Add support for dynamically loading print plugins

Scraped out CUPS & CPDB specific code from print dialog frontend,
and put it in their respective print plugin directories.

This allows the print dialog to be able to dynamically select
print backends at runtime instead of having to choose one at build time.

Change-Id: I8ae53d19d91aa9689ec327fd8077558744e4768b

Author: TinyTrebuchet

src/plugins/printsupport/CMakeLists.txt

@@ -5,6 +5,7 @@
 
 if(QT_FEATURE_cpdb AND UNIX AND NOT APPLE)
     add_subdirectory(cpdb)
-elseif(QT_FEATURE_cups AND UNIX AND NOT APPLE)
+endif()
+if (QT_FEATURE_cups AND UNIX AND NOT APPLE)
     add_subdirectory(cups)
 endif()

src/plugins/printsupport/cpdb/CMakeLists.txt

@@ -7,6 +7,7 @@ qt_internal_add_plugin(QCpdbPrinterSupportPlugin
     PLUGIN_TYPE printsupport
     SOURCES
         main.cpp
+        qcpdb.cpp qcpdb_p.h
         qcpdbprintengine.cpp qcpdbprintengine_p.h
         qcpdbprintersupport.cpp qcpdbprintersupport_p.h
         qcpdbprintdevice.cpp qcpdbprintdevice.h

src/plugins/printsupport/cpdb/cpdb.json

@@ -1,3 +1,4 @@
 {
-    "Keys": [ "cpdbprintersupport" ]
+    "Keys": [ "cpdbprintersupport" ],
+    "Priority": 80
 }

src/printsupport/kernel/qcpdb.cpp renamed to src/plugins/printsupport/cpdb/qcpdb.cpp

@@ -18,6 +18,8 @@
 
 #include <QtPrintSupport/private/qtprintsupportglobal_p.h>
 #include <QtPrintSupport/private/qprint_p.h>
+#include <QHash>
+#include <QLocale>
 
 #include <cpdb/frontend.h>
 
@@ -29,16 +31,45 @@ class QPrintDevice;
 
 #define PDPK_CpdbPrinterObj QPrintDevice::PrintDevicePropertyKey(QPrintDevice::PDPK_CustomBase + 0x10)
 
-class Q_PRINTSUPPORT_EXPORT QCPDBSupport
+class QCPDBSupport
 {
 public:
     constexpr static qreal pointsMultiplier = 2.83464566929; // 1mm to points
 
     static const char *translateOption(cpdb_printer_obj_t *printerObj, const char *optionName);
     static const char *translateChoice(cpdb_printer_obj_t *printerObj, const char *optionName, const char *choiceName);
     static const char *translateGroup(cpdb_printer_obj_t *printerObj, const char *groupName);
+
+    const static inline QHash<QByteArray,QByteArray> numUpDist = {
+        {"1", "1x1"},
+        {"2", "2x1"},
+        {"4", "2x2"},
+        {"6", "2x3"},
+        {"9", "3x3"},
+        {"16", "4x4"},
+
+        {"1x1", "1"},
+        {"2x1", "2"},
+        {"2x2", "4"},
+        {"2x3", "6"},
+        {"3x3", "9"},
+        {"4x4", "16"},
+    };
+
+    const static inline QHash<QByteArray,QPrint::DuplexMode> duplexMap = {
+        {CPDB_SIDES_ONE_SIDED, QPrint::DuplexNone},
+        {CPDB_SIDES_TWO_SIDED_SHORT, QPrint::DuplexShortSide},
+        {CPDB_SIDES_TWO_SIDED_LONG, QPrint::DuplexLongSide}
+    };
+
+    const static inline QHash<QPrint::DuplexMode,QByteArray> qDuplexMap = {
+        {QPrint::DuplexNone, CPDB_SIDES_ONE_SIDED},
+        {QPrint::DuplexShortSide, CPDB_SIDES_TWO_SIDED_SHORT},
+        {QPrint::DuplexLongSide, CPDB_SIDES_TWO_SIDED_LONG}
+    };
 };
 
+
 QT_END_NAMESPACE
 
 #endif // QCPDBSUPPORT_H