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"
#include "wx/richtext/richtextstyles.h"

#ifndef WX_PRECOMP
#endif

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

#if wxUSE_FILESYSTEM
#include "wx/filesys.h"
#include "wx/fs_mem.h"
#endif

IMPLEMENT_DYNAMIC_CLASS(wxRichTextHTMLHandler, wxRichTextFileHandler)

int wxRichTextHTMLHandler::sm_fileCounter = 1;

wxRichTextHTMLHandler::wxRichTextHTMLHandler(const wxString& name, const wxString& ext, int type)
    : wxRichTextFileHandler(name, ext, type), m_buffer(NULL), m_font(false), m_inTable(false)
{
    m_fontSizeMapping.Add(8);
    m_fontSizeMapping.Add(10);
    m_fontSizeMapping.Add(13);
    m_fontSizeMapping.Add(17);
    m_fontSizeMapping.Add(22);
    m_fontSizeMapping.Add(30);
    m_fontSizeMapping.Add(100);
}

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

    ClearTemporaryImageLocations();

    buffer->Defragment();

#if wxUSE_UNICODE
    wxCSConv* customEncoding = NULL;
    wxMBConv* conv = NULL;
    if (!GetEncoding().IsEmpty())
    {
        customEncoding = new wxCSConv(GetEncoding());
        if (!customEncoding->IsOk())
        {
            wxDELETE(customEncoding);
        }
    }
    if (customEncoding)
        conv = customEncoding;
    else
        conv = & wxConvUTF8;
#endif

    {
#if wxUSE_UNICODE
        wxTextOutputStream str(stream, wxEOL_NATIVE, *conv);
#else
        wxTextOutputStream str(stream, wxEOL_NATIVE);
#endif

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

        if ((GetFlags() & wxRICHTEXT_HANDLER_NO_HEADER_FOOTER) == 0)
            str << wxT("<html><head></head><body>\n");

        OutputFont(currentParaStyle, str);

        m_font = false;
        m_inTable = false;

        m_indents.Clear();
        m_listTypes.Clear();

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

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

                BeginParagraphFormatting(currentParaStyle, paraStyle, str);

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

                        wxString text = textObj->GetText();

                        if (charStyle.HasTextEffects() && (charStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_CAPITALS))
                            text.MakeUpper();

                        wxString toReplace = wxRichTextLineBreakChar;
                        text.Replace(toReplace, wxT("<br>"));

                        str << text;

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

                    wxRichTextImage* image = wxDynamicCast(obj, wxRichTextImage);
                    if( image && (!image->IsEmpty() || image->GetImageBlock().GetData()))
                        WriteImage( image, stream );

                    node2 = node2->GetNext();
                }

                EndParagraphFormatting(currentParaStyle, paraStyle, str);

                str << wxT("\n");
            }
            node = node->GetNext();
        }

        CloseLists(-1, str);

        str << wxT("</font>");

        if ((GetFlags() & wxRICHTEXT_HANDLER_NO_HEADER_FOOTER) == 0)
            str << wxT("</body></html>");

        str << wxT("\n");
    }

#if wxUSE_UNICODE
    if (customEncoding)
        delete customEncoding;
#endif

    m_buffer = NULL;

    return true;
}

void wxRichTextHTMLHandler::BeginCharacterFormatting(const wxRichTextAttr& currentStyle, const wxRichTextAttr& thisStyle, const wxRichTextAttr& WXUNUSED(paraStyle), wxTextOutputStream& str)
{
    wxString style;

    // Is there any change in the font properties of the item?
    if (thisStyle.GetFontFaceName() != currentStyle.GetFontFaceName())
    {
        wxString faceName(thisStyle.GetFontFaceName());
        style += wxString::Format(wxT(" face=\"%s\""), faceName.c_str());
    }
    if (thisStyle.GetFontSize() != currentStyle.GetFontSize())
        style += wxString::Format(wxT(" size=\"%ld\""), PtToSize(thisStyle.GetFontSize()));

    bool bTextColourChanged = (thisStyle.GetTextColour() != currentStyle.GetTextColour());
    bool bBackgroundColourChanged = (thisStyle.GetBackgroundColour() != currentStyle.GetBackgroundColour());
    if (bTextColourChanged || bBackgroundColourChanged)
    {
        style += wxT(" style=\"");

        if (bTextColourChanged)
        {
            wxString color(thisStyle.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX));
            style += wxString::Format(wxT("color: %s"), color.c_str());
        }
        if (bTextColourChanged && bBackgroundColourChanged)
            style += wxT(";");
        if (bBackgroundColourChanged)
        {
            wxString color(thisStyle.GetBackgroundColour().GetAsString(wxC2S_HTML_SYNTAX));
            style += wxString::Format(wxT("background-color: %s"), color.c_str());
        }

        style += wxT("\"");
    }

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

    if (thisStyle.GetFontWeight() == wxBOLD)
        str << wxT("<b>");
    if (thisStyle.GetFontStyle() == wxITALIC)
        str << wxT("<i>");
    if (thisStyle.GetFontUnderlined())
        str << wxT("<u>");

    if (thisStyle.HasURL())
        str << wxT("<a href=\"") << thisStyle.GetURL() << wxT("\">");

    if (thisStyle.HasTextEffects())
    {
        if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_STRIKETHROUGH)
            str << wxT("<del>");
        if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_SUPERSCRIPT)
            str << wxT("<sup>");
        if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_SUBSCRIPT)
            str << wxT("<sub>");
    }
}

void wxRichTextHTMLHandler::EndCharacterFormatting(const wxRichTextAttr& WXUNUSED(currentStyle), const wxRichTextAttr& thisStyle, const wxRichTextAttr& WXUNUSED(paraStyle), wxTextOutputStream& stream)
{
    if (thisStyle.HasURL())
        stream << wxT("</a>");

    if (thisStyle.GetFontUnderlined())
        stream << wxT("</u>");
    if (thisStyle.GetFontStyle() == wxITALIC)
        stream << wxT("</i>");
    if (thisStyle.GetFontWeight() == wxBOLD)
        stream << wxT("</b>");

    if (thisStyle.HasTextEffects())
    {
        if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_STRIKETHROUGH)
            stream << wxT("</del>");
        if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_SUPERSCRIPT)
            stream << wxT("</sup>");
        if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_SUBSCRIPT)
            stream << wxT("</sub>");
    }

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

/// Begin paragraph formatting
void wxRichTextHTMLHandler::BeginParagraphFormatting(const wxRichTextAttr& WXUNUSED(currentStyle), const wxRichTextAttr& thisStyle, wxTextOutputStream& str)
{
    if (thisStyle.HasPageBreak())
    {
        str << wxT("<div style=\"page-break-after:always\"></div>\n");
    }

    if (thisStyle.HasLeftIndent() && thisStyle.GetLeftIndent() != 0)
    {
        if (thisStyle.HasBulletStyle())
        {
            int indent = thisStyle.GetLeftIndent();

            // Close levels high than this
            CloseLists(indent, str);

            if (m_indents.GetCount() > 0 && indent == m_indents.Last())
            {
                // Same level, no need to start a new list
            }
            else if (m_indents.GetCount() == 0 || indent > m_indents.Last())
            {
                m_indents.Add(indent);

                wxString tag;
                int listType = TypeOfList(thisStyle, tag);
                m_listTypes.Add(listType);

                // wxHTML needs an extra <p> before a list when using <p> ... </p> in previous paragraphs.
                // TODO: pass a flag that indicates we're using wxHTML.
                str << wxT("<p>\n");

                str << tag;
            }

            str << wxT("<li> ");
        }
        else
        {
            CloseLists(-1, str);

            wxString align = GetAlignment(thisStyle);
            str << wxString::Format(wxT("<p align=\"%s\""), align.c_str());

            wxString styleStr;

            if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingBefore())
            {
                float spacingBeforeMM = thisStyle.GetParagraphSpacingBefore() / 10.0;

                styleStr += wxString::Format(wxT("margin-top: %.2fmm; "), spacingBeforeMM);
            }
            if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingAfter())
            {
                float spacingAfterMM = thisStyle.GetParagraphSpacingAfter() / 10.0;

                styleStr += wxString::Format(wxT("margin-bottom: %.2fmm; "), spacingAfterMM);
            }

            float indentLeftMM = (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent())/10.0;
            if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && (indentLeftMM > 0.0))
            {
                styleStr += wxString::Format(wxT("margin-left: %.2fmm; "), indentLeftMM);
            }
            float indentRightMM = thisStyle.GetRightIndent()/10.0;
            if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasRightIndent() && (indentRightMM > 0.0))
            {
                styleStr += wxString::Format(wxT("margin-right: %.2fmm; "), indentRightMM);
            }
            // First line indentation
            float firstLineIndentMM = - thisStyle.GetLeftSubIndent() / 10.0;
            if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && (firstLineIndentMM > 0.0))
            {
                styleStr += wxString::Format(wxT("text-indent: %.2fmm; "), firstLineIndentMM);
            }

            if (!styleStr.IsEmpty())
                str << wxT(" style=\"") << styleStr << wxT("\"");

            str << wxT(">");

            // TODO: convert to pixels
            int indentPixels = static_cast<int>(indentLeftMM*10/4);

            if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) == 0)
            {
                // Use a table to do indenting if we don't have CSS
                str << wxString::Format(wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td width=\"%d\"></td><td>"), indentPixels);
                m_inTable = true;
            }

            if (((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) == 0) && (thisStyle.GetLeftSubIndent() < 0))
            {
                str << SymbolicIndent( - thisStyle.GetLeftSubIndent());
            }
        }
    }
    else
    {
        CloseLists(-1, str);

        wxString align = GetAlignment(thisStyle);
        str << wxString::Format(wxT("<p align=\"%s\""), align.c_str());

        wxString styleStr;

        if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingBefore())
        {
            float spacingBeforeMM = thisStyle.GetParagraphSpacingBefore() / 10.0;

            styleStr += wxString::Format(wxT("margin-top: %.2fmm; "), spacingBeforeMM);
        }
        if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingAfter())
        {
            float spacingAfterMM = thisStyle.GetParagraphSpacingAfter() / 10.0;

            styleStr += wxString::Format(wxT("margin-bottom: %.2fmm; "), spacingAfterMM);
        }

        if (!styleStr.IsEmpty())
            str << wxT(" style=\"") << styleStr << wxT("\"");

        str << wxT(">");
    }
    OutputFont(thisStyle, str);
}

/// End paragraph formatting
void wxRichTextHTMLHandler::EndParagraphFormatting(const wxRichTextAttr& WXUNUSED(currentStyle), const wxRichTextAttr& thisStyle, wxTextOutputStream& stream)
{
    if (thisStyle.HasFont())
        stream << wxT("</font>");

    if (m_inTable)
    {
        stream << wxT("</td></tr></table></p>\n");
        m_inTable = false;
    }
    else if (!thisStyle.HasBulletStyle())
        stream << wxT("</p>\n");
}

/// Closes lists to level (-1 means close all)
void wxRichTextHTMLHandler::CloseLists(int level, wxTextOutputStream& str)
{
    // Close levels high than this
    int i = m_indents.GetCount()-1;
    while (i >= 0)
    {
        int l = m_indents[i];
        if (l > level)
        {
            if (m_listTypes[i] == 0)
                str << wxT("</ol>");
            else
                str << wxT("</ul>");
            m_indents.RemoveAt(i);
            m_listTypes.RemoveAt(i);
        }
        else
            break;
        i --;
     }
}

/// Output font tag
void wxRichTextHTMLHandler::OutputFont(const wxRichTextAttr& style, wxTextOutputStream& stream)
{
    if (style.HasFont())
    {
        stream << wxString::Format(wxT("<font face=\"%s\" size=\"%ld\""), style.GetFontFaceName().c_str(), PtToSize(style.GetFontSize()));
        if (style.HasTextColour())
            stream << wxString::Format(wxT(" color=\"%s\""), style.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX).c_str());
        stream << wxT(" >");
    }
}

int wxRichTextHTMLHandler::TypeOfList( const wxRichTextAttr& 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.

    bool 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;
    }

    if (m_is_ul)
        return 1;
    else
        return 0;
}

wxString wxRichTextHTMLHandler::GetAlignment( const wxRichTextAttr& 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::WriteImage(wxRichTextImage* image, wxOutputStream& stream)
{
    wxTextOutputStream str(stream);

    str << wxT("<img src=\"");

#if wxUSE_FILESYSTEM
    if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
    {
#if 0
        if (!image->GetImage().IsOk() && image->GetImageBlock().GetData())
            image->LoadFromBlock();
        if (image->GetImage().IsOk() && !image->GetImageBlock().GetData())
            image->MakeBlock();
#endif

        if (image->GetImageBlock().IsOk())
        {
            wxImage img;
            image->GetImageBlock().Load(img);
            if (img.IsOk())
            {
                wxString ext(image->GetImageBlock().GetExtension());
                wxString tempFilename(wxString::Format(wxT("image%d.%s"), sm_fileCounter, ext));
                wxMemoryFSHandler::AddFile(tempFilename, img, image->GetImageBlock().GetImageType());

                m_imageLocations.Add(tempFilename);

                str << wxT("memory:") << tempFilename;
            }
        }
        else
            str << wxT("memory:?");

        sm_fileCounter ++;
    }
    else if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
    {
#if 0
        if (!image->GetImage().IsOk() && image->GetImageBlock().GetData())
            image->LoadFromBlock();
        if (image->GetImage().IsOk() && !image->GetImageBlock().GetData())
            image->MakeBlock();
#endif

        if (image->GetImageBlock().IsOk())
        {
            wxString tempDir(GetTempDir());
            if (tempDir.IsEmpty())
                tempDir = wxFileName::GetTempDir();

            wxString ext(image->GetImageBlock().GetExtension());
            wxString tempFilename(wxString::Format(wxT("%s/image%d.%s"), tempDir, sm_fileCounter, ext));
            image->GetImageBlock().Write(tempFilename);

            m_imageLocations.Add(tempFilename);

            str << wxFileSystem::FileNameToURL(tempFilename);
        }
        else
            str << wxT("file:?");

        sm_fileCounter ++;
    }
    else // if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_BASE64) // this is implied
#endif
    {
        str << wxT("data:");
        str << GetMimeType(image->GetImageBlock().GetImageType());
        str << wxT(";base64,");
#if 0
        if (image->GetImage().IsOk() && !image->GetImageBlock().GetData())
            image->MakeBlock();
#endif
        if (image->GetImageBlock().IsOk())
        {
            wxChar* data = b64enc( image->GetImageBlock().GetData(), image->GetImageBlock().GetDataSize() );
            str << data;

            delete[] data;
        }
    }

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

long wxRichTextHTMLHandler::PtToSize(long size)
{
    int i;
    int len = m_fontSizeMapping.GetCount();
    for (i = 0; i < len; i++)
        if (size <= m_fontSizeMapping[i])
            return i+1;
    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_TIFF:
        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

/// Delete the in-memory or temporary files generated by the last operation
bool wxRichTextHTMLHandler::DeleteTemporaryImages()
{
    return DeleteTemporaryImages(GetFlags(), m_imageLocations);
}

/// Delete the in-memory or temporary files generated by the last operation
bool wxRichTextHTMLHandler::DeleteTemporaryImages(int flags, const wxArrayString& imageLocations)
{
    size_t i;
    for (i = 0; i < imageLocations.GetCount(); i++)
    {
        wxString location = imageLocations[i];

        if (flags & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
        {
#if wxUSE_FILESYSTEM
            wxMemoryFSHandler::RemoveFile(location);
#endif
        }
        else if (flags & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
        {
            if (wxFileExists(location))
                wxRemoveFile(location);
        }
    }

    return true;
}


#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	#include "wx/richtext/richtextstyles.h"
	23
	24	#ifndef WX_PRECOMP
	25	#endif
	26
	27	#include "wx/filename.h"
	28	#include "wx/wfstream.h"
	29	#include "wx/txtstrm.h"
	30
	31	#if wxUSE_FILESYSTEM
	32	#include "wx/filesys.h"
	33	#include "wx/fs_mem.h"
	34	#endif
	35
	36	IMPLEMENT_DYNAMIC_CLASS(wxRichTextHTMLHandler, wxRichTextFileHandler)
	37
	38	int wxRichTextHTMLHandler::sm_fileCounter = 1;
	39
	40	wxRichTextHTMLHandler::wxRichTextHTMLHandler(const wxString& name, const wxString& ext, int type)
	41	: wxRichTextFileHandler(name, ext, type), m_buffer(NULL), m_font(false), m_inTable(false)
	42	{
	43	m_fontSizeMapping.Add(8);
	44	m_fontSizeMapping.Add(10);
	45	m_fontSizeMapping.Add(13);
	46	m_fontSizeMapping.Add(17);
	47	m_fontSizeMapping.Add(22);
	48	m_fontSizeMapping.Add(30);
	49	m_fontSizeMapping.Add(100);
	50	}
	51
	52	/// Can we handle this filename (if using files)? By default, checks the extension.
	53	bool wxRichTextHTMLHandler::CanHandle(const wxString& filename) const
	54	{
	55	wxString path, file, ext;
	56	wxFileName::SplitPath(filename, & path, & file, & ext);
	57
	58	return (ext.Lower() == wxT("html") \|\| ext.Lower() == wxT("htm"));
	59	}
	60
	61
	62	#if wxUSE_STREAMS
	63	bool wxRichTextHTMLHandler::DoLoadFile(wxRichTextBuffer *WXUNUSED(buffer), wxInputStream& WXUNUSED(stream))
	64	{
	65	return false;
	66	}
	67
	68	/*
	69	* We need to output only _changes_ in character formatting.
	70	*/
	71
	72	bool wxRichTextHTMLHandler::DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream& stream)
	73	{
	74	m_buffer = buffer;
	75
	76	ClearTemporaryImageLocations();
	77
	78	buffer->Defragment();
	79
	80	#if wxUSE_UNICODE
	81	wxCSConv* customEncoding = NULL;
	82	wxMBConv* conv = NULL;
	83	if (!GetEncoding().IsEmpty())
	84	{
	85	customEncoding = new wxCSConv(GetEncoding());
	86	if (!customEncoding->IsOk())
	87	{
	88	wxDELETE(customEncoding);
	89	}
	90	}
	91	if (customEncoding)
	92	conv = customEncoding;
	93	else
	94	conv = & wxConvUTF8;
	95	#endif
	96
	97	{
	98	#if wxUSE_UNICODE
	99	wxTextOutputStream str(stream, wxEOL_NATIVE, *conv);
	100	#else
	101	wxTextOutputStream str(stream, wxEOL_NATIVE);
	102	#endif
	103
	104	wxRichTextAttr currentParaStyle = buffer->GetAttributes();
	105	wxRichTextAttr currentCharStyle = buffer->GetAttributes();
	106
	107	if ((GetFlags() & wxRICHTEXT_HANDLER_NO_HEADER_FOOTER) == 0)
	108	str << wxT("<html><head></head><body>\n");
	109
	110	OutputFont(currentParaStyle, str);
	111
	112	m_font = false;
	113	m_inTable = false;
	114
	115	m_indents.Clear();
	116	m_listTypes.Clear();
	117
	118	wxRichTextObjectList::compatibility_iterator node = buffer->GetChildren().GetFirst();
	119	while (node)
	120	{
	121	wxRichTextParagraph* para = wxDynamicCast(node->GetData(), wxRichTextParagraph);
	122	wxASSERT (para != NULL);
	123
	124	if (para)
	125	{
	126	wxRichTextAttr paraStyle(para->GetCombinedAttributes());
	127
	128	BeginParagraphFormatting(currentParaStyle, paraStyle, str);
	129
	130	wxRichTextObjectList::compatibility_iterator node2 = para->GetChildren().GetFirst();
	131	while (node2)
	132	{
	133	wxRichTextObject* obj = node2->GetData();
	134	wxRichTextPlainText* textObj = wxDynamicCast(obj, wxRichTextPlainText);
	135	if (textObj && !textObj->IsEmpty())
	136	{
	137	wxRichTextAttr charStyle(para->GetCombinedAttributes(obj->GetAttributes()));
	138	BeginCharacterFormatting(currentCharStyle, charStyle, paraStyle, str);
	139
	140	wxString text = textObj->GetText();
	141
	142	if (charStyle.HasTextEffects() && (charStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_CAPITALS))
	143	text.MakeUpper();
	144
	145	wxString toReplace = wxRichTextLineBreakChar;
	146	text.Replace(toReplace, wxT("<br>"));
	147
	148	str << text;
	149
	150	EndCharacterFormatting(currentCharStyle, charStyle, paraStyle, str);
	151	}
	152
	153	wxRichTextImage* image = wxDynamicCast(obj, wxRichTextImage);
	154	if( image && (!image->IsEmpty() \|\| image->GetImageBlock().GetData()))
	155	WriteImage( image, stream );
	156
	157	node2 = node2->GetNext();
	158	}
	159
	160	EndParagraphFormatting(currentParaStyle, paraStyle, str);
	161
	162	str << wxT("\n");
	163	}
	164	node = node->GetNext();
	165	}
	166
	167	CloseLists(-1, str);
	168
	169	str << wxT("</font>");
	170
	171	if ((GetFlags() & wxRICHTEXT_HANDLER_NO_HEADER_FOOTER) == 0)
	172	str << wxT("</body></html>");
	173
	174	str << wxT("\n");
	175	}
	176
	177	#if wxUSE_UNICODE
	178	if (customEncoding)
	179	delete customEncoding;
	180	#endif
	181
	182	m_buffer = NULL;
	183
	184	return true;
	185	}
	186
	187	void wxRichTextHTMLHandler::BeginCharacterFormatting(const wxRichTextAttr& currentStyle, const wxRichTextAttr& thisStyle, const wxRichTextAttr& WXUNUSED(paraStyle), wxTextOutputStream& str)
	188	{
	189	wxString style;
	190
	191	// Is there any change in the font properties of the item?
	192	if (thisStyle.GetFontFaceName() != currentStyle.GetFontFaceName())
	193	{
	194	wxString faceName(thisStyle.GetFontFaceName());
	195	style += wxString::Format(wxT(" face=\"%s\""), faceName.c_str());
	196	}
	197	if (thisStyle.GetFontSize() != currentStyle.GetFontSize())
	198	style += wxString::Format(wxT(" size=\"%ld\""), PtToSize(thisStyle.GetFontSize()));
	199
	200	bool bTextColourChanged = (thisStyle.GetTextColour() != currentStyle.GetTextColour());
	201	bool bBackgroundColourChanged = (thisStyle.GetBackgroundColour() != currentStyle.GetBackgroundColour());
	202	if (bTextColourChanged \|\| bBackgroundColourChanged)
	203	{
	204	style += wxT(" style=\"");
	205
	206	if (bTextColourChanged)
	207	{
	208	wxString color(thisStyle.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX));
	209	style += wxString::Format(wxT("color: %s"), color.c_str());
	210	}
	211	if (bTextColourChanged && bBackgroundColourChanged)
	212	style += wxT(";");
	213	if (bBackgroundColourChanged)
	214	{
	215	wxString color(thisStyle.GetBackgroundColour().GetAsString(wxC2S_HTML_SYNTAX));
	216	style += wxString::Format(wxT("background-color: %s"), color.c_str());
	217	}
	218
	219	style += wxT("\"");
	220	}
	221
	222	if (style.size())
	223	{
	224	str << wxString::Format(wxT("<font %s >"), style.c_str());
	225	m_font = true;
	226	}
	227
	228	if (thisStyle.GetFontWeight() == wxBOLD)
	229	str << wxT("<b>");
	230	if (thisStyle.GetFontStyle() == wxITALIC)
	231	str << wxT("<i>");
	232	if (thisStyle.GetFontUnderlined())
	233	str << wxT("<u>");
	234
	235	if (thisStyle.HasURL())
	236	str << wxT("<a href=\"") << thisStyle.GetURL() << wxT("\">");
	237
	238	if (thisStyle.HasTextEffects())
	239	{
	240	if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_STRIKETHROUGH)
	241	str << wxT("<del>");
	242	if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_SUPERSCRIPT)
	243	str << wxT("<sup>");
	244	if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_SUBSCRIPT)
	245	str << wxT("<sub>");
	246	}
	247	}
	248
	249	void wxRichTextHTMLHandler::EndCharacterFormatting(const wxRichTextAttr& WXUNUSED(currentStyle), const wxRichTextAttr& thisStyle, const wxRichTextAttr& WXUNUSED(paraStyle), wxTextOutputStream& stream)
	250	{
	251	if (thisStyle.HasURL())
	252	stream << wxT("</a>");
	253
	254	if (thisStyle.GetFontUnderlined())
	255	stream << wxT("</u>");
	256	if (thisStyle.GetFontStyle() == wxITALIC)
	257	stream << wxT("</i>");
	258	if (thisStyle.GetFontWeight() == wxBOLD)
	259	stream << wxT("</b>");
	260
	261	if (thisStyle.HasTextEffects())
	262	{
	263	if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_STRIKETHROUGH)
	264	stream << wxT("</del>");
	265	if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_SUPERSCRIPT)
	266	stream << wxT("</sup>");
	267	if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_SUBSCRIPT)
	268	stream << wxT("</sub>");
	269	}
	270
	271	if (m_font)
	272	{
	273	m_font = false;
	274	stream << wxT("</font>");
	275	}
	276	}
	277
	278	/// Begin paragraph formatting
	279	void wxRichTextHTMLHandler::BeginParagraphFormatting(const wxRichTextAttr& WXUNUSED(currentStyle), const wxRichTextAttr& thisStyle, wxTextOutputStream& str)
	280	{
	281	if (thisStyle.HasPageBreak())
	282	{
	283	str << wxT("<div style=\"page-break-after:always\"></div>\n");
	284	}
	285
	286	if (thisStyle.HasLeftIndent() && thisStyle.GetLeftIndent() != 0)
	287	{
	288	if (thisStyle.HasBulletStyle())
	289	{
	290	int indent = thisStyle.GetLeftIndent();
	291
	292	// Close levels high than this
	293	CloseLists(indent, str);
	294
	295	if (m_indents.GetCount() > 0 && indent == m_indents.Last())
	296	{
	297	// Same level, no need to start a new list
	298	}
	299	else if (m_indents.GetCount() == 0 \|\| indent > m_indents.Last())
	300	{
	301	m_indents.Add(indent);
	302
	303	wxString tag;
	304	int listType = TypeOfList(thisStyle, tag);
	305	m_listTypes.Add(listType);
	306
	307	// wxHTML needs an extra <p> before a list when using <p> ... </p> in previous paragraphs.
	308	// TODO: pass a flag that indicates we're using wxHTML.
	309	str << wxT("<p>\n");
	310
	311	str << tag;
	312	}
	313
	314	str << wxT("<li> ");
	315	}
	316	else
	317	{
	318	CloseLists(-1, str);
	319
	320	wxString align = GetAlignment(thisStyle);
	321	str << wxString::Format(wxT("<p align=\"%s\""), align.c_str());
	322
	323	wxString styleStr;
	324
	325	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingBefore())
	326	{
	327	float spacingBeforeMM = thisStyle.GetParagraphSpacingBefore() / 10.0;
	328
	329	styleStr += wxString::Format(wxT("margin-top: %.2fmm; "), spacingBeforeMM);
	330	}
	331	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingAfter())
	332	{
	333	float spacingAfterMM = thisStyle.GetParagraphSpacingAfter() / 10.0;
	334
	335	styleStr += wxString::Format(wxT("margin-bottom: %.2fmm; "), spacingAfterMM);
	336	}
	337
	338	float indentLeftMM = (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent())/10.0;
	339	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && (indentLeftMM > 0.0))
	340	{
	341	styleStr += wxString::Format(wxT("margin-left: %.2fmm; "), indentLeftMM);
	342	}
	343	float indentRightMM = thisStyle.GetRightIndent()/10.0;
	344	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasRightIndent() && (indentRightMM > 0.0))
	345	{
	346	styleStr += wxString::Format(wxT("margin-right: %.2fmm; "), indentRightMM);
	347	}
	348	// First line indentation
	349	float firstLineIndentMM = - thisStyle.GetLeftSubIndent() / 10.0;
	350	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && (firstLineIndentMM > 0.0))
	351	{
	352	styleStr += wxString::Format(wxT("text-indent: %.2fmm; "), firstLineIndentMM);
	353	}
	354
	355	if (!styleStr.IsEmpty())
	356	str << wxT(" style=\"") << styleStr << wxT("\"");
	357
	358	str << wxT(">");
	359
	360	// TODO: convert to pixels
	361	int indentPixels = static_cast<int>(indentLeftMM*10/4);
	362
	363	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) == 0)
	364	{
	365	// Use a table to do indenting if we don't have CSS
	366	str << wxString::Format(wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td width=\"%d\"></td><td>"), indentPixels);
	367	m_inTable = true;
	368	}
	369
	370	if (((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) == 0) && (thisStyle.GetLeftSubIndent() < 0))
	371	{
	372	str << SymbolicIndent( - thisStyle.GetLeftSubIndent());
	373	}
	374	}
	375	}
	376	else
	377	{
	378	CloseLists(-1, str);
	379
	380	wxString align = GetAlignment(thisStyle);
	381	str << wxString::Format(wxT("<p align=\"%s\""), align.c_str());
	382
	383	wxString styleStr;
	384
	385	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingBefore())
	386	{
	387	float spacingBeforeMM = thisStyle.GetParagraphSpacingBefore() / 10.0;
	388
	389	styleStr += wxString::Format(wxT("margin-top: %.2fmm; "), spacingBeforeMM);
	390	}
	391	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingAfter())
	392	{
	393	float spacingAfterMM = thisStyle.GetParagraphSpacingAfter() / 10.0;
	394
	395	styleStr += wxString::Format(wxT("margin-bottom: %.2fmm; "), spacingAfterMM);
	396	}
	397
	398	if (!styleStr.IsEmpty())
	399	str << wxT(" style=\"") << styleStr << wxT("\"");
	400
	401	str << wxT(">");
	402	}
	403	OutputFont(thisStyle, str);
	404	}
	405
	406	/// End paragraph formatting
	407	void wxRichTextHTMLHandler::EndParagraphFormatting(const wxRichTextAttr& WXUNUSED(currentStyle), const wxRichTextAttr& thisStyle, wxTextOutputStream& stream)
	408	{
	409	if (thisStyle.HasFont())
	410	stream << wxT("</font>");
	411
	412	if (m_inTable)
	413	{
	414	stream << wxT("</td></tr></table></p>\n");
	415	m_inTable = false;
	416	}
	417	else if (!thisStyle.HasBulletStyle())
	418	stream << wxT("</p>\n");
	419	}
	420
	421	/// Closes lists to level (-1 means close all)
	422	void wxRichTextHTMLHandler::CloseLists(int level, wxTextOutputStream& str)
	423	{
	424	// Close levels high than this
	425	int i = m_indents.GetCount()-1;
	426	while (i >= 0)
	427	{
	428	int l = m_indents[i];
	429	if (l > level)
	430	{
	431	if (m_listTypes[i] == 0)
	432	str << wxT("</ol>");
	433	else
	434	str << wxT("</ul>");
	435	m_indents.RemoveAt(i);
	436	m_listTypes.RemoveAt(i);
	437	}
	438	else
	439	break;
	440	i --;
	441	}
	442	}
	443
	444	/// Output font tag
	445	void wxRichTextHTMLHandler::OutputFont(const wxRichTextAttr& style, wxTextOutputStream& stream)
	446	{
	447	if (style.HasFont())
	448	{
	449	stream << wxString::Format(wxT("<font face=\"%s\" size=\"%ld\""), style.GetFontFaceName().c_str(), PtToSize(style.GetFontSize()));
	450	if (style.HasTextColour())
	451	stream << wxString::Format(wxT(" color=\"%s\""), style.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX).c_str());
	452	stream << wxT(" >");
	453	}
	454	}
	455
	456	int wxRichTextHTMLHandler::TypeOfList( const wxRichTextAttr& thisStyle, wxString& tag )
	457	{
	458	// We can use number attribute of li tag but not all the browsers support it.
	459	// also wxHtmlWindow doesn't support type attribute.
	460
	461	bool m_is_ul = false;
	462	if (thisStyle.GetBulletStyle() == (wxTEXT_ATTR_BULLET_STYLE_ARABIC\|wxTEXT_ATTR_BULLET_STYLE_PERIOD))
	463	tag = wxT("<ol type=\"1\">");
	464	else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_UPPER)
	465	tag = wxT("<ol type=\"A\">");
	466	else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_LOWER)
	467	tag = wxT("<ol type=\"a\">");
	468	else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_UPPER)
	469	tag = wxT("<ol type=\"I\">");
	470	else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_LOWER)
	471	tag = wxT("<ol type=\"i\">");
	472	else
	473	{
	474	tag = wxT("<ul>");
	475	m_is_ul = true;
	476	}
	477
	478	if (m_is_ul)
	479	return 1;
	480	else
	481	return 0;
	482	}
	483
	484	wxString wxRichTextHTMLHandler::GetAlignment( const wxRichTextAttr& thisStyle )
	485	{
	486	switch( thisStyle.GetAlignment() )
	487	{
	488	case wxTEXT_ALIGNMENT_LEFT:
	489	return wxT("left");
	490	case wxTEXT_ALIGNMENT_RIGHT:
	491	return wxT("right");
	492	case wxTEXT_ALIGNMENT_CENTER:
	493	return wxT("center");
	494	case wxTEXT_ALIGNMENT_JUSTIFIED:
	495	return wxT("justify");
	496	default:
	497	return wxT("left");
	498	}
	499	}
	500
	501	void wxRichTextHTMLHandler::WriteImage(wxRichTextImage* image, wxOutputStream& stream)
	502	{
	503	wxTextOutputStream str(stream);
	504
	505	str << wxT("<img src=\"");
	506
	507	#if wxUSE_FILESYSTEM
	508	if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
	509	{
	510	#if 0
	511	if (!image->GetImage().IsOk() && image->GetImageBlock().GetData())
	512	image->LoadFromBlock();
	513	if (image->GetImage().IsOk() && !image->GetImageBlock().GetData())
	514	image->MakeBlock();
	515	#endif
	516
	517	if (image->GetImageBlock().IsOk())
	518	{
	519	wxImage img;
	520	image->GetImageBlock().Load(img);
	521	if (img.IsOk())
	522	{
	523	wxString ext(image->GetImageBlock().GetExtension());
	524	wxString tempFilename(wxString::Format(wxT("image%d.%s"), sm_fileCounter, ext));
	525	wxMemoryFSHandler::AddFile(tempFilename, img, image->GetImageBlock().GetImageType());
	526
	527	m_imageLocations.Add(tempFilename);
	528
	529	str << wxT("memory:") << tempFilename;
	530	}
	531	}
	532	else
	533	str << wxT("memory:?");
	534
	535	sm_fileCounter ++;
	536	}
	537	else if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
	538	{
	539	#if 0
	540	if (!image->GetImage().IsOk() && image->GetImageBlock().GetData())
	541	image->LoadFromBlock();
	542	if (image->GetImage().IsOk() && !image->GetImageBlock().GetData())
	543	image->MakeBlock();
	544	#endif
	545
	546	if (image->GetImageBlock().IsOk())
	547	{
	548	wxString tempDir(GetTempDir());
	549	if (tempDir.IsEmpty())
	550	tempDir = wxFileName::GetTempDir();
	551
	552	wxString ext(image->GetImageBlock().GetExtension());
	553	wxString tempFilename(wxString::Format(wxT("%s/image%d.%s"), tempDir, sm_fileCounter, ext));
	554	image->GetImageBlock().Write(tempFilename);
	555
	556	m_imageLocations.Add(tempFilename);
	557
	558	str << wxFileSystem::FileNameToURL(tempFilename);
	559	}
	560	else
	561	str << wxT("file:?");
	562
	563	sm_fileCounter ++;
	564	}
	565	else // if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_BASE64) // this is implied
	566	#endif
	567	{
	568	str << wxT("data:");
	569	str << GetMimeType(image->GetImageBlock().GetImageType());
	570	str << wxT(";base64,");
	571	#if 0
	572	if (image->GetImage().IsOk() && !image->GetImageBlock().GetData())
	573	image->MakeBlock();
	574	#endif
	575	if (image->GetImageBlock().IsOk())
	576	{
	577	wxChar* data = b64enc( image->GetImageBlock().GetData(), image->GetImageBlock().GetDataSize() );
	578	str << data;
	579
	580	delete[] data;
	581	}
	582	}
	583
	584	str << wxT("\" />");
	585	}
	586
	587	long wxRichTextHTMLHandler::PtToSize(long size)
	588	{
	589	int i;
	590	int len = m_fontSizeMapping.GetCount();
	591	for (i = 0; i < len; i++)
	592	if (size <= m_fontSizeMapping[i])
	593	return i+1;
	594	return 7;
	595	}
	596
	597	wxString wxRichTextHTMLHandler::SymbolicIndent(long indent)
	598	{
	599	wxString in;
	600	for(;indent > 0; indent -= 20)
	601	in.Append( wxT(" ") );
	602	return in;
	603	}
	604
	605	const wxChar* wxRichTextHTMLHandler::GetMimeType(int imageType)
	606	{
	607	switch(imageType)
	608	{
	609	case wxBITMAP_TYPE_BMP:
	610	return wxT("image/bmp");
	611	case wxBITMAP_TYPE_TIFF:
	612	return wxT("image/tiff");
	613	case wxBITMAP_TYPE_GIF:
	614	return wxT("image/gif");
	615	case wxBITMAP_TYPE_PNG:
	616	return wxT("image/png");
	617	case wxBITMAP_TYPE_JPEG:
	618	return wxT("image/jpeg");
	619	default:
	620	return wxT("image/unknown");
	621	}
	622	}
	623
	624	// exim-style base64 encoder
	625	wxChar* wxRichTextHTMLHandler::b64enc( unsigned char* input, size_t in_len )
	626	{
	627	// elements of enc64 array must be 8 bit values
	628	// otherwise encoder will fail
	629	// hmmm.. Does wxT macro define a char as 16 bit value
	630	// when compiling with UNICODE option?
	631	static const wxChar enc64[] = wxT("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
	632	wxChar* output = new wxChar[4*((in_len+2)/3)+1];
	633	wxChar* p = output;
	634
	635	while( in_len-- > 0 )
	636	{
	637	register wxChar a, b;
	638
	639	a = *input++;
	640
	641	*p++ = enc64[ (a >> 2) & 0x3f ];
	642
	643	if( in_len-- == 0 )
	644	{
	645	*p++ = enc64[ (a << 4 ) & 0x30 ];
	646	*p++ = '=';
	647	*p++ = '=';
	648	break;
	649	}
	650
	651	b = *input++;
	652
	653	*p++ = enc64[(( a << 4 ) \| ((b >> 4) &0xf )) & 0x3f];
	654
	655	if( in_len-- == 0 )
	656	{
	657	*p++ = enc64[ (b << 2) & 0x3f ];
	658	*p++ = '=';
	659	break;
	660	}
	661
	662	a = *input++;
	663
	664	*p++ = enc64[ ((( b << 2 ) & 0x3f ) \| ((a >> 6)& 0x3)) & 0x3f ];
	665
	666	*p++ = enc64[ a & 0x3f ];
	667	}
	668	*p = 0;
	669
	670	return output;
	671	}
	672	#endif
	673	// wxUSE_STREAMS
	674
	675	/// Delete the in-memory or temporary files generated by the last operation
	676	bool wxRichTextHTMLHandler::DeleteTemporaryImages()
	677	{
	678	return DeleteTemporaryImages(GetFlags(), m_imageLocations);
	679	}
	680
	681	/// Delete the in-memory or temporary files generated by the last operation
	682	bool wxRichTextHTMLHandler::DeleteTemporaryImages(int flags, const wxArrayString& imageLocations)
	683	{
	684	size_t i;
	685	for (i = 0; i < imageLocations.GetCount(); i++)
	686	{
	687	wxString location = imageLocations[i];
	688
	689	if (flags & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
	690	{
	691	#if wxUSE_FILESYSTEM
	692	wxMemoryFSHandler::RemoveFile(location);
	693	#endif
	694	}
	695	else if (flags & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
	696	{
	697	if (wxFileExists(location))
	698	wxRemoveFile(location);
	699	}
	700	}
	701
	702	return true;
	703	}
	704
	705
	706	#endif
	707	// wxUSE_RICHTEXT
	708