зеркало из https://github.com/mozilla/gecko-dev.git
110 строки
3.6 KiB
C++
110 строки
3.6 KiB
C++
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ex: set tabstop=8 softtabstop=4 shiftwidth=4 expandtab: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nscore.h"
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#include "nsCUPSShim.h"
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#include "nsPSPrinters.h"
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#include "nsReadableUtils.h" // StringBeginsWith()
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#include "nsCUPSShim.h"
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#include "mozilla/Preferences.h"
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#include "prlink.h"
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#include "prenv.h"
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#include "plstr.h"
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using namespace mozilla;
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#define NS_CUPS_PRINTER "CUPS/"
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#define NS_CUPS_PRINTER_LEN (sizeof(NS_CUPS_PRINTER) - 1)
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/* dummy printer name for the gfx/src/ps driver */
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#define NS_POSTSCRIPT_DRIVER_NAME "PostScript/"
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nsCUPSShim gCupsShim;
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nsPSPrinterList::nsPSPrinterList() {
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// Should we try cups?
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if (Preferences::GetBool("print.postscript.cups.enabled", true) &&
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!gCupsShim.IsInitialized()) {
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gCupsShim.Init();
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}
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}
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/* Check whether the PostScript module has been disabled at runtime */
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bool nsPSPrinterList::Enabled() {
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const char* val = PR_GetEnv("MOZILLA_POSTSCRIPT_ENABLED");
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if (val && (val[0] == '0' || !PL_strcasecmp(val, "false"))) return false;
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// is the PS module enabled?
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return Preferences::GetBool("print.postscript.enabled", true);
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}
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/* Fetch a list of printers handled by the PostsScript module */
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void nsPSPrinterList::GetPrinterList(nsTArray<nsCString>& aList) {
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aList.Clear();
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// Query CUPS for a printer list. The default printer goes to the
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// head of the output list; others are appended.
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if (gCupsShim.IsInitialized()) {
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cups_dest_t* dests;
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int num_dests = (gCupsShim.mCupsGetDests)(&dests);
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if (num_dests) {
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for (int i = 0; i < num_dests; i++) {
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nsAutoCString fullName(NS_CUPS_PRINTER);
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fullName.Append(dests[i].name);
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if (dests[i].instance != nullptr) {
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fullName.Append('/');
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fullName.Append(dests[i].instance);
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}
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if (dests[i].is_default)
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aList.InsertElementAt(0, fullName);
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else
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aList.AppendElement(fullName);
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}
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}
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(gCupsShim.mCupsFreeDests)(num_dests, dests);
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}
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// Build the "classic" list of printers -- those accessed by running
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// an opaque command. This list always contains a printer named "default".
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// In addition, we look for either an environment variable
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// MOZILLA_POSTSCRIPT_PRINTER_LIST or a preference setting
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// print.printer_list, which contains a space-separated list of printer
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// names.
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aList.AppendElement(NS_LITERAL_CSTRING(NS_POSTSCRIPT_DRIVER_NAME "default"));
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nsAutoCString list(PR_GetEnv("MOZILLA_POSTSCRIPT_PRINTER_LIST"));
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if (list.IsEmpty()) {
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Preferences::GetCString("print.printer_list", list);
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}
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if (!list.IsEmpty()) {
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// For each printer (except "default" which was already added),
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// construct a string "PostScript/<name>" and append it to the list.
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char* state;
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for (char* name = PL_strtok_r(list.BeginWriting(), " ", &state);
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nullptr != name; name = PL_strtok_r(nullptr, " ", &state)) {
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if (0 != strcmp(name, "default")) {
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nsAutoCString fullName(NS_POSTSCRIPT_DRIVER_NAME);
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fullName.Append(name);
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aList.AppendElement(fullName);
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}
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}
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}
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}
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/* Identify the printer type */
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nsPSPrinterList::PrinterType nsPSPrinterList::GetPrinterType(
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const nsACString& aName) {
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if (StringBeginsWith(aName, NS_LITERAL_CSTRING(NS_POSTSCRIPT_DRIVER_NAME)))
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return kTypePS;
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else if (StringBeginsWith(aName, NS_LITERAL_CSTRING(NS_CUPS_PRINTER)))
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return kTypeCUPS;
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else
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return kTypeUnknown;
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}
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