Add callback for textsplit to report line breaks. Use it to implement looking up the first line where a term appears to use with a %l spec for executing a viewer

src/query/docseq.h

@@ -111,6 +111,9 @@ public:
     virtual int getFirstMatchPage(Rcl::Doc&, std::string&) {
         return -1;
     }
+    virtual int getFirstMatchLine(const Rcl::Doc&, const std::string&) {
+        return 1;
+    }
     /** Get duplicates. */
     virtual bool docDups(const Rcl::Doc&, std::vector<Rcl::Doc>&) {
         return false;

src/query/docseqdb.cpp

@@ -126,6 +126,17 @@ int DocSequenceDb::getFirstMatchPage(Rcl::Doc &doc, string& term)
     return -1;
 }
 
+int DocSequenceDb::getFirstMatchLine(const Rcl::Doc &doc, const string& term)
+{
+    std::unique_lock<std::mutex> locker(o_dblock);
+    if (!setQuery())
+        return false;
+    if (m_q->whatDb()) {
+        return m_q->getFirstMatchLine(doc, term);
+    }
+    return 1;
+}
+
 list<string> DocSequenceDb::expand(Rcl::Doc &doc)
 {
     std::unique_lock<std::mutex> locker(o_dblock);

src/query/docseqdb.h

@@ -43,6 +43,7 @@ public:
 
     virtual bool getAbstract(Rcl::Doc &doc, std::vector<std::string>&) override;
     virtual int getFirstMatchPage(Rcl::Doc&, std::string& term) override;
+    virtual int getFirstMatchLine(const Rcl::Doc&, const std::string& term) override;
     virtual bool docDups(const Rcl::Doc& doc, std::vector<Rcl::Doc>& dups)
         override;
     virtual std::string getDescription() override;