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gecko-dev/widget/gtk/nsDeviceContextSpecG.cpp

410 строки
14 KiB
C++
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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/PrintPromise.h"
#include "mozilla/gfx/PrintTargetPDF.h"
#include "mozilla/Logging.h"
#include "mozilla/Services.h"
#include "mozilla/GUniquePtr.h"
#include "mozilla/WidgetUtilsGtk.h"
#include "plstr.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;
// 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));
return TRUE;
}
}
// 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() {
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__);
}
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