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helphtml.cpp
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2002-11-04
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/////////////////////////////////////////////////////////////////////////////
// Name: helphtml.cpp
// Purpose: base class for html help systems
// Author: Karsten Ballueder
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id: helphtml.cpp,v 1.23.2.1 2002/10/29 21:47:53 RR Exp $
// Copyright: (c) Karsten Ballueder
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
# pragma implementation "helphtml.h"
#endif
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_HELP
#ifndef WX_PRECOMP
#include "wx/setup.h"
#include "wx/string.h"
#include "wx/utils.h"
#include "wx/list.h"
#include "wx/intl.h"
#include "wx/msgdlg.h"
#include "wx/choicdlg.h"
#endif
#include "wx/helpbase.h"
#include "wx/generic/helpext.h"
#include <stdio.h>
#include <ctype.h>
#ifndef __MWERKS__
#include <sys/stat.h>
#endif
#if !defined(__WINDOWS__) && !defined(__OS2__)
#include <unistd.h>
#endif
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
/// Name for map file.
#define WXEXTHELP_MAPFILE _T("wxhelp.map")
/// Maximum line length in map file.
#define WXEXTHELP_BUFLEN 512
/// Character introducing comments/documentation field in map file.
#define WXEXTHELP_COMMENTCHAR ';'
#define CONTENTS_ID 0
class wxExtHelpMapEntry : public wxObject
{
public:
int id;
wxString url;
wxString doc;
wxExtHelpMapEntry(int iid, wxString const &iurl, wxString const &idoc)
{ id = iid; url = iurl; doc = idoc; }
};
IMPLEMENT_ABSTRACT_CLASS(wxHTMLHelpControllerBase, wxHelpControllerBase)
/**
This class implements help via an external browser.
It requires the name of a directory containing the documentation
and a file mapping numerical Section numbers to relative URLS.
*/
wxHTMLHelpControllerBase::wxHTMLHelpControllerBase()
{
m_MapList = (wxList*) NULL;
m_NumOfEntries = 0;
}
void
wxHTMLHelpControllerBase::DeleteList()
{
if(m_MapList)
{
wxNode *node = m_MapList->First();
while (node)
{
delete (wxExtHelpMapEntry *)node->Data();
delete node;
node = m_MapList->First();
}
delete m_MapList;
m_MapList = (wxList*) NULL;
}
}
wxHTMLHelpControllerBase::~wxHTMLHelpControllerBase()
{
DeleteList();
}
/** This must be called to tell the controller where to find the
documentation.
@param file - NOT a filename, but a directory name.
@return true on success
*/
bool
wxHTMLHelpControllerBase::Initialize(const wxString& file)
{
return LoadFile(file);
}
// ifile is the name of the base help directory
bool
wxHTMLHelpControllerBase::LoadFile(const wxString& ifile)
{
wxString mapFile, file, url, doc;
int id,i,len;
char buffer[WXEXTHELP_BUFLEN];
wxBusyCursor b; // display a busy cursor
if(! ifile.IsEmpty())
{
file = ifile;
if(! wxIsAbsolutePath(file))
{
wxChar* f = wxGetWorkingDirectory();
file = f;
delete[] f; // wxGetWorkingDirectory returns new memory
#ifdef __WXMAC__
file << ifile;
#else
file << WXEXTHELP_SEPARATOR << ifile;
#endif
}
else
file = ifile;
#if wxUSE_INTL
// If a locale is set, look in file/localename, i.e.
// If passed "/usr/local/myapp/help" and the current wxLocale is
// set to be "de", then look in "/usr/local/myapp/help/de/"
// first and fall back to "/usr/local/myapp/help" if that
// doesn't exist.
if(wxGetLocale() && !wxGetLocale()->GetName().IsEmpty())
{
wxString newfile;
newfile << WXEXTHELP_SEPARATOR << wxGetLocale()->GetName();
if(wxDirExists(newfile))
file = newfile;
else
{
newfile = WXEXTHELP_SEPARATOR;
const wxChar *cptr = wxGetLocale()->GetName().c_str();
while(*cptr && *cptr != wxT('_'))
newfile << *(cptr++);
if(wxDirExists(newfile))
file = newfile;
}
}
#endif
if(! wxDirExists(file))
return FALSE;
mapFile << file << WXEXTHELP_SEPARATOR << WXEXTHELP_MAPFILE;
}
else // try to reload old file
mapFile = m_MapFile;
if(! wxFileExists(mapFile))
return FALSE;
DeleteList();
m_MapList = new wxList;
m_NumOfEntries = 0;
FILE *input = wxFopen(mapFile,wxT("rt"));
if(! input)
return FALSE;
do
{
if(fgets(buffer,WXEXTHELP_BUFLEN,input) && *buffer != WXEXTHELP_COMMENTCHAR)
{
len = strlen(buffer);
if(buffer[len-1] == '\n')
buffer[len-1] = '\0'; // cut of trailing newline
if(sscanf(buffer,"%d", &id) != 1)
break; // error
for(i=0; isdigit(buffer[i])||isspace(buffer[i])||buffer[i]=='-'; i++)
; // find begin of URL
url = wxT("");
while(buffer[i] && ! isspace(buffer[i]) && buffer[i] !=
WXEXTHELP_COMMENTCHAR)
url << (wxChar) buffer[i++];
while(buffer[i] && buffer[i] != WXEXTHELP_COMMENTCHAR)
i++;
doc = wxT("");
if(buffer[i])
doc = wxString::FromAscii( (buffer + i + 1) ); // skip the comment character
m_MapList->Append(new wxExtHelpMapEntry(id,url,doc));
m_NumOfEntries++;
}
}while(! feof(input));
fclose(input);
m_MapFile = file; // now it's valid
return TRUE;
}
bool
wxHTMLHelpControllerBase::DisplayContents()
{
if(! m_NumOfEntries)
return FALSE;
wxString contents;
wxNode *node = m_MapList->First();
wxExtHelpMapEntry *entry;
while(node)
{
entry = (wxExtHelpMapEntry *)node->Data();
if(entry->id == CONTENTS_ID)
{
contents = entry->url;
break;
}
node = node->Next();
}
bool rc = FALSE;
wxString file;
file << m_MapFile << WXEXTHELP_SEPARATOR << contents;
if(file.Contains(wxT('#')))
file = file.BeforeLast(wxT('#'));
if(contents.Length() && wxFileExists(file))
rc = DisplaySection(CONTENTS_ID);
// if not found, open homemade toc:
return rc ? TRUE : KeywordSearch(wxT(""));
}
bool
wxHTMLHelpControllerBase::DisplaySection(int sectionNo)
{
if(! m_NumOfEntries)
return FALSE;
wxBusyCursor b; // display a busy cursor
wxNode *node = m_MapList->First();
wxExtHelpMapEntry *entry;
while(node)
{
entry = (wxExtHelpMapEntry *)node->Data();
if(entry->id == sectionNo)
return DisplayHelp(entry->url);
node = node->Next();
}
return FALSE;
}
bool wxHTMLHelpControllerBase::DisplaySection(const wxString& section)
{
bool isFilename = (section.Find(wxT(".htm")) != -1);
if (isFilename)
return DisplayHelp(section);
else
return KeywordSearch(section);
}
bool
wxHTMLHelpControllerBase::DisplayBlock(long blockNo)
{
return DisplaySection((int)blockNo);
}
bool
wxHTMLHelpControllerBase::KeywordSearch(const wxString& k)
{
if(! m_NumOfEntries)
return FALSE;
wxString *choices = new wxString[m_NumOfEntries];
wxString *urls = new wxString[m_NumOfEntries];
wxString compA, compB;
int idx = 0, j;
bool rc;
bool showAll = k.IsEmpty();
wxNode *node = m_MapList->First();
wxExtHelpMapEntry *entry;
{
wxBusyCursor b; // display a busy cursor
compA = k; compA.LowerCase(); // we compare case insensitive
while(node)
{
entry = (wxExtHelpMapEntry *)node->Data();
compB = entry->doc; compB.LowerCase();
if((showAll || compB.Contains(k)) && ! compB.IsEmpty())
{
urls[idx] = entry->url;
// doesn't work:
// choices[idx] = (**i).doc.Contains((**i).doc.Before(WXEXTHELP_COMMENTCHAR));
//if(choices[idx].IsEmpty()) // didn't contain the ';'
// choices[idx] = (**i).doc;
choices[idx] = wxT("");
for(j=0;entry->doc.c_str()[j]
&& entry->doc.c_str()[j] != WXEXTHELP_COMMENTCHAR; j++)
choices[idx] << entry->doc.c_str()[j];
idx++;
}
node = node->Next();
}
}
if(idx == 1)
rc = DisplayHelp(urls[0]);
else if(idx == 0)
{
wxMessageBox(_("No entries found."));
rc = FALSE;
}
else
{
idx = wxGetSingleChoiceIndex(showAll ? _("Help Index") : _("Relevant entries:"),
showAll ? _("Help Index") : _("Entries found"),
idx,choices);
if(idx != -1)
rc = DisplayHelp(urls[idx]);
else
rc = FALSE;
}
delete[] urls;
delete[] choices;
return rc;
}
bool
wxHTMLHelpControllerBase::Quit()
{
return TRUE;
}
void
wxHTMLHelpControllerBase::OnQuit()
{
}
#endif // wxUSE_HELP