X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2FDEVEL%2Fmathml_editor%2Fsrc%2FAPushParser.hh;h=3a3aa8842c350092c0aecd84577537b4f5724c93;hb=387aeebf96181c051b7f527a0901b173cfcdf194;hp=c7989614eaf4cf2feecb7043fb300dbda5c7206e;hpb=2f94240bc382ca43017f31b0852f1717fe18090b;p=helm.git

diff --git a/helm/DEVEL/mathml_editor/src/APushParser.hh b/helm/DEVEL/mathml_editor/src/APushParser.hh
index c7989614e..3a3aa8842 100644
--- a/helm/DEVEL/mathml_editor/src/APushParser.hh
+++ b/helm/DEVEL/mathml_editor/src/APushParser.hh
@@ -24,19 +24,30 @@
 #ifndef __APushParser_hh__
 #define __APushParser_hh__
 
+#include <string>
+
 class APushParser
 {
 public:
-  APushParser(class ALogger& l) : logger(l), factory(0) { };
-  APushParser(class ALogger& l, class AMathMLFactory& f) : logger(l), factory(&f) { };
-
+  APushParser(class ALogger& l) : logger(l), factory(0), freeze_level(0) { };
+  APushParser(class ALogger& l, class AMathMLFactory& f) : logger(l), factory(&f), freeze_level(0) { };
   virtual ~APushParser() { };
-  virtual void push(const TToken&) = 0;
+
+  virtual void reset(void);
+  virtual void push(const class TToken&) = 0;
+  virtual std::string drop(void) = 0;
   virtual void setCursorHint(const std::string&) = 0;
 
+  virtual bool freeze(void);
+  virtual bool thaw(void);
+  bool frozen(void) const { return freeze_level > 0; };
+
 protected:
   class ALogger& logger;
   class AMathMLFactory* factory;
+
+private:
+  unsigned freeze_level;
 };
 
 #endif // __APushParser_hh__