Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

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

1 files changed, 1088 insertions, 0 deletions

diff --git a/widget/nsPrintSettingsService.cpp b/widget/nsPrintSettingsService.cpp
new file mode 100644
index 0000000000..c33b05be0e
--- /dev/null
+++ b/widget/nsPrintSettingsService.cpp
@@ -0,0 +1,1088 @@
+/* -*- 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 "nsPrintSettingsService.h"
+
+#include "mozilla/embedding/PPrintingTypes.h"
+#include "mozilla/layout/RemotePrintJobChild.h"
+#include "mozilla/RefPtr.h"
+#include "nsCoord.h"
+#include "nsIPrinterList.h"
+#include "nsReadableUtils.h"
+#include "nsPrintSettingsImpl.h"
+#include "nsServiceManagerUtils.h"
+#include "nsSize.h"
+
+#include "nsArray.h"
+#include "nsXPCOM.h"
+#include "nsXULAppAPI.h"
+
+#include "nsIStringEnumerator.h"
+#include "stdlib.h"
+#include "mozilla/StaticPrefs_print.h"
+#include "mozilla/Preferences.h"
+#include "nsPrintfCString.h"
+
+using namespace mozilla;
+using namespace mozilla::embedding;
+
+typedef mozilla::layout::RemotePrintJobChild RemotePrintJobChild;
+
+NS_IMPL_ISUPPORTS(nsPrintSettingsService, nsIPrintSettingsService)
+
+// Pref Constants
+static const char kMarginTop[] = "print_margin_top";
+static const char kMarginLeft[] = "print_margin_left";
+static const char kMarginBottom[] = "print_margin_bottom";
+static const char kMarginRight[] = "print_margin_right";
+static const char kEdgeTop[] = "print_edge_top";
+static const char kEdgeLeft[] = "print_edge_left";
+static const char kEdgeBottom[] = "print_edge_bottom";
+static const char kEdgeRight[] = "print_edge_right";
+
+static const char kIgnoreUnwriteableMargins[] =
+    "print_ignore_unwriteable_margins";
+
+static const char kUnwriteableMarginTopTwips[] =
+    "print_unwriteable_margin_top_twips";
+static const char kUnwriteableMarginLeftTwips[] =
+    "print_unwriteable_margin_left_twips";
+static const char kUnwriteableMarginBottomTwips[] =
+    "print_unwriteable_margin_bottom_twips";
+static const char kUnwriteableMarginRightTwips[] =
+    "print_unwriteable_margin_right_twips";
+
+// These are legacy versions of the above UnwriteableMargin prefs. The new ones,
+// which are in twips, were introduced to more accurately record the values.
+static const char kUnwriteableMarginTop[] = "print_unwriteable_margin_top";
+static const char kUnwriteableMarginLeft[] = "print_unwriteable_margin_left";
+static const char kUnwriteableMarginBottom[] =
+    "print_unwriteable_margin_bottom";
+static const char kUnwriteableMarginRight[] = "print_unwriteable_margin_right";
+
+// Prefs for Print Options
+static const char kPrintHeaderStrLeft[] = "print_headerleft";
+static const char kPrintHeaderStrCenter[] = "print_headercenter";
+static const char kPrintHeaderStrRight[] = "print_headerright";
+static const char kPrintFooterStrLeft[] = "print_footerleft";
+static const char kPrintFooterStrCenter[] = "print_footercenter";
+static const char kPrintFooterStrRight[] = "print_footerright";
+
+// Additional Prefs
+static const char kPrintReversed[] = "print_reversed";
+static const char kPrintInColor[] = "print_in_color";
+static const char kPrintPaperId[] = "print_paper_id";
+static const char kPrintPaperSizeUnit[] = "print_paper_size_unit";
+static const char kPrintPaperWidth[] = "print_paper_width";
+static const char kPrintPaperHeight[] = "print_paper_height";
+static const char kPrintOrientation[] = "print_orientation";
+static const char kPrinterName[] = "print_printer";
+static const char kPrintToFile[] = "print_to_file";
+static const char kPrintToFileName[] = "print_to_filename";
+static const char kPrintPageDelay[] = "print_page_delay";
+static const char kPrintBGColors[] = "print_bgcolor";
+static const char kPrintBGImages[] = "print_bgimages";
+static const char kPrintShrinkToFit[] = "print_shrink_to_fit";
+static const char kPrintScaling[] = "print_scaling";
+static const char kPrintDuplex[] = "print_duplex";
+
+static const char kJustLeft[] = "left";
+static const char kJustCenter[] = "center";
+static const char kJustRight[] = "right";
+
+#define NS_PRINTER_LIST_CONTRACTID "@mozilla.org/gfx/printerlist;1"
+
+nsresult nsPrintSettingsService::Init() { return NS_OK; }
+
+NS_IMETHODIMP
+nsPrintSettingsService::SerializeToPrintData(nsIPrintSettings* aSettings,
+                                             PrintData* data) {
+  aSettings->GetPageRanges(data->pageRanges());
+
+  aSettings->GetEdgeTop(&data->edgeTop());
+  aSettings->GetEdgeLeft(&data->edgeLeft());
+  aSettings->GetEdgeBottom(&data->edgeBottom());
+  aSettings->GetEdgeRight(&data->edgeRight());
+
+  aSettings->GetMarginTop(&data->marginTop());
+  aSettings->GetMarginLeft(&data->marginLeft());
+  aSettings->GetMarginBottom(&data->marginBottom());
+  aSettings->GetMarginRight(&data->marginRight());
+  aSettings->GetUnwriteableMarginTop(&data->unwriteableMarginTop());
+  aSettings->GetUnwriteableMarginLeft(&data->unwriteableMarginLeft());
+  aSettings->GetUnwriteableMarginBottom(&data->unwriteableMarginBottom());
+  aSettings->GetUnwriteableMarginRight(&data->unwriteableMarginRight());
+
+  aSettings->GetScaling(&data->scaling());
+
+  data->printBGColors() = aSettings->GetPrintBGColors();
+  data->printBGImages() = aSettings->GetPrintBGImages();
+
+  data->ignoreUnwriteableMargins() = aSettings->GetIgnoreUnwriteableMargins();
+  data->honorPageRuleMargins() = aSettings->GetHonorPageRuleMargins();
+  data->usePageRuleSizeAsPaperSize() =
+      aSettings->GetUsePageRuleSizeAsPaperSize();
+  data->showMarginGuides() = aSettings->GetShowMarginGuides();
+  data->printSelectionOnly() = aSettings->GetPrintSelectionOnly();
+
+  aSettings->GetTitle(data->title());
+  aSettings->GetDocURL(data->docURL());
+
+  aSettings->GetHeaderStrLeft(data->headerStrLeft());
+  aSettings->GetHeaderStrCenter(data->headerStrCenter());
+  aSettings->GetHeaderStrRight(data->headerStrRight());
+
+  aSettings->GetFooterStrLeft(data->footerStrLeft());
+  aSettings->GetFooterStrCenter(data->footerStrCenter());
+  aSettings->GetFooterStrRight(data->footerStrRight());
+
+  aSettings->GetPrintSilent(&data->printSilent());
+  aSettings->GetShrinkToFit(&data->shrinkToFit());
+
+  aSettings->GetPaperId(data->paperId());
+  aSettings->GetPaperWidth(&data->paperWidth());
+  aSettings->GetPaperHeight(&data->paperHeight());
+  aSettings->GetPaperSizeUnit(&data->paperSizeUnit());
+
+  aSettings->GetPrintReversed(&data->printReversed());
+  aSettings->GetPrintInColor(&data->printInColor());
+  aSettings->GetOrientation(&data->orientation());
+
+  aSettings->GetNumCopies(&data->numCopies());
+  aSettings->GetNumPagesPerSheet(&data->numPagesPerSheet());
+
+  data->outputDestination() = aSettings->GetOutputDestination();
+
+  data->outputFormat() = aSettings->GetOutputFormat();
+  data->printPageDelay() = aSettings->GetPrintPageDelay();
+  data->resolution() = aSettings->GetResolution();
+  data->duplex() = aSettings->GetDuplex();
+
+  aSettings->GetIsInitializedFromPrinter(&data->isInitializedFromPrinter());
+  aSettings->GetIsInitializedFromPrefs(&data->isInitializedFromPrefs());
+
+  // Initialize the platform-specific values that don't
+  // default-initialize, so that we don't send uninitialized data over
+  // IPC (which leads to valgrind warnings, and, for bools, fatal
+  // assertions).
+  // data->driverName() default-initializes
+  // data->deviceName() default-initializes
+  // data->GTKPrintSettings() default-initializes
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPrintSettingsService::DeserializeToPrintSettings(const PrintData& data,
+                                                   nsIPrintSettings* settings) {
+  settings->SetPageRanges(data.pageRanges());
+
+  settings->SetEdgeTop(data.edgeTop());
+  settings->SetEdgeLeft(data.edgeLeft());
+  settings->SetEdgeBottom(data.edgeBottom());
+  settings->SetEdgeRight(data.edgeRight());
+
+  settings->SetMarginTop(data.marginTop());
+  settings->SetMarginLeft(data.marginLeft());
+  settings->SetMarginBottom(data.marginBottom());
+  settings->SetMarginRight(data.marginRight());
+  settings->SetUnwriteableMarginTop(data.unwriteableMarginTop());
+  settings->SetUnwriteableMarginLeft(data.unwriteableMarginLeft());
+  settings->SetUnwriteableMarginBottom(data.unwriteableMarginBottom());
+  settings->SetUnwriteableMarginRight(data.unwriteableMarginRight());
+
+  settings->SetScaling(data.scaling());
+
+  settings->SetPrintBGColors(data.printBGColors());
+  settings->SetPrintBGImages(data.printBGImages());
+  settings->SetHonorPageRuleMargins(data.honorPageRuleMargins());
+  settings->SetUsePageRuleSizeAsPaperSize(data.usePageRuleSizeAsPaperSize());
+  settings->SetIgnoreUnwriteableMargins(data.ignoreUnwriteableMargins());
+  settings->SetShowMarginGuides(data.showMarginGuides());
+  settings->SetPrintSelectionOnly(data.printSelectionOnly());
+
+  settings->SetTitle(data.title());
+  settings->SetDocURL(data.docURL());
+
+  // Header strings...
+  settings->SetHeaderStrLeft(data.headerStrLeft());
+  settings->SetHeaderStrCenter(data.headerStrCenter());
+  settings->SetHeaderStrRight(data.headerStrRight());
+
+  // Footer strings...
+  settings->SetFooterStrLeft(data.footerStrLeft());
+  settings->SetFooterStrCenter(data.footerStrCenter());
+  settings->SetFooterStrRight(data.footerStrRight());
+
+  settings->SetPrintSilent(data.printSilent());
+  settings->SetShrinkToFit(data.shrinkToFit());
+
+  settings->SetPaperId(data.paperId());
+
+  settings->SetPaperWidth(data.paperWidth());
+  settings->SetPaperHeight(data.paperHeight());
+  settings->SetPaperSizeUnit(data.paperSizeUnit());
+
+  settings->SetPrintReversed(data.printReversed());
+  settings->SetPrintInColor(data.printInColor());
+  settings->SetOrientation(data.orientation());
+
+  settings->SetNumCopies(data.numCopies());
+  settings->SetNumPagesPerSheet(data.numPagesPerSheet());
+
+  settings->SetOutputDestination(
+      nsIPrintSettings::OutputDestinationType(data.outputDestination()));
+  // Output stream intentionally unset, child processes shouldn't care about it.
+
+  settings->SetOutputFormat(data.outputFormat());
+  settings->SetPrintPageDelay(data.printPageDelay());
+  settings->SetResolution(data.resolution());
+  settings->SetDuplex(data.duplex());
+  settings->SetIsInitializedFromPrinter(data.isInitializedFromPrinter());
+  settings->SetIsInitializedFromPrefs(data.isInitializedFromPrefs());
+
+  return NS_OK;
+}
+
+/** ---------------------------------------------------
+ *  Helper function - Creates the "prefix" for the pref
+ *  It is either "print."
+ *  or "print.printer_<print name>."
+ */
+const char* nsPrintSettingsService::GetPrefName(const char* aPrefName,
+                                                const nsAString& aPrinterName) {
+  if (!aPrefName || !*aPrefName) {
+    NS_ERROR("Must have a valid pref name!");
+    return aPrefName;
+  }
+
+  mPrefName.AssignLiteral("print.");
+
+  if (aPrinterName.Length()) {
+    mPrefName.AppendLiteral("printer_");
+    AppendUTF16toUTF8(aPrinterName, mPrefName);
+    mPrefName.Append('.');
+  }
+  mPrefName += aPrefName;
+
+  return mPrefName.get();
+}
+
+/**
+ *  This will either read in the generic prefs (not specific to a printer)
+ *  or read the prefs in using the printer name to qualify.
+ *  It is either "print.attr_name" or "print.printer_HPLasr5.attr_name"
+ */
+nsresult nsPrintSettingsService::ReadPrefs(nsIPrintSettings* aPS,
+                                           const nsAString& aPrinterName,
+                                           uint32_t aFlags) {
+  NS_ENSURE_ARG_POINTER(aPS);
+
+  bool noValidPrefsFound = true;
+  bool b;
+  nsAutoString str;
+  int32_t iVal;
+  double dbl;
+
+#define GETBOOLPREF(_prefname, _retval) \
+  NS_SUCCEEDED(                         \
+      Preferences::GetBool(GetPrefName(_prefname, aPrinterName), _retval))
+
+#define GETSTRPREF(_prefname, _retval) \
+  NS_SUCCEEDED(                        \
+      Preferences::GetString(GetPrefName(_prefname, aPrinterName), _retval))
+
+#define GETINTPREF(_prefname, _retval) \
+  NS_SUCCEEDED(                        \
+      Preferences::GetInt(GetPrefName(_prefname, aPrinterName), _retval))
+
+#define GETDBLPREF(_prefname, _retval) \
+  NS_SUCCEEDED(ReadPrefDouble(GetPrefName(_prefname, aPrinterName), _retval))
+
+  bool gotPaperSizeFromPrefs = false;
+  int16_t paperSizeUnit;
+  double paperWidth, paperHeight;
+
+  // Paper size prefs are read as a group
+  if (aFlags & nsIPrintSettings::kInitSavePaperSize) {
+    gotPaperSizeFromPrefs = GETINTPREF(kPrintPaperSizeUnit, &iVal) &&
+                            GETDBLPREF(kPrintPaperWidth, paperWidth) &&
+                            GETDBLPREF(kPrintPaperHeight, paperHeight) &&
+                            GETSTRPREF(kPrintPaperId, str);
+    paperSizeUnit = (int16_t)iVal;
+
+    if (gotPaperSizeFromPrefs &&
+        paperSizeUnit != nsIPrintSettings::kPaperSizeInches &&
+        paperSizeUnit != nsIPrintSettings::kPaperSizeMillimeters) {
+      gotPaperSizeFromPrefs = false;
+    }
+
+    if (gotPaperSizeFromPrefs) {
+      // Bug 315687: Sanity check paper size to avoid paper size values in
+      // mm when the size unit flag is inches. The value 100 is arbitrary
+      // and can be changed.
+      gotPaperSizeFromPrefs =
+          (paperSizeUnit != nsIPrintSettings::kPaperSizeInches) ||
+          (paperWidth < 100.0) || (paperHeight < 100.0);
+    }
+
+    if (gotPaperSizeFromPrefs) {
+      aPS->SetPaperSizeUnit(paperSizeUnit);
+      aPS->SetPaperWidth(paperWidth);
+      aPS->SetPaperHeight(paperHeight);
+      aPS->SetPaperId(str);
+      noValidPrefsFound = false;
+    }
+  }
+
+  nsIntSize pageSizeInTwips;  // to sanity check margins
+  if (!gotPaperSizeFromPrefs) {
+    aPS->GetPaperSizeUnit(&paperSizeUnit);
+    aPS->GetPaperWidth(&paperWidth);
+    aPS->GetPaperHeight(&paperHeight);
+  }
+  if (paperSizeUnit == nsIPrintSettings::kPaperSizeMillimeters) {
+    pageSizeInTwips = nsIntSize((int)NS_MILLIMETERS_TO_TWIPS(paperWidth),
+                                (int)NS_MILLIMETERS_TO_TWIPS(paperHeight));
+  } else {
+    pageSizeInTwips = nsIntSize((int)NS_INCHES_TO_TWIPS(paperWidth),
+                                (int)NS_INCHES_TO_TWIPS(paperHeight));
+  }
+
+  auto MarginIsOK = [&pageSizeInTwips](const nsIntMargin& aMargin) {
+    return aMargin.top >= 0 && aMargin.right >= 0 && aMargin.bottom >= 0 &&
+           aMargin.left >= 0 && aMargin.LeftRight() < pageSizeInTwips.width &&
+           aMargin.TopBottom() < pageSizeInTwips.height;
+  };
+
+  if (aFlags & nsIPrintSettings::kInitSaveUnwriteableMargins) {
+    nsIntMargin margin;
+    bool allPrefsRead =
+        GETINTPREF(kUnwriteableMarginTopTwips, &margin.top) &&
+        GETINTPREF(kUnwriteableMarginRightTwips, &margin.right) &&
+        GETINTPREF(kUnwriteableMarginBottomTwips, &margin.bottom) &&
+        GETINTPREF(kUnwriteableMarginLeftTwips, &margin.left);
+    if (!allPrefsRead) {
+      // We failed to read the new unwritable margin twips prefs. Try to read
+      // the old ones in case they exist.
+      allPrefsRead =
+          ReadInchesIntToTwipsPref(
+              GetPrefName(kUnwriteableMarginTop, aPrinterName), margin.top) &&
+          ReadInchesIntToTwipsPref(
+              GetPrefName(kUnwriteableMarginLeft, aPrinterName), margin.left) &&
+          ReadInchesIntToTwipsPref(
+              GetPrefName(kUnwriteableMarginBottom, aPrinterName),
+              margin.bottom) &&
+          ReadInchesIntToTwipsPref(
+              GetPrefName(kUnwriteableMarginRight, aPrinterName), margin.right);
+    }
+    // SetUnwriteableMarginInTwips does its own validation and drops negative
+    // values individually.  We still want to block overly large values though,
+    // so we do that part of MarginIsOK manually.
+    if (allPrefsRead && margin.LeftRight() < pageSizeInTwips.width &&
+        margin.TopBottom() < pageSizeInTwips.height) {
+      aPS->SetUnwriteableMarginInTwips(margin);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveMargins) {
+    int32_t halfInch = NS_INCHES_TO_INT_TWIPS(0.5);
+    nsIntMargin margin(halfInch, halfInch, halfInch, halfInch);
+    bool prefRead = ReadInchesToTwipsPref(GetPrefName(kMarginTop, aPrinterName),
+                                          margin.top);
+    prefRead = ReadInchesToTwipsPref(GetPrefName(kMarginLeft, aPrinterName),
+                                     margin.left) ||
+               prefRead;
+    prefRead = ReadInchesToTwipsPref(GetPrefName(kMarginBottom, aPrinterName),
+                                     margin.bottom) ||
+               prefRead;
+
+    prefRead = ReadInchesToTwipsPref(GetPrefName(kMarginRight, aPrinterName),
+                                     margin.right) ||
+               prefRead;
+    if (prefRead && MarginIsOK(margin)) {
+      aPS->SetMarginInTwips(margin);
+      noValidPrefsFound = false;
+
+      prefRead = GETBOOLPREF(kIgnoreUnwriteableMargins, &b);
+      if (prefRead) {
+        aPS->SetIgnoreUnwriteableMargins(b);
+      }
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveEdges) {
+    nsIntMargin margin(0, 0, 0, 0);
+    bool prefRead = ReadInchesIntToTwipsPref(
+        GetPrefName(kEdgeTop, aPrinterName), margin.top);
+    prefRead = ReadInchesIntToTwipsPref(GetPrefName(kEdgeLeft, aPrinterName),
+                                        margin.left) ||
+               prefRead;
+
+    prefRead = ReadInchesIntToTwipsPref(GetPrefName(kEdgeBottom, aPrinterName),
+                                        margin.bottom) ||
+               prefRead;
+
+    prefRead = ReadInchesIntToTwipsPref(GetPrefName(kEdgeRight, aPrinterName),
+                                        margin.right) ||
+               prefRead;
+    ;
+    if (prefRead && MarginIsOK(margin)) {
+      aPS->SetEdgeInTwips(margin);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveHeaderLeft) {
+    if (GETSTRPREF(kPrintHeaderStrLeft, str)) {
+      aPS->SetHeaderStrLeft(str);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveHeaderCenter) {
+    if (GETSTRPREF(kPrintHeaderStrCenter, str)) {
+      aPS->SetHeaderStrCenter(str);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveHeaderRight) {
+    if (GETSTRPREF(kPrintHeaderStrRight, str)) {
+      aPS->SetHeaderStrRight(str);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveFooterLeft) {
+    if (GETSTRPREF(kPrintFooterStrLeft, str)) {
+      aPS->SetFooterStrLeft(str);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveFooterCenter) {
+    if (GETSTRPREF(kPrintFooterStrCenter, str)) {
+      aPS->SetFooterStrCenter(str);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveFooterRight) {
+    if (GETSTRPREF(kPrintFooterStrRight, str)) {
+      aPS->SetFooterStrRight(str);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveBGColors) {
+    if (GETBOOLPREF(kPrintBGColors, &b)) {
+      aPS->SetPrintBGColors(b);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveBGImages) {
+    if (GETBOOLPREF(kPrintBGImages, &b)) {
+      aPS->SetPrintBGImages(b);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveReversed) {
+    if (GETBOOLPREF(kPrintReversed, &b)) {
+      aPS->SetPrintReversed(b);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveInColor) {
+    if (GETBOOLPREF(kPrintInColor, &b)) {
+      aPS->SetPrintInColor(b);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveOrientation) {
+    if (GETINTPREF(kPrintOrientation, &iVal) &&
+        (iVal == nsIPrintSettings::kPortraitOrientation ||
+         iVal == nsIPrintSettings::kLandscapeOrientation)) {
+      aPS->SetOrientation(iVal);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSavePrintToFile) {
+    if (GETBOOLPREF(kPrintToFile, &b)) {
+      aPS->SetOutputDestination(
+          b ? nsIPrintSettings::kOutputDestinationFile
+            : nsIPrintSettings::kOutputDestinationPrinter);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveToFileName) {
+    if (GETSTRPREF(kPrintToFileName, str)) {
+      if (StringEndsWith(str, u".ps"_ns)) {
+        // We only support PDF since bug 1425188 landed.  Users may still have
+        // prefs with .ps filenames if they last saved a file as Postscript
+        // though, so we fix that up here.  (The pref values will be
+        // overwritten the next time they save to file as a PDF.)
+        str.Truncate(str.Length() - 2);
+        str.AppendLiteral("pdf");
+      }
+      aPS->SetToFileName(str);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSavePageDelay) {
+    // milliseconds
+    if (GETINTPREF(kPrintPageDelay, &iVal) && iVal >= 0 && iVal <= 1000) {
+      aPS->SetPrintPageDelay(iVal);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveShrinkToFit) {
+    if (GETBOOLPREF(kPrintShrinkToFit, &b)) {
+      aPS->SetShrinkToFit(b);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveScaling) {
+    // The limits imposed here are fairly arbitrary and mainly intended to
+    // purge bad values which tend to be negative and/or very large.  If we
+    // get complaints from users that settings outside these values "aren't
+    // saved" then we can consider increasing them.
+    if (GETDBLPREF(kPrintScaling, dbl) && dbl >= 0.05 && dbl <= 20) {
+      aPS->SetScaling(dbl);
+      noValidPrefsFound = false;
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveDuplex) {
+    if (GETINTPREF(kPrintDuplex, &iVal)) {
+      aPS->SetDuplex(iVal);
+      noValidPrefsFound = false;
+    }
+  }
+
+  // Not Reading In:
+  //   Number of Copies
+  //   Print Resolution
+
+  return noValidPrefsFound ? NS_ERROR_NOT_AVAILABLE : NS_OK;
+}
+
+nsresult nsPrintSettingsService::WritePrefs(nsIPrintSettings* aPS,
+                                            const nsAString& aPrinterName,
+                                            uint32_t aFlags) {
+  NS_ENSURE_ARG_POINTER(aPS);
+
+  if (aFlags & nsIPrintSettings::kInitSaveMargins) {
+    nsIntMargin margin = aPS->GetMarginInTwips();
+    WriteInchesFromTwipsPref(GetPrefName(kMarginTop, aPrinterName), margin.top);
+    WriteInchesFromTwipsPref(GetPrefName(kMarginLeft, aPrinterName),
+                             margin.left);
+    WriteInchesFromTwipsPref(GetPrefName(kMarginBottom, aPrinterName),
+                             margin.bottom);
+    WriteInchesFromTwipsPref(GetPrefName(kMarginRight, aPrinterName),
+                             margin.right);
+    Preferences::SetBool(GetPrefName(kIgnoreUnwriteableMargins, aPrinterName),
+                         aPS->GetIgnoreUnwriteableMargins());
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveEdges) {
+    nsIntMargin edge = aPS->GetEdgeInTwips();
+    WriteInchesIntFromTwipsPref(GetPrefName(kEdgeTop, aPrinterName), edge.top);
+    WriteInchesIntFromTwipsPref(GetPrefName(kEdgeLeft, aPrinterName),
+                                edge.left);
+    WriteInchesIntFromTwipsPref(GetPrefName(kEdgeBottom, aPrinterName),
+                                edge.bottom);
+    WriteInchesIntFromTwipsPref(GetPrefName(kEdgeRight, aPrinterName),
+                                edge.right);
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveUnwriteableMargins) {
+    nsIntMargin unwriteableMargin = aPS->GetUnwriteableMarginInTwips();
+    Preferences::SetInt(GetPrefName(kUnwriteableMarginTopTwips, aPrinterName),
+                        unwriteableMargin.top);
+    Preferences::SetInt(GetPrefName(kUnwriteableMarginLeftTwips, aPrinterName),
+                        unwriteableMargin.left);
+    Preferences::SetInt(
+        GetPrefName(kUnwriteableMarginBottomTwips, aPrinterName),
+        unwriteableMargin.bottom);
+    Preferences::SetInt(GetPrefName(kUnwriteableMarginRightTwips, aPrinterName),
+                        unwriteableMargin.right);
+
+    // Remove the old unwriteableMargin prefs.
+    Preferences::ClearUser(GetPrefName(kUnwriteableMarginTop, aPrinterName));
+    Preferences::ClearUser(GetPrefName(kUnwriteableMarginRight, aPrinterName));
+    Preferences::ClearUser(GetPrefName(kUnwriteableMarginBottom, aPrinterName));
+    Preferences::ClearUser(GetPrefName(kUnwriteableMarginLeft, aPrinterName));
+  }
+
+  // Paper size prefs are saved as a group
+  if (aFlags & nsIPrintSettings::kInitSavePaperSize) {
+    int16_t sizeUnit;
+    double width, height;
+    nsString name;
+
+    if (NS_SUCCEEDED(aPS->GetPaperSizeUnit(&sizeUnit)) &&
+        NS_SUCCEEDED(aPS->GetPaperWidth(&width)) &&
+        NS_SUCCEEDED(aPS->GetPaperHeight(&height)) &&
+        NS_SUCCEEDED(aPS->GetPaperId(name))) {
+      Preferences::SetInt(GetPrefName(kPrintPaperSizeUnit, aPrinterName),
+                          int32_t(sizeUnit));
+      WritePrefDouble(GetPrefName(kPrintPaperWidth, aPrinterName), width);
+      WritePrefDouble(GetPrefName(kPrintPaperHeight, aPrinterName), height);
+      Preferences::SetString(GetPrefName(kPrintPaperId, aPrinterName), name);
+    }
+  }
+
+  bool b;
+  nsString uStr;
+  int32_t iVal;
+  double dbl;
+
+  if (aFlags & nsIPrintSettings::kInitSaveHeaderLeft) {
+    if (NS_SUCCEEDED(aPS->GetHeaderStrLeft(uStr))) {
+      Preferences::SetString(GetPrefName(kPrintHeaderStrLeft, aPrinterName),
+                             uStr);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveHeaderCenter) {
+    if (NS_SUCCEEDED(aPS->GetHeaderStrCenter(uStr))) {
+      Preferences::SetString(GetPrefName(kPrintHeaderStrCenter, aPrinterName),
+                             uStr);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveHeaderRight) {
+    if (NS_SUCCEEDED(aPS->GetHeaderStrRight(uStr))) {
+      Preferences::SetString(GetPrefName(kPrintHeaderStrRight, aPrinterName),
+                             uStr);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveFooterLeft) {
+    if (NS_SUCCEEDED(aPS->GetFooterStrLeft(uStr))) {
+      Preferences::SetString(GetPrefName(kPrintFooterStrLeft, aPrinterName),
+                             uStr);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveFooterCenter) {
+    if (NS_SUCCEEDED(aPS->GetFooterStrCenter(uStr))) {
+      Preferences::SetString(GetPrefName(kPrintFooterStrCenter, aPrinterName),
+                             uStr);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveFooterRight) {
+    if (NS_SUCCEEDED(aPS->GetFooterStrRight(uStr))) {
+      Preferences::SetString(GetPrefName(kPrintFooterStrRight, aPrinterName),
+                             uStr);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveBGColors) {
+    b = aPS->GetPrintBGColors();
+    Preferences::SetBool(GetPrefName(kPrintBGColors, aPrinterName), b);
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveBGImages) {
+    b = aPS->GetPrintBGImages();
+    Preferences::SetBool(GetPrefName(kPrintBGImages, aPrinterName), b);
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveReversed) {
+    if (NS_SUCCEEDED(aPS->GetPrintReversed(&b))) {
+      Preferences::SetBool(GetPrefName(kPrintReversed, aPrinterName), b);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveInColor) {
+    if (NS_SUCCEEDED(aPS->GetPrintInColor(&b))) {
+      Preferences::SetBool(GetPrefName(kPrintInColor, aPrinterName), b);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveOrientation) {
+    if (NS_SUCCEEDED(aPS->GetOrientation(&iVal))) {
+      Preferences::SetInt(GetPrefName(kPrintOrientation, aPrinterName), iVal);
+    }
+  }
+
+  // Only the general version of this pref is saved
+  if ((aFlags & nsIPrintSettings::kInitSavePrinterName) &&
+      aPrinterName.IsEmpty()) {
+    if (NS_SUCCEEDED(aPS->GetPrinterName(uStr))) {
+      Preferences::SetString(kPrinterName, uStr);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSavePrintToFile) {
+    Preferences::SetBool(GetPrefName(kPrintToFile, aPrinterName),
+                         aPS->GetOutputDestination() ==
+                             nsIPrintSettings::kOutputDestinationFile);
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveToFileName) {
+    if (NS_SUCCEEDED(aPS->GetToFileName(uStr))) {
+      Preferences::SetString(GetPrefName(kPrintToFileName, aPrinterName), uStr);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSavePageDelay) {
+    if (NS_SUCCEEDED(aPS->GetPrintPageDelay(&iVal))) {
+      Preferences::SetInt(GetPrefName(kPrintPageDelay, aPrinterName), iVal);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveShrinkToFit) {
+    if (NS_SUCCEEDED(aPS->GetShrinkToFit(&b))) {
+      Preferences::SetBool(GetPrefName(kPrintShrinkToFit, aPrinterName), b);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveScaling) {
+    if (NS_SUCCEEDED(aPS->GetScaling(&dbl))) {
+      WritePrefDouble(GetPrefName(kPrintScaling, aPrinterName), dbl);
+    }
+  }
+
+  if (aFlags & nsIPrintSettings::kInitSaveDuplex) {
+    if (NS_SUCCEEDED(aPS->GetDuplex(&iVal))) {
+      Preferences::SetInt(GetPrefName(kPrintDuplex, aPrinterName), iVal);
+    }
+  }
+
+  // Not Writing Out:
+  //   Number of Copies
+  //   Print Resolution
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPrintSettingsService::GetDefaultPrintSettingsForPrinting(
+    nsIPrintSettings** aPrintSettings) {
+  nsresult rv = CreateNewPrintSettings(aPrintSettings);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsIPrintSettings* settings = *aPrintSettings;
+
+  // For security reasons, we don't pass the printer name to content processes.
+  // Once bug 1776169 is fixed, we can just assert that this is the parent
+  // process.
+  bool usePrinterName = XRE_IsParentProcess();
+
+  if (usePrinterName) {
+    nsAutoString printerName;
+    settings->GetPrinterName(printerName);
+    if (printerName.IsEmpty()) {
+      GetLastUsedPrinterName(printerName);
+      settings->SetPrinterName(printerName);
+    }
+    InitPrintSettingsFromPrinter(printerName, settings);
+  }
+
+  InitPrintSettingsFromPrefs(settings, usePrinterName,
+                             nsIPrintSettings::kInitSaveAll);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPrintSettingsService::CreateNewPrintSettings(
+    nsIPrintSettings** aNewPrintSettings) {
+  return _CreatePrintSettings(aNewPrintSettings);
+}
+
+NS_IMETHODIMP
+nsPrintSettingsService::GetLastUsedPrinterName(
+    nsAString& aLastUsedPrinterName) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+
+  aLastUsedPrinterName.Truncate();
+  Preferences::GetString(kPrinterName, aLastUsedPrinterName);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPrintSettingsService::InitPrintSettingsFromPrinter(
+    const nsAString& aPrinterName, nsIPrintSettings* aPrintSettings) {
+  // Don't get print settings from the printer in the child when printing via
+  // parent, these will be retrieved in the parent later in the print process.
+  if (XRE_IsContentProcess()) {
+    return NS_OK;
+  }
+
+  NS_ENSURE_ARG_POINTER(aPrintSettings);
+
+#ifdef DEBUG
+  nsString printerName;
+  aPrintSettings->GetPrinterName(printerName);
+  if (!printerName.Equals(aPrinterName)) {
+    NS_WARNING("Printer names should match!");
+  }
+#endif
+
+  bool isInitialized;
+  aPrintSettings->GetIsInitializedFromPrinter(&isInitialized);
+  if (isInitialized) return NS_OK;
+
+  nsresult rv;
+  nsCOMPtr<nsIPrinterList> printerList =
+      do_GetService(NS_PRINTER_LIST_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = printerList->InitPrintSettingsFromPrinter(aPrinterName, aPrintSettings);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  aPrintSettings->SetIsInitializedFromPrinter(true);
+  return rv;
+}
+
+/** ---------------------------------------------------
+ *  Helper function - Returns either the name or sets the length to zero
+ */
+static nsresult GetAdjustedPrinterName(nsIPrintSettings* aPS, bool aUsePNP,
+                                       nsAString& aPrinterName) {
+  NS_ENSURE_ARG_POINTER(aPS);
+
+  aPrinterName.Truncate();
+  if (!aUsePNP) return NS_OK;
+
+  // Get the Printer Name from the PrintSettings
+  // to use as a prefix for Pref Names
+  nsresult rv = aPS->GetPrinterName(aPrinterName);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Convert any whitespaces, carriage returns or newlines to _
+  // The below algorithm is supposedly faster than using iterators
+  constexpr auto replSubstr = u"_"_ns;
+  const char* replaceStr = " \n\r";
+
+  int32_t x;
+  for (x = 0; x < (int32_t)strlen(replaceStr); x++) {
+    char16_t uChar = replaceStr[x];
+
+    int32_t i = 0;
+    while ((i = aPrinterName.FindChar(uChar, i)) != kNotFound) {
+      aPrinterName.Replace(i, 1, replSubstr);
+      i++;
+    }
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPrintSettingsService::InitPrintSettingsFromPrefs(nsIPrintSettings* aPS,
+                                                   bool aUsePNP,
+                                                   uint32_t aFlags) {
+  NS_ENSURE_ARG_POINTER(aPS);
+
+  bool isInitialized;
+  aPS->GetIsInitializedFromPrefs(&isInitialized);
+
+  if (isInitialized) {
+    return NS_OK;
+  }
+
+  auto globalPrintSettings = aFlags;
+#ifndef MOZ_WIDGET_ANDROID
+  globalPrintSettings &= nsIPrintSettings::kGlobalSettings;
+#endif
+
+  nsAutoString prtName;
+  // read any non printer specific prefs
+  // with empty printer name
+  nsresult rv = ReadPrefs(aPS, prtName, globalPrintSettings);
+  if (NS_FAILED(rv) && rv != NS_ERROR_NOT_AVAILABLE) {
+    NS_WARNING("ReadPrefs failed");
+  }
+
+  // Get the Printer Name from the PrintSettings to use as a prefix for Pref
+  // Names
+  rv = GetAdjustedPrinterName(aPS, aUsePNP, prtName);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (prtName.IsEmpty()) {
+    NS_WARNING("Caller should supply a printer name.");
+    return NS_OK;
+  }
+
+  // Now read any printer specific prefs
+  rv = ReadPrefs(aPS, prtName, aFlags);
+  if (NS_SUCCEEDED(rv)) {
+    aPS->SetIsInitializedFromPrefs(true);
+  }
+
+  return NS_OK;
+}
+
+/**
+ *  Save all of the printer settings; if we can find a printer name, save
+ *  printer-specific preferences. Otherwise, save generic ones.
+ */
+nsresult nsPrintSettingsService::MaybeSavePrintSettingsToPrefs(
+    nsIPrintSettings* aPS, uint32_t aFlags) {
+  NS_ENSURE_ARG_POINTER(aPS);
+  MOZ_DIAGNOSTIC_ASSERT(XRE_GetProcessType() == GeckoProcessType_Default);
+  MOZ_ASSERT(!(aFlags & nsIPrintSettings::kInitSavePrinterName),
+             "Use SaveLastUsedPrintNameToPrefs");
+
+  if (!Preferences::GetBool("print.save_print_settings", false)) {
+    return NS_OK;
+  }
+
+  // Get the printer name from the PrinterSettings for an optional prefix.
+  nsAutoString prtName;
+  nsresult rv = GetAdjustedPrinterName(aPS, true, prtName);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+#ifndef MOZ_WIDGET_ANDROID
+  // On most platforms we should always use a prefix when saving print settings
+  // to prefs.  Saving without a prefix risks breaking printing for users
+  // without a good way for us to fix things for them (unprefixed prefs act as
+  // defaults and can result in values being inappropriately propagated to
+  // prefixed prefs).
+  if (prtName.IsEmpty()) {
+    MOZ_DIAGNOSTIC_ASSERT(false, "Print settings must be saved with a prefix");
+    return NS_ERROR_FAILURE;
+  }
+#endif
+
+  return WritePrefs(aPS, prtName, aFlags);
+}
+
+nsresult nsPrintSettingsService::MaybeSaveLastUsedPrinterNameToPrefs(
+    const nsAString& aPrinterName) {
+  MOZ_DIAGNOSTIC_ASSERT(XRE_GetProcessType() == GeckoProcessType_Default);
+
+  if (!Preferences::GetBool("print.save_print_settings", false)) {
+    return NS_OK;
+  }
+
+  if (!aPrinterName.IsEmpty()) {
+    Preferences::SetString(kPrinterName, aPrinterName);
+  }
+  return NS_OK;
+}
+
+//-----------------------------------------------------
+//-- Protected Methods --------------------------------
+//-----------------------------------------------------
+nsresult nsPrintSettingsService::ReadPrefDouble(const char* aPrefId,
+                                                double& aVal) {
+  NS_ENSURE_ARG_POINTER(aPrefId);
+
+  nsAutoCString str;
+  nsresult rv = Preferences::GetCString(aPrefId, str);
+  if (NS_FAILED(rv) || str.IsEmpty()) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  double value = str.ToDouble(&rv);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  aVal = value;
+  return NS_OK;
+}
+
+nsresult nsPrintSettingsService::WritePrefDouble(const char* aPrefId,
+                                                 double aVal) {
+  NS_ENSURE_ARG_POINTER(aPrefId);
+
+  nsAutoCString str;
+  str.AppendFloat(aVal);
+  return Preferences::SetCString(aPrefId, str);
+}
+
+bool nsPrintSettingsService::ReadInchesToTwipsPref(const char* aPrefId,
+                                                   int32_t& aTwips) {
+  nsAutoString str;
+  nsresult rv = Preferences::GetString(aPrefId, str);
+  if (NS_FAILED(rv) || str.IsEmpty()) {
+    return false;
+  }
+
+  float inches = str.ToFloat(&rv);
+  if (NS_FAILED(rv)) {
+    return false;
+  }
+
+  aTwips = NS_INCHES_TO_INT_TWIPS(inches);
+  return true;
+}
+
+void nsPrintSettingsService::WriteInchesFromTwipsPref(const char* aPrefId,
+                                                      int32_t aTwips) {
+  double inches = NS_TWIPS_TO_INCHES(aTwips);
+  nsAutoCString inchesStr;
+  inchesStr.AppendFloat(inches);
+
+  Preferences::SetCString(aPrefId, inchesStr);
+}
+
+bool nsPrintSettingsService::ReadInchesIntToTwipsPref(const char* aPrefId,
+                                                      int32_t& aTwips) {
+  int32_t value;
+  nsresult rv = Preferences::GetInt(aPrefId, &value);
+  if (NS_FAILED(rv)) {
+    return false;
+  }
+
+  aTwips = NS_INCHES_TO_INT_TWIPS(float(value) / 100.0f);
+  return true;
+}
+
+void nsPrintSettingsService::WriteInchesIntFromTwipsPref(const char* aPrefId,
+                                                         int32_t aTwips) {
+  Preferences::SetInt(aPrefId,
+                      int32_t(NS_TWIPS_TO_INCHES(aTwips) * 100.0f + 0.5f));
+}
+
+void nsPrintSettingsService::ReadJustification(const char* aPrefId,
+                                               int16_t& aJust,
+                                               int16_t aInitValue) {
+  aJust = aInitValue;
+  nsAutoString justStr;
+  if (NS_SUCCEEDED(Preferences::GetString(aPrefId, justStr))) {
+    if (justStr.EqualsASCII(kJustRight)) {
+      aJust = nsIPrintSettings::kJustRight;
+    } else if (justStr.EqualsASCII(kJustCenter)) {
+      aJust = nsIPrintSettings::kJustCenter;
+    } else {
+      aJust = nsIPrintSettings::kJustLeft;
+    }
+  }
+}
+
+//---------------------------------------------------
+void nsPrintSettingsService::WriteJustification(const char* aPrefId,
+                                                int16_t aJust) {
+  switch (aJust) {
+    case nsIPrintSettings::kJustLeft:
+      Preferences::SetCString(aPrefId, kJustLeft);
+      break;
+
+    case nsIPrintSettings::kJustCenter:
+      Preferences::SetCString(aPrefId, kJustCenter);
+      break;
+
+    case nsIPrintSettings::kJustRight:
+      Preferences::SetCString(aPrefId, kJustRight);
+      break;
+  }  // switch
+}