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();

    wxRichTextDrawingContext context(buffer);
    buffer->Defragment(context);

#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() == wxFONTWEIGHT_BOLD)
        str << wxT("<b>");
    if (thisStyle.GetFontStyle() == wxFONTSTYLE_ITALIC)
        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() == wxFONTSTYLE_ITALIC)
        stream << wxT("</i>");
    if (thisStyle.GetFontWeight() == wxFONTWEIGHT_BOLD)
        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.c_str()));
                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.c_str(), sm_fileCounter, ext.c_str()));
            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	wxRichTextDrawingContext context(buffer);
	79	buffer->Defragment(context);
	80
	81	#if wxUSE_UNICODE
	82	wxCSConv* customEncoding = NULL;
	83	wxMBConv* conv = NULL;
	84	if (!GetEncoding().IsEmpty())
	85	{
	86	customEncoding = new wxCSConv(GetEncoding());
	87	if (!customEncoding->IsOk())
	88	{
	89	wxDELETE(customEncoding);
	90	}
	91	}
	92	if (customEncoding)
	93	conv = customEncoding;
	94	else
	95	conv = & wxConvUTF8;
	96	#endif
	97
	98	{
	99	#if wxUSE_UNICODE
	100	wxTextOutputStream str(stream, wxEOL_NATIVE, *conv);
	101	#else
	102	wxTextOutputStream str(stream, wxEOL_NATIVE);
	103	#endif
	104
	105	wxRichTextAttr currentParaStyle = buffer->GetAttributes();
	106	wxRichTextAttr currentCharStyle = buffer->GetAttributes();
	107
	108	if ((GetFlags() & wxRICHTEXT_HANDLER_NO_HEADER_FOOTER) == 0)
	109	str << wxT("<html><head></head><body>\n");
	110
	111	OutputFont(currentParaStyle, str);
	112
	113	m_font = false;
	114	m_inTable = false;
	115
	116	m_indents.Clear();
	117	m_listTypes.Clear();
	118
	119	wxRichTextObjectList::compatibility_iterator node = buffer->GetChildren().GetFirst();
	120	while (node)
	121	{
	122	wxRichTextParagraph* para = wxDynamicCast(node->GetData(), wxRichTextParagraph);
	123	wxASSERT (para != NULL);
	124
	125	if (para)
	126	{
	127	wxRichTextAttr paraStyle(para->GetCombinedAttributes());
	128
	129	BeginParagraphFormatting(currentParaStyle, paraStyle, str);
	130
	131	wxRichTextObjectList::compatibility_iterator node2 = para->GetChildren().GetFirst();
	132	while (node2)
	133	{
	134	wxRichTextObject* obj = node2->GetData();
	135	wxRichTextPlainText* textObj = wxDynamicCast(obj, wxRichTextPlainText);
	136	if (textObj && !textObj->IsEmpty())
	137	{
	138	wxRichTextAttr charStyle(para->GetCombinedAttributes(obj->GetAttributes()));
	139	BeginCharacterFormatting(currentCharStyle, charStyle, paraStyle, str);
	140
	141	wxString text = textObj->GetText();
	142
	143	if (charStyle.HasTextEffects() && (charStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_CAPITALS))
	144	text.MakeUpper();
	145
	146	wxString toReplace = wxRichTextLineBreakChar;
	147	text.Replace(toReplace, wxT("<br>"));
	148
	149	str << text;
	150
	151	EndCharacterFormatting(currentCharStyle, charStyle, paraStyle, str);
	152	}
	153
	154	wxRichTextImage* image = wxDynamicCast(obj, wxRichTextImage);
	155	if( image && (!image->IsEmpty() \|\| image->GetImageBlock().GetData()))
	156	WriteImage( image, stream );
	157
	158	node2 = node2->GetNext();
	159	}
	160
	161	EndParagraphFormatting(currentParaStyle, paraStyle, str);
	162
	163	str << wxT("\n");
	164	}
	165	node = node->GetNext();
	166	}
	167
	168	CloseLists(-1, str);
	169
	170	str << wxT("</font>");
	171
	172	if ((GetFlags() & wxRICHTEXT_HANDLER_NO_HEADER_FOOTER) == 0)
	173	str << wxT("</body></html>");
	174
	175	str << wxT("\n");
	176	}
	177
	178	#if wxUSE_UNICODE
	179	if (customEncoding)
	180	delete customEncoding;
	181	#endif
	182
	183	m_buffer = NULL;
	184
	185	return true;
	186	}
	187
	188	void wxRichTextHTMLHandler::BeginCharacterFormatting(const wxRichTextAttr& currentStyle, const wxRichTextAttr& thisStyle, const wxRichTextAttr& WXUNUSED(paraStyle), wxTextOutputStream& str)
	189	{
	190	wxString style;
	191
	192	// Is there any change in the font properties of the item?
	193	if (thisStyle.GetFontFaceName() != currentStyle.GetFontFaceName())
	194	{
	195	wxString faceName(thisStyle.GetFontFaceName());
	196	style += wxString::Format(wxT(" face=\"%s\""), faceName.c_str());
	197	}
	198	if (thisStyle.GetFontSize() != currentStyle.GetFontSize())
	199	style += wxString::Format(wxT(" size=\"%ld\""), PtToSize(thisStyle.GetFontSize()));
	200
	201	bool bTextColourChanged = (thisStyle.GetTextColour() != currentStyle.GetTextColour());
	202	bool bBackgroundColourChanged = (thisStyle.GetBackgroundColour() != currentStyle.GetBackgroundColour());
	203	if (bTextColourChanged \|\| bBackgroundColourChanged)
	204	{
	205	style += wxT(" style=\"");
	206
	207	if (bTextColourChanged)
	208	{
	209	wxString color(thisStyle.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX));
	210	style += wxString::Format(wxT("color: %s"), color.c_str());
	211	}
	212	if (bTextColourChanged && bBackgroundColourChanged)
	213	style += wxT(";");
	214	if (bBackgroundColourChanged)
	215	{
	216	wxString color(thisStyle.GetBackgroundColour().GetAsString(wxC2S_HTML_SYNTAX));
	217	style += wxString::Format(wxT("background-color: %s"), color.c_str());
	218	}
	219
	220	style += wxT("\"");
	221	}
	222
	223	if (style.size())
	224	{
	225	str << wxString::Format(wxT("<font %s >"), style.c_str());
	226	m_font = true;
	227	}
	228
	229	if (thisStyle.GetFontWeight() == wxFONTWEIGHT_BOLD)
	230	str << wxT("<b>");
	231	if (thisStyle.GetFontStyle() == wxFONTSTYLE_ITALIC)
	232	str << wxT("<i>");
	233	if (thisStyle.GetFontUnderlined())
	234	str << wxT("<u>");
	235
	236	if (thisStyle.HasURL())
	237	str << wxT("<a href=\"") << thisStyle.GetURL() << wxT("\">");
	238
	239	if (thisStyle.HasTextEffects())
	240	{
	241	if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_STRIKETHROUGH)
	242	str << wxT("<del>");
	243	if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_SUPERSCRIPT)
	244	str << wxT("<sup>");
	245	if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_SUBSCRIPT)
	246	str << wxT("<sub>");
	247	}
	248	}
	249
	250	void wxRichTextHTMLHandler::EndCharacterFormatting(const wxRichTextAttr& WXUNUSED(currentStyle), const wxRichTextAttr& thisStyle, const wxRichTextAttr& WXUNUSED(paraStyle), wxTextOutputStream& stream)
	251	{
	252	if (thisStyle.HasURL())
	253	stream << wxT("</a>");
	254
	255	if (thisStyle.GetFontUnderlined())
	256	stream << wxT("</u>");
	257	if (thisStyle.GetFontStyle() == wxFONTSTYLE_ITALIC)
	258	stream << wxT("</i>");
	259	if (thisStyle.GetFontWeight() == wxFONTWEIGHT_BOLD)
	260	stream << wxT("</b>");
	261
	262	if (thisStyle.HasTextEffects())
	263	{
	264	if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_STRIKETHROUGH)
	265	stream << wxT("</del>");
	266	if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_SUPERSCRIPT)
	267	stream << wxT("</sup>");
	268	if (thisStyle.GetTextEffects() & wxTEXT_ATTR_EFFECT_SUBSCRIPT)
	269	stream << wxT("</sub>");
	270	}
	271
	272	if (m_font)
	273	{
	274	m_font = false;
	275	stream << wxT("</font>");
	276	}
	277	}
	278
	279	/// Begin paragraph formatting
	280	void wxRichTextHTMLHandler::BeginParagraphFormatting(const wxRichTextAttr& WXUNUSED(currentStyle), const wxRichTextAttr& thisStyle, wxTextOutputStream& str)
	281	{
	282	if (thisStyle.HasPageBreak())
	283	{
	284	str << wxT("<div style=\"page-break-after:always\"></div>\n");
	285	}
	286
	287	if (thisStyle.HasLeftIndent() && thisStyle.GetLeftIndent() != 0)
	288	{
	289	if (thisStyle.HasBulletStyle())
	290	{
	291	int indent = thisStyle.GetLeftIndent();
	292
	293	// Close levels high than this
	294	CloseLists(indent, str);
	295
	296	if (m_indents.GetCount() > 0 && indent == m_indents.Last())
	297	{
	298	// Same level, no need to start a new list
	299	}
	300	else if (m_indents.GetCount() == 0 \|\| indent > m_indents.Last())
	301	{
	302	m_indents.Add(indent);
	303
	304	wxString tag;
	305	int listType = TypeOfList(thisStyle, tag);
	306	m_listTypes.Add(listType);
	307
	308	// wxHTML needs an extra <p> before a list when using <p> ... </p> in previous paragraphs.
	309	// TODO: pass a flag that indicates we're using wxHTML.
	310	str << wxT("<p>\n");
	311
	312	str << tag;
	313	}
	314
	315	str << wxT("<li> ");
	316	}
	317	else
	318	{
	319	CloseLists(-1, str);
	320
	321	wxString align = GetAlignment(thisStyle);
	322	str << wxString::Format(wxT("<p align=\"%s\""), align.c_str());
	323
	324	wxString styleStr;
	325
	326	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingBefore())
	327	{
	328	float spacingBeforeMM = thisStyle.GetParagraphSpacingBefore() / 10.0;
	329
	330	styleStr += wxString::Format(wxT("margin-top: %.2fmm; "), spacingBeforeMM);
	331	}
	332	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingAfter())
	333	{
	334	float spacingAfterMM = thisStyle.GetParagraphSpacingAfter() / 10.0;
	335
	336	styleStr += wxString::Format(wxT("margin-bottom: %.2fmm; "), spacingAfterMM);
	337	}
	338
	339	float indentLeftMM = (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent())/10.0;
	340	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && (indentLeftMM > 0.0))
	341	{
	342	styleStr += wxString::Format(wxT("margin-left: %.2fmm; "), indentLeftMM);
	343	}
	344	float indentRightMM = thisStyle.GetRightIndent()/10.0;
	345	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasRightIndent() && (indentRightMM > 0.0))
	346	{
	347	styleStr += wxString::Format(wxT("margin-right: %.2fmm; "), indentRightMM);
	348	}
	349	// First line indentation
	350	float firstLineIndentMM = - thisStyle.GetLeftSubIndent() / 10.0;
	351	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && (firstLineIndentMM > 0.0))
	352	{
	353	styleStr += wxString::Format(wxT("text-indent: %.2fmm; "), firstLineIndentMM);
	354	}
	355
	356	if (!styleStr.IsEmpty())
	357	str << wxT(" style=\"") << styleStr << wxT("\"");
	358
	359	str << wxT(">");
	360
	361	// TODO: convert to pixels
	362	int indentPixels = static_cast<int>(indentLeftMM*10/4);
	363
	364	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) == 0)
	365	{
	366	// Use a table to do indenting if we don't have CSS
	367	str << wxString::Format(wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td width=\"%d\"></td><td>"), indentPixels);
	368	m_inTable = true;
	369	}
	370
	371	if (((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) == 0) && (thisStyle.GetLeftSubIndent() < 0))
	372	{
	373	str << SymbolicIndent( - thisStyle.GetLeftSubIndent());
	374	}
	375	}
	376	}
	377	else
	378	{
	379	CloseLists(-1, str);
	380
	381	wxString align = GetAlignment(thisStyle);
	382	str << wxString::Format(wxT("<p align=\"%s\""), align.c_str());
	383
	384	wxString styleStr;
	385
	386	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingBefore())
	387	{
	388	float spacingBeforeMM = thisStyle.GetParagraphSpacingBefore() / 10.0;
	389
	390	styleStr += wxString::Format(wxT("margin-top: %.2fmm; "), spacingBeforeMM);
	391	}
	392	if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingAfter())
	393	{
	394	float spacingAfterMM = thisStyle.GetParagraphSpacingAfter() / 10.0;
	395
	396	styleStr += wxString::Format(wxT("margin-bottom: %.2fmm; "), spacingAfterMM);
	397	}
	398
	399	if (!styleStr.IsEmpty())
	400	str << wxT(" style=\"") << styleStr << wxT("\"");
	401
	402	str << wxT(">");
	403	}
	404	OutputFont(thisStyle, str);
	405	}
	406
	407	/// End paragraph formatting
	408	void wxRichTextHTMLHandler::EndParagraphFormatting(const wxRichTextAttr& WXUNUSED(currentStyle), const wxRichTextAttr& thisStyle, wxTextOutputStream& stream)
	409	{
	410	if (thisStyle.HasFont())
	411	stream << wxT("</font>");
	412
	413	if (m_inTable)
	414	{
	415	stream << wxT("</td></tr></table></p>\n");
	416	m_inTable = false;
	417	}
	418	else if (!thisStyle.HasBulletStyle())
	419	stream << wxT("</p>\n");
	420	}
	421
	422	/// Closes lists to level (-1 means close all)
	423	void wxRichTextHTMLHandler::CloseLists(int level, wxTextOutputStream& str)
	424	{
	425	// Close levels high than this
	426	int i = m_indents.GetCount()-1;
	427	while (i >= 0)
	428	{
	429	int l = m_indents[i];
	430	if (l > level)
	431	{
	432	if (m_listTypes[i] == 0)
	433	str << wxT("</ol>");
	434	else
	435	str << wxT("</ul>");
	436	m_indents.RemoveAt(i);
	437	m_listTypes.RemoveAt(i);
	438	}
	439	else
	440	break;
	441	i --;
	442	}
	443	}
	444
	445	/// Output font tag
	446	void wxRichTextHTMLHandler::OutputFont(const wxRichTextAttr& style, wxTextOutputStream& stream)
	447	{
	448	if (style.HasFont())
	449	{
	450	stream << wxString::Format(wxT("<font face=\"%s\" size=\"%ld\""), style.GetFontFaceName().c_str(), PtToSize(style.GetFontSize()));
	451	if (style.HasTextColour())
	452	stream << wxString::Format(wxT(" color=\"%s\""), style.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX).c_str());
	453	stream << wxT(" >");
	454	}
	455	}
	456
	457	int wxRichTextHTMLHandler::TypeOfList( const wxRichTextAttr& thisStyle, wxString& tag )
	458	{
	459	// We can use number attribute of li tag but not all the browsers support it.
	460	// also wxHtmlWindow doesn't support type attribute.
	461
	462	bool m_is_ul = false;
	463	if (thisStyle.GetBulletStyle() == (wxTEXT_ATTR_BULLET_STYLE_ARABIC\|wxTEXT_ATTR_BULLET_STYLE_PERIOD))
	464	tag = wxT("<ol type=\"1\">");
	465	else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_UPPER)
	466	tag = wxT("<ol type=\"A\">");
	467	else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_LOWER)
	468	tag = wxT("<ol type=\"a\">");
	469	else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_UPPER)
	470	tag = wxT("<ol type=\"I\">");
	471	else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_LOWER)
	472	tag = wxT("<ol type=\"i\">");
	473	else
	474	{
	475	tag = wxT("<ul>");
	476	m_is_ul = true;
	477	}
	478
	479	if (m_is_ul)
	480	return 1;
	481	else
	482	return 0;
	483	}
	484
	485	wxString wxRichTextHTMLHandler::GetAlignment( const wxRichTextAttr& thisStyle )
	486	{
	487	switch( thisStyle.GetAlignment() )
	488	{
	489	case wxTEXT_ALIGNMENT_LEFT:
	490	return wxT("left");
	491	case wxTEXT_ALIGNMENT_RIGHT:
	492	return wxT("right");
	493	case wxTEXT_ALIGNMENT_CENTER:
	494	return wxT("center");
	495	case wxTEXT_ALIGNMENT_JUSTIFIED:
	496	return wxT("justify");
	497	default:
	498	return wxT("left");
	499	}
	500	}
	501
	502	void wxRichTextHTMLHandler::WriteImage(wxRichTextImage* image, wxOutputStream& stream)
	503	{
	504	wxTextOutputStream str(stream);
	505
	506	str << wxT("<img src=\"");
	507
	508	#if wxUSE_FILESYSTEM
	509	if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
	510	{
	511	#if 0
	512	if (!image->GetImage().IsOk() && image->GetImageBlock().GetData())
	513	image->LoadFromBlock();
	514	if (image->GetImage().IsOk() && !image->GetImageBlock().GetData())
	515	image->MakeBlock();
	516	#endif
	517
	518	if (image->GetImageBlock().IsOk())
	519	{
	520	wxImage img;
	521	image->GetImageBlock().Load(img);
	522	if (img.IsOk())
	523	{
	524	wxString ext(image->GetImageBlock().GetExtension());
	525	wxString tempFilename(wxString::Format(wxT("image%d.%s"), sm_fileCounter, ext.c_str()));
	526	wxMemoryFSHandler::AddFile(tempFilename, img, image->GetImageBlock().GetImageType());
	527
	528	m_imageLocations.Add(tempFilename);
	529
	530	str << wxT("memory:") << tempFilename;
	531	}
	532	}
	533	else
	534	str << wxT("memory:?");
	535
	536	sm_fileCounter ++;
	537	}
	538	else if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
	539	{
	540	#if 0
	541	if (!image->GetImage().IsOk() && image->GetImageBlock().GetData())
	542	image->LoadFromBlock();
	543	if (image->GetImage().IsOk() && !image->GetImageBlock().GetData())
	544	image->MakeBlock();
	545	#endif
	546
	547	if (image->GetImageBlock().IsOk())
	548	{
	549	wxString tempDir(GetTempDir());
	550	if (tempDir.IsEmpty())
	551	tempDir = wxFileName::GetTempDir();
	552
	553	wxString ext(image->GetImageBlock().GetExtension());
	554	wxString tempFilename(wxString::Format(wxT("%s/image%d.%s"), tempDir.c_str(), sm_fileCounter, ext.c_str()));
	555	image->GetImageBlock().Write(tempFilename);
	556
	557	m_imageLocations.Add(tempFilename);
	558
	559	str << wxFileSystem::FileNameToURL(tempFilename);
	560	}
	561	else
	562	str << wxT("file:?");
	563
	564	sm_fileCounter ++;
	565	}
	566	else // if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_BASE64) // this is implied
	567	#endif
	568	{
	569	str << wxT("data:");
	570	str << GetMimeType(image->GetImageBlock().GetImageType());
	571	str << wxT(";base64,");
	572	#if 0
	573	if (image->GetImage().IsOk() && !image->GetImageBlock().GetData())
	574	image->MakeBlock();
	575	#endif
	576	if (image->GetImageBlock().IsOk())
	577	{
	578	wxChar* data = b64enc( image->GetImageBlock().GetData(), image->GetImageBlock().GetDataSize() );
	579	str << data;
	580
	581	delete[] data;
	582	}
	583	}
	584
	585	str << wxT("\" />");
	586	}
	587
	588	long wxRichTextHTMLHandler::PtToSize(long size)
	589	{
	590	int i;
	591	int len = m_fontSizeMapping.GetCount();
	592	for (i = 0; i < len; i++)
	593	if (size <= m_fontSizeMapping[i])
	594	return i+1;
	595	return 7;
	596	}
	597
	598	wxString wxRichTextHTMLHandler::SymbolicIndent(long indent)
	599	{
	600	wxString in;
	601	for(;indent > 0; indent -= 20)
	602	in.Append( wxT(" ") );
	603	return in;
	604	}
	605
	606	const wxChar* wxRichTextHTMLHandler::GetMimeType(int imageType)
	607	{
	608	switch(imageType)
	609	{
	610	case wxBITMAP_TYPE_BMP:
	611	return wxT("image/bmp");
	612	case wxBITMAP_TYPE_TIFF:
	613	return wxT("image/tiff");
	614	case wxBITMAP_TYPE_GIF:
	615	return wxT("image/gif");
	616	case wxBITMAP_TYPE_PNG:
	617	return wxT("image/png");
	618	case wxBITMAP_TYPE_JPEG:
	619	return wxT("image/jpeg");
	620	default:
	621	return wxT("image/unknown");
	622	}
	623	}
	624
	625	// exim-style base64 encoder
	626	wxChar* wxRichTextHTMLHandler::b64enc( unsigned char* input, size_t in_len )
	627	{
	628	// elements of enc64 array must be 8 bit values
	629	// otherwise encoder will fail
	630	// hmmm.. Does wxT macro define a char as 16 bit value
	631	// when compiling with UNICODE option?
	632	static const wxChar enc64[] = wxT("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
	633	wxChar* output = new wxChar[4*((in_len+2)/3)+1];
	634	wxChar* p = output;
	635
	636	while( in_len-- > 0 )
	637	{
	638	register wxChar a, b;
	639
	640	a = *input++;
	641
	642	*p++ = enc64[ (a >> 2) & 0x3f ];
	643
	644	if( in_len-- == 0 )
	645	{
	646	*p++ = enc64[ (a << 4 ) & 0x30 ];
	647	*p++ = '=';
	648	*p++ = '=';
	649	break;
	650	}
	651
	652	b = *input++;
	653
	654	*p++ = enc64[(( a << 4 ) \| ((b >> 4) &0xf )) & 0x3f];
	655
	656	if( in_len-- == 0 )
	657	{
	658	*p++ = enc64[ (b << 2) & 0x3f ];
	659	*p++ = '=';
	660	break;
	661	}
	662
	663	a = *input++;
	664
	665	*p++ = enc64[ ((( b << 2 ) & 0x3f ) \| ((a >> 6)& 0x3)) & 0x3f ];
	666
	667	*p++ = enc64[ a & 0x3f ];
	668	}
	669	*p = 0;
	670
	671	return output;
	672	}
	673	#endif
	674	// wxUSE_STREAMS
	675
	676	/// Delete the in-memory or temporary files generated by the last operation
	677	bool wxRichTextHTMLHandler::DeleteTemporaryImages()
	678	{
	679	return DeleteTemporaryImages(GetFlags(), m_imageLocations);
	680	}
	681
	682	/// Delete the in-memory or temporary files generated by the last operation
	683	bool wxRichTextHTMLHandler::DeleteTemporaryImages(int flags, const wxArrayString& imageLocations)
	684	{
	685	size_t i;
	686	for (i = 0; i < imageLocations.GetCount(); i++)
	687	{
	688	wxString location = imageLocations[i];
	689
	690	if (flags & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
	691	{
	692	#if wxUSE_FILESYSTEM
	693	wxMemoryFSHandler::RemoveFile(location);
	694	#endif
	695	}
	696	else if (flags & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
	697	{
	698	if (wxFileExists(location))
	699	wxRemoveFile(location);
	700	}
	701	}
	702
	703	return true;
	704	}
	705
	706
	707	#endif
	708	// wxUSE_RICHTEXT
	709