From 14f45e535b4ef4cf169c3e0db817ac519b51b401 Mon Sep 17 00:00:00 2001
From: John Layt <jlayt@kde.org>
Date: Fri, 1 Jun 2012 19:49:45 +0100
Subject: QtPrintSupport - Add CUPS printer and options queries to plugin

Implement initial support in the CUPS plugin for directly calling CUPS
to obtain printer list and basic printer info rather than QCupsSupport.

Add api to the plugin to return any options for a printer, usually IPP
options as implemented for CUPS, but whatever applies for the host
print system.

Future changes will add support for returning the PPD options.  This
api may eventually be added to QPrinterInfo, but not in 5.0.

Change-Id: I6c8bae4c9295009599e6ab31382f5fff4c93981f
Reviewed-by: Teemu Katajisto <teemu.katajisto@digia.com>
Reviewed-by: John Layt <jlayt@kde.org>
---
 .../printsupport/cups/qcupsprintersupport.cpp      | 75 +++++++++++++++++++---
 1 file changed, 67 insertions(+), 8 deletions(-)

(limited to 'src/plugins/printsupport/cups/qcupsprintersupport.cpp')

diff --git a/src/plugins/printsupport/cups/qcupsprintersupport.cpp b/src/plugins/printsupport/cups/qcupsprintersupport.cpp
index 83d4068d16..493e01df5b 100644
--- a/src/plugins/printsupport/cups/qcupsprintersupport.cpp
+++ b/src/plugins/printsupport/cups/qcupsprintersupport.cpp
@@ -46,16 +46,26 @@
 
 #include <QtPrintSupport/QPrinterInfo>
 
-#include "qcups_p.h"
+#include <cups/ppd.h>
+#ifndef QT_LINUXBASE // LSB merges everything into cups.h
+# include <cups/language.h>
+#endif
 
 QT_BEGIN_NAMESPACE
 
-QCupsPrinterSupport::QCupsPrinterSupport() : QPlatformPrinterSupport()
+QCupsPrinterSupport::QCupsPrinterSupport() : QPlatformPrinterSupport(),
+                                             m_cups(QLatin1String("cups"), 2),
+                                             m_cupsPrinters(0),
+                                             m_cupsPrintersCount(0)
 {
+    loadCups();
+    loadCupsPrinters();
 }
 
 QCupsPrinterSupport::~QCupsPrinterSupport()
 {
+    if (cupsFreeDests)
+        cupsFreeDests(m_cupsPrintersCount, m_cupsPrinters);
 }
 
 QPrintEngine *QCupsPrinterSupport::createNativePrintEngine(QPrinter::PrinterMode printerMode)
@@ -74,14 +84,63 @@ QList<QPrinter::PaperSize> QCupsPrinterSupport::supportedPaperSizes(const QPrint
     return QCUPSSupport::getCupsPrinterPaperSizes(printerIndex(printerInfo));
 }
 
-QList<QPrinterInfo> QCupsPrinterSupport::availablePrinters()
+void QCupsPrinterSupport::loadCups()
 {
-    QList<QPrinterInfo> printers;
-    foreach (const QCUPSSupport::Printer &p,  QCUPSSupport::availableUnixPrinters()) {
-        QPrinterInfo printer = createPrinterInfo(p.name, QString(), QString(), QString(), p.isDefault, p.cupsPrinterIndex);
-        printers.append(printer);
+    cupsGetDests = (CupsGetDests) m_cups.resolve("cupsGetDests");
+    cupsFreeDests = (CupsFreeDests) m_cups.resolve("cupsFreeDests");
+    cupsGetOption = (CupsGetOption) m_cups.resolve("cupsGetOption");
+}
+
+void QCupsPrinterSupport::loadCupsPrinters()
+{
+    m_cupsPrintersCount = 0;
+    m_printers.clear();
+
+    if (cupsFreeDests)
+        cupsFreeDests(m_cupsPrintersCount, m_cupsPrinters);
+
+    if (cupsGetDests)
+        m_cupsPrintersCount = cupsGetDests(&m_cupsPrinters);
+
+    for (int i = 0; i < m_cupsPrintersCount; ++i) {
+        QString printerName = QString::fromLocal8Bit(m_cupsPrinters[i].name);
+        if (m_cupsPrinters[i].instance)
+            printerName += QLatin1Char('/') + QString::fromLocal8Bit(m_cupsPrinters[i].instance);
+        QString description = cupsOption(i, "printer-info");
+        QString location = cupsOption(i, "printer-location");
+        QString makeAndModel = cupsOption(i, "printer-make-and-model");
+        QPrinterInfo printer = createPrinterInfo(printerName, description, location, makeAndModel,
+                                                 m_cupsPrinters[i].is_default, i);
+        m_printers.append(printer);
+    }
+}
+
+QString QCupsPrinterSupport::printerOption(const QPrinterInfo &printer, const QString &key) const
+{
+    return cupsOption(printerIndex(printer), key);
+}
+
+QString QCupsPrinterSupport::cupsOption(int i, const QString &key) const
+{
+    QString value;
+    if (i > -1 && i < m_cupsPrintersCount && cupsGetOption)
+        value = cupsGetOption(key.toLocal8Bit(), m_cupsPrinters[i].num_options, m_cupsPrinters[i].options);
+    return value;
+}
+
+PrinterOptions QCupsPrinterSupport::printerOptions(const QPrinterInfo &printer) const
+{
+    PrinterOptions options;
+    int p = printerIndex(printer);
+    if (p <= -1 || p >= m_cupsPrintersCount)
+        return options;
+    int numOptions = m_cupsPrinters[p].num_options;
+    for (int i = 0; i < numOptions; ++i) {
+        QString name = m_cupsPrinters[p].options[i].name;
+        QString value = m_cupsPrinters[p].options[i].value;
+        options.insert(name, value);
     }
-    return printers;
+    return options;
 }
 
 QT_END_NAMESPACE
-- 
cgit v1.2.3