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gecko/widget/gtk/nsDeviceContextSpecG.cpp
Bob Owen 37274047fc Bug 1156742 Part 9: Add a new nsIDeviceContextSpec for proxied printing. r=roc 
This also changes aPrintToFileName parameter for BeginDocument to an nsAString& from char16_t*.
Having a char16_t* caused a pain with VS2105 where wchar_t != char16_t (as on VS2103), after it had been sent over IPDL.
This could have been worked around with casting, but this seemed like the tidier solution.
2016-01-05 10:08:57 +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 "mozilla/Logging.h"
#include "plstr.h"
#include "nsDeviceContextSpecG.h"
#include "prenv.h" /* for PR_GetEnv */
#include "nsPrintfCString.h"
#include "nsReadableUtils.h"
#include "nsStringEnumerator.h"
#include "nsIServiceManager.h"
#include "nsPSPrinters.h"
#include "nsPaperPS.h" /* Paper size list */
#include "nsPrintSettingsGTK.h"
#include "nsIFileStreams.h"
#include "nsIFile.h"
#include "nsTArray.h"
#include "mozilla/Preferences.h"
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
using namespace mozilla;
static PRLogModuleInfo *
GetDeviceContextSpecGTKLog()
{
static PRLogModuleInfo *sLog;
if (!sLog)
sLog = PR_NewLogModule("DeviceContextSpecGTK");
return sLog;
}
/* Macro to make lines shorter */
#define DO_PR_DEBUG_LOG(x) MOZ_LOG(GetDeviceContextSpecGTKLog(), mozilla::LogLevel::Debug, x)
//----------------------------------------------------------------------------------
// The printer data is shared between the PrinterEnumerator and the nsDeviceContextSpecGTK
// The PrinterEnumerator creates the printer info
// but the nsDeviceContextSpecGTK cleans it up
// If it gets created (via the Page Setup Dialog) but the user never prints anything
// then it will never be delete, so this class takes care of that.
class GlobalPrinters {
public:
static GlobalPrinters* GetInstance() { return &mGlobalPrinters; }
~GlobalPrinters() { FreeGlobalPrinters(); }
void FreeGlobalPrinters();
nsresult InitializeGlobalPrinters();
bool PrintersAreAllocated() { return mGlobalPrinterList != nullptr; }
uint32_t GetNumPrinters()
{ return mGlobalPrinterList ? mGlobalPrinterList->Length() : 0; }
nsString* GetStringAt(int32_t aInx) { return &mGlobalPrinterList->ElementAt(aInx); }
void GetDefaultPrinterName(char16_t **aDefaultPrinterName);
protected:
GlobalPrinters() {}
static GlobalPrinters mGlobalPrinters;
static nsTArray<nsString>* mGlobalPrinterList;
};
//---------------
// static members
GlobalPrinters GlobalPrinters::mGlobalPrinters;
nsTArray<nsString>* GlobalPrinters::mGlobalPrinterList = nullptr;
//---------------
nsDeviceContextSpecGTK::nsDeviceContextSpecGTK()
: mGtkPrintSettings(nullptr)
, mGtkPageSetup(nullptr)
{
DO_PR_DEBUG_LOG(("nsDeviceContextSpecGTK::nsDeviceContextSpecGTK()\n"));
}
nsDeviceContextSpecGTK::~nsDeviceContextSpecGTK()
{
DO_PR_DEBUG_LOG(("nsDeviceContextSpecGTK::~nsDeviceContextSpecGTK()\n"));
if (mGtkPageSetup) {
g_object_unref(mGtkPageSetup);
}
if (mGtkPrintSettings) {
g_object_unref(mGtkPrintSettings);
}
}
NS_IMPL_ISUPPORTS(nsDeviceContextSpecGTK,
nsIDeviceContextSpec)
#include "gfxPDFSurface.h"
#include "gfxPSSurface.h"
NS_IMETHODIMP nsDeviceContextSpecGTK::GetSurfaceForPrinter(gfxASurface **aSurface)
{
*aSurface = nullptr;
double width, height;
mPrintSettings->GetEffectivePageSize(&width, &height);
// convert twips to points
width /= TWIPS_PER_POINT_FLOAT;
height /= TWIPS_PER_POINT_FLOAT;
DO_PR_DEBUG_LOG(("\"%s\", %f, %f\n", mPath, width, height));
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 NS_ERROR_GFX_PRINTER_COULD_NOT_OPEN_FILE;
close(fd);
rv = NS_NewNativeLocalFile(nsDependentCString(buf), false,
getter_AddRefs(mSpoolFile));
if (NS_FAILED(rv)) {
unlink(buf);
return NS_ERROR_GFX_PRINTER_COULD_NOT_OPEN_FILE;
}
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 rv;
int16_t format;
mPrintSettings->GetOutputFormat(&format);
RefPtr<gfxASurface> surface;
gfxSize surfaceSize(width, height);
// Determine the real format with some GTK magic
if (format == nsIPrintSettings::kOutputFormatNative) {
if (mIsPPreview) {
// There is nothing to detect on Print Preview, use PS.
format = nsIPrintSettings::kOutputFormatPS;
} else {
return NS_ERROR_FAILURE;
}
}
if (format == nsIPrintSettings::kOutputFormatPDF) {
surface = new gfxPDFSurface(stream, surfaceSize);
} else {
int32_t orientation;
mPrintSettings->GetOrientation(&orientation);
if (nsIPrintSettings::kPortraitOrientation == orientation) {
surface = new gfxPSSurface(stream, surfaceSize, gfxPSSurface::PORTRAIT);
} else {
surface = new gfxPSSurface(stream, surfaceSize, gfxPSSurface::LANDSCAPE);
}
}
if (!surface)
return NS_ERROR_OUT_OF_MEMORY;
surface.swap(*aSurface);
return NS_OK;
}
/** -------------------------------------------------------
* Initialize the nsDeviceContextSpecGTK
* @update dc 2/15/98
* @update syd 3/2/99
*/
NS_IMETHODIMP nsDeviceContextSpecGTK::Init(nsIWidget *aWidget,
nsIPrintSettings* aPS,
bool aIsPrintPreview)
{
DO_PR_DEBUG_LOG(("nsDeviceContextSpecGTK::Init(aPS=%p)\n", aPS));
if (gtk_major_version < 2 ||
(gtk_major_version == 2 && gtk_minor_version < 10))
return NS_ERROR_NOT_AVAILABLE; // I'm so sorry bz
mPrintSettings = do_QueryInterface(aPS);
if (!mPrintSettings)
return NS_ERROR_NO_INTERFACE;
mIsPPreview = aIsPrintPreview;
// This is only set by embedders
bool toFile;
aPS->GetPrintToFile(&toFile);
mToPrinter = !toFile && !aIsPrintPreview;
mGtkPrintSettings = mPrintSettings->GetGtkPrintSettings();
mGtkPageSetup = mPrintSettings->GetGtkPageSetup();
// 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 for more info.
GtkPaperSize* geckosHackishPaperSize = gtk_page_setup_get_paper_size(mGtkPageSetup);
GtkPaperSize* standardGtkPaperSize = gtk_paper_size_new(gtk_paper_size_get_name(geckosHackishPaperSize));
mGtkPageSetup = gtk_page_setup_copy(mGtkPageSetup);
mGtkPrintSettings = gtk_print_settings_copy(mGtkPrintSettings);
GtkPaperSize* properPaperSize;
if (gtk_paper_size_is_equal(geckosHackishPaperSize, standardGtkPaperSize)) {
properPaperSize = standardGtkPaperSize;
} else {
properPaperSize = geckosHackishPaperSize;
}
gtk_print_settings_set_paper_size(mGtkPrintSettings, properPaperSize);
gtk_page_setup_set_paper_size_and_default_margins(mGtkPageSetup, properPaperSize);
gtk_paper_size_free(standardGtkPaperSize);
return NS_OK;
}
static void
#if (MOZ_WIDGET_GTK == 3)
print_callback(GtkPrintJob *aJob, gpointer aData, const GError *aError) {
#else
print_callback(GtkPrintJob *aJob, gpointer aData, GError *aError) {
#endif
g_object_unref(aJob);
((nsIFile*) aData)->Remove(false);
}
static void
ns_release_macro(gpointer aData) {
nsIFile* spoolFile = (nsIFile*) aData;
NS_RELEASE(spoolFile);
}
/* static */
gboolean nsDeviceContextSpecGTK::PrinterEnumerator(GtkPrinter *aPrinter,
gpointer aData) {
nsDeviceContextSpecGTK *spec = (nsDeviceContextSpecGTK*)aData;
// Find the printer whose name matches the one inside the settings.
nsXPIDLString printerName;
nsresult rv =
spec->mPrintSettings->GetPrinterName(getter_Copies(printerName));
if (NS_SUCCEEDED(rv) && printerName) {
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.
nsCOMPtr<nsIRunnable> event =
NS_NewRunnableMethod(spec, &nsDeviceContextSpecGTK::StartPrintJob);
NS_DispatchToCurrentThread(event);
return TRUE;
}
}
// We haven't found it yet - keep searching...
return FALSE;
}
void nsDeviceContextSpecGTK::StartPrintJob() {
GtkPrintJob* job = gtk_print_job_new(mTitle.get(),
mPrintSettings->GetGtkPrinter(),
mGtkPrintSettings,
mGtkPageSetup);
if (!gtk_print_job_set_source_file(job, mSpoolName.get(), nullptr))
return;
NS_ADDREF(mSpoolFile.get());
gtk_print_job_send(job, print_callback, mSpoolFile, ns_release_macro);
}
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)
{
mTitle.Truncate();
AppendUTF16toUTF8(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.
GtkPrinter* printer = mPrintSettings->GetGtkPrinter();
if (printer) {
// 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.
nsCOMPtr<nsIRunnable> event =
NS_NewRunnableMethod(this, &nsDeviceContextSpecGTK::EnumeratePrinters);
NS_DispatchToCurrentThread(event);
}
} else {
// Handle print-to-file ourselves for the benefit of embedders
nsXPIDLString targetPath;
nsCOMPtr<nsIFile> destFile;
mPrintSettings->GetToFileName(getter_Copies(targetPath));
nsresult rv = NS_NewNativeLocalFile(NS_ConvertUTF16toUTF8(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);
// 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;
}
// Printer Enumerator
nsPrinterEnumeratorGTK::nsPrinterEnumeratorGTK()
{
}
NS_IMPL_ISUPPORTS(nsPrinterEnumeratorGTK, nsIPrinterEnumerator)
NS_IMETHODIMP nsPrinterEnumeratorGTK::GetPrinterNameList(nsIStringEnumerator **aPrinterNameList)
{
NS_ENSURE_ARG_POINTER(aPrinterNameList);
*aPrinterNameList = nullptr;
nsresult rv = GlobalPrinters::GetInstance()->InitializeGlobalPrinters();
if (NS_FAILED(rv)) {
return rv;
}
uint32_t numPrinters = GlobalPrinters::GetInstance()->GetNumPrinters();
nsTArray<nsString> *printers = new nsTArray<nsString>(numPrinters);
if (!printers) {
GlobalPrinters::GetInstance()->FreeGlobalPrinters();
return NS_ERROR_OUT_OF_MEMORY;
}
uint32_t count = 0;
while( count < numPrinters )
{
printers->AppendElement(*GlobalPrinters::GetInstance()->GetStringAt(count++));
}
GlobalPrinters::GetInstance()->FreeGlobalPrinters();
return NS_NewAdoptingStringEnumerator(aPrinterNameList, printers);
}
NS_IMETHODIMP nsPrinterEnumeratorGTK::GetDefaultPrinterName(char16_t **aDefaultPrinterName)
{
DO_PR_DEBUG_LOG(("nsPrinterEnumeratorGTK::GetDefaultPrinterName()\n"));
NS_ENSURE_ARG_POINTER(aDefaultPrinterName);
GlobalPrinters::GetInstance()->GetDefaultPrinterName(aDefaultPrinterName);
DO_PR_DEBUG_LOG(("GetDefaultPrinterName(): default printer='%s'.\n", NS_ConvertUTF16toUTF8(*aDefaultPrinterName).get()));
return NS_OK;
}
NS_IMETHODIMP nsPrinterEnumeratorGTK::InitPrintSettingsFromPrinter(const char16_t *aPrinterName, nsIPrintSettings *aPrintSettings)
{
DO_PR_DEBUG_LOG(("nsPrinterEnumeratorGTK::InitPrintSettingsFromPrinter()"));
NS_ENSURE_ARG_POINTER(aPrintSettings);
/* Set filename */
nsAutoCString filename;
const char *path;
if (!(path = PR_GetEnv("PWD")))
path = PR_GetEnv("HOME");
if (path)
filename = nsPrintfCString("%s/mozilla.pdf", path);
else
filename.AssignLiteral("mozilla.pdf");
DO_PR_DEBUG_LOG(("Setting default filename to '%s'\n", filename.get()));
aPrintSettings->SetToFileName(NS_ConvertUTF8toUTF16(filename).get());
aPrintSettings->SetIsInitializedFromPrinter(true);
return NS_OK;
}
NS_IMETHODIMP nsPrinterEnumeratorGTK::DisplayPropertiesDlg(const char16_t *aPrinter, nsIPrintSettings *aPrintSettings)
{
return NS_OK;
}
//----------------------------------------------------------------------
nsresult GlobalPrinters::InitializeGlobalPrinters ()
{
if (PrintersAreAllocated()) {
return NS_OK;
}
mGlobalPrinterList = new nsTArray<nsString>();
nsPSPrinterList psMgr;
if (psMgr.Enabled()) {
/* Get the list of PostScript-module printers */
// XXX: this function is the only user of GetPrinterList
// So it may be interesting to convert the nsCStrings
// in this function, we would save one loop here
nsTArray<nsCString> printerList;
psMgr.GetPrinterList(printerList);
for (uint32_t i = 0; i < printerList.Length(); i++)
{
mGlobalPrinterList->AppendElement(NS_ConvertUTF8toUTF16(printerList[i]));
}
}
/* If there are no printers available after all checks, return an error */
if (!mGlobalPrinterList->Length())
{
/* Make sure we do not cache an empty printer list */
FreeGlobalPrinters();
return NS_ERROR_GFX_PRINTER_NO_PRINTER_AVAILABLE;
}
return NS_OK;
}
//----------------------------------------------------------------------
void GlobalPrinters::FreeGlobalPrinters()
{
if (mGlobalPrinterList) {
delete mGlobalPrinterList;
mGlobalPrinterList = nullptr;
}
}
void
GlobalPrinters::GetDefaultPrinterName(char16_t **aDefaultPrinterName)
{
*aDefaultPrinterName = nullptr;
bool allocate = !GlobalPrinters::GetInstance()->PrintersAreAllocated();
if (allocate) {
nsresult rv = GlobalPrinters::GetInstance()->InitializeGlobalPrinters();
if (NS_FAILED(rv)) {
return;
}
}
NS_ASSERTION(GlobalPrinters::GetInstance()->PrintersAreAllocated(), "no GlobalPrinters");
if (GlobalPrinters::GetInstance()->GetNumPrinters() == 0)
return;
*aDefaultPrinterName = ToNewUnicode(*GlobalPrinters::GetInstance()->GetStringAt(0));
if (allocate) {
GlobalPrinters::GetInstance()->FreeGlobalPrinters();
}
}
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