[LyX/2.3-staging] When a counter is stepped, reset recursively all slaves

[Jean-Marc Lasgouttes]

commit 22198302dfab2073def56c95d9a1574f540f6f85
Author: Jean-Marc Lasgouttes <lasgout...@lyx.org>
Date:   Mon Apr 11 12:00:19 2016 +0200

    When a counter is stepped, reset recursively all slaves
    
    Fixes bug #10063.

diff --git a/src/Counters.cpp b/src/Counters.cpp
index fe26040..0b17aa1 100644
--- a/src/Counters.cpp
+++ b/src/Counters.cpp
@@ -265,6 +265,19 @@ int Counters::value(docstring const & ctr) const
 }
 
 
+void Counters::resetSlaves(docstring const & ctr)
+{
+       CounterList::iterator it = counterList_.begin();
+       CounterList::iterator const end = counterList_.end();
+       for (; it != end; ++it) {
+               if (it->second.master() == ctr) {
+                       it->second.reset();
+                       resetSlaves(it->first);
+               }
+       }
+}
+
+
 void Counters::step(docstring const & ctr, UpdateType utype)
 {
        CounterList::iterator it = counterList_.find(ctr);
@@ -280,13 +293,8 @@ void Counters::step(docstring const & ctr, UpdateType 
utype)
                counter_stack_.pop_back();
                counter_stack_.push_back(ctr);
        }
-       it = counterList_.begin();
-       CounterList::iterator const end = counterList_.end();
-       for (; it != end; ++it) {
-               if (it->second.master() == ctr) {
-                       it->second.reset();
-               }
-       }
+
+       resetSlaves(ctr);
 }
 
 
diff --git a/src/Counters.h b/src/Counters.h
index ce122c4..4ba0d00 100644
--- a/src/Counters.h
+++ b/src/Counters.h
@@ -128,10 +128,10 @@ public:
        void addto(docstring const & ctr, int val);
        ///
        int value(docstring const & ctr) const;
-       /// Increment by one counter named by arg, and zeroes slave
+       /// Reset recursively all the counters that are slaves of the one named 
by \c ctr.
+       void resetSlaves(docstring const & ctr);
+       /// Increment by one counter named by \c ctr, and zeroes slave
        /// counter(s) for which it is the master.
-       /// Sub-slaves are not zeroed! That happens at slave's first 
-       /// step 0->1. Seems to be sufficient.
        /// \param utype determines whether we track the counters.
        void step(docstring const & ctr, UpdateType utype);
        /// Reset all counters, and all the internal data structures