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