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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ex: set tabstop=8 softtabstop=4 shiftwidth=4 expandtab: */
/* 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 "nscore.h"
#include "nsCUPSShim.h"
#include "nsIServiceManager.h"
#include "nsPSPrinters.h"
#include "nsReadableUtils.h" // StringBeginsWith()
#include "nsCUPSShim.h"
#include "mozilla/Preferences.h"
#include "prlink.h"
#include "prenv.h"
#include "plstr.h"
using namespace mozilla;
#define NS_CUPS_PRINTER "CUPS/"
#define NS_CUPS_PRINTER_LEN (sizeof(NS_CUPS_PRINTER) - 1)
/* dummy printer name for the gfx/src/ps driver */
#define NS_POSTSCRIPT_DRIVER_NAME "PostScript/"
nsCUPSShim gCupsShim;
nsPSPrinterList::nsPSPrinterList()
{
// Should we try cups?
if (Preferences::GetBool("print.postscript.cups.enabled", true) &&
!gCupsShim.IsInitialized()) {
gCupsShim.Init();
}
}
/* Check whether the PostScript module has been disabled at runtime */
bool
nsPSPrinterList::Enabled()
{
const char *val = PR_GetEnv("MOZILLA_POSTSCRIPT_ENABLED");
if (val && (val[0] == '0' || !PL_strcasecmp(val, "false")))
return false;
// is the PS module enabled?
return Preferences::GetBool("print.postscript.enabled", true);
}
/* Fetch a list of printers handled by the PostsScript module */
void
nsPSPrinterList::GetPrinterList(nsTArray<nsCString>& aList)
{
aList.Clear();
// Query CUPS for a printer list. The default printer goes to the
// head of the output list; others are appended.
if (gCupsShim.IsInitialized()) {
cups_dest_t *dests;
int num_dests = (gCupsShim.mCupsGetDests)(&dests);
if (num_dests) {
for (int i = 0; i < num_dests; i++) {
nsAutoCString fullName(NS_CUPS_PRINTER);
fullName.Append(dests[i].name);
if (dests[i].instance != nullptr) {
fullName.Append('/');
fullName.Append(dests[i].instance);
}
if (dests[i].is_default)
aList.InsertElementAt(0, fullName);
else
aList.AppendElement(fullName);
}
}
(gCupsShim.mCupsFreeDests)(num_dests, dests);
}
// Build the "classic" list of printers -- those accessed by running
// an opaque command. This list always contains a printer named "default".
// In addition, we look for either an environment variable
// MOZILLA_POSTSCRIPT_PRINTER_LIST or a preference setting
// print.printer_list, which contains a space-separated list of printer
// names.
aList.AppendElement(
NS_LITERAL_CSTRING(NS_POSTSCRIPT_DRIVER_NAME "default"));
nsAutoCString list(PR_GetEnv("MOZILLA_POSTSCRIPT_PRINTER_LIST"));
if (list.IsEmpty()) {
list = Preferences::GetCString("print.printer_list");
}
if (!list.IsEmpty()) {
// For each printer (except "default" which was already added),
// construct a string "PostScript/<name>" and append it to the list.
char *state;
for (char *name = PL_strtok_r(list.BeginWriting(), " ", &state);
nullptr != name;
name = PL_strtok_r(nullptr, " ", &state)
) {
if (0 != strcmp(name, "default")) {
nsAutoCString fullName(NS_POSTSCRIPT_DRIVER_NAME);
fullName.Append(name);
aList.AppendElement(fullName);
}
}
}
}
/* Identify the printer type */
nsPSPrinterList::PrinterType
nsPSPrinterList::GetPrinterType(const nsACString& aName)
{
if (StringBeginsWith(aName, NS_LITERAL_CSTRING(NS_POSTSCRIPT_DRIVER_NAME)))
return kTypePS;
else if (StringBeginsWith(aName, NS_LITERAL_CSTRING(NS_CUPS_PRINTER)))
return kTypeCUPS;
else
return kTypeUnknown;
}
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