ui: file not up to date display

* the codeview now displays a hatched background for a filename when the file's content has changed or the file does not exist anymore.
* added TimePoint class to encapsulate boost.

src/lib/utility/TimePoint.cpp

@@ -0,0 +1,21 @@
+#include "TimePoint.h"
+
+TimePoint::TimePoint()
+	: m_time(boost::posix_time::not_a_date_time)
+{
+}
+
+TimePoint::TimePoint(boost::posix_time::ptime t)
+	: m_time(t)
+{
+}
+
+//TimePoint::TimePoint(time_t t)
+//{
+// needs an implementation
+//}
+
+TimePoint::TimePoint(std::string s)
+{
+	m_time = boost::posix_time::time_from_string(s);
+}

src/lib/utility/TimePoint.h

@@ -0,0 +1,25 @@
+#ifndef TIME_POINT_H
+#define TIME_POINT_H
+
+#include "boost/date_time/posix_time/posix_time.hpp"
+
+class TimePoint
+{
+public:
+	TimePoint();
+	TimePoint(boost::posix_time::ptime t);
+	//TimePoint(time_t t);
+	TimePoint(std::string s);
+
+	inline bool operator==(const TimePoint& rhs){ return m_time == rhs.m_time; }
+	inline bool operator!=(const TimePoint& rhs){ return m_time != rhs.m_time; }
+	inline bool operator<(const TimePoint& rhs){ return m_time < rhs.m_time; }
+	inline bool operator>(const TimePoint& rhs){ return m_time > rhs.m_time; }
+	inline bool operator<=(const TimePoint& rhs){ return m_time <= rhs.m_time; }
+	inline bool operator>=(const TimePoint& rhs){ return m_time >= rhs.m_time; }
+
+private:
+	boost::posix_time::ptime m_time;
+};
+
+#endif // TIME_POINT_H

src/lib/utility/file/FileSystem.cpp

@@ -94,6 +94,17 @@ std::vector<FileInfo> FileSystem::getFileInfosFromPaths(
 	return files;
 }
 
+TimePoint FileSystem::getLastWriteTime(const FilePath& filePath)
+{
+	boost::posix_time::ptime lastWriteTime;
+	if (FileSystem::exists(filePath.str()))
+	{
+		std::time_t t = boost::filesystem::last_write_time(filePath.path());
+		lastWriteTime = boost::posix_time::from_time_t(t);
+	}
+	return TimePoint(lastWriteTime);
+}
+
 std::string FileSystem::getTimeStringNow() // TODO: move to utility
 {
 	return boost::posix_time::to_iso_string(boost::posix_time::second_clock::universal_time());

src/lib/utility/file/FileSystem.h

@@ -5,6 +5,7 @@
 #include <vector>
 
 #include "utility/file/FileInfo.h"
+#include "utility/TimePoint.h"
 
 class FileSystem
 {
@@ -19,6 +20,7 @@ public:
 	static std::vector<FileInfo> getFileInfosFromPaths(
 		const std::vector<FilePath>& paths, const std::vector<std::string>& fileExtensions);
 
+	static TimePoint getLastWriteTime(const FilePath& filePath);
 	static std::string getTimeStringNow();
 
 	static std::vector<FilePath> getSubDirectories(const FilePath& path);