michael@0: /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* ex: set tabstop=8 softtabstop=4 shiftwidth=4 expandtab: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nscore.h"
michael@0: #include "nsCUPSShim.h"
michael@0: #include "nsIServiceManager.h"
michael@0: #include "nsPSPrinters.h"
michael@0: #include "nsReadableUtils.h"        // StringBeginsWith()
michael@0: #include "nsCUPSShim.h"
michael@0: #include "mozilla/Preferences.h"
michael@0: 
michael@0: #include "prlink.h"
michael@0: #include "prenv.h"
michael@0: #include "plstr.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: 
michael@0: #define NS_CUPS_PRINTER "CUPS/"
michael@0: #define NS_CUPS_PRINTER_LEN (sizeof(NS_CUPS_PRINTER) - 1)
michael@0: 
michael@0: /* dummy printer name for the gfx/src/ps driver */
michael@0: #define NS_POSTSCRIPT_DRIVER_NAME "PostScript/"
michael@0: 
michael@0: nsCUPSShim gCupsShim;
michael@0: 
michael@0: nsPSPrinterList::nsPSPrinterList()
michael@0: {
michael@0:     // Should we try cups?
michael@0:     if (Preferences::GetBool("print.postscript.cups.enabled", true) &&
michael@0:         !gCupsShim.IsInitialized()) {
michael@0:         gCupsShim.Init();
michael@0:     }
michael@0: }
michael@0: 
michael@0: 
michael@0: /* Check whether the PostScript module has been disabled at runtime */
michael@0: bool
michael@0: nsPSPrinterList::Enabled()
michael@0: {
michael@0:     const char *val = PR_GetEnv("MOZILLA_POSTSCRIPT_ENABLED");
michael@0:     if (val && (val[0] == '0' || !PL_strcasecmp(val, "false")))
michael@0:         return false;
michael@0: 
michael@0:     // is the PS module enabled?
michael@0:     return Preferences::GetBool("print.postscript.enabled", true);
michael@0: }
michael@0: 
michael@0: 
michael@0: /* Fetch a list of printers handled by the PostsScript module */
michael@0: void
michael@0: nsPSPrinterList::GetPrinterList(nsTArray<nsCString>& aList)
michael@0: {
michael@0:     aList.Clear();
michael@0: 
michael@0:     // Query CUPS for a printer list. The default printer goes to the
michael@0:     // head of the output list; others are appended.
michael@0:     if (gCupsShim.IsInitialized()) {
michael@0:         cups_dest_t *dests;
michael@0: 
michael@0:         int num_dests = (gCupsShim.mCupsGetDests)(&dests);
michael@0:         if (num_dests) {
michael@0:             for (int i = 0; i < num_dests; i++) {
michael@0:                 nsAutoCString fullName(NS_CUPS_PRINTER);
michael@0:                 fullName.Append(dests[i].name);
michael@0:                 if (dests[i].instance != nullptr) {
michael@0:                     fullName.Append("/");
michael@0:                     fullName.Append(dests[i].instance);
michael@0:                 }
michael@0:                 if (dests[i].is_default)
michael@0:                     aList.InsertElementAt(0, fullName);
michael@0:                 else
michael@0:                     aList.AppendElement(fullName);
michael@0:             }
michael@0:         }
michael@0:         (gCupsShim.mCupsFreeDests)(num_dests, dests);
michael@0:     }
michael@0: 
michael@0:     // Build the "classic" list of printers -- those accessed by running
michael@0:     // an opaque command. This list always contains a printer named "default".
michael@0:     // In addition, we look for either an environment variable
michael@0:     // MOZILLA_POSTSCRIPT_PRINTER_LIST or a preference setting
michael@0:     // print.printer_list, which contains a space-separated list of printer
michael@0:     // names.
michael@0:     aList.AppendElement(
michael@0:             NS_LITERAL_CSTRING(NS_POSTSCRIPT_DRIVER_NAME "default"));
michael@0: 
michael@0:     nsAutoCString list(PR_GetEnv("MOZILLA_POSTSCRIPT_PRINTER_LIST"));
michael@0:     if (list.IsEmpty()) {
michael@0:         list = Preferences::GetCString("print.printer_list");
michael@0:     }
michael@0:     if (!list.IsEmpty()) {
michael@0:         // For each printer (except "default" which was already added),
michael@0:         // construct a string "PostScript/<name>" and append it to the list.
michael@0:         char *state;
michael@0: 
michael@0:         for (char *name = PL_strtok_r(list.BeginWriting(), " ", &state);
michael@0:                 nullptr != name;
michael@0:                 name = PL_strtok_r(nullptr, " ", &state)
michael@0:         ) {
michael@0:             if (0 != strcmp(name, "default")) {
michael@0:                 nsAutoCString fullName(NS_POSTSCRIPT_DRIVER_NAME);
michael@0:                 fullName.Append(name);
michael@0:                 aList.AppendElement(fullName);
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: 
michael@0: /* Identify the printer type */
michael@0: nsPSPrinterList::PrinterType
michael@0: nsPSPrinterList::GetPrinterType(const nsACString& aName)
michael@0: {
michael@0:     if (StringBeginsWith(aName, NS_LITERAL_CSTRING(NS_POSTSCRIPT_DRIVER_NAME)))
michael@0:         return kTypePS;
michael@0:     else if (StringBeginsWith(aName, NS_LITERAL_CSTRING(NS_CUPS_PRINTER)))
michael@0:         return kTypeCUPS;
michael@0:     else
michael@0:         return kTypeUnknown;
michael@0: }