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fune/widget/gtk/nsDeviceContextSpecG.cpp
Andi-Bogdan Postelnicu f07c975367 Bug 1519636 - Reformat recent changes to the Google coding style. r=necko-reviewers,emilio 
Updated with clang-format version 12.0.0 (taskcluster-FZRqPXamQIOU_i4hF0cAcg)

Differential Revision: https://phabricator.services.mozilla.com/D117905
2021-06-17 11:00:22 +00:00

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/* -*- 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/PrintTargetPDF.h"
#include "mozilla/gfx/PrintTargetPS.h"
#include "mozilla/Logging.h"
#include "mozilla/Services.h"
#include "plstr.h"
#include "prenv.h" /* for PR_GetEnv */
#include "nsComponentManagerUtils.h"
#include "nsIObserverService.h"
#include "nsPrintfCString.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::PrintTarget;
using mozilla::gfx::PrintTargetPDF;
using mozilla::gfx::PrintTargetPS;
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;
nsresult rv;
// We shouldn't be attempting to get a surface if we've already got a spool
// file.
MOZ_ASSERT(!mSpoolFile);
// 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);
rv = NS_NewNativeLocalFile(nsDependentCString(buf), false,
getter_AddRefs(mSpoolFile));
if (NS_FAILED(rv)) {
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");
rv = stream->Init(mSpoolFile, -1, -1, 0);
if (NS_FAILED(rv)) return nullptr;
int16_t format;
mPrintSettings->GetOutputFormat(&format);
// We assume PDF output if asked for native output.
if (format == nsIPrintSettings::kOutputFormatNative) {
format = nsIPrintSettings::kOutputFormatPDF;
}
IntSize size = IntSize::Ceil(width, height);
if (format == nsIPrintSettings::kOutputFormatPDF) {
return PrintTargetPDF::CreateOrNull(stream, size);
}
int32_t orientation = mPrintSettings->GetSheetOrientation();
return PrintTargetPS::CreateOrNull(
stream, size,
orientation == nsIPrintSettings::kPortraitOrientation
? PrintTargetPS::PORTRAIT
: PrintTargetPS::LANDSCAPE);
}
#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 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 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;
}
// 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.
//
// See bug 414314 and bug 1691798 for more info.
static GtkPaperSize* GetStandardGtkPaperSize(GtkPaperSize* aGeckoPaperSize) {
const gchar* geckoName = gtk_paper_size_get_name(aGeckoPaperSize);
// We try ipp size first because that's the names we get from CUPS, and
// because even though gtk_paper_size_new deals with ipp, it has rounding
// issues, see https://gitlab.gnome.org/GNOME/gtk/-/issues/3685.
GtkPaperSize* size = GtkPaperSizeFromIpp(
geckoName, gtk_paper_size_get_width(aGeckoPaperSize, GTK_UNIT_POINTS),
gtk_paper_size_get_height(aGeckoPaperSize, GTK_UNIT_POINTS));
if (size && !gtk_paper_size_is_custom(size)) {
return size;
}
if (size) {
gtk_paper_size_free(size);
}
size = gtk_paper_size_new(geckoName);
if (gtk_paper_size_is_equal(size, aGeckoPaperSize)) {
return size;
}
// 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 (PaperSizeAlmostEquals(aGeckoPaperSize, size)) {
return size;
}
// Not the same after all, so use our custom paper size.
gtk_paper_size_free(size);
return nullptr;
}
/** -------------------------------------------------------
* Initialize the nsDeviceContextSpecGTK
* @update dc 2/15/98
* @update syd 3/2/99
*/
NS_IMETHODIMP nsDeviceContextSpecGTK::Init(nsIWidget* aWidget,
nsIPrintSettings* aPS,
bool aIsPrintPreview) {
mPrintSettings = do_QueryInterface(aPS);
if (!mPrintSettings) {
return NS_ERROR_NO_INTERFACE;
}
// This is only set by embedders
bool toFile;
aPS->GetPrintToFile(&toFile);
mToPrinter = !toFile && !aIsPrintPreview;
mGtkPrintSettings = mPrintSettings->GetGtkPrintSettings();
mGtkPageSetup = mPrintSettings->GetGtkPageSetup();
GtkPaperSize* geckoPaperSize = gtk_page_setup_get_paper_size(mGtkPageSetup);
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 : geckoPaperSize;
gtk_print_settings_set_paper_size(mGtkPrintSettings, properPaperSize);
gtk_page_setup_set_paper_size_and_default_margins(mGtkPageSetup,
properPaperSize);
if (gtkPaperSize) {
gtk_paper_size_free(gtkPaperSize);
}
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;
// 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)) {
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));
return TRUE;
}
}
// We haven't found it yet - keep searching...
return FALSE;
}
void nsDeviceContextSpecGTK::StartPrintJob() {
// When using flatpak, we have to call the Print method of the portal
nsCOMPtr<nsIGIOService> giovfs = do_GetService(NS_GIOSERVICE_CONTRACTID);
bool shouldUsePortal;
giovfs->ShouldUseFlatpakPortal(&shouldUsePortal);
if (shouldUsePortal) {
GError* error = nullptr;
GDBusProxy* dbusProxy = g_dbus_proxy_new_for_bus_sync(
G_BUS_TYPE_SESSION, G_DBUS_PROXY_FLAGS_NONE, nullptr,
"org.freedesktop.portal.Desktop", "/org/freedesktop/portal/desktop",
"org.freedesktop.portal.Print", nullptr, &error);
if (dbusProxy == nullptr) {
NS_WARNING(
nsPrintfCString("Unable to create dbus proxy: %s", error->message)
.get());
g_error_free(error);
return;
}
int fd = open(mSpoolName.get(), O_RDONLY | O_CLOEXEC);
if (fd == -1) {
NS_WARNING("Failed to open spool file.");
return;
}
static auto s_g_unix_fd_list_new = reinterpret_cast<GUnixFDList* (*)(void)>(
dlsym(RTLD_DEFAULT, "g_unix_fd_list_new"));
NS_ASSERTION(s_g_unix_fd_list_new,
"Cannot find g_unix_fd_list_new function.");
GUnixFDList* fd_list = s_g_unix_fd_list_new();
static auto s_g_unix_fd_list_append =
reinterpret_cast<gint (*)(GUnixFDList*, gint, GError**)>(
dlsym(RTLD_DEFAULT, "g_unix_fd_list_append"));
int idx = s_g_unix_fd_list_append(fd_list, fd, NULL);
close(fd);
// We'll pass empty options as long as we don't have token from PreparePrint
// dbus call (which we don't use). This unfortunatelly lead to showing
// gtk print dialog and also the duplex or printer specific settings
// is not honored, so this needs to be fixed when the portal provides
// more options.
GVariantBuilder opt_builder;
g_variant_builder_init(&opt_builder, G_VARIANT_TYPE_VARDICT);
g_dbus_proxy_call_with_unix_fd_list(
dbusProxy, "Print",
g_variant_new("(ssh@a{sv})", "", /* window */
"Print", /* title */
idx, g_variant_builder_end(&opt_builder)),
G_DBUS_CALL_FLAGS_NONE, -1, fd_list, NULL,
NULL, // portal result cb function
nullptr); // userdata
g_object_unref(fd_list);
g_object_unref(dbusProxy);
} else {
GtkPrintJob* job =
gtk_print_job_new(mTitle.get(), 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() {
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;
}
NS_IMETHODIMP nsDeviceContextSpecGTK::EndDocument() {
if (mToPrinter) {
// 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 (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));
}
} else {
// 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));
NS_ENSURE_SUCCESS(rv, rv);
nsAutoString destLeafName;
rv = destFile->GetLeafName(destLeafName);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIFile> destDir;
rv = destFile->GetParent(getter_AddRefs(destDir));
NS_ENSURE_SUCCESS(rv, rv);
rv = mSpoolFile->MoveTo(destDir, destLeafName);
NS_ENSURE_SUCCESS(rv, rv);
mSpoolFile = nullptr;
// 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));
// Notify flatpak printing portal that file is completely written
nsCOMPtr<nsIGIOService> giovfs = do_GetService(NS_GIOSERVICE_CONTRACTID);
bool shouldUsePortal;
if (giovfs) {
giovfs->ShouldUseFlatpakPortal(&shouldUsePortal);
if (shouldUsePortal) {
// Use the name of the file for printing to match with
// nsFlatpakPrintPortal
nsCOMPtr<nsIObserverService> os =
mozilla::services::GetObserverService();
// Pass filename to be sure that observer process the right data
os->NotifyObservers(nullptr, "print-to-file-finished",
targetPath.get());
}
}
}
return NS_OK;
}
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