src/richtext/richtexthtml.cpp

   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("&nbsp;") );
 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