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#ifndef __CExpander_h
#define __CExpander_h
#include <unistd.h>
#include <stdio.h>
#include <time.h>
#include <qmessagebox.h>
#include "config.h"
#include "StyleConsts.h"
#include "Markups.h"
#include "name.h"
class QPixmap;
class Bkmk;
template<class T>
class CList;
class CCharacterSource
{
public:
virtual void getch(tchar&, CStyle&) = 0;
};
class CExpander
{
protected:
size_t m_homepos;
bool m_continuous;
char* fname;
bool bSuspended;
size_t suspos;
time_t sustime;
public:
virtual void suspend() = 0;
virtual void unsuspend() = 0;
size_t getHome() { return m_homepos; }
CExpander() : m_homepos(0), fname(NULL) {};
virtual ~CExpander() { if (fname != NULL) delete [] fname; };
int openfile(const char *src)
{
bSuspended = false;
fname = strdup(src);
return OpenFile(src);
}
virtual int OpenFile(const char *src) = 0;
virtual unsigned int locate() = 0;
virtual void locate(unsigned int n) = 0;
virtual bool hasrandomaccess() = 0;
virtual void sizes(unsigned long& file, unsigned long& text) = 0;
virtual CList<Bkmk>* getbkmklist() { return NULL; }
virtual void getch(int& ch, CStyle& sty)
{
ch = getch();
sty.unset();
}
virtual int getch() = 0;
virtual bool hyperlink(unsigned int n)
{
locate(n);
return true;
}
virtual MarkupType PreferredMarkup() = 0;
virtual void saveposn(size_t posn) {}
virtual bool forward(size_t& loc) {}
virtual bool back(size_t& loc) {}
virtual bool hasnavigation() { return false; }
virtual unsigned long startSection()
{
return 0;
}
virtual unsigned long endSection()
{
unsigned long file, text;
sizes(file, text);
return text;
}
virtual QPixmap* getPicture(unsigned long tgt) { return NULL; }
void setContinuous(bool _b) { m_continuous = _b; }
virtual void suspend(FILE*& fin)
{
bSuspended = true;
suspos = ftell(fin);
fclose(fin);
fin = NULL;
sustime = time(NULL);
}
virtual void unsuspend(FILE*& fin)
{
if (bSuspended)
{
bSuspended = false;
int delay = time(NULL) - sustime;
if (delay < 10) sleep(10-delay);
fin = fopen(fname, "rb");
for (int i = 0; fin == NULL && i < 5; i++)
{
sleep(5);
fin = fopen(fname, "rb");
}
if (fin == NULL)
{
QMessageBox::warning(NULL, PROGNAME, "Couldn't reopen file");
exit(0);
}
suspos = fseek(fin, suspos, SEEK_SET);
}
}
virtual void setSaveData(unsigned char*& data, unsigned short& len, unsigned char* src, unsigned short srclen)
{
len = srclen;
data = new unsigned char[len];
memcpy(data, src, len);
}
virtual void putSaveData(unsigned char*& src, unsigned short& srclen)
{
if (srclen != 0)
{
qDebug("Don't know what to do with non-zero save data");
}
}
};
#endif
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