[printergui] Fill location column by working around cups bug

CUPS docs say cupsGetDests should also fill in "printer-location"
for all the printers, but in fact it doesn't. So query the printer
attributes using ipp.

1 files changed, 29 insertions, 4 deletions

diff --git a/src/maingui/printergui.cpp b/src/maingui/printergui.cpp
index bb6122f..528400e 100644
--- a/src/maingui/printergui.cpp
+++ b/src/maingui/printergui.cpp
@@ -114,17 +114,38 @@ void PrinterGui::initializeUI()
 
 	// Fill treewidget with data from cups dests;
 	cups_dest_t *dest = dests;
-	for (int i = num_dests; i>0; ++dest, --i )
+	for (int i = num_dests; i > 0; ++dest, --i) {
 		if (dest->instance == NULL) {
+			char uri[1000];
+			ipp_t *req = ippNewRequest(IPP_OP_GET_PRINTER_ATTRIBUTES);
+			httpAssembleURIf(HTTP_URI_CODING_ALL, uri, sizeof(uri), "ipp", NULL,
+					"localhost", ippPort(), "/printers/%s", dest->name);
+			ippAddString(req, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri",
+			NULL, uri);
+			ippAddString(req, IPP_TAG_OPERATION, IPP_TAG_NAME,
+					"requesting-user-name",
+					NULL, cupsUser());
+			ipp_t *res = cupsDoRequest(CUPS_HTTP_DEFAULT, req, "/");
+			ipp_attribute_t *attr = ippFindAttribute(res, "printer-location", IPP_TAG_TEXT);
+			const char *location = "";
+			if (attr != NULL) {
+				location = ippGetString(attr, 0, NULL);
+				if (location == NULL) {
+					location = "";
+				}
+			}
 			QTreeWidgetItem *wi = new QTreeWidgetItem();
 			wi->setText(0, QString::fromUtf8(dest->name));
-			wi->setText(1, QString::fromUtf8(cupsGetOption("printer-info", dest->num_options, dest->options)));
-			wi->setText(2, QString::fromUtf8(cupsGetOption("printer-location", dest->num_options, dest->options)));
+			wi->setText(1, QString::fromUtf8(
+					cupsGetOption("printer-info", dest->num_options, dest->options)));
+			wi->setText(2, QString::fromUtf8(location));
 			ui->printerList->addTopLevelItem(wi);
 			if (dest->is_default) {
 				ui->printerList->setCurrentItem(wi);
 			}
+			ippDelete(res);
 		}
+	}
 
 	// Resize columns to contents
 	for (int i = 0; i < 3; ++i) {
@@ -240,7 +261,11 @@ void PrinterGui::on_printerList_currentItemChanged(QTreeWidgetItem *current, QTr
 {
 	ui->printerList->setFocus();
 
-	cups_dest_t *dest = cupsGetNamedDest(CUPS_HTTP_DEFAULT, current->text(0).toUtf8().constData(), NULL);
+	cups_dest_t *dest = cupsGetDest(
+		                      ui->printerList->currentItem()->text(0).toUtf8().constData(),
+		                      NULL,
+		                      num_dests,
+		                      dests);
 
 
 	/* * Check printer properties (auth, color, duplex, copies) * */