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#ifndef POPULARURLS_H
#define POPULARURLS_H
#include <tqobject.h>
#include <kurl.h>
#include <tqdict.h>
#include <kdialogbase.h>
// the class holds a list of most popular links in a dual data structure
// * linked list, with head and tail: for fast append/prepend support
// * dictionary that maps urls to list nodes: to save the need to iterate
// over the list in order to find the correct node for each new url
//
// also, the class holds a maximum number of urls. two variables affect this:
// * maxUrls - the num. of urls the user can see
// * hardLimit - the actual number of urls kept.
// when the number of urls reaches hardLimit, a garbage collection is done and
// the bottom (hardLimit-maxUrls) entries are removed from the list
typedef struct _UrlNode* UrlNodeP;
typedef struct _UrlNode {
UrlNodeP prev;
KURL url;
int rank;
UrlNodeP next;
} UrlNode;
class PopularUrlsDlg;
class PopularUrls : public TQObject {
Q_OBJECT
public:
PopularUrls(TQObject *parent = 0, const char *name = 0);
~PopularUrls();
void save();
void load();
void addUrl(const KURL& url);
KURL::List getMostPopularUrls(int max);
public slots:
void showDialog();
protected:
// NOTE: the following methods append/insert/remove a node to the list
// but NEVER free memory or allocate memory!
void appendNode(UrlNodeP node);
void insertNode(UrlNodeP node, UrlNodeP after);
void removeNode(UrlNodeP node);
void relocateIfNeeded(UrlNodeP node);
void clearList();
void dumpList();
void decreaseRanks();
private:
UrlNodeP head, tail;
TQDict<UrlNode> ranks; // actually holds UrlNode*
int count;
static const int maxUrls = 30;
PopularUrlsDlg *dlg;
};
class TDEListView;
class TDEListViewSearchLine;
class PopularUrlsDlg: public KDialogBase {
Q_OBJECT
public:
PopularUrlsDlg();
~PopularUrlsDlg();
void run(KURL::List list); // use this to open the dialog
inline int result() const { return selection; } // returns index 0 - topmost, or -1
protected slots:
void slotSearchReturnPressed(const TQString&);
void slotItemSelected(TQListViewItem *it);
private:
TDEListView *urls;
TDEListViewSearchLine *search;
int selection;
};
#endif
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