[wxWidgets.git] / src / html / htmlfilt.cpp

/////////////////////////////////////////////////////////////////////////////
// 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/wx.h"
#endif

#include "wx/html/htmlfilt.h"
#include "wx/html/htmlwin.h"


/*

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();
    char *src;
    wxString doc, doc2;

    if (s == NULL) return wxEmptyString;
    src = new char[s -> GetSize()+1];
    src[s -> GetSize()] = 0;
    s -> Read(src, s -> GetSize());
    doc = src;
    delete [] src;

    doc.Replace(wxT("<"), wxT("&lt;"), TRUE);
    doc.Replace(wxT(">"), wxT("&gt;"), TRUE);
    doc2 = "<HTML><BODY><PRE>\n" + doc + "\n</PRE></BODY></HTML>";
    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 ("<HTML><BODY><IMG SRC=\"" + file.GetLocation() + "\"></BODY></HTML>");
}


//--------------------------------------------------------------------------------
// 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();
    char *src;
    wxString doc;

    if (s == NULL) 
    {
        wxLogError(_("Cannot open HTML document: %s"), file.GetLocation().c_str());
        return wxEmptyString;
    }
    src = new char[s -> GetSize() + 1];
    src[s -> GetSize()] = 0;
    s -> Read(src, s -> GetSize());
    doc = src;
    delete[] src;

    // add meta tag if we obtained this through http:    
    if (file.GetMimeType().Find(_T("; charset=")) == 0)
    {
        wxString s(_T("<meta http-equiv=\"Content-Type\" content=\""));
        s << file.GetMimeType() <<  _T("\">");
        return s;
    }

    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
Commit	Line	Data
5526e819	1	/////////////////////////////////////////////////////////////////////////////
69941f05	2	// Name: htmlfilt.cpp
5526e819 VS	3	// Purpose: wxHtmlFilter - input filter for translating into HTML format
5526e819 VS	4	// Author: Vaclav Slavik
69941f05	5	// RCS-ID: $Id$
5526e819 VS	6	// Copyright: (c) 1999 Vaclav Slavik
	7	// Licence: wxWindows Licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10
	11	#ifdef __GNUG__
69941f05	12	#pragma implementation
5526e819 VS	13	#endif
5526e819 VS	14
4dcaf11a	15	#include "wx/wxprec.h"
5526e819	16
314260fb	17	#include "wx/defs.h"
f6bcfd97	18	#if wxUSE_HTML && wxUSE_STREAMS
5526e819 VS	19
	20	#ifdef __BORDLANDC__
	21	#pragma hdrstop
	22	#endif
	23
	24	#ifndef WXPRECOMP
4dcaf11a	25	#include "wx/wx.h"
5526e819 VS	26	#endif
5526e819 VS	27
69941f05	28	#include "wx/html/htmlfilt.h"
4dcaf11a	29	#include "wx/html/htmlwin.h"
5526e819 VS	30
	31
	32	/*
	33
	34	There is code for several default filters:
	35
	36	*/
	37
	38	IMPLEMENT_ABSTRACT_CLASS(wxHtmlFilter, wxObject)
	39
	40	//--------------------------------------------------------------------------------
	41	// wxHtmlFilterPlainText
	42	// filter for text/plain or uknown
	43	//--------------------------------------------------------------------------------
	44
	45	IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterPlainText, wxHtmlFilter)
	46
a4c97004	47	bool wxHtmlFilterPlainText::CanRead(const wxFSFile& WXUNUSED(file)) const
5526e819 VS	48	{
	49	return TRUE;
	50	}
	51
	52
	53
420ec58a	54	wxString wxHtmlFilterPlainText::ReadFile(const wxFSFile& file) const
5526e819 VS	55	{
	56	wxInputStream *s = file.GetStream();
	57	char *src;
	58	wxString doc, doc2;
	59
	60	if (s == NULL) return wxEmptyString;
259d1674 VZ	61	src = new char[s -> GetSize()+1];
	62	src[s -> GetSize()] = 0;
	63	s -> Read(src, s -> GetSize());
5526e819	64	doc = src;
8dd71e2b	65	delete [] src;
5526e819	66
66a77a74 OK	67	doc.Replace(wxT("<"), wxT("<"), TRUE);
66a77a74 OK	68	doc.Replace(wxT(">"), wxT(">"), TRUE);
5526e819 VS	69	doc2 = "<HTML><BODY><PRE>\n" + doc + "\n</PRE></BODY></HTML>";
	70	return doc2;
	71	}
	72
	73
	74
	75
	76
	77	//--------------------------------------------------------------------------------
	78	// wxHtmlFilterImage
	79	// filter for image/*
	80	//--------------------------------------------------------------------------------
	81
	82	class wxHtmlFilterImage : public wxHtmlFilter
	83	{
	84	DECLARE_DYNAMIC_CLASS(wxHtmlFilterImage)
	85
	86	public:
420ec58a VS	87	virtual bool CanRead(const wxFSFile& file) const;
420ec58a VS	88	virtual wxString ReadFile(const wxFSFile& file) const;
5526e819 VS	89	};
	90
	91	IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterImage, wxHtmlFilter)
	92
	93
	94
420ec58a	95	bool wxHtmlFilterImage::CanRead(const wxFSFile& file) const
5526e819	96	{
0413cec5	97	return (file.GetMimeType().Left(6) == wxT("image/"));
5526e819 VS	98	}
	99
	100
	101
420ec58a	102	wxString wxHtmlFilterImage::ReadFile(const wxFSFile& file) const
5526e819 VS	103	{
	104	return ("<HTML><BODY><IMG SRC=\"" + file.GetLocation() + "\"></BODY></HTML>");
	105	}
	106
	107
	108
	109
	110	//--------------------------------------------------------------------------------
	111	// wxHtmlFilterPlainText
	112	// filter for text/plain or uknown
	113	//--------------------------------------------------------------------------------
	114
	115	class wxHtmlFilterHTML : public wxHtmlFilter
	116	{
	117	DECLARE_DYNAMIC_CLASS(wxHtmlFilterHTML)
	118
	119	public:
420ec58a VS	120	virtual bool CanRead(const wxFSFile& file) const;
420ec58a VS	121	virtual wxString ReadFile(const wxFSFile& file) const;
5526e819 VS	122	};
	123
	124
	125	IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterHTML, wxHtmlFilter)
	126
420ec58a	127	bool wxHtmlFilterHTML::CanRead(const wxFSFile& file) const
5526e819	128	{
f61815af GL	129	// return (file.GetMimeType() == "text/html");
	130	// This is true in most case but some page can return:
	131	// "text/html; char-encoding=...."
	132	// So we use Find instead
77611ad4	133	return (file.GetMimeType().Find(wxT("text/html")) == 0);
5526e819 VS	134	}
	135
	136
	137
420ec58a	138	wxString wxHtmlFilterHTML::ReadFile(const wxFSFile& file) const
5526e819 VS	139	{
	140	wxInputStream *s = file.GetStream();
	141	char *src;
	142	wxString doc;
	143
f3c82859 VS	144	if (s == NULL)
f3c82859 VS	145	{
f6bcfd97	146	wxLogError(_("Cannot open HTML document: %s"), file.GetLocation().c_str());
f3c82859 VS	147	return wxEmptyString;
f3c82859 VS	148	}
2776d7c3	149	src = new char[s -> GetSize() + 1];
259d1674 VZ	150	src[s -> GetSize()] = 0;
259d1674 VZ	151	s -> Read(src, s -> GetSize());
5526e819	152	doc = src;
2776d7c3	153	delete[] src;
5526e819	154
981e62aa VS	155	// add meta tag if we obtained this through http:
	156	if (file.GetMimeType().Find(_T("; charset=")) == 0)
	157	{
	158	wxString s(_T("<meta http-equiv=\"Content-Type\" content=\""));
	159	s << file.GetMimeType() << _T("\">");
	160	return s;
	161	}
	162
3ca6a5f0	163	return doc;
5526e819 VS	164	}
	165
	166
	167
	168
	169	///// Module:
	170
	171	class wxHtmlFilterModule : public wxModule
	172	{
	173	DECLARE_DYNAMIC_CLASS(wxHtmlFilterModule)
	174
	175	public:
	176	virtual bool OnInit()
	177	{
	178	wxHtmlWindow::AddFilter(new wxHtmlFilterHTML);
	179	wxHtmlWindow::AddFilter(new wxHtmlFilterImage);
	180	return TRUE;
	181	}
	182	virtual void OnExit() {}
	183	};
	184
	185	IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterModule, wxModule)
	186
8dd71e2b	187	#endif