src/richtext/richtexthtml.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/richtext/richtexthtml.cpp
// Purpose:     HTML I/O for wxRichTextCtrl
// Author:      Julian Smart
// Modified by:
// Created:     2005-09-30
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_RICHTEXT

#include "wx/richtext/richtexthtml.h"

#ifndef WX_PRECOMP
#endif

#include "wx/filename.h"
#include "wx/wfstream.h"
#include "wx/txtstrm.h"

IMPLEMENT_DYNAMIC_CLASS(wxRichTextHTMLHandler, wxRichTextFileHandler)

/// Can we handle this filename (if using files)? By default, checks the extension.
bool wxRichTextHTMLHandler::CanHandle(const wxString& filename) const
{
    wxString path, file, ext;
    wxSplitPath(filename, & path, & file, & ext);

    return (ext.Lower() == wxT("html") || ext.Lower() == wxT("htm"));
}


#if wxUSE_STREAMS
bool wxRichTextHTMLHandler::DoLoadFile(wxRichTextBuffer *WXUNUSED(buffer), wxInputStream& WXUNUSED(stream))
{
    return false;
}

/*
 * We need to output only _changes_ in character formatting.
 */

bool wxRichTextHTMLHandler::DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream& stream)
{
    buffer->Defragment();

    wxTextOutputStream str(stream);

    wxTextAttrEx currentParaStyle = buffer->GetAttributes();
    wxTextAttrEx currentCharStyle = buffer->GetAttributes();

    str << wxT("<html><head></head><body>\n");

    /*
    wxRichText may be support paper formats like a1/a2/a3/a4
    when this widget grown enough, i should turn back and support its new features
    but not yet

      str << wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td>");

        wxString left_indent = SymbolicIndent(currentParaStyle.GetLeftIndent());
        wxString right_indent = SymbolicIndent(currentParaStyle.GetRightIndent());

          str << wxString::Format(wxT("%s</td><td></td><td>%s</td></tr><tr>"),
          left_indent.c_str(), //Document-Wide Left Indent
          right_indent.c_str()); //Document-Wide Right Indent

            str << wxT("<td></td><td width=\"100%\">");
    */

    str << wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td width=\"100%\">");

    str << wxString::Format(wxT("<font face=\"%s\" size=\"%ld\" color=\"%s\" >"),
        currentParaStyle.GetFont().GetFaceName().c_str(), Pt_To_Size( currentParaStyle.GetFont().GetPointSize() ),
        currentParaStyle.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX).c_str());

    //wxString align = GetAlignment( currentParaStyle.GetAlignment() );
    //str << wxString::Format(wxT("<p align=\"%s\">"), align );

    m_font = false;
    m_indent = 0;
    m_list = false;

    wxRichTextObjectList::compatibility_iterator node = buffer->GetChildren().GetFirst();
    while (node)
    {
        wxRichTextParagraph* para = wxDynamicCast(node->GetData(), wxRichTextParagraph);
        wxASSERT (para != NULL);

        if (para)
        {
            wxTextAttrEx paraStyle(para->GetCombinedAttributes());

            OutputParagraphFormatting(currentParaStyle, paraStyle, stream);

            wxRichTextObjectList::compatibility_iterator node2 = para->GetChildren().GetFirst();
            while (node2)
            {
                wxRichTextObject* obj = node2->GetData();
                wxRichTextPlainText* textObj = wxDynamicCast(obj, wxRichTextPlainText);
                if (textObj && !textObj->IsEmpty())
                {
                    wxTextAttrEx charStyle(para->GetCombinedAttributes(obj->GetAttributes()));
                    BeginCharacterFormatting(currentCharStyle, charStyle, paraStyle, stream);

                    str << textObj->GetText();

                    EndCharacterFormatting(currentCharStyle, charStyle, paraStyle, stream);
                }

                wxRichTextImage* image = wxDynamicCast(obj, wxRichTextImage);
                if( image && !image->IsEmpty())
                    Image_to_Base64( image, stream );

                node2 = node2->GetNext();
            }
            str << wxT("\n");
            //OutputParagraphFormatting(currentParaStyle, para->GetAttributes(), stream, false);
        }
        node = node->GetNext();
    }

    str << wxT("</font></td></tr></table></body></html>\n");

    return true;
}

void wxRichTextHTMLHandler::BeginCharacterFormatting(const wxTextAttrEx& currentStyle, const wxTextAttrEx& thisStyle, const wxTextAttrEx& paraStyle, wxOutputStream& stream)
{
    wxTextOutputStream str(stream);

    //Is the item bulleted one?
    if( paraStyle.GetBulletStyle() != wxTEXT_ATTR_BULLET_STYLE_NONE )
    {
        //Is there any opened list?
        if( m_list )
        {
            //Yes there is

            //Is the item among the previous ones
            //Is the item one of the previous list tag's child items
            if( (paraStyle.GetLeftIndent() == (m_indent + 100)) || (paraStyle.GetLeftIndent() < 100) )
                str << wxT("<li>");//Yes it is
            else
            {
                //No it isn't

                //So we should close the list tag
                str << (m_is_ul ? wxT("</ul>") : wxT("</ol>"));

                //And renavigate to new list's horizontal position
                NavigateToListPosition(paraStyle, str);
                //Ok it's done

                //Get the appropriate tag, an ol for numerical values, an ul for dot, square etc.
                wxString tag;
                TypeOfList(paraStyle, tag);
                str << tag << wxT("<li>");
            }
        }
        else
        {
            //No there isn't a list

            //navigate to new list's horizontal position(indent)
            NavigateToListPosition(paraStyle, str);

            //Get the appropriate tag, an ol for numerical values, an ul for dot, square etc.
            wxString tag;
            TypeOfList(paraStyle, tag);
            str << tag << wxT("<li>");

            //Now we have a list, mark it.
            m_list = true;
        }
    }
    else if( m_list )
    {
        //The item is not bulleted and there is a list what should be closed now.
        //So close the list

        str << (m_is_ul ? wxT("</ul>") : wxT("</ol>"));
        //And mark as there is no an opened list
        m_list = false;
    }

    // does the item have an indentation ?
    if( paraStyle.GetLeftIndent() )
    {
        if( paraStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_NONE )
        {
            if( m_indent )
            {
                if( (paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent()) == m_indent )
                {
                    if( paraStyle.GetLeftSubIndent() < 0 )
                    {
                        str << SymbolicIndent(~paraStyle.GetLeftSubIndent());
                    }
                }
                else
                {
                    if( paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent() > m_indent )
                    {
                        Indent(paraStyle, str);
                        m_indent = paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent();
                        m_indents.Add( m_indent );
                    }
                    else
                    {
                        int i = m_indents.size() - 1;
                        for(; i > -1; i--)
                        {
                            if( m_indent < (paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent()) )
                            {
                                Indent(paraStyle, str);
                                m_indent = paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent();
                                m_indents.Add( m_indent );

                                break;
                            }
                            else if( m_indent == (paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent()) )
                            {
                                if( paraStyle.GetLeftSubIndent() < 0 )
                                {
                                    str << SymbolicIndent(~paraStyle.GetLeftSubIndent());
                                }
                                break;
                            }
                            else
                            {
                                str << wxT("</td></tr></table>");

                                m_indents.RemoveAt(i);

                                if( i < 1 ){m_indent=0; break;}
                                m_indent = m_indents[i-1];
                            }
                        }
                    }
                }
            }
            else
            {
                Indent(paraStyle, str);
                m_indent = paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent();
                m_indents.Add( m_indent );
            }
        }
    }
    else if( m_indent )
    {
        //The item is not indented and there is a table(s) what should be closed now.

        //So close them
        for(unsigned int i = 0; i < m_indents.size(); i++ )
            str << wxT("</td></tr></table>");

        m_indent = 0;
        m_indents.Clear();
    }


    wxString style;

    //Is there any change on the font properties of the item
    if( thisStyle.GetFont().GetFaceName() != currentStyle.GetFont().GetFaceName() )
        style += wxString::Format(wxT(" face=\"%s\""), thisStyle.GetFont().GetFaceName().c_str());
    if( thisStyle.GetFont().GetPointSize() != currentStyle.GetFont().GetPointSize() )
        style += wxString::Format(wxT(" size=\"%ld\""), Pt_To_Size(thisStyle.GetFont().GetPointSize()) );
    if( thisStyle.GetTextColour() != currentStyle.GetTextColour() )
        style += wxString::Format(wxT(" color=\"%s\""), thisStyle.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX).c_str());

    if( style.size() )
    {
        str << wxString::Format(wxT("<font %s >"), style.c_str());
        m_font = true;
    }

    if( thisStyle.GetFont().GetWeight() == wxBOLD )
        str << wxT("<b>");
    if( thisStyle.GetFont().GetStyle() == wxITALIC )
        str << wxT("<i>");
    if( thisStyle.GetFont().GetUnderlined() )
        str << wxT("<u>");
}

void wxRichTextHTMLHandler::EndCharacterFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, const wxTextAttrEx& WXUNUSED(paraStyle), wxOutputStream& stream)
{
    wxTextOutputStream str(stream);

    if( thisStyle.GetFont().GetUnderlined() )
        str << wxT("</u>");
    if( thisStyle.GetFont().GetStyle() == wxITALIC )
        str << wxT("</i>");
    if( thisStyle.GetFont().GetWeight() == wxBOLD )
        str << wxT("</b>");

    if( m_font )
    {
        m_font = false;
        str << wxT("</font>");
    }
}

/// Output paragraph formatting
void wxRichTextHTMLHandler::OutputParagraphFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxOutputStream& stream)
{
    //If there is no opened list currently, insert a <p> after every paragraph
    if(!m_list)
    {
        wxTextOutputStream str(stream);
        wxString align = GetAlignment( thisStyle );
        str << wxString::Format(wxT("<p align=\"%s\">"), align.c_str());
    }
}

void wxRichTextHTMLHandler::NavigateToListPosition(const wxTextAttrEx& thisStyle, wxTextOutputStream& str)
{
    //indenting an item using an ul/ol tag is equal to inserting 5 x &nbsp; on its left side.
    //so we should start from 100 point left

    //Is the second td's left wall of the current indentaion table at the 100+ point-left-side
    //of the item, horizontally?
    if( m_indent + 100 < thisStyle.GetLeftIndent() )
    {
        //yes it is
        LIndent(thisStyle, str);
        m_indent = thisStyle.GetLeftIndent() - 100;
        m_indents.Add( m_indent );
        return;
    }
    //No it isn't

    int i = m_indents.size() - 1;
    for(; i > -1; i--)
    {
        //Is the second td's left wall of the current indentaion table at the 100+ point-left-side
        //of the item ?
        if( m_indent + 100 < thisStyle.GetLeftIndent() )
        {
            //Yes it is
            LIndent(thisStyle, str);
            m_indent = thisStyle.GetLeftIndent() - 100;
            m_indents.Add( m_indent );
            break;
        }
        else if( m_indent + 100 == thisStyle.GetLeftIndent() )
            break;//exact match
        else
        {
            //No it is not, the second td's left wall of the current indentaion table is at the
            //right side of the current item horizontally, so close it.
            str << wxT("</td></tr></table>");

            m_indents.RemoveAt(i);

            if( i < 1 ){m_indent=0; break;}
            m_indent = m_indents[i-1];
        }
    }
}
void wxRichTextHTMLHandler::Indent( const wxTextAttrEx& thisStyle, wxTextOutputStream& str )
{
    //As a five year experienced web developer i assure you there is no way to indent an item
    //in html way, but we can use tables.


    //Item -> "Hello world"
    //Its Left Indentation -> 100
    //Its Left Sub-Indentation ->40
    //A typical indentation-table for the item will be construct as the following

    //3 x nbsp = 60
    //2 x nbsp = 40
    //LSI = Left Sub Indent
    //LI = Left Indent - LSI
    //
    //-------------------------------------------
    //|&nbsp;&nbsp;nbsp;|nbsp;nbsp;Hello World  |
    //|      |          |    |                  |
    //|        V        |    V                  |
    //|      --LI--     | --LSI--               |
    //-------------------------------------------

    str << wxT("<table width=\"100%\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr>");

    wxString symbolic_indent = SymbolicIndent( (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent()) - m_indent );
    str << wxString::Format( wxT("<td>%s</td>"), symbolic_indent.c_str() );
    str << wxT("<td width=\"100%\">");

    if( thisStyle.GetLeftSubIndent() < 0 )
    {
        str << SymbolicIndent(~thisStyle.GetLeftSubIndent());
    }
}

void wxRichTextHTMLHandler::LIndent( const wxTextAttrEx& thisStyle, wxTextOutputStream& str )
{
    //Code:
    //r.BeginNumberedBullet(1, 200, 60);
    //r.Newline();
    //r.WriteText(wxT("first item"));
    //r.EndNumberedBullet();
    //r.BeginNumberedBullet(2, 200, 60);
    //r.Newline();
    //r.WriteText(wxT("second item."));
    //r.EndNumberedBullet();
    //
    //A typical indentation-table for the item will be construct as the following

    //1 x nbsp = 20 point
    //ULI -> 100pt (UL/OL tag indents its sub element by 100 point)
    //<--------- 100 pt ---------->|
    //------------------------------------------------------
    //|&nbsp;&nbsp;nbsp;&nbsp;nbsp;|<ul>                   |
    //|                            |<-ULI-><li>first item  |
    //|                            |<-ULI-><li>second item |
    //|                            |</ul>                  |
    //------------------------------------------------------
    //                             |<-100->|


    str << wxT("<table width=\"100%\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr>");

    wxString symbolic_indent = SymbolicIndent( (thisStyle.GetLeftIndent() - m_indent) - 100);
    str << wxString::Format( wxT("<td>%s</td>"), symbolic_indent.c_str() );
    str << wxT("<td width=\"100%\">");
}

void wxRichTextHTMLHandler::TypeOfList( const wxTextAttrEx& thisStyle, wxString& tag )
{
    //We can use number attribute of li tag but not all the browsers support it.
    //also wxHtmlWindow doesn't support type attribute.

    m_is_ul = false;
    if( thisStyle.GetBulletStyle() == (wxTEXT_ATTR_BULLET_STYLE_ARABIC|wxTEXT_ATTR_BULLET_STYLE_PERIOD))
        tag = wxT("<ol type=\"1\">");
    else if( thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_UPPER )
        tag = wxT("<ol type=\"A\">");
    else if( thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_LOWER )
        tag = wxT("<ol type=\"a\">");
    else if( thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_UPPER )
        tag = wxT("<ol type=\"I\">");
    else if( thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_LOWER )
        tag = wxT("<ol type=\"i\">");
    else
    {
        tag = wxT("<ul>");
        m_is_ul = true;
    }
}

wxString wxRichTextHTMLHandler::GetAlignment( const wxTextAttrEx& thisStyle )
{
    switch( thisStyle.GetAlignment() )
    {
    case wxTEXT_ALIGNMENT_LEFT:
        return  wxT("left");
    case wxTEXT_ALIGNMENT_RIGHT:
        return wxT("right");
    case wxTEXT_ALIGNMENT_CENTER:
        return wxT("center");
    case wxTEXT_ALIGNMENT_JUSTIFIED:
        return wxT("justify");
    default:
        return wxT("left");
    }
}

void wxRichTextHTMLHandler::Image_to_Base64(wxRichTextImage* image, wxOutputStream& stream)
{
    wxTextOutputStream str(stream);

    str << wxT("<img src=\"");
    str << wxT("data:");
    str << GetMimeType(image->GetImageBlock().GetImageType());
    str << wxT(";base64,");

    if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
        image->MakeBlock();

    wxChar* data = b64enc( image->GetImageBlock().GetData(), image->GetImageBlock().GetDataSize() );
    str << data;

    delete[] data;

    str << wxT("\" />");
}

long wxRichTextHTMLHandler::Pt_To_Size(long size)
{
    //return most approximate size
    if(size < 9 ) return 1;
    else if( size < 11 ) return 2;
    else if( size < 14 ) return 3;
    else if( size < 18 ) return 4;
    else if( size < 23 ) return 5;
    else if( size < 30 ) return 6;
    else return 7;
}

wxString wxRichTextHTMLHandler::SymbolicIndent(long indent)
{
    wxString in;
    for(;indent > 0; indent -= 20)
        in.Append( wxT("&nbsp;") );
    return in;
}

const wxChar* wxRichTextHTMLHandler::GetMimeType(int imageType)
{
    switch(imageType)
    {
    case wxBITMAP_TYPE_BMP:
        return wxT("image/bmp");
    case wxBITMAP_TYPE_TIF:
        return wxT("image/tiff");
    case wxBITMAP_TYPE_GIF:
        return wxT("image/gif");
    case wxBITMAP_TYPE_PNG:
        return wxT("image/png");
    case wxBITMAP_TYPE_JPEG:
        return wxT("image/jpeg");
    default:
        return wxT("image/unknown");
    }
}

//exim-style base64 encoder
wxChar* wxRichTextHTMLHandler::b64enc( unsigned char* input, size_t in_len )
{
    //elements of enc64 array must be 8 bit values
    //otherwise encoder will fail
    //hmmm.. Does wxT macro define a char as 16 bit value
    //when compiling with UNICODE option?
    static const wxChar enc64[] = wxT("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
    wxChar* output = new wxChar[4*((in_len+2)/3)+1];
    wxChar* p = output;

    while( in_len-- > 0 )
    {
        register wxChar a, b;

        a = *input++;

        *p++ = enc64[ (a >> 2) & 0x3f ];

        if( in_len-- == 0 )
        {
            *p++ = enc64[ (a << 4 ) & 0x30 ];
            *p++ = '=';
            *p++ = '=';
            break;
        }

        b = *input++;

        *p++ = enc64[(( a << 4 ) | ((b >> 4) &0xf )) & 0x3f];

        if( in_len-- == 0 )
        {
            *p++ = enc64[ (b << 2) & 0x3f ];
            *p++ = '=';
            break;
        }

        a = *input++;

        *p++ = enc64[ ((( b << 2 ) & 0x3f ) | ((a >> 6)& 0x3)) & 0x3f ];

        *p++ = enc64[ a & 0x3f ];
    }
    *p = 0;

    return output;
}
#endif
// wxUSE_STREAMS

#endif
// wxUSE_RICHTEXT
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/richtext/richtexthtml.cpp
	3	// Purpose: HTML I/O for wxRichTextCtrl
	4	// Author: Julian Smart
	5	// Modified by:
	6	// Created: 2005-09-30
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Julian Smart
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	// For compilers that support precompilation, includes "wx.h".
	13	#include "wx/wxprec.h"
	14
	15	#ifdef __BORLANDC__
	16	#pragma hdrstop
	17	#endif
	18
	19	#if wxUSE_RICHTEXT
	20
	21	#include "wx/richtext/richtexthtml.h"
	22
	23	#ifndef WX_PRECOMP
	24	#endif
	25
	26	#include "wx/filename.h"
	27	#include "wx/wfstream.h"
	28	#include "wx/txtstrm.h"
	29
	30	IMPLEMENT_DYNAMIC_CLASS(wxRichTextHTMLHandler, wxRichTextFileHandler)
	31
	32	/// Can we handle this filename (if using files)? By default, checks the extension.
	33	bool wxRichTextHTMLHandler::CanHandle(const wxString& filename) const
	34	{
	35	wxString path, file, ext;
	36	wxSplitPath(filename, & path, & file, & ext);
	37
	38	return (ext.Lower() == wxT("html") \|\| ext.Lower() == wxT("htm"));
	39	}
	40
	41
	42	#if wxUSE_STREAMS
	43	bool wxRichTextHTMLHandler::DoLoadFile(wxRichTextBuffer *WXUNUSED(buffer), wxInputStream& WXUNUSED(stream))
	44	{
	45	return false;
	46	}
	47
	48	/*
	49	* We need to output only _changes_ in character formatting.
	50	*/
	51
	52	bool wxRichTextHTMLHandler::DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream& stream)
	53	{
	54	buffer->Defragment();
	55
	56	wxTextOutputStream str(stream);
	57
	58	wxTextAttrEx currentParaStyle = buffer->GetAttributes();
	59	wxTextAttrEx currentCharStyle = buffer->GetAttributes();
	60
	61	str << wxT("<html><head></head><body>\n");
	62
	63	/*
	64	wxRichText may be support paper formats like a1/a2/a3/a4
	65	when this widget grown enough, i should turn back and support its new features
	66	but not yet
	67
	68	str << wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td>");
	69
	70	wxString left_indent = SymbolicIndent(currentParaStyle.GetLeftIndent());
	71	wxString right_indent = SymbolicIndent(currentParaStyle.GetRightIndent());
	72
	73	str << wxString::Format(wxT("%s</td><td></td><td>%s</td></tr><tr>"),
	74	left_indent.c_str(), //Document-Wide Left Indent
	75	right_indent.c_str()); //Document-Wide Right Indent
	76
	77	str << wxT("<td></td><td width=\"100%\">");
	78	*/
	79
	80	str << wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td width=\"100%\">");
	81
	82	str << wxString::Format(wxT("<font face=\"%s\" size=\"%ld\" color=\"%s\" >"),
	83	currentParaStyle.GetFont().GetFaceName().c_str(), Pt_To_Size( currentParaStyle.GetFont().GetPointSize() ),
	84	currentParaStyle.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX).c_str());
	85
	86	//wxString align = GetAlignment( currentParaStyle.GetAlignment() );
	87	//str << wxString::Format(wxT("<p align=\"%s\">"), align );
	88
	89	m_font = false;
	90	m_indent = 0;
	91	m_list = false;
	92
	93	wxRichTextObjectList::compatibility_iterator node = buffer->GetChildren().GetFirst();
	94	while (node)
	95	{
	96	wxRichTextParagraph* para = wxDynamicCast(node->GetData(), wxRichTextParagraph);
	97	wxASSERT (para != NULL);
	98
	99	if (para)
	100	{
	101	wxTextAttrEx paraStyle(para->GetCombinedAttributes());
	102
	103	OutputParagraphFormatting(currentParaStyle, paraStyle, stream);
	104
	105	wxRichTextObjectList::compatibility_iterator node2 = para->GetChildren().GetFirst();
	106	while (node2)
	107	{
	108	wxRichTextObject* obj = node2->GetData();
	109	wxRichTextPlainText* textObj = wxDynamicCast(obj, wxRichTextPlainText);
	110	if (textObj && !textObj->IsEmpty())
	111	{
	112	wxTextAttrEx charStyle(para->GetCombinedAttributes(obj->GetAttributes()));
	113	BeginCharacterFormatting(currentCharStyle, charStyle, paraStyle, stream);
	114
	115	str << textObj->GetText();
	116
	117	EndCharacterFormatting(currentCharStyle, charStyle, paraStyle, stream);
	118	}
	119
	120	wxRichTextImage* image = wxDynamicCast(obj, wxRichTextImage);
	121	if( image && !image->IsEmpty())
	122	Image_to_Base64( image, stream );
	123
	124	node2 = node2->GetNext();
	125	}
	126	str << wxT("\n");
	127	//OutputParagraphFormatting(currentParaStyle, para->GetAttributes(), stream, false);
	128	}
	129	node = node->GetNext();
	130	}
	131
	132	str << wxT("</font></td></tr></table></body></html>\n");
	133
	134	return true;
	135	}
	136
	137	void wxRichTextHTMLHandler::BeginCharacterFormatting(const wxTextAttrEx& currentStyle, const wxTextAttrEx& thisStyle, const wxTextAttrEx& paraStyle, wxOutputStream& stream)
	138	{
	139	wxTextOutputStream str(stream);
	140
	141	//Is the item bulleted one?
	142	if( paraStyle.GetBulletStyle() != wxTEXT_ATTR_BULLET_STYLE_NONE )
	143	{
	144	//Is there any opened list?
	145	if( m_list )
	146	{
	147	//Yes there is
	148
	149	//Is the item among the previous ones
	150	//Is the item one of the previous list tag's child items
	151	if( (paraStyle.GetLeftIndent() == (m_indent + 100)) \|\| (paraStyle.GetLeftIndent() < 100) )
	152	str << wxT("<li>");//Yes it is
	153	else
	154	{
	155	//No it isn't
	156
	157	//So we should close the list tag
	158	str << (m_is_ul ? wxT("</ul>") : wxT("</ol>"));
	159
	160	//And renavigate to new list's horizontal position
	161	NavigateToListPosition(paraStyle, str);
	162	//Ok it's done
	163
	164	//Get the appropriate tag, an ol for numerical values, an ul for dot, square etc.
	165	wxString tag;
	166	TypeOfList(paraStyle, tag);
	167	str << tag << wxT("<li>");
	168	}
	169	}
	170	else
	171	{
	172	//No there isn't a list
	173
	174	//navigate to new list's horizontal position(indent)
	175	NavigateToListPosition(paraStyle, str);
	176
	177	//Get the appropriate tag, an ol for numerical values, an ul for dot, square etc.
	178	wxString tag;
	179	TypeOfList(paraStyle, tag);
	180	str << tag << wxT("<li>");
	181
	182	//Now we have a list, mark it.
	183	m_list = true;
	184	}
	185	}
	186	else if( m_list )
	187	{
	188	//The item is not bulleted and there is a list what should be closed now.
	189	//So close the list
	190
	191	str << (m_is_ul ? wxT("</ul>") : wxT("</ol>"));
	192	//And mark as there is no an opened list
	193	m_list = false;
	194	}
	195
	196	// does the item have an indentation ?
	197	if( paraStyle.GetLeftIndent() )
	198	{
	199	if( paraStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_NONE )
	200	{
	201	if( m_indent )
	202	{
	203	if( (paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent()) == m_indent )
	204	{
	205	if( paraStyle.GetLeftSubIndent() < 0 )
	206	{
	207	str << SymbolicIndent(~paraStyle.GetLeftSubIndent());
	208	}
	209	}
	210	else
	211	{
	212	if( paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent() > m_indent )
	213	{
	214	Indent(paraStyle, str);
	215	m_indent = paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent();
	216	m_indents.Add( m_indent );
	217	}
	218	else
	219	{
	220	int i = m_indents.size() - 1;
	221	for(; i > -1; i--)
	222	{
	223	if( m_indent < (paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent()) )
	224	{
	225	Indent(paraStyle, str);
	226	m_indent = paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent();
	227	m_indents.Add( m_indent );
	228
	229	break;
	230	}
	231	else if( m_indent == (paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent()) )
	232	{
	233	if( paraStyle.GetLeftSubIndent() < 0 )
	234	{
	235	str << SymbolicIndent(~paraStyle.GetLeftSubIndent());
	236	}
	237	break;
	238	}
	239	else
	240	{
	241	str << wxT("</td></tr></table>");
	242
	243	m_indents.RemoveAt(i);
	244
	245	if( i < 1 ){m_indent=0; break;}
	246	m_indent = m_indents[i-1];
	247	}
	248	}
	249	}
	250	}
	251	}
	252	else
	253	{
	254	Indent(paraStyle, str);
	255	m_indent = paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent();
	256	m_indents.Add( m_indent );
	257	}
	258	}
	259	}
	260	else if( m_indent )
	261	{
	262	//The item is not indented and there is a table(s) what should be closed now.
	263
	264	//So close them
	265	for(unsigned int i = 0; i < m_indents.size(); i++ )
	266	str << wxT("</td></tr></table>");
	267
	268	m_indent = 0;
	269	m_indents.Clear();
	270	}
	271
	272
	273	wxString style;
	274
	275	//Is there any change on the font properties of the item
	276	if( thisStyle.GetFont().GetFaceName() != currentStyle.GetFont().GetFaceName() )
	277	style += wxString::Format(wxT(" face=\"%s\""), thisStyle.GetFont().GetFaceName().c_str());
	278	if( thisStyle.GetFont().GetPointSize() != currentStyle.GetFont().GetPointSize() )
	279	style += wxString::Format(wxT(" size=\"%ld\""), Pt_To_Size(thisStyle.GetFont().GetPointSize()) );
	280	if( thisStyle.GetTextColour() != currentStyle.GetTextColour() )
	281	style += wxString::Format(wxT(" color=\"%s\""), thisStyle.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX).c_str());
	282
	283	if( style.size() )
	284	{
	285	str << wxString::Format(wxT("<font %s >"), style.c_str());
	286	m_font = true;
	287	}
	288
	289	if( thisStyle.GetFont().GetWeight() == wxBOLD )
	290	str << wxT("<b>");
	291	if( thisStyle.GetFont().GetStyle() == wxITALIC )
	292	str << wxT("<i>");
	293	if( thisStyle.GetFont().GetUnderlined() )
	294	str << wxT("<u>");
	295	}
	296
	297	void wxRichTextHTMLHandler::EndCharacterFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, const wxTextAttrEx& WXUNUSED(paraStyle), wxOutputStream& stream)
	298	{
	299	wxTextOutputStream str(stream);
	300
	301	if( thisStyle.GetFont().GetUnderlined() )
	302	str << wxT("</u>");
	303	if( thisStyle.GetFont().GetStyle() == wxITALIC )
	304	str << wxT("</i>");
	305	if( thisStyle.GetFont().GetWeight() == wxBOLD )
	306	str << wxT("</b>");
	307
	308	if( m_font )
	309	{
	310	m_font = false;
	311	str << wxT("</font>");
	312	}
	313	}
	314
	315	/// Output paragraph formatting
	316	void wxRichTextHTMLHandler::OutputParagraphFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxOutputStream& stream)
	317	{
	318	//If there is no opened list currently, insert a <p> after every paragraph
	319	if(!m_list)
	320	{
	321	wxTextOutputStream str(stream);
	322	wxString align = GetAlignment( thisStyle );
	323	str << wxString::Format(wxT("<p align=\"%s\">"), align.c_str());
	324	}
	325	}
	326
	327	void wxRichTextHTMLHandler::NavigateToListPosition(const wxTextAttrEx& thisStyle, wxTextOutputStream& str)
	328	{
	329	//indenting an item using an ul/ol tag is equal to inserting 5 x   on its left side.
	330	//so we should start from 100 point left
	331
	332	//Is the second td's left wall of the current indentaion table at the 100+ point-left-side
	333	//of the item, horizontally?
	334	if( m_indent + 100 < thisStyle.GetLeftIndent() )
	335	{
	336	//yes it is
	337	LIndent(thisStyle, str);
	338	m_indent = thisStyle.GetLeftIndent() - 100;
	339	m_indents.Add( m_indent );
	340	return;
	341	}
	342	//No it isn't
	343
	344	int i = m_indents.size() - 1;
	345	for(; i > -1; i--)
	346	{
	347	//Is the second td's left wall of the current indentaion table at the 100+ point-left-side
	348	//of the item ?
	349	if( m_indent + 100 < thisStyle.GetLeftIndent() )
	350	{
	351	//Yes it is
	352	LIndent(thisStyle, str);
	353	m_indent = thisStyle.GetLeftIndent() - 100;
	354	m_indents.Add( m_indent );
	355	break;
	356	}
	357	else if( m_indent + 100 == thisStyle.GetLeftIndent() )
	358	break;//exact match
	359	else
	360	{
	361	//No it is not, the second td's left wall of the current indentaion table is at the
	362	//right side of the current item horizontally, so close it.
	363	str << wxT("</td></tr></table>");
	364
	365	m_indents.RemoveAt(i);
	366
	367	if( i < 1 ){m_indent=0; break;}
	368	m_indent = m_indents[i-1];
	369	}
	370	}
	371	}
	372	void wxRichTextHTMLHandler::Indent( const wxTextAttrEx& thisStyle, wxTextOutputStream& str )
	373	{
	374	//As a five year experienced web developer i assure you there is no way to indent an item
	375	//in html way, but we can use tables.
	376
	377
	378
	379	//Item -> "Hello world"
	380	//Its Left Indentation -> 100
	381	//Its Left Sub-Indentation ->40
	382	//A typical indentation-table for the item will be construct as the following
	383
	384	//3 x nbsp = 60
	385	//2 x nbsp = 40
	386	//LSI = Left Sub Indent
	387	//LI = Left Indent - LSI
	388	//
	389	//-------------------------------------------
	390	//\|  nbsp;\|nbsp;nbsp;Hello World \|
	391	//\| \| \| \| \|
	392	//\| V \| V \|
	393	//\| --LI-- \| --LSI-- \|
	394	//-------------------------------------------
	395
	396	str << wxT("<table width=\"100%\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr>");
	397
	398	wxString symbolic_indent = SymbolicIndent( (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent()) - m_indent );
	399	str << wxString::Format( wxT("<td>%s</td>"), symbolic_indent.c_str() );
	400	str << wxT("<td width=\"100%\">");
	401
	402	if( thisStyle.GetLeftSubIndent() < 0 )
	403	{
	404	str << SymbolicIndent(~thisStyle.GetLeftSubIndent());
	405	}
	406	}
	407
	408	void wxRichTextHTMLHandler::LIndent( const wxTextAttrEx& thisStyle, wxTextOutputStream& str )
	409	{
	410	//Code:
	411	//r.BeginNumberedBullet(1, 200, 60);
	412	//r.Newline();
	413	//r.WriteText(wxT("first item"));
	414	//r.EndNumberedBullet();
	415	//r.BeginNumberedBullet(2, 200, 60);
	416	//r.Newline();
	417	//r.WriteText(wxT("second item."));
	418	//r.EndNumberedBullet();
	419	//
	420	//A typical indentation-table for the item will be construct as the following
	421
	422	//1 x nbsp = 20 point
	423	//ULI -> 100pt (UL/OL tag indents its sub element by 100 point)
	424	//<--------- 100 pt ---------->\|
	425	//------------------------------------------------------
	426	//\|  nbsp; nbsp;\|<ul> \|
	427	//\| \|<-ULI-><li>first item \|
	428	//\| \|<-ULI-><li>second item \|
	429	//\| \|</ul> \|
	430	//------------------------------------------------------
	431	// \|<-100->\|
	432
	433
	434	str << wxT("<table width=\"100%\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr>");
	435
	436	wxString symbolic_indent = SymbolicIndent( (thisStyle.GetLeftIndent() - m_indent) - 100);
	437	str << wxString::Format( wxT("<td>%s</td>"), symbolic_indent.c_str() );
	438	str << wxT("<td width=\"100%\">");
	439	}
	440
	441	void wxRichTextHTMLHandler::TypeOfList( const wxTextAttrEx& thisStyle, wxString& tag )
	442	{
	443	//We can use number attribute of li tag but not all the browsers support it.
	444	//also wxHtmlWindow doesn't support type attribute.
	445
	446	m_is_ul = false;
	447	if( thisStyle.GetBulletStyle() == (wxTEXT_ATTR_BULLET_STYLE_ARABIC\|wxTEXT_ATTR_BULLET_STYLE_PERIOD))
	448	tag = wxT("<ol type=\"1\">");
	449	else if( thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_UPPER )
	450	tag = wxT("<ol type=\"A\">");
	451	else if( thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_LOWER )
	452	tag = wxT("<ol type=\"a\">");
	453	else if( thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_UPPER )
	454	tag = wxT("<ol type=\"I\">");
	455	else if( thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_LOWER )
	456	tag = wxT("<ol type=\"i\">");
	457	else
	458	{
	459	tag = wxT("<ul>");
	460	m_is_ul = true;
	461	}
	462	}
	463
	464	wxString wxRichTextHTMLHandler::GetAlignment( const wxTextAttrEx& thisStyle )
	465	{
	466	switch( thisStyle.GetAlignment() )
	467	{
	468	case wxTEXT_ALIGNMENT_LEFT:
	469	return wxT("left");
	470	case wxTEXT_ALIGNMENT_RIGHT:
	471	return wxT("right");
	472	case wxTEXT_ALIGNMENT_CENTER:
	473	return wxT("center");
	474	case wxTEXT_ALIGNMENT_JUSTIFIED:
	475	return wxT("justify");
	476	default:
	477	return wxT("left");
	478	}
	479	}
	480
	481	void wxRichTextHTMLHandler::Image_to_Base64(wxRichTextImage* image, wxOutputStream& stream)
	482	{
	483	wxTextOutputStream str(stream);
	484
	485	str << wxT("<img src=\"");
	486	str << wxT("data:");
	487	str << GetMimeType(image->GetImageBlock().GetImageType());
	488	str << wxT(";base64,");
	489
	490	if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
	491	image->MakeBlock();
	492
	493	wxChar* data = b64enc( image->GetImageBlock().GetData(), image->GetImageBlock().GetDataSize() );
	494	str << data;
	495
	496	delete[] data;
	497
	498	str << wxT("\" />");
	499	}
	500
	501	long wxRichTextHTMLHandler::Pt_To_Size(long size)
	502	{
	503	//return most approximate size
	504	if(size < 9 ) return 1;
	505	else if( size < 11 ) return 2;
	506	else if( size < 14 ) return 3;
	507	else if( size < 18 ) return 4;
	508	else if( size < 23 ) return 5;
	509	else if( size < 30 ) return 6;
	510	else return 7;
	511	}
	512
	513	wxString wxRichTextHTMLHandler::SymbolicIndent(long indent)
	514	{
	515	wxString in;
	516	for(;indent > 0; indent -= 20)
	517	in.Append( wxT(" ") );
	518	return in;
	519	}
	520
	521	const wxChar* wxRichTextHTMLHandler::GetMimeType(int imageType)
	522	{
	523	switch(imageType)
	524	{
	525	case wxBITMAP_TYPE_BMP:
	526	return wxT("image/bmp");
	527	case wxBITMAP_TYPE_TIF:
	528	return wxT("image/tiff");
	529	case wxBITMAP_TYPE_GIF:
	530	return wxT("image/gif");
	531	case wxBITMAP_TYPE_PNG:
	532	return wxT("image/png");
	533	case wxBITMAP_TYPE_JPEG:
	534	return wxT("image/jpeg");
	535	default:
	536	return wxT("image/unknown");
	537	}
	538	}
	539
	540	//exim-style base64 encoder
	541	wxChar* wxRichTextHTMLHandler::b64enc( unsigned char* input, size_t in_len )
	542	{
	543	//elements of enc64 array must be 8 bit values
	544	//otherwise encoder will fail
	545	//hmmm.. Does wxT macro define a char as 16 bit value
	546	//when compiling with UNICODE option?
	547	static const wxChar enc64[] = wxT("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
	548	wxChar* output = new wxChar[4*((in_len+2)/3)+1];
	549	wxChar* p = output;
	550
	551	while( in_len-- > 0 )
	552	{
	553	register wxChar a, b;
	554
	555	a = *input++;
	556
	557	*p++ = enc64[ (a >> 2) & 0x3f ];
	558
	559	if( in_len-- == 0 )
	560	{
	561	*p++ = enc64[ (a << 4 ) & 0x30 ];
	562	*p++ = '=';
	563	*p++ = '=';
	564	break;
	565	}
	566
	567	b = *input++;
	568
	569	*p++ = enc64[(( a << 4 ) \| ((b >> 4) &0xf )) & 0x3f];
	570
	571	if( in_len-- == 0 )
	572	{
	573	*p++ = enc64[ (b << 2) & 0x3f ];
	574	*p++ = '=';
	575	break;
	576	}
	577
	578	a = *input++;
	579
	580	*p++ = enc64[ ((( b << 2 ) & 0x3f ) \| ((a >> 6)& 0x3)) & 0x3f ];
	581
	582	*p++ = enc64[ a & 0x3f ];
	583	}
	584	*p = 0;
	585
	586	return output;
	587	}
	588	#endif
	589	// wxUSE_STREAMS
	590
	591	#endif
	592	// wxUSE_RICHTEXT