suggest alternate spellings if no results

src/query/docseq.h

@@ -123,6 +123,11 @@ class DocSequence {
     {
 	terms.clear(); groups.clear(); gslks.clear(); return true;
     }
+    /** Get user-input terms (before stemming etc.) */
+    virtual void getUTerms(vector<string>& terms)
+    {
+	terms.clear(); 
+    }
     virtual list<string> expand(Rcl::Doc &) {return list<string>();}
 
     /** Optional functionality. Yeah, not nice */
@@ -159,6 +164,10 @@ public:
     {
 	return m_seq->getTerms(terms, groups, gslks);
     }
+    virtual void getUTerms(vector<string>& terms)
+    {
+	m_seq->getUTerms(terms);
+    }
 
 protected:
     RefCntr<DocSequence>    m_seq;

src/query/docseqdb.cpp

@@ -45,6 +45,11 @@ bool DocSequenceDb::getTerms(vector<string>& terms,
     return m_fsdata->getTerms(terms, groups, gslks);
 }
 
+void DocSequenceDb::getUTerms(vector<string>& terms)
+{
+    m_sdata->getUTerms(terms);
+}
+
 string DocSequenceDb::getDescription() 
 {
     return m_fsdata->getDescription();

src/query/docseqdb.h

@@ -35,6 +35,7 @@ class DocSequenceDb : public DocSequence {
     virtual bool getTerms(vector<string>& terms, 
 			  vector<vector<string> >& groups, 
 			  vector<int>& gslks);
+    virtual void getUTerms(vector<string>& terms);
     virtual string getAbstract(Rcl::Doc &doc);
     virtual bool getEnclosing(Rcl::Doc& doc, Rcl::Doc& pdoc);
     virtual string getDescription();

src/query/reslistpager.cpp

@@ -98,6 +98,22 @@ void ResListPager::displayPage()
 
     if (pageEmpty()) {
 	chunk += trans("<p><b>No results found</b><br>");
+        vector<string>uterms;
+        m_docSource->getUTerms(uterms);
+        if (!uterms.empty()) {
+            vector<string> spellings;
+            suggest(uterms, spellings);
+            if (!spellings.empty()) {
+                chunk += 
+                 trans("<p><i>Alternate spellings (accents suppressed): </i>");
+                for (vector<string>::iterator it = spellings.begin();
+                     it != spellings.end(); it++) {
+                    chunk += *it;
+                    chunk += " ";
+                }
+                chunk += "</p>";
+            }
+        }
     } else {
 	unsigned int resCnt = m_docSource->getResCnt();
 	if (m_winfirst + m_respage.size() < resCnt) {

src/query/reslistpager.h

@@ -67,6 +67,9 @@ public:
     virtual string prevUrl();
     virtual string pageTop() {return string();}
     virtual string iconPath(const string& mtype);
+    virtual void suggest(const vector<string>, vector<string>&sugg) {
+        sugg.clear();
+    }
 private:
     void initall() 
     {