tstring.h

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//
// C++ Interface: tstring
//
// Description: 
//
// Copyright: See COPYING file that comes with this distribution
//
//

#ifndef __TAGSTRING__H
#define __TAGSTRING__H

#include <qstring.h>
#include <qvaluelist.h>
#include <utility>
#include <cassert>
template <class T>
class TagString_t
{
	QString str;
	typedef QValueList<std::pair<uint,T> > taglist; // may change
	taglist tags;
public:
	TagString_t(const QString& s) : str(s) {}
	TagString_t() {}
	bool isSimple() const { return tags.empty(); }
	const QString& string() const { return str; }
	unsigned length() const { return str.length(); }
	TagString_t mid(unsigned idx,unsigned len=~0) const;
	TagString_t left(unsigned) const;
	TagString_t right(unsigned) const;
	void insert(uint,const QString& s);
	int find ( QChar c, int index = 0, bool cs = TRUE ) const {
		return str.find(c,index,cs);
	}
	TagString_t& operator+=(const TagString_t& s);
	typename taglist::const_iterator tagsBegin() const { return tags.begin(); }
	typename taglist::const_iterator tagsEnd() const { return tags.end(); }
	typename taglist::iterator tagsBegin() { return tags.begin(); }
	typename taglist::iterator tagsEnd() { return tags.end(); }
	void insertTag(uint pos,const T& t);
	void eraseTag(const typename taglist::iterator& which) { tags.erase(which); }
/*	void insert(uint idx,const QString&);
	void insert(uint idx,const char*);
	void addTag(uint);
	void remove(uint start,uint len);*/
};

template <class T>
TagString_t<T> TagString_t<T>::mid(unsigned idx,unsigned len) const
{
	TagString_t ret(str.mid(idx,len));
	unsigned max=idx+len;
	if(max<idx) max=~0;
	for(typename taglist::const_iterator it=tags.begin(),end=tags.end();it!=end;++it) {
		if((*it).first>=idx && (*it).first<max)
			ret.tags.push_back(*it);
	}
	return ret;
}

template <class T>
TagString_t<T> TagString_t<T>::left(unsigned len) const
{
	TagString_t ret(str.left(len));
	for(typename taglist::const_iterator it=tags.begin(),end=tags.end();it!=end;++it) {
		if((*it).first<len)
			ret.tags.push_back(*it);
	}
	return ret;
}

template <class T>
TagString_t<T> TagString_t<T>::right(unsigned len) const
{
	TagString_t ret(str.right(len));
	for(typename taglist::const_iterator it=tags.begin(),end=tags.end();it!=end;++it) {
		if((*it).first>=str.length()-len)
			ret.tags.push_back(*it);
	}
	return ret;
}

template <class T>
void TagString_t<T>::insert(uint idx,const QString& s)
{
	str.insert(idx,s);
	const unsigned disp=s.length();
	for(typename taglist::iterator it=tags.begin(),end=tags.end();it!=end;++it) {
		if((*it).first>=idx)
			(*it).first+=disp;
	}
}

template <class T>
TagString_t<T>& TagString_t<T>::operator+=(const TagString_t& s)
{
	str+=s.str;
	const unsigned disp=length();
	for(typename taglist::const_iterator it=s.tags.begin(),end=s.tags.end();it!=end;++it) {
		tags.push_back(make_pair((*it).first+disp,(*it).second));
	}
	return *this;
}

template <class T>
void TagString_t<T>::insertTag(uint pos,const T& t)
{
	assert(pos<=length());
	tags.push_back(make_pair(pos,t));
}

#endif