/*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _DOCSEQ_H_INCLUDED_
#define _DOCSEQ_H_INCLUDED_
/* @(#$Id: docseq.h,v 1.11 2007-01-19 15:22:50 dockes Exp $ (C) 2004 J.F.Dockes */
#include <string>
#include <list>
#include <vector>
#ifndef NO_NAMESPACES
using std::string;
using std::list;
using std::vector;
#endif
#include "rcldoc.h"
// A result list entry.
struct ResListEntry {
Rcl::Doc doc;
int percent;
string subHeader;
ResListEntry() : percent(0) {}
};
/** Interface for a list of documents coming from some source.
The result list display data may come from different sources (ie:
history or Db query), and be post-processed (DocSeqSorted).
*/
class DocSequence {
public:
DocSequence(const string &t) : m_title(t) {}
virtual ~DocSequence() {}
/** Get document at given rank.
*
* @param num document rank in sequence
* @param doc return data
* @param percent this will be updated with the percentage of relevance, if
* available, depending on the type of sequence. Return -1 in there
* to indicate that the specified document data is
* unavailable but that there may be available data further
* in the sequence
* @param sh subheader to display before this result (ie: date change
* inside history)
* @return true if ok, false for error or end of data
*/
virtual bool getDoc(int num, Rcl::Doc &doc, int *percent, string *sh = 0)
= 0;
/** Get next page of documents. This accumulates entries into the result
* list (doesn't reset it). */
virtual int getSeqSlice(int offs, int cnt, vector<ResListEntry>& result);
/** Get abstract for document. This is special because it may take time.
* The default is to return the input doc's abstract fields, but some
* sequences can compute a better value (ie: docseqdb) */
virtual string getAbstract(Rcl::Doc& doc) {
return doc.abstract;
}
/** Get estimated total count in results */
virtual int getResCnt() = 0;
/** Get title for result list */
virtual string title() {return m_title;}
/** Get description for underlying query */
virtual string getDescription() = 0;
/** Get search terms (for highlighting abstracts). Some sequences
* may have no associated search terms. Implement this for them. */
virtual bool getTerms(vector<string>& terms,
vector<vector<string> >& groups,
vector<int>& gslks) const {
terms.clear(); groups.clear(); gslks.clear(); return true;
}
private:
string m_title;
};
#endif /* _DOCSEQ_H_INCLUDED_ */