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
  23 #ifndef WX_PRECOMP
  24 #endif
  25
  26 #include "wx/filename.h"
  27 #include "wx/wfstream.h"
  28 #include "wx/txtstrm.h"
  29
  30 #if wxUSE_FILESYSTEM
  31 #include "wx/filesys.h"
  32 #include "wx/fs_mem.h"
  33 #endif
  34
  35 IMPLEMENT_DYNAMIC_CLASS(wxRichTextHTMLHandler, wxRichTextFileHandler)
  36
  37 int wxRichTextHTMLHandler::sm_fileCounter = 1;
  38
  39 /// Can we handle this filename (if using files)? By default, checks the extension.
  40 bool wxRichTextHTMLHandler::CanHandle(const wxString& filename) const
  41 {
  42     wxString path, file, ext;
  43     wxSplitPath(filename, & path, & file, & ext);
  44
  45     return (ext.Lower() == wxT("html") || ext.Lower() == wxT("htm"));
  46 }
  47
  48
  49 #if wxUSE_STREAMS
  50 bool wxRichTextHTMLHandler::DoLoadFile(wxRichTextBuffer *WXUNUSED(buffer), wxInputStream& WXUNUSED(stream))
  51 {
  52     return false;
  53 }
  54
  55 /*
  56  * We need to output only _changes_ in character formatting.
  57  */
  58
  59 bool wxRichTextHTMLHandler::DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream& stream)
  60 {
  61     ClearTemporaryImageLocations();
  62
  63     buffer->Defragment();
  64
  65     wxTextOutputStream str(stream);
  66
  67     wxTextAttrEx currentParaStyle = buffer->GetAttributes();
  68     wxTextAttrEx currentCharStyle = buffer->GetAttributes();
  69
  70     str << wxT("<html><head></head><body>\n");
  71
  72     str << wxT("<table border=0 cellpadding=0 cellspacing=0><tr><td width=\"100%\">");
  73
  74     str << wxString::Format(wxT("<font face=\"%s\" size=\"%ld\" color=\"%s\" >"),
  75         currentParaStyle.GetFont().GetFaceName().c_str(), PtToSize(currentParaStyle.GetFont().GetPointSize()),
  76         currentParaStyle.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX).c_str());
  77
  78     m_font = false;
  79     m_indent = 0;
  80     m_list = false;
  81
  82     wxRichTextObjectList::compatibility_iterator node = buffer->GetChildren().GetFirst();
  83     while (node)
  84     {
  85         wxRichTextParagraph* para = wxDynamicCast(node->GetData(), wxRichTextParagraph);
  86         wxASSERT (para != NULL);
  87
  88         if (para)
  89         {
  90             wxTextAttrEx paraStyle(para->GetCombinedAttributes());
  91
  92             OutputParagraphFormatting(currentParaStyle, paraStyle, stream);
  93
  94             wxRichTextObjectList::compatibility_iterator node2 = para->GetChildren().GetFirst();
  95             while (node2)
  96             {
  97                 wxRichTextObject* obj = node2->GetData();
  98                 wxRichTextPlainText* textObj = wxDynamicCast(obj, wxRichTextPlainText);
  99                 if (textObj && !textObj->IsEmpty())
 100                 {
 101                     wxTextAttrEx charStyle(para->GetCombinedAttributes(obj->GetAttributes()));
 102                     BeginCharacterFormatting(currentCharStyle, charStyle, paraStyle, stream);
 103
 104                     str << textObj->GetText();
 105
 106                     EndCharacterFormatting(currentCharStyle, charStyle, paraStyle, stream);
 107                 }
 108
 109                 wxRichTextImage* image = wxDynamicCast(obj, wxRichTextImage);
 110                 if( image && !image->IsEmpty())
 111                     WriteImage( image, stream );
 112
 113                 node2 = node2->GetNext();
 114             }
 115             str << wxT("\n");
 116         }
 117         node = node->GetNext();
 118     }
 119
 120     str << wxT("</font></td></tr></table></body></html>\n");
 121
 122     return true;
 123 }
 124
 125 void wxRichTextHTMLHandler::BeginCharacterFormatting(const wxTextAttrEx& currentStyle, const wxTextAttrEx& thisStyle, const wxTextAttrEx& paraStyle, wxOutputStream& stream)
 126 {
 127     wxTextOutputStream str(stream);
 128
 129     // Is the item a bulleted one?
 130     if ( paraStyle.GetBulletStyle() != wxTEXT_ATTR_BULLET_STYLE_NONE )
 131     {
 132         // Is there any opened list?
 133         if (m_list)
 134         {
 135             // Yes there is
 136
 137             // Is the item among the previous ones?
 138             // Is the item one of the previous list tag's child items?
 139             if ((paraStyle.GetLeftIndent() == (m_indent + 100)) || (paraStyle.GetLeftIndent() < 100))
 140                 str << wxT("<li>"); //Yes it is
 141             else
 142             {
 143                 // No it isn't, so we should close the list tag
 144                 str << (m_is_ul ? wxT("</ul>") : wxT("</ol>"));
 145
 146                 // And renavigate to new list's horizontal position
 147                 NavigateToListPosition(paraStyle, str);
 148
 149                 // Get the appropriate tag, an ol for numerical values, an ul for dot, square etc.
 150                 wxString tag;
 151                 TypeOfList(paraStyle, tag);
 152                 str << tag << wxT("<li>");
 153             }
 154         }
 155         else
 156         {
 157             // No there isn't a list.
 158             // navigate to new list's horizontal position(indent)
 159             NavigateToListPosition(paraStyle, str);
 160
 161             // Get the appropriate tag, an ol for numerical values, an ul for dot, square etc.
 162             wxString tag;
 163             TypeOfList(paraStyle, tag);
 164             str << tag << wxT("<li>");
 165
 166             // Now we have a list, mark it.
 167             m_list = true;
 168         }
 169     }
 170     else if( m_list )
 171     {
 172         // The item is not bulleted and there is a list what should be closed now.
 173         // So close the list
 174
 175         str << (m_is_ul ? wxT("</ul>") : wxT("</ol>"));
 176
 177         // And mark as there is no an opened list
 178         m_list = false;
 179     }
 180
 181     // does the item have an indentation ?
 182     if( paraStyle.GetLeftIndent() )
 183     {
 184         if (paraStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_NONE)
 185         {
 186             if (m_indent)
 187             {
 188                 if ((paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent()) == m_indent)
 189                 {
 190                     if (paraStyle.GetLeftSubIndent() < 0)
 191                     {
 192                         str << SymbolicIndent(~paraStyle.GetLeftSubIndent());
 193                     }
 194                 }
 195                 else
 196                 {
 197                     if (paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent() > m_indent)
 198                     {
 199                         Indent(paraStyle, str);
 200                         m_indent = paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent();
 201                         m_indents.Add( m_indent );
 202                     }
 203                     else
 204                     {
 205                         int i = m_indents.size() - 1;
 206                         for (; i > -1; i--)
 207                         {
 208                             if (m_indent < (paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent()))
 209                             {
 210                                 Indent(paraStyle, str);
 211                                 m_indent = paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent();
 212                                 m_indents.Add( m_indent );
 213
 214                                 break;
 215                             }
 216                             else if (m_indent == (paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent()))
 217                             {
 218                                 if (paraStyle.GetLeftSubIndent() < 0)
 219                                 {
 220                                     str << SymbolicIndent(~paraStyle.GetLeftSubIndent());
 221                                 }
 222                                 break;
 223                             }
 224                             else
 225                             {
 226                                 str << wxT("</td></tr></table>");
 227
 228                                 m_indents.RemoveAt(i);
 229
 230                                 if(i < 1)
 231                                 {
 232                                     m_indent=0; break;
 233                                 }
 234                                 m_indent = m_indents[i-1];
 235                             }
 236                         }
 237                     }
 238                 }
 239             }
 240             else
 241             {
 242                 Indent(paraStyle, str);
 243                 m_indent = paraStyle.GetLeftIndent() + paraStyle.GetLeftSubIndent();
 244                 m_indents.Add( m_indent );
 245             }
 246         }
 247     }
 248     else if (m_indent)
 249     {
 250         // The item is not indented and there is a table(s) that should be closed now.
 251
 252         for (unsigned int i = 0; i < m_indents.size(); i++)
 253             str << wxT("</td></tr></table>");
 254
 255         m_indent = 0;
 256         m_indents.Clear();
 257     }
 258
 259
 260     wxString style;
 261
 262     // Is there any change in the font properties of the item?
 263     if (thisStyle.GetFont().GetFaceName() != currentStyle.GetFont().GetFaceName())
 264     {
 265         wxString faceName(thisStyle.GetFont().GetFaceName());
 266         style += wxString::Format(wxT(" face=\"%s\""), faceName.c_str());
 267     }
 268     if (thisStyle.GetFont().GetPointSize() != currentStyle.GetFont().GetPointSize())
 269         style += wxString::Format(wxT(" size=\"%ld\""), PtToSize(thisStyle.GetFont().GetPointSize()));
 270     if (thisStyle.GetTextColour() != currentStyle.GetTextColour() )
 271     {
 272         wxString color(thisStyle.GetTextColour().GetAsString(wxC2S_HTML_SYNTAX));
 273         style += wxString::Format(wxT(" color=\"%s\""), color.c_str());
 274     }
 275
 276     if (style.size())
 277     {
 278         str << wxString::Format(wxT("<font %s >"), style.c_str());
 279         m_font = true;
 280     }
 281
 282     if (thisStyle.GetFont().GetWeight() == wxBOLD)
 283         str << wxT("<b>");
 284     if (thisStyle.GetFont().GetStyle() == wxITALIC)
 285         str << wxT("<i>");
 286     if (thisStyle.GetFont().GetUnderlined())
 287         str << wxT("<u>");
 288
 289     if (thisStyle.HasURL())
 290         str << wxT("<a href=\"") << thisStyle.GetURL() << wxT("\">");
 291 }
 292
 293 void wxRichTextHTMLHandler::EndCharacterFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, const wxTextAttrEx& WXUNUSED(paraStyle), wxOutputStream& stream)
 294 {
 295     wxTextOutputStream str(stream);
 296
 297     if (thisStyle.HasURL())
 298         str << wxT("</a>");
 299
 300     if (thisStyle.GetFont().GetUnderlined())
 301         str << wxT("</u>");
 302     if (thisStyle.GetFont().GetStyle() == wxITALIC)
 303         str << wxT("</i>");
 304     if (thisStyle.GetFont().GetWeight() == wxBOLD)
 305         str << wxT("</b>");
 306
 307     if (m_font)
 308     {
 309         m_font = false;
 310         str << wxT("</font>");
 311     }
 312 }
 313
 314 /// Output paragraph formatting
 315 void wxRichTextHTMLHandler::OutputParagraphFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxOutputStream& stream)
 316 {
 317     // If there is no opened list currently, insert a <p> after every paragraph
 318     if (!m_list)
 319     {
 320         wxTextOutputStream str(stream);
 321         wxString align = GetAlignment(thisStyle);
 322         str << wxString::Format(wxT("<p align=\"%s\">"), align.c_str());
 323     }
 324 }
 325
 326 void wxRichTextHTMLHandler::NavigateToListPosition(const wxTextAttrEx& thisStyle, wxTextOutputStream& str)
 327 {
 328     // indenting an item using an ul/ol tag is equal to inserting 5 x &nbsp; on its left side.
 329     // so we should start from 100 point left
 330
 331     // Is the second td's left wall of the current indentaion table at the 100+ point-left-side
 332     // of the item, horizontally?
 333     if (m_indent + 100 < thisStyle.GetLeftIndent())
 334     {
 335         // yes it is
 336         LIndent(thisStyle, str);
 337         m_indent = thisStyle.GetLeftIndent() - 100;
 338         m_indents.Add( m_indent );
 339         return;
 340     }
 341     // No it isn't
 342
 343     int i = m_indents.size() - 1;
 344     for (; i > -1; i--)
 345     {
 346         //Is the second td's left wall of the current indentaion table at the 100+ point-left-side
 347         //of the item ?
 348         if (m_indent + 100 < thisStyle.GetLeftIndent())
 349         {
 350             // Yes it is
 351             LIndent(thisStyle, str);
 352             m_indent = thisStyle.GetLeftIndent() - 100;
 353             m_indents.Add( m_indent );
 354             break;
 355         }
 356         else if (m_indent + 100 == thisStyle.GetLeftIndent())
 357             break; //exact match
 358         else
 359         {
 360             // No it is not, the second td's left wall of the current indentaion table is at the
 361             //right side of the current item horizontally, so close it.
 362             str << wxT("</td></tr></table>");
 363
 364             m_indents.RemoveAt(i);
 365
 366             if (i < 1)
 367             {
 368                 m_indent=0; break;
 369             }
 370             m_indent = m_indents[i-1];
 371         }
 372     }
 373 }
 374 void wxRichTextHTMLHandler::Indent( const wxTextAttrEx& thisStyle, wxTextOutputStream& str )
 375 {
 376     //There is no way to indent an item in HTML, but we can use tables.
 377
 378     // Item -> "Hello world"
 379     // Its Left Indentation -> 100
 380     // Its Left Sub-Indentation ->40
 381     // A typical indentation-table for the item will be construct as the following
 382
 383     // 3 x nbsp = 60
 384     // 2 x nbsp = 40
 385     // LSI = Left Sub Indent
 386     // LI = Left Indent - LSI
 387     //
 388     // -------------------------------------------
 389     // |&nbsp;&nbsp;nbsp;|nbsp;nbsp;Hello World  |
 390     // |      |          |    |                  |
 391     // |        V        |    V                  |
 392     // |      --LI--     | --LSI--               |
 393     // -------------------------------------------
 394
 395     str << wxT("<table width=\"100%\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr>");
 396
 397     wxString symbolic_indent = SymbolicIndent( (thisStyle.GetLeftIndent() + thisStyle.GetLeftSubIndent()) - m_indent );
 398     str << wxString::Format( wxT("<td>%s</td>"), symbolic_indent.c_str() );
 399     str << wxT("<td width=\"100%\">");
 400
 401     if (thisStyle.GetLeftSubIndent() < 0)
 402     {
 403         str << SymbolicIndent(~thisStyle.GetLeftSubIndent());
 404     }
 405 }
 406
 407 void wxRichTextHTMLHandler::LIndent( const wxTextAttrEx& thisStyle, wxTextOutputStream& str )
 408 {
 409     // Code:
 410     // r.BeginNumberedBullet(1, 200, 60);
 411     // r.Newline();
 412     // r.WriteText(wxT("first item"));
 413     // r.EndNumberedBullet();
 414     // r.BeginNumberedBullet(2, 200, 60);
 415     // r.Newline();
 416     // r.WriteText(wxT("second item."));
 417     // r.EndNumberedBullet();
 418     //
 419     // A typical indentation-table for the item will be construct as the following
 420
 421     // 1 x nbsp = 20 point
 422     // ULI -> 100pt (UL/OL tag indents its sub element by 100 point)
 423     // <--------- 100 pt ---------->|
 424     // ------------------------------------------------------
 425     // |&nbsp;&nbsp;nbsp;&nbsp;nbsp;|<ul>                   |
 426     // |                            |<-ULI-><li>first item  |
 427     // |                            |<-ULI-><li>second item |
 428     // |                            |</ul>                  |
 429     // ------------------------------------------------------
 430     //                              |<-100->|
 431
 432
 433     str << wxT("<table width=\"100%\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tr>");
 434
 435     wxString symbolic_indent = SymbolicIndent( (thisStyle.GetLeftIndent() - m_indent) - 100);
 436     str << wxString::Format( wxT("<td>%s</td>"), symbolic_indent.c_str() );
 437     str << wxT("<td width=\"100%\">");
 438 }
 439
 440 void wxRichTextHTMLHandler::TypeOfList( const wxTextAttrEx& thisStyle, wxString& tag )
 441 {
 442     // We can use number attribute of li tag but not all the browsers support it.
 443     // also wxHtmlWindow doesn't support type attribute.
 444
 445     m_is_ul = false;
 446     if (thisStyle.GetBulletStyle() == (wxTEXT_ATTR_BULLET_STYLE_ARABIC|wxTEXT_ATTR_BULLET_STYLE_PERIOD))
 447         tag = wxT("<ol type=\"1\">");
 448     else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_UPPER)
 449         tag = wxT("<ol type=\"A\">");
 450     else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_LETTERS_LOWER)
 451         tag = wxT("<ol type=\"a\">");
 452     else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_UPPER)
 453         tag = wxT("<ol type=\"I\">");
 454     else if (thisStyle.GetBulletStyle() == wxTEXT_ATTR_BULLET_STYLE_ROMAN_LOWER)
 455         tag = wxT("<ol type=\"i\">");
 456     else
 457     {
 458         tag = wxT("<ul>");
 459         m_is_ul = true;
 460     }
 461 }
 462
 463 wxString wxRichTextHTMLHandler::GetAlignment( const wxTextAttrEx& thisStyle )
 464 {
 465     switch( thisStyle.GetAlignment() )
 466     {
 467     case wxTEXT_ALIGNMENT_LEFT:
 468         return  wxT("left");
 469     case wxTEXT_ALIGNMENT_RIGHT:
 470         return wxT("right");
 471     case wxTEXT_ALIGNMENT_CENTER:
 472         return wxT("center");
 473     case wxTEXT_ALIGNMENT_JUSTIFIED:
 474         return wxT("justify");
 475     default:
 476         return wxT("left");
 477     }
 478 }
 479
 480 void wxRichTextHTMLHandler::WriteImage(wxRichTextImage* image, wxOutputStream& stream)
 481 {
 482     wxTextOutputStream str(stream);
 483
 484     str << wxT("<img src=\"");
 485
 486 #if wxUSE_FILESYSTEM
 487     if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
 488     {
 489         if (!image->GetImage().Ok() && image->GetImageBlock().GetData())
 490             image->LoadFromBlock();
 491         if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
 492             image->MakeBlock();
 493
 494         if (image->GetImage().Ok())
 495         {
 496             wxString ext(image->GetImageBlock().GetExtension());
 497             wxString tempFilename(wxString::Format(wxT("image%d.%s"), sm_fileCounter, (const wxChar*) ext));
 498             wxMemoryFSHandler::AddFile(tempFilename, image->GetImage(), image->GetImageBlock().GetImageType());
 499
 500             m_imageLocations.Add(tempFilename);
 501
 502             str << wxT("memory:") << tempFilename;
 503         }
 504         else
 505             str << wxT("memory:?");
 506
 507         sm_fileCounter ++;
 508     }
 509     else if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
 510     {
 511         if (!image->GetImage().Ok() && image->GetImageBlock().GetData())
 512             image->LoadFromBlock();
 513         if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
 514             image->MakeBlock();
 515
 516         if (image->GetImage().Ok())
 517         {
 518             wxString tempDir(GetTempDir());
 519             if (tempDir.IsEmpty())
 520                 tempDir = wxFileName::GetTempDir();
 521
 522             wxString ext(image->GetImageBlock().GetExtension());
 523             wxString tempFilename(wxString::Format(wxT("%s/image%d.%s"), tempDir, sm_fileCounter, (const wxChar*) ext));
 524             image->GetImageBlock().Write(tempFilename);
 525
 526             m_imageLocations.Add(tempFilename);
 527
 528             str << wxFileSystem::FileNameToURL(tempFilename);
 529         }
 530         else
 531             str << wxT("file:?");
 532
 533         sm_fileCounter ++;
 534     }
 535     else // if (GetFlags() & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_BASE64) // this is implied
 536 #endif
 537     {
 538         str << wxT("data:");
 539         str << GetMimeType(image->GetImageBlock().GetImageType());
 540         str << wxT(";base64,");
 541
 542         if (image->GetImage().Ok() && !image->GetImageBlock().GetData())
 543             image->MakeBlock();
 544
 545         wxChar* data = b64enc( image->GetImageBlock().GetData(), image->GetImageBlock().GetDataSize() );
 546         str << data;
 547
 548         delete[] data;
 549     }
 550
 551     str << wxT("\" />");
 552 }
 553
 554 long wxRichTextHTMLHandler::PtToSize(long size)
 555 {
 556     // return approximate size
 557     if (size < 9 ) return 1;
 558     else if( size < 11 ) return 2;
 559     else if( size < 14 ) return 3;
 560     else if( size < 18 ) return 4;
 561     else if( size < 23 ) return 5;
 562     else if( size < 30 ) return 6;
 563     else return 7;
 564 }
 565
 566 wxString wxRichTextHTMLHandler::SymbolicIndent(long indent)
 567 {
 568     wxString in;
 569     for(;indent > 0; indent -= 20)
 570         in.Append( wxT("&nbsp;") );
 571     return in;
 572 }
 573
 574 const wxChar* wxRichTextHTMLHandler::GetMimeType(int imageType)
 575 {
 576     switch(imageType)
 577     {
 578     case wxBITMAP_TYPE_BMP:
 579         return wxT("image/bmp");
 580     case wxBITMAP_TYPE_TIF:
 581         return wxT("image/tiff");
 582     case wxBITMAP_TYPE_GIF:
 583         return wxT("image/gif");
 584     case wxBITMAP_TYPE_PNG:
 585         return wxT("image/png");
 586     case wxBITMAP_TYPE_JPEG:
 587         return wxT("image/jpeg");
 588     default:
 589         return wxT("image/unknown");
 590     }
 591 }
 592
 593 // exim-style base64 encoder
 594 wxChar* wxRichTextHTMLHandler::b64enc( unsigned char* input, size_t in_len )
 595 {
 596     // elements of enc64 array must be 8 bit values
 597     // otherwise encoder will fail
 598     // hmmm.. Does wxT macro define a char as 16 bit value
 599     // when compiling with UNICODE option?
 600     static const wxChar enc64[] = wxT("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
 601     wxChar* output = new wxChar[4*((in_len+2)/3)+1];
 602     wxChar* p = output;
 603
 604     while( in_len-- > 0 )
 605     {
 606         register wxChar a, b;
 607
 608         a = *input++;
 609
 610         *p++ = enc64[ (a >> 2) & 0x3f ];
 611
 612         if( in_len-- == 0 )
 613         {
 614             *p++ = enc64[ (a << 4 ) & 0x30 ];
 615             *p++ = '=';
 616             *p++ = '=';
 617             break;
 618         }
 619
 620         b = *input++;
 621
 622         *p++ = enc64[(( a << 4 ) | ((b >> 4) &0xf )) & 0x3f];
 623
 624         if( in_len-- == 0 )
 625         {
 626             *p++ = enc64[ (b << 2) & 0x3f ];
 627             *p++ = '=';
 628             break;
 629         }
 630
 631         a = *input++;
 632
 633         *p++ = enc64[ ((( b << 2 ) & 0x3f ) | ((a >> 6)& 0x3)) & 0x3f ];
 634
 635         *p++ = enc64[ a & 0x3f ];
 636     }
 637     *p = 0;
 638
 639     return output;
 640 }
 641 #endif
 642 // wxUSE_STREAMS
 643
 644 /// Delete the in-memory or temporary files generated by the last operation
 645 bool wxRichTextHTMLHandler::DeleteTemporaryImages()
 646 {
 647     return DeleteTemporaryImages(GetFlags(), m_imageLocations);
 648 }
 649
 650 /// Delete the in-memory or temporary files generated by the last operation
 651 bool wxRichTextHTMLHandler::DeleteTemporaryImages(int flags, const wxArrayString& imageLocations)
 652 {
 653     size_t i;
 654     for (i = 0; i < imageLocations.GetCount(); i++)
 655     {
 656         wxString location = imageLocations[i];
 657
 658         if (flags & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY)
 659         {
 660 #if wxUSE_FILESYSTEM
 661             wxMemoryFSHandler::RemoveFile(location);
 662 #endif
 663         }
 664         else if (flags & wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES)
 665         {
 666             if (wxFileExists(location))
 667                 wxRemoveFile(location);
 668         }
 669     }
 670
 671     return true;
 672 }
 673
 674
 675 #endif
 676 // wxUSE_RICHTEXT
 677