Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtinfo/DtMmdb/StyleSheet/Feature.h

@@ -0,0 +1,135 @@
+/* $XConsortium: Feature.h /main/4 1996/08/21 15:50:21 drk $ */
+#ifndef _Feature_h
+#define _Feature_h
+
+#include <stream.h>
+
+#ifndef CDE_NEXT
+
+
+#else
+#include "dti_cc/CC_Slist.h"
+#include "dti_cc/cc_povec.h"
+#endif
+
+#include "SymTab.h"
+
+class Element;
+class Expression;
+class FeatureValue;
+class VariableTable;
+class ResolverStackElement ;
+class Symbol;
+
+/*
+#ifndef CDE_NEXT
+class dlist_array<Symbol> ;
+#else
+class dlist_array<Symbol> ;
+#endif
+*/
+
+
+/* **************************************************************
+ * class Feature
+
+ a symbol, value pairing where symbol is the feature name
+ * ************************************************************** */
+
+
+class Feature
+{
+public:
+  Feature(const Symbol &, FeatureValue *);
+  Feature(const Feature &);
+  ~Feature();
+
+
+  const Symbol       &name()	const	{ return f_name ; }
+  const FeatureValue *value()	const	{ return f_value ; }	
+
+  FeatureValue *evaluate() const;
+
+  // destructively modifies f_value 
+  void merge(const Feature &);
+
+  ostream &print(ostream &) const ;
+
+  unsigned int operator==(const Feature&);
+
+private:
+  void assembleChainFeatures(FeatureValue* x);
+
+private:
+  Symbol	f_name ;
+  FeatureValue *f_value;
+
+};
+
+/* **************************************************************
+ * class FeatureSet
+
+ FeatureSet is is a list of features and their values. Features are
+ represented by symbols. Values can be strings, numbers (int or real)
+ or FeatureSet
+ * ************************************************************** */
+
+#ifndef CDE_NEXT
+class FeatureSet : public CC_TPtrSlist<Feature>
+#else
+class FeatureSet : public CC_TPtrSlist<Feature>
+#endif
+{
+public:
+  FeatureSet();
+  FeatureSet(const FeatureSet &); /* copy */
+  FeatureSet(const FeatureSet &,
+	     const FeatureSet &); /* merge */
+  ~FeatureSet();
+
+  void			add(Feature *);
+  const Feature	       *lookup(const Symbol *) const ;
+  const Feature	       *lookup(const Symbol &) const;
+  const Feature	       *lookup(const char *) const;
+
+  // find a chain, eg for "prefix.font.size" use */
+  // deep_lookup("prefix","font","size", 0); 
+  // returns 0 if not found 
+  const Feature	       *deep_lookup(const char * ...) const ;
+  const Feature	       *deep_lookup(const Symbol * ...) const ;
+
+
+#ifndef CDE_NEXT
+  const Feature	       *deep_lookup(const dlist_array<Symbol> &) const ;
+#else
+  const Feature	       *deep_lookup(const dlist_array<Symbol> &) const ;
+#endif
+
+// remve a feature that is specified by a chain
+  void removeFeature(const char * ...) ;
+
+  // returns new feature set with all unresolved expressions resolved
+  FeatureSet *evaluate() const; 
+  // evaluate self and place answers into result_set, returns result set
+  FeatureSet *evaluate(FeatureSet *result_set) const ;
+
+  unsigned int operator == (const FeatureSet &) const ;
+
+  ostream &print(ostream &) const ;
+
+private:
+
+  static unsigned int	f_print_indent_level ;
+  
+};
+
+/* **************************************************************
+ * Printing
+ * ************************************************************** */
+
+ostream &operator << (ostream &o, const Feature &f);
+ostream &operator << (ostream &o, const FeatureSet &f);
+
+
+#endif /* _Feature_h */
+/* DO NOT ADD ANY LINES AFTER THIS #endif */