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Diffstat (limited to '')
| -rw-r--r-- | widget/gtk/nsDeviceContextSpecG.cpp | 422 |
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__); +} |