nsPSPrinterList::nsPSPrinterList()
{
// Should we try cups?
if (Preferences::GetBool("print.postscript.cups.enabled", true) &&
!gCupsShim.IsInitialized()) {
gCupsShim.Init();
}
}
/* 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);
}
}
}
}
/* Initialize the printer manager object */
nsresult
nsPSPrinterList::Init()
{
// Should we try cups?
PRBool useCups =
Preferences::GetBool("print.postscript.cups.enabled", PR_TRUE);
if (useCups && !gCupsShim.IsInitialized()) {
gCupsShim.Init();
}
return NS_OK;
}