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