Preparations to extract possible completions from globit code

For #297

src/globit.c

@@ -35,6 +35,8 @@
  * Arguments:
  *    [in] const char *pattern
  *    [out] char **result
+ *    [in] void (*callback)(const void *, const char **, unsigned) -- function to run in case there are multiple results (with count) and user specified parameter (first argument)
+ *    [int] const void* cback_user_parm -- first parameter to callback
  * Return value:
  *    (int) number of matches
  *   + if -1: an error occurred; *result is the error string (or NULL)
@@ -108,7 +110,8 @@ static bool my_glob_pattern_p(const char *pat, int quote)
 /* main function */
 
 int
-globit_best(const char *pattern_, char **result)
+globit_best(const char *pattern_, char **result,
+        void(*callback)(const void *, const char * const *, unsigned cnt), const void* cback_user_parm)
 {
 	char c, *cp, **results = NULL;
 	size_t z, nresults = 0;
@@ -231,6 +234,7 @@ globit_best(const char *pattern_, char **result)
 			*result = globit_escape(glob_block.gl_pathv[0]);
 			break;
 		default:
+		    if(callback) callback(cback_user_parm, glob_block.gl_pathv, i);
 			z = globit_pfxlen(glob_block.gl_pathv, i);
 			if (z == 0) {
 				i = 0;
@@ -288,6 +292,7 @@ globit_best(const char *pattern_, char **result)
 	case 0:
 		goto ok_out;
 	default:
+        if(callback) callback(cback_user_parm, results, i);
 		z = globit_pfxlen(results, i);
 		if (z == 0) {
 			i = 0;

src/globit.h

@@ -5,7 +5,8 @@
 extern "C" {
 #endif
 
-extern int globit_best(const char *, char **);
+extern int globit_best(const char *, char **,
+        void(*callback)(const void *, const char * const *, unsigned), const void* cback_user_parm);
 
 #ifdef __cplusplus
 }

src/yinput.cc

@@ -55,7 +55,7 @@ YInputLine::~YInputLine() {
 
 void YInputLine::setText(const ustring &text) {
     fText = text;
-    markPos = curPos = leftOfs = 0;
+    markPos = leftOfs = 0;
     curPos = fText.length();
     limit();
     repaint();
@@ -679,8 +679,10 @@ void YInputLine::autoScroll(int delta, const XMotionEvent *motion) {
 
 void YInputLine::complete() {
     char* res = 0;
-    if (1 <= globit_best(cstring(fText), &res))
+    if (1 <= globit_best(cstring(fText), &res, 0, 0))
         setText(res);
+    // FIXME: even for max. prefix the text gets marked like for a full match;
+    // that might be intended or might be a bug in limit() or paint()
     free(res);
 }