Make debug messages more readable

Shorten the file names output by LYXERR so that they start right after /src/.

src/support/debug.cpp

@@ -14,10 +14,11 @@
 
 #include "support/convert.h"
 #include "support/debug.h"
+#include "support/FileName.h"
 #include "support/gettext.h"
 #include "support/lstrings.h"
-#include "support/FileName.h"
 #include "support/ProgressInterface.h"
+#include "support/regex.h"
 
 #include <iostream>
 #include <iomanip>
@@ -197,13 +198,29 @@ void LyXErr::endl()
 }
 
 
+char const * LyXErr::stripName(char const * n)
+{
+	string const name = n;
+	// find the last occurence of /src/ in name
+	static regex re("[\\/]src[\\/]");
+	string::const_iterator const begin = name.begin();
+	string::const_iterator it = begin;
+	string::const_iterator const end = name.end();
+	smatch results;
+	while (regex_search(it, end, results, re)) {
+		it = results[0].second;
+	}
+	return n + std::distance(begin, it);
+}
+
+
 // It seems not possible to instantiate operator template out of class body
 template<class T>
 LyXErr & toStream(LyXErr & l, T t)	
 {
 	if (l.enabled()){
 		l.stream() << t;
-                if (l.secondEnabled()) {
+		if (l.secondEnabled()) {
 			l.secondStream() << t;
 			ProgressInterface::instance()->lyxerrFlush();
 		}

src/support/debug.h

@@ -171,6 +171,9 @@ public:
 	/// Returns true if t is part of the current debug level
 	bool debugging(Debug::Type t = Debug::ANY) const;
 
+	///
+	static char const * stripName(char const *);
+
 private:
 	/// The current debug level
 	Debug::Type dt_;
@@ -208,7 +211,7 @@ extern LyXErr lyxerr;
 #	include <boost/current_function.hpp>
 #	define CURRENT_POSITION BOOST_CURRENT_FUNCTION ": "
 #else
-# define CURRENT_POSITION __FILE__ << "(" << __LINE__ << "): "
+# define CURRENT_POSITION lyx::LyXErr::stripName(__FILE__) << " (" << __LINE__ << "): "
 #endif
 
 #define LYXERR(type, msg) \

status.20x

@@ -126,6 +126,8 @@ What's new
 
 - Remove annoying startup debug message.
 
+- Shorten source file names in debug messages.
+
 - Fix display of file names that contain many non-ascii characters.