1 files changed, 123 insertions, 0 deletions
diff --git a/widget/gtk/nsPSPrinters.cpp b/widget/gtk/nsPSPrinters.cpp
new file mode 100644
index 0000000000..2d3183e9a1
--- /dev/null
+++ b/widget/gtk/nsPSPrinters.cpp
@@ -0,0 +1,123 @@
+/* -*- 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;
+}