPrt;
for (nsPrintObject* po : mPrintDocList) {
if (!po->PrintingIsEnabled() || po->mInvisible) {
continue;
}
// When the print object has been marked as "print the document" (i.e,
// po->PrintingIsEnabled() is true), mPresContext and mPresShell should be
// non-nullptr (i.e., should've been created for the print) since they
// are necessary to print the document.
MOZ_ASSERT(po->mPresContext && po->mPresShell,
"mPresContext and mPresShell shouldn't be nullptr when the "
"print object "
"has been marked as \"print the document\"");
UpdateZoomRatio(po);
po->mPresContext->SetPageScale(po->mZoomRatio);
// Calculate scale factor from printer to screen
float printDPI = float(AppUnitsPerCSSInch()) /
float(printData->mPrintDC->AppUnitsPerDevPixel());
po->mPresContext->SetPrintPreviewScale(mScreenDPI / printDPI);
RefPtr<PresShell> presShell(po->mPresShell);
if (NS_WARN_IF(presShell->IsDestroying())) {
return NS_ERROR_FAILURE;
}
presShell->ReconstructFrames();
// If the printing was canceled or restarted with different data,
// let's stop doing this printing.
if (NS_WARN_IF(mPrt != printData)) {
return NS_ERROR_FAILURE;
}
// For all views except the first one, setup the root view.
// ??? Can there be multiple po for the top-level-document?
bool documentIsTopLevel = true;
if (po->mParent) {
nsSize adjSize;
bool doReturn;
nsresult rv = SetRootView(po, doReturn, documentIsTopLevel, adjSize);
MOZ_ASSERT(!documentIsTopLevel, "How could this happen?");
if (NS_FAILED(rv) || doReturn) {
return rv;
}
}
presShell->FlushPendingNotifications(FlushType::Layout);
if (NS_WARN_IF(presShell->IsDestroying())) {
return NS_ERROR_FAILURE;
}
// If the printing was canceled or restarted with different data,
// let's stop doing this printing.
if (NS_WARN_IF(mPrt != printData)) {
return NS_ERROR_FAILURE;
}
nsresult rv = UpdateSelectionAndShrinkPrintObject(po, documentIsTopLevel);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
//-------------------------------------------------------
nsresult nsPrintJob::SetupToPrintContent() {
// This method may be called while DoCommonPrint() initializes the instance
// when its script blocker goes out of scope. In such case, this cannot do
// its job as expected because some objects in mPrt have not been initialized
// yet but they are necessary.
// Note: it shouldn't be possible for mPrintObject to be null; we check
// it for good measure (after we check its owner) before we start
// dereferencing it below.
if (NS_WARN_IF(!mPrt) || NS_WARN_IF(!mPrintObject)) {
return NS_ERROR_FAILURE;
}
// If this is creating print preview, mPrintObject->mPresContext and
// mPrintObject->mPresShell need to be non-nullptr because this cannot
// initialize page sequence frame without them at end of this method since
// page sequence frame has already been destroyed or not been created yet.
if (mIsCreatingPrintPreview && (NS_WARN_IF(!mPrintObject->mPresContext) ||
NS_WARN_IF(!mPrintObject->mPresShell))) {
return NS_ERROR_FAILURE;
}
// If this is printing some documents (not print-previewing the documents),
// mPrintObject->mPresContext and mPrintObject->mPresShell can be
// nullptr only when mPrintObject->PrintingIsEnabled() is false. E.g.,
// if the document has a <frameset> element and it's printing only content in
// a <frame> element or all <frame> elements separately.
MOZ_ASSERT(
(!mIsCreatingPrintPreview && !mPrintObject->PrintingIsEnabled()) ||
(mPrintObject->mPresContext && mPrintObject->mPresShell),
"mPresContext and mPresShell shouldn't be nullptr when printing the "
"document or creating print-preview");
bool didReconstruction = false;
// This method works with mPrintObject. So, we need to guarantee that
// it won't be deleted in this method. We achieve this by holding a strong
// local reference to mPrt, which in turn keeps mPrintObject alive.
RefPtr<nsPrintData> printData = mPrt;
// If some new content got loaded since the initial reflow rebuild
// everything.
if (mDidLoadDataForPrinting) {
nsresult rv = ReconstructAndReflow();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// If the printing was canceled or restarted with different data,
// let's stop doing this printing.
if (NS_WARN_IF(mPrt != printData)) {
return NS_ERROR_FAILURE;
}
didReconstruction = true;
}
// Here is where we figure out if extra reflow for shrinking the content
// is required.
if (mShrinkToFit) {
mShrinkToFitFactor = mPrintObject->mShrinkRatio;
if (mShrinkToFitFactor < 0.998f) {
nsresult rv = ReconstructAndReflow();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// If the printing was canceled or restarted with different data,
// let's stop doing this printing.
if (NS_WARN_IF(mPrt != printData)) {
return NS_ERROR_FAILURE;
}
didReconstruction = true;
}
if (MOZ_LOG_TEST(gPrintingLog, LogLevel::Debug)) {
float calcRatio = mPrintObject->mShrinkRatio;
PR_PL(
("*******************************************************************"
"*******\n"));
PR_PL(("STF Ratio is: %8.5f Effective Ratio: %8.5f Diff: %8.5f\n",
mShrinkToFitFactor, calcRatio, mShrinkToFitFactor - calcRatio));
PR_PL(
("*******************************************************************"
"*******\n"));
}
}
// If the frames got reconstructed and reflowed the number of pages might
// has changed.
if (didReconstruction) {
FirePrintPreviewUpdateEvent();
// If the printing was canceled or restarted with different data,
// let's stop doing this printing.
if (NS_WARN_IF(mPrt != printData)) {
return NS_ERROR_FAILURE;
}
}
DUMP_DOC_LIST(("\nAfter Reflow------------------------------------------"));
PR_PL(("\n"));
PR_PL(("-------------------------------------------------------\n"));
PR_PL(("\n"));
CalcNumPrintablePages(mNumPrintablePages);
PR_PL(("--- Printing %d pages\n", mNumPrintablePages));
DUMP_DOC_TREELAYOUT;
// Print listener setup...
printData->OnStartPrinting();
// If the printing was canceled or restarted with different data,
// let's stop doing this printing.
if (NS_WARN_IF(mPrt != printData)) {
return NS_ERROR_FAILURE;
}
nsAutoString fileNameStr;
// check to see if we are printing to a file
if (mPrintSettings->GetOutputDestination() ==
nsIPrintSettings::kOutputDestinationFile) {
// On some platforms the BeginDocument needs to know the name of the file.
mPrintSettings->GetToFileName(fileNameStr);
}
nsAutoString docTitleStr;
nsAutoString docURLStr;
GetDisplayTitleAndURL(*mPrintObject->mDocument, mPrintSettings,
DocTitleDefault::eDocURLElseFallback, docTitleStr,
docURLStr);
int32_t startPage = 1;
int32_t endPage = mNumPrintablePages;
nsTArray<int32_t> ranges;
mPrintSettings->GetPageRanges(ranges);
for (size_t i = 0; i < ranges.Length(); i += 2) {
startPage = std::max(1, std::min(startPage, ranges[i]));
endPage = std::min(mNumPrintablePages, std::max(endPage, ranges[i + 1]));
}
nsresult rv = NS_OK;
// BeginDocument may pass back a FAILURE code
// i.e. On Windows, if you are printing to a file and hit "Cancel"
// to the "File Name" dialog, this comes back as an error
// Don't start printing when regression test are executed
if (mIsDoingPrinting) {
rv = printData->mPrintDC->BeginDocument(docTitleStr, fileNameStr, startPage,
endPage);
}
if (mIsCreatingPrintPreview) {
// Copy docTitleStr and docURLStr to the pageSequenceFrame, to be displayed
// in the header
nsPageSequenceFrame* seqFrame =
mPrintObject->mPresShell->GetPageSequenceFrame();
if (seqFrame) {
seqFrame->StartPrint(mPrintObject->mPresContext, mPrintSettings,
docTitleStr, docURLStr);
}
}
PR_PL(("****************** Begin Document ************************\n"));
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_ABORT,
"Failed to begin document for printing");
return rv;
}
// This will print the docshell document
// when it completes asynchronously in the DonePrintingSheets method
// it will check to see if there are more docshells to be printed and
// then PrintDocContent will be called again.
if (mIsDoingPrinting) {
// Double-check that mPrintObject is non-null, because it could have
// gotten cleared while running script since we last checked it.
if (NS_WARN_IF(!mPrintObject)) {
return NS_ERROR_FAILURE;
}
PrintDocContent(mPrintObject, rv); // ignore return value
}
return rv;
}
//-------------------------------------------------------
// Recursively reflow each sub-doc and then calc
// all the frame locations of the sub-docs
nsresult nsPrintJob::ReflowDocList(const UniquePtr<nsPrintObject>& aPO) {
NS_ENSURE_ARG_POINTER(aPO);
// Check to see if the subdocument's element has been hidden by the parent
// document
if (aPO->mParent && aPO->mParent->mPresShell) {
nsIFrame* frame =
aPO->mContent ? aPO->mContent->GetPrimaryFrame() : nullptr;
if (!frame || !frame->StyleVisibility()->IsVisible()) {
aPO->EnablePrinting(false);
aPO->mInvisible = true;
return NS_OK;
}
}
UpdateZoomRatio(aPO.get());
// Reflow the PO
MOZ_TRY(ReflowPrintObject(aPO));
for (const UniquePtr<nsPrintObject>& kid : aPO->mKids) {
MOZ_TRY(ReflowDocList(kid));
}
return NS_OK;
}
void nsPrintJob::FirePrintPreviewUpdateEvent() {
// Dispatch the event only while in PrintPreview. When printing, there is no
// listener bound to this event and therefore no need to dispatch it.
if (mCreatedForPrintPreview && !mIsDoingPrinting) {
nsCOMPtr<nsIDocumentViewer> viewer = do_QueryInterface(mDocViewerPrint);
if (Document* document = viewer->GetDocument()) {
AsyncEventDispatcher::RunDOMEventWhenSafe(
*document, u"printPreviewUpdate"_ns, CanBubble::eYes,
ChromeOnlyDispatch::eYes);
}
}
}
nsresult nsPrintJob::InitPrintDocConstruction(bool aHandleError) {
// Guarantee that mPrintObject won't be deleted.
RefPtr<nsPrintData> printData = mPrt;
if (NS_WARN_IF(!printData)) {
return NS_ERROR_FAILURE;
}
// Attach progressListener to catch network requests.
mDidLoadDataForPrinting = false;
{
AutoRestore<bool> restore{mDoingInitialReflow};
mDoingInitialReflow = true;
nsCOMPtr<nsIWebProgress> webProgress =
do_QueryInterface(mPrintObject->mDocShell);
webProgress->AddProgressListener(static_cast<nsIWebProgressListener*>(this),
nsIWebProgress::NOTIFY_STATE_REQUEST);
MOZ_TRY(ReflowDocList(mPrintObject));
FirePrintPreviewUpdateEvent();
}
MaybeResumePrintAfterResourcesLoaded(aHandleError);
return NS_OK;
}
bool nsPrintJob::ShouldResumePrint() const {
if (mDoingInitialReflow) {
return false;
}
Document* doc = mPrintObject->mDocument;
MOZ_ASSERT(doc);
NS_ENSURE_TRUE(doc, true);
nsCOMPtr<nsILoadGroup> lg = doc->GetDocumentLoadGroup();
NS_ENSURE_TRUE(lg, true);
bool pending = false;
nsresult rv = lg->IsPending(&pending);
NS_ENSURE_SUCCESS(rv, true);
return !pending;
}
nsresult nsPrintJob::MaybeResumePrintAfterResourcesLoaded(
bool aCleanupOnError) {
if (!ShouldResumePrint()) {
mDidLoadDataForPrinting = true;
return NS_OK;
}
// If Destroy() has already been called, mPtr is nullptr. Then, the instance
// needs to do nothing anymore in this method.
// Note: it shouldn't be possible for mPrintObject to be null; we
// just check it for good measure, as we check its owner.
// Note: it shouldn't be possible for mPrintObject->mDocShell to be
// null; we just check it for good measure, as we check its owner.
if (!mPrt || NS_WARN_IF(!mPrintObject) ||
NS_WARN_IF(!mPrintObject->mDocShell)) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIWebProgress> webProgress =
do_QueryInterface(mPrintObject->mDocShell);
webProgress->RemoveProgressListener(
static_cast<nsIWebProgressListener*>(this));
nsresult rv;
if (mIsDoingPrinting) {
rv = DocumentReadyForPrinting();
} else {
rv = FinishPrintPreview();
}
/* cleaup on failure + notify user */
if (aCleanupOnError && NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_ABORT,
"nsPrintJob::ResumePrintAfterResourcesLoaded failed");
CleanupOnFailure(rv, !mIsDoingPrinting);
}
return rv;
}
////////////////////////////////////////////////////////////////////////////////
// nsIWebProgressListener
MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHODIMP
nsPrintJob::OnStateChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
uint32_t aStateFlags, nsresult aStatus) {
if (aStateFlags & STATE_STOP) {
// If all resources are loaded, then finish and reflow.
MaybeResumePrintAfterResourcesLoaded(/* aCleanupOnError */ true);
}
return NS_OK;
}
NS_IMETHODIMP
nsPrintJob::OnProgressChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
int32_t aCurSelfProgress, int32_t aMaxSelfProgress,
int32_t aCurTotalProgress,
int32_t aMaxTotalProgress) {
MOZ_ASSERT_UNREACHABLE("notification excluded in AddProgressListener(...)");
return NS_OK;
}
NS_IMETHODIMP
nsPrintJob::OnLocationChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
nsIURI* aLocation, uint32_t aFlags) {
MOZ_ASSERT_UNREACHABLE("notification excluded in AddProgressListener(...)");
return NS_OK;
}
NS_IMETHODIMP
nsPrintJob::OnStatusChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
nsresult aStatus, const char16_t* aMessage) {
MOZ_ASSERT_UNREACHABLE("notification excluded in AddProgressListener(...)");
return NS_OK;
}
NS_IMETHODIMP
nsPrintJob::OnSecurityChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
uint32_t aState) {
MOZ_ASSERT_UNREACHABLE("notification excluded in AddProgressListener(...)");
return NS_OK;
}
NS_IMETHODIMP
nsPrintJob::OnContentBlockingEvent(nsIWebProgress* aWebProgress,
nsIRequest* aRequest, uint32_t aEvent) {
MOZ_ASSERT_UNREACHABLE("notification excluded in AddProgressListener(...)");
return NS_OK;
}
//-------------------------------------------------------
void nsPrintJob::UpdateZoomRatio(nsPrintObject* aPO) {
if (!aPO->mParent) {
if (mShrinkToFit) {
aPO->mZoomRatio = mShrinkToFitFactor;
// If we're actually going to scale (the factor is less than 1), we
// reduce the scale factor slightly to avoid the possibility of floating
// point rounding error causing slight clipping of the longest lines.
if (aPO->mZoomRatio != 1.0f) {
aPO->mZoomRatio -= 0.005f;
}
} else {
double scaling;
mPrintSettings->GetScaling(&scaling);
aPO->mZoomRatio = float(scaling);
}
}
}
nsresult nsPrintJob::UpdateSelectionAndShrinkPrintObject(
nsPrintObject* aPO, bool aDocumentIsTopLevel) {
PresShell* displayPresShell = aPO->mDocShell->GetPresShell();
// Transfer Selection Ranges to the new Print PresShell
RefPtr<Selection> selection, selectionPS;
// It's okay if there is no display shell, just skip copying the selection
if (displayPresShell) {
selection = displayPresShell->GetCurrentSelection(SelectionType::eNormal);
}
selectionPS = aPO->mPresShell->GetCurrentSelection(SelectionType::eNormal);
// Reset all existing selection ranges that might have been added by calling
// this function before.
if (selectionPS) {
selectionPS->RemoveAllRanges(IgnoreErrors());
}
if (selection && selectionPS) {
const uint32_t rangeCount = selection->RangeCount();
for (const uint32_t inx : IntegerRange(rangeCount)) {
MOZ_ASSERT(selection->RangeCount() == rangeCount);
const RefPtr<nsRange> range{selection->GetRangeAt(inx)};
selectionPS->AddRangeAndSelectFramesAndNotifyListeners(*range,
IgnoreErrors());
}
}
// If we are trying to shrink the contents to fit on the page
// we must first locate the "pageContent" frame
// Then we walk the frame tree and look for the "xmost" frame
// this is the frame where the right-hand side of the frame extends
// the furthest
if (mShrinkToFit && aDocumentIsTopLevel) {
nsPageSequenceFrame* pageSeqFrame = aPO->mPresShell->GetPageSequenceFrame();
NS_ENSURE_STATE(pageSeqFrame);
aPO->mShrinkRatio = pageSeqFrame->GetSTFPercent();
// Limit the shrink-to-fit scaling for some text-ish type of documents.
nsAutoString contentType;
aPO->mPresShell->GetDocument()->GetContentType(contentType);
if (contentType.EqualsLiteral("application/xhtml+xml") ||
StringBeginsWith(contentType, u"text/"_ns)) {
int32_t limitPercent =
Preferences::GetInt("print.shrink-to-fit.scale-limit-percent", 20);
limitPercent = std::max(0, limitPercent);
limitPercent = std::min(100, limitPercent);
float minShrinkRatio = float(limitPercent) / 100;
aPO->mShrinkRatio = std::max(aPO->mShrinkRatio, minShrinkRatio);
}
}
return NS_OK;
}
nsView* nsPrintJob::GetParentViewForRoot() {
if (mIsCreatingPrintPreview) {
if (nsCOMPtr<nsIDocumentViewer> viewer =
do_QueryInterface(mDocViewerPrint)) {
return viewer->FindContainerView();
}
}
return nullptr;
}
nsresult nsPrintJob::SetRootView(nsPrintObject* aPO, bool& doReturn,
bool& documentIsTopLevel, nsSize& adjSize) {
bool canCreateScrollbars = true;
nsView* rootView;
nsView* parentView = nullptr;
doReturn = false;
if (aPO->mParent && aPO->mParent->PrintingIsEnabled()) {
nsIFrame* frame =
aPO->mContent ? aPO->mContent->GetPrimaryFrame() : nullptr;
// Without a frame, this document can't be displayed; therefore, there is no
// point to reflowing it
if (!frame) {
aPO->EnablePrinting(false);
doReturn = true;
return NS_OK;
}
// XXX If printing supported printing document hierarchies with non-constant
// zoom this would be wrong as we use the same mPrt->mPrintDC for all
// subdocuments.
adjSize = frame->GetContentRect().Size();
documentIsTopLevel = false;
// presshell exists because parent is printable
// the top nsPrintObject's widget will always have scrollbars
if (frame && frame->IsSubDocumentFrame()) {
nsView* view = frame->GetView();
NS_ENSURE_TRUE(view, NS_ERROR_FAILURE);
view = view->GetFirstChild();
NS_ENSURE_TRUE(view, NS_ERROR_FAILURE);
parentView = view;
canCreateScrollbars = false;
}
} else {
nscoord pageWidth, pageHeight;
mPrt->mPrintDC->GetDeviceSurfaceDimensions(pageWidth, pageHeight);
adjSize = nsSize(pageWidth, pageHeight);
documentIsTopLevel = true;
parentView = GetParentViewForRoot();
}
if (aPO->mViewManager->GetRootView()) {
// Reuse the root view that is already on the root frame.
rootView = aPO->mViewManager->GetRootView();
// Remove it from its existing parent if necessary
aPO->mViewManager->RemoveChild(rootView);
rootView->SetParent(parentView);
} else {
// Create a child window of the parent that is our "root view/window"
nsRect tbounds = nsRect(nsPoint(0, 0), adjSize);
rootView = aPO->mViewManager->CreateView(tbounds, parentView);
NS_ENSURE_TRUE(rootView, NS_ERROR_OUT_OF_MEMORY);
}
if (mIsCreatingPrintPreview && documentIsTopLevel) {
aPO->mPresContext->SetPaginatedScrolling(canCreateScrollbars);
}
// Setup hierarchical relationship in view manager
aPO->mViewManager->SetRootView(rootView);
return NS_OK;
}
// Reflow a nsPrintObject
nsresult nsPrintJob::ReflowPrintObject(const UniquePtr<nsPrintObject>& aPO) {
NS_ENSURE_STATE(aPO);
if (!aPO->PrintingIsEnabled()) {
return NS_OK;
}
NS_ASSERTION(!aPO->mPresContext, "Recreating prescontext");
// Guarantee that mPrt and the objects it owns won't be deleted in this method
// because it might be cleared if other modules called from here may fire
// events, notifying observers and/or listeners.
RefPtr<nsPrintData> printData = mPrt;
// create the PresContext
nsPresContext::nsPresContextType type =
mIsCreatingPrintPreview ? nsPresContext::eContext_PrintPreview
: nsPresContext::eContext_Print;
const bool shouldBeRoot =
(!aPO->mParent || !aPO->mParent->PrintingIsEnabled()) &&
!GetParentViewForRoot();
aPO->mPresContext = shouldBeRoot ? new nsRootPresContext(aPO->mDocument, type)
: new nsPresContext(aPO->mDocument, type);
aPO->mPresContext->SetPrintSettings(mPrintSettings);
// init it with the DC
MOZ_TRY(aPO->mPresContext->Init(printData->mPrintDC));
aPO->mViewManager = new nsViewManager();
MOZ_TRY(aPO->mViewManager->Init(printData->mPrintDC));
bool doReturn = false;
bool documentIsTopLevel = false;
nsSize adjSize;
nsresult rv = SetRootView(aPO.get(), doReturn, documentIsTopLevel, adjSize);
if (NS_FAILED(rv) || doReturn) {
return rv;
}
// Here, we inform nsPresContext of the page size. Note that 'adjSize' is
// *usually* the page size, but we need to check. Strictly speaking, adjSize
// is the *device output size*, which is really the dimensions of a "sheet"
// rather than a "page" (an important distinction in an N-pages-per-sheet
// scenario). For some pages-per-sheet values, the pages are orthogonal to
// the sheet; we adjust for that here by swapping the width with the height.
nsSize pageSize = adjSize;
if (mPrintSettings->HasOrthogonalPagesPerSheet()) {
std::swap(pageSize.width, pageSize.height);
}
// XXXalaskanemily: Is this actually necessary? We set it again before the
// first reflow.
aPO->mPresContext->SetPageSize(pageSize);
int32_t p2a = aPO->mPresContext->DeviceContext()->AppUnitsPerDevPixel();
if (documentIsTopLevel && mIsCreatingPrintPreview) {
if (nsCOMPtr<nsIDocumentViewer> viewer =
do_QueryInterface(mDocViewerPrint)) {
// If we're print-previewing and the top level document, use the bounds
// from our doc viewer. Page bounds is not what we want.
nsIntRect bounds;
viewer->GetBounds(bounds);
adjSize = nsSize(bounds.width * p2a, bounds.height * p2a);
}
}
aPO->mPresContext->SetIsRootPaginatedDocument(documentIsTopLevel);
aPO->mPresContext->SetVisibleArea(nsRect(nsPoint(), adjSize));
aPO->mPresContext->SetPageScale(aPO->mZoomRatio);
// Calculate scale factor from printer to screen
float printDPI = float(AppUnitsPerCSSInch()) / float(p2a);
aPO->mPresContext->SetPrintPreviewScale(mScreenDPI / printDPI);
// Do CreatePresShell() after we setup the page size, the visible area, and
// the flag |mIsRootPaginatedDocument|, to make sure we can resolve the
// correct viewport size for the print preview page when notifying the media
// feature values changed. See au_viewport_size_for_viewport_unit_resolution()
// in media_queries.rs for more details.
RefPtr<Document> doc = aPO->mDocument;
RefPtr<nsPresContext> presContext = aPO->mPresContext;
RefPtr<nsViewManager> viewManager = aPO->mViewManager;
aPO->mPresShell = doc->CreatePresShell(presContext, viewManager);
if (!aPO->mPresShell) {
return NS_ERROR_FAILURE;
}
// If we're printing selection then remove the nonselected nodes from our
// cloned document.
if (mPrintSettings->GetPrintSelectionOnly()) {
// If we fail to remove the nodes then we should fail to print, because if
// the user was trying to print a small selection from a large document,
// sending the whole document to a real printer would be very frustrating.
MOZ_TRY(DeleteNonSelectedNodes(*aPO->mDocument));
}
aPO->mPresShell->BeginObservingDocument();
PR_PL(
("In DV::ReflowPrintObject PO: %p pS: %p (%9s) Setting page size w,h to "
"%d,%d\n",
aPO.get(), aPO->mPresShell.get(), LoggableTypeOfPO(aPO.get()),
pageSize.width, pageSize.height));
if (mIsCreatingPrintPreview && documentIsTopLevel) {
mDocViewerPrint->SetPrintPreviewPresentation(
aPO->mViewManager, aPO->mPresContext, aPO->mPresShell.get());
}
MOZ_TRY(aPO->mPresShell->Initialize());
NS_ASSERTION(aPO->mPresShell, "Presshell should still be here");
RefPtr<PresShell> presShell = aPO->mPresShell;
{
const ServoStyleSet::PageSizeAndOrientation sizeAndOrientation =
presShell->StyleSet()->GetDefaultPageSizeAndOrientation();
// XXX Should we enable this for known save-to-PDF pseudo-printers once
// bug 1826301 is fixed?
if (mPrintSettings->GetOutputFormat() ==
nsIPrintSettings::kOutputFormatPDF &&
StaticPrefs::
print_save_as_pdf_use_page_rule_size_as_paper_size_enabled()) {
mMaybeCSSPageSize = sizeAndOrientation.size;
if (sizeAndOrientation.size) {
pageSize = sizeAndOrientation.size.value();
aPO->mPresContext->SetPageSize(pageSize);
}
}
// If the document has a specified CSS page-size, we rotate the page to
// reflect this. Changing the orientation is reflected by the result of
// FinishPrintPreview, so that the frontend can reflect this.
// The new document has not yet been reflowed, so we have to query the
// original document for any CSS page-size.
if (sizeAndOrientation.orientation) {
switch (sizeAndOrientation.orientation.value()) {
case StylePageSizeOrientation::Landscape:
if (pageSize.width < pageSize.height) {
// Paper is in portrait, CSS page size is landscape.
std::swap(pageSize.width, pageSize.height);
}
break;
case StylePageSizeOrientation::Portrait:
if (pageSize.width > pageSize.height) {
// Paper is in landscape, CSS page size is portrait.
std::swap(pageSize.width, pageSize.height);
}
break;
}
mMaybeCSSPageLandscape = Some(sizeAndOrientation.orientation.value() ==
StylePageSizeOrientation::Landscape);
aPO->mPresContext->SetPageSize(pageSize);
}
}
// Process the reflow event Initialize posted
presShell->FlushPendingNotifications(FlushType::Layout);
MOZ_TRY(UpdateSelectionAndShrinkPrintObject(aPO.get(), documentIsTopLevel));
#ifdef EXTENDED_DEBUG_PRINTING
if (MOZ_LOG_TEST(gPrintingLog, DUMP_LAYOUT_LEVEL)) {
nsAutoCString docStr;
nsAutoCString urlStr;
GetDocTitleAndURL(aPO, docStr, urlStr);
char filename[256];
sprintf(filename, "print_dump_%d.txt", gDumpFileNameCnt++);
// Dump all the frames and view to a a file
FILE* fd = fopen(filename, "w");
if (fd) {
nsIFrame* theRootFrame = aPO->mPresShell->GetRootFrame();
fprintf(fd, "Title: %s\n", docStr.get());
fprintf(fd, "URL: %s\n", urlStr.get());
fprintf(fd, "--------------- Frames ----------------\n");
// RefPtr<gfxContext> renderingContext =
// printData->mPrintDocDC->CreateRenderingContext();
RootFrameList(aPO->mPresContext, fd, 0);
// DumpFrames(fd, aPO->mPresContext, renderingContext, theRootFrame, 0);
fprintf(fd, "---------------------------------------\n\n");
fprintf(fd, "--------------- Views From Root Frame----------------\n");
nsView* v = theRootFrame->GetView();
if (v) {
v->List(fd);
} else {
printf("View is null!\n");
}
if (aPO->mDocShell) {
fprintf(fd, "--------------- All Views ----------------\n");
DumpViews(aPO->mDocShell, fd);
fprintf(fd, "---------------------------------------\n\n");
}
fclose(fd);
}
}
#endif
return NS_OK;
}
//-------------------------------------------------------
// Figure out how many documents and how many total pages we are printing
void nsPrintJob::CalcNumPrintablePages(int32_t& aNumPages) {
aNumPages = 0;
// Count the number of printable documents and printable pages
for (nsPrintObject* po : mPrintDocList) {
// Note: The po->mPresContext null-check below is necessary, because it's
// possible po->mPresContext might never have been set. (e.g., if
// PrintingIsEnabled() returns false, ReflowPrintObject bails before setting
// mPresContext)
if (po->mPresContext && po->mPresContext->IsRootPaginatedDocument()) {
nsPageSequenceFrame* seqFrame = po->mPresShell->GetPageSequenceFrame();
if (seqFrame) {
aNumPages += seqFrame->PrincipalChildList().GetLength();
}
}
}
}
//-----------------------------------------------------------------
//-- Done: Reflow Methods
//-----------------------------------------------------------------
//-----------------------------------------------------------------
//-- Section: Printing Methods
//-----------------------------------------------------------------
//-------------------------------------------------------
// Called for each DocShell that needs to be printed
bool nsPrintJob::PrintDocContent(const UniquePtr<nsPrintObject>& aPO,
nsresult& aStatus) {
NS_ASSERTION(aPO, "Pointer is null!");
aStatus = NS_OK;
if (!aPO->mHasBeenPrinted && aPO->PrintingIsEnabled()) {
aStatus = DoPrint(aPO);
return true;
}
// If |aPO->mHasBeenPrinted| is true,
// the kids frames are already processed in |PrintPage|.
// XXX This should be removed. Since bug 1552785 it has no longer been
// possible for us to have to print multiple subdocuments consecutively.
if (!aPO->mHasBeenPrinted && !aPO->mInvisible) {
for (const UniquePtr<nsPrintObject>& po : aPO->mKids) {
bool printed = PrintDocContent(po, aStatus);
if (printed || NS_FAILED(aStatus)) {
return true;
}
}
}
return false;
}
// A helper struct to aid with DeleteNonSelectedNodes.
struct MOZ_STACK_CLASS SelectionRangeState {
explicit SelectionRangeState(RefPtr<Selection> aSelection)
: mSelection(std::move(aSelection)) {
MOZ_ASSERT(mSelection);
MOZ_ASSERT(!mSelection->RangeCount());
}
// Selects all the nodes that are _not_ included in a given set of ranges.
MOZ_CAN_RUN_SCRIPT void SelectComplementOf(Span<const RefPtr<nsRange>>);
// Removes the selected ranges from the document.
MOZ_CAN_RUN_SCRIPT void RemoveSelectionFromDocument();
private:
struct Position {
nsINode* mNode;
uint32_t mOffset;
};
MOZ_CAN_RUN_SCRIPT void SelectRange(nsRange*);
MOZ_CAN_RUN_SCRIPT void SelectNodesExcept(const Position& aStart,
const Position& aEnd);
MOZ_CAN_RUN_SCRIPT void SelectNodesExceptInSubtree(const Position& aStart,
const Position& aEnd);
// A map from subtree root (document or shadow root) to the start position of
// the non-selected content (so far).
nsTHashMap<nsPtrHashKey<nsINode>, Position> mPositions;
// The selection we're adding the ranges to.
const RefPtr<Selection> mSelection;
};
void SelectionRangeState::SelectComplementOf(
Span<const RefPtr<nsRange>> aRanges) {
for (const auto& range : aRanges) {
auto start = Position{range->GetStartContainer(), range->StartOffset()};
auto end = Position{range->GetEndContainer(), range->EndOffset()};
SelectNodesExcept(start, end);
}
}
void SelectionRangeState::SelectRange(nsRange* aRange) {
if (aRange && !aRange->Collapsed()) {
mSelection->AddRangeAndSelectFramesAndNotifyListeners(*aRange,
IgnoreErrors());
}
}
void SelectionRangeState::SelectNodesExcept(const Position& aStart,
const Position& aEnd) {
SelectNodesExceptInSubtree(aStart, aEnd);
if (auto* shadow = ShadowRoot::FromNode(aStart.mNode->SubtreeRoot())) {
auto* host = shadow->Host();
SelectNodesExcept(Position{host, 0}, Position{host, host->GetChildCount()});
} else {
MOZ_ASSERT(aStart.mNode->IsInUncomposedDoc());
}
}
void SelectionRangeState::SelectNodesExceptInSubtree(const Position& aStart,
const Position& aEnd) {
static constexpr auto kEllipsis = u"\x2026"_ns;
nsINode* root = aStart.mNode->SubtreeRoot();
auto& start =
mPositions.WithEntryHandle(root, [&](auto&& entry) -> Position& {
return entry.OrInsertWith([&] { return Position{root, 0}; });
});
bool ellipsizedStart = false;