158 lines
4.0 KiB
C++
158 lines
4.0 KiB
C++
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: Feature.h /main/4 1996/08/21 15:50:21 drk $ */
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#ifndef _Feature_h
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#define _Feature_h
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#include <sstream>
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#ifndef CDE_NEXT
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#else
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#include "dti_cc/CC_Slist.h"
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#include "dti_cc/cc_povec.h"
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#endif
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#include "SymTab.h"
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class Element;
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class Expression;
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class FeatureValue;
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class VariableTable;
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class ResolverStackElement ;
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class Symbol;
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/*
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#ifndef CDE_NEXT
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class dlist_array<Symbol> ;
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#else
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class dlist_array<Symbol> ;
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#endif
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*/
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/* **************************************************************
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* class Feature
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a symbol, value pairing where symbol is the feature name
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* ************************************************************** */
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class Feature
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{
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public:
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Feature(const Symbol &, FeatureValue *);
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Feature(const Feature &);
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~Feature();
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const Symbol &name() const { return f_name ; }
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const FeatureValue *value() const { return f_value ; }
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FeatureValue *evaluate() const;
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// destructively modifies f_value
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void merge(const Feature &);
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ostream &print(ostream &) const ;
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unsigned int operator==(const Feature&);
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private:
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void assembleChainFeatures(FeatureValue* x);
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private:
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Symbol f_name ;
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FeatureValue *f_value;
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};
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/* **************************************************************
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* class FeatureSet
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FeatureSet is is a list of features and their values. Features are
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represented by symbols. Values can be strings, numbers (int or real)
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or FeatureSet
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* ************************************************************** */
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#ifndef CDE_NEXT
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class FeatureSet : public CC_TPtrSlist<Feature>
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#else
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class FeatureSet : public CC_TPtrSlist<Feature>
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#endif
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{
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public:
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FeatureSet();
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FeatureSet(const FeatureSet &); /* copy */
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FeatureSet(const FeatureSet &,
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const FeatureSet &); /* merge */
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virtual ~FeatureSet();
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void add(Feature *);
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const Feature *lookup(const Symbol *) const ;
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const Feature *lookup(const Symbol &) const;
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const Feature *lookup(const char *) const;
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// find a chain, eg for "prefix.font.size" use */
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// deep_lookup("prefix","font","size", 0);
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// returns 0 if not found
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const Feature *deep_lookup(const char * ...) const ;
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const Feature *deep_lookup(const Symbol * ...) const ;
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#ifndef CDE_NEXT
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const Feature *deep_lookup(const dlist_array<Symbol> &) const ;
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#else
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const Feature *deep_lookup(const dlist_array<Symbol> &) const ;
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#endif
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// remve a feature that is specified by a chain
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void removeFeature(const char * ...) ;
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// returns new feature set with all unresolved expressions resolved
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FeatureSet *evaluate() const;
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// evaluate self and place answers into result_set, returns result set
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FeatureSet *evaluate(FeatureSet *result_set) const ;
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unsigned int operator == (const FeatureSet &) const ;
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ostream &print(ostream &) const ;
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private:
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static unsigned int f_print_indent_level ;
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};
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/* **************************************************************
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* Printing
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* ************************************************************** */
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ostream &operator << (ostream &o, const Feature &f);
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ostream &operator << (ostream &o, const FeatureSet &f);
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#endif /* _Feature_h */
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/* DO NOT ADD ANY LINES AFTER THIS #endif */
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