data: Option to run only C/C++ preprocessor when indexing (issue 297)

* Added as checkbox to indexing start dialog
* Only shown for C/C++ projects
* Files will be marked incomplete

src/lib_java/data/indexer/IndexerCommandJava.cpp

@@ -29,3 +29,12 @@ std::vector<FilePath> IndexerCommandJava::getClassPath() const
 {
 	return m_classPath;
 }
+
+bool IndexerCommandJava::preprocessorOnly() const
+{
+	return false;
+}
+
+void IndexerCommandJava::setPreprocessorOnly(bool preprocessorOnly)
+{
+}

src/lib_java/data/indexer/IndexerCommandJava.h

@@ -6,7 +6,8 @@
 #include "data/indexer/IndexerCommand.h"
 #include "utility/file/FilePath.h"
 
-class IndexerCommandJava: public IndexerCommand
+class IndexerCommandJava
+	: public IndexerCommand
 {
 public:
 	static std::string getIndexerKindString();
@@ -18,10 +19,13 @@ public:
 		const std::vector<FilePath>& classPath);
 	virtual ~IndexerCommandJava();
 
-	virtual std::string getKindString() const;
+	std::string getKindString() const override;
 
 	std::vector<FilePath> getClassPath() const;
 
+	bool preprocessorOnly() const override;
+	void setPreprocessorOnly(bool preprocessorOnly) override;
+
 private:
 	std::vector<FilePath> m_classPath;
 };