lok: add Office::getFilterTypes()

Change-Id: I3b1f4e11f2495e5ccb41f85802f243c0190695ee

desktop/source/lib/init.cxx

@@ -317,6 +317,8 @@ static LibreOfficeKitDocument* lo_documentLoadWithOptions  (LibreOfficeKit* pThi
 static void                    lo_registerCallback (LibreOfficeKit* pThis,
                                                     LibreOfficeKitCallback pCallback,
                                                     void* pData);
+static char* lo_getFilterTypes(LibreOfficeKit* pThis);
+
 struct LibLibreOffice_Impl : public _LibreOfficeKit
 {
     OUString maLastExceptionMsg;
@@ -339,6 +341,7 @@ struct LibLibreOffice_Impl : public _LibreOfficeKit
             m_pOfficeClass->getError = lo_getError;
             m_pOfficeClass->documentLoadWithOptions = lo_documentLoadWithOptions;
             m_pOfficeClass->registerCallback = lo_registerCallback;
+            m_pOfficeClass->getFilterTypes = lo_getFilterTypes;
 
             gOfficeClass = m_pOfficeClass;
         }
@@ -1095,6 +1098,42 @@ static char* lo_getError (LibreOfficeKit *pThis)
     return pMemory;
 }
 
+static char* lo_getFilterTypes(LibreOfficeKit* pThis)
+{
+    LibLibreOffice_Impl* pImpl = static_cast<LibLibreOffice_Impl*>(pThis);
+
+    if (!xSFactory.is())
+        xSFactory = comphelper::getProcessServiceFactory();
+
+    if (!xSFactory.is())
+    {
+        pImpl->maLastExceptionMsg = "Service factory is not available";
+        return 0;
+    }
+
+    uno::Reference<container::XNameAccess> xTypeDetection(xSFactory->createInstance("com.sun.star.document.TypeDetection"), uno::UNO_QUERY);
+    uno::Sequence<OUString> aTypes = xTypeDetection->getElementNames();
+    boost::property_tree::ptree aTree;
+    for (const OUString& rType : aTypes)
+    {
+        uno::Sequence<beans::PropertyValue> aValues;
+        if (xTypeDetection->getByName(rType) >>= aValues)
+        {
+            auto it = std::find_if(aValues.begin(), aValues.end(), [](const beans::PropertyValue& rValue) { return rValue.Name == "MediaType"; });
+            OUString aValue;
+            if (it != aValues.end() && (it->Value >>= aValue) && !aValue.isEmpty())
+            {
+                boost::property_tree::ptree aChild;
+                aChild.put("MediaType", aValue.toUtf8());
+                aTree.add_child(rType.toUtf8().getStr(), aChild);
+            }
+        }
+    }
+    std::stringstream aStream;
+    boost::property_tree::write_json(aStream, aTree);
+    return strdup(aStream.str().c_str());
+}
+
 static void force_c_locale()
 {
     // force locale (and resource files loaded) to en-US

include/LibreOfficeKit/LibreOfficeKit.h

@@ -54,6 +54,9 @@ struct _LibreOfficeKitClass
     void (*registerCallback) (LibreOfficeKit* pThis,
                               LibreOfficeKitCallback pCallback,
                               void* pData);
+
+    /// @see lok::Office::getFilterTypes().
+    char* (*getFilterTypes) (LibreOfficeKit* pThis);
 #endif
 };
 

include/LibreOfficeKit/LibreOfficeKit.hxx

@@ -353,6 +353,27 @@ public:
     {
         return mpThis->pClass->getError(mpThis);
     }
+
+#ifdef LOK_USE_UNSTABLE_API
+    /**
+     * Returns details of filter types.
+     *
+     * Example returned string:
+     *
+     * {
+     *     "writer8": {
+     *         "MediaType": "application/vnd.oasis.opendocument.text"
+     *     },
+     *     "calc8": {
+     *         "MediaType": "application/vnd.oasis.opendocument.spreadsheet"
+     *     }
+     * }
+     */
+    inline char* getFilterTypes()
+    {
+        return mpThis->pClass->getFilterTypes(mpThis);
+    }
+#endif // LOK_USE_UNSTABLE_API
 };
 
 /// Factory method to create a lok::Office instance.