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     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("&nbsp;") );
 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