reader.cxx

一个小的非常好用的电子书阅读器源码

// Program to read Aportis format files on the Agenda VR3
// by $Author: agenda $. Current version $Revision: 1.36 $, $Date: 2001/10/10 19:55:20 $.
// This is a $State: Exp $ version.
// Baseline is $Name: V1_1 $
//
// $Log: reader.cxx,v $
// Revision 1.36  2001/10/10 19:55:20  agenda
// First release candidate with background autogenning.
//
// Revision 1.35  2001/10/10 19:37:40  agenda
// Background autogenning seems to be working - now to tidy it up!
//
// Revision 1.34  2001/10/04 21:29:53  agenda
// First round of "slow and small" bug fixes
//
// Revision 1.33  2001/10/03 19:19:17  agenda
// Slow but small background auto-genning
//
// Revision 1.32  2001/10/02 21:41:11  agenda
// Background autogen
//
// Revision 1.31  2001/09/08 23:08:45  agenda
// Added tight spacing option
//
// Revision 1.30  2001/09/07 14:56:26  agenda
// Improvements to window placement etc.
//
// Revision 1.29  2001/09/06 00:03:41  agenda
// Removed FP version of fl_width, put CBars info info dialogue and
// made the buffdoc and myoutput objects a little more self-contained.
//
// Revision 1.28  2001/09/05 02:22:26  agenda
// Converted myoutput to a widget, added progress bars and some minor bug fixes.
//
// Revision 1.27  2001/09/01 14:30:13  agenda
// Check-in for actual beta-release 1.0a
//
// Revision 1.26  2001/08/30 00:07:06  agenda
// Added filesize info and prepared for next release
//
// Revision 1.25  2001/08/28 10:31:13  agenda
// Version 1.0 beta A
//
// Revision 1.24  2001/08/16 20:23:45  agenda
// First working version with bookmarks
//
// Revision 1.23  2001/08/05 19:14:06  agenda
// Started adding in bookmarks proper
//
// Revision 1.21  2001/07/04 21:16:29  agenda
// Ready for initial release
//
// Revision 1.20  2001/06/19 21:24:57  agenda
// First release candidate
//
// Revision 1.19  2001/06/13 21:06:43  agenda
// Now works reasonably well and quite quickly too!
//
// Revision 1.18  2001/06/10 21:29:53  agenda
// Replaced multiline output with direct drawing of text
//
// Revision 1.17  2001/06/07 23:34:00  agenda
// First working(?) version with Flek and flpda.
//
// Revision 1.16  2001/06/07 21:54:51  agenda
// Changed over to use text rather than Sixpack compression as the third data type.
//
// Revision 1.15  2001/06/07 21:41:47  agenda
// Made a bit more robust!
//
// Revision 1.14  2001/06/07 21:30:00  agenda
// First working version
//
// Revision 1.16  2001/06/01 12:09:55  agenda
// Version which works with ppm
//
// Revision 1.15  2001/05/28 05:09:10  agenda
// Done some restructuring so that plugging in other decompression schemes should be easier.
// Changed the page-up code to be more efficient and more accurate - though it may get messy if there is no formatting
// in the input file as it looks for paragraphs to regain synchronisation.
//
// Still to do:
//   User defined bookmarks
//   Allow some overlap between pages
//   Find
//   Tidy up the page-up code to use a circular array of pointers and a single
//   char* rather than a circular array of char*'s
//   Tidy up the page-up code in general
//
// Revision 1.14  2001/05/26 10:44:43  agenda
// Check-in just prior to some restructuring
//
// Revision 1.13  2001/05/11 05:07:59  agenda
// First attempt to do bookmarks. Works on workstation but fails on Agenda.
//
// Revision 1.12  2001/05/11 03:25:17  agenda
// Corrected a bug when a match overlaps the current position. Added two optional command line arguments to open a particular file at a particuler location at startup.
//
// Revision 1.11  2001/04/29 22:21:36  agenda
// Added a little bit of book-marking but I couldn't get the dbm stuff
// on the Agenda to work.
// Added magnify and reduce and embolden.
//
// Revision 1.10  2001/04/22 21:38:58  agenda
// Removed obsolete tBuf class, made buffers a more realistic size
// and a bit of tidying up.
//
// Revision 1.9  2001/04/22 14:42:47  agenda
// Page up and Page down now working, though page up is approximate and not
// particularly efficient. Most of the stuff is there to allow bookmarks
// but the actual GUI and storage for bookmarks is still TBD.
//
// Currently can use Alt-f to query/set the current position so bookmarks
// can be managed manually, for now.
//
// Revision 1.8  2001/04/21 20:38:00  agenda
// Added some stuff to go to a particular point in the file.
// To get it working properly requires some major changes to
// the decompression stuff so this check-in is just so I
// can revert if I mess up the next set of changes.
//
// Revision 1.7  2001/04/21 08:44:28  agenda
// Tidied up page down a bit.
// Other stuff to do which I left out of my last check-in is to get find working
// (or maybe just remove it)
//
// Revision 1.6  2001/04/21 08:07:00  agenda
// First useable version with buffering.
// Still to do:
//   Enable page-up
//   Bookmarks
//   Allow some overlap between pages
// Currently each page has no text in common with the previous page.
// Normally you would expect the first line of a new page to be the same
// as the last line of the next page. I happen to quite like how it
// (accidentally) works now so I may not change it.
//
// Revision 1.4  2001/04/14 23:05:03  agenda
// Tidied up header and clarified where other headers are quoted.
//
// Revision 1.3  2001/04/14 22:53:16  agenda
// Begun adding in version control info, etc.
//
// Revision 1.2  2001/04/14 22:40:44  agenda
// Improved handling of page-up/down events
//
// Revision 1.1  2001/04/14 21:44:23  agenda
// Initial revision
// ============================================================================
//
static char rcsid[] = "$Id: reader.cxx,v 1.36 2001/10/10 19:55:20 agenda Exp $";
// Decompression based (very heavily) on:
//
// ------------- Begin quoted header -------------
// MakeDoc
// version 2
//
// Compresses text files into a format that is ready to export to a Pilot
// and work with Rick Bram's PilotDOC reader.
//
// Copyright (C) Pat Beirne, 2000.
// Distributable under the GNU General Public License Version 2 or later.
//
// ver 0.6 enforce 31 char limit on database names
// ver 0.7 change header and record0 to structs
// ver 2.0 added category control on the command line
//		changed extensions from .prc to .pdb
// -------------- End quoted header --------------
//
// Remainder based (more loosely) on
//
// ------------- Begin quoted header -------------
// A simple text editor program for the Fast Light Tool Kit (FLTK).
//
// This program is described in Chapter 4 of the FLTK Programmer's Guide.
//
// Copyright 1998-2000 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "[e-mail]".
// -------------- End quoted header --------------
//
// Note that it is unlikely that any bug found in this program
// will be relevant to the fltk organisation as it will almost
// certainly be one of mine.

#include <stdio.h>			// Standard library files
#ifdef _SLOW
#include <unistd.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <errno.h>

//#include <string>

#ifdef AGENDA
#include <flpda/Widget_Factory.h>
#include <Flek/Fl_App_Window.H>
#endif

#include <FL/Fl.H>			// Main FLTK header file
#include <FL/Fl_Group.H>		// Fl_Group header file
#include <FL/Fl_Window.H>		// Fl_Window header file
#include <FL/fl_ask.H>			// FLTK convenience functions
#if defined(RAW) || !defined(AGENDA)
#include <FL/fl_file_chooser.H>
#else
//#include "fl_ag_file_chooser.H"		// FLTK file chooser
#include "my_fl_file_chooser.H"		// FLTK file chooser
#endif
#include <FL/Fl_Menu_Bar.H>		// Fl_Menu_Bar header file
#include <FL/Fl_Input.H>		// Fl_Input header file
#ifdef AGENDA
#include <flpda/Fl_Paged_Select_Browser.H>	// Fl_Multiline_Input header file
#else
#include <FL/Fl_Select_Browser.H>	// Fl_Multiline_Input header file
#endif
#include <FL/Fl_Multiline_Output.H>	// Fl_Multiline_Input header file
#include <FL/Fl_Button.H>		// Fl_Button header file
#include <FL/Fl_Return_Button.H>	// Fl_Return_Button header file
#include <FL/Fl_Int_Input.H>
#include <FL/fl_draw.H>
#include <FL/filename.H>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef USEBKMKS
#ifdef WS
#include <db1/db.h>
#else
#include <db.h>
#endif
#endif
#include "CFilter.h"
#include "CBuffer.h"

#include "CBar.h"

//#include "unistd.h"

#ifdef USEBKMKS
#define LASTFILE "/////lastfileopened/////"
#define PREFRNCE "/////preferences/////"
#endif

#ifdef USEBKMKS
void setbkmkkey(const char *file, const char *mark, DBT* key);
DB* bkmks;
#endif

typedef unsigned char byte;
typedef unsigned long DWORD;
typedef unsigned short WORD;

char               filename[1024];
char               search[256];

#include "Aportis.h"
#ifndef SMALL
#include "ppm_expander.h"
#endif
//#include "Sixpack.h"
#include "Text.h"

#ifdef AGENDA
void centre_window(Fl_Window* p)
{
  p->position((Fl::w()-p->w()) >> 1, (Fl::h()-p->h()) >> 1);
}
#endif

void Cancel_cb(Fl_Widget *widget, void *data)
{
  widget->window()->hide();
}

class BuffDoc {
  CBuffer lastword;
  bool lastispara;
  CExpander* exp;
  CFilterChain* filt;
public:
  ~BuffDoc()
  {
    delete filt;
    delete exp;
  }
  BuffDoc()
  {
    exp = NULL;
    filt = NULL;
  }
  void setfilter(CFilterChain* _f)
  {
    if (filt != NULL) delete filt;
    filt = _f;
    filt->setsource(exp);
  }
  CList<Bkmk>* getbkmklist() { return exp->getbkmklist(); }
  bool hasrandomaccess() { return exp->hasrandomaccess(); }
  bool iseol() { return (lastword[0] == '\0'); }
  int openfile(char *src)
  {
    //    printf("Trying aportis %x\n",exp);
    if (exp != NULL) delete exp;
    exp = new Aportis;
    lastword[0] = '\0';
    lastispara = false;
    //    printf("Calling openfile\n");
    int ret = exp->openfile(src);
    //    printf("Called openfile\n");
    if (ret == -1)
      {
	// fl_alert("problem opening source file:%s",src);
	//	printf("problem opening source file\n");
	delete exp;
	exp = NULL;
	return ret;
      }
    if (ret == -2)
      {
	//	printf("file contains %x, %x",head.dwCreator, head.dwType);
	delete exp;
#ifndef SMALL
	//	printf("Trying ppms\n");
	exp = new ppm_expander;
	ret = exp->openfile(src);
	if (ret != 0) {
	  delete exp;
	  exp = new Text;
	  //	  printf("Trying text\n");
	  ret = exp->openfile(src);
	}
#else
	exp = new Text;
	ret = exp->openfile(src);
#endif
      }
    if (ret != 0)
      {
	fl_alert("WARNING: unknown file compression type:%d",ret);
      }
    lastword[0] = '\0';
    lastispara = false;
    exp->locate(0);
    filt->setsource(exp);
    return 0;
  }
  int getch() { return (exp == NULL) ? EOF : filt->getch(); }
  unsigned int locate() { return (exp == NULL) ? 0 : exp->locate()-strlen(lastword.data()); }
  void locate(unsigned int n);
  bool getline(CBuffer* buff, int w);
  void sizes(unsigned long& fs, unsigned long& ts) { exp->sizes(fs,ts); }
  int getpara(CBuffer& buff)
  {
    int ch, i = 0;
    while ((ch = getch()) != 10 && ch != EOF) buff[i++] = ch;
    buff[i] = '\0';
    if (i == 0 && ch == EOF) return -1;
    return i;
  }
};

void BuffDoc::locate(unsigned int n)
{
    
  lastword[0] = '\0';
  lastispara = false;
  //    char linebuf[1024];
  if (exp != NULL) exp->locate(n);
  //    while (exp.locate() < n && getline(linebuf,w));
    
}

bool BuffDoc::getline(CBuffer* buff, int w)
{
  int len = 0, ch, lastcheck = 0;
  *buff = lastword.data();
  lastcheck = len = buff->length();
  unsigned int slen = fl_widthi(buff->data(),len);
  if (slen > w)
    {
      for ( ; len > 0; len--)
	{
	  if (fl_widthi(buff->data(),len) < w) break;
	}
      lastword = buff->data() + len - 1;
      (*buff)[len-1] = '-';
      (*buff)[len] = '\0';
      return true;
    }
  if (lastispara)
    {
      lastispara = false;
      lastword[0] = '\0';
      len = buff->length();
      while (fl_widthi(buff->data(),len) > w) len--;
      (*buff)[len] = '\0';
      return true;
    }
  lastispara = false;
  while (slen < w)
    {
      lastcheck = len;
      while ((ch = getch()) != ' ' && ch != '\012' && ch != EOF)
	{
	  (*buff)[len++] = ch;
	}
      slen = fl_widthi(buff->data(),len);
      (*buff)[len++] = ' ';
      if (slen < w && ch != ' ') {
	lastcheck = len;
	break;
      }
      lastispara = (ch == '\012');
    }
  (*buff)[len] = '\0';
  lastword = buff->data()+lastcheck;
  (*buff)[(lastcheck > 0) ? lastcheck-1:lastcheck] = '\0';