File indexing completed on 2024-04-14 04:48:54

 /*
     This file belong to the KMPlayer project, a movie player plugin for Konqueror
     SPDX-FileCopyrightText: 2009 Koos Vriezen <koos.vriezen@gmail.com>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #ifndef _KMPLAYER_EXPRESSION_H_
 #define _KMPLAYER_EXPRESSION_H_
 
 #include "kmplayerplaylist.h"
 
 namespace KMPlayer {
 
 class NodeValue {
 public:
     NodeValue (Node *n, Attribute *a=nullptr) : node (n), attr (a) {}
     NodeValue (const QString &s) : node (nullptr), attr (nullptr), string (s) {}
 
     QString value () const;
     bool operator ==(const NodeValue& v) const {
         return (node && node == v.node && attr == v.attr)
             || (!node && string == v.string);
     }
 
     Node *node;
     Attribute *attr;
     QString string;
 };
 
 class ExprIterator;
 
 class Expression : public VirtualVoid {
 public:
     class iterator {
         mutable ExprIterator* iter;
     public:
         iterator(ExprIterator* it=nullptr) : iter(it) {}
         iterator(const iterator& it) : iter(it.iter) { it.iter = nullptr; }
         ~iterator();
         iterator& operator =(const iterator& it);
         bool operator ==(const iterator& it) const;
         bool operator !=(const iterator& it) const { return !(*this == it); }
         iterator& operator ++();
         NodeValue& operator*();
         NodeValue* operator->();
     };
     virtual bool toBool () const = 0;
     virtual int toInt () const = 0;
     virtual float toFloat () const = 0;
     virtual QString toString () const = 0;
     virtual iterator begin() const = 0;
     virtual iterator end() const = 0;
     virtual void setRoot (Node *root) = 0;
 };
 
 Expression* evaluateExpr(const QByteArray& expr, const QString& root = QString());
 
 }
 
 #endif