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, 422 insertions, 0 deletions

diff --git a/widget/gtk/nsDeviceContextSpecG.cpp b/widget/gtk/nsDeviceContextSpecG.cpp
new file mode 100644
index 0000000000..3dfa816408
--- /dev/null
+++ b/widget/gtk/nsDeviceContextSpecG.cpp
@@ -0,0 +1,422 @@
+/* -*- 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 "nsDeviceContextSpecG.h"
+
+#include "mozilla/gfx/PrintPromise.h"
+#include "mozilla/gfx/PrintTargetPDF.h"
+#include "mozilla/Logging.h"
+#include "mozilla/Services.h"
+#include "mozilla/GUniquePtr.h"
+#include "mozilla/WidgetUtilsGtk.h"
+
+#include "prenv.h" /* for PR_GetEnv */
+
+#include "nsComponentManagerUtils.h"
+#include "nsIObserverService.h"
+#include "nsPrintfCString.h"
+#include "nsQueryObject.h"
+#include "nsReadableUtils.h"
+#include "nsThreadUtils.h"
+
+#include "nsCUPSShim.h"
+#include "nsPrinterCUPS.h"
+
+#include "nsPrintSettingsGTK.h"
+
+#include "nsIFileStreams.h"
+#include "nsIFile.h"
+#include "nsTArray.h"
+#include "nsThreadUtils.h"
+
+#include "mozilla/Preferences.h"
+#include "mozilla/StaticPrefs_print.h"
+
+#include <dlfcn.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+// To check if we need to use flatpak portal for printing
+#include "nsIGIOService.h"
+
+using namespace mozilla;
+
+using mozilla::gfx::IntSize;
+using mozilla::gfx::PrintEndDocumentPromise;
+using mozilla::gfx::PrintTarget;
+using mozilla::gfx::PrintTargetPDF;
+
+nsDeviceContextSpecGTK::nsDeviceContextSpecGTK()
+    : mGtkPrintSettings(nullptr), mGtkPageSetup(nullptr) {}
+
+nsDeviceContextSpecGTK::~nsDeviceContextSpecGTK() {
+  if (mGtkPageSetup) {
+    g_object_unref(mGtkPageSetup);
+  }
+
+  if (mGtkPrintSettings) {
+    g_object_unref(mGtkPrintSettings);
+  }
+
+  if (mSpoolFile) {
+    mSpoolFile->Remove(false);
+  }
+}
+
+NS_IMPL_ISUPPORTS(nsDeviceContextSpecGTK, nsIDeviceContextSpec)
+
+already_AddRefed<PrintTarget> nsDeviceContextSpecGTK::MakePrintTarget() {
+  double width, height;
+  mPrintSettings->GetEffectiveSheetSize(&width, &height);
+
+  // convert twips to points
+  width /= TWIPS_PER_POINT_FLOAT;
+  height /= TWIPS_PER_POINT_FLOAT;
+
+  // We shouldn't be attempting to get a surface if we've already got a spool
+  // file.
+  MOZ_ASSERT(!mSpoolFile);
+
+  auto stream = [&]() -> nsCOMPtr<nsIOutputStream> {
+    if (mPrintSettings->GetOutputDestination() ==
+        nsIPrintSettings::kOutputDestinationStream) {
+      nsCOMPtr<nsIOutputStream> out;
+      mPrintSettings->GetOutputStream(getter_AddRefs(out));
+      return out;
+    }
+    // Spool file. Use Glib's temporary file function since we're
+    // already dependent on the gtk software stack.
+    gchar* buf;
+    gint fd = g_file_open_tmp("XXXXXX.tmp", &buf, nullptr);
+    if (-1 == fd) {
+      return nullptr;
+    }
+    close(fd);
+    if (NS_FAILED(NS_NewNativeLocalFile(nsDependentCString(buf), false,
+                                        getter_AddRefs(mSpoolFile)))) {
+      unlink(buf);
+      g_free(buf);
+      return nullptr;
+    }
+    mSpoolName = buf;
+    g_free(buf);
+    mSpoolFile->SetPermissions(0600);
+    nsCOMPtr<nsIFileOutputStream> stream =
+        do_CreateInstance("@mozilla.org/network/file-output-stream;1");
+    if (NS_FAILED(stream->Init(mSpoolFile, -1, -1, 0))) {
+      return nullptr;
+    }
+    return stream;
+  }();
+
+  return PrintTargetPDF::CreateOrNull(stream, IntSize::Ceil(width, height));
+}
+
+#define DECLARE_KNOWN_MONOCHROME_SETTING(key_, value_) {"cups-" key_, value_},
+
+struct {
+  const char* mKey;
+  const char* mValue;
+} kKnownMonochromeSettings[] = {
+    CUPS_EACH_MONOCHROME_PRINTER_SETTING(DECLARE_KNOWN_MONOCHROME_SETTING)};
+
+#undef DECLARE_KNOWN_MONOCHROME_SETTING
+
+// https://developer.gnome.org/gtk3/stable/GtkPaperSize.html#gtk-paper-size-new-from-ipp
+static GUniquePtr<GtkPaperSize> GtkPaperSizeFromIpp(const gchar* aIppName,
+                                                    gdouble aWidth,
+                                                    gdouble aHeight) {
+  static auto sPtr = (GtkPaperSize * (*)(const gchar*, gdouble, gdouble))
+      dlsym(RTLD_DEFAULT, "gtk_paper_size_new_from_ipp");
+  if (gtk_check_version(3, 16, 0)) {
+    return nullptr;
+  }
+  return GUniquePtr<GtkPaperSize>(sPtr(aIppName, aWidth, aHeight));
+}
+
+static bool PaperSizeAlmostEquals(GtkPaperSize* aSize,
+                                  GtkPaperSize* aOtherSize) {
+  const double kEpsilon = 1.0;  // millimetres
+  // GTK stores sizes internally in millimetres so just use that.
+  if (fabs(gtk_paper_size_get_height(aSize, GTK_UNIT_MM) -
+           gtk_paper_size_get_height(aOtherSize, GTK_UNIT_MM)) > kEpsilon) {
+    return false;
+  }
+  if (fabs(gtk_paper_size_get_width(aSize, GTK_UNIT_MM) -
+           gtk_paper_size_get_width(aOtherSize, GTK_UNIT_MM)) > kEpsilon) {
+    return false;
+  }
+  return true;
+}
+
+// Prefer the ppd name because some printers don't deal well even with standard
+// ipp names.
+static GUniquePtr<GtkPaperSize> PpdSizeFromIppName(const gchar* aIppName) {
+  static constexpr struct {
+    const char* mCups;
+    const char* mGtk;
+  } kMap[] = {
+      {CUPS_MEDIA_A3, GTK_PAPER_NAME_A3},
+      {CUPS_MEDIA_A4, GTK_PAPER_NAME_A4},
+      {CUPS_MEDIA_A5, GTK_PAPER_NAME_A5},
+      {CUPS_MEDIA_LETTER, GTK_PAPER_NAME_LETTER},
+      {CUPS_MEDIA_LEGAL, GTK_PAPER_NAME_LEGAL},
+      // Other gtk sizes with no standard CUPS constant: _EXECUTIVE and _B5
+  };
+
+  for (const auto& entry : kMap) {
+    if (!strcmp(entry.mCups, aIppName)) {
+      return GUniquePtr<GtkPaperSize>(gtk_paper_size_new(entry.mGtk));
+    }
+  }
+
+  return nullptr;
+}
+
+// This is a horrible workaround for some printer driver bugs that treat custom
+// page sizes different to standard ones. If our paper object matches one of a
+// standard one, use a standard paper size object instead.
+//
+// We prefer ppd to ipp to custom sizes.
+//
+// See bug 414314, bug 1691798, and bug 1717292 for more info.
+static GUniquePtr<GtkPaperSize> GetStandardGtkPaperSize(
+    GtkPaperSize* aGeckoPaperSize) {
+  // We should get an ipp name from cups, try to get a ppd from that first.
+  const gchar* geckoName = gtk_paper_size_get_name(aGeckoPaperSize);
+  if (auto ppd = PpdSizeFromIppName(geckoName)) {
+    return ppd;
+  }
+
+  // We try gtk_paper_size_new_from_ipp next, because even though
+  // gtk_paper_size_new tries to deal with ipp, it has some rounding issues that
+  // the ipp equivalent doesn't have, see
+  // https://gitlab.gnome.org/GNOME/gtk/-/issues/3685.
+  if (auto ipp = GtkPaperSizeFromIpp(
+          geckoName, gtk_paper_size_get_width(aGeckoPaperSize, GTK_UNIT_POINTS),
+          gtk_paper_size_get_height(aGeckoPaperSize, GTK_UNIT_POINTS))) {
+    if (!gtk_paper_size_is_custom(ipp.get())) {
+      if (auto ppd = PpdSizeFromIppName(gtk_paper_size_get_name(ipp.get()))) {
+        return ppd;
+      }
+      return ipp;
+    }
+  }
+
+  GUniquePtr<GtkPaperSize> size(gtk_paper_size_new(geckoName));
+  // gtk_paper_size_is_equal compares just paper names. The name in Gecko
+  // might come from CUPS, which is an ipp size, and gets normalized by gtk.
+  // So check also for the same actual paper size.
+  if (gtk_paper_size_is_equal(size.get(), aGeckoPaperSize) ||
+      PaperSizeAlmostEquals(aGeckoPaperSize, size.get())) {
+    return size;
+  }
+
+  // Not the same after all, so use our custom paper sizes instead.
+  return nullptr;
+}
+
+/** -------------------------------------------------------
+ *  Initialize the nsDeviceContextSpecGTK
+ *  @update   dc 2/15/98
+ *  @update   syd 3/2/99
+ */
+NS_IMETHODIMP nsDeviceContextSpecGTK::Init(nsIPrintSettings* aPS,
+                                           bool aIsPrintPreview) {
+  RefPtr<nsPrintSettingsGTK> settings = do_QueryObject(aPS);
+  if (!settings) {
+    return NS_ERROR_NO_INTERFACE;
+  }
+  mPrintSettings = aPS;
+
+  mGtkPrintSettings = settings->GetGtkPrintSettings();
+  mGtkPageSetup = settings->GetGtkPageSetup();
+
+  GtkPaperSize* geckoPaperSize = gtk_page_setup_get_paper_size(mGtkPageSetup);
+  GUniquePtr<GtkPaperSize> gtkPaperSize =
+      GetStandardGtkPaperSize(geckoPaperSize);
+
+  mGtkPageSetup = gtk_page_setup_copy(mGtkPageSetup);
+  mGtkPrintSettings = gtk_print_settings_copy(mGtkPrintSettings);
+
+  if (!aPS->GetPrintInColor() && StaticPrefs::print_cups_monochrome_enabled()) {
+    for (const auto& setting : kKnownMonochromeSettings) {
+      gtk_print_settings_set(mGtkPrintSettings, setting.mKey, setting.mValue);
+    }
+    auto applySetting = [&](const nsACString& aKey, const nsACString& aVal) {
+      nsAutoCString extra;
+      extra.AppendASCII("cups-");
+      extra.Append(aKey);
+      gtk_print_settings_set(mGtkPrintSettings, extra.get(),
+                             nsAutoCString(aVal).get());
+    };
+    nsPrinterCUPS::ForEachExtraMonochromeSetting(applySetting);
+  }
+
+  GtkPaperSize* properPaperSize =
+      gtkPaperSize ? gtkPaperSize.get() : geckoPaperSize;
+  gtk_print_settings_set_paper_size(mGtkPrintSettings, properPaperSize);
+  gtk_page_setup_set_paper_size_and_default_margins(mGtkPageSetup,
+                                                    properPaperSize);
+  return NS_OK;
+}
+
+static void print_callback(GtkPrintJob* aJob, gpointer aData,
+                           const GError* aError) {
+  g_object_unref(aJob);
+  ((nsIFile*)aData)->Remove(false);
+}
+
+/* static */
+gboolean nsDeviceContextSpecGTK::PrinterEnumerator(GtkPrinter* aPrinter,
+                                                   gpointer aData) {
+  nsDeviceContextSpecGTK* spec = (nsDeviceContextSpecGTK*)aData;
+
+  if (spec->mHasEnumerationFoundAMatch) {
+    // We're already done, but we're letting the enumeration run its course,
+    // to avoid a GTK bug.
+    return FALSE;
+  }
+
+  // Find the printer whose name matches the one inside the settings.
+  nsString printerName;
+  nsresult rv = spec->mPrintSettings->GetPrinterName(printerName);
+  if (NS_SUCCEEDED(rv) && !printerName.IsVoid()) {
+    NS_ConvertUTF16toUTF8 requestedName(printerName);
+    const char* currentName = gtk_printer_get_name(aPrinter);
+    if (requestedName.Equals(currentName)) {
+      nsPrintSettingsGTK::From(spec->mPrintSettings)->SetGtkPrinter(aPrinter);
+
+      // Bug 1145916 - attempting to kick off a print job for this printer
+      // during this tick of the event loop will result in the printer backend
+      // misunderstanding what the capabilities of the printer are due to a
+      // GTK bug (https://bugzilla.gnome.org/show_bug.cgi?id=753041). We
+      // sidestep this by deferring the print to the next tick.
+      NS_DispatchToCurrentThread(
+          NewRunnableMethod("nsDeviceContextSpecGTK::StartPrintJob", spec,
+                            &nsDeviceContextSpecGTK::StartPrintJob));
+
+      // We're already done, but we need to let the enumeration run its course,
+      // to avoid a GTK bug. So we record that we've found a match and
+      // then return FALSE.
+      // TODO: If/when we can be sure that GTK handles this OK, we could
+      // return TRUE to avoid some needless enumeration.
+      spec->mHasEnumerationFoundAMatch = true;
+      return FALSE;
+    }
+  }
+
+  // We haven't found it yet - keep searching...
+  return FALSE;
+}
+
+void nsDeviceContextSpecGTK::StartPrintJob() {
+  GtkPrintJob* job = gtk_print_job_new(
+      mTitle.get(), nsPrintSettingsGTK::From(mPrintSettings)->GetGtkPrinter(),
+      mGtkPrintSettings, mGtkPageSetup);
+
+  if (!gtk_print_job_set_source_file(job, mSpoolName.get(), nullptr)) return;
+
+  // Now gtk owns the print job, and will be released via our callback.
+  gtk_print_job_send(job, print_callback, mSpoolFile.forget().take(),
+                     [](gpointer aData) {
+                       auto* spoolFile = static_cast<nsIFile*>(aData);
+                       NS_RELEASE(spoolFile);
+                     });
+}
+
+void nsDeviceContextSpecGTK::EnumeratePrinters() {
+  mHasEnumerationFoundAMatch = false;
+  gtk_enumerate_printers(&nsDeviceContextSpecGTK::PrinterEnumerator, this,
+                         nullptr, TRUE);
+}
+
+NS_IMETHODIMP
+nsDeviceContextSpecGTK::BeginDocument(const nsAString& aTitle,
+                                      const nsAString& aPrintToFileName,
+                                      int32_t aStartPage, int32_t aEndPage) {
+  // Print job names exceeding 255 bytes are safe with GTK version 3.18.2 or
+  // newer. This is a workaround for old GTK.
+  if (gtk_check_version(3, 18, 2) != nullptr) {
+    PrintTarget::AdjustPrintJobNameForIPP(aTitle, mTitle);
+  } else {
+    CopyUTF16toUTF8(aTitle, mTitle);
+  }
+
+  return NS_OK;
+}
+
+RefPtr<PrintEndDocumentPromise> nsDeviceContextSpecGTK::EndDocument() {
+  switch (mPrintSettings->GetOutputDestination()) {
+    case nsIPrintSettings::kOutputDestinationPrinter: {
+      // At this point, we might have a GtkPrinter set up in nsPrintSettingsGTK,
+      // or we might not. In the single-process case, we probably will, as this
+      // is populated by the print settings dialog, or set to the default
+      // printer.
+      // In the multi-process case, we proxy the print settings dialog over to
+      // the parent process, and only get the name of the printer back on the
+      // content process side. In that case, we need to enumerate the printers
+      // on the content side, and find a printer with a matching name.
+
+      if (nsPrintSettingsGTK::From(mPrintSettings)->GetGtkPrinter()) {
+        // We have a printer, so we can print right away.
+        StartPrintJob();
+      } else {
+        // We don't have a printer. We have to enumerate the printers and find
+        // one with a matching name.
+        NS_DispatchToCurrentThread(
+            NewRunnableMethod("nsDeviceContextSpecGTK::EnumeratePrinters", this,
+                              &nsDeviceContextSpecGTK::EnumeratePrinters));
+      }
+      break;
+    }
+    case nsIPrintSettings::kOutputDestinationFile: {
+      // Handle print-to-file ourselves for the benefit of embedders
+      nsString targetPath;
+      nsCOMPtr<nsIFile> destFile;
+      mPrintSettings->GetToFileName(targetPath);
+
+      nsresult rv =
+          NS_NewLocalFile(targetPath, false, getter_AddRefs(destFile));
+      if (NS_FAILED(rv)) {
+        return PrintEndDocumentPromise::CreateAndReject(rv, __func__);
+      }
+
+      return nsIDeviceContextSpec::EndDocumentAsync(
+          __func__,
+          [destFile = std::move(destFile),
+           spoolFile = std::move(mSpoolFile)]() -> nsresult {
+            nsAutoString destLeafName;
+            auto rv = destFile->GetLeafName(destLeafName);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            nsCOMPtr<nsIFile> destDir;
+            rv = destFile->GetParent(getter_AddRefs(destDir));
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            rv = spoolFile->MoveTo(destDir, destLeafName);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            // This is the standard way to get the UNIX umask. Ugh.
+            mode_t mask = umask(0);
+            umask(mask);
+            // If you're not familiar with umasks, they contain the bits of what
+            // NOT to set in the permissions (thats because files and
+            // directories have different numbers of bits for their permissions)
+            destFile->SetPermissions(0666 & ~(mask));
+            return NS_OK;
+          });
+
+      break;
+    }
+    case nsIPrintSettings::kOutputDestinationStream:
+      // Nothing to do, handled in MakePrintTarget.
+      MOZ_ASSERT(!mSpoolFile);
+      break;
+  }
+  return PrintEndDocumentPromise::CreateAndResolve(true, __func__);
+}