Arrange so we can now open the parent of a document (e.g. chm file instead of temp copy of html page inside chm), even when the parent is itself embedded in an archive

src/internfile/internfile.cpp

@@ -126,6 +126,16 @@ bool FileInterner::getEnclosing(const string &url, const string &ipath,
     return true;
 }
 
+string FileInterner::getLastIpathElt(const string& ipath)
+{
+    string::size_type sep;
+    if ((sep =  ipath.find_last_of(cstr_isep)) != string::npos) {
+	return ipath.substr(sep + 1);
+    } else {
+	return ipath;
+    }
+}
+
 // Uncompress input file into a temporary one, by executing the appropriate
 // script.
 static bool uncompressfile(RclConfig *conf, const string& ifn, 

src/internfile/internfile.h

@@ -83,6 +83,9 @@ class FileInterner {
     static bool getEnclosing(const string &url, const string &ipath,
 			     string &eurl, string &eipath, string& udi);
 
+    /** Return last element in ipath, like basename */
+    static std::string getLastIpathElt(const std::string& ipath);
+
     /** Constructors take the initial step to preprocess the data object and
      *  create the top filter */