pjs/widget/gtk2/nsPSPrinters.cpp

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5.4 KiB
C++

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ex: set tabstop=8 softtabstop=4 shiftwidth=4 expandtab: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Mozilla PostScript driver printer list component.
*
* The Initial Developer of the Original Code is
* Kenneth Herron <kherron+mozilla@fmailbox.com>
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#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++) {
nsCAutoString fullName(NS_CUPS_PRINTER);
fullName.Append(dests[i].name);
if (dests[i].instance != NULL) {
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"));
nsCAutoString 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);
nsnull != name;
name = PL_strtok_r(nsnull, " ", &state)
) {
if (0 != strcmp(name, "default")) {
nsCAutoString 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;
}