/////////////////////////////////////////////////////////////////////////////
// Name: htmlfilt.cpp
// Purpose: wxHtmlFilter - input filter for translating into HTML format
// Author: Vaclav Slavik
// RCS-ID: $Id$
// Copyright: (c) 1999 Vaclav Slavik
// Licence: wxWindows Licence
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#pragma implementation
#endif
#include "wx/wxprec.h"
#include "wx/defs.h"
#if wxUSE_HTML && wxUSE_STREAMS
#ifdef __BORDLANDC__
#pragma hdrstop
#endif
#ifndef WXPRECOMP
#include "wx/log.h"
#include "wx/intl.h"
#endif
#include "wx/html/htmlfilt.h"
#include "wx/html/htmlwin.h"
// utility function: read a wxString from a wxInputStream
void wxPrivate_ReadString(wxString& str, wxInputStream* s)
{
size_t streamSize = s->GetSize();
if(streamSize == ~(size_t)0)
{
const size_t bufSize = 4095;
char buffer[bufSize+1];
size_t lastRead;
do
{
s->Read(buffer, bufSize);
lastRead = s->LastRead();
buffer[lastRead] = 0;
str.Append(buffer);
}
while(lastRead == bufSize);
}
else
{
char* src = new char[streamSize+1];
s->Read(src, streamSize);
src[streamSize] = 0;
str = src;
delete [] src;
}
}
/*
There is code for several default filters:
*/
IMPLEMENT_ABSTRACT_CLASS(wxHtmlFilter, wxObject)
//--------------------------------------------------------------------------------
// wxHtmlFilterPlainText
// filter for text/plain or uknown
//--------------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterPlainText, wxHtmlFilter)
bool wxHtmlFilterPlainText::CanRead(const wxFSFile& WXUNUSED(file)) const
{
return TRUE;
}
wxString wxHtmlFilterPlainText::ReadFile(const wxFSFile& file) const
{
wxInputStream *s = file.GetStream();
wxString doc, doc2;
if (s == NULL) return wxEmptyString;
wxPrivate_ReadString(doc, s);
doc.Replace(wxT("&"), wxT("&"), TRUE);
doc.Replace(wxT("<"), wxT("<"), TRUE);
doc.Replace(wxT(">"), wxT(">"), TRUE);
doc2 = "\n" + doc + "\n
";
return doc2;
}
//--------------------------------------------------------------------------------
// wxHtmlFilterImage
// filter for image/*
//--------------------------------------------------------------------------------
class wxHtmlFilterImage : public wxHtmlFilter
{
DECLARE_DYNAMIC_CLASS(wxHtmlFilterImage)
public:
virtual bool CanRead(const wxFSFile& file) const;
virtual wxString ReadFile(const wxFSFile& file) const;
};
IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterImage, wxHtmlFilter)
bool wxHtmlFilterImage::CanRead(const wxFSFile& file) const
{
return (file.GetMimeType().Left(6) == wxT("image/"));
}
wxString wxHtmlFilterImage::ReadFile(const wxFSFile& file) const
{
return ("![](\"")
");
}
//--------------------------------------------------------------------------------
// wxHtmlFilterPlainText
// filter for text/plain or uknown
//--------------------------------------------------------------------------------
class wxHtmlFilterHTML : public wxHtmlFilter
{
DECLARE_DYNAMIC_CLASS(wxHtmlFilterHTML)
public:
virtual bool CanRead(const wxFSFile& file) const;
virtual wxString ReadFile(const wxFSFile& file) const;
};
IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterHTML, wxHtmlFilter)
bool wxHtmlFilterHTML::CanRead(const wxFSFile& file) const
{
// return (file.GetMimeType() == "text/html");
// This is true in most case but some page can return:
// "text/html; char-encoding=...."
// So we use Find instead
return (file.GetMimeType().Find(wxT("text/html")) == 0);
}
wxString wxHtmlFilterHTML::ReadFile(const wxFSFile& file) const
{
wxInputStream *s = file.GetStream();
wxString doc;
if (s == NULL)
{
wxLogError(_("Cannot open HTML document: %s"), file.GetLocation().c_str());
return wxEmptyString;
}
wxPrivate_ReadString(doc, s);
// add meta tag if we obtained this through http:
if (file.GetMimeType().Find(_T("; charset=")) == 0)
{
wxString s(_T("");
return s+doc;
}
return doc;
}
///// Module:
class wxHtmlFilterModule : public wxModule
{
DECLARE_DYNAMIC_CLASS(wxHtmlFilterModule)
public:
virtual bool OnInit()
{
wxHtmlWindow::AddFilter(new wxHtmlFilterHTML);
wxHtmlWindow::AddFilter(new wxHtmlFilterImage);
return TRUE;
}
virtual void OnExit() {}
};
IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterModule, wxModule)
#endif