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/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* copyright (C) 2006 *
* Umbrello UML Modeller Authors <uml-devel@uml.sf.net> *
***************************************************************************/
#ifndef PETALNODE__H
#define PETALNODE__H
#include <tqstring.h>
#include <tqpair.h>
#include <tqvaluelist.h>
#include <tqstringlist.h>
/**
* Rose petal node - parse tree for model import
*
* A Rose petal node can be of type:
* + object - initialArgs() contains the object type name and further
* initial arguments which depend on the exact object type
* - subordinate attributes are contained in attributes()
* + list - initialArgs() contains the list type name
* - list elements are contained in attributes() but the name
* of each NameValue is empty.
* + value - not represented as a node, instead the stripped down value
* is saved in the value string of the NameValue.
* Example: for the input
* (value Text "This is some text")
* the following is saved in the value string of the NameValue:
* "This is some text"
*
* @author Oliver Kellogg
* Bugs and comments to uml-devel@lists.sf.net or http://bugs.kde.org
*/
class PetalNode {
public:
/**
* Use `string' if it is not empty.
* Use `node' if it is not NULL.
* Either `string' is set, or `node', but never both.
* (Perhaps this should be a union but that is ugly.)
*/
struct StringOrNode {
TQString string;
PetalNode *node;
StringOrNode() { node = 0; }
virtual ~StringOrNode() { }
bool isEmpty() { return (string.isEmpty() && node == 0); }
};
typedef TQPair<TQString, StringOrNode> NameValue;
typedef TQValueList<NameValue> NameValueList;
enum NodeType { nt_object, nt_list };
PetalNode(NodeType nt);
virtual ~PetalNode();
// getters
NodeType type() const;
TQStringList initialArgs() const; // name and other initial args
TQString name() const; // convenience function: equal to initialArgs().first()
NameValueList attributes() const;
// setters
//void setType(NodeType nt); see constructor
void setInitialArgs(const TQStringList& args);
void setAttributes(NameValueList vl);
// utilities
/**
* Find an attribute by name.
* @return The value of the attribute. StringOrNode::isEmpty() returns true
* if the name could not be found.
*/
StringOrNode findAttribute(const TQString& name) const;
private:
NodeType m_type;
TQStringList m_initialArgs;
NameValueList m_attributes;
};
#endif
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