#include "node.h"
#include "string.h"
node::node()
  { 
    pnext=0;
    pfchild=0;
    //cout<<"\nkonstruktor klasy node"<<endl;
  }
node::~node()
  {
    if(pnext)
      delete pnext;
    if(pfchild)
      delete pfchild;
    //cout<<"\ndestruktor klasy node"<<endl;
  }
 
  
node * node::addTail(node * an)
  {
    if(!pnext)
    return pnext=an;
    else 
    return pnext->addTail(an);        
  }

node * node::addChTail(node * an)
  {
   an->settab(tab+1);
   if(!pfchild)
   return pfchild=an;
   else 
   return pfchild->addTail(an);
  }

void node_a::Print()
{
	cout << "a";
	if (pfchild)
		{
		cout << "(";
		pfchild->Print();
		cout << ")";
		}
	if (pnext)
		{
		cout << ",";
		pnext->Print();
		}

}


void node_b::Print()
{
	cout << "b";
	if (pfchild)
		{
		cout << "(";
		pfchild->Print();
		cout << ")";
		}
	if (pnext)
		{
		cout << ",";
		pnext->Print();
		}
}

char* html_item0::settext(char*at)
{
    if(text) delete[]text;
    if(!at) return 0;
    text = new char[strlen(at)+1];
    strcpy(text, at);
    return text;
}

html_item0::html_item0(char *at)
{
    html_item0(); //text = 0
    settext(at);
}

html_item0::~html_item0()
{
    settext(0);
}


void html_item0::Print(){
    for(int i=0;i<tab;i++) cout << "\t";
    if(text)
	cout << text;
    if(pfchild){
	cout << "\n";
	pfchild->Print();
    }
    if(pnext){
	cout << "\n";
	pnext->Print();
    }
}