91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef _DOCSEQ_H_INCLUDED_
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#define _DOCSEQ_H_INCLUDED_
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/* @(#$Id: docseq.h,v 1.7 2006-02-21 12:52:48 dockes Exp $ (C) 2004 J.F.Dockes */
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#include "rcldb.h"
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#include "history.h"
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/** Interface for a list of documents coming from some source.
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The result list display data may come from different sources (ie:
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history or Db query). We have an interface to make things cleaner.
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*/
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class DocSequence {
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public:
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DocSequence(const std::string &t) : m_title(t) {}
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virtual ~DocSequence() {}
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/** Get document at given rank
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*
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* @param num document rank in sequence
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* @param doc return data
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* @param percent this will be updated with the percentage of relevance, if
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* available, depending on the type of sequence. Return -1 in there
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* to indicate that the specified document data is
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* unavailable but that there may be available data further
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* in the sequence
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* @param sh subheader to display before this result (ie: date change
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* inside history)
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* @return true if ok, false for error or end of data
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*/
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virtual bool getDoc(int num, Rcl::Doc &doc, int *percent, string *sh = 0)
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= 0;
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virtual int getResCnt() = 0;
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virtual std::string title() {return m_title;}
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private:
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std::string m_title;
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};
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/** A DocSequence from a Db query (there should be one active for this
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to make sense */
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class DocSequenceDb : public DocSequence {
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public:
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DocSequenceDb(Rcl::Db *d, const std::string &t) :
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DocSequence(t), m_db(d), m_rescnt(-1)
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{}
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virtual ~DocSequenceDb() {}
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virtual bool getDoc(int num, Rcl::Doc &doc, int *percent, string * = 0);
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virtual int getResCnt();
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private:
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Rcl::Db *m_db;
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int m_rescnt;
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};
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/** A DocSequence coming from the history file */
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class DocSequenceHistory : public DocSequence {
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public:
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DocSequenceHistory(Rcl::Db *d, RclDHistory *h, const std::string &t)
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: DocSequence(t), m_db(d), m_hist(h), m_prevnum(-1), m_prevtime(-1) {}
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virtual ~DocSequenceHistory() {}
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virtual bool getDoc(int num, Rcl::Doc &doc, int *percent, string *sh = 0);
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virtual int getResCnt();
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private:
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Rcl::Db *m_db;
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RclDHistory *m_hist;
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int m_prevnum;
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long m_prevtime;
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std::list<RclDHistoryEntry> m_hlist;
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std::list<RclDHistoryEntry>::const_iterator m_it;
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};
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#endif /* _DOCSEQ_H_INCLUDED_ */
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