merge dasher which has been introduced in BRANCH first (wtf?) into HEAD

1 files changed, 123 insertions, 0 deletions

diff --git a/inputmethods/dasher/LanguageModel.h b/inputmethods/dasher/LanguageModel.h
new file mode 100644
index 0000000..8ffe100
--- a/dev/null
+++ b/inputmethods/dasher/LanguageModel.h
@@ -0,0 +1,123 @@
+// LanguageModel.h
+//
+/////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2001-2002 David Ward
+//
+/////////////////////////////////////////////////////////////////////////////
+
+// Abstract language model class
+// See PPMModel for an example implementation
+
+// Contexts are indentified by a unique unsigned integer
+
+#ifndef __LanguageModel_h__
+#define __LanguageModel_h__
+
+#include "MSVC_Unannoy.h"
+#include <vector>
+#include <string>
+
+#include "Alphabet.h"
+#include "Context.h"
+
+namespace Dasher {class CLanguageModel;}
+class Dasher::CLanguageModel
+{
+public:
+        CLanguageModel(CAlphabet* Alphabet, int Normalization);
+
+        // Interface for the Dasher code
+        // --------------------------------------------------------------------------
+        class CNodeContext {
+        public:
+                CNodeContext() {};
+                virtual ~CNodeContext() {};
+        };
+        
+        // return the model's normalization - what the probabilities sum to
+        const int normalization() const { return m_iNorm;}
+        
+        CNodeContext* GetRootNodeContext();
+        CNodeContext* CloneNodeContext(CNodeContext* NodeContext);
+        void ReleaseNodeContext(CNodeContext* NodeContext);
+        void EnterNodeSymbol(CNodeContext* NodeContext, symbol Symbol);
+        void LearnNodeSymbol(CNodeContext* NodeContext, symbol Symbol);
+        void EnterText(CNodeContext* NodeContext, std::string TheText);
+        void LearnText(CNodeContext* NodeContext, std::string* TheText, bool IsMore);
+        bool GetNodeProbs(CNodeContext* Context, std::vector<symbol> &NewSymbols,
+                std::vector<unsigned int> &Groups, std::vector<unsigned int> &Probs, double AddProb);
+        
+        // Alphabet pass-through functions for widely needed information
+        symbol GetSpaceSymbol() {return m_Alphabet->GetSpaceSymbol();}
+        
+        int GetColour(int character);
+
+protected:
+        int GetNumberModelChars() {return m_Alphabet->GetNumberSymbols();}
+        
+        // Generic language model functions to be implemented 
+        // --------------------------------------------------------------------------
+        typedef unsigned int modelchar;
+        
+        // return the id for the root context:
+        virtual CContext* GetRootContext()=0;
+        // clone a context and return the new id:
+        virtual CContext* CloneContext(CContext*)=0;
+        // delete a context:
+        virtual void ReleaseContext(CContext*)=0;
+        // diagnostic info:
+        virtual void dump()=0;
+        // add character to the language model:
+        virtual void LearnSymbol(CContext* Context, modelchar Symbol)=0;
+        // update context with a character:
+        virtual void EnterSymbol(CContext* context, modelchar Symbol)=0;
+        // get the probability distrubution at the given context:
+        virtual bool GetProbs(CContext* Context, std::vector<unsigned int> &Probs, double AddProb)=0;
+        
+private:
+        CAlphabet *m_Alphabet;
+        int m_iModelChars; // number of charater in the model 1...ModelChars
+        int m_iNorm;       // normalization of probabilities
+};
+
+using namespace Dasher;
+
+///////////////////////////////////////////////////////////////////
+
+inline CLanguageModel::CNodeContext* CLanguageModel::GetRootNodeContext()
+{
+        return (CNodeContext*) GetRootContext();
+}
+
+///////////////////////////////////////////////////////////////////
+
+inline CLanguageModel::CNodeContext* CLanguageModel::CloneNodeContext(CNodeContext* NodeContext)
+{
+        return (CNodeContext*) CloneContext((CContext*) NodeContext);
+}
+
+///////////////////////////////////////////////////////////////////
+
+inline void CLanguageModel::ReleaseNodeContext(CNodeContext* NodeContext)
+{
+        ReleaseContext((CContext*) NodeContext);
+}
+
+///////////////////////////////////////////////////////////////////
+
+inline void CLanguageModel::EnterNodeSymbol(CNodeContext* NodeContext, symbol Symbol)
+{
+        EnterSymbol((CContext*) NodeContext, (modelchar) Symbol);
+}
+
+///////////////////////////////////////////////////////////////////
+
+inline void CLanguageModel::LearnNodeSymbol(CNodeContext* NodeContext, symbol Symbol)
+{
+        LearnSymbol((CContext*) NodeContext, (modelchar) Symbol);
+}
+
+
+
+#endif /* #ifndef __LanguageModel_h__ */