src/html/winpars.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        winpars.cpp
   3 // Purpose:     wxHtmlParser class (generic parser)
   4 // Author:      Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1999 Vaclav Slavik
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #include "wx/wxprec.h"
  11
  12 #include "wx/defs.h"
  13 #if wxUSE_HTML && wxUSE_STREAMS
  14
  15 #ifdef __BORLANDC__
  16 #pragma hdrstop
  17 #endif
  18
  19 #ifndef WXPRECOMP
  20     #include "wx/intl.h"
  21     #include "wx/dc.h"
  22 #endif
  23
  24 #include "wx/html/htmldefs.h"
  25 #include "wx/html/winpars.h"
  26 #include "wx/html/htmlwin.h"
  27 #include "wx/fontmap.h"
  28 #include "wx/log.h"
  29 #include "wx/settings.h"
  30 #include "wx/uri.h"
  31
  32
  33 //-----------------------------------------------------------------------------
  34 // wxHtmlWinParser
  35 //-----------------------------------------------------------------------------
  36
  37 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinParser, wxHtmlParser)
  38
  39 wxList wxHtmlWinParser::m_Modules;
  40
  41 wxHtmlWinParser::wxHtmlWinParser(wxHtmlWindow *wnd) : wxHtmlParser()
  42 {
  43     m_tmpStrBuf = NULL;
  44     m_tmpStrBufSize = 0;
  45     m_Window = wnd;
  46     m_Container = NULL;
  47     m_DC = NULL;
  48     m_CharHeight = m_CharWidth = 0;
  49     m_UseLink = false;
  50 #if !wxUSE_UNICODE
  51     m_EncConv = NULL;
  52     m_InputEnc = wxFONTENCODING_ISO8859_1;
  53     m_OutputEnc = wxFONTENCODING_DEFAULT;
  54 #endif
  55     m_lastWordCell = NULL;
  56
  57     {
  58         int i, j, k, l, m;
  59         for (i = 0; i < 2; i++)
  60             for (j = 0; j < 2; j++)
  61                 for (k = 0; k < 2; k++)
  62                     for (l = 0; l < 2; l++)
  63                         for (m = 0; m < 7; m++)
  64                         {
  65                             m_FontsTable[i][j][k][l][m] = NULL;
  66                             m_FontsFacesTable[i][j][k][l][m] = wxEmptyString;
  67 #if !wxUSE_UNICODE
  68                             m_FontsEncTable[i][j][k][l][m] = wxFONTENCODING_DEFAULT;
  69 #endif
  70                         }
  71
  72         SetFonts(wxEmptyString, wxEmptyString, NULL);
  73     }
  74
  75     // fill in wxHtmlParser's tables:
  76     wxList::compatibility_iterator node = m_Modules.GetFirst();
  77     while (node)
  78     {
  79         wxHtmlTagsModule *mod = (wxHtmlTagsModule*) node->GetData();
  80         mod->FillHandlersTable(this);
  81         node = node->GetNext();
  82     }
  83 }
  84
  85 wxHtmlWinParser::~wxHtmlWinParser()
  86 {
  87     int i, j, k, l, m;
  88
  89     for (i = 0; i < 2; i++)
  90         for (j = 0; j < 2; j++)
  91             for (k = 0; k < 2; k++)
  92                 for (l = 0; l < 2; l++)
  93                     for (m = 0; m < 7; m++)
  94                     {
  95                         if (m_FontsTable[i][j][k][l][m] != NULL)
  96                             delete m_FontsTable[i][j][k][l][m];
  97                     }
  98 #if !wxUSE_UNICODE
  99     delete m_EncConv;
 100 #endif
 101     delete[] m_tmpStrBuf;
 102 }
 103
 104 void wxHtmlWinParser::AddModule(wxHtmlTagsModule *module)
 105 {
 106     m_Modules.Append(module);
 107 }
 108
 109 void wxHtmlWinParser::RemoveModule(wxHtmlTagsModule *module)
 110 {
 111     m_Modules.DeleteObject(module);
 112 }
 113
 114 void wxHtmlWinParser::SetFonts(const wxString& normal_face, const wxString& fixed_face,
 115                                const int *sizes)
 116 {
 117     static int default_sizes[7] =
 118         {
 119             wxHTML_FONT_SIZE_1,
 120             wxHTML_FONT_SIZE_2,
 121             wxHTML_FONT_SIZE_3,
 122             wxHTML_FONT_SIZE_4,
 123             wxHTML_FONT_SIZE_5,
 124             wxHTML_FONT_SIZE_6,
 125             wxHTML_FONT_SIZE_7
 126         };
 127
 128     if (sizes == NULL) sizes = default_sizes;
 129
 130     int i, j, k, l, m;
 131
 132     for (i = 0; i < 7; i++) m_FontsSizes[i] = sizes[i];
 133     m_FontFaceFixed = fixed_face;
 134     m_FontFaceNormal = normal_face;
 135
 136 #if !wxUSE_UNICODE
 137     SetInputEncoding(m_InputEnc);
 138 #endif
 139
 140     for (i = 0; i < 2; i++)
 141         for (j = 0; j < 2; j++)
 142             for (k = 0; k < 2; k++)
 143                 for (l = 0; l < 2; l++)
 144                     for (m = 0; m < 7; m++) {
 145                         if (m_FontsTable[i][j][k][l][m] != NULL)
 146                         {
 147                             delete m_FontsTable[i][j][k][l][m];
 148                             m_FontsTable[i][j][k][l][m] = NULL;
 149                         }
 150                     }
 151 }
 152
 153 void wxHtmlWinParser::SetStandardFonts(int size,
 154                                        const wxString& normal_face,
 155                                        const wxString& fixed_face)
 156 {
 157     wxFont defaultFont = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 158
 159     int f_sizes[7];
 160     if (size == -1)
 161         size = defaultFont.GetPointSize();
 162
 163     f_sizes[0] = int(size * 0.6);
 164     f_sizes[1] = int(size * 0.8);
 165     f_sizes[2] = size;
 166     f_sizes[3] = int(size * 1.2);
 167     f_sizes[4] = int(size * 1.4);
 168     f_sizes[5] = int(size * 1.6);
 169     f_sizes[6] = int(size * 1.8);
 170
 171     wxString normal = normal_face.empty() ?
 172                       defaultFont.GetFaceName() : normal_face;
 173
 174     SetFonts(normal, fixed_face, f_sizes);
 175 }
 176
 177 void wxHtmlWinParser::InitParser(const wxString& source)
 178 {
 179     wxHtmlParser::InitParser(source);
 180     wxASSERT_MSG(m_DC != NULL, wxT("no DC assigned to wxHtmlWinParser!!"));
 181
 182     m_FontBold = m_FontItalic = m_FontUnderlined = m_FontFixed = FALSE;
 183     m_FontSize = 3; //default one
 184     CreateCurrentFont();           // we're selecting default font into
 185     m_DC->GetTextExtent( wxT("H"), &m_CharWidth, &m_CharHeight);
 186                 /* NOTE : we're not using GetCharWidth/Height() because
 187                    of differences under X and win
 188                  */
 189
 190     m_UseLink = false;
 191     m_Link = wxHtmlLinkInfo( wxEmptyString );
 192     m_LinkColor.Set(0, 0, 0xFF);
 193     m_ActualColor.Set(0, 0, 0);
 194     m_Align = wxHTML_ALIGN_LEFT;
 195     m_tmpLastWasSpace = false;
 196     m_lastWordCell = NULL;
 197
 198     OpenContainer();
 199     OpenContainer();
 200
 201 #if !wxUSE_UNICODE
 202     wxString charset = ExtractCharsetInformation(source);
 203     if (!charset.empty())
 204     {
 205         wxFontEncoding enc = wxFontMapper::Get()->CharsetToEncoding(charset);
 206         if (enc != wxFONTENCODING_SYSTEM)
 207           SetInputEncoding(enc);
 208     }
 209 #endif
 210
 211     m_Container->InsertCell(new wxHtmlColourCell(m_ActualColor));
 212     wxColour windowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW) ;
 213     m_Container->InsertCell(
 214             new wxHtmlColourCell(GetWindow() ?
 215                                      GetWindow()->GetBackgroundColour() :
 216                                      windowColour,
 217                                  wxHTML_CLR_BACKGROUND));
 218     m_Container->InsertCell(new wxHtmlFontCell(CreateCurrentFont()));
 219 }
 220
 221 void wxHtmlWinParser::DoneParser()
 222 {
 223     m_Container = NULL;
 224 #if !wxUSE_UNICODE
 225     SetInputEncoding(wxFONTENCODING_ISO8859_1); // for next call
 226 #endif
 227     wxHtmlParser::DoneParser();
 228 }
 229
 230 wxObject* wxHtmlWinParser::GetProduct()
 231 {
 232     wxHtmlContainerCell *top;
 233
 234     CloseContainer();
 235     OpenContainer();
 236
 237     top = m_Container;
 238     while (top->GetParent()) top = top->GetParent();
 239     top->RemoveExtraSpacing(true, true);
 240
 241     return top;
 242 }
 243
 244 wxFSFile *wxHtmlWinParser::OpenURL(wxHtmlURLType type,
 245                                    const wxString& url) const
 246 {
 247     if ( m_Window )
 248     {
 249         wxString myurl(url);
 250         wxHtmlOpeningStatus status;
 251         for (;;)
 252         {
 253             wxString myfullurl(myurl);
 254
 255             // consider url as absolute path first
 256             wxURI current(myurl);
 257             myfullurl = current.BuildUnescapedURI();
 258
 259             // if not absolute then ...
 260             if( current.IsReference() )
 261             {
 262                 wxString basepath = GetFS()->GetPath();
 263                 wxURI base(basepath);
 264
 265                 // ... try to apply base path if valid ...
 266                 if( !base.IsReference() )
 267                 {
 268                     wxURI path(myfullurl);
 269                     path.Resolve( base );
 270                     myfullurl = path.BuildUnescapedURI();
 271                 }
 272                 else
 273                 {
 274                     // ... or force such addition if not included already
 275                     if( !current.GetPath().Contains(base.GetPath()) )
 276                     {
 277                         basepath += myurl;
 278                         wxURI connected( basepath );
 279                         myfullurl = connected.BuildUnescapedURI();
 280                     }
 281                 }
 282             }
 283
 284             wxString redirect;
 285             status = m_Window->OnOpeningURL(type, myfullurl, &redirect);
 286             if ( status != wxHTML_REDIRECT )
 287                 break;
 288
 289             myurl = redirect;
 290         }
 291
 292         if ( status == wxHTML_BLOCK )
 293             return NULL;
 294
 295         return GetFS()->OpenFile(myurl);
 296     }
 297
 298     return wxHtmlParser::OpenURL(type, url);
 299 }
 300
 301 void wxHtmlWinParser::AddText(const wxChar* txt)
 302 {
 303     size_t i = 0,
 304            x,
 305            lng = wxStrlen(txt);
 306     register wxChar d;
 307     int templen = 0;
 308     wxChar nbsp = GetEntitiesParser()->GetCharForCode(160 /* nbsp */);
 309
 310     if (lng+1 > m_tmpStrBufSize)
 311     {
 312         delete[] m_tmpStrBuf;
 313         m_tmpStrBuf = new wxChar[lng+1];
 314         m_tmpStrBufSize = lng+1;
 315     }
 316     wxChar *temp = m_tmpStrBuf;
 317
 318     if (m_tmpLastWasSpace)
 319     {
 320         while ((i < lng) &&
 321                ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) || (txt[i] == wxT(' ')) ||
 322                 (txt[i] == wxT('\t')))) i++;
 323     }
 324
 325     while (i < lng)
 326     {
 327         x = 0;
 328         d = temp[templen++] = txt[i];
 329         if ((d == wxT('\n')) || (d == wxT('\r')) || (d == wxT(' ')) || (d == wxT('\t')))
 330         {
 331             i++, x++;
 332             while ((i < lng) && ((txt[i] == wxT('\n')) || (txt[i] == wxT('\r')) ||
 333                                  (txt[i] == wxT(' ')) || (txt[i] == wxT('\t')))) i++, x++;
 334         }
 335         else i++;
 336
 337         if (x)
 338         {
 339             temp[templen-1] = wxT(' ');
 340             DoAddText(temp, templen, nbsp);
 341             m_tmpLastWasSpace = true;
 342         }
 343     }
 344
 345     if (templen && (templen > 1 || temp[0] != wxT(' ')))
 346     {
 347         DoAddText(temp, templen, nbsp);
 348         m_tmpLastWasSpace = false;
 349     }
 350 }
 351
 352 void wxHtmlWinParser::DoAddText(wxChar *temp, int& templen, wxChar nbsp)
 353 {
 354     temp[templen] = 0;
 355     templen = 0;
 356 #if !wxUSE_UNICODE
 357     if (m_EncConv)
 358         m_EncConv->Convert(temp);
 359 #endif
 360     size_t len = wxStrlen(temp);
 361     for (size_t j = 0; j < len; j++)
 362     {
 363         if (temp[j] == nbsp)
 364             temp[j] = wxT(' ');
 365     }
 366
 367     wxHtmlCell *c = new wxHtmlWordCell(temp, *(GetDC()));
 368
 369     if (m_UseLink)
 370         c->SetLink(m_Link);
 371     m_Container->InsertCell(c);
 372     ((wxHtmlWordCell*)c)->SetPreviousWord(m_lastWordCell);
 373     m_lastWordCell = (wxHtmlWordCell*)c;
 374 }
 375
 376
 377
 378 wxHtmlContainerCell* wxHtmlWinParser::OpenContainer()
 379 {
 380     m_Container = new wxHtmlContainerCell(m_Container);
 381     m_Container->SetAlignHor(m_Align);
 382     m_tmpLastWasSpace = true;
 383         /* to avoid space being first character in paragraph */
 384     return m_Container;
 385 }
 386
 387
 388
 389 wxHtmlContainerCell* wxHtmlWinParser::SetContainer(wxHtmlContainerCell *c)
 390 {
 391     m_tmpLastWasSpace = true;
 392         /* to avoid space being first character in paragraph */
 393     return m_Container = c;
 394 }
 395
 396
 397
 398 wxHtmlContainerCell* wxHtmlWinParser::CloseContainer()
 399 {
 400     m_Container = m_Container->GetParent();
 401     return m_Container;
 402 }
 403
 404
 405 void wxHtmlWinParser::SetFontSize(int s)
 406 {
 407     if (s < 1) s = 1;
 408     else if (s > 7) s = 7;
 409     m_FontSize = s;
 410 }
 411
 412
 413
 414 wxFont* wxHtmlWinParser::CreateCurrentFont()
 415 {
 416     int fb = GetFontBold(),
 417         fi = GetFontItalic(),
 418         fu = GetFontUnderlined(),
 419         ff = GetFontFixed(),
 420         fs = GetFontSize() - 1 /*remap from <1;7> to <0;6>*/ ;
 421
 422     wxString face = ff ? m_FontFaceFixed : m_FontFaceNormal;
 423     wxString *faceptr = &(m_FontsFacesTable[fb][fi][fu][ff][fs]);
 424     wxFont **fontptr = &(m_FontsTable[fb][fi][fu][ff][fs]);
 425 #if !wxUSE_UNICODE
 426     wxFontEncoding *encptr = &(m_FontsEncTable[fb][fi][fu][ff][fs]);
 427 #endif
 428
 429     if (*fontptr != NULL && (*faceptr != face
 430 #if !wxUSE_UNICODE
 431                              || *encptr != m_OutputEnc
 432 #endif
 433                             ))
 434     {
 435         delete *fontptr;
 436         *fontptr = NULL;
 437     }
 438
 439     if (*fontptr == NULL)
 440     {
 441         *faceptr = face;
 442         *fontptr = new wxFont(
 443                        (int) (m_FontsSizes[fs] * m_PixelScale),
 444                        ff ? wxMODERN : wxSWISS,
 445                        fi ? wxITALIC : wxNORMAL,
 446                        fb ? wxBOLD : wxNORMAL,
 447                        fu ? true : false, face
 448 #if wxUSE_UNICODE
 449                        );
 450 #else
 451                        , m_OutputEnc);
 452         *encptr = m_OutputEnc;
 453 #endif
 454     }
 455     m_DC->SetFont(**fontptr);
 456     return (*fontptr);
 457 }
 458
 459
 460
 461 void wxHtmlWinParser::SetLink(const wxHtmlLinkInfo& link)
 462 {
 463     m_Link = link;
 464     m_UseLink = (link.GetHref() != wxEmptyString);
 465 }
 466
 467
 468 void wxHtmlWinParser::SetFontFace(const wxString& face)
 469 {
 470     if (GetFontFixed()) m_FontFaceFixed = face;
 471     else m_FontFaceNormal = face;
 472
 473 #if !wxUSE_UNICODE
 474     if (m_InputEnc != wxFONTENCODING_DEFAULT)
 475         SetInputEncoding(m_InputEnc);
 476 #endif
 477 }
 478
 479
 480
 481 #if !wxUSE_UNICODE
 482 void wxHtmlWinParser::SetInputEncoding(wxFontEncoding enc)
 483 {
 484     m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 485     if (m_EncConv)
 486     {
 487         delete m_EncConv;
 488         m_EncConv = NULL;
 489     }
 490
 491     if (enc == wxFONTENCODING_DEFAULT) return;
 492
 493     wxFontEncoding altfix, altnorm;
 494     bool availfix, availnorm;
 495
 496     // exact match?
 497     availnorm = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceNormal);
 498     availfix = wxFontMapper::Get()->IsEncodingAvailable(enc, m_FontFaceFixed);
 499     if (availnorm && availfix)
 500         m_OutputEnc = enc;
 501
 502     // alternatives?
 503     else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, false) &&
 504              wxFontMapper::Get()->GetAltForEncoding(enc, &altfix, m_FontFaceFixed, false) &&
 505              altnorm == altfix)
 506         m_OutputEnc = altnorm;
 507
 508     // at least normal face?
 509     else if (availnorm)
 510         m_OutputEnc = enc;
 511     else if (wxFontMapper::Get()->GetAltForEncoding(enc, &altnorm, m_FontFaceNormal, false))
 512         m_OutputEnc = altnorm;
 513
 514     else
 515     {
 516 #ifndef __WXMAC__
 517         // okay, let convert to ISO_8859-1, available always
 518         m_OutputEnc = wxFONTENCODING_DEFAULT;
 519 #else
 520         m_OutputEnc = wxLocale::GetSystemEncoding() ;
 521 #endif
 522     }
 523
 524     m_InputEnc = enc;
 525     if (m_OutputEnc == wxFONTENCODING_DEFAULT)
 526         GetEntitiesParser()->SetEncoding(wxFONTENCODING_SYSTEM);
 527     else
 528         GetEntitiesParser()->SetEncoding(m_OutputEnc);
 529
 530     if (m_InputEnc == m_OutputEnc) return;
 531
 532     m_EncConv = new wxEncodingConverter();
 533     if (!m_EncConv->Init(m_InputEnc,
 534                            (m_OutputEnc == wxFONTENCODING_DEFAULT) ?
 535                                       wxFONTENCODING_ISO8859_1 : m_OutputEnc,
 536                            wxCONVERT_SUBSTITUTE))
 537     { // total failture :-(
 538         wxLogError(_("Failed to display HTML document in %s encoding"),
 539                    wxFontMapper::GetEncodingName(enc).c_str());
 540         m_InputEnc = m_OutputEnc = wxFONTENCODING_DEFAULT;
 541         delete m_EncConv;
 542         m_EncConv = NULL;
 543     }
 544 }
 545 #endif
 546
 547
 548
 549
 550 //-----------------------------------------------------------------------------
 551 // wxHtmlWinTagHandler
 552 //-----------------------------------------------------------------------------
 553
 554 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWinTagHandler, wxHtmlTagHandler)
 555
 556 //-----------------------------------------------------------------------------
 557 // wxHtmlTagsModule
 558 //-----------------------------------------------------------------------------
 559
 560 // NB: This is *NOT* winpars.cpp's initialization and shutdown code!!
 561 //     This module is an ancestor for tag handlers modules defined
 562 //     in m_*.cpp files with TAGS_MODULE_BEGIN...TAGS_MODULE_END construct.
 563 //
 564 //     Do not add any winpars.cpp shutdown or initialization code to it,
 565 //     create a new module instead!
 566
 567 IMPLEMENT_DYNAMIC_CLASS(wxHtmlTagsModule, wxModule)
 568
 569 bool wxHtmlTagsModule::OnInit()
 570 {
 571     wxHtmlWinParser::AddModule(this);
 572     return true;
 573 }
 574
 575 void wxHtmlTagsModule::OnExit()
 576 {
 577     wxHtmlWinParser::RemoveModule(this);
 578 }
 579
 580 #endif
 581