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         wxTextAttr currentParaStyle = buffer->GetAttributes();
 105         wxTextAttr 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                 wxTextAttr 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                         wxTextAttr 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 wxTextAttr& currentStyle, const wxTextAttr& thisStyle, const wxTextAttr& 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     if (thisStyle.GetTextColour() != currentStyle.GetTextColour() )
 200     {
 201         wxString color(thisStyle.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX));
 202         style += wxString::Format(wxT(" color=\"%s\""), color.c_str());
 203     }
 204
 205     if (style.size())
 206     {
 207         str << wxString::Format(wxT("<font %s >"), style.c_str());
 208         m_font = true;
 209     }
 210
 211     if (thisStyle.GetFontWeight() == wxBOLD)
 212         str << wxT("<b>");
 213     if (thisStyle.GetFontStyle() == wxITALIC)
 214         str << wxT("<i>");
 215     if (thisStyle.GetFontUnderlined())
 216         str << wxT("<u>");
 217
 218     if (thisStyle.HasURL())
 219         str << wxT("<a href=\"") << thisStyle.GetURL() << wxT("\">");
 220 }
 221
 222 void wxRichTextHTMLHandler::EndCharacterFormatting(const wxTextAttr& WXUNUSED(currentStyle), const wxTextAttr& thisStyle, const wxTextAttr& WXUNUSED(paraStyle), wxTextOutputStream& stream)
 223 {
 224     if (thisStyle.HasURL())
 225         stream << wxT("</a>");
 226
 227     if (thisStyle.GetFontUnderlined())
 228         stream << wxT("</u>");
 229     if (thisStyle.GetFontStyle() == wxITALIC)
 230         stream << wxT("</i>");
 231     if (thisStyle.GetFontWeight() == wxBOLD)
 232         stream << wxT("</b>");
 233
 234     if (m_font)
 235     {
 236         m_font = false;
 237         stream << wxT("</font>");
 238     }
 239 }
 240
 241 /// Begin paragraph formatting
 242 void wxRichTextHTMLHandler::BeginParagraphFormatting(const wxTextAttr& WXUNUSED(currentStyle), const wxTextAttr& thisStyle, wxTextOutputStream& str)
 243 {
 244     if (thisStyle.HasPageBreak())
 245     {
 246         str << wxT("<div style=\"page-break-after:always\"></div>\n");
 247     }
 248
 249     if (thisStyle.HasLeftIndent() && thisStyle.GetLeftIndent() != 0)
 250     {
 251         if (thisStyle.HasBulletStyle())
 252         {
 253             int indent = thisStyle.GetLeftIndent();
 254
 255             // Close levels high than this
 256             CloseLists(indent, str);
 257
 258             if (m_indents.GetCount() > 0 && indent == m_indents.Last())
 259             {
 260                 // Same level, no need to start a new list
 261             }
 262             else if (m_indents.GetCount() == 0 || indent > m_indents.Last())
 263             {
 264                 m_indents.Add(indent);
 265
 266                 wxString tag;
 267                 int listType = TypeOfList(thisStyle, tag);
 268                 m_listTypes.Add(listType);
 269
 270                 // wxHTML needs an extra <p> before a list when using <p> ... </p> in previous paragraphs.
 271                 // TODO: pass a flag that indicates we're using wxHTML.
 272                 str << wxT("<p>\n");
 273
 274                 str << tag;
 275             }
 276
 277             str << wxT("<li> ");
 278         }
 279         else
 280         {
 281             CloseLists(-1, str);
 282
 283             wxString align = GetAlignment(thisStyle);
 284             str << wxString::Format(wxT("<p align=\"%s\""), align.c_str());
 285
 286             wxString styleStr;
 287
 288             if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingBefore())
 289             {
 290                 float spacingBeforeMM = thisStyle.GetParagraphSpacingBefore() / 10.0;
 291
 292                 styleStr += wxString::Format(wxT("margin-top: %.2fmm; "), spacingBeforeMM);
 293             }
 294             if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingAfter())
 295             {
 296                 float spacingAfterMM = thisStyle.GetParagraphSpacingAfter() / 10.0;
 297
 298                 styleStr += wxString::Format(wxT("margin-bottom: %.2fmm; "), spacingAfterMM);
 299             }
 300
 301             float indentLeftMM = (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent())/10.0;
 302             if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && (indentLeftMM > 0.0))
 303             {
 304                 styleStr += wxString::Format(wxT("margin-left: %.2fmm; "), indentLeftMM);
 305             }
 306             float indentRightMM = thisStyle.GetRightIndent()/10.0;
 307             if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasRightIndent() && (indentRightMM > 0.0))
 308             {
 309                 styleStr += wxString::Format(wxT("margin-right: %.2fmm; "), indentRightMM);
 310             }
 311             // First line indentation
 312             float firstLineIndentMM = - thisStyle.GetLeftSubIndent() / 10.0;
 313             if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && (firstLineIndentMM > 0.0))
 314             {
 315                 styleStr += wxString::Format(wxT("text-indent: %.2fmm; "), firstLineIndentMM);
 316             }
 317
 318             if (!styleStr.IsEmpty())
 319                 str << wxT(" style=\"") << styleStr << wxT("\"");
 320
 321             str << wxT(">");
 322
 323             // TODO: convert to pixels
 324             int indentPixels = static_cast<int>(indentLeftMM*10/4);
 325
 326             if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) == 0)
 327             {
 328                 // Use a table to do indenting if we don't have CSS
 329                 str << wxString::Format(wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td width=\"%d\"></td><td>"), indentPixels);
 330                 m_inTable = true;
 331             }
 332
 333             if (((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) == 0) && (thisStyle.GetLeftSubIndent() < 0))
 334             {
 335                 str << SymbolicIndent( - thisStyle.GetLeftSubIndent());
 336             }
 337         }
 338     }
 339     else
 340     {
 341         CloseLists(-1, str);
 342
 343         wxString align = GetAlignment(thisStyle);
 344         str << wxString::Format(wxT("<p align=\"%s\""), align.c_str());
 345
 346         wxString styleStr;
 347
 348         if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingBefore())
 349         {
 350             float spacingBeforeMM = thisStyle.GetParagraphSpacingBefore() / 10.0;
 351
 352             styleStr += wxString::Format(wxT("margin-top: %.2fmm; "), spacingBeforeMM);
 353         }
 354         if ((GetFlags() & wxRICHTEXT_HANDLER_USE_CSS) && thisStyle.HasParagraphSpacingAfter())
 355         {
 356             float spacingAfterMM = thisStyle.GetParagraphSpacingAfter() / 10.0;
 357
 358             styleStr += wxString::Format(wxT("margin-bottom: %.2fmm; "), spacingAfterMM);
 359         }
 360
 361         if (!styleStr.IsEmpty())
 362             str << wxT(" style=\"") << styleStr << wxT("\"");
 363
 364         str << wxT(">");
 365     }
 366     OutputFont(thisStyle, str);
 367 }
 368
 369 /// End paragraph formatting
 370 void wxRichTextHTMLHandler::EndParagraphFormatting(const wxTextAttr& WXUNUSED(currentStyle), const wxTextAttr& thisStyle, wxTextOutputStream& stream)
 371 {
 372     if (thisStyle.HasFont())
 373         stream << wxT("</font>");
 374
 375     if (m_inTable)
 376     {
 377         stream << wxT("</td></tr></table></p>\n");
 378         m_inTable = false;
 379     }
 380     else if (!thisStyle.HasBulletStyle())
 381         stream << wxT("</p>\n");
 382 }
 383
 384 /// Closes lists to level (-1 means close all)
 385 void wxRichTextHTMLHandler::CloseLists(int level, wxTextOutputStream& str)
 386 {
 387     // Close levels high than this
 388     int i = m_indents.GetCount()-1;
 389     while (i >= 0)
 390     {
 391         int l = m_indents[i];
 392         if (l > level)
 393         {
 394             if (m_listTypes[i] == 0)
 395                 str << wxT("</ol>");
 396             else
 397                 str << wxT("</ul>");
 398             m_indents.RemoveAt(i);
 399             m_listTypes.RemoveAt(i);
 400         }
 401         else
 402             break;
 403         i --;
 404      }
 405 }
 406
 407 /// Output font tag
 408 void wxRichTextHTMLHandler::OutputFont(const wxTextAttr& style, wxTextOutputStream& stream)
 409 {
 410     if (style.HasFont())
 411     {
 412         stream << wxString::Format(wxT("<font face=\"%s\" size=\"%ld\""), style.GetFontFaceName().c_str(), PtToSize(style.GetFontSize()));
 413         if (style.HasTextColour())
 414             stream << wxString::Format(wxT(" color=\"%s\""), style.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX).c_str());
 415         stream << wxT(" >");
 416     }
 417 }
 418
 419 int wxRichTextHTMLHandler::TypeOfList( const wxTextAttr& thisStyle, wxString& tag )
 420 {
 421     // We can use number attribute of li tag but not all the browsers support it.
 422     // also wxHtmlWindow doesn't support type attribute.
 423
 424     bool m_is_ul = false;
 425     if (thisStyle.GetBulletStyle() == (wxTEXT_ATTR_BULLET_STYLE_ARABIC|wxTEXT_ATTR_BULLET_STYLE_PERIOD))
 426         tag = wxT("<ol type=\"1\">");
 427     else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_UPPER)
 428         tag = wxT("<ol type=\"A\">");
 429     else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_LOWER)
 430         tag = wxT("<ol type=\"a\">");
 431     else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_UPPER)
 432         tag = wxT("<ol type=\"I\">");
 433     else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_LOWER)
 434         tag = wxT("<ol type=\"i\">");
 435     else
 436     {
 437         tag = wxT("<ul>");
 438         m_is_ul = true;
 439     }
 440
 441     if (m_is_ul)
 442         return 1;
 443     else
 444         return 0;
 445 }
 446
 447 wxString wxRichTextHTMLHandler::GetAlignment( const wxTextAttr& thisStyle )
 448 {
 449     switch( thisStyle.GetAlignment() )
 450     {
 451     case wxTEXT_ALIGNMENT_LEFT:
 452         return  wxT("left");
 453     case wxTEXT_ALIGNMENT_RIGHT:
 454         return wxT("right");
 455     case wxTEXT_ALIGNMENT_CENTER:
 456         return wxT("center");
 457     case wxTEXT_ALIGNMENT_JUSTIFIED:
 458         return wxT("justify");
 459     default:
 460         return wxT("left");
 461     }
 462 }
 463
 464 void wxRichTextHTMLHandler::WriteImage(wxRichTextImage* image, wxOutputStream& stream)
 465 {
 466     wxTextOutputStream str(stream);
 467
 468     str << wxT("<img src=\"");
 469
 470 #if wxUSE_FILESYSTEM
 471     if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
 472     {
 473         if (!image->GetImage().Ok() && image->GetImageBlock().GetData())
 474             image->LoadFromBlock();
 475         if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
 476             image->MakeBlock();
 477
 478         if (image->GetImage().Ok())
 479         {
 480             wxString ext(image->GetImageBlock().GetExtension());
 481             wxString tempFilename(wxString::Format(wxT("image%d.%s"), sm_fileCounter, ext));
 482             wxMemoryFSHandler::AddFile(tempFilename, image->GetImage(), image->GetImageBlock().GetImageType());
 483
 484             m_imageLocations.Add(tempFilename);
 485
 486             str << wxT("memory:") << tempFilename;
 487         }
 488         else
 489             str << wxT("memory:?");
 490
 491         sm_fileCounter ++;
 492     }
 493     else if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
 494     {
 495         if (!image->GetImage().Ok() && image->GetImageBlock().GetData())
 496             image->LoadFromBlock();
 497         if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
 498             image->MakeBlock();
 499
 500         if (image->GetImage().Ok())
 501         {
 502             wxString tempDir(GetTempDir());
 503             if (tempDir.IsEmpty())
 504                 tempDir = wxFileName::GetTempDir();
 505
 506             wxString ext(image->GetImageBlock().GetExtension());
 507             wxString tempFilename(wxString::Format(wxT("%s/image%d.%s"), tempDir, sm_fileCounter, ext));
 508             image->GetImageBlock().Write(tempFilename);
 509
 510             m_imageLocations.Add(tempFilename);
 511
 512             str << wxFileSystem::FileNameToURL(tempFilename);
 513         }
 514         else
 515             str << wxT("file:?");
 516
 517         sm_fileCounter ++;
 518     }
 519     else // if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_BASE64) // this is implied
 520 #endif
 521     {
 522         str << wxT("data:");
 523         str << GetMimeType(image->GetImageBlock().GetImageType());
 524         str << wxT(";base64,");
 525
 526         if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
 527             image->MakeBlock();
 528
 529         wxChar* data = b64enc( image->GetImageBlock().GetData(), image->GetImageBlock().GetDataSize() );
 530         str << data;
 531
 532         delete[] data;
 533     }
 534
 535     str << wxT("\" />");
 536 }
 537
 538 long wxRichTextHTMLHandler::PtToSize(long size)
 539 {
 540     int i;
 541     int len = m_fontSizeMapping.GetCount();
 542     for (i = 0; i < len; i++)
 543         if (size <= m_fontSizeMapping[i])
 544             return i+1;
 545     return 7;
 546 }
 547
 548 wxString wxRichTextHTMLHandler::SymbolicIndent(long indent)
 549 {
 550     wxString in;
 551     for(;indent > 0; indent -= 20)
 552         in.Append( wxT("&nbsp;") );
 553     return in;
 554 }
 555
 556 const wxChar* wxRichTextHTMLHandler::GetMimeType(int imageType)
 557 {
 558     switch(imageType)
 559     {
 560     case wxBITMAP_TYPE_BMP:
 561         return wxT("image/bmp");
 562     case wxBITMAP_TYPE_TIF:
 563         return wxT("image/tiff");
 564     case wxBITMAP_TYPE_GIF:
 565         return wxT("image/gif");
 566     case wxBITMAP_TYPE_PNG:
 567         return wxT("image/png");
 568     case wxBITMAP_TYPE_JPEG:
 569         return wxT("image/jpeg");
 570     default:
 571         return wxT("image/unknown");
 572     }
 573 }
 574
 575 // exim-style base64 encoder
 576 wxChar* wxRichTextHTMLHandler::b64enc( unsigned char* input, size_t in_len )
 577 {
 578     // elements of enc64 array must be 8 bit values
 579     // otherwise encoder will fail
 580     // hmmm.. Does wxT macro define a char as 16 bit value
 581     // when compiling with UNICODE option?
 582     static const wxChar enc64[] = wxT("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
 583     wxChar* output = new wxChar[4*((in_len+2)/3)+1];
 584     wxChar* p = output;
 585
 586     while( in_len-- > 0 )
 587     {
 588         register wxChar a, b;
 589
 590         a = *input++;
 591
 592         *p++ = enc64[ (a >> 2) & 0x3f ];
 593
 594         if( in_len-- == 0 )
 595         {
 596             *p++ = enc64[ (a << 4 ) & 0x30 ];
 597             *p++ = '=';
 598             *p++ = '=';
 599             break;
 600         }
 601
 602         b = *input++;
 603
 604         *p++ = enc64[(( a << 4 ) | ((b >> 4) &0xf )) & 0x3f];
 605
 606         if( in_len-- == 0 )
 607         {
 608             *p++ = enc64[ (b << 2) & 0x3f ];
 609             *p++ = '=';
 610             break;
 611         }
 612
 613         a = *input++;
 614
 615         *p++ = enc64[ ((( b << 2 ) & 0x3f ) | ((a >> 6)& 0x3)) & 0x3f ];
 616
 617         *p++ = enc64[ a & 0x3f ];
 618     }
 619     *p = 0;
 620
 621     return output;
 622 }
 623 #endif
 624 // wxUSE_STREAMS
 625
 626 /// Delete the in-memory or temporary files generated by the last operation
 627 bool wxRichTextHTMLHandler::DeleteTemporaryImages()
 628 {
 629     return DeleteTemporaryImages(GetFlags(), m_imageLocations);
 630 }
 631
 632 /// Delete the in-memory or temporary files generated by the last operation
 633 bool wxRichTextHTMLHandler::DeleteTemporaryImages(int flags, const wxArrayString& imageLocations)
 634 {
 635     size_t i;
 636     for (i = 0; i < imageLocations.GetCount(); i++)
 637     {
 638         wxString location = imageLocations[i];
 639
 640         if (flags & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
 641         {
 642 #if wxUSE_FILESYSTEM
 643             wxMemoryFSHandler::RemoveFile(location);
 644 #endif
 645         }
 646         else if (flags & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
 647         {
 648             if (wxFileExists(location))
 649                 wxRemoveFile(location);
 650         }
 651     }
 652
 653     return true;
 654 }
 655
 656
 657 #endif
 658 // wxUSE_RICHTEXT
 659